/*

 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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

 */

#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 */