安卓逆向半次元app逆向分析源码

# -*- coding: utf-8 -*-
import frida, sys
def on_message(message, data):
    if message['type'] == 'send':
        print("[*] {0}".format(message['payload']))
    else:
        print(message)
jscode_hook = """
    Java.perform(
        function(){
            var en = Java.use("com.banciyuan.bcywebview.utils.encrypt.Encrypt");
            en.a.overload("java.lang.String").implementation = function (str){
                console.log("参数: "+str);
                var res = this.a(str);
                console.log("返回: "+res);
                return res;
            }
        }

    )
"""
process = frida.get_usb_device().attach('com.banciyuan.bcywebview')
script = process.create_script(jscode_hook)
script.on('message', on_message)
print('[*] Hook Start Running')
script.load()
sys.stdin.read()

# -*- coding:utf-8 -*-
import base64
from Crypto.Cipher import AES
class EncryptDate:
    def __init__(self, key):
        self.key = key  # 初始化密钥
        self.length = 16  # 初始化数据块大小
        self.aes = AES.new(self.key, AES.MODE_ECB)  # 初始化AES,ECB模式的实例
        # 截断函数，去除填充的字符
        self.unpad = lambda date: date[0:-ord(date[-1])]
        print(self.unpad)  
    def pad(self, text):
        """
        #填充函数，使被加密数据的字节码长度是block_size的整数倍
        """
        count = len(text.encode('utf-8'))
        add = self.length - (count % self.length)
        entext = text + (chr(add) * add)
        return entext
    def encrypt(self, encrData):  # 加密函数
        a = self.pad(encrData)
        res = self.aes.encrypt(a.encode("utf-8"))
        msg = str(base64.b64encode(res), encoding="utf8")
        return msg
    def decrypt(self, decrData):  # 解密函数
        res = base64.decodebytes(decrData.encode("utf-8"))
        msg = self.aes.decrypt(res).decode("utf-8")
        return self.unpad(msg)
eg = EncryptDate("com_banciyuan_AI".encode("utf-8"))
res = eg.encrypt('{"uid":3526863969856576,"face":"f"}')
print(res)
print(eg.decrypt(res))