1 /*
2 * Copyright (c) 2002 Bob Beck <beck@openbsd.org>
3 * Copyright (c) 2002 Theo de Raadt
4 * Copyright (c) 2002 Markus Friedl
5 * Copyright (c) 2008 Coyote Point Systems, Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29
30 #include <openssl/objects.h>
31 #include <openssl/engine.h>
32 #include <openssl/evp.h>
33 #include <openssl/bn.h>
34
35 #if (defined(__unix__) || defined(unix)) && !defined(USG) && \
36 (defined(OpenBSD) || defined(__FreeBSD__)) || defined(__NetBSD__)
37 # include <sys/param.h>
38 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041) || defined(__NetBSD__)
39 # ifndef HAVE_CRYPTODEV
40 # define HAVE_CRYPTODEV
41 # endif
42 # endif
43 # if (OpenBSD >= 200110)
44 # define HAVE_SYSLOG_R
45 # endif
46 #endif
47
48 #ifndef HAVE_CRYPTODEV
49
ENGINE_load_cryptodev(void)50 void ENGINE_load_cryptodev(void)
51 {
52 /* This is a NOP on platforms without /dev/crypto */
53 return;
54 }
55
56 #else
57
58 # include <sys/types.h>
59 # include <crypto/cryptodev.h>
60 # include <crypto/dh/dh.h>
61 # include <crypto/dsa/dsa.h>
62 # include <crypto/err/err.h>
63 # include <crypto/rsa/rsa.h>
64 # include <sys/ioctl.h>
65 # include <errno.h>
66 # include <stdio.h>
67 # include <unistd.h>
68 # include <fcntl.h>
69 # include <stdarg.h>
70 # include <syslog.h>
71 # include <errno.h>
72 # include <string.h>
73
74 struct dev_crypto_state {
75 struct session_op d_sess;
76 int d_fd;
77 # ifdef USE_CRYPTODEV_DIGESTS
78 char dummy_mac_key[HASH_MAX_LEN];
79 unsigned char digest_res[HASH_MAX_LEN];
80 char *mac_data;
81 int mac_len;
82 # endif
83 };
84
85 static u_int32_t cryptodev_asymfeat = 0;
86
87 static int open_dev_crypto(void);
88 static int get_dev_crypto(void);
89 static int get_cryptodev_ciphers(const int **cnids);
90 # ifdef USE_CRYPTODEV_DIGESTS
91 static int get_cryptodev_digests(const int **cnids);
92 # endif
93 static int cryptodev_usable_ciphers(const int **nids);
94 static int cryptodev_usable_digests(const int **nids);
95 static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
96 const unsigned char *in, size_t inl);
97 static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
98 const unsigned char *iv, int enc);
99 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
100 static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
101 const int **nids, int nid);
102 static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
103 const int **nids, int nid);
104 static int bn2crparam(const BIGNUM *a, struct crparam *crp);
105 static int crparam2bn(struct crparam *crp, BIGNUM *a);
106 static void zapparams(struct crypt_kop *kop);
107 static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
108 int slen, BIGNUM *s);
109
110 static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
111 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
112 BN_MONT_CTX *m_ctx);
113 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
114 BN_CTX *ctx);
115 static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
116 BN_CTX *ctx);
117 static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
118 const BIGNUM *p, const BIGNUM *m,
119 BN_CTX *ctx, BN_MONT_CTX *m_ctx);
120 static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
121 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2,
122 BIGNUM *p, BN_CTX *ctx,
123 BN_MONT_CTX *mont);
124 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen,
125 DSA *dsa);
126 static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
127 DSA_SIG *sig, DSA *dsa);
128 static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
129 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
130 BN_MONT_CTX *m_ctx);
131 static int cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key,
132 DH *dh);
133 static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
134 void (*f) (void));
135 void ENGINE_load_cryptodev(void);
136
137 static const ENGINE_CMD_DEFN cryptodev_defns[] = {
138 {0, NULL, NULL, 0}
139 };
140
141 static struct {
142 int id;
143 int nid;
144 int ivmax;
145 int keylen;
146 } ciphers[] = {
147 {
148 CRYPTO_ARC4, NID_rc4, 0, 16,
149 },
150 {
151 CRYPTO_DES_CBC, NID_des_cbc, 8, 8,
152 },
153 {
154 CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24,
155 },
156 {
157 CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16,
158 },
159 {
160 CRYPTO_AES_CBC, NID_aes_192_cbc, 16, 24,
161 },
162 {
163 CRYPTO_AES_CBC, NID_aes_256_cbc, 16, 32,
164 },
165 {
166 CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16,
167 },
168 {
169 CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16,
170 },
171 {
172 CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0,
173 },
174 {
175 0, NID_undef, 0, 0,
176 },
177 };
178
179 # ifdef USE_CRYPTODEV_DIGESTS
180 static struct {
181 int id;
182 int nid;
183 int keylen;
184 } digests[] = {
185 {
186 CRYPTO_MD5_HMAC, NID_hmacWithMD5, 16
187 },
188 {
189 CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, 20
190 },
191 {
192 CRYPTO_RIPEMD160_HMAC, NID_ripemd160, 16
193 /* ? */
194 },
195 {
196 CRYPTO_MD5_KPDK, NID_undef, 0
197 },
198 {
199 CRYPTO_SHA1_KPDK, NID_undef, 0
200 },
201 {
202 CRYPTO_MD5, NID_md5, 16
203 },
204 {
205 CRYPTO_SHA1, NID_sha1, 20
206 },
207 {
208 0, NID_undef, 0
209 },
210 };
211 # endif
212
213 /*
214 * Return a fd if /dev/crypto seems usable, 0 otherwise.
215 */
open_dev_crypto(void)216 static int open_dev_crypto(void)
217 {
218 static int fd = -1;
219
220 if (fd == -1) {
221 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
222 return (-1);
223 /* close on exec */
224 if (fcntl(fd, F_SETFD, 1) == -1) {
225 close(fd);
226 fd = -1;
227 return (-1);
228 }
229 }
230 return (fd);
231 }
232
get_dev_crypto(void)233 static int get_dev_crypto(void)
234 {
235 int fd, retfd;
236
237 if ((fd = open_dev_crypto()) == -1)
238 return (-1);
239 # ifndef CRIOGET_NOT_NEEDED
240 if (ioctl(fd, CRIOGET, &retfd) == -1)
241 return (-1);
242
243 /* close on exec */
244 if (fcntl(retfd, F_SETFD, 1) == -1) {
245 close(retfd);
246 return (-1);
247 }
248 # else
249 retfd = fd;
250 # endif
251 return (retfd);
252 }
253
put_dev_crypto(int fd)254 static void put_dev_crypto(int fd)
255 {
256 # ifndef CRIOGET_NOT_NEEDED
257 close(fd);
258 # endif
259 }
260
261 /* Caching version for asym operations */
get_asym_dev_crypto(void)262 static int get_asym_dev_crypto(void)
263 {
264 static int fd = -1;
265
266 if (fd == -1)
267 fd = open_dev_crypto();
268 return fd;
269 }
270
271 /*
272 * Find out what ciphers /dev/crypto will let us have a session for.
273 * XXX note, that some of these openssl doesn't deal with yet!
274 * returning them here is harmless, as long as we return NULL
275 * when asked for a handler in the cryptodev_engine_ciphers routine
276 */
get_cryptodev_ciphers(const int ** cnids)277 static int get_cryptodev_ciphers(const int **cnids)
278 {
279 static int nids[CRYPTO_ALGORITHM_MAX];
280 struct session_op sess;
281 int fd, i, count = 0;
282
283 if ((fd = get_dev_crypto()) < 0) {
284 *cnids = NULL;
285 return (0);
286 }
287 memset(&sess, 0, sizeof(sess));
288 sess.key = (void *) "123456789abcdefghijklmno";
289
290 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
291 if (ciphers[i].nid == NID_undef)
292 continue;
293 sess.cipher = ciphers[i].id;
294 sess.keylen = ciphers[i].keylen;
295 sess.mac = 0;
296 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
297 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
298 nids[count++] = ciphers[i].nid;
299 }
300 put_dev_crypto(fd);
301
302 if (count > 0)
303 *cnids = nids;
304 else
305 *cnids = NULL;
306 return (count);
307 }
308
309 # ifdef USE_CRYPTODEV_DIGESTS
310 /*
311 * Find out what digests /dev/crypto will let us have a session for.
312 * XXX note, that some of these openssl doesn't deal with yet!
313 * returning them here is harmless, as long as we return NULL
314 * when asked for a handler in the cryptodev_engine_digests routine
315 */
get_cryptodev_digests(const int ** cnids)316 static int get_cryptodev_digests(const int **cnids)
317 {
318 static int nids[CRYPTO_ALGORITHM_MAX];
319 struct session_op sess;
320 int fd, i, count = 0;
321
322 if ((fd = get_dev_crypto()) < 0) {
323 *cnids = NULL;
324 return (0);
325 }
326 memset(&sess, 0, sizeof(sess));
327 sess.mackey = (void *) "123456789abcdefghijklmno";
328 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
329 if (digests[i].nid == NID_undef)
330 continue;
331 sess.mac = digests[i].id;
332 sess.mackeylen = digests[i].keylen;
333 sess.cipher = 0;
334 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
335 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
336 nids[count++] = digests[i].nid;
337 }
338 put_dev_crypto(fd);
339
340 if (count > 0)
341 *cnids = nids;
342 else
343 *cnids = NULL;
344 return (count);
345 }
346 # endif /* 0 */
347
348 /*
349 * Find the useable ciphers|digests from dev/crypto - this is the first
350 * thing called by the engine init crud which determines what it
351 * can use for ciphers from this engine. We want to return
352 * only what we can do, anythine else is handled by software.
353 *
354 * If we can't initialize the device to do anything useful for
355 * any reason, we want to return a NULL array, and 0 length,
356 * which forces everything to be done is software. By putting
357 * the initalization of the device in here, we ensure we can
358 * use this engine as the default, and if for whatever reason
359 * /dev/crypto won't do what we want it will just be done in
360 * software
361 *
362 * This can (should) be greatly expanded to perhaps take into
363 * account speed of the device, and what we want to do.
364 * (although the disabling of particular alg's could be controlled
365 * by the device driver with sysctl's.) - this is where we
366 * want most of the decisions made about what we actually want
367 * to use from /dev/crypto.
368 */
cryptodev_usable_ciphers(const int ** nids)369 static int cryptodev_usable_ciphers(const int **nids)
370 {
371 return (get_cryptodev_ciphers(nids));
372 }
373
cryptodev_usable_digests(const int ** nids)374 static int cryptodev_usable_digests(const int **nids)
375 {
376 # ifdef USE_CRYPTODEV_DIGESTS
377 return (get_cryptodev_digests(nids));
378 # else
379 /*
380 * XXXX just disable all digests for now, because it sucks.
381 * we need a better way to decide this - i.e. I may not
382 * want digests on slow cards like hifn on fast machines,
383 * but might want them on slow or loaded machines, etc.
384 * will also want them when using crypto cards that don't
385 * suck moose gonads - would be nice to be able to decide something
386 * as reasonable default without having hackery that's card dependent.
387 * of course, the default should probably be just do everything,
388 * with perhaps a sysctl to turn algoritms off (or have them off
389 * by default) on cards that generally suck like the hifn.
390 */
391 *nids = NULL;
392 return (0);
393 # endif
394 }
395
396 static int
cryptodev_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)397 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
398 const unsigned char *in, size_t inl)
399 {
400 struct crypt_op cryp;
401 struct dev_crypto_state *state = ctx->cipher_data;
402 struct session_op *sess = &state->d_sess;
403 const void *iiv;
404 unsigned char save_iv[EVP_MAX_IV_LENGTH];
405
406 if (state->d_fd < 0)
407 return (0);
408 if (!inl)
409 return (1);
410 if ((inl % ctx->cipher->block_size) != 0)
411 return (0);
412
413 memset(&cryp, 0, sizeof(cryp));
414
415 cryp.ses = sess->ses;
416 cryp.flags = 0;
417 cryp.len = inl;
418 cryp.src = (void *) in;
419 cryp.dst = (void *) out;
420 cryp.mac = 0;
421
422 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
423
424 if (ctx->cipher->iv_len) {
425 cryp.iv = (void *) ctx->iv;
426 if (!ctx->encrypt) {
427 iiv = in + inl - ctx->cipher->iv_len;
428 memcpy(save_iv, iiv, ctx->cipher->iv_len);
429 }
430 } else
431 cryp.iv = NULL;
432
433 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
434 /*
435 * XXX need better errror handling this can fail for a number of
436 * different reasons.
437 */
438 return (0);
439 }
440
441 if (ctx->cipher->iv_len) {
442 if (ctx->encrypt)
443 iiv = out + inl - ctx->cipher->iv_len;
444 else
445 iiv = save_iv;
446 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
447 }
448 return (1);
449 }
450
451 static int
cryptodev_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)452 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
453 const unsigned char *iv, int enc)
454 {
455 struct dev_crypto_state *state = ctx->cipher_data;
456 struct session_op *sess = &state->d_sess;
457 int cipher = -1, i;
458
459 for (i = 0; ciphers[i].id; i++)
460 if (ctx->cipher->nid == ciphers[i].nid &&
461 ctx->cipher->iv_len <= ciphers[i].ivmax &&
462 ctx->key_len == ciphers[i].keylen) {
463 cipher = ciphers[i].id;
464 break;
465 }
466
467 if (!ciphers[i].id) {
468 state->d_fd = -1;
469 return (0);
470 }
471
472 memset(sess, 0, sizeof(struct session_op));
473
474 if ((state->d_fd = get_dev_crypto()) < 0)
475 return (0);
476
477 sess->key = (void *) key;
478 sess->keylen = ctx->key_len;
479 sess->cipher = cipher;
480
481 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
482 put_dev_crypto(state->d_fd);
483 state->d_fd = -1;
484 return (0);
485 }
486 return (1);
487 }
488
489 /*
490 * free anything we allocated earlier when initting a
491 * session, and close the session.
492 */
cryptodev_cleanup(EVP_CIPHER_CTX * ctx)493 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
494 {
495 int ret = 0;
496 struct dev_crypto_state *state = ctx->cipher_data;
497 struct session_op *sess = &state->d_sess;
498
499 if (state->d_fd < 0)
500 return (0);
501
502 /*
503 * XXX if this ioctl fails, someting's wrong. the invoker may have called
504 * us with a bogus ctx, or we could have a device that for whatever
505 * reason just doesn't want to play ball - it's not clear what's right
506 * here - should this be an error? should it just increase a counter,
507 * hmm. For right now, we return 0 - I don't believe that to be "right".
508 * we could call the gorpy openssl lib error handlers that print messages
509 * to users of the library. hmm..
510 */
511
512 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
513 ret = 0;
514 } else {
515 ret = 1;
516 }
517 put_dev_crypto(state->d_fd);
518 state->d_fd = -1;
519
520 return (ret);
521 }
522
523 /*
524 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
525 * gets called when libcrypto requests a cipher NID.
526 */
527
528 /* RC4 */
529 const EVP_CIPHER cryptodev_rc4 = {
530 NID_rc4,
531 1, 16, 0,
532 EVP_CIPH_VARIABLE_LENGTH,
533 cryptodev_init_key,
534 cryptodev_cipher,
535 cryptodev_cleanup,
536 sizeof(struct dev_crypto_state),
537 NULL,
538 NULL,
539 NULL
540 };
541
542 /* DES CBC EVP */
543 const EVP_CIPHER cryptodev_des_cbc = {
544 NID_des_cbc,
545 8, 8, 8,
546 EVP_CIPH_CBC_MODE,
547 cryptodev_init_key,
548 cryptodev_cipher,
549 cryptodev_cleanup,
550 sizeof(struct dev_crypto_state),
551 EVP_CIPHER_set_asn1_iv,
552 EVP_CIPHER_get_asn1_iv,
553 NULL
554 };
555
556 /* 3DES CBC EVP */
557 const EVP_CIPHER cryptodev_3des_cbc = {
558 NID_des_ede3_cbc,
559 8, 24, 8,
560 EVP_CIPH_CBC_MODE,
561 cryptodev_init_key,
562 cryptodev_cipher,
563 cryptodev_cleanup,
564 sizeof(struct dev_crypto_state),
565 EVP_CIPHER_set_asn1_iv,
566 EVP_CIPHER_get_asn1_iv,
567 NULL
568 };
569
570 const EVP_CIPHER cryptodev_bf_cbc = {
571 NID_bf_cbc,
572 8, 16, 8,
573 EVP_CIPH_CBC_MODE,
574 cryptodev_init_key,
575 cryptodev_cipher,
576 cryptodev_cleanup,
577 sizeof(struct dev_crypto_state),
578 EVP_CIPHER_set_asn1_iv,
579 EVP_CIPHER_get_asn1_iv,
580 NULL
581 };
582
583 const EVP_CIPHER cryptodev_cast_cbc = {
584 NID_cast5_cbc,
585 8, 16, 8,
586 EVP_CIPH_CBC_MODE,
587 cryptodev_init_key,
588 cryptodev_cipher,
589 cryptodev_cleanup,
590 sizeof(struct dev_crypto_state),
591 EVP_CIPHER_set_asn1_iv,
592 EVP_CIPHER_get_asn1_iv,
593 NULL
594 };
595
596 const EVP_CIPHER cryptodev_aes_cbc = {
597 NID_aes_128_cbc,
598 16, 16, 16,
599 EVP_CIPH_CBC_MODE,
600 cryptodev_init_key,
601 cryptodev_cipher,
602 cryptodev_cleanup,
603 sizeof(struct dev_crypto_state),
604 EVP_CIPHER_set_asn1_iv,
605 EVP_CIPHER_get_asn1_iv,
606 NULL
607 };
608
609 const EVP_CIPHER cryptodev_aes_192_cbc = {
610 NID_aes_192_cbc,
611 16, 24, 16,
612 EVP_CIPH_CBC_MODE,
613 cryptodev_init_key,
614 cryptodev_cipher,
615 cryptodev_cleanup,
616 sizeof(struct dev_crypto_state),
617 EVP_CIPHER_set_asn1_iv,
618 EVP_CIPHER_get_asn1_iv,
619 NULL
620 };
621
622 const EVP_CIPHER cryptodev_aes_256_cbc = {
623 NID_aes_256_cbc,
624 16, 32, 16,
625 EVP_CIPH_CBC_MODE,
626 cryptodev_init_key,
627 cryptodev_cipher,
628 cryptodev_cleanup,
629 sizeof(struct dev_crypto_state),
630 EVP_CIPHER_set_asn1_iv,
631 EVP_CIPHER_get_asn1_iv,
632 NULL
633 };
634
635 /*
636 * Registered by the ENGINE when used to find out how to deal with
637 * a particular NID in the ENGINE. this says what we'll do at the
638 * top level - note, that list is restricted by what we answer with
639 */
640 static int
cryptodev_engine_ciphers(ENGINE * e,const EVP_CIPHER ** cipher,const int ** nids,int nid)641 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
642 const int **nids, int nid)
643 {
644 if (!cipher)
645 return (cryptodev_usable_ciphers(nids));
646
647 switch (nid) {
648 case NID_rc4:
649 *cipher = &cryptodev_rc4;
650 break;
651 case NID_des_ede3_cbc:
652 *cipher = &cryptodev_3des_cbc;
653 break;
654 case NID_des_cbc:
655 *cipher = &cryptodev_des_cbc;
656 break;
657 case NID_bf_cbc:
658 *cipher = &cryptodev_bf_cbc;
659 break;
660 case NID_cast5_cbc:
661 *cipher = &cryptodev_cast_cbc;
662 break;
663 case NID_aes_128_cbc:
664 *cipher = &cryptodev_aes_cbc;
665 break;
666 case NID_aes_192_cbc:
667 *cipher = &cryptodev_aes_192_cbc;
668 break;
669 case NID_aes_256_cbc:
670 *cipher = &cryptodev_aes_256_cbc;
671 break;
672 default:
673 *cipher = NULL;
674 break;
675 }
676 return (*cipher != NULL);
677 }
678
679 # ifdef USE_CRYPTODEV_DIGESTS
680
681 /* convert digest type to cryptodev */
digest_nid_to_cryptodev(int nid)682 static int digest_nid_to_cryptodev(int nid)
683 {
684 int i;
685
686 for (i = 0; digests[i].id; i++)
687 if (digests[i].nid == nid)
688 return (digests[i].id);
689 return (0);
690 }
691
digest_key_length(int nid)692 static int digest_key_length(int nid)
693 {
694 int i;
695
696 for (i = 0; digests[i].id; i++)
697 if (digests[i].nid == nid)
698 return digests[i].keylen;
699 return (0);
700 }
701
cryptodev_digest_init(EVP_MD_CTX * ctx)702 static int cryptodev_digest_init(EVP_MD_CTX *ctx)
703 {
704 struct dev_crypto_state *state = ctx->md_data;
705 struct session_op *sess = &state->d_sess;
706 int digest;
707
708 if ((digest = digest_nid_to_cryptodev(ctx->digest->type)) == NID_undef) {
709 printf("cryptodev_digest_init: Can't get digest \n");
710 return (0);
711 }
712
713 memset(state, 0, sizeof(struct dev_crypto_state));
714
715 if ((state->d_fd = get_dev_crypto()) < 0) {
716 printf("cryptodev_digest_init: Can't get Dev \n");
717 return (0);
718 }
719
720 sess->mackey = state->dummy_mac_key;
721 sess->mackeylen = digest_key_length(ctx->digest->type);
722 sess->mac = digest;
723
724 if (ioctl(state->d_fd, CIOCGSESSION, sess) < 0) {
725 put_dev_crypto(state->d_fd);
726 state->d_fd = -1;
727 printf("cryptodev_digest_init: Open session failed\n");
728 return (0);
729 }
730
731 return (1);
732 }
733
cryptodev_digest_update(EVP_MD_CTX * ctx,const void * data,size_t count)734 static int cryptodev_digest_update(EVP_MD_CTX *ctx, const void *data,
735 size_t count)
736 {
737 struct crypt_op cryp;
738 struct dev_crypto_state *state = ctx->md_data;
739 struct session_op *sess = &state->d_sess;
740
741 if (!data || state->d_fd < 0) {
742 printf("cryptodev_digest_update: illegal inputs \n");
743 return (0);
744 }
745
746 if (!count) {
747 return (0);
748 }
749
750 if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) {
751 /* if application doesn't support one buffer */
752 state->mac_data =
753 OPENSSL_realloc(state->mac_data, state->mac_len + count);
754
755 if (!state->mac_data) {
756 printf("cryptodev_digest_update: realloc failed\n");
757 return (0);
758 }
759
760 memcpy(state->mac_data + state->mac_len, data, count);
761 state->mac_len += count;
762
763 return (1);
764 }
765
766 memset(&cryp, 0, sizeof(cryp));
767
768 cryp.ses = sess->ses;
769 cryp.flags = 0;
770 cryp.len = count;
771 cryp.src = (void *) data;
772 cryp.dst = NULL;
773 cryp.mac = (void *) state->digest_res;
774 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) {
775 printf("cryptodev_digest_update: digest failed\n");
776 return (0);
777 }
778 return (1);
779 }
780
cryptodev_digest_final(EVP_MD_CTX * ctx,unsigned char * md)781 static int cryptodev_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
782 {
783 struct crypt_op cryp;
784 struct dev_crypto_state *state = ctx->md_data;
785 struct session_op *sess = &state->d_sess;
786
787 int ret = 1;
788
789 if (!md || state->d_fd < 0) {
790 printf("cryptodev_digest_final: illegal input\n");
791 return (0);
792 }
793
794 if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) {
795 /* if application doesn't support one buffer */
796 memset(&cryp, 0, sizeof(cryp));
797 cryp.ses = sess->ses;
798 cryp.flags = 0;
799 cryp.len = state->mac_len;
800 cryp.src = state->mac_data;
801 cryp.dst = NULL;
802 cryp.mac = (caddr_t) md;
803 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) {
804 printf("cryptodev_digest_final: digest failed\n");
805 return (0);
806 }
807
808 return 1;
809 }
810
811 memcpy(md, state->digest_res, ctx->digest->md_size);
812
813 return (ret);
814 }
815
cryptodev_digest_cleanup(EVP_MD_CTX * ctx)816 static int cryptodev_digest_cleanup(EVP_MD_CTX *ctx)
817 {
818 int ret = 1;
819 struct dev_crypto_state *state = ctx->md_data;
820 struct session_op *sess = &state->d_sess;
821
822 if (state == NULL)
823 return 0;
824
825 if (state->d_fd < 0) {
826 printf("cryptodev_digest_cleanup: illegal input\n");
827 return (0);
828 }
829
830 if (state->mac_data) {
831 OPENSSL_free(state->mac_data);
832 state->mac_data = NULL;
833 state->mac_len = 0;
834 }
835
836 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) < 0) {
837 printf("cryptodev_digest_cleanup: failed to close session\n");
838 ret = 0;
839 } else {
840 ret = 1;
841 }
842 put_dev_crypto(state->d_fd);
843 state->d_fd = -1;
844
845 return (ret);
846 }
847
cryptodev_digest_copy(EVP_MD_CTX * to,const EVP_MD_CTX * from)848 static int cryptodev_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
849 {
850 struct dev_crypto_state *fstate = from->md_data;
851 struct dev_crypto_state *dstate = to->md_data;
852 struct session_op *sess;
853 int digest;
854
855 if (dstate == NULL || fstate == NULL)
856 return 1;
857
858 memcpy(dstate, fstate, sizeof(struct dev_crypto_state));
859
860 sess = &dstate->d_sess;
861
862 digest = digest_nid_to_cryptodev(to->digest->type);
863
864 sess->mackey = dstate->dummy_mac_key;
865 sess->mackeylen = digest_key_length(to->digest->type);
866 sess->mac = digest;
867
868 dstate->d_fd = get_dev_crypto();
869
870 if (ioctl(dstate->d_fd, CIOCGSESSION, sess) < 0) {
871 put_dev_crypto(dstate->d_fd);
872 dstate->d_fd = -1;
873 printf("cryptodev_digest_init: Open session failed\n");
874 return (0);
875 }
876
877 if (fstate->mac_len != 0) {
878 if (fstate->mac_data != NULL) {
879 dstate->mac_data = OPENSSL_malloc(fstate->mac_len);
880 memcpy(dstate->mac_data, fstate->mac_data, fstate->mac_len);
881 dstate->mac_len = fstate->mac_len;
882 }
883 }
884
885 return 1;
886 }
887
888 const EVP_MD cryptodev_sha1 = {
889 NID_sha1,
890 NID_undef,
891 SHA_DIGEST_LENGTH,
892 EVP_MD_FLAG_ONESHOT,
893 cryptodev_digest_init,
894 cryptodev_digest_update,
895 cryptodev_digest_final,
896 cryptodev_digest_copy,
897 cryptodev_digest_cleanup,
898 EVP_PKEY_NULL_method,
899 SHA_CBLOCK,
900 sizeof(struct dev_crypto_state),
901 };
902
903 const EVP_MD cryptodev_md5 = {
904 NID_md5,
905 NID_undef,
906 16 /* MD5_DIGEST_LENGTH */ ,
907 EVP_MD_FLAG_ONESHOT,
908 cryptodev_digest_init,
909 cryptodev_digest_update,
910 cryptodev_digest_final,
911 cryptodev_digest_copy,
912 cryptodev_digest_cleanup,
913 EVP_PKEY_NULL_method,
914 64 /* MD5_CBLOCK */ ,
915 sizeof(struct dev_crypto_state),
916 };
917
918 # endif /* USE_CRYPTODEV_DIGESTS */
919
920 static int
cryptodev_engine_digests(ENGINE * e,const EVP_MD ** digest,const int ** nids,int nid)921 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
922 const int **nids, int nid)
923 {
924 if (!digest)
925 return (cryptodev_usable_digests(nids));
926
927 switch (nid) {
928 # ifdef USE_CRYPTODEV_DIGESTS
929 case NID_md5:
930 *digest = &cryptodev_md5;
931 break;
932 case NID_sha1:
933 *digest = &cryptodev_sha1;
934 break;
935 default:
936 # endif /* USE_CRYPTODEV_DIGESTS */
937 *digest = NULL;
938 break;
939 }
940 return (*digest != NULL);
941 }
942
943 /*
944 * Convert a BIGNUM to the representation that /dev/crypto needs.
945 * Upon completion of use, the caller is responsible for freeing
946 * crp->crp_p.
947 */
bn2crparam(const BIGNUM * a,struct crparam * crp)948 static int bn2crparam(const BIGNUM *a, struct crparam *crp)
949 {
950 int i, j, k;
951 ssize_t bytes, bits;
952 u_char *b;
953
954 crp->crp_p = NULL;
955 crp->crp_nbits = 0;
956
957 bits = BN_num_bits(a);
958 bytes = (bits + 7) / 8;
959
960 b = malloc(bytes);
961 if (b == NULL)
962 return (1);
963 memset(b, 0, bytes);
964
965 crp->crp_p = (void *) b;
966 crp->crp_nbits = bits;
967
968 for (i = 0, j = 0; i < a->top; i++) {
969 for (k = 0; k < BN_BITS2 / 8; k++) {
970 if ((j + k) >= bytes)
971 return (0);
972 b[j + k] = a->d[i] >> (k * 8);
973 }
974 j += BN_BITS2 / 8;
975 }
976 return (0);
977 }
978
979 /* Convert a /dev/crypto parameter to a BIGNUM */
crparam2bn(struct crparam * crp,BIGNUM * a)980 static int crparam2bn(struct crparam *crp, BIGNUM *a)
981 {
982 u_int8_t *pd;
983 int i, bytes;
984
985 bytes = (crp->crp_nbits + 7) / 8;
986
987 if (bytes == 0)
988 return (-1);
989
990 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
991 return (-1);
992
993 for (i = 0; i < bytes; i++)
994 pd[i] = ((char *)crp->crp_p)[bytes - i - 1];
995
996 BN_bin2bn(pd, bytes, a);
997 free(pd);
998
999 return (0);
1000 }
1001
zapparams(struct crypt_kop * kop)1002 static void zapparams(struct crypt_kop *kop)
1003 {
1004 int i;
1005
1006 for (i = 0; i < kop->crk_iparams + kop->crk_oparams; i++) {
1007 if (kop->crk_param[i].crp_p)
1008 free(kop->crk_param[i].crp_p);
1009 kop->crk_param[i].crp_p = NULL;
1010 kop->crk_param[i].crp_nbits = 0;
1011 }
1012 }
1013
1014 static int
cryptodev_asym(struct crypt_kop * kop,int rlen,BIGNUM * r,int slen,BIGNUM * s)1015 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen,
1016 BIGNUM *s)
1017 {
1018 int fd, ret = -1;
1019
1020 if ((fd = get_dev_crypto()) < 0)
1021 return (ret);
1022
1023 if (r) {
1024 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
1025 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
1026 kop->crk_oparams++;
1027 }
1028 if (s) {
1029 kop->crk_param[kop->crk_iparams + 1].crp_p =
1030 calloc(slen, sizeof(char));
1031 kop->crk_param[kop->crk_iparams + 1].crp_nbits = slen * 8;
1032 kop->crk_oparams++;
1033 }
1034
1035 if (ioctl(fd, CIOCKEY, kop) == 0) {
1036 if (r)
1037 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
1038 if (s)
1039 crparam2bn(&kop->crk_param[kop->crk_iparams + 1], s);
1040 ret = 0;
1041 }
1042
1043 return (ret);
1044 }
1045
1046 static int
cryptodev_bn_mod_exp(BIGNUM * r,const BIGNUM * a,const BIGNUM * p,const BIGNUM * m,BN_CTX * ctx,BN_MONT_CTX * in_mont)1047 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
1048 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
1049 {
1050 struct crypt_kop kop;
1051 int ret = 1;
1052
1053 /*
1054 * Currently, we know we can do mod exp iff we can do any asymmetric
1055 * operations at all.
1056 */
1057 if (cryptodev_asymfeat == 0) {
1058 ret = BN_mod_exp(r, a, p, m, ctx);
1059 return (ret);
1060 }
1061
1062 memset(&kop, 0, sizeof kop);
1063 kop.crk_op = CRK_MOD_EXP;
1064
1065 /* inputs: a^p % m */
1066 if (bn2crparam(a, &kop.crk_param[0]))
1067 goto err;
1068 if (bn2crparam(p, &kop.crk_param[1]))
1069 goto err;
1070 if (bn2crparam(m, &kop.crk_param[2]))
1071 goto err;
1072 kop.crk_iparams = 3;
1073
1074 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL)) {
1075 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1076 printf("OCF asym process failed, Running in software\n");
1077 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
1078
1079 } else if (ECANCELED == kop.crk_status) {
1080 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1081 printf("OCF hardware operation cancelled. Running in Software\n");
1082 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
1083 }
1084 /* else cryptodev operation worked ok ==> ret = 1 */
1085
1086 err:
1087 zapparams(&kop);
1088 return (ret);
1089 }
1090
1091 static int
cryptodev_rsa_nocrt_mod_exp(BIGNUM * r0,const BIGNUM * I,RSA * rsa,BN_CTX * ctx)1092 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
1093 BN_CTX *ctx)
1094 {
1095 int r;
1096 ctx = BN_CTX_new();
1097 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
1098 BN_CTX_free(ctx);
1099 return (r);
1100 }
1101
1102 static int
cryptodev_rsa_mod_exp(BIGNUM * r0,const BIGNUM * I,RSA * rsa,BN_CTX * ctx)1103 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
1104 {
1105 struct crypt_kop kop;
1106 int ret = 1;
1107
1108 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
1109 /* XXX 0 means failure?? */
1110 return (0);
1111 }
1112
1113 memset(&kop, 0, sizeof kop);
1114 kop.crk_op = CRK_MOD_EXP_CRT;
1115 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
1116 if (bn2crparam(rsa->p, &kop.crk_param[0]))
1117 goto err;
1118 if (bn2crparam(rsa->q, &kop.crk_param[1]))
1119 goto err;
1120 if (bn2crparam(I, &kop.crk_param[2]))
1121 goto err;
1122 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
1123 goto err;
1124 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
1125 goto err;
1126 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
1127 goto err;
1128 kop.crk_iparams = 6;
1129
1130 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL)) {
1131 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1132 printf("OCF asym process failed, running in Software\n");
1133 ret = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
1134
1135 } else if (ECANCELED == kop.crk_status) {
1136 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1137 printf("OCF hardware operation cancelled. Running in Software\n");
1138 ret = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
1139 }
1140 /* else cryptodev operation worked ok ==> ret = 1 */
1141
1142 err:
1143 zapparams(&kop);
1144 return (ret);
1145 }
1146
1147 static RSA_METHOD cryptodev_rsa = {
1148 "cryptodev RSA method",
1149 NULL, /* rsa_pub_enc */
1150 NULL, /* rsa_pub_dec */
1151 NULL, /* rsa_priv_enc */
1152 NULL, /* rsa_priv_dec */
1153 NULL,
1154 NULL,
1155 NULL, /* init */
1156 NULL, /* finish */
1157 0, /* flags */
1158 NULL, /* app_data */
1159 NULL, /* rsa_sign */
1160 NULL /* rsa_verify */
1161 };
1162
1163 static int
cryptodev_dsa_bn_mod_exp(DSA * dsa,BIGNUM * r,BIGNUM * a,const BIGNUM * p,const BIGNUM * m,BN_CTX * ctx,BN_MONT_CTX * m_ctx)1164 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
1165 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
1166 {
1167 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1168 }
1169
1170 static int
cryptodev_dsa_dsa_mod_exp(DSA * dsa,BIGNUM * t1,BIGNUM * g,BIGNUM * u1,BIGNUM * pub_key,BIGNUM * u2,BIGNUM * p,BN_CTX * ctx,BN_MONT_CTX * mont)1171 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
1172 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
1173 BN_CTX *ctx, BN_MONT_CTX *mont)
1174 {
1175 BIGNUM t2;
1176 int ret = 0;
1177
1178 BN_init(&t2);
1179
1180 /* v = ( g^u1 * y^u2 mod p ) mod q */
1181 /* let t1 = g ^ u1 mod p */
1182 ret = 0;
1183
1184 if (!dsa->meth->bn_mod_exp(dsa, t1, dsa->g, u1, dsa->p, ctx, mont))
1185 goto err;
1186
1187 /* let t2 = y ^ u2 mod p */
1188 if (!dsa->meth->bn_mod_exp(dsa, &t2, dsa->pub_key, u2, dsa->p, ctx, mont))
1189 goto err;
1190 /* let u1 = t1 * t2 mod p */
1191 if (!BN_mod_mul(u1, t1, &t2, dsa->p, ctx))
1192 goto err;
1193
1194 BN_copy(t1, u1);
1195
1196 ret = 1;
1197 err:
1198 BN_free(&t2);
1199 return (ret);
1200 }
1201
cryptodev_dsa_do_sign(const unsigned char * dgst,int dlen,DSA * dsa)1202 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen,
1203 DSA *dsa)
1204 {
1205 struct crypt_kop kop;
1206 BIGNUM *r = NULL, *s = NULL;
1207 DSA_SIG *dsaret = NULL;
1208
1209 if ((r = BN_new()) == NULL)
1210 goto err;
1211 if ((s = BN_new()) == NULL) {
1212 BN_free(r);
1213 goto err;
1214 }
1215
1216 memset(&kop, 0, sizeof kop);
1217 kop.crk_op = CRK_DSA_SIGN;
1218
1219 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
1220 kop.crk_param[0].crp_p = (void *) dgst;
1221 kop.crk_param[0].crp_nbits = dlen * 8;
1222 if (bn2crparam(dsa->p, &kop.crk_param[1]))
1223 goto err;
1224 if (bn2crparam(dsa->q, &kop.crk_param[2]))
1225 goto err;
1226 if (bn2crparam(dsa->g, &kop.crk_param[3]))
1227 goto err;
1228 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
1229 goto err;
1230 kop.crk_iparams = 5;
1231
1232 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
1233 BN_num_bytes(dsa->q), s) == 0) {
1234 dsaret = DSA_SIG_new();
1235 dsaret->r = r;
1236 dsaret->s = s;
1237 } else {
1238 const DSA_METHOD *meth = DSA_OpenSSL();
1239 BN_free(r);
1240 BN_free(s);
1241 dsaret = (meth->dsa_do_sign) (dgst, dlen, dsa);
1242 }
1243 err:
1244 kop.crk_param[0].crp_p = NULL;
1245 zapparams(&kop);
1246 return (dsaret);
1247 }
1248
1249 static int
cryptodev_dsa_verify(const unsigned char * dgst,int dlen,DSA_SIG * sig,DSA * dsa)1250 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
1251 DSA_SIG *sig, DSA *dsa)
1252 {
1253 struct crypt_kop kop;
1254 int dsaret = 1;
1255
1256 memset(&kop, 0, sizeof kop);
1257 kop.crk_op = CRK_DSA_VERIFY;
1258
1259 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
1260 kop.crk_param[0].crp_p = (void *) dgst;
1261 kop.crk_param[0].crp_nbits = dlen * 8;
1262 if (bn2crparam(dsa->p, &kop.crk_param[1]))
1263 goto err;
1264 if (bn2crparam(dsa->q, &kop.crk_param[2]))
1265 goto err;
1266 if (bn2crparam(dsa->g, &kop.crk_param[3]))
1267 goto err;
1268 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
1269 goto err;
1270 if (bn2crparam(sig->r, &kop.crk_param[5]))
1271 goto err;
1272 if (bn2crparam(sig->s, &kop.crk_param[6]))
1273 goto err;
1274 kop.crk_iparams = 7;
1275
1276 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
1277 /*
1278 * OCF success value is 0, if not zero, change dsaret to fail
1279 */
1280 if (0 != kop.crk_status)
1281 dsaret = 0;
1282 } else {
1283 const DSA_METHOD *meth = DSA_OpenSSL();
1284
1285 dsaret = (meth->dsa_do_verify) (dgst, dlen, sig, dsa);
1286 }
1287 err:
1288 kop.crk_param[0].crp_p = NULL;
1289 zapparams(&kop);
1290 return (dsaret);
1291 }
1292
1293 static DSA_METHOD cryptodev_dsa = {
1294 "cryptodev DSA method",
1295 NULL,
1296 NULL, /* dsa_sign_setup */
1297 NULL,
1298 NULL, /* dsa_mod_exp */
1299 NULL,
1300 NULL, /* init */
1301 NULL, /* finish */
1302 0, /* flags */
1303 NULL /* app_data */
1304 };
1305
1306 static int
cryptodev_mod_exp_dh(const DH * dh,BIGNUM * r,const BIGNUM * a,const BIGNUM * p,const BIGNUM * m,BN_CTX * ctx,BN_MONT_CTX * m_ctx)1307 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
1308 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
1309 BN_MONT_CTX *m_ctx)
1310 {
1311 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1312 }
1313
1314 static int
cryptodev_dh_compute_key(unsigned char * key,const BIGNUM * pub_key,DH * dh)1315 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
1316 {
1317 struct crypt_kop kop;
1318 int dhret = 1;
1319 int fd, keylen;
1320
1321 if ((fd = get_dev_crypto()) < 0) {
1322 const DH_METHOD *meth = DH_OpenSSL();
1323
1324 return ((meth->compute_key) (key, pub_key, dh));
1325 }
1326
1327 keylen = BN_num_bits(dh->p);
1328
1329 memset(&kop, 0, sizeof kop);
1330 kop.crk_op = CRK_DH_COMPUTE_KEY;
1331
1332 /* inputs: dh->priv_key pub_key dh->p key */
1333 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
1334 goto err;
1335 if (bn2crparam(pub_key, &kop.crk_param[1]))
1336 goto err;
1337 if (bn2crparam(dh->p, &kop.crk_param[2]))
1338 goto err;
1339 kop.crk_iparams = 3;
1340
1341 kop.crk_param[3].crp_p = (void *) key;
1342 kop.crk_param[3].crp_nbits = keylen * 8;
1343 kop.crk_oparams = 1;
1344
1345 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1346 const DH_METHOD *meth = DH_OpenSSL();
1347
1348 dhret = (meth->compute_key) (key, pub_key, dh);
1349 }
1350 err:
1351 kop.crk_param[3].crp_p = NULL;
1352 zapparams(&kop);
1353 return (dhret);
1354 }
1355
1356 static DH_METHOD cryptodev_dh = {
1357 "cryptodev DH method",
1358 NULL, /* cryptodev_dh_generate_key */
1359 NULL,
1360 NULL,
1361 NULL,
1362 NULL,
1363 0, /* flags */
1364 NULL /* app_data */
1365 };
1366
1367 /*
1368 * ctrl right now is just a wrapper that doesn't do much
1369 * but I expect we'll want some options soon.
1370 */
1371 static int
cryptodev_ctrl(ENGINE * e,int cmd,long i,void * p,void (* f)(void))1372 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
1373 {
1374 # ifdef HAVE_SYSLOG_R
1375 struct syslog_data sd = SYSLOG_DATA_INIT;
1376 # endif
1377
1378 switch (cmd) {
1379 default:
1380 # ifdef HAVE_SYSLOG_R
1381 syslog_r(LOG_ERR, &sd, "cryptodev_ctrl: unknown command %d", cmd);
1382 # else
1383 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1384 # endif
1385 break;
1386 }
1387 return (1);
1388 }
1389
ENGINE_load_cryptodev(void)1390 void ENGINE_load_cryptodev(void)
1391 {
1392 ENGINE *engine = ENGINE_new();
1393 int fd;
1394
1395 if (engine == NULL)
1396 return;
1397 if ((fd = get_dev_crypto()) < 0) {
1398 ENGINE_free(engine);
1399 return;
1400 }
1401
1402 /*
1403 * find out what asymmetric crypto algorithms we support
1404 */
1405 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1406 put_dev_crypto(fd);
1407 ENGINE_free(engine);
1408 return;
1409 }
1410 put_dev_crypto(fd);
1411
1412 if (!ENGINE_set_id(engine, "cryptodev") ||
1413 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1414 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1415 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1416 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1417 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1418 ENGINE_free(engine);
1419 return;
1420 }
1421
1422 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1423 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1424
1425 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1426 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1427 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1428 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1429 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1430 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1431 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1432 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1433 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1434 cryptodev_rsa.rsa_mod_exp = cryptodev_rsa_mod_exp;
1435 else
1436 cryptodev_rsa.rsa_mod_exp = cryptodev_rsa_nocrt_mod_exp;
1437 }
1438 }
1439
1440 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1441 const DSA_METHOD *meth = DSA_OpenSSL();
1442
1443 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1444 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1445 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1446 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1447 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1448 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1449 }
1450 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1451 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1452 }
1453
1454 if (ENGINE_set_DH(engine, &cryptodev_dh)) {
1455 const DH_METHOD *dh_meth = DH_OpenSSL();
1456
1457 cryptodev_dh.generate_key = dh_meth->generate_key;
1458 cryptodev_dh.compute_key = dh_meth->compute_key;
1459 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1460 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1461 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1462 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1463 cryptodev_dh.compute_key = cryptodev_dh_compute_key;
1464 }
1465 }
1466
1467 ENGINE_add(engine);
1468 ENGINE_free(engine);
1469 ERR_clear_error();
1470 }
1471
1472 #endif /* HAVE_CRYPTODEV */
1473