Files
DECNET/decnet/services/ssh.py
anti 6bbb2376f7 refactor(services): make artifact root configurable via DECNET_ARTIFACTS_ROOT
The ssh and telnet services hard-coded /var/lib/decnet/artifacts as the host
quarantine mount. Read it from DECNET_ARTIFACTS_ROOT with the same default so
dev/rootless deploys can point it elsewhere.
2026-04-22 09:23:36 -04:00

63 lines
2.3 KiB
Python

import os
from pathlib import Path
from decnet.services.base import BaseService
TEMPLATES_DIR = Path(__file__).parent.parent / "templates" / "ssh"
ARTIFACTS_ROOT = os.environ.get("DECNET_ARTIFACTS_ROOT", "/var/lib/decnet/artifacts")
class SSHService(BaseService):
"""
Interactive OpenSSH server for general-purpose deckies.
Replaced Cowrie emulation with a real sshd so fingerprinting tools and
experienced attackers cannot trivially identify the honeypot. Auth events,
sudo activity, and interactive commands are all forwarded to stdout as
RFC 5424 via the rsyslog bridge baked into the image.
service_cfg keys:
password Root password (default: "admin")
hostname Override container hostname
"""
name = "ssh"
ports = [22]
default_image = "build"
def compose_fragment(
self,
decky_name: str,
log_target: str | None = None,
service_cfg: dict | None = None,
) -> dict:
cfg = service_cfg or {}
env: dict = {
"SSH_ROOT_PASSWORD": cfg.get("password", "admin"),
# NODE_NAME is the authoritative decky identifier for log
# attribution — matches the host path used for the artifacts
# bind mount below. The container hostname (optionally overridden
# via SSH_HOSTNAME) is cosmetic and may differ to keep the
# decoy looking heterogeneous.
"NODE_NAME": decky_name,
}
if "hostname" in cfg:
env["SSH_HOSTNAME"] = cfg["hostname"]
# File-catcher quarantine: bind-mount a per-decky host dir so attacker
# drops (scp/sftp/wget) are mirrored out-of-band for forensic analysis.
# The in-container path masquerades as systemd-coredump so `mount`/`df`
# from inside the container looks benign.
quarantine_host = f"{ARTIFACTS_ROOT}/{decky_name}/ssh"
return {
"build": {"context": str(TEMPLATES_DIR)},
"container_name": f"{decky_name}-ssh",
"restart": "unless-stopped",
"cap_add": ["NET_BIND_SERVICE"],
"environment": env,
"volumes": [f"{quarantine_host}:/var/lib/systemd/coredump:rw"],
}
def dockerfile_context(self) -> Path:
return TEMPLATES_DIR