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-rw-r--r--src/lib/libcrypto/engine/hw_cryptodev.c1135
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diff --git a/src/lib/libcrypto/engine/hw_cryptodev.c b/src/lib/libcrypto/engine/hw_cryptodev.c
deleted file mode 100644
index 3e7fff1c1e..0000000000
--- a/src/lib/libcrypto/engine/hw_cryptodev.c
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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 <openssl/objects.h>
30#include <openssl/engine.h>
31#include <openssl/evp.h>
32
33#if (defined(__unix__) || defined(unix)) && !defined(USG)
34#include <sys/param.h>
35# if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
36# define HAVE_CRYPTODEV
37# endif
38# if (OpenBSD >= 200110)
39# define HAVE_SYSLOG_R
40# endif
41#endif
42
43#ifndef HAVE_CRYPTODEV
44
45void
46ENGINE_load_cryptodev(void)
47{
48 /* This is a NOP on platforms without /dev/crypto */
49 return;
50}
51
52#else
53
54#include <sys/types.h>
55#include <crypto/cryptodev.h>
56#include <sys/ioctl.h>
57#include <errno.h>
58#include <stdio.h>
59#include <unistd.h>
60#include <fcntl.h>
61#include <stdarg.h>
62#include <syslog.h>
63#include <errno.h>
64#include <string.h>
65
66struct dev_crypto_state {
67 struct session_op d_sess;
68 int d_fd;
69};
70
71static u_int32_t cryptodev_asymfeat = 0;
72
73static int get_asym_dev_crypto(void);
74static int open_dev_crypto(void);
75static int get_dev_crypto(void);
76static int cryptodev_max_iv(int cipher);
77static int cryptodev_key_length_valid(int cipher, int len);
78static int cipher_nid_to_cryptodev(int nid);
79static int get_cryptodev_ciphers(const int **cnids);
80/*static int get_cryptodev_digests(const int **cnids);*/
81static int cryptodev_usable_ciphers(const int **nids);
82static int cryptodev_usable_digests(const int **nids);
83static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
84 const unsigned char *in, unsigned int inl);
85static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
86 const unsigned char *iv, int enc);
87static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
88static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
89 const int **nids, int nid);
90static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
91 const int **nids, int nid);
92static int bn2crparam(const BIGNUM *a, struct crparam *crp);
93static int crparam2bn(struct crparam *crp, BIGNUM *a);
94static void zapparams(struct crypt_kop *kop);
95static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
96 int slen, BIGNUM *s);
97
98static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
99 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
100static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I,
101 RSA *rsa);
102static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
103static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
104 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
105static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
106 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
107 BN_CTX *ctx, BN_MONT_CTX *mont);
108static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst,
109 int dlen, DSA *dsa);
110static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
111 DSA_SIG *sig, DSA *dsa);
112static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
113 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
114 BN_MONT_CTX *m_ctx);
115static int cryptodev_dh_compute_key(unsigned char *key,
116 const BIGNUM *pub_key, DH *dh);
117static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
118 void (*f)());
119void ENGINE_load_cryptodev(void);
120
121static const ENGINE_CMD_DEFN cryptodev_defns[] = {
122 { 0, NULL, NULL, 0 }
123};
124
125static struct {
126 int id;
127 int nid;
128 int ivmax;
129 int keylen;
130} ciphers[] = {
131 { CRYPTO_DES_CBC, NID_des_cbc, 8, 8, },
132 { CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24, },
133 { CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16, },
134 { CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16, },
135 { CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16, },
136 { CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0, },
137 { 0, NID_undef, 0, 0, },
138};
139
140#if 0 /* UNUSED */
141static struct {
142 int id;
143 int nid;
144} digests[] = {
145 { CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, },
146 { CRYPTO_RIPEMD160_HMAC, NID_ripemd160, },
147 { CRYPTO_MD5_KPDK, NID_undef, },
148 { CRYPTO_SHA1_KPDK, NID_undef, },
149 { CRYPTO_MD5, NID_md5, },
150 { CRYPTO_SHA1, NID_undef, },
151 { 0, NID_undef, },
152};
153#endif
154
155/*
156 * Return a fd if /dev/crypto seems usable, 0 otherwise.
157 */
158static int
159open_dev_crypto(void)
160{
161 static int fd = -1;
162
163 if (fd == -1) {
164 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
165 return (-1);
166 /* close on exec */
167 if (fcntl(fd, F_SETFD, 1) == -1) {
168 close(fd);
169 fd = -1;
170 return (-1);
171 }
172 }
173 return (fd);
174}
175
176static int
177get_dev_crypto(void)
178{
179 int fd, retfd;
180
181 if ((fd = open_dev_crypto()) == -1)
182 return (-1);
183 if (ioctl(fd, CRIOGET, &retfd) == -1)
184 return (-1);
185
186 /* close on exec */
187 if (fcntl(retfd, F_SETFD, 1) == -1) {
188 close(retfd);
189 return (-1);
190 }
191 return (retfd);
192}
193
194/* Caching version for asym operations */
195static int
196get_asym_dev_crypto(void)
197{
198 static int fd = -1;
199
200 if (fd == -1)
201 fd = get_dev_crypto();
202 return fd;
203}
204
205/*
206 * XXXX this needs to be set for each alg - and determined from
207 * a running card.
208 */
209static int
210cryptodev_max_iv(int cipher)
211{
212 int i;
213
214 for (i = 0; ciphers[i].id; i++)
215 if (ciphers[i].id == cipher)
216 return (ciphers[i].ivmax);
217 return (0);
218}
219
220/*
221 * XXXX this needs to be set for each alg - and determined from
222 * a running card. For now, fake it out - but most of these
223 * for real devices should return 1 for the supported key
224 * sizes the device can handle.
225 */
226static int
227cryptodev_key_length_valid(int cipher, int len)
228{
229 int i;
230
231 for (i = 0; ciphers[i].id; i++)
232 if (ciphers[i].id == cipher)
233 return (ciphers[i].keylen == len);
234 return (0);
235}
236
237/* convert libcrypto nids to cryptodev */
238static int
239cipher_nid_to_cryptodev(int nid)
240{
241 int i;
242
243 for (i = 0; ciphers[i].id; i++)
244 if (ciphers[i].nid == nid)
245 return (ciphers[i].id);
246 return (0);
247}
248
249/*
250 * Find out what ciphers /dev/crypto will let us have a session for.
251 * XXX note, that some of these openssl doesn't deal with yet!
252 * returning them here is harmless, as long as we return NULL
253 * when asked for a handler in the cryptodev_engine_ciphers routine
254 */
255static int
256get_cryptodev_ciphers(const int **cnids)
257{
258 static int nids[CRYPTO_ALGORITHM_MAX];
259 struct session_op sess;
260 int fd, i, count = 0;
261
262 if ((fd = get_dev_crypto()) < 0) {
263 *cnids = NULL;
264 return (0);
265 }
266 memset(&sess, 0, sizeof(sess));
267 sess.key = (caddr_t)"123456781234567812345678";
268
269 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
270 if (ciphers[i].nid == NID_undef)
271 continue;
272 sess.cipher = ciphers[i].id;
273 sess.keylen = ciphers[i].keylen;
274 sess.mac = 0;
275 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
276 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
277 nids[count++] = ciphers[i].nid;
278 }
279 close(fd);
280
281 if (count > 0)
282 *cnids = nids;
283 else
284 *cnids = NULL;
285 return (count);
286}
287
288/*
289 * Find out what digests /dev/crypto will let us have a session for.
290 * XXX note, that some of these openssl doesn't deal with yet!
291 * returning them here is harmless, as long as we return NULL
292 * when asked for a handler in the cryptodev_engine_digests routine
293 */
294#if 0 /* UNUSED */
295static int
296get_cryptodev_digests(const int **cnids)
297{
298 static int nids[CRYPTO_ALGORITHM_MAX];
299 struct session_op sess;
300 int fd, i, count = 0;
301
302 if ((fd = get_dev_crypto()) < 0) {
303 *cnids = NULL;
304 return (0);
305 }
306 memset(&sess, 0, sizeof(sess));
307 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
308 if (digests[i].nid == NID_undef)
309 continue;
310 sess.mac = digests[i].id;
311 sess.cipher = 0;
312 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
313 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
314 nids[count++] = digests[i].nid;
315 }
316 close(fd);
317
318 if (count > 0)
319 *cnids = nids;
320 else
321 *cnids = NULL;
322 return (count);
323}
324#endif
325
326/*
327 * Find the useable ciphers|digests from dev/crypto - this is the first
328 * thing called by the engine init crud which determines what it
329 * can use for ciphers from this engine. We want to return
330 * only what we can do, anythine else is handled by software.
331 *
332 * If we can't initialize the device to do anything useful for
333 * any reason, we want to return a NULL array, and 0 length,
334 * which forces everything to be done is software. By putting
335 * the initalization of the device in here, we ensure we can
336 * use this engine as the default, and if for whatever reason
337 * /dev/crypto won't do what we want it will just be done in
338 * software
339 *
340 * This can (should) be greatly expanded to perhaps take into
341 * account speed of the device, and what we want to do.
342 * (although the disabling of particular alg's could be controlled
343 * by the device driver with sysctl's.) - this is where we
344 * want most of the decisions made about what we actually want
345 * to use from /dev/crypto.
346 */
347static int
348cryptodev_usable_ciphers(const int **nids)
349{
350 return (get_cryptodev_ciphers(nids));
351}
352
353static int
354cryptodev_usable_digests(const int **nids)
355{
356 /*
357 * XXXX just disable all digests for now, because it sucks.
358 * we need a better way to decide this - i.e. I may not
359 * want digests on slow cards like hifn on fast machines,
360 * but might want them on slow or loaded machines, etc.
361 * will also want them when using crypto cards that don't
362 * suck moose gonads - would be nice to be able to decide something
363 * as reasonable default without having hackery that's card dependent.
364 * of course, the default should probably be just do everything,
365 * with perhaps a sysctl to turn algoritms off (or have them off
366 * by default) on cards that generally suck like the hifn.
367 */
368 *nids = NULL;
369 return (0);
370}
371
372static int
373cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
374 const unsigned char *in, unsigned int inl)
375{
376 struct crypt_op cryp;
377 struct dev_crypto_state *state = ctx->cipher_data;
378 struct session_op *sess = &state->d_sess;
379 void *iiv;
380 unsigned char save_iv[EVP_MAX_IV_LENGTH];
381
382 if (state->d_fd < 0)
383 return (0);
384 if (!inl)
385 return (1);
386 if ((inl % ctx->cipher->block_size) != 0)
387 return (0);
388
389 memset(&cryp, 0, sizeof(cryp));
390
391 cryp.ses = sess->ses;
392 cryp.flags = 0;
393 cryp.len = inl;
394 cryp.src = (caddr_t) in;
395 cryp.dst = (caddr_t) out;
396 cryp.mac = 0;
397
398 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
399
400 if (ctx->cipher->iv_len) {
401 cryp.iv = (caddr_t) ctx->iv;
402 if (!ctx->encrypt) {
403 iiv = (void *) in + inl - ctx->cipher->iv_len;
404 memcpy(save_iv, iiv, ctx->cipher->iv_len);
405 }
406 } else
407 cryp.iv = NULL;
408
409 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
410 /* XXX need better errror handling
411 * this can fail for a number of different reasons.
412 */
413 return (0);
414 }
415
416 if (ctx->cipher->iv_len) {
417 if (ctx->encrypt)
418 iiv = (void *) out + inl - ctx->cipher->iv_len;
419 else
420 iiv = save_iv;
421 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
422 }
423 return (1);
424}
425
426static int
427cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
428 const unsigned char *iv, int enc)
429{
430 struct dev_crypto_state *state = ctx->cipher_data;
431 struct session_op *sess = &state->d_sess;
432 int cipher;
433
434 if ((cipher = cipher_nid_to_cryptodev(ctx->cipher->nid)) == NID_undef)
435 return (0);
436
437 if (ctx->cipher->iv_len > cryptodev_max_iv(cipher))
438 return (0);
439
440 if (!cryptodev_key_length_valid(cipher, ctx->key_len))
441 return (0);
442
443 memset(sess, 0, sizeof(struct session_op));
444
445 if ((state->d_fd = get_dev_crypto()) < 0)
446 return (0);
447
448 sess->key = (unsigned char *)key;
449 sess->keylen = ctx->key_len;
450 sess->cipher = cipher;
451
452 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
453 close(state->d_fd);
454 state->d_fd = -1;
455 return (0);
456 }
457 return (1);
458}
459
460/*
461 * free anything we allocated earlier when initting a
462 * session, and close the session.
463 */
464static int
465cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
466{
467 int ret = 0;
468 struct dev_crypto_state *state = ctx->cipher_data;
469 struct session_op *sess = &state->d_sess;
470
471 if (state->d_fd < 0)
472 return (0);
473
474 /* XXX if this ioctl fails, someting's wrong. the invoker
475 * may have called us with a bogus ctx, or we could
476 * have a device that for whatever reason just doesn't
477 * want to play ball - it's not clear what's right
478 * here - should this be an error? should it just
479 * increase a counter, hmm. For right now, we return
480 * 0 - I don't believe that to be "right". we could
481 * call the gorpy openssl lib error handlers that
482 * print messages to users of the library. hmm..
483 */
484
485 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
486 ret = 0;
487 } else {
488 ret = 1;
489 }
490 close(state->d_fd);
491 state->d_fd = -1;
492
493 return (ret);
494}
495
496/*
497 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
498 * gets called when libcrypto requests a cipher NID.
499 */
500
501/* DES CBC EVP */
502const EVP_CIPHER cryptodev_des_cbc = {
503 NID_des_cbc,
504 8, 8, 8,
505 EVP_CIPH_CBC_MODE,
506 cryptodev_init_key,
507 cryptodev_cipher,
508 cryptodev_cleanup,
509 sizeof(struct dev_crypto_state),
510 EVP_CIPHER_set_asn1_iv,
511 EVP_CIPHER_get_asn1_iv,
512 NULL
513};
514
515/* 3DES CBC EVP */
516const EVP_CIPHER cryptodev_3des_cbc = {
517 NID_des_ede3_cbc,
518 8, 24, 8,
519 EVP_CIPH_CBC_MODE,
520 cryptodev_init_key,
521 cryptodev_cipher,
522 cryptodev_cleanup,
523 sizeof(struct dev_crypto_state),
524 EVP_CIPHER_set_asn1_iv,
525 EVP_CIPHER_get_asn1_iv,
526 NULL
527};
528
529const EVP_CIPHER cryptodev_bf_cbc = {
530 NID_bf_cbc,
531 8, 16, 8,
532 EVP_CIPH_CBC_MODE,
533 cryptodev_init_key,
534 cryptodev_cipher,
535 cryptodev_cleanup,
536 sizeof(struct dev_crypto_state),
537 EVP_CIPHER_set_asn1_iv,
538 EVP_CIPHER_get_asn1_iv,
539 NULL
540};
541
542const EVP_CIPHER cryptodev_cast_cbc = {
543 NID_cast5_cbc,
544 8, 16, 8,
545 EVP_CIPH_CBC_MODE,
546 cryptodev_init_key,
547 cryptodev_cipher,
548 cryptodev_cleanup,
549 sizeof(struct dev_crypto_state),
550 EVP_CIPHER_set_asn1_iv,
551 EVP_CIPHER_get_asn1_iv,
552 NULL
553};
554
555const EVP_CIPHER cryptodev_aes_cbc = {
556 NID_aes_128_cbc,
557 16, 16, 16,
558 EVP_CIPH_CBC_MODE,
559 cryptodev_init_key,
560 cryptodev_cipher,
561 cryptodev_cleanup,
562 sizeof(struct dev_crypto_state),
563 EVP_CIPHER_set_asn1_iv,
564 EVP_CIPHER_get_asn1_iv,
565 NULL
566};
567
568/*
569 * Registered by the ENGINE when used to find out how to deal with
570 * a particular NID in the ENGINE. this says what we'll do at the
571 * top level - note, that list is restricted by what we answer with
572 */
573static int
574cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
575 const int **nids, int nid)
576{
577 if (!cipher)
578 return (cryptodev_usable_ciphers(nids));
579
580 switch (nid) {
581 case NID_des_ede3_cbc:
582 *cipher = &cryptodev_3des_cbc;
583 break;
584 case NID_des_cbc:
585 *cipher = &cryptodev_des_cbc;
586 break;
587 case NID_bf_cbc:
588 *cipher = &cryptodev_bf_cbc;
589 break;
590 case NID_cast5_cbc:
591 *cipher = &cryptodev_cast_cbc;
592 break;
593 case NID_aes_128_cbc:
594 *cipher = &cryptodev_aes_cbc;
595 break;
596 default:
597 *cipher = NULL;
598 break;
599 }
600 return (*cipher != NULL);
601}
602
603static int
604cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
605 const int **nids, int nid)
606{
607 if (!digest)
608 return (cryptodev_usable_digests(nids));
609
610 switch (nid) {
611 case NID_md5:
612 *digest = NULL; /* need to make a clean md5 critter */
613 break;
614 default:
615 *digest = NULL;
616 break;
617 }
618 return (*digest != NULL);
619}
620
621/*
622 * Convert a BIGNUM to the representation that /dev/crypto needs.
623 * Upon completion of use, the caller is responsible for freeing
624 * crp->crp_p.
625 */
626static int
627bn2crparam(const BIGNUM *a, struct crparam *crp)
628{
629 int i, j, k;
630 ssize_t bytes, bits;
631 u_char *b;
632
633 crp->crp_p = NULL;
634 crp->crp_nbits = 0;
635
636 bits = BN_num_bits(a);
637 bytes = (bits + 7) / 8;
638
639 b = malloc(bytes);
640 if (b == NULL)
641 return (1);
642
643 crp->crp_p = b;
644 crp->crp_nbits = bits;
645
646 for (i = 0, j = 0; i < a->top; i++) {
647 for (k = 0; k < BN_BITS2 / 8; k++) {
648 if ((j + k) >= bytes)
649 return (0);
650 b[j + k] = a->d[i] >> (k * 8);
651 }
652 j += BN_BITS2 / 8;
653 }
654 return (0);
655}
656
657/* Convert a /dev/crypto parameter to a BIGNUM */
658static int
659crparam2bn(struct crparam *crp, BIGNUM *a)
660{
661 u_int8_t *pd;
662 int i, bytes;
663
664 bytes = (crp->crp_nbits + 7) / 8;
665
666 if (bytes == 0)
667 return (-1);
668
669 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
670 return (-1);
671
672 for (i = 0; i < bytes; i++)
673 pd[i] = crp->crp_p[bytes - i - 1];
674
675 BN_bin2bn(pd, bytes, a);
676 free(pd);
677
678 return (0);
679}
680
681static void
682zapparams(struct crypt_kop *kop)
683{
684 int i;
685
686 for (i = 0; i <= kop->crk_iparams + kop->crk_oparams; i++) {
687 if (kop->crk_param[i].crp_p)
688 free(kop->crk_param[i].crp_p);
689 kop->crk_param[i].crp_p = NULL;
690 kop->crk_param[i].crp_nbits = 0;
691 }
692}
693
694static int
695cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s)
696{
697 int fd, ret = -1;
698
699 if ((fd = get_asym_dev_crypto()) < 0)
700 return (ret);
701
702 if (r) {
703 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
704 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
705 kop->crk_oparams++;
706 }
707 if (s) {
708 kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char));
709 kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8;
710 kop->crk_oparams++;
711 }
712
713 if (ioctl(fd, CIOCKEY, kop) == 0) {
714 if (r)
715 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
716 if (s)
717 crparam2bn(&kop->crk_param[kop->crk_iparams+1], s);
718 ret = 0;
719 }
720
721 return (ret);
722}
723
724static int
725cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
726 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
727{
728 struct crypt_kop kop;
729 int ret = 1;
730
731 /* Currently, we know we can do mod exp iff we can do any
732 * asymmetric operations at all.
733 */
734 if (cryptodev_asymfeat == 0) {
735 ret = BN_mod_exp(r, a, p, m, ctx);
736 return (ret);
737 }
738
739 memset(&kop, 0, sizeof kop);
740 kop.crk_op = CRK_MOD_EXP;
741
742 /* inputs: a^p % m */
743 if (bn2crparam(a, &kop.crk_param[0]))
744 goto err;
745 if (bn2crparam(p, &kop.crk_param[1]))
746 goto err;
747 if (bn2crparam(m, &kop.crk_param[2]))
748 goto err;
749 kop.crk_iparams = 3;
750
751 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL) == -1) {
752 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
753 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
754 }
755err:
756 zapparams(&kop);
757 return (ret);
758}
759
760static int
761cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
762{
763 int r;
764 BN_CTX *ctx;
765
766 ctx = BN_CTX_new();
767 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
768 BN_CTX_free(ctx);
769 return (r);
770}
771
772static int
773cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
774{
775 struct crypt_kop kop;
776 int ret = 1;
777
778 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
779 /* XXX 0 means failure?? */
780 return (0);
781 }
782
783 memset(&kop, 0, sizeof kop);
784 kop.crk_op = CRK_MOD_EXP_CRT;
785 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
786 if (bn2crparam(rsa->p, &kop.crk_param[0]))
787 goto err;
788 if (bn2crparam(rsa->q, &kop.crk_param[1]))
789 goto err;
790 if (bn2crparam(I, &kop.crk_param[2]))
791 goto err;
792 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
793 goto err;
794 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
795 goto err;
796 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
797 goto err;
798 kop.crk_iparams = 6;
799
800 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL) == -1) {
801 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
802 ret = (*meth->rsa_mod_exp)(r0, I, rsa);
803 }
804err:
805 zapparams(&kop);
806 return (ret);
807}
808
809static RSA_METHOD cryptodev_rsa = {
810 "cryptodev RSA method",
811 NULL, /* rsa_pub_enc */
812 NULL, /* rsa_pub_dec */
813 NULL, /* rsa_priv_enc */
814 NULL, /* rsa_priv_dec */
815 NULL,
816 NULL,
817 NULL, /* init */
818 NULL, /* finish */
819 0, /* flags */
820 NULL, /* app_data */
821 NULL, /* rsa_sign */
822 NULL /* rsa_verify */
823};
824
825static int
826cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
827 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
828{
829 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
830}
831
832static int
833cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
834 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
835 BN_CTX *ctx, BN_MONT_CTX *mont)
836{
837 BIGNUM t2;
838 int ret = 0;
839
840 BN_init(&t2);
841
842 /* v = ( g^u1 * y^u2 mod p ) mod q */
843 /* let t1 = g ^ u1 mod p */
844 ret = 0;
845
846 if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont))
847 goto err;
848
849 /* let t2 = y ^ u2 mod p */
850 if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont))
851 goto err;
852 /* let u1 = t1 * t2 mod p */
853 if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx))
854 goto err;
855
856 BN_copy(t1,u1);
857
858 ret = 1;
859err:
860 BN_free(&t2);
861 return(ret);
862}
863
864static DSA_SIG *
865cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
866{
867 struct crypt_kop kop;
868 BIGNUM *r = NULL, *s = NULL;
869 DSA_SIG *dsaret = NULL;
870
871 if ((r = BN_new()) == NULL)
872 goto err;
873 if ((s = BN_new()) == NULL) {
874 BN_free(r);
875 goto err;
876 }
877
878 memset(&kop, 0, sizeof kop);
879 kop.crk_op = CRK_DSA_SIGN;
880
881 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
882 kop.crk_param[0].crp_p = (caddr_t)dgst;
883 kop.crk_param[0].crp_nbits = dlen * 8;
884 if (bn2crparam(dsa->p, &kop.crk_param[1]))
885 goto err;
886 if (bn2crparam(dsa->q, &kop.crk_param[2]))
887 goto err;
888 if (bn2crparam(dsa->g, &kop.crk_param[3]))
889 goto err;
890 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
891 goto err;
892 kop.crk_iparams = 5;
893
894 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
895 BN_num_bytes(dsa->q), s) == 0) {
896 dsaret = DSA_SIG_new();
897 dsaret->r = r;
898 dsaret->s = s;
899 } else {
900 const DSA_METHOD *meth = DSA_OpenSSL();
901 BN_free(r);
902 BN_free(s);
903 dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa);
904 }
905err:
906 kop.crk_param[0].crp_p = NULL;
907 zapparams(&kop);
908 return (dsaret);
909}
910
911static int
912cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
913 DSA_SIG *sig, DSA *dsa)
914{
915 struct crypt_kop kop;
916 int dsaret = 1;
917
918 memset(&kop, 0, sizeof kop);
919 kop.crk_op = CRK_DSA_VERIFY;
920
921 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
922 kop.crk_param[0].crp_p = (caddr_t)dgst;
923 kop.crk_param[0].crp_nbits = dlen * 8;
924 if (bn2crparam(dsa->p, &kop.crk_param[1]))
925 goto err;
926 if (bn2crparam(dsa->q, &kop.crk_param[2]))
927 goto err;
928 if (bn2crparam(dsa->g, &kop.crk_param[3]))
929 goto err;
930 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
931 goto err;
932 if (bn2crparam(sig->r, &kop.crk_param[5]))
933 goto err;
934 if (bn2crparam(sig->s, &kop.crk_param[6]))
935 goto err;
936 kop.crk_iparams = 7;
937
938 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
939 dsaret = kop.crk_status;
940 } else {
941 const DSA_METHOD *meth = DSA_OpenSSL();
942
943 dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa);
944 }
945err:
946 kop.crk_param[0].crp_p = NULL;
947 zapparams(&kop);
948 return (dsaret);
949}
950
951static DSA_METHOD cryptodev_dsa = {
952 "cryptodev DSA method",
953 NULL,
954 NULL, /* dsa_sign_setup */
955 NULL,
956 NULL, /* dsa_mod_exp */
957 NULL,
958 NULL, /* init */
959 NULL, /* finish */
960 0, /* flags */
961 NULL /* app_data */
962};
963
964static int
965cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
966 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
967 BN_MONT_CTX *m_ctx)
968{
969 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
970}
971
972static int
973cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
974{
975 struct crypt_kop kop;
976 int dhret = 1;
977 int fd, keylen;
978
979 if ((fd = get_asym_dev_crypto()) < 0) {
980 const DH_METHOD *meth = DH_OpenSSL();
981
982 return ((meth->compute_key)(key, pub_key, dh));
983 }
984
985 keylen = BN_num_bits(dh->p);
986
987 memset(&kop, 0, sizeof kop);
988 kop.crk_op = CRK_DH_COMPUTE_KEY;
989
990 /* inputs: dh->priv_key pub_key dh->p key */
991 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
992 goto err;
993 if (bn2crparam(pub_key, &kop.crk_param[1]))
994 goto err;
995 if (bn2crparam(dh->p, &kop.crk_param[2]))
996 goto err;
997 kop.crk_iparams = 3;
998
999 kop.crk_param[3].crp_p = key;
1000 kop.crk_param[3].crp_nbits = keylen * 8;
1001 kop.crk_oparams = 1;
1002
1003 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1004 const DH_METHOD *meth = DH_OpenSSL();
1005
1006 dhret = (meth->compute_key)(key, pub_key, dh);
1007 }
1008err:
1009 kop.crk_param[3].crp_p = NULL;
1010 zapparams(&kop);
1011 return (dhret);
1012}
1013
1014static DH_METHOD cryptodev_dh = {
1015 "cryptodev DH method",
1016 NULL, /* cryptodev_dh_generate_key */
1017 NULL,
1018 NULL,
1019 NULL,
1020 NULL,
1021 0, /* flags */
1022 NULL /* app_data */
1023};
1024
1025/*
1026 * ctrl right now is just a wrapper that doesn't do much
1027 * but I expect we'll want some options soon.
1028 */
1029static int
1030cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
1031{
1032#ifdef HAVE_SYSLOG_R
1033 struct syslog_data sd = SYSLOG_DATA_INIT;
1034#endif
1035
1036 switch (cmd) {
1037 default:
1038#ifdef HAVE_SYSLOG_R
1039 syslog_r(LOG_ERR, &sd,
1040 "cryptodev_ctrl: unknown command %d", cmd);
1041#else
1042 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1043#endif
1044 break;
1045 }
1046 return (1);
1047}
1048
1049void
1050ENGINE_load_cryptodev(void)
1051{
1052 ENGINE *engine = ENGINE_new();
1053 int fd;
1054
1055 if (engine == NULL)
1056 return;
1057 if ((fd = get_dev_crypto()) < 0) {
1058 ENGINE_free(engine);
1059 return;
1060 }
1061
1062 /*
1063 * find out what asymmetric crypto algorithms we support
1064 */
1065 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1066 close(fd);
1067 ENGINE_free(engine);
1068 return;
1069 }
1070 close(fd);
1071
1072 if (!ENGINE_set_id(engine, "cryptodev") ||
1073 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1074 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1075 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1076 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1077 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1078 ENGINE_free(engine);
1079 return;
1080 }
1081
1082 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1083 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1084
1085 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1086 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1087 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1088 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1089 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1090 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1091 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1092 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1093 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1094 cryptodev_rsa.rsa_mod_exp =
1095 cryptodev_rsa_mod_exp;
1096 else
1097 cryptodev_rsa.rsa_mod_exp =
1098 cryptodev_rsa_nocrt_mod_exp;
1099 }
1100 }
1101
1102 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1103 const DSA_METHOD *meth = DSA_OpenSSL();
1104
1105 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1106 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1107 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1108 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1109 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1110 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1111 }
1112 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1113 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1114 }
1115
1116 if (ENGINE_set_DH(engine, &cryptodev_dh)){
1117 const DH_METHOD *dh_meth = DH_OpenSSL();
1118
1119 cryptodev_dh.generate_key = dh_meth->generate_key;
1120 cryptodev_dh.compute_key = dh_meth->compute_key;
1121 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1122 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1123 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1124 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1125 cryptodev_dh.compute_key =
1126 cryptodev_dh_compute_key;
1127 }
1128 }
1129
1130 ENGINE_add(engine);
1131 ENGINE_free(engine);
1132 ERR_clear_error();
1133}
1134
1135#endif /* HAVE_CRYPTODEV */
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-10 11:26:55 +0000