1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <stddef.h> 6 #include <stdint.h> 7 #include <cassert> 8 #include <vector> 9 10 #include "third_party/zlib/zlib.h" 11 12 static Bytef buffer[256 * 1024] = {0}; 13 14 // Entry point for LibFuzzer. LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)15extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { 16 // We need to strip the 'const' for zlib. 17 std::vector<unsigned char> input_buffer{data, data + size}; 18 19 uLongf buffer_length = static_cast<uLongf>(sizeof(buffer)); 20 21 z_stream stream; 22 stream.next_in = input_buffer.data(); 23 stream.avail_in = size; 24 stream.total_in = size; 25 stream.next_out = buffer; 26 stream.avail_out = buffer_length; 27 stream.total_out = buffer_length; 28 stream.zalloc = Z_NULL; 29 stream.zfree = Z_NULL; 30 31 if (Z_OK != deflateInit(&stream, Z_DEFAULT_COMPRESSION)) { 32 deflateEnd(&stream); 33 assert(false); 34 } 35 36 auto deflate_set_dictionary_result = 37 deflateSetDictionary(&stream, data, size); 38 deflateEnd(&stream); 39 if (Z_OK != deflate_set_dictionary_result) 40 assert(false); 41 42 return 0; 43 } 44