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/*
# 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;
}
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