JavaScript實現RSA加解密

本文轉載自查看原文 2019-03-28 23:59 1620 RSA/ javaScript

　　在GitHub上找到jsencrypt.js對RSA加解密的工具文件，地址分別是：https://github.com/travist/jsencrypt和https://github.com/openstack/xstatic-jsencrypt/blob/master/xstatic/pkg/jsencrypt/data/jsencrypt.js，兩種都用《Java實現RSA密鑰對並在加解密、加簽驗簽中應用的實例》中生成的公私鑰驗證OK。

public class Constants {

  //#priKeyText
  public final static String priKeyText = "MIICdgIBADANBgkqhkiG9w0BAQEFAASCAmAwggJcAgEAAoGBAJg7beoxy+/SCkaz3ut+bEhOOPPmb+yNngmBi88Gz4kfAP9IK/tMkIQpWbhpdMQ9NdGQ3suBSNBOcQYZLUkFjjPKqmeYlx+k3Fal2ADIT/imgwnytxm+qbXgM6M0f7r2bCkh0mTJIe7NQLNC0wnwYbajA1z1+tM6lmjOVxRZsZZ9AgMBAAECgYAoGzAgDTJ/YkTWz7ihLlN00Tbr+v/twHmsY3bj+hVfOM3Yc7kyob9JMmOy1AWxVbcCGTq5PrxiNOhOBQALRu1pivDsGDm2wA+Jb4vSIwL8dFCnIMlFFPMUb5VwtNIdlEZDQdZoLV7185OJ4IEK//GuNTwCklZNIOZ0j0YMEUw7uQJBAN5C3QpRWfwRhDf1S5+RaQPZWKehuc3DU2T67/tIUOKkSnY/KUX4KxPxCXXRsrbzU4mwoW0npBO3mtuOFDsk788CQQCvVzdjz7TZXFcGOjhk1e+id/ElW69/nt6DQmwUnJYyNS4cYfKoGD/RAxN0xaAoXsl6u3FGzY7TjLsuf6Wn3vvzAkAmLGW6d+50lK2YztCGP3tB5fqMEALRjFKubUr6ZZk+0+jWFlMIaW88pZFyYunG8lPOuj9/d+d+W3KFcwmWfumRAkApho1OrSVWiQDvL6CleOk84A0TXOhuYBCwo213YDJOB7w46pWOa9fJR2I3OIqapQAwee3057/YqC64b3CrFiszAkEAttDMWhXlagXMjwZAjEuuHK3CVCqRPNhZlnoX5A5RWIg0+BpHNQDfVSlYBtki361zB8L3HR8YfJIOWk/4S+ORLg==";
  
  //#pubKeyText
  public final static String pubKeyText = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCYO23qMcvv0gpGs97rfmxITjjz5m/sjZ4JgYvPBs+JHwD/SCv7TJCEKVm4aXTEPTXRkN7LgUjQTnEGGS1JBY4zyqpnmJcfpNxWpdgAyE/4poMJ8rcZvqm14DOjNH+69mwpIdJkySHuzUCzQtMJ8GG2owNc9frTOpZozlcUWbGWfQIDAQAB";
}

一.驗證GitHub下的RSA工具類

1.https://github.com/openstack/xstatic-jsencrypt/blob/master/xstatic/pkg/jsencrypt/data/jsencrypt.js驗證方式是：在chrome瀏覽器打開，然后F12打開瀏覽器控制台，然后把這個頁在中的所有代碼復制到chrome的控制台中，接下來先做加密，然后把加密出來的串用私鑰做解密。

var encrypt=new JSEncrypt();  
encrypt.setPublicKey("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCYO23qMcvv0gpGs97rfmxITjjz5m/sjZ4JgYvPBs+JHwD/SCv7TJCEKVm4aXTEPTXRkN7LgUjQTnEGGS1JBY4zyqpnmJcfpNxWpdgAyE/4poMJ8rcZvqm14DOjNH+69mwpIdJkySHuzUCzQtMJ8GG2owNc9frTOpZozlcUWbGWfQIDAQAB");  
encrypt.encrypt("深圳,您好!");  

encrypt.setPrivateKey("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");  
encrypt.decrypt("W/RptylQvcl6YAFEizyR/ViApaUxzSAtgSQUlpVfToTg0RsdoGpWxnkdPHxj4a3qUTzmVgiEx3W6Ua5rUv9S2EChOtG3wCsI8ddHEN4MHjOIQeTaLtDzINJ6tWqgIk8XG7B/IsUrJmXdqIldxUrxsnBmwAu4VVjr3ClyV1HS8iY=");

2.https://github.com/travist/jsencrypt上下載zip包解壓，在bin目錄下有如下兩個文件，就是我們將用到的文件。

　　在chrome瀏覽器打開，然后F12打開瀏覽器控制台，然后把jsencrypt.js中的所有代碼復制到chrome的控制台中，然后先做加密，然后把加密出來的串用私鑰做解密，如下所示：

　　我們將這里加密出來的密碼串，放到Java的解密代碼運行，也是能正常解密出來的，如下所示：

二.用下載下來的jsencrypt.min.js做前端的加解密小工具

說明：jsencrypt.min.js是https://github.com/travist/jsencrypt上下載下來的bin目錄下的文件。

運行效果如下：

完整代碼如下：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <input id='pwd' placeholder="密碼"/>
    <button onclick="encryptPwd()">加密</button>
    <textarea
        id="result"
        style="display: block;margin-top: 50px;width: 300px; height: 200px;"
    ></textarea>
    <button onclick="decryptPwd()">解密</button>
    <input id='pPwd' placeholder="加解密后的密碼"/>
</body>
<script src="jsencrypt.min.js" type="text/javascript"></script>

<script>
    function $q(id) {
        return document.querySelector('#' + id);
    }

    function encryptPwd() {
        let pwd = $q('pwd').value;
        let encrypt = new JSEncrypt();
        encrypt.setPublicKey("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCYO23qMcvv0gpGs97rfmxITjjz5m/sjZ4JgYvPBs+JHwD/SCv7TJCEKVm4aXTEPTXRkN7LgUjQTnEGGS1JBY4zyqpnmJcfpNxWpdgAyE/4poMJ8rcZvqm14DOjNH+69mwpIdJkySHuzUCzQtMJ8GG2owNc9frTOpZozlcUWbGWfQIDAQAB");
        let res1 = encrypt.encrypt(pwd);
        //var ps= encodeURI(d).replace(/\+/g, '%2B');
        $q('result').value = res1;
    }

    function decryptPwd() {
        let result = $q('result').value;
        let jsEncrypt = new JSEncrypt();
        jsEncrypt.setPrivateKey("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");
        let res = jsEncrypt.decrypt(result);
        $q('pPwd').value = res;
    }
</script>
</html>

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