source/librpc/rpc/dcerpc_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc utility functions
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Jelmer Vernooij 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   9    Copyright (C) Rafal Szczesniak 2006
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "lib/events/events.h"
  27 #include "libcli/composite/composite.h"
  28 #include "librpc/gen_ndr/ndr_epmapper_c.h"
  29 #include "librpc/gen_ndr/ndr_dcerpc.h"
  30 #include "librpc/gen_ndr/ndr_misc.h"
  31 #include "auth/credentials/credentials.h"
  32
  33 /*
  34   find a dcerpc call on an interface by name
  35 */
  36 const struct ndr_interface_call *dcerpc_iface_find_call(const struct ndr_interface_table *iface,
  37                                                         const char *name)
  38 {
  39         int i;
  40         for (i=0;i<iface->num_calls;i++) {
  41                 if (strcmp(iface->calls[i].name, name) == 0) {
  42                         return &iface->calls[i];
  43                 }
  44         }
  45         return NULL;
  46 }
  47
  48 /*
  49    push a ncacn_packet into a blob, potentially with auth info
  50 */
  51 NTSTATUS ncacn_push_auth(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
  52                           struct ncacn_packet *pkt,
  53                           struct dcerpc_auth *auth_info)
  54 {
  55         NTSTATUS status;
  56         struct ndr_push *ndr;
  57
  58         ndr = ndr_push_init_ctx(mem_ctx);
  59         if (!ndr) {
  60                 return NT_STATUS_NO_MEMORY;
  61         }
  62
  63         if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
  64                 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
  65         }
  66
  67         if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
  68                 ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
  69         }
  70
  71         if (auth_info) {
  72                 pkt->auth_length = auth_info->credentials.length;
  73         } else {
  74                 pkt->auth_length = 0;
  75         }
  76
  77         status = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
  78         if (!NT_STATUS_IS_OK(status)) {
  79                 return status;
  80         }
  81
  82         if (auth_info) {
  83                 status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info);
  84         }
  85
  86         *blob = ndr_push_blob(ndr);
  87
  88         /* fill in the frag length */
  89         dcerpc_set_frag_length(blob, blob->length);
  90
  91         return NT_STATUS_OK;
  92 }
  93
  94 #define MAX_PROTSEQ             10
  95
  96 static const struct {
  97         const char *name;
  98         enum dcerpc_transport_t transport;
  99         int num_protocols;
 100         enum epm_protocol protseq[MAX_PROTSEQ];
 101 } transports[] = {
 102         { "ncacn_np",     NCACN_NP, 3,
 103                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
 104         { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
 105                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
 106         { "ncacn_http", NCACN_HTTP, 3,
 107                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
 108         { "ncadg_ip_udp", NCACN_IP_UDP, 3,
 109                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
 110         { "ncalrpc", NCALRPC, 2,
 111                 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE } },
 112         { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
 113                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
 114         { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
 115                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
 116         { "ncacn_at_dsp", NCACN_AT_DSP, 3,
 117                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
 118         { "ncadg_at_ddp", NCADG_AT_DDP, 3,
 119                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
 120         { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
 121                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
 122         { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
 123                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
 124         { "ncadg_ipx", NCADG_IPX, 2,
 125                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
 126         },
 127         { "ncacn_spx", NCACN_SPX, 3,
 128                 /* I guess some MS programmer confused the identifier for
 129                  * EPM_PROTOCOL_UUID (0x0D or 13) with the one for
 130                  * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/
 131                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID },
 132         },
 133 };
 134
 135 static const struct {
 136         const char *name;
 137         uint32_t flag;
 138 } ncacn_options[] = {
 139         {"sign", DCERPC_SIGN},
 140         {"seal", DCERPC_SEAL},
 141         {"connect", DCERPC_CONNECT},
 142         {"spnego", DCERPC_AUTH_SPNEGO},
 143         {"ntlm", DCERPC_AUTH_NTLM},
 144         {"krb5", DCERPC_AUTH_KRB5},
 145         {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
 146         {"print", DCERPC_DEBUG_PRINT_BOTH},
 147         {"padcheck", DCERPC_DEBUG_PAD_CHECK},
 148         {"bigendian", DCERPC_PUSH_BIGENDIAN},
 149         {"smb2", DCERPC_SMB2}
 150 };
 151
 152 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 153 {
 154         struct ndr_syntax_id syntax;
 155         NTSTATUS status;
 156
 157         switch(epm_floor->lhs.protocol) {
 158                 case EPM_PROTOCOL_UUID:
 159                         status = dcerpc_floor_get_lhs_data(epm_floor, &syntax);
 160                         if (NT_STATUS_IS_OK(status)) {
 161                                 /* lhs is used: UUID */
 162                                 char *uuidstr;
 163
 164                                 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax.uuid)) {
 165                                         return "NDR";
 166                                 }
 167
 168                                 if (GUID_equal(&syntax.uuid, &ndr64_transfer_syntax.uuid)) {
 169                                         return "NDR64";
 170                                 }
 171
 172                                 uuidstr = GUID_string(mem_ctx, &syntax.uuid);
 173
 174                                 return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.if_version);
 175                         } else { /* IPX */
 176                                 return talloc_asprintf(mem_ctx, "IPX:%s",
 177                                                 data_blob_hex_string(mem_ctx, &epm_floor->rhs.uuid.unknown));
 178                         }
 179
 180                 case EPM_PROTOCOL_NCACN:
 181                         return "RPC-C";
 182
 183                 case EPM_PROTOCOL_NCADG:
 184                         return "RPC";
 185
 186                 case EPM_PROTOCOL_NCALRPC:
 187                         return "NCALRPC";
 188
 189                 case EPM_PROTOCOL_DNET_NSP:
 190                         return "DNET/NSP";
 191
 192                 case EPM_PROTOCOL_IP:
 193                         return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr);
 194
 195                 case EPM_PROTOCOL_PIPE:
 196                         return talloc_asprintf(mem_ctx, "PIPE:%s", epm_floor->rhs.pipe.path);
 197
 198                 case EPM_PROTOCOL_SMB:
 199                         return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc);
 200
 201                 case EPM_PROTOCOL_UNIX_DS:
 202                         return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path);
 203
 204                 case EPM_PROTOCOL_NETBIOS:
 205                         return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name);
 206
 207                 case EPM_PROTOCOL_NETBEUI:
 208                         return "NETBeui";
 209
 210                 case EPM_PROTOCOL_SPX:
 211                         return "SPX";
 212
 213                 case EPM_PROTOCOL_NB_IPX:
 214                         return "NB_IPX";
 215
 216                 case EPM_PROTOCOL_HTTP:
 217                         return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port);
 218
 219                 case EPM_PROTOCOL_TCP:
 220                         return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port);
 221
 222                 case EPM_PROTOCOL_UDP:
 223                         return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port);
 224
 225                 default:
 226                         return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol);
 227         }
 228 }
 229
 230
 231 /*
 232   form a binding string from a binding structure
 233 */
 234 char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
 235 {
 236         char *s = talloc_strdup(mem_ctx, "");
 237         int i;
 238         const char *t_name=NULL;
 239
 240         for (i=0;i<ARRAY_SIZE(transports);i++) {
 241                 if (transports[i].transport == b->transport) {
 242                         t_name = transports[i].name;
 243                 }
 244         }
 245         if (!t_name) {
 246                 return NULL;
 247         }
 248
 249         if (!GUID_all_zero(&b->object.uuid)) {
 250                 s = talloc_asprintf(s, "%s@",
 251                                     GUID_string(mem_ctx, &b->object.uuid));
 252         }
 253
 254         s = talloc_asprintf_append(s, "%s:", t_name);
 255         if (!s) return NULL;
 256
 257         if (b->host) {
 258                 s = talloc_asprintf_append(s, "%s", b->host);
 259         }
 260
 261         if (!b->endpoint && !b->options && !b->flags) {
 262                 return s;
 263         }
 264
 265         s = talloc_asprintf_append(s, "[");
 266
 267         if (b->endpoint) {
 268                 s = talloc_asprintf_append(s, "%s", b->endpoint);
 269         }
 270
 271         /* this is a *really* inefficent way of dealing with strings,
 272            but this is rarely called and the strings are always short,
 273            so I don't care */
 274         for (i=0;b->options && b->options[i];i++) {
 275                 s = talloc_asprintf_append(s, ",%s", b->options[i]);
 276                 if (!s) return NULL;
 277         }
 278
 279         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 280                 if (b->flags & ncacn_options[i].flag) {
 281                         s = talloc_asprintf_append(s, ",%s", ncacn_options[i].name);
 282                         if (!s) return NULL;
 283                 }
 284         }
 285
 286         s = talloc_asprintf_append(s, "]");
 287
 288         return s;
 289 }
 290
 291 /*
 292   parse a binding string into a dcerpc_binding structure
 293 */
 294 NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
 295 {
 296         struct dcerpc_binding *b;
 297         char *options, *type;
 298         char *p;
 299         int i, j, comma_count;
 300
 301         b = talloc(mem_ctx, struct dcerpc_binding);
 302         if (!b) {
 303                 return NT_STATUS_NO_MEMORY;
 304         }
 305
 306         p = strchr(s, '@');
 307
 308         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 309                 NTSTATUS status;
 310
 311                 status = GUID_from_string(s, &b->object.uuid);
 312
 313                 if (NT_STATUS_IS_ERR(status)) {
 314                         DEBUG(0, ("Failed parsing UUID\n"));
 315                         return status;
 316                 }
 317
 318                 s = p + 1;
 319         } else {
 320                 ZERO_STRUCT(b->object);
 321         }
 322
 323         b->object.if_version = 0;
 324
 325         p = strchr(s, ':');
 326         if (!p) {
 327                 return NT_STATUS_INVALID_PARAMETER;
 328         }
 329
 330         type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 331         if (!type) {
 332                 return NT_STATUS_NO_MEMORY;
 333         }
 334
 335         for (i=0;i<ARRAY_SIZE(transports);i++) {
 336                 if (strcasecmp(type, transports[i].name) == 0) {
 337                         b->transport = transports[i].transport;
 338                         break;
 339                 }
 340         }
 341         if (i==ARRAY_SIZE(transports)) {
 342                 DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 343                 return NT_STATUS_INVALID_PARAMETER;
 344         }
 345
 346         s = p+1;
 347
 348         p = strchr(s, '[');
 349         if (p) {
 350                 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
 351                 options = talloc_strdup(mem_ctx, p+1);
 352                 if (options[strlen(options)-1] != ']') {
 353                         return NT_STATUS_INVALID_PARAMETER;
 354                 }
 355                 options[strlen(options)-1] = 0;
 356         } else {
 357                 b->host = talloc_strdup(b, s);
 358                 options = NULL;
 359         }
 360         if (!b->host) {
 361                 return NT_STATUS_NO_MEMORY;
 362         }
 363
 364         b->target_hostname = b->host;
 365
 366         b->options = NULL;
 367         b->flags = 0;
 368         b->assoc_group_id = 0;
 369         b->endpoint = NULL;
 370
 371         if (!options) {
 372                 *b_out = b;
 373                 return NT_STATUS_OK;
 374         }
 375
 376         comma_count = count_chars(options, ',');
 377
 378         b->options = talloc_array(b, const char *, comma_count+2);
 379         if (!b->options) {
 380                 return NT_STATUS_NO_MEMORY;
 381         }
 382
 383         for (i=0; (p = strchr(options, ',')); i++) {
 384                 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
 385                 if (!b->options[i]) {
 386                         return NT_STATUS_NO_MEMORY;
 387                 }
 388                 options = p+1;
 389         }
 390         b->options[i] = options;
 391         b->options[i+1] = NULL;
 392
 393         /* some options are pre-parsed for convenience */
 394         for (i=0;b->options[i];i++) {
 395                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 396                         if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
 397                                 int k;
 398                                 b->flags |= ncacn_options[j].flag;
 399                                 for (k=i;b->options[k];k++) {
 400                                         b->options[k] = b->options[k+1];
 401                                 }
 402                                 i--;
 403                                 break;
 404                         }
 405                 }
 406         }
 407
 408         if (b->options[0]) {
 409                 /* Endpoint is first option */
 410                 b->endpoint = b->options[0];
 411                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 412
 413                 for (i=0;b->options[i];i++) {
 414                         b->options[i] = b->options[i+1];
 415                 }
 416         }
 417
 418         if (b->options[0] == NULL)
 419                 b->options = NULL;
 420
 421         *b_out = b;
 422         return NT_STATUS_OK;
 423 }
 424
 425 NTSTATUS dcerpc_floor_get_lhs_data(struct epm_floor *epm_floor, struct ndr_syntax_id *syntax)
 426 {
 427         TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
 428         struct ndr_pull *ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx);
 429         NTSTATUS status;
 430         uint16_t if_version=0;
 431
 432         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 433
 434         status = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 435         if (NT_STATUS_IS_ERR(status)) {
 436                 talloc_free(mem_ctx);
 437                 return status;
 438         }
 439
 440         status = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
 441         syntax->if_version = if_version;
 442
 443         talloc_free(mem_ctx);
 444
 445         return status;
 446 }
 447
 448 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
 449 {
 450         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 451
 452         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 453
 454         ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 455         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
 456
 457         return ndr_push_blob(ndr);
 458 }
 459
 460 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 461 {
 462         switch (epm_floor->lhs.protocol) {
 463         case EPM_PROTOCOL_TCP:
 464                 if (epm_floor->rhs.tcp.port == 0) return NULL;
 465                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
 466
 467         case EPM_PROTOCOL_UDP:
 468                 if (epm_floor->rhs.udp.port == 0) return NULL;
 469                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
 470
 471         case EPM_PROTOCOL_HTTP:
 472                 if (epm_floor->rhs.http.port == 0) return NULL;
 473                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
 474
 475         case EPM_PROTOCOL_IP:
 476                 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
 477
 478         case EPM_PROTOCOL_NCACN:
 479                 return NULL;
 480
 481         case EPM_PROTOCOL_NCADG:
 482                 return NULL;
 483
 484         case EPM_PROTOCOL_SMB:
 485                 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
 486                 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
 487
 488         case EPM_PROTOCOL_PIPE:
 489                 if (strlen(epm_floor->rhs.pipe.path) == 0) return NULL;
 490                 return talloc_strdup(mem_ctx, epm_floor->rhs.pipe.path);
 491
 492         case EPM_PROTOCOL_NETBIOS:
 493                 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
 494                 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
 495
 496         case EPM_PROTOCOL_NCALRPC:
 497                 return NULL;
 498
 499         case EPM_PROTOCOL_VINES_SPP:
 500                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
 501
 502         case EPM_PROTOCOL_VINES_IPC:
 503                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
 504
 505         case EPM_PROTOCOL_STREETTALK:
 506                 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
 507
 508         case EPM_PROTOCOL_UNIX_DS:
 509                 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
 510                 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
 511
 512         case EPM_PROTOCOL_NULL:
 513                 return NULL;
 514
 515         default:
 516                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 517                 break;
 518         }
 519
 520         return NULL;
 521 }
 522
 523 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor,  const char *data)
 524 {
 525         switch (epm_floor->lhs.protocol) {
 526         case EPM_PROTOCOL_TCP:
 527                 epm_floor->rhs.tcp.port = atoi(data);
 528                 return NT_STATUS_OK;
 529
 530         case EPM_PROTOCOL_UDP:
 531                 epm_floor->rhs.udp.port = atoi(data);
 532                 return NT_STATUS_OK;
 533
 534         case EPM_PROTOCOL_HTTP:
 535                 epm_floor->rhs.http.port = atoi(data);
 536                 return NT_STATUS_OK;
 537
 538         case EPM_PROTOCOL_IP:
 539                 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
 540                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
 541                 return NT_STATUS_OK;
 542
 543         case EPM_PROTOCOL_NCACN:
 544                 epm_floor->rhs.ncacn.minor_version = 0;
 545                 return NT_STATUS_OK;
 546
 547         case EPM_PROTOCOL_NCADG:
 548                 epm_floor->rhs.ncadg.minor_version = 0;
 549                 return NT_STATUS_OK;
 550
 551         case EPM_PROTOCOL_SMB:
 552                 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 553                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
 554                 return NT_STATUS_OK;
 555
 556         case EPM_PROTOCOL_PIPE:
 557                 epm_floor->rhs.pipe.path = talloc_strdup(mem_ctx, data);
 558                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.pipe.path);
 559                 return NT_STATUS_OK;
 560
 561         case EPM_PROTOCOL_NETBIOS:
 562                 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 563                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
 564                 return NT_STATUS_OK;
 565
 566         case EPM_PROTOCOL_NCALRPC:
 567                 return NT_STATUS_OK;
 568
 569         case EPM_PROTOCOL_VINES_SPP:
 570                 epm_floor->rhs.vines_spp.port = atoi(data);
 571                 return NT_STATUS_OK;
 572
 573         case EPM_PROTOCOL_VINES_IPC:
 574                 epm_floor->rhs.vines_ipc.port = atoi(data);
 575                 return NT_STATUS_OK;
 576
 577         case EPM_PROTOCOL_STREETTALK:
 578                 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 579                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
 580                 return NT_STATUS_OK;
 581
 582         case EPM_PROTOCOL_UNIX_DS:
 583                 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 584                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
 585                 return NT_STATUS_OK;
 586
 587         case EPM_PROTOCOL_NULL:
 588                 return NT_STATUS_OK;
 589
 590         default:
 591                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 592                 break;
 593         }
 594
 595         return NT_STATUS_NOT_SUPPORTED;
 596 }
 597
 598 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 599 {
 600         int i;
 601
 602         /* Find a transport that has 'prot' as 4th protocol */
 603         for (i=0;i<ARRAY_SIZE(transports);i++) {
 604                 if (transports[i].num_protocols >= 2 &&
 605                         transports[i].protseq[1] == prot) {
 606                         return transports[i].transport;
 607                 }
 608         }
 609
 610         /* Unknown transport */
 611         return (unsigned int)-1;
 612 }
 613
 614 enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower)
 615 {
 616         int i;
 617
 618         /* Find a transport that matches this tower */
 619         for (i=0;i<ARRAY_SIZE(transports);i++) {
 620                 int j;
 621                 if (transports[i].num_protocols != tower->num_floors - 2) {
 622                         continue;
 623                 }
 624
 625                 for (j = 0; j < transports[i].num_protocols; j++) {
 626                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 627                                 break;
 628                         }
 629                 }
 630
 631                 if (j == transports[i].num_protocols) {
 632                         return transports[i].transport;
 633                 }
 634         }
 635
 636         /* Unknown transport */
 637         return (unsigned int)-1;
 638 }
 639
 640 NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx, struct epm_tower *tower, struct dcerpc_binding **b_out)
 641 {
 642         NTSTATUS status;
 643         struct dcerpc_binding *binding;
 644
 645         binding = talloc(mem_ctx, struct dcerpc_binding);
 646         NT_STATUS_HAVE_NO_MEMORY(binding);
 647
 648         ZERO_STRUCT(binding->object);
 649         binding->options = NULL;
 650         binding->host = NULL;
 651         binding->target_hostname = NULL;
 652         binding->flags = 0;
 653         binding->assoc_group_id = 0;
 654
 655         binding->transport = dcerpc_transport_by_tower(tower);
 656
 657         if (binding->transport == (unsigned int)-1) {
 658                 return NT_STATUS_NOT_SUPPORTED;
 659         }
 660
 661         if (tower->num_floors < 1) {
 662                 return NT_STATUS_OK;
 663         }
 664
 665         /* Set object uuid */
 666         status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
 667
 668         if (!NT_STATUS_IS_OK(status)) {
 669                 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
 670                 return status;
 671         }
 672
 673         /* Ignore floor 1, it contains the NDR version info */
 674
 675         binding->options = NULL;
 676
 677         /* Set endpoint */
 678         if (tower->num_floors >= 4) {
 679                 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
 680         } else {
 681                 binding->endpoint = NULL;
 682         }
 683
 684         /* Set network address */
 685         if (tower->num_floors >= 5) {
 686                 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
 687                 NT_STATUS_HAVE_NO_MEMORY(binding->host);
 688                 binding->target_hostname = binding->host;
 689         }
 690         *b_out = binding;
 691         return NT_STATUS_OK;
 692 }
 693
 694 NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower)
 695 {
 696         const enum epm_protocol *protseq = NULL;
 697         int num_protocols = -1, i;
 698         NTSTATUS status;
 699
 700         /* Find transport */
 701         for (i=0;i<ARRAY_SIZE(transports);i++) {
 702                 if (transports[i].transport == binding->transport) {
 703                         protseq = transports[i].protseq;
 704                         num_protocols = transports[i].num_protocols;
 705                         break;
 706                 }
 707         }
 708
 709         if (num_protocols == -1) {
 710                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 711                 return NT_STATUS_UNSUCCESSFUL;
 712         }
 713
 714         tower->num_floors = 2 + num_protocols;
 715         tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
 716
 717         /* Floor 0 */
 718         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 719
 720         tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &binding->object);
 721
 722         tower->floors[0].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 723
 724         /* Floor 1 */
 725         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 726
 727         tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx,
 728                                                                 &ndr_transfer_syntax);
 729
 730         tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 731
 732         /* Floor 2 to num_protocols */
 733         for (i = 0; i < num_protocols; i++) {
 734                 tower->floors[2 + i].lhs.protocol = protseq[i];
 735                 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(mem_ctx, NULL, 0);
 736                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 737                 dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], "");
 738         }
 739
 740         /* The 4th floor contains the endpoint */
 741         if (num_protocols >= 2 && binding->endpoint) {
 742                 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint);
 743                 if (NT_STATUS_IS_ERR(status)) {
 744                         return status;
 745                 }
 746         }
 747
 748         /* The 5th contains the network address */
 749         if (num_protocols >= 3 && binding->host) {
 750                 if (is_ipaddress(binding->host)) {
 751                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 752                                                            binding->host);
 753                 } else {
 754                         /* note that we don't attempt to resolve the
 755                            name here - when we get a hostname here we
 756                            are in the client code, and want to put in
 757                            a wildcard all-zeros IP for the server to
 758                            fill in */
 759                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 760                                                            "0.0.0.0");
 761                 }
 762                 if (NT_STATUS_IS_ERR(status)) {
 763                         return status;
 764                 }
 765         }
 766
 767         return NT_STATUS_OK;
 768 }
 769
 770
 771 struct epm_map_binding_state {
 772         struct dcerpc_binding *binding;
 773         const struct ndr_interface_table *table;
 774         struct dcerpc_pipe *pipe;
 775         struct policy_handle handle;
 776         struct GUID guid;
 777         struct epm_twr_t twr;
 778         struct epm_twr_t *twr_r;
 779         struct epm_Map r;
 780 };
 781
 782
 783 static void continue_epm_recv_binding(struct composite_context *ctx);
 784 static void continue_epm_map(struct rpc_request *req);
 785
 786
 787 /*
 788   Stage 2 of epm_map_binding: Receive connected rpc pipe and send endpoint
 789   mapping rpc request
 790 */
 791 static void continue_epm_recv_binding(struct composite_context *ctx)
 792 {
 793         struct rpc_request *map_req;
 794
 795         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 796                                                       struct composite_context);
 797         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 798                                                           struct epm_map_binding_state);
 799
 800         /* receive result of rpc pipe connect request */
 801         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 802         if (!composite_is_ok(c)) return;
 803
 804         s->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
 805
 806         /* prepare requested binding parameters */
 807         s->binding->object         = s->table->syntax_id;
 808
 809         c->status = dcerpc_binding_build_tower(s->pipe, s->binding, &s->twr.tower);
 810         if (!composite_is_ok(c)) return;
 811
 812         /* with some nice pretty paper around it of course */
 813         s->r.in.object        = &s->guid;
 814         s->r.in.map_tower     = &s->twr;
 815         s->r.in.entry_handle  = &s->handle;
 816         s->r.in.max_towers    = 1;
 817         s->r.out.entry_handle = &s->handle;
 818
 819         /* send request for an endpoint mapping - a rpc request on connected pipe */
 820         map_req = dcerpc_epm_Map_send(s->pipe, c, &s->r);
 821         if (composite_nomem(map_req, c)) return;
 822
 823         composite_continue_rpc(c, map_req, continue_epm_map, c);
 824 }
 825
 826
 827 /*
 828   Stage 3 of epm_map_binding: Receive endpoint mapping and provide binding details
 829 */
 830 static void continue_epm_map(struct rpc_request *req)
 831 {
 832         struct composite_context *c = talloc_get_type(req->async.private_data,
 833                                                       struct composite_context);
 834         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 835                                                           struct epm_map_binding_state);
 836
 837         /* receive result of a rpc request */
 838         c->status = dcerpc_ndr_request_recv(req);
 839         if (!composite_is_ok(c)) return;
 840
 841         /* check the details */
 842         if (s->r.out.result != 0 || *s->r.out.num_towers != 1) {
 843                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 844                 return;
 845         }
 846
 847         s->twr_r = s->r.out.towers[0].twr;
 848         if (s->twr_r == NULL) {
 849                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 850                 return;
 851         }
 852
 853         if (s->twr_r->tower.num_floors != s->twr.tower.num_floors ||
 854             s->twr_r->tower.floors[3].lhs.protocol != s->twr.tower.floors[3].lhs.protocol) {
 855                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 856                 return;
 857         }
 858
 859         /* get received endpoint */
 860         s->binding->endpoint = talloc_reference(s->binding,
 861                                                 dcerpc_floor_get_rhs_data(c, &s->twr_r->tower.floors[3]));
 862         if (composite_nomem(s->binding->endpoint, c)) return;
 863
 864         composite_done(c);
 865 }
 866
 867
 868 /*
 869   Request for endpoint mapping of dcerpc binding - try to request for endpoint
 870   unless there is default one.
 871 */
 872 struct composite_context *dcerpc_epm_map_binding_send(TALLOC_CTX *mem_ctx,
 873                                                       struct dcerpc_binding *binding,
 874                                                       const struct ndr_interface_table *table,
 875                                                       struct event_context *ev)
 876 {
 877         struct composite_context *c;
 878         struct epm_map_binding_state *s;
 879         struct composite_context *pipe_connect_req;
 880         struct cli_credentials *anon_creds;
 881         struct event_context *new_ev = NULL;
 882
 883         NTSTATUS status;
 884         struct dcerpc_binding *epmapper_binding;
 885         int i;
 886
 887         /* Try to find event context in memory context in case passed
 888          * event_context (argument) was NULL. If there's none, just
 889          * create a new one.
 890          */
 891         if (ev == NULL) {
 892                 ev = event_context_find(mem_ctx);
 893                 if (ev == NULL) {
 894                         new_ev = event_context_init(mem_ctx);
 895                         if (new_ev == NULL) return NULL;
 896                         ev = new_ev;
 897                 }
 898         }
 899
 900         /* composite context allocation and setup */
 901         c = composite_create(mem_ctx, ev);
 902         if (c == NULL) {
 903                 talloc_free(new_ev);
 904                 return NULL;
 905         }
 906         talloc_steal(c, new_ev);
 907
 908         s = talloc_zero(c, struct epm_map_binding_state);
 909         if (composite_nomem(s, c)) return c;
 910         c->private_data = s;
 911
 912         s->binding = binding;
 913         s->table   = table;
 914
 915         /* anonymous credentials for rpc connection used to get endpoint mapping */
 916         anon_creds = cli_credentials_init(mem_ctx);
 917         cli_credentials_set_event_context(anon_creds, ev);
 918         cli_credentials_set_conf(anon_creds);
 919         cli_credentials_set_anonymous(anon_creds);
 920
 921         /*
 922           First, check if there is a default endpoint specified in the IDL
 923         */
 924         if (table) {
 925                 struct dcerpc_binding *default_binding;
 926
 927                 /* Find one of the default pipes for this interface */
 928                 for (i = 0; i < table->endpoints->count; i++) {
 929                         status = dcerpc_parse_binding(mem_ctx, table->endpoints->names[i], &default_binding);
 930
 931                         if (NT_STATUS_IS_OK(status)) {
 932                                 if (default_binding->transport == binding->transport && default_binding->endpoint) {
 933                                         binding->endpoint = talloc_reference(binding, default_binding->endpoint);
 934                                         talloc_free(default_binding);
 935
 936                                         composite_done(c);
 937                                         return c;
 938
 939                                 } else {
 940                                         talloc_free(default_binding);
 941                                 }
 942                         }
 943                 }
 944         }
 945
 946         epmapper_binding = talloc_zero(c, struct dcerpc_binding);
 947         if (composite_nomem(epmapper_binding, c)) return c;
 948
 949         /* basic endpoint mapping data */
 950         epmapper_binding->transport             = binding->transport;
 951         epmapper_binding->host                  = talloc_reference(epmapper_binding, binding->host);
 952         epmapper_binding->target_hostname       = epmapper_binding->host;
 953         epmapper_binding->options               = NULL;
 954         epmapper_binding->flags                 = 0;
 955         epmapper_binding->assoc_group_id        = 0;
 956         epmapper_binding->endpoint              = NULL;
 957
 958         /* initiate rpc pipe connection */
 959         pipe_connect_req = dcerpc_pipe_connect_b_send(c, epmapper_binding, &dcerpc_table_epmapper,
 960                                                       anon_creds, c->event_ctx);
 961         if (composite_nomem(pipe_connect_req, c)) return c;
 962
 963         composite_continue(c, pipe_connect_req, continue_epm_recv_binding, c);
 964         return c;
 965 }
 966
 967
 968 /*
 969   Receive result of endpoint mapping request
 970  */
 971 NTSTATUS dcerpc_epm_map_binding_recv(struct composite_context *c)
 972 {
 973         NTSTATUS status = composite_wait(c);
 974
 975         talloc_free(c);
 976         return status;
 977 }
 978
 979
 980 /*
 981   Get endpoint mapping for rpc connection
 982 */
 983 NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding,
 984                                 const struct ndr_interface_table *table, struct event_context *ev)
 985 {
 986         struct composite_context *c;
 987
 988         c = dcerpc_epm_map_binding_send(mem_ctx, binding, table, ev);
 989         return dcerpc_epm_map_binding_recv(c);
 990 }
 991
 992
 993 struct pipe_auth_state {
 994         struct dcerpc_pipe *pipe;
 995         struct dcerpc_binding *binding;
 996         const struct ndr_interface_table *table;
 997         struct cli_credentials *credentials;
 998 };
 999
1000
1001 static void continue_auth_schannel(struct composite_context *ctx);
1002 static void continue_auth(struct composite_context *ctx);
1003 static void continue_auth_none(struct composite_context *ctx);
1004 static void continue_ntlmssp_connection(struct composite_context *ctx);
1005 static void continue_spnego_after_wrong_pass(struct composite_context *ctx);
1006
1007
1008 /*
1009   Stage 2 of pipe_auth: Receive result of schannel bind request
1010 */
1011 static void continue_auth_schannel(struct composite_context *ctx)
1012 {
1013         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1014                                                       struct composite_context);
1015
1016         c->status = dcerpc_bind_auth_schannel_recv(ctx);
1017         if (!composite_is_ok(c)) return;
1018
1019         composite_done(c);
1020 }
1021
1022
1023 /*
1024   Stage 2 of pipe_auth: Receive result of authenticated bind request
1025 */
1026 static void continue_auth(struct composite_context *ctx)
1027 {
1028         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1029                                                       struct composite_context);
1030
1031         c->status = dcerpc_bind_auth_recv(ctx);
1032         if (!composite_is_ok(c)) return;
1033
1034         composite_done(c);
1035 }
1036 /*
1037   Stage 2 of pipe_auth: Receive result of authenticated bind request, but handle fallbacks:
1038   SPNEGO -> NTLMSSP
1039 */
1040 static void continue_auth_auto(struct composite_context *ctx)
1041 {
1042         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1043                                                       struct composite_context);
1044         struct pipe_auth_state *s = talloc_get_type(c->private_data, struct pipe_auth_state);
1045         struct composite_context *sec_conn_req;
1046
1047         c->status = dcerpc_bind_auth_recv(ctx);
1048         if (NT_STATUS_EQUAL(c->status, NT_STATUS_INVALID_PARAMETER)) {
1049                 /*
1050                  * Retry with NTLMSSP auth as fallback
1051                  * send a request for secondary rpc connection
1052                  */
1053                 sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1054                                                                 s->binding);
1055                 composite_continue(c, sec_conn_req, continue_ntlmssp_connection, c);
1056                 return;
1057         } else if (NT_STATUS_EQUAL(c->status, NT_STATUS_LOGON_FAILURE)) {
1058                 if (cli_credentials_wrong_password(s->credentials)) {
1059                         /*
1060                          * Retry SPNEGO with a better password
1061                          * send a request for secondary rpc connection
1062                          */
1063                         sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1064                                                                         s->binding);
1065                         composite_continue(c, sec_conn_req, continue_spnego_after_wrong_pass, c);
1066                         return;
1067                 }
1068         }
1069
1070         if (!composite_is_ok(c)) return;
1071
1072         composite_done(c);
1073 }
1074
1075 /*
1076   Stage 3 of pipe_auth (fallback to NTLMSSP case): Receive secondary
1077   rpc connection (the first one can't be used any more, due to the
1078   bind nak) and perform authenticated bind request
1079 */
1080 static void continue_ntlmssp_connection(struct composite_context *ctx)
1081 {
1082         struct composite_context *c;
1083         struct pipe_auth_state *s;
1084         struct composite_context *auth_req;
1085         struct dcerpc_pipe *p2;
1086
1087         c = talloc_get_type(ctx->async.private_data, struct composite_context);
1088         s = talloc_get_type(c->private_data, struct pipe_auth_state);
1089
1090         /* receive secondary rpc connection */
1091         c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1092         if (!composite_is_ok(c)) return;
1093
1094         talloc_steal(s, p2);
1095         talloc_steal(p2, s->pipe);
1096         s->pipe = p2;
1097
1098         /* initiate a authenticated bind */
1099         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1100                                          s->credentials, DCERPC_AUTH_TYPE_NTLMSSP,
1101                                          dcerpc_auth_level(s->pipe->conn),
1102                                          s->table->authservices->names[0]);
1103         composite_continue(c, auth_req, continue_auth, c);
1104 }
1105
1106 /*
1107   Stage 3 of pipe_auth (retry on wrong password): Receive secondary
1108   rpc connection (the first one can't be used any more, due to the
1109   bind nak) and perform authenticated bind request
1110 */
1111 static void continue_spnego_after_wrong_pass(struct composite_context *ctx)
1112 {
1113         struct composite_context *c;
1114         struct pipe_auth_state *s;
1115         struct composite_context *auth_req;
1116         struct dcerpc_pipe *p2;
1117
1118         c = talloc_get_type(ctx->async.private_data, struct composite_context);
1119         s = talloc_get_type(c->private_data, struct pipe_auth_state);
1120
1121         /* receive secondary rpc connection */
1122         c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1123         if (!composite_is_ok(c)) return;
1124
1125         talloc_steal(s, p2);
1126         talloc_steal(p2, s->pipe);
1127         s->pipe = p2;
1128
1129         /* initiate a authenticated bind */
1130         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1131                                          s->credentials, DCERPC_AUTH_TYPE_SPNEGO,
1132                                          dcerpc_auth_level(s->pipe->conn),
1133                                          s->table->authservices->names[0]);
1134         composite_continue(c, auth_req, continue_auth, c);
1135 }
1136
1137
1138 /*
1139   Stage 2 of pipe_auth: Receive result of non-authenticated bind request
1140 */
1141 static void continue_auth_none(struct composite_context *ctx)
1142 {
1143         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1144                                                       struct composite_context);
1145
1146         c->status = dcerpc_bind_auth_none_recv(ctx);
1147         if (!composite_is_ok(c)) return;
1148
1149         composite_done(c);
1150 }
1151
1152
1153 /*
1154   Request to perform an authenticated bind if required. Authentication
1155   is determined using credentials passed and binding flags.
1156 */
1157 struct composite_context *dcerpc_pipe_auth_send(struct dcerpc_pipe *p,
1158                                                 struct dcerpc_binding *binding,
1159                                                 const struct ndr_interface_table *table,
1160                                                 struct cli_credentials *credentials)
1161 {
1162         struct composite_context *c;
1163         struct pipe_auth_state *s;
1164         struct composite_context *auth_schannel_req;
1165         struct composite_context *auth_req;
1166         struct composite_context *auth_none_req;
1167         struct dcerpc_connection *conn;
1168         uint8_t auth_type;
1169
1170         /* composite context allocation and setup */
1171         c = composite_create(p, p->conn->event_ctx);
1172         if (c == NULL) return NULL;
1173
1174         s = talloc_zero(c, struct pipe_auth_state);
1175         if (composite_nomem(s, c)) return c;
1176         c->private_data = s;
1177
1178         /* store parameters in state structure */
1179         s->binding      = binding;
1180         s->table        = table;
1181         s->credentials  = credentials;
1182         s->pipe         = p;
1183
1184         conn = s->pipe->conn;
1185         conn->flags = binding->flags;
1186
1187         /* remember the binding string for possible secondary connections */
1188         conn->binding_string = dcerpc_binding_string(p, binding);
1189
1190         if (cli_credentials_is_anonymous(s->credentials)) {
1191                 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1192                 composite_continue(c, auth_none_req, continue_auth_none, c);
1193                 return c;
1194         }
1195
1196         if ((binding->flags & DCERPC_SCHANNEL) &&
1197             !cli_credentials_get_netlogon_creds(s->credentials)) {
1198                 /* If we don't already have netlogon credentials for
1199                  * the schannel bind, then we have to get these
1200                  * first */
1201                 auth_schannel_req = dcerpc_bind_auth_schannel_send(c, s->pipe, s->table,
1202                                                                    s->credentials,
1203                                                                    dcerpc_auth_level(conn));
1204                 composite_continue(c, auth_schannel_req, continue_auth_schannel, c);
1205                 return c;
1206         }
1207
1208         /*
1209          * we rely on the already authenticated CIFS connection
1210          * if not doing sign or seal
1211          */
1212         if (conn->transport.transport == NCACN_NP &&
1213             !(s->binding->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1214                 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1215                 composite_continue(c, auth_none_req, continue_auth_none, c);
1216                 return c;
1217         }
1218
1219
1220         /* Perform an authenticated DCE-RPC bind
1221          */
1222         if (!(conn->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1223                 /*
1224                   we are doing an authenticated connection,
1225                   but not using sign or seal. We must force
1226                   the CONNECT dcerpc auth type as a NONE auth
1227                   type doesn't allow authentication
1228                   information to be passed.
1229                 */
1230                 conn->flags |= DCERPC_CONNECT;
1231         }
1232
1233         if (s->binding->flags & DCERPC_AUTH_SPNEGO) {
1234                 auth_type = DCERPC_AUTH_TYPE_SPNEGO;
1235
1236         } else if (s->binding->flags & DCERPC_AUTH_KRB5) {
1237                 auth_type = DCERPC_AUTH_TYPE_KRB5;
1238
1239         } else if (s->binding->flags & DCERPC_SCHANNEL) {
1240                 auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
1241
1242         } else if (s->binding->flags & DCERPC_AUTH_NTLM) {
1243                 auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
1244
1245         } else {
1246                 /* try SPNEGO with fallback to NTLMSSP */
1247                 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1248                                                  s->credentials, DCERPC_AUTH_TYPE_SPNEGO,
1249                                                  dcerpc_auth_level(conn),
1250                                                  s->table->authservices->names[0]);
1251                 composite_continue(c, auth_req, continue_auth_auto, c);
1252                 return c;
1253         }
1254
1255         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1256                                          s->credentials, auth_type,
1257                                          dcerpc_auth_level(conn),
1258                                          s->table->authservices->names[0]);
1259         composite_continue(c, auth_req, continue_auth, c);
1260         return c;
1261 }
1262
1263
1264 /*
1265   Receive result of authenticated bind request on dcerpc pipe
1266
1267   This returns *p, which may be different to the one originally
1268   supllied, as it rebinds to a new pipe due to authentication fallback
1269
1270 */
1271 NTSTATUS dcerpc_pipe_auth_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1272                                struct dcerpc_pipe **p)
1273 {
1274         NTSTATUS status;
1275
1276         struct pipe_auth_state *s = talloc_get_type(c->private_data,
1277                                                     struct pipe_auth_state);
1278         status = composite_wait(c);
1279         if (!NT_STATUS_IS_OK(status)) {
1280                 char *uuid_str = GUID_string(s->pipe, &s->table->syntax_id.uuid);
1281                 DEBUG(0, ("Failed to bind to uuid %s - %s\n", uuid_str, nt_errstr(status)));
1282                 talloc_free(uuid_str);
1283         } else {
1284                 talloc_steal(mem_ctx, s->pipe);
1285                 *p = s->pipe;
1286         }
1287
1288         talloc_free(c);
1289         return status;
1290 }
1291
1292
1293 /*
1294    Perform an authenticated bind if needed - sync version
1295
1296    This may change *p, as it rebinds to a new pipe due to authentication fallback
1297 */
1298 NTSTATUS dcerpc_pipe_auth(TALLOC_CTX *mem_ctx,
1299                           struct dcerpc_pipe **p,
1300                           struct dcerpc_binding *binding,
1301                           const struct ndr_interface_table *table,
1302                           struct cli_credentials *credentials)
1303 {
1304         struct composite_context *c;
1305
1306         c = dcerpc_pipe_auth_send(*p, binding, table, credentials);
1307         return dcerpc_pipe_auth_recv(c, mem_ctx, p);
1308 }
1309
1310
1311 NTSTATUS dcerpc_generic_session_key(struct dcerpc_connection *c,
1312                                     DATA_BLOB *session_key)
1313 {
1314         /* this took quite a few CPU cycles to find ... */
1315         session_key->data = discard_const_p(unsigned char, "SystemLibraryDTC");
1316         session_key->length = 16;
1317         return NT_STATUS_OK;
1318 }
1319
1320 /*
1321   fetch the user session key - may be default (above) or the SMB session key
1322 */
1323 NTSTATUS dcerpc_fetch_session_key(struct dcerpc_pipe *p,
1324                                   DATA_BLOB *session_key)
1325 {
1326         return p->conn->security_state.session_key(p->conn, session_key);
1327 }
1328
1329
1330 /*
1331   log a rpc packet in a format suitable for ndrdump. This is especially useful
1332   for sealed packets, where ethereal cannot easily see the contents
1333
1334   this triggers on a debug level of >= 10
1335 */
1336 void dcerpc_log_packet(const struct ndr_interface_table *ndr,
1337                        uint32_t opnum, uint32_t flags, DATA_BLOB *pkt)
1338 {
1339         const int num_examples = 20;
1340         int i;
1341
1342         if (DEBUGLEVEL < 10) return;
1343
1344         for (i=0;i<num_examples;i++) {
1345                 char *name=NULL;
1346                 asprintf(&name, "%s/rpclog/%s-%u.%d.%s",
1347                          lp_lockdir(), ndr->name, opnum, i,
1348                          (flags&NDR_IN)?"in":"out");
1349                 if (name == NULL) {
1350                         return;
1351                 }
1352                 if (!file_exist(name)) {
1353                         if (file_save(name, pkt->data, pkt->length)) {
1354                                 DEBUG(10,("Logged rpc packet to %s\n", name));
1355                         }
1356                         free(name);
1357                         break;
1358                 }
1359                 free(name);
1360         }
1361 }
1362
1363
1364
1365 /*
1366   create a secondary context from a primary connection
1367
1368   this uses dcerpc_alter_context() to create a new dcerpc context_id
1369 */
1370 NTSTATUS dcerpc_secondary_context(struct dcerpc_pipe *p,
1371                                   struct dcerpc_pipe **pp2,
1372                                   const struct ndr_interface_table *table)
1373 {
1374         NTSTATUS status;
1375         struct dcerpc_pipe *p2;
1376
1377         p2 = talloc_zero(p, struct dcerpc_pipe);
1378         if (p2 == NULL) {
1379                 return NT_STATUS_NO_MEMORY;
1380         }
1381         p2->conn = talloc_reference(p2, p->conn);
1382         p2->request_timeout = p->request_timeout;
1383
1384         p2->context_id = ++p->conn->next_context_id;
1385
1386         p2->syntax = table->syntax_id;
1387
1388         p2->transfer_syntax = ndr_transfer_syntax;
1389
1390         p2->binding = talloc_reference(p2, p->binding);
1391
1392         status = dcerpc_alter_context(p2, p2, &p2->syntax, &p2->transfer_syntax);
1393         if (!NT_STATUS_IS_OK(status)) {
1394                 talloc_free(p2);
1395                 return status;
1396         }
1397
1398         *pp2 = p2;
1399
1400         return status;
1401 }