openssl/crypto/des/ecb3_enc.c

/*
 * 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 "des_local.h"

void DES_ecb3_encrypt(const_DES_cblock *input, DES_cblock *output,
                      DES_key_schedule *ks1, DES_key_schedule *ks2,
                      DES_key_schedule *ks3, int enc)
{
    register DES_LONG l0, l1;
    DES_LONG ll[2];
    const unsigned char *in = &(*input)[0];
    unsigned char *out = &(*output)[0];

    c2l(in, l0);
    c2l(in, l1);
    ll[0] = l0;
    ll[1] = l1;
    if (enc)
        DES_encrypt3(ll, ks1, ks2, ks3);
    else
        DES_decrypt3(ll, ks1, ks2, ks3);
    l0 = ll[0];
    l1 = ll[1];
    l2c(l0, out);
    l2c(l1, out);
}