source4/rpc_server/dcesrv_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    server side dcerpc authentication code
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Stefan (metze) Metzmacher 2004
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "rpc_server/dcerpc_server.h"
  25 #include "rpc_server/dcerpc_server_proto.h"
  26 #include "rpc_server/common/proto.h"
  27 #include "librpc/rpc/dcerpc_proto.h"
  28 #include "librpc/gen_ndr/ndr_dcerpc.h"
  29 #include "auth/credentials/credentials.h"
  30 #include "auth/gensec/gensec.h"
  31 #include "auth/auth.h"
  32 #include "param/param.h"
  33 #include "librpc/rpc/rpc_common.h"
  34
  35 static NTSTATUS dcesrv_auth_negotiate_hdr_signing(struct dcesrv_call_state *call,
  36                                                   struct ncacn_packet *pkt)
  37 {
  38         struct dcesrv_connection *dce_conn = call->conn;
  39         struct dcesrv_auth *a = NULL;
  40
  41         if (!(call->pkt.pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN)) {
  42                 return NT_STATUS_OK;
  43         }
  44
  45         if (dce_conn->client_hdr_signing) {
  46                 if (dce_conn->negotiated_hdr_signing && pkt != NULL) {
  47                         pkt->pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
  48                 }
  49                 return NT_STATUS_OK;
  50         }
  51
  52         dce_conn->client_hdr_signing = true;
  53         dce_conn->negotiated_hdr_signing = dce_conn->support_hdr_signing;
  54
  55         if (!dce_conn->negotiated_hdr_signing) {
  56                 return NT_STATUS_OK;
  57         }
  58
  59         if (pkt != NULL) {
  60                 pkt->pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
  61         }
  62
  63         a = call->conn->default_auth_state;
  64         if (a->gensec_security != NULL) {
  65                 gensec_want_feature(a->gensec_security,
  66                                     GENSEC_FEATURE_SIGN_PKT_HEADER);
  67         }
  68
  69         for (a = call->conn->auth_states; a != NULL; a = a->next) {
  70                 if (a->gensec_security == NULL) {
  71                         continue;
  72                 }
  73
  74                 gensec_want_feature(a->gensec_security,
  75                                     GENSEC_FEATURE_SIGN_PKT_HEADER);
  76         }
  77
  78         return NT_STATUS_OK;
  79 }
  80
  81 static bool dcesrv_auth_prepare_gensec(struct dcesrv_call_state *call)
  82 {
  83         struct cli_credentials *server_credentials = NULL;
  84         struct dcesrv_connection *dce_conn = call->conn;
  85         struct dcesrv_auth *auth = call->auth_state;
  86         NTSTATUS status;
  87
  88         if (auth->auth_started) {
  89                 return false;
  90         }
  91
  92         auth->auth_started = true;
  93
  94         if (auth->auth_invalid) {
  95                 return false;
  96         }
  97
  98         if (auth->auth_finished) {
  99                 return false;
 100         }
 101
 102         if (auth->gensec_security != NULL) {
 103                 return false;
 104         }
 105
 106         switch (call->in_auth_info.auth_level) {
 107         case DCERPC_AUTH_LEVEL_CONNECT:
 108         case DCERPC_AUTH_LEVEL_CALL:
 109         case DCERPC_AUTH_LEVEL_PACKET:
 110         case DCERPC_AUTH_LEVEL_INTEGRITY:
 111         case DCERPC_AUTH_LEVEL_PRIVACY:
 112                 /*
 113                  * We evaluate auth_type only if auth_level was valid
 114                  */
 115                 break;
 116         default:
 117                 /*
 118                  * Setting DCERPC_AUTH_LEVEL_NONE,
 119                  * gives the caller the reject_reason
 120                  * as auth_context_id.
 121                  *
 122                  * Note: DCERPC_AUTH_LEVEL_NONE == 1
 123                  */
 124                 auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 125                 auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 126                 auth->auth_context_id = DCERPC_BIND_NAK_REASON_NOT_SPECIFIED;
 127                 return false;
 128         }
 129
 130         auth->auth_type = call->in_auth_info.auth_type;
 131         auth->auth_level = call->in_auth_info.auth_level;
 132         auth->auth_context_id = call->in_auth_info.auth_context_id;
 133
 134         server_credentials
 135                 = cli_credentials_init(auth);
 136         if (!server_credentials) {
 137                 DEBUG(1, ("Failed to init server credentials\n"));
 138                 return false;
 139         }
 140
 141         cli_credentials_set_conf(server_credentials, call->conn->dce_ctx->lp_ctx);
 142         status = cli_credentials_set_machine_account(server_credentials, call->conn->dce_ctx->lp_ctx);
 143         if (!NT_STATUS_IS_OK(status)) {
 144                 DEBUG(1, ("Failed to obtain server credentials: %s\n",
 145                           nt_errstr(status)));
 146                 return false;
 147         }
 148
 149         status = samba_server_gensec_start(auth,
 150                                            call->event_ctx,
 151                                            call->msg_ctx,
 152                                            call->conn->dce_ctx->lp_ctx,
 153                                            server_credentials,
 154                                            NULL,
 155                                            &auth->gensec_security);
 156         if (!NT_STATUS_IS_OK(status)) {
 157                 DEBUG(1, ("Failed to call samba_server_gensec_start %s\n",
 158                           nt_errstr(status)));
 159                 return false;
 160         }
 161
 162         /*
 163          * We have to call this because we set the target_service for
 164          * Kerberos to NULL above, and in any case we wish to log a
 165          * more specific service target.
 166          *
 167          */
 168         status = gensec_set_target_service_description(auth->gensec_security,
 169                                                        "DCE/RPC");
 170         if (!NT_STATUS_IS_OK(status)) {
 171                 DEBUG(1, ("Failed to call gensec_set_target_service_description %s\n",
 172                           nt_errstr(status)));
 173                 return false;
 174         }
 175
 176         if (call->conn->remote_address != NULL) {
 177                 status = gensec_set_remote_address(auth->gensec_security,
 178                                                 call->conn->remote_address);
 179                 if (!NT_STATUS_IS_OK(status)) {
 180                         DEBUG(1, ("Failed to call gensec_set_remote_address() %s\n",
 181                                   nt_errstr(status)));
 182                         return false;
 183                 }
 184         }
 185
 186         if (call->conn->local_address != NULL) {
 187                 status = gensec_set_local_address(auth->gensec_security,
 188                                                   call->conn->local_address);
 189                 if (!NT_STATUS_IS_OK(status)) {
 190                         DEBUG(1, ("Failed to call gensec_set_local_address() %s\n",
 191                                   nt_errstr(status)));
 192                         return false;
 193                 }
 194         }
 195
 196         status = gensec_start_mech_by_authtype(auth->gensec_security, auth->auth_type,
 197                                                auth->auth_level);
 198         if (!NT_STATUS_IS_OK(status)) {
 199                 const char *backend_name =
 200                         gensec_get_name_by_authtype(auth->gensec_security,
 201                                                     auth->auth_type);
 202
 203                 DEBUG(3, ("Failed to start GENSEC mechanism for DCERPC server: "
 204                           "auth_type=%d (%s), auth_level=%d: %s\n",
 205                           (int)auth->auth_type, backend_name,
 206                           (int)auth->auth_level,
 207                           nt_errstr(status)));
 208
 209                 /*
 210                  * Setting DCERPC_AUTH_LEVEL_NONE,
 211                  * gives the caller the reject_reason
 212                  * as auth_context_id.
 213                  *
 214                  * Note: DCERPC_AUTH_LEVEL_NONE == 1
 215                  */
 216                 auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 217                 auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 218                 if (backend_name != NULL) {
 219                         auth->auth_context_id =
 220                                 DCERPC_BIND_NAK_REASON_INVALID_CHECKSUM;
 221                 } else {
 222                         auth->auth_context_id =
 223                                 DCERPC_BIND_NAK_REASON_INVALID_AUTH_TYPE;
 224                 }
 225                 return false;
 226         }
 227
 228         if (dce_conn->negotiated_hdr_signing) {
 229                 gensec_want_feature(auth->gensec_security,
 230                                     GENSEC_FEATURE_SIGN_PKT_HEADER);
 231         }
 232
 233         return true;
 234 }
 235
 236 static void log_successful_dcesrv_authz_event(struct dcesrv_call_state *call)
 237 {
 238         struct dcesrv_auth *auth = call->auth_state;
 239         enum dcerpc_transport_t transport =
 240                 dcerpc_binding_get_transport(call->conn->endpoint->ep_description);
 241         const char *auth_type = derpc_transport_string_by_transport(transport);
 242         const char *transport_protection = AUTHZ_TRANSPORT_PROTECTION_NONE;
 243
 244         if (transport == NCACN_NP) {
 245                 transport_protection = AUTHZ_TRANSPORT_PROTECTION_SMB;
 246         }
 247
 248         /*
 249          * Log the authorization to this RPC interface.  This
 250          * covered ncacn_np pass-through auth, and anonymous
 251          * DCE/RPC (eg epmapper, netlogon etc)
 252          */
 253         log_successful_authz_event(call->conn->msg_ctx,
 254                                    call->conn->dce_ctx->lp_ctx,
 255                                    call->conn->remote_address,
 256                                    call->conn->local_address,
 257                                    "DCE/RPC",
 258                                    auth_type,
 259                                    transport_protection,
 260                                    auth->session_info);
 261
 262         auth->auth_audited = true;
 263 }
 264
 265 static void dcesrv_default_auth_state_finish_bind(struct dcesrv_call_state *call)
 266 {
 267         SMB_ASSERT(call->pkt.ptype == DCERPC_PKT_BIND);
 268
 269         if (call->auth_state == call->conn->default_auth_state) {
 270                 return;
 271         }
 272
 273         if (call->conn->default_auth_state->auth_started) {
 274                 return;
 275         }
 276
 277         if (call->conn->default_auth_state->auth_invalid) {
 278                 return;
 279         }
 280
 281         call->conn->default_auth_state->auth_type = DCERPC_AUTH_TYPE_NONE;
 282         call->conn->default_auth_state->auth_level = DCERPC_AUTH_LEVEL_NONE;
 283         call->conn->default_auth_state->auth_context_id = 0;
 284         call->conn->default_auth_state->auth_started = true;
 285         call->conn->default_auth_state->auth_finished = true;
 286
 287         /*
 288          *
 289          * We defer log_successful_dcesrv_authz_event()
 290          * to dcesrv_default_auth_state_prepare_request()
 291          *
 292          * As we don't want to trigger authz_events
 293          * just for alter_context requests without authentication
 294          */
 295 }
 296
 297 void dcesrv_default_auth_state_prepare_request(struct dcesrv_call_state *call)
 298 {
 299         struct dcesrv_connection *dce_conn = call->conn;
 300         struct dcesrv_auth *auth = call->auth_state;
 301
 302         if (auth->auth_audited) {
 303                 return;
 304         }
 305
 306         if (call->pkt.ptype != DCERPC_PKT_REQUEST) {
 307                 return;
 308         }
 309
 310         if (auth != dce_conn->default_auth_state) {
 311                 return;
 312         }
 313
 314         if (auth->auth_invalid) {
 315                 return;
 316         }
 317
 318         if (!auth->auth_finished) {
 319                 return;
 320         }
 321
 322         log_successful_dcesrv_authz_event(call);
 323 }
 324
 325 /*
 326   parse any auth information from a dcerpc bind request
 327   return false if we can't handle the auth request for some
 328   reason (in which case we send a bind_nak)
 329 */
 330 bool dcesrv_auth_bind(struct dcesrv_call_state *call)
 331 {
 332         struct ncacn_packet *pkt = &call->pkt;
 333         struct dcesrv_auth *auth = call->auth_state;
 334         NTSTATUS status;
 335
 336         if (pkt->auth_length == 0) {
 337                 auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 338                 auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 339                 auth->auth_context_id = 0;
 340                 auth->auth_started = true;
 341
 342                 log_successful_dcesrv_authz_event(call);
 343
 344                 return true;
 345         }
 346
 347         status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.bind.auth_info,
 348                                           &call->in_auth_info,
 349                                           NULL, true);
 350         if (!NT_STATUS_IS_OK(status)) {
 351                 /*
 352                  * Setting DCERPC_AUTH_LEVEL_NONE,
 353                  * gives the caller the reject_reason
 354                  * as auth_context_id.
 355                  *
 356                  * Note: DCERPC_AUTH_LEVEL_NONE == 1
 357                  */
 358                 auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 359                 auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 360                 auth->auth_context_id =
 361                         DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED;
 362                 return false;
 363         }
 364
 365         return dcesrv_auth_prepare_gensec(call);
 366 }
 367
 368 NTSTATUS dcesrv_auth_complete(struct dcesrv_call_state *call, NTSTATUS status)
 369 {
 370         struct dcesrv_auth *auth = call->auth_state;
 371         const char *pdu = "<unknown>";
 372
 373         switch (call->pkt.ptype) {
 374         case DCERPC_PKT_BIND:
 375                 pdu = "BIND";
 376                 break;
 377         case DCERPC_PKT_ALTER:
 378                 pdu = "ALTER";
 379                 break;
 380         case DCERPC_PKT_AUTH3:
 381                 pdu = "AUTH3";
 382                 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 383                         DEBUG(4, ("GENSEC not finished at at %s\n", pdu));
 384                         return NT_STATUS_RPC_SEC_PKG_ERROR;
 385                 }
 386                 break;
 387         default:
 388                 return NT_STATUS_INTERNAL_ERROR;
 389         }
 390
 391         if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 392                 return NT_STATUS_OK;
 393         }
 394
 395         if (!NT_STATUS_IS_OK(status)) {
 396                 DEBUG(4, ("GENSEC mech rejected the incoming authentication "
 397                           "at %s: %s\n", pdu, nt_errstr(status)));
 398                 return status;
 399         }
 400
 401         status = gensec_session_info(auth->gensec_security,
 402                                      auth,
 403                                      &auth->session_info);
 404         if (!NT_STATUS_IS_OK(status)) {
 405                 DEBUG(1, ("Failed to establish session_info: %s\n",
 406                           nt_errstr(status)));
 407                 return status;
 408         }
 409         auth->auth_finished = true;
 410
 411         if (auth->auth_level == DCERPC_AUTH_LEVEL_CONNECT &&
 412             !call->conn->got_explicit_auth_level_connect)
 413         {
 414                 call->conn->default_auth_level_connect = auth;
 415         }
 416
 417         if (call->pkt.ptype != DCERPC_PKT_AUTH3) {
 418                 return NT_STATUS_OK;
 419         }
 420
 421         if (call->out_auth_info->credentials.length != 0) {
 422                 DEBUG(4, ("GENSEC produced output token (len=%zu) at %s\n",
 423                           call->out_auth_info->credentials.length, pdu));
 424                 return NT_STATUS_RPC_SEC_PKG_ERROR;
 425         }
 426
 427         return NT_STATUS_OK;
 428 }
 429
 430 /*
 431   add any auth information needed in a bind ack, and process the authentication
 432   information found in the bind.
 433 */
 434 NTSTATUS dcesrv_auth_prepare_bind_ack(struct dcesrv_call_state *call, struct ncacn_packet *pkt)
 435 {
 436         struct dcesrv_connection *dce_conn = call->conn;
 437         struct dcesrv_auth *auth = call->auth_state;
 438         NTSTATUS status;
 439
 440         status = dcesrv_auth_negotiate_hdr_signing(call, pkt);
 441         if (!NT_STATUS_IS_OK(status)) {
 442                 return status;
 443         }
 444
 445         dce_conn->allow_alter = true;
 446         dcesrv_default_auth_state_finish_bind(call);
 447
 448         if (call->pkt.auth_length == 0) {
 449                 auth->auth_finished = true;
 450                 return NT_STATUS_OK;
 451         }
 452
 453         /* We can't work without an existing gensec state */
 454         if (auth->gensec_security == NULL) {
 455                 return NT_STATUS_INTERNAL_ERROR;
 456         }
 457
 458         call->_out_auth_info = (struct dcerpc_auth) {
 459                 .auth_type = auth->auth_type,
 460                 .auth_level = auth->auth_level,
 461                 .auth_context_id = auth->auth_context_id,
 462         };
 463         call->out_auth_info = &call->_out_auth_info;
 464
 465         return NT_STATUS_OK;
 466 }
 467
 468 /*
 469   process the final stage of a auth request
 470 */
 471 bool dcesrv_auth_prepare_auth3(struct dcesrv_call_state *call)
 472 {
 473         struct ncacn_packet *pkt = &call->pkt;
 474         struct dcesrv_auth *auth = call->auth_state;
 475         NTSTATUS status;
 476
 477         if (pkt->auth_length == 0) {
 478                 return false;
 479         }
 480
 481         if (auth->auth_finished) {
 482                 return false;
 483         }
 484
 485         /* We can't work without an existing gensec state */
 486         if (auth->gensec_security == NULL) {
 487                 return false;
 488         }
 489
 490         status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.auth3.auth_info,
 491                                           &call->in_auth_info, NULL, true);
 492         if (!NT_STATUS_IS_OK(status)) {
 493                 /*
 494                  * Windows returns DCERPC_NCA_S_FAULT_REMOTE_NO_MEMORY
 495                  * instead of DCERPC_NCA_S_PROTO_ERROR.
 496                  */
 497                 call->fault_code = DCERPC_NCA_S_FAULT_REMOTE_NO_MEMORY;
 498                 return false;
 499         }
 500
 501         if (call->in_auth_info.auth_type != auth->auth_type) {
 502                 return false;
 503         }
 504
 505         if (call->in_auth_info.auth_level != auth->auth_level) {
 506                 return false;
 507         }
 508
 509         if (call->in_auth_info.auth_context_id != auth->auth_context_id) {
 510                 return false;
 511         }
 512
 513         call->_out_auth_info = (struct dcerpc_auth) {
 514                 .auth_type = auth->auth_type,
 515                 .auth_level = auth->auth_level,
 516                 .auth_context_id = auth->auth_context_id,
 517         };
 518         call->out_auth_info = &call->_out_auth_info;
 519
 520         return true;
 521 }
 522
 523 /*
 524   parse any auth information from a dcerpc alter request
 525   return false if we can't handle the auth request for some
 526   reason (in which case we send a bind_nak (is this true for here?))
 527 */
 528 bool dcesrv_auth_alter(struct dcesrv_call_state *call)
 529 {
 530         struct ncacn_packet *pkt = &call->pkt;
 531         struct dcesrv_auth *auth = call->auth_state;
 532         NTSTATUS status;
 533
 534         /* on a pure interface change there is no auth blob */
 535         if (pkt->auth_length == 0) {
 536                 if (!auth->auth_finished) {
 537                         return false;
 538                 }
 539                 return true;
 540         }
 541
 542         if (auth->auth_finished) {
 543                 call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
 544                 return false;
 545         }
 546
 547         status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.alter.auth_info,
 548                                           &call->in_auth_info, NULL, true);
 549         if (!NT_STATUS_IS_OK(status)) {
 550                 call->fault_code = DCERPC_NCA_S_PROTO_ERROR;
 551                 return false;
 552         }
 553
 554         if (!auth->auth_started) {
 555                 bool ok;
 556
 557                 ok = dcesrv_auth_prepare_gensec(call);
 558                 if (!ok) {
 559                         call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
 560                         return false;
 561                 }
 562
 563                 return true;
 564         }
 565
 566         if (call->in_auth_info.auth_type == DCERPC_AUTH_TYPE_NONE) {
 567                 call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
 568                 return false;
 569         }
 570
 571         if (call->in_auth_info.auth_type != auth->auth_type) {
 572                 return false;
 573         }
 574
 575         if (call->in_auth_info.auth_level != auth->auth_level) {
 576                 return false;
 577         }
 578
 579         if (call->in_auth_info.auth_context_id != auth->auth_context_id) {
 580                 return false;
 581         }
 582
 583         return true;
 584 }
 585
 586 /*
 587   add any auth information needed in a alter ack, and process the authentication
 588   information found in the alter.
 589 */
 590 NTSTATUS dcesrv_auth_prepare_alter_ack(struct dcesrv_call_state *call, struct ncacn_packet *pkt)
 591 {
 592         struct dcesrv_auth *auth = call->auth_state;
 593         NTSTATUS status;
 594
 595         status = dcesrv_auth_negotiate_hdr_signing(call, pkt);
 596         if (!NT_STATUS_IS_OK(status)) {
 597                 return status;
 598         }
 599
 600         /* on a pure interface change there is no auth_info structure
 601            setup */
 602         if (call->pkt.auth_length == 0) {
 603                 return NT_STATUS_OK;
 604         }
 605
 606         if (auth->gensec_security == NULL) {
 607                 return NT_STATUS_INTERNAL_ERROR;
 608         }
 609
 610         call->_out_auth_info = (struct dcerpc_auth) {
 611                 .auth_type = auth->auth_type,
 612                 .auth_level = auth->auth_level,
 613                 .auth_context_id = auth->auth_context_id,
 614         };
 615         call->out_auth_info = &call->_out_auth_info;
 616
 617         return NT_STATUS_OK;
 618 }
 619
 620 /*
 621   check credentials on a packet
 622 */
 623 bool dcesrv_auth_pkt_pull(struct dcesrv_call_state *call,
 624                           DATA_BLOB *full_packet,
 625                           uint8_t required_flags,
 626                           uint8_t optional_flags,
 627                           uint8_t payload_offset,
 628                           DATA_BLOB *payload_and_verifier)
 629 {
 630         struct ncacn_packet *pkt = &call->pkt;
 631         struct dcesrv_auth *auth = call->auth_state;
 632         const struct dcerpc_auth tmp_auth = {
 633                 .auth_type = auth->auth_type,
 634                 .auth_level = auth->auth_level,
 635                 .auth_context_id = auth->auth_context_id,
 636         };
 637         NTSTATUS status;
 638
 639         if (!auth->auth_started) {
 640                 return false;
 641         }
 642
 643         if (!auth->auth_finished) {
 644                 call->fault_code = DCERPC_NCA_S_PROTO_ERROR;
 645                 return false;
 646         }
 647
 648         if (auth->auth_invalid) {
 649                 return false;
 650         }
 651
 652         status = dcerpc_ncacn_pull_pkt_auth(&tmp_auth,
 653                                             auth->gensec_security,
 654                                             call,
 655                                             pkt->ptype,
 656                                             required_flags,
 657                                             optional_flags,
 658                                             payload_offset,
 659                                             payload_and_verifier,
 660                                             full_packet,
 661                                             pkt);
 662         if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) {
 663                 call->fault_code = DCERPC_NCA_S_PROTO_ERROR;
 664                 return false;
 665         }
 666         if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_UNSUPPORTED_AUTHN_LEVEL)) {
 667                 call->fault_code = DCERPC_NCA_S_UNSUPPORTED_AUTHN_LEVEL;
 668                 return false;
 669         }
 670         if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_SEC_PKG_ERROR)) {
 671                 call->fault_code = DCERPC_FAULT_SEC_PKG_ERROR;
 672                 return false;
 673         }
 674         if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 675                 call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
 676                 return false;
 677         }
 678         if (!NT_STATUS_IS_OK(status)) {
 679                 return false;
 680         }
 681
 682         return true;
 683 }
 684
 685 /*
 686    push a signed or sealed dcerpc request packet into a blob
 687 */
 688 bool dcesrv_auth_pkt_push(struct dcesrv_call_state *call,
 689                           DATA_BLOB *blob, size_t sig_size,
 690                           uint8_t payload_offset,
 691                           const DATA_BLOB *payload,
 692                           const struct ncacn_packet *pkt)
 693 {
 694         struct dcesrv_auth *auth = call->auth_state;
 695         const struct dcerpc_auth tmp_auth = {
 696                 .auth_type = auth->auth_type,
 697                 .auth_level = auth->auth_level,
 698                 .auth_context_id = auth->auth_context_id,
 699         };
 700         NTSTATUS status;
 701
 702         status = dcerpc_ncacn_push_pkt_auth(&tmp_auth,
 703                                             auth->gensec_security,
 704                                             call, blob, sig_size,
 705                                             payload_offset,
 706                                             payload,
 707                                             pkt);
 708         return NT_STATUS_IS_OK(status);
 709 }