python加密文字处理器
助力毕业 人气:0这是一个类似于记事本的文字处理器。与正常的记事本不同的是,它会将文本文档进行加密,确保无法被常规的程序打开。
由于本人是一位业余编程爱好者,对于“python之禅”之类的规则比较不以为然,因此本程序代码也许有些许凌乱(当然不利于后期修改)。
这篇文章我早已发布过,但当时只给出了代码,并加了一些注释。现在,我希望在这里详细解释这个程序。我会分一个月或更久更新这篇文章,请读者耐心等待。
首先,对于一个适合我们广大中华儿女使用的程序,我们不可避免地要使用中文。这就需要对编码进行声明:
# coding:utf-8
然后,就到了模块导入的环节了。我们这里需要tkinter,windnd,os和sys。windnd可以用pip安装,tkinter则需要在安装python时勾选:
from tkinter import * from tkinter.filedialog import * from tkinter.messagebox import * import windnd import os import sys
接下来,我们会看到这样一段代码:
try: filename = sys.argv[1] except: filename = ""
这是干什么的呢?我们知道,对于exe程序,有一个“Open with”功能,也就是可以将拖动到exe文件或其快捷方式的文件打开。事实上,py文件也有这个功能,但是多数情况下这样操作后只能使程序正常运行,而不能对文件进行任何操作。而“sys.argv[1]”的作用就是,读取这个文件的路径信息。这样,我们就可以用open或sys库里的一些指令进行对文件的操作了。
def encryption(c, d): c = list(c + d) g=list(d) d=0 for i in g: d*=ord(i) d=round(abs(d)**0.5) f="0x" for i in c: e=str(ord(i)+d) d=round(300*(d**0.5)) f=f+e+"a" f=eval(f[:-1]) return (f) def decrypt(c,d): c=hex(int(c)) print(c) c=c[2:].split("a") z=d g = list(d) d = 0 for i in g: d *= ord(i) d = round(abs(d) ** 0.5) f="" for i in c: e = chr(int(i)-d) d = round(300 * (d ** 0.5)) f = f + e if f[-len(z):]==z: f=f[:-len(z)] return (f) else: c="bbc"+12
这一段就比较劲爆了。它定义了两个函数,一个用于加密,另外一个用于解密(顺便说一句,我英语不太好,有的函数或变量的名字可能比较古怪,请见谅)。
encryption是加密的函数(呃,这个应该叫做encrypt,我编这个程序时大脑有些短路,但既然已经这样了,也就不改了),它会将明文(输入的c)通过与密钥d有关的某些运算,得出一个十六进制数,然后将其转化为十进制。同时,为了确保解密结果唯一,将密钥一起连接在明文上,起校验作用。在这里,对于明文的每一个字符都会将加密过程中实际使用的密钥进行变动,因此基本是不可能通过字符出现频率的规律来破解的。由于密钥是字符,暴力拆解也基本不可能。
decrypt是解密,它大致就是encryption的逆操作,同时如果校验的结果有误,或是遇到其他解密失败的情况它会产生错误(因此使用时需要try-except,来确保程序不会退出,同时对解密失败的情况进行处理)。
接下来是基本的文件操作部分:
def mynew(aaa=1): global top, filename, textPad top.title("无标题 - 加密文本编辑器") filename = None textPad.delete(1.0, END) textPad.insert(1.0, "") def myopen(aaa=1): global filename,kkk filename = askopenfilename() if filename == "": filename = None else: top.title(os.path.basename(filename)+" - 加密文本编辑器") format=os.path.basename(filename)[os.path.basename(filename).find(".")+1:] textPad.delete(1.0, END) try: f = open(filename, 'rb') c = f.read() ccc = str(c)[2:-1] ccc.replace("\\","") textPad.insert(1.0,decrypt(ccc,format)) kkk=1 except: f.close() try: f = open(filename, 'r', encoding="gbk") try: c = f.read() except: f.close() f = open(filename, 'r', encoding="utf-8") c = f.read() textPad.insert(1.0, c) kkk = 0 except: f.close() f = open(filename, 'rb') c = f.read() textPad.insert(1.0, c) kkk=0 f.close() def mysave(aaa=1): global filename,kkk try: msg = textPad.get(1.0, 'end')[0:-1] if kkk==0: f = open(filename, 'w', encoding="utf-8") f.write(msg) else: f = open(filename, 'wb') fffff = str(encryption(msg, format)) fffff = eval("b'{}'".format(fffff)) print(fffff) f.write(fffff) f.close() except: mysaveas() def mysaveas(aaa=1): global filename f = asksaveasfilename(initialfile="无标题.txt") filename = f format = os.path.basename(filename)[os.path.basename(filename).find(".") + 1:] msg = textPad.get(1.0, 'end')[0:-1] if not format == "py" and not format=="bat" and not format == "pyw"and not format == "cmd": fh = open(filename, 'wb') fffff = str(encryption(msg, format)) fffff = eval("b'{}'".format(fffff)) print(fffff) fh.write(fffff) else: fh = open(filename, 'w', encoding="utf-8") fh.write(msg) fh.close() top.title(os.path.basename(f)+" - 加密文本编辑器") def opened(files): global filename,kkk ff = '\n'.join((item.decode('gbk') for item in files)) filename = ff if filename == "": filename = None else: top.title(os.path.basename(filename) + " - 加密文本编辑器") format = os.path.basename(filename)[os.path.basename(filename).find(".") + 1:] textPad.delete(1.0, END) try: f = open(filename, 'rb') c = f.read() ccc = str(c)[2:-1] ccc.replace("\\", "") textPad.insert(1.0, decrypt(ccc, format)) kkk = 1 except: f.close() try: f = open(filename, 'r', encoding="gbk") try: c = f.read() except: f.close() f = open(filename, 'r', encoding="utf-8") c = f.read() textPad.insert(1.0, c) kkk = 0 except: f.close() f = open(filename, 'rb') c = f.read() textPad.insert(1.0, c) kkk = 0 f.close() def mynew(aaa=1): global top, filename, textPad top.title("无标题 - 加密文本编辑器") filename = None textPad.delete(1.0, END) textPad.insert(1.0, "")
首先说mynew。这里有一个可选参数a,这是因为通过bind激活函数会输入一个参数(这点我非常反感),为了不让程序运行出错,就添加了一个可选参数。这个其实没啥好说。global后面是所需的全局变量,然后就是设置窗口名称、文件名称,并清空输入框,很简单,很明了。
def myopen(aaa=1): global filename,kkk filename = askopenfilename() if filename == "": filename = None else: top.title(os.path.basename(filename)+" - 加密文本编辑器") format=os.path.basename(filename)[os.path.basename(filename).find(".")+1:] textPad.delete(1.0, END) try: f = open(filename, 'rb') c = f.read() ccc = str(c)[2:-1] ccc.replace("\\","") textPad.insert(1.0,decrypt(ccc,format)) kkk=1 except: f.close() try: f = open(filename, 'r', encoding="gbk") try: c = f.read() except: f.close() f = open(filename, 'r', encoding="utf-8") c = f.read() textPad.insert(1.0, c) kkk = 0 except: f.close() f = open(filename, 'rb') c = f.read() textPad.insert(1.0, c) kkk=0 f.close()
然后就是myopen。“filename=askopenfilename()”就是,弹出一个选择打开的文件的窗口,并将结果存入filename。然后我们获取文件的后缀信息,作为解密所需的密钥。接下来,我们先尝试解密文件。如果执行中有错误,也就是无法解密,则用gbk编码正常打开,仍然打开失败,则使用utf-8。当然,如果都失败了,就用rb模式,也就是字节流的形式打开。
啊,越讲越上头,超过了我预期的篇幅……好了,现在先讲到这里,等待下一次更新吧(本人初二,因此接触电脑机会不多,更新嘛,自然是比较慢的。耐心等待!耐心等待!!!)!
完整的代码:
# coding:utf-8 from tkinter import * from tkinter.filedialog import * from tkinter.messagebox import * import windnd import os import sys kkk=1 try: filename = sys.argv[1] except: filename = "" def encryption(c, d): c = list(c + d) g=list(d) d=0 for i in g: d*=ord(i) d=round(abs(d)**0.5) f="0x" for i in c: e=str(ord(i)+d) d=round(300*(d**0.5)) f=f+e+"a" f=eval(f[:-1]) return (f) def decrypt(c,d): c=hex(int(c)) print(c) c=c[2:].split("a") z=d g = list(d) d = 0 for i in g: d *= ord(i) d = round(abs(d) ** 0.5) f="" for i in c: e = chr(int(i)-d) d = round(300 * (d ** 0.5)) f = f + e if f[-len(z):]==z: f=f[:-len(z)] return (f) else: c="bbc"+12 def mynew(aaa=1): global top, filename, textPad top.title("无标题 - 加密文本编辑器") filename = None textPad.delete(1.0, END) textPad.insert(1.0, "") def myopen(aaa=1): global filename,kkk filename = askopenfilename() if filename == "": filename = None else: top.title(os.path.basename(filename)+" - 加密文本编辑器") format=os.path.basename(filename)[os.path.basename(filename).find(".")+1:] textPad.delete(1.0, END) try: f = open(filename, 'rb') c = f.read() ccc = str(c)[2:-1] ccc.replace("\\","") textPad.insert(1.0,decrypt(ccc,format)) kkk=1 except: f.close() try: f = open(filename, 'r', encoding="gbk") try: c = f.read() except: f.close() f = open(filename, 'r', encoding="utf-8") c = f.read() textPad.insert(1.0, c) kkk = 0 except: f.close() f = open(filename, 'rb') c = f.read() textPad.insert(1.0, c) kkk=0 f.close() def mysave(aaa=1): global filename,kkk try: msg = textPad.get(1.0, 'end')[0:-1] if kkk==0: f = open(filename, 'w', encoding="utf-8") f.write(msg) else: f = open(filename, 'wb') fffff = str(encryption(msg, format)) fffff = eval("b'{}'".format(fffff)) print(fffff) f.write(fffff) f.close() except: mysaveas() def mysaveas(aaa=1): global filename f = asksaveasfilename(initialfile="无标题.txt") filename = f format = os.path.basename(filename)[os.path.basename(filename).find(".") + 1:] msg = textPad.get(1.0, 'end')[0:-1] if not format == "py" and not format=="bat" and not format == "pyw"and not format == "cmd": fh = open(filename, 'wb') fffff = str(encryption(msg, format)) fffff = eval("b'{}'".format(fffff)) print(fffff) fh.write(fffff) else: fh = open(filename, 'w', encoding="utf-8") fh.write(msg) fh.close() top.title(os.path.basename(f)+" - 加密文本编辑器") def opened(files): global filename,kkk ff = '\n'.join((item.decode('gbk') for item in files)) filename = ff if filename == "": filename = None else: top.title(os.path.basename(filename) + " - 加密文本编辑器") format = os.path.basename(filename)[os.path.basename(filename).find(".") + 1:] textPad.delete(1.0, END) try: f = open(filename, 'rb') c = f.read() ccc = str(c)[2:-1] ccc.replace("\\", "") textPad.insert(1.0, decrypt(ccc, format)) kkk = 1 except: f.close() try: f = open(filename, 'r', encoding="gbk") try: c = f.read() except: f.close() f = open(filename, 'r', encoding="utf-8") c = f.read() textPad.insert(1.0, c) kkk = 0 except: f.close() f = open(filename, 'rb') c = f.read() textPad.insert(1.0, c) kkk = 0 f.close() top = Tk() top.title("无标题 - 加密文本编辑器") top.geometry("1000x600+100+50") menubar = Menu(top) menubar.add_command(label="新建", command=mynew) menubar.add_command(label="打开", command=myopen) menubar.add_command(label="保存", command=mysave) menubar.add_command(label="另存为", command=mysaveas) menu = Menu(top, tearoff=False) menu.add_command(label="新建", accelerator="Ctrl+N", command=mynew) menu.add_command(label="打开", accelerator="Ctrl+O", command=myopen) menu.add_command(label="保存", accelerator="Ctrl+S", command=mysave) menu.add_command(label="另存为", accelerator="Ctrl+Shift+S", command=mysaveas) def command(event): menu.post(event.x_root, event.y_root) top['menu'] = menubar all=Frame(top) all.pack(expand=YES, fill=BOTH) textPad = Text(all,font=('宋体', 14), undo=True) if filename == "": filename = None textPad.insert(1.0, "") else: top.title(os.path.basename(filename) + " - 加密文本编辑器") format = os.path.basename(filename)[os.path.basename(filename).find(".") + 1:] textPad.delete(1.0, END) try: f = open(filename, 'rb') c = f.read() ccc = str(c)[2:-1] ccc.replace("\\", "") textPad.insert(1.0, decrypt(ccc, format)) kkk = 1 except: f.close() try: f = open(filename, 'r', encoding="gbk") try: c = f.read() except: f.close() f = open(filename, 'r', encoding="utf-8") c = f.read() textPad.insert(1.0, c) kkk = 0 except: f.close() f = open(filename, 'rb') c = f.read() textPad.insert(1.0, c) kkk = 0 f.close() scroll = Scrollbar(all) textPad.config(yscrollcommand=scroll.set) scroll.config(command=textPad.yview) scroll.pack(side=RIGHT, fill=Y) textPad.pack(expand=YES,side=RIGHT,fill=BOTH) top.bind("<Control-N>", mynew) top.bind("<Control-n>", mynew) top.bind("<Control-O>", myopen) top.bind("<Control-o>", myopen) top.bind("<Control-S>", mysave) top.bind("<Control-s>", mysave) top.bind("<Control-Shift-S>", mysaveas) top.bind("<Control-Shift-s>", mysaveas) top.bind("<Button-3>", command) windnd.hook_dropfiles(top,func=opened) top.mainloop()
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