lib/fuzzing/fuzz_ldb_parse_binary_decode.c

   1 /*
   2    Fuzzing ldb_binary_decode and ldb_binary_encode_string
   3    Copyright (C) Catalyst IT 2020
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18 #include "includes.h"
  19 #include "fuzzing/fuzzing.h"
  20 #include "ldb_private.h"
  21
  22
  23 #define MAX_LENGTH (2 * 1024 * 1024 - 1)
  24 char buf[MAX_LENGTH + 1] = {0};
  25
  26 static char * possibly_truncate(uint8_t *input, size_t len)
  27 {
  28         if (len > MAX_LENGTH) {
  29                 len = MAX_LENGTH;
  30         }
  31         memcpy(buf, input, len);
  32         buf[len] = 0;
  33         return buf;
  34 }
  35
  36
  37 int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
  38 {
  39         TALLOC_CTX *mem_ctx = talloc_init(__FUNCTION__);
  40         struct ldb_val val = {0};
  41         const char *s = possibly_truncate(input, len);
  42
  43         /* we treat the same string to encoding and decoding, not
  44          * round-tripping. */
  45         val = ldb_binary_decode(mem_ctx, s);
  46         ldb_binary_encode_string(mem_ctx, s);
  47         TALLOC_FREE(mem_ctx);
  48         return 0;
  49 }
  50
  51
  52 int LLVMFuzzerInitialize(int *argc, char ***argv)
  53 {
  54         return 0;
  55 }