fs/cifs/ntlmssp.h

   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 only set for SMB2+ */
  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 #define NTLMSSP_REVISION_W2K3 0x0F
  91
  92 /* See MS-NLMP section 2.2.2.10 */
  93 struct ntlmssp_version {
  94         __u8    ProductMajorVersion;
  95         __u8    ProductMinorVersion;
  96         __le16  ProductBuild; /* we send the cifs.ko module version here */
  97         __u8    Reserved[3];
  98         __u8    NTLMRevisionCurrent; /* currently 0x0F */
  99 } __packed;
 100
 101 /* see MS-NLMP section 2.2.1.1 */
 102 struct negotiate_message {
 103         __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
 104         __le32 MessageType;     /* NtLmNegotiate = 1 */
 105         __le32 NegotiateFlags;
 106         SECURITY_BUFFER DomainName;     /* RFC 1001 style and ASCII */
 107         SECURITY_BUFFER WorkstationName;        /* RFC 1001 and ASCII */
 108         struct  ntlmssp_version Version;
 109         /* SECURITY_BUFFER */
 110         char DomainString[];
 111         /* followed by WorkstationString */
 112 } __packed;
 113
 114 typedef struct _CHALLENGE_MESSAGE {
 115         __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
 116         __le32 MessageType;   /* NtLmChallenge = 2 */
 117         SECURITY_BUFFER TargetName;
 118         __le32 NegotiateFlags;
 119         __u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
 120         __u8 Reserved[8];
 121         SECURITY_BUFFER TargetInfoArray;
 122         /* SECURITY_BUFFER for version info not present since we
 123            do not set the version is present flag */
 124 } __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
 125
 126 typedef struct _AUTHENTICATE_MESSAGE {
 127         __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
 128         __le32 MessageType;  /* NtLmsAuthenticate = 3 */
 129         SECURITY_BUFFER LmChallengeResponse;
 130         SECURITY_BUFFER NtChallengeResponse;
 131         SECURITY_BUFFER DomainName;
 132         SECURITY_BUFFER UserName;
 133         SECURITY_BUFFER WorkstationName;
 134         SECURITY_BUFFER SessionKey;
 135         __le32 NegotiateFlags;
 136         /* SECURITY_BUFFER for version info not present since we
 137            do not set the version is present flag */
 138         char UserString[0];
 139 } __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
 140
 141 /*
 142  * Size of the session key (crypto key encrypted with the password
 143  */
 144
 145 int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses);
 146 int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
 147                                  struct cifs_ses *ses,
 148                                  struct TCP_Server_Info *server,
 149                                  const struct nls_table *nls_cp);
 150 int build_ntlmssp_smb3_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
 151                                  struct cifs_ses *ses,
 152                                  struct TCP_Server_Info *server,
 153                                  const struct nls_table *nls_cp);
 154 int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,
 155                         struct cifs_ses *ses,
 156                         struct TCP_Server_Info *server,
 157                         const struct nls_table *nls_cp);