source/include/rpc_dce.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB parameters and setup
   4    Copyright (C) Andrew Tridgell 1992-1997
   5    Copyright (C) Luke Kenneth Casson Leighton 1996-1997
   6    Copyright (C) Paul Ashton 1997
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #ifndef _DCE_RPC_H /* _DCE_RPC_H */
  24 #define _DCE_RPC_H
  25
  26 #include "rpc_misc.h"  /* this only pulls in STRHDR */
  27
  28
  29 /* DCE/RPC packet types */
  30
  31 enum RPC_PKT_TYPE {
  32         RPC_REQUEST = 0x00,
  33         RPC_RESPONSE = 0x02,
  34         RPC_FAULT    = 0x03,
  35         RPC_BIND     = 0x0B,
  36         RPC_BINDACK  = 0x0C,
  37         RPC_BINDNACK = 0x0D,
  38         RPC_ALTCONT  = 0x0E,
  39         RPC_ALTCONTRESP = 0x0F,
  40         RPC_BINDRESP = 0x10 /* not the real name!  this is undocumented! */
  41 };
  42
  43 /* DCE/RPC flags */
  44 #define RPC_FLG_FIRST 0x01
  45 #define RPC_FLG_LAST  0x02
  46 #define RPC_FLG_NOCALL 0x20
  47
  48 #define SMBD_NTLMSSP_NEG_FLAGS 0x000082b1 /* ALWAYS_SIGN|NEG_NTLM|NEG_LM|NEG_SEAL|NEG_SIGN|NEG_UNICODE */
  49
  50 /* NTLMSSP signature version */
  51 #define NTLMSSP_SIGN_VERSION 0x01
  52
  53 /* NTLMSSP auth type */
  54 #define NTLMSSP_AUTH_TYPE 0xa
  55
  56 /* DCE-RPC standard identifiers to indicate
  57    signing or sealing of an RPC pipe */
  58 #define RPC_PIPE_AUTH_SIGN_LEVEL 0x5
  59 #define RPC_PIPE_AUTH_SEAL_LEVEL 0x6
  60
  61 /* Netlogon schannel auth type and level */
  62 #define NETSEC_AUTH_TYPE 0x44
  63 #define NETSEC_SIGN_SIGNATURE { 0x77, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00 }
  64 #define NETSEC_SEAL_SIGNATURE { 0x77, 0x00, 0x7a, 0x00, 0xff, 0xff, 0x00, 0x00 }
  65
  66 #define RPC_AUTH_NETSEC_SIGN_OR_SEAL_CHK_LEN    0x20
  67 #define RPC_AUTH_NETSEC_SIGN_ONLY_CHK_LEN       0x18
  68
  69 /* SPNEGO auth type. */
  70 #define SPNEGO_AUTH_TYPE 0x9
  71
  72 /* The 7 here seems to be required to get Win2k not to downgrade us
  73    to NT4.  Actually, anything other than 1ff would seem to do... */
  74 #define NETLOGON_NEG_AUTH2_FLAGS 0x000701ff
  75
  76 #define NETLOGON_NEG_SCHANNEL                   0x40000000
  77 #define NETLOGON_NEG_DOMAIN_TRUST_ACCOUNT       0x2010b000
  78
  79 enum netsec_direction {
  80         SENDER_IS_INITIATOR,
  81         SENDER_IS_ACCEPTOR
  82 };
  83
  84 /* Internal Flags to indicate what type of authentication on the pipe */
  85 #define AUTH_PIPE_SIGN    0x0001
  86 #define AUTH_PIPE_SEAL    0x0002
  87 #define AUTH_PIPE_NTLMSSP 0x0004
  88 #define AUTH_PIPE_NETSEC  0x0008
  89
  90 /* Maximum PDU fragment size. */
  91 /* #define MAX_PDU_FRAG_LEN 0x1630              this is what wnt sets */
  92 #define MAX_PDU_FRAG_LEN 0x10b8                 /* this is what w2k sets */
  93
  94 /* RPC_IFACE */
  95 typedef struct rpc_iface_info {
  96         struct uuid uuid;  /* 16 bytes of rpc interface identification */
  97         uint32 version;    /* the interface version number */
  98 } RPC_IFACE;
  99
 100 #define RPC_IFACE_LEN (UUID_SIZE + 4)
 101
 102 struct pipe_id_info {
 103         /* the names appear not to matter: the syntaxes _do_ matter */
 104
 105         const char *client_pipe;
 106         RPC_IFACE abstr_syntax; /* this one is the abstract syntax id */
 107
 108         const char *server_pipe;  /* this one is the secondary syntax name */
 109         RPC_IFACE trans_syntax; /* this one is the primary syntax id */
 110 };
 111
 112 /* RPC_HDR - dce rpc header */
 113 typedef struct rpc_hdr_info {
 114         uint8  major; /* 5 - RPC major version */
 115         uint8  minor; /* 0 - RPC minor version */
 116         uint8  pkt_type; /* RPC_PKT_TYPE - RPC response packet */
 117         uint8  flags; /* DCE/RPC flags */
 118         uint8  pack_type[4]; /* 0x1000 0000 - little-endian packed data representation */
 119         uint16 frag_len; /* fragment length - data size (bytes) inc header and tail. */
 120         uint16 auth_len; /* 0 - authentication length  */
 121         uint32 call_id; /* call identifier.  matches 12th uint32 of incoming RPC data. */
 122 } RPC_HDR;
 123
 124 #define RPC_HEADER_LEN 16
 125
 126 /* RPC_HDR_REQ - ms request rpc header */
 127 typedef struct rpc_hdr_req_info {
 128         uint32 alloc_hint;   /* allocation hint - data size (bytes) minus header and tail. */
 129         uint16 context_id;   /* presentation context identifier */
 130         uint16  opnum;       /* opnum */
 131 } RPC_HDR_REQ;
 132
 133 #define RPC_HDR_REQ_LEN 8
 134
 135 /* RPC_HDR_RESP - ms response rpc header */
 136 typedef struct rpc_hdr_resp_info {
 137         uint32 alloc_hint;   /* allocation hint - data size (bytes) minus header and tail. */
 138         uint16 context_id;   /* 0 - presentation context identifier */
 139         uint8  cancel_count; /* 0 - cancel count */
 140         uint8  reserved;     /* 0 - reserved. */
 141 } RPC_HDR_RESP;
 142
 143 #define RPC_HDR_RESP_LEN 8
 144
 145 /* RPC_HDR_FAULT - fault rpc header */
 146 typedef struct rpc_hdr_fault_info {
 147         NTSTATUS status;
 148         uint32 reserved; /* 0x0000 0000 */
 149 } RPC_HDR_FAULT;
 150
 151 #define RPC_HDR_FAULT_LEN 8
 152
 153 /* this seems to be the same string name depending on the name of the pipe,
 154  * but is more likely to be linked to the interface name
 155  * "srvsvc", "\\PIPE\\ntsvcs"
 156  * "samr", "\\PIPE\\lsass"
 157  * "wkssvc", "\\PIPE\\wksvcs"
 158  * "NETLOGON", "\\PIPE\\NETLOGON"
 159  */
 160 /* RPC_ADDR_STR */
 161 typedef struct rpc_addr_info {
 162         uint16 len;   /* length of the string including null terminator */
 163         fstring str; /* the string above in single byte, null terminated form */
 164 } RPC_ADDR_STR;
 165
 166 /* RPC_HDR_BBA */
 167 typedef struct rpc_hdr_bba_info {
 168         uint16 max_tsize;       /* maximum transmission fragment size (0x1630) */
 169         uint16 max_rsize;       /* max receive fragment size (0x1630) */
 170         uint32 assoc_gid;       /* associated group id (0x0) */
 171 } RPC_HDR_BBA;
 172
 173 #define RPC_HDR_BBA_LEN 8
 174
 175 /* RPC_HDR_AUTH */
 176 typedef struct rpc_hdr_auth_info {
 177         uint8 auth_type; /* See XXX_AUTH_TYPE above. */
 178         uint8 auth_level; /* See RPC_PIPE_AUTH_XXX_LEVEL above. */
 179         uint8 auth_pad_len;
 180         uint8 auth_reserved;
 181         uint32 auth_context_id;
 182 } RPC_HDR_AUTH;
 183
 184 #define RPC_HDR_AUTH_LEN 8
 185
 186 /* RPC_HDR_AUTHA */
 187 typedef struct rpc_hdr_autha_info {
 188         uint16 max_tsize;       /* maximum transmission fragment size (0x1630) */
 189         uint16 max_rsize;       /* max receive fragment size (0x1630) */
 190         RPC_HDR_AUTH auth;
 191 } RPC_HDR_AUTHA;
 192
 193 #define RPC_HDR_AUTHA_LEN (RPC_HDR_AUTH_LEN+4)
 194
 195 /* this is TEMPORARILY coded up as a specific structure */
 196 /* this structure comes after the bind request */
 197 /* RPC_AUTH_NETSEC_NEG */
 198 typedef struct rpc_auth_netsec_neg_info {
 199         uint32 type1;   /* Always zero ? */
 200         uint32 type2;   /* Types 0x3 and 0x13 seen. Check AcquireSecurityContext() docs.... */
 201         fstring domain; /* calling workstations's domain */
 202         fstring myname; /* calling workstation's name */
 203 } RPC_AUTH_NETSEC_NEG;
 204
 205 /* attached to the end of encrypted rpc requests and responses */
 206 /* RPC_AUTH_NETSEC_CHK */
 207 typedef struct rpc_auth_netsec_chk_info {
 208         uint8 sig  [8]; /* 77 00 7a 00 ff ff 00 00 */
 209         uint8 packet_digest[8]; /* checksum over the packet, MD5'ed with session key */
 210         uint8 seq_num[8]; /* verifier, seq num */
 211         uint8 confounder[8]; /* random 8-byte nonce */
 212 } RPC_AUTH_NETSEC_CHK;
 213
 214 struct netsec_auth_struct {
 215         uchar sess_key[16];
 216         uint32 seq_num;
 217         int auth_flags;
 218 };
 219
 220 typedef struct rpc_context {
 221         uint16 context_id;              /* presentation context identifier. */
 222         uint8 num_transfer_syntaxes;    /* the number of syntaxes */
 223         RPC_IFACE abstract;             /* num and vers. of interface client is using */
 224         RPC_IFACE *transfer;            /* Array of transfer interfaces. */
 225 } RPC_CONTEXT;
 226
 227 /* RPC_BIND_REQ - ms req bind */
 228 typedef struct rpc_bind_req_info {
 229         RPC_HDR_BBA bba;
 230         uint8 num_contexts;    /* the number of contexts */
 231         RPC_CONTEXT *rpc_context;
 232 } RPC_HDR_RB;
 233
 234 /*
 235  * The following length is 8 bytes RPC_HDR_BBA_LEN +
 236  * 4 bytes size of context count +
 237  * (context_count * (4 bytes of context_id, size of transfer syntax count + RPC_IFACE_LEN bytes +
 238  *                    (transfer_syntax_count * RPC_IFACE_LEN bytes)))
 239  */
 240
 241 #define RPC_HDR_RB_LEN(rpc_hdr_rb) (RPC_HDR_BBA_LEN + 4 + \
 242         ((rpc_hdr_rb)->num_contexts) * (4 + RPC_IFACE_LEN + (((rpc_hdr_rb)->rpc_context->num_transfer_syntaxes)*RPC_IFACE_LEN)))
 243
 244 /* RPC_RESULTS - can only cope with one reason, right now... */
 245 typedef struct rpc_results_info {
 246         /* uint8[] # 4-byte alignment padding, against SMB header */
 247
 248         uint8 num_results; /* the number of results (0x01) */
 249
 250         /* uint8[] # 4-byte alignment padding, against SMB header */
 251
 252         uint16 result; /* result (0x00 = accept) */
 253         uint16 reason; /* reason (0x00 = no reason specified) */
 254 } RPC_RESULTS;
 255
 256 /* RPC_HDR_BA */
 257 typedef struct rpc_hdr_ba_info {
 258         RPC_HDR_BBA bba;
 259
 260         RPC_ADDR_STR addr    ;  /* the secondary address string, as described earlier */
 261         RPC_RESULTS  res     ; /* results and reasons */
 262         RPC_IFACE    transfer; /* the transfer syntax from the request */
 263 } RPC_HDR_BA;
 264
 265 /* RPC_AUTH_VERIFIER */
 266 typedef struct rpc_auth_verif_info {
 267         fstring signature; /* "NTLMSSP".. Ok, not quite anymore */
 268         uint32  msg_type; /* NTLMSSP_MESSAGE_TYPE (1,2,3) and 5 for schannel */
 269 } RPC_AUTH_VERIFIER;
 270
 271 /* this is TEMPORARILY coded up as a specific structure */
 272 /* this structure comes after the bind request */
 273 /* RPC_AUTH_NTLMSSP_NEG */
 274
 275 typedef struct rpc_auth_ntlmssp_neg_info {
 276         uint32  neg_flgs; /* 0x0000 b2b3 */
 277
 278         STRHDR hdr_myname; /* offset is against START of this structure */
 279         STRHDR hdr_domain; /* offset is against START of this structure */
 280
 281         fstring myname; /* calling workstation's name */
 282         fstring domain; /* calling workstations's domain */
 283 } RPC_AUTH_NTLMSSP_NEG;
 284
 285 /* this is TEMPORARILY coded up as a specific structure */
 286 /* this structure comes after the bind acknowledgement */
 287 /* RPC_AUTH_NTLMSSP_CHAL */
 288 typedef struct rpc_auth_ntlmssp_chal_info {
 289         uint32 unknown_1; /* 0x0000 0000 */
 290         uint32 unknown_2; /* 0x0000 0028 */
 291         uint32 neg_flags; /* 0x0000 82b1 */
 292
 293         uint8 challenge[8]; /* ntlm challenge */
 294         uint8 reserved [8]; /* zeros */
 295 } RPC_AUTH_NTLMSSP_CHAL;
 296
 297
 298 /* RPC_AUTH_NTLMSSP_RESP */
 299 typedef struct rpc_auth_ntlmssp_resp_info {
 300         STRHDR hdr_lm_resp; /* 24 byte response */
 301         STRHDR hdr_nt_resp; /* 24 byte response */
 302         STRHDR hdr_domain;
 303         STRHDR hdr_usr;
 304         STRHDR hdr_wks;
 305         STRHDR hdr_sess_key; /* NULL unless negotiated */
 306         uint32 neg_flags; /* 0x0000 82b1 */
 307
 308         fstring sess_key;
 309         fstring wks;
 310         fstring user;
 311         fstring domain;
 312         fstring nt_resp;
 313         fstring lm_resp;
 314 } RPC_AUTH_NTLMSSP_RESP;
 315
 316 /* attached to the end of encrypted rpc requests and responses */
 317 /* RPC_AUTH_NTLMSSP_CHK */
 318 typedef struct rpc_auth_ntlmssp_chk_info {
 319         uint32 ver; /* 0x0000 0001 */
 320         uint32 reserved;
 321         uint32 crc32; /* checksum using 0xEDB8 8320 as a polynomial */
 322         uint32 seq_num;
 323 } RPC_AUTH_NTLMSSP_CHK;
 324
 325 #define RPC_AUTH_NTLMSSP_CHK_LEN 16
 326
 327 #endif /* _DCE_RPC_H */