source4/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 #include "param/param.h"
  33
  34 /*
  35   find a dcerpc call on an interface by name
  36 */
  37 const struct ndr_interface_call *dcerpc_iface_find_call(const struct ndr_interface_table *iface,
  38                                                         const char *name)
  39 {
  40         int i;
  41         for (i=0;i<iface->num_calls;i++) {
  42                 if (strcmp(iface->calls[i].name, name) == 0) {
  43                         return &iface->calls[i];
  44                 }
  45         }
  46         return NULL;
  47 }
  48
  49 /*
  50    push a ncacn_packet into a blob, potentially with auth info
  51 */
  52 NTSTATUS ncacn_push_auth(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
  53                           struct ncacn_packet *pkt,
  54                           struct dcerpc_auth *auth_info)
  55 {
  56         NTSTATUS status;
  57         struct ndr_push *ndr;
  58
  59         ndr = ndr_push_init_ctx(mem_ctx);
  60         if (!ndr) {
  61                 return NT_STATUS_NO_MEMORY;
  62         }
  63
  64         if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
  65                 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
  66         }
  67
  68         if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
  69                 ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
  70         }
  71
  72         if (auth_info) {
  73                 pkt->auth_length = auth_info->credentials.length;
  74         } else {
  75                 pkt->auth_length = 0;
  76         }
  77
  78         status = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
  79         if (!NT_STATUS_IS_OK(status)) {
  80                 return status;
  81         }
  82
  83         if (auth_info) {
  84                 status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info);
  85         }
  86
  87         *blob = ndr_push_blob(ndr);
  88
  89         /* fill in the frag length */
  90         dcerpc_set_frag_length(blob, blob->length);
  91
  92         return NT_STATUS_OK;
  93 }
  94
  95 #define MAX_PROTSEQ             10
  96
  97 static const struct {
  98         const char *name;
  99         enum dcerpc_transport_t transport;
 100         int num_protocols;
 101         enum epm_protocol protseq[MAX_PROTSEQ];
 102 } transports[] = {
 103         { "ncacn_np",     NCACN_NP, 3,
 104                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
 105         { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
 106                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
 107         { "ncacn_http", NCACN_HTTP, 3,
 108                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
 109         { "ncadg_ip_udp", NCACN_IP_UDP, 3,
 110                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
 111         { "ncalrpc", NCALRPC, 2,
 112                 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE } },
 113         { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
 114                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
 115         { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
 116                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
 117         { "ncacn_at_dsp", NCACN_AT_DSP, 3,
 118                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
 119         { "ncadg_at_ddp", NCADG_AT_DDP, 3,
 120                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
 121         { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
 122                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
 123         { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
 124                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
 125         { "ncadg_ipx", NCADG_IPX, 2,
 126                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
 127         },
 128         { "ncacn_spx", NCACN_SPX, 3,
 129                 /* I guess some MS programmer confused the identifier for
 130                  * EPM_PROTOCOL_UUID (0x0D or 13) with the one for
 131                  * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/
 132                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID },
 133         },
 134 };
 135
 136 static const struct {
 137         const char *name;
 138         uint32_t flag;
 139 } ncacn_options[] = {
 140         {"sign", DCERPC_SIGN},
 141         {"seal", DCERPC_SEAL},
 142         {"connect", DCERPC_CONNECT},
 143         {"spnego", DCERPC_AUTH_SPNEGO},
 144         {"ntlm", DCERPC_AUTH_NTLM},
 145         {"krb5", DCERPC_AUTH_KRB5},
 146         {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
 147         {"print", DCERPC_DEBUG_PRINT_BOTH},
 148         {"padcheck", DCERPC_DEBUG_PAD_CHECK},
 149         {"bigendian", DCERPC_PUSH_BIGENDIAN},
 150         {"smb2", DCERPC_SMB2}
 151 };
 152
 153 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 154 {
 155         struct ndr_syntax_id syntax;
 156         NTSTATUS status;
 157
 158         switch(epm_floor->lhs.protocol) {
 159                 case EPM_PROTOCOL_UUID:
 160                         status = dcerpc_floor_get_lhs_data(epm_floor, &syntax);
 161                         if (NT_STATUS_IS_OK(status)) {
 162                                 /* lhs is used: UUID */
 163                                 char *uuidstr;
 164
 165                                 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax.uuid)) {
 166                                         return "NDR";
 167                                 }
 168
 169                                 if (GUID_equal(&syntax.uuid, &ndr64_transfer_syntax.uuid)) {
 170                                         return "NDR64";
 171                                 }
 172
 173                                 uuidstr = GUID_string(mem_ctx, &syntax.uuid);
 174
 175                                 return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.if_version);
 176                         } else { /* IPX */
 177                                 return talloc_asprintf(mem_ctx, "IPX:%s",
 178                                                 data_blob_hex_string(mem_ctx, &epm_floor->rhs.uuid.unknown));
 179                         }
 180
 181                 case EPM_PROTOCOL_NCACN:
 182                         return "RPC-C";
 183
 184                 case EPM_PROTOCOL_NCADG:
 185                         return "RPC";
 186
 187                 case EPM_PROTOCOL_NCALRPC:
 188                         return "NCALRPC";
 189
 190                 case EPM_PROTOCOL_DNET_NSP:
 191                         return "DNET/NSP";
 192
 193                 case EPM_PROTOCOL_IP:
 194                         return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr);
 195
 196                 case EPM_PROTOCOL_PIPE:
 197                         return talloc_asprintf(mem_ctx, "PIPE:%s", epm_floor->rhs.pipe.path);
 198
 199                 case EPM_PROTOCOL_SMB:
 200                         return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc);
 201
 202                 case EPM_PROTOCOL_UNIX_DS:
 203                         return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path);
 204
 205                 case EPM_PROTOCOL_NETBIOS:
 206                         return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name);
 207
 208                 case EPM_PROTOCOL_NETBEUI:
 209                         return "NETBeui";
 210
 211                 case EPM_PROTOCOL_SPX:
 212                         return "SPX";
 213
 214                 case EPM_PROTOCOL_NB_IPX:
 215                         return "NB_IPX";
 216
 217                 case EPM_PROTOCOL_HTTP:
 218                         return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port);
 219
 220                 case EPM_PROTOCOL_TCP:
 221                         return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port);
 222
 223                 case EPM_PROTOCOL_UDP:
 224                         return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port);
 225
 226                 default:
 227                         return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol);
 228         }
 229 }
 230
 231
 232 /*
 233   form a binding string from a binding structure
 234 */
 235 char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
 236 {
 237         char *s = talloc_strdup(mem_ctx, "");
 238         int i;
 239         const char *t_name = NULL;
 240
 241         if (b->transport != NCA_UNKNOWN) {
 242                 for (i=0;i<ARRAY_SIZE(transports);i++) {
 243                         if (transports[i].transport == b->transport) {
 244                                 t_name = transports[i].name;
 245                         }
 246                 }
 247                 if (!t_name) {
 248                         return NULL;
 249                 }
 250         }
 251
 252         if (!GUID_all_zero(&b->object.uuid)) {
 253                 s = talloc_asprintf(s, "%s@",
 254                                     GUID_string(mem_ctx, &b->object.uuid));
 255         }
 256
 257         if (t_name != NULL) {
 258                 s = talloc_asprintf_append_buffer(s, "%s:", t_name);
 259                 if (s == NULL) {
 260                         return NULL;
 261                 }
 262         }
 263
 264         if (b->host) {
 265                 s = talloc_asprintf_append_buffer(s, "%s", b->host);
 266         }
 267
 268         if (!b->endpoint && !b->options && !b->flags) {
 269                 return s;
 270         }
 271
 272         s = talloc_asprintf_append_buffer(s, "[");
 273
 274         if (b->endpoint) {
 275                 s = talloc_asprintf_append_buffer(s, "%s", b->endpoint);
 276         }
 277
 278         /* this is a *really* inefficent way of dealing with strings,
 279            but this is rarely called and the strings are always short,
 280            so I don't care */
 281         for (i=0;b->options && b->options[i];i++) {
 282                 s = talloc_asprintf_append_buffer(s, ",%s", b->options[i]);
 283                 if (!s) return NULL;
 284         }
 285
 286         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 287                 if (b->flags & ncacn_options[i].flag) {
 288                         s = talloc_asprintf_append_buffer(s, ",%s", ncacn_options[i].name);
 289                         if (!s) return NULL;
 290                 }
 291         }
 292
 293         s = talloc_asprintf_append_buffer(s, "]");
 294
 295         return s;
 296 }
 297
 298 /*
 299   parse a binding string into a dcerpc_binding structure
 300 */
 301 NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
 302 {
 303         struct dcerpc_binding *b;
 304         char *options;
 305         char *p;
 306         int i, j, comma_count;
 307
 308         b = talloc(mem_ctx, struct dcerpc_binding);
 309         if (!b) {
 310                 return NT_STATUS_NO_MEMORY;
 311         }
 312
 313         p = strchr(s, '@');
 314
 315         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 316                 NTSTATUS status;
 317
 318                 status = GUID_from_string(s, &b->object.uuid);
 319
 320                 if (NT_STATUS_IS_ERR(status)) {
 321                         DEBUG(0, ("Failed parsing UUID\n"));
 322                         return status;
 323                 }
 324
 325                 s = p + 1;
 326         } else {
 327                 ZERO_STRUCT(b->object);
 328         }
 329
 330         b->object.if_version = 0;
 331
 332         p = strchr(s, ':');
 333
 334         if (p == NULL) {
 335                 b->transport = NCA_UNKNOWN;
 336         } else {
 337                 char *type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 338                 if (!type) {
 339                         return NT_STATUS_NO_MEMORY;
 340                 }
 341
 342                 for (i=0;i<ARRAY_SIZE(transports);i++) {
 343                         if (strcasecmp(type, transports[i].name) == 0) {
 344                                 b->transport = transports[i].transport;
 345                                 break;
 346                         }
 347                 }
 348
 349                 if (i==ARRAY_SIZE(transports)) {
 350                         DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 351                         return NT_STATUS_INVALID_PARAMETER;
 352                 }
 353
 354                 talloc_free(type);
 355
 356                 s = p+1;
 357         }
 358
 359         p = strchr(s, '[');
 360         if (p) {
 361                 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
 362                 options = talloc_strdup(mem_ctx, p+1);
 363                 if (options[strlen(options)-1] != ']') {
 364                         return NT_STATUS_INVALID_PARAMETER;
 365                 }
 366                 options[strlen(options)-1] = 0;
 367         } else {
 368                 b->host = talloc_strdup(b, s);
 369                 options = NULL;
 370         }
 371         if (!b->host) {
 372                 return NT_STATUS_NO_MEMORY;
 373         }
 374
 375         b->target_hostname = b->host;
 376
 377         b->options = NULL;
 378         b->flags = 0;
 379         b->assoc_group_id = 0;
 380         b->endpoint = NULL;
 381
 382         if (!options) {
 383                 *b_out = b;
 384                 return NT_STATUS_OK;
 385         }
 386
 387         comma_count = count_chars(options, ',');
 388
 389         b->options = talloc_array(b, const char *, comma_count+2);
 390         if (!b->options) {
 391                 return NT_STATUS_NO_MEMORY;
 392         }
 393
 394         for (i=0; (p = strchr(options, ',')); i++) {
 395                 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
 396                 if (!b->options[i]) {
 397                         return NT_STATUS_NO_MEMORY;
 398                 }
 399                 options = p+1;
 400         }
 401         b->options[i] = options;
 402         b->options[i+1] = NULL;
 403
 404         /* some options are pre-parsed for convenience */
 405         for (i=0;b->options[i];i++) {
 406                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 407                         if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
 408                                 int k;
 409                                 b->flags |= ncacn_options[j].flag;
 410                                 for (k=i;b->options[k];k++) {
 411                                         b->options[k] = b->options[k+1];
 412                                 }
 413                                 i--;
 414                                 break;
 415                         }
 416                 }
 417         }
 418
 419         if (b->options[0]) {
 420                 /* Endpoint is first option */
 421                 b->endpoint = b->options[0];
 422                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 423
 424                 for (i=0;b->options[i];i++) {
 425                         b->options[i] = b->options[i+1];
 426                 }
 427         }
 428
 429         if (b->options[0] == NULL)
 430                 b->options = NULL;
 431
 432         *b_out = b;
 433         return NT_STATUS_OK;
 434 }
 435
 436 NTSTATUS dcerpc_floor_get_lhs_data(struct epm_floor *epm_floor, struct ndr_syntax_id *syntax)
 437 {
 438         TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
 439         struct ndr_pull *ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx);
 440         NTSTATUS status;
 441         uint16_t if_version=0;
 442
 443         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 444
 445         status = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 446         if (NT_STATUS_IS_ERR(status)) {
 447                 talloc_free(mem_ctx);
 448                 return status;
 449         }
 450
 451         status = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
 452         syntax->if_version = if_version;
 453
 454         talloc_free(mem_ctx);
 455
 456         return status;
 457 }
 458
 459 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
 460 {
 461         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 462
 463         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 464
 465         ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 466         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
 467
 468         return ndr_push_blob(ndr);
 469 }
 470
 471 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 472 {
 473         switch (epm_floor->lhs.protocol) {
 474         case EPM_PROTOCOL_TCP:
 475                 if (epm_floor->rhs.tcp.port == 0) return NULL;
 476                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
 477
 478         case EPM_PROTOCOL_UDP:
 479                 if (epm_floor->rhs.udp.port == 0) return NULL;
 480                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
 481
 482         case EPM_PROTOCOL_HTTP:
 483                 if (epm_floor->rhs.http.port == 0) return NULL;
 484                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
 485
 486         case EPM_PROTOCOL_IP:
 487                 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
 488
 489         case EPM_PROTOCOL_NCACN:
 490                 return NULL;
 491
 492         case EPM_PROTOCOL_NCADG:
 493                 return NULL;
 494
 495         case EPM_PROTOCOL_SMB:
 496                 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
 497                 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
 498
 499         case EPM_PROTOCOL_PIPE:
 500                 if (strlen(epm_floor->rhs.pipe.path) == 0) return NULL;
 501                 return talloc_strdup(mem_ctx, epm_floor->rhs.pipe.path);
 502
 503         case EPM_PROTOCOL_NETBIOS:
 504                 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
 505                 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
 506
 507         case EPM_PROTOCOL_NCALRPC:
 508                 return NULL;
 509
 510         case EPM_PROTOCOL_VINES_SPP:
 511                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
 512
 513         case EPM_PROTOCOL_VINES_IPC:
 514                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
 515
 516         case EPM_PROTOCOL_STREETTALK:
 517                 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
 518
 519         case EPM_PROTOCOL_UNIX_DS:
 520                 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
 521                 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
 522
 523         case EPM_PROTOCOL_NULL:
 524                 return NULL;
 525
 526         default:
 527                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 528                 break;
 529         }
 530
 531         return NULL;
 532 }
 533
 534 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx,
 535                                           struct epm_floor *epm_floor,
 536                                           const char *data)
 537 {
 538         switch (epm_floor->lhs.protocol) {
 539         case EPM_PROTOCOL_TCP:
 540                 epm_floor->rhs.tcp.port = atoi(data);
 541                 return NT_STATUS_OK;
 542
 543         case EPM_PROTOCOL_UDP:
 544                 epm_floor->rhs.udp.port = atoi(data);
 545                 return NT_STATUS_OK;
 546
 547         case EPM_PROTOCOL_HTTP:
 548                 epm_floor->rhs.http.port = atoi(data);
 549                 return NT_STATUS_OK;
 550
 551         case EPM_PROTOCOL_IP:
 552                 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
 553                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
 554                 return NT_STATUS_OK;
 555
 556         case EPM_PROTOCOL_NCACN:
 557                 epm_floor->rhs.ncacn.minor_version = 0;
 558                 return NT_STATUS_OK;
 559
 560         case EPM_PROTOCOL_NCADG:
 561                 epm_floor->rhs.ncadg.minor_version = 0;
 562                 return NT_STATUS_OK;
 563
 564         case EPM_PROTOCOL_SMB:
 565                 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 566                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
 567                 return NT_STATUS_OK;
 568
 569         case EPM_PROTOCOL_PIPE:
 570                 epm_floor->rhs.pipe.path = talloc_strdup(mem_ctx, data);
 571                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.pipe.path);
 572                 return NT_STATUS_OK;
 573
 574         case EPM_PROTOCOL_NETBIOS:
 575                 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 576                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
 577                 return NT_STATUS_OK;
 578
 579         case EPM_PROTOCOL_NCALRPC:
 580                 return NT_STATUS_OK;
 581
 582         case EPM_PROTOCOL_VINES_SPP:
 583                 epm_floor->rhs.vines_spp.port = atoi(data);
 584                 return NT_STATUS_OK;
 585
 586         case EPM_PROTOCOL_VINES_IPC:
 587                 epm_floor->rhs.vines_ipc.port = atoi(data);
 588                 return NT_STATUS_OK;
 589
 590         case EPM_PROTOCOL_STREETTALK:
 591                 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 592                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
 593                 return NT_STATUS_OK;
 594
 595         case EPM_PROTOCOL_UNIX_DS:
 596                 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 597                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
 598                 return NT_STATUS_OK;
 599
 600         case EPM_PROTOCOL_NULL:
 601                 return NT_STATUS_OK;
 602
 603         default:
 604                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 605                 break;
 606         }
 607
 608         return NT_STATUS_NOT_SUPPORTED;
 609 }
 610
 611 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 612 {
 613         int i;
 614
 615         /* Find a transport that has 'prot' as 4th protocol */
 616         for (i=0;i<ARRAY_SIZE(transports);i++) {
 617                 if (transports[i].num_protocols >= 2 &&
 618                         transports[i].protseq[1] == prot) {
 619                         return transports[i].transport;
 620                 }
 621         }
 622
 623         /* Unknown transport */
 624         return (unsigned int)-1;
 625 }
 626
 627 enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower)
 628 {
 629         int i;
 630
 631         /* Find a transport that matches this tower */
 632         for (i=0;i<ARRAY_SIZE(transports);i++) {
 633                 int j;
 634                 if (transports[i].num_protocols != tower->num_floors - 2) {
 635                         continue;
 636                 }
 637
 638                 for (j = 0; j < transports[i].num_protocols; j++) {
 639                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 640                                 break;
 641                         }
 642                 }
 643
 644                 if (j == transports[i].num_protocols) {
 645                         return transports[i].transport;
 646                 }
 647         }
 648
 649         /* Unknown transport */
 650         return (unsigned int)-1;
 651 }
 652
 653 NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx,
 654                                    struct epm_tower *tower,
 655                                    struct dcerpc_binding **b_out)
 656 {
 657         NTSTATUS status;
 658         struct dcerpc_binding *binding;
 659
 660         binding = talloc(mem_ctx, struct dcerpc_binding);
 661         NT_STATUS_HAVE_NO_MEMORY(binding);
 662
 663         ZERO_STRUCT(binding->object);
 664         binding->options = NULL;
 665         binding->host = NULL;
 666         binding->target_hostname = NULL;
 667         binding->flags = 0;
 668         binding->assoc_group_id = 0;
 669
 670         binding->transport = dcerpc_transport_by_tower(tower);
 671
 672         if (binding->transport == (unsigned int)-1) {
 673                 return NT_STATUS_NOT_SUPPORTED;
 674         }
 675
 676         if (tower->num_floors < 1) {
 677                 return NT_STATUS_OK;
 678         }
 679
 680         /* Set object uuid */
 681         status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
 682
 683         if (!NT_STATUS_IS_OK(status)) {
 684                 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
 685                 return status;
 686         }
 687
 688         /* Ignore floor 1, it contains the NDR version info */
 689
 690         binding->options = NULL;
 691
 692         /* Set endpoint */
 693         if (tower->num_floors >= 4) {
 694                 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
 695         } else {
 696                 binding->endpoint = NULL;
 697         }
 698
 699         /* Set network address */
 700         if (tower->num_floors >= 5) {
 701                 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
 702                 NT_STATUS_HAVE_NO_MEMORY(binding->host);
 703                 binding->target_hostname = binding->host;
 704         }
 705         *b_out = binding;
 706         return NT_STATUS_OK;
 707 }
 708
 709 NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower)
 710 {
 711         const enum epm_protocol *protseq = NULL;
 712         int num_protocols = -1, i;
 713         NTSTATUS status;
 714
 715         /* Find transport */
 716         for (i=0;i<ARRAY_SIZE(transports);i++) {
 717                 if (transports[i].transport == binding->transport) {
 718                         protseq = transports[i].protseq;
 719                         num_protocols = transports[i].num_protocols;
 720                         break;
 721                 }
 722         }
 723
 724         if (num_protocols == -1) {
 725                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 726                 return NT_STATUS_UNSUCCESSFUL;
 727         }
 728
 729         tower->num_floors = 2 + num_protocols;
 730         tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
 731
 732         /* Floor 0 */
 733         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 734
 735         tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &binding->object);
 736
 737         tower->floors[0].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 738
 739         /* Floor 1 */
 740         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 741
 742         tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx,
 743                                                                 &ndr_transfer_syntax);
 744
 745         tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 746
 747         /* Floor 2 to num_protocols */
 748         for (i = 0; i < num_protocols; i++) {
 749                 tower->floors[2 + i].lhs.protocol = protseq[i];
 750                 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(mem_ctx, NULL, 0);
 751                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 752                 dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], "");
 753         }
 754
 755         /* The 4th floor contains the endpoint */
 756         if (num_protocols >= 2 && binding->endpoint) {
 757                 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint);
 758                 if (NT_STATUS_IS_ERR(status)) {
 759                         return status;
 760                 }
 761         }
 762
 763         /* The 5th contains the network address */
 764         if (num_protocols >= 3 && binding->host) {
 765                 if (is_ipaddress(binding->host)) {
 766                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 767                                                            binding->host);
 768                 } else {
 769                         /* note that we don't attempt to resolve the
 770                            name here - when we get a hostname here we
 771                            are in the client code, and want to put in
 772                            a wildcard all-zeros IP for the server to
 773                            fill in */
 774                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 775                                                            "0.0.0.0");
 776                 }
 777                 if (NT_STATUS_IS_ERR(status)) {
 778                         return status;
 779                 }
 780         }
 781
 782         return NT_STATUS_OK;
 783 }
 784
 785
 786 struct epm_map_binding_state {
 787         struct dcerpc_binding *binding;
 788         const struct ndr_interface_table *table;
 789         struct dcerpc_pipe *pipe;
 790         struct policy_handle handle;
 791         struct GUID guid;
 792         struct epm_twr_t twr;
 793         struct epm_twr_t *twr_r;
 794         struct epm_Map r;
 795 };
 796
 797
 798 static void continue_epm_recv_binding(struct composite_context *ctx);
 799 static void continue_epm_map(struct rpc_request *req);
 800
 801
 802 /*
 803   Stage 2 of epm_map_binding: Receive connected rpc pipe and send endpoint
 804   mapping rpc request
 805 */
 806 static void continue_epm_recv_binding(struct composite_context *ctx)
 807 {
 808         struct rpc_request *map_req;
 809
 810         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 811                                                       struct composite_context);
 812         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 813                                                           struct epm_map_binding_state);
 814
 815         /* receive result of rpc pipe connect request */
 816         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 817         if (!composite_is_ok(c)) return;
 818
 819         s->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
 820
 821         /* prepare requested binding parameters */
 822         s->binding->object         = s->table->syntax_id;
 823
 824         c->status = dcerpc_binding_build_tower(s->pipe, s->binding, &s->twr.tower);
 825         if (!composite_is_ok(c)) return;
 826
 827         /* with some nice pretty paper around it of course */
 828         s->r.in.object        = &s->guid;
 829         s->r.in.map_tower     = &s->twr;
 830         s->r.in.entry_handle  = &s->handle;
 831         s->r.in.max_towers    = 1;
 832         s->r.out.entry_handle = &s->handle;
 833
 834         /* send request for an endpoint mapping - a rpc request on connected pipe */
 835         map_req = dcerpc_epm_Map_send(s->pipe, c, &s->r);
 836         if (composite_nomem(map_req, c)) return;
 837
 838         composite_continue_rpc(c, map_req, continue_epm_map, c);
 839 }
 840
 841
 842 /*
 843   Stage 3 of epm_map_binding: Receive endpoint mapping and provide binding details
 844 */
 845 static void continue_epm_map(struct rpc_request *req)
 846 {
 847         struct composite_context *c = talloc_get_type(req->async.private_data,
 848                                                       struct composite_context);
 849         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 850                                                           struct epm_map_binding_state);
 851
 852         /* receive result of a rpc request */
 853         c->status = dcerpc_ndr_request_recv(req);
 854         if (!composite_is_ok(c)) return;
 855
 856         /* check the details */
 857         if (s->r.out.result != 0 || *s->r.out.num_towers != 1) {
 858                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 859                 return;
 860         }
 861
 862         s->twr_r = s->r.out.towers[0].twr;
 863         if (s->twr_r == NULL) {
 864                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 865                 return;
 866         }
 867
 868         if (s->twr_r->tower.num_floors != s->twr.tower.num_floors ||
 869             s->twr_r->tower.floors[3].lhs.protocol != s->twr.tower.floors[3].lhs.protocol) {
 870                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 871                 return;
 872         }
 873
 874         /* get received endpoint */
 875         s->binding->endpoint = talloc_reference(s->binding,
 876                                                 dcerpc_floor_get_rhs_data(c, &s->twr_r->tower.floors[3]));
 877         if (composite_nomem(s->binding->endpoint, c)) return;
 878
 879         composite_done(c);
 880 }
 881
 882
 883 /*
 884   Request for endpoint mapping of dcerpc binding - try to request for endpoint
 885   unless there is default one.
 886 */
 887 struct composite_context *dcerpc_epm_map_binding_send(TALLOC_CTX *mem_ctx,
 888                                                       struct dcerpc_binding *binding,
 889                                                       const struct ndr_interface_table *table,
 890                                                       struct event_context *ev)
 891 {
 892         struct composite_context *c;
 893         struct epm_map_binding_state *s;
 894         struct composite_context *pipe_connect_req;
 895         struct cli_credentials *anon_creds;
 896         struct event_context *new_ev = NULL;
 897
 898         NTSTATUS status;
 899         struct dcerpc_binding *epmapper_binding;
 900         int i;
 901
 902         /* Try to find event context in memory context in case passed
 903          * event_context (argument) was NULL. If there's none, just
 904          * create a new one.
 905          */
 906         if (ev == NULL) {
 907                 ev = event_context_find(mem_ctx);
 908                 if (ev == NULL) {
 909                         new_ev = event_context_init(mem_ctx);
 910                         if (new_ev == NULL) return NULL;
 911                         ev = new_ev;
 912                 }
 913         }
 914
 915         /* composite context allocation and setup */
 916         c = composite_create(mem_ctx, ev);
 917         if (c == NULL) {
 918                 talloc_free(new_ev);
 919                 return NULL;
 920         }
 921         talloc_steal(c, new_ev);
 922
 923         s = talloc_zero(c, struct epm_map_binding_state);
 924         if (composite_nomem(s, c)) return c;
 925         c->private_data = s;
 926
 927         s->binding = binding;
 928         s->table   = table;
 929
 930         /* anonymous credentials for rpc connection used to get endpoint mapping */
 931         anon_creds = cli_credentials_init(mem_ctx);
 932         cli_credentials_set_event_context(anon_creds, ev);
 933         cli_credentials_set_conf(anon_creds);
 934         cli_credentials_set_anonymous(anon_creds);
 935
 936         /*
 937           First, check if there is a default endpoint specified in the IDL
 938         */
 939         if (table != NULL) {
 940                 struct dcerpc_binding *default_binding;
 941
 942                 /* Find one of the default pipes for this interface */
 943                 for (i = 0; i < table->endpoints->count; i++) {
 944                         status = dcerpc_parse_binding(mem_ctx, table->endpoints->names[i], &default_binding);
 945
 946                         if (NT_STATUS_IS_OK(status)) {
 947                                 if (binding->transport == NCA_UNKNOWN)
 948                                         binding->transport = default_binding->transport;
 949                                 if (default_binding->transport == binding->transport &&
 950                                         default_binding->endpoint) {
 951                                         binding->endpoint = talloc_reference(binding, default_binding->endpoint);
 952                                         talloc_free(default_binding);
 953
 954                                         composite_done(c);
 955                                         return c;
 956
 957                                 } else {
 958                                         talloc_free(default_binding);
 959                                 }
 960                         }
 961                 }
 962         }
 963
 964         epmapper_binding = talloc_zero(c, struct dcerpc_binding);
 965         if (composite_nomem(epmapper_binding, c)) return c;
 966
 967         /* basic endpoint mapping data */
 968         epmapper_binding->transport             = binding->transport;
 969         epmapper_binding->host                  = talloc_reference(epmapper_binding, binding->host);
 970         epmapper_binding->target_hostname       = epmapper_binding->host;
 971         epmapper_binding->options               = NULL;
 972         epmapper_binding->flags                 = 0;
 973         epmapper_binding->assoc_group_id        = 0;
 974         epmapper_binding->endpoint              = NULL;
 975
 976         /* initiate rpc pipe connection */
 977         pipe_connect_req = dcerpc_pipe_connect_b_send(c, epmapper_binding,
 978                                                       &ndr_table_epmapper,
 979                                                       anon_creds, c->event_ctx);
 980         if (composite_nomem(pipe_connect_req, c)) return c;
 981
 982         composite_continue(c, pipe_connect_req, continue_epm_recv_binding, c);
 983         return c;
 984 }
 985
 986
 987 /*
 988   Receive result of endpoint mapping request
 989  */
 990 NTSTATUS dcerpc_epm_map_binding_recv(struct composite_context *c)
 991 {
 992         NTSTATUS status = composite_wait(c);
 993
 994         talloc_free(c);
 995         return status;
 996 }
 997
 998
 999 /*
1000   Get endpoint mapping for rpc connection
1001 */
1002 NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding,
1003                                 const struct ndr_interface_table *table, struct event_context *ev)
1004 {
1005         struct composite_context *c;
1006
1007         c = dcerpc_epm_map_binding_send(mem_ctx, binding, table, ev);
1008         return dcerpc_epm_map_binding_recv(c);
1009 }
1010
1011
1012 struct pipe_auth_state {
1013         struct dcerpc_pipe *pipe;
1014         struct dcerpc_binding *binding;
1015         const struct ndr_interface_table *table;
1016         struct cli_credentials *credentials;
1017 };
1018
1019
1020 static void continue_auth_schannel(struct composite_context *ctx);
1021 static void continue_auth(struct composite_context *ctx);
1022 static void continue_auth_none(struct composite_context *ctx);
1023 static void continue_ntlmssp_connection(struct composite_context *ctx);
1024 static void continue_spnego_after_wrong_pass(struct composite_context *ctx);
1025
1026
1027 /*
1028   Stage 2 of pipe_auth: Receive result of schannel bind request
1029 */
1030 static void continue_auth_schannel(struct composite_context *ctx)
1031 {
1032         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1033                                                       struct composite_context);
1034
1035         c->status = dcerpc_bind_auth_schannel_recv(ctx);
1036         if (!composite_is_ok(c)) return;
1037
1038         composite_done(c);
1039 }
1040
1041
1042 /*
1043   Stage 2 of pipe_auth: Receive result of authenticated bind request
1044 */
1045 static void continue_auth(struct composite_context *ctx)
1046 {
1047         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1048                                                       struct composite_context);
1049
1050         c->status = dcerpc_bind_auth_recv(ctx);
1051         if (!composite_is_ok(c)) return;
1052
1053         composite_done(c);
1054 }
1055 /*
1056   Stage 2 of pipe_auth: Receive result of authenticated bind request, but handle fallbacks:
1057   SPNEGO -> NTLMSSP
1058 */
1059 static void continue_auth_auto(struct composite_context *ctx)
1060 {
1061         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1062                                                       struct composite_context);
1063         struct pipe_auth_state *s = talloc_get_type(c->private_data, struct pipe_auth_state);
1064         struct composite_context *sec_conn_req;
1065
1066         c->status = dcerpc_bind_auth_recv(ctx);
1067         if (NT_STATUS_EQUAL(c->status, NT_STATUS_INVALID_PARAMETER)) {
1068                 /*
1069                  * Retry with NTLMSSP auth as fallback
1070                  * send a request for secondary rpc connection
1071                  */
1072                 sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1073                                                                 s->binding);
1074                 composite_continue(c, sec_conn_req, continue_ntlmssp_connection, c);
1075                 return;
1076         } else if (NT_STATUS_EQUAL(c->status, NT_STATUS_LOGON_FAILURE)) {
1077                 if (cli_credentials_wrong_password(s->credentials)) {
1078                         /*
1079                          * Retry SPNEGO with a better password
1080                          * send a request for secondary rpc connection
1081                          */
1082                         sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1083                                                                         s->binding);
1084                         composite_continue(c, sec_conn_req, continue_spnego_after_wrong_pass, c);
1085                         return;
1086                 }
1087         }
1088
1089         if (!composite_is_ok(c)) return;
1090
1091         composite_done(c);
1092 }
1093
1094 /*
1095   Stage 3 of pipe_auth (fallback to NTLMSSP case): Receive secondary
1096   rpc connection (the first one can't be used any more, due to the
1097   bind nak) and perform authenticated bind request
1098 */
1099 static void continue_ntlmssp_connection(struct composite_context *ctx)
1100 {
1101         struct composite_context *c;
1102         struct pipe_auth_state *s;
1103         struct composite_context *auth_req;
1104         struct dcerpc_pipe *p2;
1105
1106         c = talloc_get_type(ctx->async.private_data, struct composite_context);
1107         s = talloc_get_type(c->private_data, struct pipe_auth_state);
1108
1109         /* receive secondary rpc connection */
1110         c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1111         if (!composite_is_ok(c)) return;
1112
1113         talloc_steal(s, p2);
1114         talloc_steal(p2, s->pipe);
1115         s->pipe = p2;
1116
1117         /* initiate a authenticated bind */
1118         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1119                                          s->credentials, DCERPC_AUTH_TYPE_NTLMSSP,
1120                                          dcerpc_auth_level(s->pipe->conn),
1121                                          s->table->authservices->names[0]);
1122         composite_continue(c, auth_req, continue_auth, c);
1123 }
1124
1125 /*
1126   Stage 3 of pipe_auth (retry on wrong password): Receive secondary
1127   rpc connection (the first one can't be used any more, due to the
1128   bind nak) and perform authenticated bind request
1129 */
1130 static void continue_spnego_after_wrong_pass(struct composite_context *ctx)
1131 {
1132         struct composite_context *c;
1133         struct pipe_auth_state *s;
1134         struct composite_context *auth_req;
1135         struct dcerpc_pipe *p2;
1136
1137         c = talloc_get_type(ctx->async.private_data, struct composite_context);
1138         s = talloc_get_type(c->private_data, struct pipe_auth_state);
1139
1140         /* receive secondary rpc connection */
1141         c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1142         if (!composite_is_ok(c)) return;
1143
1144         talloc_steal(s, p2);
1145         talloc_steal(p2, s->pipe);
1146         s->pipe = p2;
1147
1148         /* initiate a authenticated bind */
1149         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1150                                          s->credentials, DCERPC_AUTH_TYPE_SPNEGO,
1151                                          dcerpc_auth_level(s->pipe->conn),
1152                                          s->table->authservices->names[0]);
1153         composite_continue(c, auth_req, continue_auth, c);
1154 }
1155
1156
1157 /*
1158   Stage 2 of pipe_auth: Receive result of non-authenticated bind request
1159 */
1160 static void continue_auth_none(struct composite_context *ctx)
1161 {
1162         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1163                                                       struct composite_context);
1164
1165         c->status = dcerpc_bind_auth_none_recv(ctx);
1166         if (!composite_is_ok(c)) return;
1167
1168         composite_done(c);
1169 }
1170
1171
1172 /*
1173   Request to perform an authenticated bind if required. Authentication
1174   is determined using credentials passed and binding flags.
1175 */
1176 struct composite_context *dcerpc_pipe_auth_send(struct dcerpc_pipe *p,
1177                                                 struct dcerpc_binding *binding,
1178                                                 const struct ndr_interface_table *table,
1179                                                 struct cli_credentials *credentials)
1180 {
1181         struct composite_context *c;
1182         struct pipe_auth_state *s;
1183         struct composite_context *auth_schannel_req;
1184         struct composite_context *auth_req;
1185         struct composite_context *auth_none_req;
1186         struct dcerpc_connection *conn;
1187         uint8_t auth_type;
1188
1189         /* composite context allocation and setup */
1190         c = composite_create(p, p->conn->event_ctx);
1191         if (c == NULL) return NULL;
1192
1193         s = talloc_zero(c, struct pipe_auth_state);
1194         if (composite_nomem(s, c)) return c;
1195         c->private_data = s;
1196
1197         /* store parameters in state structure */
1198         s->binding      = binding;
1199         s->table        = table;
1200         s->credentials  = credentials;
1201         s->pipe         = p;
1202
1203         conn = s->pipe->conn;
1204         conn->flags = binding->flags;
1205
1206         /* remember the binding string for possible secondary connections */
1207         conn->binding_string = dcerpc_binding_string(p, binding);
1208
1209         if (cli_credentials_is_anonymous(s->credentials)) {
1210                 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1211                 composite_continue(c, auth_none_req, continue_auth_none, c);
1212                 return c;
1213         }
1214
1215         if ((binding->flags & DCERPC_SCHANNEL) &&
1216             !cli_credentials_get_netlogon_creds(s->credentials)) {
1217                 /* If we don't already have netlogon credentials for
1218                  * the schannel bind, then we have to get these
1219                  * first */
1220                 auth_schannel_req = dcerpc_bind_auth_schannel_send(c, s->pipe, s->table,
1221                                                                    s->credentials,
1222                                                                    dcerpc_auth_level(conn));
1223                 composite_continue(c, auth_schannel_req, continue_auth_schannel, c);
1224                 return c;
1225         }
1226
1227         /*
1228          * we rely on the already authenticated CIFS connection
1229          * if not doing sign or seal
1230          */
1231         if (conn->transport.transport == NCACN_NP &&
1232             !(s->binding->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1233                 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1234                 composite_continue(c, auth_none_req, continue_auth_none, c);
1235                 return c;
1236         }
1237
1238
1239         /* Perform an authenticated DCE-RPC bind
1240          */
1241         if (!(conn->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1242                 /*
1243                   we are doing an authenticated connection,
1244                   but not using sign or seal. We must force
1245                   the CONNECT dcerpc auth type as a NONE auth
1246                   type doesn't allow authentication
1247                   information to be passed.
1248                 */
1249                 conn->flags |= DCERPC_CONNECT;
1250         }
1251
1252         if (s->binding->flags & DCERPC_AUTH_SPNEGO) {
1253                 auth_type = DCERPC_AUTH_TYPE_SPNEGO;
1254
1255         } else if (s->binding->flags & DCERPC_AUTH_KRB5) {
1256                 auth_type = DCERPC_AUTH_TYPE_KRB5;
1257
1258         } else if (s->binding->flags & DCERPC_SCHANNEL) {
1259                 auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
1260
1261         } else if (s->binding->flags & DCERPC_AUTH_NTLM) {
1262                 auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
1263
1264         } else {
1265                 /* try SPNEGO with fallback to NTLMSSP */
1266                 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1267                                                  s->credentials, DCERPC_AUTH_TYPE_SPNEGO,
1268                                                  dcerpc_auth_level(conn),
1269                                                  s->table->authservices->names[0]);
1270                 composite_continue(c, auth_req, continue_auth_auto, c);
1271                 return c;
1272         }
1273
1274         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1275                                          s->credentials, auth_type,
1276                                          dcerpc_auth_level(conn),
1277                                          s->table->authservices->names[0]);
1278         composite_continue(c, auth_req, continue_auth, c);
1279         return c;
1280 }
1281
1282
1283 /*
1284   Receive result of authenticated bind request on dcerpc pipe
1285
1286   This returns *p, which may be different to the one originally
1287   supllied, as it rebinds to a new pipe due to authentication fallback
1288
1289 */
1290 NTSTATUS dcerpc_pipe_auth_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1291                                struct dcerpc_pipe **p)
1292 {
1293         NTSTATUS status;
1294
1295         struct pipe_auth_state *s = talloc_get_type(c->private_data,
1296                                                     struct pipe_auth_state);
1297         status = composite_wait(c);
1298         if (!NT_STATUS_IS_OK(status)) {
1299                 char *uuid_str = GUID_string(s->pipe, &s->table->syntax_id.uuid);
1300                 DEBUG(0, ("Failed to bind to uuid %s - %s\n", uuid_str, nt_errstr(status)));
1301                 talloc_free(uuid_str);
1302         } else {
1303                 talloc_steal(mem_ctx, s->pipe);
1304                 *p = s->pipe;
1305         }
1306
1307         talloc_free(c);
1308         return status;
1309 }
1310
1311
1312 /*
1313    Perform an authenticated bind if needed - sync version
1314
1315    This may change *p, as it rebinds to a new pipe due to authentication fallback
1316 */
1317 NTSTATUS dcerpc_pipe_auth(TALLOC_CTX *mem_ctx,
1318                           struct dcerpc_pipe **p,
1319                           struct dcerpc_binding *binding,
1320                           const struct ndr_interface_table *table,
1321                           struct cli_credentials *credentials)
1322 {
1323         struct composite_context *c;
1324
1325         c = dcerpc_pipe_auth_send(*p, binding, table, credentials);
1326         return dcerpc_pipe_auth_recv(c, mem_ctx, p);
1327 }
1328
1329
1330 NTSTATUS dcerpc_generic_session_key(struct dcerpc_connection *c,
1331                                     DATA_BLOB *session_key)
1332 {
1333         /* this took quite a few CPU cycles to find ... */
1334         session_key->data = discard_const_p(unsigned char, "SystemLibraryDTC");
1335         session_key->length = 16;
1336         return NT_STATUS_OK;
1337 }
1338
1339 /*
1340   fetch the user session key - may be default (above) or the SMB session key
1341 */
1342 NTSTATUS dcerpc_fetch_session_key(struct dcerpc_pipe *p,
1343                                   DATA_BLOB *session_key)
1344 {
1345         return p->conn->security_state.session_key(p->conn, session_key);
1346 }
1347
1348
1349 /*
1350   log a rpc packet in a format suitable for ndrdump. This is especially useful
1351   for sealed packets, where ethereal cannot easily see the contents
1352
1353   this triggers on a debug level of >= 10
1354 */
1355 void dcerpc_log_packet(const struct ndr_interface_table *ndr,
1356                        uint32_t opnum, uint32_t flags, DATA_BLOB *pkt)
1357 {
1358         const int num_examples = 20;
1359         int i;
1360
1361         if (DEBUGLEVEL < 10) return;
1362
1363         for (i=0;i<num_examples;i++) {
1364                 char *name=NULL;
1365                 asprintf(&name, "%s/rpclog/%s-%u.%d.%s",
1366                          lp_lockdir(), ndr->name, opnum, i,
1367                          (flags&NDR_IN)?"in":"out");
1368                 if (name == NULL) {
1369                         return;
1370                 }
1371                 if (!file_exist(name)) {
1372                         if (file_save(name, pkt->data, pkt->length)) {
1373                                 DEBUG(10,("Logged rpc packet to %s\n", name));
1374                         }
1375                         free(name);
1376                         break;
1377                 }
1378                 free(name);
1379         }
1380 }
1381
1382
1383
1384 /*
1385   create a secondary context from a primary connection
1386
1387   this uses dcerpc_alter_context() to create a new dcerpc context_id
1388 */
1389 NTSTATUS dcerpc_secondary_context(struct dcerpc_pipe *p,
1390                                   struct dcerpc_pipe **pp2,
1391                                   const struct ndr_interface_table *table)
1392 {
1393         NTSTATUS status;
1394         struct dcerpc_pipe *p2;
1395
1396         p2 = talloc_zero(p, struct dcerpc_pipe);
1397         if (p2 == NULL) {
1398                 return NT_STATUS_NO_MEMORY;
1399         }
1400         p2->conn = talloc_reference(p2, p->conn);
1401         p2->request_timeout = p->request_timeout;
1402
1403         p2->context_id = ++p->conn->next_context_id;
1404
1405         p2->syntax = table->syntax_id;
1406
1407         p2->transfer_syntax = ndr_transfer_syntax;
1408
1409         p2->binding = talloc_reference(p2, p->binding);
1410
1411         status = dcerpc_alter_context(p2, p2, &p2->syntax, &p2->transfer_syntax);
1412         if (!NT_STATUS_IS_OK(status)) {
1413                 talloc_free(p2);
1414                 return status;
1415         }
1416
1417         *pp2 = p2;
1418
1419         return status;
1420 }