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Merge of OEMCrypto fuzz test CLs

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Fix oemcrypto_generic_verify_fuzz mutator signature offset

[ Merge of http://go/wvgerrit/165899 ]

Merged from https://widevine-internal-review.googlesource.com/165598

Change-Id: I85574fcd62622d2954c306688e04ecfda333c0cb

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Fix regressions in oemcrypto_decrypt_cenc_fuzz

[ Merge of http://go/wvgerrit/162151 ]

Fix null-dereference of subsamples vector and potential memory leak due
to parsing errors.

Bug: 260005865
Bug: 260013015

Merged from https://widevine-internal-review.googlesource.com/162081

Change-Id: I91bf1baa726803b2a0073ff3db94e69719d377bb

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Add custom mutator to oemcrypto_generic_verify_fuzz

[ Merge of http://go/wvgerrit/161578 ]

Enable fuzzing mutations beyond changing the signature length.

Merged from https://widevine-internal-review.googlesource.com/159917

Change-Id: I022d752107b788bd45aafb8325e3186ef90336de

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Refactor oemcrypto_decrypt_cenc_fuzz

[ Merge of http://go/wvgerrit/161546 ]

Refactor to minimize the required corpus length, fuzz the sample input
data, and avoid undefined behavior related to filling
OEMCrypto_DestBufferDesc::buffer with fuzzed data.

Merged from https://widevine-internal-review.googlesource.com/159618

Change-Id: Id9af8b1704d4619ba88ab8de3adb35d5f8bb69f6

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Refactor oemcrypto_copy_buffer_fuzz

[ Merge of http://go/wvgerrit/161307 ]

Refactor to minimize the required corpus length, fuzz the output buffer
length, and avoid undefined behavior related to filling
OEMCrypto_DestBufferDesc::buffer with fuzzed data.

Merged from https://widevine-internal-review.googlesource.com/159617

Change-Id: Ieddc6260e5eca641f8409a9b361ca4e5a40d6f52

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Improve AddressSanitizer coverage for LoadEntitledContentKeys fuzzing

[ Merge of http://go/wvgerrit/161397 ]

Split fuzzed message into separate buffer so AddressSanitizer can detect
out-of-bounds accesses.

Merged from https://widevine-internal-review.googlesource.com/161277

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Avoid copying fuzzed data when separator splitting

[ Merge of http://go/wvgerrit/161120 ]

Merged from https://widevine-internal-review.googlesource.com/159497

Change-Id: I2b13ff34eee74c8aea9a8176aa711e3e2bc57add

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Fix oemcrypto_opk_dispatcher_fuzz

[ Merge of http://go/wvgerrit/161119 ]

Set ODK_Message size and add timestamp field to initialization requests.

Merged from https://widevine-internal-review.googlesource.com/159897

Change-Id: Ide51d1cb4119a396212d1802411cfa19f5792e9d

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Cover empty buffers in fuzz tests

[ Merge of http://go/wvgerrit/161018 ]

Update tests that avoid passing empty buffers to OEMCrypto API methods.

Merged from https://widevine-internal-review.googlesource.com/159317

Change-Id: If0d8007e3294820654b081fe813a09485e757f1c

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Fix cherry pick of "Improve buffer size distribution in fuzz tests"

[ Merge of http://go/wvgerrit/161022 ]

Change-Id: I8b0440fe13b513396b5779c25e6a46ac40eaa183

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Improve buffer size distribution in fuzz tests

[ Merge of http://go/wvgerrit/160957 ]

When a buffer size is fuzzed, use the modulo operation, instead of
std::min, to create an even distribution.

Merged from https://widevine-internal-review.googlesource.com/159157

Change-Id: I3c1168c7a7d739793005927a97af18de5df2e4c6

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Improve AddressSanitizer coverage in fuzz tests

[ Merge of http://go/wvgerrit/160464 ]

Split fuzzed data into separate buffers so AddressSanitizer can detect
all out-of-bounds accesses.

Merged from https://widevine-internal-review.googlesource.com/158977

Change-Id: I7ca67409b7c6f96548e21ab41f6caf99f738605d
This commit is contained in:
Rahul Frias
2023-02-27 16:20:51 -08:00
parent 469c6408da
commit e4cde22826
17 changed files with 505 additions and 433 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
libwvdrmengine/oemcrypto/test/fuzz_tests/oemcrypto_fuzz_helper.cc
View File

@@ -6,19 +6,18 @@
namespace wvoec {
void RedirectStdoutToFile() { freopen("log.txt", "a", stdout); }
std::vector<std::vector<uint8_t>> SplitInput(const uint8_t* data, size_t size) {
std::vector<std::vector<uint8_t>> result;
auto current_pos = data;
auto end = data + size;
// Using memmem to find separator
while (const uint8_t* pos = reinterpret_cast<const uint8_t*>(
memmem(current_pos, end - current_pos, kFuzzDataSeparator,
sizeof(kFuzzDataSeparator)))) {
result.push_back({current_pos, pos});
current_pos = pos + sizeof(kFuzzDataSeparator);
std::vector<FuzzedData> SplitFuzzedData(const uint8_t* data, size_t size) {
std::vector<FuzzedData> result;
const uint8_t* const end = data + size;
// Using memmem to find separator.
while (
const uint8_t* const separator = reinterpret_cast<const uint8_t*>(memmem(
data, end - data, kFuzzDataSeparator, sizeof(kFuzzDataSeparator)))) {
result.push_back({data, static_cast<size_t>(separator - data)});
data = separator + sizeof(kFuzzDataSeparator);
}
if (current_pos < end) {
result.push_back({current_pos, end});
if (data < end) {
result.push_back({data, static_cast<size_t>(end - data)});
}
return result;
}