xref: /freebsd/sys/opencrypto/cryptodev.h (revision d93a896ef95946b0bf1219866fcb324b78543444)
1 /*	$FreeBSD$	*/
2 /*	$OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $	*/
3 
4 /*-
5  * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
6  * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
7  *
8  * This code was written by Angelos D. Keromytis in Athens, Greece, in
9  * February 2000. Network Security Technologies Inc. (NSTI) kindly
10  * supported the development of this code.
11  *
12  * Copyright (c) 2000 Angelos D. Keromytis
13  *
14  * Permission to use, copy, and modify this software with or without fee
15  * is hereby granted, provided that this entire notice is included in
16  * all source code copies of any software which is or includes a copy or
17  * modification of this software.
18  *
19  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
20  * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
21  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
22  * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
23  * PURPOSE.
24  *
25  * Copyright (c) 2001 Theo de Raadt
26  * Copyright (c) 2014 The FreeBSD Foundation
27  * All rights reserved.
28  *
29  * Portions of this software were developed by John-Mark Gurney
30  * under sponsorship of the FreeBSD Foundation and
31  * Rubicon Communications, LLC (Netgate).
32  *
33  * Redistribution and use in source and binary forms, with or without
34  * modification, are permitted provided that the following conditions
35  * are met:
36  *
37  * 1. Redistributions of source code must retain the above copyright
38  *   notice, this list of conditions and the following disclaimer.
39  * 2. Redistributions in binary form must reproduce the above copyright
40  *   notice, this list of conditions and the following disclaimer in the
41  *   documentation and/or other materials provided with the distribution.
42  * 3. The name of the author may not be used to endorse or promote products
43  *   derived from this software without specific prior written permission.
44  *
45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55  *
56  * Effort sponsored in part by the Defense Advanced Research Projects
57  * Agency (DARPA) and Air Force Research Laboratory, Air Force
58  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
59  *
60  */
61 
62 #ifndef _CRYPTO_CRYPTO_H_
63 #define _CRYPTO_CRYPTO_H_
64 
65 #include <sys/ioccom.h>
66 
67 /* Some initial values */
68 #define CRYPTO_DRIVERS_INITIAL	4
69 #define CRYPTO_SW_SESSIONS	32
70 
71 /* Hash values */
72 #define	NULL_HASH_LEN		16
73 #define	MD5_HASH_LEN		16
74 #define	SHA1_HASH_LEN		20
75 #define	RIPEMD160_HASH_LEN	20
76 #define	SHA2_256_HASH_LEN	32
77 #define	SHA2_384_HASH_LEN	48
78 #define	SHA2_512_HASH_LEN	64
79 #define	MD5_KPDK_HASH_LEN	16
80 #define	SHA1_KPDK_HASH_LEN	20
81 #define	AES_GMAC_HASH_LEN	16
82 /* Maximum hash algorithm result length */
83 #define	HASH_MAX_LEN		SHA2_512_HASH_LEN /* Keep this updated */
84 
85 /* HMAC values */
86 #define	NULL_HMAC_BLOCK_LEN		64
87 #define	MD5_HMAC_BLOCK_LEN		64
88 #define	SHA1_HMAC_BLOCK_LEN		64
89 #define	RIPEMD160_HMAC_BLOCK_LEN	64
90 #define	SHA2_256_HMAC_BLOCK_LEN	64
91 #define	SHA2_384_HMAC_BLOCK_LEN	128
92 #define	SHA2_512_HMAC_BLOCK_LEN	128
93 /* Maximum HMAC block length */
94 #define	HMAC_MAX_BLOCK_LEN	SHA2_512_HMAC_BLOCK_LEN /* Keep this updated */
95 #define	HMAC_IPAD_VAL			0x36
96 #define	HMAC_OPAD_VAL			0x5C
97 /* HMAC Key Length */
98 #define	NULL_HMAC_KEY_LEN		0
99 #define	MD5_HMAC_KEY_LEN		16
100 #define	SHA1_HMAC_KEY_LEN		20
101 #define	RIPEMD160_HMAC_KEY_LEN		20
102 #define	SHA2_256_HMAC_KEY_LEN		32
103 #define	SHA2_384_HMAC_KEY_LEN		48
104 #define	SHA2_512_HMAC_KEY_LEN		64
105 #define	AES_128_GMAC_KEY_LEN		16
106 #define	AES_192_GMAC_KEY_LEN		24
107 #define	AES_256_GMAC_KEY_LEN		32
108 
109 /* Encryption algorithm block sizes */
110 #define	NULL_BLOCK_LEN		4	/* IPsec to maintain alignment */
111 #define	DES_BLOCK_LEN		8
112 #define	DES3_BLOCK_LEN		8
113 #define	BLOWFISH_BLOCK_LEN	8
114 #define	SKIPJACK_BLOCK_LEN	8
115 #define	CAST128_BLOCK_LEN	8
116 #define	RIJNDAEL128_BLOCK_LEN	16
117 #define	AES_BLOCK_LEN		16
118 #define	AES_ICM_BLOCK_LEN	1
119 #define	ARC4_BLOCK_LEN		1
120 #define	CAMELLIA_BLOCK_LEN	16
121 #define	EALG_MAX_BLOCK_LEN	AES_BLOCK_LEN /* Keep this updated */
122 
123 /* IV Lengths */
124 
125 #define	ARC4_IV_LEN		1
126 #define	AES_GCM_IV_LEN		12
127 #define	AES_XTS_IV_LEN		8
128 #define	AES_XTS_ALPHA		0x87	/* GF(2^128) generator polynomial */
129 
130 /* Min and Max Encryption Key Sizes */
131 #define	NULL_MIN_KEY		0
132 #define	NULL_MAX_KEY		256 /* 2048 bits, max key */
133 #define	DES_MIN_KEY		8
134 #define	DES_MAX_KEY		DES_MIN_KEY
135 #define	TRIPLE_DES_MIN_KEY	24
136 #define	TRIPLE_DES_MAX_KEY	TRIPLE_DES_MIN_KEY
137 #define	BLOWFISH_MIN_KEY	5
138 #define	BLOWFISH_MAX_KEY	56 /* 448 bits, max key */
139 #define	CAST_MIN_KEY		5
140 #define	CAST_MAX_KEY		16
141 #define	SKIPJACK_MIN_KEY	10
142 #define	SKIPJACK_MAX_KEY	SKIPJACK_MIN_KEY
143 #define	RIJNDAEL_MIN_KEY	16
144 #define	RIJNDAEL_MAX_KEY	32
145 #define	AES_MIN_KEY		RIJNDAEL_MIN_KEY
146 #define	AES_MAX_KEY		RIJNDAEL_MAX_KEY
147 #define	AES_XTS_MIN_KEY		(2 * AES_MIN_KEY)
148 #define	AES_XTS_MAX_KEY		(2 * AES_MAX_KEY)
149 #define	ARC4_MIN_KEY		1
150 #define	ARC4_MAX_KEY		32
151 #define	CAMELLIA_MIN_KEY	8
152 #define	CAMELLIA_MAX_KEY	32
153 
154 /* Maximum hash algorithm result length */
155 #define	AALG_MAX_RESULT_LEN	64 /* Keep this updated */
156 
157 #define	CRYPTO_ALGORITHM_MIN	1
158 #define	CRYPTO_DES_CBC		1
159 #define	CRYPTO_3DES_CBC		2
160 #define	CRYPTO_BLF_CBC		3
161 #define	CRYPTO_CAST_CBC		4
162 #define	CRYPTO_SKIPJACK_CBC	5
163 #define	CRYPTO_MD5_HMAC		6
164 #define	CRYPTO_SHA1_HMAC	7
165 #define	CRYPTO_RIPEMD160_HMAC	8
166 #define	CRYPTO_MD5_KPDK		9
167 #define	CRYPTO_SHA1_KPDK	10
168 #define	CRYPTO_RIJNDAEL128_CBC	11 /* 128 bit blocksize */
169 #define	CRYPTO_AES_CBC		11 /* 128 bit blocksize -- the same as above */
170 #define	CRYPTO_ARC4		12
171 #define	CRYPTO_MD5		13
172 #define	CRYPTO_SHA1		14
173 #define	CRYPTO_NULL_HMAC	15
174 #define	CRYPTO_NULL_CBC		16
175 #define	CRYPTO_DEFLATE_COMP	17 /* Deflate compression algorithm */
176 #define	CRYPTO_SHA2_256_HMAC	18
177 #define	CRYPTO_SHA2_384_HMAC	19
178 #define	CRYPTO_SHA2_512_HMAC	20
179 #define	CRYPTO_CAMELLIA_CBC	21
180 #define	CRYPTO_AES_XTS		22
181 #define	CRYPTO_AES_ICM		23 /* commonly known as CTR mode */
182 #define	CRYPTO_AES_NIST_GMAC	24 /* cipher side */
183 #define	CRYPTO_AES_NIST_GCM_16	25 /* 16 byte ICV */
184 #define	CRYPTO_AES_128_NIST_GMAC 26 /* auth side */
185 #define	CRYPTO_AES_192_NIST_GMAC 27 /* auth side */
186 #define	CRYPTO_AES_256_NIST_GMAC 28 /* auth side */
187 #define	CRYPTO_ALGORITHM_MAX	28 /* Keep updated - see below */
188 
189 #define	CRYPTO_ALGO_VALID(x)	((x) >= CRYPTO_ALGORITHM_MIN && \
190 				 (x) <= CRYPTO_ALGORITHM_MAX)
191 
192 /* Algorithm flags */
193 #define	CRYPTO_ALG_FLAG_SUPPORTED	0x01 /* Algorithm is supported */
194 #define	CRYPTO_ALG_FLAG_RNG_ENABLE	0x02 /* Has HW RNG for DH/DSA */
195 #define	CRYPTO_ALG_FLAG_DSA_SHA		0x04 /* Can do SHA on msg */
196 
197 /*
198  * Crypto driver/device flags.  They can set in the crid
199  * parameter when creating a session or submitting a key
200  * op to affect the device/driver assigned.  If neither
201  * of these are specified then the crid is assumed to hold
202  * the driver id of an existing (and suitable) device that
203  * must be used to satisfy the request.
204  */
205 #define CRYPTO_FLAG_HARDWARE	0x01000000	/* hardware accelerated */
206 #define CRYPTO_FLAG_SOFTWARE	0x02000000	/* software implementation */
207 
208 /* NB: deprecated */
209 struct session_op {
210 	u_int32_t	cipher;		/* ie. CRYPTO_DES_CBC */
211 	u_int32_t	mac;		/* ie. CRYPTO_MD5_HMAC */
212 
213 	u_int32_t	keylen;		/* cipher key */
214 	c_caddr_t	key;
215 	int		mackeylen;	/* mac key */
216 	c_caddr_t	mackey;
217 
218   	u_int32_t	ses;		/* returns: session # */
219 };
220 
221 struct session2_op {
222 	u_int32_t	cipher;		/* ie. CRYPTO_DES_CBC */
223 	u_int32_t	mac;		/* ie. CRYPTO_MD5_HMAC */
224 
225 	u_int32_t	keylen;		/* cipher key */
226 	c_caddr_t	key;
227 	int		mackeylen;	/* mac key */
228 	c_caddr_t	mackey;
229 
230   	u_int32_t	ses;		/* returns: session # */
231 	int		crid;		/* driver id + flags (rw) */
232 	int		pad[4];		/* for future expansion */
233 };
234 
235 struct crypt_op {
236 	u_int32_t	ses;
237 	u_int16_t	op;		/* i.e. COP_ENCRYPT */
238 #define COP_ENCRYPT	1
239 #define COP_DECRYPT	2
240 	u_int16_t	flags;
241 #define	COP_F_BATCH	0x0008		/* Batch op if possible */
242 	u_int		len;
243 	c_caddr_t	src;		/* become iov[] inside kernel */
244 	caddr_t		dst;
245 	caddr_t		mac;		/* must be big enough for chosen MAC */
246 	c_caddr_t	iv;
247 };
248 
249 /* op and flags the same as crypt_op */
250 struct crypt_aead {
251 	u_int32_t	ses;
252 	u_int16_t	op;		/* i.e. COP_ENCRYPT */
253 	u_int16_t	flags;
254 	u_int		len;
255 	u_int		aadlen;
256 	u_int		ivlen;
257 	c_caddr_t	src;		/* become iov[] inside kernel */
258 	caddr_t		dst;
259 	c_caddr_t	aad;		/* additional authenticated data */
260 	caddr_t		tag;		/* must fit for chosen TAG length */
261 	c_caddr_t	iv;
262 };
263 
264 /*
265  * Parameters for looking up a crypto driver/device by
266  * device name or by id.  The latter are returned for
267  * created sessions (crid) and completed key operations.
268  */
269 struct crypt_find_op {
270 	int		crid;		/* driver id + flags */
271 	char		name[32];	/* device/driver name */
272 };
273 
274 /* bignum parameter, in packed bytes, ... */
275 struct crparam {
276 	caddr_t		crp_p;
277 	u_int		crp_nbits;
278 };
279 
280 #define CRK_MAXPARAM	8
281 
282 struct crypt_kop {
283 	u_int		crk_op;		/* ie. CRK_MOD_EXP or other */
284 	u_int		crk_status;	/* return status */
285 	u_short		crk_iparams;	/* # of input parameters */
286 	u_short		crk_oparams;	/* # of output parameters */
287 	u_int		crk_crid;	/* NB: only used by CIOCKEY2 (rw) */
288 	struct crparam	crk_param[CRK_MAXPARAM];
289 };
290 #define	CRK_ALGORITM_MIN	0
291 #define CRK_MOD_EXP		0
292 #define CRK_MOD_EXP_CRT		1
293 #define CRK_DSA_SIGN		2
294 #define CRK_DSA_VERIFY		3
295 #define CRK_DH_COMPUTE_KEY	4
296 #define CRK_ALGORITHM_MAX	4 /* Keep updated - see below */
297 
298 #define CRF_MOD_EXP		(1 << CRK_MOD_EXP)
299 #define CRF_MOD_EXP_CRT		(1 << CRK_MOD_EXP_CRT)
300 #define CRF_DSA_SIGN		(1 << CRK_DSA_SIGN)
301 #define CRF_DSA_VERIFY		(1 << CRK_DSA_VERIFY)
302 #define CRF_DH_COMPUTE_KEY	(1 << CRK_DH_COMPUTE_KEY)
303 
304 /*
305  * done against open of /dev/crypto, to get a cloned descriptor.
306  * Please use F_SETFD against the cloned descriptor.
307  */
308 #define	CRIOGET		_IOWR('c', 100, u_int32_t)
309 #define	CRIOASYMFEAT	CIOCASYMFEAT
310 #define	CRIOFINDDEV	CIOCFINDDEV
311 
312 /* the following are done against the cloned descriptor */
313 #define	CIOCGSESSION	_IOWR('c', 101, struct session_op)
314 #define	CIOCFSESSION	_IOW('c', 102, u_int32_t)
315 #define CIOCCRYPT	_IOWR('c', 103, struct crypt_op)
316 #define CIOCKEY		_IOWR('c', 104, struct crypt_kop)
317 #define CIOCASYMFEAT	_IOR('c', 105, u_int32_t)
318 #define	CIOCGSESSION2	_IOWR('c', 106, struct session2_op)
319 #define	CIOCKEY2	_IOWR('c', 107, struct crypt_kop)
320 #define	CIOCFINDDEV	_IOWR('c', 108, struct crypt_find_op)
321 #define	CIOCCRYPTAEAD	_IOWR('c', 109, struct crypt_aead)
322 
323 struct cryptotstat {
324 	struct timespec	acc;		/* total accumulated time */
325 	struct timespec	min;		/* min time */
326 	struct timespec	max;		/* max time */
327 	u_int32_t	count;		/* number of observations */
328 };
329 
330 struct cryptostats {
331 	u_int32_t	cs_ops;		/* symmetric crypto ops submitted */
332 	u_int32_t	cs_errs;	/* symmetric crypto ops that failed */
333 	u_int32_t	cs_kops;	/* asymetric/key ops submitted */
334 	u_int32_t	cs_kerrs;	/* asymetric/key ops that failed */
335 	u_int32_t	cs_intrs;	/* crypto swi thread activations */
336 	u_int32_t	cs_rets;	/* crypto return thread activations */
337 	u_int32_t	cs_blocks;	/* symmetric op driver block */
338 	u_int32_t	cs_kblocks;	/* symmetric op driver block */
339 	/*
340 	 * When CRYPTO_TIMING is defined at compile time and the
341 	 * sysctl debug.crypto is set to 1, the crypto system will
342 	 * accumulate statistics about how long it takes to process
343 	 * crypto requests at various points during processing.
344 	 */
345 	struct cryptotstat cs_invoke;	/* crypto_dipsatch -> crypto_invoke */
346 	struct cryptotstat cs_done;	/* crypto_invoke -> crypto_done */
347 	struct cryptotstat cs_cb;	/* crypto_done -> callback */
348 	struct cryptotstat cs_finis;	/* callback -> callback return */
349 };
350 
351 #ifdef _KERNEL
352 
353 #if 0
354 #define CRYPTDEB(s)	do { printf("%s:%d: %s\n", __FILE__, __LINE__, s); \
355 			} while (0)
356 #else
357 #define CRYPTDEB(s)	do { } while (0)
358 #endif
359 
360 /* Standard initialization structure beginning */
361 struct cryptoini {
362 	int		cri_alg;	/* Algorithm to use */
363 	int		cri_klen;	/* Key length, in bits */
364 	int		cri_mlen;	/* Number of bytes we want from the
365 					   entire hash. 0 means all. */
366 	caddr_t		cri_key;	/* key to use */
367 	u_int8_t	cri_iv[EALG_MAX_BLOCK_LEN];	/* IV to use */
368 	struct cryptoini *cri_next;
369 };
370 
371 /* Describe boundaries of a single crypto operation */
372 struct cryptodesc {
373 	int		crd_skip;	/* How many bytes to ignore from start */
374 	int		crd_len;	/* How many bytes to process */
375 	int		crd_inject;	/* Where to inject results, if applicable */
376 	int		crd_flags;
377 
378 #define	CRD_F_ENCRYPT		0x01	/* Set when doing encryption */
379 #define	CRD_F_IV_PRESENT	0x02	/* When encrypting, IV is already in
380 					   place, so don't copy. */
381 #define	CRD_F_IV_EXPLICIT	0x04	/* IV explicitly provided */
382 #define	CRD_F_DSA_SHA_NEEDED	0x08	/* Compute SHA-1 of buffer for DSA */
383 #define	CRD_F_COMP		0x0f    /* Set when doing compression */
384 #define	CRD_F_KEY_EXPLICIT	0x10	/* Key explicitly provided */
385 
386 	struct cryptoini	CRD_INI; /* Initialization/context data */
387 #define	crd_esn		CRD_INI.cri_esn
388 #define	crd_iv		CRD_INI.cri_iv
389 #define	crd_key		CRD_INI.cri_key
390 #define	crd_alg		CRD_INI.cri_alg
391 #define	crd_klen	CRD_INI.cri_klen
392 
393 	struct cryptodesc *crd_next;
394 };
395 
396 /* Structure describing complete operation */
397 struct cryptop {
398 	TAILQ_ENTRY(cryptop) crp_next;
399 
400 	u_int64_t	crp_sid;	/* Session ID */
401 	int		crp_ilen;	/* Input data total length */
402 	int		crp_olen;	/* Result total length */
403 
404 	int		crp_etype;	/*
405 					 * Error type (zero means no error).
406 					 * All error codes except EAGAIN
407 					 * indicate possible data corruption (as in,
408 					 * the data have been touched). On all
409 					 * errors, the crp_sid may have changed
410 					 * (reset to a new one), so the caller
411 					 * should always check and use the new
412 					 * value on future requests.
413 					 */
414 	int		crp_flags;
415 
416 #define	CRYPTO_F_IMBUF		0x0001	/* Input/output are mbuf chains */
417 #define	CRYPTO_F_IOV		0x0002	/* Input/output are uio */
418 #define	CRYPTO_F_BATCH		0x0008	/* Batch op if possible */
419 #define	CRYPTO_F_CBIMM		0x0010	/* Do callback immediately */
420 #define	CRYPTO_F_DONE		0x0020	/* Operation completed */
421 #define	CRYPTO_F_CBIFSYNC	0x0040	/* Do CBIMM if op is synchronous */
422 
423 	caddr_t		crp_buf;	/* Data to be processed */
424 	caddr_t		crp_opaque;	/* Opaque pointer, passed along */
425 	struct cryptodesc *crp_desc;	/* Linked list of processing descriptors */
426 
427 	int (*crp_callback)(struct cryptop *); /* Callback function */
428 
429 	struct bintime	crp_tstamp;	/* performance time stamp */
430 };
431 
432 #define	CRYPTO_BUF_CONTIG	0x0
433 #define	CRYPTO_BUF_IOV		0x1
434 #define	CRYPTO_BUF_MBUF		0x2
435 
436 #define	CRYPTO_OP_DECRYPT	0x0
437 #define	CRYPTO_OP_ENCRYPT	0x1
438 
439 /*
440  * Hints passed to process methods.
441  */
442 #define	CRYPTO_HINT_MORE	0x1	/* more ops coming shortly */
443 
444 struct cryptkop {
445 	TAILQ_ENTRY(cryptkop) krp_next;
446 
447 	u_int		krp_op;		/* ie. CRK_MOD_EXP or other */
448 	u_int		krp_status;	/* return status */
449 	u_short		krp_iparams;	/* # of input parameters */
450 	u_short		krp_oparams;	/* # of output parameters */
451 	u_int		krp_crid;	/* desired device, etc. */
452 	u_int32_t	krp_hid;
453 	struct crparam	krp_param[CRK_MAXPARAM];	/* kvm */
454 	int		(*krp_callback)(struct cryptkop *);
455 };
456 
457 /*
458  * Session ids are 64 bits.  The lower 32 bits contain a "local id" which
459  * is a driver-private session identifier.  The upper 32 bits contain a
460  * "hardware id" used by the core crypto code to identify the driver and
461  * a copy of the driver's capabilities that can be used by client code to
462  * optimize operation.
463  */
464 #define	CRYPTO_SESID2HID(_sid)	(((_sid) >> 32) & 0x00ffffff)
465 #define	CRYPTO_SESID2CAPS(_sid)	(((_sid) >> 32) & 0xff000000)
466 #define	CRYPTO_SESID2LID(_sid)	(((u_int32_t) (_sid)) & 0xffffffff)
467 
468 MALLOC_DECLARE(M_CRYPTO_DATA);
469 
470 extern	int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
471 extern	int crypto_freesession(u_int64_t sid);
472 #define	CRYPTOCAP_F_HARDWARE	CRYPTO_FLAG_HARDWARE
473 #define	CRYPTOCAP_F_SOFTWARE	CRYPTO_FLAG_SOFTWARE
474 #define	CRYPTOCAP_F_SYNC	0x04000000	/* operates synchronously */
475 extern	int32_t crypto_get_driverid(device_t dev, int flags);
476 extern	int crypto_find_driver(const char *);
477 extern	device_t crypto_find_device_byhid(int hid);
478 extern	int crypto_getcaps(int hid);
479 extern	int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
480 	    u_int32_t flags);
481 extern	int crypto_kregister(u_int32_t, int, u_int32_t);
482 extern	int crypto_unregister(u_int32_t driverid, int alg);
483 extern	int crypto_unregister_all(u_int32_t driverid);
484 extern	int crypto_dispatch(struct cryptop *crp);
485 extern	int crypto_kdispatch(struct cryptkop *);
486 #define	CRYPTO_SYMQ	0x1
487 #define	CRYPTO_ASYMQ	0x2
488 extern	int crypto_unblock(u_int32_t, int);
489 extern	void crypto_done(struct cryptop *crp);
490 extern	void crypto_kdone(struct cryptkop *);
491 extern	int crypto_getfeat(int *);
492 
493 extern	void crypto_freereq(struct cryptop *crp);
494 extern	struct cryptop *crypto_getreq(int num);
495 
496 extern	int crypto_usercrypto;		/* userland may do crypto requests */
497 extern	int crypto_userasymcrypto;	/* userland may do asym crypto reqs */
498 extern	int crypto_devallowsoft;	/* only use hardware crypto */
499 
500 /*
501  * Crypto-related utility routines used mainly by drivers.
502  *
503  * XXX these don't really belong here; but for now they're
504  *     kept apart from the rest of the system.
505  */
506 struct uio;
507 extern	void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
508 extern	void cuio_copyback(struct uio* uio, int off, int len, c_caddr_t cp);
509 extern	int cuio_getptr(struct uio *uio, int loc, int *off);
510 extern	int cuio_apply(struct uio *uio, int off, int len,
511 	    int (*f)(void *, void *, u_int), void *arg);
512 
513 struct mbuf;
514 struct iovec;
515 extern	int crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr,
516 	    int *cnt, int *allocated);
517 
518 extern	void crypto_copyback(int flags, caddr_t buf, int off, int size,
519 	    c_caddr_t in);
520 extern	void crypto_copydata(int flags, caddr_t buf, int off, int size,
521 	    caddr_t out);
522 extern	int crypto_apply(int flags, caddr_t buf, int off, int len,
523 	    int (*f)(void *, void *, u_int), void *arg);
524 #endif /* _KERNEL */
525 #endif /* _CRYPTO_CRYPTO_H_ */
526