xref: /freebsd/sys/opencrypto/cryptodev.h (revision 190cef3d52236565eb22e18b33e9e865ec634aa3)
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 #include <sys/_task.h>
67 
68 #ifdef _KERNEL
69 #include <opencrypto/_cryptodev.h>
70 #endif
71 
72 /* Some initial values */
73 #define CRYPTO_DRIVERS_INITIAL	4
74 #define CRYPTO_SW_SESSIONS	32
75 
76 /* Hash values */
77 #define	NULL_HASH_LEN		16
78 #define	MD5_HASH_LEN		16
79 #define	SHA1_HASH_LEN		20
80 #define	RIPEMD160_HASH_LEN	20
81 #define	SHA2_224_HASH_LEN	28
82 #define	SHA2_256_HASH_LEN	32
83 #define	SHA2_384_HASH_LEN	48
84 #define	SHA2_512_HASH_LEN	64
85 #define	MD5_KPDK_HASH_LEN	16
86 #define	SHA1_KPDK_HASH_LEN	20
87 #define	AES_GMAC_HASH_LEN	16
88 #define	POLY1305_HASH_LEN	16
89 /* Maximum hash algorithm result length */
90 #define	HASH_MAX_LEN		SHA2_512_HASH_LEN /* Keep this updated */
91 
92 #define	MD5_BLOCK_LEN		64
93 #define	SHA1_BLOCK_LEN		64
94 #define	RIPEMD160_BLOCK_LEN	64
95 #define	SHA2_224_BLOCK_LEN	64
96 #define	SHA2_256_BLOCK_LEN	64
97 #define	SHA2_384_BLOCK_LEN	128
98 #define	SHA2_512_BLOCK_LEN	128
99 
100 /* HMAC values */
101 #define	NULL_HMAC_BLOCK_LEN		64
102 /* Maximum HMAC block length */
103 #define	HMAC_MAX_BLOCK_LEN	SHA2_512_BLOCK_LEN /* Keep this updated */
104 #define	HMAC_IPAD_VAL			0x36
105 #define	HMAC_OPAD_VAL			0x5C
106 /* HMAC Key Length */
107 #define	AES_128_GMAC_KEY_LEN		16
108 #define	AES_192_GMAC_KEY_LEN		24
109 #define	AES_256_GMAC_KEY_LEN		32
110 
111 #define	POLY1305_KEY_LEN		32
112 
113 /* Encryption algorithm block sizes */
114 #define	NULL_BLOCK_LEN		4	/* IPsec to maintain alignment */
115 #define	DES_BLOCK_LEN		8
116 #define	DES3_BLOCK_LEN		8
117 #define	BLOWFISH_BLOCK_LEN	8
118 #define	SKIPJACK_BLOCK_LEN	8
119 #define	CAST128_BLOCK_LEN	8
120 #define	RIJNDAEL128_BLOCK_LEN	16
121 #define	AES_BLOCK_LEN		16
122 #define	AES_ICM_BLOCK_LEN	1
123 #define	ARC4_BLOCK_LEN		1
124 #define	CAMELLIA_BLOCK_LEN	16
125 #define	CHACHA20_NATIVE_BLOCK_LEN	64
126 #define	EALG_MAX_BLOCK_LEN	CHACHA20_NATIVE_BLOCK_LEN /* Keep this updated */
127 
128 /* IV Lengths */
129 
130 #define	ARC4_IV_LEN		1
131 #define	AES_GCM_IV_LEN		12
132 #define	AES_XTS_IV_LEN		8
133 #define	AES_XTS_ALPHA		0x87	/* GF(2^128) generator polynomial */
134 
135 /* Min and Max Encryption Key Sizes */
136 #define	NULL_MIN_KEY		0
137 #define	NULL_MAX_KEY		256 /* 2048 bits, max key */
138 #define	DES_MIN_KEY		8
139 #define	DES_MAX_KEY		DES_MIN_KEY
140 #define	TRIPLE_DES_MIN_KEY	24
141 #define	TRIPLE_DES_MAX_KEY	TRIPLE_DES_MIN_KEY
142 #define	BLOWFISH_MIN_KEY	5
143 #define	BLOWFISH_MAX_KEY	56 /* 448 bits, max key */
144 #define	CAST_MIN_KEY		5
145 #define	CAST_MAX_KEY		16
146 #define	SKIPJACK_MIN_KEY	10
147 #define	SKIPJACK_MAX_KEY	SKIPJACK_MIN_KEY
148 #define	RIJNDAEL_MIN_KEY	16
149 #define	RIJNDAEL_MAX_KEY	32
150 #define	AES_MIN_KEY		RIJNDAEL_MIN_KEY
151 #define	AES_MAX_KEY		RIJNDAEL_MAX_KEY
152 #define	AES_XTS_MIN_KEY		(2 * AES_MIN_KEY)
153 #define	AES_XTS_MAX_KEY		(2 * AES_MAX_KEY)
154 #define	ARC4_MIN_KEY		1
155 #define	ARC4_MAX_KEY		32
156 #define	CAMELLIA_MIN_KEY	8
157 #define	CAMELLIA_MAX_KEY	32
158 
159 /* Maximum hash algorithm result length */
160 #define	AALG_MAX_RESULT_LEN	64 /* Keep this updated */
161 
162 #define	CRYPTO_ALGORITHM_MIN	1
163 #define	CRYPTO_DES_CBC		1
164 #define	CRYPTO_3DES_CBC		2
165 #define	CRYPTO_BLF_CBC		3
166 #define	CRYPTO_CAST_CBC		4
167 #define	CRYPTO_SKIPJACK_CBC	5
168 #define	CRYPTO_MD5_HMAC		6
169 #define	CRYPTO_SHA1_HMAC	7
170 #define	CRYPTO_RIPEMD160_HMAC	8
171 #define	CRYPTO_MD5_KPDK		9
172 #define	CRYPTO_SHA1_KPDK	10
173 #define	CRYPTO_RIJNDAEL128_CBC	11 /* 128 bit blocksize */
174 #define	CRYPTO_AES_CBC		11 /* 128 bit blocksize -- the same as above */
175 #define	CRYPTO_ARC4		12
176 #define	CRYPTO_MD5		13
177 #define	CRYPTO_SHA1		14
178 #define	CRYPTO_NULL_HMAC	15
179 #define	CRYPTO_NULL_CBC		16
180 #define	CRYPTO_DEFLATE_COMP	17 /* Deflate compression algorithm */
181 #define	CRYPTO_SHA2_256_HMAC	18
182 #define	CRYPTO_SHA2_384_HMAC	19
183 #define	CRYPTO_SHA2_512_HMAC	20
184 #define	CRYPTO_CAMELLIA_CBC	21
185 #define	CRYPTO_AES_XTS		22
186 #define	CRYPTO_AES_ICM		23 /* commonly known as CTR mode */
187 #define	CRYPTO_AES_NIST_GMAC	24 /* cipher side */
188 #define	CRYPTO_AES_NIST_GCM_16	25 /* 16 byte ICV */
189 #define	CRYPTO_AES_128_NIST_GMAC 26 /* auth side */
190 #define	CRYPTO_AES_192_NIST_GMAC 27 /* auth side */
191 #define	CRYPTO_AES_256_NIST_GMAC 28 /* auth side */
192 #define	CRYPTO_BLAKE2B		29 /* Blake2b hash */
193 #define	CRYPTO_BLAKE2S		30 /* Blake2s hash */
194 #define	CRYPTO_CHACHA20		31 /* Chacha20 stream cipher */
195 #define	CRYPTO_SHA2_224_HMAC	32
196 #define	CRYPTO_RIPEMD160	33
197 #define	CRYPTO_SHA2_224		34
198 #define	CRYPTO_SHA2_256		35
199 #define	CRYPTO_SHA2_384		36
200 #define	CRYPTO_SHA2_512		37
201 #define	CRYPTO_POLY1305		38
202 #define	CRYPTO_ALGORITHM_MAX	38 /* Keep updated - see below */
203 
204 #define	CRYPTO_ALGO_VALID(x)	((x) >= CRYPTO_ALGORITHM_MIN && \
205 				 (x) <= CRYPTO_ALGORITHM_MAX)
206 
207 /* Algorithm flags */
208 #define	CRYPTO_ALG_FLAG_SUPPORTED	0x01 /* Algorithm is supported */
209 #define	CRYPTO_ALG_FLAG_RNG_ENABLE	0x02 /* Has HW RNG for DH/DSA */
210 #define	CRYPTO_ALG_FLAG_DSA_SHA		0x04 /* Can do SHA on msg */
211 
212 /*
213  * Crypto driver/device flags.  They can set in the crid
214  * parameter when creating a session or submitting a key
215  * op to affect the device/driver assigned.  If neither
216  * of these are specified then the crid is assumed to hold
217  * the driver id of an existing (and suitable) device that
218  * must be used to satisfy the request.
219  */
220 #define CRYPTO_FLAG_HARDWARE	0x01000000	/* hardware accelerated */
221 #define CRYPTO_FLAG_SOFTWARE	0x02000000	/* software implementation */
222 
223 /* NB: deprecated */
224 struct session_op {
225 	u_int32_t	cipher;		/* ie. CRYPTO_DES_CBC */
226 	u_int32_t	mac;		/* ie. CRYPTO_MD5_HMAC */
227 
228 	u_int32_t	keylen;		/* cipher key */
229 	c_caddr_t	key;
230 	int		mackeylen;	/* mac key */
231 	c_caddr_t	mackey;
232 
233   	u_int32_t	ses;		/* returns: session # */
234 };
235 
236 /*
237  * session and crypt _op structs are used by userspace programs to interact
238  * with /dev/crypto.  Confusingly, the internal kernel interface is named
239  * "cryptop" (no underscore).
240  */
241 struct session2_op {
242 	u_int32_t	cipher;		/* ie. CRYPTO_DES_CBC */
243 	u_int32_t	mac;		/* ie. CRYPTO_MD5_HMAC */
244 
245 	u_int32_t	keylen;		/* cipher key */
246 	c_caddr_t	key;
247 	int		mackeylen;	/* mac key */
248 	c_caddr_t	mackey;
249 
250   	u_int32_t	ses;		/* returns: session # */
251 	int		crid;		/* driver id + flags (rw) */
252 	int		pad[4];		/* for future expansion */
253 };
254 
255 struct crypt_op {
256 	u_int32_t	ses;
257 	u_int16_t	op;		/* i.e. COP_ENCRYPT */
258 #define COP_ENCRYPT	1
259 #define COP_DECRYPT	2
260 	u_int16_t	flags;
261 #define	COP_F_CIPHER_FIRST	0x0001	/* Cipher before MAC. */
262 #define	COP_F_BATCH		0x0008	/* Batch op if possible */
263 	u_int		len;
264 	c_caddr_t	src;		/* become iov[] inside kernel */
265 	caddr_t		dst;
266 	caddr_t		mac;		/* must be big enough for chosen MAC */
267 	c_caddr_t	iv;
268 };
269 
270 /* op and flags the same as crypt_op */
271 struct crypt_aead {
272 	u_int32_t	ses;
273 	u_int16_t	op;		/* i.e. COP_ENCRYPT */
274 	u_int16_t	flags;
275 	u_int		len;
276 	u_int		aadlen;
277 	u_int		ivlen;
278 	c_caddr_t	src;		/* become iov[] inside kernel */
279 	caddr_t		dst;
280 	c_caddr_t	aad;		/* additional authenticated data */
281 	caddr_t		tag;		/* must fit for chosen TAG length */
282 	c_caddr_t	iv;
283 };
284 
285 /*
286  * Parameters for looking up a crypto driver/device by
287  * device name or by id.  The latter are returned for
288  * created sessions (crid) and completed key operations.
289  */
290 struct crypt_find_op {
291 	int		crid;		/* driver id + flags */
292 	char		name[32];	/* device/driver name */
293 };
294 
295 /* bignum parameter, in packed bytes, ... */
296 struct crparam {
297 	caddr_t		crp_p;
298 	u_int		crp_nbits;
299 };
300 
301 #define CRK_MAXPARAM	8
302 
303 struct crypt_kop {
304 	u_int		crk_op;		/* ie. CRK_MOD_EXP or other */
305 	u_int		crk_status;	/* return status */
306 	u_short		crk_iparams;	/* # of input parameters */
307 	u_short		crk_oparams;	/* # of output parameters */
308 	u_int		crk_crid;	/* NB: only used by CIOCKEY2 (rw) */
309 	struct crparam	crk_param[CRK_MAXPARAM];
310 };
311 #define	CRK_ALGORITM_MIN	0
312 #define CRK_MOD_EXP		0
313 #define CRK_MOD_EXP_CRT		1
314 #define CRK_DSA_SIGN		2
315 #define CRK_DSA_VERIFY		3
316 #define CRK_DH_COMPUTE_KEY	4
317 #define CRK_ALGORITHM_MAX	4 /* Keep updated - see below */
318 
319 #define CRF_MOD_EXP		(1 << CRK_MOD_EXP)
320 #define CRF_MOD_EXP_CRT		(1 << CRK_MOD_EXP_CRT)
321 #define CRF_DSA_SIGN		(1 << CRK_DSA_SIGN)
322 #define CRF_DSA_VERIFY		(1 << CRK_DSA_VERIFY)
323 #define CRF_DH_COMPUTE_KEY	(1 << CRK_DH_COMPUTE_KEY)
324 
325 /*
326  * done against open of /dev/crypto, to get a cloned descriptor.
327  * Please use F_SETFD against the cloned descriptor.
328  */
329 #define	CRIOGET		_IOWR('c', 100, u_int32_t)
330 #define	CRIOASYMFEAT	CIOCASYMFEAT
331 #define	CRIOFINDDEV	CIOCFINDDEV
332 
333 /* the following are done against the cloned descriptor */
334 #define	CIOCGSESSION	_IOWR('c', 101, struct session_op)
335 #define	CIOCFSESSION	_IOW('c', 102, u_int32_t)
336 #define CIOCCRYPT	_IOWR('c', 103, struct crypt_op)
337 #define CIOCKEY		_IOWR('c', 104, struct crypt_kop)
338 #define CIOCASYMFEAT	_IOR('c', 105, u_int32_t)
339 #define	CIOCGSESSION2	_IOWR('c', 106, struct session2_op)
340 #define	CIOCKEY2	_IOWR('c', 107, struct crypt_kop)
341 #define	CIOCFINDDEV	_IOWR('c', 108, struct crypt_find_op)
342 #define	CIOCCRYPTAEAD	_IOWR('c', 109, struct crypt_aead)
343 
344 struct cryptotstat {
345 	struct timespec	acc;		/* total accumulated time */
346 	struct timespec	min;		/* min time */
347 	struct timespec	max;		/* max time */
348 	u_int32_t	count;		/* number of observations */
349 };
350 
351 struct cryptostats {
352 	u_int32_t	cs_ops;		/* symmetric crypto ops submitted */
353 	u_int32_t	cs_errs;	/* symmetric crypto ops that failed */
354 	u_int32_t	cs_kops;	/* asymetric/key ops submitted */
355 	u_int32_t	cs_kerrs;	/* asymetric/key ops that failed */
356 	u_int32_t	cs_intrs;	/* crypto swi thread activations */
357 	u_int32_t	cs_rets;	/* crypto return thread activations */
358 	u_int32_t	cs_blocks;	/* symmetric op driver block */
359 	u_int32_t	cs_kblocks;	/* symmetric op driver block */
360 	/*
361 	 * When CRYPTO_TIMING is defined at compile time and the
362 	 * sysctl debug.crypto is set to 1, the crypto system will
363 	 * accumulate statistics about how long it takes to process
364 	 * crypto requests at various points during processing.
365 	 */
366 	struct cryptotstat cs_invoke;	/* crypto_dipsatch -> crypto_invoke */
367 	struct cryptotstat cs_done;	/* crypto_invoke -> crypto_done */
368 	struct cryptotstat cs_cb;	/* crypto_done -> callback */
369 	struct cryptotstat cs_finis;	/* callback -> callback return */
370 };
371 
372 #ifdef _KERNEL
373 
374 #if 0
375 #define CRYPTDEB(s, ...) do {						\
376 	printf("%s:%d: " s "\n", __FILE__, __LINE__, ## __VA_ARGS__);	\
377 } while (0)
378 #else
379 #define CRYPTDEB(...)	do { } while (0)
380 #endif
381 
382 /* Standard initialization structure beginning */
383 struct cryptoini {
384 	int		cri_alg;	/* Algorithm to use */
385 	int		cri_klen;	/* Key length, in bits */
386 	int		cri_mlen;	/* Number of bytes we want from the
387 					   entire hash. 0 means all. */
388 	caddr_t		cri_key;	/* key to use */
389 	u_int8_t	cri_iv[EALG_MAX_BLOCK_LEN];	/* IV to use */
390 	struct cryptoini *cri_next;
391 };
392 
393 /* Describe boundaries of a single crypto operation */
394 struct cryptodesc {
395 	int		crd_skip;	/* How many bytes to ignore from start */
396 	int		crd_len;	/* How many bytes to process */
397 	int		crd_inject;	/* Where to inject results, if applicable */
398 	int		crd_flags;
399 
400 #define	CRD_F_ENCRYPT		0x01	/* Set when doing encryption */
401 #define	CRD_F_IV_PRESENT	0x02	/* When encrypting, IV is already in
402 					   place, so don't copy. */
403 #define	CRD_F_IV_EXPLICIT	0x04	/* IV explicitly provided */
404 #define	CRD_F_DSA_SHA_NEEDED	0x08	/* Compute SHA-1 of buffer for DSA */
405 #define	CRD_F_COMP		0x0f    /* Set when doing compression */
406 #define	CRD_F_KEY_EXPLICIT	0x10	/* Key explicitly provided */
407 
408 	struct cryptoini	CRD_INI; /* Initialization/context data */
409 #define	crd_esn		CRD_INI.cri_esn
410 #define	crd_iv		CRD_INI.cri_iv
411 #define	crd_key		CRD_INI.cri_key
412 #define	crd_alg		CRD_INI.cri_alg
413 #define	crd_klen	CRD_INI.cri_klen
414 
415 	struct cryptodesc *crd_next;
416 };
417 
418 /* Structure describing complete operation */
419 struct cryptop {
420 	TAILQ_ENTRY(cryptop) crp_next;
421 
422 	struct task	crp_task;
423 
424 	crypto_session_t crp_session;	/* Session */
425 	int		crp_ilen;	/* Input data total length */
426 	int		crp_olen;	/* Result total length */
427 
428 	int		crp_etype;	/*
429 					 * Error type (zero means no error).
430 					 * All error codes except EAGAIN
431 					 * indicate possible data corruption (as in,
432 					 * the data have been touched). On all
433 					 * errors, the crp_session may have changed
434 					 * (reset to a new one), so the caller
435 					 * should always check and use the new
436 					 * value on future requests.
437 					 */
438 	int		crp_flags;
439 
440 #define	CRYPTO_F_IMBUF		0x0001	/* Input/output are mbuf chains */
441 #define	CRYPTO_F_IOV		0x0002	/* Input/output are uio */
442 #define	CRYPTO_F_BATCH		0x0008	/* Batch op if possible */
443 #define	CRYPTO_F_CBIMM		0x0010	/* Do callback immediately */
444 #define	CRYPTO_F_DONE		0x0020	/* Operation completed */
445 #define	CRYPTO_F_CBIFSYNC	0x0040	/* Do CBIMM if op is synchronous */
446 #define	CRYPTO_F_ASYNC		0x0080	/* Dispatch crypto jobs on several threads
447 					 * if op is synchronous
448 					 */
449 #define	CRYPTO_F_ASYNC_KEEPORDER	0x0100	/*
450 					 * Dispatch the crypto jobs in the same
451 					 * order there are submitted. Applied only
452 					 * if CRYPTO_F_ASYNC flags is set
453 					 */
454 
455 	union {
456 		caddr_t		crp_buf;	/* Data to be processed */
457 		struct mbuf	*crp_mbuf;
458 		struct uio	*crp_uio;
459 	};
460 	void *		crp_opaque;	/* Opaque pointer, passed along */
461 	struct cryptodesc *crp_desc;	/* Linked list of processing descriptors */
462 
463 	int (*crp_callback)(struct cryptop *); /* Callback function */
464 
465 	struct bintime	crp_tstamp;	/* performance time stamp */
466 	uint32_t	crp_seq;	/* used for ordered dispatch */
467 	uint32_t	crp_retw_id;	/*
468 					 * the return worker to be used,
469 					 *  used for ordered dispatch
470 					 */
471 };
472 
473 #define	CRYPTOP_ASYNC(crp) \
474 	(((crp)->crp_flags & CRYPTO_F_ASYNC) && \
475 	crypto_ses2caps((crp)->crp_session) & CRYPTOCAP_F_SYNC)
476 #define	CRYPTOP_ASYNC_KEEPORDER(crp) \
477 	(CRYPTOP_ASYNC(crp) && \
478 	(crp)->crp_flags & CRYPTO_F_ASYNC_KEEPORDER)
479 
480 #define	CRYPTO_BUF_CONTIG	0x0
481 #define	CRYPTO_BUF_IOV		0x1
482 #define	CRYPTO_BUF_MBUF		0x2
483 
484 #define	CRYPTO_OP_DECRYPT	0x0
485 #define	CRYPTO_OP_ENCRYPT	0x1
486 
487 /*
488  * Hints passed to process methods.
489  */
490 #define	CRYPTO_HINT_MORE	0x1	/* more ops coming shortly */
491 
492 struct cryptkop {
493 	TAILQ_ENTRY(cryptkop) krp_next;
494 
495 	u_int		krp_op;		/* ie. CRK_MOD_EXP or other */
496 	u_int		krp_status;	/* return status */
497 	u_short		krp_iparams;	/* # of input parameters */
498 	u_short		krp_oparams;	/* # of output parameters */
499 	u_int		krp_crid;	/* desired device, etc. */
500 	u_int32_t	krp_hid;
501 	struct crparam	krp_param[CRK_MAXPARAM];	/* kvm */
502 	int		(*krp_callback)(struct cryptkop *);
503 };
504 
505 uint32_t crypto_ses2hid(crypto_session_t crypto_session);
506 uint32_t crypto_ses2caps(crypto_session_t crypto_session);
507 void *crypto_get_driver_session(crypto_session_t crypto_session);
508 
509 MALLOC_DECLARE(M_CRYPTO_DATA);
510 
511 extern	int crypto_newsession(crypto_session_t *cses, struct cryptoini *cri, int hard);
512 extern	void crypto_freesession(crypto_session_t cses);
513 #define	CRYPTOCAP_F_HARDWARE	CRYPTO_FLAG_HARDWARE
514 #define	CRYPTOCAP_F_SOFTWARE	CRYPTO_FLAG_SOFTWARE
515 #define	CRYPTOCAP_F_SYNC	0x04000000	/* operates synchronously */
516 extern	int32_t crypto_get_driverid(device_t dev, size_t session_size,
517     int flags);
518 extern	int crypto_find_driver(const char *);
519 extern	device_t crypto_find_device_byhid(int hid);
520 extern	int crypto_getcaps(int hid);
521 extern	int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
522 	    u_int32_t flags);
523 extern	int crypto_kregister(u_int32_t, int, u_int32_t);
524 extern	int crypto_unregister(u_int32_t driverid, int alg);
525 extern	int crypto_unregister_all(u_int32_t driverid);
526 extern	int crypto_dispatch(struct cryptop *crp);
527 extern	int crypto_kdispatch(struct cryptkop *);
528 #define	CRYPTO_SYMQ	0x1
529 #define	CRYPTO_ASYMQ	0x2
530 extern	int crypto_unblock(u_int32_t, int);
531 extern	void crypto_done(struct cryptop *crp);
532 extern	void crypto_kdone(struct cryptkop *);
533 extern	int crypto_getfeat(int *);
534 
535 extern	void crypto_freereq(struct cryptop *crp);
536 extern	struct cryptop *crypto_getreq(int num);
537 
538 extern	int crypto_usercrypto;		/* userland may do crypto requests */
539 extern	int crypto_userasymcrypto;	/* userland may do asym crypto reqs */
540 extern	int crypto_devallowsoft;	/* only use hardware crypto */
541 
542 /*
543  * Crypto-related utility routines used mainly by drivers.
544  *
545  * XXX these don't really belong here; but for now they're
546  *     kept apart from the rest of the system.
547  */
548 struct uio;
549 extern	void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
550 extern	void cuio_copyback(struct uio* uio, int off, int len, c_caddr_t cp);
551 extern	int cuio_getptr(struct uio *uio, int loc, int *off);
552 extern	int cuio_apply(struct uio *uio, int off, int len,
553 	    int (*f)(void *, void *, u_int), void *arg);
554 
555 struct mbuf;
556 struct iovec;
557 extern	int crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr,
558 	    int *cnt, int *allocated);
559 
560 extern	void crypto_copyback(int flags, caddr_t buf, int off, int size,
561 	    c_caddr_t in);
562 extern	void crypto_copydata(int flags, caddr_t buf, int off, int size,
563 	    caddr_t out);
564 extern	int crypto_apply(int flags, caddr_t buf, int off, int len,
565 	    int (*f)(void *, void *, u_int), void *arg);
566 
567 #endif /* _KERNEL */
568 #endif /* _CRYPTO_CRYPTO_H_ */
569