/* $OpenBSD: bf_enc.c,v 1.6 2014/10/28 07:35:58 jsg Exp $ */

/* 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.]

 */

#include <openssl/blowfish.h>

#include "bf_locl.h"

/* Blowfish as implemented from 'Blowfish: Springer-Verlag paper'

 * (From LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION,

 * CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)

 */

#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)

#error If you set BF_ROUNDS to some value other than 16 or 20, you will have \

to modify the code.

#endif

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

	{

#ifndef BF_PTR2

	BF_LONG l,r;

	const BF_LONG *p,*s;

#if BF_ROUNDS == 20

	BF_ENC(r,l,s,p[17]);

	BF_ENC(l,r,s,p[18]);

	BF_ENC(r,l,s,p[19]);

	BF_ENC(l,r,s,p[20]);

#endif

#else

	BF_LONG l,r,t,*k;

	l=data[0];

	r=data[1];

	k=(BF_LONG*)key;

	l^=k[0];

	BF_ENC(r,l,k, 1);

	BF_ENC(l,r,k, 2);

	BF_ENC(r,l,k, 3);

	BF_ENC(l,r,k, 4);

	BF_ENC(r,l,k, 5);

	BF_ENC(l,r,k, 6);

	BF_ENC(r,l,k, 7);

	BF_ENC(l,r,k, 8);

	BF_ENC(r,l,k, 9);

	BF_ENC(l,r,k,10);

	BF_ENC(r,l,k,11);

	BF_ENC(l,r,k,12);

	BF_ENC(r,l,k,13);

	BF_ENC(l,r,k,14);

	BF_ENC(r,l,k,15);

	BF_ENC(l,r,k,16);

#if BF_ROUNDS == 20

	BF_ENC(r,l,k,17);

	BF_ENC(l,r,k,18);

	BF_ENC(r,l,k,19);

	BF_ENC(l,r,k,20);

#endif

	r^=k[BF_ROUNDS+1];

	data[1]=l&0xffffffffL;

	data[0]=r&0xffffffffL;

#endif

#ifndef BF_DEFAULT_OPTIONS

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

	{

#ifndef BF_PTR2

	BF_LONG l,r;

	const BF_LONG *p,*s;

#if BF_ROUNDS == 20

	BF_ENC(r,l,s,p[20]);

	BF_ENC(l,r,s,p[19]);

	BF_ENC(r,l,s,p[18]);

	BF_ENC(l,r,s,p[17]);

#endif

#else

	BF_LONG l,r,t,*k;

	l=data[0];

	r=data[1];

	k=(BF_LONG *)key;

	l^=k[BF_ROUNDS+1];

#if BF_ROUNDS == 20

	BF_ENC(r,l,k,20);

	BF_ENC(l,r,k,19);

	BF_ENC(r,l,k,18);

	BF_ENC(l,r,k,17);

#endif

	BF_ENC(r,l,k,16);

	BF_ENC(l,r,k,15);

	BF_ENC(r,l,k,14);

	BF_ENC(l,r,k,13);

	BF_ENC(r,l,k,12);

	BF_ENC(l,r,k,11);

	BF_ENC(r,l,k,10);

	BF_ENC(l,r,k, 9);

	BF_ENC(r,l,k, 8);

	BF_ENC(l,r,k, 7);

	BF_ENC(r,l,k, 6);

	BF_ENC(l,r,k, 5);

	BF_ENC(r,l,k, 4);

	BF_ENC(l,r,k, 3);

	BF_ENC(r,l,k, 2);

	BF_ENC(l,r,k, 1);

	r^=k[0];

	data[1]=l&0xffffffffL;

	data[0]=r&0xffffffffL;

#endif

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

	     const BF_KEY *schedule, unsigned char *ivec, int encrypt)

	{

	BF_LONG tin0,tin1;

	BF_LONG tout0,tout1,xor0,xor1;

	long l=length;

		{

			{

			}

			{

	else

		{

			{

			xor0=tin0;

			xor1=tin1;

			}

			{

			xor0=tin0;

			xor1=tin1;

		}

	tin0=tin1=tout0=tout1=xor0=xor1=0;

#endif