frida_hook_java_template.ts

function log(message: string): void {
    console.log(message);
}

function hook_demo(){
    hook_java();
}

function hook_java() {
    Java.perform(function() {
        hook_Md5Utils();
    })
}

function hook_Md5Utils() {
    function hook_md5String() {
        let target_method = "md5String";
        cls[target_method].implementation = function () {
            let [text] = arguments;
            let md5_hex = this[target_method].apply(this, arguments);
            log(`[${TAG}.${target_method}] ${text} ${md5_hex}`);
            return md5_hex;
        }
    }
    function hook_md5File() {
        let target_method = "md5File";
        cls[target_method].implementation = function () {
            let [file] = arguments;
            let md5_hex = this[target_method].apply(this, arguments);
            log(`[${TAG}.${target_method}] ${file} ${md5_hex}`);
            return md5_hex;
        }
    }
    let target_class = "com.sfx.demo.Md5Utils";
    let TAG = target_class.split(".").pop();
    let cls = Java.use(target_class);
    hook_md5String();
    hook_md5File();
}