Add a fuzz target to test DNG image parsing in dng_sdk. am: 0c2c0ca07a am: 49be9325f2 am: f4e068b00e am: a139e98c85

Original change: https://android-review.googlesource.com/c/platform/external/dng_sdk/+/1487679

Change-Id: I46c50dbe7f3126cc5c524b65bfd30689bc1c8e1f

1 files changed, 36 insertions, 0 deletions

diff --git a/fuzzer/dng_parser_fuzzer.cpp b/fuzzer/dng_parser_fuzzer.cpp
new file mode 100644
index 0000000..84db0f3
--- /dev/null
+++ b/fuzzer/dng_parser_fuzzer.cpp
@@ -0,0 +1,36 @@
+#include <stddef.h>
+#include <stdint.h>
+
+#include "dng_exceptions.h"
+#include "dng_host.h"
+#include "dng_info.h"
+#include "dng_memory_stream.h"
+#include "dng_negative.h"
+
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  dng_host host;
+  dng_memory_stream stream(host.Allocator());
+
+  stream.Put(data, size);
+  stream.SetReadPosition(0);
+
+  std::unique_ptr<dng_negative> negative(host.Make_dng_negative());
+
+  try {
+    dng_info info;
+    info.Parse(host, stream);
+    info.PostParse(host);
+
+    if (info.IsValidDNG()) {
+      negative->Parse(host, stream, info);
+      negative->PostParse(host, stream, info);
+      negative->ReadStage1Image(host, stream, info);
+    }
+  } catch (dng_exception &e) {
+    // dng_sdk throws C++ exceptions on errors
+    // catch them here to prevent libFuzzer from crashing.
+  }
+
+  return 0;
+}