bsd/netinet6/esp.h

   1 /*      $KAME: esp.h,v 1.5 2000/02/22 14:04:15 itojun Exp $     */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * RFC1827/2406 Encapsulated Security Payload.
  34  */
  35
  36 #ifndef _NETINET6_ESP_H_
  37 #define _NETINET6_ESP_H_
  38
  39 #include <netkey/keydb.h>               /* for struct secas */
  40
  41 struct esp {
  42         u_int32_t       esp_spi;        /* ESP */
  43         /*variable size, 32bit bound*/  /* Initialization Vector */
  44         /*variable size*/               /* Payload data */
  45         /*variable size*/               /* padding */
  46         /*8bit*/                        /* pad size */
  47         /*8bit*/                        /* next header */
  48         /*8bit*/                        /* next header */
  49         /*variable size, 32bit bound*/  /* Authentication data (new IPsec) */
  50 };
  51
  52 struct newesp {
  53         u_int32_t       esp_spi;        /* ESP */
  54         u_int32_t       esp_seq;        /* Sequence number */
  55         /*variable size*/               /* (IV and) Payload data */
  56         /*variable size*/               /* padding */
  57         /*8bit*/                        /* pad size */
  58         /*8bit*/                        /* next header */
  59         /*8bit*/                        /* next header */
  60         /*variable size, 32bit bound*/  /* Authentication data */
  61 };
  62
  63 struct esptail {
  64         u_int8_t        esp_padlen;     /* pad length */
  65         u_int8_t        esp_nxt;        /* Next header */
  66         /*variable size, 32bit bound*/  /* Authentication data (new IPsec)*/
  67 };
  68
  69 struct esp_algorithm_state {
  70         struct secasvar *sav;
  71         void* foo;      /*per algorithm data - maybe*/
  72 };
  73
  74 /* XXX yet to be defined */
  75 struct esp_algorithm {
  76         size_t padbound;        /* pad boundary, in byte */
  77         int (*mature) __P((struct secasvar *));
  78         int keymin;     /* in bits */
  79         int keymax;     /* in bits */
  80         int (*ivlen) __P((struct secasvar *));
  81         int (*decrypt) __P((struct mbuf *, size_t,
  82                 struct secasvar *, struct esp_algorithm *, int));
  83         int (*encrypt) __P((struct mbuf *, size_t, size_t,
  84                 struct secasvar *, struct esp_algorithm *, int));
  85 };
  86
  87 #if KERNEL
  88 extern struct esp_algorithm esp_algorithms[];
  89
  90 /* crypt routines */
  91 extern int esp4_output __P((struct mbuf *, struct ipsecrequest *));
  92 extern void esp4_input __P((struct mbuf *, int off));
  93 extern size_t esp_hdrsiz __P((struct ipsecrequest *));
  94
  95 #if INET6
  96 extern int esp6_output __P((struct mbuf *, u_char *, struct mbuf *,
  97         struct ipsecrequest *));
  98 extern int esp6_input __P((struct mbuf **, int *, int));
  99 #endif /* INET6 */
 100 #endif /*KERNEL*/
 101
 102 struct secasvar;
 103 extern int esp_auth __P((struct mbuf *, size_t, size_t,
 104         struct secasvar *, u_char *));
 105
 106 #endif /*_NETINET6_ESP_H_*/