bsd/netinet6/esp.h

   1 /*      $FreeBSD: src/sys/netinet6/esp.h,v 1.2.2.2 2001/07/03 11:01:49 ume Exp $        */
   2 /*      $KAME: esp.h,v 1.16 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  * RFC1827/2406 Encapsulated Security Payload.
  35  */
  36
  37 #ifndef _NETINET6_ESP_H_
  38 #define _NETINET6_ESP_H_
  39 #include <sys/appleapiopts.h>
  40
  41
  42 struct esp {
  43         u_int32_t       esp_spi;        /* ESP */
  44         /*variable size, 32bit bound*/  /* Initialization Vector */
  45         /*variable size*/               /* Payload data */
  46         /*variable size*/               /* padding */
  47         /*8bit*/                        /* pad size */
  48         /*8bit*/                        /* next header */
  49         /*8bit*/                        /* next header */
  50         /*variable size, 32bit bound*/  /* Authentication data (new IPsec) */
  51 };
  52
  53 struct newesp {
  54         u_int32_t       esp_spi;        /* ESP */
  55         u_int32_t       esp_seq;        /* Sequence number */
  56         /*variable size*/               /* (IV and) Payload data */
  57         /*variable size*/               /* padding */
  58         /*8bit*/                        /* pad size */
  59         /*8bit*/                        /* next header */
  60         /*8bit*/                        /* next header */
  61         /*variable size, 32bit bound*/  /* Authentication data */
  62 };
  63
  64 struct esptail {
  65         u_int8_t        esp_padlen;     /* pad length */
  66         u_int8_t        esp_nxt;        /* Next header */
  67         /*variable size, 32bit bound*/  /* Authentication data (new IPsec)*/
  68 };
  69
  70 #ifdef KERNEL_PRIVATE
  71 struct secasvar;
  72
  73 struct esp_algorithm {
  74         size_t padbound;        /* pad boundary, in byte */
  75         int ivlenval;           /* iv length, in byte */
  76         int (*mature)(struct secasvar *);
  77         int keymin;     /* in bits */
  78         int keymax;     /* in bits */
  79         int (*schedlen)(const struct esp_algorithm *);
  80         const char *name;
  81         int (*ivlen)(const struct esp_algorithm *, struct secasvar *);
  82         int (*decrypt)(struct mbuf *, size_t,
  83                 struct secasvar *, const struct esp_algorithm *, int);
  84         int (*encrypt)(struct mbuf *, size_t, size_t,
  85                 struct secasvar *, const struct esp_algorithm *, int);
  86         /* not supposed to be called directly */
  87         int (*schedule)(const struct esp_algorithm *, struct secasvar *);
  88         int (*blockdecrypt)(const struct esp_algorithm *,
  89                 struct secasvar *, u_int8_t *, u_int8_t *);
  90         int (*blockencrypt)(const struct esp_algorithm *,
  91                 struct secasvar *, u_int8_t *, u_int8_t *);
  92 };
  93
  94 extern const struct esp_algorithm *esp_algorithm_lookup(int);
  95 extern int esp_max_ivlen(void);
  96
  97 /* crypt routines */
  98 extern int esp4_output(struct mbuf *, struct ipsecrequest *);
  99 extern void esp4_input(struct mbuf *, int off);
 100 extern size_t esp_hdrsiz(struct ipsecrequest *);
 101
 102 extern int esp_schedule(const struct esp_algorithm *, struct secasvar *);
 103 extern int esp_auth(struct mbuf *, size_t, size_t,
 104         struct secasvar *, u_char *);
 105 #endif /* KERNEL_PRIVATE */
 106
 107 #endif /* _NETINET6_ESP_H_ */