2 /* $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $ */
5 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
6 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
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.
12 * Copyright (c) 2000 Angelos D. Keromytis
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.
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
25 * Copyright (c) 2001 Theo de Raadt
26 * Copyright (c) 2014 The FreeBSD Foundation
27 * All rights reserved.
29 * Portions of this software were developed by John-Mark Gurney
30 * under sponsorship of the FreeBSD Foundation and
31 * Rubicon Communications, LLC (Netgate).
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
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.
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.
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.
62 #ifndef _CRYPTO_CRYPTO_H_
63 #define _CRYPTO_CRYPTO_H_
65 #include <sys/ioccom.h>
68 #include <opencrypto/_cryptodev.h>
69 #include <sys/_task.h>
72 /* Some initial values */
73 #define CRYPTO_DRIVERS_INITIAL 4
76 #define NULL_HASH_LEN 16
77 #define SHA1_HASH_LEN 20
78 #define RIPEMD160_HASH_LEN 20
79 #define SHA2_224_HASH_LEN 28
80 #define SHA2_256_HASH_LEN 32
81 #define SHA2_384_HASH_LEN 48
82 #define SHA2_512_HASH_LEN 64
83 #define AES_GMAC_HASH_LEN 16
84 #define POLY1305_HASH_LEN 16
85 #define AES_CBC_MAC_HASH_LEN 16
86 /* Maximum hash algorithm result length */
87 #define HASH_MAX_LEN SHA2_512_HASH_LEN /* Keep this updated */
89 #define SHA1_BLOCK_LEN 64
90 #define RIPEMD160_BLOCK_LEN 64
91 #define SHA2_224_BLOCK_LEN 64
92 #define SHA2_256_BLOCK_LEN 64
93 #define SHA2_384_BLOCK_LEN 128
94 #define SHA2_512_BLOCK_LEN 128
97 #define NULL_HMAC_BLOCK_LEN 64
98 /* Maximum HMAC block length */
99 #define HMAC_MAX_BLOCK_LEN SHA2_512_BLOCK_LEN /* Keep this updated */
100 #define HMAC_IPAD_VAL 0x36
101 #define HMAC_OPAD_VAL 0x5C
102 /* HMAC Key Length */
103 #define AES_128_GMAC_KEY_LEN 16
104 #define AES_192_GMAC_KEY_LEN 24
105 #define AES_256_GMAC_KEY_LEN 32
106 #define AES_128_CBC_MAC_KEY_LEN 16
107 #define AES_192_CBC_MAC_KEY_LEN 24
108 #define AES_256_CBC_MAC_KEY_LEN 32
110 #define POLY1305_KEY_LEN 32
112 /* Encryption algorithm block sizes */
113 #define NULL_BLOCK_LEN 4 /* IPsec to maintain alignment */
114 #define RIJNDAEL128_BLOCK_LEN 16
115 #define AES_BLOCK_LEN 16
116 #define AES_ICM_BLOCK_LEN 1
117 #define CAMELLIA_BLOCK_LEN 16
118 #define CHACHA20_NATIVE_BLOCK_LEN 64
119 #define EALG_MAX_BLOCK_LEN CHACHA20_NATIVE_BLOCK_LEN /* Keep this updated */
123 #define AES_GCM_IV_LEN 12
124 #define AES_CCM_IV_LEN 12
125 #define AES_XTS_IV_LEN 8
126 #define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */
127 #define CHACHA20_POLY1305_IV_LEN 12
129 /* Min and Max Encryption Key Sizes */
130 #define NULL_MIN_KEY 0
131 #define NULL_MAX_KEY 256 /* 2048 bits, max key */
132 #define RIJNDAEL_MIN_KEY 16
133 #define RIJNDAEL_MAX_KEY 32
134 #define AES_MIN_KEY RIJNDAEL_MIN_KEY
135 #define AES_MAX_KEY RIJNDAEL_MAX_KEY
136 #define AES_XTS_MIN_KEY (2 * AES_MIN_KEY)
137 #define AES_XTS_MAX_KEY (2 * AES_MAX_KEY)
138 #define CAMELLIA_MIN_KEY 16
139 #define CAMELLIA_MAX_KEY 32
140 #define CHACHA20_POLY1305_KEY 32
142 /* Maximum hash algorithm result length */
143 #define AALG_MAX_RESULT_LEN 64 /* Keep this updated */
145 #define CRYPTO_ALGORITHM_MIN 1
146 #define CRYPTO_DES_CBC 1
147 #define CRYPTO_3DES_CBC 2
148 #define CRYPTO_BLF_CBC 3
149 #define CRYPTO_CAST_CBC 4
150 #define CRYPTO_SKIPJACK_CBC 5
151 #define CRYPTO_MD5_HMAC 6
152 #define CRYPTO_SHA1_HMAC 7
153 #define CRYPTO_RIPEMD160_HMAC 8
154 #define CRYPTO_MD5_KPDK 9
155 #define CRYPTO_SHA1_KPDK 10
156 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */
157 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */
158 #define CRYPTO_ARC4 12
159 #define CRYPTO_MD5 13
160 #define CRYPTO_SHA1 14
161 #define CRYPTO_NULL_HMAC 15
162 #define CRYPTO_NULL_CBC 16
163 #define CRYPTO_DEFLATE_COMP 17 /* Deflate compression algorithm */
164 #define CRYPTO_SHA2_256_HMAC 18
165 #define CRYPTO_SHA2_384_HMAC 19
166 #define CRYPTO_SHA2_512_HMAC 20
167 #define CRYPTO_CAMELLIA_CBC 21
168 #define CRYPTO_AES_XTS 22
169 #define CRYPTO_AES_ICM 23 /* commonly known as CTR mode */
170 #define CRYPTO_AES_NIST_GMAC 24 /* GMAC only */
171 #define CRYPTO_AES_NIST_GCM_16 25 /* 16 byte ICV */
173 #define CRYPTO_AES_128_NIST_GMAC 26 /* auth side */
174 #define CRYPTO_AES_192_NIST_GMAC 27 /* auth side */
175 #define CRYPTO_AES_256_NIST_GMAC 28 /* auth side */
177 #define CRYPTO_BLAKE2B 29 /* Blake2b hash */
178 #define CRYPTO_BLAKE2S 30 /* Blake2s hash */
179 #define CRYPTO_CHACHA20 31 /* Chacha20 stream cipher */
180 #define CRYPTO_SHA2_224_HMAC 32
181 #define CRYPTO_RIPEMD160 33
182 #define CRYPTO_SHA2_224 34
183 #define CRYPTO_SHA2_256 35
184 #define CRYPTO_SHA2_384 36
185 #define CRYPTO_SHA2_512 37
186 #define CRYPTO_POLY1305 38
187 #define CRYPTO_AES_CCM_CBC_MAC 39 /* auth side */
188 #define CRYPTO_AES_CCM_16 40 /* cipher side */
189 #define CRYPTO_CHACHA20_POLY1305 41 /* combined AEAD cipher per RFC 8439 */
190 #define CRYPTO_ALGORITHM_MAX 41 /* Keep updated - see below */
192 #define CRYPTO_ALGO_VALID(x) ((x) >= CRYPTO_ALGORITHM_MIN && \
193 (x) <= CRYPTO_ALGORITHM_MAX)
196 * Crypto driver/device flags. They can set in the crid
197 * parameter when creating a session or submitting a key
198 * op to affect the device/driver assigned. If neither
199 * of these are specified then the crid is assumed to hold
200 * the driver id of an existing (and suitable) device that
201 * must be used to satisfy the request.
203 #define CRYPTO_FLAG_HARDWARE 0x01000000 /* hardware accelerated */
204 #define CRYPTO_FLAG_SOFTWARE 0x02000000 /* software implementation */
206 /* Does the kernel support vmpage buffers on this platform? */
208 #define CRYPTO_MAY_HAVE_VMPAGE 1
210 #define CRYPTO_MAY_HAVE_VMPAGE ( PMAP_HAS_DMAP )
212 /* Does the currently running system support vmpage buffers on this platform? */
213 #define CRYPTO_HAS_VMPAGE ( PMAP_HAS_DMAP )
217 uint32_t cipher; /* ie. CRYPTO_AES_CBC */
218 uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */
220 uint32_t keylen; /* cipher key */
222 int mackeylen; /* mac key */
225 uint32_t ses; /* returns: session # */
229 * session and crypt _op structs are used by userspace programs to interact
230 * with /dev/crypto. Confusingly, the internal kernel interface is named
231 * "cryptop" (no underscore).
234 uint32_t cipher; /* ie. CRYPTO_AES_CBC */
235 uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */
237 uint32_t keylen; /* cipher key */
239 int mackeylen; /* mac key */
242 uint32_t ses; /* returns: session # */
243 int crid; /* driver id + flags (rw) */
244 int pad[4]; /* for future expansion */
249 uint16_t op; /* i.e. COP_ENCRYPT */
250 #define COP_ENCRYPT 1
251 #define COP_DECRYPT 2
253 #define COP_F_CIPHER_FIRST 0x0001 /* Cipher before MAC. */
254 #define COP_F_BATCH 0x0008 /* Batch op if possible */
256 const void *src; /* become iov[] inside kernel */
258 void *mac; /* must be big enough for chosen MAC */
262 /* op and flags the same as crypt_op */
265 uint16_t op; /* i.e. COP_ENCRYPT */
270 const void *src; /* become iov[] inside kernel */
272 const void *aad; /* additional authenticated data */
273 void *tag; /* must fit for chosen TAG length */
278 * Parameters for looking up a crypto driver/device by
279 * device name or by id. The latter are returned for
280 * created sessions (crid) and completed key operations.
282 struct crypt_find_op {
283 int crid; /* driver id + flags */
284 char name[32]; /* device/driver name */
287 #define CIOCGSESSION _IOWR('c', 101, struct session_op)
288 #define CIOCFSESSION _IOW('c', 102, uint32_t)
289 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
290 #define CIOCGSESSION2 _IOWR('c', 106, struct session2_op)
291 #define CIOCFINDDEV _IOWR('c', 108, struct crypt_find_op)
292 #define CIOCCRYPTAEAD _IOWR('c', 109, struct crypt_aead)
295 uint64_t cs_ops; /* symmetric crypto ops submitted */
296 uint64_t cs_errs; /* symmetric crypto ops that failed */
297 uint64_t cs_kops; /* asymetric/key ops submitted */
298 uint64_t cs_kerrs; /* asymetric/key ops that failed */
299 uint64_t cs_intrs; /* crypto swi thread activations */
300 uint64_t cs_rets; /* crypto return thread activations */
301 uint64_t cs_blocks; /* symmetric op driver block */
302 uint64_t cs_kblocks; /* symmetric op driver block */
308 * Return values for cryptodev_probesession methods.
310 #define CRYPTODEV_PROBE_HARDWARE (-100)
311 #define CRYPTODEV_PROBE_ACCEL_SOFTWARE (-200)
312 #define CRYPTODEV_PROBE_SOFTWARE (-500)
315 #define CRYPTDEB(s, ...) do { \
316 printf("%s:%d: " s "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
319 #define CRYPTDEB(...) do { } while (0)
322 struct crypto_session_params {
323 int csp_mode; /* Type of operations to perform. */
325 #define CSP_MODE_NONE 0
326 #define CSP_MODE_COMPRESS 1 /* Compression/decompression. */
327 #define CSP_MODE_CIPHER 2 /* Encrypt/decrypt. */
328 #define CSP_MODE_DIGEST 3 /* Compute/verify digest. */
329 #define CSP_MODE_AEAD 4 /* Combined auth/encryption. */
330 #define CSP_MODE_ETA 5 /* IPsec style encrypt-then-auth */
334 #define CSP_F_SEPARATE_OUTPUT 0x0001 /* Requests can use separate output */
335 #define CSP_F_SEPARATE_AAD 0x0002 /* Requests can use separate AAD */
336 #define CSP_F_ESN 0x0004 /* Requests can use seperate ESN field */
338 int csp_ivlen; /* IV length in bytes. */
341 int csp_cipher_klen; /* Key length in bytes. */
342 const void *csp_cipher_key;
345 int csp_auth_klen; /* Key length in bytes. */
346 const void *csp_auth_key;
347 int csp_auth_mlen; /* Number of digest bytes to use.
351 enum crypto_buffer_type {
357 CRYPTO_BUF_LAST = CRYPTO_BUF_VMPAGE
361 * Description of a data buffer for a request. Requests can either
362 * have a single buffer that is modified in place or separate input
363 * and output buffers.
365 struct crypto_buffer {
371 struct mbuf *cb_mbuf;
373 vm_page_t *cb_vm_page;
375 int cb_vm_page_offset;
379 enum crypto_buffer_type cb_type;
383 * A cursor is used to iterate through a crypto request data buffer.
385 struct crypto_buffer_cursor {
388 struct mbuf *cc_mbuf;
389 struct iovec *cc_iov;
390 vm_page_t *cc_vmpage;
392 /* Optional bytes of valid data remaining */
395 * Optional offset within the current buffer segment where
399 enum crypto_buffer_type cc_type;
402 /* Structure describing complete operation */
404 TAILQ_ENTRY(cryptop) crp_next;
406 struct task crp_task;
408 crypto_session_t crp_session; /* Session */
409 int crp_olen; /* Result total length */
412 * Error type (zero means no error).
413 * All error codes except EAGAIN
414 * indicate possible data corruption (as in,
415 * the data have been touched). On all
416 * errors, the crp_session may have changed
417 * (reset to a new one), so the caller
418 * should always check and use the new
419 * value on future requests.
423 #define CRYPTO_F_CBIMM 0x0010 /* Do callback immediately */
424 #define CRYPTO_F_DONE 0x0020 /* Operation completed */
425 #define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */
426 #define CRYPTO_F_ASYNC_ORDERED 0x0100 /* Completions must happen in order */
427 #define CRYPTO_F_IV_SEPARATE 0x0200 /* Use crp_iv[] as IV. */
431 struct crypto_buffer crp_buf;
432 struct crypto_buffer crp_obuf;
434 void *crp_aad; /* AAD buffer. */
435 int crp_aad_start; /* Location of AAD. */
436 int crp_aad_length; /* 0 => no AAD. */
437 uint8_t crp_esn[4]; /* high-order ESN */
439 int crp_iv_start; /* Location of IV. IV length is from
442 int crp_payload_start; /* Location of ciphertext. */
443 int crp_payload_output_start;
444 int crp_payload_length;
445 int crp_digest_start; /* Location of MAC/tag. Length is
449 uint8_t crp_iv[EALG_MAX_BLOCK_LEN]; /* IV if IV_SEPARATE. */
451 const void *crp_cipher_key; /* New cipher key if non-NULL. */
452 const void *crp_auth_key; /* New auth key if non-NULL. */
454 void *crp_opaque; /* Opaque pointer, passed along */
456 int (*crp_callback)(struct cryptop *); /* Callback function */
458 struct bintime crp_tstamp; /* performance time stamp */
459 uint32_t crp_seq; /* used for ordered dispatch */
460 uint32_t crp_retw_id; /*
461 * the return worker to be used,
462 * used for ordered dispatch
466 TAILQ_HEAD(cryptopq, cryptop);
469 _crypto_use_buf(struct crypto_buffer *cb, void *buf, int len)
472 cb->cb_buf_len = len;
473 cb->cb_type = CRYPTO_BUF_CONTIG;
477 _crypto_use_mbuf(struct crypto_buffer *cb, struct mbuf *m)
480 cb->cb_type = CRYPTO_BUF_MBUF;
484 _crypto_use_vmpage(struct crypto_buffer *cb, vm_page_t *pages, int len,
487 cb->cb_vm_page = pages;
488 cb->cb_vm_page_len = len;
489 cb->cb_vm_page_offset = offset;
490 cb->cb_type = CRYPTO_BUF_VMPAGE;
494 _crypto_use_uio(struct crypto_buffer *cb, struct uio *uio)
497 cb->cb_type = CRYPTO_BUF_UIO;
501 crypto_use_buf(struct cryptop *crp, void *buf, int len)
503 _crypto_use_buf(&crp->crp_buf, buf, len);
507 crypto_use_mbuf(struct cryptop *crp, struct mbuf *m)
509 _crypto_use_mbuf(&crp->crp_buf, m);
513 crypto_use_vmpage(struct cryptop *crp, vm_page_t *pages, int len, int offset)
515 _crypto_use_vmpage(&crp->crp_buf, pages, len, offset);
519 crypto_use_uio(struct cryptop *crp, struct uio *uio)
521 _crypto_use_uio(&crp->crp_buf, uio);
525 crypto_use_output_buf(struct cryptop *crp, void *buf, int len)
527 _crypto_use_buf(&crp->crp_obuf, buf, len);
531 crypto_use_output_mbuf(struct cryptop *crp, struct mbuf *m)
533 _crypto_use_mbuf(&crp->crp_obuf, m);
537 crypto_use_output_vmpage(struct cryptop *crp, vm_page_t *pages, int len,
540 _crypto_use_vmpage(&crp->crp_obuf, pages, len, offset);
544 crypto_use_output_uio(struct cryptop *crp, struct uio *uio)
546 _crypto_use_uio(&crp->crp_obuf, uio);
549 #define CRYPTO_HAS_OUTPUT_BUFFER(crp) \
550 ((crp)->crp_obuf.cb_type != CRYPTO_BUF_NONE)
552 /* Flags in crp_op. */
553 #define CRYPTO_OP_DECRYPT 0x0
554 #define CRYPTO_OP_ENCRYPT 0x1
555 #define CRYPTO_OP_IS_ENCRYPT(op) ((op) & CRYPTO_OP_ENCRYPT)
556 #define CRYPTO_OP_COMPUTE_DIGEST 0x0
557 #define CRYPTO_OP_VERIFY_DIGEST 0x2
558 #define CRYPTO_OP_DECOMPRESS CRYPTO_OP_DECRYPT
559 #define CRYPTO_OP_COMPRESS CRYPTO_OP_ENCRYPT
560 #define CRYPTO_OP_IS_COMPRESS(op) ((op) & CRYPTO_OP_COMPRESS)
563 * Hints passed to process methods.
565 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
567 uint32_t crypto_ses2hid(crypto_session_t crypto_session);
568 uint32_t crypto_ses2caps(crypto_session_t crypto_session);
569 void *crypto_get_driver_session(crypto_session_t crypto_session);
570 const struct crypto_session_params *crypto_get_params(
571 crypto_session_t crypto_session);
572 struct auth_hash *crypto_auth_hash(const struct crypto_session_params *csp);
573 struct enc_xform *crypto_cipher(const struct crypto_session_params *csp);
575 MALLOC_DECLARE(M_CRYPTO_DATA);
577 extern int crypto_newsession(crypto_session_t *cses,
578 const struct crypto_session_params *params, int hard);
579 extern void crypto_freesession(crypto_session_t cses);
580 #define CRYPTOCAP_F_HARDWARE CRYPTO_FLAG_HARDWARE
581 #define CRYPTOCAP_F_SOFTWARE CRYPTO_FLAG_SOFTWARE
582 #define CRYPTOCAP_F_SYNC 0x04000000 /* operates synchronously */
583 #define CRYPTOCAP_F_ACCEL_SOFTWARE 0x08000000
584 #define CRYPTO_SESS_SYNC(sess) \
585 ((crypto_ses2caps(sess) & CRYPTOCAP_F_SYNC) != 0)
586 extern int32_t crypto_get_driverid(device_t dev, size_t session_size,
588 extern int crypto_find_driver(const char *);
589 extern device_t crypto_find_device_byhid(int hid);
590 extern int crypto_getcaps(int hid);
591 extern int crypto_unregister_all(uint32_t driverid);
592 extern int crypto_dispatch(struct cryptop *crp);
593 #define CRYPTO_ASYNC_ORDERED 0x1 /* complete in order dispatched */
594 extern int crypto_dispatch_async(struct cryptop *crp, int flags);
595 extern void crypto_dispatch_batch(struct cryptopq *crpq, int flags);
596 #define CRYPTO_SYMQ 0x1
597 extern int crypto_unblock(uint32_t, int);
598 extern void crypto_done(struct cryptop *crp);
600 extern void crypto_destroyreq(struct cryptop *crp);
601 extern void crypto_initreq(struct cryptop *crp, crypto_session_t cses);
602 extern void crypto_freereq(struct cryptop *crp);
603 extern struct cryptop *crypto_getreq(crypto_session_t cses, int how);
605 extern int crypto_usercrypto; /* userland may do crypto requests */
606 extern int crypto_devallowsoft; /* only use hardware crypto */
609 SYSCTL_DECL(_kern_crypto);
612 /* Helper routines for drivers to initialize auth contexts for HMAC. */
615 void hmac_init_ipad(const struct auth_hash *axf, const char *key, int klen,
617 void hmac_init_opad(const struct auth_hash *axf, const char *key, int klen,
621 * Crypto-related utility routines used mainly by drivers.
623 * Similar to m_copyback/data, *_copyback copy data from the 'src'
624 * buffer into the crypto request's data buffer while *_copydata copy
625 * data from the crypto request's data buffer into the the 'dst'
628 void crypto_copyback(struct cryptop *crp, int off, int size,
630 void crypto_copydata(struct cryptop *crp, int off, int size, void *dst);
631 int crypto_apply(struct cryptop *crp, int off, int len,
632 int (*f)(void *, const void *, u_int), void *arg);
633 void *crypto_contiguous_subsegment(struct cryptop *crp, size_t skip,
636 int crypto_apply_buf(struct crypto_buffer *cb, int off, int len,
637 int (*f)(void *, const void *, u_int), void *arg);
638 void *crypto_buffer_contiguous_subsegment(struct crypto_buffer *cb,
639 size_t skip, size_t len);
640 size_t crypto_buffer_len(struct crypto_buffer *cb);
641 void crypto_cursor_init(struct crypto_buffer_cursor *cc,
642 const struct crypto_buffer *cb);
643 void crypto_cursor_advance(struct crypto_buffer_cursor *cc, size_t amount);
644 void *crypto_cursor_segbase(struct crypto_buffer_cursor *cc);
645 size_t crypto_cursor_seglen(struct crypto_buffer_cursor *cc);
646 void crypto_cursor_copyback(struct crypto_buffer_cursor *cc, int size,
648 void crypto_cursor_copydata(struct crypto_buffer_cursor *cc, int size,
650 void crypto_cursor_copydata_noadv(struct crypto_buffer_cursor *cc, int size,
654 crypto_read_iv(struct cryptop *crp, void *iv)
656 const struct crypto_session_params *csp;
658 csp = crypto_get_params(crp->crp_session);
659 if (crp->crp_flags & CRYPTO_F_IV_SEPARATE)
660 memcpy(iv, crp->crp_iv, csp->csp_ivlen);
662 crypto_copydata(crp, crp->crp_iv_start, csp->csp_ivlen, iv);
666 #endif /* _CRYPTO_CRYPTO_H_ */