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/***************************************************************************
* Copyright (c) 2009-2010 Open Information Security Foundation
* Copyright (c) 2010-2013 Qualys, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the Qualys, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
/**
* @file
* @author Ivan Ristic <ivanr@webkreator.com>
*/
#ifndef _HTP_DECOMPRESSORS_H
#define _HTP_DECOMPRESSORS_H
#ifdef __cplusplus
extern "C" {
#endif
#include <zlib.h>
#include "lzma/LzmaDec.h"
typedef struct htp_decompressor_gzip_t htp_decompressor_gzip_t;
typedef struct htp_decompressor_t htp_decompressor_t;
#define GZIP_BUF_SIZE 8192
#define DEFLATE_MAGIC_1 0x1f
#define DEFLATE_MAGIC_2 0x8b
struct htp_decompressor_t {
// no longer used
htp_status_t (*decompress)(htp_decompressor_t *, htp_tx_data_t *);
htp_status_t (*callback)(htp_tx_data_t *);
// no longer used
void (*destroy)(htp_decompressor_t *);
struct htp_decompressor_t *next;
struct timeval time_before;
int32_t time_spent;
uint32_t nb_callbacks;
uint8_t passthrough; /**< decompression failed, pass through raw data */
};
struct htp_decompressor_gzip_t {
htp_decompressor_t super;
#if 0
int initialized;
#endif
int zlib_initialized;
uint8_t restart; /**< deflate restarted to try rfc1950 instead of 1951 */
z_stream stream;
uint8_t header[LZMA_PROPS_SIZE + 8];
uint8_t header_len;
CLzmaDec state;
unsigned char *buffer;
unsigned long crc;
};
htp_decompressor_t *htp_gzip_decompressor_create(htp_connp_t *connp, enum htp_content_encoding_t format);
htp_status_t htp_gzip_decompressor_decompress(htp_decompressor_t *drec, htp_tx_data_t *d);
void htp_gzip_decompressor_destroy(htp_decompressor_t *drec);
#ifdef __cplusplus
}
#endif
#endif /* _HTP_DECOMPRESSORS_H */
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