openssl/crypto/des/ecb_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"
#include <openssl/opensslv.h>
#include <openssl/bio.h>


const char *DES_options(void)
{
    static int init = 1;
    static char buf[12];

    if (init) {
        if (sizeof(DES_LONG) != sizeof(long))
            OPENSSL_strlcpy(buf, "des(int)", sizeof(buf));
        else
            OPENSSL_strlcpy(buf, "des(long)", sizeof(buf));
        init = 0;
    }
    return buf;
}

void DES_ecb_encrypt(const_DES_cblock *input, DES_cblock *output,
                     DES_key_schedule *ks, int enc)
{
    register DES_LONG l;
    DES_LONG ll[2];
    const unsigned char *in = &(*input)[0];
    unsigned char *out = &(*output)[0];

    c2l(in, l);
    ll[0] = l;
    c2l(in, l);
    ll[1] = l;
    DES_encrypt1(ll, ks, enc);
    l = ll[0];
    l2c(l, out);
    l = ll[1];
    l2c(l, out);
    l = ll[0] = ll[1] = 0;
}