The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/esp.h

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    1 /*      $FreeBSD$       */
    2 /*      $KAME: esp.h,v 1.19 2001/09/04 08:43:19 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 
   40 #if defined(_KERNEL) && !defined(_LKM)
   41 #include "opt_inet.h"
   42 #endif
   43 
   44 struct esp {
   45         u_int32_t       esp_spi;        /* ESP */
   46         /* variable size, 32bit bound */        /* Initialization Vector */
   47         /* variable size */             /* Payload data */
   48         /* variable size */             /* padding */
   49         /* 8bit */                      /* pad size */
   50         /* 8bit */                      /* next header */
   51         /* 8bit */                      /* next header */
   52         /* variable size, 32bit bound */ /* Authentication data (new IPsec) */
   53 };
   54 
   55 struct newesp {
   56         u_int32_t       esp_spi;        /* ESP */
   57         u_int32_t       esp_seq;        /* Sequence number */
   58         /* variable size */             /* (IV and) Payload data */
   59         /* variable size */             /* padding */
   60         /* 8bit */                      /* pad size */
   61         /* 8bit */                      /* next header */
   62         /* 8bit */                      /* next header */
   63         /* variable size, 32bit bound *//* Authentication data */
   64 };
   65 
   66 struct esptail {
   67         u_int8_t        esp_padlen;     /* pad length */
   68         u_int8_t        esp_nxt;        /* Next header */
   69         /* variable size, 32bit bound *//* Authentication data (new IPsec)*/
   70 };
   71 
   72 #ifdef _KERNEL
   73 struct secasvar;
   74 
   75 struct esp_algorithm {
   76         size_t padbound;        /* pad boundary, in byte */
   77         int ivlenval;           /* iv length, in byte */
   78         int (*mature) __P((struct secasvar *));
   79         int keymin;     /* in bits */
   80         int keymax;     /* in bits */
   81         int (*schedlen) __P((const struct esp_algorithm *));
   82         const char *name;
   83         int (*ivlen) __P((const struct esp_algorithm *, struct secasvar *));
   84         int (*decrypt) __P((struct mbuf *, size_t,
   85                 struct secasvar *, const struct esp_algorithm *, int));
   86         int (*encrypt) __P((struct mbuf *, size_t, size_t,
   87                 struct secasvar *, const struct esp_algorithm *, int));
   88         /* not supposed to be called directly */
   89         int (*schedule) __P((const struct esp_algorithm *, struct secasvar *));
   90         int (*blockdecrypt) __P((const struct esp_algorithm *,
   91                 struct secasvar *, u_int8_t *, u_int8_t *));
   92         int (*blockencrypt) __P((const struct esp_algorithm *,
   93                 struct secasvar *, u_int8_t *, u_int8_t *));
   94 };
   95 
   96 extern const struct esp_algorithm *esp_algorithm_lookup __P((int));
   97 extern int esp_max_ivlen __P((void));
   98 
   99 /* crypt routines */
  100 extern int esp4_output __P((struct mbuf *, struct ipsecrequest *));
  101 extern void esp4_input __P((struct mbuf *, ...));
  102 extern size_t esp_hdrsiz __P((struct ipsecrequest *));
  103 
  104 extern int esp_schedule __P((const struct esp_algorithm *, struct secasvar *));
  105 extern int esp_auth __P((struct mbuf *, size_t, size_t,
  106         struct secasvar *, u_char *));
  107 #endif /* _KERNEL */
  108 
  109 #endif /* _NETINET6_ESP_H_ */

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