1mbed TLS ChangeLog (Sorted per branch, date) 2 3= mbed TLS 2.27.0 branch released 2021-07-07 4 5API changes 6 * Update AEAD output size macros to bring them in line with the PSA Crypto 7 API version 1.0 spec. This version of the spec parameterizes them on the 8 key type used, as well as the key bit-size in the case of 9 PSA_AEAD_TAG_LENGTH. 10 The old versions of these macros were renamed and deprecated as follows: 11 - PSA_AEAD_TAG_LENGTH -> PSA_AEAD_TAG_LENGTH_1_ARG 12 - PSA_AEAD_ENCRYPT_OUTPUT_SIZE -> PSA_AEAD_ENCRYPT_OUTPUT_SIZE_2_ARG 13 - PSA_AEAD_DECRYPT_OUTPUT_SIZE -> PSA_AEAD_DECRYPT_OUTPUT_SIZE_2_ARG 14 - PSA_AEAD_UPDATE_OUTPUT_SIZE -> PSA_AEAD_UPDATE_OUTPUT_SIZE_2_ARG 15 - PSA_AEAD_FINISH_OUTPUT_SIZE -> PSA_AEAD_FINISH_OUTPUT_SIZE_1_ARG 16 - PSA_AEAD_VERIFY_OUTPUT_SIZE -> PSA_AEAD_VERIFY_OUTPUT_SIZE_1_ARG 17 * Implement one-shot cipher functions, psa_cipher_encrypt and 18 psa_cipher_decrypt, according to the PSA Crypto API 1.0.0 19 specification. 20 21Requirement changes 22 * The library now uses the %zu format specifier with the printf() family of 23 functions, so requires a toolchain that supports it. This change does not 24 affect the maintained LTS branches, so when contributing changes please 25 bear this in mind and do not add them to backported code. 26 27Features 28 * Add mbedtls_rsa_rsassa_pss_sign_ext() function allowing to generate a 29 signature with a specific salt length. This function allows to validate 30 test cases provided in the NIST's CAVP test suite. Contributed by Cédric 31 Meuter in PR #3183. 32 * Added support for built-in driver keys through the PSA opaque crypto 33 driver interface. Refer to the documentation of 34 MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS for more information. 35 * Implement psa_sign_message() and psa_verify_message(). 36 * The new function mbedtls_mpi_random() generates a random value in a 37 given range uniformly. 38 * Implement psa_mac_compute() and psa_mac_verify() as defined in the 39 PSA Cryptograpy API 1.0.0 specification. 40 * MBEDTLS_ECP_MAX_BITS is now determined automatically from the configured 41 curves and no longer needs to be configured explicitly to save RAM. 42 43Security 44 * Fix a bias in the generation of finite-field Diffie-Hellman-Merkle (DHM) 45 private keys and of blinding values for DHM and elliptic curves (ECP) 46 computations. Reported by FlorianF89 in #4245. 47 * Fix a potential side channel vulnerability in ECDSA ephemeral key generation. 48 An adversary who is capable of very precise timing measurements could 49 learn partial information about the leading bits of the nonce used for the 50 signature, allowing the recovery of the private key after observing a 51 large number of signature operations. This completes a partial fix in 52 Mbed TLS 2.20.0. 53 * It was possible to configure MBEDTLS_ECP_MAX_BITS to a value that is 54 too small, leading to buffer overflows in ECC operations. Fail the build 55 in such a case. 56 * An adversary with access to precise enough information about memory 57 accesses (typically, an untrusted operating system attacking a secure 58 enclave) could recover an RSA private key after observing the victim 59 performing a single private-key operation. Found and reported by 60 Zili KOU, Wenjian HE, Sharad Sinha, and Wei ZHANG. 61 * An adversary with access to precise enough timing information (typically, a 62 co-located process) could recover a Curve25519 or Curve448 static ECDH key 63 after inputting a chosen public key and observing the victim performing the 64 corresponding private-key operation. Found and reported by Leila Batina, 65 Lukas Chmielewski, Björn Haase, Niels Samwel and Peter Schwabe. 66 67Bugfix 68 * Add printf function attributes to mbedtls_debug_print_msg to ensure we 69 get printf format specifier warnings. 70 * Fix premature fopen() call in mbedtls_entropy_write_seed_file which may 71 lead to seed file corruption in the case where the path to the seed file is 72 equal to MBEDTLS_PLATFORM_STD_NV_SEED_FILE. Contributed by Victor 73 Krasnoshchok in #3616. 74 * PSA functions other than psa_open_key now return PSA_ERROR_INVALID_HANDLE 75 rather than PSA_ERROR_DOES_NOT_EXIST for an invalid handle, bringing them 76 in line with version 1.0.0 of the specification. Fix #4162. 77 * PSA functions creating a key now return PSA_ERROR_INVALID_ARGUMENT rather 78 than PSA_ERROR_INVALID_HANDLE when the identifier specified for the key 79 to create is not valid, bringing them in line with version 1.0.0 of the 80 specification. Fix #4271. 81 * Fix some cases in the bignum module where the library constructed an 82 unintended representation of the value 0 which was not processed 83 correctly by some bignum operations. This could happen when 84 mbedtls_mpi_read_string() was called on "-0", or when 85 mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of 86 the arguments being negative and the other being 0. Fixes #4643. 87 * Fix a bug in ECDSA that would cause it to fail when the hash is all-bits 88 zero. Fixes #1792 89 * Fix a compilation error when MBEDTLS_ECP_RANDOMIZE_MXZ_ALT is 90 defined. Fixes #4217. 91 * Fix an incorrect error code when parsing a PKCS#8 private key. 92 * In a TLS client, enforce the Diffie-Hellman minimum parameter size 93 set with mbedtls_ssl_conf_dhm_min_bitlen() precisely. Before, the 94 minimum size was rounded down to the nearest multiple of 8. 95 * In library/net_sockets.c, _POSIX_C_SOURCE and _XOPEN_SOURCE are 96 defined to specific values. If the code is used in a context 97 where these are already defined, this can result in a compilation 98 error. Instead, assume that if they are defined, the values will 99 be adequate to build Mbed TLS. 100 * The cipher suite TLS-RSA-WITH-CAMELLIA-256-GCM-SHA384 was not available 101 when SHA-1 was disabled and was offered when SHA-1 was enabled but SHA-384 102 was disabled. Fix the dependency. Fixes #4472. 103 * Do not offer SHA384 cipher suites when SHA-384 is disabled. Fixes #4499. 104 * With MBEDTLS_PSA_CRYPTO_C disabled, some functions were getting built 105 nonetheless, resulting in undefined reference errors when building a 106 shared library. Reported by Guillermo Garcia M. in #4411. 107 * Fix test suite code on platforms where int32_t is not int, such as 108 Arm Cortex-M. Fixes #4530. 109 * Fix some issues affecting MBEDTLS_ARIA_ALT implementations: a misplaced 110 directive in a header and a missing initialization in the self-test. 111 * Fix a missing initialization in the Camellia self-test, affecting 112 MBEDTLS_CAMELLIA_ALT implementations. 113 * Restore the ability to configure PSA via Mbed TLS options to support RSA 114 key pair operations but exclude RSA key generation. When MBEDTLS_GENPRIME 115 is not defined PSA will no longer attempt to use mbedtls_rsa_gen_key(). 116 Fixes #4512. 117 * Fix a regression introduced in 2.24.0 which broke (D)TLS CBC ciphersuites 118 (when the encrypt-then-MAC extension is not in use) with some ALT 119 implementations of the underlying hash (SHA-1, SHA-256, SHA-384), causing 120 the affected side to wrongly reject valid messages. Fixes #4118. 121 * Remove outdated check-config.h check that prevented implementing the 122 timing module on Mbed OS. Fixes #4633. 123 * Fix PSA_ALG_TLS12_PRF and PSA_ALG_TLS12_PSK_TO_MS being too permissive 124 about missing inputs. 125 * Fix mbedtls_net_poll() and mbedtls_net_recv_timeout() often failing with 126 MBEDTLS_ERR_NET_POLL_FAILED on Windows. Fixes #4465. 127 * Fix a resource leak in a test suite with an alternative AES 128 implementation. Fixes #4176. 129 * Fix a crash in mbedtls_mpi_debug_mpi on a bignum having 0 limbs. This 130 could notably be triggered by setting the TLS debug level to 3 or above 131 and using a Montgomery curve for the key exchange. Reported by lhuang04 132 in #4578. Fixes #4608. 133 * psa_verify_hash() was relying on implementation-specific behavior of 134 mbedtls_rsa_rsassa_pss_verify() and was causing failures in some _ALT 135 implementations. This reliance is now removed. Fixes #3990. 136 * Disallow inputs of length different from the corresponding hash when 137 signing or verifying with PSA_ALG_RSA_PSS (The PSA Crypto API mandates 138 that PSA_ALG_RSA_PSS uses the same hash throughout the algorithm.) 139 * Fix a null pointer dereference when mbedtls_mpi_exp_mod() was called with 140 A=0 represented with 0 limbs. Up to and including Mbed TLS 2.26, this bug 141 could not be triggered by code that constructed A with one of the 142 mbedtls_mpi_read_xxx functions (including in particular TLS code) since 143 those always built an mpi object with at least one limb. 144 Credit to OSS-Fuzz. Fixes #4641. 145 * Fix mbedtls_mpi_gcd(G,A,B) when the value of B is zero. This had no 146 effect on Mbed TLS's internal use of mbedtls_mpi_gcd(), but may affect 147 applications that call mbedtls_mpi_gcd() directly. Fixes #4642. 148 * The PSA API no longer allows the creation or destruction of keys with a 149 read-only lifetime. The persistence level PSA_KEY_PERSISTENCE_READ_ONLY 150 can now only be used as intended, for keys that cannot be modified through 151 normal use of the API. 152 * When MBEDTLS_PSA_CRYPTO_SPM is enabled, crypto_spe.h was not included 153 in all the right places. Include it from crypto_platform.h, which is 154 the natural place. Fixes #4649. 155 * mbedtls_pk_sign() and mbedtls_pk_verify() and their extended and 156 restartable variants now always honor the specified hash length if 157 nonzero. Before, for RSA, hash_len was ignored in favor of the length of 158 the specified hash algorithm. 159 * Fix which alert is sent in some cases to conform to the 160 applicable RFC: on an invalid Finished message value, an 161 invalid max_fragment_length extension, or an 162 unsupported extension used by the server. 163 * Correct (change from 12 to 13 bytes) the value of the macro describing the 164 maximum nonce length returned by psa_aead_generate_nonce(). 165 166Changes 167 * Add extra printf compiler warning flags to builds. 168 * Fix memsan build false positive in x509_crt.c with Clang 11 169 * Fix the setting of the read timeout in the DTLS sample programs. 170 * Remove the AES sample application programs/aes/aescrypt2 which shows 171 bad cryptographic practice. Fix #1906. 172 * Alternative implementations of CMAC may now opt to not support 3DES as a 173 CMAC block cipher, and still pass the CMAC self test. 174 * Remove configs/config-psa-crypto.h, which was identical to the default 175 configuration except for having some extra cryptographic mechanisms 176 enabled and for unintended differences. This configuration was primarily 177 intended to demonstrate the PSA API, and lost most of its usefulness when 178 MBEDTLS_PSA_CRYPTO_C became enabled by default. 179 * When building the test suites with GNU make, invoke python3 or python, not 180 python2, which is no longer supported upstream. 181 * When using session cache based session resumption on the server, 182 double-check that custom session cache implementations return 183 sessions which are consistent with the negotiated ciphersuite 184 and compression method. 185 * Fix build failure on MinGW toolchain when __USE_MING_ANSI_STDIO is on. 186 When that flag is on, standard GNU C printf format specifiers 187 should be used. 188 * Reduce the default value of MBEDTLS_ECP_WINDOW_SIZE. This reduces RAM usage 189 during ECC operations at a negligible performance cost. 190 * mbedtls_mpi_read_binary(), mbedtls_mpi_read_binary_le() and 191 mbedtls_mpi_read_string() now construct an mbedtls_mpi object with 0 limbs 192 when their input has length 0. Note that this is an implementation detail 193 and can change at any time, so this change should be transparent, but it 194 may result in mbedtls_mpi_write_binary() or mbedtls_mpi_write_string() 195 now writing an empty string where it previously wrote one or more 196 zero digits when operating from values constructed with an mpi_read 197 function and some mpi operations. 198 * Implicitly add PSA_KEY_USAGE_SIGN_MESSAGE key usage policy flag when 199 PSA_KEY_USAGE_SIGN_HASH flag is set and PSA_KEY_USAGE_VERIFY_MESSAGE flag 200 when PSA_KEY_USAGE_VERIFY_HASH flag is set. This usage flag extension 201 is also applied when loading a key from storage. 202 203= mbed TLS 2.26.0 branch released 2021-03-08 204 205API changes 206 * Renamed the PSA Crypto API output buffer size macros to bring them in line 207 with version 1.0.0 of the specification. 208 * The API glue function mbedtls_ecc_group_of_psa() now takes the curve size 209 in bits rather than bytes, with an additional flag to indicate if the 210 size may have been rounded up to a whole number of bytes. 211 * Renamed the PSA Crypto API AEAD tag length macros to bring them in line 212 with version 1.0.0 of the specification. 213 214Default behavior changes 215 * In mbedtls_rsa_context objects, the ver field was formerly documented 216 as always 0. It is now reserved for internal purposes and may take 217 different values. 218 219New deprecations 220 * PSA_KEY_EXPORT_MAX_SIZE, PSA_HASH_SIZE, PSA_MAC_FINAL_SIZE, 221 PSA_BLOCK_CIPHER_BLOCK_SIZE, PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE and 222 PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN have been renamed, and the old names 223 deprecated. 224 * PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH and PSA_ALG_AEAD_WITH_TAG_LENGTH 225 have been renamed, and the old names deprecated. 226 227Features 228 * The PSA crypto subsystem can now use HMAC_DRBG instead of CTR_DRBG. 229 CTR_DRBG is used by default if it is available, but you can override 230 this choice by setting MBEDTLS_PSA_HMAC_DRBG_MD_TYPE at compile time. 231 Fix #3354. 232 * Automatic fallback to a software implementation of ECP when 233 MBEDTLS_ECP_xxx_ALT accelerator hooks are in use can now be turned off 234 through setting the new configuration flag MBEDTLS_ECP_NO_FALLBACK. 235 * The PSA crypto subsystem can now be configured to use less static RAM by 236 tweaking the setting for the maximum amount of keys simultaneously in RAM. 237 MBEDTLS_PSA_KEY_SLOT_COUNT sets the maximum number of volatile keys that 238 can exist simultaneously. It has a sensible default if not overridden. 239 * Partial implementation of the PSA crypto driver interface: Mbed TLS can 240 now use an external random generator instead of the library's own 241 entropy collection and DRBG code. Enable MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG 242 and see the documentation of mbedtls_psa_external_get_random() for details. 243 * Applications using both mbedtls_xxx and psa_xxx functions (for example, 244 applications using TLS and MBEDTLS_USE_PSA_CRYPTO) can now use the PSA 245 random generator with mbedtls_xxx functions. See the documentation of 246 mbedtls_psa_get_random() for details. 247 * In the PSA API, the policy for a MAC or AEAD algorithm can specify a 248 minimum MAC or tag length thanks to the new wildcards 249 PSA_ALG_AT_LEAST_THIS_LENGTH_MAC and 250 PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG. 251 252Security 253 * Fix a security reduction in CTR_DRBG when the initial seeding obtained a 254 nonce from entropy. Applications were affected if they called 255 mbedtls_ctr_drbg_set_nonce_len(), if they called 256 mbedtls_ctr_drbg_set_entropy_len() with a size that was 3/2 times the key 257 length, or when the entropy module uses SHA-256 and CTR_DRBG uses AES-256. 258 In such cases, a random nonce was necessary to achieve the advertised 259 security strength, but the code incorrectly used a constant instead of 260 entropy from the nonce. 261 Found by John Stroebel in #3819 and fixed in #3973. 262 * Fix a buffer overflow in mbedtls_mpi_sub_abs() when calculating 263 |A| - |B| where |B| is larger than |A| and has more limbs (so the 264 function should return MBEDTLS_ERR_MPI_NEGATIVE_VALUE). Only 265 applications calling mbedtls_mpi_sub_abs() directly are affected: 266 all calls inside the library were safe since this function is 267 only called with |A| >= |B|. Reported by Guido Vranken in #4042. 268 * Fix an errorneous estimation for an internal buffer in 269 mbedtls_pk_write_key_pem(). If MBEDTLS_MPI_MAX_SIZE is set to an odd 270 value the function might fail to write a private RSA keys of the largest 271 supported size. 272 Found by Daniel Otte, reported in #4093 and fixed in #4094. 273 * Fix a stack buffer overflow with mbedtls_net_poll() and 274 mbedtls_net_recv_timeout() when given a file descriptor that is 275 beyond FD_SETSIZE. Reported by FigBug in #4169. 276 * Guard against strong local side channel attack against base64 tables by 277 making access aceess to them use constant flow code. 278 279Bugfix 280 * Fix use-after-scope error in programs/ssl/ssl_client2.c and ssl_server2.c 281 * Fix memory leak that occured when calling psa_close_key() on a 282 wrapped key with MBEDTLS_PSA_CRYPTO_SE_C defined. 283 * Fix an incorrect error code if an RSA private operation glitched. 284 * Fix a memory leak in an error case in psa_generate_derived_key_internal(). 285 * Fix a resource leak in CTR_DRBG and HMAC_DRBG when MBEDTLS_THREADING_C 286 is enabled, on platforms where initializing a mutex allocates resources. 287 This was a regression introduced in the previous release. Reported in 288 #4017, #4045 and #4071. 289 * Ensure that calling mbedtls_rsa_free() or mbedtls_entropy_free() 290 twice is safe. This happens for RSA when some Mbed TLS library functions 291 fail. Such a double-free was not safe when MBEDTLS_THREADING_C was 292 enabled on platforms where freeing a mutex twice is not safe. 293 * Fix a resource leak in a bad-arguments case of mbedtls_rsa_gen_key() 294 when MBEDTLS_THREADING_C is enabled on platforms where initializing 295 a mutex allocates resources. 296 * Fixes a bug where, if the library was configured to include support for 297 both the old SE interface and the new PSA driver interface, external keys were 298 not loaded from storage. This was fixed by #3996. 299 * This change makes 'mbedtls_x509write_crt_set_basic_constraints' 300 consistent with RFC 5280 4.2.1.9 which says: "Conforming CAs MUST 301 include this extension in all CA certificates that contain public keys 302 used to validate digital signatures on certificates and MUST mark the 303 extension as critical in such certificates." Previous to this change, 304 the extension was always marked as non-critical. This was fixed by 305 #3698. 306 307Changes 308 * A new library C file psa_crypto_client.c has been created to contain 309 the PSA code needed by a PSA crypto client when the PSA crypto 310 implementation is not included into the library. 311 * On recent enough versions of FreeBSD and DragonFlyBSD, the entropy module 312 now uses the getrandom syscall instead of reading from /dev/urandom. 313 314= mbed TLS 2.25.0 branch released 2020-12-11 315 316API changes 317 * The numerical values of the PSA Crypto API macros have been updated to 318 conform to version 1.0.0 of the specification. 319 * PSA_ALG_STREAM_CIPHER replaces PSA_ALG_CHACHA20 and PSA_ALG_ARC4. 320 The underlying stream cipher is determined by the key type 321 (PSA_KEY_TYPE_CHACHA20 or PSA_KEY_TYPE_ARC4). 322 * The functions mbedtls_cipher_auth_encrypt() and 323 mbedtls_cipher_auth_decrypt() no longer accept NIST_KW contexts, 324 as they have no way to check if the output buffer is large enough. 325 Please use mbedtls_cipher_auth_encrypt_ext() and 326 mbedtls_cipher_auth_decrypt_ext() instead. Credit to OSS-Fuzz and 327 Cryptofuzz. Fixes #3665. 328 329Requirement changes 330 * Update the minimum required CMake version to 2.8.12. This silences a 331 warning on CMake 3.19.0. #3801 332 333New deprecations 334 * PSA_ALG_CHACHA20 and PSA_ALG_ARC4 have been deprecated. 335 Use PSA_ALG_STREAM_CIPHER instead. 336 * The functions mbedtls_cipher_auth_encrypt() and 337 mbedtls_cipher_auth_decrypt() are deprecated in favour of the new 338 functions mbedtls_cipher_auth_encrypt_ext() and 339 mbedtls_cipher_auth_decrypt_ext(). Please note that with AEAD ciphers, 340 these new functions always append the tag to the ciphertext, and include 341 the tag in the ciphertext length. 342 343Features 344 * Partial implementation of the new PSA Crypto accelerator APIs. (Symmetric 345 ciphers, asymmetric signing/verification and key generation, validate_key 346 entry point, and export_public_key interface.) 347 * Add support for ECB to the PSA cipher API. 348 * In PSA, allow using a key declared with a base key agreement algorithm 349 in combined key agreement and derivation operations, as long as the key 350 agreement algorithm in use matches the algorithm the key was declared with. 351 This is currently non-standard behaviour, but expected to make it into a 352 future revision of the PSA Crypto standard. 353 * Add MBEDTLS_TARGET_PREFIX CMake variable, which is prefixed to the mbedtls, 354 mbedcrypto, mbedx509 and apidoc CMake target names. This can be used by 355 external CMake projects that include this one to avoid CMake target name 356 clashes. The default value of this variable is "", so default target names 357 are unchanged. 358 * Add support for DTLS-SRTP as defined in RFC 5764. Contributed by Johan 359 Pascal, improved by Ron Eldor. 360 * In the PSA API, it is no longer necessary to open persistent keys: 361 operations now accept the key identifier. The type psa_key_handle_t is now 362 identical to psa_key_id_t instead of being platform-defined. This bridges 363 the last major gap to compliance with the PSA Cryptography specification 364 version 1.0.0. Opening persistent keys is still supported for backward 365 compatibility, but will be deprecated and later removed in future 366 releases. 367 * PSA_AEAD_NONCE_LENGTH, PSA_AEAD_NONCE_MAX_SIZE, PSA_CIPHER_IV_LENGTH and 368 PSA_CIPHER_IV_MAX_SIZE macros have been added as defined in version 369 1.0.0 of the PSA Crypto API specification. 370 371Security 372 * The functions mbedtls_cipher_auth_encrypt() and 373 mbedtls_cipher_auth_decrypt() would write past the minimum documented 374 size of the output buffer when used with NIST_KW. As a result, code using 375 those functions as documented with NIST_KW could have a buffer overwrite 376 of up to 15 bytes, with consequences ranging up to arbitrary code 377 execution depending on the location of the output buffer. 378 * Limit the size of calculations performed by mbedtls_mpi_exp_mod to 379 MBEDTLS_MPI_MAX_SIZE to prevent a potential denial of service when 380 generating Diffie-Hellman key pairs. Credit to OSS-Fuzz. 381 * A failure of the random generator was ignored in mbedtls_mpi_fill_random(), 382 which is how most uses of randomization in asymmetric cryptography 383 (including key generation, intermediate value randomization and blinding) 384 are implemented. This could cause failures or the silent use of non-random 385 values. A random generator can fail if it needs reseeding and cannot not 386 obtain entropy, or due to an internal failure (which, for Mbed TLS's own 387 CTR_DRBG or HMAC_DRBG, can only happen due to a misconfiguration). 388 * Fix a compliance issue whereby we were not checking the tag on the 389 algorithm parameters (only the size) when comparing the signature in the 390 description part of the cert to the real signature. This meant that a 391 NULL algorithm parameters entry would look identical to an array of REAL 392 (size zero) to the library and thus the certificate would be considered 393 valid. However, if the parameters do not match in *any* way then the 394 certificate should be considered invalid, and indeed OpenSSL marks these 395 certs as invalid when mbedtls did not. 396 Many thanks to guidovranken who found this issue via differential fuzzing 397 and reported it in #3629. 398 * Zeroising of local buffers and variables which are used for calculations 399 in mbedtls_pkcs5_pbkdf2_hmac(), mbedtls_internal_sha*_process(), 400 mbedtls_internal_md*_process() and mbedtls_internal_ripemd160_process() 401 functions to erase sensitive data from memory. Reported by 402 Johan Malmgren and Johan Uppman Bruce from Sectra. 403 404Bugfix 405 * Fix an invalid (but non-zero) return code from mbedtls_pk_parse_subpubkey() 406 when the input has trailing garbage. Fixes #2512. 407 * Fix build failure in configurations where MBEDTLS_USE_PSA_CRYPTO is 408 enabled but ECDSA is disabled. Contributed by jdurkop. Fixes #3294. 409 * Include the psa_constant_names generated source code in the source tree 410 instead of generating it at build time. Fixes #3524. 411 * Fix rsa_prepare_blinding() to retry when the blinding value is not 412 invertible (mod N), instead of returning MBEDTLS_ERR_RSA_RNG_FAILED. This 413 addresses a regression but is rare in practice (approx. 1 in 2/sqrt(N)). 414 Found by Synopsys Coverity, fix contributed by Peter Kolbus (Garmin). 415 Fixes #3647. 416 * Use socklen_t on Android and other POSIX-compliant system 417 * Fix the build when the macro _GNU_SOURCE is defined to a non-empty value. 418 Fix #3432. 419 * Consistently return PSA_ERROR_INVALID_ARGUMENT on invalid cipher input 420 sizes (instead of PSA_ERROR_BAD_STATE in some cases) to make the 421 psa_cipher_* functions compliant with the PSA Crypto API specification. 422 * mbedtls_ecp_curve_list() now lists Curve25519 and Curve448 under the names 423 "x25519" and "x448". These curves support ECDH but not ECDSA. If you need 424 only the curves that support ECDSA, filter the list with 425 mbedtls_ecdsa_can_do(). 426 * Fix psa_generate_key() returning an error when asked to generate 427 an ECC key pair on Curve25519 or secp244k1. 428 * Fix psa_key_derivation_output_key() to allow the output of a combined key 429 agreement and subsequent key derivation operation to be used as a key 430 inside of the PSA Crypto core. 431 * Fix handling of EOF against 0xff bytes and on platforms with unsigned 432 chars. Fixes a build failure on platforms where char is unsigned. Fixes 433 #3794. 434 * Fix an off-by-one error in the additional data length check for 435 CCM, which allowed encryption with a non-standard length field. 436 Fixes #3719. 437 * Correct the default IV size for mbedtls_cipher_info_t structures using 438 MBEDTLS_MODE_ECB to 0, since ECB mode ciphers don't use IVs. 439 * Make arc4random_buf available on NetBSD and OpenBSD when _POSIX_C_SOURCE is 440 defined. Fix contributed in #3571. 441 * Fix conditions for including string.h in error.c. Fixes #3866. 442 * psa_set_key_id() now also sets the lifetime to persistent for keys located 443 in a secure element. 444 * Attempting to create a volatile key with a non-zero key identifier now 445 fails. Previously the key identifier was just ignored when creating a 446 volatile key. 447 * Attempting to create or register a key with a key identifier in the vendor 448 range now fails. 449 * Fix build failures on GCC 11. Fixes #3782. 450 * Add missing arguments of debug message in mbedtls_ssl_decrypt_buf. 451 * Fix a memory leak in mbedtls_mpi_sub_abs() when the result was negative 452 (an error condition) and the second operand was aliased to the result. 453 * Fix a case in elliptic curve arithmetic where an out-of-memory condition 454 could go undetected, resulting in an incorrect result. 455 * In CTR_DRBG and HMAC_DRBG, don't reset the reseed interval in seed(). 456 Fixes #2927. 457 * In PEM writing functions, fill the trailing part of the buffer with null 458 bytes. This guarantees that the corresponding parsing function can read 459 the buffer back, which was the case for mbedtls_x509write_{crt,csr}_pem 460 until this property was inadvertently broken in Mbed TLS 2.19.0. 461 Fixes #3682. 462 * Fix a build failure that occurred with the MBEDTLS_AES_SETKEY_DEC_ALT 463 option on. In this configuration key management methods that are required 464 for MBEDTLS_CIPHER_MODE_XTS were excluded from the build and made it fail. 465 Fixes #3818. Reported by John Stroebel. 466 467Changes 468 * Reduce stack usage significantly during sliding window exponentiation. 469 Reported in #3591 and fix contributed in #3592 by Daniel Otte. 470 * The PSA persistent storage format is updated to always store the key bits 471 attribute. No automatic upgrade path is provided. Previously stored keys 472 must be erased, or manually upgraded based on the key storage format 473 specification (docs/architecture/mbed-crypto-storage-specification.md). 474 Fixes #3740. 475 * Remove the zeroization of a pointer variable in AES rounds. It was valid 476 but spurious and misleading since it looked like a mistaken attempt to 477 zeroize the pointed-to buffer. Reported by Antonio de la Piedra, CEA 478 Leti, France. 479 480= mbed TLS 2.24.0 branch released 2020-09-01 481 482API changes 483 * In the PSA API, rename the types of elliptic curve and Diffie-Hellman 484 group families to psa_ecc_family_t and psa_dh_family_t, in line with the 485 PSA Crypto API specification version 1.0.0. 486 Rename associated macros as well: 487 PSA_ECC_CURVE_xxx renamed to PSA_ECC_FAMILY_xxx 488 PSA_DH_GROUP_xxx renamed to PSA_DH_FAMILY_xxx 489 PSA_KEY_TYPE_GET_CURVE renamed to to PSA_KEY_TYPE_ECC_GET_FAMILY 490 PSA_KEY_TYPE_GET_GROUP renamed to PSA_KEY_TYPE_DH_GET_FAMILY 491 492Default behavior changes 493 * Stop storing persistent information about externally stored keys created 494 through PSA Crypto with a volatile lifetime. Reported in #3288 and 495 contributed by Steven Cooreman in #3382. 496 497Features 498 * The new function mbedtls_ecp_write_key() exports private ECC keys back to 499 a byte buffer. It is the inverse of the existing mbedtls_ecp_read_key(). 500 * Support building on e2k (Elbrus) architecture: correctly enable 501 -Wformat-signedness, and fix the code that causes signed-one-bit-field 502 and sign-compare warnings. Contributed by makise-homura (Igor Molchanov) 503 <akemi_homura@kurisa.ch>. 504 505Security 506 * Fix a vulnerability in the verification of X.509 certificates when 507 matching the expected common name (the cn argument of 508 mbedtls_x509_crt_verify()) with the actual certificate name: when the 509 subjecAltName extension is present, the expected name was compared to any 510 name in that extension regardless of its type. This means that an 511 attacker could for example impersonate a 4-bytes or 16-byte domain by 512 getting a certificate for the corresponding IPv4 or IPv6 (this would 513 require the attacker to control that IP address, though). Similar attacks 514 using other subjectAltName name types might be possible. Found and 515 reported by kFYatek in #3498. 516 * When checking X.509 CRLs, a certificate was only considered as revoked if 517 its revocationDate was in the past according to the local clock if 518 available. In particular, on builds without MBEDTLS_HAVE_TIME_DATE, 519 certificates were never considered as revoked. On builds with 520 MBEDTLS_HAVE_TIME_DATE, an attacker able to control the local clock (for 521 example, an untrusted OS attacking a secure enclave) could prevent 522 revocation of certificates via CRLs. Fixed by no longer checking the 523 revocationDate field, in accordance with RFC 5280. Reported by 524 yuemonangong in #3340. Reported independently and fixed by 525 Raoul Strackx and Jethro Beekman in #3433. 526 * In (D)TLS record decryption, when using a CBC ciphersuites without the 527 Encrypt-then-Mac extension, use constant code flow memory access patterns 528 to extract and check the MAC. This is an improvement to the existing 529 countermeasure against Lucky 13 attacks. The previous countermeasure was 530 effective against network-based attackers, but less so against local 531 attackers. The new countermeasure defends against local attackers, even 532 if they have access to fine-grained measurements. In particular, this 533 fixes a local Lucky 13 cache attack found and reported by Tuba Yavuz, 534 Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler 535 (University of Florida) and Dave Tian (Purdue University). 536 * Fix side channel in RSA private key operations and static (finite-field) 537 Diffie-Hellman. An adversary with precise enough timing and memory access 538 information (typically an untrusted operating system attacking a secure 539 enclave) could bypass an existing counter-measure (base blinding) and 540 potentially fully recover the private key. 541 * Fix a 1-byte buffer overread in mbedtls_x509_crl_parse_der(). 542 Credit to OSS-Fuzz for detecting the problem and to Philippe Antoine 543 for pinpointing the problematic code. 544 * Zeroising of plaintext buffers in mbedtls_ssl_read() to erase unused 545 application data from memory. Reported in #689 by 546 Johan Uppman Bruce of Sectra. 547 548Bugfix 549 * Library files installed after a CMake build no longer have execute 550 permission. 551 * Use local labels in mbedtls_padlock_has_support() to fix an invalid symbol 552 redefinition if the function is inlined. 553 Reported in #3451 and fix contributed in #3452 by okhowang. 554 * Fix the endianness of Curve25519 keys imported/exported through the PSA 555 APIs. psa_import_key and psa_export_key will now correctly expect/output 556 Montgomery keys in little-endian as defined by RFC7748. Contributed by 557 Steven Cooreman in #3425. 558 * Fix build errors when the only enabled elliptic curves are Montgomery 559 curves. Raised by signpainter in #941 and by Taiki-San in #1412. This 560 also fixes missing declarations reported by Steven Cooreman in #1147. 561 * Fix self-test failure when the only enabled short Weierstrass elliptic 562 curve is secp192k1. Fixes #2017. 563 * PSA key import will now correctly import a Curve25519/Curve448 public key 564 instead of erroring out. Contributed by Steven Cooreman in #3492. 565 * Use arc4random_buf on NetBSD instead of rand implementation with cyclical 566 lower bits. Fix contributed in #3540. 567 * Fix a memory leak in mbedtls_md_setup() when using HMAC under low memory 568 conditions. Reported and fix suggested by Guido Vranken in #3486. 569 * Fix bug in redirection of unit test outputs on platforms where stdout is 570 defined as a macro. First reported in #2311 and fix contributed in #3528. 571 572Changes 573 * Only pass -Wformat-signedness to versions of GCC that support it. Reported 574 in #3478 and fix contributed in #3479 by okhowang. 575 * Reduce the stack consumption of mbedtls_x509write_csr_der() which 576 previously could lead to stack overflow on constrained devices. 577 Contributed by Doru Gucea and Simon Leet in #3464. 578 * Undefine the ASSERT macro before defining it locally, in case it is defined 579 in a platform header. Contributed by Abdelatif Guettouche in #3557. 580 * Update copyright notices to use Linux Foundation guidance. As a result, 581 the copyright of contributors other than Arm is now acknowledged, and the 582 years of publishing are no longer tracked in the source files. This also 583 eliminates the need for the lines declaring the files to be part of 584 MbedTLS. Fixes #3457. 585 * Add the command line parameter key_pwd to the ssl_client2 and ssl_server2 586 example applications which allows to provide a password for the key file 587 specified through the existing key_file argument. This allows the use of 588 these applications with password-protected key files. Analogously but for 589 ssl_server2 only, add the command line parameter key_pwd2 which allows to 590 set a password for the key file provided through the existing key_file2 591 argument. 592 593= mbed TLS 2.23.0 branch released 2020-07-01 594 595Default behavior changes 596 * In the experimental PSA secure element interface, change the encoding of 597 key lifetimes to encode a persistence level and the location. Although C 598 prototypes do not effectively change, code calling 599 psa_register_se_driver() must be modified to pass the driver's location 600 instead of the keys' lifetime. If the library is upgraded on an existing 601 device, keys created with the old lifetime value will not be readable or 602 removable through Mbed TLS after the upgrade. 603 604Features 605 * New functions in the error module return constant strings for 606 high- and low-level error codes, complementing mbedtls_strerror() 607 which constructs a string for any error code, including compound 608 ones, but requires a writable buffer. Contributed by Gaurav Aggarwal 609 in #3176. 610 * The new utility programs/ssl/ssl_context_info prints a human-readable 611 dump of an SSL context saved with mbedtls_ssl_context_save(). 612 * Add support for midipix, a POSIX layer for Microsoft Windows. 613 * Add new mbedtls_x509_crt_parse_der_with_ext_cb() routine which allows 614 parsing unsupported certificate extensions via user provided callback. 615 Contributed by Nicola Di Lieto <nicola.dilieto@gmail.com> in #3243 as 616 a solution to #3241. 617 * Pass the "certificate policies" extension to the callback supplied to 618 mbedtls_x509_crt_parse_der_with_ext_cb() if it contains unsupported 619 policies (#3419). 620 * Added support to entropy_poll for the kern.arandom syscall supported on 621 some BSD systems. Contributed by Nia Alarie in #3423. 622 * Add support for Windows 2000 in net_sockets. Contributed by opatomic. #3239 623 624Security 625 * Fix a side channel vulnerability in modular exponentiation that could 626 reveal an RSA private key used in a secure enclave. Noticed by Sangho Lee, 627 Ming-Wei Shih, Prasun Gera, Taesoo Kim and Hyesoon Kim (Georgia Institute 628 of Technology); and Marcus Peinado (Microsoft Research). Reported by Raoul 629 Strackx (Fortanix) in #3394. 630 * Fix side channel in mbedtls_ecp_check_pub_priv() and 631 mbedtls_pk_parse_key() / mbedtls_pk_parse_keyfile() (when loading a 632 private key that didn't include the uncompressed public key), as well as 633 mbedtls_ecp_mul() / mbedtls_ecp_mul_restartable() when called with a NULL 634 f_rng argument. An attacker with access to precise enough timing and 635 memory access information (typically an untrusted operating system 636 attacking a secure enclave) could fully recover the ECC private key. 637 Found and reported by Alejandro Cabrera Aldaya and Billy Brumley. 638 * Fix issue in Lucky 13 counter-measure that could make it ineffective when 639 hardware accelerators were used (using one of the MBEDTLS_SHAxxx_ALT 640 macros). This would cause the original Lucky 13 attack to be possible in 641 those configurations, allowing an active network attacker to recover 642 plaintext after repeated timing measurements under some conditions. 643 Reported and fix suggested by Luc Perneel in #3246. 644 645Bugfix 646 * Fix the Visual Studio Release x64 build configuration for mbedtls itself. 647 Completes a previous fix in Mbed TLS 2.19 that only fixed the build for 648 the example programs. Reported in #1430 and fix contributed by irwir. 649 * Fix undefined behavior in X.509 certificate parsing if the 650 pathLenConstraint basic constraint value is equal to INT_MAX. 651 The actual effect with almost every compiler is the intended 652 behavior, so this is unlikely to be exploitable anywhere. #3192 653 * Fix issue with a detected HW accelerated record error not being exposed 654 due to shadowed variable. Contributed by Sander Visser in #3310. 655 * Avoid NULL pointer dereferencing if mbedtls_ssl_free() is called with a 656 NULL pointer argument. Contributed by Sander Visser in #3312. 657 * Fix potential linker errors on dual world platforms by inlining 658 mbedtls_gcc_group_to_psa(). This allows the pk.c module to link separately 659 from psa_crypto.c. Fixes #3300. 660 * Remove dead code in X.509 certificate parsing. Contributed by irwir in 661 #2855. 662 * Include asn1.h in error.c. Fixes #3328 reported by David Hu. 663 * Fix potential memory leaks in ecp_randomize_jac() and ecp_randomize_mxz() 664 when PRNG function fails. Contributed by Jonas Lejeune in #3318. 665 * Remove unused macros from MSVC projects. Reported in #3297 and fix 666 submitted in #3333 by irwir. 667 * Add additional bounds checks in ssl_write_client_hello() preventing 668 output buffer overflow if the configuration declared a buffer that was 669 too small. 670 * Set _POSIX_C_SOURCE to at least 200112L in C99 code. Reported in #3420 and 671 fix submitted in #3421 by Nia Alarie. 672 * Fix building library/net_sockets.c and the ssl_mail_client program on 673 NetBSD. Contributed by Nia Alarie in #3422. 674 * Fix false positive uninitialised variable reported by cpp-check. 675 Contributed by Sander Visser in #3311. 676 * Update iv and len context pointers manually when reallocating buffers 677 using the MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH feature. This caused issues 678 when receiving a connection with CID, when these fields were shifted 679 in ssl_parse_record_header(). 680 681Changes 682 * Fix warnings about signedness issues in format strings. The build is now 683 clean of -Wformat-signedness warnings. Contributed by Kenneth Soerensen 684 in #3153. 685 * Fix minor performance issue in operations on Curve25519 caused by using a 686 suboptimal modular reduction in one place. Found and fix contributed by 687 Aurelien Jarno in #3209. 688 * Combine identical cases in switch statements in md.c. Contributed 689 by irwir in #3208. 690 * Simplify a bounds check in ssl_write_certificate_request(). Contributed 691 by irwir in #3150. 692 * Unify the example programs termination to call mbedtls_exit() instead of 693 using a return command. This has been done to enable customization of the 694 behavior in bare metal environments. 695 * Fix mbedtls_x509_dn_gets to escape non-ASCII characters as "?". 696 Contributed by Koh M. Nakagawa in #3326. 697 * Use FindPython3 when cmake version >= 3.15.0 698 * Abort the ClientHello writing function as soon as some extension doesn't 699 fit into the record buffer. Previously, such extensions were silently 700 dropped. As a consequence, the TLS handshake now fails when the output 701 buffer is not large enough to hold the ClientHello. 702 * The unit tests now rely on header files in tests/include/test and source 703 files in tests/src. When building with make or cmake, the files in 704 tests/src are compiled and the resulting object linked into each test 705 executable. 706 * The ECP module, enabled by `MBEDTLS_ECP_C`, now depends on 707 `MBEDTLS_CTR_DRBG_C` or `MBEDTLS_HMAC_DRBG_C` for some side-channel 708 coutermeasures. If side channels are not a concern, this dependency can 709 be avoided by enabling the new option `MBEDTLS_ECP_NO_INTERNAL_RNG`. 710 * Align MSVC error flag with GCC and Clang. Contributed by Carlos Gomes 711 Martinho. #3147 712 * Remove superfluous assignment in mbedtls_ssl_parse_certificate(). Reported 713 in #3182 and fix submitted by irwir. #3217 714 * Fix typo in XTS tests. Reported and fix submitted by Kxuan. #3319 715 716= mbed TLS 2.22.0 branch released 2020-04-14 717 718New deprecations 719 * Deprecate MBEDTLS_SSL_HW_RECORD_ACCEL that enables function hooks in the 720 SSL module for hardware acceleration of individual records. 721 * Deprecate mbedtls_ssl_get_max_frag_len() in favour of 722 mbedtls_ssl_get_output_max_frag_len() and 723 mbedtls_ssl_get_input_max_frag_len() to be more precise about which max 724 fragment length is desired. 725 726Security 727 * Fix issue in DTLS handling of new associations with the same parameters 728 (RFC 6347 section 4.2.8): an attacker able to send forged UDP packets to 729 the server could cause it to drop established associations with 730 legitimate clients, resulting in a Denial of Service. This could only 731 happen when MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE was enabled in config.h 732 (which it is by default). 733 * Fix side channel in ECC code that allowed an adversary with access to 734 precise enough timing and memory access information (typically an 735 untrusted operating system attacking a secure enclave) to fully recover 736 an ECDSA private key. Found and reported by Alejandro Cabrera Aldaya, 737 Billy Brumley and Cesar Pereida Garcia. CVE-2020-10932 738 * Fix a potentially remotely exploitable buffer overread in a 739 DTLS client when parsing the Hello Verify Request message. 740 741Features 742 * The new build option MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH automatically 743 resizes the I/O buffers before and after handshakes, reducing the memory 744 consumption during application data transfer. 745 746Bugfix 747 * Fix compilation failure when both MBEDTLS_SSL_PROTO_DTLS and 748 MBEDTLS_SSL_HW_RECORD_ACCEL are enabled. 749 * Remove a spurious check in ssl_parse_client_psk_identity that triggered 750 a warning with some compilers. Fix contributed by irwir in #2856. 751 * Fix a function name in a debug message. Contributed by Ercan Ozturk in 752 #3013. 753 754Changes 755 * Mbed Crypto is no longer a Git submodule. The crypto part of the library 756 is back directly in the present repository. 757 * Split mbedtls_ssl_get_max_frag_len() into 758 mbedtls_ssl_get_output_max_frag_len() and 759 mbedtls_ssl_get_input_max_frag_len() to ensure that a sufficient input 760 buffer is allocated by the server (if MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH 761 is defined), regardless of what MFL was configured for it. 762 763= mbed TLS 2.21.0 branch released 2020-02-20 764 765New deprecations 766 * Deprecate MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO that enables parsing 767 SSLv2 ClientHello messages. 768 * Deprecate MBEDTLS_SSL_PROTO_SSL3 that enables support for SSLv3. 769 * Deprecate for MBEDTLS_PKCS11_C, the wrapper around the pkcs11-helper 770 library which allows TLS authentication to use keys stored in a 771 PKCS#11 token such as a smartcard. 772 773Security 774 * Fix potential memory overread when performing an ECDSA signature 775 operation. The overread only happens with cryptographically low 776 probability (of the order of 2^-n where n is the bitsize of the curve) 777 unless the RNG is broken, and could result in information disclosure or 778 denial of service (application crash or extra resource consumption). 779 Found by Auke Zeilstra and Peter Schwabe, using static analysis. 780 * To avoid a side channel vulnerability when parsing an RSA private key, 781 read all the CRT parameters from the DER structure rather than 782 reconstructing them. Found by Alejandro Cabrera Aldaya and Billy Bob 783 Brumley. Reported and fix contributed by Jack Lloyd. 784 ARMmbed/mbed-crypto#352 785 786Features 787 * The new build option MBEDTLS_SHA512_NO_SHA384 allows building SHA-512 788 support without SHA-384. 789 790API changes 791 * Change the encoding of key types and curves in the PSA API. The new 792 values are aligned with the upcoming release of the PSA Crypto API 793 specification version 1.0.0. The main change which may break some 794 existing code is that elliptic curve key types no longer encode the 795 exact curve: a psa_ecc_curve_t or psa_key_type_t value only encodes 796 a curve family and the key size determines the exact curve (for example, 797 PSA_ECC_CURVE_SECP_R1 with 256 bits is P256R1). ARMmbed/mbed-crypto#330 798 799Bugfix 800 * Fix an unchecked call to mbedtls_md() in the x509write module. 801 * Fix build failure with MBEDTLS_ZLIB_SUPPORT enabled. Reported by 802 Jack Lloyd in #2859. Fix submitted by jiblime in #2963. 803 * Fix some false-positive uninitialized variable warnings in X.509. Fix 804 contributed by apple-ihack-geek in #2663. 805 * Fix a possible error code mangling in psa_mac_verify_finish() when 806 a cryptographic accelerator fails. ARMmbed/mbed-crypto#345 807 * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some 808 RSA keys that would later be rejected by functions expecting private 809 keys. Found by Catena cyber using oss-fuzz (issue 20467). 810 * Fix a bug in mbedtls_pk_parse_key() that would cause it to 811 accept some RSA keys with invalid values by silently fixing those values. 812 813= mbed TLS 2.20.0 branch released 2020-01-15 814 815Default behavior changes 816 * The initial seeding of a CTR_DRBG instance makes a second call to the 817 entropy function to obtain entropy for a nonce if the entropy size is less 818 than 3/2 times the key size. In case you want to disable the extra call to 819 grab entropy, you can call mbedtls_ctr_drbg_set_nonce_len() to force the 820 nonce length to 0. 821 822Security 823 * Enforce that mbedtls_entropy_func() gathers a total of 824 MBEDTLS_ENTROPY_BLOCK_SIZE bytes or more from strong sources. In the 825 default configuration, on a platform with a single entropy source, the 826 entropy module formerly only grabbed 32 bytes, which is good enough for 827 security if the source is genuinely strong, but less than the expected 64 828 bytes (size of the entropy accumulator). 829 * Zeroize local variables in mbedtls_internal_aes_encrypt() and 830 mbedtls_internal_aes_decrypt() before exiting the function. The value of 831 these variables can be used to recover the last round key. To follow best 832 practice and to limit the impact of buffer overread vulnerabilities (like 833 Heartbleed) we need to zeroize them before exiting the function. 834 Issue reported by Tuba Yavuz, Farhaan Fowze, Ken (Yihang) Bai, 835 Grant Hernandez, and Kevin Butler (University of Florida) and 836 Dave Tian (Purdue University). 837 * Fix side channel vulnerability in ECDSA. Our bignum implementation is not 838 constant time/constant trace, so side channel attacks can retrieve the 839 blinded value, factor it (as it is smaller than RSA keys and not guaranteed 840 to have only large prime factors), and then, by brute force, recover the 841 key. Reported by Alejandro Cabrera Aldaya and Billy Brumley. 842 * Fix side channel vulnerability in ECDSA key generation. Obtaining precise 843 timings on the comparison in the key generation enabled the attacker to 844 learn leading bits of the ephemeral key used during ECDSA signatures and to 845 recover the private key. Reported by Jeremy Dubeuf. 846 * Catch failure of AES functions in mbedtls_ctr_drbg_random(). Uncaught 847 failures could happen with alternative implementations of AES. Bug 848 reported and fix proposed by Johan Uppman Bruce and Christoffer Lauri, 849 Sectra. 850 851Features 852 * Key derivation inputs in the PSA API can now either come from a key object 853 or from a buffer regardless of the step type. 854 * The CTR_DRBG module can grab a nonce from the entropy source during the 855 initial seeding. The default nonce length is chosen based on the key size 856 to achieve the security strength defined by NIST SP 800-90A. You can 857 change it with mbedtls_ctr_drbg_set_nonce_len(). 858 * Add ENUMERATED tag support to the ASN.1 module. Contributed by 859 msopiha-linaro in ARMmbed/mbed-crypto#307. 860 861API changes 862 * In the PSA API, forbid zero-length keys. To pass a zero-length input to a 863 key derivation function, use a buffer instead (this is now always 864 possible). 865 * Rename psa_asymmetric_sign() to psa_sign_hash() and 866 psa_asymmetric_verify() to psa_verify_hash(). 867 868Bugfix 869 * Fix an incorrect size in a debugging message. Reported and fix 870 submitted by irwir. Fixes #2717. 871 * Fix an unused variable warning when compiling without DTLS. 872 Reported and fix submitted by irwir. Fixes #2800. 873 * Remove a useless assignment. Reported and fix submitted by irwir. 874 Fixes #2801. 875 * Fix a buffer overflow in the PSA HMAC code when using a long key with an 876 unsupported algorithm. Fixes ARMmbed/mbed-crypto#254. 877 * Fix mbedtls_asn1_get_int to support any number of leading zeros. Credit 878 to OSS-Fuzz for finding a bug in an intermediate version of the fix. 879 * Fix mbedtls_asn1_get_bitstring_null to correctly parse bitstrings of at 880 most 2 bytes. 881 * mbedtls_ctr_drbg_set_entropy_len() and 882 mbedtls_hmac_drbg_set_entropy_len() now work if you call them before 883 mbedtls_ctr_drbg_seed() or mbedtls_hmac_drbg_seed(). 884 885Changes 886 * Remove the technical possibility to define custom mbedtls_md_info 887 structures, which was exposed only in an internal header. 888 * psa_close_key(0) and psa_destroy_key(0) now succeed (doing nothing, as 889 before). 890 * Variables containing error codes are now initialized to an error code 891 rather than success, so that coding mistakes or memory corruption tends to 892 cause functions to return this error code rather than a success. There are 893 no known instances where this changes the behavior of the library: this is 894 merely a robustness improvement. ARMmbed/mbed-crypto#323 895 * Remove a useless call to mbedtls_ecp_group_free(). Contributed by 896 Alexander Krizhanovsky in ARMmbed/mbed-crypto#210. 897 * Speed up PBKDF2 by caching the digest calculation. Contributed by Jack 898 Lloyd and Fortanix Inc in ARMmbed/mbed-crypto#277. 899 * Small performance improvement of mbedtls_mpi_div_mpi(). Contributed by 900 Alexander Krizhanovsky in ARMmbed/mbed-crypto#308. 901 902= mbed TLS 2.19.1 branch released 2019-09-16 903 904Features 905 * Declare include headers as PUBLIC to propagate to CMake project consumers 906 Contributed by Zachary J. Fields in PR #2949. 907 * Add nss_keylog to ssl_client2 and ssl_server2, enabling easier analysis of 908 TLS sessions with tools like Wireshark. 909 910API Changes 911 * Make client_random and server_random const in 912 mbedtls_ssl_export_keys_ext_t, so that the key exporter is discouraged 913 from modifying the client/server hello. 914 915Bugfix 916 * Fix some false-positive uninitialized variable warnings in crypto. Fix 917 contributed by apple-ihack-geek in #2663. 918 919= mbed TLS 2.19.0 branch released 2019-09-06 920 921Security 922 * Fix a missing error detection in ECJPAKE. This could have caused a 923 predictable shared secret if a hardware accelerator failed and the other 924 side of the key exchange had a similar bug. 925 * When writing a private EC key, use a constant size for the private 926 value, as specified in RFC 5915. Previously, the value was written 927 as an ASN.1 INTEGER, which caused the size of the key to leak 928 about 1 bit of information on average and could cause the value to be 929 1 byte too large for the output buffer. 930 * The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to 931 implement blinding. Because of this for the same key and message the same 932 blinding value was generated. This reduced the effectiveness of the 933 countermeasure and leaked information about the private key through side 934 channels. Reported by Jack Lloyd. 935 936Features 937 * Add new API functions mbedtls_ssl_session_save() and 938 mbedtls_ssl_session_load() to allow serializing a session, for example to 939 store it in non-volatile storage, and later using it for TLS session 940 resumption. 941 * Add a new API function mbedtls_ssl_check_record() to allow checking that 942 an incoming record is valid, authentic and has not been seen before. This 943 feature can be used alongside Connection ID and SSL context serialisation. 944 The feature is enabled at compile-time by MBEDTLS_SSL_RECORD_CHECKING 945 option. 946 * New implementation of X25519 (ECDH using Curve25519) from Project Everest 947 (https://project-everest.github.io/). It can be enabled at compile time 948 with MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED. This implementation is formally 949 verified and significantly faster, but is only supported on x86 platforms 950 (32-bit and 64-bit) using GCC, Clang or Visual Studio. Contributed by 951 Christoph Wintersteiger from Microsoft Research. 952 * Add mbedtls_net_close(), enabling the building of forking servers where 953 the parent process closes the client socket and continue accepting, and 954 the child process closes the listening socket and handles the client 955 socket. Contributed by Robert Larsen in #2803. 956 957API Changes 958 * Add DER-encoded test CRTs to library/certs.c, allowing 959 the example programs ssl_server2 and ssl_client2 to be run 960 if MBEDTLS_FS_IO and MBEDTLS_PEM_PARSE_C are unset. Fixes #2254. 961 * The HAVEGE state type now uses uint32_t elements instead of int. 962 * The functions mbedtls_ecp_curve_list() and mbedtls_ecp_grp_id_list() now 963 list all curves for which at least one of ECDH or ECDSA is supported, not 964 just curves for which both are supported. Call mbedtls_ecdsa_can_do() or 965 mbedtls_ecdh_can_do() on each result to check whether each algorithm is 966 supported. 967 * The new function mbedtls_ecdsa_sign_det_ext() is similar to 968 mbedtls_ecdsa_sign_det() but allows passing an external RNG for the 969 purpose of blinding. 970 971New deprecations 972 * Deprecate mbedtls_ecdsa_sign_det() in favor of a functions that can take an 973 RNG function as an input. 974 * Calling mbedtls_ecdsa_write_signature() with NULL as the f_rng argument 975 is now deprecated. 976 977Bugfix 978 * Fix missing bounds checks in X.509 parsing functions that could 979 lead to successful parsing of ill-formed X.509 CRTs. Fixes #2437. 980 * Fix multiple X.509 functions previously returning ASN.1 low-level error 981 codes to always wrap these codes into X.509 high level error codes before 982 returning. Fixes #2431. 983 * Fix to allow building test suites with any warning that detects unused 984 functions. Fixes #1628. 985 * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture. 986 * Remove redundant include file in timing.c. Fixes #2640 reported by irwir. 987 * Fix build failure when building with mingw on Windows by including 988 stdarg.h where needed. Fixes #2656. 989 * Fix Visual Studio Release x64 build configuration by inheriting 990 PlatformToolset from the project configuration. Fixes #1430 reported by 991 irwir. 992 * Enable Suite B with subset of ECP curves. Make sure the code compiles even 993 if some curves are not defined. Fixes #1591 reported by dbedev. 994 * Fix misuse of signed arithmetic in the HAVEGE module. #2598 995 * Avoid use of statically sized stack buffers for certificate writing. 996 This previously limited the maximum size of DER encoded certificates 997 in mbedtls_x509write_crt_der() to 2Kb. Reported by soccerGB in #2631. 998 * Fix partial zeroing in x509_get_other_name. Found and fixed by ekse, #2716. 999 * Update test certificates that were about to expire. Reported by 1000 Bernhard M. Wiedemann in #2357. 1001 * Fix the build on ARMv5TE in ARM mode to not use assembly instructions 1002 that are only available in Thumb mode. Fix contributed by Aurelien Jarno 1003 in #2169. 1004 * Fix propagation of restart contexts in restartable EC operations. 1005 This could previously lead to segmentation faults in builds using an 1006 address-sanitizer and enabling but not using MBEDTLS_ECP_RESTARTABLE. 1007 * Fix memory leak in in mpi_miller_rabin(). Contributed by 1008 Jens Wiklander <jens.wiklander@linaro.org> in #2363 1009 * Improve code clarity in x509_crt module, removing false-positive 1010 uninitialized variable warnings on some recent toolchains (GCC8, etc). 1011 Discovered and fixed by Andy Gross (Linaro), #2392. 1012 * Fix bug in endianness conversion in bignum module. This lead to 1013 functionally incorrect code on bigendian systems which don't have 1014 __BYTE_ORDER__ defined. Reported by Brendan Shanks. Fixes #2622. 1015 1016Changes 1017 * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821. 1018 * Make it easier to define MBEDTLS_PARAM_FAILED as assert (which config.h 1019 suggests). #2671 1020 * Make `make clean` clean all programs always. Fixes #1862. 1021 * Add a Dockerfile and helper scripts (all-in-docker.sh, basic-in-docker.sh, 1022 docker-env.sh) to simplify running test suites on a Linux host. Contributed 1023 by Peter Kolbus (Garmin). 1024 * Add `reproducible` option to `ssl_client2` and `ssl_server2` to enable 1025 test runs without variability. Contributed by Philippe Antoine (Catena 1026 cyber) in #2681. 1027 * Extended .gitignore to ignore Visual Studio artifacts. Fixed by ConfusedSushi. 1028 * Adds fuzz targets, especially for continuous fuzzing with OSS-Fuzz. 1029 Contributed by Philippe Antoine (Catena cyber). 1030 * Remove the crypto part of the library from Mbed TLS. The crypto 1031 code and tests are now only available via Mbed Crypto, which 1032 Mbed TLS references as a Git submodule. 1033 1034= mbed TLS 2.18.1 branch released 2019-07-12 1035 1036Bugfix 1037 * Fix build failure when building with mingw on Windows by including 1038 stdarg.h where needed. Fixes #2656. 1039 1040Changes 1041 * Enable building of Mbed TLS as a CMake subproject. Suggested and fixed by 1042 Ashley Duncan in #2609. 1043 1044= mbed TLS 2.18.0 branch released 2019-06-11 1045 1046Features 1047 * Add the Any Policy certificate policy oid, as defined in 1048 rfc 5280 section 4.2.1.4. 1049 * It is now possible to use NIST key wrap mode via the mbedtls_cipher API. 1050 Contributed by Jack Lloyd and Fortanix Inc. 1051 * Add the Wi-SUN Field Area Network (FAN) device extended key usage. 1052 * Add the oid certificate policy x509 extension. 1053 * It is now possible to perform RSA PKCS v1.5 signatures with RIPEMD-160 digest. 1054 Contributed by Jack Lloyd and Fortanix Inc. 1055 * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes, 1056 and the used tls-prf. 1057 * Add public API for tls-prf function, according to requested enum. 1058 * Add support for parsing otherName entries in the Subject Alternative Name 1059 X.509 certificate extension, specifically type hardware module name, 1060 as defined in RFC 4108 section 5. 1061 * Add support for parsing certificate policies extension, as defined in 1062 RFC 5280 section 4.2.1.4. Currently, only the "Any Policy" policy is 1063 supported. 1064 * List all SAN types in the subject_alt_names field of the certificate. 1065 Resolves #459. 1066 * Add support for draft-05 of the Connection ID extension, as specified 1067 in https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05. 1068 The Connection ID extension allows to keep DTLS connections beyond the 1069 lifetime of the underlying transport by adding a connection identifier 1070 to the DTLS record header. This identifier can be used to associated an 1071 incoming record with the correct connection data even after the peer has 1072 changed its IP or port. The feature is enabled at compile-time by setting 1073 MBEDTLS_SSL_DTLS_CONNECTION_ID (disabled by default), and at run-time 1074 through the new APIs mbedtls_ssl_conf_cid() and mbedtls_ssl_set_cid(). 1075 1076 1077API Changes 1078 * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes, 1079 and the used tls-prf. 1080 * Add public API for tls-prf function, according to requested enum. 1081 1082Bugfix 1083 * Fix private key DER output in the key_app_writer example. File contents 1084 were shifted by one byte, creating an invalid ASN.1 tag. Fixed by 1085 Christian Walther in #2239. 1086 * Fix potential memory leak in X.509 self test. Found and fixed by 1087 Junhwan Park, #2106. 1088 * Reduce stack usage of hkdf tests. Fixes #2195. 1089 * Fix 1-byte buffer overflow in mbedtls_mpi_write_string() when 1090 used with negative inputs. Found by Guido Vranken in #2404. Credit to 1091 OSS-Fuzz. 1092 * Fix bugs in the AEAD test suite which would be exposed by ciphers which 1093 either used both encrypt and decrypt key schedules, or which perform padding. 1094 GCM and CCM were not affected. Fixed by Jack Lloyd. 1095 * Fix incorrect default port number in ssl_mail_client example's usage. 1096 Found and fixed by irwir. #2337 1097 * Add psa_util.h to test/cpp_dummy_build to fix build_default_make_gcc_and_cxx. 1098 Fixed by Peter Kolbus (Garmin). #2579 1099 * Add missing parentheses around parameters in the definition of the 1100 public macro MBEDTLS_X509_ID_FLAG. This could lead to invalid evaluation 1101 in case operators binding less strongly than subtraction were used 1102 for the parameter. 1103 * Add a check for MBEDTLS_X509_CRL_PARSE_C in ssl_server2, guarding the crl 1104 sni entry parameter. Reported by inestlerode in #560. 1105 * Set the next sequence of the subject_alt_name to NULL when deleting 1106 sequence on failure. Found and fix suggested by Philippe Antoine. 1107 Credit to OSS-Fuzz. 1108 1109Changes 1110 * Server's RSA certificate in certs.c was SHA-1 signed. In the default 1111 mbedTLS configuration only SHA-2 signed certificates are accepted. 1112 This certificate is used in the demo server programs, which lead the 1113 client programs to fail at the peer's certificate verification 1114 due to an unacceptable hash signature. The certificate has been 1115 updated to one that is SHA-256 signed. Fix contributed by 1116 Illya Gerasymchuk. 1117 * Return from various debugging routines immediately if the 1118 provided SSL context is unset. 1119 * Remove dead code from bignum.c in the default configuration. 1120 Found by Coverity, reported and fixed by Peter Kolbus (Garmin). Fixes #2309. 1121 * Add test for minimal value of MBEDTLS_MPI_WINDOW_SIZE to all.sh. 1122 Contributed by Peter Kolbus (Garmin). 1123 * Change wording in the `mbedtls_ssl_conf_max_frag_len()`'s documentation to 1124 improve clarity. Fixes #2258. 1125 1126= mbed TLS 2.17.0 branch released 2019-03-19 1127 1128Features 1129 * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()` 1130 which allows copy-less parsing of DER encoded X.509 CRTs, 1131 at the cost of additional lifetime constraints on the input 1132 buffer, but at the benefit of reduced RAM consumption. 1133 * Add a new function mbedtls_asn1_write_named_bitstring() to write ASN.1 1134 named bitstring in DER as required by RFC 5280 Appendix B. 1135 * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites 1136 from the default list (enabled by default). See 1137 https://sweet32.info/SWEET32_CCS16.pdf. 1138 1139API Changes 1140 * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`. 1141 See the Features section for more information. 1142 * Allow to opt in to the removal the API mbedtls_ssl_get_peer_cert() 1143 for the benefit of saving RAM, by disabling the new compile-time 1144 option MBEDTLS_SSL_KEEP_PEER_CERTIFICATE (enabled by default for 1145 API stability). Disabling this option makes mbedtls_ssl_get_peer_cert() 1146 always return NULL, and removes the peer_cert field from the 1147 mbedtls_ssl_session structure which otherwise stores the peer's 1148 certificate. 1149 1150Security 1151 * Make mbedtls_ecdh_get_params return an error if the second key 1152 belongs to a different group from the first. Before, if an application 1153 passed keys that belonged to different group, the first key's data was 1154 interpreted according to the second group, which could lead to either 1155 an error or a meaningless output from mbedtls_ecdh_get_params. In the 1156 latter case, this could expose at most 5 bits of the private key. 1157 1158Bugfix 1159 * Fix a compilation issue with mbedtls_ecp_restart_ctx not being defined 1160 when MBEDTLS_ECP_ALT is defined. Reported by jwhui. Fixes #2242. 1161 * Run the AD too long test only if MBEDTLS_CCM_ALT is not defined. 1162 Raised as a comment in #1996. 1163 * Reduce the stack consumption of mbedtls_mpi_fill_random() which could 1164 previously lead to a stack overflow on constrained targets. 1165 * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions 1166 in the header files, which missed the precompilation check. #971 1167 * Fix returning the value 1 when mbedtls_ecdsa_genkey failed. 1168 * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326. 1169 * Remove the mbedtls namespacing from the header file, to fix a "file not found" 1170 build error. Fixed by Haijun Gu #2319. 1171 * Fix signed-to-unsigned integer conversion warning 1172 in X.509 module. Fixes #2212. 1173 * Reduce stack usage of `mpi_write_hlp()` by eliminating recursion. 1174 Fixes #2190. 1175 * Fix false failure in all.sh when backup files exist in include/mbedtls 1176 (e.g. config.h.bak). Fixed by Peter Kolbus (Garmin) #2407. 1177 * Ensure that unused bits are zero when writing ASN.1 bitstrings when using 1178 mbedtls_asn1_write_bitstring(). 1179 * Fix issue when writing the named bitstrings in KeyUsage and NsCertType 1180 extensions in CSRs and CRTs that caused these bitstrings to not be encoded 1181 correctly as trailing zeroes were not accounted for as unused bits in the 1182 leading content octet. Fixes #1610. 1183 1184Changes 1185 * Reduce RAM consumption during session renegotiation by not storing 1186 the peer CRT chain and session ticket twice. 1187 * Include configuration file in all header files that use configuration, 1188 instead of relying on other header files that they include. 1189 Inserted as an enhancement for #1371 1190 * Add support for alternative CSR headers, as used by Microsoft and defined 1191 in RFC 7468. Found by Michael Ernst. Fixes #767. 1192 * Correct many misspellings. Fixed by MisterDA #2371. 1193 * Provide an abstraction of vsnprintf to allow alternative implementations 1194 for platforms that don't provide it. Based on contributions by Joris Aerts 1195 and Nathaniel Wesley Filardo. 1196 * Fix clobber list in MIPS assembly for large integer multiplication. 1197 Previously, this could lead to functionally incorrect assembly being 1198 produced by some optimizing compilers, showing up as failures in 1199 e.g. RSA or ECC signature operations. Reported in #1722, fix suggested 1200 by Aurelien Jarno and submitted by Jeffrey Martin. 1201 * Reduce the complexity of the timing tests. They were assuming more than the 1202 underlying OS actually guarantees. 1203 * Fix configuration queries in ssl-opt.h. #2030 1204 * Ensure that ssl-opt.h can be run in OS X. #2029 1205 * Re-enable certain interoperability tests in ssl-opt.sh which had previously 1206 been disabled for lack of a sufficiently recent version of GnuTLS on the CI. 1207 * Ciphersuites based on 3DES now have the lowest priority by default when 1208 they are enabled. 1209 1210= mbed TLS 2.16.0 branch released 2018-12-21 1211 1212Features 1213 * Add a new config.h option of MBEDTLS_CHECK_PARAMS that enables validation 1214 of parameters in the API. This allows detection of obvious misuses of the 1215 API, such as passing NULL pointers. The API of existing functions hasn't 1216 changed, but requirements on parameters have been made more explicit in 1217 the documentation. See the corresponding API documentation for each 1218 function to see for which parameter values it is defined. This feature is 1219 disabled by default. See its API documentation in config.h for additional 1220 steps you have to take when enabling it. 1221 1222API Changes 1223 * The following functions in the random generator modules have been 1224 deprecated and replaced as shown below. The new functions change 1225 the return type from void to int to allow returning error codes when 1226 using MBEDTLS_<MODULE>_ALT for the underlying AES or message digest 1227 primitive. Fixes #1798. 1228 mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret() 1229 mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret() 1230 * Extend ECDH interface to enable alternative implementations. 1231 * Deprecate error codes of the form MBEDTLS_ERR_xxx_INVALID_KEY_LENGTH for 1232 ARIA, CAMELLIA and Blowfish. These error codes will be replaced by 1233 the more generic per-module error codes MBEDTLS_ERR_xxx_BAD_INPUT_DATA. 1234 * Additional parameter validation checks have been added for the following 1235 modules - AES, ARIA, Blowfish, CAMELLIA, CCM, GCM, DHM, ECP, ECDSA, ECDH, 1236 ECJPAKE, SHA, Chacha20 and Poly1305, cipher, pk, RSA, and MPI. 1237 Where modules have had parameter validation added, existing parameter 1238 checks may have changed. Some modules, such as Chacha20 had existing 1239 parameter validation whereas other modules had little. This has now been 1240 changed so that the same level of validation is present in all modules, and 1241 that it is now optional with the MBEDTLS_CHECK_PARAMS flag which by default 1242 is off. That means that checks which were previously present by default 1243 will no longer be. 1244 1245New deprecations 1246 * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update 1247 in favor of functions that can return an error code. 1248 1249Bugfix 1250 * Fix for Clang, which was reporting a warning for the bignum.c inline 1251 assembly for AMD64 targets creating string literals greater than those 1252 permitted by the ISO C99 standard. Found by Aaron Jones. Fixes #482. 1253 * Fix runtime error in `mbedtls_platform_entropy_poll()` when run 1254 through qemu user emulation. Reported and fix suggested by randombit 1255 in #1212. Fixes #1212. 1256 * Fix an unsafe bounds check when restoring an SSL session from a ticket. 1257 This could lead to a buffer overflow, but only in case ticket authentication 1258 was broken. Reported and fix suggested by Guido Vranken in #659. 1259 * Add explicit integer to enumeration type casts to example program 1260 programs/pkey/gen_key which previously led to compilation failure 1261 on some toolchains. Reported by phoenixmcallister. Fixes #2170. 1262 * Fix double initialization of ECC hardware that made some accelerators 1263 hang. 1264 * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence 1265 of check for certificate/key matching. Reported by Attila Molnar, #507. 1266 1267 = mbed TLS 2.15.1 branch released 2018-11-30 1268 1269 Changes 1270 * Update the Mbed Crypto submodule to version 0.1.0b2. 1271 1272 = mbed TLS 2.15.0 branch released 2018-11-23 1273 1274 Features 1275 * Add an experimental build option, USE_CRYPTO_SUBMODULE, to enable use of 1276 Mbed Crypto as the source of the cryptography implementation. 1277 * Add an experimental configuration option, MBEDTLS_PSA_CRYPTO_C, to enable 1278 the PSA Crypto API from Mbed Crypto when additionally used with the 1279 USE_CRYPTO_SUBMODULE build option. 1280 1281 Changes 1282 * Add unit tests for AES-GCM when called through mbedtls_cipher_auth_xxx() 1283 from the cipher abstraction layer. Fixes #2198. 1284 1285= mbed TLS 2.14.1 branch released 2018-11-30 1286 1287Security 1288 * Fix timing variations and memory access variations in RSA PKCS#1 v1.5 1289 decryption that could lead to a Bleichenbacher-style padding oracle 1290 attack. In TLS, this affects servers that accept ciphersuites based on 1291 RSA decryption (i.e. ciphersuites whose name contains RSA but not 1292 (EC)DH(E)). Discovered by Eyal Ronen (Weizmann Institute), Robert Gillham 1293 (University of Adelaide), Daniel Genkin (University of Michigan), 1294 Adi Shamir (Weizmann Institute), David Wong (NCC Group), and Yuval Yarom 1295 (University of Adelaide, Data61). The attack is described in more detail 1296 in the paper available here: http://cat.eyalro.net/cat.pdf CVE-2018-19608 1297 * In mbedtls_mpi_write_binary(), don't leak the exact size of the number 1298 via branching and memory access patterns. An attacker who could submit 1299 a plaintext for RSA PKCS#1 v1.5 decryption but only observe the timing 1300 of the decryption and not its result could nonetheless decrypt RSA 1301 plaintexts and forge RSA signatures. Other asymmetric algorithms may 1302 have been similarly vulnerable. Reported by Eyal Ronen, Robert Gillham, 1303 Daniel Genkin, Adi Shamir, David Wong and Yuval Yarom. 1304 * Wipe sensitive buffers on the stack in the CTR_DRBG and HMAC_DRBG 1305 modules. 1306 1307API Changes 1308 * The new functions mbedtls_ctr_drbg_update_ret() and 1309 mbedtls_hmac_drbg_update_ret() are similar to mbedtls_ctr_drbg_update() 1310 and mbedtls_hmac_drbg_update() respectively, but the new functions 1311 report errors whereas the old functions return void. We recommend that 1312 applications use the new functions. 1313 1314= mbed TLS 2.14.0 branch released 2018-11-19 1315 1316Security 1317 * Fix overly strict DN comparison when looking for CRLs belonging to a 1318 particular CA. This previously led to ignoring CRLs when the CRL's issuer 1319 name and the CA's subject name differed in their string encoding (e.g., 1320 one using PrintableString and the other UTF8String) or in the choice of 1321 upper and lower case. Reported by Henrik Andersson of Bosch GmbH in issue 1322 #1784. 1323 * Fix a flawed bounds check in server PSK hint parsing. In case the 1324 incoming message buffer was placed within the first 64KiB of address 1325 space and a PSK-(EC)DHE ciphersuite was used, this allowed an attacker 1326 to trigger a memory access up to 64KiB beyond the incoming message buffer, 1327 potentially leading to an application crash or information disclosure. 1328 * Fix mbedtls_mpi_is_prime() to use more rounds of probabilistic testing. The 1329 previous settings for the number of rounds made it practical for an 1330 adversary to construct non-primes that would be erroneously accepted as 1331 primes with high probability. This does not have an impact on the 1332 security of TLS, but can matter in other contexts with numbers chosen 1333 potentially by an adversary that should be prime and can be validated. 1334 For example, the number of rounds was enough to securely generate RSA key 1335 pairs or Diffie-Hellman parameters, but was insufficient to validate 1336 Diffie-Hellman parameters properly. 1337 See "Prime and Prejudice" by by Martin R. Albrecht and Jake Massimo and 1338 Kenneth G. Paterson and Juraj Somorovsky. 1339 1340Features 1341 * Add support for temporarily suspending expensive ECC computations after 1342 some configurable amount of operations. This is intended to be used in 1343 constrained, single-threaded systems where ECC is time consuming and can 1344 block other operations until they complete. This is disabled by default, 1345 but can be enabled by MBEDTLS_ECP_RESTARTABLE at compile time and 1346 configured by mbedtls_ecp_set_max_ops() at runtime. It applies to the new 1347 xxx_restartable functions in ECP, ECDSA, PK and X.509 (CRL not supported 1348 yet), and to existing functions in ECDH and SSL (currently only 1349 implemented client-side, for ECDHE-ECDSA ciphersuites in TLS 1.2, 1350 including client authentication). 1351 * Add support for Arm CPU DSP extensions to accelerate asymmetric key 1352 operations. On CPUs where the extensions are available, they can accelerate 1353 MPI multiplications used in ECC and RSA cryptography. Contributed by 1354 Aurelien Jarno. 1355 * Extend RSASSA-PSS signature to allow a smaller salt size. Previously, PSS 1356 signature always used a salt with the same length as the hash, and returned 1357 an error if this was not possible. Now the salt size may be up to two bytes 1358 shorter. This allows the library to support all hash and signature sizes 1359 that comply with FIPS 186-4, including SHA-512 with a 1024-bit key. 1360 * Add support for 128-bit keys in CTR_DRBG. Note that using keys shorter 1361 than 256 bits limits the security of generated material to 128 bits. 1362 1363API Changes 1364 * Add a common error code of `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` for 1365 a feature that is not supported by underlying alternative 1366 implementations implementing cryptographic primitives. This is useful for 1367 hardware accelerators that don't implement all options or features. 1368 1369New deprecations 1370 * All module specific errors following the form 1371 MBEDTLS_ERR_XXX_FEATURE_UNAVAILABLE that indicate a feature is not 1372 supported are deprecated and are now replaced by the new equivalent 1373 platform error. 1374 * All module specific generic hardware acceleration errors following the 1375 form MBEDTLS_ERR_XXX_HW_ACCEL_FAILED that are deprecated and are replaced 1376 by the equivalent plaform error. 1377 * Deprecate the function mbedtls_mpi_is_prime() in favor of 1378 mbedtls_mpi_is_prime_ext() which allows specifying the number of 1379 Miller-Rabin rounds. 1380 1381Bugfix 1382 * Fix wrong order of freeing in programs/ssl/ssl_server2 example 1383 application leading to a memory leak in case both 1384 MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE are set. 1385 Fixes #2069. 1386 * Fix a bug in the update function for SSL ticket keys which previously 1387 invalidated keys of a lifetime of less than a 1s. Fixes #1968. 1388 * Fix failure in hmac_drbg in the benchmark sample application, when 1389 MBEDTLS_THREADING_C is defined. Found by TrinityTonic, #1095 1390 * Fix a bug in the record decryption routine ssl_decrypt_buf() 1391 which lead to accepting properly authenticated but improperly 1392 padded records in case of CBC ciphersuites using Encrypt-then-MAC. 1393 * Fix memory leak and freeing without initialization in the example 1394 program programs/x509/cert_write. Fixes #1422. 1395 * Ignore IV in mbedtls_cipher_set_iv() when the cipher mode is 1396 MBEDTLS_MODE_ECB. Found by ezdevelop. Fixes #1091. 1397 * Zeroize memory used for buffering or reassembling handshake messages 1398 after use. 1399 * Use `mbedtls_platform_zeroize()` instead of `memset()` for zeroization 1400 of sensitive data in the example programs aescrypt2 and crypt_and_hash. 1401 * Change the default string format used for various X.509 DN attributes to 1402 UTF8String. Previously, the use of the PrintableString format led to 1403 wildcards and non-ASCII characters being unusable in some DN attributes. 1404 Reported by raprepo in #1860 and by kevinpt in #468. Fix contributed by 1405 Thomas-Dee. 1406 * Fix compilation failure for configurations which use compile time 1407 replacements of standard calloc/free functions through the macros 1408 MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO. 1409 Reported by ole-de and ddhome2006. Fixes #882, #1642 and #1706. 1410 1411Changes 1412 * Removed support for Yotta as a build tool. 1413 * Add tests for session resumption in DTLS. 1414 * Close a test gap in (D)TLS between the client side and the server side: 1415 test the handling of large packets and small packets on the client side 1416 in the same way as on the server side. 1417 * Change the dtls_client and dtls_server samples to work by default over 1418 IPv6 and optionally by a build option over IPv4. 1419 * Change the use of Windows threading to use Microsoft Visual C++ runtime 1420 calls, rather than Win32 API calls directly. This is necessary to avoid 1421 conflict with C runtime usage. Found and fixed by irwir. 1422 * Remember the string format of X.509 DN attributes when replicating 1423 X.509 DNs. Previously, DN attributes were always written in their default 1424 string format (mostly PrintableString), which could lead to CRTs being 1425 created which used PrintableStrings in the issuer field even though the 1426 signing CA used UTF8Strings in its subject field; while X.509 compliant, 1427 such CRTs were rejected in some applications, e.g. some versions of 1428 Firefox, curl and GnuTLS. Reported in #1033 by Moschn. Fix contributed by 1429 Thomas-Dee. 1430 * Improve documentation of mbedtls_ssl_get_verify_result(). 1431 Fixes #517 reported by github-monoculture. 1432 * Add MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR flag to mbedtls_mpi_gen_prime() and 1433 use it to reduce error probability in RSA key generation to levels mandated 1434 by FIPS-186-4. 1435 1436= mbed TLS 2.13.1 branch released 2018-09-06 1437 1438API Changes 1439 * Extend the platform module with an abstraction mbedtls_platform_gmtime_r() 1440 whose implementation should behave as a thread-safe version of gmtime(). 1441 This allows users to configure such an implementation at compile time when 1442 the target system cannot be deduced automatically, by setting the option 1443 MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to 1444 automatically select implementations for Windows and POSIX C libraries. 1445 1446Bugfix 1447 * Fix build failures on platforms where only gmtime() is available but 1448 neither gmtime_r() nor gmtime_s() are present. Fixes #1907. 1449 1450= mbed TLS 2.13.0 branch released 2018-08-31 1451 1452Security 1453 * Fix an issue in the X.509 module which could lead to a buffer overread 1454 during certificate extensions parsing. In case of receiving malformed 1455 input (extensions length field equal to 0), an illegal read of one byte 1456 beyond the input buffer is made. Found and analyzed by Nathan Crandall. 1457 1458Features 1459 * Add support for fragmentation of outgoing DTLS handshake messages. This 1460 is controlled by the maximum fragment length as set locally or negotiated 1461 with the peer, as well as by a new per-connection MTU option, set using 1462 mbedtls_ssl_set_mtu(). 1463 * Add support for auto-adjustment of MTU to a safe value during the 1464 handshake when flights do not get through (RFC 6347, section 4.1.1.1, 1465 last paragraph). 1466 * Add support for packing multiple records within a single datagram, 1467 enabled by default. 1468 * Add support for buffering out-of-order handshake messages in DTLS. 1469 The maximum amount of RAM used for this can be controlled by the 1470 compile-time constant MBEDTLS_SSL_DTLS_MAX_BUFFERING defined 1471 in mbedtls/config.h. 1472 1473API Changes 1474 * Add function mbedtls_ssl_set_datagram_packing() to configure 1475 the use of datagram packing (enabled by default). 1476 1477Bugfix 1478 * Fix a potential memory leak in mbedtls_ssl_setup() function. An allocation 1479 failure in the function could lead to other buffers being leaked. 1480 * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if 1481 MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890 1482 * Fix a memory leak in ecp_mul_comb() if ecp_precompute_comb() fails. 1483 Fix contributed by Espressif Systems. 1484 * Add ecc extensions only if an ecc based ciphersuite is used. 1485 This improves compliance to RFC 4492, and as a result, solves 1486 interoperability issues with BouncyCastle. Raised by milenamil in #1157. 1487 * Replace printf with mbedtls_printf in the ARIA module. Found by 1488 TrinityTonic in #1908. 1489 * Fix potential use-after-free in mbedtls_ssl_get_max_frag_len() 1490 and mbedtls_ssl_get_record_expansion() after a session reset. Fixes #1941. 1491 * Fix a bug that caused SSL/TLS clients to incorrectly abort the handshake 1492 with TLS versions 1.1 and earlier when the server requested authentication 1493 without providing a list of CAs. This was due to an overly strict bounds 1494 check in parsing the CertificateRequest message, 1495 introduced in Mbed TLS 2.12.0. Fixes #1954. 1496 * Fix a miscalculation of the maximum record expansion in 1497 mbedtls_ssl_get_record_expansion() in case of ChachaPoly ciphersuites, 1498 or CBC ciphersuites in (D)TLS versions 1.1 or higher. Fixes #1913, #1914. 1499 * Fix undefined shifts with negative values in certificates parsing 1500 (found by Catena cyber using oss-fuzz) 1501 * Fix memory leak and free without initialization in pk_encrypt 1502 and pk_decrypt example programs. Reported by Brace Stout. Fixes #1128. 1503 * Remove redundant else statement. Raised by irwir. Fixes #1776. 1504 1505Changes 1506 * Copy headers preserving timestamps when doing a "make install". 1507 Contributed by xueruini. 1508 * Allow the forward declaration of public structs. Contributed by Dawid 1509 Drozd. Fixes #1215 raised by randombit. 1510 * Improve compatibility with some alternative CCM implementations by using 1511 CCM test vectors from RAM. 1512 * Add support for buffering of out-of-order handshake messages. 1513 * Add warnings to the documentation of the HKDF module to reduce the risk 1514 of misusing the mbedtls_hkdf_extract() and mbedtls_hkdf_expand() 1515 functions. Fixes #1775. Reported by Brian J. Murray. 1516 1517= mbed TLS 2.12.0 branch released 2018-07-25 1518 1519Security 1520 * Fix a vulnerability in TLS ciphersuites based on CBC and using SHA-384, 1521 in (D)TLS 1.0 to 1.2, that allowed an active network attacker to 1522 partially recover the plaintext of messages under some conditions by 1523 exploiting timing measurements. With DTLS, the attacker could perform 1524 this recovery by sending many messages in the same connection. With TLS 1525 or if mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only 1526 worked if the same secret (for example a HTTP Cookie) has been repeatedly 1527 sent over connections manipulated by the attacker. Connections using GCM 1528 or CCM instead of CBC, using hash sizes other than SHA-384, or using 1529 Encrypt-then-Mac (RFC 7366) were not affected. The vulnerability was 1530 caused by a miscalculation (for SHA-384) in a countermeasure to the 1531 original Lucky 13 attack. Found by Kenny Paterson, Eyal Ronen and Adi 1532 Shamir. 1533 * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to 1534 1.2, that allowed a local attacker, able to execute code on the local 1535 machine as well as manipulate network packets, to partially recover the 1536 plaintext of messages under some conditions by using a cache attack 1537 targeting an internal MD/SHA buffer. With TLS or if 1538 mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if 1539 the same secret (for example a HTTP Cookie) has been repeatedly sent over 1540 connections manipulated by the attacker. Connections using GCM or CCM 1541 instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected. 1542 Found by Kenny Paterson, Eyal Ronen and Adi Shamir. 1543 * Add a counter-measure against a vulnerability in TLS ciphersuites based 1544 on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to 1545 execute code on the local machine as well as manipulate network packets, 1546 to partially recover the plaintext of messages under some conditions (see 1547 previous entry) by using a cache attack targeting the SSL input record 1548 buffer. Connections using GCM or CCM instead of CBC or using 1549 Encrypt-then-Mac (RFC 7366) were not affected. Found by Kenny Paterson, 1550 Eyal Ronen and Adi Shamir. 1551 1552Features 1553 * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time 1554 authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed 1555 by Daniel King. 1556 * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905. 1557 * Add platform support for the Haiku OS. (https://www.haiku-os.org). 1558 Contributed by Augustin Cavalier. 1559 * Make the receive and transmit buffers independent sizes, for situations 1560 where the outgoing buffer can be fixed at a smaller size than the incoming 1561 buffer, which can save some RAM. If buffer lengths are kept equal, there 1562 is no functional difference. Contributed by Angus Gratton, and also 1563 independently contributed again by Paul Sokolovsky. 1564 * Add support for key wrapping modes based on AES as defined by 1565 NIST SP 800-38F algorithms KW and KWP and by RFC 3394 and RFC 5649. 1566 1567Bugfix 1568 * Fix the key_app_writer example which was writing a leading zero byte which 1569 was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257. 1570 * Fix compilation error on C++, because of a variable named new. 1571 Found and fixed by Hirotaka Niisato in #1783. 1572 * Fix "no symbols" warning issued by ranlib when building on Mac OS X. Fix 1573 contributed by tabascoeye. 1574 * Clarify documentation for mbedtls_ssl_write() to include 0 as a valid 1575 return value. Found by @davidwu2000. #839 1576 * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber, 1577 Philippe Antoine. Fixes #1623. 1578 * Remove unused headers included in x509.c. Found by Chris Hanson and fixed 1579 by Brendan Shanks. Part of a fix for #992. 1580 * Fix compilation error when MBEDTLS_ARC4_C is disabled and 1581 MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719. 1582 * Added length checks to some TLS parsing functions. Found and fixed by 1583 Philippe Antoine from Catena cyber. #1663. 1584 * Fix the inline assembly for the MPI multiply helper function for i386 and 1585 i386 with SSE2. Found by László Langó. Fixes #1550 1586 * Fix namespacing in header files. Remove the `mbedtls` namespacing in 1587 the `#include` in the header files. Resolves #857 1588 * Fix compiler warning of 'use before initialisation' in 1589 mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid 1590 Drozd. #1098 1591 * Fix decryption for zero length messages (which contain all padding) when a 1592 CBC based ciphersuite is used together with Encrypt-then-MAC. Previously, 1593 such a message was wrongly reported as an invalid record and therefore lead 1594 to the connection being terminated. Seen most often with OpenSSL using 1595 TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix 1596 contributed by Espressif Systems. Fixes #1632 1597 * Fix ssl_client2 example to send application data with 0-length content 1598 when the request_size argument is set to 0 as stated in the documentation. 1599 Fixes #1833. 1600 * Correct the documentation for `mbedtls_ssl_get_session()`. This API has 1601 deep copy of the session, and the peer certificate is not lost. Fixes #926. 1602 * Fix build using -std=c99. Fixed by Nick Wilson. 1603 1604Changes 1605 * Fail when receiving a TLS alert message with an invalid length, or invalid 1606 zero-length messages when using TLS 1.2. Contributed by Espressif Systems. 1607 * Change the default behaviour of mbedtls_hkdf_extract() to return an error 1608 when calling with a NULL salt and non-zero salt_len. Contributed by 1609 Brian J Murray 1610 * Change the shebang line in Perl scripts to look up perl in the PATH. 1611 Contributed by fbrosson. 1612 * Allow overriding the time on Windows via the platform-time abstraction. 1613 Fixed by Nick Wilson. 1614 * Use gmtime_r/gmtime_s for thread-safety. Fixed by Nick Wilson. 1615 1616= mbed TLS 2.11.0 branch released 2018-06-18 1617 1618Features 1619 * Add additional block mode, OFB (Output Feedback), to the AES module and 1620 cipher abstraction module. 1621 * Implement the HMAC-based extract-and-expand key derivation function 1622 (HKDF) per RFC 5869. Contributed by Thomas Fossati. 1623 * Add support for the CCM* block cipher mode as defined in IEEE Std. 802.15.4. 1624 * Add support for the XTS block cipher mode with AES (AES-XTS). 1625 Contributed by Aorimn in pull request #414. 1626 * In TLS servers, support offloading private key operations to an external 1627 cryptoprocessor. Private key operations can be asynchronous to allow 1628 non-blocking operation of the TLS server stack. 1629 1630Bugfix 1631 * Fix the cert_write example to handle certificates signed with elliptic 1632 curves as well as RSA. Fixes #777 found by dbedev. 1633 * Fix for redefinition of _WIN32_WINNT to avoid overriding a definition 1634 used by user applications. Found and fixed by Fabio Alessandrelli. 1635 * Fix compilation warnings with IAR toolchain, on 32 bit platform. 1636 Reported by rahmanih in #683 1637 * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552. 1638 1639Changes 1640 * Changed CMake defaults for IAR to treat all compiler warnings as errors. 1641 * Changed the Clang parameters used in the CMake build files to work for 1642 versions later than 3.6. Versions of Clang earlier than this may no longer 1643 work. Fixes #1072 1644 1645= mbed TLS 2.10.0 branch released 2018-06-06 1646 1647Features 1648 * Add support for ARIA cipher (RFC 5794) and associated TLS ciphersuites 1649 (RFC 6209). Disabled by default, see MBEDTLS_ARIA_C in config.h 1650 1651API Changes 1652 * Extend the platform module with a util component that contains 1653 functionality shared by multiple Mbed TLS modules. At this stage 1654 platform_util.h (and its associated platform_util.c) only contain 1655 mbedtls_platform_zeroize(), which is a critical function from a security 1656 point of view. mbedtls_platform_zeroize() needs to be regularly tested 1657 against compilers to ensure that calls to it are not removed from the 1658 output binary as part of redundant code elimination optimizations. 1659 Therefore, mbedtls_platform_zeroize() is moved to the platform module to 1660 facilitate testing and maintenance. 1661 1662Bugfix 1663 * Fix an issue with MicroBlaze support in bn_mul.h which was causing the 1664 build to fail. Found by zv-io. Fixes #1651. 1665 1666Changes 1667 * Support TLS testing in out-of-source builds using cmake. Fixes #1193. 1668 * Fix redundant declaration of mbedtls_ssl_list_ciphersuites. Raised by 1669 TrinityTonic. #1359. 1670 1671= mbed TLS 2.9.0 branch released 2018-04-30 1672 1673Security 1674 * Fix an issue in the X.509 module which could lead to a buffer overread 1675 during certificate validation. Additionally, the issue could also lead to 1676 unnecessary callback checks being made or to some validation checks to be 1677 omitted. The overread could be triggered remotely, while the other issues 1678 would require a non DER-compliant certificate to be correctly signed by a 1679 trusted CA, or a trusted CA with a non DER-compliant certificate. Found by 1680 luocm. Fixes #825. 1681 * Fix the buffer length assertion in the ssl_parse_certificate_request() 1682 function which led to an arbitrary overread of the message buffer. The 1683 overreads could be caused by receiving a malformed message at the point 1684 where an optional signature algorithms list is expected when the signature 1685 algorithms section is too short. In builds with debug output, the overread 1686 data is output with the debug data. 1687 * Fix a client-side bug in the validation of the server's ciphersuite choice 1688 which could potentially lead to the client accepting a ciphersuite it didn't 1689 offer or a ciphersuite that cannot be used with the TLS or DTLS version 1690 chosen by the server. This could lead to corruption of internal data 1691 structures for some configurations. 1692 1693Features 1694 * Add an option, MBEDTLS_AES_FEWER_TABLES, to dynamically compute smaller AES 1695 tables during runtime, thereby reducing the RAM/ROM footprint by ~6KiB. 1696 Suggested and contributed by jkivilin in pull request #394. 1697 * Add initial support for Curve448 (RFC 7748). Only mbedtls_ecp_mul() and 1698 ECDH primitive functions (mbedtls_ecdh_gen_public(), 1699 mbedtls_ecdh_compute_shared()) are supported for now. Contributed by 1700 Nicholas Wilson in pull request #348. 1701 1702API Changes 1703 * Extend the public API with the function of mbedtls_net_poll() to allow user 1704 applications to wait for a network context to become ready before reading 1705 or writing. 1706 * Add function mbedtls_ssl_check_pending() to the public API to allow 1707 a check for whether more more data is pending to be processed in the 1708 internal message buffers. 1709 This function is necessary to determine when it is safe to idle on the 1710 underlying transport in case event-driven IO is used. 1711 1712Bugfix 1713 * Fix a spurious uninitialized variable warning in cmac.c. Fix independently 1714 contributed by Brian J Murray and David Brown. 1715 * Add missing dependencies in test suites that led to build failures 1716 in configurations that omit certain hashes or public-key algorithms. 1717 Fixes #1040. 1718 * Fix C89 incompatibility in benchmark.c. Contributed by Brendan Shanks. 1719 #1353 1720 * Add missing dependencies for MBEDTLS_HAVE_TIME_DATE and 1721 MBEDTLS_VERSION_FEATURES in some test suites. Contributed by 1722 Deomid Ryabkov. Fixes #1299, #1475. 1723 * Fix the Makefile build process for building shared libraries on Mac OS X. 1724 Fixed by mnacamura. 1725 * Fix parsing of PKCS#8 encoded Elliptic Curve keys. Previously Mbed TLS was 1726 unable to parse keys which had only the optional parameters field of the 1727 ECPrivateKey structure. Found by Jethro Beekman, fixed in #1379. 1728 * Return the plaintext data more quickly on unpadded CBC decryption, as 1729 stated in the mbedtls_cipher_update() documentation. Contributed by 1730 Andy Leiserson. 1731 * Fix overriding and ignoring return values when parsing and writing to 1732 a file in pk_sign program. Found by kevlut in #1142. 1733 * Restrict usage of error code MBEDTLS_ERR_SSL_WANT_READ to situations 1734 where data needs to be fetched from the underlying transport in order 1735 to make progress. Previously, this error code was also occasionally 1736 returned when unexpected messages were being discarded, ignoring that 1737 further messages could potentially already be pending to be processed 1738 in the internal buffers; these cases led to deadlocks when event-driven 1739 I/O was used. Found and reported by Hubert Mis in #772. 1740 * Fix buffer length assertions in the ssl_parse_certificate_request() 1741 function which leads to a potential one byte overread of the message 1742 buffer. 1743 * Fix invalid buffer sizes passed to zlib during record compression and 1744 decompression. 1745 * Fix the soversion of libmbedcrypto to match the soversion of the 1746 maintained 2.7 branch. The soversion was increased in Mbed TLS 1747 version 2.7.1 to reflect breaking changes in that release, but the 1748 increment was missed in 2.8.0 and later releases outside of the 2.7 branch. 1749 1750Changes 1751 * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub. 1752 * Support cmake builds where Mbed TLS is a subproject. Fix contributed 1753 independently by Matthieu Volat and Arne Schwabe. 1754 * Improve testing in configurations that omit certain hashes or 1755 public-key algorithms. Includes contributions by Gert van Dijk. 1756 * Improve negative testing of X.509 parsing. 1757 * Do not define global mutexes around readdir() and gmtime() in 1758 configurations where the feature is disabled. Found and fixed by Gergely 1759 Budai. 1760 * Harden the function mbedtls_ssl_config_free() against misuse, so that it 1761 doesn't leak memory if the user doesn't use mbedtls_ssl_conf_psk() and 1762 instead incorrectly manipulates the configuration structure directly. 1763 Found and fix submitted by junyeonLEE in #1220. 1764 * Provide an empty implementation of mbedtls_pkcs5_pbes2() when 1765 MBEDTLS_ASN1_PARSE_C is not enabled. This allows the use of PBKDF2 1766 without PBES2. Fixed by Marcos Del Sol Vives. 1767 * Add the order of the base point as N in the mbedtls_ecp_group structure 1768 for Curve25519 (other curves had it already). Contributed by Nicholas 1769 Wilson #481 1770 * Improve the documentation of mbedtls_net_accept(). Contributed by Ivan 1771 Krylov. 1772 * Improve the documentation of mbedtls_ssl_write(). Suggested by 1773 Paul Sokolovsky in #1356. 1774 * Add an option in the Makefile to support ar utilities where the operation 1775 letter must not be prefixed by '-', such as LLVM. Found and fixed by 1776 Alex Hixon. 1777 * Allow configuring the shared library extension by setting the DLEXT 1778 environment variable when using the project makefiles. 1779 * Optimize unnecessary zeroing in mbedtls_mpi_copy. Based on a contribution 1780 by Alexey Skalozub in #405. 1781 * In the SSL module, when f_send, f_recv or f_recv_timeout report 1782 transmitting more than the required length, return an error. Raised by 1783 Sam O'Connor in #1245. 1784 * Improve robustness of mbedtls_ssl_derive_keys against the use of 1785 HMAC functions with non-HMAC ciphersuites. Independently contributed 1786 by Jiayuan Chen in #1377. Fixes #1437. 1787 * Improve security of RSA key generation by including criteria from 1788 FIPS 186-4. Contributed by Jethro Beekman. #1380 1789 * Declare functions in header files even when an alternative implementation 1790 of the corresponding module is activated by defining the corresponding 1791 MBEDTLS_XXX_ALT macro. This means that alternative implementations do 1792 not need to copy the declarations, and ensures that they will have the 1793 same API. 1794 * Add platform setup and teardown calls in test suites. 1795 1796= mbed TLS 2.8.0 branch released 2018-03-16 1797 1798Default behavior changes 1799 * The truncated HMAC extension now conforms to RFC 6066. This means 1800 that when both sides of a TLS connection negotiate the truncated 1801 HMAC extension, Mbed TLS can now interoperate with other 1802 compliant implementations, but this breaks interoperability with 1803 prior versions of Mbed TLS. To restore the old behavior, enable 1804 the (deprecated) option MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT in 1805 config.h. Found by Andreas Walz (ivESK, Offenburg University of 1806 Applied Sciences). 1807 1808Security 1809 * Fix implementation of the truncated HMAC extension. The previous 1810 implementation allowed an offline 2^80 brute force attack on the 1811 HMAC key of a single, uninterrupted connection (with no 1812 resumption of the session). 1813 * Verify results of RSA private key operations to defend 1814 against Bellcore glitch attack. 1815 * Fix a buffer overread in ssl_parse_server_key_exchange() that could cause 1816 a crash on invalid input. 1817 * Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a 1818 crash on invalid input. 1819 * Fix CRL parsing to reject CRLs containing unsupported critical 1820 extensions. Found by Falko Strenzke and Evangelos Karatsiolis. 1821 1822Features 1823 * Extend PKCS#8 interface by introducing support for the entire SHA 1824 algorithms family when encrypting private keys using PKCS#5 v2.0. 1825 This allows reading encrypted PEM files produced by software that 1826 uses PBKDF2-SHA2, such as OpenSSL 1.1. Submitted by Antonio Quartulli, 1827 OpenVPN Inc. Fixes #1339 1828 * Add support for public keys encoded in PKCS#1 format. #1122 1829 1830New deprecations 1831 * Deprecate support for record compression (configuration option 1832 MBEDTLS_ZLIB_SUPPORT). 1833 1834Bugfix 1835 * Fix the name of a DHE parameter that was accidentally changed in 2.7.0. 1836 Fixes #1358. 1837 * Fix test_suite_pk to work on 64-bit ILP32 systems. #849 1838 * Fix mbedtls_x509_crt_profile_suiteb, which used to reject all certificates 1839 with flag MBEDTLS_X509_BADCERT_BAD_PK even when the key type was correct. 1840 In the context of SSL, this resulted in handshake failure. Reported by 1841 daniel in the Mbed TLS forum. #1351 1842 * Fix Windows x64 builds with the included mbedTLS.sln file. #1347 1843 * Fix setting version TLSv1 as minimal version, even if TLS 1 1844 is not enabled. Set MBEDTLS_SSL_MIN_MAJOR_VERSION 1845 and MBEDTLS_SSL_MIN_MINOR_VERSION instead of 1846 MBEDTLS_SSL_MAJOR_VERSION_3 and MBEDTLS_SSL_MINOR_VERSION_1. #664 1847 * Fix compilation error on Mingw32 when _TRUNCATE is defined. Use _TRUNCATE 1848 only if __MINGW32__ not defined. Fix suggested by Thomas Glanzmann and 1849 Nick Wilson on issue #355 1850 * In test_suite_pk, pass valid parameters when testing for hash length 1851 overflow. #1179 1852 * Fix memory allocation corner cases in memory_buffer_alloc.c module. Found 1853 by Guido Vranken. #639 1854 * Log correct number of ciphersuites used in Client Hello message. #918 1855 * Fix X509 CRT parsing that would potentially accept an invalid tag when 1856 parsing the subject alternative names. 1857 * Fix a possible arithmetic overflow in ssl_parse_server_key_exchange() 1858 that could cause a key exchange to fail on valid data. 1859 * Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that 1860 could cause a key exchange to fail on valid data. 1861 * Don't define mbedtls_aes_decrypt and mbedtls_aes_encrypt under 1862 MBEDTLS_DEPRECATED_REMOVED. #1388 1863 * Fix a 1-byte heap buffer overflow (read-only) during private key parsing. 1864 Found through fuzz testing. 1865 1866Changes 1867 * Fix tag lengths and value ranges in the documentation of CCM encryption. 1868 Contributed by Mathieu Briand. 1869 * Fix typo in a comment ctr_drbg.c. Contributed by Paul Sokolovsky. 1870 * Remove support for the library reference configuration for picocoin. 1871 * MD functions deprecated in 2.7.0 are no longer inline, to provide 1872 a migration path for those depending on the library's ABI. 1873 * Clarify the documentation of mbedtls_ssl_setup. 1874 * Use (void) when defining functions with no parameters. Contributed by 1875 Joris Aerts. #678 1876 1877= mbed TLS 2.7.0 branch released 2018-02-03 1878 1879Security 1880 * Fix a heap corruption issue in the implementation of the truncated HMAC 1881 extension. When the truncated HMAC extension is enabled and CBC is used, 1882 sending a malicious application packet could be used to selectively corrupt 1883 6 bytes on the peer's heap, which could potentially lead to crash or remote 1884 code execution. The issue could be triggered remotely from either side in 1885 both TLS and DTLS. CVE-2018-0488 1886 * Fix a buffer overflow in RSA-PSS verification when the hash was too large 1887 for the key size, which could potentially lead to crash or remote code 1888 execution. Found by Seth Terashima, Qualcomm Product Security Initiative, 1889 Qualcomm Technologies Inc. CVE-2018-0487 1890 * Fix buffer overflow in RSA-PSS verification when the unmasked data is all 1891 zeros. 1892 * Fix an unsafe bounds check in ssl_parse_client_psk_identity() when adding 1893 64 KiB to the address of the SSL buffer and causing a wrap around. 1894 * Fix a potential heap buffer overflow in mbedtls_ssl_write(). When the (by 1895 default enabled) maximum fragment length extension is disabled in the 1896 config and the application data buffer passed to mbedtls_ssl_write 1897 is larger than the internal message buffer (16384 bytes by default), the 1898 latter overflows. The exploitability of this issue depends on whether the 1899 application layer can be forced into sending such large packets. The issue 1900 was independently reported by Tim Nordell via e-mail and by Florin Petriuc 1901 and sjorsdewit on GitHub. Fix proposed by Florin Petriuc in #1022. 1902 Fixes #707. 1903 * Add a provision to prevent compiler optimizations breaking the time 1904 constancy of mbedtls_ssl_safer_memcmp(). 1905 * Ensure that buffers are cleared after use if they contain sensitive data. 1906 Changes were introduced in multiple places in the library. 1907 * Set PEM buffer to zero before freeing it, to avoid decoded private keys 1908 being leaked to memory after release. 1909 * Fix dhm_check_range() failing to detect trivial subgroups and potentially 1910 leaking 1 bit of the private key. Reported by prashantkspatil. 1911 * Make mbedtls_mpi_read_binary() constant-time with respect to the input 1912 data. Previously, trailing zero bytes were detected and omitted for the 1913 sake of saving memory, but potentially leading to slight timing 1914 differences. Reported by Marco Macchetti, Kudelski Group. 1915 * Wipe stack buffer temporarily holding EC private exponent 1916 after keypair generation. 1917 * Fix a potential heap buffer over-read in ALPN extension parsing 1918 (server-side). Could result in application crash, but only if an ALPN 1919 name larger than 16 bytes had been configured on the server. 1920 * Change default choice of DHE parameters from untrustworthy RFC 5114 1921 to RFC 3526 containing parameters generated in a nothing-up-my-sleeve 1922 manner. 1923 1924Features 1925 * Allow comments in test data files. 1926 * The selftest program can execute a subset of the tests based on command 1927 line arguments. 1928 * New unit tests for timing. Improve the self-test to be more robust 1929 when run on a heavily-loaded machine. 1930 * Add alternative implementation support for CCM and CMAC (MBEDTLS_CCM_ALT, 1931 MBEDTLS_CMAC_ALT). Submitted by Steven Cooreman, Silicon Labs. 1932 * Add support for alternative implementations of GCM, selected by the 1933 configuration flag MBEDTLS_GCM_ALT. 1934 * Add support for alternative implementations for ECDSA, controlled by new 1935 configuration flags MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and 1936 MBEDTLS_ECDSDA_GENKEY_AT in config.h. 1937 The following functions from the ECDSA module can be replaced 1938 with alternative implementation: 1939 mbedtls_ecdsa_sign(), mbedtls_ecdsa_verify() and mbedtls_ecdsa_genkey(). 1940 * Add support for alternative implementation of ECDH, controlled by the 1941 new configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and 1942 MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h. 1943 The following functions from the ECDH module can be replaced 1944 with an alternative implementation: 1945 mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared(). 1946 * Add support for alternative implementation of ECJPAKE, controlled by 1947 the new configuration flag MBEDTLS_ECJPAKE_ALT. 1948 * Add mechanism to provide alternative implementation of the DHM module. 1949 1950API Changes 1951 * Extend RSA interface by multiple functions allowing structure- 1952 independent setup and export of RSA contexts. Most notably, 1953 mbedtls_rsa_import() and mbedtls_rsa_complete() are introduced for setting 1954 up RSA contexts from partial key material and having them completed to the 1955 needs of the implementation automatically. This allows to setup private RSA 1956 contexts from keys consisting of N,D,E only, even if P,Q are needed for the 1957 purpose or CRT and/or blinding. 1958 * The configuration option MBEDTLS_RSA_ALT can be used to define alternative 1959 implementations of the RSA interface declared in rsa.h. 1960 * The following functions in the message digest modules (MD2, MD4, MD5, 1961 SHA1, SHA256, SHA512) have been deprecated and replaced as shown below. 1962 The new functions change the return type from void to int to allow 1963 returning error codes when using MBEDTLS_<MODULE>_ALT. 1964 mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret() 1965 mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret() 1966 mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret() 1967 mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process() 1968 1969New deprecations 1970 * Deprecate usage of RSA primitives with non-matching key-type 1971 (e.g. signing with a public key). 1972 * Direct manipulation of structure fields of RSA contexts is deprecated. 1973 Users are advised to use the extended RSA API instead. 1974 * Deprecate usage of message digest functions that return void 1975 (mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update, 1976 mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is 1977 any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions 1978 that can return an error code. 1979 * Deprecate untrustworthy DHE parameters from RFC 5114. Superseded by 1980 parameters from RFC 3526 or the newly added parameters from RFC 7919. 1981 * Deprecate hex string DHE constants MBEDTLS_DHM_RFC3526_MODP_2048_P etc. 1982 Supserseded by binary encoded constants MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN 1983 etc. 1984 * Deprecate mbedtls_ssl_conf_dh_param() for setting default DHE parameters 1985 from hex strings. Superseded by mbedtls_ssl_conf_dh_param_bin() 1986 accepting DHM parameters in binary form, matching the new constants. 1987 1988Bugfix 1989 * Fix ssl_parse_record_header() to silently discard invalid DTLS records 1990 as recommended in RFC 6347 Section 4.1.2.7. 1991 * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times. 1992 Found by projectgus and Jethro Beekman, #836. 1993 * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin. 1994 * Parse signature algorithm extension when renegotiating. Previously, 1995 renegotiated handshakes would only accept signatures using SHA-1 1996 regardless of the peer's preferences, or fail if SHA-1 was disabled. 1997 * Fix leap year calculation in x509_date_is_valid() to ensure that invalid 1998 dates on leap years with 100 and 400 intervals are handled correctly. Found 1999 by Nicholas Wilson. #694 2000 * Fix some invalid RSA-PSS signatures with keys of size 8N+1 that were 2001 accepted. Generating these signatures required the private key. 2002 * Fix out-of-memory problem when parsing 4096-bit PKCS8-encrypted RSA keys. 2003 Found independently by Florian in the mbed TLS forum and by Mishamax. 2004 #878, #1019. 2005 * Fix variable used before assignment compilation warnings with IAR 2006 toolchain. Found by gkerrien38. 2007 * Fix unchecked return codes from AES, DES and 3DES functions in 2008 pem_aes_decrypt(), pem_des_decrypt() and pem_des3_decrypt() respectively. 2009 If a call to one of the functions of the cryptographic primitive modules 2010 failed, the error may not be noticed by the function 2011 mbedtls_pem_read_buffer() causing it to return invalid values. Found by 2012 Guido Vranken. #756 2013 * Include configuration file in md.h, to fix compilation warnings. 2014 Reported by aaronmdjones in #1001 2015 * Correct extraction of signature-type from PK instance in X.509 CRT and CSR 2016 writing routines that prevented these functions to work with alternative 2017 RSA implementations. Raised by J.B. in the Mbed TLS forum. Fixes #1011. 2018 * Don't print X.509 version tag for v1 CRT's, and omit extensions for 2019 non-v3 CRT's. 2020 * Fix bugs in RSA test suite under MBEDTLS_NO_PLATFORM_ENTROPY. #1023 #1024 2021 * Fix net_would_block() to avoid modification by errno through fcntl() call. 2022 Found by nkolban. Fixes #845. 2023 * Fix handling of handshake messages in mbedtls_ssl_read() in case 2024 MBEDTLS_SSL_RENEGOTIATION is disabled. Found by erja-gp. 2025 * Add a check for invalid private parameters in mbedtls_ecdsa_sign(). 2026 Reported by Yolan Romailler. 2027 * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64. 2028 * Fix incorrect unit in benchmark output. #850 2029 * Add size-checks for record and handshake message content, securing 2030 fragile yet non-exploitable code-paths. 2031 * Fix crash when calling mbedtls_ssl_cache_free() twice. Found by 2032 MilenkoMitrovic, #1104 2033 * Fix mbedtls_timing_alarm(0) on Unix and MinGW. 2034 * Fix use of uninitialized memory in mbedtls_timing_get_timer() when reset=1. 2035 * Fix possible memory leaks in mbedtls_gcm_self_test(). 2036 * Added missing return code checks in mbedtls_aes_self_test(). 2037 * Fix issues in RSA key generation program programs/x509/rsa_genkey and the 2038 RSA test suite where the failure of CTR DRBG initialization lead to 2039 freeing an RSA context and several MPI's without proper initialization 2040 beforehand. 2041 * Fix error message in programs/pkey/gen_key.c. Found and fixed by Chris Xue. 2042 * Fix programs/pkey/dh_server.c so that it actually works with dh_client.c. 2043 Found and fixed by Martijn de Milliano. 2044 * Fix an issue in the cipher decryption with the mode 2045 MBEDTLS_PADDING_ONE_AND_ZEROS that sometimes accepted invalid padding. 2046 Note, this padding mode is not used by the TLS protocol. Found and fixed by 2047 Micha Kraus. 2048 * Fix the entropy.c module to not call mbedtls_sha256_starts() or 2049 mbedtls_sha512_starts() in the mbedtls_entropy_init() function. 2050 * Fix the entropy.c module to ensure that mbedtls_sha256_init() or 2051 mbedtls_sha512_init() is called before operating on the relevant context 2052 structure. Do not assume that zeroizing a context is a correct way to 2053 reset it. Found independently by ccli8 on Github. 2054 * In mbedtls_entropy_free(), properly free the message digest context. 2055 * Fix status handshake status message in programs/ssl/dtls_client.c. Found 2056 and fixed by muddog. 2057 2058Changes 2059 * Extend cert_write example program by options to set the certificate version 2060 and the message digest. Further, allow enabling/disabling of authority 2061 identifier, subject identifier and basic constraints extensions. 2062 * Only check for necessary RSA structure fields in `mbedtls_rsa_private`. In 2063 particular, don't require P,Q if neither CRT nor blinding are 2064 used. Reported and fix proposed independently by satur9nine and sliai 2065 on GitHub. 2066 * Only run AES-192 self-test if AES-192 is available. Fixes #963. 2067 * Tighten the RSA PKCS#1 v1.5 signature verification code and remove the 2068 undeclared dependency of the RSA module on the ASN.1 module. 2069 * Update all internal usage of deprecated message digest functions to the 2070 new ones with return codes. In particular, this modifies the 2071 mbedtls_md_info_t structure. Propagate errors from these functions 2072 everywhere except some locations in the ssl_tls.c module. 2073 * Improve CTR_DRBG error handling by propagating underlying AES errors. 2074 * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography 2075 modules where the software implementation can be replaced by a hardware 2076 implementation. 2077 * Add explicit warnings for the use of MD2, MD4, MD5, SHA-1, DES and ARC4 2078 throughout the library. 2079 2080= mbed TLS 2.6.0 branch released 2017-08-10 2081 2082Security 2083 * Fix authentication bypass in SSL/TLS: when authmode is set to optional, 2084 mbedtls_ssl_get_verify_result() would incorrectly return 0 when the peer's 2085 X.509 certificate chain had more than MBEDTLS_X509_MAX_INTERMEDIATE_CA 2086 (default: 8) intermediates, even when it was not trusted. This could be 2087 triggered remotely from either side. (With authmode set to 'required' 2088 (the default), the handshake was correctly aborted). 2089 * Reliably wipe sensitive data after use in the AES example applications 2090 programs/aes/aescrypt2 and programs/aes/crypt_and_hash. 2091 Found by Laurent Simon. 2092 2093Features 2094 * Add the functions mbedtls_platform_setup() and mbedtls_platform_teardown() 2095 and the context struct mbedtls_platform_context to perform 2096 platform-specific setup and teardown operations. The macro 2097 MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT allows the functions to be overridden 2098 by the user in a platform_alt.h file. These new functions are required in 2099 some embedded environments to provide a means of initialising underlying 2100 cryptographic acceleration hardware. 2101 2102API Changes 2103 * Reverted API/ABI breaking changes introduced in mbed TLS 2.5.1, to make the 2104 API consistent with mbed TLS 2.5.0. Specifically removed the inline 2105 qualifier from the functions mbedtls_aes_decrypt, mbedtls_aes_encrypt, 2106 mbedtls_ssl_ciphersuite_uses_ec and mbedtls_ssl_ciphersuite_uses_psk. Found 2107 by James Cowgill. #978 2108 * Certificate verification functions now set flags to -1 in case the full 2109 chain was not verified due to an internal error (including in the verify 2110 callback) or chain length limitations. 2111 * With authmode set to optional, the TLS handshake is now aborted if the 2112 verification of the peer's certificate failed due to an overlong chain or 2113 a fatal error in the verify callback. 2114 2115Bugfix 2116 * Add a check if iv_len is zero in GCM, and return an error if it is zero. 2117 Reported by roberto. #716 2118 * Replace preprocessor condition from #if defined(MBEDTLS_THREADING_PTHREAD) 2119 to #if defined(MBEDTLS_THREADING_C) as the library cannot assume they will 2120 always be implemented by pthread support. #696 2121 * Fix a resource leak on Windows platforms in mbedtls_x509_crt_parse_path(), 2122 in the case of an error. Found by redplait. #590 2123 * Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random. 2124 Reported and fix suggested by guidovranken. #740 2125 * Fix conditional preprocessor directives in bignum.h to enable 64-bit 2126 compilation when using ARM Compiler 6. 2127 * Fix a potential integer overflow in the version verification for DER 2128 encoded X.509 CRLs. The overflow could enable maliciously constructed CRLs 2129 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin, 2130 KNOX Security, Samsung Research America 2131 * Fix potential integer overflow in the version verification for DER 2132 encoded X.509 CSRs. The overflow could enable maliciously constructed CSRs 2133 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin, 2134 KNOX Security, Samsung Research America 2135 * Fix a potential integer overflow in the version verification for DER 2136 encoded X.509 certificates. The overflow could enable maliciously 2137 constructed certificates to bypass the certificate verification check. 2138 * Fix a call to the libc function time() to call the platform abstraction 2139 function mbedtls_time() instead. Found by wairua. #666 2140 * Avoid shadowing of time and index functions through mbed TLS function 2141 arguments. Found by inestlerode. #557. 2142 2143Changes 2144 * Added config.h option MBEDTLS_NO_UDBL_DIVISION, to prevent the use of 2145 64-bit division. This is useful on embedded platforms where 64-bit division 2146 created a dependency on external libraries. #708 2147 * Removed mutexes from ECP hardware accelerator code. Now all hardware 2148 accelerator code in the library leaves concurrency handling to the 2149 platform. Reported by Steven Cooreman. #863 2150 * Define the macro MBEDTLS_AES_ROM_TABLES in the configuration file 2151 config-no-entropy.h to reduce the RAM footprint. 2152 * Added a test script that can be hooked into git that verifies commits 2153 before they are pushed. 2154 * Improve documentation of PKCS1 decryption functions. 2155 2156= mbed TLS 2.5.1 released 2017-06-21 2157 2158Security 2159 * Fixed unlimited overread of heap-based buffer in mbedtls_ssl_read(). 2160 The issue could only happen client-side with renegotiation enabled. 2161 Could result in DoS (application crash) or information leak 2162 (if the application layer sent data read from mbedtls_ssl_read() 2163 back to the server or to a third party). Can be triggered remotely. 2164 * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for 2165 certificate verification. SHA-1 can be turned back on with a compile-time 2166 option if needed. 2167 * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to 2168 detect it sometimes. Reported by Hugo Leisink. #810 2169 * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a 2170 potential Bleichenbacher/BERserk-style attack. 2171 2172Bugfix 2173 * Remove size zero arrays from ECJPAKE test suite. Size zero arrays are not 2174 valid C and they prevented the test from compiling in Visual Studio 2015 2175 and with GCC using the -Wpedantic compilation option. 2176 * Fix insufficient support for signature-hash-algorithm extension, 2177 resulting in compatibility problems with Chrome. Found by hfloyrd. #823 2178 * Fix behaviour that hid the original cause of fatal alerts in some cases 2179 when sending the alert failed. The fix makes sure not to hide the error 2180 that triggered the alert. 2181 * Fix SSLv3 renegotiation behaviour and stop processing data received from 2182 peer after sending a fatal alert to refuse a renegotiation attempt. 2183 Previous behaviour was to keep processing data even after the alert has 2184 been sent. 2185 * Accept empty trusted CA chain in authentication mode 2186 MBEDTLS_SSL_VERIFY_OPTIONAL. Found by Jethro Beekman. #864 2187 * Fix implementation of mbedtls_ssl_parse_certificate() to not annihilate 2188 fatal errors in authentication mode MBEDTLS_SSL_VERIFY_OPTIONAL and to 2189 reflect bad EC curves within verification result. 2190 * Fix bug that caused the modular inversion function to accept the invalid 2191 modulus 1 and therefore to hang. Found by blaufish. #641. 2192 * Fix incorrect sign computation in modular exponentiation when the base is 2193 a negative MPI. Previously the result was always negative. Found by Guido 2194 Vranken. 2195 * Fix a numerical underflow leading to stack overflow in mpi_read_file() 2196 that was triggered uppon reading an empty line. Found by Guido Vranken. 2197 2198Changes 2199 * Send fatal alerts in more cases. The previous behaviour was to skip 2200 sending the fatal alert and just drop the connection. 2201 * Clarify ECDSA documentation and improve the sample code to avoid 2202 misunderstanding and potentially dangerous use of the API. Pointed out 2203 by Jean-Philippe Aumasson. 2204 2205= mbed TLS 2.5.0 branch released 2017-05-17 2206 2207Security 2208 * Wipe stack buffers in RSA private key operations 2209 (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt). Found by Laurent 2210 Simon. 2211 * Add exponent blinding to RSA private operations as a countermeasure 2212 against side-channel attacks like the cache attack described in 2213 https://arxiv.org/abs/1702.08719v2. 2214 Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss, 2215 Clémentine Maurice and Stefan Mangard. 2216 2217Features 2218 * Add hardware acceleration support for the Elliptic Curve Point module. 2219 This involved exposing parts of the internal interface to enable 2220 replacing the core functions and adding and alternative, module level 2221 replacement support for enabling the extension of the interface. 2222 * Add a new configuration option to 'mbedtls_ssl_config' to enable 2223 suppressing the CA list in Certificate Request messages. The default 2224 behaviour has not changed, namely every configured CAs name is included. 2225 2226API Changes 2227 * The following functions in the AES module have been deprecated and replaced 2228 by the functions shown below. The new functions change the return type from 2229 void to int to allow returning error codes when using MBEDTLS_AES_ALT, 2230 MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT. 2231 mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt() 2232 mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt() 2233 2234Bugfix 2235 * Remove macros from compat-1.3.h that correspond to deleted items from most 2236 recent versions of the library. Found by Kyle Keen. 2237 * Fixed issue in the Threading module that prevented mutexes from 2238 initialising. Found by sznaider. #667 #843 2239 * Add checks in the PK module for the RSA functions on 64-bit systems. 2240 The PK and RSA modules use different types for passing hash length and 2241 without these checks the type cast could lead to data loss. Found by Guido 2242 Vranken. 2243 2244= mbed TLS 2.4.2 branch released 2017-03-08 2245 2246Security 2247 * Add checks to prevent signature forgeries for very large messages while 2248 using RSA through the PK module in 64-bit systems. The issue was caused by 2249 some data loss when casting a size_t to an unsigned int value in the 2250 functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and 2251 mbedtls_pk_sign(). Found by Jean-Philippe Aumasson. 2252 * Fixed potential livelock during the parsing of a CRL in PEM format in 2253 mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing 2254 characters after the footer could result in the execution of an infinite 2255 loop. The issue can be triggered remotely. Found by Greg Zaverucha, 2256 Microsoft. 2257 * Removed MD5 from the allowed hash algorithms for CertificateRequest and 2258 CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2. 2259 Introduced by interoperability fix for #513. 2260 * Fixed a bug that caused freeing a buffer that was allocated on the stack, 2261 when verifying the validity of a key on secp224k1. This could be 2262 triggered remotely for example with a maliciously constructed certificate 2263 and potentially could lead to remote code execution on some platforms. 2264 Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos 2265 team. #569 CVE-2017-2784 2266 2267Bugfix 2268 * Fix output certificate verification flags set by x509_crt_verify_top() when 2269 traversing a chain of trusted CA. The issue would cause both flags, 2270 MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be 2271 set when the verification conditions are not met regardless of the cause. 2272 Found by Harm Verhagen and inestlerode. #665 #561 2273 * Fix the redefinition of macro ssl_set_bio to an undefined symbol 2274 mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it. 2275 Found by omlib-lin. #673 2276 * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and 2277 x509_csr.c that are reported when building mbed TLS with a config.h that 2278 does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562 2279 * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that 2280 would compare 64 bits of the record counter instead of 48 bits as indicated 2281 in RFC 6347 Section 4.3.1. This could cause the execution of the 2282 renegotiation routines at unexpected times when the protocol is DTLS. Found 2283 by wariua. #687 2284 * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing 2285 the input string in PEM format to extract the different components. Found 2286 by Eyal Itkin. 2287 * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could 2288 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 2289 * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could 2290 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 2291 * Fixed potential arithmetic overflow in mbedtls_md2_update() that could 2292 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 2293 * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could 2294 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 2295 * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng 2296 Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America. 2297 * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused 2298 by missing calls to mbedtls_pem_free() in cases when a 2299 MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and 2300 fix proposed by Guido Vranken. #722 2301 * Fixed the templates used to generate project and solution files for Visual 2302 Studio 2015 as well as the files themselves, to remove a build warning 2303 generated in Visual Studio 2015. Reported by Steve Valliere. #742 2304 * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C. 2305 Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771 2306 * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI 2307 number to write in hexadecimal is negative and requires an odd number of 2308 digits. Found and fixed by Guido Vranken. 2309 * Fix unlisted DES configuration dependency in some pkparse test cases. Found 2310 by inestlerode. #555 2311 2312= mbed TLS 2.4.1 branch released 2016-12-13 2313 2314Changes 2315 * Update to CMAC test data, taken from - NIST Special Publication 800-38B - 2316 Recommendation for Block Cipher Modes of Operation: The CMAC Mode for 2317 Authentication – October 2016 2318 2319= mbed TLS 2.4.0 branch released 2016-10-17 2320 2321Security 2322 * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant 2323 with RFC-5116 and could lead to session key recovery in very long TLS 2324 sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in 2325 TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic. 2326 https://eprint.iacr.org/2016/475.pdf 2327 * Fixed potential stack corruption in mbedtls_x509write_crt_der() and 2328 mbedtls_x509write_csr_der() when the signature is copied to the buffer 2329 without checking whether there is enough space in the destination. The 2330 issue cannot be triggered remotely. Found by Jethro Beekman. 2331 2332Features 2333 * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by 2334 NIST SP 800-38B, RFC-4493 and RFC-4615. 2335 * Added hardware entropy selftest to verify that the hardware entropy source 2336 is functioning correctly. 2337 * Added a script to print build environment info for diagnostic use in test 2338 scripts, which is also now called by all.sh. 2339 * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to 2340 configure the maximum length of a file path that can be buffered when 2341 calling mbedtls_x509_crt_parse_path(). 2342 * Added a configuration file config-no-entropy.h that configures the subset of 2343 library features that do not require an entropy source. 2344 * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users 2345 to configure the minimum number of bytes for entropy sources using the 2346 mbedtls_hardware_poll() function. 2347 2348Bugfix 2349 * Fix for platform time abstraction to avoid dependency issues where a build 2350 may need time but not the standard C library abstraction, and added 2351 configuration consistency checks to check_config.h 2352 * Fix dependency issue in Makefile to allow parallel builds. 2353 * Fix incorrect handling of block lengths in crypt_and_hash.c sample program, 2354 when GCM is used. Found by udf2457. #441 2355 * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't 2356 enabled unless others were also present. Found by David Fernandez. #428 2357 * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on 2358 a contribution from Tobias Tangemann. #541 2359 * Fixed cert_app.c sample program for debug output and for use when no root 2360 certificates are provided. 2361 * Fix conditional statement that would cause a 1 byte overread in 2362 mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599 2363 * Fixed pthread implementation to avoid unintended double initialisations 2364 and double frees. Found by Niklas Amnebratt. 2365 * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for 2366 builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found 2367 by inestlerode. #559. 2368 * Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf 2369 data structure until after error checks are successful. Found by 2370 subramanyam-c. #622 2371 * Fix documentation and implementation missmatch for function arguments of 2372 mbedtls_gcm_finish(). Found by cmiatpaar. #602 2373 * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558 2374 * Fix potential byte overread when verifying malformed SERVER_HELLO in 2375 ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken. 2376 * Fix check for validity of date when parsing in mbedtls_x509_get_time(). 2377 Found by subramanyam-c. #626 2378 * Fix compatibility issue with Internet Explorer client authentication, 2379 where the limited hash choices prevented the client from sending its 2380 certificate. Found by teumas. #513 2381 * Fix compilation without MBEDTLS_SELF_TEST enabled. 2382 2383Changes 2384 * Extended test coverage of special cases, and added new timing test suite. 2385 * Removed self-tests from the basic-built-test.sh script, and added all 2386 missing self-tests to the test suites, to ensure self-tests are only 2387 executed once. 2388 * Added support for 3 and 4 byte lengths to mbedtls_asn1_write_len(). 2389 * Added support for a Yotta specific configuration file - 2390 through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE. 2391 * Added optimization for code space for X.509/OID based on configured 2392 features. Contributed by Aviv Palivoda. 2393 * Renamed source file library/net.c to library/net_sockets.c to avoid 2394 naming collision in projects which also have files with the common name 2395 net.c. For consistency, the corresponding header file, net.h, is marked as 2396 deprecated, and its contents moved to net_sockets.h. 2397 * Changed the strategy for X.509 certificate parsing and validation, to no 2398 longer disregard certificates with unrecognised fields. 2399 2400= mbed TLS 2.3.0 branch released 2016-06-28 2401 2402Security 2403 * Fix missing padding length check in mbedtls_rsa_rsaes_pkcs1_v15_decrypt 2404 required by PKCS1 v2.2 2405 * Fix potential integer overflow to buffer overflow in 2406 mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt 2407 (not triggerable remotely in (D)TLS). 2408 * Fix a potential integer underflow to buffer overread in 2409 mbedtls_rsa_rsaes_oaep_decrypt. It is not triggerable remotely in 2410 SSL/TLS. 2411 2412Features 2413 * Support for platform abstraction of the standard C library time() 2414 function. 2415 2416Bugfix 2417 * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three 2418 arguments where the same (in-place doubling). Found and fixed by Janos 2419 Follath. #309 2420 * Fix potential build failures related to the 'apidoc' target, introduced 2421 in the previous patch release. Found by Robert Scheck. #390 #391 2422 * Fix issue in Makefile that prevented building using armar. #386 2423 * Fix memory leak that occurred only when ECJPAKE was enabled and ECDHE and 2424 ECDSA was disabled in config.h . The leak didn't occur by default. 2425 * Fix an issue that caused valid certificates to be rejected whenever an 2426 expired or not yet valid certificate was parsed before a valid certificate 2427 in the trusted certificate list. 2428 * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the 2429 buffer after DER certificates to be included in the raw representation. 2430 * Fix issue that caused a hang when generating RSA keys of odd bitlength 2431 * Fix bug in mbedtls_rsa_rsaes_pkcs1_v15_encrypt that made null pointer 2432 dereference possible. 2433 * Fix issue that caused a crash if invalid curves were passed to 2434 mbedtls_ssl_conf_curves. #373 2435 * Fix issue in ssl_fork_server which was preventing it from functioning. #429 2436 * Fix memory leaks in test framework 2437 * Fix test in ssl-opt.sh that does not run properly with valgrind 2438 * Fix unchecked calls to mmbedtls_md_setup(). Fix by Brian Murray. #502 2439 2440Changes 2441 * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5, 2442 don't use the optimized assembly for bignum multiplication. This removes 2443 the need to pass -fomit-frame-pointer to avoid a build error with -O0. 2444 * Disabled SSLv3 in the default configuration. 2445 * Optimized mbedtls_mpi_zeroize() for MPI integer size. (Fix by Alexey 2446 Skalozub). 2447 * Fix non-compliance server extension handling. Extensions for SSLv3 are now 2448 ignored, as required by RFC6101. 2449 2450= mbed TLS 2.2.1 released 2016-01-05 2451 2452Security 2453 * Fix potential double free when mbedtls_asn1_store_named_data() fails to 2454 allocate memory. Only used for certificate generation, not triggerable 2455 remotely in SSL/TLS. Found by Rafał Przywara. #367 2456 * Disable MD5 handshake signatures in TLS 1.2 by default to prevent the 2457 SLOTH attack on TLS 1.2 server authentication (other attacks from the 2458 SLOTH paper do not apply to any version of mbed TLS or PolarSSL). 2459 https://www.mitls.org/pages/attacks/SLOTH 2460 2461Bugfix 2462 * Fix over-restrictive length limit in GCM. Found by Andreas-N. #362 2463 * Fix bug in certificate validation that caused valid chains to be rejected 2464 when the first intermediate certificate has pathLenConstraint=0. Found by 2465 Nicholas Wilson. Introduced in mbed TLS 2.2.0. #280 2466 * Removed potential leak in mbedtls_rsa_rsassa_pkcs1_v15_sign(), found by 2467 JayaraghavendranK. #372 2468 * Fix suboptimal handling of unexpected records that caused interop issues 2469 with some peers over unreliable links. Avoid dropping an entire DTLS 2470 datagram if a single record in a datagram is unexpected, instead only 2471 drop the record and look at subsequent records (if any are present) in 2472 the same datagram. Found by jeannotlapin. #345 2473 2474= mbed TLS 2.2.0 released 2015-11-04 2475 2476Security 2477 * Fix potential double free if mbedtls_ssl_conf_psk() is called more than 2478 once and some allocation fails. Cannot be forced remotely. Found by Guido 2479 Vranken, Intelworks. 2480 * Fix potential heap corruption on Windows when 2481 mbedtls_x509_crt_parse_path() is passed a path longer than 2GB. Cannot be 2482 triggered remotely. Found by Guido Vranken, Intelworks. 2483 * Fix potential buffer overflow in some asn1_write_xxx() functions. 2484 Cannot be triggered remotely unless you create X.509 certificates based 2485 on untrusted input or write keys of untrusted origin. Found by Guido 2486 Vranken, Intelworks. 2487 * The X509 max_pathlen constraint was not enforced on intermediate 2488 certificates. Found by Nicholas Wilson, fix and tests provided by 2489 Janos Follath. #280 and #319 2490 2491Features 2492 * Experimental support for EC J-PAKE as defined in Thread 1.0.0. 2493 Disabled by default as the specification might still change. 2494 * Added a key extraction callback to accees the master secret and key 2495 block. (Potential uses include EAP-TLS and Thread.) 2496 2497Bugfix 2498 * Self-signed certificates were not excluded from pathlen counting, 2499 resulting in some valid X.509 being incorrectly rejected. Found and fix 2500 provided by Janos Follath. #319 2501 * Fix build error with configurations where ECDHE-PSK is the only key 2502 exchange. Found and fix provided by Chris Hammond. #270 2503 * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or 2504 ECHD-ECDSA if the only key exchange. Multiple reports. #310 2505 * Fixed a bug causing some handshakes to fail due to some non-fatal alerts 2506 not being properly ignored. Found by mancha and Kasom Koht-arsa, #308 2507 * mbedtls_x509_crt_verify(_with_profile)() now also checks the key type and 2508 size/curve against the profile. Before that, there was no way to set a 2509 minimum key size for end-entity certificates with RSA keys. Found by 2510 Matthew Page of Scannex Electronics Ltd. 2511 * Fix failures in MPI on Sparc(64) due to use of bad assembly code. 2512 Found by Kurt Danielson. #292 2513 * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314 2514 * Fix bug in ASN.1 encoding of booleans that caused generated CA 2515 certificates to be rejected by some applications, including OS X 2516 Keychain. Found and fixed by Jonathan Leroy, Inikup. 2517 2518Changes 2519 * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1 2520 or -1. 2521 2522= mbed TLS 2.1.2 released 2015-10-06 2523 2524Security 2525 * Added fix for CVE-2015-5291 to prevent heap corruption due to buffer 2526 overflow of the hostname or session ticket. Found by Guido Vranken, 2527 Intelworks. 2528 * Fix potential double-free if mbedtls_ssl_set_hs_psk() is called more than 2529 once in the same handhake and mbedtls_ssl_conf_psk() was used. 2530 Found and patch provided by Guido Vranken, Intelworks. Cannot be forced 2531 remotely. 2532 * Fix stack buffer overflow in pkcs12 decryption (used by 2533 mbedtls_pk_parse_key(file)() when the password is > 129 bytes. 2534 Found by Guido Vranken, Intelworks. Not triggerable remotely. 2535 * Fix potential buffer overflow in mbedtls_mpi_read_string(). 2536 Found by Guido Vranken, Intelworks. Not exploitable remotely in the context 2537 of TLS, but might be in other uses. On 32 bit machines, requires reading a 2538 string of close to or larger than 1GB to exploit; on 64 bit machines, would 2539 require reading a string of close to or larger than 2^62 bytes. 2540 * Fix potential random memory allocation in mbedtls_pem_read_buffer() 2541 on crafted PEM input data. Found and fix provided by Guido Vranken, 2542 Intelworks. Not triggerable remotely in TLS. Triggerable remotely if you 2543 accept PEM data from an untrusted source. 2544 * Fix possible heap buffer overflow in base64_encoded() when the input 2545 buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken, 2546 Intelworks. Not trigerrable remotely in TLS. 2547 * Fix potential double-free if mbedtls_conf_psk() is called repeatedly on 2548 the same mbedtls_ssl_config object and memory allocation fails. Found by 2549 Guido Vranken, Intelworks. Cannot be forced remotely. 2550 * Fix potential heap buffer overflow in servers that perform client 2551 authentication against a crafted CA cert. Cannot be triggered remotely 2552 unless you allow third parties to pick trust CAs for client auth. 2553 Found by Guido Vranken, Intelworks. 2554 2555Bugfix 2556 * Fix compile error in net.c with musl libc. Found and patch provided by 2557 zhasha (#278). 2558 * Fix macroization of 'inline' keyword when building as C++. (#279) 2559 2560Changes 2561 * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure 2562 domain names are compliant with RFC 1035. 2563 * Fixed paths for check_config.h in example config files. (Found by bachp) 2564 (#291) 2565 2566= mbed TLS 2.1.1 released 2015-09-17 2567 2568Security 2569 * Add countermeasure against Lenstra's RSA-CRT attack for PKCS#1 v1.5 2570 signatures. (Found by Florian Weimer, Red Hat.) 2571 https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ 2572 * Fix possible client-side NULL pointer dereference (read) when the client 2573 tries to continue the handshake after it failed (a misuse of the API). 2574 (Found and patch provided by Fabian Foerg, Gotham Digital Science using 2575 afl-fuzz.) 2576 2577Bugfix 2578 * Fix warning when using a 64bit platform. (found by embedthis) (#275) 2579 * Fix off-by-one error in parsing Supported Point Format extension that 2580 caused some handshakes to fail. 2581 2582Changes 2583 * Made X509 profile pointer const in mbedtls_ssl_conf_cert_profile() to allow 2584 use of mbedtls_x509_crt_profile_next. (found by NWilson) 2585 * When a client initiates a reconnect from the same port as a live 2586 connection, if cookie verification is available 2587 (MBEDTLS_SSL_DTLS_HELLO_VERIFY defined in config.h, and usable cookie 2588 callbacks set with mbedtls_ssl_conf_dtls_cookies()), this will be 2589 detected and mbedtls_ssl_read() will return 2590 MBEDTLS_ERR_SSL_CLIENT_RECONNECT - it is then possible to start a new 2591 handshake with the same context. (See RFC 6347 section 4.2.8.) 2592 2593= mbed TLS 2.1.0 released 2015-09-04 2594 2595Features 2596 * Added support for yotta as a build system. 2597 * Primary open source license changed to Apache 2.0 license. 2598 2599Bugfix 2600 * Fix segfault in the benchmark program when benchmarking DHM. 2601 * Fix build error with CMake and pre-4.5 versions of GCC (found by Hugo 2602 Leisink). 2603 * Fix bug when parsing a ServerHello without extensions (found by David 2604 Sears). 2605 * Fix bug in CMake lists that caused libmbedcrypto.a not to be installed 2606 (found by Benoit Lecocq). 2607 * Fix bug in Makefile that caused libmbedcrypto and libmbedx509 not to be 2608 installed (found by Rawi666). 2609 * Fix compile error with armcc 5 with --gnu option. 2610 * Fix bug in Makefile that caused programs not to be installed correctly 2611 (found by robotanarchy) (#232). 2612 * Fix bug in Makefile that prevented from installing without building the 2613 tests (found by robotanarchy) (#232). 2614 * Fix missing -static-libgcc when building shared libraries for Windows 2615 with make. 2616 * Fix link error when building shared libraries for Windows with make. 2617 * Fix error when loading libmbedtls.so. 2618 * Fix bug in mbedtls_ssl_conf_default() that caused the default preset to 2619 be always used (found by dcb314) (#235) 2620 * Fix bug in mbedtls_rsa_public() and mbedtls_rsa_private() that could 2621 result trying to unlock an unlocked mutex on invalid input (found by 2622 Fredrik Axelsson) (#257) 2623 * Fix -Wshadow warnings (found by hnrkp) (#240) 2624 * Fix memory corruption on client with overlong PSK identity, around 2625 SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by 2626 Aleksandrs Saveljevs) (#238) 2627 * Fix unused function warning when using MBEDTLS_MDx_ALT or 2628 MBEDTLS_SHAxxx_ALT (found by Henrik) (#239) 2629 * Fix memory corruption in pkey programs (found by yankuncheng) (#210) 2630 2631Changes 2632 * The PEM parser now accepts a trailing space at end of lines (#226). 2633 * It is now possible to #include a user-provided configuration file at the 2634 end of the default config.h by defining MBEDTLS_USER_CONFIG_FILE on the 2635 compiler's command line. 2636 * When verifying a certificate chain, if an intermediate certificate is 2637 trusted, no later cert is checked. (suggested by hannes-landeholm) 2638 (#220). 2639 * Prepend a "thread identifier" to debug messages (issue pointed out by 2640 Hugo Leisink) (#210). 2641 * Add mbedtls_ssl_get_max_frag_len() to query the current maximum fragment 2642 length. 2643 2644= mbed TLS 2.0.0 released 2015-07-13 2645 2646Features 2647 * Support for DTLS 1.0 and 1.2 (RFC 6347). 2648 * Ability to override core functions from MDx, SHAx, AES and DES modules 2649 with custom implementation (eg hardware accelerated), complementing the 2650 ability to override the whole module. 2651 * New server-side implementation of session tickets that rotate keys to 2652 preserve forward secrecy, and allows sharing across multiple contexts. 2653 * Added a concept of X.509 cerificate verification profile that controls 2654 which algorithms and key sizes (curves for ECDSA) are acceptable. 2655 * Expanded configurability of security parameters in the SSL module with 2656 mbedtls_ssl_conf_dhm_min_bitlen() and mbedtls_ssl_conf_sig_hashes(). 2657 * Introduced a concept of presets for SSL security-relevant configuration 2658 parameters. 2659 2660API Changes 2661 * The library has been split into libmbedcrypto, libmbedx509, libmbedtls. 2662 You now need to link to all of them if you use TLS for example. 2663 * All public identifiers moved to the mbedtls_* or MBEDTLS_* namespace. 2664 Some names have been further changed to make them more consistent. 2665 Migration helpers scripts/rename.pl and include/mbedtls/compat-1.3.h are 2666 provided. Full list of renamings in scripts/data_files/rename-1.3-2.0.txt 2667 * Renamings of fields inside structures, not covered by the previous list: 2668 mbedtls_cipher_info_t.key_length -> key_bitlen 2669 mbedtls_cipher_context_t.key_length -> key_bitlen 2670 mbedtls_ecp_curve_info.size -> bit_size 2671 * Headers are now found in the 'mbedtls' directory (previously 'polarssl'). 2672 * The following _init() functions that could return errors have 2673 been split into an _init() that returns void and another function that 2674 should generally be the first function called on this context after init: 2675 mbedtls_ssl_init() -> mbedtls_ssl_setup() 2676 mbedtls_ccm_init() -> mbedtls_ccm_setkey() 2677 mbedtls_gcm_init() -> mbedtls_gcm_setkey() 2678 mbedtls_hmac_drbg_init() -> mbedtls_hmac_drbg_seed(_buf)() 2679 mbedtls_ctr_drbg_init() -> mbedtls_ctr_drbg_seed() 2680 Note that for mbedtls_ssl_setup(), you need to be done setting up the 2681 ssl_config structure before calling it. 2682 * Most ssl_set_xxx() functions (all except ssl_set_bio(), ssl_set_hostname(), 2683 ssl_set_session() and ssl_set_client_transport_id(), plus 2684 ssl_legacy_renegotiation()) have been renamed to mbedtls_ssl_conf_xxx() 2685 (see rename.pl and compat-1.3.h above) and their first argument's type 2686 changed from ssl_context to ssl_config. 2687 * ssl_set_bio() changed signature (contexts merged, order switched, one 2688 additional callback for read-with-timeout). 2689 * The following functions have been introduced and must be used in callback 2690 implementations (SNI, PSK) instead of their *conf counterparts: 2691 mbedtls_ssl_set_hs_own_cert() 2692 mbedtls_ssl_set_hs_ca_chain() 2693 mbedtls_ssl_set_hs_psk() 2694 * mbedtls_ssl_conf_ca_chain() lost its last argument (peer_cn), now set 2695 using mbedtls_ssl_set_hostname(). 2696 * mbedtls_ssl_conf_session_cache() changed prototype (only one context 2697 pointer, parameters reordered). 2698 * On server, mbedtls_ssl_conf_session_tickets_cb() must now be used in 2699 place of mbedtls_ssl_conf_session_tickets() to enable session tickets. 2700 * The SSL debug callback gained two new arguments (file name, line number). 2701 * Debug modes were removed. 2702 * mbedtls_ssl_conf_truncated_hmac() now returns void. 2703 * mbedtls_memory_buffer_alloc_init() now returns void. 2704 * X.509 verification flags are now an uint32_t. Affect the signature of: 2705 mbedtls_ssl_get_verify_result() 2706 mbedtls_x509_ctr_verify_info() 2707 mbedtls_x509_crt_verify() (flags, f_vrfy -> needs to be updated) 2708 mbedtls_ssl_conf_verify() (f_vrfy -> needs to be updated) 2709 * The following functions changed prototype to avoid an in-out length 2710 parameter: 2711 mbedtls_base64_encode() 2712 mbedtls_base64_decode() 2713 mbedtls_mpi_write_string() 2714 mbedtls_dhm_calc_secret() 2715 * In the NET module, all "int" and "int *" arguments for file descriptors 2716 changed type to "mbedtls_net_context *". 2717 * net_accept() gained new arguments for the size of the client_ip buffer. 2718 * In the threading layer, mbedtls_mutex_init() and mbedtls_mutex_free() now 2719 return void. 2720 * ecdsa_write_signature() gained an additional md_alg argument and 2721 ecdsa_write_signature_det() was deprecated. 2722 * pk_sign() no longer accepts md_alg == POLARSSL_MD_NONE with ECDSA. 2723 * Last argument of x509_crt_check_key_usage() and 2724 mbedtls_x509write_crt_set_key_usage() changed from int to unsigned. 2725 * test_ca_list (from certs.h) is renamed to test_cas_pem and is only 2726 available if POLARSSL_PEM_PARSE_C is defined (it never worked without). 2727 * Test certificates in certs.c are no longer guaranteed to be nul-terminated 2728 strings; use the new *_len variables instead of strlen(). 2729 * Functions mbedtls_x509_xxx_parse(), mbedtls_pk_parse_key(), 2730 mbedtls_pk_parse_public_key() and mbedtls_dhm_parse_dhm() now expect the 2731 length parameter to include the terminating null byte for PEM input. 2732 * Signature of mpi_mul_mpi() changed to make the last argument unsigned 2733 * calloc() is now used instead of malloc() everywhere. API of platform 2734 layer and the memory_buffer_alloc module changed accordingly. 2735 (Thanks to Mansour Moufid for helping with the replacement.) 2736 * Change SSL_DISABLE_RENEGOTIATION config.h flag to SSL_RENEGOTIATION 2737 (support for renegotiation now needs explicit enabling in config.h). 2738 * Split MBEDTLS_HAVE_TIME into MBEDTLS_HAVE_TIME and MBEDTLS_HAVE_TIME_DATE 2739 in config.h 2740 * net_connect() and net_bind() have a new 'proto' argument to choose 2741 between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP. 2742 Their 'port' argument type is changed to a string. 2743 * Some constness fixes 2744 2745Removals 2746 * Removed mbedtls_ecp_group_read_string(). Only named groups are supported. 2747 * Removed mbedtls_ecp_sub() and mbedtls_ecp_add(), use 2748 mbedtls_ecp_muladd(). 2749 * Removed individual mdX_hmac, shaX_hmac, mdX_file and shaX_file functions 2750 (use generic functions from md.h) 2751 * Removed mbedtls_timing_msleep(). Use mbedtls_net_usleep() or a custom 2752 waiting function. 2753 * Removed test DHM parameters from the test certs module. 2754 * Removed the PBKDF2 module (use PKCS5). 2755 * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()). 2756 * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3). 2757 * Removed openssl.h (very partial OpenSSL compatibility layer). 2758 * Configuration options POLARSSL_HAVE_LONGLONG was removed (now always on). 2759 * Configuration options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 have 2760 been removed (compiler is required to support 32-bit operations). 2761 * Configuration option POLARSSL_HAVE_IPV6 was removed (always enabled). 2762 * Removed test program o_p_test, the script compat.sh does more. 2763 * Removed test program ssl_test, superseded by ssl-opt.sh. 2764 * Removed helper script active-config.pl 2765 2766New deprecations 2767 * md_init_ctx() is deprecated in favour of md_setup(), that adds a third 2768 argument (allowing memory savings if HMAC is not used) 2769 2770Semi-API changes (technically public, morally private) 2771 * Renamed a few headers to include _internal in the name. Those headers are 2772 not supposed to be included by users. 2773 * Changed md_info_t into an opaque structure (use md_get_xxx() accessors). 2774 * Changed pk_info_t into an opaque structure. 2775 * Changed cipher_base_t into an opaque structure. 2776 * Removed sig_oid2 and rename sig_oid1 to sig_oid in x509_crt and x509_crl. 2777 * x509_crt.key_usage changed from unsigned char to unsigned int. 2778 * Removed r and s from ecdsa_context 2779 * Removed mode from des_context and des3_context 2780 2781Default behavior changes 2782 * The default minimum TLS version is now TLS 1.0. 2783 * RC4 is now blacklisted by default in the SSL/TLS layer, and excluded from the 2784 default ciphersuite list returned by ssl_list_ciphersuites() 2785 * Support for receiving SSLv2 ClientHello is now disabled by default at 2786 compile time. 2787 * The default authmode for SSL/TLS clients is now REQUIRED. 2788 * Support for RSA_ALT contexts in the PK layer is now optional. Since is is 2789 enabled in the default configuration, this is only noticeable if using a 2790 custom config.h 2791 * Default DHM parameters server-side upgraded from 1024 to 2048 bits. 2792 * A minimum RSA key size of 2048 bits is now enforced during ceritificate 2793 chain verification. 2794 * Negotiation of truncated HMAC is now disabled by default on server too. 2795 * The following functions are now case-sensitive: 2796 mbedtls_cipher_info_from_string() 2797 mbedtls_ecp_curve_info_from_name() 2798 mbedtls_md_info_from_string() 2799 mbedtls_ssl_ciphersuite_from_string() 2800 mbedtls_version_check_feature() 2801 2802Requirement changes 2803 * The minimum MSVC version required is now 2010 (better C99 support). 2804 * The NET layer now unconditionnaly relies on getaddrinfo() and select(). 2805 * Compiler is required to support C99 types such as long long and uint32_t. 2806 2807API changes from the 1.4 preview branch 2808 * ssl_set_bio_timeout() was removed, split into mbedtls_ssl_set_bio() with 2809 new prototype, and mbedtls_ssl_set_read_timeout(). 2810 * The following functions now return void: 2811 mbedtls_ssl_conf_transport() 2812 mbedtls_ssl_conf_max_version() 2813 mbedtls_ssl_conf_min_version() 2814 * DTLS no longer hard-depends on TIMING_C, but uses a callback interface 2815 instead, see mbedtls_ssl_set_timer_cb(), with the Timing module providing 2816 an example implementation, see mbedtls_timing_delay_context and 2817 mbedtls_timing_set/get_delay(). 2818 * With UDP sockets, it is no longer necessary to call net_bind() again 2819 after a successful net_accept(). 2820 2821Changes 2822 * mbedtls_ctr_drbg_random() and mbedtls_hmac_drbg_random() are now 2823 thread-safe if MBEDTLS_THREADING_C is enabled. 2824 * Reduced ROM fooprint of SHA-256 and added an option to reduce it even 2825 more (at the expense of performance) MBEDTLS_SHA256_SMALLER. 2826 2827= mbed TLS 1.3 branch 2828 2829Security 2830 * With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and 2831 extendedKeyUsage on the leaf certificate was lost (results not accessible 2832 via ssl_get_verify_results()). 2833 * Add countermeasure against "Lucky 13 strikes back" cache-based attack, 2834 https://dl.acm.org/citation.cfm?id=2714625 2835 2836Features 2837 * Improve ECC performance by using more efficient doubling formulas 2838 (contributed by Peter Dettman). 2839 * Add x509_crt_verify_info() to display certificate verification results. 2840 * Add support for reading DH parameters with privateValueLength included 2841 (contributed by Daniel Kahn Gillmor). 2842 * Add support for bit strings in X.509 names (request by Fredrik Axelsson). 2843 * Add support for id-at-uniqueIdentifier in X.509 names. 2844 * Add support for overriding snprintf() (except on Windows) and exit() in 2845 the platform layer. 2846 * Add an option to use macros instead of function pointers in the platform 2847 layer (helps get rid of unwanted references). 2848 * Improved Makefiles for Windows targets by fixing library targets and making 2849 cross-compilation easier (thanks to Alon Bar-Lev). 2850 * The benchmark program also prints heap usage for public-key primitives 2851 if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined. 2852 * New script ecc-heap.sh helps measuring the impact of ECC parameters on 2853 speed and RAM (heap only for now) usage. 2854 * New script memory.sh helps measuring the ROM and RAM requirements of two 2855 reduced configurations (PSK-CCM and NSA suite B). 2856 * Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce 2857 warnings on use of deprecated functions (with GCC and Clang only). 2858 * Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce 2859 errors on use of deprecated functions. 2860 2861Bugfix 2862 * Fix compile errors with PLATFORM_NO_STD_FUNCTIONS. 2863 * Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara). 2864 * Fix bug in entropy.c when THREADING_C is also enabled that caused 2865 entropy_free() to crash (thanks to Rafał Przywara). 2866 * Fix memory leak when gcm_setkey() and ccm_setkey() are used more than 2867 once on the same context. 2868 * Fix bug in ssl_mail_client when password is longer that username (found 2869 by Bruno Pape). 2870 * Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules 2871 (detected by Clang's 3.6 UBSan). 2872 * mpi_size() and mpi_msb() would segfault when called on an mpi that is 2873 initialized but not set (found by pravic). 2874 * Fix detection of support for getrandom() on Linux (reported by syzzer) by 2875 doing it at runtime (using uname) rather that compile time. 2876 * Fix handling of symlinks by "make install" (found by Gaël PORTAY). 2877 * Fix potential NULL pointer dereference (not trigerrable remotely) when 2878 ssl_write() is called before the handshake is finished (introduced in 2879 1.3.10) (first reported by Martin Blumenstingl). 2880 * Fix bug in pk_parse_key() that caused some valid private EC keys to be 2881 rejected. 2882 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos). 2883 * Fix thread safety bug in RSA operations (found by Fredrik Axelsson). 2884 * Fix hardclock() (only used in the benchmarking program) with some 2885 versions of mingw64 (found by kxjhlele). 2886 * Fix warnings from mingw64 in timing.c (found by kxjklele). 2887 * Fix potential unintended sign extension in asn1_get_len() on 64-bit 2888 platforms. 2889 * Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid). 2890 * Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and 2891 POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced 2892 in 1.3.10). 2893 * Add missing extern "C" guard in aesni.h (reported by amir zamani). 2894 * Add missing dependency on SHA-256 in some x509 programs (reported by 2895 Gergely Budai). 2896 * Fix bug related to ssl_set_curves(): the client didn't check that the 2897 curve picked by the server was actually allowed. 2898 2899Changes 2900 * Remove bias in mpi_gen_prime (contributed by Pascal Junod). 2901 * Remove potential sources of timing variations (some contributed by Pascal 2902 Junod). 2903 * Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated. 2904 * Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated. 2905 * compat-1.2.h and openssl.h are deprecated. 2906 * Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now 2907 more flexible (warning: OFLAGS is not used any more) (see the README) 2908 (contributed by Alon Bar-Lev). 2909 * ssl_set_own_cert() no longer calls pk_check_pair() since the 2910 performance impact was bad for some users (this was introduced in 1.3.10). 2911 * Move from SHA-1 to SHA-256 in example programs using signatures 2912 (suggested by Thorsten Mühlfelder). 2913 * Remove some unneeded inclusions of header files from the standard library 2914 "minimize" others (eg use stddef.h if only size_t is needed). 2915 * Change #include lines in test files to use double quotes instead of angle 2916 brackets for uniformity with the rest of the code. 2917 * Remove dependency on sscanf() in X.509 parsing modules. 2918 2919= mbed TLS 1.3.10 released 2015-02-09 2920Security 2921 * NULL pointer dereference in the buffer-based allocator when the buffer is 2922 full and polarssl_free() is called (found by Mark Hasemeyer) 2923 (only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is 2924 not by default). 2925 * Fix remotely-triggerable uninitialised pointer dereference caused by 2926 crafted X.509 certificate (TLS server is not affected if it doesn't ask for a 2927 client certificate) (found using Codenomicon Defensics). 2928 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates 2929 (TLS server is not affected if it doesn't ask for a client certificate) 2930 (found using Codenomicon Defensics). 2931 * Fix potential stack overflow while parsing crafted X.509 certificates 2932 (TLS server is not affected if it doesn't ask for a client certificate) 2933 (found using Codenomicon Defensics). 2934 * Fix timing difference that could theoretically lead to a 2935 Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges 2936 (reported by Sebastian Schinzel). 2937 2938Features 2939 * Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv). 2940 * Add support for Extended Master Secret (draft-ietf-tls-session-hash). 2941 * Add support for Encrypt-then-MAC (RFC 7366). 2942 * Add function pk_check_pair() to test if public and private keys match. 2943 * Add x509_crl_parse_der(). 2944 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the 2945 length of an X.509 verification chain. 2946 * Support for renegotiation can now be disabled at compile-time 2947 * Support for 1/n-1 record splitting, a countermeasure against BEAST. 2948 * Certificate selection based on signature hash, preferring SHA-1 over SHA-2 2949 for pre-1.2 clients when multiple certificates are available. 2950 * Add support for getrandom() syscall on recent Linux kernels with Glibc or 2951 a compatible enough libc (eg uClibc). 2952 * Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime 2953 while using the default ciphersuite list. 2954 * Added new error codes and debug messages about selection of 2955 ciphersuite/certificate. 2956 2957Bugfix 2958 * Stack buffer overflow if ctr_drbg_update() is called with too large 2959 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely). 2960 * Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE 2961 if memory_buffer_alloc_init() was called with buf not aligned and len not 2962 a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely). 2963 * User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found 2964 by Julian Ospald). 2965 * Fix potential undefined behaviour in Camellia. 2966 * Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a 2967 multiple of 8 (found by Gergely Budai). 2968 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by 2969 Peter Vaskovic). 2970 * Fix assembly selection for MIPS64 (thanks to James Cowgill). 2971 * ssl_get_verify_result() now works even if the handshake was aborted due 2972 to a failed verification (found by Fredrik Axelsson). 2973 * Skip writing and parsing signature_algorithm extension if none of the 2974 key exchanges enabled needs certificates. This fixes a possible interop 2975 issue with some servers when a zero-length extension was sent. (Reported 2976 by Peter Dettman.) 2977 * On a 0-length input, base64_encode() did not correctly set output length 2978 (found by Hendrik van den Boogaard). 2979 2980Changes 2981 * Use deterministic nonces for AEAD ciphers in TLS by default (possible to 2982 switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h). 2983 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined. 2984 * ssl_set_own_cert() now returns an error on key-certificate mismatch. 2985 * Forbid repeated extensions in X.509 certificates. 2986 * debug_print_buf() now prints a text view in addition to hexadecimal. 2987 * A specific error is now returned when there are ciphersuites in common 2988 but none of them is usable due to external factors such as no certificate 2989 with a suitable (extended)KeyUsage or curve or no PSK set. 2990 * It is now possible to disable negotiation of truncated HMAC server-side 2991 at runtime with ssl_set_truncated_hmac(). 2992 * Example programs for SSL client and server now disable SSLv3 by default. 2993 * Example programs for SSL client and server now disable RC4 by default. 2994 * Use platform.h in all test suites and programs. 2995 2996= PolarSSL 1.3.9 released 2014-10-20 2997Security 2998 * Lowest common hash was selected from signature_algorithms extension in 2999 TLS 1.2 (found by Darren Bane) (introduced in 1.3.8). 3000 * Remotely-triggerable memory leak when parsing some X.509 certificates 3001 (server is not affected if it doesn't ask for a client certificate) 3002 (found using Codenomicon Defensics). 3003 * Remotely-triggerable memory leak when parsing crafted ClientHello 3004 (not affected if ECC support was compiled out) (found using Codenomicon 3005 Defensics). 3006 3007Bugfix 3008 * Support escaping of commas in x509_string_to_names() 3009 * Fix compile error in ssl_pthread_server (found by Julian Ospald). 3010 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce). 3011 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel). 3012 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp). 3013 * Fix compile error in timing.c when POLARSSL_NET_C and POLARSSL_SELFTEST 3014 are defined but not POLARSSL_HAVE_TIME (found by Stephane Di Vito). 3015 * Remove non-existent file from VS projects (found by Peter Vaskovic). 3016 * ssl_read() could return non-application data records on server while 3017 renegotation was pending, and on client when a HelloRequest was received. 3018 * Server-initiated renegotiation would fail with non-blocking I/O if the 3019 write callback returned WANT_WRITE when requesting renegotiation. 3020 * ssl_close_notify() could send more than one message in some circumstances 3021 with non-blocking I/O. 3022 * Fix compiler warnings on iOS (found by Sander Niemeijer). 3023 * x509_crt_parse() did not increase total_failed on PEM error 3024 * Fix compile error with armcc in mpi_is_prime() 3025 * Fix potential bad read in parsing ServerHello (found by Adrien 3026 Vialletelle). 3027 3028Changes 3029 * Ciphersuites using SHA-256 or SHA-384 now require TLS 1.x (there is no 3030 standard defining how to use SHA-2 with SSL 3.0). 3031 * Ciphersuites using RSA-PSK key exchange new require TLS 1.x (the spec is 3032 ambiguous on how to encode some packets with SSL 3.0). 3033 * Made buffer size in pk_write_(pub)key_pem() more dynamic, eg smaller if 3034 RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger. 3035 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than 3036 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts. 3037 * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits 3038 RSA keys. 3039 * Accept spaces at end of line or end of buffer in base64_decode(). 3040 * X.509 certificates with more than one AttributeTypeAndValue per 3041 RelativeDistinguishedName are not accepted any more. 3042 3043= PolarSSL 1.3.8 released 2014-07-11 3044Security 3045 * Fix length checking for AEAD ciphersuites (found by Codenomicon). 3046 It was possible to crash the server (and client) using crafted messages 3047 when a GCM suite was chosen. 3048 3049Features 3050 * Add CCM module and cipher mode to Cipher Layer 3051 * Support for CCM and CCM_8 ciphersuites 3052 * Support for parsing and verifying RSASSA-PSS signatures in the X.509 3053 modules (certificates, CRLs and CSRs). 3054 * Blowfish in the cipher layer now supports variable length keys. 3055 * Add example config.h for PSK with CCM, optimized for low RAM usage. 3056 * Optimize for RAM usage in example config.h for NSA Suite B profile. 3057 * Add POLARSSL_REMOVE_ARC4_CIPHERSUITES to allow removing RC4 ciphersuites 3058 from the default list (inactive by default). 3059 * Add server-side enforcement of sent renegotiation requests 3060 (ssl_set_renegotiation_enforced()) 3061 * Add SSL_CIPHERSUITES config.h flag to allow specifying a list of 3062 ciphersuites to use and save some memory if the list is small. 3063 3064Changes 3065 * Add LINK_WITH_PTHREAD option in CMake for explicit linking that is 3066 required on some platforms (e.g. OpenBSD) 3067 * Migrate zeroizing of data to polarssl_zeroize() instead of memset() 3068 against unwanted compiler optimizations 3069 * md_list() now returns hashes strongest first 3070 * Selection of hash for signing ServerKeyExchange in TLS 1.2 now picks 3071 strongest offered by client. 3072 * All public contexts have _init() and _free() functions now for simpler 3073 usage pattern 3074 3075Bugfix 3076 * Fix in debug_print_msg() 3077 * Enforce alignment in the buffer allocator even if buffer is not aligned 3078 * Remove less-than-zero checks on unsigned numbers 3079 * Stricter check on SSL ClientHello internal sizes compared to actual packet 3080 size (found by TrustInSoft) 3081 * Fix WSAStartup() return value check (found by Peter Vaskovic) 3082 * Other minor issues (found by Peter Vaskovic) 3083 * Fix symlink command for cross compiling with CMake (found by Andre 3084 Heinecke) 3085 * Fix DER output of gen_key app (found by Gergely Budai) 3086 * Very small records were incorrectly rejected when truncated HMAC was in 3087 use with some ciphersuites and versions (RC4 in all versions, CBC with 3088 versions < TLS 1.1). 3089 * Very large records using more than 224 bytes of padding were incorrectly 3090 rejected with CBC-based ciphersuites and TLS >= 1.1 3091 * Very large records using less padding could cause a buffer overread of up 3092 to 32 bytes with CBC-based ciphersuites and TLS >= 1.1 3093 * Restore ability to use a v1 cert as a CA if trusted locally. (This had 3094 been removed in 1.3.6.) 3095 * Restore ability to locally trust a self-signed cert that is not a proper 3096 CA for use as an end entity certificate. (This had been removed in 3097 1.3.6.) 3098 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan). 3099 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers 3100 interpret semicolons as comment delimiters (found by Barry K. Nathan). 3101 * Fix off-by-one error in parsing Supported Point Format extension that 3102 caused some handshakes to fail. 3103 * Fix possible miscomputation of the premaster secret with DHE-PSK key 3104 exchange that caused some handshakes to fail with other implementations. 3105 (Failure rate <= 1/255 with common DHM moduli.) 3106 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser). 3107 * Fix base64_decode() to return and check length correctly (in case of 3108 tight buffers) 3109 * Fix mpi_write_string() to write "00" as hex output for empty MPI (found 3110 by Hui Dong) 3111 3112= PolarSSL 1.3.7 released on 2014-05-02 3113Features 3114 * debug_set_log_mode() added to determine raw or full logging 3115 * debug_set_threshold() added to ignore messages over threshold level 3116 * version_check_feature() added to check for compile-time options at 3117 run-time 3118 3119Changes 3120 * POLARSSL_CONFIG_OPTIONS has been removed. All values are individually 3121 checked and filled in the relevant module headers 3122 * Debug module only outputs full lines instead of parts 3123 * Better support for the different Attribute Types from IETF PKIX (RFC 5280) 3124 * AES-NI now compiles with "old" assemblers too 3125 * Ciphersuites based on RC4 now have the lowest priority by default 3126 3127Bugfix 3128 * Only iterate over actual certificates in ssl_write_certificate_request() 3129 (found by Matthew Page) 3130 * Typos in platform.c and pkcs11.c (found by Daniel Phillips and Steffan 3131 Karger) 3132 * cert_write app should use subject of issuer certificate as issuer of cert 3133 * Fix false reject in padding check in ssl_decrypt_buf() for CBC 3134 ciphersuites, for full SSL frames of data. 3135 * Improve interoperability by not writing extension length in ClientHello / 3136 ServerHello when no extensions are present (found by Matthew Page) 3137 * rsa_check_pubkey() now allows an E up to N 3138 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings 3139 * mpi_fill_random() was creating numbers larger than requested on 3140 big-endian platform when size was not an integer number of limbs 3141 * Fix dependencies issues in X.509 test suite. 3142 * Some parts of ssl_tls.c were compiled even when the module was disabled. 3143 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer) 3144 * Fix detection of Clang on some Apple platforms with CMake 3145 (found by Barry K. Nathan) 3146 3147= PolarSSL 1.3.6 released on 2014-04-11 3148 3149Features 3150 * Support for the ALPN SSL extension 3151 * Add option 'use_dev_random' to gen_key application 3152 * Enable verification of the keyUsage extension for CA and leaf 3153 certificates (POLARSSL_X509_CHECK_KEY_USAGE) 3154 * Enable verification of the extendedKeyUsage extension 3155 (POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE) 3156 3157Changes 3158 * x509_crt_info() now prints information about parsed extensions as well 3159 * pk_verify() now returns a specific error code when the signature is valid 3160 but shorter than the supplied length. 3161 * Use UTC time to check certificate validity. 3162 * Reject certificates with times not in UTC, per RFC 5280. 3163 3164Security 3165 * Avoid potential timing leak in ecdsa_sign() by blinding modular division. 3166 (Found by Watson Ladd.) 3167 * The notAfter date of some certificates was no longer checked since 1.3.5. 3168 This affects certificates in the user-supplied chain except the top 3169 certificate. If the user-supplied chain contains only one certificates, 3170 it is not affected (ie, its notAfter date is properly checked). 3171 * Prevent potential NULL pointer dereference in ssl_read_record() (found by 3172 TrustInSoft) 3173 3174Bugfix 3175 * The length of various ClientKeyExchange messages was not properly checked. 3176 * Some example server programs were not sending the close_notify alert. 3177 * Potential memory leak in mpi_exp_mod() when error occurs during 3178 calculation of RR. 3179 * Fixed malloc/free default #define in platform.c (found by Gergely Budai). 3180 * Fixed type which made POLARSSL_ENTROPY_FORCE_SHA256 uneffective (found by 3181 Gergely Budai). 3182 * Fix #include path in ecdsa.h which wasn't accepted by some compilers. 3183 (found by Gergely Budai) 3184 * Fix compile errors when POLARSSL_ERROR_STRERROR_BC is undefined (found by 3185 Shuo Chen). 3186 * oid_get_numeric_string() used to truncate the output without returning an 3187 error if the output buffer was just 1 byte too small. 3188 * dhm_parse_dhm() (hence dhm_parse_dhmfile()) did not set dhm->len. 3189 * Calling pk_debug() on an RSA-alt key would segfault. 3190 * pk_get_size() and pk_get_len() were off by a factor 8 for RSA-alt keys. 3191 * Potential buffer overwrite in pem_write_buffer() because of low length 3192 indication (found by Thijs Alkemade) 3193 * EC curves constants, which should be only in ROM since 1.3.3, were also 3194 stored in RAM due to missing 'const's (found by Gergely Budai). 3195 3196= PolarSSL 1.3.5 released on 2014-03-26 3197Features 3198 * HMAC-DRBG as a separate module 3199 * Option to set the Curve preference order (disabled by default) 3200 * Single Platform compatilibity layer (for memory / printf / fprintf) 3201 * Ability to provide alternate timing implementation 3202 * Ability to force the entropy module to use SHA-256 as its basis 3203 (POLARSSL_ENTROPY_FORCE_SHA256) 3204 * Testing script ssl-opt.sh added for testing 'live' ssl option 3205 interoperability against OpenSSL and PolarSSL 3206 * Support for reading EC keys that use SpecifiedECDomain in some cases. 3207 * Entropy module now supports seed writing and reading 3208 3209Changes 3210 * Deprecated the Memory layer 3211 * entropy_add_source(), entropy_update_manual() and entropy_gather() 3212 now thread-safe if POLARSSL_THREADING_C defined 3213 * Improvements to the CMake build system, contributed by Julian Ospald. 3214 * Work around a bug of the version of Clang shipped by Apple with Mavericks 3215 that prevented bignum.c from compiling. (Reported by Rafael Baptista.) 3216 * Revamped the compat.sh interoperatibility script to include support for 3217 testing against GnuTLS 3218 * Deprecated ssl_set_own_cert_rsa() and ssl_set_own_cert_rsa_alt() 3219 * Improvements to tests/Makefile, contributed by Oden Eriksson. 3220 3221Security 3222 * Forbid change of server certificate during renegotiation to prevent 3223 "triple handshake" attack when authentication mode is 'optional' (the 3224 attack was already impossible when authentication is required). 3225 * Check notBefore timestamp of certificates and CRLs from the future. 3226 * Forbid sequence number wrapping 3227 * Fixed possible buffer overflow with overlong PSK 3228 * Possible remotely-triggered out-of-bounds memory access fixed (found by 3229 TrustInSoft) 3230 3231Bugfix 3232 * ecp_gen_keypair() does more tries to prevent failure because of 3233 statistics 3234 * Fixed bug in RSA PKCS#1 v1.5 "reversed" operations 3235 * Fixed testing with out-of-source builds using cmake 3236 * Fixed version-major intolerance in server 3237 * Fixed CMake symlinking on out-of-source builds 3238 * Fixed dependency issues in test suite 3239 * Programs rsa_sign_pss and rsa_verify_pss were not using PSS since 1.3.0 3240 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by 3241 Alex Wilson.) 3242 * ssl_cache was creating entries when max_entries=0 if TIMING_C was enabled. 3243 * m_sleep() was sleeping twice too long on most Unix platforms. 3244 * Fixed bug with session tickets and non-blocking I/O in the unlikely case 3245 send() would return an EAGAIN error when sending the ticket. 3246 * ssl_cache was leaking memory when reusing a timed out entry containing a 3247 client certificate. 3248 * ssl_srv was leaking memory when client presented a timed out ticket 3249 containing a client certificate 3250 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of 3251 out_ctr failed 3252 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc 3253 of one of them failed 3254 * Fix typo in rsa_copy() that impacted PKCS#1 v2 contexts 3255 * x509_get_current_time() uses localtime_r() to prevent thread issues 3256 3257= PolarSSL 1.3.4 released on 2014-01-27 3258Features 3259 * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1 3260 * Support for RIPEMD-160 3261 * Support for AES CFB8 mode 3262 * Support for deterministic ECDSA (RFC 6979) 3263 3264Bugfix 3265 * Potential memory leak in bignum_selftest() 3266 * Replaced expired test certificate 3267 * ssl_mail_client now terminates lines with CRLF, instead of LF 3268 * net module handles timeouts on blocking sockets better (found by Tilman 3269 Sauerbeck) 3270 * Assembly format fixes in bn_mul.h 3271 3272Security 3273 * Missing MPI_CHK calls added around unguarded mpi calls (found by 3274 TrustInSoft) 3275 3276= PolarSSL 1.3.3 released on 2013-12-31 3277Features 3278 * EC key generation support in gen_key app 3279 * Support for adhering to client ciphersuite order preference 3280 (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE) 3281 * Support for Curve25519 3282 * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites 3283 * Support for IPv6 in the NET module 3284 * AES-NI support for AES, AES-GCM and AES key scheduling 3285 * SSL Pthread-based server example added (ssl_pthread_server) 3286 3287Changes 3288 * gen_prime() speedup 3289 * Speedup of ECP multiplication operation 3290 * Relaxed some SHA2 ciphersuite's version requirements 3291 * Dropped use of readdir_r() instead of readdir() with threading support 3292 * More constant-time checks in the RSA module 3293 * Split off curves from ecp.c into ecp_curves.c 3294 * Curves are now stored fully in ROM 3295 * Memory usage optimizations in ECP module 3296 * Removed POLARSSL_THREADING_DUMMY 3297 3298Bugfix 3299 * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int 3300 * Fixed X.509 hostname comparison (with non-regular characters) 3301 * SSL now gracefully handles missing RNG 3302 * Missing defines / cases for RSA_PSK key exchange 3303 * crypt_and_hash app checks MAC before final decryption 3304 * Potential memory leak in ssl_ticket_keys_init() 3305 * Memory leak in benchmark application 3306 * Fixed x509_crt_parse_path() bug on Windows platforms 3307 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by 3308 TrustInSoft) 3309 * Fixed potential overflow in certificate size verification in 3310 ssl_write_certificate() (found by TrustInSoft) 3311 3312Security 3313 * Possible remotely-triggered out-of-bounds memory access fixed (found by 3314 TrustInSoft) 3315 3316= PolarSSL 1.3.2 released on 2013-11-04 3317Features 3318 * PK tests added to test framework 3319 * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM) 3320 * Support for Camellia-GCM mode and ciphersuites 3321 3322Changes 3323 * Padding checks in cipher layer are now constant-time 3324 * Value comparisons in SSL layer are now constant-time 3325 * Support for serialNumber, postalAddress and postalCode in X509 names 3326 * SSL Renegotiation was refactored 3327 3328Bugfix 3329 * More stringent checks in cipher layer 3330 * Server does not send out extensions not advertised by client 3331 * Prevent possible alignment warnings on casting from char * to 'aligned *' 3332 * Misc fixes and additions to dependency checks 3333 * Const correctness 3334 * cert_write with selfsign should use issuer_name as subject_name 3335 * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon) 3336 * Defines to handle UEFI environment under MSVC 3337 * Server-side initiated renegotiations send HelloRequest 3338 3339= PolarSSL 1.3.1 released on 2013-10-15 3340Features 3341 * Support for Brainpool curves and TLS ciphersuites (RFC 7027) 3342 * Support for ECDHE-PSK key-exchange and ciphersuites 3343 * Support for RSA-PSK key-exchange and ciphersuites 3344 3345Changes 3346 * RSA blinding locks for a smaller amount of time 3347 * TLS compression only allocates working buffer once 3348 * Introduced POLARSSL_HAVE_READDIR_R for systems without it 3349 * config.h is more script-friendly 3350 3351Bugfix 3352 * Missing MSVC defines added 3353 * Compile errors with POLARSSL_RSA_NO_CRT 3354 * Header files with 'polarssl/' 3355 * Const correctness 3356 * Possible naming collision in dhm_context 3357 * Better support for MSVC 3358 * threading_set_alt() name 3359 * Added missing x509write_crt_set_version() 3360 3361= PolarSSL 1.3.0 released on 2013-10-01 3362Features 3363 * Elliptic Curve Cryptography module added 3364 * Elliptic Curve Diffie Hellman module added 3365 * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS 3366 (ECDHE-based ciphersuites) 3367 * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS 3368 (ECDSA-based ciphersuites) 3369 * Ability to specify allowed ciphersuites based on the protocol version. 3370 * PSK and DHE-PSK based ciphersuites added 3371 * Memory allocation abstraction layer added 3372 * Buffer-based memory allocator added (no malloc() / free() / HEAP usage) 3373 * Threading abstraction layer added (dummy / pthread / alternate) 3374 * Public Key abstraction layer added 3375 * Parsing Elliptic Curve keys 3376 * Parsing Elliptic Curve certificates 3377 * Support for max_fragment_length extension (RFC 6066) 3378 * Support for truncated_hmac extension (RFC 6066) 3379 * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros 3380 (ISO/IEC 7816-4) padding and zero padding in the cipher layer 3381 * Support for session tickets (RFC 5077) 3382 * Certificate Request (CSR) generation with extensions (key_usage, 3383 ns_cert_type) 3384 * X509 Certificate writing with extensions (basic_constraints, 3385 issuer_key_identifier, etc) 3386 * Optional blinding for RSA, DHM and EC 3387 * Support for multiple active certificate / key pairs in SSL servers for 3388 the same host (Not to be confused with SNI!) 3389 3390Changes 3391 * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2 3392 individually 3393 * Introduced separate SSL Ciphersuites module that is based on 3394 Cipher and MD information 3395 * Internals for SSL module adapted to have separate IV pointer that is 3396 dynamically set (Better support for hardware acceleration) 3397 * Moved all OID functionality to a separate module. RSA function 3398 prototypes for the RSA sign and verify functions changed as a result 3399 * Split up the GCM module into a starts/update/finish cycle 3400 * Client and server now filter sent and accepted ciphersuites on minimum 3401 and maximum protocol version 3402 * Ability to disable server_name extension (RFC 6066) 3403 * Renamed error_strerror() to the less conflicting polarssl_strerror() 3404 (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC) 3405 * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly 3406 * All RSA operations require a random generator for blinding purposes 3407 * X509 core refactored 3408 * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4) 3409 * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME) 3410 * Support faulty X509 v1 certificates with extensions 3411 (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3) 3412 3413Bugfix 3414 * Fixed parse error in ssl_parse_certificate_request() 3415 * zlib compression/decompression skipped on empty blocks 3416 * Support for AIX header locations in net.c module 3417 * Fixed file descriptor leaks 3418 3419Security 3420 * RSA blinding on CRT operations to counter timing attacks 3421 (found by Cyril Arnaud and Pierre-Alain Fouque) 3422 3423 3424= Version 1.2.14 released 2015-05-?? 3425 3426Security 3427 * Fix potential invalid memory read in the server, that allows a client to 3428 crash it remotely (found by Caj Larsson). 3429 * Fix potential invalid memory read in certificate parsing, that allows a 3430 client to crash the server remotely if client authentication is enabled 3431 (found using Codenomicon Defensics). 3432 * Add countermeasure against "Lucky 13 strikes back" cache-based attack, 3433 https://dl.acm.org/citation.cfm?id=2714625 3434 3435Bugfix 3436 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos). 3437 * Fix hardclock() (only used in the benchmarking program) with some 3438 versions of mingw64 (found by kxjhlele). 3439 * Fix warnings from mingw64 in timing.c (found by kxjklele). 3440 * Fix potential unintended sign extension in asn1_get_len() on 64-bit 3441 platforms (found with Coverity Scan). 3442 3443= Version 1.2.13 released 2015-02-16 3444Note: Although PolarSSL has been renamed to mbed TLS, no changes reflecting 3445 this will be made in the 1.2 branch at this point. 3446 3447Security 3448 * Fix remotely-triggerable uninitialised pointer dereference caused by 3449 crafted X.509 certificate (TLS server is not affected if it doesn't ask 3450 for a client certificate) (found using Codenomicon Defensics). 3451 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates 3452 (TLS server is not affected if it doesn't ask for a client certificate) 3453 (found using Codenomicon Defensics). 3454 * Fix potential stack overflow while parsing crafted X.509 certificates 3455 (TLS server is not affected if it doesn't ask for a client certificate) 3456 found using Codenomicon Defensics). 3457 * Fix buffer overread of size 1 when parsing crafted X.509 certificates 3458 (TLS server is not affected if it doesn't ask for a client certificate). 3459 3460Bugfix 3461 * Fix potential undefined behaviour in Camellia. 3462 * Fix memory leaks in PKCS#5 and PKCS#12. 3463 * Stack buffer overflow if ctr_drbg_update() is called with too large 3464 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely). 3465 * Fix bug in MPI/bignum on s390/s390x (reported by Dan Horák) (introduced 3466 in 1.2.12). 3467 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by 3468 Peter Vaskovic). 3469 * Fix assembly selection for MIPS64 (thanks to James Cowgill). 3470 * ssl_get_verify_result() now works even if the handshake was aborted due 3471 to a failed verification (found by Fredrik Axelsson). 3472 * Skip writing and parsing signature_algorithm extension if none of the 3473 key exchanges enabled needs certificates. This fixes a possible interop 3474 issue with some servers when a zero-length extension was sent. (Reported 3475 by Peter Dettman.) 3476 * On a 0-length input, base64_encode() did not correctly set output length 3477 (found by Hendrik van den Boogaard). 3478 3479Changes 3480 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined. 3481 * Forbid repeated extensions in X.509 certificates. 3482 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the 3483 length of an X.509 verification chain (default = 8). 3484= Version 1.2.12 released 2014-10-24 3485 3486Security 3487 * Remotely-triggerable memory leak when parsing some X.509 certificates 3488 (server is not affected if it doesn't ask for a client certificate). 3489 (Found using Codenomicon Defensics.) 3490 3491Bugfix 3492 * Fix potential bad read in parsing ServerHello (found by Adrien 3493 Vialletelle). 3494 * ssl_close_notify() could send more than one message in some circumstances 3495 with non-blocking I/O. 3496 * x509_crt_parse() did not increase total_failed on PEM error 3497 * Fix compiler warnings on iOS (found by Sander Niemeijer). 3498 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel). 3499 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce). 3500 * ssl_read() could return non-application data records on server while 3501 renegotation was pending, and on client when a HelloRequest was received. 3502 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp). 3503 3504Changes 3505 * X.509 certificates with more than one AttributeTypeAndValue per 3506 RelativeDistinguishedName are not accepted any more. 3507 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than 3508 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts. 3509 * Accept spaces at end of line or end of buffer in base64_decode(). 3510 3511= Version 1.2.11 released 2014-07-11 3512Features 3513 * Entropy module now supports seed writing and reading 3514 3515Changes 3516 * Introduced POLARSSL_HAVE_READDIR_R for systems without it 3517 * Improvements to the CMake build system, contributed by Julian Ospald. 3518 * Work around a bug of the version of Clang shipped by Apple with Mavericks 3519 that prevented bignum.c from compiling. (Reported by Rafael Baptista.) 3520 * Improvements to tests/Makefile, contributed by Oden Eriksson. 3521 * Use UTC time to check certificate validity. 3522 * Reject certificates with times not in UTC, per RFC 5280. 3523 * Migrate zeroizing of data to polarssl_zeroize() instead of memset() 3524 against unwanted compiler optimizations 3525 3526Security 3527 * Forbid change of server certificate during renegotiation to prevent 3528 "triple handshake" attack when authentication mode is optional (the 3529 attack was already impossible when authentication is required). 3530 * Check notBefore timestamp of certificates and CRLs from the future. 3531 * Forbid sequence number wrapping 3532 * Prevent potential NULL pointer dereference in ssl_read_record() (found by 3533 TrustInSoft) 3534 * Fix length checking for AEAD ciphersuites (found by Codenomicon). 3535 It was possible to crash the server (and client) using crafted messages 3536 when a GCM suite was chosen. 3537 3538Bugfix 3539 * Fixed X.509 hostname comparison (with non-regular characters) 3540 * SSL now gracefully handles missing RNG 3541 * crypt_and_hash app checks MAC before final decryption 3542 * Fixed x509_crt_parse_path() bug on Windows platforms 3543 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by 3544 TrustInSoft) 3545 * Fixed potential overflow in certificate size verification in 3546 ssl_write_certificate() (found by TrustInSoft) 3547 * Fix ASM format in bn_mul.h 3548 * Potential memory leak in bignum_selftest() 3549 * Replaced expired test certificate 3550 * ssl_mail_client now terminates lines with CRLF, instead of LF 3551 * Fix bug in RSA PKCS#1 v1.5 "reversed" operations 3552 * Fixed testing with out-of-source builds using cmake 3553 * Fixed version-major intolerance in server 3554 * Fixed CMake symlinking on out-of-source builds 3555 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by 3556 Alex Wilson.) 3557 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of 3558 out_ctr failed 3559 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc 3560 of one of them failed 3561 * x509_get_current_time() uses localtime_r() to prevent thread issues 3562 * Some example server programs were not sending the close_notify alert. 3563 * Potential memory leak in mpi_exp_mod() when error occurs during 3564 calculation of RR. 3565 * Improve interoperability by not writing extension length in ClientHello 3566 when no extensions are present (found by Matthew Page) 3567 * rsa_check_pubkey() now allows an E up to N 3568 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings 3569 * mpi_fill_random() was creating numbers larger than requested on 3570 big-endian platform when size was not an integer number of limbs 3571 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer) 3572 * Stricter check on SSL ClientHello internal sizes compared to actual packet 3573 size (found by TrustInSoft) 3574 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan). 3575 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers 3576 interpret semicolons as comment delimiters (found by Barry K. Nathan). 3577 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser). 3578 * Fix base64_decode() to return and check length correctly (in case of 3579 tight buffers) 3580 3581= Version 1.2.10 released 2013-10-07 3582Changes 3583 * Changed RSA blinding to a slower but thread-safe version 3584 3585Bugfix 3586 * Fixed memory leak in RSA as a result of introduction of blinding 3587 * Fixed ssl_pkcs11_decrypt() prototype 3588 * Fixed MSVC project files 3589 3590= Version 1.2.9 released 2013-10-01 3591Changes 3592 * x509_verify() now case insensitive for cn (RFC 6125 6.4) 3593 3594Bugfix 3595 * Fixed potential memory leak when failing to resume a session 3596 * Fixed potential file descriptor leaks (found by Remi Gacogne) 3597 * Minor fixes 3598 3599Security 3600 * Fixed potential heap buffer overflow on large hostname setting 3601 * Fixed potential negative value misinterpretation in load_file() 3602 * RSA blinding on CRT operations to counter timing attacks 3603 (found by Cyril Arnaud and Pierre-Alain Fouque) 3604 3605= Version 1.2.8 released 2013-06-19 3606Features 3607 * Parsing of PKCS#8 encrypted private key files 3608 * PKCS#12 PBE and derivation functions 3609 * Centralized module option values in config.h to allow user-defined 3610 settings without editing header files by using POLARSSL_CONFIG_OPTIONS 3611 3612Changes 3613 * HAVEGE random generator disabled by default 3614 * Internally split up x509parse_key() into a (PEM) handler function 3615 and specific DER parser functions for the PKCS#1 and unencrypted 3616 PKCS#8 private key formats 3617 * Added mechanism to provide alternative implementations for all 3618 symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in 3619 config.h) 3620 * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated 3621 old PBKDF2 module 3622 3623Bugfix 3624 * Secure renegotiation extension should only be sent in case client 3625 supports secure renegotiation 3626 * Fixed offset for cert_type list in ssl_parse_certificate_request() 3627 * Fixed const correctness issues that have no impact on the ABI 3628 * x509parse_crt() now better handles PEM error situations 3629 * ssl_parse_certificate() now calls x509parse_crt_der() directly 3630 instead of the x509parse_crt() wrapper that can also parse PEM 3631 certificates 3632 * x509parse_crtpath() is now reentrant and uses more portable stat() 3633 * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler 3634 * Fixed values for 2-key Triple DES in cipher layer 3635 * ssl_write_certificate_request() can handle empty ca_chain 3636 3637Security 3638 * A possible DoS during the SSL Handshake, due to faulty parsing of 3639 PEM-encoded certificates has been fixed (found by Jack Lloyd) 3640 3641= Version 1.2.7 released 2013-04-13 3642Features 3643 * Ability to specify allowed ciphersuites based on the protocol version. 3644 3645Changes 3646 * Default Blowfish keysize is now 128-bits 3647 * Test suites made smaller to accommodate Raspberry Pi 3648 3649Bugfix 3650 * Fix for MPI assembly for ARM 3651 * GCM adapted to support sizes > 2^29 3652 3653= Version 1.2.6 released 2013-03-11 3654Bugfix 3655 * Fixed memory leak in ssl_free() and ssl_reset() for active session 3656 * Corrected GCM counter incrementation to use only 32-bits instead of 3657 128-bits (found by Yawning Angel) 3658 * Fixes for 64-bit compilation with MS Visual Studio 3659 * Fixed net_bind() for specified IP addresses on little endian systems 3660 * Fixed assembly code for ARM (Thumb and regular) for some compilers 3661 3662Changes 3663 * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(), 3664 rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and 3665 PKCS#1 v2.1 functions 3666 * Added support for custom labels when using rsa_rsaes_oaep_encrypt() 3667 or rsa_rsaes_oaep_decrypt() 3668 * Re-added handling for SSLv2 Client Hello when the define 3669 POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set 3670 * The SSL session cache module (ssl_cache) now also retains peer_cert 3671 information (not the entire chain) 3672 3673Security 3674 * Removed further timing differences during SSL message decryption in 3675 ssl_decrypt_buf() 3676 * Removed timing differences due to bad padding from 3677 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5 3678 operations 3679 3680= Version 1.2.5 released 2013-02-02 3681Changes 3682 * Allow enabling of dummy error_strerror() to support some use-cases 3683 * Debug messages about padding errors during SSL message decryption are 3684 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 3685 * Sending of security-relevant alert messages that do not break 3686 interoperability can be switched on/off with the flag 3687 POLARSSL_SSL_ALL_ALERT_MESSAGES 3688 3689Security 3690 * Removed timing differences during SSL message decryption in 3691 ssl_decrypt_buf() due to badly formatted padding 3692 3693= Version 1.2.4 released 2013-01-25 3694Changes 3695 * More advanced SSL ciphersuite representation and moved to more dynamic 3696 SSL core 3697 * Added ssl_handshake_step() to allow single stepping the handshake process 3698 3699Bugfix 3700 * Memory leak when using RSA_PKCS_V21 operations fixed 3701 * Handle future version properly in ssl_write_certificate_request() 3702 * Correctly handle CertificateRequest message in client for <= TLS 1.1 3703 without DN list 3704 3705= Version 1.2.3 released 2012-11-26 3706Bugfix 3707 * Server not always sending correct CertificateRequest message 3708 3709= Version 1.2.2 released 2012-11-24 3710Changes 3711 * Added p_hw_data to ssl_context for context specific hardware acceleration 3712 data 3713 * During verify trust-CA is only checked for expiration and CRL presence 3714 3715Bugfixes 3716 * Fixed client authentication compatibility 3717 * Fixed dependency on POLARSSL_SHA4_C in SSL modules 3718 3719= Version 1.2.1 released 2012-11-20 3720Changes 3721 * Depth that the certificate verify callback receives is now numbered 3722 bottom-up (Peer cert depth is 0) 3723 3724Bugfixes 3725 * Fixes for MSVC6 3726 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME 3727 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel 3728 Pégourié-Gonnard) 3729 * Fixed possible segfault in mpi_shift_r() (found by Manuel 3730 Pégourié-Gonnard) 3731 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1 3732 3733= Version 1.2.0 released 2012-10-31 3734Features 3735 * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak 3736 ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by 3737 default! 3738 * Added support for wildcard certificates 3739 * Added support for multi-domain certificates through the X509 Subject 3740 Alternative Name extension 3741 * Added preliminary ASN.1 buffer writing support 3742 * Added preliminary X509 Certificate Request writing support 3743 * Added key_app_writer example application 3744 * Added cert_req example application 3745 * Added base Galois Counter Mode (GCM) for AES 3746 * Added TLS 1.2 support (RFC 5246) 3747 * Added GCM suites to TLS 1.2 (RFC 5288) 3748 * Added commandline error code convertor (util/strerror) 3749 * Added support for Hardware Acceleration hooking in SSL/TLS 3750 * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and 3751 example application (programs/ssl/o_p_test) (requires OpenSSL) 3752 * Added X509 CA Path support 3753 * Added Thumb assembly optimizations 3754 * Added DEFLATE compression support as per RFC3749 (requires zlib) 3755 * Added blowfish algorithm (Generic and cipher layer) 3756 * Added PKCS#5 PBKDF2 key derivation function 3757 * Added Secure Renegotiation (RFC 5746) 3758 * Added predefined DHM groups from RFC 5114 3759 * Added simple SSL session cache implementation 3760 * Added ServerName extension parsing (SNI) at server side 3761 * Added option to add minimum accepted SSL/TLS protocol version 3762 3763Changes 3764 * Removed redundant POLARSSL_DEBUG_MSG define 3765 * AES code only check for Padlock once 3766 * Fixed const-correctness mpi_get_bit() 3767 * Documentation for mpi_lsb() and mpi_msb() 3768 * Moved out_msg to out_hdr + 32 to support hardware acceleration 3769 * Changed certificate verify behaviour to comply with RFC 6125 section 6.3 3770 to not match CN if subjectAltName extension is present (Closes ticket #56) 3771 * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to 3772 POLARSSL_MODE_CFB, to also handle different block size CFB modes. 3773 * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation) 3774 * Revamped session resumption handling 3775 * Generalized external private key implementation handling (like PKCS#11) 3776 in SSL/TLS 3777 * Revamped x509_verify() and the SSL f_vrfy callback implementations 3778 * Moved from unsigned long to fixed width uint32_t types throughout code 3779 * Renamed ciphersuites naming scheme to IANA reserved names 3780 3781Bugfix 3782 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by 3783 Hui Dong) 3784 * Fixed potential heap corruption in x509_name allocation 3785 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54) 3786 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket 3787 #52) 3788 * Handle encryption with private key and decryption with public key as per 3789 RFC 2313 3790 * Handle empty certificate subject names 3791 * Prevent reading over buffer boundaries on X509 certificate parsing 3792 * mpi_add_abs() now correctly handles adding short numbers to long numbers 3793 with carry rollover (found by Ruslan Yushchenko) 3794 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob 3795 * Fixed MPI assembly for SPARC64 platform 3796 3797Security 3798 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi 3799 Vanderbeken) 3800 3801= Version 1.1.8 released on 2013-10-01 3802Bugfix 3803 * Fixed potential memory leak when failing to resume a session 3804 * Fixed potential file descriptor leaks 3805 3806Security 3807 * Potential buffer-overflow for ssl_read_record() (independently found by 3808 both TrustInSoft and Paul Brodeur of Leviathan Security Group) 3809 * Potential negative value misinterpretation in load_file() 3810 * Potential heap buffer overflow on large hostname setting 3811 3812= Version 1.1.7 released on 2013-06-19 3813Changes 3814 * HAVEGE random generator disabled by default 3815 3816Bugfix 3817 * x509parse_crt() now better handles PEM error situations 3818 * ssl_parse_certificate() now calls x509parse_crt_der() directly 3819 instead of the x509parse_crt() wrapper that can also parse PEM 3820 certificates 3821 * Fixed values for 2-key Triple DES in cipher layer 3822 * ssl_write_certificate_request() can handle empty ca_chain 3823 3824Security 3825 * A possible DoS during the SSL Handshake, due to faulty parsing of 3826 PEM-encoded certificates has been fixed (found by Jack Lloyd) 3827 3828= Version 1.1.6 released on 2013-03-11 3829Bugfix 3830 * Fixed net_bind() for specified IP addresses on little endian systems 3831 3832Changes 3833 * Allow enabling of dummy error_strerror() to support some use-cases 3834 * Debug messages about padding errors during SSL message decryption are 3835 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 3836 3837Security 3838 * Removed timing differences during SSL message decryption in 3839 ssl_decrypt_buf() 3840 * Removed timing differences due to bad padding from 3841 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5 3842 operations 3843 3844= Version 1.1.5 released on 2013-01-16 3845Bugfix 3846 * Fixed MPI assembly for SPARC64 platform 3847 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob 3848 * mpi_add_abs() now correctly handles adding short numbers to long numbers 3849 with carry rollover 3850 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME 3851 * Prevent reading over buffer boundaries on X509 certificate parsing 3852 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket 3853 #52) 3854 * Fixed possible segfault in mpi_shift_r() (found by Manuel 3855 Pégourié-Gonnard) 3856 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel 3857 Pégourié-Gonnard) 3858 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1 3859 * Memory leak when using RSA_PKCS_V21 operations fixed 3860 * Handle encryption with private key and decryption with public key as per 3861 RFC 2313 3862 * Fixes for MSVC6 3863 3864Security 3865 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi 3866 Vanderbeken) 3867 3868= Version 1.1.4 released on 2012-05-31 3869Bugfix 3870 * Correctly handle empty SSL/TLS packets (Found by James Yonan) 3871 * Fixed potential heap corruption in x509_name allocation 3872 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54) 3873 3874= Version 1.1.3 released on 2012-04-29 3875Bugfix 3876 * Fixed random MPI generation to not generate more size than requested. 3877 3878= Version 1.1.2 released on 2012-04-26 3879Bugfix 3880 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by 3881 Hui Dong) 3882 3883Security 3884 * Fixed potential memory corruption on miscrafted client messages (found by 3885 Frama-C team at CEA LIST) 3886 * Fixed generation of DHM parameters to correct length (found by Ruslan 3887 Yushchenko) 3888 3889= Version 1.1.1 released on 2012-01-23 3890Bugfix 3891 * Check for failed malloc() in ssl_set_hostname() and x509_get_entries() 3892 (Closes ticket #47, found by Hugo Leisink) 3893 * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50) 3894 * Fixed multiple compiler warnings for VS6 and armcc 3895 * Fixed bug in CTR_CRBG selftest 3896 3897= Version 1.1.0 released on 2011-12-22 3898Features 3899 * Added ssl_session_reset() to allow better multi-connection pools of 3900 SSL contexts without needing to set all non-connection-specific 3901 data and pointers again. Adapted ssl_server to use this functionality. 3902 * Added ssl_set_max_version() to allow clients to offer a lower maximum 3903 supported version to a server to help buggy server implementations. 3904 (Closes ticket #36) 3905 * Added cipher_get_cipher_mode() and cipher_get_cipher_operation() 3906 introspection functions (Closes ticket #40) 3907 * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator 3908 * Added a generic entropy accumulator that provides support for adding 3909 custom entropy sources and added some generic and platform dependent 3910 entropy sources 3911 3912Changes 3913 * Documentation for AES and Camellia in modes CTR and CFB128 clarified. 3914 * Fixed rsa_encrypt and rsa_decrypt examples to use public key for 3915 encryption and private key for decryption. (Closes ticket #34) 3916 * Inceased maximum size of ASN1 length reads to 32-bits. 3917 * Added an EXPLICIT tag number parameter to x509_get_ext() 3918 * Added a separate CRL entry extension parsing function 3919 * Separated the ASN.1 parsing code from the X.509 specific parsing code. 3920 So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C. 3921 * Changed the defined key-length of DES ciphers in cipher.h to include the 3922 parity bits, to prevent mistakes in copying data. (Closes ticket #33) 3923 * Loads of minimal changes to better support WINCE as a build target 3924 (Credits go to Marco Lizza) 3925 * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory 3926 trade-off 3927 * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size 3928 management (Closes ticket #44) 3929 * Changed the used random function pointer to more flexible format. Renamed 3930 havege_rand() to havege_random() to prevent mistakes. Lots of changes as 3931 a consequence in library code and programs 3932 * Moved all examples programs to use the new entropy and CTR_DRBG 3933 * Added permissive certificate parsing to x509parse_crt() and 3934 x509parse_crtfile(). With permissive parsing the parsing does not stop on 3935 encountering a parse-error. Beware that the meaning of return values has 3936 changed! 3937 * All error codes are now negative. Even on mermory failures and IO errors. 3938 3939Bugfix 3940 * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes 3941 ticket #37) 3942 * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag 3943 before version numbers 3944 * Allowed X509 key usage parsing to accept 4 byte values instead of the 3945 standard 1 byte version sometimes used by Microsoft. (Closes ticket #38) 3946 * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length 3947 smaller than the hash length. (Closes ticket #41) 3948 * If certificate serial is longer than 32 octets, serial number is now 3949 appended with '....' after first 28 octets 3950 * Improved build support for s390x and sparc64 in bignum.h 3951 * Fixed MS Visual C++ name clash with int64 in sha4.h 3952 * Corrected removal of leading "00:" in printing serial numbers in 3953 certificates and CRLs 3954 3955= Version 1.0.0 released on 2011-07-27 3956Features 3957 * Expanded cipher layer with support for CFB128 and CTR mode 3958 * Added rsa_encrypt and rsa_decrypt simple example programs. 3959 3960Changes 3961 * The generic cipher and message digest layer now have normal error 3962 codes instead of integers 3963 3964Bugfix 3965 * Undid faulty bug fix in ssl_write() when flushing old data (Ticket 3966 #18) 3967 3968= Version 0.99-pre5 released on 2011-05-26 3969Features 3970 * Added additional Cipher Block Modes to symmetric ciphers 3971 (AES CTR, Camellia CTR, XTEA CBC) including the option to 3972 enable and disable individual modes when needed 3973 * Functions requiring File System functions can now be disabled 3974 by undefining POLARSSL_FS_IO 3975 * A error_strerror function() has been added to translate between 3976 error codes and their description. 3977 * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter 3978 functions. 3979 * Added ssl_mail_client and ssl_fork_server as example programs. 3980 3981Changes 3982 * Major argument / variable rewrite. Introduced use of size_t 3983 instead of int for buffer lengths and loop variables for 3984 better unsigned / signed use. Renamed internal bigint types 3985 t_int and t_dbl to t_uint and t_udbl in the process 3986 * mpi_init() and mpi_free() now only accept a single MPI 3987 argument and do not accept variable argument lists anymore. 3988 * The error codes have been remapped and combining error codes 3989 is now done with a PLUS instead of an OR as error codes 3990 used are negative. 3991 * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv(). 3992 net_recv() now returns 0 on EOF instead of 3993 POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns 3994 POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function. 3995 ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received 3996 after the handshake. 3997 * Network functions now return POLARSSL_ERR_NET_WANT_READ or 3998 POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous 3999 POLARSSL_ERR_NET_TRY_AGAIN 4000 4001= Version 0.99-pre4 released on 2011-04-01 4002Features 4003 * Added support for PKCS#1 v2.1 encoding and thus support 4004 for the RSAES-OAEP and RSASSA-PSS operations. 4005 * Reading of Public Key files incorporated into default x509 4006 functionality as well. 4007 * Added mpi_fill_random() for centralized filling of big numbers 4008 with random data (Fixed ticket #10) 4009 4010Changes 4011 * Debug print of MPI now removes leading zero octets and 4012 displays actual bit size of the value. 4013 * x509parse_key() (and as a consequence x509parse_keyfile()) 4014 does not zeroize memory in advance anymore. Use rsa_init() 4015 before parsing a key or keyfile! 4016 4017Bugfix 4018 * Debug output of MPI's now the same independent of underlying 4019 platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads 4020 Kiilerich and Mihai Militaru) 4021 * Fixed bug in ssl_write() when flushing old data (Fixed ticket 4022 #18, found by Nikolay Epifanov) 4023 * Fixed proper handling of RSASSA-PSS verification with variable 4024 length salt lengths 4025 4026= Version 0.99-pre3 released on 2011-02-28 4027This release replaces version 0.99-pre2 which had possible copyright issues. 4028Features 4029 * Parsing PEM private keys encrypted with DES and AES 4030 are now supported as well (Fixes ticket #5) 4031 * Added crl_app program to allow easy reading and 4032 printing of X509 CRLs from file 4033 4034Changes 4035 * Parsing of PEM files moved to separate module (Fixes 4036 ticket #13). Also possible to remove PEM support for 4037 systems only using DER encoding 4038 4039Bugfixes 4040 * Corrected parsing of UTCTime dates before 1990 and 4041 after 1950 4042 * Support more exotic OID's when parsing certificates 4043 (found by Mads Kiilerich) 4044 * Support more exotic name representations when parsing 4045 certificates (found by Mads Kiilerich) 4046 * Replaced the expired test certificates 4047 * Do not bail out if no client certificate specified. Try 4048 to negotiate anonymous connection (Fixes ticket #12, 4049 found by Boris Krasnovskiy) 4050 4051Security fixes 4052 * Fixed a possible Man-in-the-Middle attack on the 4053 Diffie Hellman key exchange (thanks to Larry Highsmith, 4054 Subreption LLC) 4055 4056= Version 0.99-pre1 released on 2011-01-30 4057Features 4058Note: Most of these features have been donated by Fox-IT 4059 * Added Doxygen source code documentation parts 4060 * Added reading of DHM context from memory and file 4061 * Improved X509 certificate parsing to include extended 4062 certificate fields, including Key Usage 4063 * Improved certificate verification and verification 4064 against the available CRLs 4065 * Detection for DES weak keys and parity bits added 4066 * Improvements to support integration in other 4067 applications: 4068 + Added generic message digest and cipher wrapper 4069 + Improved information about current capabilities, 4070 status, objects and configuration 4071 + Added verification callback on certificate chain 4072 verification to allow external blacklisting 4073 + Additional example programs to show usage 4074 * Added support for PKCS#11 through the use of the 4075 libpkcs11-helper library 4076 4077Changes 4078 * x509parse_time_expired() checks time in addition to 4079 the existing date check 4080 * The ciphers member of ssl_context and the cipher member 4081 of ssl_session have been renamed to ciphersuites and 4082 ciphersuite respectively. This clarifies the difference 4083 with the generic cipher layer and is better naming 4084 altogether 4085 4086= Version 0.14.0 released on 2010-08-16 4087Features 4088 * Added support for SSL_EDH_RSA_AES_128_SHA and 4089 SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites 4090 * Added compile-time and run-time version information 4091 * Expanded ssl_client2 arguments for more flexibility 4092 * Added support for TLS v1.1 4093 4094Changes 4095 * Made Makefile cleaner 4096 * Removed dependency on rand() in rsa_pkcs1_encrypt(). 4097 Now using random fuction provided to function and 4098 changed the prototype of rsa_pkcs1_encrypt(), 4099 rsa_init() and rsa_gen_key(). 4100 * Some SSL defines were renamed in order to avoid 4101 future confusion 4102 4103Bug fixes 4104 * Fixed CMake out of source build for tests (found by 4105 kkert) 4106 * rsa_check_private() now supports PKCS1v2 keys as well 4107 * Fixed deadlock in rsa_pkcs1_encrypt() on failing random 4108 generator 4109 4110= Version 0.13.1 released on 2010-03-24 4111Bug fixes 4112 * Fixed Makefile in library that was mistakenly merged 4113 * Added missing const string fixes 4114 4115= Version 0.13.0 released on 2010-03-21 4116Features 4117 * Added option parsing for host and port selection to 4118 ssl_client2 4119 * Added support for GeneralizedTime in X509 parsing 4120 * Added cert_app program to allow easy reading and 4121 printing of X509 certificates from file or SSL 4122 connection. 4123 4124Changes 4125 * Added const correctness for main code base 4126 * X509 signature algorithm determination is now 4127 in a function to allow easy future expansion 4128 * Changed symmetric cipher functions to 4129 identical interface (returning int result values) 4130 * Changed ARC4 to use separate input/output buffer 4131 * Added reset function for HMAC context as speed-up 4132 for specific use-cases 4133 4134Bug fixes 4135 * Fixed bug resulting in failure to send the last 4136 certificate in the chain in ssl_write_certificate() and 4137 ssl_write_certificate_request() (found by fatbob) 4138 * Added small fixes for compiler warnings on a Mac 4139 (found by Frank de Brabander) 4140 * Fixed algorithmic bug in mpi_is_prime() (found by 4141 Smbat Tonoyan) 4142 4143= Version 0.12.1 released on 2009-10-04 4144Changes 4145 * Coverage test definitions now support 'depends_on' 4146 tagging system. 4147 * Tests requiring specific hashing algorithms now honor 4148 the defines. 4149 4150Bug fixes 4151 * Changed typo in #ifdef in x509parse.c (found 4152 by Eduardo) 4153 4154= Version 0.12.0 released on 2009-07-28 4155Features 4156 * Added CMake makefiles as alternative to regular Makefiles. 4157 * Added preliminary Code Coverage tests for AES, ARC4, 4158 Base64, MPI, SHA-family, MD-family, HMAC-SHA-family, 4159 Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman 4160 and X509parse. 4161 4162Changes 4163 * Error codes are not (necessarily) negative. Keep 4164 this is mind when checking for errors. 4165 * RSA_RAW renamed to SIG_RSA_RAW for consistency. 4166 * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE. 4167 * Changed interface for AES and Camellia setkey functions 4168 to indicate invalid key lengths. 4169 4170Bug fixes 4171 * Fixed include location of endian.h on FreeBSD (found by 4172 Gabriel) 4173 * Fixed include location of endian.h and name clash on 4174 Apples (found by Martin van Hensbergen) 4175 * Fixed HMAC-MD2 by modifying md2_starts(), so that the 4176 required HMAC ipad and opad variables are not cleared. 4177 (found by code coverage tests) 4178 * Prevented use of long long in bignum if 4179 POLARSSL_HAVE_LONGLONG not defined (found by Giles 4180 Bathgate). 4181 * Fixed incorrect handling of negative strings in 4182 mpi_read_string() (found by code coverage tests). 4183 * Fixed segfault on handling empty rsa_context in 4184 rsa_check_pubkey() and rsa_check_privkey() (found by 4185 code coverage tests). 4186 * Fixed incorrect handling of one single negative input 4187 value in mpi_add_abs() (found by code coverage tests). 4188 * Fixed incorrect handling of negative first input 4189 value in mpi_sub_abs() (found by code coverage tests). 4190 * Fixed incorrect handling of negative first input 4191 value in mpi_mod_mpi() and mpi_mod_int(). Resulting 4192 change also affects mpi_write_string() (found by code 4193 coverage tests). 4194 * Corrected is_prime() results for 0, 1 and 2 (found by 4195 code coverage tests). 4196 * Fixed Camellia and XTEA for 64-bit Windows systems. 4197 4198= Version 0.11.1 released on 2009-05-17 4199 * Fixed missing functionality for SHA-224, SHA-256, SHA384, 4200 SHA-512 in rsa_pkcs1_sign() 4201 4202= Version 0.11.0 released on 2009-05-03 4203 * Fixed a bug in mpi_gcd() so that it also works when both 4204 input numbers are even and added testcases to check 4205 (found by Pierre Habouzit). 4206 * Added support for SHA-224, SHA-256, SHA-384 and SHA-512 4207 one way hash functions with the PKCS#1 v1.5 signing and 4208 verification. 4209 * Fixed minor bug regarding mpi_gcd located within the 4210 POLARSSL_GENPRIME block. 4211 * Fixed minor memory leak in x509parse_crt() and added better 4212 handling of 'full' certificate chains (found by Mathias 4213 Olsson). 4214 * Centralized file opening and reading for x509 files into 4215 load_file() 4216 * Made definition of net_htons() endian-clean for big endian 4217 systems (Found by Gernot). 4218 * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in 4219 padlock and timing code. 4220 * Fixed an off-by-one buffer allocation in ssl_set_hostname() 4221 responsible for crashes and unwanted behaviour. 4222 * Added support for Certificate Revocation List (CRL) parsing. 4223 * Added support for CRL revocation to x509parse_verify() and 4224 SSL/TLS code. 4225 * Fixed compatibility of XTEA and Camellia on a 64-bit system 4226 (found by Felix von Leitner). 4227 4228= Version 0.10.0 released on 2009-01-12 4229 * Migrated XySSL to PolarSSL 4230 * Added XTEA symmetric cipher 4231 * Added Camellia symmetric cipher 4232 * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA, 4233 SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA 4234 * Fixed dangerous bug that can cause a heap overflow in 4235 rsa_pkcs1_decrypt (found by Christophe Devine) 4236 4237================================================================ 4238XySSL ChangeLog 4239 4240= Version 0.9 released on 2008-03-16 4241 4242 * Added support for ciphersuite: SSL_RSA_AES_128_SHA 4243 * Enabled support for large files by default in aescrypt2.c 4244 * Preliminary openssl wrapper contributed by David Barrett 4245 * Fixed a bug in ssl_write() that caused the same payload to 4246 be sent twice in non-blocking mode when send returns EAGAIN 4247 * Fixed ssl_parse_client_hello(): session id and challenge must 4248 not be swapped in the SSLv2 ClientHello (found by Greg Robson) 4249 * Added user-defined callback debug function (Krystian Kolodziej) 4250 * Before freeing a certificate, properly zero out all cert. data 4251 * Fixed the "mode" parameter so that encryption/decryption are 4252 not swapped on PadLock; also fixed compilation on older versions 4253 of gcc (bug reported by David Barrett) 4254 * Correctly handle the case in padlock_xcryptcbc() when input or 4255 output data is non-aligned by falling back to the software 4256 implementation, as VIA Nehemiah cannot handle non-aligned buffers 4257 * Fixed a memory leak in x509parse_crt() which was reported by Greg 4258 Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to 4259 Matthew Page who reported several bugs 4260 * Fixed x509_get_ext() to accept some rare certificates which have 4261 an INTEGER instead of a BOOLEAN for BasicConstraints::cA. 4262 * Added support on the client side for the TLS "hostname" extension 4263 (patch contributed by David Patino) 4264 * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty 4265 string is passed as the CN (bug reported by spoofy) 4266 * Added an option to enable/disable the BN assembly code 4267 * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1) 4268 * Disabled obsolete hash functions by default (MD2, MD4); updated 4269 selftest and benchmark to not test ciphers that have been disabled 4270 * Updated x509parse_cert_info() to correctly display byte 0 of the 4271 serial number, setup correct server port in the ssl client example 4272 * Fixed a critical denial-of-service with X.509 cert. verification: 4273 peer may cause xyssl to loop indefinitely by sending a certificate 4274 for which the RSA signature check fails (bug reported by Benoit) 4275 * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC, 4276 HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 4277 * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin) 4278 * Modified ssl_parse_client_key_exchange() to protect against 4279 Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well 4280 as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack 4281 * Updated rsa_gen_key() so that ctx->N is always nbits in size 4282 * Fixed assembly PPC compilation errors on Mac OS X, thanks to 4283 David Barrett and Dusan Semen 4284 4285= Version 0.8 released on 2007-10-20 4286 4287 * Modified the HMAC functions to handle keys larger 4288 than 64 bytes, thanks to Stephane Desneux and gary ng 4289 * Fixed ssl_read_record() to properly update the handshake 4290 message digests, which fixes IE6/IE7 client authentication 4291 * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten 4292 * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan 4293 * Added user-defined callbacks for handling I/O and sessions 4294 * Added lots of debugging output in the SSL/TLS functions 4295 * Added preliminary X.509 cert. writing by Pascal Vizeli 4296 * Added preliminary support for the VIA PadLock routines 4297 * Added AES-CFB mode of operation, contributed by chmike 4298 * Added an SSL/TLS stress testing program (ssl_test.c) 4299 * Updated the RSA PKCS#1 code to allow choosing between 4300 RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett 4301 * Updated ssl_read() to skip 0-length records from OpenSSL 4302 * Fixed the make install target to comply with *BSD make 4303 * Fixed a bug in mpi_read_binary() on 64-bit platforms 4304 * mpi_is_prime() speedups, thanks to Kevin McLaughlin 4305 * Fixed a long standing memory leak in mpi_is_prime() 4306 * Replaced realloc with malloc in mpi_grow(), and set 4307 the sign of zero as positive in mpi_init() (reported 4308 by Jonathan M. McCune) 4309 4310= Version 0.7 released on 2007-07-07 4311 4312 * Added support for the MicroBlaze soft-core processor 4313 * Fixed a bug in ssl_tls.c which sometimes prevented SSL 4314 connections from being established with non-blocking I/O 4315 * Fixed a couple bugs in the VS6 and UNIX Makefiles 4316 * Fixed the "PIC register ebx clobbered in asm" bug 4317 * Added HMAC starts/update/finish support functions 4318 * Added the SHA-224, SHA-384 and SHA-512 hash functions 4319 * Fixed the net_set_*block routines, thanks to Andreas 4320 * Added a few demonstration programs: md5sum, sha1sum, 4321 dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify 4322 * Added new bignum import and export helper functions 4323 * Rewrote README.txt in program/ssl/ca to better explain 4324 how to create a test PKI 4325 4326= Version 0.6 released on 2007-04-01 4327 4328 * Ciphers used in SSL/TLS can now be disabled at compile 4329 time, to reduce the memory footprint on embedded systems 4330 * Added multiply assembly code for the TriCore and modified 4331 havege_struct for this processor, thanks to David Patiño 4332 * Added multiply assembly code for 64-bit PowerPCs, 4333 thanks to Peking University and the OSU Open Source Lab 4334 * Added experimental support of Quantum Cryptography 4335 * Added support for autoconf, contributed by Arnaud Cornet 4336 * Fixed "long long" compilation issues on IA-64 and PPC64 4337 * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock 4338 was not being correctly defined on ARM and MIPS 4339 4340= Version 0.5 released on 2007-03-01 4341 4342 * Added multiply assembly code for SPARC and Alpha 4343 * Added (beta) support for non-blocking I/O operations 4344 * Implemented session resuming and client authentication 4345 * Fixed some portability issues on WinCE, MINIX 3, Plan9 4346 (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris 4347 * Improved the performance of the EDH key exchange 4348 * Fixed a bug that caused valid packets with a payload 4349 size of 16384 bytes to be rejected 4350 4351= Version 0.4 released on 2007-02-01 4352 4353 * Added support for Ephemeral Diffie-Hellman key exchange 4354 * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K 4355 * Various improvement to the modular exponentiation code 4356 * Rewrote the headers to generate the API docs with doxygen 4357 * Fixed a bug in ssl_encrypt_buf (incorrect padding was 4358 generated) and in ssl_parse_client_hello (max. client 4359 version was not properly set), thanks to Didier Rebeix 4360 * Fixed another bug in ssl_parse_client_hello: clients with 4361 cipherlists larger than 96 bytes were incorrectly rejected 4362 * Fixed a couple memory leak in x509_read.c 4363 4364= Version 0.3 released on 2007-01-01 4365 4366 * Added server-side SSLv3 and TLSv1.0 support 4367 * Multiple fixes to enhance the compatibility with g++, 4368 thanks to Xosé Antón Otero Ferreira 4369 * Fixed a bug in the CBC code, thanks to dowst; also, 4370 the bignum code is no longer dependent on long long 4371 * Updated rsa_pkcs1_sign to handle arbitrary large inputs 4372 * Updated timing.c for improved compatibility with i386 4373 and 486 processors, thanks to Arnaud Cornet 4374 4375= Version 0.2 released on 2006-12-01 4376 4377 * Updated timing.c to support ARM and MIPS arch 4378 * Updated the MPI code to support 8086 on MSVC 1.5 4379 * Added the copyright notice at the top of havege.h 4380 * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang 4381 * Fixed a bug reported by Adrian Rüegsegger in x509_read_key 4382 * Fixed a bug reported by Torsten Lauter in ssl_read_record 4383 * Fixed a bug in rsa_check_privkey that would wrongly cause 4384 valid RSA keys to be dismissed (thanks to oldwolf) 4385 * Fixed a bug in mpi_is_prime that caused some primes to fail 4386 the Miller-Rabin primality test 4387 4388 I'd also like to thank Younès Hafri for the CRUX linux port, 4389 Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet 4390 who maintains the Debian package :-) 4391 4392= Version 0.1 released on 2006-11-01 4393