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/* $FreeBSD$ */
/* $KAME: esp.h,v 1.19 2001/09/04 08:43:19 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the project 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 PROJECT 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 PROJECT 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.
*/
/*
* RFC1827/2406 Encapsulated Security Payload.
*/
#ifndef _NETINET6_ESP_H_
#define _NETINET6_ESP_H_
#if defined(_KERNEL) && !defined(_LKM)
#include "opt_inet.h"
#endif
struct esp {
u_int32_t esp_spi; /* ESP */
/* variable size, 32bit bound */ /* Initialization Vector */
/* variable size */ /* Payload data */
/* variable size */ /* padding */
/* 8bit */ /* pad size */
/* 8bit */ /* next header */
/* 8bit */ /* next header */
/* variable size, 32bit bound */ /* Authentication data (new IPsec) */
};
struct newesp {
u_int32_t esp_spi; /* ESP */
u_int32_t esp_seq; /* Sequence number */
/* variable size */ /* (IV and) Payload data */
/* variable size */ /* padding */
/* 8bit */ /* pad size */
/* 8bit */ /* next header */
/* 8bit */ /* next header */
/* variable size, 32bit bound *//* Authentication data */
};
struct esptail {
u_int8_t esp_padlen; /* pad length */
u_int8_t esp_nxt; /* Next header */
/* variable size, 32bit bound *//* Authentication data (new IPsec)*/
};
#ifdef _KERNEL
struct secasvar;
struct esp_algorithm {
size_t padbound; /* pad boundary, in byte */
int ivlenval; /* iv length, in byte */
int (*mature) __P((struct secasvar *));
int keymin; /* in bits */
int keymax; /* in bits */
size_t (*schedlen) __P((const struct esp_algorithm *));
const char *name;
int (*ivlen) __P((const struct esp_algorithm *, struct secasvar *));
int (*decrypt) __P((struct mbuf *, size_t,
struct secasvar *, const struct esp_algorithm *, int));
int (*encrypt) __P((struct mbuf *, size_t, size_t,
struct secasvar *, const struct esp_algorithm *, int));
/* not supposed to be called directly */
int (*schedule) __P((const struct esp_algorithm *, struct secasvar *));
int (*blockdecrypt) __P((const struct esp_algorithm *,
struct secasvar *, u_int8_t *, u_int8_t *));
int (*blockencrypt) __P((const struct esp_algorithm *,
struct secasvar *, u_int8_t *, u_int8_t *));
};
extern const struct esp_algorithm *esp_algorithm_lookup __P((int));
extern int esp_max_ivlen __P((void));
/* crypt routines */
extern int esp4_output __P((struct mbuf *, struct ipsecrequest *));
extern void esp4_input __P((struct mbuf *, int));
extern size_t esp_hdrsiz __P((struct ipsecrequest *));
extern int esp_schedule __P((const struct esp_algorithm *, struct secasvar *));
extern int esp_auth __P((struct mbuf *, size_t, size_t,
struct secasvar *, u_char *));
#endif /* _KERNEL */
#endif /* _NETINET6_ESP_H_ */
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