1 /* 2 * fs/cifs/ntlmssp.h 3 * 4 * Copyright (c) International Business Machines Corp., 2002,2007 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * 7 * This library is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU Lesser General Public License as published 9 * by the Free Software Foundation; either version 2.1 of the License, or 10 * (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 15 * the GNU Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public License 18 * along with this library; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #define NTLMSSP_SIGNATURE "NTLMSSP" 23 /* Message Types */ 24 #define NtLmNegotiate cpu_to_le32(1) 25 #define NtLmChallenge cpu_to_le32(2) 26 #define NtLmAuthenticate cpu_to_le32(3) 27 #define UnknownMessage cpu_to_le32(8) 28 29 /* Negotiate Flags */ 30 #define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */ 31 #define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */ 32 #define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */ 33 /* define reserved9 0x08 */ 34 #define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */ 35 #define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */ 36 #define NTLMSSP_NEGOTIATE_DGRAM 0x0040 37 #define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */ 38 /* defined reserved 8 0x0100 */ 39 #define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */ 40 #define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */ 41 #define NTLMSSP_ANONYMOUS 0x0800 42 #define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */ 43 #define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000 44 #define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */ 45 #define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */ 46 #define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000 47 #define NTLMSSP_TARGET_TYPE_SERVER 0x20000 48 #define NTLMSSP_TARGET_TYPE_SHARE 0x40000 49 #define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/ 50 /* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */ 51 #define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000 52 #define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */ 53 #define NTLMSSP_REQUEST_NON_NT_KEY 0x400000 54 #define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000 55 /* #define reserved4 0x1000000 */ 56 #define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we do not set */ 57 /* #define reserved3 0x4000000 */ 58 /* #define reserved2 0x8000000 */ 59 /* #define reserved1 0x10000000 */ 60 #define NTLMSSP_NEGOTIATE_128 0x20000000 61 #define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000 62 #define NTLMSSP_NEGOTIATE_56 0x80000000 63 64 /* Define AV Pair Field IDs */ 65 enum av_field_type { 66 NTLMSSP_AV_EOL = 0, 67 NTLMSSP_AV_NB_COMPUTER_NAME, 68 NTLMSSP_AV_NB_DOMAIN_NAME, 69 NTLMSSP_AV_DNS_COMPUTER_NAME, 70 NTLMSSP_AV_DNS_DOMAIN_NAME, 71 NTLMSSP_AV_DNS_TREE_NAME, 72 NTLMSSP_AV_FLAGS, 73 NTLMSSP_AV_TIMESTAMP, 74 NTLMSSP_AV_RESTRICTION, 75 NTLMSSP_AV_TARGET_NAME, 76 NTLMSSP_AV_CHANNEL_BINDINGS 77 }; 78 79 /* Although typedefs are not commonly used for structure definitions */ 80 /* in the Linux kernel, in this particular case they are useful */ 81 /* to more closely match the standards document for NTLMSSP from */ 82 /* OpenGroup and to make the code more closely match the standard in */ 83 /* appearance */ 84 85 typedef struct _SECURITY_BUFFER { 86 __le16 Length; 87 __le16 MaximumLength; 88 __le32 BufferOffset; /* offset to buffer */ 89 } __attribute__((packed)) SECURITY_BUFFER; 90 91 typedef struct _NEGOTIATE_MESSAGE { 92 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 93 __le32 MessageType; /* NtLmNegotiate = 1 */ 94 __le32 NegotiateFlags; 95 SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */ 96 SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */ 97 /* SECURITY_BUFFER for version info not present since we 98 do not set the version is present flag */ 99 char DomainString[0]; 100 /* followed by WorkstationString */ 101 } __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE; 102 103 typedef struct _CHALLENGE_MESSAGE { 104 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 105 __le32 MessageType; /* NtLmChallenge = 2 */ 106 SECURITY_BUFFER TargetName; 107 __le32 NegotiateFlags; 108 __u8 Challenge[CIFS_CRYPTO_KEY_SIZE]; 109 __u8 Reserved[8]; 110 SECURITY_BUFFER TargetInfoArray; 111 /* SECURITY_BUFFER for version info not present since we 112 do not set the version is present flag */ 113 } __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE; 114 115 typedef struct _AUTHENTICATE_MESSAGE { 116 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 117 __le32 MessageType; /* NtLmsAuthenticate = 3 */ 118 SECURITY_BUFFER LmChallengeResponse; 119 SECURITY_BUFFER NtChallengeResponse; 120 SECURITY_BUFFER DomainName; 121 SECURITY_BUFFER UserName; 122 SECURITY_BUFFER WorkstationName; 123 SECURITY_BUFFER SessionKey; 124 __le32 NegotiateFlags; 125 /* SECURITY_BUFFER for version info not present since we 126 do not set the version is present flag */ 127 char UserString[0]; 128 } __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE; 129 130 /* 131 * Size of the session key (crypto key encrypted with the password 132 */ 133 134 int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses); 135 void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, struct cifs_ses *ses); 136 int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen, 137 struct cifs_ses *ses, 138 const struct nls_table *nls_cp); 139