wireguard_peer_manager/kiss/toml-manager/client.py

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

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 decrypt_data(self, encrypted_data, symmetric_key):
        encrypted_data = base64.b64decode(encrypted_data)
        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')

    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)

        if response.status_code in (200, 201):
            # Decrypt the response body using the same symmetric key
            encrypted_response_data = response.json().get('data')
            if encrypted_response_data:
                decrypted_response = self.decrypt_data(encrypted_response_data, symmetric_key)
                return json.loads(decrypted_response)
            else:
                print("Error: Encrypted response data not found.")
                return None
        else:
            print(f"Error: {response.status_code} - {response.text}")
            return None
        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

    response = client.make_request("POST" if not public_key else "PUT", "/peers", data)
    
    if response.status_code in (200, 201):
        print(response.json()['message'])
    else:
        print(f"Error: {response.status_code} - {response.text}")

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(response.json()['message'])
    else:
        print(f"Error: {response.status_code} - {response.text}")

def list_peers(client):
    response = requests.get(f"{BASE_URL}/peers")
    
    if response.status_code == 200:
        peers = response.json()
        print(json.dumps(peers, indent=2))
    else:
        print(f"Error: {response.status_code} - {response.text}")

def restore_config(client):
    data = {
        "action": "restore"
    }
    response = client.make_request("POST", "/restore", data)
    
    if response.status_code == 200:
        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", "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(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(client, args.public_key)
    elif args.action == "list":
        list_peers(client)
    elif args.action == "restore":
        restore_config(client)

if __name__ == "__main__":
    main()