mirror of https://github.com/google/oss-fuzz.git
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
|
|
# Copyright 2018 Google Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
################################################################################
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <assert.h>
|
|
#include "lzo1b.h"
|
|
#include "lzo1c.h"
|
|
#include "lzo1f.h"
|
|
#include "lzo1x.h"
|
|
#include "lzo1y.h"
|
|
#include "lzo1z.h"
|
|
#include "lzo2a.h"
|
|
|
|
typedef int (*decompress_function)( const lzo_bytep, lzo_uint ,
|
|
lzo_bytep, lzo_uintp,
|
|
lzo_voidp );
|
|
|
|
#define NUM_DECOMP 7
|
|
|
|
static decompress_function funcArr[NUM_DECOMP] =
|
|
{
|
|
&lzo1b_decompress_safe,
|
|
&lzo1c_decompress_safe,
|
|
&lzo1f_decompress_safe,
|
|
&lzo1x_decompress_safe,
|
|
&lzo1y_decompress_safe,
|
|
&lzo1z_decompress_safe,
|
|
&lzo2a_decompress_safe
|
|
};
|
|
|
|
/* lzo (de)compresses data in blocks. Block size is the
|
|
* size of one such block. This size has a default value of 256KB.
|
|
*/
|
|
static const size_t bufSize = 256 * 1024L;
|
|
|
|
extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
|
|
{
|
|
int r;
|
|
lzo_uint new_len;
|
|
if (size < 1){
|
|
return 0;
|
|
}
|
|
/* Buffer into which compressed data provided by the fuzzer
|
|
* is going to be decompressed. The buffer size is chosen
|
|
* to be equal to the default block size (256KB) for
|
|
* (de)compression.
|
|
*/
|
|
unsigned char __LZO_MMODEL out[bufSize];
|
|
|
|
static bool isInit = false;
|
|
if (!isInit)
|
|
{
|
|
if (lzo_init() != LZO_E_OK)
|
|
{
|
|
#ifdef __DEBUG__
|
|
printf("internal error - lzo_init() failed !!!\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
isInit = true;
|
|
}
|
|
|
|
// Decompress.
|
|
int idx = size % NUM_DECOMP;
|
|
new_len = bufSize;
|
|
// Work memory not necessary for decompression
|
|
r = (*funcArr[idx])(data, size, out, &new_len, /*wrkmem=*/NULL);
|
|
#ifdef __DEBUG__
|
|
if (r != LZO_E_OK)
|
|
{
|
|
printf("error thrown by lzo1x_decompress_safe: %d\n", r);
|
|
}
|
|
printf("decompressed %lu bytes back into %lu bytes\n",
|
|
(unsigned long) size, (unsigned long) new_len);
|
|
#endif
|
|
return 0;
|
|
}
|