source/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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23 #if (_SAMBA_BUILD_ >= 4)
  24 #include "lib/cmdline/popt_common.h"
  25 #include "system/filesys.h"
  26 #include "system/locale.h"
  27 #include "librpc/rpc/dcerpc.h"
  28 #include "librpc/rpc/dcerpc_table.h"
  29 #endif
  30
  31 static const struct dcerpc_interface_call *find_function(
  32         const struct dcerpc_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 #if (_SAMBA_BUILD_ >= 4)
  53
  54 static void show_pipes(void)
  55 {
  56         const struct dcerpc_interface_list *l;
  57         printf("\nYou must specify a pipe\n");
  58         printf("known pipes are:\n");
  59         for (l=librpc_dcerpc_pipes();l;l=l->next) {
  60                 if(l->table->helpstring) {
  61                         printf("\t%s - %s\n", l->table->name, l->table->helpstring);
  62                 } else {
  63                         printf("\t%s\n", l->table->name);
  64                 }
  65         }
  66         exit(1);
  67 }
  68
  69 #endif
  70
  71 static void show_functions(const struct dcerpc_interface_table *p)
  72 {
  73         int i;
  74         printf("\nYou must specify a function\n");
  75         printf("known functions on '%s' are:\n", p->name);
  76         for (i=0;i<p->num_calls;i++) {
  77                 printf("\t0x%02x (%2d) %s\n", i, i, p->calls[i].name);
  78         }
  79         exit(1);
  80 }
  81
  82 static char *stdin_load(TALLOC_CTX *mem_ctx, size_t *size)
  83 {
  84         int num_read, total_len = 0;
  85         char buf[255];
  86         char *result = NULL;
  87
  88         while((num_read = read(STDIN_FILENO, buf, 255)) > 0) {
  89
  90                 if (result) {
  91                         result = (char *) talloc_realloc(
  92                                 mem_ctx, result, char *, total_len + num_read);
  93                 } else {
  94                         result = (char *) talloc_size(mem_ctx, num_read);
  95                 }
  96
  97                 memcpy(result + total_len, buf, num_read);
  98
  99                 total_len += num_read;
 100         }
 101
 102         if (size)
 103                 *size = total_len;
 104
 105         return result;
 106 }
 107
 108 static const struct dcerpc_interface_table *load_iface_from_plugin(const char *plugin, const char *pipe_name)
 109 {
 110         const struct dcerpc_interface_table *p;
 111         void *handle;
 112         char *symbol;
 113
 114         handle = dlopen(plugin, RTLD_NOW);
 115         if (handle == NULL) {
 116                 printf("%s: Unable to open: %s\n", plugin, dlerror());
 117                 return NULL;
 118         }
 119
 120         symbol = talloc_asprintf(NULL, "dcerpc_table_%s", pipe_name);
 121         p = (const struct dcerpc_interface_table *)dlsym(handle, symbol);
 122
 123         if (!p) {
 124                 printf("%s: Unable to find DCE/RPC interface table for '%s': %s\n", plugin, pipe_name, dlerror());
 125                 talloc_free(symbol);
 126                 return NULL;
 127         }
 128
 129         talloc_free(symbol);
 130
 131         return p;
 132 }
 133
 134  int main(int argc, const char *argv[])
 135 {
 136         const struct dcerpc_interface_table *p = NULL;
 137         const struct dcerpc_interface_call *f;
 138         const char *pipe_name, *function, *inout, *filename;
 139         uint8_t *data;
 140         size_t size;
 141         DATA_BLOB blob;
 142         struct ndr_pull *ndr_pull;
 143         struct ndr_print *ndr_print;
 144         TALLOC_CTX *mem_ctx;
 145         int flags;
 146         poptContext pc;
 147         NTSTATUS status;
 148         void *st;
 149         void *v_st;
 150         const char *ctx_filename = NULL;
 151         const char *plugin = NULL;
 152         bool validate = false;
 153         bool dumpdata = false;
 154         int opt;
 155         enum {OPT_CONTEXT_FILE=1000, OPT_VALIDATE, OPT_DUMP_DATA, OPT_LOAD_DSO};
 156         struct poptOption long_options[] = {
 157                 POPT_AUTOHELP
 158                 {"context-file", 'c', POPT_ARG_STRING, NULL, OPT_CONTEXT_FILE, "In-filename to parse first", "CTX-FILE" },
 159                 {"validate", 0, POPT_ARG_NONE, NULL, OPT_VALIDATE, "try to validate the data", NULL },
 160                 {"dump-data", 0, POPT_ARG_NONE, NULL, OPT_DUMP_DATA, "dump the hex data", NULL },
 161                 {"load-dso", 'l', POPT_ARG_STRING, NULL, OPT_LOAD_DSO, "load from shared object file", NULL },
 162                 POPT_COMMON_SAMBA
 163                 POPT_COMMON_VERSION
 164                 { NULL }
 165         };
 166
 167 #if (_SAMBA_BUILD_ >= 4)
 168         dcerpc_table_init();
 169 #else
 170         /* Initialise samba stuff */
 171         load_case_tables();
 172
 173         setlinebuf(stdout);
 174
 175         dbf = x_stderr;
 176
 177         setup_logging(argv[0],True);
 178 #endif
 179
 180         pc = poptGetContext("ndrdump", argc, argv, long_options, 0);
 181
 182         poptSetOtherOptionHelp(
 183                 pc, "<pipe|uuid> <function> <inout> [<filename>]");
 184
 185         while ((opt = poptGetNextOpt(pc)) != -1) {
 186                 switch (opt) {
 187                 case OPT_CONTEXT_FILE:
 188                         ctx_filename = poptGetOptArg(pc);
 189                         break;
 190                 case OPT_VALIDATE:
 191                         validate = true;
 192                         break;
 193                 case OPT_DUMP_DATA:
 194                         dumpdata = true;
 195                         break;
 196                 case OPT_LOAD_DSO:
 197                         plugin = poptGetOptArg(pc);
 198                         break;
 199                 }
 200         }
 201
 202         pipe_name = poptGetArg(pc);
 203
 204         if (!pipe_name) {
 205                 poptPrintUsage(pc, stderr, 0);
 206 #if (_SAMBA_BUILD_ >= 4)
 207                 show_pipes();
 208 #endif
 209                 exit(1);
 210         }
 211
 212         if (plugin != NULL) {
 213                 p = load_iface_from_plugin(plugin, pipe_name);
 214         }
 215 #if (_SAMBA_BUILD_ <= 3)
 216         else {
 217                 fprintf(stderr, "Only loading from DSO's supported in Samba 3\n");
 218                 exit(1);
 219         }
 220 #else
 221         if (!p) {
 222                 p = idl_iface_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 = idl_iface_by_uuid(&uuid);
 232                 }
 233         }
 234 #endif
 235
 236         if (!p) {
 237                 printf("Unknown pipe or UUID '%s'\n", pipe_name);
 238                 exit(1);
 239         }
 240
 241         function = poptGetArg(pc);
 242         inout = poptGetArg(pc);
 243         filename = poptGetArg(pc);
 244
 245         if (!function || !inout) {
 246                 poptPrintUsage(pc, stderr, 0);
 247                 show_functions(p);
 248                 exit(1);
 249         }
 250
 251         if (strcmp(inout, "in") == 0 ||
 252             strcmp(inout, "request") == 0) {
 253                 flags = NDR_IN;
 254         } else if (strcmp(inout, "out") == 0 ||
 255                    strcmp(inout, "response") == 0) {
 256                 flags = NDR_OUT;
 257         } else {
 258                 printf("Bad inout value '%s'\n", inout);
 259                 exit(1);
 260         }
 261
 262         f = find_function(p, function);
 263
 264         mem_ctx = talloc_init("ndrdump");
 265
 266         st = talloc_zero_size(mem_ctx, f->struct_size);
 267         if (!st) {
 268                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 269                 exit(1);
 270         }
 271
 272         v_st = talloc_zero_size(mem_ctx, f->struct_size);
 273         if (!v_st) {
 274                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 275                 exit(1);
 276         }
 277
 278         if (ctx_filename) {
 279                 if (flags == NDR_IN) {
 280                         printf("Context file can only be used for \"out\" packages\n");
 281                         exit(1);
 282                 }
 283
 284 #if (_SAMBA_BUILD_ >= 4)
 285                 data = (uint8_t *)file_load(ctx_filename, &size, mem_ctx);
 286 #else
 287                 data = (uint8_t *)file_load(ctx_filename, &size, 0);
 288 #endif
 289                 if (!data) {
 290                         perror(ctx_filename);
 291                         exit(1);
 292                 }
 293
 294                 blob.data = data;
 295                 blob.length = size;
 296
 297                 ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 298                 ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 299
 300                 status = f->ndr_pull(ndr_pull, NDR_IN, st);
 301
 302                 if (ndr_pull->offset != ndr_pull->data_size) {
 303                         printf("WARNING! %d unread bytes while parsing context file\n", ndr_pull->data_size - ndr_pull->offset);
 304                 }
 305
 306                 if (!NT_STATUS_IS_OK(status)) {
 307                         printf("pull for context file returned %s\n", nt_errstr(status));
 308                         exit(1);
 309                 }
 310                 memcpy(v_st, st, f->struct_size);
 311         }
 312
 313         if (filename)
 314 #if (_SAMBA_BUILD_ >= 4)
 315                 data = (uint8_t *)file_load(filename, &size, mem_ctx);
 316 #else
 317                 data = (uint8_t *)file_load(filename, &size, 0);
 318 #endif
 319         else
 320                 data = (uint8_t *)stdin_load(mem_ctx, &size);
 321
 322         if (!data) {
 323                 if (filename)
 324                         perror(filename);
 325                 else
 326                         perror("stdin");
 327                 exit(1);
 328         }
 329
 330         blob.data = data;
 331         blob.length = size;
 332
 333         ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 334         ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 335
 336         status = f->ndr_pull(ndr_pull, flags, st);
 337
 338         printf("pull returned %s\n", nt_errstr(status));
 339
 340         if (ndr_pull->offset != ndr_pull->data_size) {
 341                 printf("WARNING! %d unread bytes\n", ndr_pull->data_size - ndr_pull->offset);
 342                 dump_data(0, ndr_pull->data+ndr_pull->offset, ndr_pull->data_size - ndr_pull->offset);
 343         }
 344
 345         if (dumpdata) {
 346                 printf("%d bytes consumed\n", ndr_pull->offset);
 347                 dump_data(0, blob.data, blob.length);
 348         }
 349
 350         ndr_print = talloc_zero(mem_ctx, struct ndr_print);
 351         ndr_print->print = ndr_print_debug_helper;
 352         ndr_print->depth = 1;
 353         f->ndr_print(ndr_print, function, flags, st);
 354
 355         if (!NT_STATUS_IS_OK(status)) {
 356                 printf("dump FAILED\n");
 357                 exit(1);
 358         }
 359
 360         if (validate) {
 361                 DATA_BLOB v_blob;
 362                 struct ndr_push *ndr_v_push;
 363                 struct ndr_pull *ndr_v_pull;
 364                 struct ndr_print *ndr_v_print;
 365                 uint32_t i;
 366                 uint8_t byte_a, byte_b;
 367                 bool differ;
 368
 369                 ndr_v_push = ndr_push_init_ctx(mem_ctx);
 370
 371                 status = f->ndr_push(ndr_v_push, flags, st);
 372                 if (!NT_STATUS_IS_OK(status)) {
 373                         printf("validate push FAILED\n");
 374                         exit(1);
 375                 }
 376
 377                 v_blob = ndr_push_blob(ndr_v_push);
 378
 379                 if (dumpdata) {
 380                         printf("%ld bytes generated (validate)\n", (long)v_blob.length);
 381                         dump_data(0, v_blob.data, v_blob.length);
 382                 }
 383
 384                 ndr_v_pull = ndr_pull_init_blob(&v_blob, mem_ctx);
 385                 ndr_v_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 386
 387                 status = f->ndr_pull(ndr_v_pull, flags, v_st);
 388                 if (!NT_STATUS_IS_OK(status)) {
 389                         printf("validate pull FAILED\n");
 390                         exit(1);
 391                 }
 392
 393                 printf("pull returned %s\n", nt_errstr(status));
 394
 395                 if (ndr_v_pull->offset != ndr_v_pull->data_size) {
 396                         printf("WARNING! %d unread bytes in validation\n", ndr_v_pull->data_size - ndr_v_pull->offset);
 397                         dump_data(0, ndr_v_pull->data+ndr_v_pull->offset, ndr_v_pull->data_size - ndr_v_pull->offset);
 398                 }
 399
 400                 ndr_v_print = talloc_zero(mem_ctx, struct ndr_print);
 401                 ndr_v_print->print = ndr_print_debug_helper;
 402                 ndr_v_print->depth = 1;
 403                 f->ndr_print(ndr_v_print, function, flags, v_st);
 404
 405                 if (blob.length != v_blob.length) {
 406                         printf("WARNING! orig bytes:%u validated pushed "
 407                                "bytes:%u\n", (unsigned int)blob.length,
 408                                (unsigned int)v_blob.length);
 409                 }
 410
 411                 if (ndr_pull->offset != ndr_v_pull->offset) {
 412                         printf("WARNING! orig pulled bytes:%u validated pulled bytes:%u\n", ndr_pull->offset, ndr_v_pull->offset);
 413                 }
 414
 415                 differ = false;
 416                 byte_a = 0x00;
 417                 byte_b = 0x00;
 418                 for (i=0; i < blob.length; i++) {
 419                         byte_a = blob.data[i];
 420
 421                         if (i == v_blob.length) {
 422                                 byte_b = 0x00;
 423                                 differ = true;
 424                                 break;
 425                         }
 426
 427                         byte_b = v_blob.data[i];
 428
 429                         if (byte_a != byte_b) {
 430                                 differ = true;
 431                                 break;
 432                         }
 433                 }
 434                 if (differ) {
 435                         printf("WARNING! orig and validated differ at byte 0x%02X (%u)\n", i, i);
 436                         printf("WARNING! orig byte[0x%02X] = 0x%02X validated byte[0x%02X] = 0x%02X\n",
 437                                 i, byte_a, i, byte_b);
 438                 }
 439         }
 440
 441         printf("dump OK\n");
 442
 443         talloc_free(mem_ctx);
 444
 445         poptFreeContext(pc);
 446
 447         return 0;
 448 }