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jeremybenn |
/* $FreeBSD: src/sys/netinet6/ah.h,v 1.7 2002/04/19 04:46:22 suz Exp $ */
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/* $KAME: ah.h,v 1.16 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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* RFC1826/2402 authentication header.
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*/
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#ifndef _NETINET6_AH_H_
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#define _NETINET6_AH_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 ah {
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u_int8_t ah_nxt; /* Next Header */
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u_int8_t ah_len; /* Length of data, in 32bit */
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u_int16_t ah_reserve; /* Reserved for future use */
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u_int32_t ah_spi; /* Security parameter index */
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/* variable size, 32bit bound*/ /* Authentication data */
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};
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struct newah {
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u_int8_t ah_nxt; /* Next Header */
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u_int8_t ah_len; /* Length of data + 1, in 32bit */
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u_int16_t ah_reserve; /* Reserved for future use */
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u_int32_t ah_spi; /* Security parameter index */
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u_int32_t ah_seq; /* Sequence number field */
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/* variable size, 32bit bound*/ /* Authentication data */
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};
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#ifdef _KERNEL
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struct secasvar;
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struct ah_algorithm_state {
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struct secasvar *sav;
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void* foo; /* per algorithm data - maybe */
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};
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struct ah_algorithm {
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int (*sumsiz) __P((struct secasvar *));
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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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const char *name;
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int (*init) __P((struct ah_algorithm_state *, struct secasvar *));
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void (*update) __P((struct ah_algorithm_state *, caddr_t, size_t));
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void (*result) __P((struct ah_algorithm_state *, caddr_t));
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};
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#define AH_MAXSUMSIZE 16
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extern const struct ah_algorithm *ah_algorithm_lookup __P((int));
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/* cksum routines */
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extern int ah_hdrlen __P((struct secasvar *));
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extern size_t ah_hdrsiz __P((struct ipsecrequest *));
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extern void ah4_input __P((struct mbuf *, int));
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extern int ah4_output __P((struct mbuf *, struct ipsecrequest *));
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extern int ah4_calccksum __P((struct mbuf *, caddr_t, size_t,
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const struct ah_algorithm *, struct secasvar *));
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#endif /* _KERNEL */
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#endif /* _NETINET6_AH_H_ */
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