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  int main(int argc, const char *argv[])
 141 {
 142         const struct ndr_interface_table *p = NULL;
 143         const struct ndr_interface_call *f;
 144         const char *pipe_name, *function, *inout, *filename;
 145         uint8_t *data;
 146         size_t size;
 147         DATA_BLOB blob;
 148         struct ndr_pull *ndr_pull;
 149         struct ndr_print *ndr_print;
 150         TALLOC_CTX *mem_ctx;
 151         int flags;
 152         poptContext pc;
 153         NTSTATUS status;
 154         enum ndr_err_code ndr_err;
 155         void *st;
 156         void *v_st;
 157         const char *ctx_filename = NULL;
 158         const char *plugin = NULL;
 159         bool validate = false;
 160         bool dumpdata = false;
 161         bool assume_ndr64 = false;
 162         int opt;
 163         enum {OPT_CONTEXT_FILE=1000, OPT_VALIDATE, OPT_DUMP_DATA, OPT_LOAD_DSO, OPT_NDR64};
 164         struct poptOption long_options[] = {
 165                 POPT_AUTOHELP
 166                 {"context-file", 'c', POPT_ARG_STRING, NULL, OPT_CONTEXT_FILE, "In-filename to parse first", "CTX-FILE" },
 167                 {"validate", 0, POPT_ARG_NONE, NULL, OPT_VALIDATE, "try to validate the data", NULL },
 168                 {"dump-data", 0, POPT_ARG_NONE, NULL, OPT_DUMP_DATA, "dump the hex data", NULL },
 169                 {"load-dso", 'l', POPT_ARG_STRING, NULL, OPT_LOAD_DSO, "load from shared object file", NULL },
 170                 {"ndr64", 0, POPT_ARG_NONE, NULL, OPT_NDR64, "Assume NDR64 data", NULL },
 171                 POPT_COMMON_SAMBA
 172                 POPT_COMMON_VERSION
 173                 { NULL }
 174         };
 175
 176         ndr_table_init();
 177
 178         /* Initialise samba stuff */
 179         load_case_tables();
 180
 181         setlinebuf(stdout);
 182
 183         setup_logging("ndrdump", DEBUG_STDOUT);
 184
 185         pc = poptGetContext("ndrdump", argc, argv, long_options, 0);
 186
 187         poptSetOtherOptionHelp(
 188                 pc, "<pipe|uuid> <function> <inout> [<filename>]");
 189
 190         while ((opt = poptGetNextOpt(pc)) != -1) {
 191                 switch (opt) {
 192                 case OPT_CONTEXT_FILE:
 193                         ctx_filename = poptGetOptArg(pc);
 194                         break;
 195                 case OPT_VALIDATE:
 196                         validate = true;
 197                         break;
 198                 case OPT_DUMP_DATA:
 199                         dumpdata = true;
 200                         break;
 201                 case OPT_LOAD_DSO:
 202                         plugin = poptGetOptArg(pc);
 203                         break;
 204                 case OPT_NDR64:
 205                         assume_ndr64 = true;
 206                         break;
 207                 }
 208         }
 209
 210         pipe_name = poptGetArg(pc);
 211
 212         if (!pipe_name) {
 213                 poptPrintUsage(pc, stderr, 0);
 214                 show_pipes();
 215                 exit(1);
 216         }
 217
 218         if (plugin != NULL) {
 219                 p = load_iface_from_plugin(plugin, pipe_name);
 220         }
 221         if (!p) {
 222                 p = ndr_table_by_name(pipe_name);
 223         }
 224
 225         if (!p) {
 226                 struct GUID uuid;
 227
 228                 status = GUID_from_string(pipe_name, &uuid);
 229
 230                 if (NT_STATUS_IS_OK(status)) {
 231                         p = ndr_table_by_uuid(&uuid);
 232                 }
 233         }
 234
 235         if (!p) {
 236                 printf("Unknown pipe or UUID '%s'\n", pipe_name);
 237                 exit(1);
 238         }
 239
 240         function = poptGetArg(pc);
 241         inout = poptGetArg(pc);
 242         filename = poptGetArg(pc);
 243
 244         if (!function || !inout) {
 245                 poptPrintUsage(pc, stderr, 0);
 246                 show_functions(p);
 247                 exit(1);
 248         }
 249
 250         if (strcmp(inout, "in") == 0 ||
 251             strcmp(inout, "request") == 0) {
 252                 flags = NDR_IN;
 253         } else if (strcmp(inout, "out") == 0 ||
 254                    strcmp(inout, "response") == 0) {
 255                 flags = NDR_OUT;
 256         } else {
 257                 printf("Bad inout value '%s'\n", inout);
 258                 exit(1);
 259         }
 260
 261         f = find_function(p, function);
 262
 263         mem_ctx = talloc_init("ndrdump");
 264
 265         st = talloc_zero_size(mem_ctx, f->struct_size);
 266         if (!st) {
 267                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 268                 exit(1);
 269         }
 270
 271         v_st = talloc_zero_size(mem_ctx, f->struct_size);
 272         if (!v_st) {
 273                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 274                 exit(1);
 275         }
 276
 277         if (ctx_filename) {
 278                 if (flags == NDR_IN) {
 279                         printf("Context file can only be used for \"out\" packages\n");
 280                         exit(1);
 281                 }
 282
 283                 data = (uint8_t *)file_load(ctx_filename, &size, 0, mem_ctx);
 284                 if (!data) {
 285                         perror(ctx_filename);
 286                         exit(1);
 287                 }
 288
 289                 blob.data = data;
 290                 blob.length = size;
 291
 292                 ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 293                 ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 294                 if (assume_ndr64) {
 295                         ndr_pull->flags |= LIBNDR_FLAG_NDR64;
 296                 }
 297
 298                 ndr_err = f->ndr_pull(ndr_pull, NDR_IN, st);
 299
 300                 if (ndr_pull->offset != ndr_pull->data_size) {
 301                         printf("WARNING! %d unread bytes while parsing context file\n", ndr_pull->data_size - ndr_pull->offset);
 302                 }
 303
 304                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 305                         status = ndr_map_error2ntstatus(ndr_err);
 306                         printf("pull for context file returned %s\n", nt_errstr(status));
 307                         exit(1);
 308                 }
 309                 memcpy(v_st, st, f->struct_size);
 310         }
 311
 312         if (filename)
 313                 data = (uint8_t *)file_load(filename, &size, 0, mem_ctx);
 314         else
 315                 data = (uint8_t *)stdin_load(mem_ctx, &size);
 316
 317         if (!data) {
 318                 if (filename)
 319                         perror(filename);
 320                 else
 321                         perror("stdin");
 322                 exit(1);
 323         }
 324
 325         blob.data = data;
 326         blob.length = size;
 327
 328         ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 329         ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 330         if (assume_ndr64) {
 331                 ndr_pull->flags |= LIBNDR_FLAG_NDR64;
 332         }
 333
 334         ndr_err = f->ndr_pull(ndr_pull, flags, st);
 335         status = ndr_map_error2ntstatus(ndr_err);
 336
 337         printf("pull returned %s\n", nt_errstr(status));
 338
 339         if (ndr_pull->offset != ndr_pull->data_size) {
 340                 printf("WARNING! %d unread bytes\n", ndr_pull->data_size - ndr_pull->offset);
 341                 ndrdump_data(ndr_pull->data+ndr_pull->offset,
 342                              ndr_pull->data_size - ndr_pull->offset,
 343                              dumpdata);
 344         }
 345
 346         if (dumpdata) {
 347                 printf("%d bytes consumed\n", ndr_pull->offset);
 348                 ndrdump_data(blob.data, blob.length, dumpdata);
 349         }
 350
 351         ndr_print = talloc_zero(mem_ctx, struct ndr_print);
 352         ndr_print->print = ndr_print_printf_helper;
 353         ndr_print->depth = 1;
 354         f->ndr_print(ndr_print, function, flags, st);
 355
 356         if (!NT_STATUS_IS_OK(status)) {
 357                 printf("dump FAILED\n");
 358                 exit(1);
 359         }
 360
 361         if (validate) {
 362                 DATA_BLOB v_blob;
 363                 struct ndr_push *ndr_v_push;
 364                 struct ndr_pull *ndr_v_pull;
 365                 struct ndr_print *ndr_v_print;
 366                 uint32_t i;
 367                 uint8_t byte_a, byte_b;
 368                 bool differ;
 369
 370                 ndr_v_push = ndr_push_init_ctx(mem_ctx);
 371
 372                 ndr_err = f->ndr_push(ndr_v_push, flags, st);
 373                 status = ndr_map_error2ntstatus(ndr_err);
 374                 printf("push returned %s\n", nt_errstr(status));
 375                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 376                         printf("validate push FAILED\n");
 377                         exit(1);
 378                 }
 379
 380                 v_blob = ndr_push_blob(ndr_v_push);
 381
 382                 if (dumpdata) {
 383                         printf("%ld bytes generated (validate)\n", (long)v_blob.length);
 384                         ndrdump_data(v_blob.data, v_blob.length, dumpdata);
 385                 }
 386
 387                 ndr_v_pull = ndr_pull_init_blob(&v_blob, mem_ctx);
 388                 ndr_v_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 389
 390                 ndr_err = f->ndr_pull(ndr_v_pull, flags, v_st);
 391                 status = ndr_map_error2ntstatus(ndr_err);
 392                 printf("pull returned %s\n", nt_errstr(status));
 393                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 394                         printf("validate pull FAILED\n");
 395                         exit(1);
 396                 }
 397
 398
 399                 if (ndr_v_pull->offset != ndr_v_pull->data_size) {
 400                         printf("WARNING! %d unread bytes in validation\n", ndr_v_pull->data_size - ndr_v_pull->offset);
 401                         ndrdump_data(ndr_v_pull->data+ndr_v_pull->offset,
 402                                      ndr_v_pull->data_size - ndr_v_pull->offset,
 403                                      dumpdata);
 404                 }
 405
 406                 ndr_v_print = talloc_zero(mem_ctx, struct ndr_print);
 407                 ndr_v_print->print = ndr_print_debug_helper;
 408                 ndr_v_print->depth = 1;
 409                 f->ndr_print(ndr_v_print, function, flags, v_st);
 410
 411                 if (blob.length != v_blob.length) {
 412                         printf("WARNING! orig bytes:%llu validated pushed bytes:%llu\n",
 413                                (unsigned long long)blob.length, (unsigned long long)v_blob.length);
 414                 }
 415
 416                 if (ndr_pull->offset != ndr_v_pull->offset) {
 417                         printf("WARNING! orig pulled bytes:%llu validated pulled bytes:%llu\n",
 418                                (unsigned long long)ndr_pull->offset, (unsigned long long)ndr_v_pull->offset);
 419                 }
 420
 421                 differ = false;
 422                 byte_a = 0x00;
 423                 byte_b = 0x00;
 424                 for (i=0; i < blob.length; i++) {
 425                         byte_a = blob.data[i];
 426
 427                         if (i == v_blob.length) {
 428                                 byte_b = 0x00;
 429                                 differ = true;
 430                                 break;
 431                         }
 432
 433                         byte_b = v_blob.data[i];
 434
 435                         if (byte_a != byte_b) {
 436                                 differ = true;
 437                                 break;
 438                         }
 439                 }
 440                 if (differ) {
 441                         printf("WARNING! orig and validated differ at byte 0x%02X (%u)\n", i, i);
 442                         printf("WARNING! orig byte[0x%02X] = 0x%02X validated byte[0x%02X] = 0x%02X\n",
 443                                 i, byte_a, i, byte_b);
 444                 }
 445         }
 446
 447         printf("dump OK\n");
 448
 449         talloc_free(mem_ctx);
 450
 451         poptFreeContext(pc);
 452
 453         return 0;
 454 }