source3/rpc_client/cli_pipe.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client routines
   4  *  Largely rewritten by Jeremy Allison             2005.
   5  *  Heavily modified by Simo Sorce                  2010.
   6  *  Copyright Andrew Bartlett                       2011.
   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 #include "includes.h"
  23 #include "../lib/util/tevent_ntstatus.h"
  24 #include "librpc/gen_ndr/ndr_epmapper_c.h"
  25 #include "../librpc/gen_ndr/ndr_schannel.h"
  26 #include "../librpc/gen_ndr/ndr_dssetup.h"
  27 #include "../libcli/auth/schannel.h"
  28 #include "../libcli/auth/spnego.h"
  29 #include "../auth/ntlmssp/ntlmssp.h"
  30 #include "auth_generic.h"
  31 #include "librpc/gen_ndr/ndr_dcerpc.h"
  32 #include "librpc/rpc/dcerpc.h"
  33 #include "librpc/crypto/gse.h"
  34 #include "librpc/crypto/spnego.h"
  35 #include "rpc_dce.h"
  36 #include "cli_pipe.h"
  37 #include "libsmb/libsmb.h"
  38 #include "auth/gensec/gensec.h"
  39
  40 #undef DBGC_CLASS
  41 #define DBGC_CLASS DBGC_RPC_CLI
  42
  43 /********************************************************************
  44  Pipe description for a DEBUG
  45  ********************************************************************/
  46 static const char *rpccli_pipe_txt(TALLOC_CTX *mem_ctx,
  47                                    struct rpc_pipe_client *cli)
  48 {
  49         char *result = talloc_asprintf(mem_ctx, "host %s", cli->desthost);
  50         if (result == NULL) {
  51                 return "pipe";
  52         }
  53         return result;
  54 }
  55
  56 /********************************************************************
  57  Rpc pipe call id.
  58  ********************************************************************/
  59
  60 static uint32 get_rpc_call_id(void)
  61 {
  62         static uint32 call_id = 0;
  63         return ++call_id;
  64 }
  65
  66 /*******************************************************************
  67  Use SMBreadX to get rest of one fragment's worth of rpc data.
  68  Reads the whole size or give an error message
  69  ********************************************************************/
  70
  71 struct rpc_read_state {
  72         struct event_context *ev;
  73         struct rpc_cli_transport *transport;
  74         uint8_t *data;
  75         size_t size;
  76         size_t num_read;
  77 };
  78
  79 static void rpc_read_done(struct tevent_req *subreq);
  80
  81 static struct tevent_req *rpc_read_send(TALLOC_CTX *mem_ctx,
  82                                         struct event_context *ev,
  83                                         struct rpc_cli_transport *transport,
  84                                         uint8_t *data, size_t size)
  85 {
  86         struct tevent_req *req, *subreq;
  87         struct rpc_read_state *state;
  88
  89         req = tevent_req_create(mem_ctx, &state, struct rpc_read_state);
  90         if (req == NULL) {
  91                 return NULL;
  92         }
  93         state->ev = ev;
  94         state->transport = transport;
  95         state->data = data;
  96         state->size = size;
  97         state->num_read = 0;
  98
  99         DEBUG(5, ("rpc_read_send: data_to_read: %u\n", (unsigned int)size));
 100
 101         subreq = transport->read_send(state, ev, (uint8_t *)data, size,
 102                                       transport->priv);
 103         if (subreq == NULL) {
 104                 goto fail;
 105         }
 106         tevent_req_set_callback(subreq, rpc_read_done, req);
 107         return req;
 108
 109  fail:
 110         TALLOC_FREE(req);
 111         return NULL;
 112 }
 113
 114 static void rpc_read_done(struct tevent_req *subreq)
 115 {
 116         struct tevent_req *req = tevent_req_callback_data(
 117                 subreq, struct tevent_req);
 118         struct rpc_read_state *state = tevent_req_data(
 119                 req, struct rpc_read_state);
 120         NTSTATUS status;
 121         ssize_t received;
 122
 123         status = state->transport->read_recv(subreq, &received);
 124         TALLOC_FREE(subreq);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 tevent_req_nterror(req, status);
 127                 return;
 128         }
 129
 130         state->num_read += received;
 131         if (state->num_read == state->size) {
 132                 tevent_req_done(req);
 133                 return;
 134         }
 135
 136         subreq = state->transport->read_send(state, state->ev,
 137                                              state->data + state->num_read,
 138                                              state->size - state->num_read,
 139                                              state->transport->priv);
 140         if (tevent_req_nomem(subreq, req)) {
 141                 return;
 142         }
 143         tevent_req_set_callback(subreq, rpc_read_done, req);
 144 }
 145
 146 static NTSTATUS rpc_read_recv(struct tevent_req *req)
 147 {
 148         return tevent_req_simple_recv_ntstatus(req);
 149 }
 150
 151 struct rpc_write_state {
 152         struct event_context *ev;
 153         struct rpc_cli_transport *transport;
 154         const uint8_t *data;
 155         size_t size;
 156         size_t num_written;
 157 };
 158
 159 static void rpc_write_done(struct tevent_req *subreq);
 160
 161 static struct tevent_req *rpc_write_send(TALLOC_CTX *mem_ctx,
 162                                          struct event_context *ev,
 163                                          struct rpc_cli_transport *transport,
 164                                          const uint8_t *data, size_t size)
 165 {
 166         struct tevent_req *req, *subreq;
 167         struct rpc_write_state *state;
 168
 169         req = tevent_req_create(mem_ctx, &state, struct rpc_write_state);
 170         if (req == NULL) {
 171                 return NULL;
 172         }
 173         state->ev = ev;
 174         state->transport = transport;
 175         state->data = data;
 176         state->size = size;
 177         state->num_written = 0;
 178
 179         DEBUG(5, ("rpc_write_send: data_to_write: %u\n", (unsigned int)size));
 180
 181         subreq = transport->write_send(state, ev, data, size, transport->priv);
 182         if (subreq == NULL) {
 183                 goto fail;
 184         }
 185         tevent_req_set_callback(subreq, rpc_write_done, req);
 186         return req;
 187  fail:
 188         TALLOC_FREE(req);
 189         return NULL;
 190 }
 191
 192 static void rpc_write_done(struct tevent_req *subreq)
 193 {
 194         struct tevent_req *req = tevent_req_callback_data(
 195                 subreq, struct tevent_req);
 196         struct rpc_write_state *state = tevent_req_data(
 197                 req, struct rpc_write_state);
 198         NTSTATUS status;
 199         ssize_t written;
 200
 201         status = state->transport->write_recv(subreq, &written);
 202         TALLOC_FREE(subreq);
 203         if (!NT_STATUS_IS_OK(status)) {
 204                 tevent_req_nterror(req, status);
 205                 return;
 206         }
 207
 208         state->num_written += written;
 209
 210         if (state->num_written == state->size) {
 211                 tevent_req_done(req);
 212                 return;
 213         }
 214
 215         subreq = state->transport->write_send(state, state->ev,
 216                                               state->data + state->num_written,
 217                                               state->size - state->num_written,
 218                                               state->transport->priv);
 219         if (tevent_req_nomem(subreq, req)) {
 220                 return;
 221         }
 222         tevent_req_set_callback(subreq, rpc_write_done, req);
 223 }
 224
 225 static NTSTATUS rpc_write_recv(struct tevent_req *req)
 226 {
 227         return tevent_req_simple_recv_ntstatus(req);
 228 }
 229
 230
 231 /****************************************************************************
 232  Try and get a PDU's worth of data from current_pdu. If not, then read more
 233  from the wire.
 234  ****************************************************************************/
 235
 236 struct get_complete_frag_state {
 237         struct event_context *ev;
 238         struct rpc_pipe_client *cli;
 239         uint16_t frag_len;
 240         DATA_BLOB *pdu;
 241 };
 242
 243 static void get_complete_frag_got_header(struct tevent_req *subreq);
 244 static void get_complete_frag_got_rest(struct tevent_req *subreq);
 245
 246 static struct tevent_req *get_complete_frag_send(TALLOC_CTX *mem_ctx,
 247                                                  struct event_context *ev,
 248                                                  struct rpc_pipe_client *cli,
 249                                                  DATA_BLOB *pdu)
 250 {
 251         struct tevent_req *req, *subreq;
 252         struct get_complete_frag_state *state;
 253         size_t received;
 254         NTSTATUS status;
 255
 256         req = tevent_req_create(mem_ctx, &state,
 257                                 struct get_complete_frag_state);
 258         if (req == NULL) {
 259                 return NULL;
 260         }
 261         state->ev = ev;
 262         state->cli = cli;
 263         state->frag_len = RPC_HEADER_LEN;
 264         state->pdu = pdu;
 265
 266         received = pdu->length;
 267         if (received < RPC_HEADER_LEN) {
 268                 if (!data_blob_realloc(mem_ctx, pdu, RPC_HEADER_LEN)) {
 269                         status = NT_STATUS_NO_MEMORY;
 270                         goto post_status;
 271                 }
 272                 subreq = rpc_read_send(state, state->ev,
 273                                         state->cli->transport,
 274                                         pdu->data + received,
 275                                         RPC_HEADER_LEN - received);
 276                 if (subreq == NULL) {
 277                         status = NT_STATUS_NO_MEMORY;
 278                         goto post_status;
 279                 }
 280                 tevent_req_set_callback(subreq, get_complete_frag_got_header,
 281                                         req);
 282                 return req;
 283         }
 284
 285         state->frag_len = dcerpc_get_frag_length(pdu);
 286
 287         /*
 288          * Ensure we have frag_len bytes of data.
 289          */
 290         if (received < state->frag_len) {
 291                 if (!data_blob_realloc(NULL, pdu, state->frag_len)) {
 292                         status = NT_STATUS_NO_MEMORY;
 293                         goto post_status;
 294                 }
 295                 subreq = rpc_read_send(state, state->ev,
 296                                         state->cli->transport,
 297                                         pdu->data + received,
 298                                         state->frag_len - received);
 299                 if (subreq == NULL) {
 300                         status = NT_STATUS_NO_MEMORY;
 301                         goto post_status;
 302                 }
 303                 tevent_req_set_callback(subreq, get_complete_frag_got_rest,
 304                                         req);
 305                 return req;
 306         }
 307
 308         status = NT_STATUS_OK;
 309  post_status:
 310         if (NT_STATUS_IS_OK(status)) {
 311                 tevent_req_done(req);
 312         } else {
 313                 tevent_req_nterror(req, status);
 314         }
 315         return tevent_req_post(req, ev);
 316 }
 317
 318 static void get_complete_frag_got_header(struct tevent_req *subreq)
 319 {
 320         struct tevent_req *req = tevent_req_callback_data(
 321                 subreq, struct tevent_req);
 322         struct get_complete_frag_state *state = tevent_req_data(
 323                 req, struct get_complete_frag_state);
 324         NTSTATUS status;
 325
 326         status = rpc_read_recv(subreq);
 327         TALLOC_FREE(subreq);
 328         if (!NT_STATUS_IS_OK(status)) {
 329                 tevent_req_nterror(req, status);
 330                 return;
 331         }
 332
 333         state->frag_len = dcerpc_get_frag_length(state->pdu);
 334
 335         if (!data_blob_realloc(NULL, state->pdu, state->frag_len)) {
 336                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 337                 return;
 338         }
 339
 340         /*
 341          * We're here in this piece of code because we've read exactly
 342          * RPC_HEADER_LEN bytes into state->pdu.
 343          */
 344
 345         subreq = rpc_read_send(state, state->ev, state->cli->transport,
 346                                 state->pdu->data + RPC_HEADER_LEN,
 347                                 state->frag_len - RPC_HEADER_LEN);
 348         if (tevent_req_nomem(subreq, req)) {
 349                 return;
 350         }
 351         tevent_req_set_callback(subreq, get_complete_frag_got_rest, req);
 352 }
 353
 354 static void get_complete_frag_got_rest(struct tevent_req *subreq)
 355 {
 356         struct tevent_req *req = tevent_req_callback_data(
 357                 subreq, struct tevent_req);
 358         NTSTATUS status;
 359
 360         status = rpc_read_recv(subreq);
 361         TALLOC_FREE(subreq);
 362         if (!NT_STATUS_IS_OK(status)) {
 363                 tevent_req_nterror(req, status);
 364                 return;
 365         }
 366         tevent_req_done(req);
 367 }
 368
 369 static NTSTATUS get_complete_frag_recv(struct tevent_req *req)
 370 {
 371         return tevent_req_simple_recv_ntstatus(req);
 372 }
 373
 374 /****************************************************************************
 375  Do basic authentication checks on an incoming pdu.
 376  ****************************************************************************/
 377
 378 static NTSTATUS cli_pipe_validate_current_pdu(TALLOC_CTX *mem_ctx,
 379                                                 struct rpc_pipe_client *cli,
 380                                                 struct ncacn_packet *pkt,
 381                                                 DATA_BLOB *pdu,
 382                                                 uint8_t expected_pkt_type,
 383                                                 DATA_BLOB *rdata,
 384                                                 DATA_BLOB *reply_pdu)
 385 {
 386         struct dcerpc_response *r;
 387         NTSTATUS ret = NT_STATUS_OK;
 388         size_t pad_len = 0;
 389
 390         /*
 391          * Point the return values at the real data including the RPC
 392          * header. Just in case the caller wants it.
 393          */
 394         *rdata = *pdu;
 395
 396         /* Ensure we have the correct type. */
 397         switch (pkt->ptype) {
 398         case DCERPC_PKT_ALTER_RESP:
 399         case DCERPC_PKT_BIND_ACK:
 400
 401                 /* Client code never receives this kind of packets */
 402                 break;
 403
 404
 405         case DCERPC_PKT_RESPONSE:
 406
 407                 r = &pkt->u.response;
 408
 409                 /* Here's where we deal with incoming sign/seal. */
 410                 ret = dcerpc_check_auth(cli->auth, pkt,
 411                                         &r->stub_and_verifier,
 412                                         DCERPC_RESPONSE_LENGTH,
 413                                         pdu, &pad_len);
 414                 if (!NT_STATUS_IS_OK(ret)) {
 415                         return ret;
 416                 }
 417
 418                 if (pkt->frag_length < DCERPC_RESPONSE_LENGTH + pad_len) {
 419                         return NT_STATUS_BUFFER_TOO_SMALL;
 420                 }
 421
 422                 /* Point the return values at the NDR data. */
 423                 rdata->data = r->stub_and_verifier.data;
 424
 425                 if (pkt->auth_length) {
 426                         /* We've already done integer wrap tests in
 427                          * dcerpc_check_auth(). */
 428                         rdata->length = r->stub_and_verifier.length
 429                                          - pad_len
 430                                          - DCERPC_AUTH_TRAILER_LENGTH
 431                                          - pkt->auth_length;
 432                 } else {
 433                         rdata->length = r->stub_and_verifier.length;
 434                 }
 435
 436                 DEBUG(10, ("Got pdu len %lu, data_len %lu, ss_len %u\n",
 437                            (long unsigned int)pdu->length,
 438                            (long unsigned int)rdata->length,
 439                            (unsigned int)pad_len));
 440
 441                 /*
 442                  * If this is the first reply, and the allocation hint is
 443                  * reasonable, try and set up the reply_pdu DATA_BLOB to the
 444                  * correct size.
 445                  */
 446
 447                 if ((reply_pdu->length == 0) &&
 448                     r->alloc_hint && (r->alloc_hint < 15*1024*1024)) {
 449                         if (!data_blob_realloc(mem_ctx, reply_pdu,
 450                                                         r->alloc_hint)) {
 451                                 DEBUG(0, ("reply alloc hint %d too "
 452                                           "large to allocate\n",
 453                                           (int)r->alloc_hint));
 454                                 return NT_STATUS_NO_MEMORY;
 455                         }
 456                 }
 457
 458                 break;
 459
 460         case DCERPC_PKT_BIND_NAK:
 461                 DEBUG(1, (__location__ ": Bind NACK received from %s!\n",
 462                           rpccli_pipe_txt(talloc_tos(), cli)));
 463                 /* Use this for now... */
 464                 return NT_STATUS_NETWORK_ACCESS_DENIED;
 465
 466         case DCERPC_PKT_FAULT:
 467
 468                 DEBUG(1, (__location__ ": RPC fault code %s received "
 469                           "from %s!\n",
 470                           dcerpc_errstr(talloc_tos(),
 471                           pkt->u.fault.status),
 472                           rpccli_pipe_txt(talloc_tos(), cli)));
 473
 474                 return dcerpc_fault_to_nt_status(pkt->u.fault.status);
 475
 476         default:
 477                 DEBUG(0, (__location__ "Unknown packet type %u received "
 478                           "from %s!\n",
 479                           (unsigned int)pkt->ptype,
 480                           rpccli_pipe_txt(talloc_tos(), cli)));
 481                 return NT_STATUS_INVALID_INFO_CLASS;
 482         }
 483
 484         if (pkt->ptype != expected_pkt_type) {
 485                 DEBUG(3, (__location__ ": Connection to %s got an unexpected "
 486                           "RPC packet type - %u, not %u\n",
 487                           rpccli_pipe_txt(talloc_tos(), cli),
 488                           pkt->ptype, expected_pkt_type));
 489                 return NT_STATUS_INVALID_INFO_CLASS;
 490         }
 491
 492         /* Do this just before return - we don't want to modify any rpc header
 493            data before now as we may have needed to do cryptographic actions on
 494            it before. */
 495
 496         if ((pkt->ptype == DCERPC_PKT_BIND_ACK) &&
 497             !(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) {
 498                 DEBUG(5, (__location__ ": bug in server (AS/U?), setting "
 499                           "fragment first/last ON.\n"));
 500                 pkt->pfc_flags |= DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
 501         }
 502
 503         return NT_STATUS_OK;
 504 }
 505
 506 /****************************************************************************
 507  Call a remote api on an arbitrary pipe.  takes param, data and setup buffers.
 508 ****************************************************************************/
 509
 510 struct cli_api_pipe_state {
 511         struct event_context *ev;
 512         struct rpc_cli_transport *transport;
 513         uint8_t *rdata;
 514         uint32_t rdata_len;
 515 };
 516
 517 static void cli_api_pipe_trans_done(struct tevent_req *subreq);
 518 static void cli_api_pipe_write_done(struct tevent_req *subreq);
 519 static void cli_api_pipe_read_done(struct tevent_req *subreq);
 520
 521 static struct tevent_req *cli_api_pipe_send(TALLOC_CTX *mem_ctx,
 522                                             struct event_context *ev,
 523                                             struct rpc_cli_transport *transport,
 524                                             uint8_t *data, size_t data_len,
 525                                             uint32_t max_rdata_len)
 526 {
 527         struct tevent_req *req, *subreq;
 528         struct cli_api_pipe_state *state;
 529         NTSTATUS status;
 530
 531         req = tevent_req_create(mem_ctx, &state, struct cli_api_pipe_state);
 532         if (req == NULL) {
 533                 return NULL;
 534         }
 535         state->ev = ev;
 536         state->transport = transport;
 537
 538         if (max_rdata_len < RPC_HEADER_LEN) {
 539                 /*
 540                  * For a RPC reply we always need at least RPC_HEADER_LEN
 541                  * bytes. We check this here because we will receive
 542                  * RPC_HEADER_LEN bytes in cli_trans_sock_send_done.
 543                  */
 544                 status = NT_STATUS_INVALID_PARAMETER;
 545                 goto post_status;
 546         }
 547
 548         if (transport->trans_send != NULL) {
 549                 subreq = transport->trans_send(state, ev, data, data_len,
 550                                                max_rdata_len, transport->priv);
 551                 if (subreq == NULL) {
 552                         goto fail;
 553                 }
 554                 tevent_req_set_callback(subreq, cli_api_pipe_trans_done, req);
 555                 return req;
 556         }
 557
 558         /*
 559          * If the transport does not provide a "trans" routine, i.e. for
 560          * example the ncacn_ip_tcp transport, do the write/read step here.
 561          */
 562
 563         subreq = rpc_write_send(state, ev, transport, data, data_len);
 564         if (subreq == NULL) {
 565                 goto fail;
 566         }
 567         tevent_req_set_callback(subreq, cli_api_pipe_write_done, req);
 568         return req;
 569
 570  post_status:
 571         tevent_req_nterror(req, status);
 572         return tevent_req_post(req, ev);
 573  fail:
 574         TALLOC_FREE(req);
 575         return NULL;
 576 }
 577
 578 static void cli_api_pipe_trans_done(struct tevent_req *subreq)
 579 {
 580         struct tevent_req *req = tevent_req_callback_data(
 581                 subreq, struct tevent_req);
 582         struct cli_api_pipe_state *state = tevent_req_data(
 583                 req, struct cli_api_pipe_state);
 584         NTSTATUS status;
 585
 586         status = state->transport->trans_recv(subreq, state, &state->rdata,
 587                                               &state->rdata_len);
 588         TALLOC_FREE(subreq);
 589         if (!NT_STATUS_IS_OK(status)) {
 590                 tevent_req_nterror(req, status);
 591                 return;
 592         }
 593         tevent_req_done(req);
 594 }
 595
 596 static void cli_api_pipe_write_done(struct tevent_req *subreq)
 597 {
 598         struct tevent_req *req = tevent_req_callback_data(
 599                 subreq, struct tevent_req);
 600         struct cli_api_pipe_state *state = tevent_req_data(
 601                 req, struct cli_api_pipe_state);
 602         NTSTATUS status;
 603
 604         status = rpc_write_recv(subreq);
 605         TALLOC_FREE(subreq);
 606         if (!NT_STATUS_IS_OK(status)) {
 607                 tevent_req_nterror(req, status);
 608                 return;
 609         }
 610
 611         state->rdata = talloc_array(state, uint8_t, RPC_HEADER_LEN);
 612         if (tevent_req_nomem(state->rdata, req)) {
 613                 return;
 614         }
 615
 616         /*
 617          * We don't need to use rpc_read_send here, the upper layer will cope
 618          * with a short read, transport->trans_send could also return less
 619          * than state->max_rdata_len.
 620          */
 621         subreq = state->transport->read_send(state, state->ev, state->rdata,
 622                                              RPC_HEADER_LEN,
 623                                              state->transport->priv);
 624         if (tevent_req_nomem(subreq, req)) {
 625                 return;
 626         }
 627         tevent_req_set_callback(subreq, cli_api_pipe_read_done, req);
 628 }
 629
 630 static void cli_api_pipe_read_done(struct tevent_req *subreq)
 631 {
 632         struct tevent_req *req = tevent_req_callback_data(
 633                 subreq, struct tevent_req);
 634         struct cli_api_pipe_state *state = tevent_req_data(
 635                 req, struct cli_api_pipe_state);
 636         NTSTATUS status;
 637         ssize_t received;
 638
 639         status = state->transport->read_recv(subreq, &received);
 640         TALLOC_FREE(subreq);
 641         if (!NT_STATUS_IS_OK(status)) {
 642                 tevent_req_nterror(req, status);
 643                 return;
 644         }
 645         state->rdata_len = received;
 646         tevent_req_done(req);
 647 }
 648
 649 static NTSTATUS cli_api_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 650                                   uint8_t **prdata, uint32_t *prdata_len)
 651 {
 652         struct cli_api_pipe_state *state = tevent_req_data(
 653                 req, struct cli_api_pipe_state);
 654         NTSTATUS status;
 655
 656         if (tevent_req_is_nterror(req, &status)) {
 657                 return status;
 658         }
 659
 660         *prdata = talloc_move(mem_ctx, &state->rdata);
 661         *prdata_len = state->rdata_len;
 662         return NT_STATUS_OK;
 663 }
 664
 665 /****************************************************************************
 666  Send data on an rpc pipe via trans. The data must be the last
 667  pdu fragment of an NDR data stream.
 668
 669  Receive response data from an rpc pipe, which may be large...
 670
 671  Read the first fragment: unfortunately have to use SMBtrans for the first
 672  bit, then SMBreadX for subsequent bits.
 673
 674  If first fragment received also wasn't the last fragment, continue
 675  getting fragments until we _do_ receive the last fragment.
 676
 677  Request/Response PDU's look like the following...
 678
 679  |<------------------PDU len----------------------------------------------->|
 680  |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|
 681
 682  +------------+-----------------+-------------+---------------+-------------+
 683  | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR      | AUTH DATA   |
 684  +------------+-----------------+-------------+---------------+-------------+
 685
 686  Where the presence of the AUTH_HDR and AUTH DATA are dependent on the
 687  signing & sealing being negotiated.
 688
 689  ****************************************************************************/
 690
 691 struct rpc_api_pipe_state {
 692         struct event_context *ev;
 693         struct rpc_pipe_client *cli;
 694         uint8_t expected_pkt_type;
 695
 696         DATA_BLOB incoming_frag;
 697         struct ncacn_packet *pkt;
 698
 699         /* Incoming reply */
 700         DATA_BLOB reply_pdu;
 701         size_t reply_pdu_offset;
 702         uint8_t endianess;
 703 };
 704
 705 static void rpc_api_pipe_trans_done(struct tevent_req *subreq);
 706 static void rpc_api_pipe_got_pdu(struct tevent_req *subreq);
 707 static void rpc_api_pipe_auth3_done(struct tevent_req *subreq);
 708
 709 static struct tevent_req *rpc_api_pipe_send(TALLOC_CTX *mem_ctx,
 710                                             struct event_context *ev,
 711                                             struct rpc_pipe_client *cli,
 712                                             DATA_BLOB *data, /* Outgoing PDU */
 713                                             uint8_t expected_pkt_type)
 714 {
 715         struct tevent_req *req, *subreq;
 716         struct rpc_api_pipe_state *state;
 717         uint16_t max_recv_frag;
 718         NTSTATUS status;
 719
 720         req = tevent_req_create(mem_ctx, &state, struct rpc_api_pipe_state);
 721         if (req == NULL) {
 722                 return NULL;
 723         }
 724         state->ev = ev;
 725         state->cli = cli;
 726         state->expected_pkt_type = expected_pkt_type;
 727         state->incoming_frag = data_blob_null;
 728         state->reply_pdu = data_blob_null;
 729         state->reply_pdu_offset = 0;
 730         state->endianess = DCERPC_DREP_LE;
 731
 732         /*
 733          * Ensure we're not sending too much.
 734          */
 735         if (data->length > cli->max_xmit_frag) {
 736                 status = NT_STATUS_INVALID_PARAMETER;
 737                 goto post_status;
 738         }
 739
 740         DEBUG(5,("rpc_api_pipe: %s\n", rpccli_pipe_txt(talloc_tos(), cli)));
 741
 742         if (state->expected_pkt_type == DCERPC_PKT_AUTH3) {
 743                 subreq = rpc_write_send(state, ev, cli->transport,
 744                                         data->data, data->length);
 745                 if (subreq == NULL) {
 746                         goto fail;
 747                 }
 748                 tevent_req_set_callback(subreq, rpc_api_pipe_auth3_done, req);
 749                 return req;
 750         }
 751
 752         /* get the header first, then fetch the rest once we have
 753          * the frag_length available */
 754         max_recv_frag = RPC_HEADER_LEN;
 755
 756         subreq = cli_api_pipe_send(state, ev, cli->transport,
 757                                    data->data, data->length, max_recv_frag);
 758         if (subreq == NULL) {
 759                 goto fail;
 760         }
 761         tevent_req_set_callback(subreq, rpc_api_pipe_trans_done, req);
 762         return req;
 763
 764  post_status:
 765         tevent_req_nterror(req, status);
 766         return tevent_req_post(req, ev);
 767  fail:
 768         TALLOC_FREE(req);
 769         return NULL;
 770 }
 771
 772 static void rpc_api_pipe_auth3_done(struct tevent_req *subreq)
 773 {
 774         struct tevent_req *req =
 775                 tevent_req_callback_data(subreq,
 776                 struct tevent_req);
 777         NTSTATUS status;
 778
 779         status = rpc_write_recv(subreq);
 780         TALLOC_FREE(subreq);
 781         if (!NT_STATUS_IS_OK(status)) {
 782                 tevent_req_nterror(req, status);
 783                 return;
 784         }
 785
 786         tevent_req_done(req);
 787 }
 788
 789 static void rpc_api_pipe_trans_done(struct tevent_req *subreq)
 790 {
 791         struct tevent_req *req = tevent_req_callback_data(
 792                 subreq, struct tevent_req);
 793         struct rpc_api_pipe_state *state = tevent_req_data(
 794                 req, struct rpc_api_pipe_state);
 795         NTSTATUS status;
 796         uint8_t *rdata = NULL;
 797         uint32_t rdata_len = 0;
 798
 799         status = cli_api_pipe_recv(subreq, state, &rdata, &rdata_len);
 800         TALLOC_FREE(subreq);
 801         if (!NT_STATUS_IS_OK(status)) {
 802                 DEBUG(5, ("cli_api_pipe failed: %s\n", nt_errstr(status)));
 803                 tevent_req_nterror(req, status);
 804                 return;
 805         }
 806
 807         if (rdata == NULL) {
 808                 DEBUG(3,("rpc_api_pipe: %s failed to return data.\n",
 809                          rpccli_pipe_txt(talloc_tos(), state->cli)));
 810                 tevent_req_done(req);
 811                 return;
 812         }
 813
 814         /*
 815          * Move data on state->incoming_frag.
 816          */
 817         state->incoming_frag.data = talloc_move(state, &rdata);
 818         state->incoming_frag.length = rdata_len;
 819         if (!state->incoming_frag.data) {
 820                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 821                 return;
 822         }
 823
 824         /* Ensure we have enough data for a pdu. */
 825         subreq = get_complete_frag_send(state, state->ev, state->cli,
 826                                         &state->incoming_frag);
 827         if (tevent_req_nomem(subreq, req)) {
 828                 return;
 829         }
 830         tevent_req_set_callback(subreq, rpc_api_pipe_got_pdu, req);
 831 }
 832
 833 static void rpc_api_pipe_got_pdu(struct tevent_req *subreq)
 834 {
 835         struct tevent_req *req = tevent_req_callback_data(
 836                 subreq, struct tevent_req);
 837         struct rpc_api_pipe_state *state = tevent_req_data(
 838                 req, struct rpc_api_pipe_state);
 839         NTSTATUS status;
 840         DATA_BLOB rdata = data_blob_null;
 841
 842         status = get_complete_frag_recv(subreq);
 843         TALLOC_FREE(subreq);
 844         if (!NT_STATUS_IS_OK(status)) {
 845                 DEBUG(5, ("get_complete_frag failed: %s\n",
 846                           nt_errstr(status)));
 847                 tevent_req_nterror(req, status);
 848                 return;
 849         }
 850
 851         state->pkt = talloc(state, struct ncacn_packet);
 852         if (!state->pkt) {
 853                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 854                 return;
 855         }
 856
 857         status = dcerpc_pull_ncacn_packet(state->pkt,
 858                                           &state->incoming_frag,
 859                                           state->pkt,
 860                                           !state->endianess);
 861         if (!NT_STATUS_IS_OK(status)) {
 862                 tevent_req_nterror(req, status);
 863                 return;
 864         }
 865
 866         if (state->incoming_frag.length != state->pkt->frag_length) {
 867                 DEBUG(5, ("Incorrect pdu length %u, expected %u\n",
 868                           (unsigned int)state->incoming_frag.length,
 869                           (unsigned int)state->pkt->frag_length));
 870                 tevent_req_nterror(req,  NT_STATUS_INVALID_PARAMETER);
 871                 return;
 872         }
 873
 874         status = cli_pipe_validate_current_pdu(state,
 875                                                 state->cli, state->pkt,
 876                                                 &state->incoming_frag,
 877                                                 state->expected_pkt_type,
 878                                                 &rdata,
 879                                                 &state->reply_pdu);
 880
 881         DEBUG(10,("rpc_api_pipe: got frag len of %u at offset %u: %s\n",
 882                   (unsigned)state->incoming_frag.length,
 883                   (unsigned)state->reply_pdu_offset,
 884                   nt_errstr(status)));
 885
 886         if (!NT_STATUS_IS_OK(status)) {
 887                 tevent_req_nterror(req, status);
 888                 return;
 889         }
 890
 891         if ((state->pkt->pfc_flags & DCERPC_PFC_FLAG_FIRST)
 892             && (state->pkt->drep[0] != DCERPC_DREP_LE)) {
 893                 /*
 894                  * Set the data type correctly for big-endian data on the
 895                  * first packet.
 896                  */
 897                 DEBUG(10,("rpc_api_pipe: On %s PDU data format is "
 898                           "big-endian.\n",
 899                           rpccli_pipe_txt(talloc_tos(), state->cli)));
 900                 state->endianess = 0x00; /* BIG ENDIAN */
 901         }
 902         /*
 903          * Check endianness on subsequent packets.
 904          */
 905         if (state->endianess != state->pkt->drep[0]) {
 906                 DEBUG(0,("rpc_api_pipe: Error : Endianness changed from %s to "
 907                          "%s\n",
 908                          state->endianess?"little":"big",
 909                          state->pkt->drep[0]?"little":"big"));
 910                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 911                 return;
 912         }
 913
 914         /* Now copy the data portion out of the pdu into rbuf. */
 915         if (state->reply_pdu.length < state->reply_pdu_offset + rdata.length) {
 916                 if (!data_blob_realloc(NULL, &state->reply_pdu,
 917                                 state->reply_pdu_offset + rdata.length)) {
 918                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 919                         return;
 920                 }
 921         }
 922
 923         memcpy(state->reply_pdu.data + state->reply_pdu_offset,
 924                 rdata.data, rdata.length);
 925         state->reply_pdu_offset += rdata.length;
 926
 927         /* reset state->incoming_frag, there is no need to free it,
 928          * it will be reallocated to the right size the next time
 929          * it is used */
 930         state->incoming_frag.length = 0;
 931
 932         if (state->pkt->pfc_flags & DCERPC_PFC_FLAG_LAST) {
 933                 /* make sure the pdu length is right now that we
 934                  * have all the data available (alloc hint may
 935                  * have allocated more than was actually used) */
 936                 state->reply_pdu.length = state->reply_pdu_offset;
 937                 DEBUG(10,("rpc_api_pipe: %s returned %u bytes.\n",
 938                           rpccli_pipe_txt(talloc_tos(), state->cli),
 939                           (unsigned)state->reply_pdu.length));
 940                 tevent_req_done(req);
 941                 return;
 942         }
 943
 944         subreq = get_complete_frag_send(state, state->ev, state->cli,
 945                                         &state->incoming_frag);
 946         if (tevent_req_nomem(subreq, req)) {
 947                 return;
 948         }
 949         tevent_req_set_callback(subreq, rpc_api_pipe_got_pdu, req);
 950 }
 951
 952 static NTSTATUS rpc_api_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 953                                   struct ncacn_packet **pkt,
 954                                   DATA_BLOB *reply_pdu)
 955 {
 956         struct rpc_api_pipe_state *state = tevent_req_data(
 957                 req, struct rpc_api_pipe_state);
 958         NTSTATUS status;
 959
 960         if (tevent_req_is_nterror(req, &status)) {
 961                 return status;
 962         }
 963
 964         /* return data to caller and assign it ownership of memory */
 965         if (reply_pdu) {
 966                 reply_pdu->data = talloc_move(mem_ctx, &state->reply_pdu.data);
 967                 reply_pdu->length = state->reply_pdu.length;
 968                 state->reply_pdu.length = 0;
 969         } else {
 970                 data_blob_free(&state->reply_pdu);
 971         }
 972
 973         if (pkt) {
 974                 *pkt = talloc_steal(mem_ctx, state->pkt);
 975         }
 976
 977         return NT_STATUS_OK;
 978 }
 979
 980 /*******************************************************************
 981  Creates spnego auth bind.
 982  ********************************************************************/
 983
 984 static NTSTATUS create_spnego_auth_bind_req(TALLOC_CTX *mem_ctx,
 985                                             struct pipe_auth_data *auth,
 986                                             DATA_BLOB *auth_token)
 987 {
 988         struct spnego_context *spnego_ctx;
 989         DATA_BLOB in_token = data_blob_null;
 990         NTSTATUS status;
 991
 992         spnego_ctx = talloc_get_type_abort(auth->auth_ctx,
 993                                            struct spnego_context);
 994
 995         /* Negotiate the initial auth token */
 996         status = spnego_get_client_auth_token(mem_ctx, spnego_ctx,
 997                                               &in_token, auth_token);
 998         if (!NT_STATUS_IS_OK(status)) {
 999                 return status;
1000         }
1001
1002         DEBUG(5, ("Created GSS Authentication Token:\n"));
1003         dump_data(5, auth_token->data, auth_token->length);
1004
1005         return NT_STATUS_OK;
1006 }
1007
1008 /*******************************************************************
1009  Creates krb5 auth bind.
1010  ********************************************************************/
1011
1012 static NTSTATUS create_gssapi_auth_bind_req(TALLOC_CTX *mem_ctx,
1013                                             struct pipe_auth_data *auth,
1014                                             DATA_BLOB *auth_token)
1015 {
1016         struct gse_context *gse_ctx;
1017         DATA_BLOB in_token = data_blob_null;
1018         NTSTATUS status;
1019
1020         gse_ctx = talloc_get_type_abort(auth->auth_ctx,
1021                                         struct gse_context);
1022
1023         /* Negotiate the initial auth token */
1024         status = gse_get_client_auth_token(mem_ctx, gse_ctx,
1025                                            &in_token,
1026                                            auth_token);
1027         if (!NT_STATUS_IS_OK(status)) {
1028                 return status;
1029         }
1030
1031         DEBUG(5, ("Created GSS Authentication Token:\n"));
1032         dump_data(5, auth_token->data, auth_token->length);
1033
1034         return NT_STATUS_OK;
1035 }
1036
1037 /*******************************************************************
1038  Creates NTLMSSP auth bind.
1039  ********************************************************************/
1040
1041 static NTSTATUS create_generic_auth_rpc_bind_req(struct rpc_pipe_client *cli,
1042                                                  TALLOC_CTX *mem_ctx,
1043                                                  DATA_BLOB *auth_token)
1044 {
1045         struct gensec_security *gensec_security;
1046         DATA_BLOB null_blob = data_blob_null;
1047         NTSTATUS status;
1048
1049         gensec_security = talloc_get_type_abort(cli->auth->auth_ctx,
1050                                         struct gensec_security);
1051
1052         DEBUG(5, ("create_generic_auth_rpc_bind_req: Processing NTLMSSP Negotiate\n"));
1053         status = gensec_update(gensec_security, mem_ctx, NULL, null_blob, auth_token);
1054
1055         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1056                 data_blob_free(auth_token);
1057                 return status;
1058         }
1059
1060         return NT_STATUS_OK;
1061 }
1062
1063 /*******************************************************************
1064  Creates schannel auth bind.
1065  ********************************************************************/
1066
1067 static NTSTATUS create_schannel_auth_rpc_bind_req(struct rpc_pipe_client *cli,
1068                                                   DATA_BLOB *auth_token)
1069 {
1070         NTSTATUS status;
1071         struct NL_AUTH_MESSAGE r;
1072
1073         /* Use lp_workgroup() if domain not specified */
1074
1075         if (!cli->auth->domain || !cli->auth->domain[0]) {
1076                 cli->auth->domain = talloc_strdup(cli, lp_workgroup());
1077                 if (cli->auth->domain == NULL) {
1078                         return NT_STATUS_NO_MEMORY;
1079                 }
1080         }
1081
1082         /*
1083          * Now marshall the data into the auth parse_struct.
1084          */
1085
1086         r.MessageType                   = NL_NEGOTIATE_REQUEST;
1087         r.Flags                         = NL_FLAG_OEM_NETBIOS_DOMAIN_NAME |
1088                                           NL_FLAG_OEM_NETBIOS_COMPUTER_NAME;
1089         r.oem_netbios_domain.a          = cli->auth->domain;
1090         r.oem_netbios_computer.a        = lp_netbios_name();
1091
1092         status = dcerpc_push_schannel_bind(cli, &r, auth_token);
1093         if (!NT_STATUS_IS_OK(status)) {
1094                 return status;
1095         }
1096
1097         return NT_STATUS_OK;
1098 }
1099
1100 /*******************************************************************
1101  Creates the internals of a DCE/RPC bind request or alter context PDU.
1102  ********************************************************************/
1103
1104 static NTSTATUS create_bind_or_alt_ctx_internal(TALLOC_CTX *mem_ctx,
1105                                                 enum dcerpc_pkt_type ptype,
1106                                                 uint32 rpc_call_id,
1107                                                 const struct ndr_syntax_id *abstract,
1108                                                 const struct ndr_syntax_id *transfer,
1109                                                 const DATA_BLOB *auth_info,
1110                                                 DATA_BLOB *blob)
1111 {
1112         uint16 auth_len = auth_info->length;
1113         NTSTATUS status;
1114         union dcerpc_payload u;
1115         struct dcerpc_ctx_list ctx_list;
1116
1117         if (auth_len) {
1118                 auth_len -= DCERPC_AUTH_TRAILER_LENGTH;
1119         }
1120
1121         ctx_list.context_id = 0;
1122         ctx_list.num_transfer_syntaxes = 1;
1123         ctx_list.abstract_syntax = *abstract;
1124         ctx_list.transfer_syntaxes = (struct ndr_syntax_id *)discard_const(transfer);
1125
1126         u.bind.max_xmit_frag    = RPC_MAX_PDU_FRAG_LEN;
1127         u.bind.max_recv_frag    = RPC_MAX_PDU_FRAG_LEN;
1128         u.bind.assoc_group_id   = 0x0;
1129         u.bind.num_contexts     = 1;
1130         u.bind.ctx_list         = &ctx_list;
1131         u.bind.auth_info        = *auth_info;
1132
1133         status = dcerpc_push_ncacn_packet(mem_ctx,
1134                                           ptype,
1135                                           DCERPC_PFC_FLAG_FIRST |
1136                                           DCERPC_PFC_FLAG_LAST,
1137                                           auth_len,
1138                                           rpc_call_id,
1139                                           &u,
1140                                           blob);
1141         if (!NT_STATUS_IS_OK(status)) {
1142                 DEBUG(0, ("Failed to marshall bind/alter ncacn_packet.\n"));
1143                 return status;
1144         }
1145
1146         return NT_STATUS_OK;
1147 }
1148
1149 /*******************************************************************
1150  Creates a DCE/RPC bind request.
1151  ********************************************************************/
1152
1153 static NTSTATUS create_rpc_bind_req(TALLOC_CTX *mem_ctx,
1154                                     struct rpc_pipe_client *cli,
1155                                     struct pipe_auth_data *auth,
1156                                     uint32 rpc_call_id,
1157                                     const struct ndr_syntax_id *abstract,
1158                                     const struct ndr_syntax_id *transfer,
1159                                     DATA_BLOB *rpc_out)
1160 {
1161         DATA_BLOB auth_token = data_blob_null;
1162         DATA_BLOB auth_info = data_blob_null;
1163         NTSTATUS ret = NT_STATUS_OK;
1164
1165         switch (auth->auth_type) {
1166         case DCERPC_AUTH_TYPE_SCHANNEL:
1167                 ret = create_schannel_auth_rpc_bind_req(cli, &auth_token);
1168                 if (!NT_STATUS_IS_OK(ret)) {
1169                         return ret;
1170                 }
1171                 break;
1172
1173         case DCERPC_AUTH_TYPE_NTLMSSP:
1174                 ret = create_generic_auth_rpc_bind_req(cli, mem_ctx, &auth_token);
1175                 if (!NT_STATUS_IS_OK(ret)) {
1176                         return ret;
1177                 }
1178                 break;
1179
1180         case DCERPC_AUTH_TYPE_SPNEGO:
1181                 ret = create_spnego_auth_bind_req(cli, auth, &auth_token);
1182                 if (!NT_STATUS_IS_OK(ret)) {
1183                         return ret;
1184                 }
1185                 break;
1186
1187         case DCERPC_AUTH_TYPE_KRB5:
1188                 ret = create_gssapi_auth_bind_req(mem_ctx, auth, &auth_token);
1189                 if (!NT_STATUS_IS_OK(ret)) {
1190                         return ret;
1191                 }
1192                 break;
1193
1194         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1195                 auth_token = data_blob_talloc(mem_ctx,
1196                                               "NCALRPC_AUTH_TOKEN",
1197                                               18);
1198                 break;
1199
1200         case DCERPC_AUTH_TYPE_NONE:
1201                 break;
1202
1203         default:
1204                 /* "Can't" happen. */
1205                 return NT_STATUS_INVALID_INFO_CLASS;
1206         }
1207
1208         if (auth_token.length != 0) {
1209                 ret = dcerpc_push_dcerpc_auth(cli,
1210                                                 auth->auth_type,
1211                                                 auth->auth_level,
1212                                                 0, /* auth_pad_length */
1213                                                 1, /* auth_context_id */
1214                                                 &auth_token,
1215                                                 &auth_info);
1216                 if (!NT_STATUS_IS_OK(ret)) {
1217                         return ret;
1218                 }
1219                 data_blob_free(&auth_token);
1220         }
1221
1222         ret = create_bind_or_alt_ctx_internal(mem_ctx,
1223                                               DCERPC_PKT_BIND,
1224                                               rpc_call_id,
1225                                               abstract,
1226                                               transfer,
1227                                               &auth_info,
1228                                               rpc_out);
1229         return ret;
1230 }
1231
1232 /*******************************************************************
1233  External interface.
1234  Does an rpc request on a pipe. Incoming data is NDR encoded in in_data.
1235  Reply is NDR encoded in out_data. Splits the data stream into RPC PDU's
1236  and deals with signing/sealing details.
1237  ********************************************************************/
1238
1239 struct rpc_api_pipe_req_state {
1240         struct event_context *ev;
1241         struct rpc_pipe_client *cli;
1242         uint8_t op_num;
1243         uint32_t call_id;
1244         DATA_BLOB *req_data;
1245         uint32_t req_data_sent;
1246         DATA_BLOB rpc_out;
1247         DATA_BLOB reply_pdu;
1248 };
1249
1250 static void rpc_api_pipe_req_write_done(struct tevent_req *subreq);
1251 static void rpc_api_pipe_req_done(struct tevent_req *subreq);
1252 static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
1253                                   bool *is_last_frag);
1254
1255 struct tevent_req *rpc_api_pipe_req_send(TALLOC_CTX *mem_ctx,
1256                                          struct event_context *ev,
1257                                          struct rpc_pipe_client *cli,
1258                                          uint8_t op_num,
1259                                          DATA_BLOB *req_data)
1260 {
1261         struct tevent_req *req, *subreq;
1262         struct rpc_api_pipe_req_state *state;
1263         NTSTATUS status;
1264         bool is_last_frag;
1265
1266         req = tevent_req_create(mem_ctx, &state,
1267                                 struct rpc_api_pipe_req_state);
1268         if (req == NULL) {
1269                 return NULL;
1270         }
1271         state->ev = ev;
1272         state->cli = cli;
1273         state->op_num = op_num;
1274         state->req_data = req_data;
1275         state->req_data_sent = 0;
1276         state->call_id = get_rpc_call_id();
1277         state->reply_pdu = data_blob_null;
1278         state->rpc_out = data_blob_null;
1279
1280         if (cli->max_xmit_frag < DCERPC_REQUEST_LENGTH
1281                                         + RPC_MAX_SIGN_SIZE) {
1282                 /* Server is screwed up ! */
1283                 status = NT_STATUS_INVALID_PARAMETER;
1284                 goto post_status;
1285         }
1286
1287         status = prepare_next_frag(state, &is_last_frag);
1288         if (!NT_STATUS_IS_OK(status)) {
1289                 goto post_status;
1290         }
1291
1292         if (is_last_frag) {
1293                 subreq = rpc_api_pipe_send(state, ev, state->cli,
1294                                            &state->rpc_out,
1295                                            DCERPC_PKT_RESPONSE);
1296                 if (subreq == NULL) {
1297                         goto fail;
1298                 }
1299                 tevent_req_set_callback(subreq, rpc_api_pipe_req_done, req);
1300         } else {
1301                 subreq = rpc_write_send(state, ev, cli->transport,
1302                                         state->rpc_out.data,
1303                                         state->rpc_out.length);
1304                 if (subreq == NULL) {
1305                         goto fail;
1306                 }
1307                 tevent_req_set_callback(subreq, rpc_api_pipe_req_write_done,
1308                                         req);
1309         }
1310         return req;
1311
1312  post_status:
1313         tevent_req_nterror(req, status);
1314         return tevent_req_post(req, ev);
1315  fail:
1316         TALLOC_FREE(req);
1317         return NULL;
1318 }
1319
1320 static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
1321                                   bool *is_last_frag)
1322 {
1323         size_t data_sent_thistime;
1324         size_t auth_len;
1325         size_t frag_len;
1326         uint8_t flags = 0;
1327         size_t pad_len;
1328         size_t data_left;
1329         NTSTATUS status;
1330         union dcerpc_payload u;
1331
1332         data_left = state->req_data->length - state->req_data_sent;
1333
1334         status = dcerpc_guess_sizes(state->cli->auth,
1335                                     DCERPC_REQUEST_LENGTH, data_left,
1336                                     state->cli->max_xmit_frag,
1337                                     CLIENT_NDR_PADDING_SIZE,
1338                                     &data_sent_thistime,
1339                                     &frag_len, &auth_len, &pad_len);
1340         if (!NT_STATUS_IS_OK(status)) {
1341                 return status;
1342         }
1343
1344         if (state->req_data_sent == 0) {
1345                 flags = DCERPC_PFC_FLAG_FIRST;
1346         }
1347
1348         if (data_sent_thistime == data_left) {
1349                 flags |= DCERPC_PFC_FLAG_LAST;
1350         }
1351
1352         data_blob_free(&state->rpc_out);
1353
1354         ZERO_STRUCT(u.request);
1355
1356         u.request.alloc_hint    = state->req_data->length;
1357         u.request.context_id    = 0;
1358         u.request.opnum         = state->op_num;
1359
1360         status = dcerpc_push_ncacn_packet(state,
1361                                           DCERPC_PKT_REQUEST,
1362                                           flags,
1363                                           auth_len,
1364                                           state->call_id,
1365                                           &u,
1366                                           &state->rpc_out);
1367         if (!NT_STATUS_IS_OK(status)) {
1368                 return status;
1369         }
1370
1371         /* explicitly set frag_len here as dcerpc_push_ncacn_packet() can't
1372          * compute it right for requests because the auth trailer is missing
1373          * at this stage */
1374         dcerpc_set_frag_length(&state->rpc_out, frag_len);
1375
1376         /* Copy in the data. */
1377         if (!data_blob_append(NULL, &state->rpc_out,
1378                                 state->req_data->data + state->req_data_sent,
1379                                 data_sent_thistime)) {
1380                 return NT_STATUS_NO_MEMORY;
1381         }
1382
1383         switch (state->cli->auth->auth_level) {
1384         case DCERPC_AUTH_LEVEL_NONE:
1385         case DCERPC_AUTH_LEVEL_CONNECT:
1386         case DCERPC_AUTH_LEVEL_PACKET:
1387                 break;
1388         case DCERPC_AUTH_LEVEL_INTEGRITY:
1389         case DCERPC_AUTH_LEVEL_PRIVACY:
1390                 status = dcerpc_add_auth_footer(state->cli->auth, pad_len,
1391                                                 &state->rpc_out);
1392                 if (!NT_STATUS_IS_OK(status)) {
1393                         return status;
1394                 }
1395                 break;
1396         default:
1397                 return NT_STATUS_INVALID_PARAMETER;
1398         }
1399
1400         state->req_data_sent += data_sent_thistime;
1401         *is_last_frag = ((flags & DCERPC_PFC_FLAG_LAST) != 0);
1402
1403         return status;
1404 }
1405
1406 static void rpc_api_pipe_req_write_done(struct tevent_req *subreq)
1407 {
1408         struct tevent_req *req = tevent_req_callback_data(
1409                 subreq, struct tevent_req);
1410         struct rpc_api_pipe_req_state *state = tevent_req_data(
1411                 req, struct rpc_api_pipe_req_state);
1412         NTSTATUS status;
1413         bool is_last_frag;
1414
1415         status = rpc_write_recv(subreq);
1416         TALLOC_FREE(subreq);
1417         if (!NT_STATUS_IS_OK(status)) {
1418                 tevent_req_nterror(req, status);
1419                 return;
1420         }
1421
1422         status = prepare_next_frag(state, &is_last_frag);
1423         if (!NT_STATUS_IS_OK(status)) {
1424                 tevent_req_nterror(req, status);
1425                 return;
1426         }
1427
1428         if (is_last_frag) {
1429                 subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1430                                            &state->rpc_out,
1431                                            DCERPC_PKT_RESPONSE);
1432                 if (tevent_req_nomem(subreq, req)) {
1433                         return;
1434                 }
1435                 tevent_req_set_callback(subreq, rpc_api_pipe_req_done, req);
1436         } else {
1437                 subreq = rpc_write_send(state, state->ev,
1438                                         state->cli->transport,
1439                                         state->rpc_out.data,
1440                                         state->rpc_out.length);
1441                 if (tevent_req_nomem(subreq, req)) {
1442                         return;
1443                 }
1444                 tevent_req_set_callback(subreq, rpc_api_pipe_req_write_done,
1445                                         req);
1446         }
1447 }
1448
1449 static void rpc_api_pipe_req_done(struct tevent_req *subreq)
1450 {
1451         struct tevent_req *req = tevent_req_callback_data(
1452                 subreq, struct tevent_req);
1453         struct rpc_api_pipe_req_state *state = tevent_req_data(
1454                 req, struct rpc_api_pipe_req_state);
1455         NTSTATUS status;
1456
1457         status = rpc_api_pipe_recv(subreq, state, NULL, &state->reply_pdu);
1458         TALLOC_FREE(subreq);
1459         if (!NT_STATUS_IS_OK(status)) {
1460                 tevent_req_nterror(req, status);
1461                 return;
1462         }
1463         tevent_req_done(req);
1464 }
1465
1466 NTSTATUS rpc_api_pipe_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1467                                DATA_BLOB *reply_pdu)
1468 {
1469         struct rpc_api_pipe_req_state *state = tevent_req_data(
1470                 req, struct rpc_api_pipe_req_state);
1471         NTSTATUS status;
1472
1473         if (tevent_req_is_nterror(req, &status)) {
1474                 /*
1475                  * We always have to initialize to reply pdu, even if there is
1476                  * none. The rpccli_* caller routines expect this.
1477                  */
1478                 *reply_pdu = data_blob_null;
1479                 return status;
1480         }
1481
1482         /* return data to caller and assign it ownership of memory */
1483         reply_pdu->data = talloc_move(mem_ctx, &state->reply_pdu.data);
1484         reply_pdu->length = state->reply_pdu.length;
1485         state->reply_pdu.length = 0;
1486
1487         return NT_STATUS_OK;
1488 }
1489
1490 /****************************************************************************
1491  Check the rpc bind acknowledge response.
1492 ****************************************************************************/
1493
1494 static bool check_bind_response(const struct dcerpc_bind_ack *r,
1495                                 const struct ndr_syntax_id *transfer)
1496 {
1497         struct dcerpc_ack_ctx ctx;
1498
1499         if (r->secondary_address_size == 0) {
1500                 DEBUG(4,("Ignoring length check -- ASU bug (server didn't fill in the pipe name correctly)"));
1501         }
1502
1503         if (r->num_results < 1 || !r->ctx_list) {
1504                 return false;
1505         }
1506
1507         ctx = r->ctx_list[0];
1508
1509         /* check the transfer syntax */
1510         if ((ctx.syntax.if_version != transfer->if_version) ||
1511              (memcmp(&ctx.syntax.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) {
1512                 DEBUG(2,("bind_rpc_pipe: transfer syntax differs\n"));
1513                 return False;
1514         }
1515
1516         if (r->num_results != 0x1 || ctx.result != 0) {
1517                 DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n",
1518                           r->num_results, ctx.reason));
1519         }
1520
1521         DEBUG(5,("check_bind_response: accepted!\n"));
1522         return True;
1523 }
1524
1525 /*******************************************************************
1526  Creates a DCE/RPC bind authentication response.
1527  This is the packet that is sent back to the server once we
1528  have received a BIND-ACK, to finish the third leg of
1529  the authentication handshake.
1530  ********************************************************************/
1531
1532 static NTSTATUS create_rpc_bind_auth3(TALLOC_CTX *mem_ctx,
1533                                 struct rpc_pipe_client *cli,
1534                                 uint32 rpc_call_id,
1535                                 enum dcerpc_AuthType auth_type,
1536                                 enum dcerpc_AuthLevel auth_level,
1537                                 DATA_BLOB *pauth_blob,
1538                                 DATA_BLOB *rpc_out)
1539 {
1540         NTSTATUS status;
1541         union dcerpc_payload u;
1542
1543         u.auth3._pad = 0;
1544
1545         status = dcerpc_push_dcerpc_auth(mem_ctx,
1546                                          auth_type,
1547                                          auth_level,
1548                                          0, /* auth_pad_length */
1549                                          1, /* auth_context_id */
1550                                          pauth_blob,
1551                                          &u.auth3.auth_info);
1552         if (!NT_STATUS_IS_OK(status)) {
1553                 return status;
1554         }
1555
1556         status = dcerpc_push_ncacn_packet(mem_ctx,
1557                                           DCERPC_PKT_AUTH3,
1558                                           DCERPC_PFC_FLAG_FIRST |
1559                                           DCERPC_PFC_FLAG_LAST,
1560                                           pauth_blob->length,
1561                                           rpc_call_id,
1562                                           &u,
1563                                           rpc_out);
1564         data_blob_free(&u.auth3.auth_info);
1565         if (!NT_STATUS_IS_OK(status)) {
1566                 DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall RPC_HDR_RB.\n"));
1567                 return status;
1568         }
1569
1570         return NT_STATUS_OK;
1571 }
1572
1573 /*******************************************************************
1574  Creates a DCE/RPC bind alter context authentication request which
1575  may contain a spnego auth blobl
1576  ********************************************************************/
1577
1578 static NTSTATUS create_rpc_alter_context(TALLOC_CTX *mem_ctx,
1579                                         enum dcerpc_AuthType auth_type,
1580                                         enum dcerpc_AuthLevel auth_level,
1581                                         uint32 rpc_call_id,
1582                                         const struct ndr_syntax_id *abstract,
1583                                         const struct ndr_syntax_id *transfer,
1584                                         const DATA_BLOB *pauth_blob, /* spnego auth blob already created. */
1585                                         DATA_BLOB *rpc_out)
1586 {
1587         DATA_BLOB auth_info;
1588         NTSTATUS status;
1589
1590         status = dcerpc_push_dcerpc_auth(mem_ctx,
1591                                          auth_type,
1592                                          auth_level,
1593                                          0, /* auth_pad_length */
1594                                          1, /* auth_context_id */
1595                                          pauth_blob,
1596                                          &auth_info);
1597         if (!NT_STATUS_IS_OK(status)) {
1598                 return status;
1599         }
1600
1601         status = create_bind_or_alt_ctx_internal(mem_ctx,
1602                                                  DCERPC_PKT_ALTER,
1603                                                  rpc_call_id,
1604                                                  abstract,
1605                                                  transfer,
1606                                                  &auth_info,
1607                                                  rpc_out);
1608         data_blob_free(&auth_info);
1609         return status;
1610 }
1611
1612 /****************************************************************************
1613  Do an rpc bind.
1614 ****************************************************************************/
1615
1616 struct rpc_pipe_bind_state {
1617         struct event_context *ev;
1618         struct rpc_pipe_client *cli;
1619         DATA_BLOB rpc_out;
1620         bool auth3;
1621         uint32_t rpc_call_id;
1622 };
1623
1624 static void rpc_pipe_bind_step_one_done(struct tevent_req *subreq);
1625 static NTSTATUS rpc_bind_next_send(struct tevent_req *req,
1626                                    struct rpc_pipe_bind_state *state,
1627                                    DATA_BLOB *credentials);
1628 static NTSTATUS rpc_bind_finish_send(struct tevent_req *req,
1629                                      struct rpc_pipe_bind_state *state,
1630                                      DATA_BLOB *credentials);
1631
1632 struct tevent_req *rpc_pipe_bind_send(TALLOC_CTX *mem_ctx,
1633                                       struct event_context *ev,
1634                                       struct rpc_pipe_client *cli,
1635                                       struct pipe_auth_data *auth)
1636 {
1637         struct tevent_req *req, *subreq;
1638         struct rpc_pipe_bind_state *state;
1639         NTSTATUS status;
1640
1641         req = tevent_req_create(mem_ctx, &state, struct rpc_pipe_bind_state);
1642         if (req == NULL) {
1643                 return NULL;
1644         }
1645
1646         DEBUG(5,("Bind RPC Pipe: %s auth_type %u, auth_level %u\n",
1647                 rpccli_pipe_txt(talloc_tos(), cli),
1648                 (unsigned int)auth->auth_type,
1649                 (unsigned int)auth->auth_level ));
1650
1651         state->ev = ev;
1652         state->cli = cli;
1653         state->rpc_call_id = get_rpc_call_id();
1654
1655         cli->auth = talloc_move(cli, &auth);
1656
1657         /* Marshall the outgoing data. */
1658         status = create_rpc_bind_req(state, cli,
1659                                      cli->auth,
1660                                      state->rpc_call_id,
1661                                      &cli->abstract_syntax,
1662                                      &cli->transfer_syntax,
1663                                      &state->rpc_out);
1664
1665         if (!NT_STATUS_IS_OK(status)) {
1666                 goto post_status;
1667         }
1668
1669         subreq = rpc_api_pipe_send(state, ev, cli, &state->rpc_out,
1670                                    DCERPC_PKT_BIND_ACK);
1671         if (subreq == NULL) {
1672                 goto fail;
1673         }
1674         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1675         return req;
1676
1677  post_status:
1678         tevent_req_nterror(req, status);
1679         return tevent_req_post(req, ev);
1680  fail:
1681         TALLOC_FREE(req);
1682         return NULL;
1683 }
1684
1685 static void rpc_pipe_bind_step_one_done(struct tevent_req *subreq)
1686 {
1687         struct tevent_req *req = tevent_req_callback_data(
1688                 subreq, struct tevent_req);
1689         struct rpc_pipe_bind_state *state = tevent_req_data(
1690                 req, struct rpc_pipe_bind_state);
1691         struct pipe_auth_data *pauth = state->cli->auth;
1692         struct gensec_security *gensec_security;
1693         struct spnego_context *spnego_ctx;
1694         struct gse_context *gse_ctx;
1695         struct ncacn_packet *pkt = NULL;
1696         struct dcerpc_auth auth;
1697         DATA_BLOB auth_token = data_blob_null;
1698         NTSTATUS status;
1699
1700         status = rpc_api_pipe_recv(subreq, talloc_tos(), &pkt, NULL);
1701         TALLOC_FREE(subreq);
1702         if (!NT_STATUS_IS_OK(status)) {
1703                 DEBUG(3, ("rpc_pipe_bind: %s bind request returned %s\n",
1704                           rpccli_pipe_txt(talloc_tos(), state->cli),
1705                           nt_errstr(status)));
1706                 tevent_req_nterror(req, status);
1707                 return;
1708         }
1709
1710         if (state->auth3) {
1711                 tevent_req_done(req);
1712                 return;
1713         }
1714
1715         if (!check_bind_response(&pkt->u.bind_ack, &state->cli->transfer_syntax)) {
1716                 DEBUG(2, ("rpc_pipe_bind: check_bind_response failed.\n"));
1717                 tevent_req_nterror(req, NT_STATUS_BUFFER_TOO_SMALL);
1718                 return;
1719         }
1720
1721         state->cli->max_xmit_frag = pkt->u.bind_ack.max_xmit_frag;
1722         state->cli->max_recv_frag = pkt->u.bind_ack.max_recv_frag;
1723
1724         switch(pauth->auth_type) {
1725
1726         case DCERPC_AUTH_TYPE_NONE:
1727         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1728         case DCERPC_AUTH_TYPE_SCHANNEL:
1729                 /* Bind complete. */
1730                 tevent_req_done(req);
1731                 return;
1732
1733         case DCERPC_AUTH_TYPE_NTLMSSP:
1734         case DCERPC_AUTH_TYPE_SPNEGO:
1735         case DCERPC_AUTH_TYPE_KRB5:
1736                 /* Paranoid lenght checks */
1737                 if (pkt->frag_length < DCERPC_AUTH_TRAILER_LENGTH
1738                                                 + pkt->auth_length) {
1739                         tevent_req_nterror(req,
1740                                         NT_STATUS_INFO_LENGTH_MISMATCH);
1741                         return;
1742                 }
1743                 /* get auth credentials */
1744                 status = dcerpc_pull_dcerpc_auth(talloc_tos(),
1745                                                  &pkt->u.bind_ack.auth_info,
1746                                                  &auth, false);
1747                 if (!NT_STATUS_IS_OK(status)) {
1748                         DEBUG(0, ("Failed to pull dcerpc auth: %s.\n",
1749                                   nt_errstr(status)));
1750                         tevent_req_nterror(req, status);
1751                         return;
1752                 }
1753                 break;
1754
1755         default:
1756                 goto err_out;
1757         }
1758
1759         /*
1760          * For authenticated binds we may need to do 3 or 4 leg binds.
1761          */
1762
1763         switch(pauth->auth_type) {
1764
1765         case DCERPC_AUTH_TYPE_NONE:
1766         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1767         case DCERPC_AUTH_TYPE_SCHANNEL:
1768                 /* Bind complete. */
1769                 tevent_req_done(req);
1770                 return;
1771
1772         case DCERPC_AUTH_TYPE_NTLMSSP:
1773                 gensec_security = talloc_get_type_abort(pauth->auth_ctx,
1774                                                 struct gensec_security);
1775                 status = gensec_update(gensec_security, state, NULL,
1776                                        auth.credentials, &auth_token);
1777                 if (NT_STATUS_EQUAL(status,
1778                                     NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1779                         status = rpc_bind_next_send(req, state,
1780                                                         &auth_token);
1781                 } else if (NT_STATUS_IS_OK(status)) {
1782                         status = rpc_bind_finish_send(req, state,
1783                                                         &auth_token);
1784                 }
1785                 break;
1786
1787         case DCERPC_AUTH_TYPE_SPNEGO:
1788                 spnego_ctx = talloc_get_type_abort(pauth->auth_ctx,
1789                                                    struct spnego_context);
1790                 status = spnego_get_client_auth_token(state,
1791                                                 spnego_ctx,
1792                                                 &auth.credentials,
1793                                                 &auth_token);
1794                 if (!NT_STATUS_IS_OK(status)) {
1795                         break;
1796                 }
1797                 if (auth_token.length == 0) {
1798                         /* Bind complete. */
1799                         tevent_req_done(req);
1800                         return;
1801                 }
1802                 if (spnego_require_more_processing(spnego_ctx)) {
1803                         status = rpc_bind_next_send(req, state,
1804                                                         &auth_token);
1805                 } else {
1806                         status = rpc_bind_finish_send(req, state,
1807                                                         &auth_token);
1808                 }
1809                 break;
1810
1811         case DCERPC_AUTH_TYPE_KRB5:
1812                 gse_ctx = talloc_get_type_abort(pauth->auth_ctx,
1813                                                 struct gse_context);
1814                 status = gse_get_client_auth_token(state,
1815                                                    gse_ctx,
1816                                                    &auth.credentials,
1817                                                    &auth_token);
1818                 if (!NT_STATUS_IS_OK(status)) {
1819                         break;
1820                 }
1821
1822                 if (gse_require_more_processing(gse_ctx)) {
1823                         status = rpc_bind_next_send(req, state, &auth_token);
1824                 } else {
1825                         status = rpc_bind_finish_send(req, state, &auth_token);
1826                 }
1827                 break;
1828
1829         default:
1830                 goto err_out;
1831         }
1832
1833         if (!NT_STATUS_IS_OK(status)) {
1834                 tevent_req_nterror(req, status);
1835         }
1836         return;
1837
1838 err_out:
1839         DEBUG(0,("cli_finish_bind_auth: unknown auth type %u\n",
1840                  (unsigned int)state->cli->auth->auth_type));
1841         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1842 }
1843
1844 static NTSTATUS rpc_bind_next_send(struct tevent_req *req,
1845                                    struct rpc_pipe_bind_state *state,
1846                                    DATA_BLOB *auth_token)
1847 {
1848         struct pipe_auth_data *auth = state->cli->auth;
1849         struct tevent_req *subreq;
1850         NTSTATUS status;
1851
1852         /* Now prepare the alter context pdu. */
1853         data_blob_free(&state->rpc_out);
1854
1855         status = create_rpc_alter_context(state,
1856                                           auth->auth_type,
1857                                           auth->auth_level,
1858                                           state->rpc_call_id,
1859                                           &state->cli->abstract_syntax,
1860                                           &state->cli->transfer_syntax,
1861                                           auth_token,
1862                                           &state->rpc_out);
1863         if (!NT_STATUS_IS_OK(status)) {
1864                 return status;
1865         }
1866
1867         subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1868                                    &state->rpc_out, DCERPC_PKT_ALTER_RESP);
1869         if (subreq == NULL) {
1870                 return NT_STATUS_NO_MEMORY;
1871         }
1872         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1873         return NT_STATUS_OK;
1874 }
1875
1876 static NTSTATUS rpc_bind_finish_send(struct tevent_req *req,
1877                                      struct rpc_pipe_bind_state *state,
1878                                      DATA_BLOB *auth_token)
1879 {
1880         struct pipe_auth_data *auth = state->cli->auth;
1881         struct tevent_req *subreq;
1882         NTSTATUS status;
1883
1884         state->auth3 = true;
1885
1886         /* Now prepare the auth3 context pdu. */
1887         data_blob_free(&state->rpc_out);
1888
1889         status = create_rpc_bind_auth3(state, state->cli,
1890                                         state->rpc_call_id,
1891                                         auth->auth_type,
1892                                         auth->auth_level,
1893                                         auth_token,
1894                                         &state->rpc_out);
1895         if (!NT_STATUS_IS_OK(status)) {
1896                 return status;
1897         }
1898
1899         subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1900                                    &state->rpc_out, DCERPC_PKT_AUTH3);
1901         if (subreq == NULL) {
1902                 return NT_STATUS_NO_MEMORY;
1903         }
1904         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1905         return NT_STATUS_OK;
1906 }
1907
1908 NTSTATUS rpc_pipe_bind_recv(struct tevent_req *req)
1909 {
1910         return tevent_req_simple_recv_ntstatus(req);
1911 }
1912
1913 NTSTATUS rpc_pipe_bind(struct rpc_pipe_client *cli,
1914                        struct pipe_auth_data *auth)
1915 {
1916         TALLOC_CTX *frame = talloc_stackframe();
1917         struct event_context *ev;
1918         struct tevent_req *req;
1919         NTSTATUS status = NT_STATUS_OK;
1920
1921         ev = event_context_init(frame);
1922         if (ev == NULL) {
1923                 status = NT_STATUS_NO_MEMORY;
1924                 goto fail;
1925         }
1926
1927         req = rpc_pipe_bind_send(frame, ev, cli, auth);
1928         if (req == NULL) {
1929                 status = NT_STATUS_NO_MEMORY;
1930                 goto fail;
1931         }
1932
1933         if (!tevent_req_poll(req, ev)) {
1934                 status = map_nt_error_from_unix(errno);
1935                 goto fail;
1936         }
1937
1938         status = rpc_pipe_bind_recv(req);
1939  fail:
1940         TALLOC_FREE(frame);
1941         return status;
1942 }
1943
1944 #define RPCCLI_DEFAULT_TIMEOUT 10000 /* 10 seconds. */
1945
1946 unsigned int rpccli_set_timeout(struct rpc_pipe_client *rpc_cli,
1947                                 unsigned int timeout)
1948 {
1949         unsigned int old;
1950
1951         if (rpc_cli->transport == NULL) {
1952                 return RPCCLI_DEFAULT_TIMEOUT;
1953         }
1954
1955         if (rpc_cli->transport->set_timeout == NULL) {
1956                 return RPCCLI_DEFAULT_TIMEOUT;
1957         }
1958
1959         old = rpc_cli->transport->set_timeout(rpc_cli->transport->priv, timeout);
1960         if (old == 0) {
1961                 return RPCCLI_DEFAULT_TIMEOUT;
1962         }
1963
1964         return old;
1965 }
1966
1967 bool rpccli_is_connected(struct rpc_pipe_client *rpc_cli)
1968 {
1969         if (rpc_cli == NULL) {
1970                 return false;
1971         }
1972
1973         if (rpc_cli->transport == NULL) {
1974                 return false;
1975         }
1976
1977         return rpc_cli->transport->is_connected(rpc_cli->transport->priv);
1978 }
1979
1980 struct rpccli_bh_state {
1981         struct rpc_pipe_client *rpc_cli;
1982 };
1983
1984 static bool rpccli_bh_is_connected(struct dcerpc_binding_handle *h)
1985 {
1986         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
1987                                      struct rpccli_bh_state);
1988
1989         return rpccli_is_connected(hs->rpc_cli);
1990 }
1991
1992 static uint32_t rpccli_bh_set_timeout(struct dcerpc_binding_handle *h,
1993                                       uint32_t timeout)
1994 {
1995         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
1996                                      struct rpccli_bh_state);
1997
1998         return rpccli_set_timeout(hs->rpc_cli, timeout);
1999 }
2000
2001 struct rpccli_bh_raw_call_state {
2002         DATA_BLOB in_data;
2003         DATA_BLOB out_data;
2004         uint32_t out_flags;
2005 };
2006
2007 static void rpccli_bh_raw_call_done(struct tevent_req *subreq);
2008
2009 static struct tevent_req *rpccli_bh_raw_call_send(TALLOC_CTX *mem_ctx,
2010                                                   struct tevent_context *ev,
2011                                                   struct dcerpc_binding_handle *h,
2012                                                   const struct GUID *object,
2013                                                   uint32_t opnum,
2014                                                   uint32_t in_flags,
2015                                                   const uint8_t *in_data,
2016                                                   size_t in_length)
2017 {
2018         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2019                                      struct rpccli_bh_state);
2020         struct tevent_req *req;
2021         struct rpccli_bh_raw_call_state *state;
2022         bool ok;
2023         struct tevent_req *subreq;
2024
2025         req = tevent_req_create(mem_ctx, &state,
2026                                 struct rpccli_bh_raw_call_state);
2027         if (req == NULL) {
2028                 return NULL;
2029         }
2030         state->in_data.data = discard_const_p(uint8_t, in_data);
2031         state->in_data.length = in_length;
2032
2033         ok = rpccli_bh_is_connected(h);
2034         if (!ok) {
2035                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
2036                 return tevent_req_post(req, ev);
2037         }
2038
2039         subreq = rpc_api_pipe_req_send(state, ev, hs->rpc_cli,
2040                                        opnum, &state->in_data);
2041         if (tevent_req_nomem(subreq, req)) {
2042                 return tevent_req_post(req, ev);
2043         }
2044         tevent_req_set_callback(subreq, rpccli_bh_raw_call_done, req);
2045
2046         return req;
2047 }
2048
2049 static void rpccli_bh_raw_call_done(struct tevent_req *subreq)
2050 {
2051         struct tevent_req *req =
2052                 tevent_req_callback_data(subreq,
2053                 struct tevent_req);
2054         struct rpccli_bh_raw_call_state *state =
2055                 tevent_req_data(req,
2056                 struct rpccli_bh_raw_call_state);
2057         NTSTATUS status;
2058
2059         state->out_flags = 0;
2060
2061         /* TODO: support bigendian responses */
2062
2063         status = rpc_api_pipe_req_recv(subreq, state, &state->out_data);
2064         TALLOC_FREE(subreq);
2065         if (!NT_STATUS_IS_OK(status)) {
2066                 tevent_req_nterror(req, status);
2067                 return;
2068         }
2069
2070         tevent_req_done(req);
2071 }
2072
2073 static NTSTATUS rpccli_bh_raw_call_recv(struct tevent_req *req,
2074                                         TALLOC_CTX *mem_ctx,
2075                                         uint8_t **out_data,
2076                                         size_t *out_length,
2077                                         uint32_t *out_flags)
2078 {
2079         struct rpccli_bh_raw_call_state *state =
2080                 tevent_req_data(req,
2081                 struct rpccli_bh_raw_call_state);
2082         NTSTATUS status;
2083
2084         if (tevent_req_is_nterror(req, &status)) {
2085                 tevent_req_received(req);
2086                 return status;
2087         }
2088
2089         *out_data = talloc_move(mem_ctx, &state->out_data.data);
2090         *out_length = state->out_data.length;
2091         *out_flags = state->out_flags;
2092         tevent_req_received(req);
2093         return NT_STATUS_OK;
2094 }
2095
2096 struct rpccli_bh_disconnect_state {
2097         uint8_t _dummy;
2098 };
2099
2100 static struct tevent_req *rpccli_bh_disconnect_send(TALLOC_CTX *mem_ctx,
2101                                                 struct tevent_context *ev,
2102                                                 struct dcerpc_binding_handle *h)
2103 {
2104         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2105                                      struct rpccli_bh_state);
2106         struct tevent_req *req;
2107         struct rpccli_bh_disconnect_state *state;
2108         bool ok;
2109
2110         req = tevent_req_create(mem_ctx, &state,
2111                                 struct rpccli_bh_disconnect_state);
2112         if (req == NULL) {
2113                 return NULL;
2114         }
2115
2116         ok = rpccli_bh_is_connected(h);
2117         if (!ok) {
2118                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
2119                 return tevent_req_post(req, ev);
2120         }
2121
2122         /*
2123          * TODO: do a real async disconnect ...
2124          *
2125          * For now the caller needs to free rpc_cli
2126          */
2127         hs->rpc_cli = NULL;
2128
2129         tevent_req_done(req);
2130         return tevent_req_post(req, ev);
2131 }
2132
2133 static NTSTATUS rpccli_bh_disconnect_recv(struct tevent_req *req)
2134 {
2135         NTSTATUS status;
2136
2137         if (tevent_req_is_nterror(req, &status)) {
2138                 tevent_req_received(req);
2139                 return status;
2140         }
2141
2142         tevent_req_received(req);
2143         return NT_STATUS_OK;
2144 }
2145
2146 static bool rpccli_bh_ref_alloc(struct dcerpc_binding_handle *h)
2147 {
2148         return true;
2149 }
2150
2151 static void rpccli_bh_do_ndr_print(struct dcerpc_binding_handle *h,
2152                                    int ndr_flags,
2153                                    const void *_struct_ptr,
2154                                    const struct ndr_interface_call *call)
2155 {
2156         void *struct_ptr = discard_const(_struct_ptr);
2157
2158         if (DEBUGLEVEL < 10) {
2159                 return;
2160         }
2161
2162         if (ndr_flags & NDR_IN) {
2163                 ndr_print_function_debug(call->ndr_print,
2164                                          call->name,
2165                                          ndr_flags,
2166                                          struct_ptr);
2167         }
2168         if (ndr_flags & NDR_OUT) {
2169                 ndr_print_function_debug(call->ndr_print,
2170                                          call->name,
2171                                          ndr_flags,
2172                                          struct_ptr);
2173         }
2174 }
2175
2176 static const struct dcerpc_binding_handle_ops rpccli_bh_ops = {
2177         .name                   = "rpccli",
2178         .is_connected           = rpccli_bh_is_connected,
2179         .set_timeout            = rpccli_bh_set_timeout,
2180         .raw_call_send          = rpccli_bh_raw_call_send,
2181         .raw_call_recv          = rpccli_bh_raw_call_recv,
2182         .disconnect_send        = rpccli_bh_disconnect_send,
2183         .disconnect_recv        = rpccli_bh_disconnect_recv,
2184
2185         .ref_alloc              = rpccli_bh_ref_alloc,
2186         .do_ndr_print           = rpccli_bh_do_ndr_print,
2187 };
2188
2189 /* initialise a rpc_pipe_client binding handle */
2190 struct dcerpc_binding_handle *rpccli_bh_create(struct rpc_pipe_client *c)
2191 {
2192         struct dcerpc_binding_handle *h;
2193         struct rpccli_bh_state *hs;
2194
2195         h = dcerpc_binding_handle_create(c,
2196                                          &rpccli_bh_ops,
2197                                          NULL,
2198                                          NULL, /* TODO */
2199                                          &hs,
2200                                          struct rpccli_bh_state,
2201                                          __location__);
2202         if (h == NULL) {
2203                 return NULL;
2204         }
2205         hs->rpc_cli = c;
2206
2207         return h;
2208 }
2209
2210 NTSTATUS rpccli_ncalrpc_bind_data(TALLOC_CTX *mem_ctx,
2211                                   struct pipe_auth_data **presult)
2212 {
2213         struct pipe_auth_data *result;
2214
2215         result = talloc(mem_ctx, struct pipe_auth_data);
2216         if (result == NULL) {
2217                 return NT_STATUS_NO_MEMORY;
2218         }
2219
2220         result->auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM;
2221         result->auth_level = DCERPC_AUTH_LEVEL_CONNECT;
2222
2223         result->user_name = talloc_strdup(result, "");
2224         result->domain = talloc_strdup(result, "");
2225         if ((result->user_name == NULL) || (result->domain == NULL)) {
2226                 TALLOC_FREE(result);
2227                 return NT_STATUS_NO_MEMORY;
2228         }
2229
2230         *presult = result;
2231         return NT_STATUS_OK;
2232 }
2233
2234 NTSTATUS rpccli_anon_bind_data(TALLOC_CTX *mem_ctx,
2235                                struct pipe_auth_data **presult)
2236 {
2237         struct pipe_auth_data *result;
2238
2239         result = talloc(mem_ctx, struct pipe_auth_data);
2240         if (result == NULL) {
2241                 return NT_STATUS_NO_MEMORY;
2242         }
2243
2244         result->auth_type = DCERPC_AUTH_TYPE_NONE;
2245         result->auth_level = DCERPC_AUTH_LEVEL_NONE;
2246
2247         result->user_name = talloc_strdup(result, "");
2248         result->domain = talloc_strdup(result, "");
2249         if ((result->user_name == NULL) || (result->domain == NULL)) {
2250                 TALLOC_FREE(result);
2251                 return NT_STATUS_NO_MEMORY;
2252         }
2253
2254         *presult = result;
2255         return NT_STATUS_OK;
2256 }
2257
2258 static NTSTATUS rpccli_generic_bind_data(TALLOC_CTX *mem_ctx,
2259                                          enum dcerpc_AuthType auth_type,
2260                                          enum dcerpc_AuthLevel auth_level,
2261                                          const char *server,
2262                                          const char *target_service,
2263                                          const char *domain,
2264                                          const char *username,
2265                                          const char *password,
2266                                          struct pipe_auth_data **presult)
2267 {
2268         struct auth_generic_state *auth_generic_ctx;
2269         struct pipe_auth_data *result;
2270         NTSTATUS status;
2271
2272         result = talloc(mem_ctx, struct pipe_auth_data);
2273         if (result == NULL) {
2274                 return NT_STATUS_NO_MEMORY;
2275         }
2276
2277         result->auth_type = auth_type;
2278         result->auth_level = auth_level;
2279
2280         result->user_name = talloc_strdup(result, username);
2281         result->domain = talloc_strdup(result, domain);
2282         if ((result->user_name == NULL) || (result->domain == NULL)) {
2283                 status = NT_STATUS_NO_MEMORY;
2284                 goto fail;
2285         }
2286
2287         status = auth_generic_client_prepare(result,
2288                                              &auth_generic_ctx);
2289         if (!NT_STATUS_IS_OK(status)) {
2290                 goto fail;
2291         }
2292
2293         status = auth_generic_set_username(auth_generic_ctx, username);
2294         if (!NT_STATUS_IS_OK(status)) {
2295                 goto fail;
2296         }
2297
2298         status = auth_generic_set_domain(auth_generic_ctx, domain);
2299         if (!NT_STATUS_IS_OK(status)) {
2300                 goto fail;
2301         }
2302
2303         status = auth_generic_set_password(auth_generic_ctx, password);
2304         if (!NT_STATUS_IS_OK(status)) {
2305                 goto fail;
2306         }
2307
2308         status = auth_generic_client_start_by_authtype(auth_generic_ctx, auth_type, auth_level);
2309         if (!NT_STATUS_IS_OK(status)) {
2310                 goto fail;
2311         }
2312
2313         result->auth_ctx = talloc_move(result, &auth_generic_ctx->gensec_security);
2314         talloc_free(auth_generic_ctx);
2315         *presult = result;
2316         return NT_STATUS_OK;
2317
2318  fail:
2319         TALLOC_FREE(result);
2320         return status;
2321 }
2322
2323 NTSTATUS rpccli_schannel_bind_data(TALLOC_CTX *mem_ctx, const char *domain,
2324                                    enum dcerpc_AuthLevel auth_level,
2325                                    struct netlogon_creds_CredentialState *creds,
2326                                    struct pipe_auth_data **presult)
2327 {
2328         struct schannel_state *schannel_auth;
2329         struct pipe_auth_data *result;
2330
2331         result = talloc(mem_ctx, struct pipe_auth_data);
2332         if (result == NULL) {
2333                 return NT_STATUS_NO_MEMORY;
2334         }
2335
2336         result->auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
2337         result->auth_level = auth_level;
2338
2339         result->user_name = talloc_strdup(result, "");
2340         result->domain = talloc_strdup(result, domain);
2341         if ((result->user_name == NULL) || (result->domain == NULL)) {
2342                 goto fail;
2343         }
2344
2345         schannel_auth = talloc(result, struct schannel_state);
2346         if (schannel_auth == NULL) {
2347                 goto fail;
2348         }
2349
2350         schannel_auth->state = SCHANNEL_STATE_START;
2351         schannel_auth->seq_num = 0;
2352         schannel_auth->initiator = true;
2353         schannel_auth->creds = netlogon_creds_copy(result, creds);
2354
2355         result->auth_ctx = schannel_auth;
2356         *presult = result;
2357         return NT_STATUS_OK;
2358
2359  fail:
2360         TALLOC_FREE(result);
2361         return NT_STATUS_NO_MEMORY;
2362 }
2363
2364 /**
2365  * Create an rpc pipe client struct, connecting to a tcp port.
2366  */
2367 static NTSTATUS rpc_pipe_open_tcp_port(TALLOC_CTX *mem_ctx, const char *host,
2368                                        uint16_t port,
2369                                        const struct ndr_syntax_id *abstract_syntax,
2370                                        struct rpc_pipe_client **presult)
2371 {
2372         struct rpc_pipe_client *result;
2373         struct sockaddr_storage addr;
2374         NTSTATUS status;
2375         int fd;
2376
2377         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
2378         if (result == NULL) {
2379                 return NT_STATUS_NO_MEMORY;
2380         }
2381
2382         result->abstract_syntax = *abstract_syntax;
2383         result->transfer_syntax = ndr_transfer_syntax;
2384
2385         result->desthost = talloc_strdup(result, host);
2386         result->srv_name_slash = talloc_asprintf_strupper_m(
2387                 result, "\\\\%s", result->desthost);
2388         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2389                 status = NT_STATUS_NO_MEMORY;
2390                 goto fail;
2391         }
2392
2393         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2394         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2395
2396         if (!resolve_name(host, &addr, 0, false)) {
2397                 status = NT_STATUS_NOT_FOUND;
2398                 goto fail;
2399         }
2400
2401         status = open_socket_out(&addr, port, 60*1000, &fd);
2402         if (!NT_STATUS_IS_OK(status)) {
2403                 goto fail;
2404         }
2405         set_socket_options(fd, lp_socket_options());
2406
2407         status = rpc_transport_sock_init(result, fd, &result->transport);
2408         if (!NT_STATUS_IS_OK(status)) {
2409                 close(fd);
2410                 goto fail;
2411         }
2412
2413         result->transport->transport = NCACN_IP_TCP;
2414
2415         result->binding_handle = rpccli_bh_create(result);
2416         if (result->binding_handle == NULL) {
2417                 TALLOC_FREE(result);
2418                 return NT_STATUS_NO_MEMORY;
2419         }
2420
2421         *presult = result;
2422         return NT_STATUS_OK;
2423
2424  fail:
2425         TALLOC_FREE(result);
2426         return status;
2427 }
2428
2429 /**
2430  * Determine the tcp port on which a dcerpc interface is listening
2431  * for the ncacn_ip_tcp transport via the endpoint mapper of the
2432  * target host.
2433  */
2434 static NTSTATUS rpc_pipe_get_tcp_port(const char *host,
2435                                       const struct ndr_syntax_id *abstract_syntax,
2436                                       uint16_t *pport)
2437 {
2438         NTSTATUS status;
2439         struct rpc_pipe_client *epm_pipe = NULL;
2440         struct dcerpc_binding_handle *epm_handle = NULL;
2441         struct pipe_auth_data *auth = NULL;
2442         struct dcerpc_binding *map_binding = NULL;
2443         struct dcerpc_binding *res_binding = NULL;
2444         struct epm_twr_t *map_tower = NULL;
2445         struct epm_twr_t *res_towers = NULL;
2446         struct policy_handle *entry_handle = NULL;
2447         uint32_t num_towers = 0;
2448         uint32_t max_towers = 1;
2449         struct epm_twr_p_t towers;
2450         TALLOC_CTX *tmp_ctx = talloc_stackframe();
2451         uint32_t result = 0;
2452
2453         if (pport == NULL) {
2454                 status = NT_STATUS_INVALID_PARAMETER;
2455                 goto done;
2456         }
2457
2458         if (ndr_syntax_id_equal(abstract_syntax,
2459                                 &ndr_table_epmapper.syntax_id)) {
2460                 *pport = 135;
2461                 return NT_STATUS_OK;
2462         }
2463
2464         /* open the connection to the endpoint mapper */
2465         status = rpc_pipe_open_tcp_port(tmp_ctx, host, 135,
2466                                         &ndr_table_epmapper.syntax_id,
2467                                         &epm_pipe);
2468
2469         if (!NT_STATUS_IS_OK(status)) {
2470                 goto done;
2471         }
2472         epm_handle = epm_pipe->binding_handle;
2473
2474         status = rpccli_anon_bind_data(tmp_ctx, &auth);
2475         if (!NT_STATUS_IS_OK(status)) {
2476                 goto done;
2477         }
2478
2479         status = rpc_pipe_bind(epm_pipe, auth);
2480         if (!NT_STATUS_IS_OK(status)) {
2481                 goto done;
2482         }
2483
2484         /* create tower for asking the epmapper */
2485
2486         map_binding = talloc_zero(tmp_ctx, struct dcerpc_binding);
2487         if (map_binding == NULL) {
2488                 status = NT_STATUS_NO_MEMORY;
2489                 goto done;
2490         }
2491
2492         map_binding->transport = NCACN_IP_TCP;
2493         map_binding->object = *abstract_syntax;
2494         map_binding->host = host; /* needed? */
2495         map_binding->endpoint = "0"; /* correct? needed? */
2496
2497         map_tower = talloc_zero(tmp_ctx, struct epm_twr_t);
2498         if (map_tower == NULL) {
2499                 status = NT_STATUS_NO_MEMORY;
2500                 goto done;
2501         }
2502
2503         status = dcerpc_binding_build_tower(tmp_ctx, map_binding,
2504                                             &(map_tower->tower));
2505         if (!NT_STATUS_IS_OK(status)) {
2506                 goto done;
2507         }
2508
2509         /* allocate further parameters for the epm_Map call */
2510
2511         res_towers = talloc_array(tmp_ctx, struct epm_twr_t, max_towers);
2512         if (res_towers == NULL) {
2513                 status = NT_STATUS_NO_MEMORY;
2514                 goto done;
2515         }
2516         towers.twr = res_towers;
2517
2518         entry_handle = talloc_zero(tmp_ctx, struct policy_handle);
2519         if (entry_handle == NULL) {
2520                 status = NT_STATUS_NO_MEMORY;
2521                 goto done;
2522         }
2523
2524         /* ask the endpoint mapper for the port */
2525
2526         status = dcerpc_epm_Map(epm_handle,
2527                                 tmp_ctx,
2528                                 discard_const_p(struct GUID,
2529                                               &(abstract_syntax->uuid)),
2530                                 map_tower,
2531                                 entry_handle,
2532                                 max_towers,
2533                                 &num_towers,
2534                                 &towers,
2535                                 &result);
2536
2537         if (!NT_STATUS_IS_OK(status)) {
2538                 goto done;
2539         }
2540
2541         if (result != EPMAPPER_STATUS_OK) {
2542                 status = NT_STATUS_UNSUCCESSFUL;
2543                 goto done;
2544         }
2545
2546         if (num_towers != 1) {
2547                 status = NT_STATUS_UNSUCCESSFUL;
2548                 goto done;
2549         }
2550
2551         /* extract the port from the answer */
2552
2553         status = dcerpc_binding_from_tower(tmp_ctx,
2554                                            &(towers.twr->tower),
2555                                            &res_binding);
2556         if (!NT_STATUS_IS_OK(status)) {
2557                 goto done;
2558         }
2559
2560         /* are further checks here necessary? */
2561         if (res_binding->transport != NCACN_IP_TCP) {
2562                 status = NT_STATUS_UNSUCCESSFUL;
2563                 goto done;
2564         }
2565
2566         *pport = (uint16_t)atoi(res_binding->endpoint);
2567
2568 done:
2569         TALLOC_FREE(tmp_ctx);
2570         return status;
2571 }
2572
2573 /**
2574  * Create a rpc pipe client struct, connecting to a host via tcp.
2575  * The port is determined by asking the endpoint mapper on the given
2576  * host.
2577  */
2578 NTSTATUS rpc_pipe_open_tcp(TALLOC_CTX *mem_ctx, const char *host,
2579                            const struct ndr_syntax_id *abstract_syntax,
2580                            struct rpc_pipe_client **presult)
2581 {
2582         NTSTATUS status;
2583         uint16_t port = 0;
2584
2585         status = rpc_pipe_get_tcp_port(host, abstract_syntax, &port);
2586         if (!NT_STATUS_IS_OK(status)) {
2587                 return status;
2588         }
2589
2590         return rpc_pipe_open_tcp_port(mem_ctx, host, port,
2591                                         abstract_syntax, presult);
2592 }
2593
2594 /********************************************************************
2595  Create a rpc pipe client struct, connecting to a unix domain socket
2596  ********************************************************************/
2597 NTSTATUS rpc_pipe_open_ncalrpc(TALLOC_CTX *mem_ctx, const char *socket_path,
2598                                const struct ndr_syntax_id *abstract_syntax,
2599                                struct rpc_pipe_client **presult)
2600 {
2601         struct rpc_pipe_client *result;
2602         struct sockaddr_un addr;
2603         NTSTATUS status;
2604         int fd;
2605
2606         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
2607         if (result == NULL) {
2608                 return NT_STATUS_NO_MEMORY;
2609         }
2610
2611         result->abstract_syntax = *abstract_syntax;
2612         result->transfer_syntax = ndr_transfer_syntax;
2613
2614         result->desthost = get_myname(result);
2615         result->srv_name_slash = talloc_asprintf_strupper_m(
2616                 result, "\\\\%s", result->desthost);
2617         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2618                 status = NT_STATUS_NO_MEMORY;
2619                 goto fail;
2620         }
2621
2622         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2623         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2624
2625         fd = socket(AF_UNIX, SOCK_STREAM, 0);
2626         if (fd == -1) {
2627                 status = map_nt_error_from_unix(errno);
2628                 goto fail;
2629         }
2630
2631         ZERO_STRUCT(addr);
2632         addr.sun_family = AF_UNIX;
2633         strlcpy(addr.sun_path, socket_path, sizeof(addr.sun_path));
2634
2635         if (sys_connect(fd, (struct sockaddr *)(void *)&addr) == -1) {
2636                 DEBUG(0, ("connect(%s) failed: %s\n", socket_path,
2637                           strerror(errno)));
2638                 close(fd);
2639                 return map_nt_error_from_unix(errno);
2640         }
2641
2642         status = rpc_transport_sock_init(result, fd, &result->transport);
2643         if (!NT_STATUS_IS_OK(status)) {
2644                 close(fd);
2645                 goto fail;
2646         }
2647
2648         result->transport->transport = NCALRPC;
2649
2650         result->binding_handle = rpccli_bh_create(result);
2651         if (result->binding_handle == NULL) {
2652                 TALLOC_FREE(result);
2653                 return NT_STATUS_NO_MEMORY;
2654         }
2655
2656         *presult = result;
2657         return NT_STATUS_OK;
2658
2659  fail:
2660         TALLOC_FREE(result);
2661         return status;
2662 }
2663
2664 struct rpc_pipe_client_np_ref {
2665         struct cli_state *cli;
2666         struct rpc_pipe_client *pipe;
2667 };
2668
2669 static int rpc_pipe_client_np_ref_destructor(struct rpc_pipe_client_np_ref *np_ref)
2670 {
2671         DLIST_REMOVE(np_ref->cli->pipe_list, np_ref->pipe);
2672         return 0;
2673 }
2674
2675 /****************************************************************************
2676  Open a named pipe over SMB to a remote server.
2677  *
2678  * CAVEAT CALLER OF THIS FUNCTION:
2679  *    The returned rpc_pipe_client saves a copy of the cli_state cli pointer,
2680  *    so be sure that this function is called AFTER any structure (vs pointer)
2681  *    assignment of the cli.  In particular, libsmbclient does structure
2682  *    assignments of cli, which invalidates the data in the returned
2683  *    rpc_pipe_client if this function is called before the structure assignment
2684  *    of cli.
2685  *
2686  ****************************************************************************/
2687
2688 static NTSTATUS rpc_pipe_open_np(struct cli_state *cli,
2689                                  const struct ndr_syntax_id *abstract_syntax,
2690                                  struct rpc_pipe_client **presult)
2691 {
2692         struct rpc_pipe_client *result;
2693         NTSTATUS status;
2694         struct rpc_pipe_client_np_ref *np_ref;
2695
2696         /* sanity check to protect against crashes */
2697
2698         if ( !cli ) {
2699                 return NT_STATUS_INVALID_HANDLE;
2700         }
2701
2702         result = talloc_zero(NULL, struct rpc_pipe_client);
2703         if (result == NULL) {
2704                 return NT_STATUS_NO_MEMORY;
2705         }
2706
2707         result->abstract_syntax = *abstract_syntax;
2708         result->transfer_syntax = ndr_transfer_syntax;
2709         result->desthost = talloc_strdup(result, cli_state_remote_name(cli));
2710         result->srv_name_slash = talloc_asprintf_strupper_m(
2711                 result, "\\\\%s", result->desthost);
2712
2713         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2714         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2715
2716         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2717                 TALLOC_FREE(result);
2718                 return NT_STATUS_NO_MEMORY;
2719         }
2720
2721         status = rpc_transport_np_init(result, cli, abstract_syntax,
2722                                        &result->transport);
2723         if (!NT_STATUS_IS_OK(status)) {
2724                 TALLOC_FREE(result);
2725                 return status;
2726         }
2727
2728         result->transport->transport = NCACN_NP;
2729
2730         np_ref = talloc(result->transport, struct rpc_pipe_client_np_ref);
2731         if (np_ref == NULL) {
2732                 TALLOC_FREE(result);
2733                 return NT_STATUS_NO_MEMORY;
2734         }
2735         np_ref->cli = cli;
2736         np_ref->pipe = result;
2737
2738         DLIST_ADD(np_ref->cli->pipe_list, np_ref->pipe);
2739         talloc_set_destructor(np_ref, rpc_pipe_client_np_ref_destructor);
2740
2741         result->binding_handle = rpccli_bh_create(result);
2742         if (result->binding_handle == NULL) {
2743                 TALLOC_FREE(result);
2744                 return NT_STATUS_NO_MEMORY;
2745         }
2746
2747         *presult = result;
2748         return NT_STATUS_OK;
2749 }
2750
2751 /****************************************************************************
2752  Open a pipe to a remote server.
2753  ****************************************************************************/
2754
2755 static NTSTATUS cli_rpc_pipe_open(struct cli_state *cli,
2756                                   enum dcerpc_transport_t transport,
2757                                   const struct ndr_syntax_id *interface,
2758                                   struct rpc_pipe_client **presult)
2759 {
2760         switch (transport) {
2761         case NCACN_IP_TCP:
2762                 return rpc_pipe_open_tcp(NULL, cli_state_remote_name(cli),
2763                                          interface, presult);
2764         case NCACN_NP:
2765                 return rpc_pipe_open_np(cli, interface, presult);
2766         default:
2767                 return NT_STATUS_NOT_IMPLEMENTED;
2768         }
2769 }
2770
2771 /****************************************************************************
2772  Open a named pipe to an SMB server and bind anonymously.
2773  ****************************************************************************/
2774
2775 NTSTATUS cli_rpc_pipe_open_noauth_transport(struct cli_state *cli,
2776                                             enum dcerpc_transport_t transport,
2777                                             const struct ndr_syntax_id *interface,
2778                                             struct rpc_pipe_client **presult)
2779 {
2780         struct rpc_pipe_client *result;
2781         struct pipe_auth_data *auth;
2782         NTSTATUS status;
2783
2784         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2785         if (!NT_STATUS_IS_OK(status)) {
2786                 return status;
2787         }
2788
2789         status = rpccli_anon_bind_data(result, &auth);
2790         if (!NT_STATUS_IS_OK(status)) {
2791                 DEBUG(0, ("rpccli_anon_bind_data returned %s\n",
2792                           nt_errstr(status)));
2793                 TALLOC_FREE(result);
2794                 return status;
2795         }
2796
2797         /*
2798          * This is a bit of an abstraction violation due to the fact that an
2799          * anonymous bind on an authenticated SMB inherits the user/domain
2800          * from the enclosing SMB creds
2801          */
2802
2803         TALLOC_FREE(auth->user_name);
2804         TALLOC_FREE(auth->domain);
2805
2806         auth->user_name = talloc_strdup(auth, cli->user_name);
2807         auth->domain = talloc_strdup(auth, cli->domain);
2808         auth->user_session_key = data_blob_talloc(auth,
2809                 cli->user_session_key.data,
2810                 cli->user_session_key.length);
2811
2812         if ((auth->user_name == NULL) || (auth->domain == NULL)) {
2813                 TALLOC_FREE(result);
2814                 return NT_STATUS_NO_MEMORY;
2815         }
2816
2817         status = rpc_pipe_bind(result, auth);
2818         if (!NT_STATUS_IS_OK(status)) {
2819                 int lvl = 0;
2820                 if (ndr_syntax_id_equal(interface,
2821                                         &ndr_table_dssetup.syntax_id)) {
2822                         /* non AD domains just don't have this pipe, avoid
2823                          * level 0 statement in that case - gd */
2824                         lvl = 3;
2825                 }
2826                 DEBUG(lvl, ("cli_rpc_pipe_open_noauth: rpc_pipe_bind for pipe "
2827                             "%s failed with error %s\n",
2828                             get_pipe_name_from_syntax(talloc_tos(), interface),
2829                             nt_errstr(status) ));
2830                 TALLOC_FREE(result);
2831                 return status;
2832         }
2833
2834         DEBUG(10,("cli_rpc_pipe_open_noauth: opened pipe %s to machine "
2835                   "%s and bound anonymously.\n",
2836                   get_pipe_name_from_syntax(talloc_tos(), interface),
2837                   result->desthost));
2838
2839         *presult = result;
2840         return NT_STATUS_OK;
2841 }
2842
2843 /****************************************************************************
2844  ****************************************************************************/
2845
2846 NTSTATUS cli_rpc_pipe_open_noauth(struct cli_state *cli,
2847                                   const struct ndr_syntax_id *interface,
2848                                   struct rpc_pipe_client **presult)
2849 {
2850         return cli_rpc_pipe_open_noauth_transport(cli, NCACN_NP,
2851                                                   interface, presult);
2852 }
2853
2854 /****************************************************************************
2855  Open a named pipe to an SMB server and bind using the mech specified
2856  ****************************************************************************/
2857
2858 NTSTATUS cli_rpc_pipe_open_generic_auth(struct cli_state *cli,
2859                                         const struct ndr_syntax_id *interface,
2860                                         enum dcerpc_transport_t transport,
2861                                         enum dcerpc_AuthType auth_type,
2862                                         enum dcerpc_AuthLevel auth_level,
2863                                         const char *server,
2864                                         const char *domain,
2865                                         const char *username,
2866                                         const char *password,
2867                                         struct rpc_pipe_client **presult)
2868 {
2869         struct rpc_pipe_client *result;
2870         struct pipe_auth_data *auth = NULL;
2871         const char *target_service = "cifs"; /* TODO: Determine target service from the bindings or interface table */
2872         NTSTATUS status;
2873
2874         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2875         if (!NT_STATUS_IS_OK(status)) {
2876                 return status;
2877         }
2878
2879         status = rpccli_generic_bind_data(result,
2880                                           auth_type, auth_level,
2881                                           server, target_service,
2882                                           domain, username, password,
2883                                           &auth);
2884         if (!NT_STATUS_IS_OK(status)) {
2885                 DEBUG(0, ("rpccli_generic_bind_data returned %s\n",
2886                           nt_errstr(status)));
2887                 goto err;
2888         }
2889
2890         status = rpc_pipe_bind(result, auth);
2891         if (!NT_STATUS_IS_OK(status)) {
2892                 DEBUG(0, ("cli_rpc_pipe_open_generic_auth: cli_rpc_pipe_bind failed with error %s\n",
2893                         nt_errstr(status) ));
2894                 goto err;
2895         }
2896
2897         DEBUG(10,("cli_rpc_pipe_open_generic_auth: opened pipe %s to "
2898                 "machine %s and bound as user %s\\%s.\n",
2899                   get_pipe_name_from_syntax(talloc_tos(), interface),
2900                   result->desthost, domain, username));
2901
2902         *presult = result;
2903         return NT_STATUS_OK;
2904
2905   err:
2906
2907         TALLOC_FREE(result);
2908         return status;
2909 }
2910
2911 /****************************************************************************
2912  External interface.
2913  Open a named pipe to an SMB server and bind using schannel (bind type 68)
2914  using session_key. sign and seal.
2915
2916  The *pdc will be stolen onto this new pipe
2917  ****************************************************************************/
2918
2919 NTSTATUS cli_rpc_pipe_open_schannel_with_key(struct cli_state *cli,
2920                                              const struct ndr_syntax_id *interface,
2921                                              enum dcerpc_transport_t transport,
2922                                              enum dcerpc_AuthLevel auth_level,
2923                                              const char *domain,
2924                                              struct netlogon_creds_CredentialState **pdc,
2925                                              struct rpc_pipe_client **presult)
2926 {
2927         struct rpc_pipe_client *result;
2928         struct pipe_auth_data *auth;
2929         NTSTATUS status;
2930
2931         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2932         if (!NT_STATUS_IS_OK(status)) {
2933                 return status;
2934         }
2935
2936         status = rpccli_schannel_bind_data(result, domain, auth_level,
2937                                            *pdc, &auth);
2938         if (!NT_STATUS_IS_OK(status)) {
2939                 DEBUG(0, ("rpccli_schannel_bind_data returned %s\n",
2940                           nt_errstr(status)));
2941                 TALLOC_FREE(result);
2942                 return status;
2943         }
2944
2945         status = rpc_pipe_bind(result, auth);
2946         if (!NT_STATUS_IS_OK(status)) {
2947                 DEBUG(0, ("cli_rpc_pipe_open_schannel_with_key: "
2948                           "cli_rpc_pipe_bind failed with error %s\n",
2949                           nt_errstr(status) ));
2950                 TALLOC_FREE(result);
2951                 return status;
2952         }
2953
2954         /*
2955          * The credentials on a new netlogon pipe are the ones we are passed
2956          * in - copy them over
2957          */
2958         result->dc = netlogon_creds_copy(result, *pdc);
2959         if (result->dc == NULL) {
2960                 TALLOC_FREE(result);
2961                 return NT_STATUS_NO_MEMORY;
2962         }
2963
2964         DEBUG(10,("cli_rpc_pipe_open_schannel_with_key: opened pipe %s to machine %s "
2965                   "for domain %s and bound using schannel.\n",
2966                   get_pipe_name_from_syntax(talloc_tos(), interface),
2967                   result->desthost, domain));
2968
2969         *presult = result;
2970         return NT_STATUS_OK;
2971 }
2972
2973 /****************************************************************************
2974  Open a named pipe to an SMB server and bind using krb5 (bind type 16).
2975  The idea is this can be called with service_princ, username and password all
2976  NULL so long as the caller has a TGT.
2977  ****************************************************************************/
2978
2979 NTSTATUS cli_rpc_pipe_open_krb5(struct cli_state *cli,
2980                                 const struct ndr_syntax_id *interface,
2981                                 enum dcerpc_transport_t transport,
2982                                 enum dcerpc_AuthLevel auth_level,
2983                                 const char *server,
2984                                 const char *username,
2985                                 const char *password,
2986                                 struct rpc_pipe_client **presult)
2987 {
2988         struct rpc_pipe_client *result;
2989         struct pipe_auth_data *auth;
2990         struct gse_context *gse_ctx;
2991         NTSTATUS status;
2992
2993         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2994         if (!NT_STATUS_IS_OK(status)) {
2995                 return status;
2996         }
2997
2998         auth = talloc(result, struct pipe_auth_data);
2999         if (auth == NULL) {
3000                 status = NT_STATUS_NO_MEMORY;
3001                 goto err_out;
3002         }
3003         auth->auth_type = DCERPC_AUTH_TYPE_KRB5;
3004         auth->auth_level = auth_level;
3005
3006         if (!username) {
3007                 username = "";
3008         }
3009         auth->user_name = talloc_strdup(auth, username);
3010         if (!auth->user_name) {
3011                 status = NT_STATUS_NO_MEMORY;
3012                 goto err_out;
3013         }
3014
3015         /* Fixme, should we fetch/set the Realm ? */
3016         auth->domain = talloc_strdup(auth, "");
3017         if (!auth->domain) {
3018                 status = NT_STATUS_NO_MEMORY;
3019                 goto err_out;
3020         }
3021
3022         status = gse_init_client(auth,
3023                                  (auth_level == DCERPC_AUTH_LEVEL_INTEGRITY),
3024                                  (auth_level == DCERPC_AUTH_LEVEL_PRIVACY),
3025                                  NULL, server, "cifs", username, password,
3026                                  GSS_C_DCE_STYLE, &gse_ctx);
3027         if (!NT_STATUS_IS_OK(status)) {
3028                 DEBUG(0, ("gse_init_client returned %s\n",
3029                           nt_errstr(status)));
3030                 goto err_out;
3031         }
3032         auth->auth_ctx = gse_ctx;
3033
3034         status = rpc_pipe_bind(result, auth);
3035         if (!NT_STATUS_IS_OK(status)) {
3036                 DEBUG(0, ("cli_rpc_pipe_bind failed with error %s\n",
3037                           nt_errstr(status)));
3038                 goto err_out;
3039         }
3040
3041         *presult = result;
3042         return NT_STATUS_OK;
3043
3044 err_out:
3045         TALLOC_FREE(result);
3046         return status;
3047 }
3048
3049 NTSTATUS cli_rpc_pipe_open_spnego_krb5(struct cli_state *cli,
3050                                         const struct ndr_syntax_id *interface,
3051                                         enum dcerpc_transport_t transport,
3052                                         enum dcerpc_AuthLevel auth_level,
3053                                         const char *server,
3054                                         const char *username,
3055                                         const char *password,
3056                                         struct rpc_pipe_client **presult)
3057 {
3058         struct rpc_pipe_client *result;
3059         struct pipe_auth_data *auth;
3060         struct spnego_context *spnego_ctx;
3061         NTSTATUS status;
3062
3063         status = cli_rpc_pipe_open(cli, transport, interface, &result);
3064         if (!NT_STATUS_IS_OK(status)) {
3065                 return status;
3066         }
3067
3068         auth = talloc(result, struct pipe_auth_data);
3069         if (auth == NULL) {
3070                 status = NT_STATUS_NO_MEMORY;
3071                 goto err_out;
3072         }
3073         auth->auth_type = DCERPC_AUTH_TYPE_SPNEGO;
3074         auth->auth_level = auth_level;
3075
3076         if (!username) {
3077                 username = "";
3078         }
3079         auth->user_name = talloc_strdup(auth, username);
3080         if (!auth->user_name) {
3081                 status = NT_STATUS_NO_MEMORY;
3082                 goto err_out;
3083         }
3084
3085         /* Fixme, should we fetch/set the Realm ? */
3086         auth->domain = talloc_strdup(auth, "");
3087         if (!auth->domain) {
3088                 status = NT_STATUS_NO_MEMORY;
3089                 goto err_out;
3090         }
3091
3092         status = spnego_gssapi_init_client(auth,
3093                                            (auth->auth_level ==
3094                                                 DCERPC_AUTH_LEVEL_INTEGRITY),
3095                                            (auth->auth_level ==
3096                                                 DCERPC_AUTH_LEVEL_PRIVACY),
3097                                            true,
3098                                            NULL, server, "cifs",
3099                                            username, password,
3100                                            &spnego_ctx);
3101         if (!NT_STATUS_IS_OK(status)) {
3102                 DEBUG(0, ("spnego_init_client returned %s\n",
3103                           nt_errstr(status)));
3104                 goto err_out;
3105         }
3106         auth->auth_ctx = spnego_ctx;
3107
3108         status = rpc_pipe_bind(result, auth);
3109         if (!NT_STATUS_IS_OK(status)) {
3110                 DEBUG(0, ("cli_rpc_pipe_bind failed with error %s\n",
3111                           nt_errstr(status)));
3112                 goto err_out;
3113         }
3114
3115         *presult = result;
3116         return NT_STATUS_OK;
3117
3118 err_out:
3119         TALLOC_FREE(result);
3120         return status;
3121 }
3122
3123 NTSTATUS cli_rpc_pipe_open_spnego_ntlmssp(struct cli_state *cli,
3124                                           const struct ndr_syntax_id *interface,
3125                                           enum dcerpc_transport_t transport,
3126                                           enum dcerpc_AuthLevel auth_level,
3127                                           const char *domain,
3128                                           const char *username,
3129                                           const char *password,
3130                                           struct rpc_pipe_client **presult)
3131 {
3132         struct rpc_pipe_client *result;
3133         struct pipe_auth_data *auth;
3134         struct spnego_context *spnego_ctx;
3135         NTSTATUS status;
3136
3137         status = cli_rpc_pipe_open(cli, transport, interface, &result);
3138         if (!NT_STATUS_IS_OK(status)) {
3139                 return status;
3140         }
3141
3142         auth = talloc(result, struct pipe_auth_data);
3143         if (auth == NULL) {
3144                 status = NT_STATUS_NO_MEMORY;
3145                 goto err_out;
3146         }
3147         auth->auth_type = DCERPC_AUTH_TYPE_SPNEGO;
3148         auth->auth_level = auth_level;
3149
3150         if (!username) {
3151                 username = "";
3152         }
3153         auth->user_name = talloc_strdup(auth, username);
3154         if (!auth->user_name) {
3155                 status = NT_STATUS_NO_MEMORY;
3156                 goto err_out;
3157         }
3158
3159         if (!domain) {
3160                 domain = "";
3161         }
3162         auth->domain = talloc_strdup(auth, domain);
3163         if (!auth->domain) {
3164                 status = NT_STATUS_NO_MEMORY;
3165                 goto err_out;
3166         }
3167
3168         status = spnego_ntlmssp_init_client(auth,
3169                                             (auth->auth_level ==
3170                                                 DCERPC_AUTH_LEVEL_INTEGRITY),
3171                                             (auth->auth_level ==
3172                                                 DCERPC_AUTH_LEVEL_PRIVACY),
3173                                             true,
3174                                             domain, username, password,
3175                                             &spnego_ctx);
3176         if (!NT_STATUS_IS_OK(status)) {
3177                 DEBUG(0, ("spnego_init_client returned %s\n",
3178                           nt_errstr(status)));
3179                 goto err_out;
3180         }
3181         auth->auth_ctx = spnego_ctx;
3182
3183         status = rpc_pipe_bind(result, auth);
3184         if (!NT_STATUS_IS_OK(status)) {
3185                 DEBUG(0, ("cli_rpc_pipe_bind failed with error %s\n",
3186                           nt_errstr(status)));
3187                 goto err_out;
3188         }
3189
3190         *presult = result;
3191         return NT_STATUS_OK;
3192
3193 err_out:
3194         TALLOC_FREE(result);
3195         return status;
3196 }
3197
3198 NTSTATUS cli_get_session_key(TALLOC_CTX *mem_ctx,
3199                              struct rpc_pipe_client *cli,
3200                              DATA_BLOB *session_key)
3201 {
3202         NTSTATUS status;
3203         struct pipe_auth_data *a;
3204         struct schannel_state *schannel_auth;
3205         struct gensec_security *gensec_security;
3206         struct spnego_context *spnego_ctx;
3207         struct gse_context *gse_ctx;
3208         DATA_BLOB sk = data_blob_null;
3209         bool make_dup = false;
3210
3211         if (!session_key || !cli) {
3212                 return NT_STATUS_INVALID_PARAMETER;
3213         }
3214
3215         a = cli->auth;
3216
3217         if (a == NULL) {
3218                 return NT_STATUS_INVALID_PARAMETER;
3219         }
3220
3221         switch (cli->auth->auth_type) {
3222         case DCERPC_AUTH_TYPE_SCHANNEL:
3223                 schannel_auth = talloc_get_type_abort(a->auth_ctx,
3224                                                       struct schannel_state);
3225                 sk = data_blob_const(schannel_auth->creds->session_key, 16);
3226                 make_dup = true;
3227                 break;
3228         case DCERPC_AUTH_TYPE_SPNEGO:
3229                 spnego_ctx = talloc_get_type_abort(a->auth_ctx,
3230                                                    struct spnego_context);
3231                 sk = spnego_get_session_key(mem_ctx, spnego_ctx);
3232                 make_dup = false;
3233                 break;
3234         case DCERPC_AUTH_TYPE_NTLMSSP:
3235                 gensec_security = talloc_get_type_abort(a->auth_ctx,
3236                                                 struct gensec_security);
3237                 status = gensec_session_key(gensec_security, mem_ctx, &sk);
3238                 if (!NT_STATUS_IS_OK(status)) {
3239                         return status;
3240                 }
3241                 make_dup = false;
3242                 break;
3243         case DCERPC_AUTH_TYPE_KRB5:
3244                 gse_ctx = talloc_get_type_abort(a->auth_ctx,
3245                                                 struct gse_context);
3246                 sk = gse_get_session_key(mem_ctx, gse_ctx);
3247                 make_dup = false;
3248                 break;
3249         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
3250         case DCERPC_AUTH_TYPE_NONE:
3251                 sk = data_blob_const(a->user_session_key.data,
3252                                      a->user_session_key.length);
3253                 make_dup = true;
3254                 break;
3255         default:
3256                 break;
3257         }
3258
3259         if (!sk.data) {
3260                 return NT_STATUS_NO_USER_SESSION_KEY;
3261         }
3262
3263         if (make_dup) {
3264                 *session_key = data_blob_dup_talloc(mem_ctx, sk);
3265         } else {
3266                 *session_key = sk;
3267         }
3268
3269         return NT_STATUS_OK;
3270 }