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<?php

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// phpcs:disable PHPCompatibility.Constants.NewConstants.openssl_raw_dataFound -- This and the following exceptions are made as function and version checks are also made

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// phpcs:disable PHPCompatibility.Constants.RemovedConstants.mcrypt_mode_ecbDeprecatedRemoved

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// phpcs:disable PHPCompatibility.Constants.RemovedConstants.mcrypt_randDeprecatedRemoved

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// phpcs:disable PHPCompatibility.Constants.RemovedConstants.mcrypt_rijndael_256DeprecatedRemoved

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// phpcs:disable PHPCompatibility.Extensions.RemovedExtensions.mcryptDeprecatedRemoved

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// phpcs:disable PHPCompatibility.FunctionUse.NewFunctionParameters.openssl_decrypt_ivFound

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// phpcs:disable PHPCompatibility.FunctionUse.NewFunctionParameters.openssl_encrypt_ivFound

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// phpcs:disable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_create_ivDeprecatedRemoved

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// phpcs:disable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_decryptDeprecatedRemoved

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// phpcs:disable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_encryptDeprecatedRemoved

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// phpcs:disable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_get_iv_sizeDeprecatedRemoved

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class WPML_Data_Encryptor {

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const SALT_CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';

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const SALT_LENGTH = 64;

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/**

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* @var string $method

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private $method;

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/**

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* @var string $key

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private $key;

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/**

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* @var string $iv

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private $iv;

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/**

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* @var string

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private $library = false;

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/**

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* WPML_Data_Encryptor constructor.

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* @param string $key_salt

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* @param string $method

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public function __construct( $key_salt = '', $method = 'AES-256-CTR' ) {

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if ( ! $key_salt ) {

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$key_salt = $this->get_key_salt();

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}

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if ( function_exists( 'openssl_encrypt' ) && function_exists( 'openssl_decrypt' )

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&& version_compare( phpversion(), '5.3.2', '>' ) ) {

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$methods = openssl_get_cipher_methods();

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if ( ! in_array( $method, $methods ) && ! empty( $methods ) ) {

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$this->method = $methods[0];

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} else {

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$this->method = $method;

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}

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$this->library = 'openssl';

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$this->key = substr( sha1( $key_salt, true ), 0, 16 );

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$this->iv = substr( $key_salt, 0, 16 );

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} else if ( function_exists( 'mcrypt_encrypt' ) && function_exists( 'mcrypt_decrypt' ) ) { // PHP 5.2 support

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$this->library = 'mcrypt';

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$this->key = substr( NONCE_KEY, 0, 24 );

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$this->iv = mcrypt_create_iv( mcrypt_get_iv_size( MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB ), MCRYPT_RAND );

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}

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}

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/**

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* @param string $data

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* @return string

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public function encrypt( $data ) {

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if ( $this->library === 'openssl' ) {

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$encrypted_data = openssl_encrypt( $data, $this->method, $this->key, OPENSSL_RAW_DATA, $this->iv );

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} elseif ( $this->library === 'mcrypt' ) { // PHP 5.2 support

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$encrypted_data = mcrypt_encrypt( MCRYPT_RIJNDAEL_256, $this->key, $data, MCRYPT_MODE_ECB, $this->iv );

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$encrypted_data = preg_replace( '/\x00/', '', $encrypted_data ); // strip padding added to match the block size

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} else {

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$encrypted_data = $data;

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}

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return $encrypted_data;

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}

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/**

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* @param string $encrypted_data

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* @return string

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public function decrypt( $encrypted_data ) {

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if ( $this->library === 'openssl' ) {

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$data = openssl_decrypt( $encrypted_data, $this->method, $this->key, OPENSSL_RAW_DATA, $this->iv );

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} elseif ( $this->library === 'mcrypt' ) { // PHP 5.2 support

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$data = mcrypt_decrypt( MCRYPT_RIJNDAEL_256, $this->key, $encrypted_data, MCRYPT_MODE_ECB, $this->iv );

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$data = preg_replace( '/\x00/', '', $data );

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} else {

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$data = $encrypted_data;

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}

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return $data;

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}

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/**

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* @param string $library

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public function set_crypt_library( $library ){

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$this->library = $library;

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}

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/**

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* @return string

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public function get_crypt_library(){

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return $this->library;

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}

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/**

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* @return string

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private function get_key_salt() {

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if ( defined( 'NONCE_SALT' ) ){

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return NONCE_SALT;

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}

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return $this->generate_salt_key();

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}

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/**

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* @return string

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private function generate_salt_key() {

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$salt_key = '';

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for ( $i = 0; $i < self::SALT_LENGTH; $i++ ) {

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$salt_key .= substr( self::SALT_CHARS, mt_rand( 0, strlen( self::SALT_CHARS ) - 1 ), 1 );

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}

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return $salt_key;

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}

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}

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// phpcs:enable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_get_iv_sizeDeprecatedRemoved

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// phpcs:enable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_encryptDeprecatedRemoved

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// phpcs:enable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_decryptDeprecatedRemoved

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// phpcs:enable PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_create_ivDeprecatedRemoved

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// phpcs:enable PHPCompatibility.FunctionUse.NewFunctionParameters.openssl_encrypt_ivFound

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// phpcs:enable PHPCompatibility.FunctionUse.NewFunctionParameters.openssl_decrypt_ivFound

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// phpcs:enable PHPCompatibility.Extensions.RemovedExtensions.mcryptDeprecatedRemoved

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// phpcs:enable PHPCompatibility.Constants.RemovedConstants.mcrypt_rijndael_256DeprecatedRemoved

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// phpcs:enable PHPCompatibility.Constants.RemovedConstants.mcrypt_randDeprecatedRemoved

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// phpcs:enable PHPCompatibility.Constants.RemovedConstants.mcrypt_mode_ecbDeprecatedRemoved

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// phpcs:enable PHPCompatibility.Constants.NewConstants.openssl_raw_dataFound

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