/* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */

/*

 * Blowfish - a fast block cipher designed by Bruce Schneier

 *

 * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>

 * All rights reserved.

 *

 * 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 above 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 software developed by Niels Provos.

 * 4. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.

 */

#ifndef _BLF_H_

#define _BLF_H_

//#include "includes.h"

#if !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H)

/* Schneier specifies a maximum key length of 56 bytes.

 * This ensures that every key bit affects every cipher

 * bit.  However, the subkeys can hold up to 72 bytes.

 * Warning: For normal blowfish encryption only 56 bytes

 * of the key affect all cipherbits.

 */

#define BLF_N	16			/* Number of Subkeys */

#define BLF_MAXKEYLEN ((BLF_N-2)*4)	/* 448 bits */

#define BLF_MAXUTILIZED ((BLF_N+2)*4)	/* 576 bits */

/* Blowfish context */

typedef struct BlowfishContext {

	uint32_t S[4][256];	/* S-Boxes */

	uint32_t P[BLF_N + 2];	/* Subkeys */

} ssh_blf_ctx;

/* Raw access to customized Blowfish

 *	blf_key is just:

 *	Blowfish_initstate( state )

 *	Blowfish_expand0state( state, key, keylen )

 */

void Blowfish_encipher(ssh_blf_ctx *, uint32_t *, uint32_t *);

void Blowfish_decipher(ssh_blf_ctx *, uint32_t *, uint32_t *);

void Blowfish_initstate(ssh_blf_ctx *);

void Blowfish_expand0state(ssh_blf_ctx *, const uint8_t *, uint16_t);

void Blowfish_expandstate

(ssh_blf_ctx *, const uint8_t *, uint16_t, const uint8_t *, uint16_t);

/* Standard Blowfish */

void ssh_blf_key(ssh_blf_ctx *, const uint8_t *, uint16_t);

void ssh_blf_enc(ssh_blf_ctx *, uint32_t *, uint16_t);

void ssh_blf_dec(ssh_blf_ctx *, uint32_t *, uint16_t);

void ssh_blf_ecb_encrypt(ssh_blf_ctx *, uint8_t *, uint32_t);

void ssh_blf_ecb_decrypt(ssh_blf_ctx *, uint8_t *, uint32_t);

void ssh_blf_cbc_encrypt(ssh_blf_ctx *, uint8_t *, uint8_t *, uint32_t);

void ssh_blf_cbc_decrypt(ssh_blf_ctx *, uint8_t *, uint8_t *, uint32_t);

/* Converts uint8_t to uint32_t */

uint32_t Blowfish_stream2word(const uint8_t *, uint16_t , uint16_t *);

#endif /* !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) */

#endif /* _BLF_H */