sys/netinet6/ah.h

   1 /*      $FreeBSD: src/sys/netinet6/ah.h,v 1.3.2.3 2002/04/28 05:40:26 suz Exp $ */
   2 /*      $DragonFly: src/sys/netinet6/ah.h,v 1.6 2006/05/20 04:42:12 dillon Exp $        */
   3 /*      $KAME: ah.h,v 1.16 2001/09/04 08:43:19 itojun Exp $     */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * RFC1826/2402 authentication header.
  36  */
  37
  38 #ifndef _NETINET6_AH_H_
  39 #define _NETINET6_AH_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44
  45 #if defined(_KERNEL) && !defined(_LKM)
  46 #include "opt_inet.h"
  47 #endif
  48
  49 struct ah {
  50         u_int8_t        ah_nxt;         /* Next Header */
  51         u_int8_t        ah_len;         /* Length of data, in 32bit */
  52         u_int16_t       ah_reserve;     /* Reserved for future use */
  53         u_int32_t       ah_spi;         /* Security parameter index */
  54         /* variable size, 32bit bound*/ /* Authentication data */
  55 };
  56
  57 struct newah {
  58         u_int8_t        ah_nxt;         /* Next Header */
  59         u_int8_t        ah_len;         /* Length of data + 1, in 32bit */
  60         u_int16_t       ah_reserve;     /* Reserved for future use */
  61         u_int32_t       ah_spi;         /* Security parameter index */
  62         u_int32_t       ah_seq;         /* Sequence number field */
  63         /* variable size, 32bit bound*/ /* Authentication data */
  64 };
  65
  66 #ifdef _KERNEL
  67
  68 struct secasvar;
  69 struct ipsecrequest;
  70 struct mbuf;
  71
  72 struct ah_algorithm_state {
  73         struct secasvar *sav;
  74         void* foo;      /* per algorithm data - maybe */
  75 };
  76
  77 struct ah_algorithm {
  78         int (*sumsiz) (struct secasvar *);
  79         int (*mature) (struct secasvar *);
  80         int keymin;     /* in bits */
  81         int keymax;     /* in bits */
  82         const char *name;
  83         int (*init) (struct ah_algorithm_state *, struct secasvar *);
  84         void (*update) (struct ah_algorithm_state *, caddr_t, size_t);
  85         void (*result) (struct ah_algorithm_state *, caddr_t);
  86 };
  87
  88 #define AH_MAXSUMSIZE   16
  89
  90 extern const struct ah_algorithm *ah_algorithm_lookup (int);
  91
  92 /* cksum routines */
  93 extern int ah_hdrlen (struct secasvar *);
  94
  95 extern size_t ah_hdrsiz (struct ipsecrequest *);
  96 extern void ah4_input (struct mbuf *, ...);
  97 extern int ah4_output (struct mbuf *, struct ipsecrequest *);
  98 extern int ah4_calccksum (struct mbuf *, caddr_t, size_t,
  99         const struct ah_algorithm *, struct secasvar *);
 100 #endif /* _KERNEL */
 101
 102 #endif /* _NETINET6_AH_H_ */