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https://github.com/saymrwulf/fips205-slhdsa-verified.git
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mrwulf
2267e04d10
fips205.ht_loop_eq (Proofs/HtSpec.lean): the extracted ht_verify_free_loop equals the explicit d-layer fold — at layer j: idx_leaf = idx_tree masked to h' bits (mask+cast), idx_tree >>= h', layer address j, tree address to the shifted index, node recomputed through xmss_pk_from_sig on the j-th XMSS signature. Pins the hypertree layer schedule; the final node == pk_root comparison sits one bind above in ht_verify_free (apex material). Exact cone: [propext, Classical.choice, Quot.sound, verify_mono.oracle.f, verify_mono.oracle.h, verify_mono.oracle.t_l] — kernel-3 plus exactly the three hash primitives the referenced WOTS+/XMSS machinery touches. THE LAYER'S OBSTRUCTION (one per layer, on pattern) was not the proof but the CONE: the first extraction of this loop carried Result-conversion plumbing (try_from/is_err/unwrap; transitively a Take iterator and the &u32 Sub instance) — all axioms, rightly rejected by the Phase-3 audit. Fixed at SOURCE level (fips205-source 6f6a9d6, 8 sites, semantics identical for every FIPS 205 parameter set, differential test re-run green), then re-extracted: the loop body is now straight-line and the proof is the plain chain/wots recipe (no branches; base case via loop.eq_1; step lemma closes by rfl; induction = bind_congr ×12). Also in this commit: - gen/ regenerated from the patched snapshot (loop bodies of the three prior certificates byte-identical modulo source line comments; all three proofs recompiled unchanged and re-audited green). - Dead-stub deletion (axiom-shadowing hygiene rule): the five obsoleted plumbing axioms + vestigial take.default removed from FunsExternal, the orphaned TryFromIntError type axiom removed from TypesExternal. The model's external surface is now: 5 SHA-2 oracles (the boundary), the Take iterator machinery used only by helpers::to_int (apex round's de-plumbing item), 3 zeroize blanket impls (never on the verify path), and the discharged-real u32 Step defs. - check.sh: PROOFS += HtSpec, CERTS += fips205.ht_loop_eq, audit import (self-test structure anchors untouched). README: four certificates + the de-plumbing record. Fidelity review at authorship (three-way): extracted body == Rust ht_verify_free (verbatim from upstream hypertree.rs, calls -> *_free) == FIPS 205 Algorithm 12, incl. mask-then-shift order and layer-then-tree address order. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
101 lines
4.6 KiB
Bash
Executable file
101 lines
4.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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# The one-button claim for this repository (rigor invariant R3).
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# Green output == the full claim. This script is the ONLY source of the
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# word "proven" for this repo.
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#
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# Phase 1 — compile the extracted Lean model (gen/SlhVerify).
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# Phase 2 — compile the proof files (Proofs/).
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# Phase 3 — axiom audit: every certificate's #print axioms cone must be a
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# subset of {propext, Classical.choice, Quot.sound} plus the five
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# SHA-2 hash oracles (the documented boundary) — nothing else.
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set -euo pipefail
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HERE="$(cd "$(dirname "$0")" && pwd)"
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source ~/aeneas-toolchain/env.sh
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AENEAS_LEAN="$AENEAS_HOME/backends/lean"
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TIMEOUT="${LEAN_TIMEOUT:-400}"
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MEM="${LEAN_MEM_MB:-4096}"
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GEN_MODULES=(
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"SlhVerify/TypesExternal"
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"SlhVerify/Types"
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"SlhVerify/FunsExternal"
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"SlhVerify/Funs"
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)
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# Proof files, in dependency order.
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PROOFS=(
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"ChainSpec"
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"WotsSpec"
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"XmssSpec"
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"HtSpec"
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)
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# Certificates whose axiom cones are audited, and the allowed extras beyond
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# the three kernel axioms: the five SHA-2 verify-path oracles. A certificate
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# is listed here only once it is genuinely proven.
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CERTS=(
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"fips205.chain_free_loop_eq"
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"fips205.wots_loop1_eq"
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"fips205.xmss_loop_eq"
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"fips205.ht_loop_eq"
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)
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ORACLES="verify_mono.oracle.f, verify_mono.oracle.h, verify_mono.oracle.t_l, verify_mono.oracle.t_len, verify_mono.oracle.h_msg"
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ALLOWED="[propext, Classical.choice, Quot.sound, ${ORACLES}]"
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echo "fips205-slhdsa-verified — check"
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echo "==============================="
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# ── Phase 1: model ──────────────────────────────────────────────────────────
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echo "=== Phase 1: compile the extracted model ==="
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cd "$AENEAS_LEAN"
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lake env bash -c "
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set -euo pipefail
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cd '$HERE' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD/gen:\$PWD\"
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compile() { echo \" · \$1\"; LEAN_TIMEOUT=$TIMEOUT LEAN_MEM_MB=$MEM '$HERE/lean-guard' \"\${1}.lean\" >/dev/null || { echo \"FAIL: \$1\"; exit 1; }; }
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for m in ${GEN_MODULES[*]}; do compile \"gen/\$m\"; done
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"
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# ── Phase 2: proofs ─────────────────────────────────────────────────────────
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echo "=== Phase 2: compile the proofs ==="
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cd "$AENEAS_LEAN"
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lake env bash -c "
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set -euo pipefail
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cd '$HERE' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD/gen:\$PWD\"
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compile() { echo \" · \$1\"; LEAN_TIMEOUT=$TIMEOUT LEAN_MEM_MB=$MEM '$HERE/lean-guard' \"Proofs/\${1}.lean\" >/dev/null || { echo \"FAIL: Proofs/\$1\"; exit 1; }; }
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for m in ${PROOFS[*]}; do compile \"\$m\"; done
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# no dead proof files: everything under Proofs/ must be in the manifest
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for f in Proofs/*.lean; do b=\$(basename \"\$f\" .lean)
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case \" ${PROOFS[*]} \" in *\" \$b \"*) ;; *) echo \"DEAD FILE: Proofs/\$b.lean not in manifest\"; exit 1 ;; esac
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done
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"
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# ── Phase 3: axiom audit ────────────────────────────────────────────────────
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echo "=== Phase 3: axiom audit (cone ⊆ kernel-3 + 5 oracles) ==="
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cd "$AENEAS_LEAN"
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AUD="$HERE/Proofs/.audit.lean"
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{ echo "import Proofs.ChainSpec"; echo "import Proofs.WotsSpec"
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echo "import Proofs.XmssSpec"; echo "import Proofs.HtSpec"
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for c in "${CERTS[@]}"; do echo "#print axioms $c"; done
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} > "$AUD"
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OUT=$(lake env bash -c "cd '$HERE' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD/gen:\$PWD\" && LEAN_TIMEOUT=$TIMEOUT LEAN_MEM_MB=$MEM '$HERE/lean-guard' 'Proofs/.audit.lean'" 2>&1)
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rm -f "$AUD"
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fail=0
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for c in "${CERTS[@]}"; do
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line=$(echo "$OUT" | grep -F "'$c' depends on axioms:" || true)
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if [ -z "$line" ]; then echo " ✗ $c — no axiom report"; fail=1; continue; fi
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cone=$(echo "$line" | sed "s/.*depends on axioms: //")
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# every axiom in the cone must be in ALLOWED
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bad=$(echo "$cone" | tr -d '[]' | tr ',' '\n' | sed 's/^ *//;s/ *$//' | while read -r ax; do
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[ -z "$ax" ] && continue
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case " propext Classical.choice Quot.sound verify_mono.oracle.f verify_mono.oracle.h verify_mono.oracle.t_l verify_mono.oracle.t_len verify_mono.oracle.h_msg " in
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*" $ax "*) ;; *) echo "$ax" ;;
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esac
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done)
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if [ -n "$bad" ]; then echo " ✗ $c — DISALLOWED axioms: $bad"; fail=1
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else echo " ✓ $c cone ⊆ allowed"; fi
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done
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[ "$fail" = 0 ] || { echo "AXIOM AUDIT FAILED"; exit 1; }
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echo
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echo "ALL GREEN — model compiles, proofs compile, every certificate cone is"
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echo "the three kernel axioms plus (at most) the SHA-2 hash oracles."
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echo "Certificates proven: ${CERTS[*]}"
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