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 2 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, write to the Free Software
  23    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 */
  25
  26 #include "includes.h"
  27 #include "lib/events/events.h"
  28 #include "libcli/composite/composite.h"
  29 #include "librpc/gen_ndr/ndr_epmapper_c.h"
  30 #include "librpc/gen_ndr/ndr_dcerpc.h"
  31 #include "librpc/gen_ndr/ndr_misc.h"
  32 #include "auth/credentials/credentials.h"
  33
  34 /*
  35   find a dcerpc call on an interface by name
  36 */
  37 const struct dcerpc_interface_call *dcerpc_iface_find_call(const struct dcerpc_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 dcerpc_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         for (i=0;i<ARRAY_SIZE(transports);i++) {
 242                 if (transports[i].transport == b->transport) {
 243                         t_name = transports[i].name;
 244                 }
 245         }
 246         if (!t_name) {
 247                 return NULL;
 248         }
 249
 250         if (!GUID_all_zero(&b->object.uuid)) {
 251                 s = talloc_asprintf(s, "%s@",
 252                                     GUID_string(mem_ctx, &b->object.uuid));
 253         }
 254
 255         s = talloc_asprintf_append(s, "%s:", t_name);
 256         if (!s) return NULL;
 257
 258         if (b->host) {
 259                 s = talloc_asprintf_append(s, "%s", b->host);
 260         }
 261
 262         if (!b->endpoint && !b->options && !b->flags) {
 263                 return s;
 264         }
 265
 266         s = talloc_asprintf_append(s, "[");
 267
 268         if (b->endpoint) {
 269                 s = talloc_asprintf_append(s, "%s", b->endpoint);
 270         }
 271
 272         /* this is a *really* inefficent way of dealing with strings,
 273            but this is rarely called and the strings are always short,
 274            so I don't care */
 275         for (i=0;b->options && b->options[i];i++) {
 276                 s = talloc_asprintf_append(s, ",%s", b->options[i]);
 277                 if (!s) return NULL;
 278         }
 279
 280         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 281                 if (b->flags & ncacn_options[i].flag) {
 282                         s = talloc_asprintf_append(s, ",%s", ncacn_options[i].name);
 283                         if (!s) return NULL;
 284                 }
 285         }
 286
 287         s = talloc_asprintf_append(s, "]");
 288
 289         return s;
 290 }
 291
 292 /*
 293   parse a binding string into a dcerpc_binding structure
 294 */
 295 NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
 296 {
 297         struct dcerpc_binding *b;
 298         char *options, *type;
 299         char *p;
 300         int i, j, comma_count;
 301
 302         b = talloc(mem_ctx, struct dcerpc_binding);
 303         if (!b) {
 304                 return NT_STATUS_NO_MEMORY;
 305         }
 306
 307         p = strchr(s, '@');
 308
 309         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 310                 NTSTATUS status;
 311
 312                 status = GUID_from_string(s, &b->object.uuid);
 313
 314                 if (NT_STATUS_IS_ERR(status)) {
 315                         DEBUG(0, ("Failed parsing UUID\n"));
 316                         return status;
 317                 }
 318
 319                 s = p + 1;
 320         } else {
 321                 ZERO_STRUCT(b->object);
 322         }
 323
 324         b->object.if_version = 0;
 325
 326         p = strchr(s, ':');
 327         if (!p) {
 328                 return NT_STATUS_INVALID_PARAMETER;
 329         }
 330
 331         type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 332         if (!type) {
 333                 return NT_STATUS_NO_MEMORY;
 334         }
 335
 336         for (i=0;i<ARRAY_SIZE(transports);i++) {
 337                 if (strcasecmp(type, transports[i].name) == 0) {
 338                         b->transport = transports[i].transport;
 339                         break;
 340                 }
 341         }
 342         if (i==ARRAY_SIZE(transports)) {
 343                 DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 344                 return NT_STATUS_INVALID_PARAMETER;
 345         }
 346
 347         s = p+1;
 348
 349         p = strchr(s, '[');
 350         if (p) {
 351                 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
 352                 options = talloc_strdup(mem_ctx, p+1);
 353                 if (options[strlen(options)-1] != ']') {
 354                         return NT_STATUS_INVALID_PARAMETER;
 355                 }
 356                 options[strlen(options)-1] = 0;
 357         } else {
 358                 b->host = talloc_strdup(b, s);
 359                 options = NULL;
 360         }
 361         if (!b->host) {
 362                 return NT_STATUS_NO_MEMORY;
 363         }
 364
 365         b->target_hostname = b->host;
 366
 367         b->options = NULL;
 368         b->flags = 0;
 369         b->assoc_group_id = 0;
 370         b->endpoint = NULL;
 371
 372         if (!options) {
 373                 *b_out = b;
 374                 return NT_STATUS_OK;
 375         }
 376
 377         comma_count = count_chars(options, ',');
 378
 379         b->options = talloc_array(b, const char *, comma_count+2);
 380         if (!b->options) {
 381                 return NT_STATUS_NO_MEMORY;
 382         }
 383
 384         for (i=0; (p = strchr(options, ',')); i++) {
 385                 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
 386                 if (!b->options[i]) {
 387                         return NT_STATUS_NO_MEMORY;
 388                 }
 389                 options = p+1;
 390         }
 391         b->options[i] = options;
 392         b->options[i+1] = NULL;
 393
 394         /* some options are pre-parsed for convenience */
 395         for (i=0;b->options[i];i++) {
 396                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 397                         if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
 398                                 int k;
 399                                 b->flags |= ncacn_options[j].flag;
 400                                 for (k=i;b->options[k];k++) {
 401                                         b->options[k] = b->options[k+1];
 402                                 }
 403                                 i--;
 404                                 break;
 405                         }
 406                 }
 407         }
 408
 409         if (b->options[0]) {
 410                 /* Endpoint is first option */
 411                 b->endpoint = b->options[0];
 412                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 413
 414                 for (i=0;b->options[i];i++) {
 415                         b->options[i] = b->options[i+1];
 416                 }
 417         }
 418
 419         if (b->options[0] == NULL)
 420                 b->options = NULL;
 421
 422         *b_out = b;
 423         return NT_STATUS_OK;
 424 }
 425
 426 NTSTATUS dcerpc_floor_get_lhs_data(struct epm_floor *epm_floor, struct dcerpc_syntax_id *syntax)
 427 {
 428         TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
 429         struct ndr_pull *ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx);
 430         NTSTATUS status;
 431         uint16_t if_version=0;
 432
 433         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 434
 435         status = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 436         if (NT_STATUS_IS_ERR(status)) {
 437                 talloc_free(mem_ctx);
 438                 return status;
 439         }
 440
 441         status = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
 442         syntax->if_version = if_version;
 443
 444         talloc_free(mem_ctx);
 445
 446         return status;
 447 }
 448
 449 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct dcerpc_syntax_id *syntax)
 450 {
 451         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 452
 453         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 454
 455         ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 456         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
 457
 458         return ndr_push_blob(ndr);
 459 }
 460
 461 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 462 {
 463         switch (epm_floor->lhs.protocol) {
 464         case EPM_PROTOCOL_TCP:
 465                 if (epm_floor->rhs.tcp.port == 0) return NULL;
 466                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
 467
 468         case EPM_PROTOCOL_UDP:
 469                 if (epm_floor->rhs.udp.port == 0) return NULL;
 470                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
 471
 472         case EPM_PROTOCOL_HTTP:
 473                 if (epm_floor->rhs.http.port == 0) return NULL;
 474                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
 475
 476         case EPM_PROTOCOL_IP:
 477                 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
 478
 479         case EPM_PROTOCOL_NCACN:
 480                 return NULL;
 481
 482         case EPM_PROTOCOL_NCADG:
 483                 return NULL;
 484
 485         case EPM_PROTOCOL_SMB:
 486                 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
 487                 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
 488
 489         case EPM_PROTOCOL_PIPE:
 490                 if (strlen(epm_floor->rhs.pipe.path) == 0) return NULL;
 491                 return talloc_strdup(mem_ctx, epm_floor->rhs.pipe.path);
 492
 493         case EPM_PROTOCOL_NETBIOS:
 494                 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
 495                 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
 496
 497         case EPM_PROTOCOL_NCALRPC:
 498                 return NULL;
 499
 500         case EPM_PROTOCOL_VINES_SPP:
 501                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
 502
 503         case EPM_PROTOCOL_VINES_IPC:
 504                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
 505
 506         case EPM_PROTOCOL_STREETTALK:
 507                 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
 508
 509         case EPM_PROTOCOL_UNIX_DS:
 510                 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
 511                 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
 512
 513         case EPM_PROTOCOL_NULL:
 514                 return NULL;
 515
 516         default:
 517                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 518                 break;
 519         }
 520
 521         return NULL;
 522 }
 523
 524 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor,  const char *data)
 525 {
 526         switch (epm_floor->lhs.protocol) {
 527         case EPM_PROTOCOL_TCP:
 528                 epm_floor->rhs.tcp.port = atoi(data);
 529                 return NT_STATUS_OK;
 530
 531         case EPM_PROTOCOL_UDP:
 532                 epm_floor->rhs.udp.port = atoi(data);
 533                 return NT_STATUS_OK;
 534
 535         case EPM_PROTOCOL_HTTP:
 536                 epm_floor->rhs.http.port = atoi(data);
 537                 return NT_STATUS_OK;
 538
 539         case EPM_PROTOCOL_IP:
 540                 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
 541                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
 542                 return NT_STATUS_OK;
 543
 544         case EPM_PROTOCOL_NCACN:
 545                 epm_floor->rhs.ncacn.minor_version = 0;
 546                 return NT_STATUS_OK;
 547
 548         case EPM_PROTOCOL_NCADG:
 549                 epm_floor->rhs.ncadg.minor_version = 0;
 550                 return NT_STATUS_OK;
 551
 552         case EPM_PROTOCOL_SMB:
 553                 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 554                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
 555                 return NT_STATUS_OK;
 556
 557         case EPM_PROTOCOL_PIPE:
 558                 epm_floor->rhs.pipe.path = talloc_strdup(mem_ctx, data);
 559                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.pipe.path);
 560                 return NT_STATUS_OK;
 561
 562         case EPM_PROTOCOL_NETBIOS:
 563                 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 564                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
 565                 return NT_STATUS_OK;
 566
 567         case EPM_PROTOCOL_NCALRPC:
 568                 return NT_STATUS_OK;
 569
 570         case EPM_PROTOCOL_VINES_SPP:
 571                 epm_floor->rhs.vines_spp.port = atoi(data);
 572                 return NT_STATUS_OK;
 573
 574         case EPM_PROTOCOL_VINES_IPC:
 575                 epm_floor->rhs.vines_ipc.port = atoi(data);
 576                 return NT_STATUS_OK;
 577
 578         case EPM_PROTOCOL_STREETTALK:
 579                 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 580                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
 581                 return NT_STATUS_OK;
 582
 583         case EPM_PROTOCOL_UNIX_DS:
 584                 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 585                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
 586                 return NT_STATUS_OK;
 587
 588         case EPM_PROTOCOL_NULL:
 589                 return NT_STATUS_OK;
 590
 591         default:
 592                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 593                 break;
 594         }
 595
 596         return NT_STATUS_NOT_SUPPORTED;
 597 }
 598
 599 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 600 {
 601         int i;
 602
 603         /* Find a transport that has 'prot' as 4th protocol */
 604         for (i=0;i<ARRAY_SIZE(transports);i++) {
 605                 if (transports[i].num_protocols >= 2 &&
 606                         transports[i].protseq[1] == prot) {
 607                         return transports[i].transport;
 608                 }
 609         }
 610
 611         /* Unknown transport */
 612         return (unsigned int)-1;
 613 }
 614
 615 enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower)
 616 {
 617         int i;
 618
 619         /* Find a transport that matches this tower */
 620         for (i=0;i<ARRAY_SIZE(transports);i++) {
 621                 int j;
 622                 if (transports[i].num_protocols != tower->num_floors - 2) {
 623                         continue;
 624                 }
 625
 626                 for (j = 0; j < transports[i].num_protocols; j++) {
 627                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 628                                 break;
 629                         }
 630                 }
 631
 632                 if (j == transports[i].num_protocols) {
 633                         return transports[i].transport;
 634                 }
 635         }
 636
 637         /* Unknown transport */
 638         return (unsigned int)-1;
 639 }
 640
 641 NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx, struct epm_tower *tower, struct dcerpc_binding **b_out)
 642 {
 643         NTSTATUS status;
 644         struct dcerpc_binding *binding;
 645
 646         binding = talloc(mem_ctx, struct dcerpc_binding);
 647         NT_STATUS_HAVE_NO_MEMORY(binding);
 648
 649         ZERO_STRUCT(binding->object);
 650         binding->options = NULL;
 651         binding->host = NULL;
 652         binding->target_hostname = NULL;
 653         binding->flags = 0;
 654         binding->assoc_group_id = 0;
 655
 656         binding->transport = dcerpc_transport_by_tower(tower);
 657
 658         if (binding->transport == (unsigned int)-1) {
 659                 return NT_STATUS_NOT_SUPPORTED;
 660         }
 661
 662         if (tower->num_floors < 1) {
 663                 return NT_STATUS_OK;
 664         }
 665
 666         /* Set object uuid */
 667         status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
 668
 669         if (!NT_STATUS_IS_OK(status)) {
 670                 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
 671                 return status;
 672         }
 673
 674         /* Ignore floor 1, it contains the NDR version info */
 675
 676         binding->options = NULL;
 677
 678         /* Set endpoint */
 679         if (tower->num_floors >= 4) {
 680                 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
 681         } else {
 682                 binding->endpoint = NULL;
 683         }
 684
 685         /* Set network address */
 686         if (tower->num_floors >= 5) {
 687                 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
 688                 NT_STATUS_HAVE_NO_MEMORY(binding->host);
 689                 binding->target_hostname = binding->host;
 690         }
 691         *b_out = binding;
 692         return NT_STATUS_OK;
 693 }
 694
 695 NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower)
 696 {
 697         const enum epm_protocol *protseq = NULL;
 698         int num_protocols = -1, i;
 699         NTSTATUS status;
 700
 701         /* Find transport */
 702         for (i=0;i<ARRAY_SIZE(transports);i++) {
 703                 if (transports[i].transport == binding->transport) {
 704                         protseq = transports[i].protseq;
 705                         num_protocols = transports[i].num_protocols;
 706                         break;
 707                 }
 708         }
 709
 710         if (num_protocols == -1) {
 711                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 712                 return NT_STATUS_UNSUCCESSFUL;
 713         }
 714
 715         tower->num_floors = 2 + num_protocols;
 716         tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
 717
 718         /* Floor 0 */
 719         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 720
 721         tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &binding->object);
 722
 723         tower->floors[0].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 724
 725         /* Floor 1 */
 726         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 727
 728         tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx,
 729                                                                 &ndr_transfer_syntax);
 730
 731         tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 732
 733         /* Floor 2 to num_protocols */
 734         for (i = 0; i < num_protocols; i++) {
 735                 tower->floors[2 + i].lhs.protocol = protseq[i];
 736                 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(mem_ctx, NULL, 0);
 737                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 738                 dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], "");
 739         }
 740
 741         /* The 4th floor contains the endpoint */
 742         if (num_protocols >= 2 && binding->endpoint) {
 743                 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint);
 744                 if (NT_STATUS_IS_ERR(status)) {
 745                         return status;
 746                 }
 747         }
 748
 749         /* The 5th contains the network address */
 750         if (num_protocols >= 3 && binding->host) {
 751                 if (is_ipaddress(binding->host)) {
 752                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 753                                                            binding->host);
 754                 } else {
 755                         /* note that we don't attempt to resolve the
 756                            name here - when we get a hostname here we
 757                            are in the client code, and want to put in
 758                            a wildcard all-zeros IP for the server to
 759                            fill in */
 760                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 761                                                            "0.0.0.0");
 762                 }
 763                 if (NT_STATUS_IS_ERR(status)) {
 764                         return status;
 765                 }
 766         }
 767
 768         return NT_STATUS_OK;
 769 }
 770
 771
 772 struct epm_map_binding_state {
 773         struct dcerpc_binding *binding;
 774         const struct dcerpc_interface_table *table;
 775         struct dcerpc_pipe *pipe;
 776         struct policy_handle handle;
 777         struct GUID guid;
 778         struct epm_twr_t twr;
 779         struct epm_twr_t *twr_r;
 780         struct epm_Map r;
 781 };
 782
 783
 784 static void continue_epm_recv_binding(struct composite_context *ctx);
 785 static void continue_epm_map(struct rpc_request *req);
 786
 787
 788 /*
 789   Stage 2 of epm_map_binding: Receive connected rpc pipe and send endpoint
 790   mapping rpc request
 791 */
 792 static void continue_epm_recv_binding(struct composite_context *ctx)
 793 {
 794         struct rpc_request *map_req;
 795
 796         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 797                                                       struct composite_context);
 798         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 799                                                           struct epm_map_binding_state);
 800
 801         /* receive result of rpc pipe connect request */
 802         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 803         if (!composite_is_ok(c)) return;
 804
 805         s->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
 806
 807         /* prepare requested binding parameters */
 808         s->binding->object         = s->table->syntax_id;
 809
 810         c->status = dcerpc_binding_build_tower(s->pipe, s->binding, &s->twr.tower);
 811         if (!composite_is_ok(c)) return;
 812
 813         /* with some nice pretty paper around it of course */
 814         s->r.in.object        = &s->guid;
 815         s->r.in.map_tower     = &s->twr;
 816         s->r.in.entry_handle  = &s->handle;
 817         s->r.in.max_towers    = 1;
 818         s->r.out.entry_handle = &s->handle;
 819
 820         /* send request for an endpoint mapping - a rpc request on connected pipe */
 821         map_req = dcerpc_epm_Map_send(s->pipe, c, &s->r);
 822         if (composite_nomem(map_req, c)) return;
 823
 824         composite_continue_rpc(c, map_req, continue_epm_map, c);
 825 }
 826
 827
 828 /*
 829   Stage 3 of epm_map_binding: Receive endpoint mapping and provide binding details
 830 */
 831 static void continue_epm_map(struct rpc_request *req)
 832 {
 833         struct composite_context *c = talloc_get_type(req->async.private,
 834                                                       struct composite_context);
 835         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 836                                                           struct epm_map_binding_state);
 837
 838         /* receive result of a rpc request */
 839         c->status = dcerpc_ndr_request_recv(req);
 840         if (!composite_is_ok(c)) return;
 841
 842         /* check the details */
 843         if (s->r.out.result != 0 || *s->r.out.num_towers != 1) {
 844                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 845                 return;
 846         }
 847
 848         s->twr_r = s->r.out.towers[0].twr;
 849         if (s->twr_r == NULL) {
 850                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 851                 return;
 852         }
 853
 854         if (s->twr_r->tower.num_floors != s->twr.tower.num_floors ||
 855             s->twr_r->tower.floors[3].lhs.protocol != s->twr.tower.floors[3].lhs.protocol) {
 856                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 857                 return;
 858         }
 859
 860         /* get received endpoint */
 861         s->binding->endpoint = talloc_reference(s->binding,
 862                                                 dcerpc_floor_get_rhs_data(c, &s->twr_r->tower.floors[3]));
 863         if (composite_nomem(s->binding->endpoint, c)) return;
 864
 865         composite_done(c);
 866 }
 867
 868
 869 /*
 870   Request for endpoint mapping of dcerpc binding - try to request for endpoint
 871   unless there is default one.
 872 */
 873 struct composite_context *dcerpc_epm_map_binding_send(TALLOC_CTX *mem_ctx,
 874                                                       struct dcerpc_binding *binding,
 875                                                       const struct dcerpc_interface_table *table,
 876                                                       struct event_context *ev)
 877 {
 878         struct composite_context *c;
 879         struct epm_map_binding_state *s;
 880         struct composite_context *pipe_connect_req;
 881         struct cli_credentials *anon_creds;
 882         struct event_context *new_ev = NULL;
 883
 884         NTSTATUS status;
 885         struct dcerpc_binding *epmapper_binding;
 886         int i;
 887
 888         /* Try to find event context in memory context in case passed
 889          * event_context (argument) was NULL. If there's none, just
 890          * create a new one.
 891          */
 892         if (ev == NULL) {
 893                 ev = event_context_find(mem_ctx);
 894                 if (ev == NULL) {
 895                         new_ev = event_context_init(mem_ctx);
 896                         if (new_ev == NULL) return NULL;
 897                         ev = new_ev;
 898                 }
 899         }
 900
 901         /* composite context allocation and setup */
 902         c = composite_create(mem_ctx, ev);
 903         if (c == NULL) {
 904                 talloc_free(new_ev);
 905                 return NULL;
 906         }
 907         talloc_steal(c, new_ev);
 908
 909         s = talloc_zero(c, struct epm_map_binding_state);
 910         if (composite_nomem(s, c)) return c;
 911         c->private_data = s;
 912
 913         s->binding = binding;
 914         s->table   = table;
 915
 916         /* anonymous credentials for rpc connection used to get endpoint mapping */
 917         anon_creds = cli_credentials_init(mem_ctx);
 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 dcerpc_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 dcerpc_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 dcerpc_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 dcerpc_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 dcerpc_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 dcerpc_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 }