/* $FreeBSD$ */
/* $KAME: ah.h,v 1.20 2003/08/05 12:21:15 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.
*/
/*
* RFC1826/2402 authentication header.
*/
#ifndef _NETINET6_AH_H_
#define _NETINET6_AH_H_
#if defined(_KERNEL) && !defined(_LKM)
#include "opt_inet.h"
#endif
struct ah {
u_int8_t ah_nxt; /* Next Header */
u_int8_t ah_len; /* Length of data, in 32bit */
u_int16_t ah_reserve; /* Reserved for future use */
u_int32_t ah_spi; /* Security parameter index */
/* variable size, 32bit bound*/ /* Authentication data */
};
struct newah {
u_int8_t ah_nxt; /* Next Header */
u_int8_t ah_len; /* Length of data + 1, in 32bit */
u_int16_t ah_reserve; /* Reserved for future use */
u_int32_t ah_spi; /* Security parameter index */
u_int32_t ah_seq; /* Sequence number field */
/* variable size, 32bit bound*/ /* Authentication data */
};
#ifdef _KERNEL
struct secasvar;
struct ah_algorithm_state {
struct secasvar *sav;
void* foo; /* per algorithm data - maybe */
};
struct ah_algorithm {
int (*sumsiz) __P((struct secasvar *));
int (*mature) __P((struct secasvar *));
int keymin; /* in bits */
int keymax; /* in bits */
const char *name;
int (*init) __P((struct ah_algorithm_state *, struct secasvar *));
void (*update) __P((struct ah_algorithm_state *, u_int8_t *, size_t));
void (*result) __P((struct ah_algorithm_state *, u_int8_t *, size_t));
};
#define AH_MAXSUMSIZE (512 / 8)
extern const struct ah_algorithm *ah_algorithm_lookup __P((int));
/* cksum routines */
extern int ah_hdrlen __P((struct secasvar *));
extern size_t ah_hdrsiz __P((struct ipsecrequest *));
extern void ah4_input __P((struct mbuf *, int));
extern int ah4_output __P((struct mbuf *, struct ipsecrequest *));
extern int ah4_calccksum __P((struct mbuf *, u_int8_t *, size_t,
const struct ah_algorithm *, struct secasvar *));
#endif /* _KERNEL */
#endif /* _NETINET6_AH_H_ */
