bsd/netkey/keydb.h

   1 /*      $KAME: keydb.h,v 1.9 2000/02/22 14:06:41 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 #ifndef _NETKEY_KEYDB_H_
  33 #define _NETKEY_KEYDB_H_
  34 #include <sys/appleapiopts.h>
  35
  36 #ifdef BSD_KERNEL_PRIVATE
  37
  38 #include <netkey/key_var.h>
  39 #include <net/if_utun.h>
  40
  41 /* Security Assocciation Index */
  42 /* NOTE: Ensure to be same address family */
  43 struct secasindex {
  44         struct sockaddr_storage src;    /* srouce address for SA */
  45         struct sockaddr_storage dst;    /* destination address for SA */
  46         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
  47         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
  48         u_int32_t reqid;                /* reqid id who owned this SA */
  49                                         /* see IPSEC_MANUAL_REQID_MAX. */
  50 };
  51
  52 /* Security Association Data Base */
  53 struct secashead {
  54         LIST_ENTRY(secashead) chain;
  55
  56         struct secasindex saidx;
  57
  58         struct sadb_ident *idents;      /* source identity */
  59         struct sadb_ident *identd;      /* destination identity */
  60                                         /* XXX I don't know how to use them. */
  61
  62         u_int8_t dir;                   /* IPSEC_DIR_INBOUND or IPSEC_DIR_OUTBOUND */
  63         u_int8_t state;                 /* MATURE or DEAD. */
  64         LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];
  65                                         /* SA chain */
  66                                         /* The first of this list is newer SA */
  67
  68         struct route sa_route;          /* route cache */
  69 };
  70
  71 typedef int (*utun_is_keepalive_func) __P((void *, void *, u_int16_t, u_int32_t, size_t));
  72 typedef int (*utun_input_func) __P((void *, void *, protocol_family_t family));
  73
  74 /* Security Association */
  75 struct secasvar {
  76         LIST_ENTRY(secasvar) chain;
  77         LIST_ENTRY(secasvar) spihash;
  78         int refcnt;                     /* reference count */
  79         u_int8_t state;                 /* Status of this Association */
  80
  81         u_int8_t alg_auth;              /* Authentication Algorithm Identifier*/
  82         u_int8_t alg_enc;               /* Cipher Algorithm Identifier */
  83         u_int32_t spi;                  /* SPI Value, network byte order */
  84         u_int32_t flags;                /* holder for SADB_KEY_FLAGS */
  85
  86         struct sadb_key *key_auth;      /* Key for Authentication */
  87         struct sadb_key *key_enc;       /* Key for Encryption */
  88         caddr_t iv;                     /* Initilization Vector */
  89         u_int ivlen;                    /* length of IV */
  90         void *sched;                    /* intermediate encryption key */
  91         size_t schedlen;
  92
  93         struct secreplay *replay;       /* replay prevention */
  94         long created;                   /* for lifetime */
  95
  96         struct sadb_lifetime *lft_c;    /* CURRENT lifetime, it's constant. */
  97         struct sadb_lifetime *lft_h;    /* HARD lifetime */
  98         struct sadb_lifetime *lft_s;    /* SOFT lifetime */
  99
 100         u_int32_t seq;                  /* sequence number */
 101         pid_t pid;                      /* message's pid */
 102
 103         struct secashead *sah;          /* back pointer to the secashead */
 104
 105         /* Nat Traversal related bits */
 106         u_int32_t       natt_last_activity;
 107         u_int16_t       remote_ike_port;
 108         u_int16_t       natt_encapsulated_src_port;     /* network byte order */
 109
 110         u_int8_t        always_expire; /* Send expire/delete messages even if unused */
 111
 112         void              *utun_pcb;
 113         utun_is_keepalive_func    utun_is_keepalive_fn;
 114         utun_input_func    utun_in_fn;
 115 };
 116
 117 /* replay prevention */
 118 struct secreplay {
 119         u_int32_t count;
 120         u_int wsize;            /* window size, i.g. 4 bytes */
 121         u_int32_t seq;          /* used by sender */
 122         u_int32_t lastseq;      /* used by receiver */
 123         caddr_t bitmap;         /* used by receiver */
 124         int overflow;           /* overflow flag */
 125 };
 126
 127 /* socket table due to send PF_KEY messages. */
 128 struct secreg {
 129         LIST_ENTRY(secreg) chain;
 130
 131         struct socket *so;
 132 };
 133
 134 #ifndef IPSEC_NONBLOCK_ACQUIRE
 135 /* acquiring list table. */
 136 struct secacq {
 137         LIST_ENTRY(secacq) chain;
 138
 139         struct secasindex saidx;
 140
 141         u_int32_t seq;          /* sequence number */
 142         long created;           /* for lifetime */
 143         int count;              /* for lifetime */
 144 };
 145 #endif
 146
 147 /* Sensitivity Level Specification */
 148 /* nothing */
 149
 150 #define SADB_KILL_INTERVAL      600     /* six seconds */
 151
 152 struct key_cb {
 153         int key_count;
 154         int any_count;
 155 };
 156
 157 /* secpolicy */
 158 extern struct secpolicy *keydb_newsecpolicy(void);
 159 extern void keydb_delsecpolicy(struct secpolicy *);
 160 /* secashead */
 161 extern struct secashead *keydb_newsecashead(void);
 162 // extern void keydb_delsecashead(struct secashead *);  // not used
 163 /* secasvar */
 164 // extern struct secasvar *keydb_newsecasvar(void);             // not used
 165 // extern void keydb_refsecasvar(struct secasvar *);    // not used
 166 // extern void keydb_freesecasvar(struct secasvar *);   // not used
 167 /* secreplay */
 168 extern struct secreplay *keydb_newsecreplay(size_t);
 169 extern void keydb_delsecreplay(struct secreplay *);
 170 /* secreg */
 171 // extern struct secreg *keydb_newsecreg(void);                 // not used
 172 // extern void keydb_delsecreg(struct secreg *);                // not used
 173
 174 #endif /* BSD_KERNEL_PRIVATE */
 175
 176 #endif /* _NETKEY_KEYDB_H_ */