/*
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

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.
*/

#include <stdlib.h>
#include <string.h>
#include "amcl.h"
#include "wcc.h"
#include "utils.h"


int main()
{
  char* KT="feffe9928665731c6d6a8f9467308308";
  char* MT="d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39";
  char* HT="feedfacedeadbeeffeedfacedeadbeefabaddad2";
  char* NT="9313225df88406e555909c5aff5269aa6a7a9538534f7da1e4c303d2a318a728c3c0c95156809539fcf0e2429a6b525416aedbf5a0de6a57a637b39b";
  // Tag should be 619cc5aefffe0bfa462af43c1699d050

  int lenM=strlen(MT)/2;
  int lenH=strlen(HT)/2;
  int lenK=strlen(KT)/2;
  int lenIV=strlen(NT)/2;

  char t1[16];  // Tag
  char t2[16];  // Tag
  char k[16];   // AES Key
  char h[64];   // Header - to be included in Authentication, but not encrypted
  char iv[100]; // IV - Initialisation vector
  char m[100];  // Plaintext to be encrypted/authenticated
  char c[100];  // Ciphertext
  char p[100];  // Recovered Plaintext
  octet T1={sizeof(t1),sizeof(t1),t1};
  octet T2={sizeof(t2),sizeof(t2),t2};
  octet K={0,sizeof(k),k};
  octet H={0,sizeof(h),h};
  octet IV={0,sizeof(iv),iv};
  octet M={0,sizeof(m),m};
  octet C={0,sizeof(c),c};
  octet P={0,sizeof(p),p};
  M.len=lenM;
  K.len=lenK;
  H.len=lenH;
  IV.len=lenIV;

  hex2bytes(MT, m);
  hex2bytes(HT, h);
  hex2bytes(NT, iv);
  hex2bytes(KT, k);

  printf("Plaintext: ");
  OCT_output(&M);
  printf("\n");

  WCC_AES_GCM_ENCRYPT(&K, &IV, &H, &M, &C, &T1);

  printf("Ciphertext: ");
  OCT_output(&C);
  printf("\n");

  printf("Encryption Tag: ");
  OCT_output(&T1);
  printf("\n");

  WCC_AES_GCM_DECRYPT(&K, &IV, &H, &C, &P, &T2);

  printf("Plaintext: ");
  OCT_output(&P);
  printf("\n");

  printf("Decryption Tag: ");
  OCT_output(&T2);
  printf("\n");

  if (!OCT_comp(&M,&P))
    {
      printf("FAILURE Decryption\n");
      return 1;
    }

  if (!OCT_comp(&T1,&T2))
    {
      printf("FAILURE TAG mismatch\n");
      return 1;
    }

  printf("SUCCESS\n");
  return 0;
}