anti
f2b3393669
Replaces LICENSE (GPLv3 -> AGPLv3) and prepends `SPDX-License-Identifier: AGPL-3.0-or-later` to every source file across decnet/, decnet_web/, tests/, scripts/, and tools/. Rationale: closes the GPLv3 ASP loophole so any party operating a modified DECNET as a network service must offer their modified source. Personal copyright (Samuel Paschuan) + inbound=outbound contributions make a future unilateral relicense infeasible. - LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt) - COPYRIGHT: project copyright notice - tools/add_spdx_headers.py: idempotent header injector (shebang- and PEP 263-aware) Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh). No behavior change; comments only.
122 lines
3.7 KiB
Python
122 lines
3.7 KiB
Python
#!/usr/bin/env python3
|
|
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
"""
|
|
Per-instance stealth seeding for honeypot service templates.
|
|
|
|
The whole decoy fleet looks identical to a scanner unless each decky
|
|
diverges on the boring details: cluster UUIDs, auth salts, uptime, minor
|
|
version strings, etc. This module derives a stable per-instance seed
|
|
from NODE_NAME (+ optional INSTANCE_ID) and exposes helpers that return
|
|
deterministic-per-decky-but-different-across-the-fleet values.
|
|
|
|
Connection-time jitter is intentionally NOT seeded — two hits to the same
|
|
decky should not replay the same latency curve.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import asyncio
|
|
import hashlib
|
|
import os
|
|
import random
|
|
import time
|
|
import uuid
|
|
from typing import Sequence, TypeVar
|
|
|
|
T = TypeVar("T")
|
|
|
|
_HOSTNAME = (
|
|
os.environ.get("NODE_NAME")
|
|
or os.environ.get("HOSTNAME")
|
|
or "decky"
|
|
)
|
|
_INSTANCE_ID = os.environ.get("INSTANCE_ID", "")
|
|
_SEED_MATERIAL = f"{_HOSTNAME}:{_INSTANCE_ID}".encode()
|
|
_SEED_INT = int.from_bytes(hashlib.sha256(_SEED_MATERIAL).digest()[:8], "big")
|
|
|
|
#: Deterministic RNG seeded per decky — use for *persistent* choices
|
|
#: (versions, UUIDs, stored credentials). Never use for timing.
|
|
rng = random.Random(_SEED_INT)
|
|
|
|
#: Process boot time — real uptime elapsed since container start.
|
|
_PROCESS_START = time.time()
|
|
|
|
#: Deterministic per-instance fake "has been up for this long at boot"
|
|
#: offset, so every decky pretends to have a different history.
|
|
_BOOT_OFFSET = rng.randint(3600, 45 * 86400)
|
|
|
|
|
|
def hostname() -> str:
|
|
return _HOSTNAME
|
|
|
|
|
|
def uptime_seconds() -> int:
|
|
"""Monotonically increasing, unique per instance."""
|
|
return int(_BOOT_OFFSET + (time.time() - _PROCESS_START))
|
|
|
|
|
|
def boot_epoch() -> int:
|
|
"""Fake wall-clock boot time for this instance (seconds since epoch)."""
|
|
return int(time.time() - uptime_seconds())
|
|
|
|
|
|
def instance_uuid(namespace: str = "") -> str:
|
|
"""Deterministic UUID4-looking value for this instance+namespace."""
|
|
ns = uuid.UUID("00000000-0000-0000-0000-000000000000")
|
|
return str(uuid.uuid5(ns, f"{_HOSTNAME}:{namespace}"))
|
|
|
|
|
|
def instance_hex(nbytes: int, namespace: str = "") -> str:
|
|
"""Deterministic hex token of given byte length."""
|
|
material = f"{_HOSTNAME}:{namespace}".encode()
|
|
digest = hashlib.sha256(material).digest()
|
|
while len(digest) < nbytes:
|
|
digest += hashlib.sha256(digest).digest()
|
|
return digest[:nbytes].hex()
|
|
|
|
|
|
def pick(choices: Sequence[T]) -> T:
|
|
"""Deterministic choice from a sequence."""
|
|
return rng.choice(list(choices))
|
|
|
|
|
|
def pick_weighted(choices: Sequence[tuple[T, float]]) -> T:
|
|
"""Deterministic weighted choice. Input: [(item, weight), ...]."""
|
|
total = sum(w for _, w in choices)
|
|
r = rng.uniform(0, total)
|
|
acc = 0.0
|
|
for item, w in choices:
|
|
acc += w
|
|
if r <= acc:
|
|
return item
|
|
return choices[-1][0]
|
|
|
|
|
|
def random_bytes(n: int, namespace: str = "") -> bytes:
|
|
"""Deterministic per-instance byte string of length n."""
|
|
out = bytearray()
|
|
i = 0
|
|
while len(out) < n:
|
|
out.extend(
|
|
hashlib.sha256(f"{_HOSTNAME}:{namespace}:{i}".encode()).digest()
|
|
)
|
|
i += 1
|
|
return bytes(out[:n])
|
|
|
|
|
|
def fresh_bytes(n: int) -> bytes:
|
|
"""Non-deterministic random bytes — for per-connection nonces/salts."""
|
|
return os.urandom(n)
|
|
|
|
|
|
async def jitter(min_ms: int = 5, max_ms: int = 120) -> None:
|
|
"""Async response-time jitter. Uses unseeded RNG so timing varies
|
|
across connections to the same decky — seeded jitter would leak
|
|
predictability."""
|
|
await asyncio.sleep(random.uniform(min_ms, max_ms) / 1000.0)
|
|
|
|
|
|
def jitter_sync(min_ms: int = 5, max_ms: int = 120) -> None:
|
|
"""Blocking jitter for non-asyncio servers."""
|
|
time.sleep(random.uniform(min_ms, max_ms) / 1000.0)
|