anti
620e1f5b1d
Ships the p0f v2.0.8 signature database for passive + active OS fingerprinting. 375 total signatures across four probe contexts: - p0f.fp (262 sigs) — passive SYN fingerprints - p0fa.fp ( 61 sigs) — SYN-ACK response, for active probes - p0fr.fp ( 46 sigs) — RST response quirks - p0fo.fp ( 6 sigs) — "stray" packet fingerprints Replaces reliance on the 10-signature hand-rolled p0f-lite table in decnet/sniffer/p0f.py for any match job the upstream DB covers. Keeping the hand-rolled table as a fallback for modern kernels the v2 DB pre-dates — v2 froze in 2006 so post-Win10 / post-Linux-3.x kernels won't match against upstream directly. DECNET-authored additions will go in a sibling p0f-decnet.fp under GPLv3 (not yet committed; added as the ingester observes real honeypot traffic). Provenance (full chain in data/README.md): - Source: Debian snapshot of p0f_2.0.8.orig.tar.gz - SHA1 matches Debian-recorded 7b4d5b2f24af4b5a299979134bc7f6d7b1eaf875 - Files byte-identical to upstream tarball (verified by hash) License chain: - Upstream: LGPL-2.1 (doc/COPYING preserved verbatim as data/LICENSE.p0f-upstream, Michal Zalewski's copyright intact). - DECNET uses the LGPL-2.1 §3 explicit permission to convert to any version of the GPL. These files, as consumed in DECNET, are effectively GPL-3.0. Chain documented in data/README.md so an auditor sees the full reasoning. - LGPL-2.1 → GPL-3.0 §3 conversion is a settled compat path; same mechanism the kernel uses for LGPL userland glue and many other projects apply daily. Rejected path — nmap-os-db under NPSL — because NPSL adds restrictions GPLv3 §7 prohibits us from accepting. An email is out to Fyodor requesting an open-source-author exception grant, but we don't block on it: p0f v2 is a genuine accuracy improvement in its own right, and adding nmap-osdb later (if granted) plugs into the same provider interface with zero refactor. Directory layout mirrors the established provider-subpackage pattern (see decnet/geoip/, decnet/bus/) per the feedback_provider_ subpackages memory: base + factory + impl/ subpackages, no flat files. Parser + matcher + factory wiring land in the next commit sequence.
73 lines
3.3 KiB
Markdown
73 lines
3.3 KiB
Markdown
# p0f v2 fingerprint database (vendored)
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This directory contains the p0f v2.0.8 TCP/IP fingerprint database as
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published by Michal Zalewski in 2006, vendored here so DECNET's prober
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and profiler can do passive / active OS fingerprinting without a runtime
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network fetch.
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## What's in here
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| File | Purpose | Sigs |
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|-----------------------|-----------------------------------------------|------|
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| `p0f.fp` | SYN fingerprints (passive, incoming) | 262 |
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| `p0fa.fp` | SYN-ACK fingerprints (active probe responses) | 61 |
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| `p0fr.fp` | RST+ fingerprints (reset-response quirks) | 46 |
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| `p0fo.fp` | "stray" fingerprints | 6 |
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| `LICENSE.p0f-upstream`| Verbatim LGPL-2.1 text from upstream | — |
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## Provenance
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**Authoritative source:** Debian snapshot archive, `p0f_2.0.8.orig.tar.gz`.
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- Archive URL: `https://snapshot.debian.org/archive/debian-archive/20120328T092752Z/debian/pool/main/p/p0f/p0f_2.0.8.orig.tar.gz`
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- SHA-1 (upstream-recorded by Debian): `7b4d5b2f24af4b5a299979134bc7f6d7b1eaf875`
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Files in this directory are byte-identical copies of the corresponding
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files inside `p0f_2.0.8.orig.tar.gz::p0f/{doc/COPYING, *.fp}`.
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## License + DECNET-side licensing stance
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Upstream files are licensed under the **GNU Lesser General Public
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License, version 2.1** (see `LICENSE.p0f-upstream` — verbatim copy of
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upstream's `doc/COPYING`). Attribution belongs to Michal Zalewski and
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the named contributors in the original upstream `CREDITS` file.
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DECNET is licensed under **GPL-3.0-or-later**. LGPL-2.1 §3 explicitly
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permits converting an LGPL-2.1 work to any version of the GPL at the
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recipient's choice. DECNET exercises that conversion for the vendored
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files: when consumed as part of DECNET they are effectively under
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GPL-3.0. The upstream LGPL-2.1 notice is preserved so:
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- Recipients of DECNET see the full chain (original LGPL-2.1 → §3
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conversion → GPL-3.0), and
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- Anyone who wants to use these signatures under LGPL-2.1 terms
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(e.g. in an unrelated library) can still do so by pulling the files
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directly from upstream.
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## Modifications to upstream
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**None.** The four `.fp` files in this directory are verbatim copies.
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Any DECNET-authored additions go into a sibling file (`p0f-decnet.fp`,
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currently absent) under GPL-3.0, loaded by the same parser. Keeping
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upstream untouched means:
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1. Syncing future upstream changes is a one-step file replacement.
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2. Attribution is unambiguous: entries in `p0f*.fp` here are Michal's,
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entries in `p0f-decnet.fp` are DECNET's.
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3. If we ever want to contribute signatures back to upstream, it's a
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one-file diff.
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## Refreshing upstream
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```
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curl -O https://snapshot.debian.org/archive/debian-archive/20120328T092752Z/debian/pool/main/p/p0f/p0f_2.0.8.orig.tar.gz
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echo "7b4d5b2f24af4b5a299979134bc7f6d7b1eaf875 p0f_2.0.8.orig.tar.gz" | sha1sum -c
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tar xzf p0f_2.0.8.orig.tar.gz
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cp p0f/p0f.fp p0f/p0fa.fp p0f/p0fr.fp p0f/p0fo.fp decnet/prober/osfp/p0f/data/
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cp p0f/doc/COPYING decnet/prober/osfp/p0f/data/LICENSE.p0f-upstream
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```
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p0f v2 is no longer actively maintained upstream (last release 2006),
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so refreshes are effectively N/A — but the procedure is recorded for
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the case where a mirror we trust publishes a signed rebuild.
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