fips205-slhdsa-verified/verification/check.sh

#!/usr/bin/env bash
# The one-button claim for this repository (rigor invariant R3).
# Green output == the full claim. This script is the ONLY source of the
# word "proven" for this repo.
#
#   Phase 1 — compile the extracted Lean model (gen/SlhVerify).
#   Phase 2 — compile the proof files (Proofs/).
#   Phase 3 — axiom audit: every certificate's #print axioms cone must be a
#             subset of {propext, Classical.choice, Quot.sound} plus the five
#             SHA-2 hash oracles (the documented boundary) — nothing else.
set -euo pipefail

HERE="$(cd "$(dirname "$0")" && pwd)"
source ~/aeneas-toolchain/env.sh
AENEAS_LEAN="$AENEAS_HOME/backends/lean"
TIMEOUT="${LEAN_TIMEOUT:-400}"
MEM="${LEAN_MEM_MB:-4096}"

GEN_MODULES=(
  "SlhVerify/TypesExternal"
  "SlhVerify/Types"
  "SlhVerify/FunsExternal"
  "SlhVerify/Funs"
)
# Proof files, in dependency order.
PROOFS=(
  "ChainSpec"
)
# Certificates whose axiom cones are audited, and the allowed extras beyond
# the three kernel axioms: the five SHA-2 verify-path oracles. A certificate
# is listed here only once it is genuinely proven.
CERTS=(
  "fips205.chain_free_loop_eq"
)
ORACLES="verify_mono.oracle.f, verify_mono.oracle.h, verify_mono.oracle.t_l, verify_mono.oracle.t_len, verify_mono.oracle.h_msg"
ALLOWED="[propext, Classical.choice, Quot.sound, ${ORACLES}]"

echo "fips205-slhdsa-verified — check"
echo "==============================="

# ── Phase 1: model ──────────────────────────────────────────────────────────
echo "=== Phase 1: compile the extracted model ==="
cd "$AENEAS_LEAN"
lake env bash -c "
  set -euo pipefail
  cd '$HERE' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD/gen:\$PWD\"
  compile() { echo \"  · \$1\"; LEAN_TIMEOUT=$TIMEOUT LEAN_MEM_MB=$MEM '$HERE/lean-guard' \"\${1}.lean\" >/dev/null || { echo \"FAIL: \$1\"; exit 1; }; }
  for m in ${GEN_MODULES[*]}; do compile \"gen/\$m\"; done
"

# ── Phase 2: proofs ─────────────────────────────────────────────────────────
echo "=== Phase 2: compile the proofs ==="
cd "$AENEAS_LEAN"
lake env bash -c "
  set -euo pipefail
  cd '$HERE' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD/gen:\$PWD\"
  compile() { echo \"  · \$1\"; LEAN_TIMEOUT=$TIMEOUT LEAN_MEM_MB=$MEM '$HERE/lean-guard' \"Proofs/\${1}.lean\" >/dev/null || { echo \"FAIL: Proofs/\$1\"; exit 1; }; }
  for m in ${PROOFS[*]}; do compile \"\$m\"; done
  # no dead proof files: everything under Proofs/ must be in the manifest
  for f in Proofs/*.lean; do b=\$(basename \"\$f\" .lean)
    case \" ${PROOFS[*]} \" in *\" \$b \"*) ;; *) echo \"DEAD FILE: Proofs/\$b.lean not in manifest\"; exit 1 ;; esac
  done
"

# ── Phase 3: axiom audit ────────────────────────────────────────────────────
echo "=== Phase 3: axiom audit (cone ⊆ kernel-3 + 5 oracles) ==="
cd "$AENEAS_LEAN"
AUD="$HERE/Proofs/.audit.lean"
{ echo "import Proofs.ChainSpec"
  for c in "${CERTS[@]}"; do echo "#print axioms $c"; done
} > "$AUD"
OUT=$(lake env bash -c "cd '$HERE' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD/gen:\$PWD\" && LEAN_TIMEOUT=$TIMEOUT LEAN_MEM_MB=$MEM '$HERE/lean-guard' 'Proofs/.audit.lean'" 2>&1)
rm -f "$AUD"
fail=0
for c in "${CERTS[@]}"; do
  line=$(echo "$OUT" | grep -F "'$c' depends on axioms:" || true)
  if [ -z "$line" ]; then echo "  ✗ $c — no axiom report"; fail=1; continue; fi
  cone=$(echo "$line" | sed "s/.*depends on axioms: //")
  # every axiom in the cone must be in ALLOWED
  bad=$(echo "$cone" | tr -d '[]' | tr ',' '\n' | sed 's/^ *//;s/ *$//' | while read -r ax; do
    [ -z "$ax" ] && continue
    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
      *" $ax "*) ;; *) echo "$ax" ;;
    esac
  done)
  if [ -n "$bad" ]; then echo "  ✗ $c — DISALLOWED axioms: $bad"; fail=1
  else echo "  ✓ $c  cone ⊆ allowed"; fi
done
[ "$fail" = 0 ] || { echo "AXIOM AUDIT FAILED"; exit 1; }

echo
echo "ALL GREEN — model compiles, proofs compile, every certificate cone is"
echo "the three kernel axioms plus (at most) the SHA-2 hash oracles."
echo "Certificates proven: ${CERTS[*]}"