#webliberty::TripleDES.pm (2007/06/22)
#Copyright(C) 2002-2007 Knight, All rights reserved.

package webliberty::TripleDES;

use strict;

### コンストラクタ
sub new {
	my $class = shift;

	my $self = {
		key => shift
	};
	bless $self, $class;

	return $self;
}

### トリプルDES暗号化
sub crypt_string {
	my $self   = shift;
	my $string = shift;

	$string = $self->_TripleDES($self->{key}, $string, 1, 0);
	$string = unpack('H*', $string);
	$string =~ s/\0//g;

	return $string;
}

### トリプルDES復号化
sub encrypt_string {
	my $self   = shift;
	my $string = shift;

	$string = pack('H*', $string);
	$string = $self->_TripleDES($self->{key}, $string, 0, 0);
	$string =~ s/\0//g;

	return $string;
}

### トリプルDES実行(参考：http://www.tero.co.uk/des/code.php)
sub _TripleDES {
	my $self = shift;
	my($key, $message, $encrypt, $mode, $iv) = @_;

	my @spfunction1 = (0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004);
	my @spfunction2 = (0x80108020,0x80008000,0x8000,0x108020,0x100000,0x20,0x80100020,0x80008020,0x80000020,0x80108020,0x80108000,0x80000000,0x80008000,0x100000,0x20,0x80100020,0x108000,0x100020,0x80008020,0,0x80000000,0x8000,0x108020,0x80100000,0x100020,0x80000020,0,0x108000,0x8020,0x80108000,0x80100000,0x8020,0,0x108020,0x80100020,0x100000,0x80008020,0x80100000,0x80108000,0x8000,0x80100000,0x80008000,0x20,0x80108020,0x108020,0x20,0x8000,0x80000000,0x8020,0x80108000,0x100000,0x80000020,0x100020,0x80008020,0x80000020,0x100020,0x108000,0,0x80008000,0x8020,0x80000000,0x80100020,0x80108020,0x108000);
	my @spfunction3 = (0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200);
	my @spfunction4 = (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);
	my @spfunction5 = (0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100);
	my @spfunction6 = (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);
	my @spfunction7 = (0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002);
	my @spfunction8 = (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);

	my @keys = $self->_create_deskeys($key);
	my($m, $i, $j, $temp, $temp2, $right1, $right2, $left, $right, @looping) = (0);
	my($cbcleft, $cbcleft2, $cbcright, $cbcright2);
	my($endloop, $loopinc, $result, $tempresult);
	my $len = length($message);
	my $chunk = 0;

	my $iterations = $#keys == 32 ? 3 : 9;
	if ($iterations == 3) {
		@looping = $encrypt ? (0, 32, 2) : (30, -2, -2);
	} else {
		@looping = $encrypt ? (0, 32, 2, 62, 30, -2, 64, 96, 2) : (94, 62, -2, 32, 64, 2, 30, -2, -2);
	}

	$message .= "\0\0\0\0\0\0\0\0";
	$result = '';
	$tempresult = '';

	if ($mode == 1) {
		$cbcleft  = (unpack('C', substr($iv, $m++, 1)) << 24) | (unpack('C', substr($iv, $m++, 1)) << 16) | (unpack('C', substr($iv, $m++, 1)) << 8) | unpack('C', substr($iv, $m++, 1));
		$cbcright = (unpack('C', substr($iv, $m++, 1)) << 24) | (unpack('C', substr($iv, $m++, 1)) << 16) | (unpack('C', substr($iv, $m++, 1)) << 8) | unpack('C', substr($iv, $m++, 1));

		$m = 0;
	}

	while ($m < $len) {
		$left  = (unpack('C', substr($message, $m++, 1)) << 24) | (unpack('C', substr($message, $m++, 1)) << 16) | (unpack('C', substr($message, $m++, 1)) << 8) | unpack('C', substr($message, $m++, 1));
		$right = (unpack('C', substr($message, $m++, 1)) << 24) | (unpack('C', substr($message, $m++, 1)) << 16) | (unpack('C', substr($message, $m++, 1)) << 8) | unpack('C', substr($message, $m++, 1));

		if ($mode == 1) {
			if ($encrypt) {
				$left  ^= $cbcleft;
				$right ^= $cbcright;
			} else {
				$cbcleft2  = $cbcleft;
				$cbcright2 = $cbcright;
				$cbcleft   = $left;
				$cbcright  = $right;
			}
		}

		$temp = (($left  >> 4)  ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left  ^= ($temp << 4);
		$temp = (($left  >> 16) ^ $right) & 0x0000ffff; $right ^= $temp; $left  ^= ($temp << 16);
		$temp = (($right >> 2)  ^ $left)  & 0x33333333; $left  ^= $temp; $right ^= ($temp << 2);
		$temp = (($right >> 8)  ^ $left)  & 0x00ff00ff; $left  ^= $temp; $right ^= ($temp << 8);
		$temp = (($left  >> 1)  ^ $right) & 0x55555555; $right ^= $temp; $left  ^= ($temp << 1);

		$left  = (($left  << 1) | ($left  >> 31)); 
		$right = (($right << 1) | ($right >> 31)); 

		for ($j = 0; $j < $iterations; $j += 3) {
			$endloop = $looping[$j+1];
			$loopinc = $looping[$j+2];

			for ($i = $looping[$j]; $i != $endloop; $i += $loopinc) {
				$right1 = $right ^ $keys[$i]; 
				$right2 = (($right >> 4) | ($right << 28)) ^ $keys[$i + 1];
				$temp   = $left;
				$left   = $right;
				$right  = $temp ^ (
					$spfunction2[($right1 >> 24) & 0x3f] |
					$spfunction4[($right1 >> 16) & 0x3f] |
					$spfunction6[($right1 >>  8) & 0x3f] |
					$spfunction8[$right1 & 0x3f]         |
					$spfunction1[($right2 >> 24) & 0x3f] |
					$spfunction3[($right2 >> 16) & 0x3f] |
					$spfunction5[($right2 >>  8) & 0x3f] |
					$spfunction7[$right2 & 0x3f]
				);
			}

			$temp  = $left;
			$left  = $right;
			$right = $temp;
		}

		$left  = (($left >> 1)  | ($left << 31));
		$right = (($right >> 1) | ($right << 31));

		$temp = (($left  >> 1)  ^ $right) & 0x55555555; $right ^= $temp; $left  ^= ($temp << 1);
		$temp = (($right >> 8)  ^ $left)  & 0x00ff00ff; $left  ^= $temp; $right ^= ($temp << 8);
		$temp = (($right >> 2)  ^ $left)  & 0x33333333; $left  ^= $temp; $right ^= ($temp << 2);
		$temp = (($left  >> 16) ^ $right) & 0x0000ffff; $right ^= $temp; $left  ^= ($temp << 16);
		$temp = (($left  >> 4)  ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left  ^= ($temp << 4);

		if ($mode == 1) {
			if ($encrypt) {
				$cbcleft  = $left;
				$cbcright = $right;
			} else {
				$left  ^= $cbcleft2;
				$right ^= $cbcright2;
			}
		}
		$tempresult .= pack('C*', (($left >> 24), (($left >> 16) & 0xff), (($left >> 8) & 0xff), ($left & 0xff), ($right >> 24), (($right >> 16) & 0xff), (($right >> 8) & 0xff), ($right & 0xff)));

		$chunk += 8;
		if ($chunk == 512) {
			$result .= $tempresult;
			$tempresult = '';
			$chunk = 0;
		}
	}

	return $result . $tempresult;
}

### キー作成(参考：http://www.tero.co.uk/des/code.php)
sub _create_deskeys {
	my $self = shift;
	my($key) = @_;

	use integer;

	my @pc2bytes0  = (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
	my @pc2bytes1  = (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
	my @pc2bytes2  = (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
	my @pc2bytes3  = (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
	my @pc2bytes4  = (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
	my @pc2bytes5  = (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
	my @pc2bytes6  = (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
	my @pc2bytes7  = (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
	my @pc2bytes8  = (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
	my @pc2bytes9  = (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
	my @pc2bytes10 = (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
	my @pc2bytes11 = (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
	my @pc2bytes12 = (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
	my @pc2bytes13 = (0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105);

	my $iterations = length($key) > 8 ? 3 : 1;
	my @keys; $#keys = (32 * $iterations);
	my @shifts = (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
	my($m, $n, $lefttemp, $righttemp, $left, $right, $temp) = (0, 0);

	for (my $j = 0; $j < $iterations; $j++) {
		$left  = (unpack('C',substr($key, $m++, 1)) << 24) | (unpack('C', substr($key, $m++, 1)) << 16) | (unpack('C', substr($key, $m++, 1)) << 8) | unpack('C', substr($key, $m++, 1));
		$right = (unpack('C',substr($key, $m++, 1)) << 24) | (unpack('C', substr($key, $m++, 1)) << 16) | (unpack('C', substr($key, $m++, 1)) << 8) | unpack('C', substr($key, $m++, 1));
 
		$temp = (($left  >> 4)  ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left  ^= ($temp << 4);
		$temp = (($right >> 16) ^ $left)  & 0x0000ffff; $left  ^= $temp; $right ^= ($temp << 16);
		$temp = (($left  >> 2)  ^ $right) & 0x33333333; $right ^= $temp; $left  ^= ($temp << 2);
		$temp = (($right >> 16) ^ $left)  & 0x0000ffff; $left  ^= $temp; $right ^= ($temp << 16);
		$temp = (($left  >> 1)  ^ $right) & 0x55555555; $right ^= $temp; $left  ^= ($temp << 1);
		$temp = (($right >> 8)  ^ $left)  & 0x00ff00ff; $left  ^= $temp; $right ^= ($temp << 8);
		$temp = (($left  >> 1)  ^ $right) & 0x55555555; $right ^= $temp; $left  ^= ($temp << 1);

		$temp  = ($left  << 8)  | (($right >> 20) & 0x000000f0);
		$left  = ($right << 24) | (($right << 8)  & 0xff0000) | (($right >> 8) & 0xff00) | (($right >> 24) & 0xf0);
		$right = $temp;

		for (my $i = 0; $i <= $#shifts; $i++) {
			if ($shifts[$i]) {
				no integer;
				$left  = ($left  << 2) | ($left  >> 26); 
				$right = ($right << 2) | ($right >> 26);

				use integer;
				$left  <<= 0;
				$right <<= 0;
			} else {
				no integer;
				$left  = ($left << 1)  | ($left >> 27); 
				$right = ($right << 1) | ($right >> 27);

				use integer;
				$left  <<= 0;
				$right <<= 0;
			}
			$left  &= 0xfffffff0;
			$right &= 0xfffffff0;

			$lefttemp = $pc2bytes0[$left >> 28] |
				$pc2bytes1[($left >> 24) & 0xf] |
				$pc2bytes2[($left >> 20) & 0xf] |
				$pc2bytes3[($left >> 16) & 0xf] |
				$pc2bytes4[($left >> 12) & 0xf] |
				$pc2bytes5[($left >> 8)  & 0xf] |
				$pc2bytes6[($left >> 4)  & 0xf];
			$righttemp = $pc2bytes7[$right >> 28] |
				$pc2bytes8[($right  >> 24) & 0xf] |
				$pc2bytes9[($right  >> 20) & 0xf] |
				$pc2bytes10[($right >> 16) & 0xf] |
				$pc2bytes11[($right >> 12) & 0xf] |
				$pc2bytes12[($right >> 8)  & 0xf] |
				$pc2bytes13[($right >> 4)  & 0xf];
			$temp = (($righttemp >> 16) ^ $lefttemp) & 0x0000ffff; 
			$keys[$n++] = $lefttemp  ^ $temp;
			$keys[$n++] = $righttemp ^ ($temp << 16);
		}
	}

	return @keys;
}

1;