PHP 和 Web 端對稱加密傳輸|JSEncrypt|CryptoJS

不忘初心發表於2018-03-08

PHPWeb加密JS

前後端對稱加密傳輸

JSEncrypt

Git地址:https://github.com/travist/jsencrypt

首先這個包需要提前生成公鑰私鑰和依賴 openssl

注意:

明文長度最大為公鑰長度-11，假如我的公鑰長度是128，那明文最長也就117

如果需要加密解密長文字,請看下一種前後端對稱加解密方式

這個庫是與openssl一起工作。

如何使用這個庫:

在您的終端（基於Unix的作業系統）中輸入以下內容。

openssl genrsa -out rsa_1024_priv.pem 1024

這會生成一個私鑰，您可以透過執行以下操作來看到...

cat rsa_1024_priv.pem

然後，您可以將其複製並貼上到index.html中的私鑰部分。
接下來，您可以透過執行以下命令獲取公鑰。

openssl rsa -pubout -in rsa_1024_priv.pem -out rsa_1024_pub.pem

您可以透過鍵入...來檢視公鑰

cat rsa_1024_pub.pem

前端加密解密的寫法如下:

<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<script src="bin/jsencrypt.min.js"></script>
<script type="text/javascript">
$(function () {
    //被加密的資訊
    var data = 'my message';

    //公鑰
    var pub_key = '-----BEGIN PUBLIC KEY-----\n' +
        'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDlOJu6TyygqxfWT7eLtGDwajtN\n' +
        'FOb9I5XRb6khyfD1Yt3YiCgQWMNW649887VGJiGr/L5i2osbl8C9+WJTeucF+S76\n' +
        'xFxdU6jE0NQ+Z+zEdhUTooNRaY5nZiu5PgDB0ED/ZKBUSLKL7eibMxZtMlUDHjm4\n' +
        'gwQco1KRMDSmXSMkDwIDAQAB\n' +
        '-----END PUBLIC KEY-----';

    //私鑰
    var private_key = '-----BEGIN RSA PRIVATE KEY-----\n' +
        'MIICXQIBAAKBgQDlOJu6TyygqxfWT7eLtGDwajtNFOb9I5XRb6khyfD1Yt3YiCgQ\n' +
        'WMNW649887VGJiGr/L5i2osbl8C9+WJTeucF+S76xFxdU6jE0NQ+Z+zEdhUTooNR\n' +
        'aY5nZiu5PgDB0ED/ZKBUSLKL7eibMxZtMlUDHjm4gwQco1KRMDSmXSMkDwIDAQAB\n' +
        'AoGAfY9LpnuWK5Bs50UVep5c93SJdUi82u7yMx4iHFMc/Z2hfenfYEzu+57fI4fv\n' +
        'xTQ//5DbzRR/XKb8ulNv6+CHyPF31xk7YOBfkGI8qjLoq06V+FyBfDSwL8KbLyeH\n' +
        'm7KUZnLNQbk8yGLzB3iYKkRHlmUanQGaNMIJziWOkN+N9dECQQD0ONYRNZeuM8zd\n' +
        '8XJTSdcIX4a3gy3GGCJxOzv16XHxD03GW6UNLmfPwenKu+cdrQeaqEixrCejXdAF\n' +
        'z/7+BSMpAkEA8EaSOeP5Xr3ZrbiKzi6TGMwHMvC7HdJxaBJbVRfApFrE0/mPwmP5\n' +
        'rN7QwjrMY+0+AbXcm8mRQyQ1+IGEembsdwJBAN6az8Rv7QnD/YBvi52POIlRSSIM\n' +
        'V7SwWvSK4WSMnGb1ZBbhgdg57DXaspcwHsFV7hByQ5BvMtIduHcT14ECfcECQATe\n' +
        'aTgjFnqE/lQ22Rk0eGaYO80cc643BXVGafNfd9fcvwBMnk0iGX0XRsOozVt5Azil\n' +
        'psLBYuApa66NcVHJpCECQQDTjI2AQhFc1yRnCU/YgDnSpJVm1nASoRUnU8Jfm3Oz\n' +
        'uku7JUXcVpt08DFSceCEX9unCuMcT72rAQlLpdZir876\n' +
        '-----END RSA PRIVATE KEY-----';

    //new JSEncrypt
    var js_encrypt = new JSEncrypt();
    //初始化公鑰
    js_encrypt.setPublicKey(pub_key);
    //初始化私鑰
    js_encrypt.setPrivateKey(private_key);

    //透過 公鑰 加密
    var encrypted = js_encrypt.encrypt(data);
    console.log(encrypted);

    //透過 私鑰 解密
    var uncrypted = js_encrypt.decrypt(encrypted);
    console.log(uncrypted);
});
</script>

對應PHP後臺加密解密的寫法如下:

class Encrypt
{
    const JS_ENCRYPT = '-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDlOJu6TyygqxfWT7eLtGDwajtN
FOb9I5XRb6khyfD1Yt3YiCgQWMNW649887VGJiGr/L5i2osbl8C9+WJTeucF+S76
xFxdU6jE0NQ+Z+zEdhUTooNRaY5nZiu5PgDB0ED/ZKBUSLKL7eibMxZtMlUDHjm4
gwQco1KRMDSmXSMkDwIDAQAB
-----END PUBLIC KEY-----';

    const JS_DECRYPT = '-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';

    /**
     * 解密
     *
     * @param string $encryptString
     *
     * @return bool|string
     */
    public static function privateDecrypt($encryptString = '')
    {
        $decrypted  = '';
        $privateKey = self::JS_DECRYPT;
        openssl_private_decrypt(base64_decode($encryptString), $decrypted, $privateKey);

        return $decrypted;
    }

    /**
     * 加密
     *
     * @param string $data
     *
     * @return bool|string
     */
    public static function publicEncrypt($data = '')
    {
        $encrypt_data = '';
        openssl_public_encrypt($data, $encrypt_data, self::JS_ENCRYPT);
        $encrypt_data = base64_encode($encrypt_data);

        return $encrypt_data;
    }
}

如果出現了以下情況
opensll_public_encrypt() :key parameter is not a valid public key in /www/xxxxxx.php on line 123

class Encrypt
{
    public function publicEncrypt()
    {
        $password  = "habx-2018";
        $key       = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDlOJu6TyygqxfWT7eLtGDwajtNFOb9I5XRb6khyfD1Yt3YiCgQWMNW649887VGJiGr/L5i2osbl8C9+WJTeucF+S76xFxdU6jE0NQ+Z+zEdhUTooNRaY5nZiu5PgDB0ED/ZKBUSLKL7eibMxZtMlUDHjm4gwQco1KRMDSmXSMkDwIDAQAB";
        $key_eol   = (string) implode("\n", str_split((string) $key, 64));
        $publicKey = (string) "-----BEGIN PUBLIC KEY-----\n" . $key_eol . "\n-----END PUBLIC KEY-----";

        openssl_public_encrypt($password, $encryptData, $publicKey, OPENSSL_PKCS1_PADDING);
        $encryptData = base64_encode($encryptData);

        print_r("encryptData=============" . $encryptData);

        return $encryptData;
    }
}

(new Encrypt())->publicEncrypt();

使用

$key_eol   = (string) implode("\n", str_split((string) $key, 64));
$publicKey = (string) "-----BEGIN PUBLIC KEY-----\n" . $key_eol . "\n-----END PUBLIC KEY-----";

把KEY按照64位增加一個 \n的方式處理

CryptoJS

Git地址:https://github.com/brix/crypto-js

文件地址:https://code.google.com/archive/p/crypto-j...

注意:

明文長度沒有限制但是加密的文字也會隨之變長

這個庫也是與openssl一起工作。