/*
 *	shatest.cpp
 *
 *	Copyright (C) 1998
 *	Paul E. Jones <paulej@arid.us>
 *	All Rights Reserved
 *
 *****************************************************************************
 *	$Id: shatest.cpp,v 1.4 2004/03/27 18:02:38 paulej Exp $
 *****************************************************************************
 *
 *	Description:
 * 		This file will exercise the SHA1 class and perform the three
 * 		tests documented in FIPS PUB 180-1.
 *
 *	Portability Issues:
 *		None.
 *
 */

#include <iostream>
#include "sha1.h"

using namespace std;

/*
 *	Define patterns for testing
 */
#define TESTA	"abc"
#define TESTB	"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"

/*
 *	Function prototype
 */
void DisplayMessageDigest(unsigned *message_digest);

/*	
 *	main
 *
 *	Description:
 *		This is the entry point for the program
 *
 *	Parameters:
 *		None.
 *
 *	Returns:
 *		Nothing.
 *
 *	Comments:
 *
 */
int main()
{
	SHA1		sha;
	unsigned	message_digest[5];

	/*
	 *	Perform test A
	 */
	cout << endl << "Test A: 'abc'" << endl;

	sha.Reset();
	sha << TESTA;

	if (!sha.Result(message_digest))
	{
		cerr << "ERROR-- could not compute message digest" << endl;
	}
	else
	{
		DisplayMessageDigest(message_digest);
		cout << "Should match:" << endl;
		cout << '\t' << "A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D" << endl;
	}

	/*
	 *	Perform test B
	 */
	cout << endl << "Test B: " << TESTB << endl;

	sha.Reset();
	sha << TESTB;

	if (!sha.Result(message_digest))
	{
		cerr << "ERROR-- could not compute message digest" << endl;
	}
	else
	{
		DisplayMessageDigest(message_digest);
		cout << "Should match:" << endl;
		cout << '\t' << "84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1" << endl;
	}

	/*
	 *	Perform test C
	 */
	cout << endl << "Test C: One million 'a' characters" << endl;

	sha.Reset();
	for(int i = 1; i <= 1000000; i++) sha.Input('a');

	if (!sha.Result(message_digest))
	{
		cerr << "ERROR-- could not compute message digest" << endl;
	}
	else
	{
		DisplayMessageDigest(message_digest);
		cout << "Should match:" << endl;
		cout << '\t' << "34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F" << endl;
	}

	return 0;
}

/*	
 *	DisplayMessageDigest
 *
 *	Description:
 *		Display Message Digest array
 *
 *	Parameters:
 *		None.
 *
 *	Returns:
 *		Nothing.
 *
 *	Comments:
 *
 */
void DisplayMessageDigest(unsigned *message_digest)
{
	ios::fmtflags	flags;

	cout << '\t';

	flags = cout.setf(ios::hex|ios::uppercase,ios::basefield);
	cout.setf(ios::uppercase);

	for(int i = 0; i < 5 ; i++)
	{
		cout << message_digest[i] << ' ';
	}

	cout << endl;

	cout.setf(flags);
}