//
// md5.cpp
//
// $Id: //poco/Main/Foundation/samples/md5/src/md5.cpp#5 $
//
// This sample demonstrates the DigestEngine, DigestOutputStream and
// MD5Engine classes.
//
// Copyright (c) 2004-2005, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/MD5Engine.h"
#include "Foundation/DigestStream.h"
#include "Foundation/StreamCopier.h"
#include <fstream>
#include <iostream>


using Foundation::DigestEngine;
using Foundation::MD5Engine;
using Foundation::DigestOutputStream;
using Foundation::StreamCopier;


int main(int argc, char** argv)
{
	if (argc != 2)
	{
		std::cout << "usage: " << argv[0] << ": <input_file>" << std::endl
		          << "       create the MD5 digest for <input_file>" << std::endl;
		return 1;
	}
	
	std::ifstream istr(argv[1], std::ios::binary);
	if (!istr)
	{
		std::cerr << "cannot open input file: " << argv[1] << std::endl;
		return 2;
	}
	
	MD5Engine md5;
	DigestOutputStream dos(md5);
	
	StreamCopier::copyStream(istr, dos);
	dos.close();

	std::cout << DigestEngine::digestToHex(md5.digest()) << std::endl;
	
	return 0;
}