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

 /*
  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 /*
  * DES low level APIs are deprecated for public use, but still ok for internal
  * use.
  */
 #include "internal/deprecated.h"

 #include <openssl/crypto.h>
 #include "des_local.h"
 #include "spr.h"

 void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
 {
     register DES_LONG l, r, t, u;
     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 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) {
         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 {
         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 */
     }

     /* 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;
 }

 void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
 {
     register DES_LONG l, r, t, u;
     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 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) {
         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 {
         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 */
     }
     /* 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;
 }

 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;
 }

 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 */

 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 */
	/*
	* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	/*
	* DES low level APIs are deprecated for public use, but still ok for internal
	* use.
	*/
	#include "internal/deprecated.h"

	#include <openssl/crypto.h>
	#include "des_local.h"
	#include "spr.h"

	void DES_encrypt1(DES_LONG data, DES_key_schedule ks, int enc)
	{
	register DES_LONG l, r, t, u;
	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 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) {
	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 {
	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 */
	}

	/* 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;
	}

	void DES_encrypt2(DES_LONG data, DES_key_schedule ks, int enc)
	{
	register DES_LONG l, r, t, u;
	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 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) {
	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 {
	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 */
	}
	/* 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;
	}

	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;
	}

	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 */

	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 */