python tkinter 实现带界面(GUI)的RSA加密、签名

代码环境，python3.5.2

RSA加密的过程是：使用公钥加密，私钥解密

RSA签名的过程是：使用私钥签名，公钥验证

所以核心代码就是，生成公钥私钥，使用公钥私钥分别进行加密解密。

在实际编码的时候，使用python自带的RSA库，需要特别处理编码问题，因为默认的加密解密函数是接收bytes类型的数据。

加密的核心代码如下：

# -*- coding: utf-8 -*-
import rsa
import base64
(public_key, private_key) = rsa.newkeys(1024)
msg = "M2Crypto python关于RSA的库还是蛮多的，当然也可以直接用openSSLｑｗｅａｓａｓｄ１２３"
msg = msg.encode(encoding="utf-8")
encrypt_msg = rsa.encrypt(msg, public_key)

decrypt_msg = rsa.decrypt(encrypt_msg, private_key)
print("公钥:")
print(public_key.save_pkcs1().decode('utf8'))
print("\n私钥:")
print(private_key.save_pkcs1().decode('utf8'))
print("\n原始文本:")
print(msg.decode('utf8'))
print("\n加密后的文本:")
print(base64.encodebytes( encrypt_msg).decode('utf8'))
print("\n解密后的文本:")
print(decrypt_msg.decode('utf8'))

输出结果如下：

结合tkinter的代码如下，使用tkinter是因为绘制界面很简单：

# -*- coding:utf-8 -*-
from tkinter import *
import rsa
import base64

def GenerateKey():
    (public_key, private_key) = rsa.newkeys(1024)
    print("\n生成公钥："+public_key.save_pkcs1().decode('utf8'))
    print("\n生成私钥："+private_key.save_pkcs1().decode('utf8'))
    publicKeyText.delete(0.0, END)
    publicKeyText.insert(END, public_key.save_pkcs1().decode('utf8'))
    
    privateKeyText.delete(0.0, END)
    privateKeyText.insert(END, private_key.save_pkcs1().decode('utf8'))

def EncryptionByPublickey():           #用公钥加密
    public_key_str = publicKeyText.get("0.0", "end").encode(encoding="utf-8")
    public_key = rsa.PublicKey.load_pkcs1(public_key_str)
    
    entry_str = entryText.get("0.0", "end").encode(encoding="utf-8")
    
    encrypt_msg = rsa.encrypt(entry_str, public_key)
    print("公钥加密后的文本为：\n"+base64.encodebytes(encrypt_msg).decode('utf8'))
    outputText.delete(0.0, END)
    outputText.insert(END, base64.encodebytes(encrypt_msg).decode('utf8'))
    
def EncryptionByPrivatekey(): 
    private_key_str = privateKeyText.get("0.0", "end").encode(encoding="utf-8")
    private_key = rsa.PrivateKey.load_pkcs1(private_key_str)
    
    entry_str = entryText.get("0.0", "end").encode(encoding="utf-8")
    
    encrypt_msg = rsa.encrypt(entry_str, private_key)
    print("私钥加密后的文本为：\n"+base64.encodebytes(encrypt_msg).decode('utf8'))
    outputText.delete(0.0, END)
    outputText.insert(END, base64.encodebytes(encrypt_msg).decode('utf8'))  
    
def DeryptionByPublickey(): 
    public_key_str = privateKeyText.get("0.0", "end").encode(encoding="utf-8")
    public_key = rsa.PrivateKey.load_pkcs1(public_key_str)
    
    entry_str = entryText.get("0.0", "end").encode(encoding="utf-8")
    encrypt_msg = base64.decodebytes( entry_str)
    outputText.delete(0.0, END)
    
    try:
        decrypt_msg = rsa.decrypt(encrypt_msg, public_key)
        print("公钥解密后的文本为：\n"+decrypt_msg.decode('utf8'))
        outputText.insert(END,decrypt_msg.decode('utf8'))
    except:
        decrypt_msg = "公钥解密失败"
        print(decrypt_msg)
        outputText.insert(END,decrypt_msg)
def DecryptionByPrivatekey(): 
    private_key_str = privateKeyText.get("0.0", "end").encode(encoding="utf-8")
    private_key = rsa.PrivateKey.load_pkcs1(private_key_str)
    
    entry_str = entryText.get("0.0", "end").encode(encoding="utf-8")
    encrypt_msg = base64.decodebytes( entry_str)
    outputText.delete(0.0, END)
    
    try:
        decrypt_msg = rsa.decrypt(encrypt_msg, private_key)
        print("私钥解密后的文本为：\n"+decrypt_msg.decode('utf8'))
        outputText.insert(END,decrypt_msg.decode('utf8'))
    except:
        decrypt_msg = "私钥解密失败"
        print(decrypt_msg)
        outputText.insert(END,decrypt_msg)


window = Tk()    
window.title("RSA加密解密软件")

frame = Frame(window)
frame.pack()

label = Label(frame, text = "公钥：")
label.grid(row = 1, column = 1,columnspan= 4)

publicKeyText = Text(frame,width=50,height=8)
publicKeyText.grid(row = 2, column = 1,columnspan = 4)

label = Label(frame, text = "私钥：")
label.grid(row = 3, column = 1,columnspan= 4)

privateKeyText = Text(frame,width=50,height=12)
privateKeyText.grid(row = 4, column = 1,columnspan = 4)

btGenerateKey = Button(frame, text = "生成公钥/私钥",command=GenerateKey)
btGenerateKey.grid(row = 5, column = 1,columnspan = 4)

label = Label(frame, text = "请输入加密/解密的文本:")
label.grid(row = 6, column = 1,columnspan = 4)

entryText = Text(frame,width=50,height=5)
entryText.grid(row = 7, column = 1,columnspan = 4)

btEncryptionByPublickey = Button(frame, text = "公钥加密",command=EncryptionByPublickey)
btEncryptionByPublickey.grid(row = 8, column = 1,pady = 10)

btDeryptionByPublickey = Button(frame, text = "公钥解密",command=DeryptionByPublickey)
btDeryptionByPublickey.grid(row = 8, column = 2)

btEncryptionByPrivatekey = Button(frame, text = "私钥加密",command=EncryptionByPrivatekey)
btEncryptionByPrivatekey.grid(row = 8, column = 3)

btDecryptionByPrivatekey = Button(frame, text = "私钥解密",command=DecryptionByPrivatekey)
btDecryptionByPrivatekey.grid(row = 8, column = 4)

outputText = Text(frame,width=50,height=5)
outputText.grid(row = 9, column = 1,columnspan = 4)

print("欢迎使用本软件……")
GenerateKey();
mainloop()

print("欢迎再次使用本软件……")