1.优点:
支持rsa加密解密，支持标准的rsa密钥；比jsrsasign加密速度稍微快几毫秒；加密内容可以用nodejs标准的加密模块crypto解密
2.缺点：
不能生产rsa密钥；
3.安装：
Web端
html文件引入jsencrypt.min.js（https://github.com/travist/jsencrypt）
Nodejs端：
npm i node-jsencrypto
nodejs端node-jsencrypt
var crypto = require('crypto');
date1 = new Date().getTime()
var { publicKey, privateKey } = crypto.generateKeyPairSync('rsa', {
modulusLength: 512,
publicKeyEncoding: {
type: 'spki',
format: 'pem'
},
privateKeyEncoding: {
type: 'pkcs1',
format: 'pem',
// cipher: 'aes-256-cbc',
// passphrase: 'top secret'
}
});
console.log(new Date().getTime() - date1)
// 引入加密模块
JSEncrypt = require('node-jsencrypt')
// 加密
date1 = new Date().getTime()
const jsEncrypt = new JSEncrypt()
jsEncrypt.setPublicKey(publicKey)
enc = jsEncrypt.encrypt('src')
console.log(new Date().getTime() - date1)
//解密
date1 = new Date().getTime()
var decrypt = new JSEncrypt();
decrypt.setPrivateKey(privateKey);
var uncrypted = decrypt.decrypt(enc);
console.log(new Date().getTime() - date1)
// 使用crypto模块解密
const dec3 = crypto.privateDecrypt({
key: privateKey,
padding: crypto.constants.RSA_PKCS1_PADDING
}, Buffer.from(enc.toString('base64'), 'base64')).toString();
console.log("jsrsasign decrypt: " + dec2);
web端JSEncrypt
<!doctype html>
<html>
<head>
<title>JavaScript RSA Encryption</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script src="http://passport.cnblogs.com/scripts/jsencrypt.min.js"></script>
<script src="./jsrsasign-all-min.js"></script>
<script type="text/javascript">
// Call this code when the page is done loading.
$(function () {
// Run a quick encryption/decryption when they click.
$('#testme').click(function () {
// Encrypt with the public key...
var date1 = new Date().getTime()
var encrypt = new JSEncrypt();
encrypt.setPublicKey($('#pubkey').val());
var encrypted = encrypt.encrypt('123');
console.log(new Date().getTime() - date1)
// jsrsasign加密
var date1 = new Date().getTime()
var pub = new KEYUTIL.getKey($('#pubkey').val());
var enc = KJUR.crypto.Cipher.encrypt('src', pub);
//console.log(rs.hextob64(enc));
console.log(new Date().getTime() - date1)
// Decrypt with the private key...
var decrypt = new JSEncrypt();
decrypt.setPrivateKey($('#privkey').val());
var uncrypted = decrypt.decrypt(encrypted);
// Now a simple check to see if the round-trip worked.
if (uncrypted == $('#input').val()) {
alert('It works!!!');
}
else {
alert('Something went wrong....');
}
});
});
</script>
</head>
<body>
<label for="privkey">Private Key</label><br />
<textarea id="privkey" rows="15" cols="65">-----BEGIN RSA PRIVATE KEY-----
MIIBOgIBAAJBAL1o9pLm8ErFu4rzJIizJY+4W3aTZlrEv0WhRKxVXkCt5Lwm2+aE
/YpwtEkIdCpwr//PTLN7y554MhR7tFNu748CAwEAAQJABOkKs2Y/RoD3yrNg+BZE
3AP4gwtxNNsy5jg3EoyoA98yxQQAe3/093Qll19zQVCwHqM9Ijy7EmK6k8NcE5TF
oQIhAOrEV8k3LiYCxnn2ogbRkgRQH1xUju01pvX5fpRBpy4RAiEAzopzsBEP9Bi/
6yNh9n+aMqTI1ceqhj71jbK62gN9I58CIQCAYB9U43yzwl7AALK3IdBD1YBgn8iM
RANpjCXAcmo10QIgHbczv9AkoHTzH8x+aq2fLMwijQdmFFx4jcN6OKWp2ncCIFZX
fwHIo+ZpL/avDe1P5I8FY9KlKnTXDCM9GnI9Unwb
-----END RSA PRIVATE KEY-----</textarea><br />
<label for="pubkey">Public Key</label><br />
<textarea id="pubkey" rows="15" cols="65">-----BEGIN PUBLIC KEY-----
MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAL1o9pLm8ErFu4rzJIizJY+4W3aTZlrE
v0WhRKxVXkCt5Lwm2+aE/YpwtEkIdCpwr//PTLN7y554MhR7tFNu748CAwEAAQ==
-----END PUBLIC KEY-----</textarea><br />
<label for="input">Text to encrypt:</label><br />
<textarea id="input" name="input" type="text" rows=4 cols=70>This is a test!</textarea><br />
<input id="testme" type="button" value="Test Me!!!" /><br />
</body>
</html>