/* crypto/des/des_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"

 EXPORT_C void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)

 	{

 	register DES_LONG l,r,t,u;

 #ifdef DES_PTR

 	register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;

 #endif

 #ifndef DES_UNROLL

 	register int i;

 #endif

 	register DES_LONG *s;

 	r=data[0];

 	l=data[1];

 	IP(r,l);

 	/* Things have been modified so that the initial rotate is

 	 * done outside the loop.  This required the

 	 * DES_SPtrans values in sp.h to be rotated 1 bit to the right.

 	 * One perl script later and things have a 5% speed up on a sparc2.

 	 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>

 	 * for pointing this out. */

 	/* clear the top bits on machines with 8byte longs */

 	/* shift left by 2 */

 	r=ROTATE(r,29)&0xffffffffL;

 	l=ROTATE(l,29)&0xffffffffL;

 	s=ks->ks->deslong;

 	/* I don't know if it is worth the effort of loop unrolling the

 	 * inner loop */

 	if (enc)

 		{

 #ifdef DES_UNROLL

 		D_ENCRYPT(l,r, 0); /*  1 */

 		D_ENCRYPT(r,l, 2); /*  2 */

 		D_ENCRYPT(l,r, 4); /*  3 */

 		D_ENCRYPT(r,l, 6); /*  4 */

 		D_ENCRYPT(l,r, 8); /*  5 */

 		D_ENCRYPT(r,l,10); /*  6 */

 		D_ENCRYPT(l,r,12); /*  7 */

 		D_ENCRYPT(r,l,14); /*  8 */

 		D_ENCRYPT(l,r,16); /*  9 */

 		D_ENCRYPT(r,l,18); /*  10 */

 		D_ENCRYPT(l,r,20); /*  11 */

 		D_ENCRYPT(r,l,22); /*  12 */

 		D_ENCRYPT(l,r,24); /*  13 */

 		D_ENCRYPT(r,l,26); /*  14 */

 		D_ENCRYPT(l,r,28); /*  15 */

 		D_ENCRYPT(r,l,30); /*  16 */

 #else

 		for (i=0; i<32; i+=8)

 			{

 			D_ENCRYPT(l,r,i+0); /*  1 */

 			D_ENCRYPT(r,l,i+2); /*  2 */

 			D_ENCRYPT(l,r,i+4); /*  3 */

 			D_ENCRYPT(r,l,i+6); /*  4 */

 			}

 #endif

 		}

 	else

 		{

 #ifdef DES_UNROLL

 		D_ENCRYPT(l,r,30); /* 16 */

 		D_ENCRYPT(r,l,28); /* 15 */

 		D_ENCRYPT(l,r,26); /* 14 */

 		D_ENCRYPT(r,l,24); /* 13 */

 		D_ENCRYPT(l,r,22); /* 12 */

 		D_ENCRYPT(r,l,20); /* 11 */

 		D_ENCRYPT(l,r,18); /* 10 */

 		D_ENCRYPT(r,l,16); /*  9 */

 		D_ENCRYPT(l,r,14); /*  8 */

 		D_ENCRYPT(r,l,12); /*  7 */

 		D_ENCRYPT(l,r,10); /*  6 */

 		D_ENCRYPT(r,l, 8); /*  5 */

 		D_ENCRYPT(l,r, 6); /*  4 */

 		D_ENCRYPT(r,l, 4); /*  3 */

 		D_ENCRYPT(l,r, 2); /*  2 */

 		D_ENCRYPT(r,l, 0); /*  1 */

 #else

 		for (i=30; i>0; i-=8)

 			{

 			D_ENCRYPT(l,r,i-0); /* 16 */

 			D_ENCRYPT(r,l,i-2); /* 15 */

 			D_ENCRYPT(l,r,i-4); /* 14 */

 			D_ENCRYPT(r,l,i-6); /* 13 */

 			}

 #endif

 		}

 	/* rotate and clear the top bits on machines with 8byte longs */

 	l=ROTATE(l,3)&0xffffffffL;

 	r=ROTATE(r,3)&0xffffffffL;

 	FP(r,l);

 	data[0]=l;

 	data[1]=r;

 	l=r=t=u=0;

 	}

 EXPORT_C void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)

 	{

 	register DES_LONG l,r,t,u;

 #ifdef DES_PTR

 	register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;

 #endif

 #ifndef DES_UNROLL

 	register int i;

 #endif

 	register DES_LONG *s;

 	r=data[0];

 	l=data[1];

 	/* Things have been modified so that the initial rotate is

 	 * done outside the loop.  This required the

 	 * DES_SPtrans values in sp.h to be rotated 1 bit to the right.

 	 * One perl script later and things have a 5% speed up on a sparc2.

 	 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>

 	 * for pointing this out. */

 	/* clear the top bits on machines with 8byte longs */

 	r=ROTATE(r,29)&0xffffffffL;

 	l=ROTATE(l,29)&0xffffffffL;

 	s=ks->ks->deslong;

 	/* I don't know if it is worth the effort of loop unrolling the

 	 * inner loop */

 	if (enc)

 		{

 #ifdef DES_UNROLL

 		D_ENCRYPT(l,r, 0); /*  1 */

 		D_ENCRYPT(r,l, 2); /*  2 */

 		D_ENCRYPT(l,r, 4); /*  3 */

 		D_ENCRYPT(r,l, 6); /*  4 */

 		D_ENCRYPT(l,r, 8); /*  5 */

 		D_ENCRYPT(r,l,10); /*  6 */

 		D_ENCRYPT(l,r,12); /*  7 */

 		D_ENCRYPT(r,l,14); /*  8 */

 		D_ENCRYPT(l,r,16); /*  9 */

 		D_ENCRYPT(r,l,18); /*  10 */

 		D_ENCRYPT(l,r,20); /*  11 */

 		D_ENCRYPT(r,l,22); /*  12 */

 		D_ENCRYPT(l,r,24); /*  13 */

 		D_ENCRYPT(r,l,26); /*  14 */

 		D_ENCRYPT(l,r,28); /*  15 */

 		D_ENCRYPT(r,l,30); /*  16 */

 #else

 		for (i=0; i<32; i+=8)

 			{

 			D_ENCRYPT(l,r,i+0); /*  1 */

 			D_ENCRYPT(r,l,i+2); /*  2 */

 			D_ENCRYPT(l,r,i+4); /*  3 */

 			D_ENCRYPT(r,l,i+6); /*  4 */

 			}

 #endif

 		}

 	else

 		{

 #ifdef DES_UNROLL

 		D_ENCRYPT(l,r,30); /* 16 */

 		D_ENCRYPT(r,l,28); /* 15 */

 		D_ENCRYPT(l,r,26); /* 14 */

 		D_ENCRYPT(r,l,24); /* 13 */

 		D_ENCRYPT(l,r,22); /* 12 */

 		D_ENCRYPT(r,l,20); /* 11 */

 		D_ENCRYPT(l,r,18); /* 10 */

 		D_ENCRYPT(r,l,16); /*  9 */

 		D_ENCRYPT(l,r,14); /*  8 */

 		D_ENCRYPT(r,l,12); /*  7 */

 		D_ENCRYPT(l,r,10); /*  6 */

 		D_ENCRYPT(r,l, 8); /*  5 */

 		D_ENCRYPT(l,r, 6); /*  4 */

 		D_ENCRYPT(r,l, 4); /*  3 */

 		D_ENCRYPT(l,r, 2); /*  2 */

 		D_ENCRYPT(r,l, 0); /*  1 */

 #else

 		for (i=30; i>0; i-=8)

 			{

 			D_ENCRYPT(l,r,i-0); /* 16 */

 			D_ENCRYPT(r,l,i-2); /* 15 */

 			D_ENCRYPT(l,r,i-4); /* 14 */

 			D_ENCRYPT(r,l,i-6); /* 13 */

 			}

 #endif

 		}

 	/* rotate and clear the top bits on machines with 8byte longs */

 	data[0]=ROTATE(l,3)&0xffffffffL;

 	data[1]=ROTATE(r,3)&0xffffffffL;

 	l=r=t=u=0;

 	}

 EXPORT_C void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,

 		  DES_key_schedule *ks2, DES_key_schedule *ks3)

 	{

 	register DES_LONG l,r;

 	l=data[0];

 	r=data[1];

 	IP(l,r);

 	data[0]=l;

 	data[1]=r;

 	DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);

 	DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);

 	DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);

 	l=data[0];

 	r=data[1];

 	FP(r,l);

 	data[0]=l;

 	data[1]=r;

 	}

 EXPORT_C void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,

 		  DES_key_schedule *ks2, DES_key_schedule *ks3)

 	{

 	register DES_LONG l,r;

 	l=data[0];

 	r=data[1];

 	IP(l,r);

 	data[0]=l;

 	data[1]=r;

 	DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);

 	DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);

 	DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);

 	l=data[0];

 	r=data[1];

 	FP(r,l);

 	data[0]=l;

 	data[1]=r;

 	}

 #ifndef DES_DEFAULT_OPTIONS

 #undef CBC_ENC_C__DONT_UPDATE_IV

 #include "ncbc_enc.c" /* DES_ncbc_encrypt */

 EXPORT_C void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,

 			  long length, DES_key_schedule *ks1,

 			  DES_key_schedule *ks2, DES_key_schedule *ks3,

 			  DES_cblock *ivec, int enc)

 	{

 	register DES_LONG tin0,tin1;

 	register DES_LONG tout0,tout1,xor0,xor1;

 	register const unsigned char *in;

 	unsigned char *out;

 	register long l=length;

 	DES_LONG tin[2];

 	unsigned char *iv;

 	in=input;

 	out=output;

 	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;

 			tin1^=tout1;

 			tin[0]=tin0;

 			tin[1]=tin1;

 			DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);

 			tout0=tin[0];

 			tout1=tin[1];

 			l2c(tout0,out);

 			l2c(tout1,out);

 			}

 		if (l != -8)

 			{

 			c2ln(in,tin0,tin1,l+8);

 			tin0^=tout0;

 			tin1^=tout1;

 			tin[0]=tin0;

 			tin[1]=tin1;

 			DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);

 			tout0=tin[0];

 			tout1=tin[1];

 			l2c(tout0,out);

 			l2c(tout1,out);

 			}

 		iv = &(*ivec)[0];

 		l2c(tout0,iv);

 		l2c(tout1,iv);

 		}

 	else

 		{

 		register DES_LONG t0,t1;

 		c2l(iv,xor0);

 		c2l(iv,xor1);

 		for (l-=8; l>=0; l-=8)

 			{

 			c2l(in,tin0);

 			c2l(in,tin1);

 			t0=tin0;

 			t1=tin1;

 			tin[0]=tin0;

 			tin[1]=tin1;

 			DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);

 			tout0=tin[0];

 			tout1=tin[1];

 			tout0^=xor0;

 			tout1^=xor1;

 			l2c(tout0,out);

 			l2c(tout1,out);

 			xor0=t0;

 			xor1=t1;

 			}

 		if (l != -8)

 			{

 			c2l(in,tin0);

 			c2l(in,tin1);

 			t0=tin0;

 			t1=tin1;

 			tin[0]=tin0;

 			tin[1]=tin1;

 			DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);

 			tout0=tin[0];

 			tout1=tin[1];

 			tout0^=xor0;

 			tout1^=xor1;

 			l2cn(tout0,tout1,out,l+8);

 			xor0=t0;

 			xor1=t1;

 			}

 		iv = &(*ivec)[0];

 		l2c(xor0,iv);

 		l2c(xor1,iv);

 		}

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

 	tin[0]=tin[1]=0;

 	}

 #endif /* DES_DEFAULT_OPTIONS */