view libtomcrypt/src/modes/f8/f8_test_mode.c @ 994:5c5ade336926

Prefer stronger algorithms in algorithm negotiation. Prefer diffie-hellman-group14-sha1 (2048 bit) over diffie-hellman-group1-sha1 (1024 bit). Due to meet-in-the-middle attacks the effective key length of three key 3DES is 112 bits. AES is stronger and faster then 3DES. Prefer to delay the start of compression until after authentication has completed. This avoids exposing compression code to attacks from unauthenticated users. (github pull request #9)
author Fedor Brunner <fedor.brunner@azet.sk>
date Fri, 23 Jan 2015 23:00:25 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
line wrap: on
line source

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, [email protected], http://libtomcrypt.com
 */
#include "tomcrypt.h"

/**
   @file f8_test_mode.c
   F8 implementation, test, Tom St Denis
*/


#ifdef LTC_F8_MODE

int f8_test_mode(void)
{
#ifndef LTC_TEST
   return CRYPT_NOP;
#else
   static const unsigned char key[16] = { 0x23, 0x48, 0x29, 0x00, 0x84, 0x67, 0xbe, 0x18, 
                                          0x6c, 0x3d, 0xe1, 0x4a, 0xae, 0x72, 0xd6, 0x2c };
   static const unsigned char salt[4] = { 0x32, 0xf2, 0x87, 0x0d };
   static const unsigned char IV[16]  = { 0x00, 0x6e, 0x5c, 0xba, 0x50, 0x68, 0x1d, 0xe5, 
                                          0x5c, 0x62, 0x15, 0x99, 0xd4, 0x62, 0x56, 0x4a };
   static const unsigned char pt[39]  = { 0x70, 0x73, 0x65, 0x75, 0x64, 0x6f, 0x72, 0x61, 
                                          0x6e, 0x64, 0x6f, 0x6d, 0x6e, 0x65, 0x73, 0x73,
                                          0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 
                                          0x6e, 0x65, 0x78, 0x74, 0x20, 0x62, 0x65, 0x73,
                                          0x74, 0x20, 0x74, 0x68, 0x69, 0x6e, 0x67       };
   static const unsigned char ct[39]  = { 0x01, 0x9c, 0xe7, 0xa2, 0x6e, 0x78, 0x54, 0x01, 
                                          0x4a, 0x63, 0x66, 0xaa, 0x95, 0xd4, 0xee, 0xfd,
                                          0x1a, 0xd4, 0x17, 0x2a, 0x14, 0xf9, 0xfa, 0xf4, 
                                          0x55, 0xb7, 0xf1, 0xd4, 0xb6, 0x2b, 0xd0, 0x8f,
                                          0x56, 0x2c, 0x0e, 0xef, 0x7c, 0x48, 0x02       };
   unsigned char buf[39];
   symmetric_F8  f8;
   int           err, idx;
   
   idx = find_cipher("aes");
   if (idx == -1) {
      idx = find_cipher("rijndael");
      if (idx == -1) return CRYPT_NOP;
   }      
   
   /* initialize the context */
   if ((err = f8_start(idx, IV, key, sizeof(key), salt, sizeof(salt), 0, &f8)) != CRYPT_OK) {
      return err;
   }
   
   /* encrypt block */
   if ((err = f8_encrypt(pt, buf, sizeof(pt), &f8)) != CRYPT_OK) {
      f8_done(&f8);
      return err;
   }
   f8_done(&f8);

   /* compare */
   if (XMEMCMP(buf, ct, sizeof(ct))) {
      return CRYPT_FAIL_TESTVECTOR;
   }      
   
   return CRYPT_OK;
#endif   
}   

#endif

/* $Source: /cvs/libtom/libtomcrypt/src/modes/f8/f8_test_mode.c,v $ */
/* $Revision: 1.3 $ */
/* $Date: 2006/11/13 11:55:25 $ */