The crypt2_load_fuzz fuzzer needs to calculate LUKS2 header checksum
to speed up fuzzing. Currently we incorrectly touch const data input.
This patch
- calculates only primary LUKS2 header checksum (ignores secondary header)
- uses temporary struct for modified data
- keps fuzzer going even with original data if checksum calc fails.
Hopefully solves unknown write issue in fuzzer (not real utils) on oss-fuzz.
- Do not require any libraries installed, download everything
from upstream git, statically compile (use include, libs and pkg-config
from local directory under tests/fuzz).
Script should work both from OSS-Fuzz and locally.
- Do not require local protobuf (only staticallly compiled, see above).
- Add README.md (TBD, still not finished).
- Fix make dist and distcheck.
- Remove common.[ch] as we can use internal function.
This makes fuzzers also C++ only (remove CFLAGS from Makefile).
