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des_enc.c
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des_enc.c
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/*
* 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 */