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yubikey-val/AES128.php
Simon Josefsson a6e5837fb1 Make standalone.
2009-03-10 22:50:35 +00:00

962 lines
23 KiB
PHP
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<?php
require_once 'config.php';
/**
* AES128
*
* Encryption / Decryption data through AES 128
*
* Autor: José Manuel Busto López
* Version: 1.1
* Fecha: 04-05-2007
* Licencia: 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; either
* 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Based on official reference code by Paulo Bareto and Vincent Rijmen
*/
class AES128 {
/* Definition of S-box */
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);
/* Defining the S-box reverse (for decryption) */
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);
/* Defining the role of values rcon */
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);
/* Definition of 0x02*state[i][j] en GF(2^8) (para MixColumns)*/
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);
/* Definition of 0x03*state[i][j] en GF(2^8) (para MixColumns)*/
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);
/* Definition of 0x09*state[i][j] en GF(2^8) (para InvMixColumns)*/
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);
/* Definition of 0x0b*state[i][j] en GF(2^8)(para InvMixColumns)*/
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);
/* Definition of 0x0d*state[i][j] en GF(2^8) (para InvMixColumns)*/
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);
/* Definition of 0x0e*state[i][j] en GF(2^8) (para InvMixColumns)*/
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;//Número de rondas 128b=>10
var $Nb=4;//Número de columnas en el state (siempre 4)
var $Nk=4;//Longitud de la clave 128b=>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 $toHex=false;
//////////////////////////////////////////////////////////////////////////////
// Inner workings
/////////////////////////////////////////////////////////////////////////////
/**
* Realiza una XOR entre S-box y la clave i-esima rk.
*
* @param rk Array de caracteres (4x4) con la clave i-esima
*/
private function KeyAddition($rk) {
//Para cada ronda hacemos una XOR entre Sbox[i][j] y rk[round][i][j].
for($i = 0; $i < 4; $i++)
for($j = 0; $j < $this->Nb; $j++)
$this->state[$i][$j] ^= $rk[$i][$j];
}
/**
* Realiza las funciones SubBytes() y ShiftRow() como se define en fips-198
*
*/
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;
}
/**
* Realiza las funciones MixColumn() y KeyAddition() como se define en fips-198.
*
* @param rk Array de caracteres (4x4) con la clave i-esima
*/
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;
}
/**
* Realiza la funcion inversa de MixColumn()
*
*/
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;
}
/**
* Realiza la funcion inversa de SubBytes() y ShiftRow().
*
*/
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;
}
/////////////////////////////////////////////////////////////////////////
// Funciones de cifrado
/////////////////////////////////////////////////////////////////////////
/**
* Constructor class
*
* @param hex If true, returns values in hexadecimal
* @param If true, displays information for debug
*/
function __construct($hex=false, $debug=false){
$this->debug=$debug;
$this->toHex=$hex;
}
/**
* It creates the matrix encryption keys.
*
* @param hash: Encryption key length equal to 16 characters
* @return Matrix keys to encrypt / decrypt.
*/
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 $rk;
}
/**
* Realiza del cifrado de 1 bloque de datos (128 bits).
*
* @param in Datos a cifrar (longitud 128 bits).
* @param keyin Array de claves de cifrado (generadas con makeKey())
* @return La cadena de datos cifrada.
*/
public function blockEncrypt($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->showInt("Cifrado: <br/> State Inicial");
$this->KeyAddition($key[0]);
$this->showInt("Ronda 0 :: KeyAddition");
for($r = 1; $r < $this->Nr; $r++) {
$this->ByteSubShiftRow();
$this->showInt("Ronda $r :: ByteSubShiftRow");
$this->MixColumnKeyAddition($key[$r]);
$this->showInt("Ronda $r :: MixColumnKeyAddition");
}
$this->ByteSubShiftRow();
$this->showInt("Ronda final :: ByteSubShiftRow");
$this->KeyAddition($key[$this->Nr]);
$this->showInt("Ronda final :: KeyAddition ==> Resultado");
$out="";
for($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 $out;
}
/**
* Realiza el descifrado de 1 bloque de datos (128 bits).
*
* @param in Datos a descifrar (longitud 128 bits).
* @param keyin Array de claves de cifrado (generadas con makeKey())
* @return La cadena de datos descifrada.
*/
public function blockDecrypt($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->showInt("Descifrado: <br/> State Inicial");
$this->KeyAddition($key[$this->Nr]);
$this->showInt("Ronda 0 :: KeyAddition");
for($r = $this->Nr-1; $r > 0; $r--) {
$this->InvShiftRowInvByteSub();
$this->showInt("Ronda ". ($this->Nr - $r)." :: InvShiftRowInvByteSub");
$this->KeyAddition($key[$r]);
$this->showInt("Ronda ".($this->Nr - $r)." :: KeyAddition");
$this->InvMixColumn();
$this->showInt("Ronda ".($this->Nr - $r)." :: InvMiColumn");
}
$this->InvShiftRowInvByteSub();
$this->showInt("Ronda final :: InvShiftRowInvByteSub");
$this->KeyAddition($key[0]);
$this->showInt("Ronda final :: KeyAddition ==> Resultado");
$out="";
for($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;
}
//
//////////////////////// ML end
////////////////////////////////////////////////////////////////////////
//Funcion de test
////////////////////////////////////////////////////////////////////////
/**
* Realiza un auto-test.
*
*
*/
public function self_test(){
$hash="";
$in="";
for ($i = 0; $i < 16; $i++){
$hash .= chr($i);
}
$in .= chr(0x00);
$in .= chr(0x11);
$in .= chr(0x22);
$in .= chr(0x33);
$in .= chr(0x44);
$in .= chr(0x55);
$in .= chr(0x66);
$in .= chr(0x77);
$in .= chr(0x88);
$in .= chr(0x99);
$in .= chr(0xaa);
$in .= chr(0xbb);
$in .= chr(0xcc);
$in .= chr(0xdd);
$in .= chr(0xee);
$in .= chr(0xff);
echo("===============================<br/>");
echo("KEYSIZE= 128 bits<br/>");
echo("KEY= 0x".$this->toHexString($hash)."<br/>");
echo("Plaintext= 0x".$this->toHexString($in)."<br/>");
$key = $this->makeKey($hash);
$ct = $this->blockEncrypt($in, $key);
echo("Ciphertext= 0x".$this->toHexString($ct)."<br/>");
$cpt = $this->blockDecrypt($ct, $key);
echo ("Descifrado= 0x".$this->toHexString($cpt)."<br/>");
if(!strcmp($cpt,$in)){
if(!$this->debug){
$start=microtime(true);
for($i=0; $i<1024; $i++){
$cpt = $this->blockEncrypt($ct, $key);
}
$end=(microtime(true)-$start)*1000;
echo("Tiempo cifrado 16 KB (1024 bloques): ".$end." ms<br/>");
}
echo("Cifrado de 128 bits correcto<br/>");
} else echo("Ha fallado el cifrado de 128 bits");
}
///////////////////////////////////////////////////////////////////////
//Funciones auxiliares
//////////////////////////////////////////////////////////////////////
public function toHexString ($sa) {
$buf="";
for ($i=0; $i<strlen($sa); $i++){
$val=dechex(ord($sa{$i}));
if(strlen($val)< 2) $val="0".$val;
$buf.=$val;
}
return $buf;
}
public function fromHexString($sa){
$buf="";
for($i=0; $i<strlen($sa); $i=$i+2){
$val=chr(hexdec(substr($sa, $i, 2)));
$buf.=$val;
}
return $buf;
}
private function showInt($texto){
if($this->debug){
echo($texto.": ");
for($i=0; $i<4; $i++){
for($j=0; $j<4; $j++){
echo(dechex($this->state[$j][$i])." ");
}
}
echo ("<br/>");
}
}
}
?>
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