Overhaul of Reverse Tunnel Code

This commit is contained in:
2025-12-06 20:07:08 -07:00
parent 737bf1faef
commit 178257c588
42 changed files with 1240 additions and 357 deletions

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"""Namespace package for reverse tunnel domains (Agent side)."""
__all__ = ["remote_interactive_shell", "remote_management", "remote_video"]

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"""Placeholder Bash channel (Agent side)."""
from __future__ import annotations
import asyncio
from typing import Any, Dict, Optional
MSG_DATA = 0x05
MSG_CONTROL = 0x09
MSG_CLOSE = 0x08
CLOSE_PROTOCOL_ERROR = 3
CLOSE_AGENT_SHUTDOWN = 6
class BashChannel:
"""Stub Bash handler that immediately reports unsupported."""
def __init__(self, role, tunnel, channel_id: int, metadata: Optional[Dict[str, Any]]):
self.role = role
self.tunnel = tunnel
self.channel_id = channel_id
self.metadata = metadata or {}
self.loop = getattr(role, "loop", None) or asyncio.get_event_loop()
self._closed = False
async def start(self) -> None:
# Until Bash support is implemented, close the channel to free resources.
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="bash_unsupported")
async def on_frame(self, frame) -> None:
if self._closed:
return
if frame.msg_type in (MSG_DATA, MSG_CONTROL):
# Ignore payloads but acknowledge by stopping the channel to avoid leaks.
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="bash_unsupported")
elif frame.msg_type == MSG_CLOSE:
await self.stop(code=CLOSE_AGENT_SHUTDOWN, reason="operator_close")
async def stop(self, code: int = CLOSE_PROTOCOL_ERROR, reason: str = "") -> None:
if self._closed:
return
self._closed = True
try:
await self.role._send_frame(self.tunnel, self.role.close_frame(self.channel_id, code, reason or "bash_closed"))
except Exception:
pass
self.role._log(f"reverse_tunnel bash channel stopped channel={self.channel_id} reason={reason or 'closed'}")
__all__ = ["BashChannel"]

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"""Expose the PowerShell channel under the domain path, with file-based import fallback."""
from __future__ import annotations
import importlib.util
from pathlib import Path
powershell_module = None
# Attempt package-relative import first
try: # pragma: no cover - best effort
from ....ReverseTunnel import tunnel_Powershell as powershell_module # type: ignore
except Exception:
powershell_module = None
# Fallback: load directly from file path to survive non-package runtimes
if powershell_module is None:
try:
base = Path(__file__).resolve().parents[3] / "ReverseTunnel" / "tunnel_Powershell.py"
spec = importlib.util.spec_from_file_location("tunnel_Powershell", base)
if spec and spec.loader:
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module) # type: ignore
powershell_module = module
except Exception:
powershell_module = None
if powershell_module and hasattr(powershell_module, "PowershellChannel"):
PowershellChannel = powershell_module.PowershellChannel # type: ignore
else: # pragma: no cover - safety guard
class PowershellChannel: # type: ignore
def __init__(self, *args, **kwargs):
raise ImportError("PowerShell channel unavailable")
__all__ = ["PowershellChannel"]

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"""Protocol handlers for interactive shell tunnels (Agent side)."""
from .Powershell import PowershellChannel
from .Bash import BashChannel
__all__ = ["PowershellChannel", "BashChannel"]

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"""Interactive shell domain (PowerShell/Bash) handlers."""
__all__ = ["tunnel", "Protocols"]

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"""Placeholder module for remote interactive shell tunnel domain (Agent side)."""
DOMAIN_NAME = "remote-interactive-shell"
__all__ = ["DOMAIN_NAME"]

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"""Placeholder SSH channel (Agent side)."""
from __future__ import annotations
import asyncio
from typing import Any, Dict, Optional
MSG_DATA = 0x05
MSG_CONTROL = 0x09
MSG_CLOSE = 0x08
CLOSE_PROTOCOL_ERROR = 3
CLOSE_AGENT_SHUTDOWN = 6
class SSHChannel:
"""Stub SSH handler that marks the channel unsupported for now."""
def __init__(self, role, tunnel, channel_id: int, metadata: Optional[Dict[str, Any]]):
self.role = role
self.tunnel = tunnel
self.channel_id = channel_id
self.metadata = metadata or {}
self.loop = getattr(role, "loop", None) or asyncio.get_event_loop()
self._closed = False
async def start(self) -> None:
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="ssh_unsupported")
async def on_frame(self, frame) -> None:
if self._closed:
return
if frame.msg_type in (MSG_DATA, MSG_CONTROL):
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="ssh_unsupported")
elif frame.msg_type == MSG_CLOSE:
await self.stop(code=CLOSE_AGENT_SHUTDOWN, reason="operator_close")
async def stop(self, code: int = CLOSE_PROTOCOL_ERROR, reason: str = "") -> None:
if self._closed:
return
self._closed = True
try:
await self.role._send_frame(self.tunnel, self.role.close_frame(self.channel_id, code, reason or "ssh_closed"))
except Exception:
pass
self.role._log(f"reverse_tunnel ssh channel stopped channel={self.channel_id} reason={reason or 'closed'}")
__all__ = ["SSHChannel"]

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"""Placeholder WinRM channel (Agent side)."""
from __future__ import annotations
import asyncio
from typing import Any, Dict, Optional
MSG_DATA = 0x05
MSG_CONTROL = 0x09
MSG_CLOSE = 0x08
CLOSE_PROTOCOL_ERROR = 3
CLOSE_AGENT_SHUTDOWN = 6
class WinRMChannel:
"""Stub WinRM handler that marks the channel unsupported for now."""
def __init__(self, role, tunnel, channel_id: int, metadata: Optional[Dict[str, Any]]):
self.role = role
self.tunnel = tunnel
self.channel_id = channel_id
self.metadata = metadata or {}
self.loop = getattr(role, "loop", None) or asyncio.get_event_loop()
self._closed = False
async def start(self) -> None:
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="winrm_unsupported")
async def on_frame(self, frame) -> None:
if self._closed:
return
if frame.msg_type in (MSG_DATA, MSG_CONTROL):
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="winrm_unsupported")
elif frame.msg_type == MSG_CLOSE:
await self.stop(code=CLOSE_AGENT_SHUTDOWN, reason="operator_close")
async def stop(self, code: int = CLOSE_PROTOCOL_ERROR, reason: str = "") -> None:
if self._closed:
return
self._closed = True
try:
await self.role._send_frame(self.tunnel, self.role.close_frame(self.channel_id, code, reason or "winrm_closed"))
except Exception:
pass
self.role._log(f"reverse_tunnel winrm channel stopped channel={self.channel_id} reason={reason or 'closed'}")
__all__ = ["WinRMChannel"]

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"""Protocol handlers for remote management tunnels (Agent side)."""
from .SSH import SSHChannel
from .WinRM import WinRMChannel
__all__ = ["SSHChannel", "WinRMChannel"]

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"""Remote management domain (SSH/WinRM) handlers."""
__all__ = ["tunnel", "Protocols"]

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"""Placeholder module for remote management domain (Agent side)."""
DOMAIN_NAME = "remote-management"
__all__ = ["DOMAIN_NAME"]

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"""Placeholder RDP channel (Agent side)."""
from __future__ import annotations
import asyncio
from typing import Any, Dict, Optional
MSG_DATA = 0x05
MSG_CONTROL = 0x09
MSG_CLOSE = 0x08
CLOSE_PROTOCOL_ERROR = 3
CLOSE_AGENT_SHUTDOWN = 6
class RDPChannel:
"""Stub RDP handler that marks the channel unsupported for now."""
def __init__(self, role, tunnel, channel_id: int, metadata: Optional[Dict[str, Any]]):
self.role = role
self.tunnel = tunnel
self.channel_id = channel_id
self.metadata = metadata or {}
self.loop = getattr(role, "loop", None) or asyncio.get_event_loop()
self._closed = False
async def start(self) -> None:
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="rdp_unsupported")
async def on_frame(self, frame) -> None:
if self._closed:
return
if frame.msg_type in (MSG_DATA, MSG_CONTROL):
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="rdp_unsupported")
elif frame.msg_type == MSG_CLOSE:
await self.stop(code=CLOSE_AGENT_SHUTDOWN, reason="operator_close")
async def stop(self, code: int = CLOSE_PROTOCOL_ERROR, reason: str = "") -> None:
if self._closed:
return
self._closed = True
try:
await self.role._send_frame(self.tunnel, self.role.close_frame(self.channel_id, code, reason or "rdp_closed"))
except Exception:
pass
self.role._log(f"reverse_tunnel rdp channel stopped channel={self.channel_id} reason={reason or 'closed'}")
__all__ = ["RDPChannel"]

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"""Placeholder VNC channel (Agent side)."""
from __future__ import annotations
import asyncio
from typing import Any, Dict, Optional
MSG_DATA = 0x05
MSG_CONTROL = 0x09
MSG_CLOSE = 0x08
CLOSE_PROTOCOL_ERROR = 3
CLOSE_AGENT_SHUTDOWN = 6
class VNCChannel:
"""Stub VNC handler that marks the channel unsupported for now."""
def __init__(self, role, tunnel, channel_id: int, metadata: Optional[Dict[str, Any]]):
self.role = role
self.tunnel = tunnel
self.channel_id = channel_id
self.metadata = metadata or {}
self.loop = getattr(role, "loop", None) or asyncio.get_event_loop()
self._closed = False
async def start(self) -> None:
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="vnc_unsupported")
async def on_frame(self, frame) -> None:
if self._closed:
return
if frame.msg_type in (MSG_DATA, MSG_CONTROL):
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="vnc_unsupported")
elif frame.msg_type == MSG_CLOSE:
await self.stop(code=CLOSE_AGENT_SHUTDOWN, reason="operator_close")
async def stop(self, code: int = CLOSE_PROTOCOL_ERROR, reason: str = "") -> None:
if self._closed:
return
self._closed = True
try:
await self.role._send_frame(self.tunnel, self.role.close_frame(self.channel_id, code, reason or "vnc_closed"))
except Exception:
pass
self.role._log(f"reverse_tunnel vnc channel stopped channel={self.channel_id} reason={reason or 'closed'}")
__all__ = ["VNCChannel"]

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"""Placeholder WebRTC channel (Agent side)."""
from __future__ import annotations
import asyncio
from typing import Any, Dict, Optional
MSG_DATA = 0x05
MSG_CONTROL = 0x09
MSG_CLOSE = 0x08
CLOSE_PROTOCOL_ERROR = 3
CLOSE_AGENT_SHUTDOWN = 6
class WebRTCChannel:
"""Stub WebRTC handler that marks the channel unsupported for now."""
def __init__(self, role, tunnel, channel_id: int, metadata: Optional[Dict[str, Any]]):
self.role = role
self.tunnel = tunnel
self.channel_id = channel_id
self.metadata = metadata or {}
self.loop = getattr(role, "loop", None) or asyncio.get_event_loop()
self._closed = False
async def start(self) -> None:
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="webrtc_unsupported")
async def on_frame(self, frame) -> None:
if self._closed:
return
if frame.msg_type in (MSG_DATA, MSG_CONTROL):
await self.stop(code=CLOSE_PROTOCOL_ERROR, reason="webrtc_unsupported")
elif frame.msg_type == MSG_CLOSE:
await self.stop(code=CLOSE_AGENT_SHUTDOWN, reason="operator_close")
async def stop(self, code: int = CLOSE_PROTOCOL_ERROR, reason: str = "") -> None:
if self._closed:
return
self._closed = True
try:
await self.role._send_frame(self.tunnel, self.role.close_frame(self.channel_id, code, reason or "webrtc_closed"))
except Exception:
pass
self.role._log(f"reverse_tunnel webrtc channel stopped channel={self.channel_id} reason={reason or 'closed'}")
__all__ = ["WebRTCChannel"]

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"""Protocol handlers for remote video tunnels (Agent side)."""
from .WebRTC import WebRTCChannel
from .RDP import RDPChannel
from .VNC import VNCChannel
__all__ = ["WebRTCChannel", "RDPChannel", "VNCChannel"]

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"""Remote video/desktop domain (RDP/VNC/WebRTC) handlers."""
__all__ = ["tunnel", "Protocols"]

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"""Placeholder module for remote video domain (Agent side)."""
DOMAIN_NAME = "remote-video"
__all__ = ["DOMAIN_NAME"]