1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (c) International Business Machines Corp., 2002,2007 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * 7 */ 8 9 #define NTLMSSP_SIGNATURE "NTLMSSP" 10 /* Message Types */ 11 #define NtLmNegotiate cpu_to_le32(1) 12 #define NtLmChallenge cpu_to_le32(2) 13 #define NtLmAuthenticate cpu_to_le32(3) 14 #define UnknownMessage cpu_to_le32(8) 15 16 /* Negotiate Flags */ 17 #define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */ 18 #define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */ 19 #define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */ 20 /* define reserved9 0x08 */ 21 #define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */ 22 #define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */ 23 #define NTLMSSP_NEGOTIATE_DGRAM 0x0040 24 #define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */ 25 /* defined reserved 8 0x0100 */ 26 #define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */ 27 #define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */ 28 #define NTLMSSP_ANONYMOUS 0x0800 29 #define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */ 30 #define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000 31 #define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */ 32 #define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */ 33 #define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000 34 #define NTLMSSP_TARGET_TYPE_SERVER 0x20000 35 #define NTLMSSP_TARGET_TYPE_SHARE 0x40000 36 #define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/ 37 /* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */ 38 #define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000 39 #define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */ 40 #define NTLMSSP_REQUEST_NON_NT_KEY 0x400000 41 #define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000 42 /* #define reserved4 0x1000000 */ 43 #define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we do not set */ 44 /* #define reserved3 0x4000000 */ 45 /* #define reserved2 0x8000000 */ 46 /* #define reserved1 0x10000000 */ 47 #define NTLMSSP_NEGOTIATE_128 0x20000000 48 #define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000 49 #define NTLMSSP_NEGOTIATE_56 0x80000000 50 51 /* Define AV Pair Field IDs */ 52 enum av_field_type { 53 NTLMSSP_AV_EOL = 0, 54 NTLMSSP_AV_NB_COMPUTER_NAME, 55 NTLMSSP_AV_NB_DOMAIN_NAME, 56 NTLMSSP_AV_DNS_COMPUTER_NAME, 57 NTLMSSP_AV_DNS_DOMAIN_NAME, 58 NTLMSSP_AV_DNS_TREE_NAME, 59 NTLMSSP_AV_FLAGS, 60 NTLMSSP_AV_TIMESTAMP, 61 NTLMSSP_AV_RESTRICTION, 62 NTLMSSP_AV_TARGET_NAME, 63 NTLMSSP_AV_CHANNEL_BINDINGS 64 }; 65 66 /* Although typedefs are not commonly used for structure definitions */ 67 /* in the Linux kernel, in this particular case they are useful */ 68 /* to more closely match the standards document for NTLMSSP from */ 69 /* OpenGroup and to make the code more closely match the standard in */ 70 /* appearance */ 71 72 typedef struct _SECURITY_BUFFER { 73 __le16 Length; 74 __le16 MaximumLength; 75 __le32 BufferOffset; /* offset to buffer */ 76 } __attribute__((packed)) SECURITY_BUFFER; 77 78 typedef struct _NEGOTIATE_MESSAGE { 79 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 80 __le32 MessageType; /* NtLmNegotiate = 1 */ 81 __le32 NegotiateFlags; 82 SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */ 83 SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */ 84 /* SECURITY_BUFFER for version info not present since we 85 do not set the version is present flag */ 86 char DomainString[0]; 87 /* followed by WorkstationString */ 88 } __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE; 89 90 typedef struct _CHALLENGE_MESSAGE { 91 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 92 __le32 MessageType; /* NtLmChallenge = 2 */ 93 SECURITY_BUFFER TargetName; 94 __le32 NegotiateFlags; 95 __u8 Challenge[CIFS_CRYPTO_KEY_SIZE]; 96 __u8 Reserved[8]; 97 SECURITY_BUFFER TargetInfoArray; 98 /* SECURITY_BUFFER for version info not present since we 99 do not set the version is present flag */ 100 } __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE; 101 102 typedef struct _AUTHENTICATE_MESSAGE { 103 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 104 __le32 MessageType; /* NtLmsAuthenticate = 3 */ 105 SECURITY_BUFFER LmChallengeResponse; 106 SECURITY_BUFFER NtChallengeResponse; 107 SECURITY_BUFFER DomainName; 108 SECURITY_BUFFER UserName; 109 SECURITY_BUFFER WorkstationName; 110 SECURITY_BUFFER SessionKey; 111 __le32 NegotiateFlags; 112 /* SECURITY_BUFFER for version info not present since we 113 do not set the version is present flag */ 114 char UserString[0]; 115 } __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE; 116 117 /* 118 * Size of the session key (crypto key encrypted with the password 119 */ 120 121 int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses); 122 int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, u16 *buflen, 123 struct cifs_ses *ses, 124 const struct nls_table *nls_cp); 125 int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen, 126 struct cifs_ses *ses, 127 const struct nls_table *nls_cp); 128