python之app逆向破解headers中的Authorization 身份驗證 AES

下載好app 貝殼 2018-5-2 版本

1.還是先抓包

注冊入口

2.用jadx-gui打開

直接用jadx-gui打開,因為沒有加殼
並搜索關鍵字Authorization

點擊右鍵 查找用例

3.開始Hook

從以下可以看出: 由 Appid + COLON_SEPARATOR + c 組成的,最后 Base64
所以從第一個入參開始跟蹤
String encodeToString = Base64.encodeToString((GetAppId + Constants.COLON_SEPARATOR + DeviceUtil.c(sb.toString())).getBytes(), 2);

hook GetAppId 方法

得出Hook結果
多hook幾次,一看肯定是固定的,不會變的參數

hook GetAppSecret 方法

com.homelinkndk.lib.JniClient

得出Hook結果
同樣的道理,多hook幾次,也是不會變的參數

跟蹤 Constants.COLON_SEPARATOR

跟蹤之后,發現 COLON_SEPARATOR 其實是 ":"

hook c 方法

com.homelink.midlib.util.DeviceUtil

得出Hook結果
d5e343d453aecca8b14b2dc687c381camobile_phone_no=13918238341request_ts=1606964312
首先想到的是,先用這些參數md5 或者 sha 在線加密下看看結果是不是一樣的


通過在線加密方法得出 是SHA1 加密的結果
https://www.bejson.com/enc/sha/

4.用python實現

整個js 代碼

Java.perform(function () {
    console.log('HOOK Start!!!');
    var Des3Encrypt = Java.use("com.homelink.midlib.util.DeviceUtil");//
    console.log(Des3Encrypt);
    // 加密
    Des3Encrypt.c.overload('java.lang.String').implementation = function (args1) {
        console.log("encryptByPublicKey args1:",(args1));
        //console.log("encryptByPublicKey args2:",args2);
        //console.log("encryptByPublicKey args3:",args3);
        //console.log("Encrypt args4:",args4);
        var result1 = this.c(args1);
        console.log("encryptByPublicKey result1=",result1);
        return result1;
    };
    var Des3Encrypt = Java.use("com.homelinkndk.lib.JniClient");//
    console.log(Des3Encrypt);
    Des3Encrypt.GetAppId.overload('java.lang.Object').implementation = function (args1) {
    console.log("splitString args1:",args1);
    //console.log("encryptByPublicKey args2:",args2);
    //console.log("encryptByPublicKey args3:",args3);
    //console.log("encryptByPublicKey args4:",args4);
    var result2 = this.GetAppId(args1,args2);
    console.log("encryptByPublicKey result2=",result2);
    return result2;
    };

    // 加密
     var Des3Encrypt = Java.use("com.homelinkndk.lib.JniClient");//
    console.log(Des3Encrypt);
    Des3Encrypt.GetAppSecret.overload('java.lang.Object').implementation = function (args1) {
        console.log("encryptByPublicKey args1:",args1);
        //console.log("encryptByPublicKey args2:",args2);
        //console.log("encryptByPublicKey args3:",args3);
        //console.log("encryptByPublicKey args4:",args4);
        var result3 = this.GetAppSecret(args1);
        console.log("encryptByPublicKey result3=",result3);
        return result3;
    };

})

def get_str_sha1_secret_str(res:str):
    """
    使用sha1加密算法，返回str加密后的字符串
    """
    sha = hashlib.sha1(res.encode('utf-8'))
    encrypts = sha.hexdigest()
    # print(encrypts)
    return encrypts

phone = '15751786649'
pwd = 'shqushuiw'
t = '1606981326'
Authorization =base64.b64encode(f'20180111_android:{get_str_sha1_secret_str(f"d5e343d453aecca8b14b2dc687c381camobile_phone_no={phone}password={pwd}request_ts={t}")}'.encode())
# print(Authorization)

app下載地址
鏈接：https://pan.baidu.com/s/1iHZZEV9IxQS8kHfNjhl5jg 
提取碼：jsw8