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/*
* DES
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/

#include <botan/desx.h>
#include <botan/xor_buf.h>

namespace Botan {

/*
* DESX Encryption
*/
void DESX::enc(const byte in[], byte out[]) const
   {
   xor_buf(out, in, K1.begin(), BLOCK_SIZE);
   des.encrypt(out);
   xor_buf(out, K2.begin(), BLOCK_SIZE);
   }

/*
* DESX Decryption
*/
void DESX::dec(const byte in[], byte out[]) const
   {
   xor_buf(out, in, K2.begin(), BLOCK_SIZE);
   des.decrypt(out);
   xor_buf(out, K1.begin(), BLOCK_SIZE);
   }

/*
* DESX Key Schedule
*/
void DESX::key_schedule(const byte key[], u32bit)
   {
   K1.copy(key, 8);
   des.set_key(key + 8, 8);
   K2.copy(key + 16, 8);
   }

}