## RSA数据验签 > 方法：**yunj.rsaSignVerify(data, sign, publicKey)** | 参数 | 类型 | 必须 | 说明 | | --- | --- | --- | --- | | `data` | string | 是 | 数据 | | `sign` | string | 是 | 数据签名 | | `publicKey` | string | 是 | RSA公钥 | 返回值：`Promise<boolean>` > 示例： ```javascript layui.use(['yunj'],function (){ let data = "123"; let sign= "FWHx+J7vrgR1DfqPjDZtEudrp9au/SgmqKCjJZERj7bVdjsVMbRwDn8lYFDTIqeiFlDaDoLvSQXjmpp/QkTLGsG5BmxQjgghauXmNnuWlZkbs5AMiyx1jFA4vbRlCT3k6272MtzGqDXP9U3hyd6iFkC2JnIF/GNiBZk1mDZVpcHLtUttEcdTQrYWOBBu1b/8O2AilTDNauWxvb7C4DHyUdxJ9VpVBUBlIQoYQK/N+SMQbvF2GNHofDUFGMujYOTmMOxsIr16dYppAjzAV/n9tYm3QqBvtfsCyZHohjruhfhBTow9KEVLUk6ZLbZgTY2e7QigxkRfnrrHLnzJ/UJBkQ=="; let publicKey= "***********************"; yunj.rsaSignVerify(data,sign,publicKey).then(res=>{ console.log(res); // 输出：true }) }); ```