bsd/netinet6/ah.h

   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_ */