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 #if (_SAMBA_BUILD_ >= 4)
  27 #include "lib/cmdline/popt_common.h"
  28 #include "param/param.h"
  29 #endif
  30
  31 static const struct ndr_interface_call *find_function(
  32         const struct ndr_interface_table *p,
  33         const char *function)
  34 {
  35         int i;
  36         if (isdigit(function[0])) {
  37                 i = strtol(function, NULL, 0);
  38                 return &p->calls[i];
  39         }
  40         for (i=0;i<p->num_calls;i++) {
  41                 if (strcmp(p->calls[i].name, function) == 0) {
  42                         break;
  43                 }
  44         }
  45         if (i == p->num_calls) {
  46                 printf("Function '%s' not found\n", function);
  47                 exit(1);
  48         }
  49         return &p->calls[i];
  50 }
  51
  52 _NORETURN_ static void show_pipes(void)
  53 {
  54         const struct ndr_interface_list *l;
  55         printf("\nYou must specify a pipe\n");
  56         printf("known pipes are:\n");
  57         for (l=ndr_table_list();l;l=l->next) {
  58                 if(l->table->helpstring) {
  59                         printf("\t%s - %s\n", l->table->name, l->table->helpstring);
  60                 } else {
  61                         printf("\t%s\n", l->table->name);
  62                 }
  63         }
  64         exit(1);
  65 }
  66
  67 _NORETURN_ static void show_functions(const struct ndr_interface_table *p)
  68 {
  69         int i;
  70         printf("\nYou must specify a function\n");
  71         printf("known functions on '%s' are:\n", p->name);
  72         for (i=0;i<p->num_calls;i++) {
  73                 printf("\t0x%02x (%2d) %s\n", i, i, p->calls[i].name);
  74         }
  75         exit(1);
  76 }
  77
  78 static char *stdin_load(TALLOC_CTX *mem_ctx, size_t *size)
  79 {
  80         int num_read, total_len = 0;
  81         char buf[255];
  82         char *result = NULL;
  83
  84         while((num_read = read(STDIN_FILENO, buf, 255)) > 0) {
  85
  86                 if (result) {
  87                         result = talloc_realloc(
  88                                 mem_ctx, result, char, total_len + num_read);
  89                 } else {
  90                         result = talloc_array(mem_ctx, char, num_read);
  91                 }
  92
  93                 memcpy(result + total_len, buf, num_read);
  94
  95                 total_len += num_read;
  96         }
  97
  98         if (size)
  99                 *size = total_len;
 100
 101         return result;
 102 }
 103
 104 static const struct ndr_interface_table *load_iface_from_plugin(const char *plugin, const char *pipe_name)
 105 {
 106         const struct ndr_interface_table *p;
 107         void *handle;
 108         char *symbol;
 109
 110         handle = dlopen(plugin, RTLD_NOW);
 111         if (handle == NULL) {
 112                 printf("%s: Unable to open: %s\n", plugin, dlerror());
 113                 return NULL;
 114         }
 115
 116         symbol = talloc_asprintf(NULL, "ndr_table_%s", pipe_name);
 117         p = (const struct ndr_interface_table *)dlsym(handle, symbol);
 118
 119         if (!p) {
 120                 printf("%s: Unable to find DCE/RPC interface table for '%s': %s\n", plugin, pipe_name, dlerror());
 121                 talloc_free(symbol);
 122                 return NULL;
 123         }
 124
 125         talloc_free(symbol);
 126
 127         return p;
 128 }
 129
 130 static void printf_cb(const char *buf, void *private_data)
 131 {
 132         printf("%s", buf);
 133 }
 134
 135 static void ndrdump_data(uint8_t *d, uint32_t l, bool force)
 136 {
 137         dump_data_cb(d, l, !force, printf_cb, NULL);
 138 }
 139
 140 static NTSTATUS ndrdump_pull_and_print_pipes(const char *function,
 141                                 struct ndr_pull *ndr_pull,
 142                                 struct ndr_print *ndr_print,
 143                                 const struct ndr_interface_call_pipes *pipes)
 144 {
 145         NTSTATUS status;
 146         enum ndr_err_code ndr_err;
 147         uint32_t i;
 148
 149         for (i=0; i < pipes->num_pipes; i++) {
 150                 uint64_t idx = 0;
 151                 while (true) {
 152                         uint32_t *count;
 153                         void *c;
 154                         char *n;
 155
 156                         c = talloc_zero_size(ndr_pull, pipes->pipes[i].chunk_struct_size);
 157                         talloc_set_name(c, "struct %s", pipes->pipes[i].name);
 158                         /*
 159                          * Note: the first struct member is always
 160                          * 'uint32_t count;'
 161                          */
 162                         count = (uint32_t *)c;
 163
 164                         n = talloc_asprintf(c, "%s: %s[%llu]",
 165                                         function, pipes->pipes[i].name,
 166                                         (unsigned long long)idx);
 167
 168                         ndr_err = pipes->pipes[i].ndr_pull(ndr_pull, NDR_SCALARS, c);
 169                         status = ndr_map_error2ntstatus(ndr_err);
 170
 171                         printf("pull returned %s\n", nt_errstr(status));
 172                         if (!NT_STATUS_IS_OK(status)) {
 173                                 return status;
 174                         }
 175                         pipes->pipes[i].ndr_print(ndr_print, n, c);
 176
 177                         if (*count == 0) {
 178                                 break;
 179                         }
 180                         idx++;
 181                 }
 182         }
 183
 184         return NT_STATUS_OK;
 185 }
 186
 187  int main(int argc, const char *argv[])
 188 {
 189         const struct ndr_interface_table *p = NULL;
 190         const struct ndr_interface_call *f;
 191         const char *pipe_name, *function, *inout, *filename;
 192         uint8_t *data;
 193         size_t size;
 194         DATA_BLOB blob;
 195         struct ndr_pull *ndr_pull;
 196         struct ndr_print *ndr_print;
 197         TALLOC_CTX *mem_ctx;
 198         int flags;
 199         poptContext pc;
 200         NTSTATUS status;
 201         enum ndr_err_code ndr_err;
 202         void *st;
 203         void *v_st;
 204         const char *ctx_filename = NULL;
 205         const char *plugin = NULL;
 206         bool validate = false;
 207         bool dumpdata = false;
 208         bool assume_ndr64 = false;
 209         int opt;
 210         enum {OPT_CONTEXT_FILE=1000, OPT_VALIDATE, OPT_DUMP_DATA, OPT_LOAD_DSO, OPT_NDR64};
 211         struct poptOption long_options[] = {
 212                 POPT_AUTOHELP
 213                 {"context-file", 'c', POPT_ARG_STRING, NULL, OPT_CONTEXT_FILE, "In-filename to parse first", "CTX-FILE" },
 214                 {"validate", 0, POPT_ARG_NONE, NULL, OPT_VALIDATE, "try to validate the data", NULL },
 215                 {"dump-data", 0, POPT_ARG_NONE, NULL, OPT_DUMP_DATA, "dump the hex data", NULL },
 216                 {"load-dso", 'l', POPT_ARG_STRING, NULL, OPT_LOAD_DSO, "load from shared object file", NULL },
 217                 {"ndr64", 0, POPT_ARG_NONE, NULL, OPT_NDR64, "Assume NDR64 data", NULL },
 218                 POPT_COMMON_SAMBA
 219                 POPT_COMMON_VERSION
 220                 { NULL }
 221         };
 222         struct ndr_interface_call_pipes *in_pipes = NULL;
 223         struct ndr_interface_call_pipes *out_pipes = NULL;
 224
 225         ndr_table_init();
 226
 227         /* Initialise samba stuff */
 228         load_case_tables();
 229
 230         setlinebuf(stdout);
 231
 232         setup_logging("ndrdump", DEBUG_STDOUT);
 233
 234         pc = poptGetContext("ndrdump", argc, argv, long_options, 0);
 235
 236         poptSetOtherOptionHelp(
 237                 pc, "<pipe|uuid> <function> <inout> [<filename>]");
 238
 239         while ((opt = poptGetNextOpt(pc)) != -1) {
 240                 switch (opt) {
 241                 case OPT_CONTEXT_FILE:
 242                         ctx_filename = poptGetOptArg(pc);
 243                         break;
 244                 case OPT_VALIDATE:
 245                         validate = true;
 246                         break;
 247                 case OPT_DUMP_DATA:
 248                         dumpdata = true;
 249                         break;
 250                 case OPT_LOAD_DSO:
 251                         plugin = poptGetOptArg(pc);
 252                         break;
 253                 case OPT_NDR64:
 254                         assume_ndr64 = true;
 255                         break;
 256                 }
 257         }
 258
 259         pipe_name = poptGetArg(pc);
 260
 261         if (!pipe_name) {
 262                 poptPrintUsage(pc, stderr, 0);
 263                 show_pipes();
 264                 exit(1);
 265         }
 266
 267         if (plugin != NULL) {
 268                 p = load_iface_from_plugin(plugin, pipe_name);
 269         }
 270         if (!p) {
 271                 p = ndr_table_by_name(pipe_name);
 272         }
 273
 274         if (!p) {
 275                 struct GUID uuid;
 276
 277                 status = GUID_from_string(pipe_name, &uuid);
 278
 279                 if (NT_STATUS_IS_OK(status)) {
 280                         p = ndr_table_by_uuid(&uuid);
 281                 }
 282         }
 283
 284         if (!p) {
 285                 printf("Unknown pipe or UUID '%s'\n", pipe_name);
 286                 exit(1);
 287         }
 288
 289         function = poptGetArg(pc);
 290         inout = poptGetArg(pc);
 291         filename = poptGetArg(pc);
 292
 293         if (!function || !inout) {
 294                 poptPrintUsage(pc, stderr, 0);
 295                 show_functions(p);
 296                 exit(1);
 297         }
 298
 299         f = find_function(p, function);
 300
 301         if (strcmp(inout, "in") == 0 ||
 302             strcmp(inout, "request") == 0) {
 303                 flags = NDR_IN;
 304                 in_pipes = &f->in_pipes;
 305         } else if (strcmp(inout, "out") == 0 ||
 306                    strcmp(inout, "response") == 0) {
 307                 flags = NDR_OUT;
 308                 out_pipes = &f->out_pipes;
 309         } else {
 310                 printf("Bad inout value '%s'\n", inout);
 311                 exit(1);
 312         }
 313
 314         mem_ctx = talloc_init("ndrdump");
 315
 316         st = talloc_zero_size(mem_ctx, f->struct_size);
 317         if (!st) {
 318                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 319                 exit(1);
 320         }
 321
 322         v_st = talloc_zero_size(mem_ctx, f->struct_size);
 323         if (!v_st) {
 324                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 325                 exit(1);
 326         }
 327
 328         if (ctx_filename) {
 329                 if (flags == NDR_IN) {
 330                         printf("Context file can only be used for \"out\" packages\n");
 331                         exit(1);
 332                 }
 333
 334                 data = (uint8_t *)file_load(ctx_filename, &size, 0, mem_ctx);
 335                 if (!data) {
 336                         perror(ctx_filename);
 337                         exit(1);
 338                 }
 339
 340                 blob.data = data;
 341                 blob.length = size;
 342
 343                 ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 344                 ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 345                 if (assume_ndr64) {
 346                         ndr_pull->flags |= LIBNDR_FLAG_NDR64;
 347                 }
 348
 349                 ndr_err = f->ndr_pull(ndr_pull, NDR_IN, st);
 350
 351                 if (ndr_pull->offset != ndr_pull->data_size) {
 352                         printf("WARNING! %d unread bytes while parsing context file\n", ndr_pull->data_size - ndr_pull->offset);
 353                 }
 354
 355                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 356                         status = ndr_map_error2ntstatus(ndr_err);
 357                         printf("pull for context file returned %s\n", nt_errstr(status));
 358                         exit(1);
 359                 }
 360                 memcpy(v_st, st, f->struct_size);
 361         }
 362
 363         if (filename)
 364                 data = (uint8_t *)file_load(filename, &size, 0, mem_ctx);
 365         else
 366                 data = (uint8_t *)stdin_load(mem_ctx, &size);
 367
 368         if (!data) {
 369                 if (filename)
 370                         perror(filename);
 371                 else
 372                         perror("stdin");
 373                 exit(1);
 374         }
 375
 376         blob.data = data;
 377         blob.length = size;
 378
 379         ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 380         ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 381         if (assume_ndr64) {
 382                 ndr_pull->flags |= LIBNDR_FLAG_NDR64;
 383         }
 384
 385         ndr_print = talloc_zero(mem_ctx, struct ndr_print);
 386         ndr_print->print = ndr_print_printf_helper;
 387         ndr_print->depth = 1;
 388
 389         if (out_pipes) {
 390                 status = ndrdump_pull_and_print_pipes(function, ndr_pull, ndr_print, out_pipes);
 391                 if (!NT_STATUS_IS_OK(status)) {
 392                         printf("dump FAILED\n");
 393                         exit(1);
 394                 }
 395         }
 396
 397         ndr_err = f->ndr_pull(ndr_pull, flags, st);
 398         status = ndr_map_error2ntstatus(ndr_err);
 399
 400         printf("pull returned %s\n", nt_errstr(status));
 401
 402         if (ndr_pull->offset != ndr_pull->data_size) {
 403                 printf("WARNING! %d unread bytes\n", ndr_pull->data_size - ndr_pull->offset);
 404                 ndrdump_data(ndr_pull->data+ndr_pull->offset,
 405                              ndr_pull->data_size - ndr_pull->offset,
 406                              dumpdata);
 407         }
 408
 409         if (dumpdata) {
 410                 printf("%d bytes consumed\n", ndr_pull->offset);
 411                 ndrdump_data(blob.data, blob.length, dumpdata);
 412         }
 413
 414         f->ndr_print(ndr_print, function, flags, st);
 415
 416         if (!NT_STATUS_IS_OK(status)) {
 417                 printf("dump FAILED\n");
 418                 exit(1);
 419         }
 420
 421         if (in_pipes) {
 422                 status = ndrdump_pull_and_print_pipes(function, ndr_pull, ndr_print, in_pipes);
 423                 if (!NT_STATUS_IS_OK(status)) {
 424                         printf("dump FAILED\n");
 425                         exit(1);
 426                 }
 427         }
 428
 429         if (validate) {
 430                 DATA_BLOB v_blob;
 431                 struct ndr_push *ndr_v_push;
 432                 struct ndr_pull *ndr_v_pull;
 433                 struct ndr_print *ndr_v_print;
 434                 uint32_t i;
 435                 uint8_t byte_a, byte_b;
 436                 bool differ;
 437
 438                 ndr_v_push = ndr_push_init_ctx(mem_ctx);
 439
 440                 ndr_err = f->ndr_push(ndr_v_push, flags, st);
 441                 status = ndr_map_error2ntstatus(ndr_err);
 442                 printf("push returned %s\n", nt_errstr(status));
 443                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 444                         printf("validate push FAILED\n");
 445                         exit(1);
 446                 }
 447
 448                 v_blob = ndr_push_blob(ndr_v_push);
 449
 450                 if (dumpdata) {
 451                         printf("%ld bytes generated (validate)\n", (long)v_blob.length);
 452                         ndrdump_data(v_blob.data, v_blob.length, dumpdata);
 453                 }
 454
 455                 ndr_v_pull = ndr_pull_init_blob(&v_blob, mem_ctx);
 456                 ndr_v_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 457
 458                 ndr_err = f->ndr_pull(ndr_v_pull, flags, v_st);
 459                 status = ndr_map_error2ntstatus(ndr_err);
 460                 printf("pull returned %s\n", nt_errstr(status));
 461                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 462                         printf("validate pull FAILED\n");
 463                         exit(1);
 464                 }
 465
 466
 467                 if (ndr_v_pull->offset != ndr_v_pull->data_size) {
 468                         printf("WARNING! %d unread bytes in validation\n", ndr_v_pull->data_size - ndr_v_pull->offset);
 469                         ndrdump_data(ndr_v_pull->data+ndr_v_pull->offset,
 470                                      ndr_v_pull->data_size - ndr_v_pull->offset,
 471                                      dumpdata);
 472                 }
 473
 474                 ndr_v_print = talloc_zero(mem_ctx, struct ndr_print);
 475                 ndr_v_print->print = ndr_print_debug_helper;
 476                 ndr_v_print->depth = 1;
 477                 f->ndr_print(ndr_v_print, function, flags, v_st);
 478
 479                 if (blob.length != v_blob.length) {
 480                         printf("WARNING! orig bytes:%llu validated pushed bytes:%llu\n",
 481                                (unsigned long long)blob.length, (unsigned long long)v_blob.length);
 482                 }
 483
 484                 if (ndr_pull->offset != ndr_v_pull->offset) {
 485                         printf("WARNING! orig pulled bytes:%llu validated pulled bytes:%llu\n",
 486                                (unsigned long long)ndr_pull->offset, (unsigned long long)ndr_v_pull->offset);
 487                 }
 488
 489                 differ = false;
 490                 byte_a = 0x00;
 491                 byte_b = 0x00;
 492                 for (i=0; i < blob.length; i++) {
 493                         byte_a = blob.data[i];
 494
 495                         if (i == v_blob.length) {
 496                                 byte_b = 0x00;
 497                                 differ = true;
 498                                 break;
 499                         }
 500
 501                         byte_b = v_blob.data[i];
 502
 503                         if (byte_a != byte_b) {
 504                                 differ = true;
 505                                 break;
 506                         }
 507                 }
 508                 if (differ) {
 509                         printf("WARNING! orig and validated differ at byte 0x%02X (%u)\n", i, i);
 510                         printf("WARNING! orig byte[0x%02X] = 0x%02X validated byte[0x%02X] = 0x%02X\n",
 511                                 i, byte_a, i, byte_b);
 512                 }
 513         }
 514
 515         printf("dump OK\n");
 516
 517         talloc_free(mem_ctx);
 518
 519         poptFreeContext(pc);
 520
 521         return 0;
 522 }