这是一个非对称加密的库，可以进行 rsa 加解密
使用方法

安装

npm install jsencrypt --save

jsencrypt rsa 加解密

let rsaStr = "这就是一个RSA加密的测试";let jsencryptObj = new jsencrypt();jsencryptObj.getKey();  //这个方法用来生成一个密钥对let publicKey = jsencryptObj.getPublicKey();  //得到公钥let privateKey = jsencryptObj.getPrivateKey();  //得到私钥let result1 = jsencryptObj.encrypt(rsaStr);  //加密var st = jsencryptObj.decrypt(result1);	//解密

上面是最基本的用法， 但是我们通常是 从前端接收到后端的数据，然后再去解密的，这里我们用 php 做后端加密数据，再用js 作前端来解密数据
这里我们首先产生一个公，私钥对

公钥字串
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
私钥字串
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzVtFE6hbihOKwDXlJDwu
RoQfF3K3HqS94xS4Su2Hw/7Ka6KUsagh+j0PlXISLAgBgLaylcgAY7Bm1MlmucMP
dGdBR6OFEdlp7nLwJc5kthDV0gon+1uU495VHXTPWVEcM95VkwO0GS6CH+AH0dMz
yatF4WM2gDnTaBZuQKGdu80g97gQS+LzlxH8GXDj+n0C61JMEpyj49PASkUZsInt
6SdqVO3gV/TZEvaFlObu+C8yfruFuqXWBmaP040wsjxeOFHZMfkaffgVIFndt63F
RdlZnVrGbIHCLoIx//M9bGGxdBnRnvQhTNgsncacxPdb6hxJuz2nmgVm3icbDnaM
HQIDAQAB
-----END PUBLIC KEY-----

在php中利用公钥来加密 （注意一下，公钥字符串的定义，是使用的 长字符定义的方式）
php rsa 加密很简单

$str="这是一个后端加密，前端解密的实验，RSA算法";//这里得到了私钥的密钥$private_key = <<<"eto"
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
eto;openssl_private_encrypt($str,$result,$private_key);//参数中的 $result 就是 rsa 的加密结果dump($result);//加密结果是一个二进制的数据，所以我们以base64一下传给前端echo base64_encode($result);
//结果 ： CcNW2lFUQHYAhz60CHpwPbCXlqpZYQIK0gJZWeE5IPJG9Hw8e3arJ3j9PqsLrDyCRub5pOJQQqrOpMIyOZCP05BUcJRpBi+DR6Z7MrJuqw7B+283mZO/bPllhj6SILz7BD17zodmzw9E+QZG/DdLouOGVKHiirU9STFRgD3DiN93Rj8JzK70gNCnWrEtrCfHA+NdagLCdUEITxf3DL574ZlUXrSIvCj/Rf48/gXWypxG333Pp/IswHtBL6UOuiKGyY//t2aTqCgWRT8qy3nvWAXfH4WgePe+irPYxwOQkXh90oSiRDT2gLhnLV3ZWSSMqaAfCgKNKsCF+uGdONwMiw==

js 进行解密
把php中的结果字符串得到

解密失败，  有太神帮我看一下 问题在哪