librpc/tools/ndrdump.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB torture tester
   4    Copyright (C) Andrew Tridgell 2003
   5    Copyright (C) Jelmer Vernooij 2006
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/filesys.h"
  23 #include "system/locale.h"
  24 #include "librpc/ndr/libndr.h"
  25 #include "librpc/ndr/ndr_table.h"
  26 #include "librpc/gen_ndr/ndr_dcerpc.h"
  27 #include "lib/cmdline/popt_common.h"
  28 #include "param/param.h"
  29
  30 static const struct ndr_interface_call *find_function(
  31         const struct ndr_interface_table *p,
  32         const char *function)
  33 {
  34         int i;
  35         if (isdigit(function[0])) {
  36                 i = strtol(function, NULL, 0);
  37                 return &p->calls[i];
  38         }
  39         for (i=0;i<p->num_calls;i++) {
  40                 if (strcmp(p->calls[i].name, function) == 0) {
  41                         break;
  42                 }
  43         }
  44         if (i == p->num_calls) {
  45                 printf("Function '%s' not found\n", function);
  46                 exit(1);
  47         }
  48         return &p->calls[i];
  49 }
  50
  51 _NORETURN_ static void show_pipes(void)
  52 {
  53         const struct ndr_interface_list *l;
  54         printf("\nYou must specify a pipe\n");
  55         printf("known pipes are:\n");
  56         for (l=ndr_table_list();l;l=l->next) {
  57                 if(l->table->helpstring) {
  58                         printf("\t%s - %s\n", l->table->name, l->table->helpstring);
  59                 } else {
  60                         printf("\t%s\n", l->table->name);
  61                 }
  62         }
  63         exit(1);
  64 }
  65
  66 _NORETURN_ static void show_functions(const struct ndr_interface_table *p)
  67 {
  68         int i;
  69         printf("\nYou must specify a function\n");
  70         printf("known functions on '%s' are:\n", p->name);
  71         for (i=0;i<p->num_calls;i++) {
  72                 printf("\t0x%02x (%2d) %s\n", i, i, p->calls[i].name);
  73         }
  74         exit(1);
  75 }
  76
  77 static char *stdin_load(TALLOC_CTX *mem_ctx, size_t *size)
  78 {
  79         int num_read, total_len = 0;
  80         char buf[255];
  81         char *result = NULL;
  82
  83         while((num_read = read(STDIN_FILENO, buf, 255)) > 0) {
  84
  85                 if (result) {
  86                         result = talloc_realloc(
  87                                 mem_ctx, result, char, total_len + num_read);
  88                 } else {
  89                         result = talloc_array(mem_ctx, char, num_read);
  90                 }
  91
  92                 memcpy(result + total_len, buf, num_read);
  93
  94                 total_len += num_read;
  95         }
  96
  97         if (size)
  98                 *size = total_len;
  99
 100         return result;
 101 }
 102
 103 static const struct ndr_interface_table *load_iface_from_plugin(const char *plugin, const char *pipe_name)
 104 {
 105         const struct ndr_interface_table *p;
 106         void *handle;
 107         char *symbol;
 108
 109         handle = dlopen(plugin, RTLD_NOW);
 110         if (handle == NULL) {
 111                 printf("%s: Unable to open: %s\n", plugin, dlerror());
 112                 return NULL;
 113         }
 114
 115         symbol = talloc_asprintf(NULL, "ndr_table_%s", pipe_name);
 116         p = (const struct ndr_interface_table *)dlsym(handle, symbol);
 117
 118         if (!p) {
 119                 printf("%s: Unable to find DCE/RPC interface table for '%s': %s\n", plugin, pipe_name, dlerror());
 120                 talloc_free(symbol);
 121                 dlclose(handle);
 122                 return NULL;
 123         }
 124
 125         talloc_free(symbol);
 126
 127         return p;
 128 }
 129
 130 static void ndrdump_data(uint8_t *d, uint32_t l, bool force)
 131 {
 132         dump_data_file(d, l, !force, stdout);
 133 }
 134
 135 static NTSTATUS ndrdump_pull_and_print_pipes(const char *function,
 136                                 struct ndr_pull *ndr_pull,
 137                                 struct ndr_print *ndr_print,
 138                                 const struct ndr_interface_call_pipes *pipes)
 139 {
 140         NTSTATUS status;
 141         enum ndr_err_code ndr_err;
 142         uint32_t i;
 143
 144         for (i=0; i < pipes->num_pipes; i++) {
 145                 uint64_t idx = 0;
 146                 while (true) {
 147                         void *saved_mem_ctx;
 148                         uint32_t *count;
 149                         void *c;
 150                         char *n;
 151
 152                         c = talloc_zero_size(ndr_pull, pipes->pipes[i].chunk_struct_size);
 153                         talloc_set_name(c, "struct %s", pipes->pipes[i].name);
 154                         /*
 155                          * Note: the first struct member is always
 156                          * 'uint32_t count;'
 157                          */
 158                         count = (uint32_t *)c;
 159
 160                         n = talloc_asprintf(c, "%s: %s[%llu]",
 161                                         function, pipes->pipes[i].name,
 162                                         (unsigned long long)idx);
 163
 164                         saved_mem_ctx = ndr_pull->current_mem_ctx;
 165                         ndr_pull->current_mem_ctx = c;
 166                         ndr_err = pipes->pipes[i].ndr_pull(ndr_pull, NDR_SCALARS, c);
 167                         ndr_pull->current_mem_ctx = saved_mem_ctx;
 168                         status = ndr_map_error2ntstatus(ndr_err);
 169
 170                         printf("pull returned %s\n", nt_errstr(status));
 171                         if (!NT_STATUS_IS_OK(status)) {
 172                                 talloc_free(c);
 173                                 return status;
 174                         }
 175                         pipes->pipes[i].ndr_print(ndr_print, n, c);
 176                         talloc_free(c);
 177                         if (*count == 0) {
 178                                 break;
 179                         }
 180                         idx++;
 181                 }
 182         }
 183
 184         return NT_STATUS_OK;
 185 }
 186
 187 static void ndr_print_dummy(struct ndr_print *ndr, const char *format, ...)
 188 {
 189         /* This is here so that you can turn ndr printing off for the purposes
 190            of benchmarking ndr parsing. */
 191 }
 192
 193  int main(int argc, const char *argv[])
 194 {
 195         const struct ndr_interface_table *p = NULL;
 196         const struct ndr_interface_call *f;
 197         const char *pipe_name, *function, *inout, *filename;
 198         uint8_t *data;
 199         size_t size;
 200         DATA_BLOB blob;
 201         struct ndr_pull *ndr_pull;
 202         struct ndr_print *ndr_print;
 203         TALLOC_CTX *mem_ctx;
 204         int flags;
 205         poptContext pc;
 206         NTSTATUS status;
 207         enum ndr_err_code ndr_err;
 208         void *st;
 209         void *v_st;
 210         const char *ctx_filename = NULL;
 211         const char *plugin = NULL;
 212         bool validate = false;
 213         bool dumpdata = false;
 214         bool assume_ndr64 = false;
 215         bool quiet = false;
 216         bool hex_input = false;
 217         int opt;
 218         enum {OPT_CONTEXT_FILE=1000, OPT_VALIDATE, OPT_DUMP_DATA, OPT_LOAD_DSO, OPT_NDR64, OPT_QUIET, OPT_HEX_INPUT};
 219         struct poptOption long_options[] = {
 220                 POPT_AUTOHELP
 221                 {"context-file", 'c', POPT_ARG_STRING, NULL, OPT_CONTEXT_FILE, "In-filename to parse first", "CTX-FILE" },
 222                 {"validate", 0, POPT_ARG_NONE, NULL, OPT_VALIDATE, "try to validate the data", NULL },
 223                 {"dump-data", 0, POPT_ARG_NONE, NULL, OPT_DUMP_DATA, "dump the hex data", NULL },
 224                 {"load-dso", 'l', POPT_ARG_STRING, NULL, OPT_LOAD_DSO, "load from shared object file", NULL },
 225                 {"ndr64", 0, POPT_ARG_NONE, NULL, OPT_NDR64, "Assume NDR64 data", NULL },
 226                 {"quiet", 0, POPT_ARG_NONE, NULL, OPT_QUIET, "Don't actually dump anything", NULL },
 227                 {"hex-input", 0, POPT_ARG_NONE, NULL, OPT_HEX_INPUT, "Read the input file in as a hex dump", NULL },
 228                 POPT_COMMON_SAMBA
 229                 POPT_COMMON_VERSION
 230                 { NULL }
 231         };
 232         const struct ndr_interface_call_pipes *in_pipes = NULL;
 233         const struct ndr_interface_call_pipes *out_pipes = NULL;
 234         uint32_t highest_ofs;
 235         struct dcerpc_sec_verification_trailer *sec_vt = NULL;
 236
 237         ndr_table_init();
 238
 239         /* Initialise samba stuff */
 240         smb_init_locale();
 241
 242         setlinebuf(stdout);
 243
 244         setup_logging("ndrdump", DEBUG_STDOUT);
 245
 246         pc = poptGetContext("ndrdump", argc, argv, long_options, 0);
 247
 248         poptSetOtherOptionHelp(
 249                 pc, "<pipe|uuid> <function> <inout> [<filename>]");
 250
 251         while ((opt = poptGetNextOpt(pc)) != -1) {
 252                 switch (opt) {
 253                 case OPT_CONTEXT_FILE:
 254                         ctx_filename = poptGetOptArg(pc);
 255                         break;
 256                 case OPT_VALIDATE:
 257                         validate = true;
 258                         break;
 259                 case OPT_DUMP_DATA:
 260                         dumpdata = true;
 261                         break;
 262                 case OPT_LOAD_DSO:
 263                         plugin = poptGetOptArg(pc);
 264                         break;
 265                 case OPT_NDR64:
 266                         assume_ndr64 = true;
 267                         break;
 268                 case OPT_QUIET:
 269                         quiet = true;
 270                         break;
 271                 case OPT_HEX_INPUT:
 272                         hex_input = true;
 273                         break;
 274                 }
 275         }
 276
 277         pipe_name = poptGetArg(pc);
 278
 279         if (!pipe_name) {
 280                 poptPrintUsage(pc, stderr, 0);
 281                 show_pipes();
 282                 exit(1);
 283         }
 284
 285         if (plugin != NULL) {
 286                 p = load_iface_from_plugin(plugin, pipe_name);
 287         }
 288         if (!p) {
 289                 p = ndr_table_by_name(pipe_name);
 290         }
 291
 292         if (!p) {
 293                 struct GUID uuid;
 294
 295                 status = GUID_from_string(pipe_name, &uuid);
 296
 297                 if (NT_STATUS_IS_OK(status)) {
 298                         p = ndr_table_by_uuid(&uuid);
 299                 }
 300         }
 301
 302         if (!p) {
 303                 printf("Unknown pipe or UUID '%s'\n", pipe_name);
 304                 exit(1);
 305         }
 306
 307         function = poptGetArg(pc);
 308         inout = poptGetArg(pc);
 309         filename = poptGetArg(pc);
 310
 311         if (!function || !inout) {
 312                 poptPrintUsage(pc, stderr, 0);
 313                 show_functions(p);
 314                 exit(1);
 315         }
 316
 317         f = find_function(p, function);
 318
 319         if (strcmp(inout, "in") == 0 ||
 320             strcmp(inout, "request") == 0) {
 321                 flags = NDR_IN;
 322                 in_pipes = &f->in_pipes;
 323         } else if (strcmp(inout, "out") == 0 ||
 324                    strcmp(inout, "response") == 0) {
 325                 flags = NDR_OUT;
 326                 out_pipes = &f->out_pipes;
 327         } else {
 328                 printf("Bad inout value '%s'\n", inout);
 329                 exit(1);
 330         }
 331
 332         mem_ctx = talloc_init("ndrdump");
 333
 334         st = talloc_zero_size(mem_ctx, f->struct_size);
 335         if (!st) {
 336                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 337                 exit(1);
 338         }
 339
 340         v_st = talloc_zero_size(mem_ctx, f->struct_size);
 341         if (!v_st) {
 342                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 343                 exit(1);
 344         }
 345
 346         if (ctx_filename) {
 347                 if (flags == NDR_IN) {
 348                         printf("Context file can only be used for \"out\" packages\n");
 349                         exit(1);
 350                 }
 351
 352                 data = (uint8_t *)file_load(ctx_filename, &size, 0, mem_ctx);
 353                 if (!data) {
 354                         perror(ctx_filename);
 355                         exit(1);
 356                 }
 357
 358                 blob.data = data;
 359                 blob.length = size;
 360
 361                 ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 362                 if (ndr_pull == NULL) {
 363                         perror("ndr_pull_init_blob");
 364                         exit(1);
 365                 }
 366                 ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 367                 if (assume_ndr64) {
 368                         ndr_pull->flags |= LIBNDR_FLAG_NDR64;
 369                 }
 370
 371                 ndr_err = f->ndr_pull(ndr_pull, NDR_IN, st);
 372
 373                 if (ndr_pull->offset > ndr_pull->relative_highest_offset) {
 374                         highest_ofs = ndr_pull->offset;
 375                 } else {
 376                         highest_ofs = ndr_pull->relative_highest_offset;
 377                 }
 378
 379                 if (highest_ofs != ndr_pull->data_size) {
 380                         printf("WARNING! %d unread bytes while parsing context file\n", ndr_pull->data_size - highest_ofs);
 381                 }
 382
 383                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 384                         status = ndr_map_error2ntstatus(ndr_err);
 385                         printf("pull for context file returned %s\n", nt_errstr(status));
 386                         exit(1);
 387                 }
 388                 memcpy(v_st, st, f->struct_size);
 389         }
 390
 391         if (filename)
 392                 data = (uint8_t *)file_load(filename, &size, 0, mem_ctx);
 393         else
 394                 data = (uint8_t *)stdin_load(mem_ctx, &size);
 395
 396         if (!data) {
 397                 if (filename)
 398                         perror(filename);
 399                 else
 400                         perror("stdin");
 401                 exit(1);
 402         }
 403
 404         if (hex_input) {
 405                 blob = hexdump_to_data_blob(mem_ctx, (char *)data, size);
 406         } else {
 407                 blob.data = data;
 408                 blob.length = size;
 409         }
 410
 411         ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 412         if (ndr_pull == NULL) {
 413                 perror("ndr_pull_init_blob");
 414                 exit(1);
 415         }
 416         ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 417         if (assume_ndr64) {
 418                 ndr_pull->flags |= LIBNDR_FLAG_NDR64;
 419         }
 420
 421         ndr_print = talloc_zero(mem_ctx, struct ndr_print);
 422         if (quiet) {
 423                 ndr_print->print = ndr_print_dummy;
 424         } else {
 425                 ndr_print->print = ndr_print_printf_helper;
 426         }
 427         ndr_print->depth = 1;
 428
 429         ndr_err = ndr_pop_dcerpc_sec_verification_trailer(ndr_pull, mem_ctx, &sec_vt);
 430         status = ndr_map_error2ntstatus(ndr_err);
 431         if (!NT_STATUS_IS_OK(status)) {
 432                 printf("ndr_pop_dcerpc_sec_verification_trailer returned %s\n",
 433                        nt_errstr(status));
 434         }
 435
 436         if (sec_vt != NULL && sec_vt->count.count > 0) {
 437                 printf("SEC_VT: consumed %d bytes\n",
 438                        (int)(blob.length - ndr_pull->data_size));
 439                 if (dumpdata) {
 440                         ndrdump_data(blob.data + ndr_pull->data_size,
 441                                      blob.length - ndr_pull->data_size,
 442                                      dumpdata);
 443                 }
 444                 ndr_print_dcerpc_sec_verification_trailer(ndr_print, "SEC_VT", sec_vt);
 445         }
 446         TALLOC_FREE(sec_vt);
 447
 448         if (out_pipes) {
 449                 status = ndrdump_pull_and_print_pipes(function, ndr_pull, ndr_print, out_pipes);
 450                 if (!NT_STATUS_IS_OK(status)) {
 451                         printf("dump FAILED\n");
 452                         exit(1);
 453                 }
 454         }
 455
 456         ndr_err = f->ndr_pull(ndr_pull, flags, st);
 457         status = ndr_map_error2ntstatus(ndr_err);
 458
 459         printf("pull returned %s\n", nt_errstr(status));
 460
 461         if (ndr_pull->offset > ndr_pull->relative_highest_offset) {
 462                 highest_ofs = ndr_pull->offset;
 463         } else {
 464                 highest_ofs = ndr_pull->relative_highest_offset;
 465         }
 466
 467         if (highest_ofs != ndr_pull->data_size) {
 468                 printf("WARNING! %d unread bytes\n", ndr_pull->data_size - highest_ofs);
 469                 ndrdump_data(ndr_pull->data+highest_ofs,
 470                              ndr_pull->data_size - highest_ofs,
 471                              dumpdata);
 472         }
 473
 474         if (dumpdata) {
 475                 printf("%d bytes consumed\n", highest_ofs);
 476                 ndrdump_data(blob.data, blob.length, dumpdata);
 477         }
 478
 479         f->ndr_print(ndr_print, function, flags, st);
 480
 481         if (!NT_STATUS_IS_OK(status)) {
 482                 printf("dump FAILED\n");
 483                 exit(1);
 484         }
 485
 486         if (in_pipes) {
 487                 status = ndrdump_pull_and_print_pipes(function, ndr_pull, ndr_print, in_pipes);
 488                 if (!NT_STATUS_IS_OK(status)) {
 489                         printf("dump FAILED\n");
 490                         exit(1);
 491                 }
 492         }
 493
 494         if (validate) {
 495                 DATA_BLOB v_blob;
 496                 struct ndr_push *ndr_v_push;
 497                 struct ndr_pull *ndr_v_pull;
 498                 struct ndr_print *ndr_v_print;
 499                 uint32_t highest_v_ofs;
 500                 uint32_t i;
 501                 uint8_t byte_a, byte_b;
 502                 bool differ;
 503
 504                 ndr_v_push = ndr_push_init_ctx(mem_ctx);
 505                 if (ndr_v_push == NULL) {
 506                         printf("No memory\n");
 507                         exit(1);
 508                 }
 509
 510                 if (assume_ndr64) {
 511                         ndr_v_push->flags |= LIBNDR_FLAG_NDR64;
 512                 }
 513
 514                 ndr_err = f->ndr_push(ndr_v_push, flags, st);
 515                 status = ndr_map_error2ntstatus(ndr_err);
 516                 printf("push returned %s\n", nt_errstr(status));
 517                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 518                         printf("validate push FAILED\n");
 519                         exit(1);
 520                 }
 521
 522                 v_blob = ndr_push_blob(ndr_v_push);
 523
 524                 if (dumpdata) {
 525                         printf("%ld bytes generated (validate)\n", (long)v_blob.length);
 526                         ndrdump_data(v_blob.data, v_blob.length, dumpdata);
 527                 }
 528
 529                 ndr_v_pull = ndr_pull_init_blob(&v_blob, mem_ctx);
 530                 if (ndr_v_pull == NULL) {
 531                         perror("ndr_pull_init_blob");
 532                         exit(1);
 533                 }
 534                 ndr_v_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 535
 536                 ndr_err = f->ndr_pull(ndr_v_pull, flags, v_st);
 537                 status = ndr_map_error2ntstatus(ndr_err);
 538                 printf("pull returned %s\n", nt_errstr(status));
 539                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 540                         printf("validate pull FAILED\n");
 541                         exit(1);
 542                 }
 543
 544                 if (ndr_v_pull->offset > ndr_v_pull->relative_highest_offset) {
 545                         highest_v_ofs = ndr_v_pull->offset;
 546                 } else {
 547                         highest_v_ofs = ndr_v_pull->relative_highest_offset;
 548                 }
 549
 550                 if (highest_v_ofs != ndr_v_pull->data_size) {
 551                         printf("WARNING! %d unread bytes in validation\n",
 552                                ndr_v_pull->data_size - highest_v_ofs);
 553                         ndrdump_data(ndr_v_pull->data + highest_v_ofs,
 554                                      ndr_v_pull->data_size - highest_v_ofs,
 555                                      dumpdata);
 556                 }
 557
 558                 ndr_v_print = talloc_zero(mem_ctx, struct ndr_print);
 559                 ndr_v_print->print = ndr_print_debug_helper;
 560                 ndr_v_print->depth = 1;
 561                 f->ndr_print(ndr_v_print, function, flags, v_st);
 562
 563                 if (blob.length != v_blob.length) {
 564                         printf("WARNING! orig bytes:%llu validated pushed bytes:%llu\n",
 565                                (unsigned long long)blob.length, (unsigned long long)v_blob.length);
 566                 }
 567
 568                 if (highest_ofs != highest_v_ofs) {
 569                         printf("WARNING! orig pulled bytes:%llu validated pulled bytes:%llu\n",
 570                                (unsigned long long)highest_ofs, (unsigned long long)highest_v_ofs);
 571                 }
 572
 573                 differ = false;
 574                 byte_a = 0x00;
 575                 byte_b = 0x00;
 576                 for (i=0; i < blob.length; i++) {
 577                         byte_a = blob.data[i];
 578
 579                         if (i == v_blob.length) {
 580                                 byte_b = 0x00;
 581                                 differ = true;
 582                                 break;
 583                         }
 584
 585                         byte_b = v_blob.data[i];
 586
 587                         if (byte_a != byte_b) {
 588                                 differ = true;
 589                                 break;
 590                         }
 591                 }
 592                 if (differ) {
 593                         printf("WARNING! orig and validated differ at byte 0x%02X (%u)\n", i, i);
 594                         printf("WARNING! orig byte[0x%02X] = 0x%02X validated byte[0x%02X] = 0x%02X\n",
 595                                 i, byte_a, i, byte_b);
 596                 }
 597         }
 598
 599         printf("dump OK\n");
 600         talloc_free(mem_ctx);
 601
 602         poptFreeContext(pc);
 603
 604         return 0;
 605 }