bsd/netinet6/ah.h

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * RFC1826/2402 authentication header.
  32  */
  33
  34 #ifndef _NETINET6_AH_H_
  35 #define _NETINET6_AH_H_
  36
  37 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
  38 #if defined(_KERNEL) && !defined(_LKM)
  39 #include "opt_inet.h"
  40 #endif
  41 #endif
  42
  43 #include <netkey/keydb.h>               /* for struct secasvar */
  44
  45 struct ah {
  46         u_int8_t        ah_nxt;         /* Next Header */
  47         u_int8_t        ah_len;         /* Length of data, in 32bit */
  48         u_int16_t       ah_reserve;     /* Reserved for future use */
  49         u_int32_t       ah_spi;         /* Security parameter index */
  50         /* variable size, 32bit bound*/ /* Authentication data */
  51 };
  52
  53 struct newah {
  54         u_int8_t        ah_nxt;         /* Next Header */
  55         u_int8_t        ah_len;         /* Length of data + 1, in 32bit */
  56         u_int16_t       ah_reserve;     /* Reserved for future use */
  57         u_int32_t       ah_spi;         /* Security parameter index */
  58         u_int32_t       ah_seq;         /* Sequence number field */
  59         /* variable size, 32bit bound*/ /* Authentication data */
  60 };
  61
  62 struct ah_algorithm_state {
  63         struct secasvar *sav;
  64         void* foo;      /*per algorithm data - maybe*/
  65 };
  66
  67 struct ah_algorithm {
  68         int (*sumsiz) __P((struct secasvar *));
  69         int (*mature) __P((struct secasvar *));
  70         int keymin;     /* in bits */
  71         int keymax;     /* in bits */
  72         void (*init) __P((struct ah_algorithm_state *, struct secasvar *));
  73         void (*update) __P((struct ah_algorithm_state *, caddr_t, size_t));
  74         void (*result) __P((struct ah_algorithm_state *, caddr_t));
  75 };
  76
  77 #define AH_MAXSUMSIZE   16
  78
  79 #ifdef KERNEL
  80 extern struct ah_algorithm ah_algorithms[];
  81
  82 struct inpcb;
  83 #if INET6
  84 struct in6pcb;
  85 #endif
  86
  87 /* cksum routines */
  88 extern int ah_hdrlen __P((struct secasvar *));
  89
  90 extern size_t ah_hdrsiz __P((struct ipsecrequest *));
  91 extern void ah4_input __P((struct mbuf *, int));
  92 extern int ah4_output __P((struct mbuf *, struct ipsecrequest *));
  93 extern int ah4_calccksum __P((struct mbuf *, caddr_t,
  94                                 struct ah_algorithm *, struct secasvar *));
  95
  96 #if INET6
  97 extern int ah6_input __P((struct mbuf **, int *, int));
  98 extern int ah6_output __P((struct mbuf *, u_char *, struct mbuf *,
  99         struct ipsecrequest *));
 100 extern int ah6_calccksum __P((struct mbuf *, caddr_t,
 101                               struct ah_algorithm *, struct secasvar *));
 102 #endif /* INET6 */
 103
 104 #endif /*KERNEL*/
 105
 106 #endif /*_NETINET6_AH_H_*/