bsd/netkey/keydb.c

   1 /*
   2  * Copyright (c) 2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*      $KAME: keydb.c,v 1.61 2000/03/25 07:24:13 sumikawa Exp $        */
  30
  31 /*
  32  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  33  * All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. Neither the name of the project nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  */
  59
  60 #include <sys/types.h>
  61 #include <sys/socket.h>
  62 #include <sys/param.h>
  63 #include <sys/systm.h>
  64 #include <sys/kernel.h>
  65 #include <sys/malloc.h>
  66 #include <sys/errno.h>
  67 #include <sys/queue.h>
  68
  69 #include <net/if.h>
  70 #include <net/route.h>
  71
  72 #include <netinet/in.h>
  73
  74 #include <net/pfkeyv2.h>
  75 #include <netkey/keydb.h>
  76 #include <netinet6/ipsec.h>
  77
  78 #include <net/net_osdep.h>
  79
  80 extern lck_mtx_t  *sadb_mutex;
  81
  82 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
  83
  84 // static void keydb_delsecasvar(struct secasvar *); // not used
  85
  86 /*
  87  * secpolicy management
  88  */
  89 struct secpolicy *
  90 keydb_newsecpolicy(void)
  91 {
  92         struct secpolicy *p;
  93
  94         LCK_MTX_ASSERT(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
  95
  96         return (struct secpolicy *)_MALLOC(sizeof(*p), M_SECA,
  97                    M_WAITOK | M_ZERO);
  98 }
  99
 100 void
 101 keydb_delsecpolicy(struct secpolicy *p)
 102 {
 103         _FREE(p, M_SECA);
 104 }
 105
 106 /*
 107  * secashead management
 108  */
 109 struct secashead *
 110 keydb_newsecashead(void)
 111 {
 112         struct secashead *p;
 113         int i;
 114
 115         LCK_MTX_ASSERT(sadb_mutex, LCK_MTX_ASSERT_OWNED);
 116
 117         p = (struct secashead *)_MALLOC(sizeof(*p), M_SECA, M_NOWAIT | M_ZERO);
 118         if (!p) {
 119                 lck_mtx_unlock(sadb_mutex);
 120                 p = (struct secashead *)_MALLOC(sizeof(*p), M_SECA,
 121                     M_WAITOK | M_ZERO);
 122                 lck_mtx_lock(sadb_mutex);
 123         }
 124         if (!p) {
 125                 return p;
 126         }
 127         for (i = 0; i < sizeof(p->savtree) / sizeof(p->savtree[0]); i++) {
 128                 LIST_INIT(&p->savtree[i]);
 129         }
 130         return p;
 131 }
 132
 133 #if 0
 134 void
 135 keydb_delsecashead(p)
 136 struct secashead *p;
 137 {
 138         _FREE(p, M_SECA);
 139 }
 140
 141
 142
 143 /*
 144  * secasvar management (reference counted)
 145  */
 146 struct secasvar *
 147 keydb_newsecasvar()
 148 {
 149         struct secasvar *p;
 150
 151         LCK_MTX_ASSERT(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
 152
 153         p = (struct secasvar *)_MALLOC(sizeof(*p), M_SECA, M_WAITOK);
 154         if (!p) {
 155                 return p;
 156         }
 157         bzero(p, sizeof(*p));
 158         p->refcnt = 1;
 159         return p;
 160 }
 161
 162 void
 163 keydb_refsecasvar(p)
 164 struct secasvar *p;
 165 {
 166         LCK_MTX_ASSERT(sadb_mutex, LCK_MTX_ASSERT_OWNED);
 167
 168         p->refcnt++;
 169 }
 170
 171 void
 172 keydb_freesecasvar(p)
 173 struct secasvar *p;
 174 {
 175         LCK_MTX_ASSERT(sadb_mutex, LCK_MTX_ASSERT_OWNED);
 176
 177         p->refcnt--;
 178         /* negative refcnt will cause panic intentionally */
 179         if (p->refcnt <= 0) {
 180                 keydb_delsecasvar(p);
 181         }
 182 }
 183
 184 static void
 185 keydb_delsecasvar(p)
 186 struct secasvar *p;
 187 {
 188         if (p->refcnt) {
 189                 panic("keydb_delsecasvar called with refcnt != 0");
 190         }
 191
 192         _FREE(p, M_SECA);
 193 }
 194 #endif
 195
 196 /*
 197  * secreplay management
 198  */
 199 struct secreplay *
 200 keydb_newsecreplay(u_int8_t wsize)
 201 {
 202         struct secreplay *p;
 203
 204         LCK_MTX_ASSERT(sadb_mutex, LCK_MTX_ASSERT_OWNED);
 205
 206         p = (struct secreplay *)_MALLOC(sizeof(*p), M_SECA, M_NOWAIT | M_ZERO);
 207         if (!p) {
 208                 lck_mtx_unlock(sadb_mutex);
 209                 p = (struct secreplay *)_MALLOC(sizeof(*p), M_SECA,
 210                     M_WAITOK | M_ZERO);
 211                 lck_mtx_lock(sadb_mutex);
 212         }
 213         if (!p) {
 214                 return p;
 215         }
 216
 217         if (wsize != 0) {
 218                 p->bitmap = (caddr_t)_MALLOC(wsize, M_SECA, M_NOWAIT | M_ZERO);
 219                 if (!p->bitmap) {
 220                         lck_mtx_unlock(sadb_mutex);
 221                         p->bitmap = (caddr_t)_MALLOC(wsize, M_SECA,
 222                             M_WAITOK | M_ZERO);
 223                         lck_mtx_lock(sadb_mutex);
 224                         if (!p->bitmap) {
 225                                 _FREE(p, M_SECA);
 226                                 return NULL;
 227                         }
 228                 }
 229         }
 230         p->wsize = wsize;
 231         return p;
 232 }
 233
 234 void
 235 keydb_delsecreplay(struct secreplay *p)
 236 {
 237         if (p->bitmap) {
 238                 _FREE(p->bitmap, M_SECA);
 239         }
 240         _FREE(p, M_SECA);
 241 }
 242
 243 #if 0
 244 /*      NOT USED
 245  * secreg management
 246  */
 247 struct secreg *
 248 keydb_newsecreg()
 249 {
 250         struct secreg *p;
 251
 252         p = (struct secreg *)_MALLOC(sizeof(*p), M_SECA, M_WAITOK);
 253         if (p) {
 254                 bzero(p, sizeof(*p));
 255         }
 256         return p;
 257 }
 258
 259 void
 260 keydb_delsecreg(p)
 261 struct secreg *p;
 262 {
 263         _FREE(p, M_SECA);
 264 }
 265 #endif