linux/fs/cifs/ntlmssp.h
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   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
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