544a2cd647
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Major release. Highlights: - Codec: vendored VaptVupt codec moves to canonical 2.60.4 security release. Fixes a high-severity OOB heap write in the AVX2 decode fast path (reachable on a valid stream sized to exactly content_size, both tail variants). Brings CBMC-formally-verified BCJ filters with automatic ELF/PE/Mach-O detection. Compressed output stays byte-identical (ratio gate Δ 0.00%); wire format unchanged at v1.6. - New --pq-box sealed-box recipient mode (vendored libpqvaptvupt 0.6.0): ML-KEM-768 + X25519 combined via HKDF-SHA256 with domain separation, AES-256-CTR + HMAC-SHA256 EtM. Legacy --pq and --pq-sdk stay readable. - F-16: discloses and fixes a pre-existing data-loss defect in the <= 3.8.0 in-tree BCJ encoder. Full back-compat matrix decodes byte-exact under 4.0.0; every readable pre-4.0 archive remains readable. Repository hygiene: - Sync full 4.0.0 source tree (codec, crypto, SDK, GUI, packaging, tests). - Remove internal scratch files (PROMPT.md, FORMAL_AUDIT_PROMPT.md) and superseded version-specific docs (INTEGRATION_PROTOCOL_2.60.4.md, docs/FINDINGS-2.x.md) and a stray test binary. - Refresh README download/install section to real 4.0.0 release assets; bump version badge to 4.0.0. - Add .gitignore for build outputs (keeps vendored prebuilt libraries).
63 lines
2.4 KiB
Shell
Executable file
63 lines
2.4 KiB
Shell
Executable file
#!/bin/bash
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# Copyright (c) 2025-2026 Cristian Cezar Moisés
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#
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# dudect-style constant-time verification of zupt_ct_memeq (v3.5.0).
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# Builds at -O2 (the shipped optimisation level — so this tests the code
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# as users run it, including that the volatile accumulator survives the
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# optimiser) and runs the Welch t-test harness.
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#
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# Verdict is environment-relative: zupt_ct_memeq's data-dependent timing
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# signal must be a small fraction (<=20%) of leaky memcmp measured in the
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# same environment. On a dedicated box the ratio is ~0; on this shared
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# vCPU it lands near 1%. If the host is too coarse for even memcmp to
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# show a leak, the test reports INCONCLUSIVE (exit 0) rather than
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# passing vacuously.
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set -u
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SDK_DIR="${ZUPTSDK_DIR:-vendor/zuptsdk}"
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ARCH=$(uname -m)
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if [ "$ARCH" = "x86_64" ] || [ "$ARCH" = "i686" ]; then
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SHANI="-msha -mssse3 -msse4.1"
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else
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SHANI=""
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fi
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TMP=$(mktemp -d)
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if gcc -Iinclude -Isrc -I"$SDK_DIR/include" -Wall -Wextra -Werror $SHANI -O2 -std=c11 \
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tests/test_ct_timing.c \
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src/zupt_crypto.c src/zupt_sha256.c src/zupt_sha256_shani.c src/zupt_aes256.c \
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src/zupt_xxh.c src/zupt_keccak.c src/zupt_x25519.c src/zupt_mlkem.c \
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src/zupt_cpuid.c src/zupt_mlock.c \
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-L"$SDK_DIR" -lzuptsdk -Wl,-rpath,"$(cd "$SDK_DIR" && pwd)" -lm \
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-o "$TMP/t" 2>"$TMP/cc.log"; then
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"$TMP/t"; rc=$?
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else
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echo " ✗ constant-time test failed to compile"
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head -15 "$TMP/cc.log" | sed 's/^/ /'
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rc=1
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fi
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rm -rf "$TMP"
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# Source-routing guard: the security-critical compares must use the single
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# audited zupt_ct_memeq primitive, not a reintroduced inline byte-OR loop.
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# This is what makes the 32-byte timing proof transfer to the ML-KEM
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# 1088-byte decaps compare (same function, length-independent).
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echo ""
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echo " -- source routing (audited primitive) --"
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ROUTE_OK=0
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if grep -q "zupt_ct_memeq(ct, ct_prime, 1088)" src/zupt_mlkem.c; then
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echo " ✓ ML-KEM decaps compare routes through zupt_ct_memeq"
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else
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echo " ✗ ML-KEM decaps compare does NOT use zupt_ct_memeq (inline loop regressed?)"
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ROUTE_OK=1
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fi
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# The decaps path must not contain a raw 1088-byte inline OR-compare anymore.
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if grep -qE "for *\(int i = 0; i < 1088;" src/zupt_mlkem.c; then
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echo " ✗ raw 1088-byte inline compare loop present in zupt_mlkem.c"
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ROUTE_OK=1
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else
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echo " ✓ no raw 1088-byte inline compare loop in zupt_mlkem.c"
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fi
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[ "$rc" = 0 ] && rc=$ROUTE_OK
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exit $rc
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