CBOR fuzzing

[maxtropets]

No description provided.

[Copilot]

Pull request overview

Adds a libFuzzer target for the CBOR parser/serializer, plus a seed corpus and CI execution to continuously exercise CBOR decoding/encoding paths in src/crypto/.

Changes:

• Introduce cbor_fuzz_test fuzz target (LLVMFuzzerTestOneInput) which parses CBOR then round-trips serialize/parse/serialize.
• Add a set of seed CBOR corpus inputs under src/crypto/test/cbor_fuzz_corpus/.
• Add CMake/CI plumbing to build and run the fuzz target when -DFUZZING=ON.

Reviewed changes

Copilot reviewed 41 out of 48 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/crypto/test/cbor_fuzz.cpp	New libFuzzer harness for CBOR parse/serialize/to_string round-trips.
cmake/preproject.cmake	Adds FUZZING option and blocks FUZZING+TSAN.
cmake/common.cmake	Adds add_fuzz_test() wrapper to build fuzz executables with libFuzzer flags.
CMakeLists.txt	Adds cbor_fuzz_test target under BUILD_TESTS when FUZZING is enabled.
.github/workflows/long-test.yml	Builds and runs cbor_fuzz_test for a short time in CI, seeded from corpus dir.
src/crypto/test/cbor_fuzz_corpus/array123	Seed CBOR corpus entry (array sample).
src/crypto/test/cbor_fuzz_corpus/array_of_maps	Seed CBOR corpus entry (array-of-maps sample).
src/crypto/test/cbor_fuzz_corpus/array_with_map	Seed CBOR corpus entry (array-with-map sample).
src/crypto/test/cbor_fuzz_corpus/bstr_hello	Seed CBOR corpus entry (byte-string “hello”).
src/crypto/test/cbor_fuzz_corpus/complex_array_map	Seed CBOR corpus entry (mixed complex structure).
src/crypto/test/cbor_fuzz_corpus/cose_receipt	Seed CBOR corpus entry (COSE receipt-shaped CBOR).
src/crypto/test/cbor_fuzz_corpus/cose_sign1_detached	Seed CBOR corpus entry (COSE_Sign1 detached payload shape).
src/crypto/test/cbor_fuzz_corpus/cose_sign1_flat	Seed CBOR corpus entry (COSE_Sign1 flat shape).
src/crypto/test/cbor_fuzz_corpus/cose_sign1_nested	Seed CBOR corpus entry (COSE_Sign1 nested shape).
src/crypto/test/cbor_fuzz_corpus/deeply_nested_array	Seed CBOR corpus entry (nested arrays).
src/crypto/test/cbor_fuzz_corpus/empty	Seed CBOR corpus entry (empty input).
src/crypto/test/cbor_fuzz_corpus/empty_array	Seed CBOR corpus entry (empty array).
src/crypto/test/cbor_fuzz_corpus/empty_bytes	Seed CBOR corpus entry (empty byte string).
src/crypto/test/cbor_fuzz_corpus/empty_map	Seed CBOR corpus entry (empty map).
src/crypto/test/cbor_fuzz_corpus/empty_string	Seed CBOR corpus entry (empty text string).
src/crypto/test/cbor_fuzz_corpus/header_map_footer	Seed CBOR corpus entry (map with header/footer-like fields).
src/crypto/test/cbor_fuzz_corpus/int64_max	Seed CBOR corpus entry (int64 max boundary).
src/crypto/test/cbor_fuzz_corpus/int64_min	Seed CBOR corpus entry (int64 min boundary).
src/crypto/test/cbor_fuzz_corpus/int64_overflow	Seed CBOR corpus entry (oversized integer encoding).
src/crypto/test/cbor_fuzz_corpus/int_widths	Seed CBOR corpus entry (various integer widths).
src/crypto/test/cbor_fuzz_corpus/map1234	Seed CBOR corpus entry (simple map sample).
src/crypto/test/cbor_fuzz_corpus/map_bool_vals	Seed CBOR corpus entry (map with boolean/simple values).
src/crypto/test/cbor_fuzz_corpus/map_multi_arrays	Seed CBOR corpus entry (map containing multiple arrays).
src/crypto/test/cbor_fuzz_corpus/map_neg_keys	Seed CBOR corpus entry (map with negative integer keys).
src/crypto/test/cbor_fuzz_corpus/map_str_str	Seed CBOR corpus entry (map of string->string).
src/crypto/test/cbor_fuzz_corpus/map_with_array	Seed CBOR corpus entry (map containing an array).
src/crypto/test/cbor_fuzz_corpus/mixed_array	Seed CBOR corpus entry (array with mixed types).
src/crypto/test/cbor_fuzz_corpus/negint1	Seed CBOR corpus entry (negative integer sample).
src/crypto/test/cbor_fuzz_corpus/nested_arrays	Seed CBOR corpus entry (nested arrays variant).
src/crypto/test/cbor_fuzz_corpus/nested_tags	Seed CBOR corpus entry (nested tags).
src/crypto/test/cbor_fuzz_corpus/simple_false	Seed CBOR corpus entry (simple value false).
src/crypto/test/cbor_fuzz_corpus/simple_null	Seed CBOR corpus entry (simple value null).
src/crypto/test/cbor_fuzz_corpus/simple_true	Seed CBOR corpus entry (simple value true).
src/crypto/test/cbor_fuzz_corpus/simple_undefined	Seed CBOR corpus entry (simple value undefined).
src/crypto/test/cbor_fuzz_corpus/tagged_array	Seed CBOR corpus entry (tagged array).
src/crypto/test/cbor_fuzz_corpus/tagged_bool	Seed CBOR corpus entry (tagged boolean/simple).
src/crypto/test/cbor_fuzz_corpus/tagged_bytes	Seed CBOR corpus entry (tagged byte string).
src/crypto/test/cbor_fuzz_corpus/tagged_empty_array	Seed CBOR corpus entry (tagged empty array).
src/crypto/test/cbor_fuzz_corpus/tagged_int	Seed CBOR corpus entry (tagged integer).
src/crypto/test/cbor_fuzz_corpus/tagged_map	Seed CBOR corpus entry (tagged map).
src/crypto/test/cbor_fuzz_corpus/tagged_string	Seed CBOR corpus entry (tagged text string).
src/crypto/test/cbor_fuzz_corpus/tstr_hello	Seed CBOR corpus entry (text-string “hello”).
src/crypto/test/cbor_fuzz_corpus/uint42	Seed CBOR corpus entry (unsigned int 42).