求助： Assertion failed: encoding == BINARY, file src\node.cc, line 1223

在windows下使用node的对称加密报的错

var encipher = crypto.createCipheriv('aes-256-cbc', setting.cookie_secret_key, iv), encoded = encipher.update(cryptdata, 'base64', 'utf8');

    encoded   += encipher.final( 'utf8' );
    return decoded;