key = $key; $this->method = $method; $this->output = $output; $this->iv = $iv; $this->options = $options; } /** * 加密 * * @param $str * @return string */ public function encrypt($str) { $str = $this->padding($str, 8); $sign = openssl_encrypt($str, $this->method, $this->key, $this->options, $this->iv); if ($this->output == self::OUTPUT_BASE64) { $sign = base64_encode($sign); } else if ($this->output == self::OUTPUT_HEX) { $sign = bin2hex($sign); } return $sign; } /** * 填充 * * @param $str * @param $blockSize * @return string * @internal param $blocksize */ private function padding($str, $blockSize) { $pad = $blockSize - (strlen($str) % $blockSize); return $str . str_repeat(chr($pad), $pad); } /** * 解密 * * @param $encrypted * @return string */ public function decrypt($encrypted) { if ($this->output == self::OUTPUT_BASE64) { $encrypted = base64_decode($encrypted); } else if ($this->output == self::OUTPUT_HEX) { $encrypted = hex2bin($encrypted); } $sign = @openssl_decrypt($encrypted, $this->method, $this->key, $this->options, $this->iv); $sign = $this->unPadding($sign); $sign = rtrim($sign); return $sign; } /** * 去填充 * * @param $str * @return string */ private function unPadding($str) { $pad = ord($str[strlen($str) - 1]); if ($pad > strlen($str)) { return false; } return substr($str, 0, -1 * $pad); } }