Start
整体生成的Serial算法比较简单，取输入Name的长度，乘固定值0x17CFB放到EDI中，然后调用rtcAnsiValueBstr取Name第一个字符的ASCII码加进EDI中，最后将EDI的值转成字符
最终对输入的Serial和计算得到的Serial进行比较：
很明显，Serial是错的，所以到这里跳转会实现，最终弹出You Get Wrong:
那么爆破的思路就是把je用nop填充或者将je改成jne就可以了，这里不再做演示。
编写注册机
由上面的分析可以得到Serial的算法：ord(Name[0]) + len(Name) * 0x17CFB
这里可以加大序列号的随机范围，所以可以将Name的长度范围设为4, 10
random.sample(string.ascii_letters + string.digits, random.randint(4,10))整体框架与CrackMe01没啥区别：
crackeMe02.py:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'crackeMe01.ui'
#
# Created by: PyQt5 UI code generator 5.15.2
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again. Do not edit this file unless you know what you are doing.
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(500, 300)
MainWindow.setMinimumSize(QtCore.QSize(500, 260))
MainWindow.setMaximumSize(QtCore.QSize(500, 260))
font = QtGui.QFont()
font.setFamily("微软雅黑")
font.setPointSize(10)
MainWindow.setFont(font)
MainWindow.setMouseTracking(False)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(140, 160, 201, 71))
font = QtGui.QFont()
font.setFamily("微软雅黑")
font.setPointSize(10)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
self.textEdit.setGeometry(QtCore.QRect(150, 30, 281, 41))
self.textEdit.setObjectName("textName")
self.textEdit_2 = QtWidgets.QTextEdit(self.centralwidget)
self.textEdit_2.setGeometry(QtCore.QRect(150, 90, 281, 41))
self.textEdit_2.setObjectName("textSerial")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(51, 44, 81, 21))
font = QtGui.QFont()
font.setFamily("Cascadia Code PL")
font.setPointSize(10)
self.label.setFont(font)
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(50, 100, 72, 15))
font = QtGui.QFont()
font.setFamily("Cascadia Code PL")
font.setPointSize(10)
self.label_2.setFont(font)
self.label_2.setObjectName("label_2")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 500, 29))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "CrackeMe02注册机"))
self.pushButton.setText(_translate("MainWindow", "生成注册码"))
self.label.setText(_translate("MainWindow", "Name:"))
self.label_2.setText(_translate("MainWindow", "Serial:"))
main.py:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'main.py'
#
# Created by: PyQt5 UI code generator 5.15.2
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again. Do not edit this file unless you know what you are doing.
import sys
import random
import string
from PyQt5.QtWidgets import QApplication, QMainWindow
from crackMe02 import Ui_MainWindow
class MyMainWindow(QMainWindow, Ui_MainWindow):
serial_prefix = 'AKA-'
name = ''
serial = ''
def __init__(self, parent=None):
super(MyMainWindow, self).__init__(parent)
self.setupUi(self)
self.pushButton.clicked.connect(self.generate_name_serial)
def generate_name(self):
return ''.join(random.sample(string.ascii_letters + string.digits, random.randint(4,10)))
def generate_serial(self, name):
return self.serial_prefix + str(ord(name[0]) + len(name) * 0x17cfb)
def generate_name_serial(self):
self.name = self.generate_name()
self.serial = self.generate_serial(self.name)
self.textEdit.setText(self.name)
self.textEdit_2.setText(self.serial)
if __name__ == '__main__':
app = QApplication(sys.argv)
myWin = MyMainWindow()
myWin.show()
sys.exit(app.exec_())
最终：
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