openssl/crypto/rc2/rc2_ecb.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
 */

/*
 * RC2 low level APIs are deprecated for public use, but still ok for internal
 * use.
 */
#include "internal/deprecated.h"

#include <openssl/rc2.h>
#include "rc2_local.h"
#include <openssl/opensslv.h>

/*-
 * RC2 as implemented frm a posting from
 * Newsgroups: sci.crypt
 * Subject: Specification for Ron Rivests Cipher No.2
 * Message-ID: <4fk39f$f70@net.auckland.ac.nz>
 * Date: 11 Feb 1996 06:45:03 GMT
 */

void RC2_ecb_encrypt(const unsigned char *in, unsigned char *out, RC2_KEY *ks,
                     int encrypt)
{
    unsigned long l, d[2];

    c2l(in, l);
    d[0] = l;
    c2l(in, l);
    d[1] = l;
    if (encrypt)
        RC2_encrypt(d, ks);
    else
        RC2_decrypt(d, ks);
    l = d[0];
    l2c(l, out);
    l = d[1];
    l2c(l, out);
    l = d[0] = d[1] = 0;
}