1 /*
2 * Copyright (c) 2002 Bob Beck <beck@openbsd.org>
3 * Copyright (c) 2002 Theo de Raadt
4 * Copyright (c) 2002 Markus Friedl
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 */
28
29 #include <string.h>
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__))
37 # include <sys/param.h>
38 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
39 # define HAVE_CRYPTODEV
40 # endif
41 # if (OpenBSD >= 200110)
42 # define HAVE_SYSLOG_R
43 # endif
44 #endif
45
46 #ifndef HAVE_CRYPTODEV
47
ENGINE_load_cryptodev(void)48 void ENGINE_load_cryptodev(void)
49 {
50 /* This is a NOP on platforms without /dev/crypto */
51 return;
52 }
53
54 #else
55
56 # include <sys/types.h>
57 # include <crypto/cryptodev.h>
58 # include <openssl/dh.h>
59 # include <openssl/dsa.h>
60 # include <openssl/err.h>
61 # include <openssl/rsa.h>
62 # include <sys/ioctl.h>
63 # include <errno.h>
64 # include <stdio.h>
65 # include <unistd.h>
66 # include <fcntl.h>
67 # include <stdarg.h>
68 # include <syslog.h>
69 # include <errno.h>
70 # include <string.h>
71
72 struct dev_crypto_state {
73 struct session_op d_sess;
74 int d_fd;
75 # ifdef USE_CRYPTODEV_DIGESTS
76 char dummy_mac_key[HASH_MAX_LEN];
77 unsigned char digest_res[HASH_MAX_LEN];
78 char *mac_data;
79 int mac_len;
80 # endif
81 };
82
83 static u_int32_t cryptodev_asymfeat = 0;
84
85 static int get_asym_dev_crypto(void);
86 static int open_dev_crypto(void);
87 static int get_dev_crypto(void);
88 static int get_cryptodev_ciphers(const int **cnids);
89 # ifdef USE_CRYPTODEV_DIGESTS
90 static int get_cryptodev_digests(const int **cnids);
91 # endif
92 static int cryptodev_usable_ciphers(const int **nids);
93 static int cryptodev_usable_digests(const int **nids);
94 static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
95 const unsigned char *in, size_t inl);
96 static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
97 const unsigned char *iv, int enc);
98 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
99 static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
100 const int **nids, int nid);
101 static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
102 const int **nids, int nid);
103 static int bn2crparam(const BIGNUM *a, struct crparam *crp);
104 static int crparam2bn(struct crparam *crp, BIGNUM *a);
105 static void zapparams(struct crypt_kop *kop);
106 static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
107 int slen, BIGNUM *s);
108
109 static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
110 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
111 BN_MONT_CTX *m_ctx);
112 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
113 BN_CTX *ctx);
114 static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
115 BN_CTX *ctx);
116 static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
117 const BIGNUM *p, const BIGNUM *m,
118 BN_CTX *ctx, BN_MONT_CTX *m_ctx);
119 static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
120 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2,
121 BIGNUM *p, BN_CTX *ctx,
122 BN_MONT_CTX *mont);
123 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen,
124 DSA *dsa);
125 static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
126 DSA_SIG *sig, DSA *dsa);
127 static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
128 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
129 BN_MONT_CTX *m_ctx);
130 static int cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key,
131 DH *dh);
132 static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
133 void (*f) (void));
134 void ENGINE_load_cryptodev(void);
135
136 static const ENGINE_CMD_DEFN cryptodev_defns[] = {
137 {0, NULL, NULL, 0}
138 };
139
140 static struct {
141 int id;
142 int nid;
143 int ivmax;
144 int keylen;
145 } ciphers[] = {
146 {
147 CRYPTO_ARC4, NID_rc4, 0, 16,
148 },
149 {
150 CRYPTO_DES_CBC, NID_des_cbc, 8, 8,
151 },
152 {
153 CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24,
154 },
155 {
156 CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16,
157 },
158 {
159 CRYPTO_AES_CBC, NID_aes_192_cbc, 16, 24,
160 },
161 {
162 CRYPTO_AES_CBC, NID_aes_256_cbc, 16, 32,
163 },
164 # ifdef CRYPTO_AES_CTR
165 {
166 CRYPTO_AES_CTR, NID_aes_128_ctr, 14, 16,
167 },
168 {
169 CRYPTO_AES_CTR, NID_aes_192_ctr, 14, 24,
170 },
171 {
172 CRYPTO_AES_CTR, NID_aes_256_ctr, 14, 32,
173 },
174 # endif
175 {
176 CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16,
177 },
178 {
179 CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16,
180 },
181 {
182 CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0,
183 },
184 {
185 0, NID_undef, 0, 0,
186 },
187 };
188
189 # ifdef USE_CRYPTODEV_DIGESTS
190 static struct {
191 int id;
192 int nid;
193 int keylen;
194 } digests[] = {
195 {
196 CRYPTO_MD5_HMAC, NID_hmacWithMD5, 16
197 },
198 {
199 CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, 20
200 },
201 {
202 CRYPTO_RIPEMD160_HMAC, NID_ripemd160, 16
203 /* ? */
204 },
205 {
206 CRYPTO_MD5_KPDK, NID_undef, 0
207 },
208 {
209 CRYPTO_SHA1_KPDK, NID_undef, 0
210 },
211 {
212 CRYPTO_MD5, NID_md5, 16
213 },
214 {
215 CRYPTO_SHA1, NID_sha1, 20
216 },
217 {
218 0, NID_undef, 0
219 },
220 };
221 # endif
222
223 /*
224 * Return a fd if /dev/crypto seems usable, 0 otherwise.
225 */
open_dev_crypto(void)226 static int open_dev_crypto(void)
227 {
228 static int fd = -1;
229
230 if (fd == -1) {
231 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
232 return (-1);
233 /* close on exec */
234 if (fcntl(fd, F_SETFD, 1) == -1) {
235 close(fd);
236 fd = -1;
237 return (-1);
238 }
239 }
240 return (fd);
241 }
242
get_dev_crypto(void)243 static int get_dev_crypto(void)
244 {
245 int fd, retfd;
246
247 if ((fd = open_dev_crypto()) == -1)
248 return (-1);
249 # ifndef CRIOGET_NOT_NEEDED
250 if (ioctl(fd, CRIOGET, &retfd) == -1)
251 return (-1);
252
253 /* close on exec */
254 if (fcntl(retfd, F_SETFD, 1) == -1) {
255 close(retfd);
256 return (-1);
257 }
258 # else
259 retfd = fd;
260 # endif
261 return (retfd);
262 }
263
put_dev_crypto(int fd)264 static void put_dev_crypto(int fd)
265 {
266 # ifndef CRIOGET_NOT_NEEDED
267 close(fd);
268 # endif
269 }
270
271 /* Caching version for asym operations */
get_asym_dev_crypto(void)272 static int get_asym_dev_crypto(void)
273 {
274 static int fd = -1;
275
276 if (fd == -1)
277 fd = get_dev_crypto();
278 return fd;
279 }
280
281 /*
282 * Find out what ciphers /dev/crypto will let us have a session for.
283 * XXX note, that some of these openssl doesn't deal with yet!
284 * returning them here is harmless, as long as we return NULL
285 * when asked for a handler in the cryptodev_engine_ciphers routine
286 */
get_cryptodev_ciphers(const int ** cnids)287 static int get_cryptodev_ciphers(const int **cnids)
288 {
289 static int nids[CRYPTO_ALGORITHM_MAX];
290 struct session_op sess;
291 int fd, i, count = 0;
292
293 if ((fd = get_dev_crypto()) < 0) {
294 *cnids = NULL;
295 return (0);
296 }
297 memset(&sess, 0, sizeof(sess));
298 sess.key = (caddr_t) "123456789abcdefghijklmno";
299
300 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
301 if (ciphers[i].nid == NID_undef)
302 continue;
303 sess.cipher = ciphers[i].id;
304 sess.keylen = ciphers[i].keylen;
305 sess.mac = 0;
306 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
307 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
308 nids[count++] = ciphers[i].nid;
309 }
310 put_dev_crypto(fd);
311
312 if (count > 0)
313 *cnids = nids;
314 else
315 *cnids = NULL;
316 return (count);
317 }
318
319 # ifdef USE_CRYPTODEV_DIGESTS
320 /*
321 * Find out what digests /dev/crypto will let us have a session for.
322 * XXX note, that some of these openssl doesn't deal with yet!
323 * returning them here is harmless, as long as we return NULL
324 * when asked for a handler in the cryptodev_engine_digests routine
325 */
get_cryptodev_digests(const int ** cnids)326 static int get_cryptodev_digests(const int **cnids)
327 {
328 static int nids[CRYPTO_ALGORITHM_MAX];
329 struct session_op sess;
330 int fd, i, count = 0;
331
332 if ((fd = get_dev_crypto()) < 0) {
333 *cnids = NULL;
334 return (0);
335 }
336 memset(&sess, 0, sizeof(sess));
337 sess.mackey = (caddr_t) "123456789abcdefghijklmno";
338 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
339 if (digests[i].nid == NID_undef)
340 continue;
341 sess.mac = digests[i].id;
342 sess.mackeylen = digests[i].keylen;
343 sess.cipher = 0;
344 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
345 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
346 nids[count++] = digests[i].nid;
347 }
348 put_dev_crypto(fd);
349
350 if (count > 0)
351 *cnids = nids;
352 else
353 *cnids = NULL;
354 return (count);
355 }
356 # endif /* 0 */
357
358 /*
359 * Find the useable ciphers|digests from dev/crypto - this is the first
360 * thing called by the engine init crud which determines what it
361 * can use for ciphers from this engine. We want to return
362 * only what we can do, anythine else is handled by software.
363 *
364 * If we can't initialize the device to do anything useful for
365 * any reason, we want to return a NULL array, and 0 length,
366 * which forces everything to be done is software. By putting
367 * the initalization of the device in here, we ensure we can
368 * use this engine as the default, and if for whatever reason
369 * /dev/crypto won't do what we want it will just be done in
370 * software
371 *
372 * This can (should) be greatly expanded to perhaps take into
373 * account speed of the device, and what we want to do.
374 * (although the disabling of particular alg's could be controlled
375 * by the device driver with sysctl's.) - this is where we
376 * want most of the decisions made about what we actually want
377 * to use from /dev/crypto.
378 */
cryptodev_usable_ciphers(const int ** nids)379 static int cryptodev_usable_ciphers(const int **nids)
380 {
381 return (get_cryptodev_ciphers(nids));
382 }
383
cryptodev_usable_digests(const int ** nids)384 static int cryptodev_usable_digests(const int **nids)
385 {
386 # ifdef USE_CRYPTODEV_DIGESTS
387 return (get_cryptodev_digests(nids));
388 # else
389 /*
390 * XXXX just disable all digests for now, because it sucks.
391 * we need a better way to decide this - i.e. I may not
392 * want digests on slow cards like hifn on fast machines,
393 * but might want them on slow or loaded machines, etc.
394 * will also want them when using crypto cards that don't
395 * suck moose gonads - would be nice to be able to decide something
396 * as reasonable default without having hackery that's card dependent.
397 * of course, the default should probably be just do everything,
398 * with perhaps a sysctl to turn algoritms off (or have them off
399 * by default) on cards that generally suck like the hifn.
400 */
401 *nids = NULL;
402 return (0);
403 # endif
404 }
405
406 static int
cryptodev_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)407 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
408 const unsigned char *in, size_t inl)
409 {
410 struct crypt_op cryp;
411 struct dev_crypto_state *state = ctx->cipher_data;
412 struct session_op *sess = &state->d_sess;
413 const void *iiv;
414 unsigned char save_iv[EVP_MAX_IV_LENGTH];
415
416 if (state->d_fd < 0)
417 return (0);
418 if (!inl)
419 return (1);
420 if ((inl % ctx->cipher->block_size) != 0)
421 return (0);
422
423 memset(&cryp, 0, sizeof(cryp));
424
425 cryp.ses = sess->ses;
426 cryp.flags = 0;
427 cryp.len = inl;
428 cryp.src = (caddr_t) in;
429 cryp.dst = (caddr_t) out;
430 cryp.mac = 0;
431
432 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
433
434 if (ctx->cipher->iv_len) {
435 cryp.iv = (caddr_t) ctx->iv;
436 if (!ctx->encrypt) {
437 iiv = in + inl - ctx->cipher->iv_len;
438 memcpy(save_iv, iiv, ctx->cipher->iv_len);
439 }
440 } else
441 cryp.iv = NULL;
442
443 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
444 /*
445 * XXX need better errror handling this can fail for a number of
446 * different reasons.
447 */
448 return (0);
449 }
450
451 if (ctx->cipher->iv_len) {
452 if (ctx->encrypt)
453 iiv = out + inl - ctx->cipher->iv_len;
454 else
455 iiv = save_iv;
456 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
457 }
458 return (1);
459 }
460
461 static int
cryptodev_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)462 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
463 const unsigned char *iv, int enc)
464 {
465 struct dev_crypto_state *state = ctx->cipher_data;
466 struct session_op *sess = &state->d_sess;
467 int cipher = -1, i;
468
469 for (i = 0; ciphers[i].id; i++)
470 if (ctx->cipher->nid == ciphers[i].nid &&
471 ctx->cipher->iv_len <= ciphers[i].ivmax &&
472 ctx->key_len == ciphers[i].keylen) {
473 cipher = ciphers[i].id;
474 break;
475 }
476
477 if (!ciphers[i].id) {
478 state->d_fd = -1;
479 return (0);
480 }
481
482 memset(sess, 0, sizeof(struct session_op));
483
484 if ((state->d_fd = get_dev_crypto()) < 0)
485 return (0);
486
487 sess->key = (caddr_t) key;
488 sess->keylen = ctx->key_len;
489 sess->cipher = cipher;
490
491 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
492 put_dev_crypto(state->d_fd);
493 state->d_fd = -1;
494 return (0);
495 }
496 return (1);
497 }
498
499 /*
500 * free anything we allocated earlier when initting a
501 * session, and close the session.
502 */
cryptodev_cleanup(EVP_CIPHER_CTX * ctx)503 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
504 {
505 int ret = 0;
506 struct dev_crypto_state *state = ctx->cipher_data;
507 struct session_op *sess = &state->d_sess;
508
509 if (state->d_fd < 0)
510 return (0);
511
512 /*
513 * XXX if this ioctl fails, someting's wrong. the invoker may have called
514 * us with a bogus ctx, or we could have a device that for whatever
515 * reason just doesn't want to play ball - it's not clear what's right
516 * here - should this be an error? should it just increase a counter,
517 * hmm. For right now, we return 0 - I don't believe that to be "right".
518 * we could call the gorpy openssl lib error handlers that print messages
519 * to users of the library. hmm..
520 */
521
522 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
523 ret = 0;
524 } else {
525 ret = 1;
526 }
527 put_dev_crypto(state->d_fd);
528 state->d_fd = -1;
529
530 return (ret);
531 }
532
533 /*
534 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
535 * gets called when libcrypto requests a cipher NID.
536 */
537
538 /* RC4 */
539 const EVP_CIPHER cryptodev_rc4 = {
540 NID_rc4,
541 1, 16, 0,
542 EVP_CIPH_VARIABLE_LENGTH,
543 cryptodev_init_key,
544 cryptodev_cipher,
545 cryptodev_cleanup,
546 sizeof(struct dev_crypto_state),
547 NULL,
548 NULL,
549 NULL
550 };
551
552 /* DES CBC EVP */
553 const EVP_CIPHER cryptodev_des_cbc = {
554 NID_des_cbc,
555 8, 8, 8,
556 EVP_CIPH_CBC_MODE,
557 cryptodev_init_key,
558 cryptodev_cipher,
559 cryptodev_cleanup,
560 sizeof(struct dev_crypto_state),
561 EVP_CIPHER_set_asn1_iv,
562 EVP_CIPHER_get_asn1_iv,
563 NULL
564 };
565
566 /* 3DES CBC EVP */
567 const EVP_CIPHER cryptodev_3des_cbc = {
568 NID_des_ede3_cbc,
569 8, 24, 8,
570 EVP_CIPH_CBC_MODE,
571 cryptodev_init_key,
572 cryptodev_cipher,
573 cryptodev_cleanup,
574 sizeof(struct dev_crypto_state),
575 EVP_CIPHER_set_asn1_iv,
576 EVP_CIPHER_get_asn1_iv,
577 NULL
578 };
579
580 const EVP_CIPHER cryptodev_bf_cbc = {
581 NID_bf_cbc,
582 8, 16, 8,
583 EVP_CIPH_CBC_MODE,
584 cryptodev_init_key,
585 cryptodev_cipher,
586 cryptodev_cleanup,
587 sizeof(struct dev_crypto_state),
588 EVP_CIPHER_set_asn1_iv,
589 EVP_CIPHER_get_asn1_iv,
590 NULL
591 };
592
593 const EVP_CIPHER cryptodev_cast_cbc = {
594 NID_cast5_cbc,
595 8, 16, 8,
596 EVP_CIPH_CBC_MODE,
597 cryptodev_init_key,
598 cryptodev_cipher,
599 cryptodev_cleanup,
600 sizeof(struct dev_crypto_state),
601 EVP_CIPHER_set_asn1_iv,
602 EVP_CIPHER_get_asn1_iv,
603 NULL
604 };
605
606 const EVP_CIPHER cryptodev_aes_cbc = {
607 NID_aes_128_cbc,
608 16, 16, 16,
609 EVP_CIPH_CBC_MODE,
610 cryptodev_init_key,
611 cryptodev_cipher,
612 cryptodev_cleanup,
613 sizeof(struct dev_crypto_state),
614 EVP_CIPHER_set_asn1_iv,
615 EVP_CIPHER_get_asn1_iv,
616 NULL
617 };
618
619 const EVP_CIPHER cryptodev_aes_192_cbc = {
620 NID_aes_192_cbc,
621 16, 24, 16,
622 EVP_CIPH_CBC_MODE,
623 cryptodev_init_key,
624 cryptodev_cipher,
625 cryptodev_cleanup,
626 sizeof(struct dev_crypto_state),
627 EVP_CIPHER_set_asn1_iv,
628 EVP_CIPHER_get_asn1_iv,
629 NULL
630 };
631
632 const EVP_CIPHER cryptodev_aes_256_cbc = {
633 NID_aes_256_cbc,
634 16, 32, 16,
635 EVP_CIPH_CBC_MODE,
636 cryptodev_init_key,
637 cryptodev_cipher,
638 cryptodev_cleanup,
639 sizeof(struct dev_crypto_state),
640 EVP_CIPHER_set_asn1_iv,
641 EVP_CIPHER_get_asn1_iv,
642 NULL
643 };
644
645 # ifdef CRYPTO_AES_CTR
646 const EVP_CIPHER cryptodev_aes_ctr = {
647 NID_aes_128_ctr,
648 16, 16, 14,
649 EVP_CIPH_CTR_MODE,
650 cryptodev_init_key,
651 cryptodev_cipher,
652 cryptodev_cleanup,
653 sizeof(struct dev_crypto_state),
654 EVP_CIPHER_set_asn1_iv,
655 EVP_CIPHER_get_asn1_iv,
656 NULL
657 };
658
659 const EVP_CIPHER cryptodev_aes_ctr_192 = {
660 NID_aes_192_ctr,
661 16, 24, 14,
662 EVP_CIPH_CTR_MODE,
663 cryptodev_init_key,
664 cryptodev_cipher,
665 cryptodev_cleanup,
666 sizeof(struct dev_crypto_state),
667 EVP_CIPHER_set_asn1_iv,
668 EVP_CIPHER_get_asn1_iv,
669 NULL
670 };
671
672 const EVP_CIPHER cryptodev_aes_ctr_256 = {
673 NID_aes_256_ctr,
674 16, 32, 14,
675 EVP_CIPH_CTR_MODE,
676 cryptodev_init_key,
677 cryptodev_cipher,
678 cryptodev_cleanup,
679 sizeof(struct dev_crypto_state),
680 EVP_CIPHER_set_asn1_iv,
681 EVP_CIPHER_get_asn1_iv,
682 NULL
683 };
684 # endif
685 /*
686 * Registered by the ENGINE when used to find out how to deal with
687 * a particular NID in the ENGINE. this says what we'll do at the
688 * top level - note, that list is restricted by what we answer with
689 */
690 static int
cryptodev_engine_ciphers(ENGINE * e,const EVP_CIPHER ** cipher,const int ** nids,int nid)691 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
692 const int **nids, int nid)
693 {
694 if (!cipher)
695 return (cryptodev_usable_ciphers(nids));
696
697 switch (nid) {
698 case NID_rc4:
699 *cipher = &cryptodev_rc4;
700 break;
701 case NID_des_ede3_cbc:
702 *cipher = &cryptodev_3des_cbc;
703 break;
704 case NID_des_cbc:
705 *cipher = &cryptodev_des_cbc;
706 break;
707 case NID_bf_cbc:
708 *cipher = &cryptodev_bf_cbc;
709 break;
710 case NID_cast5_cbc:
711 *cipher = &cryptodev_cast_cbc;
712 break;
713 case NID_aes_128_cbc:
714 *cipher = &cryptodev_aes_cbc;
715 break;
716 case NID_aes_192_cbc:
717 *cipher = &cryptodev_aes_192_cbc;
718 break;
719 case NID_aes_256_cbc:
720 *cipher = &cryptodev_aes_256_cbc;
721 break;
722 # ifdef CRYPTO_AES_CTR
723 case NID_aes_128_ctr:
724 *cipher = &cryptodev_aes_ctr;
725 break;
726 case NID_aes_192_ctr:
727 *cipher = &cryptodev_aes_ctr_192;
728 break;
729 case NID_aes_256_ctr:
730 *cipher = &cryptodev_aes_ctr_256;
731 break;
732 # endif
733 default:
734 *cipher = NULL;
735 break;
736 }
737 return (*cipher != NULL);
738 }
739
740 # ifdef USE_CRYPTODEV_DIGESTS
741
742 /* convert digest type to cryptodev */
digest_nid_to_cryptodev(int nid)743 static int digest_nid_to_cryptodev(int nid)
744 {
745 int i;
746
747 for (i = 0; digests[i].id; i++)
748 if (digests[i].nid == nid)
749 return (digests[i].id);
750 return (0);
751 }
752
digest_key_length(int nid)753 static int digest_key_length(int nid)
754 {
755 int i;
756
757 for (i = 0; digests[i].id; i++)
758 if (digests[i].nid == nid)
759 return digests[i].keylen;
760 return (0);
761 }
762
cryptodev_digest_init(EVP_MD_CTX * ctx)763 static int cryptodev_digest_init(EVP_MD_CTX *ctx)
764 {
765 struct dev_crypto_state *state = ctx->md_data;
766 struct session_op *sess = &state->d_sess;
767 int digest;
768
769 if ((digest = digest_nid_to_cryptodev(ctx->digest->type)) == NID_undef) {
770 printf("cryptodev_digest_init: Can't get digest \n");
771 return (0);
772 }
773
774 memset(state, 0, sizeof(struct dev_crypto_state));
775
776 if ((state->d_fd = get_dev_crypto()) < 0) {
777 printf("cryptodev_digest_init: Can't get Dev \n");
778 return (0);
779 }
780
781 sess->mackey = state->dummy_mac_key;
782 sess->mackeylen = digest_key_length(ctx->digest->type);
783 sess->mac = digest;
784
785 if (ioctl(state->d_fd, CIOCGSESSION, sess) < 0) {
786 put_dev_crypto(state->d_fd);
787 state->d_fd = -1;
788 printf("cryptodev_digest_init: Open session failed\n");
789 return (0);
790 }
791
792 return (1);
793 }
794
cryptodev_digest_update(EVP_MD_CTX * ctx,const void * data,size_t count)795 static int cryptodev_digest_update(EVP_MD_CTX *ctx, const void *data,
796 size_t count)
797 {
798 struct crypt_op cryp;
799 struct dev_crypto_state *state = ctx->md_data;
800 struct session_op *sess = &state->d_sess;
801
802 if (!data || state->d_fd < 0) {
803 printf("cryptodev_digest_update: illegal inputs \n");
804 return (0);
805 }
806
807 if (!count) {
808 return (0);
809 }
810
811 if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) {
812 /* if application doesn't support one buffer */
813 char *mac_data =
814 OPENSSL_realloc(state->mac_data, state->mac_len + count);
815
816 if (mac_data == NULL) {
817 printf("cryptodev_digest_update: realloc failed\n");
818 return (0);
819 }
820
821 state->mac_data = mac_data;
822 memcpy(state->mac_data + state->mac_len, data, count);
823 state->mac_len += count;
824
825 return (1);
826 }
827
828 memset(&cryp, 0, sizeof(cryp));
829
830 cryp.ses = sess->ses;
831 cryp.flags = 0;
832 cryp.len = count;
833 cryp.src = (caddr_t) data;
834 cryp.dst = NULL;
835 cryp.mac = (caddr_t) state->digest_res;
836 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) {
837 printf("cryptodev_digest_update: digest failed\n");
838 return (0);
839 }
840 return (1);
841 }
842
cryptodev_digest_final(EVP_MD_CTX * ctx,unsigned char * md)843 static int cryptodev_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
844 {
845 struct crypt_op cryp;
846 struct dev_crypto_state *state = ctx->md_data;
847 struct session_op *sess = &state->d_sess;
848
849 int ret = 1;
850
851 if (!md || state->d_fd < 0) {
852 printf("cryptodev_digest_final: illegal input\n");
853 return (0);
854 }
855
856 if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) {
857 /* if application doesn't support one buffer */
858 memset(&cryp, 0, sizeof(cryp));
859 cryp.ses = sess->ses;
860 cryp.flags = 0;
861 cryp.len = state->mac_len;
862 cryp.src = state->mac_data;
863 cryp.dst = NULL;
864 cryp.mac = (caddr_t) md;
865 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) {
866 printf("cryptodev_digest_final: digest failed\n");
867 return (0);
868 }
869
870 return 1;
871 }
872
873 memcpy(md, state->digest_res, ctx->digest->md_size);
874
875 return (ret);
876 }
877
cryptodev_digest_cleanup(EVP_MD_CTX * ctx)878 static int cryptodev_digest_cleanup(EVP_MD_CTX *ctx)
879 {
880 int ret = 1;
881 struct dev_crypto_state *state = ctx->md_data;
882 struct session_op *sess = &state->d_sess;
883
884 if (state == NULL)
885 return 0;
886
887 if (state->d_fd < 0) {
888 printf("cryptodev_digest_cleanup: illegal input\n");
889 return (0);
890 }
891
892 if (state->mac_data) {
893 OPENSSL_free(state->mac_data);
894 state->mac_data = NULL;
895 state->mac_len = 0;
896 }
897
898 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) < 0) {
899 printf("cryptodev_digest_cleanup: failed to close session\n");
900 ret = 0;
901 } else {
902 ret = 1;
903 }
904 put_dev_crypto(state->d_fd);
905 state->d_fd = -1;
906
907 return (ret);
908 }
909
cryptodev_digest_copy(EVP_MD_CTX * to,const EVP_MD_CTX * from)910 static int cryptodev_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
911 {
912 struct dev_crypto_state *fstate = from->md_data;
913 struct dev_crypto_state *dstate = to->md_data;
914 struct session_op *sess;
915 int digest;
916
917 if (dstate == NULL || fstate == NULL)
918 return 1;
919
920 memcpy(dstate, fstate, sizeof(struct dev_crypto_state));
921
922 sess = &dstate->d_sess;
923
924 digest = digest_nid_to_cryptodev(to->digest->type);
925
926 sess->mackey = dstate->dummy_mac_key;
927 sess->mackeylen = digest_key_length(to->digest->type);
928 sess->mac = digest;
929
930 dstate->d_fd = get_dev_crypto();
931
932 if (ioctl(dstate->d_fd, CIOCGSESSION, sess) < 0) {
933 put_dev_crypto(dstate->d_fd);
934 dstate->d_fd = -1;
935 printf("cryptodev_digest_init: Open session failed\n");
936 return (0);
937 }
938
939 dstate->mac_len = fstate->mac_len;
940 if (fstate->mac_len != 0) {
941 if (fstate->mac_data != NULL) {
942 dstate->mac_data = OPENSSL_malloc(fstate->mac_len);
943 if (dstate->mac_data == NULL) {
944 printf("cryptodev_digest_init: malloc failed\n");
945 return 0;
946 }
947 memcpy(dstate->mac_data, fstate->mac_data, fstate->mac_len);
948 }
949 }
950
951 return 1;
952 }
953
954 const EVP_MD cryptodev_sha1 = {
955 NID_sha1,
956 NID_undef,
957 SHA_DIGEST_LENGTH,
958 EVP_MD_FLAG_ONESHOT,
959 cryptodev_digest_init,
960 cryptodev_digest_update,
961 cryptodev_digest_final,
962 cryptodev_digest_copy,
963 cryptodev_digest_cleanup,
964 EVP_PKEY_NULL_method,
965 SHA_CBLOCK,
966 sizeof(struct dev_crypto_state),
967 };
968
969 const EVP_MD cryptodev_md5 = {
970 NID_md5,
971 NID_undef,
972 16 /* MD5_DIGEST_LENGTH */ ,
973 EVP_MD_FLAG_ONESHOT,
974 cryptodev_digest_init,
975 cryptodev_digest_update,
976 cryptodev_digest_final,
977 cryptodev_digest_copy,
978 cryptodev_digest_cleanup,
979 EVP_PKEY_NULL_method,
980 64 /* MD5_CBLOCK */ ,
981 sizeof(struct dev_crypto_state),
982 };
983
984 # endif /* USE_CRYPTODEV_DIGESTS */
985
986 static int
cryptodev_engine_digests(ENGINE * e,const EVP_MD ** digest,const int ** nids,int nid)987 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
988 const int **nids, int nid)
989 {
990 if (!digest)
991 return (cryptodev_usable_digests(nids));
992
993 switch (nid) {
994 # ifdef USE_CRYPTODEV_DIGESTS
995 case NID_md5:
996 *digest = &cryptodev_md5;
997 break;
998 case NID_sha1:
999 *digest = &cryptodev_sha1;
1000 break;
1001 default:
1002 # endif /* USE_CRYPTODEV_DIGESTS */
1003 *digest = NULL;
1004 break;
1005 }
1006 return (*digest != NULL);
1007 }
1008
1009 /*
1010 * Convert a BIGNUM to the representation that /dev/crypto needs.
1011 * Upon completion of use, the caller is responsible for freeing
1012 * crp->crp_p.
1013 */
bn2crparam(const BIGNUM * a,struct crparam * crp)1014 static int bn2crparam(const BIGNUM *a, struct crparam *crp)
1015 {
1016 int i, j, k;
1017 ssize_t bytes, bits;
1018 u_char *b;
1019
1020 crp->crp_p = NULL;
1021 crp->crp_nbits = 0;
1022
1023 bits = BN_num_bits(a);
1024 bytes = (bits + 7) / 8;
1025
1026 b = malloc(bytes);
1027 if (b == NULL)
1028 return (1);
1029 memset(b, 0, bytes);
1030
1031 crp->crp_p = (caddr_t) b;
1032 crp->crp_nbits = bits;
1033
1034 for (i = 0, j = 0; i < a->top; i++) {
1035 for (k = 0; k < BN_BITS2 / 8; k++) {
1036 if ((j + k) >= bytes)
1037 return (0);
1038 b[j + k] = a->d[i] >> (k * 8);
1039 }
1040 j += BN_BITS2 / 8;
1041 }
1042 return (0);
1043 }
1044
1045 /* Convert a /dev/crypto parameter to a BIGNUM */
crparam2bn(struct crparam * crp,BIGNUM * a)1046 static int crparam2bn(struct crparam *crp, BIGNUM *a)
1047 {
1048 u_int8_t *pd;
1049 int i, bytes;
1050
1051 bytes = (crp->crp_nbits + 7) / 8;
1052
1053 if (bytes == 0)
1054 return (-1);
1055
1056 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
1057 return (-1);
1058
1059 for (i = 0; i < bytes; i++)
1060 pd[i] = ((char *)crp->crp_p)[bytes - i - 1];
1061
1062 BN_bin2bn(pd, bytes, a);
1063 free(pd);
1064
1065 return (0);
1066 }
1067
zapparams(struct crypt_kop * kop)1068 static void zapparams(struct crypt_kop *kop)
1069 {
1070 int i;
1071
1072 for (i = 0; i < kop->crk_iparams + kop->crk_oparams; i++) {
1073 OPENSSL_free(kop->crk_param[i].crp_p);
1074 kop->crk_param[i].crp_p = NULL;
1075 kop->crk_param[i].crp_nbits = 0;
1076 }
1077 }
1078
1079 static int
cryptodev_asym(struct crypt_kop * kop,int rlen,BIGNUM * r,int slen,BIGNUM * s)1080 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen,
1081 BIGNUM *s)
1082 {
1083 int fd, ret = -1;
1084
1085 if ((fd = get_asym_dev_crypto()) < 0)
1086 return ret;
1087
1088 if (r) {
1089 kop->crk_param[kop->crk_iparams].crp_p = OPENSSL_malloc(rlen);
1090 if (kop->crk_param[kop->crk_iparams].crp_p == NULL)
1091 return ret;
1092 memset(kop->crk_param[kop->crk_iparams].crp_p, 0, (size_t)rlen);
1093 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
1094 kop->crk_oparams++;
1095 }
1096 if (s) {
1097 kop->crk_param[kop->crk_iparams + 1].crp_p = OPENSSL_malloc(slen);
1098 /* No need to free the kop->crk_iparams parameter if it was allocated,
1099 * callers of this routine have to free allocated parameters through
1100 * zapparams both in case of success and failure
1101 */
1102 if (kop->crk_param[kop->crk_iparams+1].crp_p == NULL)
1103 return ret;
1104 memset(kop->crk_param[kop->crk_iparams + 1].crp_p, 0, (size_t)slen);
1105 kop->crk_param[kop->crk_iparams + 1].crp_nbits = slen * 8;
1106 kop->crk_oparams++;
1107 }
1108
1109 if (ioctl(fd, CIOCKEY, kop) == 0) {
1110 if (r)
1111 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
1112 if (s)
1113 crparam2bn(&kop->crk_param[kop->crk_iparams + 1], s);
1114 ret = 0;
1115 }
1116
1117 return ret;
1118 }
1119
1120 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)1121 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
1122 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
1123 {
1124 struct crypt_kop kop;
1125 int ret = 1;
1126
1127 /*
1128 * Currently, we know we can do mod exp iff we can do any asymmetric
1129 * operations at all.
1130 */
1131 if (cryptodev_asymfeat == 0) {
1132 ret = BN_mod_exp(r, a, p, m, ctx);
1133 return (ret);
1134 }
1135
1136 memset(&kop, 0, sizeof(kop));
1137 kop.crk_op = CRK_MOD_EXP;
1138
1139 /* inputs: a^p % m */
1140 if (bn2crparam(a, &kop.crk_param[0]))
1141 goto err;
1142 if (bn2crparam(p, &kop.crk_param[1]))
1143 goto err;
1144 if (bn2crparam(m, &kop.crk_param[2]))
1145 goto err;
1146 kop.crk_iparams = 3;
1147
1148 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL)) {
1149 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1150 printf("OCF asym process failed, Running in software\n");
1151 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
1152
1153 } else if (ECANCELED == kop.crk_status) {
1154 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1155 printf("OCF hardware operation cancelled. Running in Software\n");
1156 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
1157 }
1158 /* else cryptodev operation worked ok ==> ret = 1 */
1159
1160 err:
1161 zapparams(&kop);
1162 return (ret);
1163 }
1164
1165 static int
cryptodev_rsa_nocrt_mod_exp(BIGNUM * r0,const BIGNUM * I,RSA * rsa,BN_CTX * ctx)1166 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
1167 BN_CTX *ctx)
1168 {
1169 int r;
1170 ctx = BN_CTX_new();
1171 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
1172 BN_CTX_free(ctx);
1173 return (r);
1174 }
1175
1176 static int
cryptodev_rsa_mod_exp(BIGNUM * r0,const BIGNUM * I,RSA * rsa,BN_CTX * ctx)1177 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
1178 {
1179 struct crypt_kop kop;
1180 int ret = 1;
1181
1182 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
1183 /* XXX 0 means failure?? */
1184 return (0);
1185 }
1186
1187 memset(&kop, 0, sizeof(kop));
1188 kop.crk_op = CRK_MOD_EXP_CRT;
1189 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
1190 if (bn2crparam(rsa->p, &kop.crk_param[0]))
1191 goto err;
1192 if (bn2crparam(rsa->q, &kop.crk_param[1]))
1193 goto err;
1194 if (bn2crparam(I, &kop.crk_param[2]))
1195 goto err;
1196 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
1197 goto err;
1198 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
1199 goto err;
1200 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
1201 goto err;
1202 kop.crk_iparams = 6;
1203
1204 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL)) {
1205 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1206 printf("OCF asym process failed, running in Software\n");
1207 ret = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
1208
1209 } else if (ECANCELED == kop.crk_status) {
1210 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1211 printf("OCF hardware operation cancelled. Running in Software\n");
1212 ret = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
1213 }
1214 /* else cryptodev operation worked ok ==> ret = 1 */
1215
1216 err:
1217 zapparams(&kop);
1218 return (ret);
1219 }
1220
1221 static RSA_METHOD cryptodev_rsa = {
1222 "cryptodev RSA method",
1223 NULL, /* rsa_pub_enc */
1224 NULL, /* rsa_pub_dec */
1225 NULL, /* rsa_priv_enc */
1226 NULL, /* rsa_priv_dec */
1227 NULL,
1228 NULL,
1229 NULL, /* init */
1230 NULL, /* finish */
1231 0, /* flags */
1232 NULL, /* app_data */
1233 NULL, /* rsa_sign */
1234 NULL /* rsa_verify */
1235 };
1236
1237 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)1238 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
1239 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
1240 {
1241 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1242 }
1243
1244 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)1245 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
1246 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
1247 BN_CTX *ctx, BN_MONT_CTX *mont)
1248 {
1249 BIGNUM t2;
1250 int ret = 0;
1251
1252 BN_init(&t2);
1253
1254 /* v = ( g^u1 * y^u2 mod p ) mod q */
1255 /* let t1 = g ^ u1 mod p */
1256 ret = 0;
1257
1258 if (!dsa->meth->bn_mod_exp(dsa, t1, dsa->g, u1, dsa->p, ctx, mont))
1259 goto err;
1260
1261 /* let t2 = y ^ u2 mod p */
1262 if (!dsa->meth->bn_mod_exp(dsa, &t2, dsa->pub_key, u2, dsa->p, ctx, mont))
1263 goto err;
1264 /* let u1 = t1 * t2 mod p */
1265 if (!BN_mod_mul(u1, t1, &t2, dsa->p, ctx))
1266 goto err;
1267
1268 BN_copy(t1, u1);
1269
1270 ret = 1;
1271 err:
1272 BN_free(&t2);
1273 return (ret);
1274 }
1275
cryptodev_dsa_do_sign(const unsigned char * dgst,int dlen,DSA * dsa)1276 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen,
1277 DSA *dsa)
1278 {
1279 struct crypt_kop kop;
1280 BIGNUM *r = NULL, *s = NULL;
1281 DSA_SIG *dsaret = NULL;
1282
1283 if ((r = BN_new()) == NULL)
1284 goto err;
1285 if ((s = BN_new()) == NULL) {
1286 BN_free(r);
1287 goto err;
1288 }
1289
1290 memset(&kop, 0, sizeof(kop));
1291 kop.crk_op = CRK_DSA_SIGN;
1292
1293 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
1294 kop.crk_param[0].crp_p = (caddr_t) dgst;
1295 kop.crk_param[0].crp_nbits = dlen * 8;
1296 if (bn2crparam(dsa->p, &kop.crk_param[1]))
1297 goto err;
1298 if (bn2crparam(dsa->q, &kop.crk_param[2]))
1299 goto err;
1300 if (bn2crparam(dsa->g, &kop.crk_param[3]))
1301 goto err;
1302 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
1303 goto err;
1304 kop.crk_iparams = 5;
1305
1306 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
1307 BN_num_bytes(dsa->q), s) == 0) {
1308 dsaret = DSA_SIG_new();
1309 if (dsaret == NULL)
1310 goto err;
1311 dsaret->r = r;
1312 dsaret->s = s;
1313 r = s = NULL;
1314 } else {
1315 const DSA_METHOD *meth = DSA_OpenSSL();
1316 dsaret = (meth->dsa_do_sign) (dgst, dlen, dsa);
1317 }
1318 err:
1319 BN_free(r);
1320 BN_free(s);
1321 kop.crk_param[0].crp_p = NULL;
1322 zapparams(&kop);
1323 return (dsaret);
1324 }
1325
1326 static int
cryptodev_dsa_verify(const unsigned char * dgst,int dlen,DSA_SIG * sig,DSA * dsa)1327 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
1328 DSA_SIG *sig, DSA *dsa)
1329 {
1330 struct crypt_kop kop;
1331 int dsaret = 1;
1332
1333 memset(&kop, 0, sizeof(kop));
1334 kop.crk_op = CRK_DSA_VERIFY;
1335
1336 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
1337 kop.crk_param[0].crp_p = (caddr_t) dgst;
1338 kop.crk_param[0].crp_nbits = dlen * 8;
1339 if (bn2crparam(dsa->p, &kop.crk_param[1]))
1340 goto err;
1341 if (bn2crparam(dsa->q, &kop.crk_param[2]))
1342 goto err;
1343 if (bn2crparam(dsa->g, &kop.crk_param[3]))
1344 goto err;
1345 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
1346 goto err;
1347 if (bn2crparam(sig->r, &kop.crk_param[5]))
1348 goto err;
1349 if (bn2crparam(sig->s, &kop.crk_param[6]))
1350 goto err;
1351 kop.crk_iparams = 7;
1352
1353 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
1354 /*
1355 * OCF success value is 0, if not zero, change dsaret to fail
1356 */
1357 if (0 != kop.crk_status)
1358 dsaret = 0;
1359 } else {
1360 const DSA_METHOD *meth = DSA_OpenSSL();
1361
1362 dsaret = (meth->dsa_do_verify) (dgst, dlen, sig, dsa);
1363 }
1364 err:
1365 kop.crk_param[0].crp_p = NULL;
1366 zapparams(&kop);
1367 return (dsaret);
1368 }
1369
1370 static DSA_METHOD cryptodev_dsa = {
1371 "cryptodev DSA method",
1372 NULL,
1373 NULL, /* dsa_sign_setup */
1374 NULL,
1375 NULL, /* dsa_mod_exp */
1376 NULL,
1377 NULL, /* init */
1378 NULL, /* finish */
1379 0, /* flags */
1380 NULL /* app_data */
1381 };
1382
1383 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)1384 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
1385 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
1386 BN_MONT_CTX *m_ctx)
1387 {
1388 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1389 }
1390
1391 static int
cryptodev_dh_compute_key(unsigned char * key,const BIGNUM * pub_key,DH * dh)1392 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
1393 {
1394 struct crypt_kop kop;
1395 int dhret = 1;
1396 int fd, keylen;
1397
1398 if ((fd = get_asym_dev_crypto()) < 0) {
1399 const DH_METHOD *meth = DH_OpenSSL();
1400
1401 return ((meth->compute_key) (key, pub_key, dh));
1402 }
1403
1404 keylen = BN_num_bits(dh->p);
1405
1406 memset(&kop, 0, sizeof(kop));
1407 kop.crk_op = CRK_DH_COMPUTE_KEY;
1408
1409 /* inputs: dh->priv_key pub_key dh->p key */
1410 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
1411 goto err;
1412 if (bn2crparam(pub_key, &kop.crk_param[1]))
1413 goto err;
1414 if (bn2crparam(dh->p, &kop.crk_param[2]))
1415 goto err;
1416 kop.crk_iparams = 3;
1417
1418 kop.crk_param[3].crp_p = (caddr_t) key;
1419 kop.crk_param[3].crp_nbits = keylen * 8;
1420 kop.crk_oparams = 1;
1421
1422 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1423 const DH_METHOD *meth = DH_OpenSSL();
1424
1425 dhret = (meth->compute_key) (key, pub_key, dh);
1426 }
1427 err:
1428 kop.crk_param[3].crp_p = NULL;
1429 zapparams(&kop);
1430 return (dhret);
1431 }
1432
1433 static DH_METHOD cryptodev_dh = {
1434 "cryptodev DH method",
1435 NULL, /* cryptodev_dh_generate_key */
1436 NULL,
1437 NULL,
1438 NULL,
1439 NULL,
1440 0, /* flags */
1441 NULL /* app_data */
1442 };
1443
1444 /*
1445 * ctrl right now is just a wrapper that doesn't do much
1446 * but I expect we'll want some options soon.
1447 */
1448 static int
cryptodev_ctrl(ENGINE * e,int cmd,long i,void * p,void (* f)(void))1449 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
1450 {
1451 # ifdef HAVE_SYSLOG_R
1452 struct syslog_data sd = SYSLOG_DATA_INIT;
1453 # endif
1454
1455 switch (cmd) {
1456 default:
1457 # ifdef HAVE_SYSLOG_R
1458 syslog_r(LOG_ERR, &sd, "cryptodev_ctrl: unknown command %d", cmd);
1459 # else
1460 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1461 # endif
1462 break;
1463 }
1464 return (1);
1465 }
1466
ENGINE_load_cryptodev(void)1467 void ENGINE_load_cryptodev(void)
1468 {
1469 ENGINE *engine = ENGINE_new();
1470 int fd;
1471
1472 if (engine == NULL)
1473 return;
1474 if ((fd = get_dev_crypto()) < 0) {
1475 ENGINE_free(engine);
1476 return;
1477 }
1478
1479 /*
1480 * find out what asymmetric crypto algorithms we support
1481 */
1482 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1483 put_dev_crypto(fd);
1484 ENGINE_free(engine);
1485 return;
1486 }
1487 put_dev_crypto(fd);
1488
1489 if (!ENGINE_set_id(engine, "cryptodev") ||
1490 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1491 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1492 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1493 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1494 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1495 ENGINE_free(engine);
1496 return;
1497 }
1498
1499 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1500 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1501
1502 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1503 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1504 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1505 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1506 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1507 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1508 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1509 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1510 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1511 cryptodev_rsa.rsa_mod_exp = cryptodev_rsa_mod_exp;
1512 else
1513 cryptodev_rsa.rsa_mod_exp = cryptodev_rsa_nocrt_mod_exp;
1514 }
1515 }
1516
1517 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1518 const DSA_METHOD *meth = DSA_OpenSSL();
1519
1520 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1521 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1522 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1523 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1524 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1525 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1526 }
1527 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1528 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1529 }
1530
1531 if (ENGINE_set_DH(engine, &cryptodev_dh)) {
1532 const DH_METHOD *dh_meth = DH_OpenSSL();
1533
1534 cryptodev_dh.generate_key = dh_meth->generate_key;
1535 cryptodev_dh.compute_key = dh_meth->compute_key;
1536 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1537 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1538 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1539 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1540 cryptodev_dh.compute_key = cryptodev_dh_compute_key;
1541 }
1542 }
1543
1544 ENGINE_add(engine);
1545 ENGINE_free(engine);
1546 ERR_clear_error();
1547 }
1548
1549 #endif /* HAVE_CRYPTODEV */
1550