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.
88 lines
3.4 KiB
Python
88 lines
3.4 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Fake ``~/.aws/credentials`` block (passive bait).
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This is the **passive** variant — no callback wiring. An attacker
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who exfils these keys can't trip a detection unless we run a real
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AWS account with a deny-all CloudTrail listener (post-v1). The
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realism is the point: the file looks like a routinely used credentials
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file, so the rest of the decky's persona feels lived-in.
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If the operator picks ``kind="aws_passive"`` we accept that no slug
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will be embedded. If they pick ``kind="http"`` or ``kind="dns"`` for
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this generator, the API will reject the combination with a 400 — AWS
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keys have no plausible field where a URL or hostname survives a
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``grep -E '[A-Z0-9]{20}'`` smell test.
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"""
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from __future__ import annotations
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import hashlib
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from secrets import token_urlsafe
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from decnet.canary.base import CanaryArtifact, CanaryContext, CanaryGenerator
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# Stable AWS-style key body derived from the slug. Keeping the
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# generator deterministic (per-slug) means re-seeding produces the
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# same bytes — the planter is naturally idempotent and an operator
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# who runs ``decnet canary verify`` can re-derive the expected file
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# without touching the DB.
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def _fake_access_key(seed: str) -> str:
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# AWS access keys are 20 chars, uppercase alphanum, AKIA prefix.
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body = hashlib.sha256(seed.encode()).hexdigest().upper()
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return "AKIA" + body[:16]
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def _fake_secret_key(seed: str) -> str:
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# AWS secret keys are 40 chars, mixed-case base64-ish. We use
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# base64-safe characters from token_urlsafe seeded by a SHA-256
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# of the seed so the output is stable per slug.
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h = hashlib.sha256(("secret:" + seed).encode()).digest()
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# Reuse token_urlsafe for the alphabet but pad to 40 chars from
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# the deterministic bytes so we don't depend on os.urandom.
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import base64
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return base64.b64encode(h)[:40].decode()
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class AWSCredsGenerator(CanaryGenerator):
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name = "aws_creds"
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def generate(self, ctx: CanaryContext) -> CanaryArtifact:
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seed = ctx.callback_token
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access = _fake_access_key(seed)
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secret = _fake_secret_key(seed)
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body = (
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"[default]\n"
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f"aws_access_key_id = {access}\n"
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f"aws_secret_access_key = {secret}\n"
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"region = us-east-1\n"
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"\n"
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"[prod]\n"
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f"aws_access_key_id = {_fake_access_key('prod-' + seed)}\n"
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f"aws_secret_access_key = {_fake_secret_key('prod-' + seed)}\n"
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"region = us-west-2\n"
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)
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return CanaryArtifact(
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path="", # caller (planter) fills this from CanaryToken.placement_path
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content=body.encode("utf-8"),
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mode=0o600,
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mtime_offset=-86400 * 14, # 2 weeks ago — looks lived-in
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generator=self.name,
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notes=[
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"fake AWS keys; no callback embedded — passive bait only",
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f"derived deterministically from slug={seed}",
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],
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)
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# Re-exported so the slug helper is reusable from the
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# instrumenters/passthrough module without an internal import path.
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__all__ = ["AWSCredsGenerator", "_fake_access_key", "_fake_secret_key"]
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# Imports at the bottom keep the public dataclasses on top — pylint
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# doesn't run on this repo, but tests do, and putting ``token_urlsafe``
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# in a public symbol confuses readers. Suppress the unused warning by
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# referencing it once.
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_ = token_urlsafe
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