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         for (i = 0; i < sizeof(p->savtree)/sizeof(p->savtree[0]); i++)
 127                 LIST_INIT(&p->savtree[i]);
 128         return p;
 129 }
 130
 131 #if 0
 132 void
 133 keydb_delsecashead(p)
 134         struct secashead *p;
 135 {
 136
 137         _FREE(p, M_SECA);
 138 }
 139
 140
 141
 142 /*
 143  * secasvar management (reference counted)
 144  */
 145 struct secasvar *
 146 keydb_newsecasvar()
 147 {
 148         struct secasvar *p;
 149
 150         lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
 151
 152         p = (struct secasvar *)_MALLOC(sizeof(*p), M_SECA, M_WAITOK);
 153         if (!p)
 154                 return p;
 155         bzero(p, sizeof(*p));
 156         p->refcnt = 1;
 157         return p;
 158 }
 159
 160 void
 161 keydb_refsecasvar(p)
 162         struct secasvar *p;
 163 {
 164
 165         lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
 166
 167         p->refcnt++;
 168 }
 169
 170 void
 171 keydb_freesecasvar(p)
 172         struct secasvar *p;
 173 {
 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 static void
 184 keydb_delsecasvar(p)
 185         struct secasvar *p;
 186 {
 187
 188         if (p->refcnt)
 189                 panic("keydb_delsecasvar called with refcnt != 0");
 190
 191         _FREE(p, M_SECA);
 192 }
 193 #endif
 194
 195 /*
 196  * secreplay management
 197  */
 198 struct secreplay *
 199 keydb_newsecreplay(size_t wsize)
 200 {
 201         struct secreplay *p;
 202
 203         lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
 204
 205         p = (struct secreplay *)_MALLOC(sizeof(*p), M_SECA, M_NOWAIT | M_ZERO);
 206         if (!p) {
 207                 lck_mtx_unlock(sadb_mutex);
 208                 p = (struct secreplay *)_MALLOC(sizeof(*p), M_SECA,
 209                     M_WAITOK | M_ZERO);
 210                 lck_mtx_lock(sadb_mutex);
 211         }
 212         if (!p)
 213                 return p;
 214
 215         if (wsize != 0) {
 216                 p->bitmap = (caddr_t)_MALLOC(wsize, M_SECA, M_NOWAIT | M_ZERO);
 217                 if (!p->bitmap) {
 218                         lck_mtx_unlock(sadb_mutex);
 219                         p->bitmap = (caddr_t)_MALLOC(wsize, M_SECA,
 220                             M_WAITOK | M_ZERO);
 221                         lck_mtx_lock(sadb_mutex);
 222                         if (!p->bitmap) {
 223                                 _FREE(p, M_SECA);
 224                                 return NULL;
 225                         }
 226                 }
 227         }
 228         p->wsize = wsize;
 229         return p;
 230 }
 231
 232 void
 233 keydb_delsecreplay(struct secreplay *p)
 234 {
 235         if (p->bitmap)
 236                 _FREE(p->bitmap, M_SECA);
 237         _FREE(p, M_SECA);
 238 }
 239
 240 #if 0
 241 /*      NOT USED
 242  * secreg management
 243  */
 244 struct secreg *
 245 keydb_newsecreg()
 246 {
 247         struct secreg *p;
 248
 249         p = (struct secreg *)_MALLOC(sizeof(*p), M_SECA, M_WAITOK);
 250         if (p)
 251                 bzero(p, sizeof(*p));
 252         return p;
 253 }
 254
 255 void
 256 keydb_delsecreg(p)
 257         struct secreg *p;
 258 {
 259
 260         _FREE(p, M_SECA);
 261 }
 262 #endif