crypto/aes/mode_wrappers.c

/* ====================================================================
 * Copyright (c) 2002-2006 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
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ==================================================================== */

#include <openssl/aes.h>

#include <assert.h>

#include "../modes/internal.h"


void AES_ctr128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
                        const AES_KEY *key, uint8_t ivec[AES_BLOCK_SIZE],
                        uint8_t ecount_buf[AES_BLOCK_SIZE], unsigned int *num) {
  CRYPTO_ctr128_encrypt(in, out, len, key, ivec, ecount_buf, num,
                        (block128_f)AES_encrypt);
}

void AES_ecb_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key,
                     const int enc) {
  assert(in && out && key);
  assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc));

  if (AES_ENCRYPT == enc) {
    AES_encrypt(in, out, key);
  } else {
    AES_decrypt(in, out, key);
  }
}

#if defined(OPENSSL_NO_ASM) || \
    (!defined(OPENSSL_X86_64) && !defined(OPENSSL_X86))
void AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len,
                     const AES_KEY *key, uint8_t *ivec, const int enc) {

  if (enc) {
    CRYPTO_cbc128_encrypt(in, out, len, key, ivec, (block128_f)AES_encrypt);
  } else {
    CRYPTO_cbc128_decrypt(in, out, len, key, ivec, (block128_f)AES_decrypt);
  }
}
#else

void asm_AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len,
                         const AES_KEY *key, uint8_t *ivec, const int enc);
void AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len,
                     const AES_KEY *key, uint8_t *ivec, const int enc) {
  asm_AES_cbc_encrypt(in, out, len, key, ivec, enc);
}

#endif  /* OPENSSL_NO_ASM || (!OPENSSL_X86_64 && !OPENSSL_X86) */

void AES_ofb128_encrypt(const uint8_t *in, uint8_t *out, size_t length,
                        const AES_KEY *key, uint8_t *ivec, int *num) {
  unsigned num_u = (unsigned)(*num);
  CRYPTO_ofb128_encrypt(in, out, length, key, ivec, &num_u,
                        (block128_f)AES_encrypt);
  *num = (int)num_u;
}

void AES_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t length,
                        const AES_KEY *key, uint8_t *ivec, int *num,
                        int enc) {
  unsigned num_u = (unsigned)(*num);
  CRYPTO_cfb128_encrypt(in, out, length, key, ivec, &num_u, enc,
                        (block128_f)AES_encrypt);
  *num = (int)num_u;
}