/*
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.
*/

/* test driver and function exerciser for RSA API Functions */

#include <stdio.h>
#include <time.h>
#include "rsa.h"

int main()
{
  int i,bytes,res;
  unsigned long ran;
  char m[RFS],ml[RFS],c[RFS],e[RFS],raw[100];
  rsa_public_key pub;
  rsa_private_key priv;
  csprng RNG;
  octet M={0,sizeof(m),m};
  octet ML={0,sizeof(ml),ml};
  octet C={0,sizeof(c),c};
  octet E={0,sizeof(e),e};
  octet RAW={0,sizeof(raw),raw};

  time((time_t *)&ran);

  RAW.len=100;				/* fake random seed source */
  RAW.val[0]=ran;
  RAW.val[1]=ran>>8;
  RAW.val[2]=ran>>16;
  RAW.val[3]=ran>>24;
  for (i=4;i<100;i++) RAW.val[i]=i;

  RSA_CREATE_CSPRNG(&RNG,&RAW);   /* initialise strong RNG */

  printf("Generating public/private key pair\n");
  RSA_KEY_PAIR(&RNG,65537,&priv,&pub);

  printf("Encrypting test string\n");
  OCT_jstring(&M,(char *)"Hello World\n");
  RSA_OAEP_ENCODE(&M,&RNG,NULL,&E); /* OAEP encode message m to e  */

  RSA_ENCRYPT(&pub,&E,&C);     /* encrypt encoded message */
  printf("Ciphertext= "); OCT_output(&C);

  printf("Decrypting test string\n");
  RSA_DECRYPT(&priv,&C,&ML);   /* ... and then decrypt it */

  RSA_OAEP_DECODE(NULL,&ML);    /* decode it */
  OCT_output_string(&ML);

  if (!OCT_comp(&M,&ML))
    {
      printf("FAILURE RSA Encryption failed");
      return 1;
    }

  OCT_clear(&M); OCT_clear(&ML);   /* clean up afterwards */
  OCT_clear(&C); OCT_clear(&RAW); OCT_clear(&E);

  RSA_KILL_CSPRNG(&RNG);

  RSA_PRIVATE_KEY_KILL(&priv);

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