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https://github.com/saymrwulf/betrusted-ed25519-verified.git
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mrwulf
6120f9bb17
Transpile the Scalar52 limb backend (backend::serial::u64::scalar
add/sub/mul/square/montgomery_*) from Rust to Lean via Charon/Aeneas,
scoped at the function level to the iterator-free arithmetic core.
- verification/extract-scalar.sh: function-level Charon/Aeneas extraction
- verification/gen/CurveScalar/{Types,Funs}.lean: transpiled model (27 defs).
This fork (v4.1.2) implements Scalar52::sub's constant-time conditional add
with a pure arithmetic mask (constants::L[i] & underflow_mask), so the
extraction pulls in NO external functions or types (unlike v5 dalek, which
routes sub through subtle, and v4.1.3, which uses a local black_box).
- verification/gen/CurveScalar/{TypesExternal,FunsExternal}.lean: decl-free
stub modules kept so the check manifest is uniform across forks.
- verification/Proofs/ScalarDenote.lean: semantic foundation — Scalar52
denotation into ℤ/ℓℤ, limb-bound invariant, and L_val (the transpiled
constants::L denotes exactly the group order ℓ, kernel-checked).
- verification/check-scalar.sh: guarded compile of the gen modules plus the
denotation foundation.
check-scalar.sh passes: gen compiles; denotation + L = ℓ proven.
add/sub/mul remain in progress.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
25 lines
1.2 KiB
Bash
Executable file
25 lines
1.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Scalar-layer check (Scalar52 arithmetic mod ℓ). Compiles the gen model + the
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# proven foundation. add/sub (Range-loop reductions) and the Montgomery mul
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# path are in progress — see README. Guarded compiles throughout.
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set -uo pipefail
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source ~/aeneas-toolchain/env.sh
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HERE="$(cd "$(dirname "$0")" && pwd)"
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AENEAS_LEAN="$AENEAS_HOME/backends/lean"
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GEN=(CurveScalar/TypesExternal CurveScalar/Types CurveScalar/FunsExternal CurveScalar/Funs)
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PROOFS=(ScalarDenote)
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echo "=== stub/axiom audit ==="
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grep -rnE '^(private |protected |noncomputable )*axiom ' "$HERE"/Proofs/Scalar*.lean 2>/dev/null && { echo "axiom under Proofs/"; exit 1; }
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echo " clean"
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echo "=== compile (guarded) ==="
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cd "$AENEAS_LEAN"
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lake env bash -c "
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set -uo pipefail
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cd '$HERE/gen' && export LEAN_PATH=\"\$LEAN_PATH:\$PWD:$HERE\"
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for m in ${GEN[*]}; do echo \" · gen \$m\"; LEAN_TIMEOUT=300 LEAN_MEM_MB=6144 '$HERE/lean-guard' \"\$m.lean\" || exit 1; done
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cd '$HERE'
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for m in ${PROOFS[*]}; do echo \" · proof \$m\"; LEAN_TIMEOUT=300 LEAN_MEM_MB=6144 '$HERE/lean-guard' \"Proofs/\$m.lean\" || exit 1; done
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" || { echo FAIL; exit 1; }
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echo ""
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echo "SCALAR FOUNDATION: gen compiles; denotation + group-order constant (L = ℓ) proven."
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