crc32.h

UNIX、linux密码的破密程序源代码实现

/*
 * This is a tiny implementation of CRC-32.
 *
 * Written by Solar Designer <solar at openwall.com> in 1998, revised in
 * 2005 for use in John the Ripper, and placed in the public domain.
 * There's absolutely no warranty.
 */

#ifndef _JOHN_CRC32_H
#define _JOHN_CRC32_H

typedef unsigned int CRC32_t;

/*
 * When called for the first time, allocates memory for and initializes
 * the internal table.  Always initializes the CRC-32 value to all 1's.
 */
extern void CRC32_Init(CRC32_t *value);

/*
 * Updates the current CRC-32 value with the supplied data block.
 */
extern void CRC32_Update(CRC32_t *value, void *data, unsigned int size);

/*
 * Finalizes the CRC-32 value by inverting all bits and saving it as
 * little-endian.
 */
extern void CRC32_Final(unsigned char *out, CRC32_t value);

#endif