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aes/mcrypt.php 0000604 00000006113 15245561455 0007354 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage utils
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
class FOFEncryptAesMcrypt extends FOFEncryptAesAbstract implements FOFEncryptAesInterface
{
protected $cipherType = MCRYPT_RIJNDAEL_128;
protected $cipherMode = MCRYPT_MODE_CBC;
public function setEncryptionMode($mode = 'cbc', $strength = 128)
{
switch ((int) $strength)
{
default:
case '128':
$this->cipherType = MCRYPT_RIJNDAEL_128;
break;
case '192':
$this->cipherType = MCRYPT_RIJNDAEL_192;
break;
case '256':
$this->cipherType = MCRYPT_RIJNDAEL_256;
break;
}
switch (strtolower($mode))
{
case 'ecb':
$this->cipherMode = MCRYPT_MODE_ECB;
break;
default:
case 'cbc':
$this->cipherMode = MCRYPT_MODE_CBC;
break;
}
}
public function encrypt($plainText, $key, $iv = null)
{
$iv_size = $this->getBlockSize();
$key = $this->resizeKey($key, $iv_size);
$iv = $this->resizeKey($iv, $iv_size);
if (empty($iv))
{
$randVal = new FOFEncryptRandval();
$iv = $randVal->generate($iv_size);
}
$cipherText = mcrypt_encrypt($this->cipherType, $key, $plainText, $this->cipherMode, $iv);
$cipherText = $iv . $cipherText;
return $cipherText;
}
public function decrypt($cipherText, $key)
{
$iv_size = $this->getBlockSize();
$key = $this->resizeKey($key, $iv_size);
$iv = substr($cipherText, 0, $iv_size);
$cipherText = substr($cipherText, $iv_size);
$plainText = mcrypt_decrypt($this->cipherType, $key, $cipherText, $this->cipherMode, $iv);
return $plainText;
}
public function isSupported(FOFUtilsPhpfunc $phpfunc = null)
{
if (!is_object($phpfunc) || !($phpfunc instanceof $phpfunc))
{
$phpfunc = new FOFUtilsPhpfunc();
}
if (!$phpfunc->function_exists('mcrypt_get_key_size'))
{
return false;
}
if (!$phpfunc->function_exists('mcrypt_get_iv_size'))
{
return false;
}
if (!$phpfunc->function_exists('mcrypt_create_iv'))
{
return false;
}
if (!$phpfunc->function_exists('mcrypt_encrypt'))
{
return false;
}
if (!$phpfunc->function_exists('mcrypt_decrypt'))
{
return false;
}
if (!$phpfunc->function_exists('mcrypt_list_algorithms'))
{
return false;
}
if (!$phpfunc->function_exists('hash'))
{
return false;
}
if (!$phpfunc->function_exists('hash_algos'))
{
return false;
}
$algorightms = $phpfunc->mcrypt_list_algorithms();
if (!in_array('rijndael-128', $algorightms))
{
return false;
}
if (!in_array('rijndael-192', $algorightms))
{
return false;
}
if (!in_array('rijndael-256', $algorightms))
{
return false;
}
$algorightms = $phpfunc->hash_algos();
if (!in_array('sha256', $algorightms))
{
return false;
}
return true;
}
public function getBlockSize()
{
return mcrypt_get_iv_size($this->cipherType, $this->cipherMode);
}
} aes/abstract.php 0000604 00000003576 15245561455 0007653 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage utils
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
/**
* Abstract AES encryption class
*/
abstract class FOFEncryptAesAbstract
{
/**
* Trims or zero-pads a key / IV
*
* @param string $key The key or IV to treat
* @param int $size The block size of the currently used algorithm
*
* @return null|string Null if $key is null, treated string of $size byte length otherwise
*/
public function resizeKey($key, $size)
{
if (empty($key))
{
return null;
}
$keyLength = strlen($key);
if (function_exists('mb_strlen'))
{
$keyLength = mb_strlen($key, 'ASCII');
}
if ($keyLength == $size)
{
return $key;
}
if ($keyLength > $size)
{
if (function_exists('mb_substr'))
{
return mb_substr($key, 0, $size, 'ASCII');
}
return substr($key, 0, $size);
}
return $key . str_repeat("\0", ($size - $keyLength));
}
/**
* Returns null bytes to append to the string so that it's zero padded to the specified block size
*
* @param string $string The binary string which will be zero padded
* @param int $blockSize The block size
*
* @return string The zero bytes to append to the string to zero pad it to $blockSize
*/
protected function getZeroPadding($string, $blockSize)
{
$stringSize = strlen($string);
if (function_exists('mb_strlen'))
{
$stringSize = mb_strlen($string, 'ASCII');
}
if ($stringSize == $blockSize)
{
return '';
}
if ($stringSize < $blockSize)
{
return str_repeat("\0", $blockSize - $stringSize);
}
$paddingBytes = $stringSize % $blockSize;
return str_repeat("\0", $blockSize - $paddingBytes);
}
} aes/openssl.php 0000604 00000007002 15245561455 0007517 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage utils
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
class FOFEncryptAesOpenssl extends FOFEncryptAesAbstract implements FOFEncryptAesInterface
{
/**
* The OpenSSL options for encryption / decryption
*
* @var int
*/
protected $openSSLOptions = 0;
/**
* The encryption method to use
*
* @var string
*/
protected $method = 'aes-128-cbc';
public function __construct()
{
$this->openSSLOptions = OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING;
}
public function setEncryptionMode($mode = 'cbc', $strength = 128)
{
static $availableAlgorithms = null;
static $defaultAlgo = 'aes-128-cbc';
if (!is_array($availableAlgorithms))
{
$availableAlgorithms = openssl_get_cipher_methods();
foreach (array('aes-256-cbc', 'aes-256-ecb', 'aes-192-cbc',
'aes-192-ecb', 'aes-128-cbc', 'aes-128-ecb') as $algo)
{
if (in_array($algo, $availableAlgorithms))
{
$defaultAlgo = $algo;
break;
}
}
}
$strength = (int) $strength;
$mode = strtolower($mode);
if (!in_array($strength, array(128, 192, 256)))
{
$strength = 256;
}
if (!in_array($mode, array('cbc', 'ebc')))
{
$mode = 'cbc';
}
$algo = 'aes-' . $strength . '-' . $mode;
if (!in_array($algo, $availableAlgorithms))
{
$algo = $defaultAlgo;
}
$this->method = $algo;
}
public function encrypt($plainText, $key, $iv = null)
{
$iv_size = $this->getBlockSize();
$key = $this->resizeKey($key, $iv_size);
$iv = $this->resizeKey($iv, $iv_size);
if (empty($iv))
{
$randVal = new FOFEncryptRandval();
$iv = $randVal->generate($iv_size);
}
$plainText .= $this->getZeroPadding($plainText, $iv_size);
$cipherText = openssl_encrypt($plainText, $this->method, $key, $this->openSSLOptions, $iv);
$cipherText = $iv . $cipherText;
return $cipherText;
}
public function decrypt($cipherText, $key)
{
$iv_size = $this->getBlockSize();
$key = $this->resizeKey($key, $iv_size);
$iv = substr($cipherText, 0, $iv_size);
$cipherText = substr($cipherText, $iv_size);
$plainText = openssl_decrypt($cipherText, $this->method, $key, $this->openSSLOptions, $iv);
return $plainText;
}
public function isSupported(FOFUtilsPhpfunc $phpfunc = null)
{
if (!is_object($phpfunc) || !($phpfunc instanceof $phpfunc))
{
$phpfunc = new FOFUtilsPhpfunc();
}
if (!$phpfunc->function_exists('openssl_get_cipher_methods'))
{
return false;
}
if (!$phpfunc->function_exists('openssl_random_pseudo_bytes'))
{
return false;
}
if (!$phpfunc->function_exists('openssl_cipher_iv_length'))
{
return false;
}
if (!$phpfunc->function_exists('openssl_encrypt'))
{
return false;
}
if (!$phpfunc->function_exists('openssl_decrypt'))
{
return false;
}
if (!$phpfunc->function_exists('hash'))
{
return false;
}
if (!$phpfunc->function_exists('hash_algos'))
{
return false;
}
$algorightms = $phpfunc->openssl_get_cipher_methods();
if (!in_array('aes-128-cbc', $algorightms))
{
return false;
}
$algorightms = $phpfunc->hash_algos();
if (!in_array('sha256', $algorightms))
{
return false;
}
return true;
}
/**
* @return int
*/
public function getBlockSize()
{
return openssl_cipher_iv_length($this->method);
}
} aes/interface.php 0000604 00000006265 15245561455 0010006 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage utils
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
/**
* Interface for AES encryption adapters
*/
interface FOFEncryptAesInterface
{
/**
* Sets the AES encryption mode.
*
* WARNING: The strength is deprecated as it has a different effect in MCrypt and OpenSSL. MCrypt was abandoned in
* 2003 before the Rijndael-128 algorithm was officially the Advanced Encryption Standard (AES). MCrypt also offered
* Rijndael-192 and Rijndael-256 algorithms with different block sizes. These are NOT used in AES. OpenSSL, however,
* implements AES correctly. It always uses a 128-bit (16 byte) block. The 192 and 256 bit strengths refer to the
* key size, not the block size. Therefore using different strengths in MCrypt and OpenSSL will result in different
* and incompatible ciphertexts.
*
* TL;DR: Always use $strength = 128!
*
* @param string $mode Choose between CBC (recommended) or ECB
* @param int $strength Bit strength of the key (128, 192 or 256 bits). DEPRECATED. READ NOTES ABOVE.
*
* @return mixed
*/
public function setEncryptionMode($mode = 'cbc', $strength = 128);
/**
* Encrypts a string. Returns the raw binary ciphertext.
*
* WARNING: The plaintext is zero-padded to the algorithm's block size. You are advised to store the size of the
* plaintext and trim the string to that length upon decryption.
*
* @param string $plainText The plaintext to encrypt
* @param string $key The raw binary key (will be zero-padded or chopped if its size is different than the block size)
* @param null|string $iv The initialization vector (for CBC mode algorithms)
*
* @return string The raw encrypted binary string.
*/
public function encrypt($plainText, $key, $iv = null);
/**
* Decrypts a string. Returns the raw binary plaintext.
*
* $ciphertext MUST start with the IV followed by the ciphertext, even for EBC data (the first block of data is
* dropped in EBC mode since there is no concept of IV in EBC).
*
* WARNING: The returned plaintext is zero-padded to the algorithm's block size during encryption. You are advised
* to trim the string to the original plaintext's length upon decryption. While rtrim($decrypted, "\0") sounds
* appealing it's NOT the correct approach for binary data (zero bytes may actually be part of your plaintext, not
* just padding!).
*
* @param string $cipherText The ciphertext to encrypt
* @param string $key The raw binary key (will be zero-padded or chopped if its size is different than the block size)
*
* @return string The raw unencrypted binary string.
*/
public function decrypt($cipherText, $key);
/**
* Returns the encryption block size in bytes
*
* @return int
*/
public function getBlockSize();
/**
* Is this adapter supported?
*
* @param FOFUtilsPhpfunc $phpfunc
*
* @return bool
*/
public function isSupported(FOFUtilsPhpfunc $phpfunc = null);
} aes.php 0000604 00000054036 15245561455 0006045 0 ustar 00 <?php
/**
* @copyright Copyright (c)2009-2013 Nicholas K. Dionysopoulos
* @license GNU General Public License version 3, or later
*
* @since 2.4
*/
// Protection against direct access
\defined('_JEXEC') or die;
/**
* AES implementation in PHP (c) Chris Veness 2005-2013.
* Right to use and adapt is granted for under a simple creative commons attribution
* licence. No warranty of any form is offered.
*
* Modified for Akeeba Backup by Nicholas K. Dionysopoulos
* Included for JCE with the kind permission of Nicholas K. Dionysopoulos
*/
class WFUtilEncrypt
{
// Sbox is pre-computed multiplicative inverse in GF(2^8) used in SubBytes and KeyExpansion [�5.1.1]
protected static $Sbox =
array(0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16, );
// Rcon is Round Constant used for the Key Expansion [1st col is 2^(r-1) in GF(2^8)] [�5.2]
protected static $Rcon = array(
array(0x00, 0x00, 0x00, 0x00),
array(0x01, 0x00, 0x00, 0x00),
array(0x02, 0x00, 0x00, 0x00),
array(0x04, 0x00, 0x00, 0x00),
array(0x08, 0x00, 0x00, 0x00),
array(0x10, 0x00, 0x00, 0x00),
array(0x20, 0x00, 0x00, 0x00),
array(0x40, 0x00, 0x00, 0x00),
array(0x80, 0x00, 0x00, 0x00),
array(0x1b, 0x00, 0x00, 0x00),
array(0x36, 0x00, 0x00, 0x00), );
protected static $passwords = array();
/**
* AES Cipher function: encrypt 'input' with Rijndael algorithm.
*
* @param input message as byte-array (16 bytes)
* @param w key schedule as 2D byte-array (Nr+1 x Nb bytes) -
* generated from the cipher key by KeyExpansion()
*
* @return ciphertext as byte-array (16 bytes)
*/
public static function Cipher($input, $w)
{ // main Cipher function [�5.1]
$Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES)
$Nr = count($w) / $Nb - 1; // no of rounds: 10/12/14 for 128/192/256-bit keys
$state = array(); // initialise 4xNb byte-array 'state' with input [�3.4]
for ($i = 0; $i < 4 * $Nb; ++$i) {
$state[$i % 4][floor($i / 4)] = $input[$i];
}
$state = self::AddRoundKey($state, $w, 0, $Nb);
for ($round = 1; $round < $Nr; ++$round) { // apply Nr rounds
$state = self::SubBytes($state, $Nb);
$state = self::ShiftRows($state, $Nb);
$state = self::MixColumns($state, $Nb);
$state = self::AddRoundKey($state, $w, $round, $Nb);
}
$state = self::SubBytes($state, $Nb);
$state = self::ShiftRows($state, $Nb);
$state = self::AddRoundKey($state, $w, $Nr, $Nb);
$output = array(4 * $Nb); // convert state to 1-d array before returning [�3.4]
for ($i = 0; $i < 4 * $Nb; ++$i) {
$output[$i] = $state[$i % 4][floor($i / 4)];
}
return $output;
}
protected static function AddRoundKey($state, $w, $rnd, $Nb)
{ // xor Round Key into state S [�5.1.4]
for ($r = 0; $r < 4; ++$r) {
for ($c = 0; $c < $Nb; ++$c) {
$state[$r][$c] ^= $w[$rnd * 4 + $c][$r];
}
}
return $state;
}
protected static function SubBytes($s, $Nb)
{ // apply SBox to state S [�5.1.1]
for ($r = 0; $r < 4; ++$r) {
for ($c = 0; $c < $Nb; ++$c) {
$s[$r][$c] = self::$Sbox[$s[$r][$c]];
}
}
return $s;
}
protected static function ShiftRows($s, $Nb)
{ // shift row r of state S left by r bytes [�5.1.2]
$t = array(4);
for ($r = 1; $r < 4; ++$r) {
for ($c = 0; $c < 4; ++$c) {
$t[$c] = $s[$r][($c + $r) % $Nb];
} // shift into temp copy
for ($c = 0; $c < 4; ++$c) {
$s[$r][$c] = $t[$c];
} // and copy back
} // note that this will work for Nb=4,5,6, but not 7,8 (always 4 for AES):
return $s; // see fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.311.pdf
}
protected static function MixColumns($s, $Nb)
{ // combine bytes of each col of state S [�5.1.3]
for ($c = 0; $c < 4; ++$c) {
$a = array(4); // 'a' is a copy of the current column from 's'
$b = array(4); // 'b' is a�{02} in GF(2^8)
for ($i = 0; $i < 4; ++$i) {
$a[$i] = $s[$i][$c];
$b[$i] = $s[$i][$c] & 0x80 ? $s[$i][$c] << 1 ^ 0x011b : $s[$i][$c] << 1;
}
// a[n] ^ b[n] is a�{03} in GF(2^8)
$s[0][$c] = $b[0] ^ $a[1] ^ $b[1] ^ $a[2] ^ $a[3]; // 2*a0 + 3*a1 + a2 + a3
$s[1][$c] = $a[0] ^ $b[1] ^ $a[2] ^ $b[2] ^ $a[3]; // a0 * 2*a1 + 3*a2 + a3
$s[2][$c] = $a[0] ^ $a[1] ^ $b[2] ^ $a[3] ^ $b[3]; // a0 + a1 + 2*a2 + 3*a3
$s[3][$c] = $a[0] ^ $b[0] ^ $a[1] ^ $a[2] ^ $b[3]; // 3*a0 + a1 + a2 + 2*a3
}
return $s;
}
/**
* Key expansion for Rijndael Cipher(): performs key expansion on cipher key
* to generate a key schedule.
*
* @param key cipher key byte-array (16 bytes)
*
* @return key schedule as 2D byte-array (Nr+1 x Nb bytes)
*/
public static function KeyExpansion($key)
{ // generate Key Schedule from Cipher Key [�5.2]
$Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES)
$Nk = count($key) / 4; // key length (in words): 4/6/8 for 128/192/256-bit keys
$Nr = $Nk + 6; // no of rounds: 10/12/14 for 128/192/256-bit keys
$w = array();
$temp = array();
for ($i = 0; $i < $Nk; ++$i) {
$r = array($key[4 * $i], $key[4 * $i + 1], $key[4 * $i + 2], $key[4 * $i + 3]);
$w[$i] = $r;
}
for ($i = $Nk; $i < ($Nb * ($Nr + 1)); ++$i) {
$w[$i] = array();
for ($t = 0; $t < 4; ++$t) {
$temp[$t] = $w[$i - 1][$t];
}
if ($i % $Nk == 0) {
$temp = self::SubWord(self::RotWord($temp));
for ($t = 0; $t < 4; ++$t) {
$temp[$t] ^= self::$Rcon[$i / $Nk][$t];
}
} elseif ($Nk > 6 && $i % $Nk == 4) {
$temp = self::SubWord($temp);
}
for ($t = 0; $t < 4; ++$t) {
$w[$i][$t] = $w[$i - $Nk][$t] ^ $temp[$t];
}
}
return $w;
}
protected static function SubWord($w)
{ // apply SBox to 4-byte word w
for ($i = 0; $i < 4; ++$i) {
$w[$i] = self::$Sbox[$w[$i]];
}
return $w;
}
protected static function RotWord($w)
{ // rotate 4-byte word w left by one byte
$tmp = $w[0];
for ($i = 0; $i < 3; ++$i) {
$w[$i] = $w[$i + 1];
}
$w[3] = $tmp;
return $w;
}
/*
* Unsigned right shift function, since PHP has neither >>> operator nor unsigned ints
*
* @param a number to be shifted (32-bit integer)
* @param b number of bits to shift a to the right (0..31)
* @return a right-shifted and zero-filled by b bits
*/
protected static function urs($a, $b)
{
$a &= 0xffffffff;
$b &= 0x1f; // (bounds check)
if ($a & 0x80000000 && $b > 0) { // if left-most bit set
$a = ($a >> 1) & 0x7fffffff; // right-shift one bit & clear left-most bit
$a = $a >> ($b - 1); // remaining right-shifts
} else { // otherwise
$a = ($a >> $b); // use normal right-shift
}
return $a;
}
/**
* Encrypt a text using AES encryption in Counter mode of operation
* - see http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf.
*
* Unicode multi-byte character safe
*
* @param plaintext source text to be encrypted
* @param password the password to use to generate a key
* @param nBits number of bits to be used in the key (128, 192, or 256)
*
* @return encrypted text
*/
public static function AESEncryptCtr($plaintext, $password, $nBits)
{
$blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) {
return '';
} // standard allows 128/192/256 bit keys
// note PHP (5) gives us plaintext and password in UTF8 encoding!
// use AES itself to encrypt password to get cipher key (using plain password as source for
// key expansion) - gives us well encrypted key
$nBytes = $nBits / 8; // no bytes in key
$pwBytes = array();
for ($i = 0; $i < $nBytes; ++$i) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$key = self::Cipher($pwBytes, self::KeyExpansion($pwBytes));
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long
// initialise counter block (NIST SP800-38A �B.2): millisecond time-stamp for nonce in
// 1st 8 bytes, block counter in 2nd 8 bytes
$counterBlock = array();
$nonce = floor(microtime(true) * 1000); // timestamp: milliseconds since 1-Jan-1970
$nonceSec = floor($nonce / 1000);
$nonceMs = $nonce % 1000;
// encode nonce with seconds in 1st 4 bytes, and (repeated) ms part filling 2nd 4 bytes
for ($i = 0; $i < 4; ++$i) {
$counterBlock[$i] = self::urs($nonceSec, $i * 8) & 0xff;
}
for ($i = 0; $i < 4; ++$i) {
$counterBlock[$i + 4] = $nonceMs & 0xff;
}
// and convert it to a string to go on the front of the ciphertext
$ctrTxt = '';
for ($i = 0; $i < 8; ++$i) {
$ctrTxt .= chr($counterBlock[$i]);
}
// generate key schedule - an expansion of the key into distinct Key Rounds for each round
$keySchedule = self::KeyExpansion($key);
$blockCount = ceil(strlen($plaintext) / $blockSize);
$ciphertxt = array(); // ciphertext as array of strings
for ($b = 0; $b < $blockCount; ++$b) {
// set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
// done in two stages for 32-bit ops: using two words allows us to go past 2^32 blocks (68GB)
for ($c = 0; $c < 4; ++$c) {
$counterBlock[15 - $c] = self::urs($b, $c * 8) & 0xff;
}
for ($c = 0; $c < 4; ++$c) {
$counterBlock[15 - $c - 4] = self::urs($b / 0x100000000, $c * 8);
}
$cipherCntr = self::Cipher($counterBlock, $keySchedule); // -- encrypt counter block --
// block size is reduced on final block
$blockLength = $b < $blockCount - 1 ? $blockSize : (strlen($plaintext) - 1) % $blockSize + 1;
$cipherByte = array();
for ($i = 0; $i < $blockLength; ++$i) { // -- xor plaintext with ciphered counter byte-by-byte --
$cipherByte[$i] = $cipherCntr[$i] ^ ord(substr($plaintext, $b * $blockSize + $i, 1));
$cipherByte[$i] = chr($cipherByte[$i]);
}
$ciphertxt[$b] = implode('', $cipherByte); // escape troublesome characters in ciphertext
}
// implode is more efficient than repeated string concatenation
$ciphertext = $ctrTxt.implode('', $ciphertxt);
$ciphertext = base64_encode($ciphertext);
return $ciphertext;
}
/**
* Decrypt a text encrypted by AES in counter mode of operation.
*
* @param ciphertext source text to be decrypted
* @param password the password to use to generate a key
* @param nBits number of bits to be used in the key (128, 192, or 256)
*
* @return decrypted text
*/
public static function AESDecryptCtr($ciphertext, $password, $nBits)
{
$blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) {
return '';
} // standard allows 128/192/256 bit keys
$ciphertext = base64_decode($ciphertext);
// use AES to encrypt password (mirroring encrypt routine)
$nBytes = $nBits / 8; // no bytes in key
$pwBytes = array();
for ($i = 0; $i < $nBytes; ++$i) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$key = self::Cipher($pwBytes, self::KeyExpansion($pwBytes));
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long
// recover nonce from 1st element of ciphertext
$counterBlock = array();
$ctrTxt = substr($ciphertext, 0, 8);
for ($i = 0; $i < 8; ++$i) {
$counterBlock[$i] = ord(substr($ctrTxt, $i, 1));
}
// generate key schedule
$keySchedule = self::KeyExpansion($key);
// separate ciphertext into blocks (skipping past initial 8 bytes)
$nBlocks = ceil((strlen($ciphertext) - 8) / $blockSize);
$ct = array();
for ($b = 0; $b < $nBlocks; ++$b) {
$ct[$b] = substr($ciphertext, 8 + $b * $blockSize, 16);
}
$ciphertext = $ct; // ciphertext is now array of block-length strings
// plaintext will get generated block-by-block into array of block-length strings
$plaintxt = array();
for ($b = 0; $b < $nBlocks; ++$b) {
// set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
for ($c = 0; $c < 4; ++$c) {
$counterBlock[15 - $c] = self::urs($b, $c * 8) & 0xff;
}
for ($c = 0; $c < 4; ++$c) {
$counterBlock[15 - $c - 4] = self::urs(($b + 1) / 0x100000000 - 1, $c * 8) & 0xff;
}
$cipherCntr = self::Cipher($counterBlock, $keySchedule); // encrypt counter block
$plaintxtByte = array();
for ($i = 0; $i < strlen($ciphertext[$b]); ++$i) {
// -- xor plaintext with ciphered counter byte-by-byte --
$plaintxtByte[$i] = $cipherCntr[$i] ^ ord(substr($ciphertext[$b], $i, 1));
$plaintxtByte[$i] = chr($plaintxtByte[$i]);
}
$plaintxt[$b] = implode('', $plaintxtByte);
}
// join array of blocks into single plaintext string
$plaintext = implode('', $plaintxt);
return $plaintext;
}
/**
* AES encryption in CBC mode. This is the standard mode (the CTR methods
* actually use Rijndael-128 in CTR mode, which - technically - isn't AES).
* The data length is tucked as a 32-bit unsigned integer (little endian)
* after the ciphertext. It supports AES-128, AES-192 and AES-256.
*
* @since 3.0.1
*
* @author Nicholas K. Dionysopoulos
*
* @param string $plaintext The data to encrypt
* @param string $password Encryption password
* @param int $nBits Encryption key size. Can be 128, 192 or 256
*
* @return string The ciphertext
*/
public static function AESEncryptCBC($plaintext, $password, $nBits = 128)
{
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) {
return false;
} // standard allows 128/192/256 bit keys
if (!function_exists('mcrypt_module_open')) {
return false;
}
// Try to fetch cached key/iv or create them if they do not exist
$lookupKey = $password.'-'.$nBits;
if (array_key_exists($lookupKey, self::$passwords)) {
$key = self::$passwords[$lookupKey]['key'];
$iv = self::$passwords[$lookupKey]['iv'];
} else {
// use AES itself to encrypt password to get cipher key (using plain password as source for
// key expansion) - gives us well encrypted key
$nBytes = $nBits / 8; // no bytes in key
$pwBytes = array();
for ($i = 0; $i < $nBytes; ++$i) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$key = self::Cipher($pwBytes, self::KeyExpansion($pwBytes));
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long
$newKey = '';
foreach ($key as $int) {
$newKey .= chr($int);
}
$key = $newKey;
// Create an Initialization Vector (IV) based on the password, using the same technique as for the key
$nBytes = 16; // AES uses a 128 -bit (16 byte) block size, hence the IV size is always 16 bytes
$pwBytes = array();
for ($i = 0; $i < $nBytes; ++$i) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$iv = self::Cipher($pwBytes, self::KeyExpansion($pwBytes));
$newIV = '';
foreach ($iv as $int) {
$newIV .= chr($int);
}
$iv = $newIV;
self::$passwords[$lookupKey]['key'] = $key;
self::$passwords[$lookupKey]['iv'] = $iv;
}
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
mcrypt_generic_init($td, $key, $iv);
$ciphertext = mcrypt_generic($td, $plaintext);
mcrypt_generic_deinit($td);
$ciphertext .= pack('V', strlen($plaintext));
return $ciphertext;
}
/**
* AES decryption in CBC mode. This is the standard mode (the CTR methods
* actually use Rijndael-128 in CTR mode, which - technically - isn't AES).
*
* Supports AES-128, AES-192 and AES-256. It supposes that the last 4 bytes
* contained a little-endian unsigned long integer representing the unpadded
* data length.
*
* @since 3.0.1
*
* @author Nicholas K. Dionysopoulos
*
* @param string $ciphertext The data to encrypt
* @param string $password Encryption password
* @param int $nBits Encryption key size. Can be 128, 192 or 256
*
* @return string The plaintext
*/
public static function AESDecryptCBC($ciphertext, $password, $nBits = 128)
{
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) {
return false;
} // standard allows 128/192/256 bit keys
if (!function_exists('mcrypt_module_open')) {
return false;
}
// Try to fetch cached key/iv or create them if they do not exist
$lookupKey = $password.'-'.$nBits;
if (array_key_exists($lookupKey, self::$passwords)) {
$key = self::$passwords[$lookupKey]['key'];
$iv = self::$passwords[$lookupKey]['iv'];
} else {
// use AES itself to encrypt password to get cipher key (using plain password as source for
// key expansion) - gives us well encrypted key
$nBytes = $nBits / 8; // no bytes in key
$pwBytes = array();
for ($i = 0; $i < $nBytes; ++$i) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$key = self::Cipher($pwBytes, self::KeyExpansion($pwBytes));
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long
$newKey = '';
foreach ($key as $int) {
$newKey .= chr($int);
}
$key = $newKey;
// Create an Initialization Vector (IV) based on the password, using the same technique as for the key
$nBytes = 16; // AES uses a 128 -bit (16 byte) block size, hence the IV size is always 16 bytes
$pwBytes = array();
for ($i = 0; $i < $nBytes; ++$i) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$iv = self::Cipher($pwBytes, self::KeyExpansion($pwBytes));
$newIV = '';
foreach ($iv as $int) {
$newIV .= chr($int);
}
$iv = $newIV;
self::$passwords[$lookupKey]['key'] = $key;
self::$passwords[$lookupKey]['iv'] = $iv;
}
// Read the data size
$data_size = unpack('V', substr($ciphertext, -4));
// Decrypt
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
mcrypt_generic_init($td, $key, $iv);
$plaintext = mdecrypt_generic($td, substr($ciphertext, 0, -4));
mcrypt_generic_deinit($td);
// Trim padding, if necessary
if (strlen($plaintext) > $data_size) {
$plaintext = substr($plaintext, 0, $data_size);
}
return $plaintext;
}
}
randval.php 0000604 00000004030 15245561455 0006711 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage utils
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
* @note This file has been modified by the Joomla! Project and no longer reflects the original work of its author.
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
/**
* Generates cryptographically-secure random values.
*/
class FOFEncryptRandval implements FOFEncryptRandvalinterface
{
/**
* Returns a cryptographically secure random value.
*
* Since we only run on PHP 7+ we can use random_bytes(), which internally uses a crypto safe PRNG. If the function
* doesn't exist, Joomla already loads a secure polyfill.
*
* The reason this method exists is backwards compatibility with older versions of FOF. It also allows us to quickly
* address any future issues if Joomla drops the polyfill or otherwise find problems with PHP's random_bytes() on
* some weird host (you can't be too careful when releasing mass-distributed software).
*
* @param integer $bytes How many bytes to return
*
* @return string
*/
public function generate($bytes = 32)
{
return random_bytes($bytes);
}
/**
* Generate random bytes. Adapted from Joomla! 3.2.
*
* Since we only run on PHP 7+ we can use random_bytes(), which internally uses a crypto safe PRNG. If the function
* doesn't exist, Joomla already loads a secure polyfill.
*
* The reason this method exists is backwards compatibility with older versions of FOF. It also allows us to quickly
* address any future issues if Joomla drops the polyfill or otherwise find problems with PHP's random_bytes() on
* some weird host (you can't be too careful when releasing mass-distributed software).
*
* @param integer $length Length of the random data to generate
*
* @return string Random binary data
*/
public function genRandomBytes($length = 32)
{
return random_bytes($length);
}
}
randvalinterface.php 0000604 00000000746 15245561455 0010604 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage utils
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Protect from unauthorized access
defined('FOF_INCLUDED') or die;
interface FOFEncryptRandvalinterface
{
/**
*
* Returns a cryptographically secure random value.
*
* @return string
*
*/
public function generate();
} totp.php 0000604 00000011101 15245561455 0006245 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage encrypt
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('F0F_INCLUDED') or die;
/**
* This class provides an RFC6238-compliant Time-based One Time Passwords,
* compatible with Google Authenticator (with PassCodeLength = 6 and TimePeriod = 30).
*
* @package FrameworkOnFramework
* @since 1.0
*/
class F0FEncryptTotp
{
private $_passCodeLength = 6;
private $_pinModulo;
private $_secretLength = 10;
private $_timeStep = 30;
private $_base32 = null;
/**
* Initialises an RFC6238-compatible TOTP generator. Please note that this
* class does not implement the constraint in the last paragraph of §5.2
* of RFC6238. It's up to you to ensure that the same user/device does not
* retry validation within the same Time Step.
*
* @param int $timeStep The Time Step (in seconds). Use 30 to be compatible with Google Authenticator.
* @param int $passCodeLength The generated passcode length. Default: 6 digits.
* @param int $secretLength The length of the secret key. Default: 10 bytes (80 bits).
* @param Object $base32 The base32 en/decrypter
*/
public function __construct($timeStep = 30, $passCodeLength = 6, $secretLength = 10, $base32=null)
{
$this->_timeStep = $timeStep;
$this->_passCodeLength = $passCodeLength;
$this->_secretLength = $secretLength;
$this->_pinModulo = pow(10, $this->_passCodeLength);
if (is_null($base32))
{
$this->_base32 = new F0FEncryptBase32;
}
else
{
$this->_base32 = $base32;
}
}
/**
* Get the time period based on the $time timestamp and the Time Step
* defined. If $time is skipped or set to null the current timestamp will
* be used.
*
* @param int|null $time Timestamp
*
* @return int The time period since the UNIX Epoch
*/
public function getPeriod($time = null)
{
if (is_null($time))
{
$time = time();
}
$period = floor($time / $this->_timeStep);
return $period;
}
/**
* Check is the given passcode $code is a valid TOTP generated using secret
* key $secret
*
* @param string $secret The Base32-encoded secret key
* @param string $code The passcode to check
*
* @return boolean True if the code is valid
*/
public function checkCode($secret, $code)
{
$time = $this->getPeriod();
for ($i = -1; $i <= 1; $i++)
{
if ($this->getCode($secret, ($time + $i) * $this->_timeStep) == $code)
{
return true;
}
}
return false;
}
/**
* Gets the TOTP passcode for a given secret key $secret and a given UNIX
* timestamp $time
*
* @param string $secret The Base32-encoded secret key
* @param int $time UNIX timestamp
*
* @return string
*/
public function getCode($secret, $time = null)
{
$period = $this->getPeriod($time);
$secret = $this->_base32->decode($secret);
$time = pack("N", $period);
$time = str_pad($time, 8, chr(0), STR_PAD_LEFT);
$hash = hash_hmac('sha1', $time, $secret, true);
$offset = ord(substr($hash, -1));
$offset = $offset & 0xF;
$truncatedHash = $this->hashToInt($hash, $offset) & 0x7FFFFFFF;
$pinValue = str_pad($truncatedHash % $this->_pinModulo, $this->_passCodeLength, "0", STR_PAD_LEFT);
return $pinValue;
}
/**
* Extracts a part of a hash as an integer
*
* @param string $bytes The hash
* @param string $start The char to start from (0 = first char)
*
* @return string
*/
protected function hashToInt($bytes, $start)
{
$input = substr($bytes, $start, strlen($bytes) - $start);
$val2 = unpack("N", substr($input, 0, 4));
return $val2[1];
}
/**
* Returns a QR code URL for easy setup of TOTP apps like Google Authenticator
*
* @param string $user User
* @param string $hostname Hostname
* @param string $secret Secret string
*
* @return string
*/
public function getUrl($user, $hostname, $secret)
{
$url = sprintf("otpauth://totp/%s@%s?secret=%s", $user, $hostname, $secret);
$encoder = "https://chart.googleapis.com/chart?chs=200x200&chld=Q|2&cht=qr&chl=";
$encoderURL = $encoder . urlencode($url);
return $encoderURL;
}
/**
* Generates a (semi-)random Secret Key for TOTP generation
*
* @return string
*/
public function generateSecret()
{
$secret = "";
for ($i = 1; $i <= $this->_secretLength; $i++)
{
$c = rand(0, 255);
$secret .= pack("c", $c);
}
$base32 = new F0FEncryptBase32;
return $this->_base32->encode($secret);
}
}
base32.php 0000604 00000011105 15245561455 0006342 0 ustar 00 <?php
/**
* @package FrameworkOnFramework
* @subpackage encrypt
* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('F0F_INCLUDED') or die;
/**
* F0FEncryptBase32
*
* @package FrameworkOnFramework
* @since 1.0
*/
class F0FEncryptBase32
{
/**
* CSRFC3548
*
* The character set as defined by RFC3548
* @link http://www.ietf.org/rfc/rfc3548.txt
*/
const CSRFC3548 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';
/**
* str2bin
*
* Converts any ascii string to a binary string
*
* @param string $str The string you want to convert
*
* @return string String of 0's and 1's
*/
private function str2bin($str)
{
$chrs = unpack('C*', $str);
return vsprintf(str_repeat('%08b', count($chrs)), $chrs);
}
/**
* bin2str
*
* Converts a binary string to an ascii string
*
* @param string $str The string of 0's and 1's you want to convert
*
* @return string The ascii output
*
* @throws Exception
*/
private function bin2str($str)
{
if (strlen($str) % 8 > 0)
{
throw new Exception('Length must be divisible by 8');
}
if (!preg_match('/^[01]+$/', $str))
{
throw new Exception('Only 0\'s and 1\'s are permitted');
}
preg_match_all('/.{8}/', $str, $chrs);
$chrs = array_map('bindec', $chrs[0]);
// I'm just being slack here
array_unshift($chrs, 'C*');
return call_user_func_array('pack', $chrs);
}
/**
* fromBin
*
* Converts a correct binary string to base32
*
* @param string $str The string of 0's and 1's you want to convert
*
* @return string String encoded as base32
*
* @throws exception
*/
private function fromBin($str)
{
if (strlen($str) % 8 > 0)
{
throw new Exception('Length must be divisible by 8');
}
if (!preg_match('/^[01]+$/', $str))
{
throw new Exception('Only 0\'s and 1\'s are permitted');
}
// Base32 works on the first 5 bits of a byte, so we insert blanks to pad it out
$str = preg_replace('/(.{5})/', '000$1', $str);
// We need a string divisible by 5
$length = strlen($str);
$rbits = $length & 7;
if ($rbits > 0)
{
// Excessive bits need to be padded
$ebits = substr($str, $length - $rbits);
$str = substr($str, 0, $length - $rbits);
$str .= "000$ebits" . str_repeat('0', 5 - strlen($ebits));
}
preg_match_all('/.{8}/', $str, $chrs);
$chrs = array_map(array($this, '_mapcharset'), $chrs[0]);
return join('', $chrs);
}
/**
* toBin
*
* Accepts a base32 string and returns an ascii binary string
*
* @param string $str The base32 string to convert
*
* @return string Ascii binary string
*
* @throws Exception
*/
private function toBin($str)
{
if (!preg_match('/^[' . self::CSRFC3548 . ']+$/', $str))
{
throw new Exception('Must match character set');
}
// Convert the base32 string back to a binary string
$str = join('', array_map(array($this, '_mapbin'), str_split($str)));
// Remove the extra 0's we added
$str = preg_replace('/000(.{5})/', '$1', $str);
// Unpad if nessicary
$length = strlen($str);
$rbits = $length & 7;
if ($rbits > 0)
{
$str = substr($str, 0, $length - $rbits);
}
return $str;
}
/**
* fromString
*
* Convert any string to a base32 string
* This should be binary safe...
*
* @param string $str The string to convert
*
* @return string The converted base32 string
*/
public function encode($str)
{
return $this->fromBin($this->str2bin($str));
}
/**
* toString
*
* Convert any base32 string to a normal sctring
* This should be binary safe...
*
* @param string $str The base32 string to convert
*
* @return string The normal string
*/
public function decode($str)
{
$str = strtoupper($str);
return $this->bin2str($this->tobin($str));
}
/**
* _mapcharset
*
* Used with array_map to map the bits from a binary string
* directly into a base32 character set
*
* @param string $str The string of 0's and 1's you want to convert
*
* @return string Resulting base32 character
*
* @access private
*/
private function _mapcharset($str)
{
// Huh!
$x = self::CSRFC3548;
return $x[bindec($str)];
}
/**
* _mapbin
*
* Used with array_map to map the characters from a base32
* character set directly into a binary string
*
* @param string $chr The caracter to map
*
* @return string String of 0's and 1's
*
* @access private
*/
private function _mapbin($chr)
{
return sprintf('%08b', strpos(self::CSRFC3548, $chr));
}
}