Update receiver_ui.py

receiver_ui.py

@@ -7,14 +7,23 @@
 # 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 base64
 
+from PyQt5.QtWidgets import QFileDialog,QMainWindow
+import socket
+from Crypto.Cipher import AES
+from binascii import b2a_hex, a2b_hex
+from Crypto.PublicKey import RSA
+from Crypto.Cipher import PKCS1_OAEP
+from Crypto.Signature import PKCS1_v1_5
+import hashlib
+from Crypto.Hash import SHA512
 from PyQt5 import QtCore, QtGui, QtWidgets
 import sys
 import json
 from gmssl import sm4, func,sm2,sm3
 from PyQt5.QtWidgets import QMessageBox,QFileDialog
-import socket
+#import sm2random
-import sm2random
 from OpenSSL import crypto
 class Ui_MainWindow(object):
     def setupUi(self, MainWindow,client):
@@ -60,6 +69,7 @@ class Ui_MainWindow(object):
         self.mode = ""
         self.algorithm = ""
         self.enc_key = ""
+
         #打开文件选择对话框
         QMessageBox.information(MainWindow, "提示", "请选择你的私钥文件")
         path=QFileDialog.getOpenFileName()[0]
@@ -110,22 +120,59 @@ class Ui_MainWindow(object):
         self.decrypt_key()
         self.decrypt()
         self.client.close()
+    def receive(self):
+        #接收信封并解封保存，加密后的对称密钥，密文，签名
+        data = b""
+        while True:
+            envelope_dict = self.client.recv(1024)
+            if not envelope_dict:
+                break
+            data += envelope_dict
+            # print(data.decode())
+        envelope_dict = json.loads(data.decode('utf-8'))
+        self.signature= envelope_dict['signature']
+        self.encrypted_text = envelope_dict['encrypted_text']
+        self.enc_key = envelope_dict['enc_key']
+        self.mode= envelope_dict['mode']
+        self.algorithm= envelope_dict['algorithm']
+        if self.mode=="CBC":
+            self.iv= envelope_dict['iv']
+        self.decrypt_key()
+        self.decrypt()
     def decrypt_key(self):
-        #使用sm2私钥解密对称密钥self.enc_key,赋给self.key
+        #使用rsa私钥解密对称密钥self.enc_key,赋给self.key
-        sm2_crypt = sm2.CryptSM2(private_key=self.private_key,public_key=self.public_key,)
+        cipher_rsa = PKCS1_OAEP.new(self.private_key)
-        try:
+        self.key = cipher_rsa.decrypt(f.read())
-            self.key = sm2_crypt.decrypt(self.enc_key)
-            print("key:",self.key)
-        except Exception as e:
-            print(f"[!] Failed to decrypt SM4 key: {e}")
-            raise
     def decrypt(self):
         #根据模式和加密算法解密
+        # self.algorithm = self.algorithm_box.currentText()
+        # self.mode = self.mode_box.currentText()
+        self.algorithm = "AES"
+        self.mode = "CBC"
+        with open("aeskey.txt",'rb') as f:
+            self.key = "1234567890abcdef".encode("utf-8")
         if self.algorithm=="AES":
             if self.mode=="CBC":
-                pass
+                self.mode = AES.MODE_CBC
+                with open("ciphertext.bin", "rb") as f:
+                    self.encrypted_text = f.read()
+                    
+                cryptor = AES.new(self.key, self.mode, self.key)
+                plain_text = cryptor.decrypt(a2b_hex(self.encrypted_text))
+                #print(plain_text)
+                plaintext = b2a_hex(plain_text.rstrip(b'\0')).decode("utf-8")
+                self.textBrowser.append(plaintext)
+                
             elif self.mode=="ECB":
-                pass
+                self.mode = AES.MODE_ECB
+                with open("ciphertext.bin", "rb") as f:
+                    self.encrypted_text = f.read()
+                cryptor = AES.new(self.key, self.mode)
+                plain_text = cryptor.decrypt(a2b_hex(self.encrypted_text))
+                #print(plain_text)
+                plaintext = b2a_hex(plain_text.rstrip(b'\0')).decode("utf-8")
+                self.textBrowser.append(plaintext)
+                
             else:
                 print("error")
         elif self.algorithm=="SM4":
@@ -150,8 +197,23 @@ class Ui_MainWindow(object):
         else:
             print("error")
     def verify(self):
-        pass
         #使用对方公钥验证签名
+        plaintext = """zhangruixiazhangruixiazhangruixia
+        helloguet
+        hellopython
+        helloworld"""
+        key = RSA.importKey(self.private_key)
+        data = hashlib.sha512(plaintext.encode("utf-8")).hexdigest()
+        h = SHA512.new(data.encode("utf-8"))
+        #print(h)
+        verifier = PKCS1_v1_5.new(key)
+        with open("digitalsign.bin", "rb") as f:
+            signature = f.read()
+        signature = signature.decode("utf-8")
+        if verifier.verify(h, base64.b64decode(signature)):
+            self.textBrowser.append("验证成功")
+        else:
+            self.textBrowser.append("验证失败")
 if  __name__ == "__main__":
     app = QtWidgets.QApplication(sys.argv)
     window = QtWidgets.QMainWindow()