tc/tc.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3
   4 #include "pbkdf2.h"
   5 #include "crypt.h"
   6 // #include "hash_wrappers.h"
   7 // #include "hmac.h"
   8
   9 #define VERSION 0.1
  10
  11 #define TC_HIDDEN_VOLUME_OFFSET 1536
  12 #define TC_SALT_SZ 64
  13 #define TC_HEADER_SZ 448
  14
  15 char * name;
  16
  17 void usage() {
  18         fprintf(stderr,"trueCRACK v%f\m",VERSION);
  19         fprintf(stderr,"usage:\n\t%s tc_volume wordlist starting_word",name);
  20         exit(EXIT_FAILURE);
  21 }
  22
  23 int main (int argc, char ** argv) {
  24         name = argv[0];
  25         if (argc<4)
  26                 usage();
  27
  28         FILE * tc_volume_file = fopen(argv[1], "rb");
  29         FILE * wordlist_file  = fopen(argv[2], "r" );
  30
  31         uint8_t salt            [TC_SALT_SZ+4];
  32         uint8_t header          [TC_HEADER_SZ];
  33         #ifdef TC_HIDDEN
  34         uint8_t header_hidden   [TC_HEADER_SZ];
  35         #endif
  36
  37         size_t s = fread(tc_volume_file,1,TC_SALT_SZ,salt);
  38         if (s < TC_SALT_SZ) {
  39                 printf("[%s:%d] volume salt read failed");
  40                 exit(EXIT_FAILURE);
  41         }
  42
  43         s = fread(tc_volume_file,1,TC_HEADER_SZ,header);
  44         if (s < TC_HEADER_SZ) {
  45                 exit(EXIT_FAILURE);
  46         }
  47
  48         #ifdef TC_HIDDEN
  49         fseek ( tc_volume_file , TC_HIDDEN_VOLUME_OFFSET , SEEK_SET );
  50         s = fread(tc_volume_file,1,TC_HEADER_SZ,header_hidden);
  51         if (s < TC_HEADER_SZ) {
  52                 exit(EXIT_FAILURE);
  53         }
  54         #endif
  55
  56         fclose(tc_volume_file);
  57
  58         char password [TC_PASSWORD_MAX];
  59         uint8_t dec_buff[TC_HEADER_SZ];
  60
  61         //TODO: seek to starting_word
  62         // check words until worklist ends.
  63         while ( !feof(wordlist_file) ) {
  64
  65                 //read line??
  66                 read_line(wordlist_file, password);
  67                 PBKDF2(hmac_ctx, password, sizeof(password), salt, sizeof(salt), iterations, derived_key, derived_key_len);
  68
  69                 decrypt(enc_ctx, derived_key, derived_key_len, header, TC_HEADER_SZ, dec_buff, TC_HEADER_SZ);
  70                 bool valid_pass =  check_tc_header(dec_buff);
  71
  72                 #ifdef TC_HIDDEN
  73                 decrypt(enc_ctx, derived_key, derived_key_len, header_hidden, TC_HEADER_SZ, dec_buff, TC_HEADER_SZ);
  74                 valid_pass |= check_tc_header(dec_buff);
  75                 #endif
  76
  77                 if (valid_pass) {
  78                         printf("possible password: %s\n",(char *)password);
  79                 }
  80         }
  81
  82         exit(EXIT_SUCCESS);
  83 }