crypto/bf/bf_enc.c - platform/external/openssl - Git at Google

 /* crypto/bf/bf_enc.c */
 /* 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
 	register BF_LONG l,r;
 	register const BF_LONG *p,*s;

 	p=key->P;
 	s= &(key->S[0]);
 	l=data[0];
 	r=data[1];

 	l^=p[0];
 	BF_ENC(r,l,s,p[ 1]);
 	BF_ENC(l,r,s,p[ 2]);
 	BF_ENC(r,l,s,p[ 3]);
 	BF_ENC(l,r,s,p[ 4]);
 	BF_ENC(r,l,s,p[ 5]);
 	BF_ENC(l,r,s,p[ 6]);
 	BF_ENC(r,l,s,p[ 7]);
 	BF_ENC(l,r,s,p[ 8]);
 	BF_ENC(r,l,s,p[ 9]);
 	BF_ENC(l,r,s,p[10]);
 	BF_ENC(r,l,s,p[11]);
 	BF_ENC(l,r,s,p[12]);
 	BF_ENC(r,l,s,p[13]);
 	BF_ENC(l,r,s,p[14]);
 	BF_ENC(r,l,s,p[15]);
 	BF_ENC(l,r,s,p[16]);
 #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
 	r^=p[BF_ROUNDS+1];

 	data[1]=l&0xffffffffL;
 	data[0]=r&0xffffffffL;
 #else
 	register 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
 	register BF_LONG l,r;
 	register const BF_LONG *p,*s;

 	p=key->P;
 	s= &(key->S[0]);
 	l=data[0];
 	r=data[1];

 	l^=p[BF_ROUNDS+1];
 #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
 	BF_ENC(r,l,s,p[16]);
 	BF_ENC(l,r,s,p[15]);
 	BF_ENC(r,l,s,p[14]);
 	BF_ENC(l,r,s,p[13]);
 	BF_ENC(r,l,s,p[12]);
 	BF_ENC(l,r,s,p[11]);
 	BF_ENC(r,l,s,p[10]);
 	BF_ENC(l,r,s,p[ 9]);
 	BF_ENC(r,l,s,p[ 8]);
 	BF_ENC(l,r,s,p[ 7]);
 	BF_ENC(r,l,s,p[ 6]);
 	BF_ENC(l,r,s,p[ 5]);
 	BF_ENC(r,l,s,p[ 4]);
 	BF_ENC(l,r,s,p[ 3]);
 	BF_ENC(r,l,s,p[ 2]);
 	BF_ENC(l,r,s,p[ 1]);
 	r^=p[0];

 	data[1]=l&0xffffffffL;
 	data[0]=r&0xffffffffL;
 #else
 	register 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)
 	{
 	register BF_LONG tin0,tin1;
 	register BF_LONG tout0,tout1,xor0,xor1;
 	register long l=length;
 	BF_LONG tin[2];

 	if (encrypt)
 		{
 		n2l(ivec,tout0);
 		n2l(ivec,tout1);
 		ivec-=8;
 		for (l-=8; l>=0; l-=8)
 			{
 			n2l(in,tin0);
 			n2l(in,tin1);
 			tin0^=tout0;
 			tin1^=tout1;
 			tin[0]=tin0;
 			tin[1]=tin1;
 			BF_encrypt(tin,schedule);
 			tout0=tin[0];
 			tout1=tin[1];
 			l2n(tout0,out);
 			l2n(tout1,out);
 			}
 		if (l != -8)
 			{
 			n2ln(in,tin0,tin1,l+8);
 			tin0^=tout0;
 			tin1^=tout1;
 			tin[0]=tin0;
 			tin[1]=tin1;
 			BF_encrypt(tin,schedule);
 			tout0=tin[0];
 			tout1=tin[1];
 			l2n(tout0,out);
 			l2n(tout1,out);
 			}
 		l2n(tout0,ivec);
 		l2n(tout1,ivec);
 		}
 	else
 		{
 		n2l(ivec,xor0);
 		n2l(ivec,xor1);
 		ivec-=8;
 		for (l-=8; l>=0; l-=8)
 			{
 			n2l(in,tin0);
 			n2l(in,tin1);
 			tin[0]=tin0;
 			tin[1]=tin1;
 			BF_decrypt(tin,schedule);
 			tout0=tin[0]^xor0;
 			tout1=tin[1]^xor1;
 			l2n(tout0,out);
 			l2n(tout1,out);
 			xor0=tin0;
 			xor1=tin1;
 			}
 		if (l != -8)
 			{
 			n2l(in,tin0);
 			n2l(in,tin1);
 			tin[0]=tin0;
 			tin[1]=tin1;
 			BF_decrypt(tin,schedule);
 			tout0=tin[0]^xor0;
 			tout1=tin[1]^xor1;
 			l2nn(tout0,tout1,out,l+8);
 			xor0=tin0;
 			xor1=tin1;
 			}
 		l2n(xor0,ivec);
 		l2n(xor1,ivec);
 		}
 	tin0=tin1=tout0=tout1=xor0=xor1=0;
 	tin[0]=tin[1]=0;
 	}

 #endif
	/* crypto/bf/bf_enc.c */
	/* 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
	register BF_LONG l,r;
	register const BF_LONG p,s;

	p=key->P;
	s= &(key->S[0]);
	l=data[0];
	r=data[1];

	l^=p[0];
	BF_ENC(r,l,s,p[ 1]);
	BF_ENC(l,r,s,p[ 2]);
	BF_ENC(r,l,s,p[ 3]);
	BF_ENC(l,r,s,p[ 4]);
	BF_ENC(r,l,s,p[ 5]);
	BF_ENC(l,r,s,p[ 6]);
	BF_ENC(r,l,s,p[ 7]);
	BF_ENC(l,r,s,p[ 8]);
	BF_ENC(r,l,s,p[ 9]);
	BF_ENC(l,r,s,p[10]);
	BF_ENC(r,l,s,p[11]);
	BF_ENC(l,r,s,p[12]);
	BF_ENC(r,l,s,p[13]);
	BF_ENC(l,r,s,p[14]);
	BF_ENC(r,l,s,p[15]);
	BF_ENC(l,r,s,p[16]);
	#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
	r^=p[BF_ROUNDS+1];

	data[1]=l&0xffffffffL;
	data[0]=r&0xffffffffL;
	#else
	register 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
	register BF_LONG l,r;
	register const BF_LONG p,s;

	p=key->P;
	s= &(key->S[0]);
	l=data[0];
	r=data[1];

	l^=p[BF_ROUNDS+1];
	#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
	BF_ENC(r,l,s,p[16]);
	BF_ENC(l,r,s,p[15]);
	BF_ENC(r,l,s,p[14]);
	BF_ENC(l,r,s,p[13]);
	BF_ENC(r,l,s,p[12]);
	BF_ENC(l,r,s,p[11]);
	BF_ENC(r,l,s,p[10]);
	BF_ENC(l,r,s,p[ 9]);
	BF_ENC(r,l,s,p[ 8]);
	BF_ENC(l,r,s,p[ 7]);
	BF_ENC(r,l,s,p[ 6]);
	BF_ENC(l,r,s,p[ 5]);
	BF_ENC(r,l,s,p[ 4]);
	BF_ENC(l,r,s,p[ 3]);
	BF_ENC(r,l,s,p[ 2]);
	BF_ENC(l,r,s,p[ 1]);
	r^=p[0];

	data[1]=l&0xffffffffL;
	data[0]=r&0xffffffffL;
	#else
	register 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)
	{
	register BF_LONG tin0,tin1;
	register BF_LONG tout0,tout1,xor0,xor1;
	register long l=length;
	BF_LONG tin[2];

	if (encrypt)
	{
	n2l(ivec,tout0);
	n2l(ivec,tout1);
	ivec-=8;
	for (l-=8; l>=0; l-=8)
	{
	n2l(in,tin0);
	n2l(in,tin1);
	tin0^=tout0;
	tin1^=tout1;
	tin[0]=tin0;
	tin[1]=tin1;
	BF_encrypt(tin,schedule);
	tout0=tin[0];
	tout1=tin[1];
	l2n(tout0,out);
	l2n(tout1,out);
	}
	if (l != -8)
	{
	n2ln(in,tin0,tin1,l+8);
	tin0^=tout0;
	tin1^=tout1;
	tin[0]=tin0;
	tin[1]=tin1;
	BF_encrypt(tin,schedule);
	tout0=tin[0];
	tout1=tin[1];
	l2n(tout0,out);
	l2n(tout1,out);
	}
	l2n(tout0,ivec);
	l2n(tout1,ivec);
	}
	else
	{
	n2l(ivec,xor0);
	n2l(ivec,xor1);
	ivec-=8;
	for (l-=8; l>=0; l-=8)
	{
	n2l(in,tin0);
	n2l(in,tin1);
	tin[0]=tin0;
	tin[1]=tin1;
	BF_decrypt(tin,schedule);
	tout0=tin[0]^xor0;
	tout1=tin[1]^xor1;
	l2n(tout0,out);
	l2n(tout1,out);
	xor0=tin0;
	xor1=tin1;
	}
	if (l != -8)
	{
	n2l(in,tin0);
	n2l(in,tin1);
	tin[0]=tin0;
	tin[1]=tin1;
	BF_decrypt(tin,schedule);
	tout0=tin[0]^xor0;
	tout1=tin[1]^xor1;
	l2nn(tout0,tout1,out,l+8);
	xor0=tin0;
	xor1=tin1;
	}
	l2n(xor0,ivec);
	l2n(xor1,ivec);
	}
	tin0=tin1=tout0=tout1=xor0=xor1=0;
	tin[0]=tin[1]=0;
	}

	#endif