31fa4028aa
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The SDK-mode regression tests (audit, F-08/F-10/F-11/F-12, pq-box, KDF transparency) now skip cleanly when built without libzuptsdk, and the constant-time test links libzuptsdk only when present (its primitives are native). Also drop a dead 'seqs_decoded' variable in vv_ans.c that failed the exact-size test's -Werror=unused-but-set-variable. 'make check' is green source-only, so the openSUSE %check no longer blocks the build.
70 lines
2.7 KiB
Shell
Executable file
70 lines
2.7 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=$(mktemp -d)
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# This test uses only native CT primitives (zupt_ct_memeq, ML-KEM CT compare);
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# the libzuptsdk linkage is vestigial. Link it only when the vendored library
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# is present (WITH_SDK builds); source-only builds compile+run without it.
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SDK_LINK=""
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if ls "$SDK_DIR"/libzuptsdk.so* >/dev/null 2>&1; then
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SDK_LINK="-L$SDK_DIR -lzuptsdk -Wl,-rpath,$(cd "$SDK_DIR" && pwd)"
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fi
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if gcc -Iinclude -Isrc -I"$SDK_DIR/include" -Wall -Wextra -Werror $SHANI -O2 -std=c11 \
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tests/test_ct_timing.c \
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src/zupt_crypto.c src/zupt_sha256.c src/zupt_sha256_shani.c src/zupt_aes256.c \
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src/zupt_xxh.c src/zupt_keccak.c src/zupt_x25519.c src/zupt_mlkem.c \
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src/zupt_cpuid.c src/zupt_mlock.c \
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$SDK_LINK -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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