mirror of
https://github.com/saymrwulf/fips205-slhdsa-verified.git
synced 2026-09-04 20:03:44 +00:00
mrwulf
53c5b45e3f
The gate-0 fn-pointer blocker is cleared. This commits the phase-1 deliverable: - verification/extract.sh: re-pointed at the monomorphic root crate::verify_mono::slh_verify_128s with crate::verify_mono::oracle as the opaque SHA-2 boundary (against fips205-source @ 2d89ee3). - verification/gen/SlhVerify: the extracted Lean model — 62 defs, the full verify cone (chain -> wots -> xmss -> ht -> fors -> slh_verify_internal) up to the apex verify_mono.slh_verify_128s. No sorry, no admit. - verification/gen/SlhVerify/FunsExternal.lean + TypesExternal.lean: hand-maintained externals with the two-class justification header — (1) the five SHA-2 hash oracles = the deliberate cryptographic boundary (the only axioms the apex certificate will carry beyond Lean's three); (2) transpiler plumbing (try_from, is_err, iterator Step/Take, zeroize) adopted as axioms for the phase-1 type-check, to be discharged in the proof phase. - verification/check.sh: real Phase-1 button — compiles the model under lean-guard (memory-capped, serialized). GREEN. Still says NOTHING PROVEN: a well-formed model is not a correct one. Zero certificates. Proof layers (chain semantics -> ... -> acceptance equation) are the next task. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
49 lines
2.3 KiB
Bash
Executable file
49 lines
2.3 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Regenerate the Lean model in gen/ from the pinned fips205 snapshot.
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#
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# SCOPE: the SLH-DSA verify path, parameter set SLH-DSA-SHA2-128s
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# roots: slh_verify(_internal), fors_pk_from_sig, ht_verify,
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# xmss_pk_from_sig, wots_pk_from_sig, chain
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# (sign/keygen are out of scope; the six hash oracles are opaque —
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# see TRUSTED-BASE.md.)
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#
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# Rust --charon--> SlhVerify.llbc --aeneas--> gen/SlhVerify/*.lean
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#
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# PHASE-1 PRECONDITION (gate-0 finding, 2026-07-22): upstream models the
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# hash family as `crate::hashers::Hashers`, a struct of plain function
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# pointers, which Aeneas cannot translate (3 unique errors, the only
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# obstruction in the whole cone). Until the Aeneas-compat patch in
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# fips205-source replaces that struct with named opaque free functions
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# on the verify path (the curve25519-dalek-source sha512-shim pattern),
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# this script produces a PARTIAL model. Do not build proofs on a partial
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# model; check.sh stays non-green until extraction is clean.
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#
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# Usage: ./extract.sh
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set -euo pipefail
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source ~/aeneas-toolchain/env.sh
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HERE="$(cd "$(dirname "$0")" && pwd)"
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CRATE=~/GitClone/FormalVerification/sources/fips205-source
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echo "[1/2] charon: Rust -> LLBC (monomorphic SHA2-128s verify cone;"
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echo " crate::verify_mono::oracle is the opaque SHA-2 boundary)"
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cd "$CRATE"
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# Single extraction root: the monomorphic entry. The five hash primitives
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# are reached through crate::verify_mono::oracle, marked opaque here — this
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# is the deliberate SHA-2 trust boundary (documented in TRUSTED-BASE.md).
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# The generic Hashers fn-pointer path is NOT in this cone by construction.
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charon cargo --preset=aeneas \
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--start-from 'crate::verify_mono::slh_verify_128s' \
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--opaque 'crate::verify_mono::oracle' \
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--opaque 'sha2' --opaque 'sha3' --opaque 'zeroize' --opaque 'rand_core' \
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--hide-marker-traits \
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--dest-file "$HERE/SlhVerify.llbc" \
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-- --no-default-features --features slh_dsa_sha2_128s
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echo "[2/2] aeneas: LLBC -> Lean (split files, SlhVerify.* modules;"
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echo " hand-maintained TypesExternal.lean / FunsExternal.lean are"
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echo " NOT overwritten once they exist)"
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cd "$HERE"
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aeneas -backend lean -split-files -subdir SlhVerify -dest gen SlhVerify.llbc
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echo "Done. Now run ./check.sh (expect non-green until phase 1 lands)."
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