1 // Copyright 2019 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 #include <fuzzer/FuzzedDataProvider.h>
15
16 #include <string>
17
18 #include "deflate.h"
19 #include "zopfli.h"
20
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)21 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
22 ZopfliOptions options;
23 ZopfliInitOptions(&options);
24
25 FuzzedDataProvider stream(data, size);
26
27 // From documentation: valid values for btype are 0, 1, or 2.
28 const int btype = stream.PickValueInArray({0, 1, 2});
29 // The final parameter is an int but it is used as a bool.
30 const int is_final = stream.ConsumeIntegralInRange(0, 1);
31 const std::string input = stream.ConsumeRemainingBytesAsString();
32
33 unsigned char* out = nullptr;
34 size_t outsize = 0;
35 unsigned char bp = 0; // Apparently must be zero.
36 ZopfliDeflate(&options, btype, is_final,
37 reinterpret_cast<const unsigned char*>(input.data()),
38 input.size(), &bp, &out, &outsize);
39
40 if (out != nullptr) {
41 free(out);
42 }
43
44 return 0;
45 }
46