/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
 *            test_srtp.cc
 *
 *  Mon Sep  2 14:02:16 CEST 2013
 *  Copyright 2013 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of lrtp.
 *
 * lrtp is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * lrtp is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with lrtp; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include <stdio.h>

#include "../src/rtp.h"
#include "../src/srtp.h"

#define KEY "123456789012345678901234567890123456789012345678901234567890"
#define SSRC 1234567890

void dump(const char *title, const char *buf, size_t size)
{
  printf("%12s: ", title);
  for(int i = 0; i < size; i++) {
    if(i % 8 == 0) printf(" ");
    printf("%02x ", (unsigned char)*buf++);
  }
  printf("\n");
}

int main()
{
  RTP rtp;
  rtp.setSSrc(SSRC);

  char payload[] = { 0xde, 0xad, 0xbe, 0xef };
  rtp.setPayload(payload, sizeof(payload));

  char buf[MAX_RTP_PACKET_SIZE];
  size_t sz = rtp.packet(buf, sizeof(buf));

  dump("Vanilla", buf, sz);

  {
    SRTP srtp(KEY, rtp.SSrc());
    sz = srtp.encrypt(buf, sz);
  }

  dump("Encrypted", buf, sz);

  {
    SRTP srtp(KEY, rtp.SSrc());
    sz = srtp.decrypt(buf, sz);
  }


  dump("Decrypted", buf, sz);

  printf("Compare:\n");
  char buf0[MAX_RTP_PACKET_SIZE];
  size_t sz0 = rtp.packet(buf0, sizeof(buf0));
  if(sz0 != sz) printf("Sizes differ (%d %d)...\n", sz0, sz);
  unsigned int sum = 0;
  for(int i = 0; i < sz0; i++) {
    sum += abs(buf0[i] - buf[i]);
  }
  if(sum) printf("NOT EQUAL! diff = %d\n", sum);
  else printf("Vanilla == Decrypted\n");

  return 0;
}