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         struct ndr_push *ndr;
  57         enum ndr_err_code ndr_err;
  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         ndr_err = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
  79         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  80                 return ndr_map_error2ntstatus(ndr_err);
  81         }
  82
  83         if (auth_info) {
  84                 ndr_err = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info);
  85                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  86                         return ndr_map_error2ntstatus(ndr_err);
  87                 }
  88         }
  89
  90         *blob = ndr_push_blob(ndr);
  91
  92         /* fill in the frag length */
  93         dcerpc_set_frag_length(blob, blob->length);
  94
  95         return NT_STATUS_OK;
  96 }
  97
  98 #define MAX_PROTSEQ             10
  99
 100 static const struct {
 101         const char *name;
 102         enum dcerpc_transport_t transport;
 103         int num_protocols;
 104         enum epm_protocol protseq[MAX_PROTSEQ];
 105 } transports[] = {
 106         { "ncacn_np",     NCACN_NP, 3,
 107                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
 108         { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
 109                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
 110         { "ncacn_http", NCACN_HTTP, 3,
 111                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
 112         { "ncadg_ip_udp", NCACN_IP_UDP, 3,
 113                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
 114         { "ncalrpc", NCALRPC, 2,
 115                 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE } },
 116         { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
 117                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
 118         { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
 119                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
 120         { "ncacn_at_dsp", NCACN_AT_DSP, 3,
 121                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
 122         { "ncadg_at_ddp", NCADG_AT_DDP, 3,
 123                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
 124         { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
 125                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
 126         { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
 127                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
 128         { "ncadg_ipx", NCADG_IPX, 2,
 129                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
 130         },
 131         { "ncacn_spx", NCACN_SPX, 3,
 132                 /* I guess some MS programmer confused the identifier for
 133                  * EPM_PROTOCOL_UUID (0x0D or 13) with the one for
 134                  * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/
 135                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID },
 136         },
 137 };
 138
 139 static const struct {
 140         const char *name;
 141         uint32_t flag;
 142 } ncacn_options[] = {
 143         {"sign", DCERPC_SIGN},
 144         {"seal", DCERPC_SEAL},
 145         {"connect", DCERPC_CONNECT},
 146         {"spnego", DCERPC_AUTH_SPNEGO},
 147         {"ntlm", DCERPC_AUTH_NTLM},
 148         {"krb5", DCERPC_AUTH_KRB5},
 149         {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
 150         {"print", DCERPC_DEBUG_PRINT_BOTH},
 151         {"padcheck", DCERPC_DEBUG_PAD_CHECK},
 152         {"bigendian", DCERPC_PUSH_BIGENDIAN},
 153         {"smb2", DCERPC_SMB2}
 154 };
 155
 156 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 157 {
 158         struct ndr_syntax_id syntax;
 159         NTSTATUS status;
 160
 161         switch(epm_floor->lhs.protocol) {
 162                 case EPM_PROTOCOL_UUID:
 163                         status = dcerpc_floor_get_lhs_data(epm_floor, &syntax);
 164                         if (NT_STATUS_IS_OK(status)) {
 165                                 /* lhs is used: UUID */
 166                                 char *uuidstr;
 167
 168                                 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax.uuid)) {
 169                                         return "NDR";
 170                                 }
 171
 172                                 if (GUID_equal(&syntax.uuid, &ndr64_transfer_syntax.uuid)) {
 173                                         return "NDR64";
 174                                 }
 175
 176                                 uuidstr = GUID_string(mem_ctx, &syntax.uuid);
 177
 178                                 return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.if_version);
 179                         } else { /* IPX */
 180                                 return talloc_asprintf(mem_ctx, "IPX:%s",
 181                                                 data_blob_hex_string(mem_ctx, &epm_floor->rhs.uuid.unknown));
 182                         }
 183
 184                 case EPM_PROTOCOL_NCACN:
 185                         return "RPC-C";
 186
 187                 case EPM_PROTOCOL_NCADG:
 188                         return "RPC";
 189
 190                 case EPM_PROTOCOL_NCALRPC:
 191                         return "NCALRPC";
 192
 193                 case EPM_PROTOCOL_DNET_NSP:
 194                         return "DNET/NSP";
 195
 196                 case EPM_PROTOCOL_IP:
 197                         return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr);
 198
 199                 case EPM_PROTOCOL_PIPE:
 200                         return talloc_asprintf(mem_ctx, "PIPE:%s", epm_floor->rhs.pipe.path);
 201
 202                 case EPM_PROTOCOL_SMB:
 203                         return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc);
 204
 205                 case EPM_PROTOCOL_UNIX_DS:
 206                         return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path);
 207
 208                 case EPM_PROTOCOL_NETBIOS:
 209                         return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name);
 210
 211                 case EPM_PROTOCOL_NETBEUI:
 212                         return "NETBeui";
 213
 214                 case EPM_PROTOCOL_SPX:
 215                         return "SPX";
 216
 217                 case EPM_PROTOCOL_NB_IPX:
 218                         return "NB_IPX";
 219
 220                 case EPM_PROTOCOL_HTTP:
 221                         return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port);
 222
 223                 case EPM_PROTOCOL_TCP:
 224                         return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port);
 225
 226                 case EPM_PROTOCOL_UDP:
 227                         return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port);
 228
 229                 default:
 230                         return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol);
 231         }
 232 }
 233
 234
 235 /*
 236   form a binding string from a binding structure
 237 */
 238 char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
 239 {
 240         char *s = talloc_strdup(mem_ctx, "");
 241         int i;
 242         const char *t_name = NULL;
 243
 244         if (b->transport != NCA_UNKNOWN) {
 245                 for (i=0;i<ARRAY_SIZE(transports);i++) {
 246                         if (transports[i].transport == b->transport) {
 247                                 t_name = transports[i].name;
 248                         }
 249                 }
 250                 if (!t_name) {
 251                         return NULL;
 252                 }
 253         }
 254
 255         if (!GUID_all_zero(&b->object.uuid)) {
 256                 s = talloc_asprintf(s, "%s@",
 257                                     GUID_string(mem_ctx, &b->object.uuid));
 258         }
 259
 260         if (t_name != NULL) {
 261                 s = talloc_asprintf_append_buffer(s, "%s:", t_name);
 262                 if (s == NULL) {
 263                         return NULL;
 264                 }
 265         }
 266
 267         if (b->host) {
 268                 s = talloc_asprintf_append_buffer(s, "%s", b->host);
 269         }
 270
 271         if (!b->endpoint && !b->options && !b->flags) {
 272                 return s;
 273         }
 274
 275         s = talloc_asprintf_append_buffer(s, "[");
 276
 277         if (b->endpoint) {
 278                 s = talloc_asprintf_append_buffer(s, "%s", b->endpoint);
 279         }
 280
 281         /* this is a *really* inefficent way of dealing with strings,
 282            but this is rarely called and the strings are always short,
 283            so I don't care */
 284         for (i=0;b->options && b->options[i];i++) {
 285                 s = talloc_asprintf_append_buffer(s, ",%s", b->options[i]);
 286                 if (!s) return NULL;
 287         }
 288
 289         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 290                 if (b->flags & ncacn_options[i].flag) {
 291                         s = talloc_asprintf_append_buffer(s, ",%s", ncacn_options[i].name);
 292                         if (!s) return NULL;
 293                 }
 294         }
 295
 296         s = talloc_asprintf_append_buffer(s, "]");
 297
 298         return s;
 299 }
 300
 301 /*
 302   parse a binding string into a dcerpc_binding structure
 303 */
 304 NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
 305 {
 306         struct dcerpc_binding *b;
 307         char *options;
 308         char *p;
 309         int i, j, comma_count;
 310
 311         b = talloc(mem_ctx, struct dcerpc_binding);
 312         if (!b) {
 313                 return NT_STATUS_NO_MEMORY;
 314         }
 315
 316         p = strchr(s, '@');
 317
 318         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 319                 NTSTATUS status;
 320
 321                 status = GUID_from_string(s, &b->object.uuid);
 322
 323                 if (NT_STATUS_IS_ERR(status)) {
 324                         DEBUG(0, ("Failed parsing UUID\n"));
 325                         return status;
 326                 }
 327
 328                 s = p + 1;
 329         } else {
 330                 ZERO_STRUCT(b->object);
 331         }
 332
 333         b->object.if_version = 0;
 334
 335         p = strchr(s, ':');
 336
 337         if (p == NULL) {
 338                 b->transport = NCA_UNKNOWN;
 339         } else {
 340                 char *type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 341                 if (!type) {
 342                         return NT_STATUS_NO_MEMORY;
 343                 }
 344
 345                 for (i=0;i<ARRAY_SIZE(transports);i++) {
 346                         if (strcasecmp(type, transports[i].name) == 0) {
 347                                 b->transport = transports[i].transport;
 348                                 break;
 349                         }
 350                 }
 351
 352                 if (i==ARRAY_SIZE(transports)) {
 353                         DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 354                         return NT_STATUS_INVALID_PARAMETER;
 355                 }
 356
 357                 talloc_free(type);
 358
 359                 s = p+1;
 360         }
 361
 362         p = strchr(s, '[');
 363         if (p) {
 364                 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
 365                 options = talloc_strdup(mem_ctx, p+1);
 366                 if (options[strlen(options)-1] != ']') {
 367                         return NT_STATUS_INVALID_PARAMETER;
 368                 }
 369                 options[strlen(options)-1] = 0;
 370         } else {
 371                 b->host = talloc_strdup(b, s);
 372                 options = NULL;
 373         }
 374         if (!b->host) {
 375                 return NT_STATUS_NO_MEMORY;
 376         }
 377
 378         b->target_hostname = b->host;
 379
 380         b->options = NULL;
 381         b->flags = 0;
 382         b->assoc_group_id = 0;
 383         b->endpoint = NULL;
 384
 385         if (!options) {
 386                 *b_out = b;
 387                 return NT_STATUS_OK;
 388         }
 389
 390         comma_count = count_chars(options, ',');
 391
 392         b->options = talloc_array(b, const char *, comma_count+2);
 393         if (!b->options) {
 394                 return NT_STATUS_NO_MEMORY;
 395         }
 396
 397         for (i=0; (p = strchr(options, ',')); i++) {
 398                 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
 399                 if (!b->options[i]) {
 400                         return NT_STATUS_NO_MEMORY;
 401                 }
 402                 options = p+1;
 403         }
 404         b->options[i] = options;
 405         b->options[i+1] = NULL;
 406
 407         /* some options are pre-parsed for convenience */
 408         for (i=0;b->options[i];i++) {
 409                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 410                         if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
 411                                 int k;
 412                                 b->flags |= ncacn_options[j].flag;
 413                                 for (k=i;b->options[k];k++) {
 414                                         b->options[k] = b->options[k+1];
 415                                 }
 416                                 i--;
 417                                 break;
 418                         }
 419                 }
 420         }
 421
 422         if (b->options[0]) {
 423                 /* Endpoint is first option */
 424                 b->endpoint = b->options[0];
 425                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 426
 427                 for (i=0;b->options[i];i++) {
 428                         b->options[i] = b->options[i+1];
 429                 }
 430         }
 431
 432         if (b->options[0] == NULL)
 433                 b->options = NULL;
 434
 435         *b_out = b;
 436         return NT_STATUS_OK;
 437 }
 438
 439 NTSTATUS dcerpc_floor_get_lhs_data(struct epm_floor *epm_floor, struct ndr_syntax_id *syntax)
 440 {
 441         TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
 442         struct ndr_pull *ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx);
 443         enum ndr_err_code ndr_err;
 444         uint16_t if_version=0;
 445
 446         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 447
 448         ndr_err = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 449         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 450                 talloc_free(mem_ctx);
 451                 return ndr_map_error2ntstatus(ndr_err);
 452         }
 453
 454         ndr_err = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
 455         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 456                 talloc_free(mem_ctx);
 457                 return ndr_map_error2ntstatus(ndr_err);
 458         }
 459
 460         syntax->if_version = if_version;
 461
 462         talloc_free(mem_ctx);
 463
 464         return NT_STATUS_OK;
 465 }
 466
 467 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
 468 {
 469         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 470
 471         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 472
 473         ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 474         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
 475
 476         return ndr_push_blob(ndr);
 477 }
 478
 479 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 480 {
 481         switch (epm_floor->lhs.protocol) {
 482         case EPM_PROTOCOL_TCP:
 483                 if (epm_floor->rhs.tcp.port == 0) return NULL;
 484                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
 485
 486         case EPM_PROTOCOL_UDP:
 487                 if (epm_floor->rhs.udp.port == 0) return NULL;
 488                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
 489
 490         case EPM_PROTOCOL_HTTP:
 491                 if (epm_floor->rhs.http.port == 0) return NULL;
 492                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
 493
 494         case EPM_PROTOCOL_IP:
 495                 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
 496
 497         case EPM_PROTOCOL_NCACN:
 498                 return NULL;
 499
 500         case EPM_PROTOCOL_NCADG:
 501                 return NULL;
 502
 503         case EPM_PROTOCOL_SMB:
 504                 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
 505                 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
 506
 507         case EPM_PROTOCOL_PIPE:
 508                 if (strlen(epm_floor->rhs.pipe.path) == 0) return NULL;
 509                 return talloc_strdup(mem_ctx, epm_floor->rhs.pipe.path);
 510
 511         case EPM_PROTOCOL_NETBIOS:
 512                 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
 513                 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
 514
 515         case EPM_PROTOCOL_NCALRPC:
 516                 return NULL;
 517
 518         case EPM_PROTOCOL_VINES_SPP:
 519                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
 520
 521         case EPM_PROTOCOL_VINES_IPC:
 522                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
 523
 524         case EPM_PROTOCOL_STREETTALK:
 525                 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
 526
 527         case EPM_PROTOCOL_UNIX_DS:
 528                 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
 529                 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
 530
 531         case EPM_PROTOCOL_NULL:
 532                 return NULL;
 533
 534         default:
 535                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 536                 break;
 537         }
 538
 539         return NULL;
 540 }
 541
 542 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx,
 543                                           struct epm_floor *epm_floor,
 544                                           const char *data)
 545 {
 546         switch (epm_floor->lhs.protocol) {
 547         case EPM_PROTOCOL_TCP:
 548                 epm_floor->rhs.tcp.port = atoi(data);
 549                 return NT_STATUS_OK;
 550
 551         case EPM_PROTOCOL_UDP:
 552                 epm_floor->rhs.udp.port = atoi(data);
 553                 return NT_STATUS_OK;
 554
 555         case EPM_PROTOCOL_HTTP:
 556                 epm_floor->rhs.http.port = atoi(data);
 557                 return NT_STATUS_OK;
 558
 559         case EPM_PROTOCOL_IP:
 560                 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
 561                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
 562                 return NT_STATUS_OK;
 563
 564         case EPM_PROTOCOL_NCACN:
 565                 epm_floor->rhs.ncacn.minor_version = 0;
 566                 return NT_STATUS_OK;
 567
 568         case EPM_PROTOCOL_NCADG:
 569                 epm_floor->rhs.ncadg.minor_version = 0;
 570                 return NT_STATUS_OK;
 571
 572         case EPM_PROTOCOL_SMB:
 573                 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 574                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
 575                 return NT_STATUS_OK;
 576
 577         case EPM_PROTOCOL_PIPE:
 578                 epm_floor->rhs.pipe.path = talloc_strdup(mem_ctx, data);
 579                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.pipe.path);
 580                 return NT_STATUS_OK;
 581
 582         case EPM_PROTOCOL_NETBIOS:
 583                 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 584                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
 585                 return NT_STATUS_OK;
 586
 587         case EPM_PROTOCOL_NCALRPC:
 588                 return NT_STATUS_OK;
 589
 590         case EPM_PROTOCOL_VINES_SPP:
 591                 epm_floor->rhs.vines_spp.port = atoi(data);
 592                 return NT_STATUS_OK;
 593
 594         case EPM_PROTOCOL_VINES_IPC:
 595                 epm_floor->rhs.vines_ipc.port = atoi(data);
 596                 return NT_STATUS_OK;
 597
 598         case EPM_PROTOCOL_STREETTALK:
 599                 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 600                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
 601                 return NT_STATUS_OK;
 602
 603         case EPM_PROTOCOL_UNIX_DS:
 604                 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 605                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
 606                 return NT_STATUS_OK;
 607
 608         case EPM_PROTOCOL_NULL:
 609                 return NT_STATUS_OK;
 610
 611         default:
 612                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 613                 break;
 614         }
 615
 616         return NT_STATUS_NOT_SUPPORTED;
 617 }
 618
 619 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 620 {
 621         int i;
 622
 623         /* Find a transport that has 'prot' as 4th protocol */
 624         for (i=0;i<ARRAY_SIZE(transports);i++) {
 625                 if (transports[i].num_protocols >= 2 &&
 626                         transports[i].protseq[1] == prot) {
 627                         return transports[i].transport;
 628                 }
 629         }
 630
 631         /* Unknown transport */
 632         return (unsigned int)-1;
 633 }
 634
 635 enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower)
 636 {
 637         int i;
 638
 639         /* Find a transport that matches this tower */
 640         for (i=0;i<ARRAY_SIZE(transports);i++) {
 641                 int j;
 642                 if (transports[i].num_protocols != tower->num_floors - 2) {
 643                         continue;
 644                 }
 645
 646                 for (j = 0; j < transports[i].num_protocols; j++) {
 647                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 648                                 break;
 649                         }
 650                 }
 651
 652                 if (j == transports[i].num_protocols) {
 653                         return transports[i].transport;
 654                 }
 655         }
 656
 657         /* Unknown transport */
 658         return (unsigned int)-1;
 659 }
 660
 661 NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx,
 662                                    struct epm_tower *tower,
 663                                    struct dcerpc_binding **b_out)
 664 {
 665         NTSTATUS status;
 666         struct dcerpc_binding *binding;
 667
 668         binding = talloc(mem_ctx, struct dcerpc_binding);
 669         NT_STATUS_HAVE_NO_MEMORY(binding);
 670
 671         ZERO_STRUCT(binding->object);
 672         binding->options = NULL;
 673         binding->host = NULL;
 674         binding->target_hostname = NULL;
 675         binding->flags = 0;
 676         binding->assoc_group_id = 0;
 677
 678         binding->transport = dcerpc_transport_by_tower(tower);
 679
 680         if (binding->transport == (unsigned int)-1) {
 681                 return NT_STATUS_NOT_SUPPORTED;
 682         }
 683
 684         if (tower->num_floors < 1) {
 685                 return NT_STATUS_OK;
 686         }
 687
 688         /* Set object uuid */
 689         status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
 690
 691         if (!NT_STATUS_IS_OK(status)) {
 692                 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
 693                 return status;
 694         }
 695
 696         /* Ignore floor 1, it contains the NDR version info */
 697
 698         binding->options = NULL;
 699
 700         /* Set endpoint */
 701         if (tower->num_floors >= 4) {
 702                 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
 703         } else {
 704                 binding->endpoint = NULL;
 705         }
 706
 707         /* Set network address */
 708         if (tower->num_floors >= 5) {
 709                 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
 710                 NT_STATUS_HAVE_NO_MEMORY(binding->host);
 711                 binding->target_hostname = binding->host;
 712         }
 713         *b_out = binding;
 714         return NT_STATUS_OK;
 715 }
 716
 717 NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower)
 718 {
 719         const enum epm_protocol *protseq = NULL;
 720         int num_protocols = -1, i;
 721         NTSTATUS status;
 722
 723         /* Find transport */
 724         for (i=0;i<ARRAY_SIZE(transports);i++) {
 725                 if (transports[i].transport == binding->transport) {
 726                         protseq = transports[i].protseq;
 727                         num_protocols = transports[i].num_protocols;
 728                         break;
 729                 }
 730         }
 731
 732         if (num_protocols == -1) {
 733                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 734                 return NT_STATUS_UNSUCCESSFUL;
 735         }
 736
 737         tower->num_floors = 2 + num_protocols;
 738         tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
 739
 740         /* Floor 0 */
 741         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 742
 743         tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &binding->object);
 744
 745         tower->floors[0].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 746
 747         /* Floor 1 */
 748         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 749
 750         tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx,
 751                                                                 &ndr_transfer_syntax);
 752
 753         tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
 754
 755         /* Floor 2 to num_protocols */
 756         for (i = 0; i < num_protocols; i++) {
 757                 tower->floors[2 + i].lhs.protocol = protseq[i];
 758                 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(mem_ctx, NULL, 0);
 759                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 760                 dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], "");
 761         }
 762
 763         /* The 4th floor contains the endpoint */
 764         if (num_protocols >= 2 && binding->endpoint) {
 765                 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint);
 766                 if (NT_STATUS_IS_ERR(status)) {
 767                         return status;
 768                 }
 769         }
 770
 771         /* The 5th contains the network address */
 772         if (num_protocols >= 3 && binding->host) {
 773                 if (is_ipaddress(binding->host)) {
 774                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 775                                                            binding->host);
 776                 } else {
 777                         /* note that we don't attempt to resolve the
 778                            name here - when we get a hostname here we
 779                            are in the client code, and want to put in
 780                            a wildcard all-zeros IP for the server to
 781                            fill in */
 782                         status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
 783                                                            "0.0.0.0");
 784                 }
 785                 if (NT_STATUS_IS_ERR(status)) {
 786                         return status;
 787                 }
 788         }
 789
 790         return NT_STATUS_OK;
 791 }
 792
 793
 794 struct epm_map_binding_state {
 795         struct dcerpc_binding *binding;
 796         const struct ndr_interface_table *table;
 797         struct dcerpc_pipe *pipe;
 798         struct policy_handle handle;
 799         struct GUID guid;
 800         struct epm_twr_t twr;
 801         struct epm_twr_t *twr_r;
 802         struct epm_Map r;
 803 };
 804
 805
 806 static void continue_epm_recv_binding(struct composite_context *ctx);
 807 static void continue_epm_map(struct rpc_request *req);
 808
 809
 810 /*
 811   Stage 2 of epm_map_binding: Receive connected rpc pipe and send endpoint
 812   mapping rpc request
 813 */
 814 static void continue_epm_recv_binding(struct composite_context *ctx)
 815 {
 816         struct rpc_request *map_req;
 817
 818         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 819                                                       struct composite_context);
 820         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 821                                                           struct epm_map_binding_state);
 822
 823         /* receive result of rpc pipe connect request */
 824         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 825         if (!composite_is_ok(c)) return;
 826
 827         s->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
 828
 829         /* prepare requested binding parameters */
 830         s->binding->object         = s->table->syntax_id;
 831
 832         c->status = dcerpc_binding_build_tower(s->pipe, s->binding, &s->twr.tower);
 833         if (!composite_is_ok(c)) return;
 834
 835         /* with some nice pretty paper around it of course */
 836         s->r.in.object        = &s->guid;
 837         s->r.in.map_tower     = &s->twr;
 838         s->r.in.entry_handle  = &s->handle;
 839         s->r.in.max_towers    = 1;
 840         s->r.out.entry_handle = &s->handle;
 841
 842         /* send request for an endpoint mapping - a rpc request on connected pipe */
 843         map_req = dcerpc_epm_Map_send(s->pipe, c, &s->r);
 844         if (composite_nomem(map_req, c)) return;
 845
 846         composite_continue_rpc(c, map_req, continue_epm_map, c);
 847 }
 848
 849
 850 /*
 851   Stage 3 of epm_map_binding: Receive endpoint mapping and provide binding details
 852 */
 853 static void continue_epm_map(struct rpc_request *req)
 854 {
 855         struct composite_context *c = talloc_get_type(req->async.private_data,
 856                                                       struct composite_context);
 857         struct epm_map_binding_state *s = talloc_get_type(c->private_data,
 858                                                           struct epm_map_binding_state);
 859
 860         /* receive result of a rpc request */
 861         c->status = dcerpc_ndr_request_recv(req);
 862         if (!composite_is_ok(c)) return;
 863
 864         /* check the details */
 865         if (s->r.out.result != 0 || *s->r.out.num_towers != 1) {
 866                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 867                 return;
 868         }
 869
 870         s->twr_r = s->r.out.towers[0].twr;
 871         if (s->twr_r == NULL) {
 872                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 873                 return;
 874         }
 875
 876         if (s->twr_r->tower.num_floors != s->twr.tower.num_floors ||
 877             s->twr_r->tower.floors[3].lhs.protocol != s->twr.tower.floors[3].lhs.protocol) {
 878                 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
 879                 return;
 880         }
 881
 882         /* get received endpoint */
 883         s->binding->endpoint = talloc_reference(s->binding,
 884                                                 dcerpc_floor_get_rhs_data(c, &s->twr_r->tower.floors[3]));
 885         if (composite_nomem(s->binding->endpoint, c)) return;
 886
 887         composite_done(c);
 888 }
 889
 890
 891 /*
 892   Request for endpoint mapping of dcerpc binding - try to request for endpoint
 893   unless there is default one.
 894 */
 895 struct composite_context *dcerpc_epm_map_binding_send(TALLOC_CTX *mem_ctx,
 896                                                       struct dcerpc_binding *binding,
 897                                                       const struct ndr_interface_table *table,
 898                                                       struct event_context *ev)
 899 {
 900         struct composite_context *c;
 901         struct epm_map_binding_state *s;
 902         struct composite_context *pipe_connect_req;
 903         struct cli_credentials *anon_creds;
 904         struct event_context *new_ev = NULL;
 905
 906         NTSTATUS status;
 907         struct dcerpc_binding *epmapper_binding;
 908         int i;
 909
 910         /* Try to find event context in memory context in case passed
 911          * event_context (argument) was NULL. If there's none, just
 912          * create a new one.
 913          */
 914         if (ev == NULL) {
 915                 ev = event_context_find(mem_ctx);
 916                 if (ev == NULL) {
 917                         new_ev = event_context_init(mem_ctx);
 918                         if (new_ev == NULL) return NULL;
 919                         ev = new_ev;
 920                 }
 921         }
 922
 923         /* composite context allocation and setup */
 924         c = composite_create(mem_ctx, ev);
 925         if (c == NULL) {
 926                 talloc_free(new_ev);
 927                 return NULL;
 928         }
 929         talloc_steal(c, new_ev);
 930
 931         s = talloc_zero(c, struct epm_map_binding_state);
 932         if (composite_nomem(s, c)) return c;
 933         c->private_data = s;
 934
 935         s->binding = binding;
 936         s->table   = table;
 937
 938         /* anonymous credentials for rpc connection used to get endpoint mapping */
 939         anon_creds = cli_credentials_init(mem_ctx);
 940         cli_credentials_set_event_context(anon_creds, ev);
 941         cli_credentials_set_conf(anon_creds, global_loadparm);
 942         cli_credentials_set_anonymous(anon_creds);
 943
 944         /*
 945           First, check if there is a default endpoint specified in the IDL
 946         */
 947         if (table != NULL) {
 948                 struct dcerpc_binding *default_binding;
 949
 950                 /* Find one of the default pipes for this interface */
 951                 for (i = 0; i < table->endpoints->count; i++) {
 952                         status = dcerpc_parse_binding(mem_ctx, table->endpoints->names[i], &default_binding);
 953
 954                         if (NT_STATUS_IS_OK(status)) {
 955                                 if (binding->transport == NCA_UNKNOWN)
 956                                         binding->transport = default_binding->transport;
 957                                 if (default_binding->transport == binding->transport &&
 958                                         default_binding->endpoint) {
 959                                         binding->endpoint = talloc_reference(binding, default_binding->endpoint);
 960                                         talloc_free(default_binding);
 961
 962                                         composite_done(c);
 963                                         return c;
 964
 965                                 } else {
 966                                         talloc_free(default_binding);
 967                                 }
 968                         }
 969                 }
 970         }
 971
 972         epmapper_binding = talloc_zero(c, struct dcerpc_binding);
 973         if (composite_nomem(epmapper_binding, c)) return c;
 974
 975         /* basic endpoint mapping data */
 976         epmapper_binding->transport             = binding->transport;
 977         epmapper_binding->host                  = talloc_reference(epmapper_binding, binding->host);
 978         epmapper_binding->target_hostname       = epmapper_binding->host;
 979         epmapper_binding->options               = NULL;
 980         epmapper_binding->flags                 = 0;
 981         epmapper_binding->assoc_group_id        = 0;
 982         epmapper_binding->endpoint              = NULL;
 983
 984         /* initiate rpc pipe connection */
 985         pipe_connect_req = dcerpc_pipe_connect_b_send(c, epmapper_binding,
 986                                                       &ndr_table_epmapper,
 987                                                       anon_creds, c->event_ctx);
 988         if (composite_nomem(pipe_connect_req, c)) return c;
 989
 990         composite_continue(c, pipe_connect_req, continue_epm_recv_binding, c);
 991         return c;
 992 }
 993
 994
 995 /*
 996   Receive result of endpoint mapping request
 997  */
 998 NTSTATUS dcerpc_epm_map_binding_recv(struct composite_context *c)
 999 {
1000         NTSTATUS status = composite_wait(c);
1001
1002         talloc_free(c);
1003         return status;
1004 }
1005
1006
1007 /*
1008   Get endpoint mapping for rpc connection
1009 */
1010 NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding,
1011                                 const struct ndr_interface_table *table, struct event_context *ev)
1012 {
1013         struct composite_context *c;
1014
1015         c = dcerpc_epm_map_binding_send(mem_ctx, binding, table, ev);
1016         return dcerpc_epm_map_binding_recv(c);
1017 }
1018
1019
1020 struct pipe_auth_state {
1021         struct dcerpc_pipe *pipe;
1022         struct dcerpc_binding *binding;
1023         const struct ndr_interface_table *table;
1024         struct cli_credentials *credentials;
1025 };
1026
1027
1028 static void continue_auth_schannel(struct composite_context *ctx);
1029 static void continue_auth(struct composite_context *ctx);
1030 static void continue_auth_none(struct composite_context *ctx);
1031 static void continue_ntlmssp_connection(struct composite_context *ctx);
1032 static void continue_spnego_after_wrong_pass(struct composite_context *ctx);
1033
1034
1035 /*
1036   Stage 2 of pipe_auth: Receive result of schannel bind request
1037 */
1038 static void continue_auth_schannel(struct composite_context *ctx)
1039 {
1040         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1041                                                       struct composite_context);
1042
1043         c->status = dcerpc_bind_auth_schannel_recv(ctx);
1044         if (!composite_is_ok(c)) return;
1045
1046         composite_done(c);
1047 }
1048
1049
1050 /*
1051   Stage 2 of pipe_auth: Receive result of authenticated bind request
1052 */
1053 static void continue_auth(struct composite_context *ctx)
1054 {
1055         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1056                                                       struct composite_context);
1057
1058         c->status = dcerpc_bind_auth_recv(ctx);
1059         if (!composite_is_ok(c)) return;
1060
1061         composite_done(c);
1062 }
1063 /*
1064   Stage 2 of pipe_auth: Receive result of authenticated bind request, but handle fallbacks:
1065   SPNEGO -> NTLMSSP
1066 */
1067 static void continue_auth_auto(struct composite_context *ctx)
1068 {
1069         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1070                                                       struct composite_context);
1071         struct pipe_auth_state *s = talloc_get_type(c->private_data, struct pipe_auth_state);
1072         struct composite_context *sec_conn_req;
1073
1074         c->status = dcerpc_bind_auth_recv(ctx);
1075         if (NT_STATUS_EQUAL(c->status, NT_STATUS_INVALID_PARAMETER)) {
1076                 /*
1077                  * Retry with NTLMSSP auth as fallback
1078                  * send a request for secondary rpc connection
1079                  */
1080                 sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1081                                                                 s->binding);
1082                 composite_continue(c, sec_conn_req, continue_ntlmssp_connection, c);
1083                 return;
1084         } else if (NT_STATUS_EQUAL(c->status, NT_STATUS_LOGON_FAILURE)) {
1085                 if (cli_credentials_wrong_password(s->credentials)) {
1086                         /*
1087                          * Retry SPNEGO with a better password
1088                          * send a request for secondary rpc connection
1089                          */
1090                         sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1091                                                                         s->binding);
1092                         composite_continue(c, sec_conn_req, continue_spnego_after_wrong_pass, c);
1093                         return;
1094                 }
1095         }
1096
1097         if (!composite_is_ok(c)) return;
1098
1099         composite_done(c);
1100 }
1101
1102 /*
1103   Stage 3 of pipe_auth (fallback to NTLMSSP case): Receive secondary
1104   rpc connection (the first one can't be used any more, due to the
1105   bind nak) and perform authenticated bind request
1106 */
1107 static void continue_ntlmssp_connection(struct composite_context *ctx)
1108 {
1109         struct composite_context *c;
1110         struct pipe_auth_state *s;
1111         struct composite_context *auth_req;
1112         struct dcerpc_pipe *p2;
1113
1114         c = talloc_get_type(ctx->async.private_data, struct composite_context);
1115         s = talloc_get_type(c->private_data, struct pipe_auth_state);
1116
1117         /* receive secondary rpc connection */
1118         c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1119         if (!composite_is_ok(c)) return;
1120
1121         talloc_steal(s, p2);
1122         talloc_steal(p2, s->pipe);
1123         s->pipe = p2;
1124
1125         /* initiate a authenticated bind */
1126         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1127                                          s->credentials, DCERPC_AUTH_TYPE_NTLMSSP,
1128                                          dcerpc_auth_level(s->pipe->conn),
1129                                          s->table->authservices->names[0]);
1130         composite_continue(c, auth_req, continue_auth, c);
1131 }
1132
1133 /*
1134   Stage 3 of pipe_auth (retry on wrong password): Receive secondary
1135   rpc connection (the first one can't be used any more, due to the
1136   bind nak) and perform authenticated bind request
1137 */
1138 static void continue_spnego_after_wrong_pass(struct composite_context *ctx)
1139 {
1140         struct composite_context *c;
1141         struct pipe_auth_state *s;
1142         struct composite_context *auth_req;
1143         struct dcerpc_pipe *p2;
1144
1145         c = talloc_get_type(ctx->async.private_data, struct composite_context);
1146         s = talloc_get_type(c->private_data, struct pipe_auth_state);
1147
1148         /* receive secondary rpc connection */
1149         c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1150         if (!composite_is_ok(c)) return;
1151
1152         talloc_steal(s, p2);
1153         talloc_steal(p2, s->pipe);
1154         s->pipe = p2;
1155
1156         /* initiate a authenticated bind */
1157         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1158                                          s->credentials, DCERPC_AUTH_TYPE_SPNEGO,
1159                                          dcerpc_auth_level(s->pipe->conn),
1160                                          s->table->authservices->names[0]);
1161         composite_continue(c, auth_req, continue_auth, c);
1162 }
1163
1164
1165 /*
1166   Stage 2 of pipe_auth: Receive result of non-authenticated bind request
1167 */
1168 static void continue_auth_none(struct composite_context *ctx)
1169 {
1170         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1171                                                       struct composite_context);
1172
1173         c->status = dcerpc_bind_auth_none_recv(ctx);
1174         if (!composite_is_ok(c)) return;
1175
1176         composite_done(c);
1177 }
1178
1179
1180 /*
1181   Request to perform an authenticated bind if required. Authentication
1182   is determined using credentials passed and binding flags.
1183 */
1184 struct composite_context *dcerpc_pipe_auth_send(struct dcerpc_pipe *p,
1185                                                 struct dcerpc_binding *binding,
1186                                                 const struct ndr_interface_table *table,
1187                                                 struct cli_credentials *credentials)
1188 {
1189         struct composite_context *c;
1190         struct pipe_auth_state *s;
1191         struct composite_context *auth_schannel_req;
1192         struct composite_context *auth_req;
1193         struct composite_context *auth_none_req;
1194         struct dcerpc_connection *conn;
1195         uint8_t auth_type;
1196
1197         /* composite context allocation and setup */
1198         c = composite_create(p, p->conn->event_ctx);
1199         if (c == NULL) return NULL;
1200
1201         s = talloc_zero(c, struct pipe_auth_state);
1202         if (composite_nomem(s, c)) return c;
1203         c->private_data = s;
1204
1205         /* store parameters in state structure */
1206         s->binding      = binding;
1207         s->table        = table;
1208         s->credentials  = credentials;
1209         s->pipe         = p;
1210
1211         conn = s->pipe->conn;
1212         conn->flags = binding->flags;
1213
1214         /* remember the binding string for possible secondary connections */
1215         conn->binding_string = dcerpc_binding_string(p, binding);
1216
1217         if (cli_credentials_is_anonymous(s->credentials)) {
1218                 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1219                 composite_continue(c, auth_none_req, continue_auth_none, c);
1220                 return c;
1221         }
1222
1223         if ((binding->flags & DCERPC_SCHANNEL) &&
1224             !cli_credentials_get_netlogon_creds(s->credentials)) {
1225                 /* If we don't already have netlogon credentials for
1226                  * the schannel bind, then we have to get these
1227                  * first */
1228                 auth_schannel_req = dcerpc_bind_auth_schannel_send(c, s->pipe, s->table,
1229                                                                    s->credentials,
1230                                                                    dcerpc_auth_level(conn));
1231                 composite_continue(c, auth_schannel_req, continue_auth_schannel, c);
1232                 return c;
1233         }
1234
1235         /*
1236          * we rely on the already authenticated CIFS connection
1237          * if not doing sign or seal
1238          */
1239         if (conn->transport.transport == NCACN_NP &&
1240             !(s->binding->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1241                 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1242                 composite_continue(c, auth_none_req, continue_auth_none, c);
1243                 return c;
1244         }
1245
1246
1247         /* Perform an authenticated DCE-RPC bind
1248          */
1249         if (!(conn->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1250                 /*
1251                   we are doing an authenticated connection,
1252                   but not using sign or seal. We must force
1253                   the CONNECT dcerpc auth type as a NONE auth
1254                   type doesn't allow authentication
1255                   information to be passed.
1256                 */
1257                 conn->flags |= DCERPC_CONNECT;
1258         }
1259
1260         if (s->binding->flags & DCERPC_AUTH_SPNEGO) {
1261                 auth_type = DCERPC_AUTH_TYPE_SPNEGO;
1262
1263         } else if (s->binding->flags & DCERPC_AUTH_KRB5) {
1264                 auth_type = DCERPC_AUTH_TYPE_KRB5;
1265
1266         } else if (s->binding->flags & DCERPC_SCHANNEL) {
1267                 auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
1268
1269         } else if (s->binding->flags & DCERPC_AUTH_NTLM) {
1270                 auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
1271
1272         } else {
1273                 /* try SPNEGO with fallback to NTLMSSP */
1274                 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1275                                                  s->credentials, DCERPC_AUTH_TYPE_SPNEGO,
1276                                                  dcerpc_auth_level(conn),
1277                                                  s->table->authservices->names[0]);
1278                 composite_continue(c, auth_req, continue_auth_auto, c);
1279                 return c;
1280         }
1281
1282         auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1283                                          s->credentials, auth_type,
1284                                          dcerpc_auth_level(conn),
1285                                          s->table->authservices->names[0]);
1286         composite_continue(c, auth_req, continue_auth, c);
1287         return c;
1288 }
1289
1290
1291 /*
1292   Receive result of authenticated bind request on dcerpc pipe
1293
1294   This returns *p, which may be different to the one originally
1295   supllied, as it rebinds to a new pipe due to authentication fallback
1296
1297 */
1298 NTSTATUS dcerpc_pipe_auth_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1299                                struct dcerpc_pipe **p)
1300 {
1301         NTSTATUS status;
1302
1303         struct pipe_auth_state *s = talloc_get_type(c->private_data,
1304                                                     struct pipe_auth_state);
1305         status = composite_wait(c);
1306         if (!NT_STATUS_IS_OK(status)) {
1307                 char *uuid_str = GUID_string(s->pipe, &s->table->syntax_id.uuid);
1308                 DEBUG(0, ("Failed to bind to uuid %s - %s\n", uuid_str, nt_errstr(status)));
1309                 talloc_free(uuid_str);
1310         } else {
1311                 talloc_steal(mem_ctx, s->pipe);
1312                 *p = s->pipe;
1313         }
1314
1315         talloc_free(c);
1316         return status;
1317 }
1318
1319
1320 /*
1321    Perform an authenticated bind if needed - sync version
1322
1323    This may change *p, as it rebinds to a new pipe due to authentication fallback
1324 */
1325 NTSTATUS dcerpc_pipe_auth(TALLOC_CTX *mem_ctx,
1326                           struct dcerpc_pipe **p,
1327                           struct dcerpc_binding *binding,
1328                           const struct ndr_interface_table *table,
1329                           struct cli_credentials *credentials)
1330 {
1331         struct composite_context *c;
1332
1333         c = dcerpc_pipe_auth_send(*p, binding, table, credentials);
1334         return dcerpc_pipe_auth_recv(c, mem_ctx, p);
1335 }
1336
1337
1338 NTSTATUS dcerpc_generic_session_key(struct dcerpc_connection *c,
1339                                     DATA_BLOB *session_key)
1340 {
1341         /* this took quite a few CPU cycles to find ... */
1342         session_key->data = discard_const_p(unsigned char, "SystemLibraryDTC");
1343         session_key->length = 16;
1344         return NT_STATUS_OK;
1345 }
1346
1347 /*
1348   fetch the user session key - may be default (above) or the SMB session key
1349 */
1350 NTSTATUS dcerpc_fetch_session_key(struct dcerpc_pipe *p,
1351                                   DATA_BLOB *session_key)
1352 {
1353         return p->conn->security_state.session_key(p->conn, session_key);
1354 }
1355
1356
1357 /*
1358   log a rpc packet in a format suitable for ndrdump. This is especially useful
1359   for sealed packets, where ethereal cannot easily see the contents
1360
1361   this triggers on a debug level of >= 10
1362 */
1363 void dcerpc_log_packet(const struct ndr_interface_table *ndr,
1364                        uint32_t opnum, uint32_t flags, DATA_BLOB *pkt)
1365 {
1366         const int num_examples = 20;
1367         int i;
1368
1369         if (DEBUGLEVEL < 10) return;
1370
1371         for (i=0;i<num_examples;i++) {
1372                 char *name=NULL;
1373                 asprintf(&name, "%s/rpclog/%s-%u.%d.%s",
1374                          lp_lockdir(global_loadparm), ndr->name, opnum, i,
1375                          (flags&NDR_IN)?"in":"out");
1376                 if (name == NULL) {
1377                         return;
1378                 }
1379                 if (!file_exist(name)) {
1380                         if (file_save(name, pkt->data, pkt->length)) {
1381                                 DEBUG(10,("Logged rpc packet to %s\n", name));
1382                         }
1383                         free(name);
1384                         break;
1385                 }
1386                 free(name);
1387         }
1388 }
1389
1390
1391
1392 /*
1393   create a secondary context from a primary connection
1394
1395   this uses dcerpc_alter_context() to create a new dcerpc context_id
1396 */
1397 NTSTATUS dcerpc_secondary_context(struct dcerpc_pipe *p,
1398                                   struct dcerpc_pipe **pp2,
1399                                   const struct ndr_interface_table *table)
1400 {
1401         NTSTATUS status;
1402         struct dcerpc_pipe *p2;
1403
1404         p2 = talloc_zero(p, struct dcerpc_pipe);
1405         if (p2 == NULL) {
1406                 return NT_STATUS_NO_MEMORY;
1407         }
1408         p2->conn = talloc_reference(p2, p->conn);
1409         p2->request_timeout = p->request_timeout;
1410
1411         p2->context_id = ++p->conn->next_context_id;
1412
1413         p2->syntax = table->syntax_id;
1414
1415         p2->transfer_syntax = ndr_transfer_syntax;
1416
1417         p2->binding = talloc_reference(p2, p->binding);
1418
1419         status = dcerpc_alter_context(p2, p2, &p2->syntax, &p2->transfer_syntax);
1420         if (!NT_STATUS_IS_OK(status)) {
1421                 talloc_free(p2);
1422                 return status;
1423         }
1424
1425         *pp2 = p2;
1426
1427         return NT_STATUS_OK;
1428 }