crypto/des/xcbc_enc.c - third_party/openssl - Git at Google

 /* crypto/des/xcbc_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 "des_locl.h"

 /* RSA's DESX */

 #if 0 /* broken code, preserved just in case anyone specifically looks for this */
 static const unsigned char desx_white_in2out[256]={
 0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0,
 0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A,
 0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36,
 0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C,
 0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60,
 0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA,
 0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E,
 0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF,
 0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6,
 0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3,
 0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C,
 0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2,
 0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5,
 0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5,
 0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F,
 0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB,
 	};

 void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white,
 	     DES_cblock *out_white)
 	{
 	int out0,out1;
 	int i;
 	const unsigned char *key = &(*des_key)[0];
 	const unsigned char *in = &(*in_white)[0];
 	unsigned char *out = &(*out_white)[0];

 	out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0;
 	out0=out1=0;
 	for (i=0; i<8; i++)
 		{
 		out[i]=key[i]^desx_white_in2out[out0^out1];
 		out0=out1;
 		out1=(int)out[i&0x07];
 		}

 	out0=out[0];
 	out1=out[i]; /* BUG: out-of-bounds read */
 	for (i=0; i<8; i++)
 		{
 		out[i]=in[i]^desx_white_in2out[out0^out1];
 		out0=out1;
 		out1=(int)out[i&0x07];
 		}
 	}
 #endif

 void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
 		      long length, DES_key_schedule *schedule,
 		      DES_cblock *ivec, const_DES_cblock *inw,
 		      const_DES_cblock *outw, int enc)
 	{
 	register DES_LONG tin0,tin1;
 	register DES_LONG tout0,tout1,xor0,xor1;
 	register DES_LONG inW0,inW1,outW0,outW1;
 	register const unsigned char *in2;
 	register long l=length;
 	DES_LONG tin[2];
 	unsigned char *iv;

 	in2 = &(*inw)[0];
 	c2l(in2,inW0);
 	c2l(in2,inW1);
 	in2 = &(*outw)[0];
 	c2l(in2,outW0);
 	c2l(in2,outW1);

 	iv = &(*ivec)[0];

 	if (enc)
 		{
 		c2l(iv,tout0);
 		c2l(iv,tout1);
 		for (l-=8; l>=0; l-=8)
 			{
 			c2l(in,tin0);
 			c2l(in,tin1);
 			tin0^=tout0^inW0; tin[0]=tin0;
 			tin1^=tout1^inW1; tin[1]=tin1;
 			DES_encrypt1(tin,schedule,DES_ENCRYPT);
 			tout0=tin[0]^outW0; l2c(tout0,out);
 			tout1=tin[1]^outW1; l2c(tout1,out);
 			}
 		if (l != -8)
 			{
 			c2ln(in,tin0,tin1,l+8);
 			tin0^=tout0^inW0; tin[0]=tin0;
 			tin1^=tout1^inW1; tin[1]=tin1;
 			DES_encrypt1(tin,schedule,DES_ENCRYPT);
 			tout0=tin[0]^outW0; l2c(tout0,out);
 			tout1=tin[1]^outW1; l2c(tout1,out);
 			}
 		iv = &(*ivec)[0];
 		l2c(tout0,iv);
 		l2c(tout1,iv);
 		}
 	else
 		{
 		c2l(iv,xor0);
 		c2l(iv,xor1);
 		for (l-=8; l>0; l-=8)
 			{
 			c2l(in,tin0); tin[0]=tin0^outW0;
 			c2l(in,tin1); tin[1]=tin1^outW1;
 			DES_encrypt1(tin,schedule,DES_DECRYPT);
 			tout0=tin[0]^xor0^inW0;
 			tout1=tin[1]^xor1^inW1;
 			l2c(tout0,out);
 			l2c(tout1,out);
 			xor0=tin0;
 			xor1=tin1;
 			}
 		if (l != -8)
 			{
 			c2l(in,tin0); tin[0]=tin0^outW0;
 			c2l(in,tin1); tin[1]=tin1^outW1;
 			DES_encrypt1(tin,schedule,DES_DECRYPT);
 			tout0=tin[0]^xor0^inW0;
 			tout1=tin[1]^xor1^inW1;
 			l2cn(tout0,tout1,out,l+8);
 			xor0=tin0;
 			xor1=tin1;
 			}

 		iv = &(*ivec)[0];
 		l2c(xor0,iv);
 		l2c(xor1,iv);
 		}
 	tin0=tin1=tout0=tout1=xor0=xor1=0;
 	inW0=inW1=outW0=outW1=0;
 	tin[0]=tin[1]=0;
 	}
	/* crypto/des/xcbc_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 "des_locl.h"

	/* RSA's DESX */

	#if 0 /* broken code, preserved just in case anyone specifically looks for this */
	static const unsigned char desx_white_in2out[256]={
	0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0,
	0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A,
	0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36,
	0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C,
	0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60,
	0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA,
	0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E,
	0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF,
	0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6,
	0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3,
	0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C,
	0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2,
	0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5,
	0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5,
	0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F,
	0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB,
	};

	void DES_xwhite_in2out(const_DES_cblock des_key, const_DES_cblock in_white,
	DES_cblock *out_white)
	{
	int out0,out1;
	int i;
	const unsigned char key = &(des_key)[0];
	const unsigned char in = &(in_white)[0];
	unsigned char out = &(out_white)[0];

	out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0;
	out0=out1=0;
	for (i=0; i<8; i++)
	{
	out[i]=key[i]^desx_white_in2out[out0^out1];
	out0=out1;
	out1=(int)out[i&0x07];
	}

	out0=out[0];
	out1=out[i]; /* BUG: out-of-bounds read */
	for (i=0; i<8; i++)
	{
	out[i]=in[i]^desx_white_in2out[out0^out1];
	out0=out1;
	out1=(int)out[i&0x07];
	}
	}
	#endif

	void DES_xcbc_encrypt(const unsigned char in, unsigned char out,
	long length, DES_key_schedule *schedule,
	DES_cblock ivec, const_DES_cblock inw,
	const_DES_cblock *outw, int enc)
	{
	register DES_LONG tin0,tin1;
	register DES_LONG tout0,tout1,xor0,xor1;
	register DES_LONG inW0,inW1,outW0,outW1;
	register const unsigned char *in2;
	register long l=length;
	DES_LONG tin[2];
	unsigned char *iv;

	in2 = &(*inw)[0];
	c2l(in2,inW0);
	c2l(in2,inW1);
	in2 = &(*outw)[0];
	c2l(in2,outW0);
	c2l(in2,outW1);

	iv = &(*ivec)[0];

	if (enc)
	{
	c2l(iv,tout0);
	c2l(iv,tout1);
	for (l-=8; l>=0; l-=8)
	{
	c2l(in,tin0);
	c2l(in,tin1);
	tin0^=tout0^inW0; tin[0]=tin0;
	tin1^=tout1^inW1; tin[1]=tin1;
	DES_encrypt1(tin,schedule,DES_ENCRYPT);
	tout0=tin[0]^outW0; l2c(tout0,out);
	tout1=tin[1]^outW1; l2c(tout1,out);
	}
	if (l != -8)
	{
	c2ln(in,tin0,tin1,l+8);
	tin0^=tout0^inW0; tin[0]=tin0;
	tin1^=tout1^inW1; tin[1]=tin1;
	DES_encrypt1(tin,schedule,DES_ENCRYPT);
	tout0=tin[0]^outW0; l2c(tout0,out);
	tout1=tin[1]^outW1; l2c(tout1,out);
	}
	iv = &(*ivec)[0];
	l2c(tout0,iv);
	l2c(tout1,iv);
	}
	else
	{
	c2l(iv,xor0);
	c2l(iv,xor1);
	for (l-=8; l>0; l-=8)
	{
	c2l(in,tin0); tin[0]=tin0^outW0;
	c2l(in,tin1); tin[1]=tin1^outW1;
	DES_encrypt1(tin,schedule,DES_DECRYPT);
	tout0=tin[0]^xor0^inW0;
	tout1=tin[1]^xor1^inW1;
	l2c(tout0,out);
	l2c(tout1,out);
	xor0=tin0;
	xor1=tin1;
	}
	if (l != -8)
	{
	c2l(in,tin0); tin[0]=tin0^outW0;
	c2l(in,tin1); tin[1]=tin1^outW1;
	DES_encrypt1(tin,schedule,DES_DECRYPT);
	tout0=tin[0]^xor0^inW0;
	tout1=tin[1]^xor1^inW1;
	l2cn(tout0,tout1,out,l+8);
	xor0=tin0;
	xor1=tin1;
	}

	iv = &(*ivec)[0];
	l2c(xor0,iv);
	l2c(xor1,iv);
	}
	tin0=tin1=tout0=tout1=xor0=xor1=0;
	inW0=inW1=outW0=outW1=0;
	tin[0]=tin[1]=0;
	}