openssl/crypto/camellia/cmll_misc.c

/* crypto/camellia/camellia_misc.c -*- mode:C; c-file-style: "eay" -*- */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * ====================================================================
 *
 */

#include <openssl/opensslv.h>
#include <openssl/camellia.h>
#include "cmll_locl.h"
#include <openssl/crypto.h>
#ifdef OPENSSL_FIPS
# include <openssl/fips.h>
#endif

const char CAMELLIA_version[] = "CAMELLIA" OPENSSL_VERSION_PTEXT;

int Camellia_set_key(const unsigned char *userKey, const int bits,
                     CAMELLIA_KEY *key)
#ifdef OPENSSL_FIPS
{
    if (FIPS_mode())
        FIPS_BAD_ABORT(CAMELLIA)
            return private_Camellia_set_key(userKey, bits, key);
}

int private_Camellia_set_key(const unsigned char *userKey, const int bits,
                             CAMELLIA_KEY *key)
#endif
{
    if (!userKey || !key) {
        return -1;
    }

    switch (bits) {
    case 128:
        camellia_setup128(userKey, (unsigned int *)key->rd_key);
        key->enc = camellia_encrypt128;
        key->dec = camellia_decrypt128;
        break;
    case 192:
        camellia_setup192(userKey, (unsigned int *)key->rd_key);
        key->enc = camellia_encrypt256;
        key->dec = camellia_decrypt256;
        break;
    case 256:
        camellia_setup256(userKey, (unsigned int *)key->rd_key);
        key->enc = camellia_encrypt256;
        key->dec = camellia_decrypt256;
        break;
    default:
        return -2;
    }

    key->bitLength = bits;
    return 0;
}

void Camellia_encrypt(const unsigned char *in, unsigned char *out,
                      const CAMELLIA_KEY *key)
{
    u32 tmp[CAMELLIA_BLOCK_SIZE / sizeof(u32)];
    const union {
        long one;
        char little;
    } camellia_endian = {
        1
    };

    memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
    if (camellia_endian.little)
        SWAP4WORD(tmp);
    key->enc(key->rd_key, tmp);
    if (camellia_endian.little)
        SWAP4WORD(tmp);
    memcpy(out, tmp, CAMELLIA_BLOCK_SIZE);
}

void Camellia_decrypt(const unsigned char *in, unsigned char *out,
                      const CAMELLIA_KEY *key)
{
    u32 tmp[CAMELLIA_BLOCK_SIZE / sizeof(u32)];
    const union {
        long one;
        char little;
    } camellia_endian = {
        1
    };

    memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
    if (camellia_endian.little)
        SWAP4WORD(tmp);
    key->dec(key->rd_key, tmp);
    if (camellia_endian.little)
        SWAP4WORD(tmp);
    memcpy(out, tmp, CAMELLIA_BLOCK_SIZE);
}