main.cpp

TWOFISH加密算法

#include "stdio.h"
#include "twofish.h"
#include "string.h"

   TWOFISH_context ctx; /* Expanded key. */
   byte scratch[16];	/* Encryption/decryption result buffer. */

   /* Test vectors for single encryption/decryption.  Note that I am using
    * the vectors from the Twofish paper's "known answer test", I=3 for
    * 128-bit and I=4 for 256-bit, instead of the all-0 vectors from the
    * "intermediate value test", because an all-0 key would trigger all the
    * special cases in the RS matrix multiply, leaving the math untested. */
   static const byte plaintext[16] = {
      0xD4, 0x91, 0xDB, 0x16, 0xE7, 0xB1, 0xC3, 0x9E,
      0x86, 0xCB, 0x08, 0x6B, 0x78, 0x9F, 0x54, 0x19
   };
   static const byte key[16] = {
      0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32,
      0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A
   };
   static const byte ciphertext[16] = {
      0x01, 0x9F, 0x98, 0x09, 0xDE, 0x17, 0x11, 0x85,
      0x8F, 0xAA, 0xC3, 0xA3, 0xBA, 0x20, 0xFB, 0xC3
   };
   static const byte plaintext_256[16] = {
      0x90, 0xAF, 0xE9, 0x1B, 0xB2, 0x88, 0x54, 0x4F,
      0x2C, 0x32, 0xDC, 0x23, 0x9B, 0x26, 0x35, 0xE6
   };
   static const byte key_256[32] = {
      0xD4, 0x3B, 0xB7, 0x55, 0x6E, 0xA3, 0x2E, 0x46,
      0xF2, 0xA2, 0x82, 0xB7, 0xD4, 0x5B, 0x4E, 0x0D,
      0x57, 0xFF, 0x73, 0x9D, 0x4D, 0xC9, 0x2C, 0x1B,
      0xD7, 0xFC, 0x01, 0x70, 0x0C, 0xC8, 0x21, 0x6F
   };
   static const byte ciphertext_256[16] = {
      0x6C, 0xB4, 0x56, 0x1C, 0x40, 0xBF, 0x0A, 0x97,
      0x05, 0x93, 0x1C, 0xB6, 0xD4, 0x08, 0xE7, 0xFA
   };

int main()
{

   twofish_setkey (&ctx, key, sizeof(key));
   twofish_encrypt (&ctx, scratch, plaintext);
   if (memcmp (scratch, ciphertext, sizeof (ciphertext)))
     printf( "Twofish-128 test encryption failed.\n");
   twofish_decrypt (&ctx, scratch, scratch);
   if (memcmp (scratch, plaintext, sizeof (plaintext)))
     printf( "Twofish-128 test decryption failed.\n");

   twofish_setkey (&ctx, key_256, sizeof(key_256));
   twofish_encrypt (&ctx, scratch, plaintext_256);
   if (memcmp (scratch, ciphertext_256, sizeof (ciphertext_256)))
     printf( "Twofish-256 test encryption failed.\n");
   twofish_decrypt (&ctx, scratch, scratch);
   if (memcmp (scratch, plaintext_256, sizeof (plaintext_256)))
     printf( "Twofish-256 test decryption failed.\n");

   return 0;
}