[libpng-proto] extend the example proto fuzz target with explicit support for iCCP PNG chunk

2 files changed, 14 insertions, 0 deletions

diff --git a/projects/libpng-proto/png_fuzz_proto.proto b/projects/libpng-proto/png_fuzz_proto.proto
index d978978f7..ca9a18e3b 100644
--- a/projects/libpng-proto/png_fuzz_proto.proto
+++ b/projects/libpng-proto/png_fuzz_proto.proto
@@ -17,6 +17,11 @@ message IDAT {
   required bytes data = 1;
 }
 
+message iCCP  {
+  required string name = 1;
+  required bytes data = 2;
+}
+
 message OtherChunk {
   oneof type {
     uint32 known_type = 1;
@@ -29,6 +34,7 @@ message PngChunk {
   oneof chunk {
     PLTE plte = 1;
     IDAT idat = 2;
+    iCCP iccp = 3;
     OtherChunk other_chunk = 10000;
   }
 }
diff --git a/projects/libpng-proto/png_proto_fuzzer_example.cc b/projects/libpng-proto/png_proto_fuzzer_example.cc
index 66ee18a68..e2957f7c1 100644
--- a/projects/libpng-proto/png_proto_fuzzer_example.cc
+++ b/projects/libpng-proto/png_proto_fuzzer_example.cc
@@ -68,6 +68,14 @@ std::string ProtoToPng(const PngProto &png_proto) {
       WriteChunk(all, "PLTE", chunk.plte().data());
     } else if (chunk.has_idat()) {
       WriteChunk(all, "IDAT", chunk.idat().data(), true);
+    } else if (chunk.has_iccp()) {
+      std::stringstream iccp_str;
+      iccp_str << chunk.iccp().name();
+      WriteByte(iccp_str, 0);
+      WriteByte(iccp_str, 0);
+      auto compressed_data = Compress(chunk.iccp().data());
+      iccp_str.write(compressed_data.data(), compressed_data.size());
+      WriteChunk(all, "iCCP", iccp_str.str());
     } else if (chunk.has_other_chunk()) {
       auto &other_chunk = chunk.other_chunk();
       char type[5] = {0};