package cryptix.examples;

import cryptix.security.DES;

public final class TestDES
{
	public static final void
	main( String argv[] )
	{
		try
		{
			myMain( argv );
		}
		catch( Throwable t )
		{
			t.printStackTrace();
		}
	}

	private static void
	myMain( String argv[] )
	throws Exception
	{
		test( "0101010101010101", "95f8a5e5dd31d900", "8000000000000000" );
		test( "0101010101010101", "9d64555a9a10b852", "0000001000000000" );
		test( "3849674c2602319e", "51454b582ddf440a", "7178876e01f19b2a" );
		test( "04b915ba43feb5b6", "42fd443059577fa2", "af37fb421f8c4095" );
		test( "49e95d6d4ca229bf", "02fe55778117f12a", "5a6b612cc26cce4a" );
		test( "018310dc409b26d6", "1d9d5c5018f728c2", "5f4c038ed12b2e41" );
	}
	
	private static void
	test( String keyStr, String plainStr, String cipherStr )
	{
		byte key[] = fromString( keyStr );
		byte plain[] = fromString( plainStr );
		byte cipher[] = fromString( cipherStr );
		DES des = new DES( key );
		byte encP[] = new byte[plain.length];
		byte decC[] = new byte[plain.length];
		des.encrypt( plain, encP );
		String a,b;
		System.out.println( "plain:" + toString( plain ) + " enc:" + ( a = toString( encP ) ) + " real:" + ( b = toString( cipher) ) );
		if ( a.equals( b ) )
			System.out.println( "encryption good" );
		else
			System.out.println( " ********* DES ENC FAILED ********* " );
		des.decrypt( encP, decC );
		System.out.println( "  enc:" + toString( encP ) + " dec:" + ( a = toString( decC ) ) + " real:" + ( b = toString( plain ) ) );
		if ( a.equals( b ) )
			System.out.println( "decryption good" );
		else
			System.out.println( " ********* DES DEC FAILED ********* " );
	}

	private static byte[]
	fromString( String inHex )
	{
		int len=inHex.length();
		int pos =0;
		byte buffer[] = new byte [( ( len + 1 ) / 2 )];
		if ( ( len % 2 ) == 1 )
		{
			buffer[0]=(byte)asciiToHex(inHex.charAt(0));
			pos=1;
			len--;
		}

		for(int ptr = pos; len > 0; len -= 2 )
			buffer[pos++] = (byte)( 
					( asciiToHex( inHex.charAt( ptr++ ) ) << 4 ) |
					( asciiToHex( inHex.charAt( ptr++ ) ) )
					);
		return buffer;
	}

	private static final String
	toString( byte buffer[] )
	{
		StringBuffer returnBuffer = new StringBuffer();
		for ( int pos = 0, len = buffer.length; pos < len; pos++ )
			returnBuffer.append( hexToAscii( ( buffer[pos] >>> 4 ) & 0x0F ) )
						.append( hexToAscii( buffer[pos] & 0x0F ) );
		return returnBuffer.toString();
	}

	private static final int
	asciiToHex(char c)
	{
		if ( ( c >= 'a' ) && ( c <= 'f' ) )
			return ( c - 'a' + 10 );
		if ( ( c >= 'A' ) && ( c <= 'F' ) )
			return ( c - 'A' + 10 );
		if ( ( c >= '0' ) && ( c <= '9' ) )
			return ( c - '0' );
		throw new Error("ascii to hex failed");
	}

	private static char
	hexToAscii(int h)
	{
		if ( ( h >= 10 ) && ( h <= 15 ) )
			return (char)( 'A' + ( h - 10 ) );
		if ( ( h >= 0 ) && ( h <= 9 ) )
			return (char)( '0' + h );
		throw new Error("hex to ascii failed");
	}

}

/*
#
#	Some tests...
Left as an excersize for the reader ... 
#
# KEY              PLAINTEXT        CIPHERTEXT
# 0101010101010101 95f8a5e5dd31d900 8000000000000000
# 0101010101010101 dd7f121ca5015619 4000000000000000
# 0101010101010101 2e8653104f3834ea 2000000000000000
# 0101010101010101 4bd388ff6cd81d4f 1000000000000000
# 0101010101010101 20b9e767b2fb1456 0800000000000000
# 0101010101010101 55579380d77138ef 0400000000000000
# 0101010101010101 6cc5defaaf04512f 0200000000000000
# 0101010101010101 0d9f279ba5d87260 0100000000000000
# 0101010101010101 d9031b0271bd5a0a 0080000000000000
# 0101010101010101 424250b37c3dd951 0040000000000000
# 0101010101010101 b8061b7ecd9a21e5 0020000000000000
# 0101010101010101 f15d0f286b65bd28 0010000000000000
# 0101010101010101 add0cc8d6e5deba1 0008000000000000
# 0101010101010101 e6d5f82752ad63d1 0004000000000000
# 0101010101010101 ecbfe3bd3f591a5e 0002000000000000
# 0101010101010101 f356834379d165cd 0001000000000000
# 0101010101010101 2b9f982f20037fa9 0000800000000000
# 0101010101010101 889de068a16f0be6 0000400000000000
# 0101010101010101 e19e275d846a1298 0000200000000000
# 0101010101010101 329a8ed523d71aec 0000100000000000
# 0101010101010101 e7fce22557d23c97 0000080000000000
# 0101010101010101 12a9f5817ff2d65d 0000040000000000
# 0101010101010101 a484c3ad38dc9c19 0000020000000000
# 0101010101010101 fbe00a8a1ef8ad72 0000010000000000
# 0101010101010101 750d079407521363 0000008000000000
# 0101010101010101 64feed9c724c2faf 0000004000000000
# 0101010101010101 f02b263b328e2b60 0000002000000000
# 0101010101010101 9d64555a9a10b852 0000001000000000
# 0101010101010101 d106ff0bed5255d7 0000000800000000
# 0101010101010101 e1652c6b138c64a5 0000000400000000
# 0101010101010101 e428581186ec8f46 0000000200000000
# 0101010101010101 aeb5f5ede22d1a36 0000000100000000
# 0101010101010101 e943d7568aec0c5c 0000000080000000
# 0101010101010101 df98c8276f54b04b 0000000040000000
# 0101010101010101 b160e4680f6c696f 0000000020000000
# 0101010101010101 fa0752b07d9c4ab8 0000000010000000
# 0101010101010101 ca3a2b036dbc8502 0000000008000000
# 0101010101010101 5e0905517bb59bcf 0000000004000000
# 0101010101010101 814eeb3b91d90726 0000000002000000
# 0101010101010101 4d49db1532919c9f 0000000001000000
# 0101010101010101 25eb5fc3f8cf0621 0000000000800000
# 0101010101010101 ab6a20c0620d1c6f 0000000000400000
# 0101010101010101 79e90dbc98f92cca 0000000000200000
# 0101010101010101 866ecedd8072bb0e 0000000000100000
# 0101010101010101 8b54536f2f3e64a8 0000000000080000
# 0101010101010101 ea51d3975595b86b 0000000000040000
# 0101010101010101 caffc6ac4542de31 0000000000020000
# 0101010101010101 8dd45a2ddf90796c 0000000000010000
# 0101010101010101 1029d55e880ec2d0 0000000000008000
# 0101010101010101 5d86cb23639dbea9 0000000000004000
# 0101010101010101 1d1ca853ae7c0c5f 0000000000002000
# 0101010101010101 ce332329248f3228 0000000000001000
# 0101010101010101 8405d1abe24fb942 0000000000000800
# 0101010101010101 e643d78090ca4207 0000000000000400
# 0101010101010101 48221b9937748a23 0000000000000200
# 0101010101010101 dd7c0bbd61fafd54 0000000000000100
# 0101010101010101 2fbc291a570db5c4 0000000000000080
# 0101010101010101 e07c30d7e4e26e12 0000000000000040
# 0101010101010101 0953e2258e8e90a1 0000000000000020
# 0101010101010101 5b711bc4ceebf2ee 0000000000000010
# 0101010101010101 cc083f1e6d9e85f6 0000000000000008
# 0101010101010101 d2fd8867d50d2dfe 0000000000000004
# 0101010101010101 06e7ea22ce92708f 0000000000000002
# 0101010101010101 166b40b44aba4bd6 0000000000000001
# 8001010101010101 0000000000000000 95a8d72813daa94d
# 4001010101010101 0000000000000000 0eec1487dd8c26d5
# 2001010101010101 0000000000000000 7ad16ffb79c45926
# 1001010101010101 0000000000000000 d3746294ca6a6cf3
# 0801010101010101 0000000000000000 809f5f873c1fd761
# 0401010101010101 0000000000000000 c02faffec989d1fc
# 0201010101010101 0000000000000000 4615aa1d33e72f10
# 0180010101010101 0000000000000000 2055123350c00858
# 0140010101010101 0000000000000000 df3b99d6577397c8
# 0120010101010101 0000000000000000 31fe17369b5288c9
# 0110010101010101 0000000000000000 dfdd3cc64dae1642
# 0108010101010101 0000000000000000 178c83ce2b399d94
# 0104010101010101 0000000000000000 50f636324a9b7f80
# 0102010101010101 0000000000000000 a8468ee3bc18f06d
# 0101800101010101 0000000000000000 a2dc9e92fd3cde92
# 0101400101010101 0000000000000000 cac09f797d031287
# 0101200101010101 0000000000000000 90ba680b22aeb525
# 0101100101010101 0000000000000000 ce7a24f350e280b6
# 0101080101010101 0000000000000000 882bff0aa01a0b87
# 0101040101010101 0000000000000000 25610288924511c2
# 0101020101010101 0000000000000000 c71516c29c75d170
# 0101018001010101 0000000000000000 5199c29a52c9f059
# 0101014001010101 0000000000000000 c22f0a294a71f29f
# 0101012001010101 0000000000000000 ee371483714c02ea
# 0101011001010101 0000000000000000 a81fbd448f9e522f
# 0101010801010101 0000000000000000 4f644c92e192dfed
# 0101010401010101 0000000000000000 1afa9a66a6df92ae
# 0101010201010101 0000000000000000 b3c1cc715cb879d8
# 0101010180010101 0000000000000000 19d032e64ab0bd8b
# 0101010140010101 0000000000000000 3cfaa7a7dc8720dc
# 0101010120010101 0000000000000000 b7265f7f447ac6f3
# 0101010110010101 0000000000000000 9db73b3c0d163f54
# 0101010108010101 0000000000000000 8181b65babf4a975
# 0101010104010101 0000000000000000 93c9b64042eaa240
# 0101010102010101 0000000000000000 5570530829705592
# 0101010101800101 0000000000000000 8638809e878787a0
# 0101010101400101 0000000000000000 41b9a79af79ac208
# 0101010101200101 0000000000000000 7a9be42f2009a892
# 0101010101100101 0000000000000000 29038d56ba6d2745
# 0101010101080101 0000000000000000 5495c6abf1e5df51
# 0101010101040101 0000000000000000 ae13dbd561488933
# 0101010101020101 0000000000000000 024d1ffa8904e389
# 0101010101018001 0000000000000000 d1399712f99bf02e
# 0101010101014001 0000000000000000 14c1d7c1cffec79e
# 0101010101012001 0000000000000000 1de5279dae3bed6f
# 0101010101011001 0000000000000000 e941a33f85501303
# 0101010101010801 0000000000000000 da99dbbc9a03f379
# 0101010101010401 0000000000000000 b7fc92f91d8e92e9
# 0101010101010201 0000000000000000 ae8e5caa3ca04e85
# 0101010101010180 0000000000000000 9cc62df43b6eed74
# 0101010101010140 0000000000000000 d863dbb5c59a91a0
# 0101010101010120 0000000000000000 a1ab2190545b91d7
# 0101010101010110 0000000000000000 0875041e64c570f7
# 0101010101010108 0000000000000000 5a594528bebef1cc
# 0101010101010104 0000000000000000 fcdb3291de21f0c0
# 0101010101010102 0000000000000000 869efd7f9f265a09
# 1046913489980131 0000000000000000 88d55e54f54c97b4
# 1007103489988020 0000000000000000 0c0cc00c83ea48fd
# 10071034c8980120 0000000000000000 83bc8ef3a6570183
# 1046103489988020 0000000000000000 df725dcad94ea2e9
# 1086911519190101 0000000000000000 e652b53b550be8b0
# 1086911519580101 0000000000000000 af527120c485cbb0
# 5107b01519580101 0000000000000000 0f04ce393db926d5
# 1007b01519190101 0000000000000000 c9f00ffc74079067
# 3107915498080101 0000000000000000 7cfd82a593252b4e
# 3107919498080101 0000000000000000 cb49a2f9e91363e3
# 10079115b9080140 0000000000000000 00b588be70d23f56
# 3107911598090140 0000000000000000 406a9a6ab43399ae
# 1007d01589980101 0000000000000000 6cb773611dca9ada
# 9107911589980101 0000000000000000 67fd21c17dbb5d70
# 9107d01589190101 0000000000000000 9592cb4110430787
# 1007d01598980120 0000000000000000 a6b7ff68a318ddd3
# 1007940498190101 0000000000000000 4d102196c914ca16
# 0107910491190401 0000000000000000 2dfa9f4573594965
# 0107910491190101 0000000000000000 b46604816c0e0774
# 0107940491190401 0000000000000000 6e7e6221a4f34e87
# 19079210981a0101 0000000000000000 aa85e74643233199
# 1007911998190801 0000000000000000 2e5a19db4d1962d6
# 10079119981a0801 0000000000000000 23a866a809d30894
# 1007921098190101 0000000000000000 d812d961f017d320
# 100791159819010b 0000000000000000 055605816e58608f
# 1004801598190101 0000000000000000 abd88e8b1b7716f1
# 1004801598190102 0000000000000000 537ac95be69da1e1
# 1004801598190108 0000000000000000 aed0f6ae3c25cdd8
# 1002911598100104 0000000000000000 b3e35a5ee53e7b8d
# 1002911598190104 0000000000000000 61c79c71921a2ef8
# 1002911598100201 0000000000000000 e2f5728f0995013c
# 1002911698100101 0000000000000000 1aeac39a61f0a464
# 7ca110454a1a6e57 01a1d6d039776742 690f5b0d9a26939b
# 0131d9619dc1376e 5cd54ca83def57da 7a389d10354bd271
# 07a1133e4a0b2686 0248d43806f67172 868ebb51cab4599a
# 3849674c2602319e 51454b582ddf440a 7178876e01f19b2a
# 04b915ba43feb5b6 42fd443059577fa2 af37fb421f8c4095
# 0113b970fd34f2ce 059b5e0851cf143a 86a560f10ec6d85b
# 0170f175468fb5e6 0756d8e0774761d2 0cd3da020021dc09
# 43297fad38e373fe 762514b829bf486a ea676b2cb7db2b7a
# 07a7137045da2a16 3bdd119049372802 dfd64a815caf1a0f
# 04689104c2fd3b2f 26955f6835af609a 5c513c9c4886c088
# 37d06bb516cb7546 164d5e404f275232 0a2aeeae3ff4ab77
# 1f08260d1ac2465e 6b056e18759f5cca ef1bf03e5dfa575a
# 584023641aba6176 004bd6ef09176062 88bf0db6d70dee56
# 025816164629b007 480d39006ee762f2 a1f9915541020b56
# 49793ebc79b3258f 437540c8698f3cfa 6fbf1cafcffd0556
# 4fb05e1515ab73a7 072d43a077075292 2f22e49bab7ca1ac
# 49e95d6d4ca229bf 02fe55778117f12a 5a6b612cc26cce4a
# 018310dc409b26d6 1d9d5c5018f728c2 5f4c038ed12b2e41
# 1c587f1c13924fef 305532286d6f295a 63fac0d034d9f793

*/