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Commit	Line	Data
	1	/* $FreeBSD: src/sys/netinet6/ah.h,v 1.3.2.2 2001/07/03 11:01:49 ume Exp $ */
	2	/* $KAME: ah.h,v 1.13 2000/10/18 21:28:00 itojun Exp $ */
	3
	4	/*
	5	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	6	* All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. Neither the name of the project nor the names of its contributors
	17	* may be used to endorse or promote products derived from this software
	18	* without specific prior written permission.
	19	*
	20	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	21	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	24	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	* SUCH DAMAGE.
	31	*/
	32
	33	/*
	34	* RFC1826/2402 authentication header.
	35	*/
	36
	37	#ifndef _NETINET6_AH_H_
	38	#define _NETINET6_AH_H_
	39	#include <sys/appleapiopts.h>
	40
	41	struct ah {
	42	u_int8_t ah_nxt; /* Next Header */
	43	u_int8_t ah_len; /* Length of data, in 32bit */
	44	u_int16_t ah_reserve; /* Reserved for future use */
	45	u_int32_t ah_spi; /* Security parameter index */
	46	/* variable size, 32bit bound/ / Authentication data */
	47	};
	48
	49	struct newah {
	50	u_int8_t ah_nxt; /* Next Header */
	51	u_int8_t ah_len; /* Length of data + 1, in 32bit */
	52	u_int16_t ah_reserve; /* Reserved for future use */
	53	u_int32_t ah_spi; /* Security parameter index */
	54	u_int32_t ah_seq; /* Sequence number field */
	55	/* variable size, 32bit bound/ / Authentication data */
	56	};
	57
	58	#ifdef BSD_KERNEL_PRIVATE
	59	struct secasvar;
	60
	61	struct ah_algorithm_state {
	62	struct secasvar *sav;
	63	void* foo; /per algorithm data - maybe/
	64	};
	65
	66	struct ah_algorithm {
	67	int (sumsiz)(struct secasvar );
	68	int (mature)(struct secasvar );
	69	int keymin; /* in bits */
	70	int keymax; /* in bits */
	71	const char *name;
	72	int (init)(struct ah_algorithm_state , struct secasvar *);
	73	void (update)(struct ah_algorithm_state , caddr_t, size_t);
	74	void (result)(struct ah_algorithm_state , caddr_t, size_t);
	75	};
	76
	77	#define AH_MAXSUMSIZE 64 // sha2-512's output size
	78
	79	extern const struct ah_algorithm *ah_algorithm_lookup(int);
	80
	81	/* cksum routines */
	82	extern int ah_hdrlen(struct secasvar *);
	83
	84	extern size_t ah_hdrsiz(struct ipsecrequest *);
	85	extern void ah4_input(struct mbuf *, int);
	86	extern int ah4_output(struct mbuf , struct secasvar );
	87	extern int ah4_calccksum(struct mbuf *, caddr_t, size_t,
	88	const struct ah_algorithm , struct secasvar );
	89	#endif /* BSD_KERNEL_PRIVATE */
	90
	91	#endif /* _NETINET6_AH_H_ */