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Optimize OEMCrypto_ShrinkUsageTableHeader fuzzing

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Merge from Widevine repo of http://go/wvgerrit/159057

Increase fuzzing efficiency by generating the header_buffer_length
parameter from the input data and pre-creating a usage table header.

Test: tested with http://go/ag/20420224

Change-Id: Idab4c3d0ae879854202e5ffd24bf031b946aeb6a
This commit is contained in:
Ian Benz
2022-11-08 13:53:09 -08:00
committed by Fred Gylys-Colwell
parent 2e9cbaf30f
commit e88bcf51c8
4 changed files with 14 additions and 10 deletions
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2
libwvdrmengine/oemcrypto/test/fuzz_tests/oemcrypto_generic_verify_fuzz.cc
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@@ -57,7 +57,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
session->license().keys[0].key_id_length,
fuzzed_structure.cipher_mode);
signature_length =
std::min(MAX_FUZZ_SIGNATURE_LENGTH, fuzzed_structure.signature_length);
std::min(MAX_FUZZ_OUTPUT_LENGTH, fuzzed_structure.signature_length);
signature.resize(signature_length);
OEMCrypto_Generic_Verify(session->session_id(), in_buffer.data(),
in_buffer.size(), fuzzed_structure.algorithm,