nl_tokens: 验证 Hmac
pl_tokens: function ( hmac , bodyData ) { if ( arguments . length < 2 ) { throw paramError ; } var calculatedHmac = crypto . createHmac ( 'sha256' , this . <mask> ) . update ( bodyData , 'utf8' ) . digest ( 'base64' ) ; return hmac === calculatedHmac ; }