密码学课程设计-混合加密

2023-11-25 23:01:52

密码学课程设计-混合加密

场景设置

Alice发送一个文件给Bob。文件使用AES加密。AES的密钥使用Bob的公钥加密，Bob使用私钥解密。(RSA)

目录

  1. 程序
  2. 运行
  3. 代码
程序

  • Alice端的文件

      Alice.py      Alice发送文件

  AES.py        AES

  RSA.py        RSA

  public.pem    Bob公钥   （可以自己生成）

  • Bob端的文件

      Bob.py       Bob接受文件

  decode.py    Bob解密文件

  RSA.py       RSA

  AES.py       AES

  private.pem  Bob私钥    （也可以使用python自带的函数生成）
运行截图

密码学课程设计-混合加密
密码学课程设计-混合加密

代码

Alice.py

#
#Alice端
#
import socket 
import struct
import os
import json
import AES
import RSA
import time
import base64
from tkinter import *
#软件界面


root = Tk()
root.geometry('450x500')
root.title('TK Hello Alice')
l1 = Label(root, text="ip")
l1.pack()
xls_text = StringVar()
xls = Entry(root, textvariable = xls_text)
xls_text.set("127.0.0.1")
xls.pack()

l2 = Label(root, text="port")
l2.pack()  
sheet_text = StringVar()
sheet = Entry(root, textvariable = sheet_text)
sheet_text.set("1234")
sheet.pack()

l3 = Label(root, text="Aes_key(16)")
l3.pack()  
loop_text = StringVar()
loop = Entry(root, textvariable = loop_text)
loop_text.set("keyskeyskeyskeys")
loop.pack()

l6 = Label(root, text="想要发送的文件")
l6.pack()  
loop1_text = StringVar()
loop1 = Entry(root, textvariable = loop1_text)
loop1_text.set("E:\\encodecc\\23.jpg")
loop1.pack()

l4 = Label(root, text="加密后的文件名")
l4.pack()  
loop2_text = StringVar()
loop2 = Entry(root, textvariable = loop2_text)
loop2_text.set("E:\\encodecc\\elsd")
loop2.pack()

l5 = Label(root, text="加密后的Aes_key")
l5.pack()
loop3_text = StringVar()
loop3 = Entry(root, textvariable = loop3_text)
loop3_text.set("E:\\encodecc\\Aes_key")
loop3.pack()
#config

#发送文件函数
def run(ip,port):
	client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
	client.connect((ip,port))
	print("connect success....")
	filepath = loop2_text.get()
	size =  os.stat(filepath).st_size
	f= struct.pack("l",os.stat(filepath).st_size)
	client.send(f)
	img = open(filepath,"rb")
	client.sendall(img.read())
	img.close()
	client.close()
#发送key函数
def run1(ip,port):
	client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
	client.connect((ip,port))
	print("connect success....")
	filepath = loop3_text.get()
	size =  os.stat(filepath).st_size
	f= struct.pack("l",os.stat(filepath).st_size)
	client.send(f)
	img = open(filepath,"rb")
	client.sendall(img.read())
	img.close()
	client.close()
#本地加密
def click():
	pc = AES.PrpCrypt(loop_text.get())
	with open(loop1_text.get(),'rb') as fw:
		tu = base64.b64encode(fw.read())
		fw.close()
	data = tu.decode()
	c = b''
	k = 0
	print('Encoding....')
	#AES加密文件
	for i in range(int(len(data)/120)):
		c = c + pc.encrypt(data[k:k+120])
		k = k+ 120
		if(int(i)%1000 == 0):
			print(str(100*(k+1)/int(len(data)))+'%')
	c = c + pc.encrypt(data[:-len(data)%120])
	with open(loop2_text.get(),'wb') as fq:
		fq.write(c)
		fq.close()
	a = RSA.rsaEncrypt(loop_text.get(),RSA.load_pubkey())
	with open(loop3_text.get(),"wb") as fe:
	    fe.write(a)
	    fe.close()
	run(xls_text.get(),int(sheet_text.get()))
	time.sleep(5)
	run1(xls_text.get(),int(sheet_text.get()))
Button(root, text="press", command = click).pack()
root.mainloop()

AES.py

#
#AES 函数文件
#

from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex
import base64
import RSA
#读取文件 返回字节流
def readfile(file):
    with open(file,'rb') as fp:
        tu = base64.b64encode(fp.read())
    fp.close()
    return(tu)

class PrpCrypt(object):
    def __init__(self, key):
        self.key = key.encode('utf-8')
        self.mode = AES.MODE_CBC
    #AES加密函数
    def encrypt(self, text):
        text = text.encode('utf-8')
        cryptor = AES.new(self.key, self.mode, b'0000000000000000')
        length = 16
        count = len(text)
        if count < length:
            add = (length - count)
            text = text + ('\0' * add).encode('utf-8')
        elif count > length:
            add = (length - (count % length))
            text = text + ('\0' * add).encode('utf-8')
        self.ciphertext = cryptor.encrypt(text)
        return b2a_hex(self.ciphertext)
    #AES解密函数
    def decrypt(self, text):
        cryptor = AES.new(self.key, self.mode, b'0000000000000000')
        plain_text = cryptor.decrypt(a2b_hex(text))
        return bytes.decode(plain_text).rstrip('\0')

RSA.py

import rsa

# rsa加密
def rsaEncrypt(str,pubkey):
    content = str.encode('utf-8')
    crypto = rsa.encrypt(content, pubkey)
    return (crypto)
# rsa解密
def rsaDecrypt(str, pk):
    content = rsa.decrypt(str, pk)
    con = content.decode('utf-8')
    return con
def load_pubkey():
    with open('public.pem', "rb") as publickfile:
        p = publickfile.read()
        pubkey = rsa.PublicKey.load_pkcs1(p)
        return pubkey
def load_privkey():
    with open('private.pem', "rb") as privatefile:
        p = privatefile.read()
        privkey = rsa.PrivateKey.load_pkcs1(p)
        return privkey

public.pem(公钥)

-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBALNizjNKI4w7Y2Ug2A7QwLP7HLEHWQTNCzATbpWXWgYw2knTd3ZiXjxj
vWqoaapkSHnloDZi915/jq6WvsE8w/dtUWxS+1J9NDxMDbKKxWIO0LN0MjmI0C6V
EBrOAFL/cJtvaPm66m2McSAPVYErAZVh60ABTYeILkpkI/YuJFjRAgMBAAE=
-----END RSA PUBLIC KEY-----

Bob.py

#服务器端
import socket
import struct
import os.path
from tkinter import *


root = Tk()
root.geometry('450x500')
root.title('TK Hello Bob')
l1 = Label(root, text="ip")
l1.pack()  
xls_text = StringVar()
xls = Entry(root, textvariable = xls_text)
xls_text.set("127.0.0.1")
xls.pack()

l2 = Label(root, text="port")
l2.pack()  
sheet_text = StringVar()
sheet = Entry(root, textvariable = sheet_text)
sheet_text.set("1234")
sheet.pack()
def run1(ip,port):
    server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server.bind((ip,port))
    server.listen(2)
    while True:
        print("start...")
        sock,adddr = server.accept()
        d = sock.recv(struct.calcsize("l"))
        total_size = struct.unpack("l",d)
        num  = total_size[0]//1024
        data = b''
        for i in range(num):
            data += sock.recv(1024)
        data += sock.recv(total_size[0]%1024)
        if os.path.exists("tupian"):
            with open("Aes_key","wb") as f:
                f.write(data)
        else:
            with open("tupian","wb") as f:
                f.write(data)
        sock.close()
    sock.close()
def click():
    q1 = Label(root, text="start...")
    q1.pack()  
    q2 = Label(root, text="file recv")
    q2.pack()
    run1(xls_text.get(),int(sheet_text.get()))
Button(root, text="press", command = click).pack()
root.mainloop()

decode.py

import RSA
import AES
import base64
from tkinter import *


root = Tk()
root.geometry('450x500')
root.title('TK Decode')
l1 = Label(root, text="Aes_key路径")
l1.pack()  #这里的side可以赋值为LEFT  RTGHT TOP  BOTTOM
xls_text = StringVar()
xls = Entry(root, textvariable = xls_text)
xls_text.set("E:\\encodecc\\Bob\\Aes_key")
xls.pack()

l2 = Label(root, text="待解密文件路径")
l2.pack()  #这里的side可以赋值为LEFT  RTGHT TOP  BOTTOM
sheet_text = StringVar()
sheet = Entry(root, textvariable = sheet_text)
sheet_text.set("E:\\encodecc\\Bob\\tupian")
sheet.pack()

l3 = Label(root, text="文件命名")
l3.pack()  #这里的side可以赋值为LEFT  RTGHT TOP  BOTTOM
loop_text = StringVar()
loop = Entry(root, textvariable = loop_text)
loop_text.set("E:\\encodecc\\Bob\\tupian.jpg")
loop.pack() 


def click(): 
	with open(xls_text.get(),"rb") as fe:
		fd = fe.read()
		fe.close()
	Aes_key = RSA.rsaDecrypt(fd, RSA.load_privkey())
	#print(Aes_key)
	pc = AES.PrpCrypt(Aes_key)
	with open(sheet_text.get(),'rb') as fq:
		pian = fq.read()
		fq.close()


	c = ''
	k = 0
	print('Decoding....')
	data = pian.decode()
	#print(len(data))
	if len(data)>=256:
		for i in range(int(len(data)/256)):
			bfg = pc.decrypt(data[k:k+256])
			k = k +256
			c = c + bfg
		c = c.encode()
		#print(c)
		tu_b = base64.b64decode(c)
		#print(tu_b)
		with open(loop_text.get(),'wb') as fq:
			fq.write(tu_b)
			fq.close()
		l1 = Label(root, text="ok you get it success")
		l1.pack()  #这里的side可以赋值为LEFT  RTGHT TOP  BOTTOM
	if len(data)<256:
		c = pc.decrypt(data)
		c = c.encode()
		#print(c)
		tu_b = base64.b64decode(c)
		#print(tu_b)
		with open(loop_text.get(),'wb') as fq:
			fq.write(tu_b)
			fq.close()
		l1 = Label(root, text="ok you get it success")
		l1.pack()  #这里的side可以赋值为LEFT  RTGHT TOP  BOTTOM
Button(root, text="press", command = click).pack()
root.mainloop()

private.pem（私钥）

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
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