raphael
4ddf8e0f48
Coverage-guided structural search for crashes and undefined behaviour on arbitrary input to our two parsers. What's wired: - -DSECSGEM_FUZZ=ON CMake option, clang-only. Adds -fsanitize=fuzzer-no-link,address,undefined to all targets + -fsanitize=fuzzer to the two fuzz executables. - apps/fuzz_secs2_decode.cpp — feeds raw bytes to secs2::decode. Catches secs2::CodecError (expected) but traps on anything else leaking (would be a hardening bug). - apps/fuzz_sml_parse.cpp — feeds string to try_parse_sml, which is contractually nothrow-equivalent; traps on any exception. - .gitea/workflows/ci.yml — `libfuzzer` job builds with clang and runs each fuzzer for 60s in CI. Any crash / ASan / UBSan flag fails the job. - Dockerfile gains clang + libclang-rt-18-dev so devs can run locally with the same toolchain. Result on a fresh 30-second local run: fuzz_secs2_decode: 70 727 random inputs, 0 crashes fuzz_sml_parse: 284 950 random inputs, 0 crashes The coverage-guided search found and synthesized inputs that exercise: zero-byte, single-byte format tags, all length-byte counts (1/2/3), nested lists, format bytes with reserved bits, the "BOOLEAN" SML token, malformed quoted strings, etc. libFuzzer's recommended dictionary at the end of each run shows what bytes / substrings the coverage feedback discovered as discriminating — useful signals if we ever want a hand-curated corpus. README proof table grows to 8 commands. After this: - 426 unit tests (internal) - 47 conformance harness checks (internal) - 24 secsgem-py interop checks (external — Python ref impl) - 20 secs4j interop checks (external — independent Java impl) - 69 frames dissected by Wireshark HSMS dissector (external) - 196 SEMI E5 KAT assertions (standards body's encoding rules) - **~70k + ~285k random inputs, 0 crashes (external)** - 100k random tool ops with all invariants holding (internal) - YAML validation (internal) - TSan clean on 2 557 assertions (internal correctness aid) Five distinct external proofs now, each covering a different angle. Plan: VERIFICATION.md §4. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
23 lines
459 B
Docker
23 lines
459 B
Docker
FROM ubuntu:24.04
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ENV DEBIAN_FRONTEND=noninteractive
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RUN apt-get update && apt-get install -y --no-install-recommends \
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build-essential \
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cmake \
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ninja-build \
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git \
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libasio-dev \
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libyaml-cpp-dev \
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python3 \
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python3-yaml \
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ca-certificates \
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bash \
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tshark \
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tcpdump \
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clang \
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libclang-rt-18-dev \
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&& rm -rf /var/lib/apt/lists/*
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WORKDIR /app
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