third_party/exiv2
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Add printing and writing to fuzzer.

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This commit is contained in:
Kevin Backhouse 2021-07-12 10:56:04 +01:00
parent a3e4efe6b4
commit a7602639ea
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GPG Key ID: 9DD01852EE40366E
1 changed files with 12 additions and 6 deletions
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18
fuzz/fuzz-read-print-write.cpp
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@ -4,7 +4,7 @@
#include <iomanip>
#include <cassert>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t * Data, size_t Size) {
extern "C" int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size) {
// Invalid files generate a lot of warnings, so switch off logging.
Exiv2::LogMsg::setLevel(Exiv2::LogMsg::mute);
@ -12,15 +12,21 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t * Data, size_t Size) {
::atexit(Exiv2::XmpParser::terminate);
try {
Exiv2::Image::UniquePtr image = Exiv2::ImageFactory::open(Data, Size);
Exiv2::DataBuf data_copy(data, size);
Exiv2::Image::UniquePtr image =
Exiv2::ImageFactory::open(data_copy.pData_, size);
assert(image.get() != 0);
image->readMetadata();
image->exifData();
// Print to a std::ostringstream so that the fuzzer doesn't
// produce lots of garbage on stdout.
std::ostringstream buffer;
image->printStructure(buffer, Exiv2::kpsNone);
image->writeMetadata();
Exiv2::ExifData &exifData = image->exifData();
if (exifData.empty()) {
return -1;
}
} catch(...) {
// Exiv2 throws an exception if the metadata is invalid.
}