1 // SPDX-License-Identifier: BSD-2-Clause
2 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
3 *
4 * LibTomCrypt is a library that provides various cryptographic
5 * algorithms in a highly modular and flexible manner.
6 *
7 * The library is free for all purposes without any express
8 * guarantee it works.
9 */
10 #include "tomcrypt_private.h"
11
12 /**
13 @file x25519_import_x509.c
14 Import a X25519 key from a X.509 certificate, Steffen Jaeckel
15 */
16
17 #ifdef LTC_CURVE25519
18
_x25519_decode(const unsigned char * in,unsigned long inlen,curve25519_key * key)19 static int _x25519_decode(const unsigned char *in, unsigned long inlen, curve25519_key *key)
20 {
21 if (inlen != sizeof(key->pub)) return CRYPT_PK_INVALID_SIZE;
22 XMEMCPY(key->pub, in, sizeof(key->pub));
23 return CRYPT_OK;
24 }
25
26 /**
27 Import a X25519 public key from a X.509 certificate
28 @param in The DER encoded X.509 certificate
29 @param inlen The length of the certificate
30 @param key [out] Where to import the key to
31 @return CRYPT_OK if successful, on error all allocated memory is freed automatically
32 */
x25519_import_x509(const unsigned char * in,unsigned long inlen,curve25519_key * key)33 int x25519_import_x509(const unsigned char *in, unsigned long inlen, curve25519_key *key)
34 {
35 int err;
36
37 LTC_ARGCHK(in != NULL);
38 LTC_ARGCHK(key != NULL);
39
40 if ((err = x509_decode_public_key_from_certificate(in, inlen,
41 PKA_X25519,
42 LTC_ASN1_EOL, NULL, NULL,
43 (public_key_decode_cb)_x25519_decode, key)) != CRYPT_OK) {
44 return err;
45 }
46 key->type = PK_PUBLIC;
47 key->algo = PKA_X25519;
48
49 return err;
50 }
51
52 #endif
53
54 /* ref: $Format:%D$ */
55 /* git commit: $Format:%H$ */
56 /* commit time: $Format:%ai$ */
57