source4/utils/ndrdump.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB torture tester
   4    Copyright (C) Andrew Tridgell 2003
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22 #include "lib/cmdline/popt_common.h"
  23 #include "system/filesys.h"
  24 #include "system/locale.h"
  25 #include "librpc/rpc/dcerpc.h"
  26 #include "librpc/rpc/dcerpc_table.h"
  27
  28 static const struct dcerpc_interface_call *find_function(
  29         const struct dcerpc_interface_table *p,
  30         const char *function)
  31 {
  32         int i;
  33         if (isdigit(function[0])) {
  34                 i = strtol(function, NULL, 0);
  35                 return &p->calls[i];
  36         }
  37         for (i=0;i<p->num_calls;i++) {
  38                 if (strcmp(p->calls[i].name, function) == 0) {
  39                         break;
  40                 }
  41         }
  42         if (i == p->num_calls) {
  43                 printf("Function '%s' not found\n", function);
  44                 exit(1);
  45         }
  46         return &p->calls[i];
  47 }
  48
  49
  50 static void show_pipes(void)
  51 {
  52         const struct dcerpc_interface_list *l;
  53         printf("\nYou must specify a pipe\n");
  54         printf("known pipes are:\n");
  55         for (l=librpc_dcerpc_pipes();l;l=l->next) {
  56                 if(l->table->helpstring) {
  57                         printf("\t%s - %s\n", l->table->name, l->table->helpstring);
  58                 } else {
  59                         printf("\t%s\n", l->table->name);
  60                 }
  61         }
  62         exit(1);
  63 }
  64
  65 static void show_functions(const struct dcerpc_interface_table *p)
  66 {
  67         int i;
  68         printf("\nYou must specify a function\n");
  69         printf("known functions on '%s' are:\n", p->name);
  70         for (i=0;i<p->num_calls;i++) {
  71                 printf("\t0x%02x (%2d) %s\n", i, i, p->calls[i].name);
  72         }
  73         exit(1);
  74 }
  75
  76 static char *stdin_load(TALLOC_CTX *mem_ctx, size_t *size)
  77 {
  78         int num_read, total_len = 0;
  79         char buf[255];
  80         char *result = NULL;
  81
  82         while((num_read = read(STDIN_FILENO, buf, 255)) > 0) {
  83
  84                 if (result) {
  85                         result = (char *) talloc_realloc(
  86                                 mem_ctx, result, char *, total_len + num_read);
  87                 } else {
  88                         result = talloc_size(mem_ctx, num_read);
  89                 }
  90
  91                 memcpy(result + total_len, buf, num_read);
  92
  93                 total_len += num_read;
  94         }
  95
  96         if (size)
  97                 *size = total_len;
  98
  99         return result;
 100 }
 101
 102 const struct dcerpc_interface_table *load_iface_from_plugin(const char *plugin, const char *pipe_name)
 103 {
 104         const struct dcerpc_interface_table *p;
 105         void *handle;
 106         char *symbol;
 107
 108         handle = dlopen(plugin, RTLD_NOW);
 109         if (handle == NULL) {
 110                 printf("%s: Unable to open: %s\n", plugin, dlerror());
 111                 return NULL;
 112         }
 113
 114         symbol = talloc_asprintf(NULL, "dcerpc_table_%s", pipe_name);
 115         p = dlsym(handle, symbol);
 116
 117         if (!p) {
 118                 printf("%s: Unable to find DCE/RPC interface table for '%s': %s\n", plugin, pipe_name, dlerror());
 119                 talloc_free(symbol);
 120                 return NULL;
 121         }
 122
 123         talloc_free(symbol);
 124
 125         return p;
 126 }
 127
 128  int main(int argc, const char *argv[])
 129 {
 130         const struct dcerpc_interface_table *p = NULL;
 131         const struct dcerpc_interface_call *f;
 132         const char *pipe_name, *function, *inout, *filename;
 133         uint8_t *data;
 134         size_t size;
 135         DATA_BLOB blob;
 136         struct ndr_pull *ndr_pull;
 137         struct ndr_print *ndr_print;
 138         TALLOC_CTX *mem_ctx;
 139         int flags;
 140         poptContext pc;
 141         NTSTATUS status;
 142         void *st;
 143         void *v_st;
 144         const char *ctx_filename = NULL;
 145         const char *plugin = NULL;
 146         BOOL validate = False;
 147         BOOL dumpdata = False;
 148         int opt;
 149         struct poptOption long_options[] = {
 150                 {"context-file", 'c', POPT_ARG_STRING, &ctx_filename, 0, "In-filename to parse first", "CTX-FILE" },
 151                 {"validate", 0, POPT_ARG_NONE, &validate, 0, "try to validate the data", NULL },
 152                 {"dump-data", 0, POPT_ARG_NONE, &dumpdata, 0, "dump the hex data", NULL },
 153                 {"load-dso", 'l', POPT_ARG_STRING, &plugin, 0, "load from shared object file", NULL },
 154                 POPT_COMMON_SAMBA
 155                 POPT_AUTOHELP
 156                 POPT_TABLEEND
 157         };
 158
 159         dcerpc_table_init();
 160
 161         pc = poptGetContext("ndrdump", argc, argv, long_options, 0);
 162
 163         poptSetOtherOptionHelp(
 164                 pc, "<pipe|uuid> <function> <inout> [<filename>]");
 165
 166         while ((opt = poptGetNextOpt(pc)) != -1) {
 167         }
 168
 169         pipe_name = poptGetArg(pc);
 170
 171         if (!pipe_name) {
 172                 poptPrintUsage(pc, stderr, 0);
 173                 show_pipes();
 174                 exit(1);
 175         }
 176
 177         if (plugin != NULL) {
 178                 p = load_iface_from_plugin(plugin, pipe_name);
 179         }
 180
 181         if (!p) {
 182                 p = idl_iface_by_name(pipe_name);
 183         }
 184
 185         if (!p) {
 186                 struct GUID uuid;
 187
 188                 status = GUID_from_string(pipe_name, &uuid);
 189
 190                 if (NT_STATUS_IS_OK(status)) {
 191                         p = idl_iface_by_uuid(&uuid);
 192                 }
 193         }
 194
 195         if (!p) {
 196                 printf("Unknown pipe or UUID '%s'\n", pipe_name);
 197                 exit(1);
 198         }
 199
 200         function = poptGetArg(pc);
 201         inout = poptGetArg(pc);
 202         filename = poptGetArg(pc);
 203
 204         if (!function || !inout) {
 205                 poptPrintUsage(pc, stderr, 0);
 206                 show_functions(p);
 207                 exit(1);
 208         }
 209
 210         if (strcmp(inout, "in") == 0 ||
 211             strcmp(inout, "request") == 0) {
 212                 flags = NDR_IN;
 213         } else if (strcmp(inout, "out") == 0 ||
 214                    strcmp(inout, "response") == 0) {
 215                 flags = NDR_OUT;
 216         } else {
 217                 printf("Bad inout value '%s'\n", inout);
 218                 exit(1);
 219         }
 220
 221         f = find_function(p, function);
 222
 223         mem_ctx = talloc_init("ndrdump");
 224
 225         st = talloc_zero_size(mem_ctx, f->struct_size);
 226         if (!st) {
 227                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 228                 exit(1);
 229         }
 230
 231         v_st = talloc_zero_size(mem_ctx, f->struct_size);
 232         if (!v_st) {
 233                 printf("Unable to allocate %d bytes\n", (int)f->struct_size);
 234                 exit(1);
 235         }
 236
 237         if (ctx_filename) {
 238                 if (flags == NDR_IN) {
 239                         printf("Context file can only be used for \"out\" packages\n");
 240                         exit(1);
 241                 }
 242
 243                 data = (uint8_t *)file_load(ctx_filename, &size, mem_ctx);
 244                 if (!data) {
 245                         perror(ctx_filename);
 246                         exit(1);
 247                 }
 248
 249                 blob.data = data;
 250                 blob.length = size;
 251
 252                 ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 253                 ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 254
 255                 status = f->ndr_pull(ndr_pull, NDR_IN, st);
 256
 257                 if (ndr_pull->offset != ndr_pull->data_size) {
 258                         printf("WARNING! %d unread bytes while parsing context file\n", ndr_pull->data_size - ndr_pull->offset);
 259                 }
 260
 261                 if (!NT_STATUS_IS_OK(status)) {
 262                         printf("pull for context file returned %s\n", nt_errstr(status));
 263                         exit(1);
 264                 }
 265                 memcpy(v_st, st, f->struct_size);
 266         }
 267
 268         if (filename)
 269                 data = (uint8_t *)file_load(filename, &size, mem_ctx);
 270         else
 271                 data = (uint8_t *)stdin_load(mem_ctx, &size);
 272
 273         if (!data) {
 274                 if (filename)
 275                         perror(filename);
 276                 else
 277                         perror("stdin");
 278                 exit(1);
 279         }
 280
 281         blob.data = data;
 282         blob.length = size;
 283
 284         ndr_pull = ndr_pull_init_blob(&blob, mem_ctx);
 285         ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 286
 287         status = f->ndr_pull(ndr_pull, flags, st);
 288
 289         printf("pull returned %s\n", nt_errstr(status));
 290
 291         if (ndr_pull->offset != ndr_pull->data_size) {
 292                 printf("WARNING! %d unread bytes\n", ndr_pull->data_size - ndr_pull->offset);
 293                 dump_data(0, ndr_pull->data+ndr_pull->offset, ndr_pull->data_size - ndr_pull->offset);
 294         }
 295
 296         if (dumpdata) {
 297                 printf("%d bytes consumed\n", ndr_pull->offset);
 298                 dump_data(0, blob.data, blob.length);
 299         }
 300
 301         ndr_print = talloc_zero(mem_ctx, struct ndr_print);
 302         ndr_print->print = ndr_print_debug_helper;
 303         ndr_print->depth = 1;
 304         f->ndr_print(ndr_print, function, flags, st);
 305
 306         if (!NT_STATUS_IS_OK(status)) {
 307                 printf("dump FAILED\n");
 308                 exit(1);
 309         }
 310
 311         if (validate) {
 312                 DATA_BLOB v_blob;
 313                 struct ndr_push *ndr_v_push;
 314                 struct ndr_pull *ndr_v_pull;
 315                 struct ndr_print *ndr_v_print;
 316
 317                 ndr_v_push = ndr_push_init_ctx(mem_ctx);
 318
 319                 status = f->ndr_push(ndr_v_push, flags, st);
 320                 if (!NT_STATUS_IS_OK(status)) {
 321                         printf("validate push FAILED\n");
 322                         exit(1);
 323                 }
 324
 325                 v_blob = ndr_push_blob(ndr_v_push);
 326
 327                 if (dumpdata) {
 328                         printf("%ld bytes generated (validate)\n", (long)v_blob.length);
 329                         dump_data(0, v_blob.data, v_blob.length);
 330                 }
 331
 332                 ndr_v_pull = ndr_pull_init_blob(&v_blob, mem_ctx);
 333                 ndr_v_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 334
 335                 status = f->ndr_pull(ndr_v_pull, flags, v_st);
 336                 if (!NT_STATUS_IS_OK(status)) {
 337                         printf("validate pull FAILED\n");
 338                         exit(1);
 339                 }
 340
 341                 printf("pull returned %s\n", nt_errstr(status));
 342
 343                 if (ndr_v_pull->offset != ndr_v_pull->data_size) {
 344                         printf("WARNING! %d unread bytes in validation\n", ndr_v_pull->data_size - ndr_v_pull->offset);
 345                         dump_data(0, ndr_v_pull->data+ndr_v_pull->offset, ndr_v_pull->data_size - ndr_v_pull->offset);
 346                 }
 347
 348                 ndr_v_print = talloc_zero(mem_ctx, struct ndr_print);
 349                 ndr_v_print->print = ndr_print_debug_helper;
 350                 ndr_v_print->depth = 1;
 351                 f->ndr_print(ndr_v_print, function, flags, v_st);
 352
 353                 if (blob.length != v_blob.length) {
 354                         printf("WARNING! orig bytes:%ld validated pushed bytes:%ld\n", (long)blob.length, (long)v_blob.length);
 355                 }
 356
 357                 if (ndr_pull->offset != ndr_v_pull->offset) {
 358                         printf("WARNING! orig pulled bytes:%d validated pulled bytes:%d\n", ndr_pull->offset, ndr_v_pull->offset);
 359                 }
 360         }
 361
 362         printf("dump OK\n");
 363
 364         talloc_free(mem_ctx);
 365
 366         poptFreeContext(pc);
 367
 368         return 0;
 369 }