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<?php |
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namespace Encryption\Crypt; |
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
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/* AES counter (CTR) mode implementation in PHP (c) Chris Veness 2005-2010. Right of free use is */ |
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/* granted for all commercial or non-commercial use under CC-BY licence. No warranty of any */ |
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/* form is offered. */ |
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
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class Aes |
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{ |
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/** |
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* AES Cipher function: encrypt 'input' with Rijndael algorithm |
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* |
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* @param $input message as byte-array (16 bytes) |
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* @param $w key schedule as 2D byte-array (Nr+1 x Nb bytes) - |
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* generated from the cipher key by keyExpansion() |
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* @return $ciphertext as byte-array (16 bytes) |
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*/ |
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public static function cipher($input, $w) |
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{ |
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// main cipher function [é5.1] |
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$Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES) |
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$Nr = count($w) / $Nb - 1; // no of rounds: 10/12/14 for 128/192/256-bit keys |
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$state = array(); // initialise 4xNb byte-array 'state' with input [é3.4] |
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for ($i = 0; $i < 4 * $Nb; $i++) { |
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$state[$i % 4][floor($i / 4)] = $input[$i]; |
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} |
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$state = self::addRoundKey($state, $w, 0, $Nb); |
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for ($round = 1; $round < $Nr; $round++) { // apply Nr rounds |
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$state = self::subBytes($state, $Nb); |
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$state = self::shiftRows($state, $Nb); |
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$state = self::mixColumns($state, $Nb); |
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$state = self::addRoundKey($state, $w, $round, $Nb); |
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} |
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$state = self::subBytes($state, $Nb); |
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$state = self::shiftRows($state, $Nb); |
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$state = self::addRoundKey($state, $w, $Nr, $Nb); |
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$output = array(4 * $Nb); // convert state to 1-d array before returning [é3.4] |
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for ($i = 0; $i < 4 * $Nb; $i++) { |
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$output[$i] = $state[$i % 4][floor($i / 4)]; |
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} |
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return $output; |
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} |
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/** |
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* @param integer $rnd |
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* @param integer $Nb |
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*/ |
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private static function addRoundKey($state, $w, $rnd, $Nb) |
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{ |
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// xor Round Key into state S [é5.1.4] |
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for ($r = 0; $r < 4; $r++) { |
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for ($c = 0; $c < $Nb; $c++) { |
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$state[$r][$c] ^= $w[$rnd * 4 + $c][$r]; |
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} |
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} |
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return $state; |
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} |
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/** |
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* @param integer $Nb |
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*/ |
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private static function subBytes($s, $Nb) |
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{ |
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// apply SBox to state S [é5.1.1] |
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for ($r = 0; $r < 4; $r++) { |
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for ($c = 0; $c < $Nb; $c++) { |
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$s[$r][$c] = self::$sBox[$s[$r][$c]]; |
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} |
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} |
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return $s; |
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} |
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/** |
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* @param integer $Nb |
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*/ |
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private static function shiftRows($s, $Nb) |
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{ |
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// shift row r of state S left by r bytes [é5.1.2] |
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$t = array(4); |
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for ($r = 1; $r < 4; $r++) { |
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for ($c = 0; $c < 4; $c++) { |
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$t[$c] = $s[$r][($c + $r) % $Nb]; // shift into temp copy |
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} |
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for ($c = 0; $c < 4; $c++) { |
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$s[$r][$c] = $t[$c]; // and copy back |
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} |
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} // note that this will work for Nb=4,5,6, but not 7,8 (always 4 for AES): |
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return $s; // see fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.311.pdf |
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} |
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/** |
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* @param integer $Nb |
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*/ |
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private static function mixColumns($s, $Nb) |
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{ |
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// combine bytes of each col of state S [é5.1.3] |
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for ($c = 0; $c < 4; $c++) { |
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$a = array(4); // 'a' is a copy of the current column from 's' |
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$b = array(4); // 'b' is aé{02} in GF(2^8) |
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for ($i = 0; $i < 4; $i++) { |
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$a[$i] = $s[$i][$c]; |
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$b[$i] = $s[$i][$c] & 0x80 ? $s[$i][$c] << 1 ^ 0x011b : $s[$i][$c] << 1; |
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} |
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// a[n] ^ b[n] is aé{03} in GF(2^8) |
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$s[0][$c] = $b[0] ^ $a[1] ^ $b[1] ^ $a[2] ^ $a[3]; // 2*a0 + 3*a1 + a2 + a3 |
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$s[1][$c] = $a[0] ^ $b[1] ^ $a[2] ^ $b[2] ^ $a[3]; // a0 * 2*a1 + 3*a2 + a3 |
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$s[2][$c] = $a[0] ^ $a[1] ^ $b[2] ^ $a[3] ^ $b[3]; // a0 + a1 + 2*a2 + 3*a3 |
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$s[3][$c] = $a[0] ^ $b[0] ^ $a[1] ^ $a[2] ^ $b[3]; // 3*a0 + a1 + a2 + 2*a3 |
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} |
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return $s; |
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} |
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/** |
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* Key expansion for Rijndael cipher(): performs key expansion on cipher key |
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* to generate a key schedule |
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* |
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* @param $key cipher key byte-array (16 bytes) |
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* @return $key schedule as 2D byte-array (Nr+1 x Nb bytes) |
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*/ |
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public static function keyExpansion($key) |
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{ |
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// generate Key Schedule from Cipher Key [é5.2] |
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$Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES) |
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$Nk = count($key) / 4; // key length (in words): 4/6/8 for 128/192/256-bit keys |
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$Nr = $Nk + 6; // no of rounds: 10/12/14 for 128/192/256-bit keys |
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$w = array(); |
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$temp = array(); |
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for ($i = 0; $i < $Nk; $i++) { |
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$r = array($key[4 * $i], $key[4 * $i + 1], $key[4 * $i + 2], $key[4 * $i + 3]); |
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$w[$i] = $r; |
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} |
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for ($i = $Nk; $i < ($Nb * ($Nr + 1)); $i++) { |
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$w[$i] = array(); |
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for ($t = 0; $t < 4; $t++) { |
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$temp[$t] = $w[$i - 1][$t]; |
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} |
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if ($i % $Nk == 0) { |
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$temp = self::subWord(self::rotWord($temp)); |
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for ($t = 0; $t < 4; $t++) { |
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$temp[$t] ^= self::$rCon[$i / $Nk][$t]; |
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} |
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} elseif ($Nk > 6 && $i % $Nk == 4) { |
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$temp = self::subWord($temp); |
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} |
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for ($t = 0; $t < 4; $t++) { |
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$w[$i][$t] = $w[$i - $Nk][$t] ^ $temp[$t]; |
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} |
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} |
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return $w; |
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} |
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private static function subWord($w) |
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{ |
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// apply SBox to 4-byte word w |
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for ($i = 0; $i < 4; $i++) { |
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$w[$i] = self::$sBox[$w[$i]]; |
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} |
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return $w; |
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} |
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private static function rotWord($w) |
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{ |
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// rotate 4-byte word w left by one byte |
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$tmp = $w[0]; |
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for ($i = 0; $i < 3; $i++) { |
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$w[$i] = $w[$i + 1]; |
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} |
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$w[3] = $tmp; |
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return $w; |
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} |
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// sBox is pre-computed multiplicative inverse in GF(2^8) used in subBytes and keyExpansion [é5.1.1] |
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private static $sBox = array( |
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0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, |
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0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, |
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0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, |
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0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, |
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0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, |
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0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, |
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0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, |
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0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, |
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199
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0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, |
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200
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0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, |
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201
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0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, |
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202
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0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, |
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203
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0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, |
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204
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0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, |
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205
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0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, |
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206
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0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 |
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); |
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// rCon is Round Constant used for the Key Expansion [1st col is 2^(r-1) in GF(2^8)] [é5.2] |
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private static $rCon = array( |
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array(0x00, 0x00, 0x00, 0x00), |
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array(0x01, 0x00, 0x00, 0x00), |
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array(0x02, 0x00, 0x00, 0x00), |
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array(0x04, 0x00, 0x00, 0x00), |
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array(0x08, 0x00, 0x00, 0x00), |
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216
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array(0x10, 0x00, 0x00, 0x00), |
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217
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array(0x20, 0x00, 0x00, 0x00), |
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array(0x40, 0x00, 0x00, 0x00), |
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array(0x80, 0x00, 0x00, 0x00), |
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220
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array(0x1b, 0x00, 0x00, 0x00), |
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array(0x36, 0x00, 0x00, 0x00) |
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222
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); |
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224
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} |
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class aesctr extends Aes |
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{ |
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/** |
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* Encrypt a text using AES encryption in Counter mode of operation |
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* - see http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf |
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* |
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* Unicode multi-byte character safe |
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* |
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* @param $plaintext string text to be encrypted |
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* @param $password the password to use to generate a key |
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* @param $nBits integer of bits to be used in the key (128, 192, or 256) |
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* @return string text |
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*/ |
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public static function encrypt($plaintext, $password, $nBits) |
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{ |
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$blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES |
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if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) { |
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return ''; // standard allows 128/192/256 bit keys |
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} |
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// note PHP (5) gives us plaintext and password in UTF8 encoding! |
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// use AES itself to encrypt password to get cipher key (using plain password as source for |
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249
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// key expansion) - gives us well encrypted key |
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250
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$nBytes = $nBits / 8; // no bytes in key |
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251
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$pwBytes = array(); |
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252
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for ($i = 0; $i < $nBytes; $i++) { |
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253
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$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff; |
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254
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} |
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255
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$key = Aes::cipher($pwBytes, Aes::keyExpansion($pwBytes)); |
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256
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$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long |
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257
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258
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// initialise counter block (NIST SP800-38A §B.2): millisecond time-stamp for nonce in |
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// 1st 8 bytes, block counter in 2nd 8 bytes |
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260
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$counterBlock = array(); |
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261
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$nonce = floor(microtime(true) * 1000); // timestamp: milliseconds since 1-Jan-1970 |
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262
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$nonceSec = floor($nonce / 1000); |
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263
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$nonceMs = $nonce % 1000; |
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264
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// encode nonce with seconds in 1st 4 bytes, and (repeated) ms part filling 2nd 4 bytes |
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265
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for ($i = 0; $i < 4; $i++) { |
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266
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$counterBlock[$i] = self::urs($nonceSec, $i * 8) & 0xff; |
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267
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} |
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268
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for ($i = 0; $i < 4; $i++) { |
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269
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$counterBlock[$i + 4] = $nonceMs & 0xff; |
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} |
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271
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// and convert it to a string to go on the front of the ciphertext |
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272
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$ctrTxt = ''; |
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273
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for ($i = 0; $i < 8; $i++) { |
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274
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$ctrTxt .= chr($counterBlock[$i]); |
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275
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} |
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276
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|
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|
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277
|
|
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// generate key schedule - an expansion of the key into distinct Key Rounds for each round |
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278
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$keySchedule = Aes::keyExpansion($key); |
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279
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|
|
280
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$blockCount = ceil(strlen($plaintext) / $blockSize); |
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281
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$ciphertxt = array(); // ciphertext as array of strings |
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282
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283
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for ($b = 0; $b < $blockCount; $b++) { |
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284
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// set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes) |
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285
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|
|
// done in two stages for 32-bit ops: using two words allows us to go past 2^32 blocks (68GB) |
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286
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|
for ($c = 0; $c < 4; $c++) { |
|
287
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|
$counterBlock[15 - $c] = self::urs($b, $c * 8) & 0xff; |
|
288
|
|
|
} |
|
289
|
|
|
for ($c = 0; $c < 4; $c++) { |
|
290
|
|
|
$counterBlock[15 - $c - 4] = self::urs($b / 0x100000000, $c * 8); |
|
291
|
|
|
} |
|
292
|
|
|
|
|
293
|
|
|
$cipherCntr = Aes::cipher($counterBlock, $keySchedule); // -- encrypt counter block -- |
|
294
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|
|
295
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|
|
// block size is reduced on final block |
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296
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|
|
$blockLength = $b < $blockCount - 1 ? $blockSize : (strlen($plaintext) - 1) % $blockSize + 1; |
|
297
|
|
|
$cipherByte = array(); |
|
298
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|
|
|
|
299
|
|
|
for ($i = 0; $i < $blockLength; $i++) { // -- xor plaintext with ciphered counter byte-by-byte -- |
|
300
|
|
|
$cipherByte[$i] = $cipherCntr[$i] ^ ord(substr($plaintext, $b * $blockSize + $i, 1)); |
|
301
|
|
|
$cipherByte[$i] = chr($cipherByte[$i]); |
|
302
|
|
|
} |
|
303
|
|
|
$ciphertxt[$b] = implode('', $cipherByte); // escape troublesome characters in ciphertext |
|
304
|
|
|
} |
|
305
|
|
|
|
|
306
|
|
|
// implode is more efficient than repeated string concatenation |
|
307
|
|
|
$ciphertext = $ctrTxt.implode('', $ciphertxt); |
|
308
|
|
|
$ciphertext = base64_encode($ciphertext); |
|
309
|
|
|
|
|
310
|
|
|
return $ciphertext; |
|
311
|
|
|
} |
|
312
|
|
|
|
|
313
|
|
|
/** |
|
314
|
|
|
* Decrypt a text encrypted by AES in counter mode of operation |
|
315
|
|
|
* |
|
316
|
|
|
* @param $ciphertext source text to be decrypted |
|
|
|
|
|
|
317
|
|
|
* @param $password the password to use to generate a key |
|
318
|
|
|
* @param $nBits integer of bits to be used in the key (128, 192, or 256) |
|
319
|
|
|
* @return string text |
|
320
|
|
|
*/ |
|
321
|
|
|
public static function decrypt($ciphertext, $password, $nBits) |
|
322
|
|
|
{ |
|
323
|
|
|
$blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES |
|
324
|
|
|
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) { |
|
325
|
|
|
return ''; // standard allows 128/192/256 bit keys |
|
326
|
|
|
} |
|
327
|
|
|
$ciphertext = base64_decode($ciphertext); |
|
328
|
|
|
|
|
329
|
|
|
// use AES to encrypt password (mirroring encrypt routine) |
|
330
|
|
|
$nBytes = $nBits / 8; // no bytes in key |
|
331
|
|
|
$pwBytes = array(); |
|
332
|
|
|
for ($i = 0; $i < $nBytes; $i++) { |
|
333
|
|
|
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff; |
|
334
|
|
|
} |
|
335
|
|
|
$key = Aes::cipher($pwBytes, Aes::keyExpansion($pwBytes)); |
|
336
|
|
|
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long |
|
337
|
|
|
|
|
338
|
|
|
// recover nonce from 1st element of ciphertext |
|
339
|
|
|
$counterBlock = array(); |
|
340
|
|
|
$ctrTxt = substr($ciphertext, 0, 8); |
|
341
|
|
|
for ($i = 0; $i < 8; $i++) { |
|
342
|
|
|
$counterBlock[$i] = ord(substr($ctrTxt, $i, 1)); |
|
343
|
|
|
} |
|
344
|
|
|
|
|
345
|
|
|
// generate key schedule |
|
346
|
|
|
$keySchedule = Aes::keyExpansion($key); |
|
347
|
|
|
|
|
348
|
|
|
// separate ciphertext into blocks (skipping past initial 8 bytes) |
|
349
|
|
|
$nBlocks = ceil((strlen($ciphertext) - 8) / $blockSize); |
|
350
|
|
|
$ct = array(); |
|
351
|
|
|
for ($b = 0; $b < $nBlocks; $b++) { |
|
352
|
|
|
$ct[$b] = substr($ciphertext, 8 + $b * $blockSize, 16); |
|
353
|
|
|
} |
|
354
|
|
|
$ciphertext = $ct; // ciphertext is now array of block-length strings |
|
355
|
|
|
|
|
356
|
|
|
// plaintext will get generated block-by-block into array of block-length strings |
|
357
|
|
|
$plaintxt = array(); |
|
358
|
|
|
|
|
359
|
|
|
for ($b = 0; $b < $nBlocks; $b++) { |
|
360
|
|
|
// set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes) |
|
361
|
|
|
for ($c = 0; $c < 4; $c++) { |
|
362
|
|
|
$counterBlock[15 - $c] = self::urs($b, $c * 8) & 0xff; |
|
363
|
|
|
} |
|
364
|
|
|
for ($c = 0; $c < 4; $c++) { |
|
365
|
|
|
$counterBlock[15 - $c - 4] = self::urs(($b + 1) / 0x100000000 - 1, $c * 8) & 0xff; |
|
366
|
|
|
} |
|
367
|
|
|
|
|
368
|
|
|
$cipherCntr = Aes::cipher($counterBlock, $keySchedule); // encrypt counter block |
|
369
|
|
|
|
|
370
|
|
|
$plaintxtByte = array(); |
|
371
|
|
|
for ($i = 0; $i < strlen($ciphertext[$b]); $i++) { |
|
372
|
|
|
// -- xor plaintext with ciphered counter byte-by-byte -- |
|
373
|
|
|
$plaintxtByte[$i] = $cipherCntr[$i] ^ ord(substr($ciphertext[$b], $i, 1)); |
|
374
|
|
|
$plaintxtByte[$i] = chr($plaintxtByte[$i]); |
|
375
|
|
|
} |
|
376
|
|
|
$plaintxt[$b] = implode('', $plaintxtByte); |
|
377
|
|
|
} |
|
378
|
|
|
|
|
379
|
|
|
// join array of blocks into single plaintext string |
|
380
|
|
|
$plaintext = implode('', $plaintxt); |
|
381
|
|
|
|
|
382
|
|
|
return $plaintext; |
|
383
|
|
|
} |
|
384
|
|
|
|
|
385
|
|
|
/* |
|
386
|
|
|
* Unsigned right shift function, since PHP has neither >>> operator nor unsigned ints |
|
387
|
|
|
* |
|
388
|
|
|
* @param $a number to be shifted (32-bit integer) |
|
389
|
|
|
* @param $b number of bits to shift a to the right (0..31) |
|
390
|
|
|
* @return a right-shifted and zero-filled by b bits |
|
391
|
|
|
*/ |
|
392
|
|
|
private static function urs($a, $b) |
|
393
|
|
|
{ |
|
394
|
|
|
$a &= 0xffffffff; |
|
395
|
|
|
$b &= 0x1f; // (bounds check) |
|
396
|
|
|
if ($a & 0x80000000 && $b > 0) { // if left-most bit set |
|
397
|
|
|
$a = ($a >> 1) & 0x7fffffff; // right-shift one bit & clear left-most bit |
|
398
|
|
|
$a = $a >> ($b - 1); // remaining right-shifts |
|
399
|
|
|
} else { // otherwise |
|
400
|
|
|
$a = ($a >> $b); // use normal right-shift |
|
401
|
|
|
} |
|
402
|
|
|
|
|
403
|
|
|
return $a; |
|
|
|
|
|
|
404
|
|
|
} |
|
405
|
|
|
} |
|
406
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
|
407
|
|
|
|
nilsteampassnet /
TeamPass
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The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g.
excluded_paths: ["lib/*"], you can move it to the dependency path list as follows:For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths