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jeremybenn |
/* $FreeBSD: src/sys/netinet6/esp.h,v 1.6 2002/04/19 04:46:22 suz Exp $ */
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/* $KAME: esp.h,v 1.19 2001/09/04 08:43:19 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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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
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* RFC1827/2406 Encapsulated Security Payload.
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*/
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#ifndef _NETINET6_ESP_H_
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#define _NETINET6_ESP_H_
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#if defined(_KERNEL) && !defined(_LKM)
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#include "opt_inet.h"
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#endif
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struct esp {
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u_int32_t esp_spi; /* ESP */
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/* variable size, 32bit bound */ /* Initialization Vector */
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/* variable size */ /* Payload data */
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/* variable size */ /* padding */
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/* 8bit */ /* pad size */
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/* 8bit */ /* next header */
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/* 8bit */ /* next header */
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/* variable size, 32bit bound */ /* Authentication data (new IPsec) */
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};
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struct newesp {
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u_int32_t esp_spi; /* ESP */
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u_int32_t esp_seq; /* Sequence number */
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/* variable size */ /* (IV and) Payload data */
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/* variable size */ /* padding */
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/* 8bit */ /* pad size */
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/* 8bit */ /* next header */
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/* 8bit */ /* next header */
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/* variable size, 32bit bound *//* Authentication data */
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};
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struct esptail {
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u_int8_t esp_padlen; /* pad length */
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u_int8_t esp_nxt; /* Next header */
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/* variable size, 32bit bound *//* Authentication data (new IPsec)*/
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};
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#ifdef _KERNEL
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struct secasvar;
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struct esp_algorithm {
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size_t padbound; /* pad boundary, in byte */
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int ivlenval; /* iv length, in byte */
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int (*mature) __P((struct secasvar *));
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int keymin; /* in bits */
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int keymax; /* in bits */
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int (*schedlen) __P((const struct esp_algorithm *));
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const char *name;
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int (*ivlen) __P((const struct esp_algorithm *, struct secasvar *));
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int (*decrypt) __P((struct mbuf *, size_t,
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struct secasvar *, const struct esp_algorithm *, int));
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int (*encrypt) __P((struct mbuf *, size_t, size_t,
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struct secasvar *, const struct esp_algorithm *, int));
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/* not supposed to be called directly */
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int (*schedule) __P((const struct esp_algorithm *, struct secasvar *));
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int (*blockdecrypt) __P((const struct esp_algorithm *,
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struct secasvar *, u_int8_t *, u_int8_t *));
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int (*blockencrypt) __P((const struct esp_algorithm *,
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struct secasvar *, u_int8_t *, u_int8_t *));
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};
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extern const struct esp_algorithm *esp_algorithm_lookup __P((int));
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extern int esp_max_ivlen __P((void));
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/* crypt routines */
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extern int esp4_output __P((struct mbuf *, struct ipsecrequest *));
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extern void esp4_input __P((struct mbuf *, int));
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extern size_t esp_hdrsiz __P((struct ipsecrequest *));
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extern int esp_schedule __P((const struct esp_algorithm *, struct secasvar *));
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extern int esp_auth __P((struct mbuf *, size_t, size_t,
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struct secasvar *, u_char *));
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#endif /* _KERNEL */
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#endif /* _NETINET6_ESP_H_ */
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