mirror of https://github.com/google/oss-fuzz.git
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
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/*
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# 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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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <assert.h>
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#include "lzo1b.h"
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#include "lzo1c.h"
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#include "lzo1f.h"
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#include "lzo1x.h"
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#include "lzo1y.h"
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#include "lzo1z.h"
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#include "lzo2a.h"
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typedef int (*decompress_function)( const lzo_bytep, lzo_uint ,
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lzo_bytep, lzo_uintp,
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lzo_voidp );
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#define NUM_DECOMP 7
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static decompress_function funcArr[NUM_DECOMP] =
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{
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&lzo1b_decompress_safe,
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&lzo1c_decompress_safe,
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&lzo1f_decompress_safe,
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&lzo1x_decompress_safe,
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&lzo1y_decompress_safe,
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&lzo1z_decompress_safe,
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&lzo2a_decompress_safe
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};
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/* lzo (de)compresses data in blocks. Block size is the
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* size of one such block. This size has a default value of 256KB.
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*/
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static const size_t bufSize = 256 * 1024L;
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extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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int r;
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lzo_uint new_len;
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if (size < 1){
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return 0;
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}
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/* Buffer into which compressed data provided by the fuzzer
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* is going to be decompressed. The buffer size is chosen
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* to be equal to the default block size (256KB) for
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* (de)compression.
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*/
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unsigned char __LZO_MMODEL out[bufSize];
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static bool isInit = false;
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if (!isInit)
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{
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if (lzo_init() != LZO_E_OK)
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{
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#ifdef __DEBUG__
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printf("internal error - lzo_init() failed !!!\n");
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#endif
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return 0;
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}
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isInit = true;
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}
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// Decompress.
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int idx = size % NUM_DECOMP;
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new_len = bufSize;
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// Work memory not necessary for decompression
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r = (*funcArr[idx])(data, size, out, &new_len, /*wrkmem=*/NULL);
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#ifdef __DEBUG__
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if (r != LZO_E_OK)
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{
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printf("error thrown by lzo1x_decompress_safe: %d\n", r);
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}
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printf("decompressed %lu bytes back into %lu bytes\n",
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(unsigned long) size, (unsigned long) new_len);
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#endif
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return 0;
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}
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