/* crc32.h
* Declaration of CRC-32 routine and table
*
- * $Id$
- *
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
- * Copied from README.developer
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * SPDX-License-Identifier: GPL-2.0-or-later
*/
-#ifndef __CRC32_H_
-#define __CRC32_H_
+#ifndef __CRC32_H__
+#define __CRC32_H__
+
+#include "ws_symbol_export.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
-#define CRC32C_PRELOAD 0xffffffff
+#define CRC32_CCITT_SEED 0xFFFFFFFF
+#define CRC32C_PRELOAD 0xffffffff
+#define CRC32_MPEG2_SEED 0xFFFFFFFF
/*
* Byte swap fix contributed by Dave Wysochanski <davidw@netapp.com>.
((crc32c_value & 0x0000ff00) << 8) | \
((crc32c_value & 0x000000ff) << 24))
-#define CRC32C(c,d) (c=(c>>8)^crc32c_table[(c^(d))&0xFF])
+/** Lookup the crc value in the crc32_ccitt_table
+ @param pos Position in the table. */
+WS_DLL_PUBLIC guint32 crc32_ccitt_table_lookup (guchar pos);
-extern const guint32 crc32c_table[256];
+/** Lookup the crc value in the crc32c_table
+ @param pos Position in the table. */
+WS_DLL_PUBLIC guint32 crc32c_table_lookup (guchar pos);
/** Compute CRC32C checksum of a buffer of data.
@param buf The buffer containing the data.
@param len The number of bytes to include in the computation.
@param crc The preload value for the CRC32C computation.
@return The CRC32C checksum. */
-extern guint32 crc32c_calculate(const void *buf, int len, guint32 crc);
+WS_DLL_PUBLIC guint32 crc32c_calculate(const void *buf, int len, guint32 crc);
-extern const guint32 crc32_ccitt_table[256];
+/** Compute CRC32C checksum of a buffer of data without swapping seed crc
+ or completed checksum
+ @param buf The buffer containing the data.
+ @param len The number of bytes to include in the computation.
+ @param crc The preload value for the CRC32C computation.
+ @return The CRC32C checksum. */
+WS_DLL_PUBLIC guint32 crc32c_calculate_no_swap(const void *buf, int len, guint32 crc);
/** Compute CRC32 CCITT checksum of a buffer of data.
@param buf The buffer containing the data.
@param len The number of bytes to include in the computation.
@return The CRC32 CCITT checksum. */
-extern guint32 crc32_ccitt(const guint8 *buf, guint len);
+WS_DLL_PUBLIC guint32 crc32_ccitt(const guint8 *buf, guint len);
/** Compute CRC32 CCITT checksum of a buffer of data. If computing the
* checksum over multiple buffers and you want to feed the partial CRC32
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32 CCITT checksum (using the given seed). */
-extern guint32 crc32_ccitt_seed(const guint8 *buf, guint len, guint32 seed);
-
-/** Compute CRC32 CCITT checksum of a tv buffer.
- @param tvb The tv buffer containing the data.
- @param len The number of bytes to include in the computation.
- @return The CRC32 CCITT checksum. */
-extern guint32 crc32_ccitt_tvb(tvbuff_t *tvb, guint len);
-
-/** Compute CRC32 CCITT checksum of a tv buffer.
- @param tvb The tv buffer containing the data.
- @param offset The offset into the tv buffer.
- @param len The number of bytes to include in the computation.
- @return The CRC32 CCITT checksum. */
-extern guint32 crc32_ccitt_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
-
-/** Compute CRC32 CCITT checksum of a tv buffer. If computing the
- * checksum over multiple tv buffers and you want to feed the partial CRC32
- * back in, remember to take the 1's complement of the partial CRC32 first.
- @param tvb The tv buffer containing the data.
- @param len The number of bytes to include in the computation.
- @param seed The seed to use.
- @return The CRC32 CCITT checksum (using the given seed). */
-extern guint32 crc32_ccitt_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed);
+WS_DLL_PUBLIC guint32 crc32_ccitt_seed(const guint8 *buf, guint len, guint32 seed);
-/** Compute CRC32 CCITT checksum of a tv buffer. If computing the
- * checksum over multiple tv buffers and you want to feed the partial CRC32
- * back in, remember to take the 1's complement of the partial CRC32 first.
- @param tvb The tv buffer containing the data.
- @param offset The offset into the tv buffer.
+/** Compute MPEG-2 CRC32 checksum of a buffer of data.
+ @param buf The buffer containing the data.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
- @return The CRC32 CCITT checksum (using the given seed). */
-extern guint32 crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset,
- guint len, guint32 seed);
+ @return The CRC32 MPEG-2 checksum (using the given seed). */
+WS_DLL_PUBLIC guint32 crc32_mpeg2_seed(const guint8 *buf, guint len, guint32 seed);
+
+/** Computes CRC32 checksum for the given data with the polynom 0x0AA725CF using
+ * precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC32 checksum for the buffer
+ */
+WS_DLL_PUBLIC guint32 crc32_0x0AA725CF_seed(const guint8 *buf, guint len, guint32 seed);
+
+/** Computes CRC32 checksum for the given data with the polynom 0x5D6DCB using
+ * precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC32 checksum for the buffer
+ */
+WS_DLL_PUBLIC guint32 crc32_0x5D6DCB_seed(const guint8 *buf, guint len, guint32 seed);
-/** Compute IEEE 802.x CRC32 checksum of a tv buffer.
- @param tvb The tv buffer containing the data.
- @param len The number of bytes to include in the computation.
- @return The IEEE 802.x CRC32 checksum. */
-extern guint32 crc32_802_tvb(tvbuff_t *tvb, guint len);
+WS_DLL_PUBLIC int Dot11DecryptWepDecrypt(
+ const guchar *seed,
+ const size_t seed_len,
+ guchar *cypher_text,
+ const size_t data_len);
#ifdef __cplusplus
}
git.samba.org / metze / wireshark / wip.git / blobdiff