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 */ 65enum 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 85typedef struct _SECURITY_BUFFER { 86 __le16 Length; 87 __le16 MaximumLength; 88 __le32 BufferOffset; /* offset to buffer */ 89} __attribute__((packed)) SECURITY_BUFFER; 90 91typedef 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 103typedef 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 115typedef 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 134int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses); 135void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, struct cifs_ses *ses); 136int build_ntlmssp_auth_blob(unsigned char *pbuffer, u16 *buflen, 137 struct cifs_ses *ses, 138 const struct nls_table *nls_cp); 139