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Clean up fuzz helper classes

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- Remove OEMCrypto state changes hidden in constructors and destructors.
- Use composition instead of inheritance to structure classes.
- Avoid calling non-trivial destructors for objects with static
  lifetime.

Merged from https://widevine-internal-review.googlesource.com/168497
Merged from https://widevine-internal-review.googlesource.com/171170
Merged from https://widevine-internal-review.googlesource.com/171171
Merged from https://widevine-internal-review.googlesource.com/171870

Change-Id: I20476a7b1132d11f011b8650ec01e3c2dc3fc0e8
This commit is contained in:
Ian Benz
2023-03-20 17:46:15 +00:00
committed by Robert Shih
parent af070601b0
commit 53fe55cb72
30 changed files with 518 additions and 398 deletions
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36
libwvdrmengine/oemcrypto/test/fuzz_tests/oemcrypto_load_renewal_fuzz.cc
View File

@@ -2,41 +2,41 @@
// source code may only be used and distributed under the Widevine
// License Agreement.
#include "FuzzedDataProvider.h"
#include "oemcrypto_fuzz_helper.h"
#include "oemcrypto_fuzz_structs.h"
namespace wvoec {
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
// Redirect printf and log statements from oemcrypto functions to a file to
// reduce noise
RedirectStdoutToFile();
if (size < sizeof(OEMCrypto_Renewal_Response_Fuzz)) {
return 0;
}
wvoec::RedirectStdoutToFile();
// Copy input data to OEMCrypto_Renewal_Response_Fuzz and rest of message
// into encrypted license_renewal_response.
OEMCrypto_Renewal_Response_Fuzz fuzzed_data;
memcpy(&fuzzed_data, data, sizeof(fuzzed_data));
const uint8_t* renewal_response =
data + sizeof(OEMCrypto_Renewal_Response_Fuzz);
const size_t renewal_response_size =
size - sizeof(OEMCrypto_Renewal_Response_Fuzz);
wvoec::OEMCrypto_Renewal_Response_Fuzz fuzzed_structure;
if (size < sizeof(fuzzed_structure)) {
return 0;
}
FuzzedDataProvider fuzzed_data(data, size);
fuzzed_data.ConsumeData(&fuzzed_structure, sizeof(fuzzed_structure));
const std::vector<uint8_t> renewal_response =
fuzzed_data.ConsumeRemainingBytes<uint8_t>();
OEMCryptoRenewalAPIFuzz renewal_response_fuzz;
wvoec::OEMCryptoRenewalAPIFuzz renewal_response_fuzz;
renewal_response_fuzz.Intialize();
renewal_response_fuzz.license_messages().SignAndVerifyRequest();
renewal_response_fuzz.license_messages().CreateDefaultResponse();
// Inject timer limits from fuzzed input to timer_limits field from
// core license response.
renewal_response_fuzz.license_messages().InjectFuzzedTimerLimits(fuzzed_data);
renewal_response_fuzz.license_messages().InjectFuzzedTimerLimits(
fuzzed_structure);
renewal_response_fuzz.license_messages().EncryptAndSignResponse();
renewal_response_fuzz.license_messages().LoadResponse();
// Call renewal response API using fuzzed data.
renewal_response_fuzz.renewal_messages().SignAndVerifyRequest();
renewal_response_fuzz.renewal_messages().InjectFuzzedResponseData(
fuzzed_data, renewal_response, renewal_response_size);
fuzzed_structure, renewal_response.data(), renewal_response.size());
renewal_response_fuzz.renewal_messages().LoadResponse();
renewal_response_fuzz.Terminate();
return 0;
}
} // namespace wvoec