80 lines
3.3 KiB
C
80 lines
3.3 KiB
C
/*
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* embedded IPsec
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* Copyright (c) 2003 Niklaus Schild and Christian Scheurer, HTI Biel/Bienne
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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*/
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/** @file esp.h
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* @brief Header for the Encapsulating Security Payload module
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*
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* @author Niklaus Schild <n.schild@gmx.ch>
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*
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* This document is part of <EM>embedded IPsec<BR>
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* Copyright (c) 2003 Niklaus Schild and Christian Scheurer, HTI Biel/Bienne<BR>
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* All rights reserved.<BR>
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* This file contains code from the OpenSSL Project<BR>
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* portions Copyright (c) 1998-2003 OpenSSL (www.openssl.org)
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*</EM><HR>
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*/
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#ifndef __IPSEC_ESP_H__
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#define __IPSEC_ESP_H__
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#include "ipsec_sa.h"
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#if LWIP_IPSEC
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#define IPSEC_ESP_IV_SIZE (8) /**< Defines the size (in bytes) of the Initialization Vector used by DES and 3DES */
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#define IPSEC_ESP_IV_SIZE_AES (16) /**< Defines the size (in bytes) of the Initialization Vector used by AES*/
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#define IPSEC_ESP_SPI_SIZE (4) /**< Defines the size (in bytes) of the SPI of an ESP packet */
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#define IPSEC_ESP_SEQ_SIZE (4) /**< Defines the size (in bytes) of the Sequence Number of an ESP packet */
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#define IPSEC_ESP_HDR_SIZE (IPSEC_ESP_SPI_SIZE+IPSEC_ESP_SEQ_SIZE) /**< Defines the size (in bytes) of the ESP header. Actually it defines just the size of the header which is located in */
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typedef struct ipsec_esp_header_struct
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{
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__u32 spi; /**< Security Parameters Index */
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__u32 sequence_number;/**< Sequence number */
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} ipsec_esp_header;
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typedef struct esp_packet_struct
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{
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__u32 spi ; /**< Security Parameters Index */
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__u32 sequence ; /**< Sequence number */
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__u8 data[1] ; /**< start of data, usually start of the IV */
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} esp_packet ;
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extern __u32 ipsec_esp_bitmap;
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extern __u32 ipsec_esp_lastSeq;
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ipsec_status ipsec_esp_decapsulate(ipsec_ip_header *packet, int *offset, int *len, sad_entry *sa) ;
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ipsec_status ipsec_esp_encapsulate(ipsec_ip_header *packet, int *offset, int *len, sad_entry *sa, __u32 src_addr, __u32 dest_addr) ;
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#endif
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#endif
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