Location: PHPKode > scripts > AES 128 2-way encryption library > aes-128-2-way-encryption-library/aes128.php
<?PHP

/*
 * AES128 encryption/decription library
 *
 *
 * Author: Justin silverton (hide@address.com) http://www.rawseo.com
 * Version: 1.2
 * Date modified: 05-04-2009
 * License: Lesser General Public License (LGPL)
 *
 * Copyright (C) 2007  José Manuel Busto López
 * This library 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; eithe
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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.
 * 
 * Based on official reference code by Paulo Bareto and Vincent Rijmen
 */

 


class aes128 {



    var $S = array(



		99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 



		118, 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 



		114, 192, 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 



		216, 49, 21, 4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 



		235, 39, 178, 117, 9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214,



		179, 41, 227, 47, 132, 83, 209, 0, 237, 32, 252, 177, 91, 106, 203,



		190, 57, 74, 76, 88, 207, 208, 239, 170, 251, 67, 77, 51, 133, 69,



		249, 2, 127, 80, 60, 159, 168, 81, 163, 64, 143, 146, 157, 56, 245, 



		188, 182, 218, 33, 16, 255, 243, 210, 205, 12, 19, 236, 95, 151, 68,



		23, 196, 167, 126, 61, 100, 93, 25, 115, 96, 129, 79, 220, 34, 42,



		144, 136, 70, 238, 184, 20, 222, 94, 11, 219, 224, 50, 58, 10, 73,



		6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121, 231, 200, 55, 109,



		141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8, 186, 120, 37,



		46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138, 112, 62,



		181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158, 225,



		248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223,



    	140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22);



    
    var $Si = array(



		82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215,



		251, 124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222,



		233, 203, 84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66,



		250, 195, 78, 8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109,



		139, 209, 37, 114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204,



    	93, 101, 182, 146, 108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87,



		167, 141, 157, 132, 144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5,



		184, 179, 69, 6, 208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1,



		19, 138, 107, 58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240,



		180, 230, 115, 150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232,



		28, 117, 223, 110, 71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14,



	    170, 24, 190, 27, 252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254,



		120, 205, 90, 244, 31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39,



		128, 236, 95, 96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147,



		201, 156, 239, 160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60,



		131, 83, 153, 97, 23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85,



		33, 12, 125);



    var $rcon = array (



		0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,



    	0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4,



    	0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91);



    var $T2 = array( 



        0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 



        32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 



        62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 



        92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 



        122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 



        152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 



        182, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 



        212, 214, 216, 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 



        242, 244, 246, 248, 250, 252, 254, 27, 25, 31, 29, 19, 17, 23, 21, 



        11, 9, 15, 13, 3, 1, 7, 5, 59, 57, 63, 61, 51, 49, 55, 



        53, 43, 41, 47, 45, 35, 33, 39, 37, 91, 89, 95, 93, 83, 81, 



        87, 85, 75, 73, 79, 77, 67, 65, 71, 69, 123, 121, 127, 125, 115, 



        113, 119, 117, 107, 105, 111, 109, 99, 97, 103, 101, 155, 153, 159, 157, 



        147, 145, 151, 149, 139, 137, 143, 141, 131, 129, 135, 133, 187, 185, 191, 



        189, 179, 177, 183, 181, 171, 169, 175, 173, 163, 161, 167, 165, 219, 217, 



        223, 221, 211, 209, 215, 213, 203, 201, 207, 205, 195, 193, 199, 197, 251, 



        249, 255, 253, 243, 241, 247, 245, 235, 233, 239, 237, 227, 225, 231, 229);



    var $T3 = array( 



        0, 3, 6, 5, 12, 15, 10, 9, 24, 27, 30, 29, 20, 23, 18, 17, 



        48, 51, 54, 53, 60, 63, 58, 57, 40, 43, 46, 45, 36, 39, 34, 



        33, 96, 99, 102, 101, 108, 111, 106, 105, 120, 123, 126, 125, 116, 119, 



        114, 113, 80, 83, 86, 85, 92, 95, 90, 89, 72, 75, 78, 77, 68, 



        71, 66, 65, 192, 195, 198, 197, 204, 207, 202, 201, 216, 219, 222, 221, 



        212, 215, 210, 209, 240, 243, 246, 245, 252, 255, 250, 249, 232, 235, 238, 



        237, 228, 231, 226, 225, 160, 163, 166, 165, 172, 175, 170, 169, 184, 187, 



        190, 189, 180, 183, 178, 177, 144, 147, 150, 149, 156, 159, 154, 153, 136, 



        139, 142, 141, 132, 135, 130, 129, 155, 152, 157, 158, 151, 148, 145, 146, 



        131, 128, 133, 134, 143, 140, 137, 138, 171, 168, 173, 174, 167, 164, 161, 



        162, 179, 176, 181, 182, 191, 188, 185, 186, 251, 248, 253, 254, 247, 244, 



        241, 242, 227, 224, 229, 230, 239, 236, 233, 234, 203, 200, 205, 206, 199, 



        196, 193, 194, 211, 208, 213, 214, 223, 220, 217, 218, 91, 88, 93, 94, 



        87, 84, 81, 82, 67, 64, 69, 70, 79, 76, 73, 74, 107, 104, 109, 



        110, 103, 100, 97, 98, 115, 112, 117, 118, 127, 124, 121, 122, 59, 56, 



        61, 62, 55, 52, 49, 50, 35, 32, 37, 38, 47, 44, 41, 42, 11, 



        8, 13, 14, 7, 4, 1, 2, 19, 16, 21, 22, 31, 28, 25, 26);



    var $T9 = array( 



        0, 9, 18, 27, 36, 45, 54, 63, 72, 65, 90, 83, 108, 101, 126, 119, 



        144, 153, 130, 139, 180, 189, 166, 175, 216, 209, 202, 195, 252, 245, 238, 



        231, 59, 50, 41, 32, 31, 22, 13, 4, 115, 122, 97, 104, 87, 94, 



        69, 76, 171, 162, 185, 176, 143, 134, 157, 148, 227, 234, 241, 248, 199, 



        206, 213, 220, 118, 127, 100, 109, 82, 91, 64, 73, 62, 55, 44, 37, 



        26, 19, 8, 1, 230, 239, 244, 253, 194, 203, 208, 217, 174, 167, 188, 



        181, 138, 131, 152, 145, 77, 68, 95, 86, 105, 96, 123, 114, 5, 12, 



        23, 30, 33, 40, 51, 58, 221, 212, 207, 198, 249, 240, 235, 226, 149, 



        156, 135, 142, 177, 184, 163, 170, 236, 229, 254, 247, 200, 193, 218, 211, 



        164, 173, 182, 191, 128, 137, 146, 155, 124, 117, 110, 103, 88, 81, 74, 



        67, 52, 61, 38, 47, 16, 25, 2, 11, 215, 222, 197, 204, 243, 250, 



        225, 232, 159, 150, 141, 132, 187, 178, 169, 160, 71, 78, 85, 92, 99, 



        106, 113, 120, 15, 6, 29, 20, 43, 34, 57, 48, 154, 147, 136, 129, 



        190, 183, 172, 165, 210, 219, 192, 201, 246, 255, 228, 237, 10, 3, 24, 



        17, 46, 39, 60, 53, 66, 75, 80, 89, 102, 111, 116, 125, 161, 168, 



        179, 186, 133, 140, 151, 158, 233, 224, 251, 242, 205, 196, 223, 214, 49, 



        56, 35, 42, 21, 28, 7, 14, 121, 112, 107, 98, 93, 84, 79, 70);



    var $T11 = array( 



        0, 11, 22, 29, 44, 39, 58, 49, 88, 83, 78, 69, 116, 127, 98, 105, 



        176, 187, 166, 173, 156, 151, 138, 129, 232, 227, 254, 245, 196, 207, 210, 



        217, 123, 112, 109, 102, 87, 92, 65, 74, 35, 40, 53, 62, 15, 4, 



        25, 18, 203, 192, 221, 214, 231, 236, 241, 250, 147, 152, 133, 142, 191, 



        180, 169, 162, 246, 253, 224, 235, 218, 209, 204, 199, 174, 165, 184, 179, 



        130, 137, 148, 159, 70, 77, 80, 91, 106, 97, 124, 119, 30, 21, 8, 



        3, 50, 57, 36, 47, 141, 134, 155, 144, 161, 170, 183, 188, 213, 222, 



        195, 200, 249, 242, 239, 228, 61, 54, 43, 32, 17, 26, 7, 12, 101, 



        110, 115, 120, 73, 66, 95, 84, 247, 252, 225, 234, 219, 208, 205, 198, 



        175, 164, 185, 178, 131, 136, 149, 158, 71, 76, 81, 90, 107, 96, 125, 



        118, 31, 20, 9, 2, 51, 56, 37, 46, 140, 135, 154, 145, 160, 171, 



        182, 189, 212, 223, 194, 201, 248, 243, 238, 229, 60, 55, 42, 33, 16, 



        27, 6, 13, 100, 111, 114, 121, 72, 67, 94, 85, 1, 10, 23, 28, 



        45, 38, 59, 48, 89, 82, 79, 68, 117, 126, 99, 104, 177, 186, 167, 



        172, 157, 150, 139, 128, 233, 226, 255, 244, 197, 206, 211, 216, 122, 113, 



        108, 103, 86, 93, 64, 75, 34, 41, 52, 63, 14, 5, 24, 19, 202, 



        193, 220, 215, 230, 237, 240, 251, 146, 153, 132, 143, 190, 181, 168, 163);



    var $T13 = array( 



        0, 13, 26, 23, 52, 57, 46, 35, 104, 101, 114, 127, 92, 81, 70, 75, 



        208, 221, 202, 199, 228, 233, 254, 243, 184, 181, 162, 175, 140, 129, 150, 



        155, 187, 182, 161, 172, 143, 130, 149, 152, 211, 222, 201, 196, 231, 234, 



        253, 240, 107, 102, 113, 124, 95, 82, 69, 72, 3, 14, 25, 20, 55, 



        58, 45, 32, 109, 96, 119, 122, 89, 84, 67, 78, 5, 8, 31, 18, 



        49, 60, 43, 38, 189, 176, 167, 170, 137, 132, 147, 158, 213, 216, 207, 



        194, 225, 236, 251, 246, 214, 219, 204, 193, 226, 239, 248, 245, 190, 179, 



        164, 169, 138, 135, 144, 157, 6, 11, 28, 17, 50, 63, 40, 37, 110, 



        99, 116, 121, 90, 87, 64, 77, 218, 215, 192, 205, 238, 227, 244, 249, 



        178, 191, 168, 165, 134, 139, 156, 145, 10, 7, 16, 29, 62, 51, 36, 



        41, 98, 111, 120, 117, 86, 91, 76, 65, 97, 108, 123, 118, 85, 88, 



        79, 66, 9, 4, 19, 30, 61, 48, 39, 42, 177, 188, 171, 166, 133, 



        136, 159, 146, 217, 212, 195, 206, 237, 224, 247, 250, 183, 186, 173, 160, 



        131, 142, 153, 148, 223, 210, 197, 200, 235, 230, 241, 252, 103, 106, 125, 



        112, 83, 94, 73, 68, 15, 2, 21, 24, 59, 54, 33, 44, 12, 1, 



        22, 27, 56, 53, 34, 47, 100, 105, 126, 115, 80, 93, 74, 71, 220, 



        209, 198, 203, 232, 229, 242, 255, 180, 185, 174, 163, 128, 141, 154, 151);



    var $T14 = array ( 



        0, 14, 28, 18, 56, 54, 36, 42, 112, 126, 108, 98, 72, 70, 84, 90, 



        224, 238, 252, 242, 216, 214, 196, 202, 144, 158, 140, 130, 168, 166, 180, 



        186, 219, 213, 199, 201, 227, 237, 255, 241, 171, 165, 183, 185, 147, 157, 



        143, 129, 59, 53, 39, 41, 3, 13, 31, 17, 75, 69, 87, 89, 115, 



        125, 111, 97, 173, 163, 177, 191, 149, 155, 137, 135, 221, 211, 193, 207, 



        229, 235, 249, 247, 77, 67, 81, 95, 117, 123, 105, 103, 61, 51, 33, 



        47, 5, 11, 25, 23, 118, 120, 106, 100, 78, 64, 82, 92, 6, 8, 



        26, 20, 62, 48, 34, 44, 150, 152, 138, 132, 174, 160, 178, 188, 230, 



        232, 250, 244, 222, 208, 194, 204, 65, 79, 93, 83, 121, 119, 101, 107, 



        49, 63, 45, 35, 9, 7, 21, 27, 161, 175, 189, 179, 153, 151, 133, 



        139, 209, 223, 205, 195, 233, 231, 245, 251, 154, 148, 134, 136, 162, 172, 



        190, 176, 234, 228, 246, 248, 210, 220, 206, 192, 122, 116, 102, 104, 66, 



        76, 94, 80, 10, 4, 22, 24, 50, 60, 46, 32, 236, 226, 240, 254, 



        212, 218, 200, 198, 156, 146, 128, 142, 164, 170, 184, 182, 12, 2, 16, 



        30, 52, 58, 40, 38, 124, 114, 96, 110, 68, 74, 88, 86, 55, 57, 



        43, 37, 15, 1, 19, 29, 71, 73, 91, 85, 127, 113, 99, 109, 215, 



        217, 203, 197, 239, 225, 243, 253, 167, 169, 187, 181, 159, 145, 131, 141);



    



    var $Nr=10;


    var $Nb=4;


    var $Nk=4;


    var $state=array(array());



    var $shifts_r=array(array(0, 1, 2, 3),array(3, 0, 1, 2),array(2, 3, 0, 1),array(1, 2, 3, 0));



    var $shifts_l=array(array(0, 1, 2, 3),array(1, 2, 3, 0),array(2, 3, 0, 1),array(3, 0, 1, 2));



    var $debug=false;



    var $toHex=false;




    
	private function KeyAddition($rk) {




       for($i = 0; $i < 4; $i++)



            for($j = 0; $j < $this->Nb; $j++)



                $this->state[$i][$j] ^= $rk[$i][$j];



    }



    


    private function ByteSubShiftRow(){



        $tmp= array(array());



        for($i = 0; $i < 4; $i++)



            for($j = 0; $j < $this->Nb; $j++)                



                $tmp[$i][$this->shifts_r[$i][$j]]= $this->S[$this->state[$i][$j]];



        $this->state=$tmp;



    }



    private function MixColumnKeyAddition($rk){



        $b= array(array());



        for($j = 0; $j < 4; $j++)



            for($i = 0; $i < $this->Nb; $i++){



                $b[$i][$j] = $this->T2[$this->state[$i][$j]] ^  $this->T3[$this->state[($i + 1) % 4][$j]] ^ $this->state[($i + 2) % 4][$j] ^ $this->state[($i + 3) % 4][$j];



                $b[$i][$j]^=$rk[$i][$j];



            }



        $this->state = $b;



    }



    private function InvMixColumn() {



        $b= array(array());



        for($j = 0; $j < 4; $j++)



            for($i = 0; $i < $this->Nb; $i++)



                $b[$i][$j] = $this->T14[$this->state[$i][$j]] ^ $this->T11[$this->state[($i + 1) % 4][$j]] ^ $this->T13[$this->state[($i + 2) % 4][$j]] ^ $this->T9[$this->state[($i + 3) % 4][$j]];



         $this->state = $b;



    }



    private function InvShiftRowInvByteSub(){        



        $tmp= array(array());



        for($i = 0; $i < 4; $i++)



            for($j = 0; $j < $this->Nb; $j++)



                $tmp[$i][$this->shifts_l[$i][$j]]= $this->Si[$this->state[$i][$j]];



        $this->state=$tmp;



    }  



    function __construct($hex=false, $debug=false){



      $this->debug=$debug;



      $this->toHex=$hex;	  



	}



    public function makeKey($hash){



        $rconpocharer = 0;



        $tk=array(array());;



        $rk=array(array(array()));



        for($j = 0; $j < $this->Nk; $j++)



            for($i = 0; $i < 4; $i++)



                $tk[$i][$j] = ord($hash{$j*4+$i})>256 ? ord($hash{$j*4+$i})%256 : ord($hash{$j*4+$i});



        $t = 0;



        



        for($j = 0; ($j < $this->Nk) && ($t < ($this->Nr+1)*$this->Nb); $j++, $t++)



            for($i = 0; $i < 4; $i++)



                $rk[$t / $this->Nb][$i][$t % $this->Nb] = $tk[$i][$j];



        while ($t < ($this->Nr+1)*$this->Nb) {



            



            for($i = 0; $i < 4; $i++) 



                $tk[$i][0] ^= $this->S[$tk[($i+1)%4][$this->Nk-1]];



            $tk[0][0] ^= $this->rcon[$rconpocharer++];



            for($j = 1; $j < $this->Nk; $j++)



                for($i = 0; $i < 4; $i++){



                     $tk[$i][$j] ^= $tk[$i][$j-1];



                }



            for($j = 0; ($j < $this->Nk) && ($t < ($this->Nr+1)*$this->Nb); $j++, $t++)



                for($i = 0; $i < 4; $i++) {



                    $rk[$t / $this->Nb][$i][$t % $this->Nb] = $tk[$i][$j];



                }



        }



        return $rk;



    }



    

    public function blockEncrypt($in, $key){



        



        for ($i=0; $i<4; $i++){



            for ($j=0; $j<$this->Nb; $j++){



                $this->state[$j][$i]=ord($in{$i*4+$j});



            }



        }




        $this->KeyAddition($key[0]);



        for($r = 1; $r < $this->Nr; $r++) {



            $this->ByteSubShiftRow();



            $this->MixColumnKeyAddition($key[$r]);



         }



        $this->ByteSubShiftRow();




        $this->KeyAddition($key[$this->Nr]);




        $out="";



        for($i=0; $i<4; $i++)



          for ($j=0; $j<4; $j++)



            $out.=chr($this->state[$j][$i]);



        if($this->toHex){



		  $out=$this->toHexString($out);



		}  



        return $out;



    }



    public function blockDecrypt($in, $key) {



        



        for ($i=0; $i<4; $i++){



            for ($j=0; $j<$this->Nb; $j++){



                $this->state[$j][$i]=ord($in{$i*4+$j});



            }



        }


      



        $this->KeyAddition($key[$this->Nr]);



        for($r = $this->Nr-1; $r > 0; $r--) {



            $this->InvShiftRowInvByteSub();



            $this->KeyAddition($key[$r]);




            $this->InvMixColumn();

         }



        $this->InvShiftRowInvByteSub();  




        $this->KeyAddition($key[0]);



        $out="";



        for($i=0; $i<4; $i++)



          for ($j=0; $j<4; $j++)



            $out.=chr($this->state[$j][$i]);  



        if($this->toHex){



		  $out=$this->toHexString($out);



		}            



        return trim($out);



    }

 
    

    private function toHexString ($sa) {



      $buf="";



      for ($i=0; $i<strlen($sa); $i++){



        $val=dechex(ord($sa{$i}));	    



        if(strlen($val)< 2) $val="0".$val;



        $buf.=$val;



	  }



	  return $buf;



    }    



    



    private function fromHexString($sa){



	  $buf="";



	  for($i=0; $i<strlen($sa); $i=$i+2){



	    $val=chr(hexdec(substr($sa, $i, 2)));



	    $buf.=$val;



	  }



	  return $buf;



	}

}



?>
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