Green Sky
67653bbe50
git-subtree-dir: external/libwebp/libwebp git-subtree-split: dd7364c3cefe0f5c0b3c18c3b1887d353f90fc1f
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////////
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#include "./fuzz_utils.h"
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#include "src/webp/demux.h"
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#include "src/webp/mux.h"
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int LLVMFuzzerTestOneInput(const uint8_t* const data, size_t size) {
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WebPData webp_data;
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WebPDataInit(&webp_data);
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webp_data.size = size;
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webp_data.bytes = data;
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// Extracted chunks and frames are not processed or decoded,
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// which is already covered extensively by the other fuzz targets.
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if (size & 1) {
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// Mux API
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WebPMux* mux = WebPMuxCreate(&webp_data, size & 2);
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if (!mux) return 0;
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WebPData chunk;
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WebPMuxGetChunk(mux, "EXIF", &chunk);
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WebPMuxGetChunk(mux, "ICCP", &chunk);
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WebPMuxGetChunk(mux, "FUZZ", &chunk); // unknown
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uint32_t flags;
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WebPMuxGetFeatures(mux, &flags);
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WebPMuxAnimParams params;
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WebPMuxGetAnimationParams(mux, ¶ms);
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WebPMuxError status;
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WebPMuxFrameInfo info;
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for (int i = 0; i < kFuzzFrameLimit; i++) {
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status = WebPMuxGetFrame(mux, i + 1, &info);
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if (status == WEBP_MUX_NOT_FOUND) {
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break;
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} else if (status == WEBP_MUX_OK) {
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WebPDataClear(&info.bitstream);
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}
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}
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WebPMuxDelete(mux);
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} else {
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// Demux API
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WebPDemuxer* demux;
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if (size & 2) {
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WebPDemuxState state;
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demux = WebPDemuxPartial(&webp_data, &state);
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if (state < WEBP_DEMUX_PARSED_HEADER) {
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WebPDemuxDelete(demux);
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return 0;
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}
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} else {
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demux = WebPDemux(&webp_data);
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if (!demux) return 0;
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}
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WebPChunkIterator chunk_iter;
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if (WebPDemuxGetChunk(demux, "EXIF", 1, &chunk_iter)) {
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WebPDemuxNextChunk(&chunk_iter);
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}
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WebPDemuxReleaseChunkIterator(&chunk_iter);
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if (WebPDemuxGetChunk(demux, "ICCP", 0, &chunk_iter)) { // 0 == last
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WebPDemuxPrevChunk(&chunk_iter);
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}
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WebPDemuxReleaseChunkIterator(&chunk_iter);
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// Skips FUZZ because the Demux API has no concept of (un)known chunks.
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WebPIterator iter;
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if (WebPDemuxGetFrame(demux, 1, &iter)) {
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for (int i = 1; i < kFuzzFrameLimit; i++) {
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if (!WebPDemuxNextFrame(&iter)) break;
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}
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}
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WebPDemuxReleaseIterator(&iter);
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WebPDemuxDelete(demux);
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}
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return 0;
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}
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