fix circular dependency

server/netwrapper.py

@@ -8,12 +8,12 @@ from Crypto.PublicKey.RSA import RsaKey
 from Crypto.Random import get_random_bytes
 
 from netsim import network_interface
-from server import Server
+from authentication import Authetication
 
 
 class NetWrapper:
 
-    def __init__(self, clientPublicKey: dict, serverPrivateKey: RsaKey, serverInstance: Server):
+    def __init__(self, clientPublicKey: dict, serverPrivateKey: RsaKey, authenticationInstance: Authetication):
         self.clientPublicKey = clientPublicKey
         self.currentClientPublicKey = "".encode('UTF-8')
         self.serverPrivateKey = serverPrivateKey
@@ -21,7 +21,7 @@ class NetWrapper:
         self.network = network_interface('./', 'A')
         self.clientAddr = ""
         self.currentUser = ""
-        self.serverInstance = serverInstance
+        self.authenticationInstance = authenticationInstance
 
     def serverIdentify(self, msg: bytes) -> None:
         incommingJson = json.loads(msg.decode('UTF-8'))
@@ -77,7 +77,7 @@ class NetWrapper:
             retcipher = ChaCha20.new(self.cipherkey, nonce=retnonce)
             plaintext = retcipher.decrypt(retciphertext).decode('UTF-8').split(' ')
             linsuccess = (not (len(plaintext) != 3 or plaintext[0] != "LIN" or plaintext[
-                1] != self.currentUser)) and self.serverInstance.login(plaintext[1], plaintext[2])
+                1] != self.currentUser)) and self.authenticationInstance.login(plaintext[1], plaintext[2])
             if linsuccess:
                 message = "OK".encode('UTF-8')
             else:
@@ -118,7 +118,6 @@ class NetWrapper:
             return self.recieveEncryptedMessage(msg)
 
     def logout(self) -> None:
-        self.serverInstance.logout()
         self.clientAddr = ""
         self.cipherkey = "".encode('UTF-8')
         self.currentClientPublicKey = "".encode('UTF-8')

server/server.py

@@ -18,7 +18,7 @@ class Server:
         passphrase = input()
         self.auth = Authetication()
         self.networkInstance = NetWrapper(self.auth.loadUserPublicKeys(), self.auth.loadServerPrivateKey(passphrase),
-                                          self)
+                                          self.auth)
 
     def login(self, username: str, password: str) -> bool:
         self.isAuthenticated = True
@@ -30,6 +30,7 @@ class Server:
             return True
 
     def logout(self) -> None:
+        self.networkInstance.logout()
         self.isAuthenticated = False
         self.availableServer = False
         self.homeDirectory = ""
@@ -56,7 +57,13 @@ class Server:
     def execute(self, command: str, firstParam: str = "", secondParam: str = "") -> None:
         if self.homeDirectory == "" or self.executor.currentDirectory == "" or self.executor.baseDir == "":
             raise Exception("Directories must not be empty string. Did the user log in?")
-        if command == "MKD":
+        if command == "LOUT":
+            if secondParam != "" or firstParam != "":
+                self.networkInstance.sendMessage("ERROR".encode('UTF-8'))
+            else:
+                self.logout()
+                self.networkInstance.sendMessage("OK".encode('UTF-8'))
+        elif command == "MKD":
             if secondParam != "":
                 self.networkInstance.sendMessage("ERROR".encode('UTF-8'))
             else: