mirror of
https://github.com/zlib-ng/minizip-ng
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116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/* zip_fuzzer.c - Zip fuzzer for libFuzzer
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Version 2.8.1, December 1, 2018
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part of the MiniZip project
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Copyright (C) 2018 The Chromium Authors
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Copyright (C) 2018 Anand K. Mistry
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Copyright (C) 2018 Nathan Moinvaziri
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https://github.com/nmoinvaz/minizip
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This program is distributed under the terms of the same license as zlib.
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See the accompanying LICENSE file for the full text of the license.
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*/
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#include "mz.h"
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#include "mz_strm.h"
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#include "mz_strm_mem.h"
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#include "mz_zip.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***************************************************************************/
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#define MZ_FUZZ_TEST_FILENAME "foo"
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/***************************************************************************/
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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mz_zip_file file_info;
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void *fuzz_stream = NULL;
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void *stream = NULL;
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void *handle = NULL;
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int32_t err = MZ_OK;
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uint16_t value16 = 0;
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uint8_t value8 = 0;
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int16_t compress_level = 0;
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int64_t fuzz_pos = 0;
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int32_t fuzz_length = 0;
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uint8_t *fuzz_buf = NULL;
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mz_stream_mem_create(&fuzz_stream);
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mz_stream_mem_set_buffer(fuzz_stream, (void *)data, size);
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memset(&file_info, 0, sizeof(file_info));
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file_info.flag = MZ_ZIP_FLAG_UTF8;
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if ((mz_stream_read_uint8(fuzz_stream, &value8) == MZ_OK) && (value8 < 0x08))
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{
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if (mz_stream_read_uint16(fuzz_stream, &value16) == MZ_OK)
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file_info.flag = value16;
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}
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file_info.compression_method = MZ_COMPRESS_METHOD_DEFLATE;
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if ((mz_stream_read_uint8(fuzz_stream, &value8) == MZ_OK) && (value8 < 0x08))
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{
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file_info.compression_method = MZ_COMPRESS_METHOD_STORE;
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}
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else if ((mz_stream_read_uint8(fuzz_stream, &value8) == MZ_OK) && (value8 < 0x08))
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{
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if (mz_stream_read_uint16(fuzz_stream, &value16) == MZ_OK)
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file_info.compression_method = value16;
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}
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if ((mz_stream_read_uint8(fuzz_stream, &value8) == MZ_OK) && (value8 < 0x08))
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{
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if (mz_stream_read_uint16(fuzz_stream, &value16) == MZ_OK)
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file_info.zip64 = value16;
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}
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file_info.filename = MZ_FUZZ_TEST_FILENAME;
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file_info.filename_size = (uint16_t)strlen(MZ_FUZZ_TEST_FILENAME);
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compress_level = MZ_COMPRESS_LEVEL_DEFAULT;
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if ((mz_stream_read_uint8(fuzz_stream, &value8) == MZ_OK) && (value8 < 0x08))
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{
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if (mz_stream_read_uint16(fuzz_stream, &value16) == MZ_OK)
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compress_level = value16;
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}
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mz_stream_mem_create(&stream);
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mz_zip_create(&handle);
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err = mz_zip_open(handle, stream, MZ_OPEN_MODE_CREATE | MZ_OPEN_MODE_WRITE);
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if (err == MZ_OK)
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{
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err = mz_zip_entry_write_open(handle, &file_info, compress_level, 0, NULL);
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if (err == MZ_OK)
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{
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mz_stream_mem_get_buffer_at_current(fuzz_stream, (const void **)&fuzz_buf);
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fuzz_pos = mz_stream_tell(fuzz_stream);
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mz_stream_mem_get_buffer_length(fuzz_stream, &fuzz_length);
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err = mz_zip_entry_write(handle, fuzz_buf, (fuzz_length - (int32_t)fuzz_pos));
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mz_zip_entry_close(handle);
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}
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mz_zip_close(handle);
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}
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mz_zip_delete(&handle);
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mz_stream_mem_delete(&stream);
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mz_stream_mem_delete(&fuzz_stream);
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return 0;
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}
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/***************************************************************************/
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#ifdef __cplusplus
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}
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#endif
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