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

     /*      $NetBSD: esp.h,v 1.21 2003/07/20 03:24:03 itojun Exp $  */
     /*      $KAME: esp.h,v 1.19 2001/09/04 08:43:19 itojun Exp $    */
     
     /*
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * RFC1827/2406 Encapsulated Security Payload.
     */
    
    #ifndef _NETINET6_ESP_H_
    #define _NETINET6_ESP_H_
    
    #if defined(_KERNEL_OPT)
    #include "opt_inet.h"
    #endif
    
    struct esp {
            u_int32_t       esp_spi;        /* ESP */
            /* variable size, 32bit bound */        /* Initialization Vector */
            /* variable size */             /* Payload data */
            /* variable size */             /* padding */
            /* 8bit */                      /* pad size */
            /* 8bit */                      /* next header */
            /* variable size, 32bit bound */ /* Authentication data (new IPsec) */
    };
    
    struct newesp {
            u_int32_t       esp_spi;        /* ESP */
            u_int32_t       esp_seq;        /* Sequence number */
            /* variable size */             /* (IV and) Payload data */
            /* variable size */             /* padding */
            /* 8bit */                      /* pad size */
            /* 8bit */                      /* next header */
            /* variable size, 32bit bound *//* Authentication data */
    };
    
    struct esptail {
            u_int8_t        esp_padlen;     /* pad length */
            u_int8_t        esp_nxt;        /* Next header */
            /* variable size, 32bit bound *//* Authentication data (new IPsec)*/
    };
    
    #ifdef _KERNEL
    struct secasvar;
    
    struct esp_algorithm {
            size_t padbound;        /* pad boundary, in byte */
            int ivlenval;           /* iv length, in byte */
            int (*mature) __P((struct secasvar *));
            int keymin;     /* in bits */
            int keymax;     /* in bits */
            size_t (*schedlen) __P((const struct esp_algorithm *));
            const char *name;
            int (*ivlen) __P((const struct esp_algorithm *, struct secasvar *));
            int (*decrypt) __P((struct mbuf *, size_t,
                    struct secasvar *, const struct esp_algorithm *, int));
            int (*encrypt) __P((struct mbuf *, size_t, size_t,
                    struct secasvar *, const struct esp_algorithm *, int));
            /* not supposed to be called directly */
            int (*schedule) __P((const struct esp_algorithm *, struct secasvar *));
            int (*blockdecrypt) __P((const struct esp_algorithm *,
                    struct secasvar *, u_int8_t *, u_int8_t *));
            int (*blockencrypt) __P((const struct esp_algorithm *,
                    struct secasvar *, u_int8_t *, u_int8_t *));
    };
    
    extern const struct esp_algorithm *esp_algorithm_lookup __P((int));
    extern int esp_max_padbound __P((void));
    extern int esp_max_ivlen __P((void));
    
    /* crypt routines */
    extern int esp4_output __P((struct mbuf *, struct ipsecrequest *));
   extern void esp4_input __P((struct mbuf *, ...));
   extern size_t esp_hdrsiz __P((struct ipsecrequest *));
   
   extern void *esp4_ctlinput __P((int, struct sockaddr *, void *));
   
   #ifdef INET6
   extern int esp6_output __P((struct mbuf *, u_char *, struct mbuf *,
           struct ipsecrequest *));
   extern int esp6_input __P((struct mbuf **, int *, int));
   
   extern void esp6_ctlinput __P((int, struct sockaddr *, void *));
   #endif /* INET6 */
   
   extern int esp_schedule __P((const struct esp_algorithm *, struct secasvar *));
   extern int esp_auth __P((struct mbuf *, size_t, size_t,
           struct secasvar *, u_char *));
   #endif /* _KERNEL */
   
   #endif /* _NETINET6_ESP_H_ */

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