1 /* $FreeBSD: src/sys/opencrypto/crypto.c,v 1.28 2007/10/20 23:23:22 julian Exp $ */
3 * Copyright (c) 2002-2006 Sam Leffler. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 * Cryptographic Subsystem.
29 * This code is derived from the Openbsd Cryptographic Framework (OCF)
30 * that has the copyright shown below. Very little of the original
35 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
37 * This code was written by Angelos D. Keromytis in Athens, Greece, in
38 * February 2000. Network Security Technologies Inc. (NSTI) kindly
39 * supported the development of this code.
41 * Copyright (c) 2000, 2001 Angelos D. Keromytis
43 * Permission to use, copy, and modify this software with or without fee
44 * is hereby granted, provided that this entire notice is included in
45 * all source code copies of any software which is or includes a copy or
46 * modification of this software.
48 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
49 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
50 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
51 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
55 #define CRYPTO_TIMING /* enable timing support */
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/eventhandler.h>
62 #include <sys/kernel.h>
63 #include <sys/kthread.h>
65 #include <sys/module.h>
66 #include <sys/malloc.h>
68 #include <sys/sysctl.h>
70 #include <sys/thread2.h>
71 #include <sys/mplock2.h>
73 #include <vm/vm_zone.h>
77 #include <opencrypto/cryptodev.h>
78 #include <opencrypto/xform.h> /* XXX for M_XDATA */
82 #include "cryptodev_if.h"
85 * Crypto drivers register themselves by allocating a slot in the
86 * crypto_drivers table with crypto_get_driverid() and then registering
87 * each algorithm they support with crypto_register() and crypto_kregister().
89 static struct lock crypto_drivers_lock; /* lock on driver table */
90 #define CRYPTO_DRIVER_LOCK() lockmgr(&crypto_drivers_lock, LK_EXCLUSIVE)
91 #define CRYPTO_DRIVER_UNLOCK() lockmgr(&crypto_drivers_lock, LK_RELEASE)
92 #define CRYPTO_DRIVER_ASSERT() KKASSERT(lockstatus(&crypto_drivers_lock, curthread) != 0)
95 * Crypto device/driver capabilities structure.
98 * (d) - protected by CRYPTO_DRIVER_LOCK()
99 * (q) - protected by CRYPTO_Q_LOCK()
100 * Not tagged fields are read-only.
103 device_t cc_dev; /* (d) device/driver */
104 u_int32_t cc_sessions; /* (d) # of sessions */
105 u_int32_t cc_koperations; /* (d) # os asym operations */
107 * Largest possible operator length (in bits) for each type of
108 * encryption algorithm. XXX not used
110 u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1];
111 u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1];
112 u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1];
114 int cc_flags; /* (d) flags */
115 #define CRYPTOCAP_F_CLEANUP 0x80000000 /* needs resource cleanup */
116 int cc_qblocked; /* (q) symmetric q blocked */
117 int cc_kqblocked; /* (q) asymmetric q blocked */
119 static struct cryptocap *crypto_drivers = NULL;
120 static int crypto_drivers_num = 0;
122 typedef struct crypto_tdinfo {
123 TAILQ_HEAD(,cryptop) crp_q; /* request queues */
124 TAILQ_HEAD(,cryptkop) crp_kq;
126 struct lock crp_lock;
131 * There are two queues for crypto requests; one for symmetric (e.g.
132 * cipher) operations and one for asymmetric (e.g. MOD) operations.
133 * See below for how synchronization is handled.
134 * A single lock is used to lock access to both queues. We could
135 * have one per-queue but having one simplifies handling of block/unblock
138 static struct crypto_tdinfo tdinfo_array[MAXCPU];
140 #define CRYPTO_Q_LOCK(tdinfo) lockmgr(&tdinfo->crp_lock, LK_EXCLUSIVE)
141 #define CRYPTO_Q_UNLOCK(tdinfo) lockmgr(&tdinfo->crp_lock, LK_RELEASE)
144 * There are two queues for processing completed crypto requests; one
145 * for the symmetric and one for the asymmetric ops. We only need one
146 * but have two to avoid type futzing (cryptop vs. cryptkop). A single
147 * lock is used to lock access to both queues. Note that this lock
148 * must be separate from the lock on request queues to insure driver
149 * callbacks don't generate lock order reversals.
151 static TAILQ_HEAD(,cryptop) crp_ret_q; /* callback queues */
152 static TAILQ_HEAD(,cryptkop) crp_ret_kq;
153 static struct lock crypto_ret_q_lock;
154 #define CRYPTO_RETQ_LOCK() lockmgr(&crypto_ret_q_lock, LK_EXCLUSIVE)
155 #define CRYPTO_RETQ_UNLOCK() lockmgr(&crypto_ret_q_lock, LK_RELEASE)
156 #define CRYPTO_RETQ_EMPTY() (TAILQ_EMPTY(&crp_ret_q) && TAILQ_EMPTY(&crp_ret_kq))
159 * Crypto op and desciptor data structures are allocated
160 * from separate private zones.
162 static vm_zone_t cryptop_zone;
163 static vm_zone_t cryptodesc_zone;
165 int crypto_userasymcrypto = 1; /* userland may do asym crypto reqs */
166 SYSCTL_INT(_kern, OID_AUTO, userasymcrypto, CTLFLAG_RW,
167 &crypto_userasymcrypto, 0,
168 "Enable/disable user-mode access to asymmetric crypto support");
169 int crypto_devallowsoft = 0; /* only use hardware crypto for asym */
170 SYSCTL_INT(_kern, OID_AUTO, cryptodevallowsoft, CTLFLAG_RW,
171 &crypto_devallowsoft, 0,
172 "Enable/disable use of software asym crypto support");
173 int crypto_altdispatch = 0; /* dispatch to alternative cpu */
174 SYSCTL_INT(_kern, OID_AUTO, cryptoaltdispatch, CTLFLAG_RW,
175 &crypto_altdispatch, 0,
176 "Do not queue crypto op on current cpu");
178 MALLOC_DEFINE(M_CRYPTO_DATA, "crypto", "crypto session records");
180 static void crypto_proc(void *dummy);
181 static void crypto_ret_proc(void *dummy);
182 static struct thread *cryptoretthread;
183 static void crypto_destroy(void);
184 static int crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint);
185 static int crypto_kinvoke(struct cryptkop *krp, int flags);
187 static struct cryptostats cryptostats;
188 SYSCTL_STRUCT(_kern, OID_AUTO, crypto_stats, CTLFLAG_RW, &cryptostats,
189 cryptostats, "Crypto system statistics");
192 static int crypto_timing = 0;
193 SYSCTL_INT(_debug, OID_AUTO, crypto_timing, CTLFLAG_RW,
194 &crypto_timing, 0, "Enable/disable crypto timing support");
200 crypto_tdinfo_t tdinfo;
204 lockinit(&crypto_drivers_lock, "crypto driver table", 0, LK_CANRECURSE);
206 TAILQ_INIT(&crp_ret_q);
207 TAILQ_INIT(&crp_ret_kq);
208 lockinit(&crypto_ret_q_lock, "crypto return queues", 0, LK_CANRECURSE);
210 cryptop_zone = zinit("cryptop", sizeof (struct cryptop), 0, 0, 1);
211 cryptodesc_zone = zinit("cryptodesc", sizeof (struct cryptodesc),
213 if (cryptodesc_zone == NULL || cryptop_zone == NULL) {
214 kprintf("crypto_init: cannot setup crypto zones\n");
219 crypto_drivers_num = CRYPTO_DRIVERS_INITIAL;
220 crypto_drivers = kmalloc(crypto_drivers_num * sizeof(struct cryptocap),
221 M_CRYPTO_DATA, M_WAITOK | M_ZERO);
222 if (crypto_drivers == NULL) {
223 kprintf("crypto_init: cannot malloc driver table\n");
228 for (n = 0; n < ncpus; ++n) {
229 tdinfo = &tdinfo_array[n];
230 TAILQ_INIT(&tdinfo->crp_q);
231 TAILQ_INIT(&tdinfo->crp_kq);
232 lockinit(&tdinfo->crp_lock, "crypto op queues",
234 kthread_create_cpu(crypto_proc, tdinfo, &tdinfo->crp_td,
237 kthread_create(crypto_ret_proc, NULL,
238 &cryptoretthread, "crypto returns");
246 * Signal a crypto thread to terminate. We use the driver
247 * table lock to synchronize the sleep/wakeups so that we
248 * are sure the threads have terminated before we release
249 * the data structures they use. See crypto_finis below
250 * for the other half of this song-and-dance.
253 crypto_terminate(struct thread **tp, void *q)
257 KKASSERT(lockstatus(&crypto_drivers_lock, curthread) != 0);
261 kprintf("crypto_terminate: start\n");
264 tsleep_interlock(t, 0);
265 CRYPTO_DRIVER_UNLOCK(); /* let crypto_finis progress */
267 tsleep(t, PINTERLOCKED, "crypto_destroy", 0);
268 CRYPTO_DRIVER_LOCK();
269 kprintf("crypto_terminate: end\n");
276 crypto_tdinfo_t tdinfo;
280 * Terminate any crypto threads.
282 CRYPTO_DRIVER_LOCK();
283 for (n = 0; n < ncpus; ++n) {
284 tdinfo = &tdinfo_array[n];
285 crypto_terminate(&tdinfo->crp_td, &tdinfo->crp_q);
286 lockuninit(&tdinfo->crp_lock);
288 crypto_terminate(&cryptoretthread, &crp_ret_q);
289 CRYPTO_DRIVER_UNLOCK();
291 /* XXX flush queues??? */
294 * Reclaim dynamically allocated resources.
296 if (crypto_drivers != NULL)
297 kfree(crypto_drivers, M_CRYPTO_DATA);
299 if (cryptodesc_zone != NULL)
300 zdestroy(cryptodesc_zone);
301 if (cryptop_zone != NULL)
302 zdestroy(cryptop_zone);
303 lockuninit(&crypto_ret_q_lock);
304 lockuninit(&crypto_drivers_lock);
307 static struct cryptocap *
308 crypto_checkdriver(u_int32_t hid)
310 if (crypto_drivers == NULL)
312 return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]);
316 * Compare a driver's list of supported algorithms against another
317 * list; return non-zero if all algorithms are supported.
320 driver_suitable(const struct cryptocap *cap, const struct cryptoini *cri)
322 const struct cryptoini *cr;
324 /* See if all the algorithms are supported. */
325 for (cr = cri; cr; cr = cr->cri_next)
326 if (cap->cc_alg[cr->cri_alg] == 0)
332 * Select a driver for a new session that supports the specified
333 * algorithms and, optionally, is constrained according to the flags.
334 * The algorithm we use here is pretty stupid; just use the
335 * first driver that supports all the algorithms we need. If there
336 * are multiple drivers we choose the driver with the fewest active
337 * sessions. We prefer hardware-backed drivers to software ones.
339 * XXX We need more smarts here (in real life too, but that's
340 * XXX another story altogether).
342 static struct cryptocap *
343 crypto_select_driver(const struct cryptoini *cri, int flags)
345 struct cryptocap *cap, *best;
348 CRYPTO_DRIVER_ASSERT();
351 * Look first for hardware crypto devices if permitted.
353 if (flags & CRYPTOCAP_F_HARDWARE)
354 match = CRYPTOCAP_F_HARDWARE;
356 match = CRYPTOCAP_F_SOFTWARE;
359 for (hid = 0; hid < crypto_drivers_num; hid++) {
360 cap = &crypto_drivers[hid];
362 * If it's not initialized, is in the process of
363 * going away, or is not appropriate (hardware
364 * or software based on match), then skip.
366 if (cap->cc_dev == NULL ||
367 (cap->cc_flags & CRYPTOCAP_F_CLEANUP) ||
368 (cap->cc_flags & match) == 0)
371 /* verify all the algorithms are supported. */
372 if (driver_suitable(cap, cri)) {
374 cap->cc_sessions < best->cc_sessions)
380 if (match == CRYPTOCAP_F_HARDWARE && (flags & CRYPTOCAP_F_SOFTWARE)) {
381 /* sort of an Algol 68-style for loop */
382 match = CRYPTOCAP_F_SOFTWARE;
389 * Create a new session. The crid argument specifies a crypto
390 * driver to use or constraints on a driver to select (hardware
391 * only, software only, either). Whatever driver is selected
392 * must be capable of the requested crypto algorithms.
395 crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int crid)
397 struct cryptocap *cap;
401 CRYPTO_DRIVER_LOCK();
402 if ((crid & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
404 * Use specified driver; verify it is capable.
406 cap = crypto_checkdriver(crid);
407 if (cap != NULL && !driver_suitable(cap, cri))
411 * No requested driver; select based on crid flags.
413 cap = crypto_select_driver(cri, crid);
415 * if NULL then can't do everything in one session.
416 * XXX Fix this. We need to inject a "virtual" session
417 * XXX layer right about here.
421 /* Call the driver initialization routine. */
422 hid = cap - crypto_drivers;
423 lid = hid; /* Pass the driver ID. */
424 err = CRYPTODEV_NEWSESSION(cap->cc_dev, &lid, cri);
426 (*sid) = (cap->cc_flags & 0xff000000)
427 | (hid & 0x00ffffff);
429 (*sid) |= (lid & 0xffffffff);
434 CRYPTO_DRIVER_UNLOCK();
439 crypto_remove(struct cryptocap *cap)
442 KKASSERT(lockstatus(&crypto_drivers_lock, curthread) != 0);
443 if (cap->cc_sessions == 0 && cap->cc_koperations == 0)
444 bzero(cap, sizeof(*cap));
448 * Delete an existing session (or a reserved session on an unregistered
452 crypto_freesession(u_int64_t sid)
454 struct cryptocap *cap;
458 CRYPTO_DRIVER_LOCK();
460 if (crypto_drivers == NULL) {
465 /* Determine two IDs. */
466 hid = CRYPTO_SESID2HID(sid);
468 if (hid >= crypto_drivers_num) {
472 cap = &crypto_drivers[hid];
474 if (cap->cc_sessions)
477 /* Call the driver cleanup routine, if available. */
478 err = CRYPTODEV_FREESESSION(cap->cc_dev, sid);
480 if (cap->cc_flags & CRYPTOCAP_F_CLEANUP)
484 CRYPTO_DRIVER_UNLOCK();
489 * Return an unused driver id. Used by drivers prior to registering
490 * support for the algorithms they handle.
493 crypto_get_driverid(device_t dev, int flags)
495 struct cryptocap *newdrv;
498 if ((flags & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
499 kprintf("%s: no flags specified when registering driver\n",
500 device_get_nameunit(dev));
504 CRYPTO_DRIVER_LOCK();
506 for (i = 0; i < crypto_drivers_num; i++) {
507 if (crypto_drivers[i].cc_dev == NULL &&
508 (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP) == 0) {
513 /* Out of entries, allocate some more. */
514 if (i == crypto_drivers_num) {
515 /* Be careful about wrap-around. */
516 if (2 * crypto_drivers_num <= crypto_drivers_num) {
517 CRYPTO_DRIVER_UNLOCK();
518 kprintf("crypto: driver count wraparound!\n");
522 newdrv = kmalloc(2 * crypto_drivers_num *
523 sizeof(struct cryptocap),
524 M_CRYPTO_DATA, M_WAITOK|M_ZERO);
525 if (newdrv == NULL) {
526 CRYPTO_DRIVER_UNLOCK();
527 kprintf("crypto: no space to expand driver table!\n");
531 bcopy(crypto_drivers, newdrv,
532 crypto_drivers_num * sizeof(struct cryptocap));
534 crypto_drivers_num *= 2;
536 kfree(crypto_drivers, M_CRYPTO_DATA);
537 crypto_drivers = newdrv;
540 /* NB: state is zero'd on free */
541 crypto_drivers[i].cc_sessions = 1; /* Mark */
542 crypto_drivers[i].cc_dev = dev;
543 crypto_drivers[i].cc_flags = flags;
545 kprintf("crypto: assign %s driver id %u, flags %u\n",
546 device_get_nameunit(dev), i, flags);
548 CRYPTO_DRIVER_UNLOCK();
554 * Lookup a driver by name. We match against the full device
555 * name and unit, and against just the name. The latter gives
556 * us a simple widlcarding by device name. On success return the
557 * driver/hardware identifier; otherwise return -1.
560 crypto_find_driver(const char *match)
562 int i, len = strlen(match);
564 CRYPTO_DRIVER_LOCK();
565 for (i = 0; i < crypto_drivers_num; i++) {
566 device_t dev = crypto_drivers[i].cc_dev;
568 (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP))
570 if (strncmp(match, device_get_nameunit(dev), len) == 0 ||
571 strncmp(match, device_get_name(dev), len) == 0)
574 CRYPTO_DRIVER_UNLOCK();
575 return i < crypto_drivers_num ? i : -1;
579 * Return the device_t for the specified driver or NULL
580 * if the driver identifier is invalid.
583 crypto_find_device_byhid(int hid)
585 struct cryptocap *cap = crypto_checkdriver(hid);
586 return cap != NULL ? cap->cc_dev : NULL;
590 * Return the device/driver capabilities.
593 crypto_getcaps(int hid)
595 struct cryptocap *cap = crypto_checkdriver(hid);
596 return cap != NULL ? cap->cc_flags : 0;
600 * Register support for a key-related algorithm. This routine
601 * is called once for each algorithm supported a driver.
604 crypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags)
606 struct cryptocap *cap;
609 CRYPTO_DRIVER_LOCK();
611 cap = crypto_checkdriver(driverid);
613 (CRK_ALGORITM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) {
615 * XXX Do some performance testing to determine placing.
616 * XXX We probably need an auxiliary data structure that
617 * XXX describes relative performances.
620 cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
622 kprintf("crypto: %s registers key alg %u flags %u\n"
623 , device_get_nameunit(cap->cc_dev)
632 CRYPTO_DRIVER_UNLOCK();
637 * Register support for a non-key-related algorithm. This routine
638 * is called once for each such algorithm supported by a driver.
641 crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
644 struct cryptocap *cap;
647 CRYPTO_DRIVER_LOCK();
649 cap = crypto_checkdriver(driverid);
650 /* NB: algorithms are in the range [1..max] */
652 (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX)) {
654 * XXX Do some performance testing to determine placing.
655 * XXX We probably need an auxiliary data structure that
656 * XXX describes relative performances.
659 cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
660 cap->cc_max_op_len[alg] = maxoplen;
662 kprintf("crypto: %s registers alg %u flags %u maxoplen %u\n"
663 , device_get_nameunit(cap->cc_dev)
668 cap->cc_sessions = 0; /* Unmark */
673 CRYPTO_DRIVER_UNLOCK();
678 driver_finis(struct cryptocap *cap)
682 CRYPTO_DRIVER_ASSERT();
684 ses = cap->cc_sessions;
685 kops = cap->cc_koperations;
686 bzero(cap, sizeof(*cap));
687 if (ses != 0 || kops != 0) {
689 * If there are pending sessions,
690 * just mark as invalid.
692 cap->cc_flags |= CRYPTOCAP_F_CLEANUP;
693 cap->cc_sessions = ses;
694 cap->cc_koperations = kops;
699 * Unregister a crypto driver. If there are pending sessions using it,
700 * leave enough information around so that subsequent calls using those
701 * sessions will correctly detect the driver has been unregistered and
705 crypto_unregister(u_int32_t driverid, int alg)
707 struct cryptocap *cap;
710 CRYPTO_DRIVER_LOCK();
711 cap = crypto_checkdriver(driverid);
713 (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX) &&
714 cap->cc_alg[alg] != 0) {
715 cap->cc_alg[alg] = 0;
716 cap->cc_max_op_len[alg] = 0;
718 /* Was this the last algorithm ? */
719 for (i = 1; i <= CRYPTO_ALGORITHM_MAX; i++) {
720 if (cap->cc_alg[i] != 0)
724 if (i == CRYPTO_ALGORITHM_MAX + 1)
730 CRYPTO_DRIVER_UNLOCK();
736 * Unregister all algorithms associated with a crypto driver.
737 * If there are pending sessions using it, leave enough information
738 * around so that subsequent calls using those sessions will
739 * correctly detect the driver has been unregistered and reroute
743 crypto_unregister_all(u_int32_t driverid)
745 struct cryptocap *cap;
748 CRYPTO_DRIVER_LOCK();
749 cap = crypto_checkdriver(driverid);
756 CRYPTO_DRIVER_UNLOCK();
762 * Clear blockage on a driver. The what parameter indicates whether
763 * the driver is now ready for cryptop's and/or cryptokop's.
766 crypto_unblock(u_int32_t driverid, int what)
768 crypto_tdinfo_t tdinfo;
769 struct cryptocap *cap;
773 CRYPTO_DRIVER_LOCK();
774 cap = crypto_checkdriver(driverid);
776 if (what & CRYPTO_SYMQ)
777 cap->cc_qblocked = 0;
778 if (what & CRYPTO_ASYMQ)
779 cap->cc_kqblocked = 0;
780 for (n = 0; n < ncpus; ++n) {
781 tdinfo = &tdinfo_array[n];
782 CRYPTO_Q_LOCK(tdinfo);
783 if (tdinfo[n].crp_sleep)
784 wakeup_one(&tdinfo->crp_q);
785 CRYPTO_Q_UNLOCK(tdinfo);
791 CRYPTO_DRIVER_UNLOCK();
796 static volatile int dispatch_rover;
799 * Add a crypto request to a queue, to be processed by the kernel thread.
802 crypto_dispatch(struct cryptop *crp)
804 crypto_tdinfo_t tdinfo;
805 struct cryptocap *cap;
810 cryptostats.cs_ops++;
814 nanouptime(&crp->crp_tstamp);
817 hid = CRYPTO_SESID2HID(crp->crp_sid);
820 * Dispatch the crypto op directly to the driver if the caller
821 * marked the request to be processed immediately or this is
822 * a synchronous callback chain occuring from within a crypto
825 * Fall through to queueing the driver is blocked.
827 if ((crp->crp_flags & CRYPTO_F_BATCH) == 0 ||
828 (curthread->td_flags & TDF_CRYPTO)) {
829 cap = crypto_checkdriver(hid);
830 /* Driver cannot disappeared when there is an active session. */
831 KASSERT(cap != NULL, ("%s: Driver disappeared.", __func__));
832 if (!cap->cc_qblocked) {
833 result = crypto_invoke(cap, crp, 0);
834 if (result != ERESTART)
837 * The driver ran out of resources, put the request on
844 * Dispatch to a cpu for action if possible. Dispatch to a different
845 * cpu than the current cpu.
847 if (CRYPTO_SESID2CAPS(crp->crp_sid) & CRYPTOCAP_F_SMP) {
848 n = atomic_fetchadd_int(&dispatch_rover, 1) & 255;
849 if (crypto_altdispatch && mycpu->gd_cpuid == n)
855 tdinfo = &tdinfo_array[n];
857 CRYPTO_Q_LOCK(tdinfo);
858 TAILQ_INSERT_TAIL(&tdinfo->crp_q, crp, crp_next);
859 if (tdinfo->crp_sleep)
860 wakeup_one(&tdinfo->crp_q);
861 CRYPTO_Q_UNLOCK(tdinfo);
866 * Add an asymetric crypto request to a queue,
867 * to be processed by the kernel thread.
870 crypto_kdispatch(struct cryptkop *krp)
872 crypto_tdinfo_t tdinfo;
876 cryptostats.cs_kops++;
879 /* not sure how to test F_SMP here */
880 n = atomic_fetchadd_int(&dispatch_rover, 1) & 255;
884 tdinfo = &tdinfo_array[n];
886 error = crypto_kinvoke(krp, krp->krp_crid);
888 if (error == ERESTART) {
889 CRYPTO_Q_LOCK(tdinfo);
890 TAILQ_INSERT_TAIL(&tdinfo->crp_kq, krp, krp_next);
891 if (tdinfo->crp_sleep)
892 wakeup_one(&tdinfo->crp_q);
893 CRYPTO_Q_UNLOCK(tdinfo);
900 * Verify a driver is suitable for the specified operation.
903 kdriver_suitable(const struct cryptocap *cap, const struct cryptkop *krp)
905 return (cap->cc_kalg[krp->krp_op] & CRYPTO_ALG_FLAG_SUPPORTED) != 0;
909 * Select a driver for an asym operation. The driver must
910 * support the necessary algorithm. The caller can constrain
911 * which device is selected with the flags parameter. The
912 * algorithm we use here is pretty stupid; just use the first
913 * driver that supports the algorithms we need. If there are
914 * multiple suitable drivers we choose the driver with the
915 * fewest active operations. We prefer hardware-backed
916 * drivers to software ones when either may be used.
918 static struct cryptocap *
919 crypto_select_kdriver(const struct cryptkop *krp, int flags)
921 struct cryptocap *cap, *best, *blocked;
924 CRYPTO_DRIVER_ASSERT();
927 * Look first for hardware crypto devices if permitted.
929 if (flags & CRYPTOCAP_F_HARDWARE)
930 match = CRYPTOCAP_F_HARDWARE;
932 match = CRYPTOCAP_F_SOFTWARE;
936 for (hid = 0; hid < crypto_drivers_num; hid++) {
937 cap = &crypto_drivers[hid];
939 * If it's not initialized, is in the process of
940 * going away, or is not appropriate (hardware
941 * or software based on match), then skip.
943 if (cap->cc_dev == NULL ||
944 (cap->cc_flags & CRYPTOCAP_F_CLEANUP) ||
945 (cap->cc_flags & match) == 0)
948 /* verify all the algorithms are supported. */
949 if (kdriver_suitable(cap, krp)) {
951 cap->cc_koperations < best->cc_koperations)
957 if (match == CRYPTOCAP_F_HARDWARE && (flags & CRYPTOCAP_F_SOFTWARE)) {
958 /* sort of an Algol 68-style for loop */
959 match = CRYPTOCAP_F_SOFTWARE;
966 * Dispatch an assymetric crypto request.
969 crypto_kinvoke(struct cryptkop *krp, int crid)
971 struct cryptocap *cap = NULL;
974 KASSERT(krp != NULL, ("%s: krp == NULL", __func__));
975 KASSERT(krp->krp_callback != NULL,
976 ("%s: krp->crp_callback == NULL", __func__));
978 CRYPTO_DRIVER_LOCK();
979 if ((crid & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
980 cap = crypto_checkdriver(crid);
983 * Driver present, it must support the necessary
984 * algorithm and, if s/w drivers are excluded,
985 * it must be registered as hardware-backed.
987 if (!kdriver_suitable(cap, krp) ||
988 (!crypto_devallowsoft &&
989 (cap->cc_flags & CRYPTOCAP_F_HARDWARE) == 0))
994 * No requested driver; select based on crid flags.
996 if (!crypto_devallowsoft) /* NB: disallow s/w drivers */
997 crid &= ~CRYPTOCAP_F_SOFTWARE;
998 cap = crypto_select_kdriver(krp, crid);
1000 if (cap != NULL && !cap->cc_kqblocked) {
1001 krp->krp_hid = cap - crypto_drivers;
1002 cap->cc_koperations++;
1003 CRYPTO_DRIVER_UNLOCK();
1004 error = CRYPTODEV_KPROCESS(cap->cc_dev, krp, 0);
1005 CRYPTO_DRIVER_LOCK();
1006 if (error == ERESTART) {
1007 cap->cc_koperations--;
1008 CRYPTO_DRIVER_UNLOCK();
1013 * NB: cap is !NULL if device is blocked; in
1014 * that case return ERESTART so the operation
1015 * is resubmitted if possible.
1017 error = (cap == NULL) ? ENODEV : ERESTART;
1019 CRYPTO_DRIVER_UNLOCK();
1022 krp->krp_status = error;
1028 #ifdef CRYPTO_TIMING
1030 crypto_tstat(struct cryptotstat *ts, struct timespec *tv)
1032 struct timespec now, t;
1035 t.tv_sec = now.tv_sec - tv->tv_sec;
1036 t.tv_nsec = now.tv_nsec - tv->tv_nsec;
1037 if (t.tv_nsec < 0) {
1039 t.tv_nsec += 1000000000;
1041 timespecadd(&ts->acc, &t);
1042 if (timespeccmp(&t, &ts->min, <))
1044 if (timespeccmp(&t, &ts->max, >))
1053 * Dispatch a crypto request to the appropriate crypto devices.
1056 crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint)
1059 KASSERT(crp != NULL, ("%s: crp == NULL", __func__));
1060 KASSERT(crp->crp_callback != NULL,
1061 ("%s: crp->crp_callback == NULL", __func__));
1062 KASSERT(crp->crp_desc != NULL, ("%s: crp->crp_desc == NULL", __func__));
1064 #ifdef CRYPTO_TIMING
1066 crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp);
1068 if (cap->cc_flags & CRYPTOCAP_F_CLEANUP) {
1069 struct cryptodesc *crd;
1073 * Driver has unregistered; migrate the session and return
1074 * an error to the caller so they'll resubmit the op.
1076 * XXX: What if there are more already queued requests for this
1079 crypto_freesession(crp->crp_sid);
1081 for (crd = crp->crp_desc; crd->crd_next; crd = crd->crd_next)
1082 crd->CRD_INI.cri_next = &(crd->crd_next->CRD_INI);
1084 /* XXX propagate flags from initial session? */
1085 if (crypto_newsession(&nid, &(crp->crp_desc->CRD_INI),
1086 CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE) == 0)
1089 crp->crp_etype = EAGAIN;
1094 * Invoke the driver to process the request.
1096 return CRYPTODEV_PROCESS(cap->cc_dev, crp, hint);
1101 * Release a set of crypto descriptors.
1104 crypto_freereq(struct cryptop *crp)
1106 struct cryptodesc *crd;
1108 crypto_tdinfo_t tdinfo;
1109 struct cryptop *crp2;
1117 for (n = 0; n < ncpus; ++n) {
1118 tdinfo = &tdinfo_array[n];
1120 CRYPTO_Q_LOCK(tdinfo);
1121 TAILQ_FOREACH(crp2, &tdinfo->crp_q, crp_next) {
1122 KASSERT(crp2 != crp,
1123 ("Freeing cryptop from the crypto queue (%p).",
1126 CRYPTO_Q_UNLOCK(tdinfo);
1129 TAILQ_FOREACH(crp2, &crp_ret_q, crp_next) {
1130 KASSERT(crp2 != crp,
1131 ("Freeing cryptop from the return queue (%p).",
1134 CRYPTO_RETQ_UNLOCK();
1137 while ((crd = crp->crp_desc) != NULL) {
1138 crp->crp_desc = crd->crd_next;
1139 zfree(cryptodesc_zone, crd);
1141 zfree(cryptop_zone, crp);
1145 * Acquire a set of crypto descriptors.
1148 crypto_getreq(int num)
1150 struct cryptodesc *crd;
1151 struct cryptop *crp;
1153 crp = zalloc(cryptop_zone);
1155 bzero(crp, sizeof (*crp));
1157 crd = zalloc(cryptodesc_zone);
1159 crypto_freereq(crp);
1162 bzero(crd, sizeof (*crd));
1164 crd->crd_next = crp->crp_desc;
1165 crp->crp_desc = crd;
1172 * Invoke the callback on behalf of the driver.
1175 crypto_done(struct cryptop *crp)
1177 KASSERT((crp->crp_flags & CRYPTO_F_DONE) == 0,
1178 ("crypto_done: op already done, flags 0x%x", crp->crp_flags));
1179 crp->crp_flags |= CRYPTO_F_DONE;
1180 if (crp->crp_etype != 0)
1181 cryptostats.cs_errs++;
1182 #ifdef CRYPTO_TIMING
1184 crypto_tstat(&cryptostats.cs_done, &crp->crp_tstamp);
1187 * CBIMM means unconditionally do the callback immediately;
1188 * CBIFSYNC means do the callback immediately only if the
1189 * operation was done synchronously. Both are used to avoid
1190 * doing extraneous context switches; the latter is mostly
1191 * used with the software crypto driver.
1193 if ((crp->crp_flags & CRYPTO_F_CBIMM) ||
1194 ((crp->crp_flags & CRYPTO_F_CBIFSYNC) &&
1195 (CRYPTO_SESID2CAPS(crp->crp_sid) & CRYPTOCAP_F_SYNC))) {
1197 * Do the callback directly. This is ok when the
1198 * callback routine does very little (e.g. the
1199 * /dev/crypto callback method just does a wakeup).
1201 #ifdef CRYPTO_TIMING
1202 if (crypto_timing) {
1204 * NB: We must copy the timestamp before
1205 * doing the callback as the cryptop is
1206 * likely to be reclaimed.
1208 struct timespec t = crp->crp_tstamp;
1209 crypto_tstat(&cryptostats.cs_cb, &t);
1210 crp->crp_callback(crp);
1211 crypto_tstat(&cryptostats.cs_finis, &t);
1214 crp->crp_callback(crp);
1217 * Normal case; queue the callback for the thread.
1220 if (CRYPTO_RETQ_EMPTY())
1221 wakeup_one(&crp_ret_q); /* shared wait channel */
1222 TAILQ_INSERT_TAIL(&crp_ret_q, crp, crp_next);
1223 CRYPTO_RETQ_UNLOCK();
1228 * Invoke the callback on behalf of the driver.
1231 crypto_kdone(struct cryptkop *krp)
1233 struct cryptocap *cap;
1235 if (krp->krp_status != 0)
1236 cryptostats.cs_kerrs++;
1237 CRYPTO_DRIVER_LOCK();
1238 /* XXX: What if driver is loaded in the meantime? */
1239 if (krp->krp_hid < crypto_drivers_num) {
1240 cap = &crypto_drivers[krp->krp_hid];
1241 cap->cc_koperations--;
1242 KASSERT(cap->cc_koperations >= 0, ("cc_koperations < 0"));
1243 if (cap->cc_flags & CRYPTOCAP_F_CLEANUP)
1246 CRYPTO_DRIVER_UNLOCK();
1248 if (CRYPTO_RETQ_EMPTY())
1249 wakeup_one(&crp_ret_q); /* shared wait channel */
1250 TAILQ_INSERT_TAIL(&crp_ret_kq, krp, krp_next);
1251 CRYPTO_RETQ_UNLOCK();
1255 crypto_getfeat(int *featp)
1257 int hid, kalg, feat = 0;
1259 CRYPTO_DRIVER_LOCK();
1260 for (hid = 0; hid < crypto_drivers_num; hid++) {
1261 const struct cryptocap *cap = &crypto_drivers[hid];
1263 if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) &&
1264 !crypto_devallowsoft) {
1267 for (kalg = 0; kalg <= CRK_ALGORITHM_MAX; kalg++)
1268 if (cap->cc_kalg[kalg] & CRYPTO_ALG_FLAG_SUPPORTED)
1271 CRYPTO_DRIVER_UNLOCK();
1277 * Terminate a thread at module unload. The process that
1278 * initiated this is waiting for us to signal that we're gone;
1279 * wake it up and exit. We use the driver table lock to insure
1280 * we don't do the wakeup before they're waiting. There is no
1281 * race here because the waiter sleeps on the proc lock for the
1282 * thread so it gets notified at the right time because of an
1283 * extra wakeup that's done in exit1().
1286 crypto_finis(void *chan)
1288 CRYPTO_DRIVER_LOCK();
1290 CRYPTO_DRIVER_UNLOCK();
1295 * Crypto thread, dispatches crypto requests.
1300 crypto_proc(void *arg)
1302 crypto_tdinfo_t tdinfo = arg;
1303 struct cryptop *crp, *submit;
1304 struct cryptkop *krp;
1305 struct cryptocap *cap;
1309 CRYPTO_Q_LOCK(tdinfo);
1311 curthread->td_flags |= TDF_CRYPTO;
1315 * Find the first element in the queue that can be
1316 * processed and look-ahead to see if multiple ops
1317 * are ready for the same driver.
1321 TAILQ_FOREACH(crp, &tdinfo->crp_q, crp_next) {
1322 hid = CRYPTO_SESID2HID(crp->crp_sid);
1323 cap = crypto_checkdriver(hid);
1325 * Driver cannot disappeared when there is an active
1328 KASSERT(cap != NULL, ("%s:%u Driver disappeared.",
1329 __func__, __LINE__));
1330 if (cap == NULL || cap->cc_dev == NULL) {
1331 /* Op needs to be migrated, process it. */
1336 if (!cap->cc_qblocked) {
1337 if (submit != NULL) {
1339 * We stop on finding another op,
1340 * regardless whether its for the same
1341 * driver or not. We could keep
1342 * searching the queue but it might be
1343 * better to just use a per-driver
1346 if (CRYPTO_SESID2HID(submit->crp_sid) == hid)
1347 hint = CRYPTO_HINT_MORE;
1351 if ((submit->crp_flags & CRYPTO_F_BATCH) == 0)
1353 /* keep scanning for more are q'd */
1357 if (submit != NULL) {
1358 TAILQ_REMOVE(&tdinfo->crp_q, submit, crp_next);
1359 hid = CRYPTO_SESID2HID(submit->crp_sid);
1360 cap = crypto_checkdriver(hid);
1361 KASSERT(cap != NULL, ("%s:%u Driver disappeared.",
1362 __func__, __LINE__));
1364 CRYPTO_Q_UNLOCK(tdinfo);
1365 result = crypto_invoke(cap, submit, hint);
1366 CRYPTO_Q_LOCK(tdinfo);
1368 if (result == ERESTART) {
1370 * The driver ran out of resources, mark the
1371 * driver ``blocked'' for cryptop's and put
1372 * the request back in the queue. It would
1373 * best to put the request back where we got
1374 * it but that's hard so for now we put it
1375 * at the front. This should be ok; putting
1376 * it at the end does not work.
1378 /* XXX validate sid again? */
1379 crypto_drivers[CRYPTO_SESID2HID(submit->crp_sid)].cc_qblocked = 1;
1380 TAILQ_INSERT_HEAD(&tdinfo->crp_q,
1382 cryptostats.cs_blocks++;
1386 /* As above, but for key ops */
1387 TAILQ_FOREACH(krp, &tdinfo->crp_kq, krp_next) {
1388 cap = crypto_checkdriver(krp->krp_hid);
1389 if (cap == NULL || cap->cc_dev == NULL) {
1391 * Operation needs to be migrated, invalidate
1392 * the assigned device so it will reselect a
1393 * new one below. Propagate the original
1394 * crid selection flags if supplied.
1396 krp->krp_hid = krp->krp_crid &
1397 (CRYPTOCAP_F_SOFTWARE|CRYPTOCAP_F_HARDWARE);
1398 if (krp->krp_hid == 0)
1400 CRYPTOCAP_F_SOFTWARE|CRYPTOCAP_F_HARDWARE;
1403 if (!cap->cc_kqblocked)
1407 TAILQ_REMOVE(&tdinfo->crp_kq, krp, krp_next);
1409 CRYPTO_Q_UNLOCK(tdinfo);
1410 result = crypto_kinvoke(krp, krp->krp_hid);
1411 CRYPTO_Q_LOCK(tdinfo);
1413 if (result == ERESTART) {
1415 * The driver ran out of resources, mark the
1416 * driver ``blocked'' for cryptkop's and put
1417 * the request back in the queue. It would
1418 * best to put the request back where we got
1419 * it but that's hard so for now we put it
1420 * at the front. This should be ok; putting
1421 * it at the end does not work.
1423 /* XXX validate sid again? */
1424 crypto_drivers[krp->krp_hid].cc_kqblocked = 1;
1425 TAILQ_INSERT_HEAD(&tdinfo->crp_kq,
1427 cryptostats.cs_kblocks++;
1431 if (submit == NULL && krp == NULL) {
1433 * Nothing more to be processed. Sleep until we're
1434 * woken because there are more ops to process.
1435 * This happens either by submission or by a driver
1436 * becoming unblocked and notifying us through
1437 * crypto_unblock. Note that when we wakeup we
1438 * start processing each queue again from the
1439 * front. It's not clear that it's important to
1440 * preserve this ordering since ops may finish
1441 * out of order if dispatched to different devices
1442 * and some become blocked while others do not.
1444 tdinfo->crp_sleep = 1;
1445 lksleep (&tdinfo->crp_q, &tdinfo->crp_lock,
1446 0, "crypto_wait", 0);
1447 tdinfo->crp_sleep = 0;
1448 if (tdinfo->crp_td == NULL)
1450 cryptostats.cs_intrs++;
1453 CRYPTO_Q_UNLOCK(tdinfo);
1455 crypto_finis(&tdinfo->crp_q);
1459 * Crypto returns thread, does callbacks for processed crypto requests.
1460 * Callbacks are done here, rather than in the crypto drivers, because
1461 * callbacks typically are expensive and would slow interrupt handling.
1466 crypto_ret_proc(void *dummy __unused)
1468 struct cryptop *crpt;
1469 struct cryptkop *krpt;
1474 /* Harvest return q's for completed ops */
1475 crpt = TAILQ_FIRST(&crp_ret_q);
1477 TAILQ_REMOVE(&crp_ret_q, crpt, crp_next);
1479 krpt = TAILQ_FIRST(&crp_ret_kq);
1481 TAILQ_REMOVE(&crp_ret_kq, krpt, krp_next);
1483 if (crpt != NULL || krpt != NULL) {
1484 CRYPTO_RETQ_UNLOCK();
1486 * Run callbacks unlocked.
1489 #ifdef CRYPTO_TIMING
1490 if (crypto_timing) {
1492 * NB: We must copy the timestamp before
1493 * doing the callback as the cryptop is
1494 * likely to be reclaimed.
1496 struct timespec t = crpt->crp_tstamp;
1497 crypto_tstat(&cryptostats.cs_cb, &t);
1498 crpt->crp_callback(crpt);
1499 crypto_tstat(&cryptostats.cs_finis, &t);
1502 crpt->crp_callback(crpt);
1505 krpt->krp_callback(krpt);
1509 * Nothing more to be processed. Sleep until we're
1510 * woken because there are more returns to process.
1512 lksleep (&crp_ret_q, &crypto_ret_q_lock,
1513 0, "crypto_ret_wait", 0);
1514 if (cryptoretthread == NULL)
1516 cryptostats.cs_rets++;
1519 CRYPTO_RETQ_UNLOCK();
1521 crypto_finis(&crp_ret_q);
1526 db_show_drivers(void)
1530 db_printf("%12s %4s %4s %8s %2s %2s\n"
1538 for (hid = 0; hid < crypto_drivers_num; hid++) {
1539 const struct cryptocap *cap = &crypto_drivers[hid];
1540 if (cap->cc_dev == NULL)
1542 db_printf("%-12s %4u %4u %08x %2u %2u\n"
1543 , device_get_nameunit(cap->cc_dev)
1545 , cap->cc_koperations
1553 DB_SHOW_COMMAND(crypto, db_show_crypto)
1555 crypto_tdinfo_t tdinfo;
1556 struct cryptop *crp;
1562 db_printf("%4s %8s %4s %4s %4s %4s %8s %8s\n",
1563 "HID", "Caps", "Ilen", "Olen", "Etype", "Flags",
1564 "Desc", "Callback");
1566 for (n = 0; n < ncpus; ++n) {
1567 tdinfo = &tdinfo_array[n];
1569 TAILQ_FOREACH(crp, &tdinfo->crp_q, crp_next) {
1570 db_printf("%4u %08x %4u %4u %4u %04x %8p %8p\n"
1571 , (int) CRYPTO_SESID2HID(crp->crp_sid)
1572 , (int) CRYPTO_SESID2CAPS(crp->crp_sid)
1573 , crp->crp_ilen, crp->crp_olen
1581 if (!TAILQ_EMPTY(&crp_ret_q)) {
1582 db_printf("\n%4s %4s %4s %8s\n",
1583 "HID", "Etype", "Flags", "Callback");
1584 TAILQ_FOREACH(crp, &crp_ret_q, crp_next) {
1585 db_printf("%4u %4u %04x %8p\n"
1586 , (int) CRYPTO_SESID2HID(crp->crp_sid)
1595 DB_SHOW_COMMAND(kcrypto, db_show_kcrypto)
1597 crypto_tdinfo_t tdinfo;
1598 struct cryptkop *krp;
1604 db_printf("%4s %5s %4s %4s %8s %4s %8s\n",
1605 "Op", "Status", "#IP", "#OP", "CRID", "HID", "Callback");
1607 for (n = 0; n < ncpus; ++n) {
1608 tdinfo = &tdinfo_array[n];
1610 TAILQ_FOREACH(krp, &tdinfo->crp_kq, krp_next) {
1611 db_printf("%4u %5u %4u %4u %08x %4u %8p\n"
1614 , krp->krp_iparams, krp->krp_oparams
1615 , krp->krp_crid, krp->krp_hid
1620 if (!TAILQ_EMPTY(&crp_ret_q)) {
1621 db_printf("%4s %5s %8s %4s %8s\n",
1622 "Op", "Status", "CRID", "HID", "Callback");
1623 TAILQ_FOREACH(krp, &crp_ret_kq, krp_next) {
1624 db_printf("%4u %5u %08x %4u %8p\n"
1627 , krp->krp_crid, krp->krp_hid
1635 int crypto_modevent(module_t mod, int type, void *unused);
1638 * Initialization code, both for static and dynamic loading.
1639 * Note this is not invoked with the usual MODULE_DECLARE
1640 * mechanism but instead is listed as a dependency by the
1641 * cryptosoft driver. This guarantees proper ordering of
1642 * calls on module load/unload.
1645 crypto_modevent(module_t mod, int type, void *unused)
1651 error = crypto_init();
1652 if (error == 0 && bootverbose)
1653 kprintf("crypto: <crypto core>\n");
1656 /*XXX disallow if active sessions */
1663 MODULE_VERSION(crypto, 1);
1664 MODULE_DEPEND(crypto, zlib, 1, 1, 1);