1 /* $FreeBSD: releng/5.0/sys/opencrypto/cryptodev.h 108900 2003-01-07 21:45:24Z sam $ */
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 *
7 * This code was written by Angelos D. Keromytis in Athens, Greece, in
8 * February 2000. Network Security Technologies Inc. (NSTI) kindly
9 * supported the development of this code.
10 *
11 * Copyright (c) 2000 Angelos D. Keromytis
12 *
13 * Permission to use, copy, and modify this software with or without fee
14 * is hereby granted, provided that this entire notice is included in
15 * all source code copies of any software which is or includes a copy or
16 * modification of this software.
17 *
18 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
20 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
21 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
22 * PURPOSE.
23 *
24 * Copyright (c) 2001 Theo de Raadt
25 *
26 * Redistribution and use in source and binary forms, with or without
27 * modification, are permitted provided that the following conditions
28 * are met:
29 *
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. The name of the author may not be used to endorse or promote products
36 * derived from this software without specific prior written permission.
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
41 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
42 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
44 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
45 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
47 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 *
49 * Effort sponsored in part by the Defense Advanced Research Projects
50 * Agency (DARPA) and Air Force Research Laboratory, Air Force
51 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
52 *
53 */
54
55 #ifndef _CRYPTO_CRYPTO_H_
56 #define _CRYPTO_CRYPTO_H_
57
58 #include <sys/ioccom.h>
59
60 /* Some initial values */
61 #define CRYPTO_DRIVERS_INITIAL 4
62 #define CRYPTO_SW_SESSIONS 32
63
64 /* HMAC values */
65 #define HMAC_BLOCK_LEN 64
66 #define HMAC_IPAD_VAL 0x36
67 #define HMAC_OPAD_VAL 0x5C
68
69 /* Encryption algorithm block sizes */
70 #define DES_BLOCK_LEN 8
71 #define DES3_BLOCK_LEN 8
72 #define BLOWFISH_BLOCK_LEN 8
73 #define SKIPJACK_BLOCK_LEN 8
74 #define CAST128_BLOCK_LEN 8
75 #define RIJNDAEL128_BLOCK_LEN 16
76 #define EALG_MAX_BLOCK_LEN 16 /* Keep this updated */
77
78 /* Maximum hash algorithm result length */
79 #define AALG_MAX_RESULT_LEN 64 /* Keep this updated */
80
81 #define CRYPTO_ALGORITHM_MIN 1
82 #define CRYPTO_DES_CBC 1
83 #define CRYPTO_3DES_CBC 2
84 #define CRYPTO_BLF_CBC 3
85 #define CRYPTO_CAST_CBC 4
86 #define CRYPTO_SKIPJACK_CBC 5
87 #define CRYPTO_MD5_HMAC 6
88 #define CRYPTO_SHA1_HMAC 7
89 #define CRYPTO_RIPEMD160_HMAC 8
90 #define CRYPTO_MD5_KPDK 9
91 #define CRYPTO_SHA1_KPDK 10
92 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */
93 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */
94 #define CRYPTO_ARC4 12
95 #define CRYPTO_MD5 13
96 #define CRYPTO_SHA1 14
97 #define CRYPTO_SHA2_HMAC 15
98 #define CRYPTO_NULL_HMAC 16
99 #define CRYPTO_NULL_CBC 17
100 #define CRYPTO_DEFLATE_COMP 18 /* Deflate compression algorithm */
101 #define CRYPTO_ALGORITHM_MAX 18 /* Keep updated - see below */
102
103 /* Algorithm flags */
104 #define CRYPTO_ALG_FLAG_SUPPORTED 0x01 /* Algorithm is supported */
105 #define CRYPTO_ALG_FLAG_RNG_ENABLE 0x02 /* Has HW RNG for DH/DSA */
106 #define CRYPTO_ALG_FLAG_DSA_SHA 0x04 /* Can do SHA on msg */
107
108 struct session_op {
109 u_int32_t cipher; /* ie. CRYPTO_DES_CBC */
110 u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
111
112 u_int32_t keylen; /* cipher key */
113 caddr_t key;
114 int mackeylen; /* mac key */
115 caddr_t mackey;
116
117 u_int32_t ses; /* returns: session # */
118 };
119
120 struct crypt_op {
121 u_int32_t ses;
122 u_int16_t op; /* i.e. COP_ENCRYPT */
123 #define COP_ENCRYPT 1
124 #define COP_DECRYPT 2
125 u_int16_t flags; /* always 0 */
126 u_int len;
127 caddr_t src, dst; /* become iov[] inside kernel */
128 caddr_t mac; /* must be big enough for chosen MAC */
129 caddr_t iv;
130 };
131
132 #define CRYPTO_MAX_MAC_LEN 20
133
134 /* bignum parameter, in packed bytes, ... */
135 struct crparam {
136 caddr_t crp_p;
137 u_int crp_nbits;
138 };
139
140 #define CRK_MAXPARAM 8
141
142 struct crypt_kop {
143 u_int crk_op; /* ie. CRK_MOD_EXP or other */
144 u_int crk_status; /* return status */
145 u_short crk_iparams; /* # of input parameters */
146 u_short crk_oparams; /* # of output parameters */
147 u_int crk_pad1;
148 struct crparam crk_param[CRK_MAXPARAM];
149 };
150 #define CRK_ALGORITM_MIN 0
151 #define CRK_MOD_EXP 0
152 #define CRK_MOD_EXP_CRT 1
153 #define CRK_DSA_SIGN 2
154 #define CRK_DSA_VERIFY 3
155 #define CRK_DH_COMPUTE_KEY 4
156 #define CRK_ALGORITHM_MAX 4 /* Keep updated - see below */
157
158 #define CRF_MOD_EXP (1 << CRK_MOD_EXP)
159 #define CRF_MOD_EXP_CRT (1 << CRK_MOD_EXP_CRT)
160 #define CRF_DSA_SIGN (1 << CRK_DSA_SIGN)
161 #define CRF_DSA_VERIFY (1 << CRK_DSA_VERIFY)
162 #define CRF_DH_COMPUTE_KEY (1 << CRK_DH_COMPUTE_KEY)
163
164 /*
165 * done against open of /dev/crypto, to get a cloned descriptor.
166 * Please use F_SETFD against the cloned descriptor.
167 */
168 #define CRIOGET _IOWR('c', 100, u_int32_t)
169
170 /* the following are done against the cloned descriptor */
171 #define CIOCGSESSION _IOWR('c', 101, struct session_op)
172 #define CIOCFSESSION _IOW('c', 102, u_int32_t)
173 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
174 #define CIOCKEY _IOWR('c', 104, struct crypt_kop)
175
176 #define CIOCASYMFEAT _IOR('c', 105, u_int32_t)
177
178 struct cryptotstat {
179 struct timespec acc; /* total accumulated time */
180 struct timespec min; /* min time */
181 struct timespec max; /* max time */
182 u_int32_t count; /* number of observations */
183 };
184
185 struct cryptostats {
186 u_int32_t cs_ops; /* symmetric crypto ops submitted */
187 u_int32_t cs_errs; /* symmetric crypto ops that failed */
188 u_int32_t cs_kops; /* asymetric/key ops submitted */
189 u_int32_t cs_kerrs; /* asymetric/key ops that failed */
190 u_int32_t cs_intrs; /* crypto swi thread activations */
191 u_int32_t cs_rets; /* crypto return thread activations */
192 u_int32_t cs_blocks; /* symmetric op driver block */
193 u_int32_t cs_kblocks; /* symmetric op driver block */
194 /*
195 * When CRYPTO_TIMING is defined at compile time and the
196 * sysctl debug.crypto is set to 1, the crypto system will
197 * accumulate statistics about how long it takes to process
198 * crypto requests at various points during processing.
199 */
200 struct cryptotstat cs_invoke; /* crypto_dipsatch -> crypto_invoke */
201 struct cryptotstat cs_done; /* crypto_invoke -> crypto_done */
202 struct cryptotstat cs_cb; /* crypto_done -> callback */
203 struct cryptotstat cs_finis; /* callback -> callback return */
204 };
205
206 #ifdef _KERNEL
207 /* Standard initialization structure beginning */
208 struct cryptoini {
209 int cri_alg; /* Algorithm to use */
210 int cri_klen; /* Key length, in bits */
211 int cri_rnd; /* Algorithm rounds, where relevant */
212 caddr_t cri_key; /* key to use */
213 u_int8_t cri_iv[EALG_MAX_BLOCK_LEN]; /* IV to use */
214 struct cryptoini *cri_next;
215 };
216
217 /* Describe boundaries of a single crypto operation */
218 struct cryptodesc {
219 int crd_skip; /* How many bytes to ignore from start */
220 int crd_len; /* How many bytes to process */
221 int crd_inject; /* Where to inject results, if applicable */
222 int crd_flags;
223
224 #define CRD_F_ENCRYPT 0x01 /* Set when doing encryption */
225 #define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in
226 place, so don't copy. */
227 #define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */
228 #define CRD_F_DSA_SHA_NEEDED 0x08 /* Compute SHA-1 of buffer for DSA */
229 #define CRD_F_COMP 0x0f /* Set when doing compression */
230
231 struct cryptoini CRD_INI; /* Initialization/context data */
232 #define crd_iv CRD_INI.cri_iv
233 #define crd_key CRD_INI.cri_key
234 #define crd_rnd CRD_INI.cri_rnd
235 #define crd_alg CRD_INI.cri_alg
236 #define crd_klen CRD_INI.cri_klen
237
238 struct cryptodesc *crd_next;
239 };
240
241 /* Structure describing complete operation */
242 struct cryptop {
243 TAILQ_ENTRY(cryptop) crp_next;
244
245 u_int64_t crp_sid; /* Session ID */
246 int crp_ilen; /* Input data total length */
247 int crp_olen; /* Result total length */
248
249 int crp_etype; /*
250 * Error type (zero means no error).
251 * All error codes except EAGAIN
252 * indicate possible data corruption (as in,
253 * the data have been touched). On all
254 * errors, the crp_sid may have changed
255 * (reset to a new one), so the caller
256 * should always check and use the new
257 * value on future requests.
258 */
259 int crp_flags;
260
261 #define CRYPTO_F_IMBUF 0x0001 /* Input/output are mbuf chains, otherwise contig */
262 #define CRYPTO_F_IOV 0x0002 /* Input/output are uio */
263 #define CRYPTO_F_REL 0x0004 /* Must return data in same place */
264 #define CRYPTO_F_NODELAY 0x0008 /* Dispatch as quickly as possible */
265
266 caddr_t crp_buf; /* Data to be processed */
267 caddr_t crp_opaque; /* Opaque pointer, passed along */
268 struct cryptodesc *crp_desc; /* Linked list of processing descriptors */
269
270 int (*crp_callback)(struct cryptop *); /* Callback function */
271
272 caddr_t crp_mac;
273 struct bintime crp_tstamp; /* performance time stamp */
274 };
275
276 #define CRYPTO_BUF_CONTIG 0x0
277 #define CRYPTO_BUF_IOV 0x1
278 #define CRYPTO_BUF_MBUF 0x2
279
280 #define CRYPTO_OP_DECRYPT 0x0
281 #define CRYPTO_OP_ENCRYPT 0x1
282
283 /*
284 * Hints passed to process methods.
285 */
286 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
287
288 struct cryptkop {
289 TAILQ_ENTRY(cryptkop) krp_next;
290
291 u_int krp_op; /* ie. CRK_MOD_EXP or other */
292 u_int krp_status; /* return status */
293 u_short krp_iparams; /* # of input parameters */
294 u_short krp_oparams; /* # of output parameters */
295 u_int32_t krp_hid;
296 struct crparam krp_param[CRK_MAXPARAM]; /* kvm */
297 int (*krp_callback)(struct cryptkop *);
298 };
299
300 /* Crypto capabilities structure */
301 struct cryptocap {
302 u_int32_t cc_sessions;
303
304 /*
305 * Largest possible operator length (in bits) for each type of
306 * encryption algorithm.
307 */
308 u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1];
309
310 u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1];
311
312 u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1];
313
314 u_int8_t cc_flags;
315 u_int8_t cc_qblocked; /* symmetric q blocked */
316 u_int8_t cc_kqblocked; /* asymmetric q blocked */
317 #define CRYPTOCAP_F_CLEANUP 0x1
318 #define CRYPTOCAP_F_SOFTWARE 0x02
319
320 void *cc_arg; /* callback argument */
321 int (*cc_newsession)(void*, u_int32_t*, struct cryptoini*);
322 int (*cc_process)(void*, struct cryptop *, int);
323 int (*cc_freesession)(void*, u_int64_t);
324 void *cc_karg; /* callback argument */
325 int (*cc_kprocess) (void*, struct cryptkop *, int);
326 };
327
328 MALLOC_DECLARE(M_CRYPTO_DATA);
329
330 extern int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
331 extern int crypto_freesession(u_int64_t sid);
332 extern int32_t crypto_get_driverid(u_int32_t flags);
333 extern int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
334 u_int32_t flags,
335 int (*newses)(void*, u_int32_t*, struct cryptoini*),
336 int (*freeses)(void*, u_int64_t),
337 int (*process)(void*, struct cryptop *, int),
338 void *arg);
339 extern int crypto_kregister(u_int32_t, int, u_int32_t,
340 int (*)(void*, struct cryptkop *, int),
341 void *arg);
342 extern int crypto_unregister(u_int32_t driverid, int alg);
343 extern int crypto_unregister_all(u_int32_t driverid);
344 extern int crypto_dispatch(struct cryptop *crp);
345 extern int crypto_kdispatch(struct cryptkop *);
346 #define CRYPTO_SYMQ 0x1
347 #define CRYPTO_ASYMQ 0x2
348 extern int crypto_unblock(u_int32_t, int);
349 extern void crypto_done(struct cryptop *crp);
350 extern void crypto_kdone(struct cryptkop *);
351 extern int crypto_getfeat(int *);
352
353 extern void crypto_freereq(struct cryptop *crp);
354 extern struct cryptop *crypto_getreq(int num);
355
356 extern int crypto_usercrypto; /* userland may do crypto requests */
357 extern int crypto_userasymcrypto; /* userland may do asym crypto reqs */
358 extern int crypto_devallowsoft; /* only use hardware crypto */
359
360 /*
361 * Crypto-related utility routines used mainly by drivers.
362 *
363 * XXX these don't really belong here; but for now they're
364 * kept apart from the rest of the system.
365 */
366 struct mbuf;
367 struct mbuf *m_getptr(struct mbuf *, int, int *);
368
369 struct uio;
370 extern void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
371 extern void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
372 extern struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
373 #endif /* _KERNEL */
374 #endif /* _CRYPTO_CRYPTO_H_ */
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