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) 2014-2021 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 * Portions of this software were developed by Ararat River
34 * Consulting, LLC under sponsorship of the FreeBSD Foundation.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. The name of the author may not be used to endorse or promote products
46 * derived from this software without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
49 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
50 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
51 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
52 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
53 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
57 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
59 * Effort sponsored in part by the Defense Advanced Research Projects
60 * Agency (DARPA) and Air Force Research Laboratory, Air Force
61 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
65 #ifndef _CRYPTO_CRYPTO_H_
66 #define _CRYPTO_CRYPTO_H_
68 #include <sys/ioccom.h>
71 #include <opencrypto/_cryptodev.h>
72 #include <sys/_task.h>
75 /* Some initial values */
76 #define CRYPTO_DRIVERS_INITIAL 4
79 #define NULL_HASH_LEN 16
80 #define SHA1_HASH_LEN 20
81 #define RIPEMD160_HASH_LEN 20
82 #define SHA2_224_HASH_LEN 28
83 #define SHA2_256_HASH_LEN 32
84 #define SHA2_384_HASH_LEN 48
85 #define SHA2_512_HASH_LEN 64
86 #define AES_GMAC_HASH_LEN 16
87 #define POLY1305_HASH_LEN 16
88 #define AES_CBC_MAC_HASH_LEN 16
89 /* Maximum hash algorithm result length */
90 #define HASH_MAX_LEN SHA2_512_HASH_LEN /* Keep this updated */
92 #define SHA1_BLOCK_LEN 64
93 #define RIPEMD160_BLOCK_LEN 64
94 #define SHA2_224_BLOCK_LEN 64
95 #define SHA2_256_BLOCK_LEN 64
96 #define SHA2_384_BLOCK_LEN 128
97 #define SHA2_512_BLOCK_LEN 128
100 #define NULL_HMAC_BLOCK_LEN 64
101 /* Maximum HMAC block length */
102 #define HMAC_MAX_BLOCK_LEN SHA2_512_BLOCK_LEN /* Keep this updated */
103 #define HMAC_IPAD_VAL 0x36
104 #define HMAC_OPAD_VAL 0x5C
105 /* HMAC Key Length */
106 #define AES_128_GMAC_KEY_LEN 16
107 #define AES_192_GMAC_KEY_LEN 24
108 #define AES_256_GMAC_KEY_LEN 32
109 #define AES_128_CBC_MAC_KEY_LEN 16
110 #define AES_192_CBC_MAC_KEY_LEN 24
111 #define AES_256_CBC_MAC_KEY_LEN 32
113 #define POLY1305_KEY_LEN 32
115 /* Encryption algorithm block sizes */
116 #define NULL_BLOCK_LEN 4 /* IPsec to maintain alignment */
117 #define RIJNDAEL128_BLOCK_LEN 16
118 #define AES_BLOCK_LEN 16
119 #define AES_ICM_BLOCK_LEN 1
120 #define CAMELLIA_BLOCK_LEN 16
121 #define CHACHA20_NATIVE_BLOCK_LEN 64
122 #define EALG_MAX_BLOCK_LEN CHACHA20_NATIVE_BLOCK_LEN /* Keep this updated */
126 #define AES_GCM_IV_LEN 12
127 #define AES_CCM_IV_LEN 12
128 #define AES_XTS_IV_LEN 8
129 #define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */
130 #define CHACHA20_POLY1305_IV_LEN 12
132 /* Min and Max Encryption Key Sizes */
133 #define NULL_MIN_KEY 0
134 #define NULL_MAX_KEY 256 /* 2048 bits, max key */
135 #define RIJNDAEL_MIN_KEY 16
136 #define RIJNDAEL_MAX_KEY 32
137 #define AES_MIN_KEY RIJNDAEL_MIN_KEY
138 #define AES_MAX_KEY RIJNDAEL_MAX_KEY
139 #define AES_XTS_MIN_KEY (2 * AES_MIN_KEY)
140 #define AES_XTS_MAX_KEY (2 * AES_MAX_KEY)
141 #define CAMELLIA_MIN_KEY 16
142 #define CAMELLIA_MAX_KEY 32
143 #define CHACHA20_POLY1305_KEY 32
145 /* Maximum hash algorithm result length */
146 #define AALG_MAX_RESULT_LEN 64 /* Keep this updated */
148 #define CRYPTO_ALGORITHM_MIN 1
149 #define CRYPTO_DES_CBC 1
150 #define CRYPTO_3DES_CBC 2
151 #define CRYPTO_BLF_CBC 3
152 #define CRYPTO_CAST_CBC 4
153 #define CRYPTO_SKIPJACK_CBC 5
154 #define CRYPTO_MD5_HMAC 6
155 #define CRYPTO_SHA1_HMAC 7
156 #define CRYPTO_RIPEMD160_HMAC 8
157 #define CRYPTO_MD5_KPDK 9
158 #define CRYPTO_SHA1_KPDK 10
159 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */
160 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */
161 #define CRYPTO_ARC4 12
162 #define CRYPTO_MD5 13
163 #define CRYPTO_SHA1 14
164 #define CRYPTO_NULL_HMAC 15
165 #define CRYPTO_NULL_CBC 16
166 #define CRYPTO_DEFLATE_COMP 17 /* Deflate compression algorithm */
167 #define CRYPTO_SHA2_256_HMAC 18
168 #define CRYPTO_SHA2_384_HMAC 19
169 #define CRYPTO_SHA2_512_HMAC 20
170 #define CRYPTO_CAMELLIA_CBC 21
171 #define CRYPTO_AES_XTS 22
172 #define CRYPTO_AES_ICM 23 /* commonly known as CTR mode */
173 #define CRYPTO_AES_NIST_GMAC 24 /* GMAC only */
174 #define CRYPTO_AES_NIST_GCM_16 25 /* 16 byte ICV */
176 #define CRYPTO_AES_128_NIST_GMAC 26 /* auth side */
177 #define CRYPTO_AES_192_NIST_GMAC 27 /* auth side */
178 #define CRYPTO_AES_256_NIST_GMAC 28 /* auth side */
180 #define CRYPTO_BLAKE2B 29 /* Blake2b hash */
181 #define CRYPTO_BLAKE2S 30 /* Blake2s hash */
182 #define CRYPTO_CHACHA20 31 /* Chacha20 stream cipher */
183 #define CRYPTO_SHA2_224_HMAC 32
184 #define CRYPTO_RIPEMD160 33
185 #define CRYPTO_SHA2_224 34
186 #define CRYPTO_SHA2_256 35
187 #define CRYPTO_SHA2_384 36
188 #define CRYPTO_SHA2_512 37
189 #define CRYPTO_POLY1305 38
190 #define CRYPTO_AES_CCM_CBC_MAC 39 /* auth side */
191 #define CRYPTO_AES_CCM_16 40 /* cipher side */
192 #define CRYPTO_CHACHA20_POLY1305 41 /* combined AEAD cipher per RFC 8439 */
193 #define CRYPTO_ALGORITHM_MAX 41 /* Keep updated - see below */
195 #define CRYPTO_ALGO_VALID(x) ((x) >= CRYPTO_ALGORITHM_MIN && \
196 (x) <= CRYPTO_ALGORITHM_MAX)
199 * Crypto driver/device flags. They can set in the crid
200 * parameter when creating a session or submitting a key
201 * op to affect the device/driver assigned. If neither
202 * of these are specified then the crid is assumed to hold
203 * the driver id of an existing (and suitable) device that
204 * must be used to satisfy the request.
206 #define CRYPTO_FLAG_HARDWARE 0x01000000 /* hardware accelerated */
207 #define CRYPTO_FLAG_SOFTWARE 0x02000000 /* software implementation */
209 /* Does the kernel support vmpage buffers on this platform? */
211 #define CRYPTO_MAY_HAVE_VMPAGE 1
213 #define CRYPTO_MAY_HAVE_VMPAGE ( PMAP_HAS_DMAP )
215 /* Does the currently running system support vmpage buffers on this platform? */
216 #define CRYPTO_HAS_VMPAGE ( PMAP_HAS_DMAP )
220 uint32_t cipher; /* ie. CRYPTO_AES_CBC */
221 uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */
223 uint32_t keylen; /* cipher key */
225 int mackeylen; /* mac key */
228 uint32_t ses; /* returns: session # */
232 * session and crypt _op structs are used by userspace programs to interact
233 * with /dev/crypto. Confusingly, the internal kernel interface is named
234 * "cryptop" (no underscore).
237 uint32_t cipher; /* ie. CRYPTO_AES_CBC */
238 uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */
240 uint32_t keylen; /* cipher key */
242 int mackeylen; /* mac key */
245 uint32_t ses; /* returns: session # */
246 int crid; /* driver id + flags (rw) */
247 int ivlen; /* length of nonce/IV */
248 int maclen; /* length of MAC/tag */
249 int pad[2]; /* for future expansion */
254 uint16_t op; /* i.e. COP_ENCRYPT */
255 #define COP_ENCRYPT 1
256 #define COP_DECRYPT 2
258 #define COP_F_CIPHER_FIRST 0x0001 /* Cipher before MAC. */
259 #define COP_F_BATCH 0x0008 /* Batch op if possible */
261 const void *src; /* become iov[] inside kernel */
263 void *mac; /* must be big enough for chosen MAC */
267 /* op and flags the same as crypt_op */
270 uint16_t op; /* i.e. COP_ENCRYPT */
275 const void *src; /* become iov[] inside kernel */
277 const void *aad; /* additional authenticated data */
278 void *tag; /* must fit for chosen TAG length */
283 * Parameters for looking up a crypto driver/device by
284 * device name or by id. The latter are returned for
285 * created sessions (crid) and completed key operations.
287 struct crypt_find_op {
288 int crid; /* driver id + flags */
289 char name[32]; /* device/driver name */
292 #define CIOCGSESSION _IOWR('c', 101, struct session_op)
293 #define CIOCFSESSION _IOW('c', 102, uint32_t)
294 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
295 #define CIOCGSESSION2 _IOWR('c', 106, struct session2_op)
296 #define CIOCFINDDEV _IOWR('c', 108, struct crypt_find_op)
297 #define CIOCCRYPTAEAD _IOWR('c', 109, struct crypt_aead)
300 uint64_t cs_ops; /* symmetric crypto ops submitted */
301 uint64_t cs_errs; /* symmetric crypto ops that failed */
302 uint64_t cs_kops; /* asymetric/key ops submitted */
303 uint64_t cs_kerrs; /* asymetric/key ops that failed */
304 uint64_t cs_intrs; /* crypto swi thread activations */
305 uint64_t cs_rets; /* crypto return thread activations */
306 uint64_t cs_blocks; /* symmetric op driver block */
307 uint64_t cs_kblocks; /* symmetric op driver block */
313 * Return values for cryptodev_probesession methods.
315 #define CRYPTODEV_PROBE_HARDWARE (-100)
316 #define CRYPTODEV_PROBE_ACCEL_SOFTWARE (-200)
317 #define CRYPTODEV_PROBE_SOFTWARE (-500)
320 #define CRYPTDEB(s, ...) do { \
321 printf("%s:%d: " s "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
324 #define CRYPTDEB(...) do { } while (0)
327 struct crypto_session_params {
328 int csp_mode; /* Type of operations to perform. */
330 #define CSP_MODE_NONE 0
331 #define CSP_MODE_COMPRESS 1 /* Compression/decompression. */
332 #define CSP_MODE_CIPHER 2 /* Encrypt/decrypt. */
333 #define CSP_MODE_DIGEST 3 /* Compute/verify digest. */
334 #define CSP_MODE_AEAD 4 /* Combined auth/encryption. */
335 #define CSP_MODE_ETA 5 /* IPsec style encrypt-then-auth */
339 #define CSP_F_SEPARATE_OUTPUT 0x0001 /* Requests can use separate output */
340 #define CSP_F_SEPARATE_AAD 0x0002 /* Requests can use separate AAD */
341 #define CSP_F_ESN 0x0004 /* Requests can use seperate ESN field */
343 int csp_ivlen; /* IV length in bytes. */
346 int csp_cipher_klen; /* Key length in bytes. */
347 const void *csp_cipher_key;
350 int csp_auth_klen; /* Key length in bytes. */
351 const void *csp_auth_key;
352 int csp_auth_mlen; /* Number of digest bytes to use.
356 enum crypto_buffer_type {
362 CRYPTO_BUF_SINGLE_MBUF,
363 CRYPTO_BUF_LAST = CRYPTO_BUF_SINGLE_MBUF
367 * Description of a data buffer for a request. Requests can either
368 * have a single buffer that is modified in place or separate input
369 * and output buffers.
371 struct crypto_buffer {
377 struct mbuf *cb_mbuf;
379 vm_page_t *cb_vm_page;
381 int cb_vm_page_offset;
385 enum crypto_buffer_type cb_type;
389 * A cursor is used to iterate through a crypto request data buffer.
391 struct crypto_buffer_cursor {
394 struct mbuf *cc_mbuf;
395 struct iovec *cc_iov;
396 vm_page_t *cc_vmpage;
398 /* Optional bytes of valid data remaining */
401 * Optional offset within the current buffer segment where
405 enum crypto_buffer_type cc_type;
408 /* Structure describing complete operation */
410 TAILQ_ENTRY(cryptop) crp_next;
412 struct task crp_task;
414 crypto_session_t crp_session; /* Session */
415 int crp_olen; /* Result total length */
418 * Error type (zero means no error).
419 * All error codes except EAGAIN
420 * indicate possible data corruption (as in,
421 * the data have been touched). On all
422 * errors, the crp_session may have changed
423 * (reset to a new one), so the caller
424 * should always check and use the new
425 * value on future requests.
429 #define CRYPTO_F_CBIMM 0x0010 /* Do callback immediately */
430 #define CRYPTO_F_DONE 0x0020 /* Operation completed */
431 #define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */
432 #define CRYPTO_F_ASYNC_ORDERED 0x0100 /* Completions must happen in order */
433 #define CRYPTO_F_IV_SEPARATE 0x0200 /* Use crp_iv[] as IV. */
437 struct crypto_buffer crp_buf;
438 struct crypto_buffer crp_obuf;
440 void *crp_aad; /* AAD buffer. */
441 int crp_aad_start; /* Location of AAD. */
442 int crp_aad_length; /* 0 => no AAD. */
443 uint8_t crp_esn[4]; /* high-order ESN */
445 int crp_iv_start; /* Location of IV. IV length is from
448 int crp_payload_start; /* Location of ciphertext. */
449 int crp_payload_output_start;
450 int crp_payload_length;
451 int crp_digest_start; /* Location of MAC/tag. Length is
455 uint8_t crp_iv[EALG_MAX_BLOCK_LEN]; /* IV if IV_SEPARATE. */
457 const void *crp_cipher_key; /* New cipher key if non-NULL. */
458 const void *crp_auth_key; /* New auth key if non-NULL. */
460 void *crp_opaque; /* Opaque pointer, passed along */
462 int (*crp_callback)(struct cryptop *); /* Callback function */
464 struct bintime crp_tstamp; /* performance time stamp */
465 uint32_t crp_seq; /* used for ordered dispatch */
466 uint32_t crp_retw_id; /*
467 * the return worker to be used,
468 * used for ordered dispatch
472 TAILQ_HEAD(cryptopq, cryptop);
475 _crypto_use_buf(struct crypto_buffer *cb, void *buf, int len)
478 cb->cb_buf_len = len;
479 cb->cb_type = CRYPTO_BUF_CONTIG;
483 _crypto_use_mbuf(struct crypto_buffer *cb, struct mbuf *m)
486 cb->cb_type = CRYPTO_BUF_MBUF;
490 _crypto_use_single_mbuf(struct crypto_buffer *cb, struct mbuf *m)
493 cb->cb_type = CRYPTO_BUF_SINGLE_MBUF;
497 _crypto_use_vmpage(struct crypto_buffer *cb, vm_page_t *pages, int len,
500 cb->cb_vm_page = pages;
501 cb->cb_vm_page_len = len;
502 cb->cb_vm_page_offset = offset;
503 cb->cb_type = CRYPTO_BUF_VMPAGE;
507 _crypto_use_uio(struct crypto_buffer *cb, struct uio *uio)
510 cb->cb_type = CRYPTO_BUF_UIO;
514 crypto_use_buf(struct cryptop *crp, void *buf, int len)
516 _crypto_use_buf(&crp->crp_buf, buf, len);
520 crypto_use_mbuf(struct cryptop *crp, struct mbuf *m)
522 _crypto_use_mbuf(&crp->crp_buf, m);
526 crypto_use_single_mbuf(struct cryptop *crp, struct mbuf *m)
528 _crypto_use_single_mbuf(&crp->crp_buf, m);
532 crypto_use_vmpage(struct cryptop *crp, vm_page_t *pages, int len, int offset)
534 _crypto_use_vmpage(&crp->crp_buf, pages, len, offset);
538 crypto_use_uio(struct cryptop *crp, struct uio *uio)
540 _crypto_use_uio(&crp->crp_buf, uio);
544 crypto_use_output_buf(struct cryptop *crp, void *buf, int len)
546 _crypto_use_buf(&crp->crp_obuf, buf, len);
550 crypto_use_output_mbuf(struct cryptop *crp, struct mbuf *m)
552 _crypto_use_mbuf(&crp->crp_obuf, m);
556 crypto_use_output_single_mbuf(struct cryptop *crp, struct mbuf *m)
558 _crypto_use_single_mbuf(&crp->crp_obuf, m);
562 crypto_use_output_vmpage(struct cryptop *crp, vm_page_t *pages, int len,
565 _crypto_use_vmpage(&crp->crp_obuf, pages, len, offset);
569 crypto_use_output_uio(struct cryptop *crp, struct uio *uio)
571 _crypto_use_uio(&crp->crp_obuf, uio);
574 #define CRYPTO_HAS_OUTPUT_BUFFER(crp) \
575 ((crp)->crp_obuf.cb_type != CRYPTO_BUF_NONE)
577 /* Flags in crp_op. */
578 #define CRYPTO_OP_DECRYPT 0x0
579 #define CRYPTO_OP_ENCRYPT 0x1
580 #define CRYPTO_OP_IS_ENCRYPT(op) ((op) & CRYPTO_OP_ENCRYPT)
581 #define CRYPTO_OP_COMPUTE_DIGEST 0x0
582 #define CRYPTO_OP_VERIFY_DIGEST 0x2
583 #define CRYPTO_OP_DECOMPRESS CRYPTO_OP_DECRYPT
584 #define CRYPTO_OP_COMPRESS CRYPTO_OP_ENCRYPT
585 #define CRYPTO_OP_IS_COMPRESS(op) ((op) & CRYPTO_OP_COMPRESS)
588 * Hints passed to process methods.
590 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
592 uint32_t crypto_ses2hid(crypto_session_t crypto_session);
593 uint32_t crypto_ses2caps(crypto_session_t crypto_session);
594 void *crypto_get_driver_session(crypto_session_t crypto_session);
595 const struct crypto_session_params *crypto_get_params(
596 crypto_session_t crypto_session);
597 const struct auth_hash *crypto_auth_hash(const struct crypto_session_params *csp);
598 const struct enc_xform *crypto_cipher(const struct crypto_session_params *csp);
600 MALLOC_DECLARE(M_CRYPTO_DATA);
602 extern int crypto_newsession(crypto_session_t *cses,
603 const struct crypto_session_params *params, int hard);
604 extern void crypto_freesession(crypto_session_t cses);
605 #define CRYPTOCAP_F_HARDWARE CRYPTO_FLAG_HARDWARE
606 #define CRYPTOCAP_F_SOFTWARE CRYPTO_FLAG_SOFTWARE
607 #define CRYPTOCAP_F_SYNC 0x04000000 /* operates synchronously */
608 #define CRYPTOCAP_F_ACCEL_SOFTWARE 0x08000000
609 #define CRYPTO_SESS_SYNC(sess) \
610 ((crypto_ses2caps(sess) & CRYPTOCAP_F_SYNC) != 0)
611 extern int32_t crypto_get_driverid(device_t dev, size_t session_size,
613 extern int crypto_find_driver(const char *);
614 extern device_t crypto_find_device_byhid(int hid);
615 extern int crypto_getcaps(int hid);
616 extern int crypto_unregister_all(uint32_t driverid);
617 extern int crypto_dispatch(struct cryptop *crp);
618 #define CRYPTO_ASYNC_ORDERED 0x1 /* complete in order dispatched */
619 extern int crypto_dispatch_async(struct cryptop *crp, int flags);
620 extern void crypto_dispatch_batch(struct cryptopq *crpq, int flags);
621 #define CRYPTO_SYMQ 0x1
622 extern int crypto_unblock(uint32_t, int);
623 extern void crypto_done(struct cryptop *crp);
625 extern void crypto_destroyreq(struct cryptop *crp);
626 extern void crypto_initreq(struct cryptop *crp, crypto_session_t cses);
627 extern void crypto_freereq(struct cryptop *crp);
628 extern struct cryptop *crypto_getreq(crypto_session_t cses, int how);
630 extern int crypto_usercrypto; /* userland may do crypto requests */
631 extern int crypto_devallowsoft; /* only use hardware crypto */
634 SYSCTL_DECL(_kern_crypto);
637 /* Helper routines for drivers to initialize auth contexts for HMAC. */
640 void hmac_init_ipad(const struct auth_hash *axf, const char *key, int klen,
642 void hmac_init_opad(const struct auth_hash *axf, const char *key, int klen,
646 * Crypto-related utility routines used mainly by drivers.
648 * Similar to m_copyback/data, *_copyback copy data from the 'src'
649 * buffer into the crypto request's data buffer while *_copydata copy
650 * data from the crypto request's data buffer into the the 'dst'
653 void crypto_copyback(struct cryptop *crp, int off, int size,
655 void crypto_copydata(struct cryptop *crp, int off, int size, void *dst);
656 int crypto_apply(struct cryptop *crp, int off, int len,
657 int (*f)(void *, const void *, u_int), void *arg);
658 void *crypto_contiguous_subsegment(struct cryptop *crp, size_t skip,
661 int crypto_apply_buf(struct crypto_buffer *cb, int off, int len,
662 int (*f)(void *, const void *, u_int), void *arg);
663 void *crypto_buffer_contiguous_subsegment(struct crypto_buffer *cb,
664 size_t skip, size_t len);
665 size_t crypto_buffer_len(struct crypto_buffer *cb);
666 void crypto_cursor_init(struct crypto_buffer_cursor *cc,
667 const struct crypto_buffer *cb);
668 void crypto_cursor_advance(struct crypto_buffer_cursor *cc, size_t amount);
669 void *crypto_cursor_segment(struct crypto_buffer_cursor *cc, size_t *len);
670 void crypto_cursor_copyback(struct crypto_buffer_cursor *cc, int size,
672 void crypto_cursor_copydata(struct crypto_buffer_cursor *cc, int size,
674 void crypto_cursor_copydata_noadv(struct crypto_buffer_cursor *cc, int size,
678 crypto_read_iv(struct cryptop *crp, void *iv)
680 const struct crypto_session_params *csp;
682 csp = crypto_get_params(crp->crp_session);
683 if (crp->crp_flags & CRYPTO_F_IV_SEPARATE)
684 memcpy(iv, crp->crp_iv, csp->csp_ivlen);
686 crypto_copydata(crp, crp->crp_iv_start, csp->csp_ivlen, iv);
689 static __inline size_t
690 ccm_max_payload_length(const struct crypto_session_params *csp)
693 const u_int L = 15 - csp->csp_ivlen;
704 return (0xffffffffff);
706 return (0xffffffffffff);
708 return (0xffffffffffffff);
710 return (0xffffffffffffffff);
719 #endif /* _CRYPTO_CRYPTO_H_ */