解决爬虫登陆电信密码加密问题

你的名字 2022-06-13 02:17 282阅读 0赞

遇见问题：写爬虫抓取电信数据，在登陆时发现密码加密问题，扒出加密函数如下：

$.fn.aesEncrypt = function (n) {
            var t = CryptoJS.MD5("login.189.cn"),
                    i = CryptoJS.enc.Utf8.parse(t),
                    r = CryptoJS.enc.Utf8.parse("1234567812345678"),
                    u = CryptoJS.AES.encrypt(n, i, {iv: r });
    
            return u + ""
        };

解决办法：使用java自带执行js脚本的引擎，执行js脚本即可。代码如下：

aes.js

var aesEncrypt = function (password) {
        var t = CryptoJS.MD5("login.189.cn"), 
    	    i = CryptoJS.enc.Utf8.parse(t),
            r = CryptoJS.enc.Utf8.parse("1234567812345678"), 
    		u = CryptoJS.AES.encrypt(password, i, {iv: r});
        return u + ""
    };

CryptoJsUtil.java

public class CryptoJsUtil {
        private volatile static CryptoJsUtil cryptoJsUtil ;
        private CryptoJsUtil() {}
        private static synchronized void syncInit() {
              if (cryptoJsUtil == null) {
                  cryptoJsUtil = new CryptoJsUtil();
              }
        }
        public static CryptoJsUtil getInstance() {
                if(cryptoJsUtil == null){
                    syncInit();
            }
            return cryptoJsUtil;
        }
    
        /**
         * 加密电信密码
         * @param pwd 服务密码
         * @return 密文
         */
        public String encryptByAes(String pwd){
            ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
            String result ;
            try{
                String resourcePath = CryptoJsUtil.class.getClassLoader().getResource("").getPath();
                System.out.println(resourcePath);
                engine.eval(new FileReader(resourcePath+"static/js/crypto-js.js"));
                engine.eval(new FileReader(resourcePath+"static/js/dxAes.js"));
                Invocable invocable = (Invocable) engine;
                result = (String)invocable.invokeFunction("aesEncrypt", pwd);
            }catch (Exception e){
                throw new RuntimeException("CryptoJs 加密失败："+e.getMessage());
            }
            return result ;
        }
    }

CryptoJsUtilTest.java

public class CryptoJsUtilTest {
    
        @Test
        public void testEncryptByAes(){
            //电信服务密码加密
            System.out.println(CryptoJsUtil.getInstance().encryptByAes("989977"));
        }
    }

还要引用两个js文件：cipher-core.js、crypto-js.js

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