Fix: Use symmetric key encryption in amitcrypto.py

amitcrypto.py

@@ -1,18 +1,31 @@
 from Crypto.Cipher import XOR
-
-key = "abcdefghijklij"
-xor = XOR.XORCipher(key) # To encrypt
-xor1 = XOR.XORCipher(key) # To decrypt
+ from Crypto.Cipher import AES
+ from Crypto.Util.Padding import pad, unpad
+ import os
+
+ key = b'abcdefghijklmnop'  # 16-byte key for AES-128
 
 def enc(sock, message, addr):
-    abcd = xor.encrypt(message)
-    print message == dec(sock, abcd, addr)
-    sock.sendto(abcd, addr)
-    return abcd
+     # Convert message to bytes if it's a string
+     if isinstance(message, str):
+         message_bytes = message.encode()
+     else:
+         message_bytes = message
+     iv = os.urandom(16)  # Generate random IV
+     cipher = AES.new(key, AES.MODE_CBC, iv)
+     padded_message = pad(message_bytes, AES.block_size)
+     ciphertext = cipher.encrypt(padded_message)
+     encrypted_data = iv + ciphertext
+     sock.sendto(encrypted_data, addr)
+     return encrypted_data
 
 def dec(sock, message, addr):
-    abcd = xor1.decrypt(message)
-    return abcd
+     iv = message[:16]
+     ciphertext = message[16:]
+     cipher = AES.new(key, AES.MODE_CBC, iv)
+     padded_plaintext = cipher.decrypt(ciphertext)
+     plaintext_bytes = unpad(padded_plaintext, AES.block_size)
+     return plaintext_bytes
 
 #message = "dfjsdfjsdfjdsfdfsk"
 #print message