Added auth and encryption to the api. Still some bugs, endpoints seem to give http/500 error codes.

Pipfile

@@ -0,0 +1,13 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+requests = "*"
+cryptography = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.12"

config.toml

@@ -9,3 +9,10 @@ config_file = "../wireguard_example_server_config.conf"
 log_file = "../wpm.log"  # Optional: Log file location
 debug = true  # Enable debug logging
 
+[client_keys]
+public_key = """
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE0t+2/KJ7+YOHu4DmR20YtisenovD
+tvJKywNdAWX5uqnA7UsYWPVKN827afMkgZuGKgZ5wtVM4DvQCq8MyRDHgw==
+-----END PUBLIC KEY-----
+""" # example public key

wpm.py

@@ -10,6 +10,15 @@ import shutil
 from datetime import datetime
 from typing import Dict, List, Tuple
 from pathlib import Path
+import os
+import base64
+from cryptography.hazmat.primitives.asymmetric import ec
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.kdf.hkdf import HKDF
+from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
+from cryptography.exceptions import InvalidSignature
 
 # Default configuration
 DEFAULT_CONFIG = {
@@ -39,7 +48,15 @@ def load_config(config_file: str) -> dict:
         logging.error(f"Error parsing config file: {e}")
         exit(1)
 
+def load_client_public_key(config):
+    client_public_key_pem = config.get('client_keys', {}).get('public_key')
+    if not client_public_key_pem:
+        logging.error("Client public key not found in config.toml")
+        return None
+    return serialization.load_pem_public_key(client_public_key_pem.encode(), backend=default_backend())
+
 CONFIG = load_config("config.toml")
+CLIENT_PUBLIC_KEY = load_client_public_key(CONFIG)
 
 # Set up logging
 logging.basicConfig(
@@ -131,37 +148,90 @@ def reload_wireguard_service():
         logging.error(error_message)
         return False, error_message
 
-class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
+
+# Add these new functions for encryption and decryption
+def generate_ecc_key_pair():
+    private_key = ec.generate_private_key(ec.SECP256R1(), default_backend())
+    public_key = private_key.public_key()
+    return private_key, public_key
+
+def decrypt_symmetric_key(encrypted_symmetric_key, private_key):
+    return private_key.decrypt(
+        encrypted_symmetric_key,
+        ec.ECIES(hashes.SHA256())
+    )
+
+def decrypt_data(encrypted_data, symmetric_key):
+    iv = encrypted_data[:16]
+    cipher = Cipher(algorithms.AES(symmetric_key), modes.CFB(iv), backend=default_backend())
+    decryptor = cipher.decryptor()
+    decrypted_data = decryptor.update(encrypted_data[16:]) + decryptor.finalize()
+    return decrypted_data.decode('utf-8')
+
+# Generate server keys on startup
+SERVER_PRIVATE_KEY, SERVER_PUBLIC_KEY = generate_ecc_key_pair()
+
+class SecureWireGuardHandler(http.server.SimpleHTTPRequestHandler):
     def _send_response(self, status_code: int, data: dict) -> None:
         self.send_response(status_code)
         self.send_header('Content-type', 'application/json')
         self.end_headers()
         self.wfile.write(json.dumps(data).encode())
 
-    def do_GET(self) -> None:
-        if self.path == '/peers':
-            config = read_config()
-            peers = parse_peers(config)
-            self._send_response(200, peers)
-        else:
-            self._send_response(404, {"error": "Not found"})
-
-    def do_POST(self) -> None:
-        if self.path == '/peers':
-            create_backup()  # Create a backup before making changes
+    def _decrypt_and_verify_request(self):
         content_length = int(self.headers['Content-Length'])
-            post_data = self.rfile.read(content_length)
-            new_peer = json.loads(post_data.decode('utf-8'))
+        encrypted_data = self.rfile.read(content_length)
         
+        # Extract the JWE token from the Authorization header
+        auth_header = self.headers.get('Authorization', '')
+        if not auth_header.startswith('Bearer '):
+            raise ValueError("Invalid Authorization header")
+        
+        jwe_token = auth_header.split(' ')[1]
+        payload = json.loads(base64.b64decode(jwe_token.split('.')[1]))
+        
+        encrypted_symmetric_key = base64.b64decode(payload['enc_sym_key'])
+        
+        # Decrypt the symmetric key
+        symmetric_key = decrypt_symmetric_key(encrypted_symmetric_key, SERVER_PRIVATE_KEY)
+        
+        # Decrypt the data
+        decrypted_data = decrypt_data(encrypted_data, symmetric_key)
+        
+        # Verify the client's signature
+        signature = base64.b64decode(payload['signature'])
+        try:
+            CLIENT_PUBLIC_KEY.verify(
+                signature,
+                decrypted_data.encode(),
+                ec.ECDSA(hashes.SHA256())
+            )
+        except InvalidSignature:
+            raise ValueError("Invalid client signature")
+        
+        return json.loads(decrypted_data)
+
+    # Update all request handling methods (do_POST, do_PUT, do_DELETE, do_GET) to use _decrypt_and_verify_request
+    # For example:
+
+    def do_POST(self):
+        try:
+            decrypted_data = self._decrypt_and_verify_request()
+            action = decrypted_data.get('action')
+            
+            if action == 'add_peer':
+                create_backup()
+                new_peer = decrypted_data.get('peer')
                 config = read_config()
                 config += "\n\n" + peer_to_string(new_peer)
                 write_config(config)
                 
-            if reload_wireguard_service():
+                success, message = reload_wireguard_service()
+                if success:
                     self._send_response(201, {"message": "Peer added successfully and service reloaded"})
                 else:
                     self._send_response(500, {"error": "Peer added but failed to reload service"})
-        elif self.path == '/restore':
+            elif action == 'restore':
                 if restore_from_backup():
                     if reload_wireguard_service():
                         self._send_response(200, {"message": "Configuration restored from backup and service reloaded"})
@@ -170,16 +240,23 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                 else:
                     self._send_response(500, {"error": "Failed to restore from backup"})
             else:
-            self._send_response(404, {"error": "Not found"})
+                self._send_response(400, {"error": "Invalid action"})
+        except ValueError as e:
+            logging.error(f"Error processing request: {str(e)}")
+            self._send_response(400, {"error": "Invalid request"})
+        except Exception as e:
+            logging.error(f"Unexpected error: {str(e)}")
+            self._send_response(500, {"error": "Internal server error"})
 
-    def do_PUT(self) -> None:
-        path_parts = self.path.split('/')
-        if len(path_parts) == 3 and path_parts[1] == 'peers':
-            create_backup()  # Create a backup before making changes
-            public_key = urllib.parse.unquote(path_parts[2])
-            content_length = int(self.headers['Content-Length'])
-            put_data = self.rfile.read(content_length)
-            updated_peer = json.loads(put_data.decode('utf-8'))
+    def do_PUT(self):
+        try:
+            decrypted_data = self._decrypt_and_verify_request()
+            action = decrypted_data.get('action')
+            
+            if action == 'update_peer':
+                create_backup()
+                public_key = decrypted_data.get('public_key')
+                updated_peer = decrypted_data.get('peer')
                 
                 config = read_config()
                 peers = parse_peers(config)
@@ -188,7 +265,6 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                 for i, peer in enumerate(peers):
                     if peer.get('PublicKey') == public_key:
                         peer_found = True
-                    # Update the peer
                         peers[i] = updated_peer
                         new_config = re.sub(r'(\[Interface\].*?\n\n)(.*)', 
                                             r'\1' + '\n\n'.join(peer_to_string(p) for p in peers), 
@@ -196,7 +272,6 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                                             flags=re.DOTALL)
                         write_config(new_config)
 
-                    # Reload WireGuard service and send the appropriate response
                         success, message = reload_wireguard_service()
                         if success:
                             self._send_response(200, {"message": "Peer updated successfully and service reloaded"})
@@ -205,16 +280,25 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                         break
             
                 if not peer_found:
-                # If no peer with the given public key was found, return a 404 response
                     self._send_response(404, {"error": "Peer not found"})
             else:
-            self._send_response(404, {"error": "Not found"})
+                self._send_response(400, {"error": "Invalid action"})
+        except ValueError as e:
+            logging.error(f"Error processing request: {str(e)}")
+            self._send_response(400, {"error": "Invalid request"})
+        except Exception as e:
+            logging.error(f"Unexpected error: {str(e)}")
+            self._send_response(500, {"error": "Internal server error"})
 
-    def do_DELETE(self) -> None:
-        path_parts = self.path.split('/')
-        if len(path_parts) == 3 and path_parts[1] == 'peers':
-            create_backup()  # Create a backup before making changes
-            public_key = urllib.parse.unquote(path_parts[2])
+
+    def do_DELETE(self):
+        try:
+            decrypted_data = self._decrypt_and_verify_request()
+            action = decrypted_data.get('action')
+
+            if action == 'delete_peer':
+                create_backup()
+                public_key = decrypted_data.get('public_key')
 
                 config = read_config()
                 peers = parse_peers(config)
@@ -223,7 +307,6 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                 for peer in peers:
                     if peer.get('PublicKey') == public_key:
                         peer_found = True
-                    # Remove the peer
                         peers.remove(peer)
                         new_config = re.sub(r'(\[Interface\].*?\n\n)(.*)', 
                                             r'\1' + '\n\n'.join(peer_to_string(p) for p in peers), 
@@ -231,7 +314,6 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                                             flags=re.DOTALL)
                         write_config(new_config)
 
-                    # Reload WireGuard service and send the appropriate response
                         success, message = reload_wireguard_service()
                         if success:
                             self._send_response(200, {"message": "Peer deleted successfully and service reloaded"})
@@ -240,15 +322,49 @@ class WireGuardHandler(http.server.SimpleHTTPRequestHandler):
                         break
             
                 if not peer_found:
-                # If no peer with the given public key was found, return a 404 response
                     self._send_response(404, {"error": "Peer not found"})
             else:
-            self._send_response(404, {"error": "Not found"})
+                self._send_response(400, {"error": "Invalid action"})
+        except ValueError as e:
+            logging.error(f"Error processing request: {str(e)}")
+            self._send_response(400, {"error": "Invalid request"})
+        except Exception as e:
+            logging.error(f"Unexpected error: {str(e)}")
+            self._send_response(500, {"error": "Internal server error"})
+
+    def do_GET(self):
+        if self.path == '/public_key':
+            try:
+                public_key_pem = SERVER_PUBLIC_KEY.public_bytes(
+                    encoding=serialization.Encoding.PEM,
+                    format=serialization.PublicFormat.SubjectPublicKeyInfo
+                )
+                self._send_response(200, {"public_key": public_key_pem.decode()})
+            except Exception as e:
+                logging.error(f"Error sending public key: {str(e)}")
+                self._send_response(500, {"error": "Internal server error"})
+        else:
+            try:
+                decrypted_data = self._decrypt_and_verify_request()
+                action = decrypted_data.get('action')
+
+                if action == 'get_peers':
+                    config = read_config()
+                    peers = parse_peers(config)
+                    self._send_response(200, peers)
+                else:
+                    self._send_response(400, {"error": "Invalid action"})
+            except ValueError as e:
+                logging.error(f"Error processing request: {str(e)}")
+                self._send_response(400, {"error": "Invalid request"})
+            except Exception as e:
+                logging.error(f"Unexpected error: {str(e)}")
+                self._send_response(500, {"error": "Internal server error"})
 
 def run_server() -> None:
     host = CONFIG["server"]["host"]
     port = CONFIG["server"]["port"]
-    with socketserver.TCPServer((host, port), WireGuardHandler) as httpd:
+    with socketserver.TCPServer((host, port), SecureWireGuardHandler) as httpd:
         logging.info(f"Serving on {host}:{port}")
         httpd.serve_forever()
 

wpm_client.py

@@ -2,44 +2,117 @@ import argparse
 import requests
 import json
 import sys
+import os
+import base64
+from cryptography.hazmat.primitives.asymmetric import ec
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
 
 BASE_URL = "http://localhost:8080"  # Update this if your server is running on a different host or port
 
-def create_or_update_peer(public_key, allowed_ips):
-    url = f"{BASE_URL}/peers"
+class SecureApiClient:
+    def __init__(self, server_public_key, client_private_key):
+        self.server_public_key = server_public_key
+        self.client_private_key = client_private_key
+
+    def generate_symmetric_key(self):
+        return os.urandom(32)  # AES 256-bit key
+
+    def encrypt_symmetric_key(self, symmetric_key):
+        encrypted_symmetric_key = self.server_public_key.encrypt(
+            symmetric_key,
+            ec.ECIES(hashes.SHA256())
+        )
+        return encrypted_symmetric_key
+
+    def encrypt_data(self, data, symmetric_key):
+        iv = os.urandom(16)
+        cipher = Cipher(algorithms.AES(symmetric_key), modes.CFB(iv), backend=default_backend())
+        encryptor = cipher.encryptor()
+        encrypted_data = encryptor.update(json.dumps(data).encode('utf-8')) + encryptor.finalize()
+        return iv + encrypted_data
+
+    def sign_data(self, data):
+        signature = self.client_private_key.sign(
+            data,
+            ec.ECDSA(hashes.SHA256())
+        )
+        return base64.b64encode(signature).decode('utf-8')
+
+    def create_jwe(self, encrypted_symmetric_key, encrypted_data, signature):
+        token = base64.b64encode(json.dumps({
+            'enc_sym_key': base64.b64encode(encrypted_symmetric_key).decode('utf-8'),
+            'data': base64.b64encode(encrypted_data).decode('utf-8'),
+            'signature': signature
+        }).encode()).decode()
+        return f"eyJhbGciOiJub25lIn0.{token}."  # Add header and empty signature
+
+    def make_request(self, method, endpoint, data):
+        symmetric_key = self.generate_symmetric_key()
+        encrypted_symmetric_key = self.encrypt_symmetric_key(symmetric_key)
+        encrypted_data = self.encrypt_data(data, symmetric_key)
+        signature = self.sign_data(encrypted_data)
+        jwe_token = self.create_jwe(encrypted_symmetric_key, encrypted_data, signature)
+
+        headers = {
+            'Authorization': f'Bearer {jwe_token}',
+            'Content-Type': 'application/octet-stream'
+        }
+
+        response = requests.request(method, f"{BASE_URL}{endpoint}", headers=headers, data=encrypted_data)
+        return response
+
+def get_server_public_key():
+    response = requests.get(f"{BASE_URL}/public_key")
+    if response.status_code == 200:
+        public_key_pem = response.json()['public_key']
+        return serialization.load_pem_public_key(public_key_pem.encode(), backend=default_backend())
+    else:
+        print(f"Error getting server public key: {response.status_code} - {response.text}")
+        sys.exit(1)
+
+def load_client_private_key(key_path):
+    with open(key_path, "rb") as key_file:
+        return serialization.load_pem_private_key(
+            key_file.read(),
+            password=None,
+            backend=default_backend()
+        )
+
+def create_or_update_peer(client, public_key, allowed_ips):
     data = {
+        "action": "add_peer" if not public_key else "update_peer",
+        "peer": {
             "PublicKey": public_key,
             "AllowedIPs": allowed_ips
         }
+    }
+    if public_key:
+        data["public_key"] = public_key
 
-    # First, try to update an existing peer
-    response = requests.put(f"{url}/{public_key}", json=data)
-    
-    if response.status_code == 404:
-        # If the peer doesn't exist, create a new one
-        response = requests.post(url, json=data)
+    response = client.make_request("POST" if not public_key else "PUT", "/peers", data)
     
     if response.status_code in (200, 201):
-        result = response.json()
-        if "warning" in result:
-            print(f"Warning: {result['warning']}")
-        else:
-            print(result['message'])
+        print(response.json()['message'])
     else:
         print(f"Error: {response.status_code} - {response.text}")
 
-def delete_peer(public_key):
-    url = f"{BASE_URL}/peers/{public_key}"
-    response = requests.delete(url)
+def delete_peer(client, public_key):
+    data = {
+        "action": "delete_peer",
+        "public_key": public_key
+    }
+    response = client.make_request("DELETE", "/peers", data)
     
     if response.status_code == 200:
-        print("Peer deleted successfully.")
+        print(response.json()['message'])
     else:
         print(f"Error: {response.status_code} - {response.text}")
 
-def list_peers():
-    url = f"{BASE_URL}/peers"
-    response = requests.get(url)
+def list_peers(client):
+    response = requests.get(f"{BASE_URL}/peers")
     
     if response.status_code == 200:
         peers = response.json()
@@ -47,38 +120,77 @@ def list_peers():
     else:
         print(f"Error: {response.status_code} - {response.text}")
 
-def restore_config():
-    url = f"{BASE_URL}/restore"
-    response = requests.post(url)
+def restore_config(client):
+    data = {
+        "action": "restore"
+    }
+    response = client.make_request("POST", "/restore", data)
     
     if response.status_code == 200:
-        print("Configuration restored successfully.")
+        print(response.json()['message'])
     else:
         print(f"Error: {response.status_code} - {response.text}")
 
+def generate_client_keys():
+    private_key = ec.generate_private_key(ec.SECP256R1(), default_backend())
+    public_key = private_key.public_key()
+
+    private_pem = private_key.private_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PrivateFormat.PKCS8,
+        encryption_algorithm=serialization.NoEncryption()
+    )
+
+    public_pem = public_key.public_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PublicFormat.SubjectPublicKeyInfo
+    )
+
+    with open("client_private_key.pem", "wb") as f:
+        f.write(private_pem)
+
+    with open("client_public_key.pem", "wb") as f:
+        f.write(public_pem)
+
+    print("Client keys generated successfully.")
+    print("Private key saved to: client_private_key.pem")
+    print("Public key saved to: client_public_key.pem")
+    print("\nIMPORTANT: Add the following to the server's config.toml file:")
+    print("\n[client_keys]")
+    print(f'public_key = """\n{public_pem.decode()}"""')
+    print("\nAfter adding the key, restart the server for the changes to take effect.")
+
 def main():
     parser = argparse.ArgumentParser(description="WireGuard Config Manager Client")
-    parser.add_argument("action", choices=["create", "update", "delete", "list", "restore"], help="Action to perform")
+    parser.add_argument("action", choices=["create", "update", "delete", "list", "restore", "generate_keys"], help="Action to perform")
     parser.add_argument("--public-key", help="Public key of the peer")
     parser.add_argument("--allowed-ips", help="Allowed IPs for the peer")
+    parser.add_argument("--private-key", default="client_private_key.pem", help="Path to client's private key file")
     
     args = parser.parse_args()
 
+    if args.action == "generate_keys":
+        generate_client_keys()
+        return
+
+    server_public_key = get_server_public_key()
+    client_private_key = load_client_private_key(args.private_key)
+    client = SecureApiClient(server_public_key, client_private_key)
+    
     if args.action in ["create", "update"]:
         if not args.public_key or not args.allowed_ips:
             print("Error: Both --public-key and --allowed-ips are required for create/update actions.")
             sys.exit(1)
-        create_or_update_peer(args.public_key, args.allowed_ips)
+        create_or_update_peer(client, args.public_key, args.allowed_ips)
     elif args.action == "delete":
         if not args.public_key:
             print("Error: --public-key is required for delete action.")
             sys.exit(1)
-        delete_peer(args.public_key)
+        delete_peer(client, args.public_key)
     elif args.action == "list":
-        list_peers()
+        list_peers(client)
     elif args.action == "restore":
-        restore_config()
+        restore_config(client)
 
 if __name__ == "__main__":
     main()
-