2022秋季信息安全实验1

实验1.1

(1) 加密后的密文：vhfxulwb
(2) 解密函数：d(a)=(a-k+26)mod 26
(3) 编程实现：界面类似于下图中的界面，语言工具语言不限，但要说明开发运行环境，如Python3、VC6、Java SE 8等等。
开发运行环境说明：Python3

import PySimpleGUI as simpleGui
import datetime


def dealMainWindowOpenWindowEvent(window2):
    try:
        if not window2:
            window2 = make_window2()
            window2.make_modal()  # 这行代码把当前窗口设置为有模式的
    except Exception as result:
        print("函数 dealMainWindowEvent 捕捉到异常:%s" % result)
    return window2


def dealMainWindowEncryptEvent(values):
    try:
        text = values['keyMainWindowPlaintext']
        if text.strip() == "":
            simpleGui.popup_error("提示", "请先输入明文！")
        else:
            # simpleGui.popup("提示", "请自己实现加密函数！")
            s=""
            text=list(map(str,text))
            for i in range(len(text)):
                text[i]=chr((ord(text[i]) - ord('a') + int(values['keyMainWindowKey'])) % 26 + ord('a'))
                s+=text[i]
            return s

    except Exception as result:
        print("函数 dealMainWindowEvent 捕捉到异常:%s" % result)

def dealMainWindowDecryptEvent(values):
    try:
        text = values['keyMainWindowCiphertext']
        if text.strip() == "":
            simpleGui.popup_error("提示", "请先输入密文！")
        else:
            # simpleGui.popup("提示", "请自己实现加密函数！")
            s = ""
            text = list(map(str, text))
            for i in range(len(text)):
                text[i] = chr((ord(text[i]) - ord('a') -int(values['keyMainWindowKey'])+26) % 26 + ord('a'))
                s += text[i]
            return s

    except Exception as result:
        print("函数 dealMainWindowEvent 捕捉到异常:%s" % result)

def dealWindow2OkEvent(window2, values):
    newText = ""
    try:
        newText = values['keyWindow2ulText']
        window2.close()
        window2 = None
    except Exception as result:
        print("函数 dealWindow2Event 捕捉到异常:%s" % result)
    return window2, newText


def make_window2():
    try:
        # 创建 window2 布局
        window2Layout = [
            [simpleGui.Text('文本'), simpleGui.Input('新窗口默认文本 hello gui。', key='keyWindow2ulText')],
            [simpleGui.Button('确定', key='keyWindow2Ok'), simpleGui.Button('取消', key='keyWindow2Cancel')]
        ]
        window2 = simpleGui.Window("打开新窗口", window2Layout, finalize=True)
        return window2
    except Exception as result:
        print("make_window2 捕捉到异常:%s" % result)


def main():
    try:
        # 创建 mainWindow 布局
        mainWindowLayout = [
            [simpleGui.Text('明文'), simpleGui.Input(key='keyMainWindowPlaintext', size=(80, 1)), ],
            [simpleGui.Text('密钥'), simpleGui.Input(key='keyMainWindowKey', size=(80, 1)), ],
            [simpleGui.Text('密文'), simpleGui.Input(key='keyMainWindowCiphertext', size=(80, 1)), ],
            [simpleGui.Text('文本'), simpleGui.Multiline(key='keyMainWindowMulText', size=(80, 8))],
            [simpleGui.Button('加密', key='keyMainWindowEncrypt'),
             simpleGui.Button('解密', key='keyMainWindowDecrypt'),
             simpleGui.Button('打开新窗口', key='keyMainWindowOpenWindow'), ],
            [simpleGui.Button('确定', key='keyMainWindowOk'), simpleGui.Button('取消', key='keyMainWindowCancel')],
        ]

        # 创建窗口，引入布局，并进行初始化。
        mainWindow = simpleGui.Window('对称加密演示程序', layout=mainWindowLayout, finalize=True)

        # 暂时先不创建window2
        window2 = None

        # 创建一个事件循环，否则窗口运行一次就会被关闭。
        while True:
            window, event, values = simpleGui.read_all_windows()
            print(window, event, values)  # 可以打印一下着看变量的内容
            if window == mainWindow:
                if event in (simpleGui.WIN_CLOSED,  'keyMainWindowOk', 'keyMainWindowCancel'):
                    break
                elif event == 'keyMainWindowOpenWindow':
                    window2 = dealMainWindowOpenWindowEvent(window2)
                elif event == 'keyMainWindowEncrypt':
                    min=dealMainWindowEncryptEvent(values)
                    mainWindow['keyMainWindowCiphertext'].update(min)
                elif event == 'keyMainWindowDecrypt':
                     # simpleGui.popup("提示", "请自己实现解密函数！")
                     max=dealMainWindowDecryptEvent(values)
                     mainWindow['keyMainWindowMulText'].update(max)
            if window == window2:
                if event in (simpleGui.WIN_CLOSED, 'keyWindow2Cancel'):
                    window2.close()
                    window2 = None
                elif event == 'keyWindow2Ok':
                    window2, newText = dealWindow2OkEvent(window2, values)
                    text = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') + "\n从window2获得文本:\n" + newText
                    mainWindow['keyMainWindowMulText'].update(text)
        # 关闭窗口
        mainWindow.close()
        if window2 is not None:
            window2.close()
    except Exception as result:
        print("函数 main 捕捉到异常:%s" % result)


if __name__ == '__main__':
    main()
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实验1.2

(1) 加密后的密文：hrlnedkz
(2) 解密函数：d=(9(m-5)) mod 26*
(3) 编程实现：界面类似于下图中的界面，语言工具语言不限，但要说明开发运行环境，如Python3、VC6、Java SE 8等等。
开发运行环境说明：Python3

import PySimpleGUI as simpleGui
import datetime


def dealMainWindowOpenWindowEvent(window2):
    try:
        if not window2:
            window2 = make_window2()
            window2.make_modal()  # 这行代码把当前窗口设置为有模式的
    except Exception as result:
        print("函数 dealMainWindowEvent 捕捉到异常:%s" % result)
    return window2


def dealMainWindowEncryptEvent(values):
    try:
        text = values['keyMainWindowPlaintext']
        if text.strip() == "":
            simpleGui.popup_error("提示", "请先输入明文！")
        else:
            # simpleGui.popup("提示", "请自己实现加密函数！")
            s=""
            text=list(map(str,text))
            for i in range(len(text)):
                text[i]=chr((3*(ord(text[i])- ord('a'))+5) % 26 + ord('a'))
                s+=text[i]
            return s

    except Exception as result:
        print("函数 dealMainWindowEvent 捕捉到异常:%s" % result)

def dealMainWindowDecryptEvent(values):
    try:
        text = values['keyMainWindowCiphertext']
        if text.strip() == "":
            simpleGui.popup_error("提示", "请先输入密文！")
        else:
            # simpleGui.popup("提示", "请自己实现解密函数！")
            s = ""
            text = list(map(str, text))
            for i in range(len(text)):
                text[i] = chr((((ord(text[i])- ord('a'))-5)*9) % 26 + ord('a'))
                s += text[i]
            return s

    except Exception as result:
        print("函数 dealMainWindowEvent 捕捉到异常:%s" % result)

def dealWindow2OkEvent(window2, values):
    newText = ""
    try:
        newText = values['keyWindow2ulText']
        window2.close()
        window2 = None
    except Exception as result:
        print("函数 dealWindow2Event 捕捉到异常:%s" % result)
    return window2, newText


def make_window2():
    try:
        # 创建 window2 布局
        window2Layout = [
            [simpleGui.Text('文本'), simpleGui.Input('新窗口默认文本 hello gui。', key='keyWindow2ulText')],
            [simpleGui.Button('确定', key='keyWindow2Ok'), simpleGui.Button('取消', key='keyWindow2Cancel')]
        ]
        window2 = simpleGui.Window("打开新窗口", window2Layout, finalize=True)
        return window2
    except Exception as result:
        print("make_window2 捕捉到异常:%s" % result)


def main():
    try:
        # 创建 mainWindow 布局
        mainWindowLayout = [
            [simpleGui.Text('明文'), simpleGui.Input(key='keyMainWindowPlaintext', size=(80, 1)), ],
            # [simpleGui.Text('密钥'), simpleGui.Input(key='keyMainWindowKey', size=(80, 1)), ],
            [simpleGui.Text('密文'), simpleGui.Input(key='keyMainWindowCiphertext', size=(80, 1)), ],
            [simpleGui.Text('文本'), simpleGui.Multiline(key='keyMainWindowMulText', size=(80, 8))],
            [simpleGui.Button('加密', key='keyMainWindowEncrypt'),
             simpleGui.Button('解密', key='keyMainWindowDecrypt'),
             simpleGui.Button('打开新窗口', key='keyMainWindowOpenWindow'), ],
            [simpleGui.Button('确定', key='keyMainWindowOk'), simpleGui.Button('取消', key='keyMainWindowCancel')],
        ]

        # 创建窗口，引入布局，并进行初始化。
        mainWindow = simpleGui.Window('对称加密演示程序', layout=mainWindowLayout, finalize=True)

        # 暂时先不创建window2
        window2 = None

        # 创建一个事件循环，否则窗口运行一次就会被关闭。
        while True:
            window, event, values = simpleGui.read_all_windows()
            print(window, event, values)  # 可以打印一下着看变量的内容
            if window == mainWindow:
                if event in (simpleGui.WIN_CLOSED,  'keyMainWindowOk', 'keyMainWindowCancel'):
                    break
                elif event == 'keyMainWindowOpenWindow':
                    window2 = dealMainWindowOpenWindowEvent(window2)
                elif event == 'keyMainWindowEncrypt':
                    min=dealMainWindowEncryptEvent(values)
                    mainWindow['keyMainWindowCiphertext'].update(min)
                elif event == 'keyMainWindowDecrypt':
                     # simpleGui.popup("提示", "请自己实现解密函数！")
                     max=dealMainWindowDecryptEvent(values)
                     mainWindow['keyMainWindowMulText'].update(max)
            if window == window2:
                if event in (simpleGui.WIN_CLOSED, 'keyWindow2Cancel'):
                    window2.close()
                    window2 = None
                elif event == 'keyWindow2Ok':
                    window2, newText = dealWindow2OkEvent(window2, values)
                    text = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') + "\n从window2获得文本:\n" + newText
                    mainWindow['keyMainWindowMulText'].update(text)
        # 关闭窗口
        mainWindow.close()
        if window2 is not None:
            window2.close()
    except Exception as result:
        print("函数 main 捕捉到异常:%s" % result)


if __name__ == '__main__':
    main()
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