1 /* $NetBSD: cryptodev.h,v 1.5 2003/08/21 19:44:14 jonathan Exp $ */
2 /* $FreeBSD: src/sys/opencrypto/cryptodev.h,v 1.2.2.6 2003/07/02 17:04:50 sam Exp $ */
3 /* $OpenBSD: cryptodev.h,v 1.33 2002/07/17 23:52:39 art Exp $ */
4
5 /*
6 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
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 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 *
31 * 1. Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer.
33 * 2. Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in the
35 * documentation and/or other materials provided with the distribution.
36 * 3. The name of the author may not be used to endorse or promote products
37 * derived from this software without specific prior written permission.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
40 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
42 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
43 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
45 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
46 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
47 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
48 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 *
50 * Effort sponsored in part by the Defense Advanced Research Projects
51 * Agency (DARPA) and Air Force Research Laboratory, Air Force
52 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
53 *
54 */
55
56 #ifndef _CRYPTO_CRYPTO_H_
57 #define _CRYPTO_CRYPTO_H_
58
59 #include <sys/ioccom.h>
60
61 /* Some initial values */
62 #define CRYPTO_DRIVERS_INITIAL 4
63 #define CRYPTO_SW_SESSIONS 32
64
65 /* HMAC values */
66 #define HMAC_BLOCK_LEN 64
67 #define HMAC_IPAD_VAL 0x36
68 #define HMAC_OPAD_VAL 0x5C
69
70 /* Encryption algorithm block sizes */
71 #define DES_BLOCK_LEN 8
72 #define DES3_BLOCK_LEN 8
73 #define BLOWFISH_BLOCK_LEN 8
74 #define SKIPJACK_BLOCK_LEN 8
75 #define CAST128_BLOCK_LEN 8
76 #define RIJNDAEL128_BLOCK_LEN 16
77 #define EALG_MAX_BLOCK_LEN 16 /* Keep this updated */
78
79 /* Maximum hash algorithm result length */
80 #define AALG_MAX_RESULT_LEN 64 /* Keep this updated */
81
82 #define CRYPTO_ALGORITHM_MIN 1
83 #define CRYPTO_DES_CBC 1
84 #define CRYPTO_3DES_CBC 2
85 #define CRYPTO_BLF_CBC 3
86 #define CRYPTO_CAST_CBC 4
87 #define CRYPTO_SKIPJACK_CBC 5
88 #define CRYPTO_MD5_HMAC 6
89 #define CRYPTO_SHA1_HMAC 7
90 #define CRYPTO_RIPEMD160_HMAC 8
91 #define CRYPTO_MD5_KPDK 9
92 #define CRYPTO_SHA1_KPDK 10
93 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */
94 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */
95 #define CRYPTO_ARC4 12
96 #define CRYPTO_MD5 13
97 #define CRYPTO_SHA1 14
98 #define CRYPTO_SHA2_HMAC 15
99 #define CRYPTO_NULL_HMAC 16
100 #define CRYPTO_NULL_CBC 17
101 #define CRYPTO_DEFLATE_COMP 18 /* Deflate compression algorithm */
102 #define CRYPTO_ALGORITHM_MAX 18 /* Keep updated - see below */
103
104 /* Algorithm flags */
105 #define CRYPTO_ALG_FLAG_SUPPORTED 0x01 /* Algorithm is supported */
106 #define CRYPTO_ALG_FLAG_RNG_ENABLE 0x02 /* Has HW RNG for DH/DSA */
107 #define CRYPTO_ALG_FLAG_DSA_SHA 0x04 /* Can do SHA on msg */
108
109 struct session_op {
110 u_int32_t cipher; /* ie. CRYPTO_DES_CBC */
111 u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
112
113 u_int32_t keylen; /* cipher key */
114 caddr_t key;
115 int mackeylen; /* mac key */
116 caddr_t mackey;
117
118 u_int32_t ses; /* returns: session # */
119 };
120
121 struct crypt_op {
122 u_int32_t ses;
123 u_int16_t op; /* i.e. COP_ENCRYPT */
124 #define COP_ENCRYPT 1
125 #define COP_DECRYPT 2
126 u_int16_t flags;
127 #define COP_F_BATCH 0x0008 /* Dispatch as quickly as possible */
128 u_int len;
129 caddr_t src, dst; /* become iov[] inside kernel */
130 caddr_t mac; /* must be big enough for chosen MAC */
131 caddr_t iv;
132 };
133
134 #define CRYPTO_MAX_MAC_LEN 20
135
136 /* bignum parameter, in packed bytes, ... */
137 struct crparam {
138 caddr_t crp_p;
139 u_int crp_nbits;
140 };
141
142 #define CRK_MAXPARAM 8
143
144 struct crypt_kop {
145 u_int crk_op; /* ie. CRK_MOD_EXP or other */
146 u_int crk_status; /* return status */
147 u_short crk_iparams; /* # of input parameters */
148 u_short crk_oparams; /* # of output parameters */
149 u_int crk_pad1;
150 struct crparam crk_param[CRK_MAXPARAM];
151 };
152 #define CRK_ALGORITM_MIN 0
153 #define CRK_MOD_EXP 0
154 #define CRK_MOD_EXP_CRT 1
155 #define CRK_DSA_SIGN 2
156 #define CRK_DSA_VERIFY 3
157 #define CRK_DH_COMPUTE_KEY 4
158 #define CRK_ALGORITHM_MAX 4 /* Keep updated - see below */
159
160 #define CRF_MOD_EXP (1 << CRK_MOD_EXP)
161 #define CRF_MOD_EXP_CRT (1 << CRK_MOD_EXP_CRT)
162 #define CRF_DSA_SIGN (1 << CRK_DSA_SIGN)
163 #define CRF_DSA_VERIFY (1 << CRK_DSA_VERIFY)
164 #define CRF_DH_COMPUTE_KEY (1 << CRK_DH_COMPUTE_KEY)
165
166 /*
167 * done against open of /dev/crypto, to get a cloned descriptor.
168 * Please use F_SETFD against the cloned descriptor.
169 */
170 #define CRIOGET _IOWR('c', 100, u_int32_t)
171
172 /* the following are done against the cloned descriptor */
173 #define CIOCGSESSION _IOWR('c', 101, struct session_op)
174 #define CIOCFSESSION _IOW('c', 102, u_int32_t)
175 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
176 #define CIOCKEY _IOWR('c', 104, struct crypt_kop)
177
178 #define CIOCASYMFEAT _IOR('c', 105, u_int32_t)
179
180 struct cryptotstat {
181 struct timespec acc; /* total accumulated time */
182 struct timespec min; /* max time */
183 struct timespec max; /* max time */
184 u_int32_t count; /* number of observations */
185 };
186
187 struct cryptostats {
188 u_int32_t cs_ops; /* symmetric crypto ops submitted */
189 u_int32_t cs_errs; /* symmetric crypto ops that failed */
190 u_int32_t cs_kops; /* asymetric/key ops submitted */
191 u_int32_t cs_kerrs; /* asymetric/key ops that failed */
192 u_int32_t cs_intrs; /* crypto swi thread activations */
193 u_int32_t cs_rets; /* crypto return thread activations */
194 u_int32_t cs_blocks; /* symmetric op driver block */
195 u_int32_t cs_kblocks; /* symmetric op driver block */
196 /*
197 * When CRYPTO_TIMING is defined at compile time and the
198 * sysctl debug.crypto is set to 1, the crypto system will
199 * accumulate statistics about how long it takes to process
200 * crypto requests at various points during processing.
201 */
202 struct cryptotstat cs_invoke; /* crypto_dipsatch -> crypto_invoke */
203 struct cryptotstat cs_done; /* crypto_invoke -> crypto_done */
204 struct cryptotstat cs_cb; /* crypto_done -> callback */
205 struct cryptotstat cs_finis; /* callback -> callback return */
206 };
207
208 #ifdef _KERNEL
209 /* Standard initialization structure beginning */
210 struct cryptoini {
211 int cri_alg; /* Algorithm to use */
212 int cri_klen; /* Key length, in bits */
213 int cri_rnd; /* Algorithm rounds, where relevant */
214 caddr_t cri_key; /* key to use */
215 u_int8_t cri_iv[EALG_MAX_BLOCK_LEN]; /* IV to use */
216 struct cryptoini *cri_next;
217 };
218
219 /* Describe boundaries of a single crypto operation */
220 struct cryptodesc {
221 int crd_skip; /* How many bytes to ignore from start */
222 int crd_len; /* How many bytes to process */
223 int crd_inject; /* Where to inject results, if applicable */
224 int crd_flags;
225
226 #define CRD_F_ENCRYPT 0x01 /* Set when doing encryption */
227 #define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in
228 place, so don't copy. */
229 #define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */
230 #define CRD_F_DSA_SHA_NEEDED 0x08 /* Compute SHA-1 of buffer for DSA */
231 #define CRD_F_COMP 0x0f /* Set when doing compression */
232
233 struct cryptoini CRD_INI; /* Initialization/context data */
234 #define crd_iv CRD_INI.cri_iv
235 #define crd_key CRD_INI.cri_key
236 #define crd_rnd CRD_INI.cri_rnd
237 #define crd_alg CRD_INI.cri_alg
238 #define crd_klen CRD_INI.cri_klen
239
240 struct cryptodesc *crd_next;
241 };
242
243 /* Structure describing complete operation */
244 struct cryptop {
245 TAILQ_ENTRY(cryptop) crp_next;
246
247 u_int64_t crp_sid; /* Session ID */
248 int crp_ilen; /* Input data total length */
249 int crp_olen; /* Result total length */
250
251 int crp_etype; /*
252 * Error type (zero means no error).
253 * All error codes except EAGAIN
254 * indicate possible data corruption (as in,
255 * the data have been touched). On all
256 * errors, the crp_sid may have changed
257 * (reset to a new one), so the caller
258 * should always check and use the new
259 * value on future requests.
260 */
261 int crp_flags;
262
263 #define CRYPTO_F_IMBUF 0x0001 /* Input/output are mbuf chains */
264 #define CRYPTO_F_IOV 0x0002 /* Input/output are uio */
265 #define CRYPTO_F_REL 0x0004 /* Must return data in same place */
266 #define CRYPTO_F_BATCH 0x0008 /* Batch op if possible possible */
267 #define CRYPTO_F_CBIMM 0x0010 /* Do callback immediately */
268 #define CRYPTO_F_DONE 0x0020 /* Operation completed */
269 #define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */
270
271 caddr_t crp_buf; /* Data to be processed */
272 caddr_t crp_opaque; /* Opaque pointer, passed along */
273 struct cryptodesc *crp_desc; /* Linked list of processing descriptors */
274
275 int (*crp_callback)(struct cryptop *); /* Callback function */
276
277 caddr_t crp_mac;
278 struct timespec crp_tstamp; /* performance time stamp */
279 };
280
281 #define CRYPTO_BUF_CONTIG 0x0
282 #define CRYPTO_BUF_IOV 0x1
283 #define CRYPTO_BUF_MBUF 0x2
284
285 #define CRYPTO_OP_DECRYPT 0x0
286 #define CRYPTO_OP_ENCRYPT 0x1
287
288 /*
289 * Hints passed to process methods.
290 */
291 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
292
293 struct cryptkop {
294 TAILQ_ENTRY(cryptkop) krp_next;
295
296 u_int krp_op; /* ie. CRK_MOD_EXP or other */
297 u_int krp_status; /* return status */
298 u_short krp_iparams; /* # of input parameters */
299 u_short krp_oparams; /* # of output parameters */
300 u_int32_t krp_hid;
301 struct crparam krp_param[CRK_MAXPARAM]; /* kvm */
302 int (*krp_callback)(struct cryptkop *);
303 };
304
305 /* Crypto capabilities structure */
306 struct cryptocap {
307 u_int32_t cc_sessions;
308
309 /*
310 * Largest possible operator length (in bits) for each type of
311 * encryption algorithm.
312 */
313 u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1];
314
315 u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1];
316
317 u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1];
318
319 u_int8_t cc_flags;
320 u_int8_t cc_qblocked; /* symmetric q blocked */
321 u_int8_t cc_kqblocked; /* asymmetric q blocked */
322 #define CRYPTOCAP_F_CLEANUP 0x01 /* needs resource cleanup */
323 #define CRYPTOCAP_F_SOFTWARE 0x02 /* software implementation */
324 #define CRYPTOCAP_F_SYNC 0x04 /* operates synchronously */
325
326 void *cc_arg; /* callback argument */
327 int (*cc_newsession)(void*, u_int32_t*, struct cryptoini*);
328 int (*cc_process) (void*, struct cryptop *, int);
329 int (*cc_freesession) (void*, u_int64_t);
330 void *cc_karg; /* callback argument */
331 int (*cc_kprocess) (void*, struct cryptkop *, int);
332 };
333
334 /*
335 * Session ids are 64 bits. The lower 32 bits contain a "local id" which
336 * is a driver-private session identifier. The upper 32 bits contain a
337 * "hardware id" used by the core crypto code to identify the driver and
338 * a copy of the driver's capabilities that can be used by client code to
339 * optimize operation.
340 */
341 #define CRYPTO_SESID2HID(_sid) (((_sid) >> 32) & 0xffffff)
342 #define CRYPTO_SESID2CAPS(_sid) (((_sid) >> 56) & 0xff)
343 #define CRYPTO_SESID2LID(_sid) (((u_int32_t) (_sid)) & 0xffffffff)
344
345 MALLOC_DECLARE(M_CRYPTO_DATA);
346
347 extern int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
348 extern int crypto_freesession(u_int64_t sid);
349 extern int32_t crypto_get_driverid(u_int32_t flags);
350 extern int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
351 u_int32_t flags,
352 int (*newses)(void*, u_int32_t*, struct cryptoini*),
353 int (*freeses)(void*, u_int64_t),
354 int (*process)(void*, struct cryptop *, int),
355 void *arg);
356 extern int crypto_kregister(u_int32_t, int, u_int32_t,
357 int (*)(void*, struct cryptkop *, int),
358 void *arg);
359 extern int crypto_unregister(u_int32_t driverid, int alg);
360 extern int crypto_unregister_all(u_int32_t driverid);
361 extern int crypto_dispatch(struct cryptop *crp);
362 extern int crypto_kdispatch(struct cryptkop *);
363 #define CRYPTO_SYMQ 0x1
364 #define CRYPTO_ASYMQ 0x2
365 extern int crypto_unblock(u_int32_t, int);
366 extern void crypto_done(struct cryptop *crp);
367 extern void crypto_kdone(struct cryptkop *);
368 extern int crypto_getfeat(int *);
369
370 void cuio_copydata(struct uio *, int, int, caddr_t);
371 void cuio_copyback(struct uio *, int, int, caddr_t);
372 int cuio_apply(struct uio *, int, int,
373 int (*f)(caddr_t, caddr_t, unsigned int), caddr_t);
374
375 extern void crypto_freereq(struct cryptop *crp);
376 extern struct cryptop *crypto_getreq(int num);
377
378 extern int crypto_usercrypto; /* userland may do crypto requests */
379 extern int crypto_userasymcrypto; /* userland may do asym crypto reqs */
380 extern int crypto_devallowsoft; /* only use hardware crypto */
381
382
383 /*
384 * initialize the crypto framework subsystem (not the pseudo-device).
385 * This must be called very early in boot, so the framework is ready
386 * to handle registration requests when crpto hardware is autoconfigured.
387 * (This declaration doesnt really belong here but there's no header
388 * for the raw framework.)
389 */
390 int crypto_init(void);
391
392 /*
393 * Crypto-related utility routines used mainly by drivers.
394 *
395 * XXX these don't really belong here; but for now they're
396 * kept apart from the rest of the system.
397 */
398 struct mbuf;
399 struct mbuf *m_getptr(struct mbuf *, int, int *);
400
401 struct uio;
402 extern void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
403 extern void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
404 #ifdef __FreeBSD__
405 extern struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
406 #else
407 extern int cuio_getptr(struct uio *, int loc, int *off);
408 #endif
409
410 #ifdef __FreeBSD__ /* Standalone m_apply()/m_getptr() */
411 extern int m_apply(struct mbuf *m, int off, int len,
412 int (*f)(caddr_t, caddr_t, unsigned int), caddr_t fstate);
413 extern struct mbuf * m_getptr(struct mbuf *m, int loc, int *off);
414 #endif /* Standalone m_apply()/m_getptr() */
415
416 #endif /* _KERNEL */
417 #endif /* _CRYPTO_CRYPTO_H_ */
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