Keeloq 编解码测试

参考资料：

http://en.wikipedia.org/wiki/KeeLoq

http://cryptolib.com/ciphers/keeloq/

测试程序：

#include <stdio.h>

#include <stdlib.h>


typedef unsigned long u32;
typedef unsigned long long u64;


/*\
 *  Corrected KeeLoq Encryption and Decryption functions by Ruptor.
 *  Use at your own risk! This source is not copyrighted.
 *  Encoder encrypts an all-0 block, decoder decrypts it.
 *  KeeLoq cipher encrypts 32-bit blocks with 64-bit keys.
 *  Key is XORed with a 32-bit IV incremented on each use.
 *  See http://www.keeloq.boom.ru/decryption.pdf for more details.
 *  KeeLoq algorithm itself is not patented.
\*/


#d