librpc/rpc/rpc_common.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher 2010-2011
   5    Copyright (C) Andrew Tridgell 2010-2011
   6    Copyright (C) Simo Sorce 2010
   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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef __DEFAULT_LIBRPC_RPCCOMMON_H__
  23 #define __DEFAULT_LIBRPC_RPCCOMMON_H__
  24
  25 struct dcerpc_binding_handle;
  26 struct GUID;
  27 struct ndr_interface_table;
  28 struct ndr_interface_call;
  29 struct ndr_push;
  30 struct ndr_pull;
  31 struct ncacn_packet;
  32 struct epm_floor;
  33 struct epm_tower;
  34 struct tevent_context;
  35 struct tstream_context;
  36
  37 enum dcerpc_transport_t {
  38         NCA_UNKNOWN, NCACN_NP, NCACN_IP_TCP, NCACN_IP_UDP, NCACN_VNS_IPC,
  39         NCACN_VNS_SPP, NCACN_AT_DSP, NCADG_AT_DDP, NCALRPC, NCACN_UNIX_STREAM,
  40         NCADG_UNIX_DGRAM, NCACN_HTTP, NCADG_IPX, NCACN_SPX, NCACN_INTERNAL };
  41
  42 /** this describes a binding to a particular transport/pipe */
  43 struct dcerpc_binding {
  44         enum dcerpc_transport_t transport;
  45         struct ndr_syntax_id object;
  46         const char *host;
  47         const char *target_hostname;
  48         const char *target_principal;
  49         const char *endpoint;
  50         const char **options;
  51         const char *localaddress;
  52         uint32_t flags;
  53         uint32_t assoc_group_id;
  54 };
  55
  56 /* dcerpc pipe flags */
  57 #define DCERPC_DEBUG_PRINT_IN          (1<<0)
  58 #define DCERPC_DEBUG_PRINT_OUT         (1<<1)
  59 #define DCERPC_DEBUG_PRINT_BOTH (DCERPC_DEBUG_PRINT_IN | DCERPC_DEBUG_PRINT_OUT)
  60
  61 #define DCERPC_DEBUG_VALIDATE_IN       (1<<2)
  62 #define DCERPC_DEBUG_VALIDATE_OUT      (1<<3)
  63 #define DCERPC_DEBUG_VALIDATE_BOTH (DCERPC_DEBUG_VALIDATE_IN | DCERPC_DEBUG_VALIDATE_OUT)
  64
  65 #define DCERPC_CONNECT                 (1<<4)
  66 #define DCERPC_SIGN                    (1<<5)
  67 #define DCERPC_SEAL                    (1<<6)
  68
  69 #define DCERPC_PUSH_BIGENDIAN          (1<<7)
  70 #define DCERPC_PULL_BIGENDIAN          (1<<8)
  71
  72 #define DCERPC_SCHANNEL                (1<<9)
  73
  74 #define DCERPC_ANON_FALLBACK           (1<<10)
  75
  76 /* use a 128 bit session key */
  77 #define DCERPC_SCHANNEL_128            (1<<12)
  78
  79 /* check incoming pad bytes */
  80 #define DCERPC_DEBUG_PAD_CHECK         (1<<13)
  81
  82 /* set LIBNDR_FLAG_REF_ALLOC flag when decoding NDR */
  83 #define DCERPC_NDR_REF_ALLOC           (1<<14)
  84
  85 #define DCERPC_AUTH_OPTIONS    (DCERPC_SEAL|DCERPC_SIGN|DCERPC_SCHANNEL|DCERPC_AUTH_SPNEGO|DCERPC_AUTH_KRB5|DCERPC_AUTH_NTLM)
  86
  87 /* select spnego auth */
  88 #define DCERPC_AUTH_SPNEGO             (1<<15)
  89
  90 /* select krb5 auth */
  91 #define DCERPC_AUTH_KRB5               (1<<16)
  92
  93 #define DCERPC_SMB2                    (1<<17)
  94
  95 /* select NTLM auth */
  96 #define DCERPC_AUTH_NTLM               (1<<18)
  97
  98 /* this triggers the DCERPC_PFC_FLAG_CONC_MPX flag in the bind request */
  99 #define DCERPC_CONCURRENT_MULTIPLEX     (1<<19)
 100
 101 /* this indicates DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN flag was negotiated */
 102 #define DCERPC_HEADER_SIGNING          (1<<20)
 103
 104 /* use NDR64 transport */
 105 #define DCERPC_NDR64                   (1<<21)
 106
 107 /* specify binding interface */
 108 #define DCERPC_LOCALADDRESS            (1<<22)
 109
 110 /* handle upgrades or downgrades automatically */
 111 #define DCERPC_SCHANNEL_AUTO           (1<<23)
 112
 113 /* use aes schannel with hmac-sh256 session key */
 114 #define DCERPC_SCHANNEL_AES            (1<<24)
 115
 116 /* this triggers the DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN flag in the bind request */
 117 #define DCERPC_PROPOSE_HEADER_SIGNING          (1<<25)
 118
 119 /* The following definitions come from ../librpc/rpc/dcerpc_error.c  */
 120
 121 const char *dcerpc_errstr(TALLOC_CTX *mem_ctx, uint32_t fault_code);
 122 NTSTATUS dcerpc_fault_to_nt_status(uint32_t fault_code);
 123
 124 /* The following definitions come from ../librpc/rpc/binding.c  */
 125
 126 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor);
 127 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor);
 128 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot);
 129 struct dcerpc_binding *dcerpc_binding_dup(TALLOC_CTX *mem_ctx,
 130                                           const struct dcerpc_binding *b);
 131 NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx,
 132                                     const struct dcerpc_binding *binding,
 133                                     struct epm_tower *tower);
 134 NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx,
 135                                    struct epm_tower *tower,
 136                                    struct dcerpc_binding **b_out);
 137 NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out);
 138 char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b);
 139 NTSTATUS dcerpc_floor_get_lhs_data(const struct epm_floor *epm_floor, struct ndr_syntax_id *syntax);
 140 const char *derpc_transport_string_by_transport(enum dcerpc_transport_t t);
 141 enum dcerpc_transport_t dcerpc_transport_by_tower(const struct epm_tower *tower);
 142
 143 /* The following definitions come from ../librpc/rpc/dcerpc_util.c  */
 144
 145 void dcerpc_set_frag_length(DATA_BLOB *blob, uint16_t v);
 146 uint16_t dcerpc_get_frag_length(const DATA_BLOB *blob);
 147 void dcerpc_set_auth_length(DATA_BLOB *blob, uint16_t v);
 148 uint8_t dcerpc_get_endian_flag(DATA_BLOB *blob);
 149 const char *dcerpc_default_transport_endpoint(TALLOC_CTX *mem_ctx,
 150                                               enum dcerpc_transport_t transport,
 151                                               const struct ndr_interface_table *table);
 152
 153 /**
 154 * @brief        Pull a dcerpc_auth structure, taking account of any auth
 155 *               padding in the blob. For request/response packets we pass
 156 *               the whole data blob, so auth_data_only must be set to false
 157 *               as the blob contains data+pad+auth and no just pad+auth.
 158 *
 159 * @param pkt            - The ncacn_packet strcuture
 160 * @param mem_ctx        - The mem_ctx used to allocate dcerpc_auth elements
 161 * @param pkt_trailer    - The packet trailer data, usually the trailing
 162 *                         auth_info blob, but in the request/response case
 163 *                         this is the stub_and_verifier blob.
 164 * @param auth           - A preallocated dcerpc_auth *empty* structure
 165 * @param auth_length    - The length of the auth trail, sum of auth header
 166 *                         lenght and pkt->auth_length
 167 * @param auth_data_only - Whether the pkt_trailer includes only the auth_blob
 168 *                         (+ padding) or also other data.
 169 *
 170 * @return               - A NTSTATUS error code.
 171 */
 172 NTSTATUS dcerpc_pull_auth_trailer(struct ncacn_packet *pkt,
 173                                   TALLOC_CTX *mem_ctx,
 174                                   DATA_BLOB *pkt_trailer,
 175                                   struct dcerpc_auth *auth,
 176                                   uint32_t *auth_length,
 177                                   bool auth_data_only);
 178 struct tevent_req *dcerpc_read_ncacn_packet_send(TALLOC_CTX *mem_ctx,
 179                                                  struct tevent_context *ev,
 180                                                  struct tstream_context *stream);
 181 NTSTATUS dcerpc_read_ncacn_packet_recv(struct tevent_req *req,
 182                                        TALLOC_CTX *mem_ctx,
 183                                        struct ncacn_packet **pkt,
 184                                        DATA_BLOB *buffer);
 185
 186 /* The following definitions come from ../librpc/rpc/binding_handle.c  */
 187
 188 struct dcerpc_binding_handle_ops {
 189         const char *name;
 190
 191         bool (*is_connected)(struct dcerpc_binding_handle *h);
 192         uint32_t (*set_timeout)(struct dcerpc_binding_handle *h,
 193                                 uint32_t timeout);
 194
 195         void (*auth_info)(struct dcerpc_binding_handle *h,
 196                           enum dcerpc_AuthType *auth_type,
 197                           enum dcerpc_AuthLevel *auth_level);
 198
 199         struct tevent_req *(*raw_call_send)(TALLOC_CTX *mem_ctx,
 200                                             struct tevent_context *ev,
 201                                             struct dcerpc_binding_handle *h,
 202                                             const struct GUID *object,
 203                                             uint32_t opnum,
 204                                             uint32_t in_flags,
 205                                             const uint8_t *in_data,
 206                                             size_t in_length);
 207         NTSTATUS (*raw_call_recv)(struct tevent_req *req,
 208                                   TALLOC_CTX *mem_ctx,
 209                                   uint8_t **out_data,
 210                                   size_t *out_length,
 211                                   uint32_t *out_flags);
 212
 213         struct tevent_req *(*disconnect_send)(TALLOC_CTX *mem_ctx,
 214                                               struct tevent_context *ev,
 215                                               struct dcerpc_binding_handle *h);
 216         NTSTATUS (*disconnect_recv)(struct tevent_req *req);
 217
 218         /* TODO: remove the following functions */
 219         bool (*push_bigendian)(struct dcerpc_binding_handle *h);
 220         bool (*ref_alloc)(struct dcerpc_binding_handle *h);
 221         bool (*use_ndr64)(struct dcerpc_binding_handle *h);
 222         void (*do_ndr_print)(struct dcerpc_binding_handle *h,
 223                              int ndr_flags,
 224                              const void *struct_ptr,
 225                              const struct ndr_interface_call *call);
 226         void (*ndr_push_failed)(struct dcerpc_binding_handle *h,
 227                                 NTSTATUS error,
 228                                 const void *struct_ptr,
 229                                 const struct ndr_interface_call *call);
 230         void (*ndr_pull_failed)(struct dcerpc_binding_handle *h,
 231                                 NTSTATUS error,
 232                                 const DATA_BLOB *blob,
 233                                 const struct ndr_interface_call *call);
 234         NTSTATUS (*ndr_validate_in)(struct dcerpc_binding_handle *h,
 235                                     TALLOC_CTX *mem_ctx,
 236                                     const DATA_BLOB *blob,
 237                                     const struct ndr_interface_call *call);
 238         NTSTATUS (*ndr_validate_out)(struct dcerpc_binding_handle *h,
 239                                      struct ndr_pull *pull_in,
 240                                      const void *struct_ptr,
 241                                      const struct ndr_interface_call *call);
 242 };
 243
 244 struct dcerpc_binding_handle *_dcerpc_binding_handle_create(TALLOC_CTX *mem_ctx,
 245                                         const struct dcerpc_binding_handle_ops *ops,
 246                                         const struct GUID *object,
 247                                         const struct ndr_interface_table *table,
 248                                         void *pstate,
 249                                         size_t psize,
 250                                         const char *type,
 251                                         const char *location);
 252 #define dcerpc_binding_handle_create(mem_ctx, ops, object, table, \
 253                                 state, type, location) \
 254         _dcerpc_binding_handle_create(mem_ctx, ops, object, table, \
 255                                 state, sizeof(type), #type, location)
 256
 257 void *_dcerpc_binding_handle_data(struct dcerpc_binding_handle *h);
 258 #define dcerpc_binding_handle_data(_h, _type) \
 259         talloc_get_type_abort(_dcerpc_binding_handle_data(_h), _type)
 260
 261 _DEPRECATED_ void dcerpc_binding_handle_set_sync_ev(struct dcerpc_binding_handle *h,
 262                                                     struct tevent_context *ev);
 263
 264 bool dcerpc_binding_handle_is_connected(struct dcerpc_binding_handle *h);
 265
 266 uint32_t dcerpc_binding_handle_set_timeout(struct dcerpc_binding_handle *h,
 267                                            uint32_t timeout);
 268
 269 void dcerpc_binding_handle_auth_info(struct dcerpc_binding_handle *h,
 270                                      enum dcerpc_AuthType *auth_type,
 271                                      enum dcerpc_AuthLevel *auth_level);
 272
 273 struct tevent_req *dcerpc_binding_handle_raw_call_send(TALLOC_CTX *mem_ctx,
 274                                                 struct tevent_context *ev,
 275                                                 struct dcerpc_binding_handle *h,
 276                                                 const struct GUID *object,
 277                                                 uint32_t opnum,
 278                                                 uint32_t in_flags,
 279                                                 const uint8_t *in_data,
 280                                                 size_t in_length);
 281 NTSTATUS dcerpc_binding_handle_raw_call_recv(struct tevent_req *req,
 282                                              TALLOC_CTX *mem_ctx,
 283                                              uint8_t **out_data,
 284                                              size_t *out_length,
 285                                              uint32_t *out_flags);
 286 NTSTATUS dcerpc_binding_handle_raw_call(struct dcerpc_binding_handle *h,
 287                                         const struct GUID *object,
 288                                         uint32_t opnum,
 289                                         uint32_t in_flags,
 290                                         const uint8_t *in_data,
 291                                         size_t in_length,
 292                                         TALLOC_CTX *mem_ctx,
 293                                         uint8_t **out_data,
 294                                         size_t *out_length,
 295                                         uint32_t *out_flags);
 296
 297 struct tevent_req *dcerpc_binding_handle_disconnect_send(TALLOC_CTX *mem_ctx,
 298                                                 struct tevent_context *ev,
 299                                                 struct dcerpc_binding_handle *h);
 300 NTSTATUS dcerpc_binding_handle_disconnect_recv(struct tevent_req *req);
 301
 302 struct tevent_req *dcerpc_binding_handle_call_send(TALLOC_CTX *mem_ctx,
 303                                         struct tevent_context *ev,
 304                                         struct dcerpc_binding_handle *h,
 305                                         const struct GUID *object,
 306                                         const struct ndr_interface_table *table,
 307                                         uint32_t opnum,
 308                                         TALLOC_CTX *r_mem,
 309                                         void *r_ptr);
 310 NTSTATUS dcerpc_binding_handle_call_recv(struct tevent_req *req);
 311 NTSTATUS dcerpc_binding_handle_call(struct dcerpc_binding_handle *h,
 312                                     const struct GUID *object,
 313                                     const struct ndr_interface_table *table,
 314                                     uint32_t opnum,
 315                                     TALLOC_CTX *r_mem,
 316                                     void *r_ptr);
 317
 318 /**
 319  * Extract header information from a ncacn_packet
 320  * as a dcerpc_sec_vt_header2 as used by the security verification trailer.
 321  *
 322  * @param[in] pkt a packet
 323  *
 324  * @return a dcerpc_sec_vt_header2
 325  */
 326 struct dcerpc_sec_vt_header2 dcerpc_sec_vt_header2_from_ncacn_packet(const struct ncacn_packet *pkt);
 327
 328
 329 /**
 330  * Test if two dcerpc_sec_vt_header2 structures are equal
 331  * without consideration of reserved fields.
 332  *
 333  * @param v1 a pointer to a dcerpc_sec_vt_header2 structure
 334  * @param v2 a pointer to a dcerpc_sec_vt_header2 structure
 335  *
 336  * @retval true if *v1 equals *v2
 337  */
 338 bool dcerpc_sec_vt_header2_equal(const struct dcerpc_sec_vt_header2 *v1,
 339                                  const struct dcerpc_sec_vt_header2 *v2);
 340
 341 /**
 342  * Check for consistency of the security verification trailer with the PDU header.
 343  * See <a href="http://msdn.microsoft.com/en-us/library/cc243559.aspx">MS-RPCE 2.2.2.13</a>.
 344  * A check with an empty trailer succeeds.
 345  *
 346  * @param[in] vt a pointer to the security verification trailer.
 347  * @param[in] bitmask1 which flags were negotiated on the connection.
 348  * @param[in] pcontext the syntaxes negotiatied for the presentation context.
 349  * @param[in] header2 some fields from the PDU header.
 350  *
 351  * @retval true on success.
 352  */
 353 bool dcerpc_sec_verification_trailer_check(
 354                 const struct dcerpc_sec_verification_trailer *vt,
 355                 const uint32_t *bitmask1,
 356                 const struct dcerpc_sec_vt_pcontext *pcontext,
 357                 const struct dcerpc_sec_vt_header2 *header2);
 358
 359 #endif /* __DEFAULT_LIBRPC_RPCCOMMON_H__ */