/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>

#include "test_util.h"

#include "secu_defs.h"

#include <nettle/nettle-meta.h>
#include <nettle/aes.h>
#include <nettle/ctr.h>

static
void test_uncipher_ctr(const struct nettle_cipher *cipher, const uint8_t *key,
                       unsigned key_length, const uint8_t *cipheredtext,
                       unsigned length, const uint8_t *cleartext, const uint8_t *ictr)
{
  void *ctx = malloc(cipher->context_size);
  uint8_t *data = malloc(length);
  uint8_t *ctr = malloc(cipher->block_size);

#if NETTLE_VERSION_MAJOR < 3
  cipher->set_encrypt_key(ctx, key_length,  key);
#else
  cipher->set_encrypt_key(ctx,  key);
#endif

  memcpy(ctr, ictr, cipher->block_size);

  ctr_crypt(ctx, cipher->encrypt,
            cipher->block_size, ctr,
            length, data, cipheredtext);

  if (compare_buffer(data, length, cleartext, length) != 0) {
    fail("Fail: test_uncipher_ctr\n");
  }

  free(ctx);
  free(data);
  free(ctr);
}

void doit (void)
{
  /* From NIST spec 800-38a on AES modes,
   *
   * http://csrc.nist.gov/CryptoToolkit/modes/800-38_Series_Publications/SP800-38A.pdf
   *
   * F.5  CTR Example Vectors
   */
  /* F.5.1  CTR-AES128.Encrypt */
  test_uncipher_ctr(&nettle_aes128,
                    HL("2b7e151628aed2a6abf7158809cf4f3c"),
                    HL("6bc1bee22e409f96e93d7e117393172a"
                       "ae2d8a571e03ac9c9eb76fac45af8e51"
                       "30c81c46a35ce411e5fbc1191a0a52ef"
                       "f69f2445df4f9b17ad2b417be66c3710"),
                    H("874d6191b620e3261bef6864990db6ce"
                      "9806f66b7970fdff8617187bb9fffdff"
                      "5ae4df3edbd5d35e5b4f09020db03eab"
                      "1e031dda2fbe03d1792170a0f3009cee"),
                    H("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"));
}