git.zerfleddert.de Git - proxmark3-svn/blob - common/polarssl/libpcrypto.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2018 Merlok
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // crypto commands
   9 //-----------------------------------------------------------------------------
  10
  11 #include "polarssl/libpcrypto.h"
  12 #include <polarssl/aes.h>
  13
  14 int aes_encode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length){
  15         uint8_t iiv[16] = {0};
  16         if (iv)
  17                 memcpy(iiv, iv, 16);
  18
  19         aes_context aes;
  20         aes_init(&aes);
  21         if (aes_setkey_enc(&aes, key, 128))
  22                 return 1;
  23         if (aes_crypt_cbc(&aes, AES_ENCRYPT, length, iiv, input, output))
  24                 return 2;
  25         aes_free(&aes);
  26
  27         return 0;
  28 }
  29
  30 int aes_decode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length){
  31         uint8_t iiv[16] = {0};
  32         if (iv)
  33                 memcpy(iiv, iv, 16);
  34
  35         aes_context aes;
  36         aes_init(&aes);
  37         if (aes_setkey_dec(&aes, key, 128))
  38                 return 1;
  39         if (aes_crypt_cbc(&aes, AES_DECRYPT, length, iiv, input, output))
  40                 return 2;
  41         aes_free(&aes);
  42
  43         return 0;
  44 }