SecurityTests/cspxutils/aesVect/enDecryptTest.c

   1 #include "enDecrypt.h"
   2 #include "std_defs.h"
   3 #include <strings.h>
   4 #include <stdio.h>
   5
   6 /*
   7  * encrypt/decrypt using Gladman version of AES.
   8  */
   9
  10 CSSM_RETURN encryptDecryptTest(
  11         CSSM_BOOL                       forEncrypt,
  12         uint32                          keySizeInBits,
  13         uint32                          blockSizeInBits,
  14         const uint8                     *key,                           // raw key bytes
  15         const uint8                     *inText,
  16         uint32                          inTextLen,
  17         uint8                           *outText)
  18 {
  19         u4byte                  aesKey[8];
  20         uint8                   *inPtr = (uint8 *)inText;
  21         uint8                   *outPtr = outText;
  22         uint32                  blockSizeInBytes = blockSizeInBits / 8;
  23         uint32                  blocks = inTextLen / blockSizeInBytes;
  24
  25         if(blockSizeInBits != 128) {
  26                 printf("***This AES implementation supports only 128 bit blocks.\n");
  27                 return CSSM_ERRCODE_INTERNAL_ERROR;
  28         }
  29         memmove(aesKey, key, keySizeInBits / 8);
  30         set_key(aesKey, keySizeInBits);
  31         for( ; blocks > 0; blocks--) {
  32                 if(forEncrypt) {
  33                         rEncrypt((u4byte *)inPtr, (u4byte *)outPtr);
  34                 }
  35                 else {
  36                         rDecrypt((u4byte *)inPtr, (u4byte *)outPtr);
  37                 }
  38                 inPtr += blockSizeInBytes;
  39                 outPtr += blockSizeInBytes;
  40         }
  41         return CSSM_OK;
  42 }