/* crypto/bf/blowfish.h */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#ifndef HEADER_BLOWFISH_H

#define HEADER_BLOWFISH_H

#include <openssl/e_os2.h>

#ifdef  __cplusplus

extern "C" {

#endif

#ifdef OPENSSL_NO_BF

#error BF is disabled.

#endif

#define BF_ENCRYPT	1

#define BF_DECRYPT	0

/*

 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 * ! BF_LONG has to be at least 32 bits wide. If it's wider, then !

 * ! BF_LONG_LOG2 has to be defined along.                        !

 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 */

#if defined(OPENSSL_SYS_WIN16) || defined(__LP32__)

#define BF_LONG unsigned long

#elif defined(OPENSSL_SYS_CRAY) || defined(__ILP64__)

#define BF_LONG unsigned long

#define BF_LONG_LOG2 3

/*

 * _CRAY note. I could declare short, but I have no idea what impact

 * does it have on performance on none-T3E machines. I could declare

 * int, but at least on C90 sizeof(int) can be chosen at compile time.

 * So I've chosen long...

 *					<appro@fy.chalmers.se>

 */

#else

#define BF_LONG unsigned int

#endif

#define BF_ROUNDS	16

#define BF_BLOCK	8

typedef struct bf_key_st

	{

	BF_LONG P[BF_ROUNDS+2];

	BF_LONG S[4*256];

	} BF_KEY;

void BF_set_key(BF_KEY *key, int len, const unsigned char *data);

void BF_encrypt(BF_LONG *data,const BF_KEY *key);

void BF_decrypt(BF_LONG *data,const BF_KEY *key);

void BF_ecb_encrypt(const unsigned char *in, unsigned char *out,

	const BF_KEY *key, int enc);

void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,

	const BF_KEY *schedule, unsigned char *ivec, int enc);

void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,

	const BF_KEY *schedule, unsigned char *ivec, int *num, int enc);

void BF_ofb64_encrypt(const unsigned char *in, unsigned char *out, long length,

	const BF_KEY *schedule, unsigned char *ivec, int *num);

const char *BF_options(void);

#ifdef  __cplusplus

}

#endif

#endif