/* ====================================================================

 * 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

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 *    distribution.

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 * 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/)"

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 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

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 * 5. Products derived from this software may not be called "OpenSSL"

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 * 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/)"

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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * ==================================================================== */

#include <openssl/aes.h>

#include <assert.h>

#include "../aes/internal.h"

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

#include "../service_indicator/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) {

  if (hwaes_capable()) {

    CRYPTO_ctr128_encrypt_ctr32(in, out, len, key, ivec, ecount_buf, num,

                                aes_hw_ctr32_encrypt_blocks);

  } else if (vpaes_capable()) {

#if defined(VPAES_CTR32)

    // TODO(davidben): On ARM, where |BSAES| is additionally defined, this could

    // use |vpaes_ctr32_encrypt_blocks_with_bsaes|.

    CRYPTO_ctr128_encrypt_ctr32(in, out, len, key, ivec, ecount_buf, num,

                                vpaes_ctr32_encrypt_blocks);

#else

    CRYPTO_ctr128_encrypt(in, out, len, key, ivec, ecount_buf, num,

                          vpaes_encrypt);

#endif

  } else {

    CRYPTO_ctr128_encrypt_ctr32(in, out, len, key, ivec, ecount_buf, num,

                                aes_nohw_ctr32_encrypt_blocks);

  }

  FIPS_service_indicator_update_state();

}

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);

  }

  FIPS_service_indicator_update_state();

}

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 (hwaes_capable()) {

    aes_hw_cbc_encrypt(in, out, len, key, ivec, enc);

  } else if (!vpaes_capable()) {

    aes_nohw_cbc_encrypt(in, out, len, key, ivec, enc);

  } else if (enc) {

    CRYPTO_cbc128_encrypt(in, out, len, key, ivec, AES_encrypt);

  } else {

    CRYPTO_cbc128_decrypt(in, out, len, key, ivec, AES_decrypt);

  }

  FIPS_service_indicator_update_state();

}

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, 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, AES_encrypt);

  *num = (int)num_u;

}