mirror of
https://github.com/bunny-lab-io/Borealis.git
synced 2026-02-04 12:20:31 -07:00
414 lines
16 KiB
Python
414 lines
16 KiB
Python
# ======================================================
|
|
# Data\Agent\Roles\role_WireGuardTunnel.py
|
|
# Description: WireGuard client lifecycle for outbound reverse VPN (Windows) with host-only /32 routing.
|
|
#
|
|
# API Endpoints (if applicable): None
|
|
# ======================================================
|
|
|
|
"""WireGuard client role (Windows) for reverse VPN tunnels.
|
|
|
|
This role prepares the WireGuard client config, manages a single active
|
|
session, enforces idle teardown, and logs lifecycle events to
|
|
Agent/Logs/VPN_Tunnel/tunnel.log. It binds to Engine Socket.IO events
|
|
(`vpn_tunnel_start`, `vpn_tunnel_stop`, `vpn_tunnel_activity`) to start/stop
|
|
the client session with the issued config/token.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import base64
|
|
import json
|
|
import os
|
|
import subprocess
|
|
import threading
|
|
import time
|
|
from pathlib import Path
|
|
from typing import Any, Dict, Optional
|
|
|
|
from cryptography.hazmat.primitives import serialization
|
|
from cryptography.hazmat.primitives.asymmetric import x25519
|
|
|
|
try:
|
|
from signature_utils import verify_and_store_script_signature
|
|
except Exception: # pragma: no cover - fallback for runtime path issues
|
|
import sys
|
|
from pathlib import Path as _Path
|
|
|
|
base_dir = _Path(__file__).resolve().parents[1]
|
|
if str(base_dir) not in sys.path:
|
|
sys.path.insert(0, str(base_dir))
|
|
from signature_utils import verify_and_store_script_signature
|
|
|
|
ROLE_NAME = "WireGuardTunnel"
|
|
ROLE_CONTEXTS = ["system"]
|
|
|
|
|
|
def _log_path() -> Path:
|
|
root = Path(__file__).resolve().parents[2] / "Logs" / "VPN_Tunnel"
|
|
root.mkdir(parents=True, exist_ok=True)
|
|
return root / "tunnel.log"
|
|
|
|
|
|
def _write_log(message: str) -> None:
|
|
ts = time.strftime("%Y-%m-%dT%H:%M:%S", time.localtime())
|
|
try:
|
|
_log_path().open("a", encoding="utf-8").write(f"[{ts}] [wg-client] {message}\n")
|
|
except Exception:
|
|
pass
|
|
|
|
|
|
def _encode_key(raw: bytes) -> str:
|
|
return base64.b64encode(raw).decode("ascii").strip()
|
|
|
|
|
|
def _generate_client_keys(root: Path) -> Dict[str, str]:
|
|
root.mkdir(parents=True, exist_ok=True)
|
|
priv_path = root / "client_private.key"
|
|
pub_path = root / "client_public.key"
|
|
|
|
if priv_path.is_file() and pub_path.is_file():
|
|
try:
|
|
private_key = priv_path.read_text(encoding="utf-8").strip()
|
|
public_key = pub_path.read_text(encoding="utf-8").strip()
|
|
if private_key and public_key:
|
|
return {"private": private_key, "public": public_key}
|
|
except Exception:
|
|
pass
|
|
|
|
key = x25519.X25519PrivateKey.generate()
|
|
priv = _encode_key(
|
|
key.private_bytes(
|
|
encoding=serialization.Encoding.Raw,
|
|
format=serialization.PrivateFormat.Raw,
|
|
encryption_algorithm=serialization.NoEncryption(),
|
|
)
|
|
)
|
|
pub = _encode_key(
|
|
key.public_key().public_bytes(
|
|
encoding=serialization.Encoding.Raw,
|
|
format=serialization.PublicFormat.Raw,
|
|
)
|
|
)
|
|
try:
|
|
priv_path.write_text(priv, encoding="utf-8")
|
|
pub_path.write_text(pub, encoding="utf-8")
|
|
except Exception:
|
|
_write_log("Failed to persist WireGuard client keys.")
|
|
return {"private": priv, "public": pub}
|
|
|
|
|
|
class SessionConfig:
|
|
def __init__(
|
|
self,
|
|
*,
|
|
token: Dict[str, Any],
|
|
virtual_ip: str,
|
|
allowed_ips: str,
|
|
endpoint: str,
|
|
server_public_key: str,
|
|
allowed_ports: str,
|
|
idle_seconds: int = 900,
|
|
preshared_key: Optional[str] = None,
|
|
client_private_key: Optional[str] = None,
|
|
client_public_key: Optional[str] = None,
|
|
) -> None:
|
|
self.token = token
|
|
self.virtual_ip = virtual_ip
|
|
self.allowed_ips = allowed_ips
|
|
self.endpoint = endpoint
|
|
self.server_public_key = server_public_key
|
|
self.allowed_ports = allowed_ports
|
|
self.idle_seconds = idle_seconds
|
|
self.preshared_key = preshared_key
|
|
self.client_private_key = client_private_key
|
|
self.client_public_key = client_public_key
|
|
|
|
|
|
class WireGuardClient:
|
|
def __init__(self) -> None:
|
|
base = Path(__file__).resolve().parents[2]
|
|
self.cert_root = base / "Borealis" / "Certificates" / "VPN_Client"
|
|
self.temp_root = base / "Borealis" / "Temp"
|
|
self.temp_root.mkdir(parents=True, exist_ok=True)
|
|
self.conf_path = self.temp_root / "borealis-wg-client.conf"
|
|
self.service_name = "borealis-wg-client"
|
|
self.session: Optional[SessionConfig] = None
|
|
self.idle_deadline: Optional[float] = None
|
|
self._idle_thread: Optional[threading.Thread] = None
|
|
self._stop_event = threading.Event()
|
|
self._client_keys = _generate_client_keys(self.cert_root)
|
|
self._wg_exe = self._resolve_wireguard_exe()
|
|
|
|
def _resolve_wireguard_exe(self) -> str:
|
|
candidates = [
|
|
str(Path(os.environ.get("ProgramFiles", "C:\\Program Files")) / "WireGuard" / "wireguard.exe"),
|
|
"wireguard.exe",
|
|
]
|
|
for candidate in candidates:
|
|
if Path(candidate).is_file():
|
|
return candidate
|
|
return "wireguard.exe"
|
|
|
|
def _validate_token(self, token: Dict[str, Any], *, signing_client: Optional[Any] = None) -> None:
|
|
payload = dict(token or {})
|
|
signature = payload.pop("signature", None)
|
|
signing_key = payload.pop("signing_key", None)
|
|
sig_alg = payload.pop("sig_alg", None)
|
|
|
|
required = ("agent_id", "tunnel_id", "expires_at", "port")
|
|
missing = [field for field in required if field not in token or token[field] in ("", None)]
|
|
if missing:
|
|
raise ValueError(f"Missing token fields: {', '.join(missing)}")
|
|
try:
|
|
exp = float(payload["expires_at"])
|
|
except Exception:
|
|
raise ValueError("Invalid token expiry")
|
|
if exp <= time.time():
|
|
raise ValueError("Token expired")
|
|
try:
|
|
port = int(payload["port"])
|
|
except Exception:
|
|
raise ValueError("Invalid token port")
|
|
if port < 1 or port > 65535:
|
|
raise ValueError("Invalid token port")
|
|
|
|
if not signature:
|
|
if sig_alg or signing_key:
|
|
raise ValueError("Token signature missing")
|
|
stored_key = None
|
|
if signing_client is not None and hasattr(signing_client, "load_server_signing_key"):
|
|
try:
|
|
stored_key = signing_client.load_server_signing_key()
|
|
except Exception:
|
|
stored_key = None
|
|
if isinstance(stored_key, str) and stored_key.strip():
|
|
raise ValueError("Token signature missing")
|
|
return
|
|
|
|
if signature:
|
|
if sig_alg and str(sig_alg).lower() not in ("ed25519", "eddsa"):
|
|
raise ValueError("Unsupported token signature algorithm")
|
|
payload_bytes = json.dumps(payload, sort_keys=True, separators=(",", ":")).encode("utf-8")
|
|
if not verify_and_store_script_signature(signing_client, payload_bytes, str(signature), signing_key):
|
|
raise ValueError("Token signature invalid")
|
|
|
|
def _run(self, args: list[str]) -> tuple[int, str, str]:
|
|
try:
|
|
proc = subprocess.run(args, capture_output=True, text=True, check=False)
|
|
return proc.returncode, proc.stdout.strip(), proc.stderr.strip()
|
|
except Exception as exc: # pragma: no cover - runtime guard
|
|
return 1, "", str(exc)
|
|
|
|
def _render_config(self, session: SessionConfig) -> str:
|
|
private_key = session.client_private_key or self._client_keys["private"]
|
|
lines = [
|
|
"[Interface]",
|
|
f"PrivateKey = {private_key}",
|
|
f"Address = {session.virtual_ip}",
|
|
"",
|
|
"[Peer]",
|
|
f"PublicKey = {session.server_public_key}",
|
|
f"AllowedIPs = {session.allowed_ips}",
|
|
f"Endpoint = {session.endpoint}",
|
|
"PersistentKeepalive = 20",
|
|
]
|
|
if session.preshared_key:
|
|
lines.append(f"PresharedKey = {session.preshared_key}")
|
|
return "\n".join(lines)
|
|
|
|
def _start_idle_monitor(self) -> None:
|
|
self._stop_event.clear()
|
|
|
|
def _loop() -> None:
|
|
while not self._stop_event.is_set():
|
|
if self.idle_deadline and time.time() >= self.idle_deadline:
|
|
_write_log("Idle timeout reached; stopping WireGuard session.")
|
|
self.stop_session(reason="idle_timeout")
|
|
return
|
|
time.sleep(5)
|
|
|
|
t = threading.Thread(target=_loop, daemon=True)
|
|
t.start()
|
|
self._idle_thread = t
|
|
|
|
def start_session(self, session: SessionConfig, *, signing_client: Optional[Any] = None) -> None:
|
|
if self.session:
|
|
_write_log("Rejecting start_session: existing session already active.")
|
|
return
|
|
|
|
try:
|
|
self._validate_token(session.token, signing_client=signing_client)
|
|
except Exception as exc:
|
|
_write_log(f"Refusing to start WireGuard session: {exc}")
|
|
return
|
|
|
|
rendered = self._render_config(session)
|
|
self.conf_path.write_text(rendered, encoding="utf-8")
|
|
_write_log(f"Rendered WireGuard client config to {self.conf_path}")
|
|
|
|
# Pre-stop any orphaned tunnel service using the same name
|
|
self.stop_session(reason="preflight", ignore_missing=True)
|
|
|
|
code, out, err = self._run([self._wg_exe, "/installtunnelservice", str(self.conf_path)])
|
|
if code != 0:
|
|
_write_log(f"Failed to install WireGuard client tunnel: code={code} err={err}")
|
|
return
|
|
|
|
self.session = session
|
|
self.idle_deadline = time.time() + max(60, session.idle_seconds)
|
|
_write_log("WireGuard client session started; idle timer armed.")
|
|
self._start_idle_monitor()
|
|
|
|
def stop_session(self, reason: str = "stop", ignore_missing: bool = False) -> None:
|
|
code, out, err = self._run([self._wg_exe, "/uninstalltunnelservice", self.service_name])
|
|
if code != 0:
|
|
if not ignore_missing:
|
|
_write_log(f"Failed to uninstall WireGuard client tunnel: code={code} err={err}")
|
|
else:
|
|
_write_log(f"WireGuard client session stopped (reason={reason}).")
|
|
self.session = None
|
|
self.idle_deadline = None
|
|
self._stop_event.set()
|
|
|
|
def bump_activity(self) -> None:
|
|
if self.session and self.idle_deadline:
|
|
self.idle_deadline = time.time() + max(60, self.session.idle_seconds)
|
|
_write_log("WireGuard client activity bump; idle timer reset.")
|
|
|
|
|
|
client = WireGuardClient()
|
|
|
|
|
|
def _parse_allowed_ips(value: Any, fallback: Optional[str]) -> Optional[str]:
|
|
if isinstance(value, list):
|
|
if not value:
|
|
return fallback
|
|
return str(value[0])
|
|
if isinstance(value, str) and value.strip():
|
|
return value.strip()
|
|
return fallback
|
|
|
|
|
|
def _coerce_int(value: Any, default: int) -> int:
|
|
try:
|
|
return int(value)
|
|
except Exception:
|
|
return default
|
|
|
|
|
|
class Role:
|
|
def __init__(self, ctx) -> None:
|
|
self.ctx = ctx
|
|
self.client = client
|
|
hooks = getattr(ctx, "hooks", {}) or {}
|
|
self._log_hook = hooks.get("log_agent")
|
|
self._http_client_factory = hooks.get("http_client")
|
|
try:
|
|
self.client.stop_session(reason="agent_startup", ignore_missing=True)
|
|
except Exception:
|
|
self._log("Failed to preflight WireGuard session cleanup.", error=True)
|
|
|
|
def _log(self, message: str, *, error: bool = False) -> None:
|
|
if callable(self._log_hook):
|
|
try:
|
|
self._log_hook(message, fname="VPN_Tunnel/tunnel.log")
|
|
if error:
|
|
self._log_hook(message, fname="agent.error.log")
|
|
except Exception:
|
|
pass
|
|
_write_log(message)
|
|
|
|
def _http_client(self) -> Optional[Any]:
|
|
try:
|
|
if callable(self._http_client_factory):
|
|
return self._http_client_factory()
|
|
except Exception:
|
|
return None
|
|
return None
|
|
|
|
def _build_session(self, payload: Any) -> Optional[SessionConfig]:
|
|
if not isinstance(payload, dict):
|
|
self._log("WireGuard start payload missing/invalid.", error=True)
|
|
return None
|
|
|
|
payload_agent_id = payload.get("agent_id") or payload.get("agent_guid")
|
|
if payload_agent_id:
|
|
if str(payload_agent_id).strip() != str(self.ctx.agent_id).strip():
|
|
return None
|
|
|
|
token = payload.get("token") or payload.get("orchestration_token")
|
|
if not isinstance(token, dict):
|
|
self._log("WireGuard start missing token payload.", error=True)
|
|
return None
|
|
|
|
virtual_ip = payload.get("virtual_ip") or payload.get("client_virtual_ip")
|
|
endpoint = payload.get("endpoint") or payload.get("server_endpoint")
|
|
server_public_key = payload.get("server_public_key") or payload.get("public_key")
|
|
engine_virtual_ip = payload.get("engine_virtual_ip") or payload.get("engine_ip")
|
|
|
|
allowed_ips = _parse_allowed_ips(payload.get("allowed_ips"), engine_virtual_ip)
|
|
if not allowed_ips:
|
|
self._log("WireGuard start missing allowed_ips/engine_virtual_ip.", error=True)
|
|
return None
|
|
if "," in allowed_ips or allowed_ips.endswith("/0") or "/32" not in allowed_ips:
|
|
self._log("WireGuard allowed_ips must be a single /32.", error=True)
|
|
return None
|
|
|
|
if not virtual_ip or not endpoint or not server_public_key:
|
|
self._log("WireGuard start missing required fields.", error=True)
|
|
return None
|
|
if "/32" not in str(virtual_ip):
|
|
self._log("WireGuard virtual_ip must be /32.", error=True)
|
|
return None
|
|
|
|
idle_seconds = _coerce_int(payload.get("idle_seconds"), 900)
|
|
allowed_ports = payload.get("allowed_ports")
|
|
if isinstance(allowed_ports, list):
|
|
allowed_ports = ",".join(str(p) for p in allowed_ports)
|
|
allowed_ports = str(allowed_ports or "")
|
|
|
|
return SessionConfig(
|
|
token=token,
|
|
virtual_ip=str(virtual_ip),
|
|
allowed_ips=str(allowed_ips),
|
|
endpoint=str(endpoint),
|
|
server_public_key=str(server_public_key),
|
|
allowed_ports=allowed_ports,
|
|
idle_seconds=idle_seconds,
|
|
preshared_key=payload.get("preshared_key"),
|
|
client_private_key=payload.get("client_private_key"),
|
|
client_public_key=payload.get("client_public_key"),
|
|
)
|
|
|
|
def register_events(self) -> None:
|
|
sio = self.ctx.sio
|
|
|
|
@sio.on("vpn_tunnel_start")
|
|
async def _vpn_tunnel_start(payload):
|
|
session = self._build_session(payload)
|
|
if not session:
|
|
return
|
|
self._log("WireGuard start request received.")
|
|
self.client.start_session(session, signing_client=self._http_client())
|
|
|
|
@sio.on("vpn_tunnel_stop")
|
|
async def _vpn_tunnel_stop(payload):
|
|
reason = "server_stop"
|
|
if isinstance(payload, dict):
|
|
target_agent = payload.get("agent_id")
|
|
if target_agent and str(target_agent).strip() != str(self.ctx.agent_id).strip():
|
|
return
|
|
reason = payload.get("reason") or reason
|
|
self._log(f"WireGuard stop requested (reason={reason}).")
|
|
self.client.stop_session(reason=str(reason))
|
|
|
|
@sio.on("vpn_tunnel_activity")
|
|
async def _vpn_tunnel_activity(payload):
|
|
self.client.bump_activity()
|
|
|
|
def stop_all(self) -> None:
|
|
try:
|
|
self.client.stop_session(reason="agent_shutdown")
|
|
except Exception:
|
|
self._log("Failed to stop WireGuard client during shutdown.", error=True)
|