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set(Controller_Settings::OPTION_SHARED_HASH_SECRET_KEY, $hashSecret); Controller_Settings::shared()->set(Controller_Settings::OPTION_SHARED_SYMMETRIC_SECRET_KEY, $symmetricSecret); Controller_Settings::shared()->set(Controller_Settings::OPTION_LAST_SECRET_REFRESH, Controller_Time::time(), true); } /** * Returns the secret for hashing. * * @return string */ public static function shared_hash_secret() { return Controller_Settings::shared()->get(Controller_Settings::OPTION_SHARED_HASH_SECRET_KEY); } /** * Returns the secret for symmetric encryption. * * @return string */ public static function shared_symmetric_secret() { return Controller_Settings::shared()->get(Controller_Settings::OPTION_SHARED_SYMMETRIC_SECRET_KEY); } /** * Returns whether or not the installation has the required crypto support for this to work. * * @return bool */ public static function has_required_crypto_functions() { if (function_exists('openssl_get_publickey') && function_exists('openssl_get_cipher_methods')) { $ciphers = openssl_get_cipher_methods(); return array_search('aes-256-cbc', $ciphers) !== false; } return false; } /** * Utility */ /** * Returns random bytes, optionally requiring PHP's operating-system-backed CSPRNG. * * @param int $bytes Number of bytes to return. * @param bool $allowFallback Whether legacy random-generator fallbacks may be used. * @return string Random bytes. * @throws \RuntimeException When fallback is disallowed and secure randomness is unavailable. */ public static function random_bytes($bytes, $allowFallback = true) { $bytes = (int) $bytes; $failure = null; if (function_exists('random_bytes')) { try { $rand = random_bytes($bytes); if (is_string($rand) && self::strlen($rand) === $bytes) { return $rand; } } catch (\Exception $e) { $failure = $e; } catch (\TypeError $e) { $failure = $e; } catch (\Error $e) { $failure = $e; } } if (!$allowFallback) { throw new \RuntimeException('Unable to generate secure random bytes.', 0, $failure); } if (function_exists('mcrypt_create_iv')) { // phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.mcrypt_create_ivDeprecatedRemoved,PHPCompatibility.Extensions.RemovedExtensions.mcryptDeprecatedRemoved,PHPCompatibility.Constants.RemovedConstants.mcrypt_dev_urandomDeprecatedRemoved $rand = @mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM); if (is_string($rand) && self::strlen($rand) === $bytes) { return $rand; } } if (function_exists('openssl_random_pseudo_bytes')) { $rand = @openssl_random_pseudo_bytes($bytes, $strong); if (is_string($rand) && self::strlen($rand) === $bytes) { return $rand; } } // Last resort is insecure $return = ''; for ($i = 0; $i < $bytes; $i++) { $return .= chr(mt_rand(0, 255)); } return $return; } /** * Polyfill for random_int. * * @param int $min * @param int $max * @return int */ public static function random_int($min = 0, $max = 0x7FFFFFFF) { if (function_exists('random_int')) { try { return random_int($min, $max); } catch (\Exception $e) { // Fall through } catch (\TypeError $e) { // Fall through } catch (\Error $e) { // Fall through } } $diff = $max - $min; $bytes = self::random_bytes(4); if ($bytes === false || self::strlen($bytes) != 4) { throw new \RuntimeException("Unable to get 4 bytes"); } $val = @unpack("Nint", $bytes); $val = $val['int'] & 0x7FFFFFFF; $fp = (float) $val / 2147483647.0; // convert to [0,1] return (int) (round($fp * $diff) + $min); } public static function uuid() { return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x', // 32 bits for "time_low" self::random_int(0, 0xffff), self::random_int(0, 0xffff), // 16 bits for "time_mid" self::random_int(0, 0xffff), // 16 bits for "time_hi_and_version", // four most significant bits holds version number 4 self::random_int(0, 0x0fff) | 0x4000, // 16 bits, 8 bits for "clk_seq_hi_res", // 8 bits for "clk_seq_low", // two most significant bits holds zero and one for variant DCE1.1 self::random_int(0, 0x3fff) | 0x8000, // 48 bits for "node" self::random_int(0, 0xffff), self::random_int(0, 0xffff), self::random_int(0, 0xffff) ); } /** * Set the mbstring internal encoding to a binary safe encoding when func_overload * is enabled. * * When mbstring.func_overload is in use for multi-byte encodings, the results from * strlen() and similar functions respect the utf8 characters, causing binary data * to return incorrect lengths. * * This function overrides the mbstring encoding to a binary-safe encoding, and * resets it to the users expected encoding afterwards through the * `reset_mbstring_encoding` function. * * It is safe to recursively call this function, however each * `_mbstring_binary_safe_encoding()` call must be followed up with an equal number * of `_reset_mbstring_encoding()` calls. * * @see Model_Crypto::_reset_mbstring_encoding * * @staticvar array $encodings * @staticvar bool $overloaded * * @param bool $reset Optional. Whether to reset the encoding back to a previously-set encoding. * Default false. */ protected static function _mbstring_binary_safe_encoding($reset = false) { static $encodings = array(); static $overloaded = null; if (is_null($overloaded)) { // phpcs:ignore PHPCompatibility.IniDirectives.RemovedIniDirectives.mbstring_func_overloadDeprecated $overloaded = function_exists('mb_internal_encoding') && (ini_get('mbstring.func_overload') & 2); } if (false === $overloaded) { return; } if (!$reset) { $encoding = mb_internal_encoding(); array_push($encodings, $encoding); mb_internal_encoding('ISO-8859-1'); } if ($reset && $encodings) { $encoding = array_pop($encodings); mb_internal_encoding($encoding); } } /** * Reset the mbstring internal encoding to a users previously set encoding. * * @see Model_Crypto::_mbstring_binary_safe_encoding */ protected static function _reset_mbstring_encoding() { self::_mbstring_binary_safe_encoding(true); } /** * @param callable $function * @param array $args * @return mixed */ protected static function _call_mb_string_function($function, $args) { self::_mbstring_binary_safe_encoding(); $return = call_user_func_array($function, $args); self::_reset_mbstring_encoding(); return $return; } /** * Multibyte safe strlen. * * @param $binary * @return int */ public static function strlen($binary) { $args = func_get_args(); return self::_call_mb_string_function('strlen', $args); } /** * @param $haystack * @param $needle * @param int $offset * @return int */ public static function stripos($haystack, $needle, $offset = 0) { $args = func_get_args(); return self::_call_mb_string_function('stripos', $args); } /** * @param $string * @return mixed */ public static function strtolower($string) { $args = func_get_args(); return self::_call_mb_string_function('strtolower', $args); } /** * @param $string * @param $start * @param $length * @return mixed */ public static function substr($string, $start, $length = null) { if ($length === null) { $length = self::strlen($string); } return self::_call_mb_string_function('substr', array( $string, $start, $length )); } /** * @param $haystack * @param $needle * @param int $offset * @return mixed */ public static function strpos($haystack, $needle, $offset = 0) { $args = func_get_args(); return self::_call_mb_string_function('strpos', $args); } /** * @param string $haystack * @param string $needle * @param int $offset * @param int $length * @return mixed */ public static function substr_count($haystack, $needle, $offset = 0, $length = null) { if ($length === null) { $length = self::strlen($haystack); } return self::_call_mb_string_function('substr_count', array( $haystack, $needle, $offset, $length )); } /** * @param $string * @return mixed */ public static function strtoupper($string) { $args = func_get_args(); return self::_call_mb_string_function('strtoupper', $args); } /** * @param string $haystack * @param string $needle * @param int $offset * @return mixed */ public static function strrpos($haystack, $needle, $offset = 0) { $args = func_get_args(); return self::_call_mb_string_function('strrpos', $args); } }