source3/rpc_server/srv_pipe.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Almost completely rewritten by (C) Jeremy Allison 2005 - 2010
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /*  this module apparently provides an implementation of DCE/RPC over a
  21  *  named pipe (IPC$ connection using SMBtrans).  details of DCE/RPC
  22  *  documentation are available (in on-line form) from the X-Open group.
  23  *
  24  *  this module should provide a level of abstraction between SMB
  25  *  and DCE/RPC, while minimising the amount of mallocs, unnecessary
  26  *  data copies, and network traffic.
  27  *
  28  */
  29
  30 #include "includes.h"
  31 #include "../librpc/gen_ndr/ndr_schannel.h"
  32 #include "../libcli/auth/schannel.h"
  33 #include "../libcli/auth/spnego.h"
  34 #include "ntlmssp.h"
  35
  36 #undef DBGC_CLASS
  37 #define DBGC_CLASS DBGC_RPC_SRV
  38
  39 static void free_pipe_ntlmssp_auth_data(struct pipe_auth_data *auth)
  40 {
  41         AUTH_NTLMSSP_STATE *a = auth->a_u.auth_ntlmssp_state;
  42
  43         if (a) {
  44                 auth_ntlmssp_end(&a);
  45         }
  46         auth->a_u.auth_ntlmssp_state = NULL;
  47 }
  48
  49 static DATA_BLOB generic_session_key(void)
  50 {
  51         return data_blob("SystemLibraryDTC", 16);
  52 }
  53
  54 /*******************************************************************
  55  Generate the next PDU to be returned from the data in p->rdata.
  56  Handle NTLMSSP.
  57  ********************************************************************/
  58
  59 static bool create_next_pdu_ntlmssp(pipes_struct *p)
  60 {
  61         RPC_HDR_RESP hdr_resp;
  62         uint32 ss_padding_len = 0;
  63         uint32 data_space_available;
  64         uint32 data_len_left;
  65         uint32 data_len;
  66         NTSTATUS status;
  67         DATA_BLOB auth_blob;
  68         RPC_HDR_AUTH auth_info;
  69         uint8 auth_type, auth_level;
  70         AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
  71
  72         /*
  73          * If we're in the fault state, keep returning fault PDU's until
  74          * the pipe gets closed. JRA.
  75          */
  76
  77         if(p->fault_state) {
  78                 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
  79                 return True;
  80         }
  81
  82         memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
  83
  84         /* Change the incoming request header to a response. */
  85         p->hdr.pkt_type = DCERPC_PKT_RESPONSE;
  86
  87         /* Set up rpc header flags. */
  88         if (p->out_data.data_sent_length == 0) {
  89                 p->hdr.flags = DCERPC_PFC_FLAG_FIRST;
  90         } else {
  91                 p->hdr.flags = 0;
  92         }
  93
  94         /*
  95          * Work out how much we can fit in a single PDU.
  96          */
  97
  98         data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
  99
 100         /*
 101          * Ensure there really is data left to send.
 102          */
 103
 104         if(!data_len_left) {
 105                 DEBUG(0,("create_next_pdu_ntlmssp: no data left to send !\n"));
 106                 return False;
 107         }
 108
 109         /* Space available - not including padding. */
 110         data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN -
 111                 RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - NTLMSSP_SIG_SIZE;
 112
 113         /*
 114          * The amount we send is the minimum of the available
 115          * space and the amount left to send.
 116          */
 117
 118         data_len = MIN(data_len_left, data_space_available);
 119
 120         /* Work out any padding alignment requirements. */
 121         if ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE) {
 122                 ss_padding_len = SERVER_NDR_PADDING_SIZE -
 123                         ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE);
 124                 DEBUG(10,("create_next_pdu_ntlmssp: adding sign/seal padding of %u\n",
 125                         ss_padding_len ));
 126                 /* If we're over filling the packet, we need to make space
 127                  * for the padding at the end of the data. */
 128                 if (data_len + ss_padding_len > data_space_available) {
 129                         data_len -= SERVER_NDR_PADDING_SIZE;
 130                 }
 131         }
 132
 133         /*
 134          * Set up the alloc hint. This should be the data left to
 135          * send.
 136          */
 137
 138         hdr_resp.alloc_hint = data_len_left;
 139
 140         /*
 141          * Work out if this PDU will be the last.
 142          */
 143
 144         if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
 145                 p->hdr.flags |= DCERPC_PFC_FLAG_LAST;
 146         }
 147
 148         /*
 149          * Set up the header lengths.
 150          */
 151
 152         p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN +
 153                         data_len + ss_padding_len +
 154                         RPC_HDR_AUTH_LEN + NTLMSSP_SIG_SIZE;
 155         p->hdr.auth_len = NTLMSSP_SIG_SIZE;
 156
 157
 158         /*
 159          * Init the parse struct to point at the outgoing
 160          * data.
 161          */
 162
 163         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
 164
 165         /* Store the header in the data stream. */
 166         if(!smb_io_rpc_hdr("hdr", &p->hdr, &p->out_data.frag, 0)) {
 167                 DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR.\n"));
 168                 prs_mem_free(&p->out_data.frag);
 169                 return False;
 170         }
 171
 172         if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
 173                 DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR_RESP.\n"));
 174                 prs_mem_free(&p->out_data.frag);
 175                 return False;
 176         }
 177
 178         /* Copy the data into the PDU. */
 179
 180         if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
 181                                      p->out_data.data_sent_length, data_len)) {
 182                 DEBUG(0,("create_next_pdu_ntlmssp: failed to copy %u bytes of data.\n", (unsigned int)data_len));
 183                 prs_mem_free(&p->out_data.frag);
 184                 return False;
 185         }
 186
 187         /* Copy the sign/seal padding data. */
 188         if (ss_padding_len) {
 189                 char pad[SERVER_NDR_PADDING_SIZE];
 190
 191                 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
 192                 if (!prs_copy_data_in(&p->out_data.frag, pad,
 193                                       ss_padding_len)) {
 194                         DEBUG(0,("create_next_pdu_ntlmssp: failed to add %u bytes of pad data.\n",
 195                                         (unsigned int)ss_padding_len));
 196                         prs_mem_free(&p->out_data.frag);
 197                         return False;
 198                 }
 199         }
 200
 201
 202         /* Now write out the auth header and null blob. */
 203         if (p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) {
 204                 auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
 205         } else {
 206                 auth_type = DCERPC_AUTH_TYPE_SPNEGO;
 207         }
 208         if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
 209                 auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
 210         } else {
 211                 auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
 212         }
 213
 214         init_rpc_hdr_auth(&auth_info, auth_type, auth_level, ss_padding_len, 1 /* context id. */);
 215
 216         if (!smb_io_rpc_hdr_auth("hdr_auth", &auth_info,
 217                                 &p->out_data.frag, 0)) {
 218                 DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR_AUTH.\n"));
 219                 prs_mem_free(&p->out_data.frag);
 220                 return False;
 221         }
 222
 223         /* Generate the sign blob. */
 224
 225         switch (p->auth.auth_level) {
 226                 case DCERPC_AUTH_LEVEL_PRIVACY:
 227                         /* Data portion is encrypted. */
 228                         status = ntlmssp_seal_packet(
 229                                 a->ntlmssp_state,
 230                                 (uint8_t *)prs_data_p(&p->out_data.frag)
 231                                 + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
 232                                 data_len + ss_padding_len,
 233                                 (unsigned char *)prs_data_p(&p->out_data.frag),
 234                                 (size_t)prs_offset(&p->out_data.frag),
 235                                 &auth_blob);
 236                         if (!NT_STATUS_IS_OK(status)) {
 237                                 data_blob_free(&auth_blob);
 238                                 prs_mem_free(&p->out_data.frag);
 239                                 return False;
 240                         }
 241                         break;
 242                 case DCERPC_AUTH_LEVEL_INTEGRITY:
 243                         /* Data is signed. */
 244                         status = ntlmssp_sign_packet(
 245                                 a->ntlmssp_state,
 246                                 (unsigned char *)prs_data_p(&p->out_data.frag)
 247                                 + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
 248                                 data_len + ss_padding_len,
 249                                 (unsigned char *)prs_data_p(&p->out_data.frag),
 250                                 (size_t)prs_offset(&p->out_data.frag),
 251                                 &auth_blob);
 252                         if (!NT_STATUS_IS_OK(status)) {
 253                                 data_blob_free(&auth_blob);
 254                                 prs_mem_free(&p->out_data.frag);
 255                                 return False;
 256                         }
 257                         break;
 258                 default:
 259                         prs_mem_free(&p->out_data.frag);
 260                         return False;
 261         }
 262
 263         /* Append the auth blob. */
 264         if (!prs_copy_data_in(&p->out_data.frag, (char *)auth_blob.data,
 265                               NTLMSSP_SIG_SIZE)) {
 266                 DEBUG(0,("create_next_pdu_ntlmssp: failed to add %u bytes auth blob.\n",
 267                                 (unsigned int)NTLMSSP_SIG_SIZE));
 268                 data_blob_free(&auth_blob);
 269                 prs_mem_free(&p->out_data.frag);
 270                 return False;
 271         }
 272
 273         data_blob_free(&auth_blob);
 274
 275         /*
 276          * Setup the counts for this PDU.
 277          */
 278
 279         p->out_data.data_sent_length += data_len;
 280         p->out_data.current_pdu_sent = 0;
 281
 282         return True;
 283 }
 284
 285 /*******************************************************************
 286  Generate the next PDU to be returned from the data in p->rdata.
 287  Return an schannel authenticated fragment.
 288  ********************************************************************/
 289
 290 static bool create_next_pdu_schannel(pipes_struct *p)
 291 {
 292         RPC_HDR_RESP hdr_resp;
 293         uint32 ss_padding_len = 0;
 294         uint32 data_len;
 295         uint32 data_space_available;
 296         uint32 data_len_left;
 297         uint32 data_pos;
 298         NTSTATUS status;
 299
 300         /*
 301          * If we're in the fault state, keep returning fault PDU's until
 302          * the pipe gets closed. JRA.
 303          */
 304
 305         if(p->fault_state) {
 306                 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
 307                 return True;
 308         }
 309
 310         memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
 311
 312         /* Change the incoming request header to a response. */
 313         p->hdr.pkt_type = DCERPC_PKT_RESPONSE;
 314
 315         /* Set up rpc header flags. */
 316         if (p->out_data.data_sent_length == 0) {
 317                 p->hdr.flags = DCERPC_PFC_FLAG_FIRST;
 318         } else {
 319                 p->hdr.flags = 0;
 320         }
 321
 322         /*
 323          * Work out how much we can fit in a single PDU.
 324          */
 325
 326         data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
 327
 328         /*
 329          * Ensure there really is data left to send.
 330          */
 331
 332         if(!data_len_left) {
 333                 DEBUG(0,("create_next_pdu_schannel: no data left to send !\n"));
 334                 return False;
 335         }
 336
 337         /* Space available - not including padding. */
 338         data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
 339                 - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN
 340                 - RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
 341
 342         /*
 343          * The amount we send is the minimum of the available
 344          * space and the amount left to send.
 345          */
 346
 347         data_len = MIN(data_len_left, data_space_available);
 348
 349         /* Work out any padding alignment requirements. */
 350         if ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE) {
 351                 ss_padding_len = SERVER_NDR_PADDING_SIZE -
 352                         ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE);
 353                 DEBUG(10,("create_next_pdu_schannel: adding sign/seal padding of %u\n",
 354                         ss_padding_len ));
 355                 /* If we're over filling the packet, we need to make space
 356                  * for the padding at the end of the data. */
 357                 if (data_len + ss_padding_len > data_space_available) {
 358                         data_len -= SERVER_NDR_PADDING_SIZE;
 359                 }
 360         }
 361
 362         /*
 363          * Set up the alloc hint. This should be the data left to
 364          * send.
 365          */
 366
 367         hdr_resp.alloc_hint = data_len_left;
 368
 369         /*
 370          * Work out if this PDU will be the last.
 371          */
 372
 373         if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
 374                 p->hdr.flags |= DCERPC_PFC_FLAG_LAST;
 375         }
 376
 377         p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len + ss_padding_len +
 378                                 RPC_HDR_AUTH_LEN + RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
 379         p->hdr.auth_len = RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
 380
 381         /*
 382          * Init the parse struct to point at the outgoing
 383          * data.
 384          */
 385
 386         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
 387
 388         /* Store the header in the data stream. */
 389         if(!smb_io_rpc_hdr("hdr", &p->hdr, &p->out_data.frag, 0)) {
 390                 DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR.\n"));
 391                 prs_mem_free(&p->out_data.frag);
 392                 return False;
 393         }
 394
 395         if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
 396                 DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR_RESP.\n"));
 397                 prs_mem_free(&p->out_data.frag);
 398                 return False;
 399         }
 400
 401         /* Store the current offset. */
 402         data_pos = prs_offset(&p->out_data.frag);
 403
 404         /* Copy the data into the PDU. */
 405
 406         if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
 407                                      p->out_data.data_sent_length, data_len)) {
 408                 DEBUG(0,("create_next_pdu_schannel: failed to copy %u bytes of data.\n", (unsigned int)data_len));
 409                 prs_mem_free(&p->out_data.frag);
 410                 return False;
 411         }
 412
 413         /* Copy the sign/seal padding data. */
 414         if (ss_padding_len) {
 415                 char pad[SERVER_NDR_PADDING_SIZE];
 416                 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
 417                 if (!prs_copy_data_in(&p->out_data.frag, pad,
 418                                       ss_padding_len)) {
 419                         DEBUG(0,("create_next_pdu_schannel: failed to add %u bytes of pad data.\n", (unsigned int)ss_padding_len));
 420                         prs_mem_free(&p->out_data.frag);
 421                         return False;
 422                 }
 423         }
 424
 425         {
 426                 /*
 427                  * Schannel processing.
 428                  */
 429                 RPC_HDR_AUTH auth_info;
 430                 DATA_BLOB blob;
 431                 uint8_t *data;
 432
 433                 /* Check it's the type of reply we were expecting to decode */
 434
 435                 init_rpc_hdr_auth(&auth_info,
 436                                 DCERPC_AUTH_TYPE_SCHANNEL,
 437                                 p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY ?
 438                                         DCERPC_AUTH_LEVEL_PRIVACY : DCERPC_AUTH_LEVEL_INTEGRITY,
 439                                 ss_padding_len, 1);
 440
 441                 if (!smb_io_rpc_hdr_auth("hdr_auth", &auth_info,
 442                                         &p->out_data.frag, 0)) {
 443                         DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR_AUTH.\n"));
 444                         prs_mem_free(&p->out_data.frag);
 445                         return False;
 446                 }
 447
 448                 data = (uint8_t *)prs_data_p(&p->out_data.frag) + data_pos;
 449
 450                 switch (p->auth.auth_level) {
 451                 case DCERPC_AUTH_LEVEL_PRIVACY:
 452                         status = netsec_outgoing_packet(p->auth.a_u.schannel_auth,
 453                                                         talloc_tos(),
 454                                                         true,
 455                                                         data,
 456                                                         data_len + ss_padding_len,
 457                                                         &blob);
 458                         break;
 459                 case DCERPC_AUTH_LEVEL_INTEGRITY:
 460                         status = netsec_outgoing_packet(p->auth.a_u.schannel_auth,
 461                                                         talloc_tos(),
 462                                                         false,
 463                                                         data,
 464                                                         data_len + ss_padding_len,
 465                                                         &blob);
 466                         break;
 467                 default:
 468                         status = NT_STATUS_INTERNAL_ERROR;
 469                         break;
 470                 }
 471
 472                 if (!NT_STATUS_IS_OK(status)) {
 473                         DEBUG(0,("create_next_pdu_schannel: failed to process packet: %s\n",
 474                                 nt_errstr(status)));
 475                         prs_mem_free(&p->out_data.frag);
 476                         return false;
 477                 }
 478
 479                 /* Finally marshall the blob. */
 480
 481                 if (DEBUGLEVEL >= 10) {
 482                         dump_NL_AUTH_SIGNATURE(talloc_tos(), &blob);
 483                 }
 484
 485                 if (!prs_copy_data_in(&p->out_data.frag, (const char *)blob.data, blob.length)) {
 486                         prs_mem_free(&p->out_data.frag);
 487                         return false;
 488                 }
 489         }
 490
 491         /*
 492          * Setup the counts for this PDU.
 493          */
 494
 495         p->out_data.data_sent_length += data_len;
 496         p->out_data.current_pdu_sent = 0;
 497
 498         return True;
 499 }
 500
 501 /*******************************************************************
 502  Generate the next PDU to be returned from the data in p->rdata.
 503  No authentication done.
 504 ********************************************************************/
 505
 506 static bool create_next_pdu_noauth(pipes_struct *p)
 507 {
 508         RPC_HDR_RESP hdr_resp;
 509         uint32 data_len;
 510         uint32 data_space_available;
 511         uint32 data_len_left;
 512
 513         /*
 514          * If we're in the fault state, keep returning fault PDU's until
 515          * the pipe gets closed. JRA.
 516          */
 517
 518         if(p->fault_state) {
 519                 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
 520                 return True;
 521         }
 522
 523         memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
 524
 525         /* Change the incoming request header to a response. */
 526         p->hdr.pkt_type = DCERPC_PKT_RESPONSE;
 527
 528         /* Set up rpc header flags. */
 529         if (p->out_data.data_sent_length == 0) {
 530                 p->hdr.flags = DCERPC_PFC_FLAG_FIRST;
 531         } else {
 532                 p->hdr.flags = 0;
 533         }
 534
 535         /*
 536          * Work out how much we can fit in a single PDU.
 537          */
 538
 539         data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
 540
 541         /*
 542          * Ensure there really is data left to send.
 543          */
 544
 545         if(!data_len_left) {
 546                 DEBUG(0,("create_next_pdu_noath: no data left to send !\n"));
 547                 return False;
 548         }
 549
 550         data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
 551                 - RPC_HDR_RESP_LEN;
 552
 553         /*
 554          * The amount we send is the minimum of the available
 555          * space and the amount left to send.
 556          */
 557
 558         data_len = MIN(data_len_left, data_space_available);
 559
 560         /*
 561          * Set up the alloc hint. This should be the data left to
 562          * send.
 563          */
 564
 565         hdr_resp.alloc_hint = data_len_left;
 566
 567         /*
 568          * Work out if this PDU will be the last.
 569          */
 570
 571         if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
 572                 p->hdr.flags |= DCERPC_PFC_FLAG_LAST;
 573         }
 574
 575         /*
 576          * Set up the header lengths.
 577          */
 578
 579         p->hdr.frag_len = RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len;
 580         p->hdr.auth_len = 0;
 581
 582         /*
 583          * Init the parse struct to point at the outgoing
 584          * data.
 585          */
 586
 587         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
 588
 589         /* Store the header in the data stream. */
 590         if(!smb_io_rpc_hdr("hdr", &p->hdr, &p->out_data.frag, 0)) {
 591                 DEBUG(0,("create_next_pdu_noath: failed to marshall RPC_HDR.\n"));
 592                 prs_mem_free(&p->out_data.frag);
 593                 return False;
 594         }
 595
 596         if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
 597                 DEBUG(0,("create_next_pdu_noath: failed to marshall RPC_HDR_RESP.\n"));
 598                 prs_mem_free(&p->out_data.frag);
 599                 return False;
 600         }
 601
 602         /* Copy the data into the PDU. */
 603
 604         if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
 605                                      p->out_data.data_sent_length, data_len)) {
 606                 DEBUG(0,("create_next_pdu_noauth: failed to copy %u bytes of data.\n", (unsigned int)data_len));
 607                 prs_mem_free(&p->out_data.frag);
 608                 return False;
 609         }
 610
 611         /*
 612          * Setup the counts for this PDU.
 613          */
 614
 615         p->out_data.data_sent_length += data_len;
 616         p->out_data.current_pdu_sent = 0;
 617
 618         return True;
 619 }
 620
 621 /*******************************************************************
 622  Generate the next PDU to be returned from the data in p->rdata.
 623 ********************************************************************/
 624
 625 bool create_next_pdu(pipes_struct *p)
 626 {
 627         switch(p->auth.auth_level) {
 628                 case DCERPC_AUTH_LEVEL_NONE:
 629                 case DCERPC_AUTH_LEVEL_CONNECT:
 630                         /* This is incorrect for auth level connect. Fixme. JRA */
 631                         return create_next_pdu_noauth(p);
 632
 633                 default:
 634                         switch(p->auth.auth_type) {
 635                                 case PIPE_AUTH_TYPE_NTLMSSP:
 636                                 case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
 637                                         return create_next_pdu_ntlmssp(p);
 638                                 case PIPE_AUTH_TYPE_SCHANNEL:
 639                                         return create_next_pdu_schannel(p);
 640                                 default:
 641                                         break;
 642                         }
 643         }
 644
 645         DEBUG(0,("create_next_pdu: invalid internal auth level %u / type %u",
 646                         (unsigned int)p->auth.auth_level,
 647                         (unsigned int)p->auth.auth_type));
 648         return False;
 649 }
 650
 651 /*******************************************************************
 652  Process an NTLMSSP authentication response.
 653  If this function succeeds, the user has been authenticated
 654  and their domain, name and calling workstation stored in
 655  the pipe struct.
 656 *******************************************************************/
 657
 658 static bool pipe_ntlmssp_verify_final(pipes_struct *p, DATA_BLOB *p_resp_blob)
 659 {
 660         DATA_BLOB session_key, reply;
 661         NTSTATUS status;
 662         AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
 663         bool ret;
 664
 665         DEBUG(5,("pipe_ntlmssp_verify_final: pipe %s checking user details\n",
 666                  get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
 667
 668         ZERO_STRUCT(reply);
 669
 670         /* this has to be done as root in order to verify the password */
 671         become_root();
 672         status = auth_ntlmssp_update(a, *p_resp_blob, &reply);
 673         unbecome_root();
 674
 675         /* Don't generate a reply. */
 676         data_blob_free(&reply);
 677
 678         if (!NT_STATUS_IS_OK(status)) {
 679                 return False;
 680         }
 681
 682         /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
 683            ensure the underlying NTLMSSP flags are also set. If not we should
 684            refuse the bind. */
 685
 686         if (p->auth.auth_level == DCERPC_AUTH_LEVEL_INTEGRITY) {
 687                 if (!(a->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
 688                         DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet integrity requested "
 689                                 "but client declined signing.\n",
 690                                  get_pipe_name_from_syntax(talloc_tos(),
 691                                                            &p->syntax)));
 692                         return False;
 693                 }
 694         }
 695         if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
 696                 if (!(a->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
 697                         DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet privacy requested "
 698                                 "but client declined sealing.\n",
 699                                  get_pipe_name_from_syntax(talloc_tos(),
 700                                                            &p->syntax)));
 701                         return False;
 702                 }
 703         }
 704
 705         DEBUG(5, ("pipe_ntlmssp_verify_final: OK: user: %s domain: %s "
 706                   "workstation: %s\n", a->ntlmssp_state->user,
 707                   a->ntlmssp_state->domain,
 708                   a->ntlmssp_state->client.netbios_name));
 709
 710         if (a->server_info->ptok == NULL) {
 711                 DEBUG(1,("Error: Authmodule failed to provide nt_user_token\n"));
 712                 return False;
 713         }
 714
 715         TALLOC_FREE(p->server_info);
 716
 717         p->server_info = copy_serverinfo(p, a->server_info);
 718         if (p->server_info == NULL) {
 719                 DEBUG(0, ("copy_serverinfo failed\n"));
 720                 return false;
 721         }
 722
 723         /*
 724          * We're an authenticated bind over smb, so the session key needs to
 725          * be set to "SystemLibraryDTC". Weird, but this is what Windows
 726          * does. See the RPC-SAMBA3SESSIONKEY.
 727          */
 728
 729         session_key = generic_session_key();
 730         if (session_key.data == NULL) {
 731                 return False;
 732         }
 733
 734         ret = server_info_set_session_key(p->server_info, session_key);
 735
 736         data_blob_free(&session_key);
 737
 738         return True;
 739 }
 740
 741 /*******************************************************************
 742  The switch table for the pipe names and the functions to handle them.
 743 *******************************************************************/
 744
 745 struct rpc_table {
 746         struct {
 747                 const char *clnt;
 748                 const char *srv;
 749         } pipe;
 750         struct ndr_syntax_id rpc_interface;
 751         const struct api_struct *cmds;
 752         int n_cmds;
 753 };
 754
 755 static struct rpc_table *rpc_lookup;
 756 static int rpc_lookup_size;
 757
 758 /*******************************************************************
 759  This is the "stage3" NTLMSSP response after a bind request and reply.
 760 *******************************************************************/
 761
 762 bool api_pipe_bind_auth3(pipes_struct *p, prs_struct *rpc_in_p)
 763 {
 764         RPC_HDR_AUTH auth_info;
 765         uint32 pad = 0;
 766         DATA_BLOB blob;
 767         uint32_t auth_len = p->hdr.auth_len;
 768
 769         ZERO_STRUCT(blob);
 770
 771         DEBUG(5,("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
 772
 773         if (auth_len == 0) {
 774                 DEBUG(0,("api_pipe_bind_auth3: No auth field sent !\n"));
 775                 goto err;
 776         }
 777
 778         /* 4 bytes padding. */
 779         if (!prs_uint32("pad", rpc_in_p, 0, &pad)) {
 780                 DEBUG(0,("api_pipe_bind_auth3: unmarshall of 4 byte pad failed.\n"));
 781                 goto err;
 782         }
 783
 784         /* Ensure there's enough data for an authenticated request. */
 785         if (RPC_HEADER_LEN + RPC_HDR_AUTH_LEN + auth_len >
 786                                 p->hdr.frag_len) {
 787                         DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
 788                                 "%u is too large.\n",
 789                         (unsigned int)auth_len ));
 790                 goto err;
 791         }
 792
 793         /*
 794          * Decode the authentication verifier response.
 795          */
 796
 797         /* Pull the auth header and the following data into a blob. */
 798         /* NB. The offset of the auth_header is relative to the *end*
 799          * of the packet, not the start. Also, the length of the
 800          * data in rpc_in_p is p->hdr.frag_len - RPC_HEADER_LEN,
 801          * as the RPC header isn't included in rpc_in_p. */
 802         if(!prs_set_offset(rpc_in_p,
 803                         p->hdr.frag_len - RPC_HEADER_LEN -
 804                         RPC_HDR_AUTH_LEN - auth_len)) {
 805                 DEBUG(0,("api_pipe_bind_auth3: cannot move "
 806                         "offset to %u.\n",
 807                         (unsigned int)(p->hdr.frag_len -
 808                                 RPC_HDR_AUTH_LEN - auth_len) ));
 809                 goto err;
 810         }
 811
 812         if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, rpc_in_p, 0)) {
 813                 DEBUG(0,("api_pipe_bind_auth3: failed to "
 814                         "unmarshall RPC_HDR_AUTH.\n"));
 815                 goto err;
 816         }
 817
 818         /* We must NEVER look at auth_info->auth_pad_len here,
 819          * as old Samba client code gets it wrong and sends it
 820          * as zero. JRA.
 821          */
 822
 823         if (auth_info.auth_type != DCERPC_AUTH_TYPE_NTLMSSP) {
 824                 DEBUG(0,("api_pipe_bind_auth3: incorrect auth type (%u).\n",
 825                         (unsigned int)auth_info.auth_type ));
 826                 return False;
 827         }
 828
 829         blob = data_blob(NULL,p->hdr.auth_len);
 830
 831         if (!prs_copy_data_out((char *)blob.data, rpc_in_p, p->hdr.auth_len)) {
 832                 DEBUG(0,("api_pipe_bind_auth3: Failed to pull %u bytes - the response blob.\n",
 833                         (unsigned int)p->hdr.auth_len ));
 834                 goto err;
 835         }
 836
 837         /*
 838          * The following call actually checks the challenge/response data.
 839          * for correctness against the given DOMAIN\user name.
 840          */
 841
 842         if (!pipe_ntlmssp_verify_final(p, &blob)) {
 843                 goto err;
 844         }
 845
 846         data_blob_free(&blob);
 847
 848         p->pipe_bound = True;
 849
 850         return True;
 851
 852  err:
 853
 854         data_blob_free(&blob);
 855         free_pipe_ntlmssp_auth_data(&p->auth);
 856         p->auth.a_u.auth_ntlmssp_state = NULL;
 857
 858         return False;
 859 }
 860
 861 /*******************************************************************
 862  Marshall a bind_nak pdu.
 863 *******************************************************************/
 864
 865 static bool setup_bind_nak(pipes_struct *p)
 866 {
 867         RPC_HDR nak_hdr;
 868         uint16 zero = 0;
 869
 870         /* Free any memory in the current return data buffer. */
 871         prs_mem_free(&p->out_data.rdata);
 872
 873         /*
 874          * Marshall directly into the outgoing PDU space. We
 875          * must do this as we need to set to the bind response
 876          * header and are never sending more than one PDU here.
 877          */
 878
 879         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
 880
 881         /*
 882          * Initialize a bind_nak header.
 883          */
 884
 885         init_rpc_hdr(&nak_hdr, DCERPC_PKT_BIND_NAK, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
 886                 p->hdr.call_id, RPC_HEADER_LEN + sizeof(uint16), 0);
 887
 888         /*
 889          * Marshall the header into the outgoing PDU.
 890          */
 891
 892         if(!smb_io_rpc_hdr("", &nak_hdr, &p->out_data.frag, 0)) {
 893                 DEBUG(0,("setup_bind_nak: marshalling of RPC_HDR failed.\n"));
 894                 prs_mem_free(&p->out_data.frag);
 895                 return False;
 896         }
 897
 898         /*
 899          * Now add the reject reason.
 900          */
 901
 902         if(!prs_uint16("reject code", &p->out_data.frag, 0, &zero)) {
 903                 prs_mem_free(&p->out_data.frag);
 904                 return False;
 905         }
 906
 907         p->out_data.data_sent_length = 0;
 908         p->out_data.current_pdu_sent = 0;
 909
 910         if (p->auth.auth_data_free_func) {
 911                 (*p->auth.auth_data_free_func)(&p->auth);
 912         }
 913         p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
 914         p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
 915         p->pipe_bound = False;
 916
 917         return True;
 918 }
 919
 920 /*******************************************************************
 921  Marshall a fault pdu.
 922 *******************************************************************/
 923
 924 bool setup_fault_pdu(pipes_struct *p, NTSTATUS status)
 925 {
 926         RPC_HDR fault_hdr;
 927         RPC_HDR_RESP hdr_resp;
 928         RPC_HDR_FAULT fault_resp;
 929
 930         /* Free any memory in the current return data buffer. */
 931         prs_mem_free(&p->out_data.rdata);
 932
 933         /*
 934          * Marshall directly into the outgoing PDU space. We
 935          * must do this as we need to set to the bind response
 936          * header and are never sending more than one PDU here.
 937          */
 938
 939         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
 940
 941         /*
 942          * Initialize a fault header.
 943          */
 944
 945         init_rpc_hdr(&fault_hdr, DCERPC_PKT_FAULT, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
 946             p->hdr.call_id, RPC_HEADER_LEN + RPC_HDR_RESP_LEN + RPC_HDR_FAULT_LEN, 0);
 947
 948         /*
 949          * Initialize the HDR_RESP and FAULT parts of the PDU.
 950          */
 951
 952         memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
 953
 954         fault_resp.status = status;
 955         fault_resp.reserved = 0;
 956
 957         /*
 958          * Marshall the header into the outgoing PDU.
 959          */
 960
 961         if(!smb_io_rpc_hdr("", &fault_hdr, &p->out_data.frag, 0)) {
 962                 DEBUG(0,("setup_fault_pdu: marshalling of RPC_HDR failed.\n"));
 963                 prs_mem_free(&p->out_data.frag);
 964                 return False;
 965         }
 966
 967         if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
 968                 DEBUG(0,("setup_fault_pdu: failed to marshall RPC_HDR_RESP.\n"));
 969                 prs_mem_free(&p->out_data.frag);
 970                 return False;
 971         }
 972
 973         if(!smb_io_rpc_hdr_fault("fault", &fault_resp, &p->out_data.frag, 0)) {
 974                 DEBUG(0,("setup_fault_pdu: failed to marshall RPC_HDR_FAULT.\n"));
 975                 prs_mem_free(&p->out_data.frag);
 976                 return False;
 977         }
 978
 979         p->out_data.data_sent_length = 0;
 980         p->out_data.current_pdu_sent = 0;
 981
 982         return True;
 983 }
 984
 985 #if 0
 986 /*******************************************************************
 987  Marshall a cancel_ack pdu.
 988  We should probably check the auth-verifier here.
 989 *******************************************************************/
 990
 991 bool setup_cancel_ack_reply(pipes_struct *p, prs_struct *rpc_in_p)
 992 {
 993         prs_struct outgoing_pdu;
 994         RPC_HDR ack_reply_hdr;
 995
 996         /* Free any memory in the current return data buffer. */
 997         prs_mem_free(&p->out_data.rdata);
 998
 999         /*
1000          * Marshall directly into the outgoing PDU space. We
1001          * must do this as we need to set to the bind response
1002          * header and are never sending more than one PDU here.
1003          */
1004
1005         prs_init_empty( &outgoing_pdu, p->mem_ctx, MARSHALL);
1006         prs_give_memory( &outgoing_pdu, (char *)p->out_data.current_pdu, sizeof(p->out_data.current_pdu), False);
1007
1008         /*
1009          * Initialize a cancel_ack header.
1010          */
1011
1012         init_rpc_hdr(&ack_reply_hdr, DCERPC_PKT_CANCEL_ACK, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
1013                         p->hdr.call_id, RPC_HEADER_LEN, 0);
1014
1015         /*
1016          * Marshall the header into the outgoing PDU.
1017          */
1018
1019         if(!smb_io_rpc_hdr("", &ack_reply_hdr, &outgoing_pdu, 0)) {
1020                 DEBUG(0,("setup_cancel_ack_reply: marshalling of RPC_HDR failed.\n"));
1021                 prs_mem_free(&outgoing_pdu);
1022                 return False;
1023         }
1024
1025         p->out_data.data_sent_length = 0;
1026         p->out_data.current_pdu_len = prs_offset(&outgoing_pdu);
1027         p->out_data.current_pdu_sent = 0;
1028
1029         prs_mem_free(&outgoing_pdu);
1030         return True;
1031 }
1032 #endif
1033
1034 /*******************************************************************
1035  Ensure a bind request has the correct abstract & transfer interface.
1036  Used to reject unknown binds from Win2k.
1037 *******************************************************************/
1038
1039 static bool check_bind_req(struct pipes_struct *p,
1040                            struct ndr_syntax_id* abstract,
1041                            struct ndr_syntax_id* transfer,
1042                            uint32 context_id)
1043 {
1044         int i=0;
1045         struct pipe_rpc_fns *context_fns;
1046
1047         DEBUG(3,("check_bind_req for %s\n",
1048                  get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
1049
1050         /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
1051
1052         for (i=0; i<rpc_lookup_size; i++) {
1053                 DEBUGADD(10, ("checking %s\n", rpc_lookup[i].pipe.clnt));
1054                 if (ndr_syntax_id_equal(
1055                             abstract, &rpc_lookup[i].rpc_interface)
1056                     && ndr_syntax_id_equal(
1057                             transfer, &ndr_transfer_syntax)) {
1058                         break;
1059                 }
1060         }
1061
1062         if (i == rpc_lookup_size) {
1063                 return false;
1064         }
1065
1066         context_fns = SMB_MALLOC_P(struct pipe_rpc_fns);
1067         if (context_fns == NULL) {
1068                 DEBUG(0,("check_bind_req: malloc() failed!\n"));
1069                 return False;
1070         }
1071
1072         context_fns->cmds = rpc_lookup[i].cmds;
1073         context_fns->n_cmds = rpc_lookup[i].n_cmds;
1074         context_fns->context_id = context_id;
1075
1076         /* add to the list of open contexts */
1077
1078         DLIST_ADD( p->contexts, context_fns );
1079
1080         return True;
1081 }
1082
1083 /*******************************************************************
1084  Register commands to an RPC pipe
1085 *******************************************************************/
1086
1087 NTSTATUS rpc_srv_register(int version, const char *clnt, const char *srv,
1088                           const struct ndr_interface_table *iface,
1089                           const struct api_struct *cmds, int size)
1090 {
1091         struct rpc_table *rpc_entry;
1092
1093         if (!clnt || !srv || !cmds) {
1094                 return NT_STATUS_INVALID_PARAMETER;
1095         }
1096
1097         if (version != SMB_RPC_INTERFACE_VERSION) {
1098                 DEBUG(0,("Can't register rpc commands!\n"
1099                          "You tried to register a rpc module with SMB_RPC_INTERFACE_VERSION %d"
1100                          ", while this version of samba uses version %d!\n",
1101                          version,SMB_RPC_INTERFACE_VERSION));
1102                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
1103         }
1104
1105         /* TODO:
1106          *
1107          * we still need to make sure that don't register the same commands twice!!!
1108          *
1109          * --metze
1110          */
1111
1112         /* We use a temporary variable because this call can fail and
1113            rpc_lookup will still be valid afterwards.  It could then succeed if
1114            called again later */
1115         rpc_lookup_size++;
1116         rpc_entry = SMB_REALLOC_ARRAY_KEEP_OLD_ON_ERROR(rpc_lookup, struct rpc_table, rpc_lookup_size);
1117         if (NULL == rpc_entry) {
1118                 rpc_lookup_size--;
1119                 DEBUG(0, ("rpc_pipe_register_commands: memory allocation failed\n"));
1120                 return NT_STATUS_NO_MEMORY;
1121         } else {
1122                 rpc_lookup = rpc_entry;
1123         }
1124
1125         rpc_entry = rpc_lookup + (rpc_lookup_size - 1);
1126         ZERO_STRUCTP(rpc_entry);
1127         rpc_entry->pipe.clnt = SMB_STRDUP(clnt);
1128         rpc_entry->pipe.srv = SMB_STRDUP(srv);
1129         rpc_entry->rpc_interface = iface->syntax_id;
1130         rpc_entry->cmds = cmds;
1131         rpc_entry->n_cmds = size;
1132
1133         return NT_STATUS_OK;
1134 }
1135
1136 /**
1137  * Is a named pipe known?
1138  * @param[in] cli_filename      The pipe name requested by the client
1139  * @result                      Do we want to serve this?
1140  */
1141 bool is_known_pipename(const char *cli_filename, struct ndr_syntax_id *syntax)
1142 {
1143         const char *pipename = cli_filename;
1144         int i;
1145         NTSTATUS status;
1146
1147         if (strnequal(pipename, "\\PIPE\\", 6)) {
1148                 pipename += 5;
1149         }
1150
1151         if (*pipename == '\\') {
1152                 pipename += 1;
1153         }
1154
1155         if (lp_disable_spoolss() && strequal(pipename, "spoolss")) {
1156                 DEBUG(10, ("refusing spoolss access\n"));
1157                 return false;
1158         }
1159
1160         for (i=0; i<rpc_lookup_size; i++) {
1161                 if (strequal(pipename, rpc_lookup[i].pipe.clnt)) {
1162                         *syntax = rpc_lookup[i].rpc_interface;
1163                         return true;
1164                 }
1165         }
1166
1167         status = smb_probe_module("rpc", pipename);
1168         if (!NT_STATUS_IS_OK(status)) {
1169                 DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename));
1170                 return false;
1171         }
1172         DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename));
1173
1174         /*
1175          * Scan the list again for the interface id
1176          */
1177
1178         for (i=0; i<rpc_lookup_size; i++) {
1179                 if (strequal(pipename, rpc_lookup[i].pipe.clnt)) {
1180                         *syntax = rpc_lookup[i].rpc_interface;
1181                         return true;
1182                 }
1183         }
1184
1185         DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
1186                    pipename));
1187
1188         return false;
1189 }
1190
1191 /*******************************************************************
1192  Handle a SPNEGO krb5 bind auth.
1193 *******************************************************************/
1194
1195 static bool pipe_spnego_auth_bind_kerberos(pipes_struct *p, prs_struct *rpc_in_p, RPC_HDR_AUTH *pauth_info,
1196                 DATA_BLOB *psecblob, prs_struct *pout_auth)
1197 {
1198         return False;
1199 }
1200
1201 /*******************************************************************
1202  Handle the first part of a SPNEGO bind auth.
1203 *******************************************************************/
1204
1205 static bool pipe_spnego_auth_bind_negotiate(pipes_struct *p, prs_struct *rpc_in_p,
1206                                         uint32_t ss_padding_len,
1207                                         RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
1208 {
1209         DATA_BLOB blob;
1210         DATA_BLOB secblob;
1211         DATA_BLOB response;
1212         DATA_BLOB chal;
1213         char *OIDs[ASN1_MAX_OIDS];
1214         int i;
1215         NTSTATUS status;
1216         bool got_kerberos_mechanism = false;
1217         AUTH_NTLMSSP_STATE *a = NULL;
1218         RPC_HDR_AUTH auth_info;
1219
1220         ZERO_STRUCT(secblob);
1221         ZERO_STRUCT(chal);
1222         ZERO_STRUCT(response);
1223
1224         /* Grab the SPNEGO blob. */
1225         blob = data_blob(NULL,p->hdr.auth_len);
1226
1227         if (!prs_copy_data_out((char *)blob.data, rpc_in_p, p->hdr.auth_len)) {
1228                 DEBUG(0,("pipe_spnego_auth_bind_negotiate: Failed to pull %u bytes - the SPNEGO auth header.\n",
1229                         (unsigned int)p->hdr.auth_len ));
1230                 goto err;
1231         }
1232
1233         if (blob.data[0] != ASN1_APPLICATION(0)) {
1234                 goto err;
1235         }
1236
1237         /* parse out the OIDs and the first sec blob */
1238         if (!parse_negTokenTarg(blob, OIDs, &secblob)) {
1239                 DEBUG(0,("pipe_spnego_auth_bind_negotiate: Failed to parse the security blob.\n"));
1240                 goto err;
1241         }
1242
1243         if (strcmp(OID_KERBEROS5, OIDs[0]) == 0 || strcmp(OID_KERBEROS5_OLD, OIDs[0]) == 0) {
1244                 got_kerberos_mechanism = true;
1245         }
1246
1247         for (i=0;OIDs[i];i++) {
1248                 DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got OID %s\n", OIDs[i]));
1249                 TALLOC_FREE(OIDs[i]);
1250         }
1251         DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got secblob of size %lu\n", (unsigned long)secblob.length));
1252
1253         if ( got_kerberos_mechanism && ((lp_security()==SEC_ADS) || USE_KERBEROS_KEYTAB) ) {
1254                 bool ret = pipe_spnego_auth_bind_kerberos(p, rpc_in_p, pauth_info, &secblob, pout_auth);
1255                 data_blob_free(&secblob);
1256                 data_blob_free(&blob);
1257                 return ret;
1258         }
1259
1260         if (p->auth.auth_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP && p->auth.a_u.auth_ntlmssp_state) {
1261                 /* Free any previous auth type. */
1262                 free_pipe_ntlmssp_auth_data(&p->auth);
1263         }
1264
1265         if (!got_kerberos_mechanism) {
1266                 /* Initialize the NTLM engine. */
1267                 status = auth_ntlmssp_start(&a);
1268                 if (!NT_STATUS_IS_OK(status)) {
1269                         goto err;
1270                 }
1271
1272                 /*
1273                  * Pass the first security blob of data to it.
1274                  * This can return an error or NT_STATUS_MORE_PROCESSING_REQUIRED
1275                  * which means we need another packet to complete the bind.
1276                  */
1277
1278                 status = auth_ntlmssp_update(a, secblob, &chal);
1279
1280                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1281                         DEBUG(3,("pipe_spnego_auth_bind_negotiate: auth_ntlmssp_update failed.\n"));
1282                         goto err;
1283                 }
1284
1285                 /* Generate the response blob we need for step 2 of the bind. */
1286                 response = spnego_gen_auth_response(&chal, status, OID_NTLMSSP);
1287         } else {
1288                 /*
1289                  * SPNEGO negotiate down to NTLMSSP. The subsequent
1290                  * code to process follow-up packets is not complete
1291                  * yet. JRA.
1292                  */
1293                 response = spnego_gen_auth_response(NULL,
1294                                         NT_STATUS_MORE_PROCESSING_REQUIRED,
1295                                         OID_NTLMSSP);
1296         }
1297
1298         /* auth_pad_len will be handled by the caller */
1299
1300         /* Copy the blob into the pout_auth parse struct */
1301         init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_SPNEGO,
1302                         pauth_info->auth_level, ss_padding_len, 1);
1303         if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
1304                 DEBUG(0,("pipe_spnego_auth_bind_negotiate: marshalling of RPC_HDR_AUTH failed.\n"));
1305                 goto err;
1306         }
1307
1308         if (!prs_copy_data_in(pout_auth, (char *)response.data, response.length)) {
1309                 DEBUG(0,("pipe_spnego_auth_bind_negotiate: marshalling of data blob failed.\n"));
1310                 goto err;
1311         }
1312
1313         p->auth.a_u.auth_ntlmssp_state = a;
1314         p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
1315         p->auth.auth_type = PIPE_AUTH_TYPE_SPNEGO_NTLMSSP;
1316
1317         data_blob_free(&blob);
1318         data_blob_free(&secblob);
1319         data_blob_free(&chal);
1320         data_blob_free(&response);
1321
1322         /* We can't set pipe_bound True yet - we need an RPC_ALTER_CONTEXT response packet... */
1323         return True;
1324
1325  err:
1326
1327         data_blob_free(&blob);
1328         data_blob_free(&secblob);
1329         data_blob_free(&chal);
1330         data_blob_free(&response);
1331
1332         p->auth.a_u.auth_ntlmssp_state = NULL;
1333
1334         return False;
1335 }
1336
1337 /*******************************************************************
1338  Handle the second part of a SPNEGO bind auth.
1339 *******************************************************************/
1340
1341 static bool pipe_spnego_auth_bind_continue(pipes_struct *p, prs_struct *rpc_in_p,
1342                                 uint32_t ss_padding_len,
1343                                 RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
1344 {
1345         RPC_HDR_AUTH auth_info;
1346         DATA_BLOB spnego_blob;
1347         DATA_BLOB auth_blob;
1348         DATA_BLOB auth_reply;
1349         DATA_BLOB response;
1350         AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
1351
1352         ZERO_STRUCT(spnego_blob);
1353         ZERO_STRUCT(auth_blob);
1354         ZERO_STRUCT(auth_reply);
1355         ZERO_STRUCT(response);
1356
1357         /*
1358          * NB. If we've negotiated down from krb5 to NTLMSSP we'll currently
1359          * fail here as 'a' == NULL.
1360          */
1361         if (p->auth.auth_type != PIPE_AUTH_TYPE_SPNEGO_NTLMSSP || !a) {
1362                 DEBUG(0,("pipe_spnego_auth_bind_continue: not in NTLMSSP auth state.\n"));
1363                 goto err;
1364         }
1365
1366         /* Grab the SPNEGO blob. */
1367         spnego_blob = data_blob(NULL,p->hdr.auth_len);
1368
1369         if (!prs_copy_data_out((char *)spnego_blob.data, rpc_in_p, p->hdr.auth_len)) {
1370                 DEBUG(0,("pipe_spnego_auth_bind_continue: Failed to pull %u bytes - the SPNEGO auth header.\n",
1371                         (unsigned int)p->hdr.auth_len ));
1372                 goto err;
1373         }
1374
1375         if (spnego_blob.data[0] != ASN1_CONTEXT(1)) {
1376                 DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob type.\n"));
1377                 goto err;
1378         }
1379
1380         if (!spnego_parse_auth(spnego_blob, &auth_blob)) {
1381                 DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob.\n"));
1382                 goto err;
1383         }
1384
1385         /*
1386          * The following call actually checks the challenge/response data.
1387          * for correctness against the given DOMAIN\user name.
1388          */
1389
1390         if (!pipe_ntlmssp_verify_final(p, &auth_blob)) {
1391                 goto err;
1392         }
1393
1394         data_blob_free(&spnego_blob);
1395         data_blob_free(&auth_blob);
1396
1397         /* Generate the spnego "accept completed" blob - no incoming data. */
1398         response = spnego_gen_auth_response(&auth_reply, NT_STATUS_OK, OID_NTLMSSP);
1399
1400         /* FIXME - add auth_pad_len here ! */
1401
1402         /* Copy the blob into the pout_auth parse struct */
1403         init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_SPNEGO,
1404                         pauth_info->auth_level, ss_padding_len, 1);
1405         if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
1406                 DEBUG(0,("pipe_spnego_auth_bind_continue: marshalling of RPC_HDR_AUTH failed.\n"));
1407                 goto err;
1408         }
1409
1410         if (!prs_copy_data_in(pout_auth, (char *)response.data, response.length)) {
1411                 DEBUG(0,("pipe_spnego_auth_bind_continue: marshalling of data blob failed.\n"));
1412                 goto err;
1413         }
1414
1415         data_blob_free(&auth_reply);
1416         data_blob_free(&response);
1417
1418         p->pipe_bound = True;
1419
1420         return True;
1421
1422  err:
1423
1424         data_blob_free(&spnego_blob);
1425         data_blob_free(&auth_blob);
1426         data_blob_free(&auth_reply);
1427         data_blob_free(&response);
1428
1429         free_pipe_ntlmssp_auth_data(&p->auth);
1430         p->auth.a_u.auth_ntlmssp_state = NULL;
1431
1432         return False;
1433 }
1434
1435 /*******************************************************************
1436  Handle an schannel bind auth.
1437 *******************************************************************/
1438
1439 static bool pipe_schannel_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
1440                                         uint32_t ss_padding_len,
1441                                         RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
1442 {
1443         RPC_HDR_AUTH auth_info;
1444         struct NL_AUTH_MESSAGE neg;
1445         struct NL_AUTH_MESSAGE reply;
1446         bool ret;
1447         NTSTATUS status;
1448         struct netlogon_creds_CredentialState *creds;
1449         DATA_BLOB session_key;
1450         enum ndr_err_code ndr_err;
1451         DATA_BLOB blob;
1452
1453         blob = data_blob_const(prs_data_p(rpc_in_p) + prs_offset(rpc_in_p),
1454                                prs_data_size(rpc_in_p));
1455
1456         ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), NULL, &neg,
1457                                (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_MESSAGE);
1458         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1459                 DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
1460                 return false;
1461         }
1462
1463         if (DEBUGLEVEL >= 10) {
1464                 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &neg);
1465         }
1466
1467         if (!(neg.Flags & NL_FLAG_OEM_NETBIOS_COMPUTER_NAME)) {
1468                 DEBUG(0,("pipe_schannel_auth_bind: Did not receive netbios computer name\n"));
1469                 return false;
1470         }
1471
1472         /*
1473          * The neg.oem_netbios_computer.a key here must match the remote computer name
1474          * given in the DOM_CLNT_SRV.uni_comp_name used on all netlogon pipe
1475          * operations that use credentials.
1476          */
1477
1478         become_root();
1479         status = schannel_get_creds_state(p, NULL, lp_private_dir(),
1480                                             neg.oem_netbios_computer.a,
1481                                             &creds);
1482         unbecome_root();
1483
1484         if (!NT_STATUS_IS_OK(status)) {
1485                 DEBUG(0, ("pipe_schannel_auth_bind: Attempt to bind using schannel without successful serverauth2\n"));
1486                 return False;
1487         }
1488
1489         p->auth.a_u.schannel_auth = talloc(p, struct schannel_state);
1490         if (!p->auth.a_u.schannel_auth) {
1491                 TALLOC_FREE(creds);
1492                 return False;
1493         }
1494
1495         p->auth.a_u.schannel_auth->state = SCHANNEL_STATE_START;
1496         p->auth.a_u.schannel_auth->seq_num = 0;
1497         p->auth.a_u.schannel_auth->initiator = false;
1498         p->auth.a_u.schannel_auth->creds = creds;
1499
1500         /*
1501          * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
1502          * here ? We do that for NTLMSSP, but the session key is already set up from the vuser
1503          * struct of the person who opened the pipe. I need to test this further. JRA.
1504          *
1505          * VL. As we are mapping this to guest set the generic key
1506          * "SystemLibraryDTC" key here. It's a bit difficult to test against
1507          * W2k3, as it does not allow schannel binds against SAMR and LSA
1508          * anymore.
1509          */
1510
1511         session_key = generic_session_key();
1512         if (session_key.data == NULL) {
1513                 DEBUG(0, ("pipe_schannel_auth_bind: Could not alloc session"
1514                           " key\n"));
1515                 return false;
1516         }
1517
1518         ret = server_info_set_session_key(p->server_info, session_key);
1519
1520         data_blob_free(&session_key);
1521
1522         if (!ret) {
1523                 DEBUG(0, ("server_info_set_session_key failed\n"));
1524                 return false;
1525         }
1526
1527         init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_SCHANNEL,
1528                         pauth_info->auth_level, ss_padding_len, 1);
1529         if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
1530                 DEBUG(0,("pipe_schannel_auth_bind: marshalling of RPC_HDR_AUTH failed.\n"));
1531                 return False;
1532         }
1533
1534         /*** SCHANNEL verifier ***/
1535
1536         reply.MessageType                       = NL_NEGOTIATE_RESPONSE;
1537         reply.Flags                             = 0;
1538         reply.Buffer.dummy                      = 5; /* ??? actually I don't think
1539                                                       * this has any meaning
1540                                                       * here - gd */
1541
1542         ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), NULL, &reply,
1543                        (ndr_push_flags_fn_t)ndr_push_NL_AUTH_MESSAGE);
1544         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1545                 DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
1546                 return false;
1547         }
1548
1549         if (DEBUGLEVEL >= 10) {
1550                 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &reply);
1551         }
1552
1553         if (!prs_copy_data_in(pout_auth, (const char *)blob.data, blob.length)) {
1554                 return false;
1555         }
1556
1557         DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
1558                 neg.oem_netbios_domain.a, neg.oem_netbios_computer.a));
1559
1560         /* We're finished with this bind - no more packets. */
1561         p->auth.auth_data_free_func = NULL;
1562         p->auth.auth_type = PIPE_AUTH_TYPE_SCHANNEL;
1563
1564         p->pipe_bound = True;
1565
1566         return True;
1567 }
1568
1569 /*******************************************************************
1570  Handle an NTLMSSP bind auth.
1571 *******************************************************************/
1572
1573 static bool pipe_ntlmssp_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
1574                                         uint32_t ss_padding_len,
1575                                         RPC_HDR_AUTH *pauth_info, prs_struct *pout_auth)
1576 {
1577         RPC_HDR_AUTH auth_info;
1578         DATA_BLOB blob;
1579         DATA_BLOB response;
1580         NTSTATUS status;
1581         AUTH_NTLMSSP_STATE *a = NULL;
1582
1583         ZERO_STRUCT(blob);
1584         ZERO_STRUCT(response);
1585
1586         /* Grab the NTLMSSP blob. */
1587         blob = data_blob(NULL,p->hdr.auth_len);
1588
1589         if (!prs_copy_data_out((char *)blob.data, rpc_in_p, p->hdr.auth_len)) {
1590                 DEBUG(0,("pipe_ntlmssp_auth_bind: Failed to pull %u bytes - the NTLM auth header.\n",
1591                         (unsigned int)p->hdr.auth_len ));
1592                 goto err;
1593         }
1594
1595         if (strncmp((char *)blob.data, "NTLMSSP", 7) != 0) {
1596                 DEBUG(0,("pipe_ntlmssp_auth_bind: Failed to read NTLMSSP in blob\n"));
1597                 goto err;
1598         }
1599
1600         /* We have an NTLMSSP blob. */
1601         status = auth_ntlmssp_start(&a);
1602         if (!NT_STATUS_IS_OK(status)) {
1603                 DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_start failed: %s\n",
1604                         nt_errstr(status) ));
1605                 goto err;
1606         }
1607
1608         status = auth_ntlmssp_update(a, blob, &response);
1609         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1610                 DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_update failed: %s\n",
1611                         nt_errstr(status) ));
1612                 goto err;
1613         }
1614
1615         data_blob_free(&blob);
1616
1617         /* Copy the blob into the pout_auth parse struct */
1618         init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_NTLMSSP,
1619                         pauth_info->auth_level, ss_padding_len, 1);
1620         if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
1621                 DEBUG(0,("pipe_ntlmssp_auth_bind: marshalling of RPC_HDR_AUTH failed.\n"));
1622                 goto err;
1623         }
1624
1625         if (!prs_copy_data_in(pout_auth, (char *)response.data, response.length)) {
1626                 DEBUG(0,("pipe_ntlmssp_auth_bind: marshalling of data blob failed.\n"));
1627                 goto err;
1628         }
1629
1630         p->auth.a_u.auth_ntlmssp_state = a;
1631         p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
1632         p->auth.auth_type = PIPE_AUTH_TYPE_NTLMSSP;
1633
1634         data_blob_free(&blob);
1635         data_blob_free(&response);
1636
1637         DEBUG(10,("pipe_ntlmssp_auth_bind: NTLMSSP auth started\n"));
1638
1639         /* We can't set pipe_bound True yet - we need an DCERPC_PKT_AUTH3 response packet... */
1640         return True;
1641
1642   err:
1643
1644         data_blob_free(&blob);
1645         data_blob_free(&response);
1646
1647         free_pipe_ntlmssp_auth_data(&p->auth);
1648         p->auth.a_u.auth_ntlmssp_state = NULL;
1649         return False;
1650 }
1651
1652 /*******************************************************************
1653  Respond to a pipe bind request.
1654 *******************************************************************/
1655
1656 bool api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
1657 {
1658         RPC_HDR_BA hdr_ba;
1659         RPC_HDR_RB hdr_rb;
1660         RPC_HDR_AUTH auth_info;
1661         uint16 assoc_gid;
1662         fstring ack_pipe_name;
1663         prs_struct out_hdr_ba;
1664         prs_struct out_auth;
1665         int i = 0;
1666         int auth_len = 0;
1667         unsigned int auth_type = DCERPC_AUTH_TYPE_NONE;
1668         uint32_t ss_padding_len = 0;
1669
1670         /* No rebinds on a bound pipe - use alter context. */
1671         if (p->pipe_bound) {
1672                 DEBUG(2,("api_pipe_bind_req: rejecting bind request on bound "
1673                          "pipe %s.\n",
1674                          get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
1675                 return setup_bind_nak(p);
1676         }
1677
1678         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
1679
1680         /*
1681          * Marshall directly into the outgoing PDU space. We
1682          * must do this as we need to set to the bind response
1683          * header and are never sending more than one PDU here.
1684          */
1685
1686         /*
1687          * Setup the memory to marshall the ba header, and the
1688          * auth footers.
1689          */
1690
1691         if(!prs_init(&out_hdr_ba, 1024, p->mem_ctx, MARSHALL)) {
1692                 DEBUG(0,("api_pipe_bind_req: malloc out_hdr_ba failed.\n"));
1693                 prs_mem_free(&p->out_data.frag);
1694                 return False;
1695         }
1696
1697         if(!prs_init(&out_auth, 1024, p->mem_ctx, MARSHALL)) {
1698                 DEBUG(0,("api_pipe_bind_req: malloc out_auth failed.\n"));
1699                 prs_mem_free(&p->out_data.frag);
1700                 prs_mem_free(&out_hdr_ba);
1701                 return False;
1702         }
1703
1704         DEBUG(5,("api_pipe_bind_req: decode request. %d\n", __LINE__));
1705
1706         ZERO_STRUCT(hdr_rb);
1707
1708         /* decode the bind request */
1709
1710         if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_in_p, 0))  {
1711                 DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_RB "
1712                          "struct.\n"));
1713                 goto err_exit;
1714         }
1715
1716         if (hdr_rb.num_contexts == 0) {
1717                 DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
1718                 goto err_exit;
1719         }
1720
1721         /*
1722          * Try and find the correct pipe name to ensure
1723          * that this is a pipe name we support.
1724          */
1725
1726         for (i = 0; i < rpc_lookup_size; i++) {
1727                 if (ndr_syntax_id_equal(&rpc_lookup[i].rpc_interface,
1728                                         &hdr_rb.rpc_context[0].abstract)) {
1729                         DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
1730                                 rpc_lookup[i].pipe.clnt, rpc_lookup[i].pipe.srv));
1731                         break;
1732                 }
1733         }
1734
1735         if (i == rpc_lookup_size) {
1736                 NTSTATUS status;
1737
1738                 status = smb_probe_module(
1739                         "rpc", get_pipe_name_from_syntax(
1740                                 talloc_tos(),
1741                                 &hdr_rb.rpc_context[0].abstract));
1742
1743                 if (NT_STATUS_IS_ERR(status)) {
1744                        DEBUG(3,("api_pipe_bind_req: Unknown pipe name %s in bind request.\n",
1745                                 get_pipe_name_from_syntax(
1746                                         talloc_tos(),
1747                                         &hdr_rb.rpc_context[0].abstract)));
1748                         prs_mem_free(&p->out_data.frag);
1749                         prs_mem_free(&out_hdr_ba);
1750                         prs_mem_free(&out_auth);
1751
1752                         return setup_bind_nak(p);
1753                 }
1754
1755                 for (i = 0; i < rpc_lookup_size; i++) {
1756                        if (strequal(rpc_lookup[i].pipe.clnt,
1757                                     get_pipe_name_from_syntax(talloc_tos(),
1758                                                               &p->syntax))) {
1759                                DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
1760                                          rpc_lookup[i].pipe.clnt, rpc_lookup[i].pipe.srv));
1761                                break;
1762                        }
1763                 }
1764
1765                 if (i == rpc_lookup_size) {
1766                         DEBUG(0, ("module %s doesn't provide functions for "
1767                                   "pipe %s!\n",
1768                                   get_pipe_name_from_syntax(talloc_tos(),
1769                                                             &p->syntax),
1770                                   get_pipe_name_from_syntax(talloc_tos(),
1771                                                             &p->syntax)));
1772                         goto err_exit;
1773                 }
1774         }
1775
1776         /* name has to be \PIPE\xxxxx */
1777         fstrcpy(ack_pipe_name, "\\PIPE\\");
1778         fstrcat(ack_pipe_name, rpc_lookup[i].pipe.srv);
1779
1780         DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
1781
1782         assoc_gid = hdr_rb.bba.assoc_gid ? hdr_rb.bba.assoc_gid : 0x53f0;
1783
1784         /*
1785          * Create the bind response struct.
1786          */
1787
1788         /* If the requested abstract synt uuid doesn't match our client pipe,
1789                 reject the bind_ack & set the transfer interface synt to all 0's,
1790                 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1791                 unknown to NT4)
1792                 Needed when adding entries to a DACL from NT5 - SK */
1793
1794         if(check_bind_req(p, &hdr_rb.rpc_context[0].abstract, &hdr_rb.rpc_context[0].transfer[0],
1795                                 hdr_rb.rpc_context[0].context_id )) {
1796                 init_rpc_hdr_ba(&hdr_ba,
1797                         RPC_MAX_PDU_FRAG_LEN,
1798                         RPC_MAX_PDU_FRAG_LEN,
1799                         assoc_gid,
1800                         ack_pipe_name,
1801                         0x1, 0x0, 0x0,
1802                         &hdr_rb.rpc_context[0].transfer[0]);
1803         } else {
1804                 /* Rejection reason: abstract syntax not supported */
1805                 init_rpc_hdr_ba(&hdr_ba, RPC_MAX_PDU_FRAG_LEN,
1806                                         RPC_MAX_PDU_FRAG_LEN, assoc_gid,
1807                                         ack_pipe_name, 0x1, 0x2, 0x1,
1808                                         &null_ndr_syntax_id);
1809                 p->pipe_bound = False;
1810         }
1811
1812         /*
1813          * and marshall it.
1814          */
1815
1816         if(!smb_io_rpc_hdr_ba("", &hdr_ba, &out_hdr_ba, 0)) {
1817                 DEBUG(0,("api_pipe_bind_req: marshalling of RPC_HDR_BA failed.\n"));
1818                 goto err_exit;
1819         }
1820
1821         /*
1822          * Check if this is an authenticated bind request.
1823          */
1824
1825         if (p->hdr.auth_len) {
1826                 /*
1827                  * Decode the authentication verifier.
1828                  */
1829
1830                 /* Work out any padding needed before the auth footer. */
1831                 if ((RPC_HEADER_LEN + prs_offset(&out_hdr_ba)) % SERVER_NDR_PADDING_SIZE) {
1832                         ss_padding_len = SERVER_NDR_PADDING_SIZE -
1833                                 ((RPC_HEADER_LEN + prs_offset(&out_hdr_ba)) % SERVER_NDR_PADDING_SIZE);
1834                         DEBUG(10,("api_pipe_bind_req: auth pad_len = %u\n",
1835                                 (unsigned int)ss_padding_len ));
1836                 }
1837
1838                 /* Quick length check. Won't catch a bad auth footer,
1839                  * prevents overrun. */
1840
1841                 if (p->hdr.frag_len < RPC_HEADER_LEN + RPC_HDR_AUTH_LEN + p->hdr.auth_len) {
1842                         DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
1843                                 "too long for fragment %u.\n",
1844                                 (unsigned int)p->hdr.auth_len,
1845                                 (unsigned int)p->hdr.frag_len ));
1846                         goto err_exit;
1847                 }
1848
1849                 /* Pull the auth header and the following data into a blob. */
1850                 /* NB. The offset of the auth_header is relative to the *end*
1851                  * of the packet, not the start. Also, the length of the
1852                  * data in rpc_in_p is p->hdr.frag_len - RPC_HEADER_LEN,
1853                  * as the RPC header isn't included in rpc_in_p. */
1854                 if(!prs_set_offset(rpc_in_p,
1855                                 p->hdr.frag_len - RPC_HEADER_LEN -
1856                                 RPC_HDR_AUTH_LEN - p->hdr.auth_len)) {
1857                         DEBUG(0,("api_pipe_bind_req: cannot move "
1858                                 "offset to %u.\n",
1859                                 (unsigned int)(p->hdr.frag_len -
1860                                 RPC_HDR_AUTH_LEN - p->hdr.auth_len) ));
1861                         goto err_exit;
1862                 }
1863
1864                 if(!smb_io_rpc_hdr_auth("", &auth_info, rpc_in_p, 0)) {
1865                         DEBUG(0,("api_pipe_bind_req: unable to unmarshall RPC_HDR_AUTH struct.\n"));
1866                         goto err_exit;
1867                 }
1868
1869                 auth_type = auth_info.auth_type;
1870
1871                 /* Work out if we have to sign or seal etc. */
1872                 switch (auth_info.auth_level) {
1873                         case DCERPC_AUTH_LEVEL_INTEGRITY:
1874                                 p->auth.auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
1875                                 break;
1876                         case DCERPC_AUTH_LEVEL_PRIVACY:
1877                                 p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
1878                                 break;
1879                         default:
1880                                 DEBUG(0,("api_pipe_bind_req: unexpected auth level (%u).\n",
1881                                         (unsigned int)auth_info.auth_level ));
1882                                 goto err_exit;
1883                 }
1884         } else {
1885                 ZERO_STRUCT(auth_info);
1886         }
1887
1888         switch(auth_type) {
1889                 case DCERPC_AUTH_TYPE_NTLMSSP:
1890                         if (!pipe_ntlmssp_auth_bind(p, rpc_in_p,
1891                                         ss_padding_len, &auth_info, &out_auth)) {
1892                                 goto err_exit;
1893                         }
1894                         assoc_gid = 0x7a77;
1895                         break;
1896
1897                 case DCERPC_AUTH_TYPE_SCHANNEL:
1898                         if (!pipe_schannel_auth_bind(p, rpc_in_p,
1899                                         ss_padding_len, &auth_info, &out_auth)) {
1900                                 goto err_exit;
1901                         }
1902                         break;
1903
1904                 case DCERPC_AUTH_TYPE_SPNEGO:
1905                         if (!pipe_spnego_auth_bind_negotiate(p, rpc_in_p,
1906                                         ss_padding_len, &auth_info, &out_auth)) {
1907                                 goto err_exit;
1908                         }
1909                         break;
1910
1911                 case DCERPC_AUTH_TYPE_NONE:
1912                         /* Unauthenticated bind request. */
1913                         /* We're finished - no more packets. */
1914                         p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
1915                         /* We must set the pipe auth_level here also. */
1916                         p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
1917                         p->pipe_bound = True;
1918                         /* The session key was initialized from the SMB
1919                          * session in make_internal_rpc_pipe_p */
1920                         ss_padding_len = 0;
1921                         break;
1922
1923                 default:
1924                         DEBUG(0,("api_pipe_bind_req: unknown auth type %x requested.\n", auth_type ));
1925                         goto err_exit;
1926         }
1927         /*
1928          * Create the header, now we know the length.
1929          */
1930
1931         if (prs_offset(&out_auth)) {
1932                 auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
1933         }
1934
1935         init_rpc_hdr(&p->hdr, DCERPC_PKT_BIND_ACK, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
1936                         p->hdr.call_id,
1937                         RPC_HEADER_LEN + prs_offset(&out_hdr_ba) +
1938                                 ss_padding_len + prs_offset(&out_auth),
1939                         auth_len);
1940
1941         /*
1942          * Marshall the header into the outgoing PDU.
1943          */
1944
1945         if(!smb_io_rpc_hdr("", &p->hdr, &p->out_data.frag, 0)) {
1946                 DEBUG(0,("api_pipe_bind_req: marshalling of RPC_HDR failed.\n"));
1947                 goto err_exit;
1948         }
1949
1950         /*
1951          * Now add the RPC_HDR_BA and any auth needed.
1952          */
1953
1954         if(!prs_append_prs_data(&p->out_data.frag, &out_hdr_ba)) {
1955                 DEBUG(0,("api_pipe_bind_req: append of RPC_HDR_BA failed.\n"));
1956                 goto err_exit;
1957         }
1958
1959         if (auth_len) {
1960                 if (ss_padding_len) {
1961                         char pad[SERVER_NDR_PADDING_SIZE];
1962                         memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
1963                         if (!prs_copy_data_in(&p->out_data.frag, pad,
1964                                         ss_padding_len)) {
1965                                 DEBUG(0,("api_pipe_bind_req: failed to add %u "
1966                                         "bytes of pad data.\n",
1967                                         (unsigned int)ss_padding_len));
1968                                 goto err_exit;
1969                         }
1970                 }
1971
1972                 if (!prs_append_prs_data( &p->out_data.frag, &out_auth)) {
1973                         DEBUG(0,("api_pipe_bind_req: append of auth info failed.\n"));
1974                         goto err_exit;
1975                 }
1976         }
1977
1978         /*
1979          * Setup the lengths for the initial reply.
1980          */
1981
1982         p->out_data.data_sent_length = 0;
1983         p->out_data.current_pdu_sent = 0;
1984
1985         prs_mem_free(&out_hdr_ba);
1986         prs_mem_free(&out_auth);
1987
1988         return True;
1989
1990   err_exit:
1991
1992         prs_mem_free(&p->out_data.frag);
1993         prs_mem_free(&out_hdr_ba);
1994         prs_mem_free(&out_auth);
1995         return setup_bind_nak(p);
1996 }
1997
1998 /****************************************************************************
1999  Deal with an alter context call. Can be third part of 3 leg auth request for
2000  SPNEGO calls.
2001 ****************************************************************************/
2002
2003 bool api_pipe_alter_context(pipes_struct *p, prs_struct *rpc_in_p)
2004 {
2005         RPC_HDR_BA hdr_ba;
2006         RPC_HDR_RB hdr_rb;
2007         RPC_HDR_AUTH auth_info;
2008         uint16 assoc_gid;
2009         fstring ack_pipe_name;
2010         prs_struct out_hdr_ba;
2011         prs_struct out_auth;
2012         int auth_len = 0;
2013         uint32_t ss_padding_len = 0;
2014
2015         prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
2016
2017         /*
2018          * Marshall directly into the outgoing PDU space. We
2019          * must do this as we need to set to the bind response
2020          * header and are never sending more than one PDU here.
2021          */
2022
2023         /*
2024          * Setup the memory to marshall the ba header, and the
2025          * auth footers.
2026          */
2027
2028         if(!prs_init(&out_hdr_ba, 1024, p->mem_ctx, MARSHALL)) {
2029                 DEBUG(0,("api_pipe_alter_context: malloc out_hdr_ba failed.\n"));
2030                 prs_mem_free(&p->out_data.frag);
2031                 return False;
2032         }
2033
2034         if(!prs_init(&out_auth, 1024, p->mem_ctx, MARSHALL)) {
2035                 DEBUG(0,("api_pipe_alter_context: malloc out_auth failed.\n"));
2036                 prs_mem_free(&p->out_data.frag);
2037                 prs_mem_free(&out_hdr_ba);
2038                 return False;
2039         }
2040
2041         ZERO_STRUCT(hdr_rb);
2042
2043         DEBUG(5,("api_pipe_alter_context: decode request. %d\n", __LINE__));
2044
2045         /* decode the alter context request */
2046         if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_in_p, 0))  {
2047                 DEBUG(0,("api_pipe_alter_context: unable to unmarshall RPC_HDR_RB struct.\n"));
2048                 goto err_exit;
2049         }
2050
2051         /* secondary address CAN be NULL
2052          * as the specs say it's ignored.
2053          * It MUST be NULL to have the spoolss working.
2054          */
2055         fstrcpy(ack_pipe_name,"");
2056
2057         DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
2058
2059         assoc_gid = hdr_rb.bba.assoc_gid ? hdr_rb.bba.assoc_gid : 0x53f0;
2060
2061         /*
2062          * Create the bind response struct.
2063          */
2064
2065         /* If the requested abstract synt uuid doesn't match our client pipe,
2066                 reject the bind_ack & set the transfer interface synt to all 0's,
2067                 ver 0 (observed when NT5 attempts to bind to abstract interfaces
2068                 unknown to NT4)
2069                 Needed when adding entries to a DACL from NT5 - SK */
2070
2071         if(check_bind_req(p, &hdr_rb.rpc_context[0].abstract, &hdr_rb.rpc_context[0].transfer[0],
2072                                 hdr_rb.rpc_context[0].context_id )) {
2073                 init_rpc_hdr_ba(&hdr_ba,
2074                         RPC_MAX_PDU_FRAG_LEN,
2075                         RPC_MAX_PDU_FRAG_LEN,
2076                         assoc_gid,
2077                         ack_pipe_name,
2078                         0x1, 0x0, 0x0,
2079                         &hdr_rb.rpc_context[0].transfer[0]);
2080         } else {
2081                 /* Rejection reason: abstract syntax not supported */
2082                 init_rpc_hdr_ba(&hdr_ba, RPC_MAX_PDU_FRAG_LEN,
2083                                         RPC_MAX_PDU_FRAG_LEN, assoc_gid,
2084                                         ack_pipe_name, 0x1, 0x2, 0x1,
2085                                         &null_ndr_syntax_id);
2086                 p->pipe_bound = False;
2087         }
2088
2089         /*
2090          * and marshall it.
2091          */
2092
2093         if(!smb_io_rpc_hdr_ba("", &hdr_ba, &out_hdr_ba, 0)) {
2094                 DEBUG(0,("api_pipe_alter_context: marshalling of RPC_HDR_BA failed.\n"));
2095                 goto err_exit;
2096         }
2097
2098
2099         /*
2100          * Check if this is an authenticated alter context request.
2101          */
2102
2103         if (p->hdr.auth_len != 0) {
2104                 /*
2105                  * Decode the authentication verifier.
2106                  */
2107
2108                 /* Work out any padding needed before the auth footer. */
2109                 if ((RPC_HEADER_LEN + prs_offset(&out_hdr_ba)) % SERVER_NDR_PADDING_SIZE) {
2110                         ss_padding_len = SERVER_NDR_PADDING_SIZE -
2111                                 ((RPC_HEADER_LEN + prs_offset(&out_hdr_ba)) % SERVER_NDR_PADDING_SIZE);
2112                         DEBUG(10,("api_pipe_alter_context: auth pad_len = %u\n",
2113                                 (unsigned int)ss_padding_len ));
2114                 }
2115
2116                 /* Quick length check. Won't catch a bad auth footer,
2117                  * prevents overrun. */
2118
2119                 if (p->hdr.frag_len < RPC_HEADER_LEN + RPC_HDR_AUTH_LEN + p->hdr.auth_len) {
2120                         DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
2121                                 "too long for fragment %u.\n",
2122                                 (unsigned int)p->hdr.auth_len,
2123                                 (unsigned int)p->hdr.frag_len ));
2124                         goto err_exit;
2125                 }
2126
2127                 /* Pull the auth header and the following data into a blob. */
2128                 /* NB. The offset of the auth_header is relative to the *end*
2129                  * of the packet, not the start. Also, the length of the
2130                  * data in rpc_in_p is p->hdr.frag_len - RPC_HEADER_LEN,
2131                  * as the RPC header isn't included in rpc_in_p. */
2132                 if(!prs_set_offset(rpc_in_p,
2133                                 p->hdr.frag_len - RPC_HEADER_LEN -
2134                                 RPC_HDR_AUTH_LEN - p->hdr.auth_len)) {
2135                         DEBUG(0,("api_alter_context: cannot move "
2136                                 "offset to %u.\n",
2137                                 (unsigned int)(p->hdr.frag_len -
2138                                 RPC_HDR_AUTH_LEN - p->hdr.auth_len) ));
2139                         goto err_exit;
2140                 }
2141
2142                 if(!smb_io_rpc_hdr_auth("", &auth_info, rpc_in_p, 0)) {
2143                         DEBUG(0,("api_pipe_alter_context: unable to unmarshall RPC_HDR_AUTH struct.\n"));
2144                         goto err_exit;
2145                 }
2146
2147                 /*
2148                  * Currently only the SPNEGO auth type uses the alter ctx
2149                  * response in place of the NTLMSSP auth3 type.
2150                  */
2151
2152                 if (auth_info.auth_type == DCERPC_AUTH_TYPE_SPNEGO) {
2153                         /* We can only finish if the pipe is unbound. */
2154                         if (!p->pipe_bound) {
2155                                 if (!pipe_spnego_auth_bind_continue(p, rpc_in_p,
2156                                                 ss_padding_len, &auth_info, &out_auth)) {
2157                                         goto err_exit;
2158                                 }
2159                         } else {
2160                                 goto err_exit;
2161                         }
2162                 }
2163         } else {
2164                 ZERO_STRUCT(auth_info);
2165         }
2166         /*
2167          * Create the header, now we know the length.
2168          */
2169
2170         if (prs_offset(&out_auth)) {
2171                 auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
2172         }
2173
2174         init_rpc_hdr(&p->hdr, DCERPC_PKT_ALTER_RESP, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
2175                         p->hdr.call_id,
2176                         RPC_HEADER_LEN + prs_offset(&out_hdr_ba) + prs_offset(&out_auth),
2177                         auth_len);
2178
2179         /*
2180          * Marshall the header into the outgoing PDU.
2181          */
2182
2183         if(!smb_io_rpc_hdr("", &p->hdr, &p->out_data.frag, 0)) {
2184                 DEBUG(0,("api_pipe_alter_context: marshalling of RPC_HDR failed.\n"));
2185                 goto err_exit;
2186         }
2187
2188         /*
2189          * Now add the RPC_HDR_BA and any auth needed.
2190          */
2191
2192         if(!prs_append_prs_data(&p->out_data.frag, &out_hdr_ba)) {
2193                 DEBUG(0,("api_pipe_alter_context: append of RPC_HDR_BA failed.\n"));
2194                 goto err_exit;
2195         }
2196
2197         if (auth_len) {
2198                 if (ss_padding_len) {
2199                         char pad[SERVER_NDR_PADDING_SIZE];
2200                         memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
2201                         if (!prs_copy_data_in(&p->out_data.frag, pad,
2202                                         ss_padding_len)) {
2203                                 DEBUG(0,("api_pipe_alter_context: failed to add %u "
2204                                         "bytes of pad data.\n",
2205                                         (unsigned int)ss_padding_len));
2206                                 goto err_exit;
2207                         }
2208                 }
2209
2210                 if (!prs_append_prs_data( &p->out_data.frag, &out_auth)) {
2211                         DEBUG(0,("api_pipe_alter_context: append of auth info failed.\n"));
2212                         goto err_exit;
2213                 }
2214         }
2215
2216         /*
2217          * Setup the lengths for the initial reply.
2218          */
2219
2220         p->out_data.data_sent_length = 0;
2221         p->out_data.current_pdu_sent = 0;
2222
2223         prs_mem_free(&out_hdr_ba);
2224         prs_mem_free(&out_auth);
2225
2226         return True;
2227
2228   err_exit:
2229
2230         prs_mem_free(&p->out_data.frag);
2231         prs_mem_free(&out_hdr_ba);
2232         prs_mem_free(&out_auth);
2233         return setup_bind_nak(p);
2234 }
2235
2236 /****************************************************************************
2237  Deal with NTLMSSP sign & seal processing on an RPC request.
2238 ****************************************************************************/
2239
2240 bool api_pipe_ntlmssp_auth_process(pipes_struct *p, prs_struct *rpc_in,
2241                                         uint32 *p_ss_padding_len, NTSTATUS *pstatus)
2242 {
2243         RPC_HDR_AUTH auth_info;
2244         uint32 auth_len = p->hdr.auth_len;
2245         uint32 save_offset = prs_offset(rpc_in);
2246         AUTH_NTLMSSP_STATE *a = p->auth.a_u.auth_ntlmssp_state;
2247         unsigned char *data = NULL;
2248         size_t data_len;
2249         unsigned char *full_packet_data = NULL;
2250         size_t full_packet_data_len;
2251         DATA_BLOB auth_blob;
2252
2253         *pstatus = NT_STATUS_OK;
2254
2255         if (p->auth.auth_level == DCERPC_AUTH_LEVEL_NONE || p->auth.auth_level == DCERPC_AUTH_LEVEL_CONNECT) {
2256                 return True;
2257         }
2258
2259         if (!a) {
2260                 *pstatus = NT_STATUS_INVALID_PARAMETER;
2261                 return False;
2262         }
2263
2264         /* Ensure there's enough data for an authenticated request. */
2265         if (RPC_HEADER_LEN + RPC_HDR_REQ_LEN + RPC_HDR_AUTH_LEN
2266                         + auth_len > p->hdr.frag_len) {
2267                 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len %u is too large.\n",
2268                         (unsigned int)auth_len ));
2269                 *pstatus = NT_STATUS_INVALID_PARAMETER;
2270                 return False;
2271         }
2272
2273         /*
2274          * We need the full packet data + length (minus auth stuff) as well as the packet data + length
2275          * after the RPC header.
2276          * We need to pass in the full packet (minus auth len) to the NTLMSSP sign and check seal
2277          * functions as NTLMv2 checks the rpc headers also.
2278          * Both of these values include any auth_pad_len bytes.
2279          */
2280
2281         data = (unsigned char *)(prs_data_p(rpc_in) + RPC_HDR_REQ_LEN);
2282         data_len = (size_t)(p->hdr.frag_len - RPC_HEADER_LEN - RPC_HDR_REQ_LEN - RPC_HDR_AUTH_LEN - auth_len);
2283
2284         full_packet_data = p->in_data.current_in_pdu;
2285         full_packet_data_len = p->hdr.frag_len - auth_len;
2286
2287         /* Pull the auth header and the following data into a blob. */
2288         /* NB. The offset of the auth_header is relative to the *end*
2289          * of the packet, not the start. Also, the length of the
2290          * data in rpc_in_p is p->hdr.frag_len - RPC_HEADER_LEN,
2291          * as the RPC header isn't included in rpc_in_p. */
2292         if(!prs_set_offset(rpc_in,
2293                         p->hdr.frag_len - RPC_HEADER_LEN -
2294                         RPC_HDR_AUTH_LEN - auth_len)) {
2295                 DEBUG(0,("api_pipe_ntlmssp_auth_process: cannot move "
2296                         "offset to %u.\n",
2297                         (unsigned int)(p->hdr.frag_len -
2298                                 RPC_HDR_AUTH_LEN - auth_len) ));
2299                 *pstatus = NT_STATUS_INVALID_PARAMETER;
2300                 return False;
2301         }
2302
2303         if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, rpc_in, 0)) {
2304                 DEBUG(0,("api_pipe_ntlmssp_auth_process: failed to "
2305                         "unmarshall RPC_HDR_AUTH.\n"));
2306                 *pstatus = NT_STATUS_INVALID_PARAMETER;
2307                 return False;
2308         }
2309
2310         /* Ensure auth_pad_len fits into the packet. */
2311         if (RPC_HEADER_LEN + RPC_HDR_REQ_LEN + auth_info.auth_pad_len +
2312                         RPC_HDR_AUTH_LEN + auth_len > p->hdr.frag_len) {
2313                 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_info.auth_pad_len "
2314                         "too large (%u), auth_len (%u), frag_len = (%u).\n",
2315                         (unsigned int)auth_info.auth_pad_len,
2316                         (unsigned int)auth_len,
2317                         (unsigned int)p->hdr.frag_len ));
2318                 *pstatus = NT_STATUS_INVALID_PARAMETER;
2319                 return False;
2320         }
2321
2322         auth_blob.data = (unsigned char *)prs_data_p(rpc_in) + prs_offset(rpc_in);
2323         auth_blob.length = auth_len;
2324
2325         switch (p->auth.auth_level) {
2326                 case DCERPC_AUTH_LEVEL_PRIVACY:
2327                         /* Data is encrypted. */
2328                         *pstatus = ntlmssp_unseal_packet(a->ntlmssp_state,
2329                                                         data, data_len,
2330                                                         full_packet_data,
2331                                                         full_packet_data_len,
2332                                                         &auth_blob);
2333                         if (!NT_STATUS_IS_OK(*pstatus)) {
2334                                 return False;
2335                         }
2336                         break;
2337                 case DCERPC_AUTH_LEVEL_INTEGRITY:
2338                         /* Data is signed. */
2339                         *pstatus = ntlmssp_check_packet(a->ntlmssp_state,
2340                                                         data, data_len,
2341                                                         full_packet_data,
2342                                                         full_packet_data_len,
2343                                                         &auth_blob);
2344                         if (!NT_STATUS_IS_OK(*pstatus)) {
2345                                 return False;
2346                         }
2347                         break;
2348                 default:
2349                         *pstatus = NT_STATUS_INVALID_PARAMETER;
2350                         return False;
2351         }
2352
2353         /*
2354          * Return the current pointer to the data offset.
2355          */
2356
2357         if(!prs_set_offset(rpc_in, save_offset)) {
2358                 DEBUG(0,("api_pipe_auth_process: failed to set offset back to %u\n",
2359                         (unsigned int)save_offset ));
2360                 *pstatus = NT_STATUS_INVALID_PARAMETER;
2361                 return False;
2362         }
2363
2364         /*
2365          * Remember the padding length. We must remove it from the real data
2366          * stream once the sign/seal is done.
2367          */
2368
2369         *p_ss_padding_len = auth_info.auth_pad_len;
2370
2371         return True;
2372 }
2373
2374 /****************************************************************************
2375  Deal with schannel processing on an RPC request.
2376 ****************************************************************************/
2377
2378 bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss_padding_len)
2379 {
2380         uint32 data_len;
2381         uint32 auth_len;
2382         uint32 save_offset = prs_offset(rpc_in);
2383         RPC_HDR_AUTH auth_info;
2384         DATA_BLOB blob;
2385         NTSTATUS status;
2386         uint8_t *data;
2387
2388         auth_len = p->hdr.auth_len;
2389
2390         if (auth_len < RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN ||
2391                         auth_len > RPC_HEADER_LEN +
2392                                         RPC_HDR_REQ_LEN +
2393                                         RPC_HDR_AUTH_LEN +
2394                                         auth_len) {
2395                 DEBUG(0,("Incorrect auth_len %u.\n", (unsigned int)auth_len ));
2396                 return False;
2397         }
2398
2399         /*
2400          * The following is that length of the data we must verify or unseal.
2401          * This doesn't include the RPC headers or the auth_len or the RPC_HDR_AUTH_LEN
2402          * preceeding the auth_data, but does include the auth_pad_len bytes.
2403          */
2404
2405         if (p->hdr.frag_len < RPC_HEADER_LEN + RPC_HDR_REQ_LEN + RPC_HDR_AUTH_LEN + auth_len) {
2406                 DEBUG(0,("Incorrect frag %u, auth %u.\n",
2407                         (unsigned int)p->hdr.frag_len,
2408                         (unsigned int)auth_len ));
2409                 return False;
2410         }
2411
2412         data_len = p->hdr.frag_len - RPC_HEADER_LEN - RPC_HDR_REQ_LEN -
2413                 RPC_HDR_AUTH_LEN - auth_len;
2414
2415         DEBUG(5,("data %d auth %d\n", data_len, auth_len));
2416
2417         /* Pull the auth header and the following data into a blob. */
2418         /* NB. The offset of the auth_header is relative to the *end*
2419          * of the packet, not the start. Also, the length of the
2420          * data in rpc_in_p is p->hdr.frag_len - RPC_HEADER_LEN,
2421          * as the RPC header isn't included in rpc_in_p. */
2422         if(!prs_set_offset(rpc_in,
2423                         p->hdr.frag_len - RPC_HEADER_LEN -
2424                         RPC_HDR_AUTH_LEN - auth_len)) {
2425                 DEBUG(0,("api_pipe_schannel_process: cannot move "
2426                         "offset to %u.\n",
2427                         (unsigned int)(p->hdr.frag_len -
2428                                 RPC_HDR_AUTH_LEN - auth_len) ));
2429                 return False;
2430         }
2431
2432         if(!smb_io_rpc_hdr_auth("hdr_auth", &auth_info, rpc_in, 0)) {
2433                 DEBUG(0,("api_pipe_schannel_process: failed to "
2434                         "unmarshall RPC_HDR_AUTH.\n"));
2435                 return False;
2436         }
2437
2438         /* Ensure auth_pad_len fits into the packet. */
2439         if (RPC_HEADER_LEN + RPC_HDR_REQ_LEN + auth_info.auth_pad_len +
2440                         RPC_HDR_AUTH_LEN + auth_len > p->hdr.frag_len) {
2441                 DEBUG(0,("api_pipe_schannel_process: auth_info.auth_pad_len "
2442                         "too large (%u), auth_len (%u), frag_len = (%u).\n",
2443                         (unsigned int)auth_info.auth_pad_len,
2444                         (unsigned int)auth_len,
2445                         (unsigned int)p->hdr.frag_len ));
2446                 return False;
2447         }
2448
2449         if (auth_info.auth_type != DCERPC_AUTH_TYPE_SCHANNEL) {
2450                 DEBUG(0,("Invalid auth info %d on schannel\n",
2451                          auth_info.auth_type));
2452                 return False;
2453         }
2454
2455         blob = data_blob_const(prs_data_p(rpc_in) + prs_offset(rpc_in), auth_len);
2456
2457         if (DEBUGLEVEL >= 10) {
2458                 dump_NL_AUTH_SIGNATURE(talloc_tos(), &blob);
2459         }
2460
2461         data = (uint8_t *)prs_data_p(rpc_in)+RPC_HDR_REQ_LEN;
2462
2463         switch (auth_info.auth_level) {
2464         case DCERPC_AUTH_LEVEL_PRIVACY:
2465                 status = netsec_incoming_packet(p->auth.a_u.schannel_auth,
2466                                                 talloc_tos(),
2467                                                 true,
2468                                                 data,
2469                                                 data_len,
2470                                                 &blob);
2471                 break;
2472         case DCERPC_AUTH_LEVEL_INTEGRITY:
2473                 status = netsec_incoming_packet(p->auth.a_u.schannel_auth,
2474                                                 talloc_tos(),
2475                                                 false,
2476                                                 data,
2477                                                 data_len,
2478                                                 &blob);
2479                 break;
2480         default:
2481                 status = NT_STATUS_INTERNAL_ERROR;
2482                 break;
2483         }
2484
2485         if (!NT_STATUS_IS_OK(status)) {
2486                 DEBUG(0,("failed to unseal packet: %s\n", nt_errstr(status)));
2487                 return false;
2488         }
2489
2490         /*
2491          * Return the current pointer to the data offset.
2492          */
2493
2494         if(!prs_set_offset(rpc_in, save_offset)) {
2495                 DEBUG(0,("failed to set offset back to %u\n",
2496                          (unsigned int)save_offset ));
2497                 return False;
2498         }
2499
2500         /*
2501          * Remember the padding length. We must remove it from the real data
2502          * stream once the sign/seal is done.
2503          */
2504
2505         *p_ss_padding_len = auth_info.auth_pad_len;
2506
2507         return True;
2508 }
2509
2510 /****************************************************************************
2511  Find the set of RPC functions associated with this context_id
2512 ****************************************************************************/
2513
2514 static PIPE_RPC_FNS* find_pipe_fns_by_context( PIPE_RPC_FNS *list, uint32 context_id )
2515 {
2516         PIPE_RPC_FNS *fns = NULL;
2517
2518         if ( !list ) {
2519                 DEBUG(0,("find_pipe_fns_by_context: ERROR!  No context list for pipe!\n"));
2520                 return NULL;
2521         }
2522
2523         for (fns=list; fns; fns=fns->next ) {
2524                 if ( fns->context_id == context_id )
2525                         return fns;
2526         }
2527         return NULL;
2528 }
2529
2530 /****************************************************************************
2531  Memory cleanup.
2532 ****************************************************************************/
2533
2534 void free_pipe_rpc_context( PIPE_RPC_FNS *list )
2535 {
2536         PIPE_RPC_FNS *tmp = list;
2537         PIPE_RPC_FNS *tmp2;
2538
2539         while (tmp) {
2540                 tmp2 = tmp->next;
2541                 SAFE_FREE(tmp);
2542                 tmp = tmp2;
2543         }
2544
2545         return;
2546 }
2547
2548 static bool api_rpcTNP(pipes_struct *p,
2549                        const struct api_struct *api_rpc_cmds, int n_cmds);
2550
2551 /****************************************************************************
2552  Find the correct RPC function to call for this request.
2553  If the pipe is authenticated then become the correct UNIX user
2554  before doing the call.
2555 ****************************************************************************/
2556
2557 bool api_pipe_request(pipes_struct *p)
2558 {
2559         bool ret = False;
2560         bool changed_user = False;
2561         PIPE_RPC_FNS *pipe_fns;
2562
2563         if (p->pipe_bound &&
2564                         ((p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) ||
2565                          (p->auth.auth_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP))) {
2566                 if(!become_authenticated_pipe_user(p)) {
2567                         prs_mem_free(&p->out_data.rdata);
2568                         return False;
2569                 }
2570                 changed_user = True;
2571         }
2572
2573         DEBUG(5, ("Requested \\PIPE\\%s\n",
2574                   get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
2575
2576         /* get the set of RPC functions for this context */
2577
2578         pipe_fns = find_pipe_fns_by_context(p->contexts, p->hdr_req.context_id);
2579
2580         if ( pipe_fns ) {
2581                 TALLOC_CTX *frame = talloc_stackframe();
2582                 ret = api_rpcTNP(p, pipe_fns->cmds, pipe_fns->n_cmds);
2583                 TALLOC_FREE(frame);
2584         }
2585         else {
2586                 DEBUG(0,("api_pipe_request: No rpc function table associated with context [%d] on pipe [%s]\n",
2587                         p->hdr_req.context_id,
2588                          get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
2589         }
2590
2591         if (changed_user) {
2592                 unbecome_authenticated_pipe_user();
2593         }
2594
2595         return ret;
2596 }
2597
2598 /*******************************************************************
2599  Calls the underlying RPC function for a named pipe.
2600  ********************************************************************/
2601
2602 static bool api_rpcTNP(pipes_struct *p,
2603                        const struct api_struct *api_rpc_cmds, int n_cmds)
2604 {
2605         int fn_num;
2606         uint32 offset1, offset2;
2607
2608         /* interpret the command */
2609         DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
2610                  get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
2611                  p->hdr_req.opnum));
2612
2613         if (DEBUGLEVEL >= 50) {
2614                 fstring name;
2615                 slprintf(name, sizeof(name)-1, "in_%s",
2616                          get_pipe_name_from_syntax(talloc_tos(), &p->syntax));
2617                 prs_dump(name, p->hdr_req.opnum, &p->in_data.data);
2618         }
2619
2620         for (fn_num = 0; fn_num < n_cmds; fn_num++) {
2621                 if (api_rpc_cmds[fn_num].opnum == p->hdr_req.opnum && api_rpc_cmds[fn_num].fn != NULL) {
2622                         DEBUG(3,("api_rpcTNP: rpc command: %s\n", api_rpc_cmds[fn_num].name));
2623                         break;
2624                 }
2625         }
2626
2627         if (fn_num == n_cmds) {
2628                 /*
2629                  * For an unknown RPC just return a fault PDU but
2630                  * return True to allow RPC's on the pipe to continue
2631                  * and not put the pipe into fault state. JRA.
2632                  */
2633                 DEBUG(4, ("unknown\n"));
2634                 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
2635                 return True;
2636         }
2637
2638         offset1 = prs_offset(&p->out_data.rdata);
2639
2640         DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
2641                 fn_num, api_rpc_cmds[fn_num].fn));
2642         /* do the actual command */
2643         if(!api_rpc_cmds[fn_num].fn(p)) {
2644                 DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
2645                          get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
2646                          api_rpc_cmds[fn_num].name));
2647                 prs_mem_free(&p->out_data.rdata);
2648                 return False;
2649         }
2650
2651         if (p->bad_handle_fault_state) {
2652                 DEBUG(4,("api_rpcTNP: bad handle fault return.\n"));
2653                 p->bad_handle_fault_state = False;
2654                 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_CONTEXT_MISMATCH));
2655                 return True;
2656         }
2657
2658         if (p->rng_fault_state) {
2659                 DEBUG(4, ("api_rpcTNP: rng fault return\n"));
2660                 p->rng_fault_state = False;
2661                 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
2662                 return True;
2663         }
2664
2665         offset2 = prs_offset(&p->out_data.rdata);
2666         prs_set_offset(&p->out_data.rdata, offset1);
2667         if (DEBUGLEVEL >= 50) {
2668                 fstring name;
2669                 slprintf(name, sizeof(name)-1, "out_%s",
2670                          get_pipe_name_from_syntax(talloc_tos(), &p->syntax));
2671                 prs_dump(name, p->hdr_req.opnum, &p->out_data.rdata);
2672         }
2673         prs_set_offset(&p->out_data.rdata, offset2);
2674
2675         DEBUG(5,("api_rpcTNP: called %s successfully\n",
2676                  get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
2677
2678         /* Check for buffer underflow in rpc parsing */
2679
2680         if ((DEBUGLEVEL >= 10) &&
2681             (prs_offset(&p->in_data.data) != prs_data_size(&p->in_data.data))) {
2682                 size_t data_len = prs_data_size(&p->in_data.data) - prs_offset(&p->in_data.data);
2683                 char *data = (char *)SMB_MALLOC(data_len);
2684
2685                 DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
2686                 if (data) {
2687                         prs_uint8s(False, "", &p->in_data.data, 0, (unsigned char *)data, (uint32)data_len);
2688                         SAFE_FREE(data);
2689                 }
2690
2691         }
2692
2693         return True;
2694 }