4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright (c) 2012 Nexenta Systems, Inc. All rights reserved.
25 * Copyright 2017 Joyent, Inc.
28 #include <sys/types.h>
29 #include <sys/stream.h>
30 #include <sys/stropts.h>
31 #include <sys/errno.h>
32 #include <sys/strlog.h>
33 #include <sys/tihdr.h>
34 #include <sys/socket.h>
36 #include <sys/sunddi.h>
37 #include <sys/mkdev.h>
40 #include <sys/sysmacros.h>
41 #include <sys/cmn_err.h>
42 #include <sys/vtrace.h>
43 #include <sys/debug.h>
44 #include <sys/atomic.h>
45 #include <sys/strsun.h>
46 #include <sys/random.h>
47 #include <netinet/in.h>
49 #include <netinet/ip6.h>
50 #include <netinet/icmp6.h>
51 #include <net/pfkeyv2.h>
52 #include <net/pfpolicy.h>
54 #include <inet/common.h>
59 #include <inet/ip_if.h>
60 #include <inet/ip_ndp.h>
61 #include <inet/ipsec_info.h>
62 #include <inet/ipsec_impl.h>
63 #include <inet/sadb.h>
64 #include <inet/ipsecah.h>
65 #include <inet/ipsec_impl.h>
66 #include <inet/ipdrop.h>
67 #include <sys/taskq.h>
68 #include <sys/policy.h>
69 #include <sys/strsun.h>
71 #include <sys/crypto/common.h>
72 #include <sys/crypto/api.h>
73 #include <sys/kstat.h>
74 #include <sys/strsubr.h>
76 #include <sys/tsol/tnet.h>
79 * Table of ND variables supported by ipsecah. These are loaded into
80 * ipsecah_g_nd in ipsecah_init_nd.
81 * All of these are alterable, within the min/max values given, at run time.
83 static ipsecahparam_t lcl_param_arr
[] = {
84 /* min max value name */
85 { 0, 3, 0, "ipsecah_debug"},
86 { 125, 32000, SADB_AGE_INTERVAL_DEFAULT
, "ipsecah_age_interval"},
87 { 1, 10, 1, "ipsecah_reap_delay"},
88 { 1, SADB_MAX_REPLAY
, 64, "ipsecah_replay_size"},
89 { 1, 300, 15, "ipsecah_acquire_timeout"},
90 { 1, 1800, 90, "ipsecah_larval_timeout"},
91 /* Default lifetime values for ACQUIRE messages. */
92 { 0, 0xffffffffU
, 0, "ipsecah_default_soft_bytes"},
93 { 0, 0xffffffffU
, 0, "ipsecah_default_hard_bytes"},
94 { 0, 0xffffffffU
, 24000, "ipsecah_default_soft_addtime"},
95 { 0, 0xffffffffU
, 28800, "ipsecah_default_hard_addtime"},
96 { 0, 0xffffffffU
, 0, "ipsecah_default_soft_usetime"},
97 { 0, 0xffffffffU
, 0, "ipsecah_default_hard_usetime"},
98 { 0, 1, 0, "ipsecah_log_unknown_spi"},
101 #define ah0dbg(a) printf a
102 /* NOTE: != 0 instead of > 0 so lint doesn't complain. */
103 #define ah1dbg(ahstack, a) if (ahstack->ipsecah_debug != 0) printf a
104 #define ah2dbg(ahstack, a) if (ahstack->ipsecah_debug > 1) printf a
105 #define ah3dbg(ahstack, a) if (ahstack->ipsecah_debug > 2) printf a
108 * XXX This is broken. Padding should be determined dynamically
109 * depending on the ICV size and IP version number so that the
110 * total AH header size is a multiple of 32 bits or 64 bits
111 * for V4 and V6 respectively. For 96bit ICVs we have no problems.
112 * Anything different from that, we need to fix our code.
114 #define IPV4_PADDING_ALIGN 0x04 /* Multiple of 32 bits */
115 #define IPV6_PADDING_ALIGN 0x04 /* Multiple of 32 bits */
118 * Helper macro. Avoids a call to msgdsize if there is only one
121 #define AH_MSGSIZE(mp) ((mp)->b_cont != NULL ? msgdsize(mp) : MBLKL(mp))
124 static mblk_t
*ah_auth_out_done(mblk_t
*, ip_xmit_attr_t
*, ipsec_crypto_t
*);
125 static mblk_t
*ah_auth_in_done(mblk_t
*, ip_recv_attr_t
*, ipsec_crypto_t
*);
126 static mblk_t
*ah_process_ip_options_v4(mblk_t
*, ipsa_t
*, int *, uint_t
,
127 boolean_t
, ipsecah_stack_t
*);
128 static mblk_t
*ah_process_ip_options_v6(mblk_t
*, ipsa_t
*, int *, uint_t
,
129 boolean_t
, ipsecah_stack_t
*);
130 static void ah_getspi(mblk_t
*, keysock_in_t
*, ipsecah_stack_t
*);
131 static void ah_inbound_restart(mblk_t
*, ip_recv_attr_t
*);
133 static mblk_t
*ah_outbound(mblk_t
*, ip_xmit_attr_t
*);
134 static void ah_outbound_finish(mblk_t
*, ip_xmit_attr_t
*);
136 static int ipsecah_open(queue_t
*, dev_t
*, int, int, cred_t
*);
137 static int ipsecah_close(queue_t
*);
138 static void ipsecah_wput(queue_t
*, mblk_t
*);
139 static boolean_t
ah_register_out(uint32_t, uint32_t, uint_t
, ipsecah_stack_t
*,
141 static void *ipsecah_stack_init(netstackid_t stackid
, netstack_t
*ns
);
142 static void ipsecah_stack_fini(netstackid_t stackid
, void *arg
);
144 /* Setable in /etc/system */
145 uint32_t ah_hash_size
= IPSEC_DEFAULT_HASH_SIZE
;
147 static taskq_t
*ah_taskq
;
149 static struct module_info info
= {
150 5136, "ipsecah", 0, INFPSZ
, 65536, 1024
153 static struct qinit rinit
= {
154 (pfi_t
)putnext
, NULL
, ipsecah_open
, ipsecah_close
, NULL
, &info
,
158 static struct qinit winit
= {
159 (pfi_t
)ipsecah_wput
, NULL
, ipsecah_open
, ipsecah_close
, NULL
, &info
,
163 struct streamtab ipsecahinfo
= {
164 &rinit
, &winit
, NULL
, NULL
167 static int ah_kstat_update(kstat_t
*, int);
169 uint64_t ipsacq_maxpackets
= IPSACQ_MAXPACKETS
;
172 ah_kstat_init(ipsecah_stack_t
*ahstack
, netstackid_t stackid
)
174 ipsec_stack_t
*ipss
= ahstack
->ipsecah_netstack
->netstack_ipsec
;
176 ahstack
->ah_ksp
= kstat_create_netstack("ipsecah", 0, "ah_stat", "net",
177 KSTAT_TYPE_NAMED
, sizeof (ah_kstats_t
) / sizeof (kstat_named_t
), 0,
180 if (ahstack
->ah_ksp
== NULL
|| ahstack
->ah_ksp
->ks_data
== NULL
)
183 ahstack
->ah_kstats
= ahstack
->ah_ksp
->ks_data
;
185 ahstack
->ah_ksp
->ks_update
= ah_kstat_update
;
186 ahstack
->ah_ksp
->ks_private
= (void *)(uintptr_t)stackid
;
188 #define K64 KSTAT_DATA_UINT64
189 #define KI(x) kstat_named_init(&(ahstack->ah_kstats->ah_stat_##x), #x, K64)
195 KI(replay_early_failures
);
198 KI(acquire_requests
);
208 kstat_install(ahstack
->ah_ksp
);
209 IP_ACQUIRE_STAT(ipss
, maxpackets
, ipsacq_maxpackets
);
214 ah_kstat_update(kstat_t
*kp
, int rw
)
217 netstackid_t stackid
= (netstackid_t
)(uintptr_t)kp
->ks_private
;
221 if ((kp
== NULL
) || (kp
->ks_data
== NULL
))
224 if (rw
== KSTAT_WRITE
)
227 ns
= netstack_find_by_stackid(stackid
);
230 ipss
= ns
->netstack_ipsec
;
235 ekp
= (ah_kstats_t
*)kp
->ks_data
;
237 rw_enter(&ipss
->ipsec_alg_lock
, RW_READER
);
238 ekp
->ah_stat_num_aalgs
.value
.ui64
= ipss
->ipsec_nalgs
[IPSEC_ALG_AUTH
];
239 rw_exit(&ipss
->ipsec_alg_lock
);
246 * Don't have to lock ipsec_age_interval, as only one thread will access it at
247 * a time, because I control the one function that does a qtimeout() on
253 ipsecah_stack_t
*ahstack
= (ipsecah_stack_t
*)arg
;
254 netstack_t
*ns
= ahstack
->ipsecah_netstack
;
255 hrtime_t begin
= gethrtime();
257 sadb_ager(&ahstack
->ah_sadb
.s_v4
, ahstack
->ah_pfkey_q
,
258 ahstack
->ipsecah_reap_delay
, ns
);
259 sadb_ager(&ahstack
->ah_sadb
.s_v6
, ahstack
->ah_pfkey_q
,
260 ahstack
->ipsecah_reap_delay
, ns
);
262 ahstack
->ah_event
= sadb_retimeout(begin
, ahstack
->ah_pfkey_q
,
264 &ahstack
->ipsecah_age_interval
, ahstack
->ipsecah_age_int_max
,
269 * Get an AH NDD parameter.
279 ipsecahparam_t
*ipsecahpa
= (ipsecahparam_t
*)cp
;
281 ipsecah_stack_t
*ahstack
= (ipsecah_stack_t
*)q
->q_ptr
;
283 mutex_enter(&ahstack
->ipsecah_param_lock
);
284 value
= ipsecahpa
->ipsecah_param_value
;
285 mutex_exit(&ahstack
->ipsecah_param_lock
);
287 (void) mi_mpprintf(mp
, "%u", value
);
292 * This routine sets an NDD variable in a ipsecahparam_t structure.
304 ipsecahparam_t
*ipsecahpa
= (ipsecahparam_t
*)cp
;
305 ipsecah_stack_t
*ahstack
= (ipsecah_stack_t
*)q
->q_ptr
;
308 * Fail the request if the new value does not lie within the
311 if (ddi_strtoul(value
, NULL
, 10, &new_value
) != 0 ||
312 new_value
< ipsecahpa
->ipsecah_param_min
||
313 new_value
> ipsecahpa
->ipsecah_param_max
) {
317 /* Set the new value */
318 mutex_enter(&ahstack
->ipsecah_param_lock
);
319 ipsecahpa
->ipsecah_param_value
= new_value
;
320 mutex_exit(&ahstack
->ipsecah_param_lock
);
325 * Using lifetime NDD variables, fill in an extended combination's
326 * lifetime information.
329 ipsecah_fill_defs(sadb_x_ecomb_t
*ecomb
, netstack_t
*ns
)
331 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
333 ecomb
->sadb_x_ecomb_soft_bytes
= ahstack
->ipsecah_default_soft_bytes
;
334 ecomb
->sadb_x_ecomb_hard_bytes
= ahstack
->ipsecah_default_hard_bytes
;
335 ecomb
->sadb_x_ecomb_soft_addtime
=
336 ahstack
->ipsecah_default_soft_addtime
;
337 ecomb
->sadb_x_ecomb_hard_addtime
=
338 ahstack
->ipsecah_default_hard_addtime
;
339 ecomb
->sadb_x_ecomb_soft_usetime
=
340 ahstack
->ipsecah_default_soft_usetime
;
341 ecomb
->sadb_x_ecomb_hard_usetime
=
342 ahstack
->ipsecah_default_hard_usetime
;
346 * Initialize things for AH at module load time.
349 ipsecah_ddi_init(void)
351 ah_taskq
= taskq_create("ah_taskq", 1, minclsyspri
,
352 IPSEC_TASKQ_MIN
, IPSEC_TASKQ_MAX
, 0);
355 * We want to be informed each time a stack is created or
356 * destroyed in the kernel, so we can maintain the
357 * set of ipsecah_stack_t's.
359 netstack_register(NS_IPSECAH
, ipsecah_stack_init
, NULL
,
366 * Walk through the param array specified registering each element with the
367 * named dispatch handler.
370 ipsecah_param_register(IDP
*ndp
, ipsecahparam_t
*ahp
, int cnt
)
372 for (; cnt
-- > 0; ahp
++) {
373 if (ahp
->ipsecah_param_name
!= NULL
&&
374 ahp
->ipsecah_param_name
[0]) {
376 ahp
->ipsecah_param_name
,
377 ipsecah_param_get
, ipsecah_param_set
,
388 * Initialize things for AH for each stack instance
391 ipsecah_stack_init(netstackid_t stackid
, netstack_t
*ns
)
393 ipsecah_stack_t
*ahstack
;
396 ahstack
= (ipsecah_stack_t
*)kmem_zalloc(sizeof (*ahstack
), KM_SLEEP
);
397 ahstack
->ipsecah_netstack
= ns
;
399 ahp
= (ipsecahparam_t
*)kmem_alloc(sizeof (lcl_param_arr
), KM_SLEEP
);
400 ahstack
->ipsecah_params
= ahp
;
401 bcopy(lcl_param_arr
, ahp
, sizeof (lcl_param_arr
));
403 (void) ipsecah_param_register(&ahstack
->ipsecah_g_nd
, ahp
,
404 A_CNT(lcl_param_arr
));
406 (void) ah_kstat_init(ahstack
, stackid
);
408 ahstack
->ah_sadb
.s_acquire_timeout
= &ahstack
->ipsecah_acquire_timeout
;
409 sadbp_init("AH", &ahstack
->ah_sadb
, SADB_SATYPE_AH
, ah_hash_size
,
410 ahstack
->ipsecah_netstack
);
412 mutex_init(&ahstack
->ipsecah_param_lock
, NULL
, MUTEX_DEFAULT
, 0);
414 ip_drop_register(&ahstack
->ah_dropper
, "IPsec AH");
419 * Destroy things for AH at module unload time.
422 ipsecah_ddi_destroy(void)
424 netstack_unregister(NS_IPSECAH
);
425 taskq_destroy(ah_taskq
);
429 * Destroy things for AH for one stack... Never called?
432 ipsecah_stack_fini(netstackid_t stackid
, void *arg
)
434 ipsecah_stack_t
*ahstack
= (ipsecah_stack_t
*)arg
;
436 if (ahstack
->ah_pfkey_q
!= NULL
) {
437 (void) quntimeout(ahstack
->ah_pfkey_q
, ahstack
->ah_event
);
439 ahstack
->ah_sadb
.s_acquire_timeout
= NULL
;
440 sadbp_destroy(&ahstack
->ah_sadb
, ahstack
->ipsecah_netstack
);
441 ip_drop_unregister(&ahstack
->ah_dropper
);
442 mutex_destroy(&ahstack
->ipsecah_param_lock
);
443 nd_free(&ahstack
->ipsecah_g_nd
);
445 kmem_free(ahstack
->ipsecah_params
, sizeof (lcl_param_arr
));
446 ahstack
->ipsecah_params
= NULL
;
447 kstat_delete_netstack(ahstack
->ah_ksp
, stackid
);
448 ahstack
->ah_ksp
= NULL
;
449 ahstack
->ah_kstats
= NULL
;
451 kmem_free(ahstack
, sizeof (*ahstack
));
455 * AH module open routine, which is here for keysock plumbing.
456 * Keysock is pushed over {AH,ESP} which is an artifact from the Bad Old
457 * Days of export control, and fears that ESP would not be allowed
458 * to be shipped at all by default. Eventually, keysock should
459 * either access AH and ESP via modstubs or krtld dependencies, or
460 * perhaps be folded in with AH and ESP into a single IPsec/netsec
461 * module ("netsec" if PF_KEY provides more than AH/ESP keying tables).
465 ipsecah_open(queue_t
*q
, dev_t
*devp
, int flag
, int sflag
, cred_t
*credp
)
468 ipsecah_stack_t
*ahstack
;
470 if (secpolicy_ip_config(credp
, B_FALSE
) != 0)
473 if (q
->q_ptr
!= NULL
)
474 return (0); /* Re-open of an already open instance. */
476 if (sflag
!= MODOPEN
)
479 ns
= netstack_find_by_cred(credp
);
481 ahstack
= ns
->netstack_ipsecah
;
482 ASSERT(ahstack
!= NULL
);
485 WR(q
)->q_ptr
= q
->q_ptr
;
492 * AH module close routine.
495 ipsecah_close(queue_t
*q
)
497 ipsecah_stack_t
*ahstack
= (ipsecah_stack_t
*)q
->q_ptr
;
500 * Clean up q_ptr, if needed.
504 /* Keysock queue check is safe, because of OCEXCL perimeter. */
506 if (q
== ahstack
->ah_pfkey_q
) {
508 ("ipsecah_close: Ummm... keysock is closing AH.\n"));
509 ahstack
->ah_pfkey_q
= NULL
;
510 /* Detach qtimeouts. */
511 (void) quntimeout(q
, ahstack
->ah_event
);
514 netstack_rele(ahstack
->ipsecah_netstack
);
519 * Construct an SADB_REGISTER message with the current algorithms.
522 ah_register_out(uint32_t sequence
, uint32_t pid
, uint_t serial
,
523 ipsecah_stack_t
*ahstack
, cred_t
*cr
)
526 boolean_t rc
= B_TRUE
;
528 sadb_supported_t
*sasupp
;
530 uint_t allocsize
= sizeof (*samsg
);
531 uint_t i
, numalgs_snap
;
532 ipsec_alginfo_t
**authalgs
;
534 ipsec_stack_t
*ipss
= ahstack
->ipsecah_netstack
->netstack_ipsec
;
538 ts_label_t
*sens_tsl
= NULL
;
540 /* Allocate the KEYSOCK_OUT. */
541 mp
= sadb_keysock_out(serial
);
543 ah0dbg(("ah_register_out: couldn't allocate mblk.\n"));
547 if (is_system_labeled() && (cr
!= NULL
)) {
548 sens_tsl
= crgetlabel(cr
);
549 if (sens_tsl
!= NULL
) {
550 sens_len
= sadb_sens_len_from_label(sens_tsl
);
551 allocsize
+= sens_len
;
556 * Allocate the PF_KEY message that follows KEYSOCK_OUT.
557 * The alg reader lock needs to be held while allocating
558 * the variable part (i.e. the algorithms) of the message.
561 rw_enter(&ipss
->ipsec_alg_lock
, RW_READER
);
564 * Return only valid algorithms, so the number of algorithms
565 * to send up may be less than the number of algorithm entries
568 authalgs
= ipss
->ipsec_alglists
[IPSEC_ALG_AUTH
];
569 for (num_aalgs
= 0, i
= 0; i
< IPSEC_MAX_ALGS
; i
++)
570 if (authalgs
[i
] != NULL
&& ALG_VALID(authalgs
[i
]))
574 * Fill SADB_REGISTER message's algorithm descriptors. Hold
575 * down the lock while filling it.
577 if (num_aalgs
!= 0) {
578 allocsize
+= (num_aalgs
* sizeof (*saalg
));
579 allocsize
+= sizeof (*sasupp
);
581 mp
->b_cont
= allocb(allocsize
, BPRI_HI
);
582 if (mp
->b_cont
== NULL
) {
583 rw_exit(&ipss
->ipsec_alg_lock
);
588 mp
->b_cont
->b_wptr
+= allocsize
;
589 nextext
= (sadb_ext_t
*)(mp
->b_cont
->b_rptr
+ sizeof (*samsg
));
591 if (num_aalgs
!= 0) {
593 saalg
= (sadb_alg_t
*)(((uint8_t *)nextext
) + sizeof (*sasupp
));
594 ASSERT(((ulong_t
)saalg
& 0x7) == 0);
598 ((i
< IPSEC_MAX_ALGS
) && (numalgs_snap
< num_aalgs
));
600 if (authalgs
[i
] == NULL
|| !ALG_VALID(authalgs
[i
]))
603 saalg
->sadb_alg_id
= authalgs
[i
]->alg_id
;
604 saalg
->sadb_alg_ivlen
= 0;
605 saalg
->sadb_alg_minbits
= authalgs
[i
]->alg_ef_minbits
;
606 saalg
->sadb_alg_maxbits
= authalgs
[i
]->alg_ef_maxbits
;
607 saalg
->sadb_x_alg_increment
=
608 authalgs
[i
]->alg_increment
;
609 /* For now, salt is meaningless in AH. */
610 ASSERT(authalgs
[i
]->alg_saltlen
== 0);
611 saalg
->sadb_x_alg_saltbits
=
612 SADB_8TO1(authalgs
[i
]->alg_saltlen
);
616 ASSERT(numalgs_snap
== num_aalgs
);
619 * Reality check to make sure I snagged all of the
622 for (; i
< IPSEC_MAX_ALGS
; i
++)
623 if (authalgs
[i
] != NULL
&& ALG_VALID(authalgs
[i
]))
625 "ah_register_out()! Missed #%d.\n", i
);
627 nextext
= (sadb_ext_t
*)saalg
;
630 rw_exit(&ipss
->ipsec_alg_lock
);
632 if (sens_tsl
!= NULL
) {
633 sens
= (sadb_sens_t
*)nextext
;
634 sadb_sens_from_label(sens
, SADB_EXT_SENSITIVITY
,
637 nextext
= (sadb_ext_t
*)(((uint8_t *)sens
) + sens_len
);
640 /* Now fill the restof the SADB_REGISTER message. */
642 samsg
= (sadb_msg_t
*)mp
->b_cont
->b_rptr
;
643 samsg
->sadb_msg_version
= PF_KEY_V2
;
644 samsg
->sadb_msg_type
= SADB_REGISTER
;
645 samsg
->sadb_msg_errno
= 0;
646 samsg
->sadb_msg_satype
= SADB_SATYPE_AH
;
647 samsg
->sadb_msg_len
= SADB_8TO64(allocsize
);
648 samsg
->sadb_msg_reserved
= 0;
650 * Assume caller has sufficient sequence/pid number info. If it's one
651 * from me over a new alg., I could give two hoots about sequence.
653 samsg
->sadb_msg_seq
= sequence
;
654 samsg
->sadb_msg_pid
= pid
;
656 if (num_aalgs
!= 0) {
657 sasupp
= (sadb_supported_t
*)(samsg
+ 1);
658 sasupp
->sadb_supported_len
= SADB_8TO64(
659 sizeof (*sasupp
) + sizeof (*saalg
) * num_aalgs
);
660 sasupp
->sadb_supported_exttype
= SADB_EXT_SUPPORTED_AUTH
;
661 sasupp
->sadb_supported_reserved
= 0;
664 if (ahstack
->ah_pfkey_q
!= NULL
)
665 putnext(ahstack
->ah_pfkey_q
, mp
);
675 * Invoked when the algorithm table changes. Causes SADB_REGISTER
676 * messages continaining the current list of algorithms to be
677 * sent up to the AH listeners.
680 ipsecah_algs_changed(netstack_t
*ns
)
682 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
685 * Time to send a PF_KEY SADB_REGISTER message to AH listeners
686 * everywhere. (The function itself checks for NULL ah_pfkey_q.)
688 (void) ah_register_out(0, 0, 0, ahstack
, NULL
);
692 * Stub function that taskq_dispatch() invokes to take the mblk (in arg)
693 * and send it into AH and IP again.
696 inbound_task(void *arg
)
698 mblk_t
*mp
= (mblk_t
*)arg
;
703 mp
= async_mp
->b_cont
;
704 async_mp
->b_cont
= NULL
;
705 if (!ip_recv_attr_from_mblk(async_mp
, &iras
)) {
706 /* The ill or ip_stack_t disappeared on us */
707 ip_drop_input("ip_recv_attr_from_mblk", mp
, NULL
);
712 ah_inbound_restart(mp
, &iras
);
714 ira_cleanup(&iras
, B_TRUE
);
718 * Restart ESP after the SA has been added.
721 ah_inbound_restart(mblk_t
*mp
, ip_recv_attr_t
*ira
)
725 ipsecah_stack_t
*ahstack
;
727 ns
= ira
->ira_ill
->ill_ipst
->ips_netstack
;
728 ahstack
= ns
->netstack_ipsecah
;
730 ASSERT(ahstack
!= NULL
);
731 mp
= ipsec_inbound_ah_sa(mp
, ira
, &ah
);
736 ASSERT(ira
->ira_flags
& IRAF_IPSEC_SECURE
);
737 ASSERT(ira
->ira_ipsec_ah_sa
!= NULL
);
739 mp
= ira
->ira_ipsec_ah_sa
->ipsa_input_func(mp
, ah
, ira
);
742 * Either it failed or is pending. In the former case
743 * ipIfStatsInDiscards was increased.
747 ip_input_post_ipsec(mp
, ira
);
751 * Now that weak-key passed, actually ADD the security association, and
752 * send back a reply ADD message.
755 ah_add_sa_finish(mblk_t
*mp
, sadb_msg_t
*samsg
, keysock_in_t
*ksi
,
756 int *diagnostic
, ipsecah_stack_t
*ahstack
)
758 isaf_t
*primary
= NULL
, *secondary
;
759 boolean_t clone
= B_FALSE
, is_inbound
= B_FALSE
;
760 sadb_sa_t
*assoc
= (sadb_sa_t
*)ksi
->ks_in_extv
[SADB_EXT_SA
];
764 mblk_t
*acq_msgs
= NULL
;
769 netstack_t
*ns
= ahstack
->ipsecah_netstack
;
770 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
773 * Locate the appropriate table(s).
776 sq
.spp
= &ahstack
->ah_sadb
;
777 error
= sadb_form_query(ksi
, IPSA_Q_SA
|IPSA_Q_DST
,
778 IPSA_Q_SA
|IPSA_Q_DST
|IPSA_Q_INBOUND
|IPSA_Q_OUTBOUND
,
784 * Use the direction flags provided by the KMD to determine
785 * if the inbound or outbound table should be the primary
786 * for this SA. If these flags were absent then make this
787 * decision based on the addresses.
789 if (assoc
->sadb_sa_flags
& IPSA_F_INBOUND
) {
790 primary
= sq
.inbound
;
791 secondary
= sq
.outbound
;
793 if (assoc
->sadb_sa_flags
& IPSA_F_OUTBOUND
)
796 if (assoc
->sadb_sa_flags
& IPSA_F_OUTBOUND
) {
797 primary
= sq
.outbound
;
798 secondary
= sq
.inbound
;
801 if (primary
== NULL
) {
803 * The KMD did not set a direction flag, determine which
804 * table to insert the SA into based on addresses.
806 switch (ksi
->ks_in_dsttype
) {
807 case KS_IN_ADDR_MBCAST
:
808 clone
= B_TRUE
; /* All mcast SAs can be bidirectional */
809 assoc
->sadb_sa_flags
|= IPSA_F_OUTBOUND
;
812 * If the source address is either one of mine, or unspecified
813 * (which is best summed up by saying "not 'not mine'"),
814 * then the association is potentially bi-directional,
815 * in that it can be used for inbound traffic and outbound
816 * traffic. The best example of such and SA is a multicast
817 * SA (which allows me to receive the outbound traffic).
820 assoc
->sadb_sa_flags
|= IPSA_F_INBOUND
;
821 primary
= sq
.inbound
;
822 secondary
= sq
.outbound
;
823 if (ksi
->ks_in_srctype
!= KS_IN_ADDR_NOTME
)
829 * If the source address literally not mine (either
830 * unspecified or not mine), then this SA may have an
831 * address that WILL be mine after some configuration.
832 * We pay the price for this by making it a bi-directional
835 case KS_IN_ADDR_NOTME
:
836 assoc
->sadb_sa_flags
|= IPSA_F_OUTBOUND
;
837 primary
= sq
.outbound
;
838 secondary
= sq
.inbound
;
839 if (ksi
->ks_in_srctype
!= KS_IN_ADDR_ME
) {
840 assoc
->sadb_sa_flags
|= IPSA_F_INBOUND
;
845 *diagnostic
= SADB_X_DIAGNOSTIC_BAD_DST
;
851 * Find a ACQUIRE list entry if possible. If we've added an SA that
852 * suits the needs of an ACQUIRE list entry, we can eliminate the
853 * ACQUIRE list entry and transmit the enqueued packets. Use the
854 * high-bit of the sequence number to queue it. Key off destination
855 * addr, and change acqrec's state.
858 if (samsg
->sadb_msg_seq
& IACQF_LOWEST_SEQ
) {
859 acq_bucket
= &(sq
.sp
->sdb_acq
[sq
.outhash
]);
860 mutex_enter(&acq_bucket
->iacqf_lock
);
861 for (acqrec
= acq_bucket
->iacqf_ipsacq
; acqrec
!= NULL
;
862 acqrec
= acqrec
->ipsacq_next
) {
863 mutex_enter(&acqrec
->ipsacq_lock
);
865 * Q: I only check sequence. Should I check dst?
866 * A: Yes, check dest because those are the packets
867 * that are queued up.
869 if (acqrec
->ipsacq_seq
== samsg
->sadb_msg_seq
&&
870 IPSA_ARE_ADDR_EQUAL(sq
.dstaddr
,
871 acqrec
->ipsacq_dstaddr
, acqrec
->ipsacq_addrfam
))
873 mutex_exit(&acqrec
->ipsacq_lock
);
875 if (acqrec
!= NULL
) {
877 * AHA! I found an ACQUIRE record for this SA.
878 * Grab the msg list, and free the acquire record.
879 * I already am holding the lock for this record,
880 * so all I have to do is free it.
882 acq_msgs
= acqrec
->ipsacq_mp
;
883 acqrec
->ipsacq_mp
= NULL
;
884 mutex_exit(&acqrec
->ipsacq_lock
);
885 sadb_destroy_acquire(acqrec
, ns
);
887 mutex_exit(&acq_bucket
->iacqf_lock
);
891 * Find PF_KEY message, and see if I'm an update. If so, find entry
892 * in larval list (if there).
897 if (samsg
->sadb_msg_type
== SADB_UPDATE
) {
898 mutex_enter(&sq
.inbound
->isaf_lock
);
899 larval
= ipsec_getassocbyspi(sq
.inbound
, sq
.assoc
->sadb_sa_spi
,
900 ALL_ZEROES_PTR
, sq
.dstaddr
, sq
.dst
->sin_family
);
901 mutex_exit(&sq
.inbound
->isaf_lock
);
903 if ((larval
== NULL
) ||
904 (larval
->ipsa_state
!= IPSA_STATE_LARVAL
)) {
905 *diagnostic
= SADB_X_DIAGNOSTIC_SA_NOTFOUND
;
906 if (larval
!= NULL
) {
907 IPSA_REFRELE(larval
);
909 ah0dbg(("Larval update, but larval disappeared.\n"));
911 } /* Else sadb_common_add unlinks it for me! */
914 if (larval
!= NULL
) {
916 * Hold again, because sadb_common_add() consumes a reference,
917 * and we don't want to clear_lpkt() without a reference.
919 IPSA_REFHOLD(larval
);
922 rc
= sadb_common_add(ahstack
->ah_pfkey_q
, mp
,
923 samsg
, ksi
, primary
, secondary
, larval
, clone
, is_inbound
,
924 diagnostic
, ns
, &ahstack
->ah_sadb
);
926 if (larval
!= NULL
) {
928 lpkt
= sadb_clear_lpkt(larval
);
930 rc
= !taskq_dispatch(ah_taskq
, inbound_task
,
934 IPSA_REFRELE(larval
);
938 * How much more stack will I create with all of these
939 * ah_outbound_*() calls?
942 /* Handle the packets queued waiting for the SA */
943 while (acq_msgs
!= NULL
) {
950 acq_msgs
= acq_msgs
->b_next
;
951 asyncmp
->b_next
= NULL
;
954 * Extract the ip_xmit_attr_t from the first mblk.
955 * Verifies that the netstack and ill is still around; could
956 * have vanished while iked was doing its work.
957 * On succesful return we have a nce_t and the ill/ipst can't
958 * disappear until we do the nce_refrele in ixa_cleanup.
960 data_mp
= asyncmp
->b_cont
;
961 asyncmp
->b_cont
= NULL
;
962 if (!ip_xmit_attr_from_mblk(asyncmp
, &ixas
)) {
963 AH_BUMP_STAT(ahstack
, out_discards
);
964 ip_drop_packet(data_mp
, B_FALSE
, NULL
,
965 DROPPER(ipss
, ipds_sadb_acquire_timeout
),
966 &ahstack
->ah_dropper
);
967 } else if (rc
!= 0) {
968 ill
= ixas
.ixa_nce
->nce_ill
;
969 AH_BUMP_STAT(ahstack
, out_discards
);
970 ip_drop_packet(data_mp
, B_FALSE
, ill
,
971 DROPPER(ipss
, ipds_sadb_acquire_timeout
),
972 &ahstack
->ah_dropper
);
973 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
975 ah_outbound_finish(data_mp
, &ixas
);
985 * Process one of the queued messages (from ipsacq_mp) once the SA
989 ah_outbound_finish(mblk_t
*data_mp
, ip_xmit_attr_t
*ixa
)
991 netstack_t
*ns
= ixa
->ixa_ipst
->ips_netstack
;
992 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
993 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
994 ill_t
*ill
= ixa
->ixa_nce
->nce_ill
;
996 if (!ipsec_outbound_sa(data_mp
, ixa
, IPPROTO_AH
)) {
997 AH_BUMP_STAT(ahstack
, out_discards
);
998 ip_drop_packet(data_mp
, B_FALSE
, ill
,
999 DROPPER(ipss
, ipds_sadb_acquire_timeout
),
1000 &ahstack
->ah_dropper
);
1001 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
1005 data_mp
= ah_outbound(data_mp
, ixa
);
1006 if (data_mp
== NULL
)
1009 (void) ip_output_post_ipsec(data_mp
, ixa
);
1013 * Add new AH security association. This may become a generic AH/ESP
1014 * routine eventually.
1017 ah_add_sa(mblk_t
*mp
, keysock_in_t
*ksi
, int *diagnostic
, netstack_t
*ns
)
1019 sadb_sa_t
*assoc
= (sadb_sa_t
*)ksi
->ks_in_extv
[SADB_EXT_SA
];
1020 sadb_address_t
*srcext
=
1021 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_EXT_ADDRESS_SRC
];
1022 sadb_address_t
*dstext
=
1023 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_EXT_ADDRESS_DST
];
1024 sadb_address_t
*isrcext
=
1025 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_X_EXT_ADDRESS_INNER_SRC
];
1026 sadb_address_t
*idstext
=
1027 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_X_EXT_ADDRESS_INNER_DST
];
1028 sadb_key_t
*key
= (sadb_key_t
*)ksi
->ks_in_extv
[SADB_EXT_KEY_AUTH
];
1029 struct sockaddr_in
*src
, *dst
;
1030 /* We don't need sockaddr_in6 for now. */
1031 sadb_lifetime_t
*soft
=
1032 (sadb_lifetime_t
*)ksi
->ks_in_extv
[SADB_EXT_LIFETIME_SOFT
];
1033 sadb_lifetime_t
*hard
=
1034 (sadb_lifetime_t
*)ksi
->ks_in_extv
[SADB_EXT_LIFETIME_HARD
];
1035 sadb_lifetime_t
*idle
=
1036 (sadb_lifetime_t
*)ksi
->ks_in_extv
[SADB_X_EXT_LIFETIME_IDLE
];
1037 ipsec_alginfo_t
*aalg
;
1038 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
1039 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
1041 /* I need certain extensions present for an ADD message. */
1042 if (srcext
== NULL
) {
1043 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_SRC
;
1046 if (dstext
== NULL
) {
1047 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_DST
;
1050 if (isrcext
== NULL
&& idstext
!= NULL
) {
1051 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_INNER_SRC
;
1054 if (isrcext
!= NULL
&& idstext
== NULL
) {
1055 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_INNER_DST
;
1058 if (assoc
== NULL
) {
1059 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_SA
;
1063 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_AKEY
;
1067 src
= (struct sockaddr_in
*)(srcext
+ 1);
1068 dst
= (struct sockaddr_in
*)(dstext
+ 1);
1070 /* Sundry ADD-specific reality checks. */
1071 /* XXX STATS : Logging/stats here? */
1073 if ((assoc
->sadb_sa_state
!= SADB_SASTATE_MATURE
) &&
1074 (assoc
->sadb_sa_state
!= SADB_X_SASTATE_ACTIVE_ELSEWHERE
)) {
1075 *diagnostic
= SADB_X_DIAGNOSTIC_BAD_SASTATE
;
1078 if (assoc
->sadb_sa_encrypt
!= SADB_EALG_NONE
) {
1079 *diagnostic
= SADB_X_DIAGNOSTIC_ENCR_NOTSUPP
;
1082 if (assoc
->sadb_sa_flags
& ~ahstack
->ah_sadb
.s_addflags
) {
1083 *diagnostic
= SADB_X_DIAGNOSTIC_BAD_SAFLAGS
;
1086 if ((*diagnostic
= sadb_hardsoftchk(hard
, soft
, idle
)) != 0)
1089 ASSERT(src
->sin_family
== dst
->sin_family
);
1091 /* Stuff I don't support, for now. XXX Diagnostic? */
1092 if (ksi
->ks_in_extv
[SADB_EXT_LIFETIME_CURRENT
] != NULL
)
1093 return (EOPNOTSUPP
);
1095 if (ksi
->ks_in_extv
[SADB_EXT_SENSITIVITY
] != NULL
) {
1096 if (!is_system_labeled())
1097 return (EOPNOTSUPP
);
1100 if (ksi
->ks_in_extv
[SADB_X_EXT_OUTER_SENS
] != NULL
) {
1101 if (!is_system_labeled())
1102 return (EOPNOTSUPP
);
1105 * XXX Policy : I'm not checking identities at this time, but
1106 * if I did, I'd do them here, before I sent the weak key
1107 * check up to the algorithm.
1110 /* verify that there is a mapping for the specified algorithm */
1111 rw_enter(&ipss
->ipsec_alg_lock
, RW_READER
);
1112 aalg
= ipss
->ipsec_alglists
[IPSEC_ALG_AUTH
][assoc
->sadb_sa_auth
];
1113 if (aalg
== NULL
|| !ALG_VALID(aalg
)) {
1114 rw_exit(&ipss
->ipsec_alg_lock
);
1115 ah1dbg(ahstack
, ("Couldn't find auth alg #%d.\n",
1116 assoc
->sadb_sa_auth
));
1117 *diagnostic
= SADB_X_DIAGNOSTIC_BAD_AALG
;
1120 ASSERT(aalg
->alg_mech_type
!= CRYPTO_MECHANISM_INVALID
);
1122 /* sanity check key sizes */
1123 if (!ipsec_valid_key_size(key
->sadb_key_bits
, aalg
)) {
1124 rw_exit(&ipss
->ipsec_alg_lock
);
1125 *diagnostic
= SADB_X_DIAGNOSTIC_BAD_AKEYBITS
;
1129 /* check key and fix parity if needed */
1130 if (ipsec_check_key(aalg
->alg_mech_type
, key
, B_TRUE
,
1132 rw_exit(&ipss
->ipsec_alg_lock
);
1136 rw_exit(&ipss
->ipsec_alg_lock
);
1138 return (ah_add_sa_finish(mp
, (sadb_msg_t
*)mp
->b_cont
->b_rptr
, ksi
,
1139 diagnostic
, ahstack
));
1144 * Update a security association. Updates come in two varieties. The first
1145 * is an update of lifetimes on a non-larval SA. The second is an update of
1146 * a larval SA, which ends up looking a lot more like an add.
1149 ah_update_sa(mblk_t
*mp
, keysock_in_t
*ksi
, int *diagnostic
,
1150 ipsecah_stack_t
*ahstack
, uint8_t sadb_msg_type
)
1152 sadb_sa_t
*assoc
= (sadb_sa_t
*)ksi
->ks_in_extv
[SADB_EXT_SA
];
1153 sadb_address_t
*dstext
=
1154 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_EXT_ADDRESS_DST
];
1158 if (dstext
== NULL
) {
1159 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_DST
;
1163 rcode
= sadb_update_sa(mp
, ksi
, &buf_pkt
, &ahstack
->ah_sadb
,
1164 diagnostic
, ahstack
->ah_pfkey_q
, ah_add_sa
,
1165 ahstack
->ipsecah_netstack
, sadb_msg_type
);
1167 if ((assoc
->sadb_sa_state
!= SADB_X_SASTATE_ACTIVE
) ||
1172 HANDLE_BUF_PKT(ah_taskq
, ahstack
->ipsecah_netstack
->netstack_ipsec
,
1173 ahstack
->ah_dropper
, buf_pkt
);
1180 * Delete a security association. This is REALLY likely to be code common to
1181 * both AH and ESP. Find the association, then unlink it.
1184 ah_del_sa(mblk_t
*mp
, keysock_in_t
*ksi
, int *diagnostic
,
1185 ipsecah_stack_t
*ahstack
, uint8_t sadb_msg_type
)
1187 sadb_sa_t
*assoc
= (sadb_sa_t
*)ksi
->ks_in_extv
[SADB_EXT_SA
];
1188 sadb_address_t
*dstext
=
1189 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_EXT_ADDRESS_DST
];
1190 sadb_address_t
*srcext
=
1191 (sadb_address_t
*)ksi
->ks_in_extv
[SADB_EXT_ADDRESS_SRC
];
1192 struct sockaddr_in
*sin
;
1194 if (assoc
== NULL
) {
1196 sin
= (struct sockaddr_in
*)(dstext
+ 1);
1197 else if (srcext
!= NULL
)
1198 sin
= (struct sockaddr_in
*)(srcext
+ 1);
1200 *diagnostic
= SADB_X_DIAGNOSTIC_MISSING_SA
;
1203 return (sadb_purge_sa(mp
, ksi
,
1204 (sin
->sin_family
== AF_INET6
) ? &ahstack
->ah_sadb
.s_v6
:
1205 &ahstack
->ah_sadb
.s_v4
, diagnostic
, ahstack
->ah_pfkey_q
));
1208 return (sadb_delget_sa(mp
, ksi
, &ahstack
->ah_sadb
, diagnostic
,
1209 ahstack
->ah_pfkey_q
, sadb_msg_type
));
1214 * Convert the entire contents of all of AH's SA tables into PF_KEY SADB_DUMP
1218 ah_dump(mblk_t
*mp
, keysock_in_t
*ksi
, ipsecah_stack_t
*ahstack
)
1224 * Dump each fanout, bailing if error is non-zero.
1227 error
= sadb_dump(ahstack
->ah_pfkey_q
, mp
, ksi
, &ahstack
->ah_sadb
.s_v4
);
1231 error
= sadb_dump(ahstack
->ah_pfkey_q
, mp
, ksi
, &ahstack
->ah_sadb
.s_v6
);
1233 ASSERT(mp
->b_cont
!= NULL
);
1234 samsg
= (sadb_msg_t
*)mp
->b_cont
->b_rptr
;
1235 samsg
->sadb_msg_errno
= (uint8_t)error
;
1236 sadb_pfkey_echo(ahstack
->ah_pfkey_q
, mp
,
1237 (sadb_msg_t
*)mp
->b_cont
->b_rptr
, ksi
, NULL
);
1241 * First-cut reality check for an inbound PF_KEY message.
1244 ah_pfkey_reality_failures(mblk_t
*mp
, keysock_in_t
*ksi
,
1245 ipsecah_stack_t
*ahstack
)
1249 if (mp
->b_cont
== NULL
) {
1254 if (ksi
->ks_in_extv
[SADB_EXT_KEY_ENCRYPT
] != NULL
) {
1255 diagnostic
= SADB_X_DIAGNOSTIC_EKEY_PRESENT
;
1258 if (ksi
->ks_in_extv
[SADB_EXT_PROPOSAL
] != NULL
) {
1259 diagnostic
= SADB_X_DIAGNOSTIC_PROP_PRESENT
;
1262 if (ksi
->ks_in_extv
[SADB_EXT_SUPPORTED_AUTH
] != NULL
||
1263 ksi
->ks_in_extv
[SADB_EXT_SUPPORTED_ENCRYPT
] != NULL
) {
1264 diagnostic
= SADB_X_DIAGNOSTIC_SUPP_PRESENT
;
1267 return (B_FALSE
); /* False ==> no failures */
1270 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, EINVAL
,
1271 diagnostic
, ksi
->ks_in_serial
);
1272 return (B_TRUE
); /* True ==> failures */
1276 * AH parsing of PF_KEY messages. Keysock did most of the really silly
1277 * error cases. What I receive is a fully-formed, syntactically legal
1278 * PF_KEY message. I then need to check semantics...
1280 * This code may become common to AH and ESP. Stay tuned.
1282 * I also make the assumption that db_ref's are cool. If this assumption
1283 * is wrong, this means that someone other than keysock or me has been
1284 * mucking with PF_KEY messages.
1287 ah_parse_pfkey(mblk_t
*mp
, ipsecah_stack_t
*ahstack
)
1289 mblk_t
*msg
= mp
->b_cont
;
1293 int diagnostic
= SADB_X_DIAGNOSTIC_NONE
;
1295 ASSERT(msg
!= NULL
);
1297 samsg
= (sadb_msg_t
*)msg
->b_rptr
;
1298 ksi
= (keysock_in_t
*)mp
->b_rptr
;
1301 * If applicable, convert unspecified AF_INET6 to unspecified
1304 if (!sadb_addrfix(ksi
, ahstack
->ah_pfkey_q
, mp
,
1305 ahstack
->ipsecah_netstack
) ||
1306 ah_pfkey_reality_failures(mp
, ksi
, ahstack
)) {
1310 switch (samsg
->sadb_msg_type
) {
1312 error
= ah_add_sa(mp
, ksi
, &diagnostic
,
1313 ahstack
->ipsecah_netstack
);
1315 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, error
,
1316 diagnostic
, ksi
->ks_in_serial
);
1318 /* else ah_add_sa() took care of things. */
1321 case SADB_X_DELPAIR
:
1322 case SADB_X_DELPAIR_STATE
:
1323 error
= ah_del_sa(mp
, ksi
, &diagnostic
, ahstack
,
1324 samsg
->sadb_msg_type
);
1326 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, error
,
1327 diagnostic
, ksi
->ks_in_serial
);
1329 /* Else ah_del_sa() took care of things. */
1332 error
= sadb_delget_sa(mp
, ksi
, &ahstack
->ah_sadb
, &diagnostic
,
1333 ahstack
->ah_pfkey_q
, samsg
->sadb_msg_type
);
1335 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, error
,
1336 diagnostic
, ksi
->ks_in_serial
);
1338 /* Else sadb_get_sa() took care of things. */
1341 sadbp_flush(&ahstack
->ah_sadb
, ahstack
->ipsecah_netstack
);
1342 sadb_pfkey_echo(ahstack
->ah_pfkey_q
, mp
, samsg
, ksi
, NULL
);
1346 * Hmmm, let's do it! Check for extensions (there should
1347 * be none), extract the fields, call ah_register_out(),
1348 * then either free or report an error.
1350 * Keysock takes care of the PF_KEY bookkeeping for this.
1352 if (ah_register_out(samsg
->sadb_msg_seq
, samsg
->sadb_msg_pid
,
1353 ksi
->ks_in_serial
, ahstack
, msg_getcred(mp
, NULL
))) {
1357 * Only way this path hits is if there is a memory
1358 * failure. It will not return B_FALSE because of
1359 * lack of ah_pfkey_q if I am in wput().
1361 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, ENOMEM
,
1362 diagnostic
, ksi
->ks_in_serial
);
1366 case SADB_X_UPDATEPAIR
:
1368 * Find a larval, if not there, find a full one and get
1371 error
= ah_update_sa(mp
, ksi
, &diagnostic
, ahstack
,
1372 samsg
->sadb_msg_type
);
1374 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, error
,
1375 diagnostic
, ksi
->ks_in_serial
);
1377 /* else ah_update_sa() took care of things. */
1381 * Reserve a new larval entry.
1383 ah_getspi(mp
, ksi
, ahstack
);
1387 * Find larval and/or ACQUIRE record and kill it (them), I'm
1388 * most likely an error. Inbound ACQUIRE messages should only
1389 * have the base header.
1391 sadb_in_acquire(samsg
, &ahstack
->ah_sadb
, ahstack
->ah_pfkey_q
,
1392 ahstack
->ipsecah_netstack
);
1399 ah_dump(mp
, ksi
, ahstack
);
1400 /* ah_dump will take care of the return message, etc. */
1403 /* Should never reach me. */
1404 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, EOPNOTSUPP
,
1405 diagnostic
, ksi
->ks_in_serial
);
1408 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, EINVAL
,
1409 SADB_X_DIAGNOSTIC_UNKNOWN_MSG
, ksi
->ks_in_serial
);
1415 * Handle case where PF_KEY says it can't find a keysock for one of my
1419 ah_keysock_no_socket(mblk_t
*mp
, ipsecah_stack_t
*ahstack
)
1422 keysock_out_err_t
*kse
= (keysock_out_err_t
*)mp
->b_rptr
;
1424 if (mp
->b_cont
== NULL
) {
1428 samsg
= (sadb_msg_t
*)mp
->b_cont
->b_rptr
;
1431 * If keysock can't find any registered, delete the acquire record
1432 * immediately, and handle errors.
1434 if (samsg
->sadb_msg_type
== SADB_ACQUIRE
) {
1435 samsg
->sadb_msg_errno
= kse
->ks_err_errno
;
1436 samsg
->sadb_msg_len
= SADB_8TO64(sizeof (*samsg
));
1438 * Use the write-side of the ah_pfkey_q
1440 sadb_in_acquire(samsg
, &ahstack
->ah_sadb
,
1441 WR(ahstack
->ah_pfkey_q
), ahstack
->ipsecah_netstack
);
1448 * AH module write put routine.
1451 ipsecah_wput(queue_t
*q
, mblk_t
*mp
)
1454 struct iocblk
*iocp
;
1455 ipsecah_stack_t
*ahstack
= (ipsecah_stack_t
*)q
->q_ptr
;
1457 ah3dbg(ahstack
, ("In ah_wput().\n"));
1459 /* NOTE: Each case must take care of freeing or passing mp. */
1460 switch (mp
->b_datap
->db_type
) {
1462 if ((mp
->b_wptr
- mp
->b_rptr
) < sizeof (ipsec_info_t
)) {
1463 /* Not big enough message. */
1467 ii
= (ipsec_info_t
*)mp
->b_rptr
;
1469 switch (ii
->ipsec_info_type
) {
1470 case KEYSOCK_OUT_ERR
:
1471 ah1dbg(ahstack
, ("Got KEYSOCK_OUT_ERR message.\n"));
1472 ah_keysock_no_socket(mp
, ahstack
);
1475 AH_BUMP_STAT(ahstack
, keysock_in
);
1476 ah3dbg(ahstack
, ("Got KEYSOCK_IN message.\n"));
1478 /* Parse the message. */
1479 ah_parse_pfkey(mp
, ahstack
);
1482 sadb_keysock_hello(&ahstack
->ah_pfkey_q
, q
, mp
,
1483 ah_ager
, (void *)ahstack
, &ahstack
->ah_event
,
1487 ah1dbg(ahstack
, ("Got M_CTL from above of 0x%x.\n",
1488 ii
->ipsec_info_type
));
1494 iocp
= (struct iocblk
*)mp
->b_rptr
;
1495 switch (iocp
->ioc_cmd
) {
1498 if (nd_getset(q
, ahstack
->ipsecah_g_nd
, mp
)) {
1502 iocp
->ioc_error
= ENOENT
;
1506 /* We really don't support any other ioctls, do we? */
1509 if (iocp
->ioc_error
!= ENOENT
)
1510 iocp
->ioc_error
= EINVAL
;
1511 iocp
->ioc_count
= 0;
1512 mp
->b_datap
->db_type
= M_IOCACK
;
1518 ("Got default message, type %d, passing to IP.\n",
1519 mp
->b_datap
->db_type
));
1526 * Updating use times can be tricky business if the ipsa_haspeer flag is
1527 * set. This function is called once in an SA's lifetime.
1529 * Caller has to REFRELE "assoc" which is passed in. This function has
1530 * to REFRELE any peer SA that is obtained.
1533 ah_set_usetime(ipsa_t
*assoc
, boolean_t inbound
)
1535 ipsa_t
*inassoc
, *outassoc
;
1540 netstack_t
*ns
= assoc
->ipsa_netstack
;
1541 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
1543 /* No peer? No problem! */
1544 if (!assoc
->ipsa_haspeer
) {
1545 sadb_set_usetime(assoc
);
1550 * Otherwise, we want to grab both the original assoc and its peer.
1551 * There might be a race for this, but if it's a real race, the times
1552 * will be out-of-synch by at most a second, and since our time
1553 * granularity is a second, this won't be a problem.
1555 * If we need tight synchronization on the peer SA, then we need to
1559 /* Use address family to select IPv6/IPv4 */
1560 isv6
= (assoc
->ipsa_addrfam
== AF_INET6
);
1562 sp
= &ahstack
->ah_sadb
.s_v6
;
1564 sp
= &ahstack
->ah_sadb
.s_v4
;
1565 ASSERT(assoc
->ipsa_addrfam
== AF_INET
);
1570 outhash
= OUTBOUND_HASH_V6(sp
,
1571 *((in6_addr_t
*)&inassoc
->ipsa_dstaddr
));
1573 outhash
= OUTBOUND_HASH_V4(sp
,
1574 *((ipaddr_t
*)&inassoc
->ipsa_dstaddr
));
1575 bucket
= &sp
->sdb_of
[outhash
];
1577 mutex_enter(&bucket
->isaf_lock
);
1578 outassoc
= ipsec_getassocbyspi(bucket
, inassoc
->ipsa_spi
,
1579 inassoc
->ipsa_srcaddr
, inassoc
->ipsa_dstaddr
,
1580 inassoc
->ipsa_addrfam
);
1581 mutex_exit(&bucket
->isaf_lock
);
1582 if (outassoc
== NULL
) {
1583 /* Q: Do we wish to set haspeer == B_FALSE? */
1584 ah0dbg(("ah_set_usetime: "
1585 "can't find peer for inbound.\n"));
1586 sadb_set_usetime(inassoc
);
1591 bucket
= INBOUND_BUCKET(sp
, outassoc
->ipsa_spi
);
1592 mutex_enter(&bucket
->isaf_lock
);
1593 inassoc
= ipsec_getassocbyspi(bucket
, outassoc
->ipsa_spi
,
1594 outassoc
->ipsa_srcaddr
, outassoc
->ipsa_dstaddr
,
1595 outassoc
->ipsa_addrfam
);
1596 mutex_exit(&bucket
->isaf_lock
);
1597 if (inassoc
== NULL
) {
1598 /* Q: Do we wish to set haspeer == B_FALSE? */
1599 ah0dbg(("ah_set_usetime: "
1600 "can't find peer for outbound.\n"));
1601 sadb_set_usetime(outassoc
);
1606 /* Update usetime on both. */
1607 sadb_set_usetime(inassoc
);
1608 sadb_set_usetime(outassoc
);
1611 * REFRELE any peer SA.
1613 * Because of the multi-line macro nature of IPSA_REFRELE, keep
1617 IPSA_REFRELE(outassoc
);
1619 IPSA_REFRELE(inassoc
);
1625 * Add a number of bytes to what the SA has protected so far. Return
1626 * B_TRUE if the SA can still protect that many bytes.
1628 * Caller must REFRELE the passed-in assoc. This function must REFRELE
1629 * any obtained peer SA.
1632 ah_age_bytes(ipsa_t
*assoc
, uint64_t bytes
, boolean_t inbound
)
1634 ipsa_t
*inassoc
, *outassoc
;
1636 boolean_t inrc
, outrc
, isv6
;
1639 netstack_t
*ns
= assoc
->ipsa_netstack
;
1640 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
1642 /* No peer? No problem! */
1643 if (!assoc
->ipsa_haspeer
) {
1644 return (sadb_age_bytes(ahstack
->ah_pfkey_q
, assoc
, bytes
,
1649 * Otherwise, we want to grab both the original assoc and its peer.
1650 * There might be a race for this, but if it's a real race, two
1651 * expire messages may occur. We limit this by only sending the
1652 * expire message on one of the peers, we'll pick the inbound
1655 * If we need tight synchronization on the peer SA, then we need to
1659 /* Pick v4/v6 bucket based on addrfam. */
1660 isv6
= (assoc
->ipsa_addrfam
== AF_INET6
);
1662 sp
= &ahstack
->ah_sadb
.s_v6
;
1664 sp
= &ahstack
->ah_sadb
.s_v4
;
1665 ASSERT(assoc
->ipsa_addrfam
== AF_INET
);
1670 outhash
= OUTBOUND_HASH_V6(sp
,
1671 *((in6_addr_t
*)&inassoc
->ipsa_dstaddr
));
1673 outhash
= OUTBOUND_HASH_V4(sp
,
1674 *((ipaddr_t
*)&inassoc
->ipsa_dstaddr
));
1675 bucket
= &sp
->sdb_of
[outhash
];
1676 mutex_enter(&bucket
->isaf_lock
);
1677 outassoc
= ipsec_getassocbyspi(bucket
, inassoc
->ipsa_spi
,
1678 inassoc
->ipsa_srcaddr
, inassoc
->ipsa_dstaddr
,
1679 inassoc
->ipsa_addrfam
);
1680 mutex_exit(&bucket
->isaf_lock
);
1681 if (outassoc
== NULL
) {
1682 /* Q: Do we wish to set haspeer == B_FALSE? */
1683 ah0dbg(("ah_age_bytes: "
1684 "can't find peer for inbound.\n"));
1685 return (sadb_age_bytes(ahstack
->ah_pfkey_q
, inassoc
,
1690 bucket
= INBOUND_BUCKET(sp
, outassoc
->ipsa_spi
);
1691 mutex_enter(&bucket
->isaf_lock
);
1692 inassoc
= ipsec_getassocbyspi(bucket
, outassoc
->ipsa_spi
,
1693 outassoc
->ipsa_srcaddr
, outassoc
->ipsa_dstaddr
,
1694 outassoc
->ipsa_addrfam
);
1695 mutex_exit(&bucket
->isaf_lock
);
1696 if (inassoc
== NULL
) {
1697 /* Q: Do we wish to set haspeer == B_FALSE? */
1698 ah0dbg(("ah_age_bytes: "
1699 "can't find peer for outbound.\n"));
1700 return (sadb_age_bytes(ahstack
->ah_pfkey_q
, outassoc
,
1705 inrc
= sadb_age_bytes(ahstack
->ah_pfkey_q
, inassoc
, bytes
, B_TRUE
);
1706 outrc
= sadb_age_bytes(ahstack
->ah_pfkey_q
, outassoc
, bytes
, B_FALSE
);
1709 * REFRELE any peer SA.
1711 * Because of the multi-line macro nature of IPSA_REFRELE, keep
1715 IPSA_REFRELE(outassoc
);
1717 IPSA_REFRELE(inassoc
);
1720 return (inrc
&& outrc
);
1725 * Handle the SADB_GETSPI message. Create a larval SA.
1728 ah_getspi(mblk_t
*mp
, keysock_in_t
*ksi
, ipsecah_stack_t
*ahstack
)
1730 ipsa_t
*newbie
, *target
;
1731 isaf_t
*outbound
, *inbound
;
1738 * Randomly generate a proposed SPI value.
1740 if (cl_inet_getspi
!= NULL
) {
1741 cl_inet_getspi(ahstack
->ipsecah_netstack
->netstack_stackid
,
1742 IPPROTO_AH
, (uint8_t *)&newspi
, sizeof (uint32_t), NULL
);
1744 (void) random_get_pseudo_bytes((uint8_t *)&newspi
,
1747 newbie
= sadb_getspi(ksi
, newspi
, &diagnostic
,
1748 ahstack
->ipsecah_netstack
, IPPROTO_AH
);
1750 if (newbie
== NULL
) {
1751 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, ENOMEM
, diagnostic
,
1754 } else if (newbie
== (ipsa_t
*)-1) {
1755 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, EINVAL
, diagnostic
,
1761 * XXX - We may randomly collide. We really should recover from this.
1762 * Unfortunately, that could require spending way-too-much-time
1763 * in here. For now, let the user retry.
1766 if (newbie
->ipsa_addrfam
== AF_INET6
) {
1767 outbound
= OUTBOUND_BUCKET_V6(&ahstack
->ah_sadb
.s_v6
,
1768 *(uint32_t *)(newbie
->ipsa_dstaddr
));
1769 inbound
= INBOUND_BUCKET(&ahstack
->ah_sadb
.s_v6
,
1772 outbound
= OUTBOUND_BUCKET_V4(&ahstack
->ah_sadb
.s_v4
,
1773 *(uint32_t *)(newbie
->ipsa_dstaddr
));
1774 inbound
= INBOUND_BUCKET(&ahstack
->ah_sadb
.s_v4
,
1778 mutex_enter(&outbound
->isaf_lock
);
1779 mutex_enter(&inbound
->isaf_lock
);
1782 * Check for collisions (i.e. did sadb_getspi() return with something
1783 * that already exists?).
1785 * Try outbound first. Even though SADB_GETSPI is traditionally
1786 * for inbound SAs, you never know what a user might do.
1788 target
= ipsec_getassocbyspi(outbound
, newbie
->ipsa_spi
,
1789 newbie
->ipsa_srcaddr
, newbie
->ipsa_dstaddr
, newbie
->ipsa_addrfam
);
1790 if (target
== NULL
) {
1791 target
= ipsec_getassocbyspi(inbound
, newbie
->ipsa_spi
,
1792 newbie
->ipsa_srcaddr
, newbie
->ipsa_dstaddr
,
1793 newbie
->ipsa_addrfam
);
1797 * I don't have collisions elsewhere!
1798 * (Nor will I because I'm still holding inbound/outbound locks.)
1801 if (target
!= NULL
) {
1803 IPSA_REFRELE(target
);
1806 * sadb_insertassoc() also checks for collisions, so
1807 * if there's a colliding larval entry, rc will be set
1810 rc
= sadb_insertassoc(newbie
, inbound
);
1811 newbie
->ipsa_hardexpiretime
= gethrestime_sec();
1812 newbie
->ipsa_hardexpiretime
+= ahstack
->ipsecah_larval_timeout
;
1816 * Can exit outbound mutex. Hold inbound until we're done with
1819 mutex_exit(&outbound
->isaf_lock
);
1822 mutex_exit(&inbound
->isaf_lock
);
1823 IPSA_REFRELE(newbie
);
1824 sadb_pfkey_error(ahstack
->ah_pfkey_q
, mp
, rc
,
1825 SADB_X_DIAGNOSTIC_NONE
, ksi
->ks_in_serial
);
1829 /* Can write here because I'm still holding the bucket lock. */
1830 newbie
->ipsa_type
= SADB_SATYPE_AH
;
1833 * Construct successful return message. We have one thing going
1834 * for us in PF_KEY v2. That's the fact that
1835 * sizeof (sadb_spirange_t) == sizeof (sadb_sa_t)
1837 assoc
= (sadb_sa_t
*)ksi
->ks_in_extv
[SADB_EXT_SPIRANGE
];
1838 assoc
->sadb_sa_exttype
= SADB_EXT_SA
;
1839 assoc
->sadb_sa_spi
= newbie
->ipsa_spi
;
1840 *((uint64_t *)(&assoc
->sadb_sa_replay
)) = 0;
1841 mutex_exit(&inbound
->isaf_lock
);
1843 /* Convert KEYSOCK_IN to KEYSOCK_OUT. */
1844 kso
= (keysock_out_t
*)ksi
;
1845 kso
->ks_out_len
= sizeof (*kso
);
1846 kso
->ks_out_serial
= ksi
->ks_in_serial
;
1847 kso
->ks_out_type
= KEYSOCK_OUT
;
1850 * Can safely putnext() to ah_pfkey_q, because this is a turnaround
1851 * from the ah_pfkey_q.
1853 putnext(ahstack
->ah_pfkey_q
, mp
);
1857 * IPv6 sends up the ICMP errors for validation and the removal of the AH
1859 * If succesful, the mp has been modified to not include the AH header so
1860 * that the caller can fanout to the ULP's icmp error handler.
1863 ah_icmp_error_v6(mblk_t
*mp
, ip_recv_attr_t
*ira
, ipsecah_stack_t
*ahstack
)
1865 ip6_t
*ip6h
, *oip6h
;
1866 uint16_t hdr_length
, ah_length
;
1872 uint8_t *post_ah_ptr
;
1873 ipsec_stack_t
*ipss
= ahstack
->ipsecah_netstack
->netstack_ipsec
;
1876 * Eat the cost of a pullupmsg() for now. It makes the rest of this
1877 * code far less convoluted.
1879 if (!pullupmsg(mp
, -1) ||
1880 !ip_hdr_length_nexthdr_v6(mp
, (ip6_t
*)mp
->b_rptr
, &hdr_length
,
1882 mp
->b_rptr
+ hdr_length
+ sizeof (icmp6_t
) + sizeof (ip6_t
) +
1883 sizeof (ah_t
) > mp
->b_wptr
) {
1884 IP_AH_BUMP_STAT(ipss
, in_discards
);
1885 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
1886 DROPPER(ipss
, ipds_ah_nomem
),
1887 &ahstack
->ah_dropper
);
1891 oip6h
= (ip6_t
*)mp
->b_rptr
;
1892 icmp6
= (icmp6_t
*)((uint8_t *)oip6h
+ hdr_length
);
1893 ip6h
= (ip6_t
*)(icmp6
+ 1);
1894 if (!ip_hdr_length_nexthdr_v6(mp
, ip6h
, &hdr_length
, &nexthdrp
)) {
1895 IP_AH_BUMP_STAT(ipss
, in_discards
);
1896 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
1897 DROPPER(ipss
, ipds_ah_bad_v6_hdrs
),
1898 &ahstack
->ah_dropper
);
1901 ah
= (ah_t
*)((uint8_t *)ip6h
+ hdr_length
);
1903 isaf
= OUTBOUND_BUCKET_V6(&ahstack
->ah_sadb
.s_v6
, ip6h
->ip6_dst
);
1904 mutex_enter(&isaf
->isaf_lock
);
1905 assoc
= ipsec_getassocbyspi(isaf
, ah
->ah_spi
,
1906 (uint32_t *)&ip6h
->ip6_src
, (uint32_t *)&ip6h
->ip6_dst
, AF_INET6
);
1907 mutex_exit(&isaf
->isaf_lock
);
1909 if (assoc
== NULL
) {
1910 IP_AH_BUMP_STAT(ipss
, lookup_failure
);
1911 IP_AH_BUMP_STAT(ipss
, in_discards
);
1912 if (ahstack
->ipsecah_log_unknown_spi
) {
1913 ipsec_assocfailure(info
.mi_idnum
, 0, 0,
1914 SL_CONSOLE
| SL_WARN
| SL_ERROR
,
1915 "Bad ICMP message - No association for the "
1916 "attached AH header whose spi is 0x%x, "
1918 ah
->ah_spi
, &oip6h
->ip6_src
, AF_INET6
,
1919 ahstack
->ipsecah_netstack
);
1921 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
1922 DROPPER(ipss
, ipds_ah_no_sa
),
1923 &ahstack
->ah_dropper
);
1927 IPSA_REFRELE(assoc
);
1930 * There seems to be a valid association. If there is enough of AH
1931 * header remove it, otherwise bail. One could check whether it has
1932 * complete AH header plus 8 bytes but it does not make sense if an
1933 * icmp error is returned for ICMP messages e.g ICMP time exceeded,
1934 * that are being sent up. Let the caller figure out.
1936 * NOTE: ah_length is the number of 32 bit words minus 2.
1938 ah_length
= (ah
->ah_length
<< 2) + 8;
1939 post_ah_ptr
= (uint8_t *)ah
+ ah_length
;
1941 if (post_ah_ptr
> mp
->b_wptr
) {
1942 IP_AH_BUMP_STAT(ipss
, in_discards
);
1943 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
1944 DROPPER(ipss
, ipds_ah_bad_length
),
1945 &ahstack
->ah_dropper
);
1949 ip6h
->ip6_plen
= htons(ntohs(ip6h
->ip6_plen
) - ah_length
);
1950 *nexthdrp
= ah
->ah_nexthdr
;
1951 ovbcopy(post_ah_ptr
, ah
,
1952 (size_t)((uintptr_t)mp
->b_wptr
- (uintptr_t)post_ah_ptr
));
1953 mp
->b_wptr
-= ah_length
;
1959 * IP sends up the ICMP errors for validation and the removal of
1961 * If succesful, the mp has been modified to not include the AH header so
1962 * that the caller can fanout to the ULP's icmp error handler.
1965 ah_icmp_error_v4(mblk_t
*mp
, ip_recv_attr_t
*ira
, ipsecah_stack_t
*ahstack
)
1980 ipsec_stack_t
*ipss
= ahstack
->ipsecah_netstack
->netstack_ipsec
;
1982 oipha
= ipha
= (ipha_t
*)mp
->b_rptr
;
1983 iph_hdr_length
= IPH_HDR_LENGTH(ipha
);
1984 icmph
= (icmph_t
*)&mp
->b_rptr
[iph_hdr_length
];
1986 ipha
= (ipha_t
*)&icmph
[1];
1987 hdr_length
= IPH_HDR_LENGTH(ipha
);
1990 * See if we have enough to locate the SPI
1992 if ((uchar_t
*)ipha
+ hdr_length
+ 8 > mp
->b_wptr
) {
1993 if (!pullupmsg(mp
, (uchar_t
*)ipha
+ hdr_length
+ 8 -
1995 ipsec_rl_strlog(ahstack
->ipsecah_netstack
,
1996 info
.mi_idnum
, 0, 0,
1998 "ICMP error: Small AH header\n");
1999 IP_AH_BUMP_STAT(ipss
, in_discards
);
2000 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
2001 DROPPER(ipss
, ipds_ah_bad_length
),
2002 &ahstack
->ah_dropper
);
2005 icmph
= (icmph_t
*)&mp
->b_rptr
[iph_hdr_length
];
2006 ipha
= (ipha_t
*)&icmph
[1];
2009 ah
= (ah_t
*)((uint8_t *)ipha
+ hdr_length
);
2010 nexthdr
= ah
->ah_nexthdr
;
2012 hptr
= OUTBOUND_BUCKET_V4(&ahstack
->ah_sadb
.s_v4
, ipha
->ipha_dst
);
2013 mutex_enter(&hptr
->isaf_lock
);
2014 assoc
= ipsec_getassocbyspi(hptr
, ah
->ah_spi
,
2015 (uint32_t *)&ipha
->ipha_src
, (uint32_t *)&ipha
->ipha_dst
, AF_INET
);
2016 mutex_exit(&hptr
->isaf_lock
);
2018 if (assoc
== NULL
) {
2019 IP_AH_BUMP_STAT(ipss
, lookup_failure
);
2020 IP_AH_BUMP_STAT(ipss
, in_discards
);
2021 if (ahstack
->ipsecah_log_unknown_spi
) {
2022 ipsec_assocfailure(info
.mi_idnum
, 0, 0,
2023 SL_CONSOLE
| SL_WARN
| SL_ERROR
,
2024 "Bad ICMP message - No association for the "
2025 "attached AH header whose spi is 0x%x, "
2027 ah
->ah_spi
, &oipha
->ipha_src
, AF_INET
,
2028 ahstack
->ipsecah_netstack
);
2030 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
2031 DROPPER(ipss
, ipds_ah_no_sa
),
2032 &ahstack
->ah_dropper
);
2036 IPSA_REFRELE(assoc
);
2038 * There seems to be a valid association. If there
2039 * is enough of AH header remove it, otherwise remove
2040 * as much as possible and send it back. One could check
2041 * whether it has complete AH header plus 8 bytes but it
2042 * does not make sense if an icmp error is returned for
2043 * ICMP messages e.g ICMP time exceeded, that are being
2044 * sent up. Let the caller figure out.
2046 * NOTE: ah_length is the number of 32 bit words minus 2.
2048 ah_length
= (ah
->ah_length
<< 2) + 8;
2050 if ((uchar_t
*)ipha
+ hdr_length
+ ah_length
> mp
->b_wptr
) {
2051 if (mp
->b_cont
== NULL
) {
2053 * There is nothing to pullup. Just remove as
2054 * much as possible. This is a common case for
2057 ah_length
= (mp
->b_wptr
- ((uchar_t
*)ipha
+
2061 /* Pullup the full ah header */
2062 if (!pullupmsg(mp
, (uchar_t
*)ah
+ ah_length
- mp
->b_rptr
)) {
2064 * pullupmsg could have failed if there was not
2065 * enough to pullup or memory allocation failed.
2066 * We tried hard, give up now.
2068 IP_AH_BUMP_STAT(ipss
, in_discards
);
2069 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
2070 DROPPER(ipss
, ipds_ah_nomem
),
2071 &ahstack
->ah_dropper
);
2074 icmph
= (icmph_t
*)&mp
->b_rptr
[iph_hdr_length
];
2075 ipha
= (ipha_t
*)&icmph
[1];
2079 * Remove the AH header and change the protocol.
2080 * Don't update the spi fields in the ip_recv_attr_t
2081 * as we are called just to validate the
2082 * message attached to the ICMP message.
2084 * If we never pulled up since all of the message
2085 * is in one single mblk, we can't remove the AH header
2086 * by just setting the b_wptr to the beginning of the
2087 * AH header. We need to allocate a mblk that can hold
2088 * up until the inner IP header and copy them.
2090 alloc_size
= iph_hdr_length
+ sizeof (icmph_t
) + hdr_length
;
2092 if ((mp1
= allocb(alloc_size
, BPRI_LO
)) == NULL
) {
2093 IP_AH_BUMP_STAT(ipss
, in_discards
);
2094 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
2095 DROPPER(ipss
, ipds_ah_nomem
),
2096 &ahstack
->ah_dropper
);
2099 bcopy(mp
->b_rptr
, mp1
->b_rptr
, alloc_size
);
2100 mp1
->b_wptr
+= alloc_size
;
2103 * Skip whatever we have copied and as much of AH header
2104 * possible. If we still have something left in the original
2107 mp
->b_rptr
= (uchar_t
*)ipha
+ hdr_length
+ ah_length
;
2109 if (mp
->b_rptr
!= mp
->b_wptr
) {
2112 if (mp
->b_cont
!= NULL
)
2113 mp1
->b_cont
= mp
->b_cont
;
2117 ipha
= (ipha_t
*)(mp1
->b_rptr
+ iph_hdr_length
+ sizeof (icmph_t
));
2118 ipha
->ipha_protocol
= nexthdr
;
2119 length
= ntohs(ipha
->ipha_length
);
2120 length
-= ah_length
;
2121 ipha
->ipha_length
= htons((uint16_t)length
);
2122 ipha
->ipha_hdr_checksum
= 0;
2123 ipha
->ipha_hdr_checksum
= (uint16_t)ip_csum_hdr(ipha
);
2129 * IP calls this to validate the ICMP errors that
2130 * we got from the network.
2133 ipsecah_icmp_error(mblk_t
*data_mp
, ip_recv_attr_t
*ira
)
2135 netstack_t
*ns
= ira
->ira_ill
->ill_ipst
->ips_netstack
;
2136 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
2138 if (ira
->ira_flags
& IRAF_IS_IPV4
)
2139 return (ah_icmp_error_v4(data_mp
, ira
, ahstack
));
2141 return (ah_icmp_error_v6(data_mp
, ira
, ahstack
));
2145 ah_fix_tlv_options_v6(uint8_t *oi_opt
, uint8_t *pi_opt
, uint_t ehdrlen
,
2146 uint8_t hdr_type
, boolean_t copy_always
)
2151 ASSERT(hdr_type
== IPPROTO_DSTOPTS
|| hdr_type
== IPPROTO_HOPOPTS
);
2154 * Copy the next header and hdr ext. len of the HOP-by-HOP
2155 * and Destination option.
2157 *pi_opt
++ = *oi_opt
++;
2158 *pi_opt
++ = *oi_opt
++;
2162 * Now handle all the TLV encoded options.
2164 while (ehdrlen
!= 0) {
2167 if (opt_type
== IP6OPT_PAD1
) {
2172 optlen
= 2 + oi_opt
[1];
2173 if (optlen
> ehdrlen
)
2176 if (copy_always
|| !(opt_type
& IP6OPT_MUTABLE
)) {
2177 bcopy(oi_opt
, pi_opt
, optlen
);
2183 * Copy the type and data length fields.
2184 * Zero the option data by skipping
2185 * option type and option data len
2189 *(pi_opt
+ 1) = *(oi_opt
+ 1);
2190 bzero(pi_opt
+ 2, optlen
- 2);
2203 * Construct a pseudo header for AH, processing all the options.
2205 * oip6h is the IPv6 header of the incoming or outgoing packet.
2206 * ip6h is the pointer to the pseudo headers IPV6 header. All
2207 * the space needed for the options have been allocated including
2210 * If copy_always is set, all the options that appear before AH are copied
2211 * blindly without checking for IP6OPT_MUTABLE. This is used by
2212 * ah_auth_out_done(). Please refer to that function for details.
2216 * * AH header is never copied in this function even if copy_always
2217 * is set. It just returns the ah_offset - offset of the AH header
2218 * and the caller needs to do the copying. This is done so that we
2219 * don't have pass extra arguments e.g. SA etc. and also,
2220 * it is not needed when ah_auth_out_done is calling this function.
2223 ah_fix_phdr_v6(ip6_t
*ip6h
, ip6_t
*oip6h
, boolean_t outbound
,
2224 boolean_t copy_always
)
2229 uint8_t *prev_nexthdr
;
2231 ip6_dest_t
*dsthdr
= NULL
;
2232 ip6_rthdr0_t
*rthdr
;
2238 * In the outbound case for source route, ULP has already moved
2239 * the first hop, which is now in ip6_dst. We need to re-arrange
2240 * the header to make it look like how it would appear in the
2243 * Because of ip_massage_options_v6 the header looks like
2246 * ip6_src = S, ip6_dst = I1. followed by I2,I3,D.
2248 * When it reaches the receiver, it would look like
2250 * ip6_src = S, ip6_dst = D. followed by I1,I2,I3.
2252 * NOTE : We assume that there are no problems with the options
2253 * as IP should have already checked this.
2256 oi_opt
= (uchar_t
*)&oip6h
[1];
2257 pi_opt
= (uchar_t
*)&ip6h
[1];
2260 * We set the prev_nexthdr properly in the pseudo header.
2261 * After we finish authentication and come back from the
2262 * algorithm module, pseudo header will become the real
2265 prev_nexthdr
= (uint8_t *)&ip6h
->ip6_nxt
;
2266 nexthdr
= oip6h
->ip6_nxt
;
2267 /* Assume IP has already stripped it */
2268 ASSERT(nexthdr
!= IPPROTO_FRAGMENT
);
2273 case IPPROTO_HOPOPTS
:
2274 hbhhdr
= (ip6_hbh_t
*)oi_opt
;
2275 nexthdr
= hbhhdr
->ip6h_nxt
;
2276 ehdrlen
= 8 * (hbhhdr
->ip6h_len
+ 1);
2277 ret
= ah_fix_tlv_options_v6(oi_opt
, pi_opt
, ehdrlen
,
2278 IPPROTO_HOPOPTS
, copy_always
);
2280 * Return a zero offset indicating error if there
2285 hbhhdr
= (ip6_hbh_t
*)pi_opt
;
2286 prev_nexthdr
= (uint8_t *)&hbhhdr
->ip6h_nxt
;
2288 case IPPROTO_ROUTING
:
2289 rthdr
= (ip6_rthdr0_t
*)oi_opt
;
2290 nexthdr
= rthdr
->ip6r0_nxt
;
2291 ehdrlen
= 8 * (rthdr
->ip6r0_len
+ 1);
2292 if (!copy_always
&& outbound
) {
2294 ip6_rthdr0_t
*prthdr
;
2295 in6_addr_t
*ap
, *pap
;
2297 left
= rthdr
->ip6r0_segleft
;
2298 prthdr
= (ip6_rthdr0_t
*)pi_opt
;
2299 pap
= (in6_addr_t
*)(prthdr
+ 1);
2300 ap
= (in6_addr_t
*)(rthdr
+ 1);
2302 * First eight bytes except seg_left
2303 * does not change en route.
2305 bcopy(oi_opt
, pi_opt
, 8);
2306 prthdr
->ip6r0_segleft
= 0;
2308 * First address has been moved to
2309 * the destination address of the
2310 * ip header by ip_massage_options_v6.
2311 * And the real destination address is
2312 * in the last address part of the
2315 *pap
= oip6h
->ip6_dst
;
2316 for (i
= 1; i
< left
- 1; i
++)
2318 ip6h
->ip6_dst
= *(ap
+ left
- 1);
2320 bcopy(oi_opt
, pi_opt
, ehdrlen
);
2322 rthdr
= (ip6_rthdr0_t
*)pi_opt
;
2323 prev_nexthdr
= (uint8_t *)&rthdr
->ip6r0_nxt
;
2325 case IPPROTO_DSTOPTS
:
2327 * Destination options are tricky. If there is
2328 * a terminal (e.g. non-IPv6-extension) header
2329 * following the destination options, don't
2330 * reset prev_nexthdr or advance the AH insertion
2331 * point and just treat this as a terminal header.
2333 * If this is an inbound packet, just deal with
2336 dsthdr
= (ip6_dest_t
*)oi_opt
;
2338 * XXX I hope common-subexpression elimination
2339 * saves us the double-evaluate.
2341 if (outbound
&& dsthdr
->ip6d_nxt
!= IPPROTO_ROUTING
&&
2342 dsthdr
->ip6d_nxt
!= IPPROTO_HOPOPTS
)
2344 nexthdr
= dsthdr
->ip6d_nxt
;
2345 ehdrlen
= 8 * (dsthdr
->ip6d_len
+ 1);
2346 ret
= ah_fix_tlv_options_v6(oi_opt
, pi_opt
, ehdrlen
,
2347 IPPROTO_DSTOPTS
, copy_always
);
2349 * Return a zero offset indicating error if there
2357 * Be conservative in what you send. We shouldn't
2358 * see two same-scoped AH's in one packet.
2359 * (Inner-IP-scoped AH will be hit by terminal
2360 * header of IP or IPv6.)
2363 return ((uint_t
)(pi_opt
- (uint8_t *)ip6h
));
2367 *prev_nexthdr
= IPPROTO_AH
;
2368 ah
= (ah_t
*)pi_opt
;
2369 ah
->ah_nexthdr
= nexthdr
;
2370 return ((uint_t
)(pi_opt
- (uint8_t *)ip6h
));
2379 ah_finish_up(ah_t
*phdr_ah
, ah_t
*inbound_ah
, ipsa_t
*assoc
,
2380 int ah_data_sz
, int ah_align_sz
, ipsecah_stack_t
*ahstack
)
2387 * 1) Authentication data may have to be padded
2388 * before ICV calculation if ICV is not a multiple
2389 * of 64 bits. This padding is arbitrary and transmitted
2390 * with the packet at the end of the authentication data.
2391 * Payload length should include the padding bytes.
2393 * 2) Explicit padding of the whole datagram may be
2394 * required by the algorithm which need not be
2395 * transmitted. It is assumed that this will be taken
2396 * care by the algorithm module.
2398 bzero(phdr_ah
+ 1, ah_data_sz
); /* Zero out ICV for pseudo-hdr. */
2400 if (inbound_ah
== NULL
) {
2401 /* Outbound AH datagram. */
2403 phdr_ah
->ah_length
= (ah_align_sz
>> 2) + 1;
2404 phdr_ah
->ah_reserved
= 0;
2405 phdr_ah
->ah_spi
= assoc
->ipsa_spi
;
2407 phdr_ah
->ah_replay
=
2408 htonl(atomic_inc_32_nv(&assoc
->ipsa_replay
));
2409 if (phdr_ah
->ah_replay
== 0 && assoc
->ipsa_replay_wsize
!= 0) {
2411 * XXX We have replay counter wrapping. We probably
2412 * want to nuke this SA (and its peer).
2414 ipsec_assocfailure(info
.mi_idnum
, 0, 0,
2415 SL_ERROR
| SL_CONSOLE
| SL_WARN
,
2416 "Outbound AH SA (0x%x), dst %s has wrapped "
2417 "sequence.\n", phdr_ah
->ah_spi
,
2418 assoc
->ipsa_dstaddr
, assoc
->ipsa_addrfam
,
2419 ahstack
->ipsecah_netstack
);
2421 sadb_replay_delete(assoc
);
2422 /* Caller will free phdr_mp and return NULL. */
2426 if (ah_data_sz
!= ah_align_sz
) {
2427 uchar_t
*pad
= ((uchar_t
*)phdr_ah
+ sizeof (ah_t
) +
2430 for (i
= 0; i
< (ah_align_sz
- ah_data_sz
); i
++) {
2431 pad
[i
] = (uchar_t
)i
; /* Fill the padding */
2435 /* Inbound AH datagram. */
2436 phdr_ah
->ah_nexthdr
= inbound_ah
->ah_nexthdr
;
2437 phdr_ah
->ah_length
= inbound_ah
->ah_length
;
2438 phdr_ah
->ah_reserved
= 0;
2439 ASSERT(inbound_ah
->ah_spi
== assoc
->ipsa_spi
);
2440 phdr_ah
->ah_spi
= inbound_ah
->ah_spi
;
2441 phdr_ah
->ah_replay
= inbound_ah
->ah_replay
;
2443 if (ah_data_sz
!= ah_align_sz
) {
2444 uchar_t
*opad
= ((uchar_t
*)inbound_ah
+
2445 sizeof (ah_t
) + ah_data_sz
);
2446 uchar_t
*pad
= ((uchar_t
*)phdr_ah
+ sizeof (ah_t
) +
2449 for (i
= 0; i
< (ah_align_sz
- ah_data_sz
); i
++) {
2450 pad
[i
] = opad
[i
]; /* Copy the padding */
2459 * Called upon failing the inbound ICV check. The message passed as
2460 * argument is freed.
2463 ah_log_bad_auth(mblk_t
*mp
, ip_recv_attr_t
*ira
, ipsec_crypto_t
*ic
)
2465 boolean_t isv4
= (ira
->ira_flags
& IRAF_IS_IPV4
);
2466 ipsa_t
*assoc
= ira
->ira_ipsec_ah_sa
;
2469 netstack_t
*ns
= ira
->ira_ill
->ill_ipst
->ips_netstack
;
2470 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
2471 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
2473 ASSERT(mp
->b_datap
->db_type
== M_DATA
);
2475 mp
->b_rptr
-= ic
->ic_skip_len
;
2478 ipha_t
*ipha
= (ipha_t
*)mp
->b_rptr
;
2479 addr
= &ipha
->ipha_dst
;
2482 ip6_t
*ip6h
= (ip6_t
*)mp
->b_rptr
;
2483 addr
= &ip6h
->ip6_dst
;
2488 * Log the event. Don't print to the console, block
2489 * potential denial-of-service attack.
2491 AH_BUMP_STAT(ahstack
, bad_auth
);
2493 ipsec_assocfailure(info
.mi_idnum
, 0, 0, SL_ERROR
| SL_WARN
,
2494 "AH Authentication failed spi %x, dst_addr %s",
2495 assoc
->ipsa_spi
, addr
, af
, ahstack
->ipsecah_netstack
);
2497 IP_AH_BUMP_STAT(ipss
, in_discards
);
2498 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
2499 DROPPER(ipss
, ipds_ah_bad_auth
),
2500 &ahstack
->ah_dropper
);
2504 * Kernel crypto framework callback invoked after completion of async
2505 * crypto requests for outbound packets.
2508 ah_kcf_callback_outbound(void *arg
, int status
)
2510 mblk_t
*mp
= (mblk_t
*)arg
;
2513 ipsec_stack_t
*ipss
;
2514 ipsecah_stack_t
*ahstack
;
2516 ip_xmit_attr_t ixas
;
2521 * First remove the ipsec_crypto_t mblk
2522 * Note that we need to ipsec_free_crypto_data(mp) once done with ic.
2524 async_mp
= ipsec_remove_crypto_data(mp
, &ic
);
2525 ASSERT(async_mp
!= NULL
);
2528 * Extract the ip_xmit_attr_t from the first mblk.
2529 * Verifies that the netstack and ill is still around; could
2530 * have vanished while kEf was doing its work.
2531 * On succesful return we have a nce_t and the ill/ipst can't
2532 * disappear until we do the nce_refrele in ixa_cleanup.
2534 data_mp
= async_mp
->b_cont
;
2535 async_mp
->b_cont
= NULL
;
2536 if (!ip_xmit_attr_from_mblk(async_mp
, &ixas
)) {
2537 /* Disappeared on us - no ill/ipst for MIB */
2538 if (ixas
.ixa_nce
!= NULL
) {
2539 ill
= ixas
.ixa_nce
->nce_ill
;
2540 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
2541 ip_drop_output("ipIfStatsOutDiscards", data_mp
, ill
);
2546 ns
= ixas
.ixa_ipst
->ips_netstack
;
2547 ahstack
= ns
->netstack_ipsecah
;
2548 ipss
= ns
->netstack_ipsec
;
2549 ill
= ixas
.ixa_nce
->nce_ill
;
2551 if (status
== CRYPTO_SUCCESS
) {
2552 data_mp
= ah_auth_out_done(data_mp
, &ixas
, ic
);
2553 if (data_mp
== NULL
)
2556 (void) ip_output_post_ipsec(data_mp
, &ixas
);
2558 /* Outbound shouldn't see invalid MAC */
2559 ASSERT(status
!= CRYPTO_INVALID_MAC
);
2562 ("ah_kcf_callback_outbound: crypto failed with 0x%x\n",
2564 AH_BUMP_STAT(ahstack
, crypto_failures
);
2565 AH_BUMP_STAT(ahstack
, out_discards
);
2567 ip_drop_packet(data_mp
, B_FALSE
, ill
,
2568 DROPPER(ipss
, ipds_ah_crypto_failed
),
2569 &ahstack
->ah_dropper
);
2570 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
2574 (void) ipsec_free_crypto_data(mp
);
2578 * Kernel crypto framework callback invoked after completion of async
2579 * crypto requests for inbound packets.
2582 ah_kcf_callback_inbound(void *arg
, int status
)
2584 mblk_t
*mp
= (mblk_t
*)arg
;
2587 ipsec_stack_t
*ipss
;
2588 ipsecah_stack_t
*ahstack
;
2590 ip_recv_attr_t iras
;
2594 * First remove the ipsec_crypto_t mblk
2595 * Note that we need to ipsec_free_crypto_data(mp) once done with ic.
2597 async_mp
= ipsec_remove_crypto_data(mp
, &ic
);
2598 ASSERT(async_mp
!= NULL
);
2601 * Extract the ip_xmit_attr_t from the first mblk.
2602 * Verifies that the netstack and ill is still around; could
2603 * have vanished while kEf was doing its work.
2605 data_mp
= async_mp
->b_cont
;
2606 async_mp
->b_cont
= NULL
;
2607 if (!ip_recv_attr_from_mblk(async_mp
, &iras
)) {
2608 /* The ill or ip_stack_t disappeared on us */
2609 ip_drop_input("ip_recv_attr_from_mblk", data_mp
, NULL
);
2613 ns
= iras
.ira_ill
->ill_ipst
->ips_netstack
;
2614 ahstack
= ns
->netstack_ipsecah
;
2615 ipss
= ns
->netstack_ipsec
;
2617 if (status
== CRYPTO_SUCCESS
) {
2618 data_mp
= ah_auth_in_done(data_mp
, &iras
, ic
);
2619 if (data_mp
== NULL
)
2622 /* finish IPsec processing */
2623 ip_input_post_ipsec(data_mp
, &iras
);
2625 } else if (status
== CRYPTO_INVALID_MAC
) {
2626 ah_log_bad_auth(data_mp
, &iras
, ic
);
2629 ("ah_kcf_callback_inbound: crypto failed with 0x%x\n",
2631 AH_BUMP_STAT(ahstack
, crypto_failures
);
2632 IP_AH_BUMP_STAT(ipss
, in_discards
);
2633 ip_drop_packet(data_mp
, B_TRUE
, iras
.ira_ill
,
2634 DROPPER(ipss
, ipds_ah_crypto_failed
),
2635 &ahstack
->ah_dropper
);
2636 BUMP_MIB(iras
.ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
2639 ira_cleanup(&iras
, B_TRUE
);
2640 (void) ipsec_free_crypto_data(mp
);
2644 * Invoked on kernel crypto failure during inbound and outbound processing.
2647 ah_crypto_failed(mblk_t
*data_mp
, boolean_t is_inbound
, int kef_rc
,
2648 ill_t
*ill
, ipsecah_stack_t
*ahstack
)
2650 ipsec_stack_t
*ipss
= ahstack
->ipsecah_netstack
->netstack_ipsec
;
2652 ah1dbg(ahstack
, ("crypto failed for %s AH with 0x%x\n",
2653 is_inbound
? "inbound" : "outbound", kef_rc
));
2654 ip_drop_packet(data_mp
, is_inbound
, ill
,
2655 DROPPER(ipss
, ipds_ah_crypto_failed
),
2656 &ahstack
->ah_dropper
);
2657 AH_BUMP_STAT(ahstack
, crypto_failures
);
2659 IP_AH_BUMP_STAT(ipss
, in_discards
);
2661 AH_BUMP_STAT(ahstack
, out_discards
);
2665 * Helper macros for the ah_submit_req_{inbound,outbound}() functions.
2669 * A statement-equivalent macro, _cr MUST point to a modifiable
2670 * crypto_call_req_t.
2672 #define AH_INIT_CALLREQ(_cr, _mp, _callback) \
2673 (_cr)->cr_flag = CRYPTO_SKIP_REQID|CRYPTO_ALWAYS_QUEUE; \
2674 (_cr)->cr_callback_arg = (_mp); \
2675 (_cr)->cr_callback_func = (_callback)
2677 #define AH_INIT_CRYPTO_DATA(data, msglen, mblk) { \
2678 (data)->cd_format = CRYPTO_DATA_MBLK; \
2679 (data)->cd_mp = mblk; \
2680 (data)->cd_offset = 0; \
2681 (data)->cd_length = msglen; \
2684 #define AH_INIT_CRYPTO_MAC(mac, icvlen, icvbuf) { \
2685 (mac)->cd_format = CRYPTO_DATA_RAW; \
2686 (mac)->cd_offset = 0; \
2687 (mac)->cd_length = icvlen; \
2688 (mac)->cd_raw.iov_base = icvbuf; \
2689 (mac)->cd_raw.iov_len = icvlen; \
2693 * Submit an inbound packet for processing by the crypto framework.
2696 ah_submit_req_inbound(mblk_t
*phdr_mp
, ip_recv_attr_t
*ira
,
2697 size_t skip_len
, uint32_t ah_offset
, ipsa_t
*assoc
)
2701 crypto_call_req_t call_req
, *callrp
;
2702 uint_t icv_len
= assoc
->ipsa_mac_len
;
2703 crypto_ctx_template_t ctx_tmpl
;
2704 ipsecah_stack_t
*ahstack
;
2705 ipsec_crypto_t
*ic
, icstack
;
2706 boolean_t force
= (assoc
->ipsa_flags
& IPSA_F_ASYNC
);
2708 ahstack
= ira
->ira_ill
->ill_ipst
->ips_netstack
->netstack_ipsecah
;
2710 ASSERT(phdr_mp
!= NULL
);
2711 ASSERT(phdr_mp
->b_datap
->db_type
== M_DATA
);
2714 /* We are doing asynch; allocate mblks to hold state */
2715 if ((mp
= ip_recv_attr_to_mblk(ira
)) == NULL
||
2716 (mp
= ipsec_add_crypto_data(mp
, &ic
)) == NULL
) {
2717 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
2718 ip_drop_input("ipIfStatsInDiscards", phdr_mp
,
2726 AH_INIT_CALLREQ(callrp
, mp
, ah_kcf_callback_inbound
);
2729 * If we know we are going to do sync then ipsec_crypto_t
2730 * should be on the stack.
2733 bzero(ic
, sizeof (*ic
));
2737 /* init arguments for the crypto framework */
2738 AH_INIT_CRYPTO_DATA(&ic
->ic_crypto_data
, AH_MSGSIZE(phdr_mp
),
2741 AH_INIT_CRYPTO_MAC(&ic
->ic_crypto_mac
, icv_len
,
2742 (char *)phdr_mp
->b_cont
->b_rptr
- skip_len
+ ah_offset
+
2745 ic
->ic_skip_len
= skip_len
;
2747 IPSEC_CTX_TMPL(assoc
, ipsa_authtmpl
, IPSEC_ALG_AUTH
, ctx_tmpl
);
2749 /* call KEF to do the MAC operation */
2750 kef_rc
= crypto_mac_verify(&assoc
->ipsa_amech
,
2751 &ic
->ic_crypto_data
, &assoc
->ipsa_kcfauthkey
, ctx_tmpl
,
2752 &ic
->ic_crypto_mac
, callrp
);
2755 case CRYPTO_SUCCESS
:
2756 AH_BUMP_STAT(ahstack
, crypto_sync
);
2757 phdr_mp
= ah_auth_in_done(phdr_mp
, ira
, ic
);
2759 /* Free mp after we are done with ic */
2760 mp
= ipsec_free_crypto_data(mp
);
2761 (void) ip_recv_attr_free_mblk(mp
);
2765 /* ah_kcf_callback_inbound() will be invoked on completion */
2766 AH_BUMP_STAT(ahstack
, crypto_async
);
2768 case CRYPTO_INVALID_MAC
:
2769 /* Free mp after we are done with ic */
2770 AH_BUMP_STAT(ahstack
, crypto_sync
);
2771 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
2772 ah_log_bad_auth(phdr_mp
, ira
, ic
);
2773 /* phdr_mp was passed to ip_drop_packet */
2775 mp
= ipsec_free_crypto_data(mp
);
2776 (void) ip_recv_attr_free_mblk(mp
);
2782 mp
= ipsec_free_crypto_data(mp
);
2783 phdr_mp
= ip_recv_attr_free_mblk(mp
);
2785 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
2786 ah_crypto_failed(phdr_mp
, B_TRUE
, kef_rc
, ira
->ira_ill
, ahstack
);
2787 /* phdr_mp was passed to ip_drop_packet */
2792 * Submit an outbound packet for processing by the crypto framework.
2795 ah_submit_req_outbound(mblk_t
*phdr_mp
, ip_xmit_attr_t
*ixa
,
2796 size_t skip_len
, ipsa_t
*assoc
)
2800 crypto_call_req_t call_req
, *callrp
;
2801 uint_t icv_len
= assoc
->ipsa_mac_len
;
2802 ipsecah_stack_t
*ahstack
;
2803 ipsec_crypto_t
*ic
, icstack
;
2804 ill_t
*ill
= ixa
->ixa_nce
->nce_ill
;
2805 boolean_t force
= (assoc
->ipsa_flags
& IPSA_F_ASYNC
);
2807 ahstack
= ill
->ill_ipst
->ips_netstack
->netstack_ipsecah
;
2809 ASSERT(phdr_mp
!= NULL
);
2810 ASSERT(phdr_mp
->b_datap
->db_type
== M_DATA
);
2813 /* We are doing asynch; allocate mblks to hold state */
2814 if ((mp
= ip_xmit_attr_to_mblk(ixa
)) == NULL
||
2815 (mp
= ipsec_add_crypto_data(mp
, &ic
)) == NULL
) {
2816 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
2817 ip_drop_output("ipIfStatsOutDiscards", phdr_mp
, ill
);
2823 AH_INIT_CALLREQ(callrp
, mp
, ah_kcf_callback_outbound
);
2826 * If we know we are going to do sync then ipsec_crypto_t
2827 * should be on the stack.
2830 bzero(ic
, sizeof (*ic
));
2834 /* init arguments for the crypto framework */
2835 AH_INIT_CRYPTO_DATA(&ic
->ic_crypto_data
, AH_MSGSIZE(phdr_mp
),
2838 AH_INIT_CRYPTO_MAC(&ic
->ic_crypto_mac
, icv_len
,
2839 (char *)phdr_mp
->b_wptr
);
2841 ic
->ic_skip_len
= skip_len
;
2843 ASSERT(ixa
->ixa_ipsec_ah_sa
!= NULL
);
2845 /* call KEF to do the MAC operation */
2846 kef_rc
= crypto_mac(&assoc
->ipsa_amech
, &ic
->ic_crypto_data
,
2847 &assoc
->ipsa_kcfauthkey
, assoc
->ipsa_authtmpl
,
2848 &ic
->ic_crypto_mac
, callrp
);
2851 case CRYPTO_SUCCESS
:
2852 AH_BUMP_STAT(ahstack
, crypto_sync
);
2853 phdr_mp
= ah_auth_out_done(phdr_mp
, ixa
, ic
);
2855 /* Free mp after we are done with ic */
2856 mp
= ipsec_free_crypto_data(mp
);
2857 (void) ip_xmit_attr_free_mblk(mp
);
2861 /* ah_kcf_callback_outbound() will be invoked on completion */
2862 AH_BUMP_STAT(ahstack
, crypto_async
);
2867 mp
= ipsec_free_crypto_data(mp
);
2868 phdr_mp
= ip_xmit_attr_free_mblk(mp
);
2870 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
2871 ah_crypto_failed(phdr_mp
, B_FALSE
, kef_rc
, NULL
, ahstack
);
2872 /* phdr_mp was passed to ip_drop_packet */
2877 * This function constructs a pseudo header by looking at the IP header
2878 * and options if any. This is called for both outbound and inbound,
2879 * before computing the ICV.
2882 ah_process_ip_options_v6(mblk_t
*mp
, ipsa_t
*assoc
, int *length_to_skip
,
2883 uint_t ah_data_sz
, boolean_t outbound
, ipsecah_stack_t
*ahstack
)
2894 * Allocate space for the authentication data also. It is
2895 * useful both during the ICV calculation where we need to
2896 * feed in zeroes and while sending the datagram back to IP
2897 * where we will be using the same space.
2899 * We need to allocate space for padding bytes if it is not
2900 * a multiple of IPV6_PADDING_ALIGN.
2902 * In addition, we allocate space for the ICV computed by
2903 * the kernel crypto framework, saving us a separate kmem
2904 * allocation down the road.
2907 ah_align_sz
= P2ALIGN(ah_data_sz
+ IPV6_PADDING_ALIGN
- 1,
2908 IPV6_PADDING_ALIGN
);
2910 ASSERT(ah_align_sz
>= ah_data_sz
);
2912 hdr_size
= ipsec_ah_get_hdr_size_v6(mp
, B_FALSE
);
2913 option_length
= hdr_size
- IPV6_HDR_LEN
;
2915 /* This was not included in ipsec_ah_get_hdr_size_v6() */
2916 hdr_size
+= (sizeof (ah_t
) + ah_align_sz
);
2918 if (!outbound
&& (MBLKL(mp
) < hdr_size
)) {
2920 * We have post-AH header options in a separate mblk,
2921 * a pullup is required.
2923 if (!pullupmsg(mp
, hdr_size
))
2927 if ((phdr_mp
= allocb_tmpl(hdr_size
+ ah_data_sz
, mp
)) == NULL
) {
2931 oip6h
= (ip6_t
*)mp
->b_rptr
;
2934 * Form the basic IP header first. Zero out the header
2935 * so that the mutable fields are zeroed out.
2937 ip6h
= (ip6_t
*)phdr_mp
->b_rptr
;
2938 bzero(ip6h
, sizeof (ip6_t
));
2939 ip6h
->ip6_vcf
= IPV6_DEFAULT_VERS_AND_FLOW
;
2943 * Include the size of AH and authentication data.
2944 * This is how our recipient would compute the
2945 * authentication data. Look at what we do in the
2946 * inbound case below.
2948 ip6h
->ip6_plen
= htons(ntohs(oip6h
->ip6_plen
) +
2949 sizeof (ah_t
) + ah_align_sz
);
2951 ip6h
->ip6_plen
= oip6h
->ip6_plen
;
2954 ip6h
->ip6_src
= oip6h
->ip6_src
;
2955 ip6h
->ip6_dst
= oip6h
->ip6_dst
;
2957 *length_to_skip
= IPV6_HDR_LEN
;
2958 if (option_length
== 0) {
2959 /* Form the AH header */
2960 ip6h
->ip6_nxt
= IPPROTO_AH
;
2961 ((ah_t
*)(ip6h
+ 1))->ah_nexthdr
= oip6h
->ip6_nxt
;
2962 ah_offset
= *length_to_skip
;
2964 ip6h
->ip6_nxt
= oip6h
->ip6_nxt
;
2965 /* option_length does not include the AH header's size */
2966 *length_to_skip
+= option_length
;
2968 ah_offset
= ah_fix_phdr_v6(ip6h
, oip6h
, outbound
, B_FALSE
);
2969 if (ah_offset
== 0) {
2974 if (!ah_finish_up(((ah_t
*)((uint8_t *)ip6h
+ ah_offset
)),
2975 (outbound
? NULL
: ((ah_t
*)((uint8_t *)oip6h
+ ah_offset
))),
2976 assoc
, ah_data_sz
, ah_align_sz
, ahstack
)) {
2979 * Returning NULL will tell the caller to
2980 * IPSA_REFELE(), free the memory, etc.
2985 phdr_mp
->b_wptr
= ((uint8_t *)ip6h
+ ah_offset
+ sizeof (ah_t
) +
2988 *length_to_skip
+= sizeof (ah_t
) + ah_align_sz
;
2993 * This function constructs a pseudo header by looking at the IP header
2994 * and options if any. This is called for both outbound and inbound,
2995 * before computing the ICV.
2998 ah_process_ip_options_v4(mblk_t
*mp
, ipsa_t
*assoc
, int *length_to_skip
,
2999 uint_t ah_data_sz
, boolean_t outbound
, ipsecah_stack_t
*ahstack
)
3002 uint32_t option_length
;
3011 uint32_t v_hlen_tos_len
;
3017 #define V_HLEN (v_hlen_tos_len >> 24)
3019 #define V_HLEN (v_hlen_tos_len & 0xFF)
3022 oipha
= (ipha_t
*)mp
->b_rptr
;
3023 v_hlen_tos_len
= ((uint32_t *)oipha
)[0];
3026 * Allocate space for the authentication data also. It is
3027 * useful both during the ICV calculation where we need to
3028 * feed in zeroes and while sending the datagram back to IP
3029 * where we will be using the same space.
3031 * We need to allocate space for padding bytes if it is not
3032 * a multiple of IPV4_PADDING_ALIGN.
3034 * In addition, we allocate space for the ICV computed by
3035 * the kernel crypto framework, saving us a separate kmem
3036 * allocation down the road.
3039 ah_align_sz
= P2ALIGN(ah_data_sz
+ IPV4_PADDING_ALIGN
- 1,
3040 IPV4_PADDING_ALIGN
);
3042 ASSERT(ah_align_sz
>= ah_data_sz
);
3044 size
= IP_SIMPLE_HDR_LENGTH
+ sizeof (ah_t
) + ah_align_sz
+
3047 if (V_HLEN
!= IP_SIMPLE_HDR_VERSION
) {
3048 option_length
= oipha
->ipha_version_and_hdr_length
-
3049 (uint8_t)((IP_VERSION
<< 4) +
3050 IP_SIMPLE_HDR_LENGTH_IN_WORDS
);
3051 option_length
<<= 2;
3052 size
+= option_length
;
3055 if ((phdr_mp
= allocb_tmpl(size
, mp
)) == NULL
) {
3060 * Form the basic IP header first.
3062 ipha
= (ipha_t
*)phdr_mp
->b_rptr
;
3063 ipha
->ipha_version_and_hdr_length
= oipha
->ipha_version_and_hdr_length
;
3064 ipha
->ipha_type_of_service
= 0;
3068 * Include the size of AH and authentication data.
3069 * This is how our recipient would compute the
3070 * authentication data. Look at what we do in the
3071 * inbound case below.
3073 ipha
->ipha_length
= ntohs(htons(oipha
->ipha_length
) +
3074 sizeof (ah_t
) + ah_align_sz
);
3076 ipha
->ipha_length
= oipha
->ipha_length
;
3079 ipha
->ipha_ident
= oipha
->ipha_ident
;
3080 ipha
->ipha_fragment_offset_and_flags
= 0;
3082 ipha
->ipha_protocol
= IPPROTO_AH
;
3083 ipha
->ipha_hdr_checksum
= 0;
3084 ipha
->ipha_src
= oipha
->ipha_src
;
3085 ipha
->ipha_dst
= dst
= oipha
->ipha_dst
;
3088 * If there is no option to process return now.
3090 ip_hdr_length
= IP_SIMPLE_HDR_LENGTH
;
3092 if (V_HLEN
== IP_SIMPLE_HDR_VERSION
) {
3093 /* Form the AH header */
3097 ip_hdr_length
+= option_length
;
3100 * We have options. In the outbound case for source route,
3101 * ULP has already moved the first hop, which is now in
3102 * ipha_dst. We need the final destination for the calculation
3103 * of authentication data. And also make sure that mutable
3104 * and experimental fields are zeroed out in the IP options.
3107 bcopy(&oipha
[1], &ipha
[1], option_length
);
3109 for (optval
= ipoptp_first(&opts
, ipha
);
3110 optval
!= IPOPT_EOL
;
3111 optval
= ipoptp_next(&opts
)) {
3112 optptr
= opts
.ipoptp_cur
;
3113 optlen
= opts
.ipoptp_len
;
3119 case IPOPT_SECURITY
:
3121 * These options are Immutable, leave them as-is.
3122 * Note that IPOPT_NOP is also Immutable, but it
3123 * was skipped by ipoptp_next() and thus remains
3124 * intact in the header.
3129 if ((opts
.ipoptp_flags
& IPOPTP_ERROR
) != 0)
3132 * These two are mutable and will be zeroed, but
3133 * first get the final destination.
3135 off
= optptr
[IPOPT_OFFSET
];
3137 * If one of the conditions is true, it means
3138 * end of options and dst already has the right
3139 * value. So, just fall through.
3141 if (!(optlen
< IP_ADDR_LEN
|| off
> optlen
- 3)) {
3142 off
= optlen
- IP_ADDR_LEN
;
3143 bcopy(&optptr
[off
], &dst
, IP_ADDR_LEN
);
3151 * optlen should include from the beginning of an
3153 * NOTE : Stream Identifier Option (SID): RFC 791
3154 * shows the bit pattern of optlen as 2 and documents
3155 * the length as 4. We assume it to be 2 here.
3157 bzero(optptr
, optlen
);
3162 if ((opts
.ipoptp_flags
& IPOPTP_ERROR
) != 0) {
3164 ah1dbg(ahstack
, ("AH : bad IPv4 option"));
3170 * Don't change ipha_dst for an inbound datagram as it points
3171 * to the right value. Only for the outbound with LSRR/SSRR,
3172 * because of ip_massage_options called by the ULP, ipha_dst
3173 * points to the first hop and we need to use the final
3174 * destination for computing the ICV.
3178 ipha
->ipha_dst
= dst
;
3180 ((ah_t
*)((uint8_t *)ipha
+ ip_hdr_length
))->ah_nexthdr
=
3181 oipha
->ipha_protocol
;
3182 if (!ah_finish_up(((ah_t
*)((uint8_t *)ipha
+ ip_hdr_length
)),
3183 (outbound
? NULL
: ((ah_t
*)((uint8_t *)oipha
+ ip_hdr_length
))),
3184 assoc
, ah_data_sz
, ah_align_sz
, ahstack
)) {
3187 * Returning NULL will tell the caller to IPSA_REFELE(), free
3193 phdr_mp
->b_wptr
= ((uchar_t
*)ipha
+ ip_hdr_length
+
3194 sizeof (ah_t
) + ah_align_sz
);
3196 ASSERT(phdr_mp
->b_wptr
<= phdr_mp
->b_datap
->db_lim
);
3198 *length_to_skip
= ip_hdr_length
;
3200 *length_to_skip
= ip_hdr_length
+ sizeof (ah_t
) + ah_align_sz
;
3205 * Authenticate an outbound datagram. This function is called
3206 * whenever IP sends an outbound datagram that needs authentication.
3207 * Returns a modified packet if done. Returns NULL if error or queued.
3208 * If error return then ipIfStatsOutDiscards has been increased.
3211 ah_outbound(mblk_t
*data_mp
, ip_xmit_attr_t
*ixa
)
3218 netstack_t
*ns
= ixa
->ixa_ipst
->ips_netstack
;
3219 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
3220 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
3221 ill_t
*ill
= ixa
->ixa_nce
->nce_ill
;
3222 boolean_t need_refrele
= B_FALSE
;
3225 * Construct the chain of mblks
3232 AH_BUMP_STAT(ahstack
, out_requests
);
3234 ASSERT(data_mp
->b_datap
->db_type
== M_DATA
);
3236 assoc
= ixa
->ixa_ipsec_ah_sa
;
3237 ASSERT(assoc
!= NULL
);
3241 * Get the outer IP header in shape to escape this system..
3243 if (is_system_labeled() && (assoc
->ipsa_otsl
!= NULL
)) {
3245 * Need to update packet with any CIPSO option and update
3246 * ixa_tsl to capture the new label.
3247 * We allocate a separate ixa for that purpose.
3249 ixa
= ip_xmit_attr_duplicate(ixa
);
3251 ip_drop_packet(data_mp
, B_FALSE
, ill
,
3252 DROPPER(ipss
, ipds_ah_nomem
),
3253 &ahstack
->ah_dropper
);
3256 need_refrele
= B_TRUE
;
3258 label_hold(assoc
->ipsa_otsl
);
3259 ip_xmit_attr_replace_tsl(ixa
, assoc
->ipsa_otsl
);
3261 data_mp
= sadb_whack_label(data_mp
, assoc
, ixa
,
3262 DROPPER(ipss
, ipds_ah_nomem
), &ahstack
->ah_dropper
);
3263 if (data_mp
== NULL
) {
3264 /* Packet dropped by sadb_whack_label */
3271 * Age SA according to number of bytes that will be sent after
3272 * adding the AH header, ICV, and padding to the packet.
3275 if (ixa
->ixa_flags
& IXAF_IS_IPV4
) {
3276 ipha_t
*ipha
= (ipha_t
*)data_mp
->b_rptr
;
3277 ah_align_sz
= P2ALIGN(assoc
->ipsa_mac_len
+
3278 IPV4_PADDING_ALIGN
- 1, IPV4_PADDING_ALIGN
);
3279 age_bytes
= ntohs(ipha
->ipha_length
) + sizeof (ah_t
) +
3282 ip6_t
*ip6h
= (ip6_t
*)data_mp
->b_rptr
;
3283 ah_align_sz
= P2ALIGN(assoc
->ipsa_mac_len
+
3284 IPV6_PADDING_ALIGN
- 1, IPV6_PADDING_ALIGN
);
3285 age_bytes
= sizeof (ip6_t
) + ntohs(ip6h
->ip6_plen
) +
3286 sizeof (ah_t
) + ah_align_sz
;
3289 if (!ah_age_bytes(assoc
, age_bytes
, B_FALSE
)) {
3290 /* rig things as if ipsec_getassocbyconn() failed */
3291 ipsec_assocfailure(info
.mi_idnum
, 0, 0, SL_ERROR
| SL_WARN
,
3292 "AH association 0x%x, dst %s had bytes expire.\n",
3293 ntohl(assoc
->ipsa_spi
), assoc
->ipsa_dstaddr
, AF_INET
,
3294 ahstack
->ipsecah_netstack
);
3295 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
3296 ip_drop_output("ipIfStatsOutDiscards", data_mp
, ill
);
3304 * XXX We need to have fixed up the outer label before we get here.
3305 * (AH is computing the checksum over the outer label).
3309 * Insert pseudo header:
3310 * [IP, ULP] => [IP, AH, ICV] -> ULP
3313 if (ixa
->ixa_flags
& IXAF_IS_IPV4
) {
3314 phdr_mp
= ah_process_ip_options_v4(data_mp
, assoc
,
3315 &length_to_skip
, assoc
->ipsa_mac_len
, B_TRUE
, ahstack
);
3317 phdr_mp
= ah_process_ip_options_v6(data_mp
, assoc
,
3318 &length_to_skip
, assoc
->ipsa_mac_len
, B_TRUE
, ahstack
);
3321 if (phdr_mp
== NULL
) {
3322 AH_BUMP_STAT(ahstack
, out_discards
);
3323 ip_drop_packet(data_mp
, B_FALSE
, ixa
->ixa_nce
->nce_ill
,
3324 DROPPER(ipss
, ipds_ah_bad_v4_opts
),
3325 &ahstack
->ah_dropper
);
3326 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
3332 phdr_mp
->b_cont
= data_mp
;
3333 data_mp
->b_rptr
+= length_to_skip
;
3337 * At this point data_mp points to
3338 * an mblk containing the pseudo header (IP header,
3339 * AH header, and ICV with mutable fields zero'ed out).
3340 * mp points to the mblk containing the ULP data. The original
3341 * IP header is kept before the ULP data in data_mp.
3344 /* submit MAC request to KCF */
3345 data_mp
= ah_submit_req_outbound(data_mp
, ixa
, length_to_skip
, assoc
);
3352 ah_inbound(mblk_t
*data_mp
, void *arg
, ip_recv_attr_t
*ira
)
3354 ah_t
*ah
= (ah_t
*)arg
;
3355 ipsa_t
*assoc
= ira
->ira_ipsec_ah_sa
;
3360 netstack_t
*ns
= ira
->ira_ill
->ill_ipst
->ips_netstack
;
3361 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
3362 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
3364 ASSERT(assoc
!= NULL
);
3367 * We may wish to check replay in-range-only here as an optimization.
3368 * Include the reality check of ipsa->ipsa_replay >
3369 * ipsa->ipsa_replay_wsize for times when it's the first N packets,
3370 * where N == ipsa->ipsa_replay_wsize.
3372 * Another check that may come here later is the "collision" check.
3373 * If legitimate packets flow quickly enough, this won't be a problem,
3374 * but collisions may cause authentication algorithm crunching to
3375 * take place when it doesn't need to.
3377 if (!sadb_replay_peek(assoc
, ah
->ah_replay
)) {
3378 AH_BUMP_STAT(ahstack
, replay_early_failures
);
3379 IP_AH_BUMP_STAT(ipss
, in_discards
);
3380 ip_drop_packet(data_mp
, B_TRUE
, ira
->ira_ill
,
3381 DROPPER(ipss
, ipds_ah_early_replay
),
3382 &ahstack
->ah_dropper
);
3383 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3388 * The offset of the AH header can be computed from its pointer
3389 * within the data mblk, which was pulled up until the AH header
3390 * by ipsec_inbound_ah_sa() during SA selection.
3392 ah_offset
= (uchar_t
*)ah
- data_mp
->b_rptr
;
3395 * We need to pullup until the ICV before we call
3396 * ah_process_ip_options_v6.
3398 ah_length
= (ah
->ah_length
<< 2) + 8;
3401 * NOTE : If we want to use any field of IP/AH header, you need
3402 * to re-assign following the pullup.
3404 if (((uchar_t
*)ah
+ ah_length
) > data_mp
->b_wptr
) {
3405 if (!pullupmsg(data_mp
, (uchar_t
*)ah
+ ah_length
-
3407 (void) ipsec_rl_strlog(ns
, info
.mi_idnum
, 0, 0,
3409 "ah_inbound: Small AH header\n");
3410 IP_AH_BUMP_STAT(ipss
, in_discards
);
3411 ip_drop_packet(data_mp
, B_TRUE
, ira
->ira_ill
,
3412 DROPPER(ipss
, ipds_ah_nomem
),
3413 &ahstack
->ah_dropper
);
3414 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3420 * Insert pseudo header:
3421 * [IP, ULP] => [IP, AH, ICV] -> ULP
3423 if (ira
->ira_flags
& IRAF_IS_IPV4
) {
3424 phdr_mp
= ah_process_ip_options_v4(data_mp
, assoc
,
3425 &length_to_skip
, assoc
->ipsa_mac_len
, B_FALSE
, ahstack
);
3427 phdr_mp
= ah_process_ip_options_v6(data_mp
, assoc
,
3428 &length_to_skip
, assoc
->ipsa_mac_len
, B_FALSE
, ahstack
);
3431 if (phdr_mp
== NULL
) {
3432 IP_AH_BUMP_STAT(ipss
, in_discards
);
3433 ip_drop_packet(data_mp
, B_TRUE
, ira
->ira_ill
,
3434 ((ira
->ira_flags
& IRAF_IS_IPV4
) ?
3435 DROPPER(ipss
, ipds_ah_bad_v4_opts
) :
3436 DROPPER(ipss
, ipds_ah_bad_v6_hdrs
)),
3437 &ahstack
->ah_dropper
);
3438 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3442 phdr_mp
->b_cont
= data_mp
;
3443 data_mp
->b_rptr
+= length_to_skip
;
3446 /* submit request to KCF */
3447 return (ah_submit_req_inbound(data_mp
, ira
, length_to_skip
, ah_offset
,
3452 * Invoked after processing of an inbound packet by the
3453 * kernel crypto framework. Called by ah_submit_req() for a sync request,
3454 * or by the kcf callback for an async request.
3455 * Returns NULL if the mblk chain is consumed.
3458 ah_auth_in_done(mblk_t
*phdr_mp
, ip_recv_attr_t
*ira
, ipsec_crypto_t
*ic
)
3461 uint_t ah_offset
= 0;
3463 int align_len
, newpos
;
3472 kstat_named_t
*counter
;
3473 netstack_t
*ns
= ira
->ira_ill
->ill_ipst
->ips_netstack
;
3474 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
3475 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
3477 isv4
= (ira
->ira_flags
& IRAF_IS_IPV4
);
3478 assoc
= ira
->ira_ipsec_ah_sa
;
3479 icv_len
= (uint_t
)ic
->ic_crypto_mac
.cd_raw
.iov_len
;
3481 if (phdr_mp
== NULL
) {
3482 ip_drop_packet(phdr_mp
, B_TRUE
, ira
->ira_ill
,
3483 DROPPER(ipss
, ipds_ah_nomem
),
3484 &ahstack
->ah_dropper
);
3485 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3489 mp
= phdr_mp
->b_cont
;
3491 ip_drop_packet(phdr_mp
, B_TRUE
, ira
->ira_ill
,
3492 DROPPER(ipss
, ipds_ah_nomem
),
3493 &ahstack
->ah_dropper
);
3494 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3497 mp
->b_rptr
-= ic
->ic_skip_len
;
3499 ah_set_usetime(assoc
, B_TRUE
);
3502 ipha
= (ipha_t
*)mp
->b_rptr
;
3503 ah_offset
= ipha
->ipha_version_and_hdr_length
-
3504 (uint8_t)((IP_VERSION
<< 4));
3506 align_len
= P2ALIGN(icv_len
+ IPV4_PADDING_ALIGN
- 1,
3507 IPV4_PADDING_ALIGN
);
3509 ip6h
= (ip6_t
*)mp
->b_rptr
;
3510 ah_offset
= ipsec_ah_get_hdr_size_v6(mp
, B_TRUE
);
3511 ASSERT((mp
->b_wptr
- mp
->b_rptr
) >= ah_offset
);
3512 align_len
= P2ALIGN(icv_len
+ IPV6_PADDING_ALIGN
- 1,
3513 IPV6_PADDING_ALIGN
);
3516 ah
= (ah_t
*)(mp
->b_rptr
+ ah_offset
);
3517 newpos
= sizeof (ah_t
) + align_len
;
3520 * We get here only when authentication passed.
3523 ah3dbg(ahstack
, ("AH succeeded, checking replay\n"));
3524 AH_BUMP_STAT(ahstack
, good_auth
);
3526 if (!sadb_replay_check(assoc
, ah
->ah_replay
)) {
3531 addr
= &ipha
->ipha_dst
;
3534 addr
= &ip6h
->ip6_dst
;
3539 * Log the event. As of now we print out an event.
3540 * Do not print the replay failure number, or else
3541 * syslog cannot collate the error messages. Printing
3542 * the replay number that failed (or printing to the
3543 * console) opens a denial-of-service attack.
3545 AH_BUMP_STAT(ahstack
, replay_failures
);
3546 ipsec_assocfailure(info
.mi_idnum
, 0, 0,
3548 "Replay failed for AH spi %x, dst_addr %s",
3549 assoc
->ipsa_spi
, addr
, af
, ahstack
->ipsecah_netstack
);
3550 counter
= DROPPER(ipss
, ipds_ah_replay
);
3555 * We need to remove the AH header from the original
3556 * datagram. Best way to do this is to move the pre-AH headers
3557 * forward in the (relatively simple) IPv4 case. In IPv6, it's
3558 * a bit more complicated because of IPv6's next-header chaining,
3563 * Assign the right protocol, adjust the length as we
3564 * are removing the AH header and adjust the checksum to
3565 * account for the protocol and length.
3567 length
= ntohs(ipha
->ipha_length
);
3568 if (!ah_age_bytes(assoc
, length
, B_TRUE
)) {
3569 /* The ipsa has hit hard expiration, LOG and AUDIT. */
3570 ipsec_assocfailure(info
.mi_idnum
, 0, 0,
3572 "AH Association 0x%x, dst %s had bytes expire.\n",
3573 assoc
->ipsa_spi
, assoc
->ipsa_dstaddr
,
3574 AF_INET
, ahstack
->ipsecah_netstack
);
3575 AH_BUMP_STAT(ahstack
, bytes_expired
);
3576 counter
= DROPPER(ipss
, ipds_ah_bytes_expire
);
3579 ipha
->ipha_protocol
= ah
->ah_nexthdr
;
3582 ipha
->ipha_length
= htons((uint16_t)length
);
3583 ipha
->ipha_hdr_checksum
= 0;
3584 ipha
->ipha_hdr_checksum
= (uint16_t)ip_csum_hdr(ipha
);
3591 ip6_rthdr0_t
*rthdr
;
3594 * Make phdr_mp hold until the AH header and make
3595 * mp hold everything past AH header.
3597 length
= ntohs(ip6h
->ip6_plen
);
3598 if (!ah_age_bytes(assoc
, length
+ sizeof (ip6_t
), B_TRUE
)) {
3599 /* The ipsa has hit hard expiration, LOG and AUDIT. */
3600 ipsec_assocfailure(info
.mi_idnum
, 0, 0,
3602 "AH Association 0x%x, dst %s had bytes "
3603 "expire.\n", assoc
->ipsa_spi
, &ip6h
->ip6_dst
,
3604 AF_INET6
, ahstack
->ipsecah_netstack
);
3605 AH_BUMP_STAT(ahstack
, bytes_expired
);
3606 counter
= DROPPER(ipss
, ipds_ah_bytes_expire
);
3611 * Update the next header field of the header preceding
3612 * AH with the next header field of AH. Start with the
3613 * IPv6 header and proceed with the extension headers
3614 * until we find what we're looking for.
3616 nexthdr
= &ip6h
->ip6_nxt
;
3617 whereptr
= (uchar_t
*)ip6h
;
3618 hdrlen
= sizeof (ip6_t
);
3620 while (*nexthdr
!= IPPROTO_AH
) {
3622 /* Assume IP has already stripped it */
3623 ASSERT(*nexthdr
!= IPPROTO_FRAGMENT
);
3625 case IPPROTO_HOPOPTS
:
3626 hbhhdr
= (ip6_hbh_t
*)whereptr
;
3627 nexthdr
= &hbhhdr
->ip6h_nxt
;
3628 hdrlen
= 8 * (hbhhdr
->ip6h_len
+ 1);
3630 case IPPROTO_DSTOPTS
:
3631 dsthdr
= (ip6_dest_t
*)whereptr
;
3632 nexthdr
= &dsthdr
->ip6d_nxt
;
3633 hdrlen
= 8 * (dsthdr
->ip6d_len
+ 1);
3635 case IPPROTO_ROUTING
:
3636 rthdr
= (ip6_rthdr0_t
*)whereptr
;
3637 nexthdr
= &rthdr
->ip6r0_nxt
;
3638 hdrlen
= 8 * (rthdr
->ip6r0_len
+ 1);
3642 *nexthdr
= ah
->ah_nexthdr
;
3644 ip6h
->ip6_plen
= htons((uint16_t)length
);
3647 /* Now that we've fixed the IP header, move it forward. */
3648 mp
->b_rptr
+= newpos
;
3649 if (IS_P2ALIGNED(mp
->b_rptr
, sizeof (uint32_t))) {
3650 dest32
= (uint32_t *)(mp
->b_rptr
+ ah_offset
);
3651 while (--dest32
>= (uint32_t *)mp
->b_rptr
)
3652 *dest32
= *(dest32
- (newpos
>> 2));
3654 dest
= mp
->b_rptr
+ ah_offset
;
3655 while (--dest
>= mp
->b_rptr
)
3656 *dest
= *(dest
- newpos
);
3661 * If SA is labelled, use its label, else inherit the label
3663 if (is_system_labeled() && (assoc
->ipsa_tsl
!= NULL
)) {
3664 if (!ip_recv_attr_replace_label(ira
, assoc
->ipsa_tsl
)) {
3665 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
3666 DROPPER(ipss
, ipds_ah_nomem
), &ahstack
->ah_dropper
);
3667 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3672 if (assoc
->ipsa_state
== IPSA_STATE_IDLE
) {
3674 * Cluster buffering case. Tell caller that we're
3675 * handling the packet.
3677 sadb_buf_pkt(assoc
, mp
, ira
);
3684 IP_AH_BUMP_STAT(ipss
, in_discards
);
3685 ip_drop_packet(phdr_mp
, B_TRUE
, ira
->ira_ill
, counter
,
3686 &ahstack
->ah_dropper
);
3687 BUMP_MIB(ira
->ira_ill
->ill_ip_mib
, ipIfStatsInDiscards
);
3692 * Invoked after processing of an outbound packet by the
3693 * kernel crypto framework, either by ah_submit_req() for a request
3694 * executed syncrhonously, or by the KEF callback for a request
3695 * executed asynchronously.
3698 ah_auth_out_done(mblk_t
*phdr_mp
, ip_xmit_attr_t
*ixa
, ipsec_crypto_t
*ic
)
3702 uint32_t hdrs_length
;
3707 netstack_t
*ns
= ixa
->ixa_ipst
->ips_netstack
;
3708 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
3709 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
3710 ill_t
*ill
= ixa
->ixa_nce
->nce_ill
;
3712 isv4
= (ixa
->ixa_flags
& IXAF_IS_IPV4
);
3713 icv_len
= ic
->ic_crypto_mac
.cd_raw
.iov_len
;
3715 mp
= phdr_mp
->b_cont
;
3717 ip_drop_packet(phdr_mp
, B_FALSE
, ill
,
3718 DROPPER(ipss
, ipds_ah_nomem
),
3719 &ahstack
->ah_dropper
);
3720 BUMP_MIB(ill
->ill_ip_mib
, ipIfStatsOutDiscards
);
3723 mp
->b_rptr
-= ic
->ic_skip_len
;
3725 ASSERT(ixa
->ixa_flags
& IXAF_IPSEC_SECURE
);
3726 ASSERT(ixa
->ixa_ipsec_ah_sa
!= NULL
);
3727 ah_set_usetime(ixa
->ixa_ipsec_ah_sa
, B_FALSE
);
3733 ipha
= (ipha_t
*)mp
->b_rptr
;
3734 hdrs_length
= ipha
->ipha_version_and_hdr_length
-
3735 (uint8_t)((IP_VERSION
<< 4));
3737 align_len
= P2ALIGN(icv_len
+ IPV4_PADDING_ALIGN
- 1,
3738 IPV4_PADDING_ALIGN
);
3740 * phdr_mp must have the right amount of space for the
3741 * combined IP and AH header. Copy the IP header and
3742 * the ack_data onto AH. Note that the AH header was
3743 * already formed before the ICV calculation and hence
3744 * you don't have to copy it here.
3746 bcopy(mp
->b_rptr
, phdr_mp
->b_rptr
, hdrs_length
);
3748 ptr
= phdr_mp
->b_rptr
+ hdrs_length
+ sizeof (ah_t
);
3749 bcopy(phdr_mp
->b_wptr
, ptr
, icv_len
);
3752 * Compute the new header checksum as we are assigning
3753 * IPPROTO_AH and adjusting the length here.
3755 nipha
= (ipha_t
*)phdr_mp
->b_rptr
;
3757 nipha
->ipha_protocol
= IPPROTO_AH
;
3758 length
= ntohs(nipha
->ipha_length
);
3759 length
+= (sizeof (ah_t
) + align_len
);
3760 nipha
->ipha_length
= htons((uint16_t)length
);
3761 nipha
->ipha_hdr_checksum
= 0;
3762 nipha
->ipha_hdr_checksum
= (uint16_t)ip_csum_hdr(nipha
);
3768 ip6h
= (ip6_t
*)mp
->b_rptr
;
3769 nip6h
= (ip6_t
*)phdr_mp
->b_rptr
;
3770 align_len
= P2ALIGN(icv_len
+ IPV6_PADDING_ALIGN
- 1,
3771 IPV6_PADDING_ALIGN
);
3773 * phdr_mp must have the right amount of space for the
3774 * combined IP and AH header. Copy the IP header with
3775 * options into the pseudo header. When we constructed
3776 * a pseudo header, we did not copy some of the mutable
3777 * fields. We do it now by calling ah_fix_phdr_v6()
3778 * with the last argument B_TRUE. It returns the
3779 * ah_offset into the pseudo header.
3782 bcopy(ip6h
, nip6h
, IPV6_HDR_LEN
);
3783 ah_offset
= ah_fix_phdr_v6(nip6h
, ip6h
, B_TRUE
, B_TRUE
);
3784 ASSERT(ah_offset
!= 0);
3786 * phdr_mp can hold exactly the whole IP header with options
3787 * plus the AH header also. Thus subtracting the AH header's
3788 * size should give exactly how much of the original header
3789 * should be skipped.
3791 hdrs_length
= (phdr_mp
->b_wptr
- phdr_mp
->b_rptr
) -
3792 sizeof (ah_t
) - icv_len
;
3793 bcopy(phdr_mp
->b_wptr
, ((uint8_t *)nip6h
+ ah_offset
+
3794 sizeof (ah_t
)), icv_len
);
3795 length
= ntohs(nip6h
->ip6_plen
);
3796 length
+= (sizeof (ah_t
) + align_len
);
3797 nip6h
->ip6_plen
= htons((uint16_t)length
);
3800 /* Skip the original IP header */
3801 mp
->b_rptr
+= hdrs_length
;
3802 if (mp
->b_rptr
== mp
->b_wptr
) {
3803 phdr_mp
->b_cont
= mp
->b_cont
;
3812 * Wrapper to allow IP to trigger an AH association failure message
3813 * during SA inbound selection.
3816 ipsecah_in_assocfailure(mblk_t
*mp
, char level
, ushort_t sl
, char *fmt
,
3817 uint32_t spi
, void *addr
, int af
, ip_recv_attr_t
*ira
)
3819 netstack_t
*ns
= ira
->ira_ill
->ill_ipst
->ips_netstack
;
3820 ipsecah_stack_t
*ahstack
= ns
->netstack_ipsecah
;
3821 ipsec_stack_t
*ipss
= ns
->netstack_ipsec
;
3823 if (ahstack
->ipsecah_log_unknown_spi
) {
3824 ipsec_assocfailure(info
.mi_idnum
, 0, level
, sl
, fmt
, spi
,
3825 addr
, af
, ahstack
->ipsecah_netstack
);
3828 ip_drop_packet(mp
, B_TRUE
, ira
->ira_ill
,
3829 DROPPER(ipss
, ipds_ah_no_sa
),
3830 &ahstack
->ah_dropper
);
3834 * Initialize the AH input and output processing functions.
3837 ipsecah_init_funcs(ipsa_t
*sa
)
3839 if (sa
->ipsa_output_func
== NULL
)
3840 sa
->ipsa_output_func
= ah_outbound
;
3841 if (sa
->ipsa_input_func
== NULL
)
3842 sa
->ipsa_input_func
= ah_inbound
;