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OpenSSL.php��0000644��00000015260�15173107106�0006545 0��ustar�00��<?php /** * Joomla! Content Management System * * @copyright (C) 2016 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt / namespace Joomla\CMS\Encrypt\AES; use Joomla\CMS\Encrypt\Randval; // phpcs:disable PSR1.Files.SideEffects \defined('JPATH_PLATFORM') or die; // phpcs:enable PSR1.Files.SideEffects /* * OpenSSL encryption class * * @since 4.0.0 / class OpenSSL extends AbstractAES implements AesInterface { /* * The OpenSSL options for encryption / decryption * * @var integer / protected $openSSLOptions = 0; /* * The encryption method to use * * @var string / protected $method = 'aes-128-cbc'; /* * Constructor for this class / public function __construct() { $this->openSSLOptions = OPENSSL_RAW_DATA \| OPENSSL_ZERO_PADDING; } /* * 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 $strength Bit strength of the key (128, 192 or 256 bits). DEPRECATED. READ NOTES ABOVE. * * @return void / public function setEncryptionMode($mode = 'cbc', $strength = 128) { static $availableAlgorithms = null; static $defaultAlgo = 'aes-128-cbc'; if (!\is_array($availableAlgorithms)) { $availableAlgorithms = openssl_get_cipher_methods(); foreach ( ['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, [128, 192, 256])) { $strength = 256; } if (!\in_array($mode, ['cbc', 'ebc'])) { $mode = 'cbc'; } $algo = 'aes-' . $strength . '-' . $mode; if (!\in_array($algo, $availableAlgorithms)) { $algo = $defaultAlgo; } $this->method = $algo; } /* * 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) { $iv_size = $this->getBlockSize(); $key = $this->resizeKey($key, $iv_size); $iv = $this->resizeKey($iv, $iv_size); if (empty($iv)) { $randVal = new Randval(); $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; } /* * 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) { $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, $iv); // Remove the zero padding return rtrim($plainText, "\0"); } /* * Is this adapter supported? * * @return boolean / public function isSupported() { if (!\function_exists('openssl_get_cipher_methods')) { return false; } if (!\function_exists('openssl_random_pseudo_bytes')) { return false; } if (!\function_exists('openssl_cipher_iv_length')) { return false; } if (!\function_exists('openssl_encrypt')) { return false; } if (!\function_exists('openssl_decrypt')) { return false; } if (!\function_exists('hash')) { return false; } if (!\function_exists('hash_algos')) { return false; } $algorithms = openssl_get_cipher_methods(); if (!\in_array('aes-128-cbc', $algorithms)) { return false; } $algorithms = hash_algos(); if (!\in_array('sha256', $algorithms)) { return false; } return true; } /* * Returns the encryption block size in bytes * * @return integer / public function getBlockSize() { return openssl_cipher_iv_length($this->method); } } ��AesInterface.php��0000644��00000006527�15173107106�0007621 0��ustar�00��<?php /* * Joomla! Content Management System * * @copyright (C) 2016 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt / namespace Joomla\CMS\Encrypt\AES; // phpcs:disable PSR1.Files.SideEffects \defined('JPATH_PLATFORM') or die; // phpcs:enable PSR1.Files.SideEffects /* * Interface for AES encryption adapters * * @since 4.0.0 / interface AesInterface { /* * 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 integer / public function getBlockSize(); /* * Is this adapter supported? * * @return boolean / public function isSupported(); } ��Mcrypt.php��0000644��00000011033�15173107106�0006532 0��ustar�00��<?php /* * Joomla! Content Management System * * @copyright (C) 2016 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt / namespace Joomla\CMS\Encrypt\AES; use Joomla\CMS\Encrypt\Randval; // phpcs:disable PSR1.Files.SideEffects \defined('JPATH_PLATFORM') or die; // phpcs:enable PSR1.Files.SideEffects /* * Mcrypt implementation * * @since 4.0.0 * * @deprecated 4.3 will be removed in 6.0 * Will be removed without replacement / class Mcrypt extends AbstractAES implements AesInterface { /* * Cypher Type * * @var string / protected $cipherType = MCRYPT_RIJNDAEL_128; /* * Cypher Mode * * @var string / protected $cipherMode = MCRYPT_MODE_CBC; /* * Set the encryption mode * * @param string $mode Encryption Mode * @param integer $strength Encryption Strength * * @return void / public function setEncryptionMode($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; } } /* * Encrypt the data * * @param string $plainText Plaintext data * @param string $key Encryption key * @param string $iv IV for the encryption * * @return string Encrypted data / public function encrypt($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 Randval(); $iv = $randVal->generate($iv_size); } $cipherText = mcrypt_encrypt($this->cipherType, $key, $plainText, $this->cipherMode, $iv); $cipherText = $iv . $cipherText; return $cipherText; } /* * Decrypt encrypted data * * @param string $cipherText Encrypted data * @param string $key Encryptionkey * * @return string Plaintext data / public function decrypt($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; } /* * Is this adapter supported? * * @return boolean / public function isSupported() { if (!\function_exists('mcrypt_get_key_size')) { return false; } if (!\function_exists('mcrypt_get_iv_size')) { return false; } if (!\function_exists('mcrypt_create_iv')) { return false; } if (!\function_exists('mcrypt_encrypt')) { return false; } if (!\function_exists('mcrypt_decrypt')) { return false; } if (!\function_exists('mcrypt_list_algorithms')) { return false; } if (!\function_exists('hash')) { return false; } if (!\function_exists('hash_algos')) { return false; } $algorigthms = mcrypt_list_algorithms(); if (!\in_array('rijndael-128', $algorigthms)) { return false; } if (!\in_array('rijndael-192', $algorigthms)) { return false; } if (!\in_array('rijndael-256', $algorigthms)) { return false; } $algorigthms = hash_algos(); if (!\in_array('sha256', $algorigthms)) { return false; } return true; } /* * Get the block size * * @return integer / public function getBlockSize() { return mcrypt_get_iv_size($this->cipherType, $this->cipherMode); } } ��AbstractAES.php��0000644��00000004264�15173107106�0007360 0��ustar�00��<?php /* * Joomla! Content Management System * * @copyright (C) 2016 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt / namespace Joomla\CMS\Encrypt\AES; // phpcs:disable PSR1.Files.SideEffects \defined('JPATH_PLATFORM') or die; // phpcs:enable PSR1.Files.SideEffects /* * Abstract AES encryption class * * @since 4.0.0 / abstract class AbstractAES { /* * 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); } } ��

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