fs/cifs/ntlmssp.h

   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);