2 * Copyright (c) 2002 Bob Beck <beck@openbsd.org>
3 * Copyright (c) 2002 Theo de Raadt
4 * Copyright (c) 2002 Markus Friedl
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
29 #include <openssl/objects.h>
30 #include <openssl/engine.h>
31 #include <openssl/evp.h>
32 #include <openssl/bn.h>
34 #if (defined(__unix__) || defined(unix)) && !defined(USG) && \
35 (defined(OpenBSD) || defined(__FreeBSD__))
36 # include <sys/param.h>
37 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
38 # define HAVE_CRYPTODEV
40 # if (OpenBSD >= 200110)
41 # define HAVE_SYSLOG_R
45 #ifndef HAVE_CRYPTODEV
47 void ENGINE_load_cryptodev(void)
49 /* This is a NOP on platforms without /dev/crypto */
55 # include <sys/types.h>
56 # include <crypto/cryptodev.h>
57 # include <openssl/dh.h>
58 # include <openssl/dsa.h>
59 # include <openssl/err.h>
60 # include <openssl/rsa.h>
61 # include <sys/ioctl.h>
71 struct dev_crypto_state
{
72 struct session_op d_sess
;
74 # ifdef USE_CRYPTODEV_DIGESTS
75 char dummy_mac_key
[HASH_MAX_LEN
];
76 unsigned char digest_res
[HASH_MAX_LEN
];
82 static u_int32_t cryptodev_asymfeat
= 0;
84 static int get_asym_dev_crypto(void);
85 static int open_dev_crypto(void);
86 static int get_dev_crypto(void);
87 static int get_cryptodev_ciphers(const int **cnids
);
88 # ifdef USE_CRYPTODEV_DIGESTS
89 static int get_cryptodev_digests(const int **cnids
);
91 static int cryptodev_usable_ciphers(const int **nids
);
92 static int cryptodev_usable_digests(const int **nids
);
93 static int cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
94 const unsigned char *in
, size_t inl
);
95 static int cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
96 const unsigned char *iv
, int enc
);
97 static int cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
);
98 static int cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
99 const int **nids
, int nid
);
100 static int cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
101 const int **nids
, int nid
);
102 static int bn2crparam(const BIGNUM
*a
, struct crparam
*crp
);
103 static int crparam2bn(struct crparam
*crp
, BIGNUM
*a
);
104 static void zapparams(struct crypt_kop
*kop
);
105 static int cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
,
106 int slen
, BIGNUM
*s
);
108 static int cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
,
109 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
111 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
,
113 static int cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
,
115 static int cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
,
116 const BIGNUM
*p
, const BIGNUM
*m
,
117 BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
);
118 static int cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
119 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
,
120 BIGNUM
*p
, BN_CTX
*ctx
,
122 static DSA_SIG
*cryptodev_dsa_do_sign(const unsigned char *dgst
, int dlen
,
124 static int cryptodev_dsa_verify(const unsigned char *dgst
, int dgst_len
,
125 DSA_SIG
*sig
, DSA
*dsa
);
126 static int cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
127 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
129 static int cryptodev_dh_compute_key(unsigned char *key
, const BIGNUM
*pub_key
,
131 static int cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
,
133 void ENGINE_load_cryptodev(void);
135 static const ENGINE_CMD_DEFN cryptodev_defns
[] = {
146 CRYPTO_ARC4
, NID_rc4
, 0, 16,
149 CRYPTO_DES_CBC
, NID_des_cbc
, 8, 8,
152 CRYPTO_3DES_CBC
, NID_des_ede3_cbc
, 8, 24,
155 CRYPTO_AES_CBC
, NID_aes_128_cbc
, 16, 16,
158 CRYPTO_AES_CBC
, NID_aes_192_cbc
, 16, 24,
161 CRYPTO_AES_CBC
, NID_aes_256_cbc
, 16, 32,
163 # ifdef CRYPTO_AES_CTR
165 CRYPTO_AES_CTR
, NID_aes_128_ctr
, 14, 16,
168 CRYPTO_AES_CTR
, NID_aes_192_ctr
, 14, 24,
171 CRYPTO_AES_CTR
, NID_aes_256_ctr
, 14, 32,
175 CRYPTO_BLF_CBC
, NID_bf_cbc
, 8, 16,
178 CRYPTO_CAST_CBC
, NID_cast5_cbc
, 8, 16,
181 CRYPTO_SKIPJACK_CBC
, NID_undef
, 0, 0,
188 # ifdef USE_CRYPTODEV_DIGESTS
195 CRYPTO_MD5_HMAC
, NID_hmacWithMD5
, 16
198 CRYPTO_SHA1_HMAC
, NID_hmacWithSHA1
, 20
201 CRYPTO_RIPEMD160_HMAC
, NID_ripemd160
, 16
205 CRYPTO_MD5_KPDK
, NID_undef
, 0
208 CRYPTO_SHA1_KPDK
, NID_undef
, 0
211 CRYPTO_MD5
, NID_md5
, 16
214 CRYPTO_SHA1
, NID_sha1
, 20
223 * Return a fd if /dev/crypto seems usable, 0 otherwise.
225 static int open_dev_crypto(void)
230 if ((fd
= open("/dev/crypto", O_RDWR
, 0)) == -1)
233 if (fcntl(fd
, F_SETFD
, 1) == -1) {
242 static int get_dev_crypto(void)
246 if ((fd
= open_dev_crypto()) == -1)
248 # ifndef CRIOGET_NOT_NEEDED
249 if (ioctl(fd
, CRIOGET
, &retfd
) == -1)
253 if (fcntl(retfd
, F_SETFD
, 1) == -1) {
263 static void put_dev_crypto(int fd
)
265 # ifndef CRIOGET_NOT_NEEDED
270 /* Caching version for asym operations */
271 static int get_asym_dev_crypto(void)
276 fd
= get_dev_crypto();
281 * Find out what ciphers /dev/crypto will let us have a session for.
282 * XXX note, that some of these openssl doesn't deal with yet!
283 * returning them here is harmless, as long as we return NULL
284 * when asked for a handler in the cryptodev_engine_ciphers routine
286 static int get_cryptodev_ciphers(const int **cnids
)
288 static int nids
[CRYPTO_ALGORITHM_MAX
];
289 struct session_op sess
;
290 int fd
, i
, count
= 0;
292 if ((fd
= get_dev_crypto()) < 0) {
296 memset(&sess
, 0, sizeof(sess
));
297 sess
.key
= (caddr_t
) "123456789abcdefghijklmno";
299 for (i
= 0; ciphers
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
300 if (ciphers
[i
].nid
== NID_undef
)
302 sess
.cipher
= ciphers
[i
].id
;
303 sess
.keylen
= ciphers
[i
].keylen
;
305 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
306 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
307 nids
[count
++] = ciphers
[i
].nid
;
318 # ifdef USE_CRYPTODEV_DIGESTS
320 * Find out what digests /dev/crypto will let us have a session for.
321 * XXX note, that some of these openssl doesn't deal with yet!
322 * returning them here is harmless, as long as we return NULL
323 * when asked for a handler in the cryptodev_engine_digests routine
325 static int get_cryptodev_digests(const int **cnids
)
327 static int nids
[CRYPTO_ALGORITHM_MAX
];
328 struct session_op sess
;
329 int fd
, i
, count
= 0;
331 if ((fd
= get_dev_crypto()) < 0) {
335 memset(&sess
, 0, sizeof(sess
));
336 sess
.mackey
= (caddr_t
) "123456789abcdefghijklmno";
337 for (i
= 0; digests
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
338 if (digests
[i
].nid
== NID_undef
)
340 sess
.mac
= digests
[i
].id
;
341 sess
.mackeylen
= digests
[i
].keylen
;
343 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
344 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
345 nids
[count
++] = digests
[i
].nid
;
358 * Find the useable ciphers|digests from dev/crypto - this is the first
359 * thing called by the engine init crud which determines what it
360 * can use for ciphers from this engine. We want to return
361 * only what we can do, anythine else is handled by software.
363 * If we can't initialize the device to do anything useful for
364 * any reason, we want to return a NULL array, and 0 length,
365 * which forces everything to be done is software. By putting
366 * the initalization of the device in here, we ensure we can
367 * use this engine as the default, and if for whatever reason
368 * /dev/crypto won't do what we want it will just be done in
371 * This can (should) be greatly expanded to perhaps take into
372 * account speed of the device, and what we want to do.
373 * (although the disabling of particular alg's could be controlled
374 * by the device driver with sysctl's.) - this is where we
375 * want most of the decisions made about what we actually want
376 * to use from /dev/crypto.
378 static int cryptodev_usable_ciphers(const int **nids
)
380 return (get_cryptodev_ciphers(nids
));
383 static int cryptodev_usable_digests(const int **nids
)
385 # ifdef USE_CRYPTODEV_DIGESTS
386 return (get_cryptodev_digests(nids
));
389 * XXXX just disable all digests for now, because it sucks.
390 * we need a better way to decide this - i.e. I may not
391 * want digests on slow cards like hifn on fast machines,
392 * but might want them on slow or loaded machines, etc.
393 * will also want them when using crypto cards that don't
394 * suck moose gonads - would be nice to be able to decide something
395 * as reasonable default without having hackery that's card dependent.
396 * of course, the default should probably be just do everything,
397 * with perhaps a sysctl to turn algoritms off (or have them off
398 * by default) on cards that generally suck like the hifn.
406 cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
407 const unsigned char *in
, size_t inl
)
409 struct crypt_op cryp
;
410 struct dev_crypto_state
*state
= ctx
->cipher_data
;
411 struct session_op
*sess
= &state
->d_sess
;
413 unsigned char save_iv
[EVP_MAX_IV_LENGTH
];
419 if ((inl
% ctx
->cipher
->block_size
) != 0)
422 memset(&cryp
, 0, sizeof(cryp
));
424 cryp
.ses
= sess
->ses
;
427 cryp
.src
= (caddr_t
) in
;
428 cryp
.dst
= (caddr_t
) out
;
431 cryp
.op
= ctx
->encrypt
? COP_ENCRYPT
: COP_DECRYPT
;
433 if (ctx
->cipher
->iv_len
) {
434 cryp
.iv
= (caddr_t
) ctx
->iv
;
436 iiv
= in
+ inl
- ctx
->cipher
->iv_len
;
437 memcpy(save_iv
, iiv
, ctx
->cipher
->iv_len
);
442 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) == -1) {
444 * XXX need better errror handling this can fail for a number of
450 if (ctx
->cipher
->iv_len
) {
452 iiv
= out
+ inl
- ctx
->cipher
->iv_len
;
455 memcpy(ctx
->iv
, iiv
, ctx
->cipher
->iv_len
);
461 cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
462 const unsigned char *iv
, int enc
)
464 struct dev_crypto_state
*state
= ctx
->cipher_data
;
465 struct session_op
*sess
= &state
->d_sess
;
468 for (i
= 0; ciphers
[i
].id
; i
++)
469 if (ctx
->cipher
->nid
== ciphers
[i
].nid
&&
470 ctx
->cipher
->iv_len
<= ciphers
[i
].ivmax
&&
471 ctx
->key_len
== ciphers
[i
].keylen
) {
472 cipher
= ciphers
[i
].id
;
476 if (!ciphers
[i
].id
) {
481 memset(sess
, 0, sizeof(*sess
));
483 if ((state
->d_fd
= get_dev_crypto()) < 0)
486 sess
->key
= (caddr_t
) key
;
487 sess
->keylen
= ctx
->key_len
;
488 sess
->cipher
= cipher
;
490 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) == -1) {
491 put_dev_crypto(state
->d_fd
);
499 * free anything we allocated earlier when initting a
500 * session, and close the session.
502 static int cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
)
505 struct dev_crypto_state
*state
= ctx
->cipher_data
;
506 struct session_op
*sess
= &state
->d_sess
;
512 * XXX if this ioctl fails, someting's wrong. the invoker may have called
513 * us with a bogus ctx, or we could have a device that for whatever
514 * reason just doesn't want to play ball - it's not clear what's right
515 * here - should this be an error? should it just increase a counter,
516 * hmm. For right now, we return 0 - I don't believe that to be "right".
517 * we could call the gorpy openssl lib error handlers that print messages
518 * to users of the library. hmm..
521 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) == -1) {
526 put_dev_crypto(state
->d_fd
);
533 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
534 * gets called when libcrypto requests a cipher NID.
538 const EVP_CIPHER cryptodev_rc4
= {
541 EVP_CIPH_VARIABLE_LENGTH
,
545 sizeof(struct dev_crypto_state
),
552 const EVP_CIPHER cryptodev_des_cbc
= {
559 sizeof(struct dev_crypto_state
),
560 EVP_CIPHER_set_asn1_iv
,
561 EVP_CIPHER_get_asn1_iv
,
566 const EVP_CIPHER cryptodev_3des_cbc
= {
573 sizeof(struct dev_crypto_state
),
574 EVP_CIPHER_set_asn1_iv
,
575 EVP_CIPHER_get_asn1_iv
,
579 const EVP_CIPHER cryptodev_bf_cbc
= {
586 sizeof(struct dev_crypto_state
),
587 EVP_CIPHER_set_asn1_iv
,
588 EVP_CIPHER_get_asn1_iv
,
592 const EVP_CIPHER cryptodev_cast_cbc
= {
599 sizeof(struct dev_crypto_state
),
600 EVP_CIPHER_set_asn1_iv
,
601 EVP_CIPHER_get_asn1_iv
,
605 const EVP_CIPHER cryptodev_aes_cbc
= {
612 sizeof(struct dev_crypto_state
),
613 EVP_CIPHER_set_asn1_iv
,
614 EVP_CIPHER_get_asn1_iv
,
618 const EVP_CIPHER cryptodev_aes_192_cbc
= {
625 sizeof(struct dev_crypto_state
),
626 EVP_CIPHER_set_asn1_iv
,
627 EVP_CIPHER_get_asn1_iv
,
631 const EVP_CIPHER cryptodev_aes_256_cbc
= {
638 sizeof(struct dev_crypto_state
),
639 EVP_CIPHER_set_asn1_iv
,
640 EVP_CIPHER_get_asn1_iv
,
644 # ifdef CRYPTO_AES_CTR
645 const EVP_CIPHER cryptodev_aes_ctr
= {
652 sizeof(struct dev_crypto_state
),
653 EVP_CIPHER_set_asn1_iv
,
654 EVP_CIPHER_get_asn1_iv
,
658 const EVP_CIPHER cryptodev_aes_ctr_192
= {
665 sizeof(struct dev_crypto_state
),
666 EVP_CIPHER_set_asn1_iv
,
667 EVP_CIPHER_get_asn1_iv
,
671 const EVP_CIPHER cryptodev_aes_ctr_256
= {
678 sizeof(struct dev_crypto_state
),
679 EVP_CIPHER_set_asn1_iv
,
680 EVP_CIPHER_get_asn1_iv
,
685 * Registered by the ENGINE when used to find out how to deal with
686 * a particular NID in the ENGINE. this says what we'll do at the
687 * top level - note, that list is restricted by what we answer with
690 cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
691 const int **nids
, int nid
)
694 return (cryptodev_usable_ciphers(nids
));
698 *cipher
= &cryptodev_rc4
;
700 case NID_des_ede3_cbc
:
701 *cipher
= &cryptodev_3des_cbc
;
704 *cipher
= &cryptodev_des_cbc
;
707 *cipher
= &cryptodev_bf_cbc
;
710 *cipher
= &cryptodev_cast_cbc
;
712 case NID_aes_128_cbc
:
713 *cipher
= &cryptodev_aes_cbc
;
715 case NID_aes_192_cbc
:
716 *cipher
= &cryptodev_aes_192_cbc
;
718 case NID_aes_256_cbc
:
719 *cipher
= &cryptodev_aes_256_cbc
;
721 # ifdef CRYPTO_AES_CTR
722 case NID_aes_128_ctr
:
723 *cipher
= &cryptodev_aes_ctr
;
725 case NID_aes_192_ctr
:
726 *cipher
= &cryptodev_aes_ctr_192
;
728 case NID_aes_256_ctr
:
729 *cipher
= &cryptodev_aes_ctr_256
;
736 return (*cipher
!= NULL
);
739 # ifdef USE_CRYPTODEV_DIGESTS
741 /* convert digest type to cryptodev */
742 static int digest_nid_to_cryptodev(int nid
)
746 for (i
= 0; digests
[i
].id
; i
++)
747 if (digests
[i
].nid
== nid
)
748 return (digests
[i
].id
);
752 static int digest_key_length(int nid
)
756 for (i
= 0; digests
[i
].id
; i
++)
757 if (digests
[i
].nid
== nid
)
758 return digests
[i
].keylen
;
762 static int cryptodev_digest_init(EVP_MD_CTX
*ctx
)
764 struct dev_crypto_state
*state
= ctx
->md_data
;
765 struct session_op
*sess
= &state
->d_sess
;
768 if ((digest
= digest_nid_to_cryptodev(ctx
->digest
->type
)) == NID_undef
) {
769 printf("cryptodev_digest_init: Can't get digest \n");
773 memset(state
, 0, sizeof(*state
));
775 if ((state
->d_fd
= get_dev_crypto()) < 0) {
776 printf("cryptodev_digest_init: Can't get Dev \n");
780 sess
->mackey
= state
->dummy_mac_key
;
781 sess
->mackeylen
= digest_key_length(ctx
->digest
->type
);
784 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) < 0) {
785 put_dev_crypto(state
->d_fd
);
787 printf("cryptodev_digest_init: Open session failed\n");
794 static int cryptodev_digest_update(EVP_MD_CTX
*ctx
, const void *data
,
797 struct crypt_op cryp
;
798 struct dev_crypto_state
*state
= ctx
->md_data
;
799 struct session_op
*sess
= &state
->d_sess
;
802 if (!data
|| state
->d_fd
< 0) {
803 printf("cryptodev_digest_update: illegal inputs \n");
811 if (!(ctx
->flags
& EVP_MD_CTX_FLAG_ONESHOT
)) {
812 /* if application doesn't support one buffer */
814 OPENSSL_realloc(state
->mac_data
, state
->mac_len
+ count
);
817 printf("cryptodev_digest_update: realloc failed\n");
820 state
->mac_data
= new_mac_data
;
822 memcpy(state
->mac_data
+ state
->mac_len
, data
, count
);
823 state
->mac_len
+= count
;
828 memset(&cryp
, 0, sizeof(cryp
));
830 cryp
.ses
= sess
->ses
;
833 cryp
.src
= (caddr_t
) data
;
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");
843 static int cryptodev_digest_final(EVP_MD_CTX
*ctx
, unsigned char *md
)
845 struct crypt_op cryp
;
846 struct dev_crypto_state
*state
= ctx
->md_data
;
847 struct session_op
*sess
= &state
->d_sess
;
851 if (!md
|| state
->d_fd
< 0) {
852 printf("cryptodev_digest_final: illegal input\n");
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
;
861 cryp
.len
= state
->mac_len
;
862 cryp
.src
= state
->mac_data
;
864 cryp
.mac
= (caddr_t
) md
;
865 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) < 0) {
866 printf("cryptodev_digest_final: digest failed\n");
873 memcpy(md
, state
->digest_res
, ctx
->digest
->md_size
);
878 static int cryptodev_digest_cleanup(EVP_MD_CTX
*ctx
)
881 struct dev_crypto_state
*state
= ctx
->md_data
;
882 struct session_op
*sess
= &state
->d_sess
;
887 if (state
->d_fd
< 0) {
888 printf("cryptodev_digest_cleanup: illegal input\n");
892 OPENSSL_free(state
->mac_data
);
893 state
->mac_data
= NULL
;
896 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) < 0) {
897 printf("cryptodev_digest_cleanup: failed to close session\n");
902 put_dev_crypto(state
->d_fd
);
908 static int cryptodev_digest_copy(EVP_MD_CTX
*to
, const EVP_MD_CTX
*from
)
910 struct dev_crypto_state
*fstate
= from
->md_data
;
911 struct dev_crypto_state
*dstate
= to
->md_data
;
912 struct session_op
*sess
;
915 if (dstate
== NULL
|| fstate
== NULL
)
918 memcpy(dstate
, fstate
, sizeof(struct dev_crypto_state
));
920 sess
= &dstate
->d_sess
;
922 digest
= digest_nid_to_cryptodev(to
->digest
->type
);
924 sess
->mackey
= dstate
->dummy_mac_key
;
925 sess
->mackeylen
= digest_key_length(to
->digest
->type
);
928 dstate
->d_fd
= get_dev_crypto();
930 if (ioctl(dstate
->d_fd
, CIOCGSESSION
, sess
) < 0) {
931 put_dev_crypto(dstate
->d_fd
);
933 printf("cryptodev_digest_copy: Open session failed\n");
937 if (fstate
->mac_len
!= 0) {
938 if (fstate
->mac_data
!= NULL
) {
939 dstate
->mac_data
= OPENSSL_malloc(fstate
->mac_len
);
940 if (dstate
->mac_data
== NULL
) {
941 printf("cryptodev_digest_copy: mac_data allocation failed\n");
944 memcpy(dstate
->mac_data
, fstate
->mac_data
, fstate
->mac_len
);
945 dstate
->mac_len
= fstate
->mac_len
;
952 const EVP_MD cryptodev_sha1
= {
957 cryptodev_digest_init
,
958 cryptodev_digest_update
,
959 cryptodev_digest_final
,
960 cryptodev_digest_copy
,
961 cryptodev_digest_cleanup
,
962 EVP_PKEY_NULL_method
,
964 sizeof(struct dev_crypto_state
),
967 const EVP_MD cryptodev_md5
= {
970 16 /* MD5_DIGEST_LENGTH */ ,
972 cryptodev_digest_init
,
973 cryptodev_digest_update
,
974 cryptodev_digest_final
,
975 cryptodev_digest_copy
,
976 cryptodev_digest_cleanup
,
977 EVP_PKEY_NULL_method
,
978 64 /* MD5_CBLOCK */ ,
979 sizeof(struct dev_crypto_state
),
982 # endif /* USE_CRYPTODEV_DIGESTS */
985 cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
986 const int **nids
, int nid
)
989 return (cryptodev_usable_digests(nids
));
992 # ifdef USE_CRYPTODEV_DIGESTS
994 *digest
= &cryptodev_md5
;
997 *digest
= &cryptodev_sha1
;
1000 # endif /* USE_CRYPTODEV_DIGESTS */
1004 return (*digest
!= NULL
);
1008 * Convert a BIGNUM to the representation that /dev/crypto needs.
1009 * Upon completion of use, the caller is responsible for freeing
1012 static int bn2crparam(const BIGNUM
*a
, struct crparam
*crp
)
1014 ssize_t bytes
, bits
;
1020 bits
= BN_num_bits(a
);
1021 bytes
= BN_num_bytes(a
);
1023 b
= OPENSSL_zalloc(bytes
);
1027 crp
->crp_p
= (caddr_t
) b
;
1028 crp
->crp_nbits
= bits
;
1034 /* Convert a /dev/crypto parameter to a BIGNUM */
1035 static int crparam2bn(struct crparam
*crp
, BIGNUM
*a
)
1040 bytes
= (crp
->crp_nbits
+ 7) / 8;
1045 if ((pd
= OPENSSL_malloc(bytes
)) == NULL
)
1048 for (i
= 0; i
< bytes
; i
++)
1049 pd
[i
] = crp
->crp_p
[bytes
- i
- 1];
1051 BN_bin2bn(pd
, bytes
, a
);
1057 static void zapparams(struct crypt_kop
*kop
)
1061 for (i
= 0; i
< kop
->crk_iparams
+ kop
->crk_oparams
; i
++) {
1062 if (kop
->crk_param
[i
].crp_p
)
1063 free(kop
->crk_param
[i
].crp_p
);
1064 kop
->crk_param
[i
].crp_p
= NULL
;
1065 kop
->crk_param
[i
].crp_nbits
= 0;
1070 cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
, int slen
,
1075 if ((fd
= get_asym_dev_crypto()) < 0)
1079 kop
->crk_param
[kop
->crk_iparams
].crp_p
= calloc(rlen
, sizeof(char));
1080 kop
->crk_param
[kop
->crk_iparams
].crp_nbits
= rlen
* 8;
1084 kop
->crk_param
[kop
->crk_iparams
+ 1].crp_p
=
1085 calloc(slen
, sizeof(char));
1086 kop
->crk_param
[kop
->crk_iparams
+ 1].crp_nbits
= slen
* 8;
1090 if (ioctl(fd
, CIOCKEY
, kop
) == 0) {
1092 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
], r
);
1094 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
+ 1], s
);
1102 cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
, const BIGNUM
*p
,
1103 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*in_mont
)
1105 struct crypt_kop kop
;
1109 * Currently, we know we can do mod exp iff we can do any asymmetric
1110 * operations at all.
1112 if (cryptodev_asymfeat
== 0) {
1113 ret
= BN_mod_exp(r
, a
, p
, m
, ctx
);
1117 memset(&kop
, 0, sizeof(kop
));
1118 kop
.crk_op
= CRK_MOD_EXP
;
1120 /* inputs: a^p % m */
1121 if (bn2crparam(a
, &kop
.crk_param
[0]))
1123 if (bn2crparam(p
, &kop
.crk_param
[1]))
1125 if (bn2crparam(m
, &kop
.crk_param
[2]))
1127 kop
.crk_iparams
= 3;
1129 if (cryptodev_asym(&kop
, BN_num_bytes(m
), r
, 0, NULL
)) {
1130 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1131 printf("OCF asym process failed, Running in software\n");
1132 ret
= meth
->bn_mod_exp(r
, a
, p
, m
, ctx
, in_mont
);
1134 } else if (ECANCELED
== kop
.crk_status
) {
1135 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1136 printf("OCF hardware operation cancelled. Running in Software\n");
1137 ret
= meth
->bn_mod_exp(r
, a
, p
, m
, ctx
, in_mont
);
1139 /* else cryptodev operation worked ok ==> ret = 1 */
1147 cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
,
1152 r
= cryptodev_bn_mod_exp(r0
, I
, rsa
->d
, rsa
->n
, ctx
, NULL
);
1158 cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
)
1160 struct crypt_kop kop
;
1163 if (!rsa
->p
|| !rsa
->q
|| !rsa
->dmp1
|| !rsa
->dmq1
|| !rsa
->iqmp
) {
1164 /* XXX 0 means failure?? */
1168 memset(&kop
, 0, sizeof(kop
));
1169 kop
.crk_op
= CRK_MOD_EXP_CRT
;
1170 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
1171 if (bn2crparam(rsa
->p
, &kop
.crk_param
[0]))
1173 if (bn2crparam(rsa
->q
, &kop
.crk_param
[1]))
1175 if (bn2crparam(I
, &kop
.crk_param
[2]))
1177 if (bn2crparam(rsa
->dmp1
, &kop
.crk_param
[3]))
1179 if (bn2crparam(rsa
->dmq1
, &kop
.crk_param
[4]))
1181 if (bn2crparam(rsa
->iqmp
, &kop
.crk_param
[5]))
1183 kop
.crk_iparams
= 6;
1185 if (cryptodev_asym(&kop
, BN_num_bytes(rsa
->n
), r0
, 0, NULL
)) {
1186 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1187 printf("OCF asym process failed, running in Software\n");
1188 ret
= (*meth
->rsa_mod_exp
) (r0
, I
, rsa
, ctx
);
1190 } else if (ECANCELED
== kop
.crk_status
) {
1191 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1192 printf("OCF hardware operation cancelled. Running in Software\n");
1193 ret
= (*meth
->rsa_mod_exp
) (r0
, I
, rsa
, ctx
);
1195 /* else cryptodev operation worked ok ==> ret = 1 */
1202 static RSA_METHOD cryptodev_rsa
= {
1203 "cryptodev RSA method",
1204 NULL
, /* rsa_pub_enc */
1205 NULL
, /* rsa_pub_dec */
1206 NULL
, /* rsa_priv_enc */
1207 NULL
, /* rsa_priv_dec */
1213 NULL
, /* app_data */
1214 NULL
, /* rsa_sign */
1215 NULL
/* rsa_verify */
1219 cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
, const BIGNUM
*p
,
1220 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
)
1222 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
1226 cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
1227 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
, BIGNUM
*p
,
1228 BN_CTX
*ctx
, BN_MONT_CTX
*mont
)
1235 /* v = ( g^u1 * y^u2 mod p ) mod q */
1236 /* let t1 = g ^ u1 mod p */
1239 if (!dsa
->meth
->bn_mod_exp(dsa
, t1
, dsa
->g
, u1
, dsa
->p
, ctx
, mont
))
1242 /* let t2 = y ^ u2 mod p */
1243 if (!dsa
->meth
->bn_mod_exp(dsa
, t2
, dsa
->pub_key
, u2
, dsa
->p
, ctx
, mont
))
1245 /* let u1 = t1 * t2 mod p */
1246 if (!BN_mod_mul(u1
, t1
, t2
, dsa
->p
, ctx
))
1257 static DSA_SIG
*cryptodev_dsa_do_sign(const unsigned char *dgst
, int dlen
,
1260 struct crypt_kop kop
;
1261 BIGNUM
*r
= NULL
, *s
= NULL
;
1262 DSA_SIG
*dsaret
= NULL
;
1264 if ((r
= BN_new()) == NULL
)
1266 if ((s
= BN_new()) == NULL
) {
1271 memset(&kop
, 0, sizeof(kop
));
1272 kop
.crk_op
= CRK_DSA_SIGN
;
1274 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
1275 kop
.crk_param
[0].crp_p
= (caddr_t
) dgst
;
1276 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
1277 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
1279 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
1281 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
1283 if (bn2crparam(dsa
->priv_key
, &kop
.crk_param
[4]))
1285 kop
.crk_iparams
= 5;
1287 if (cryptodev_asym(&kop
, BN_num_bytes(dsa
->q
), r
,
1288 BN_num_bytes(dsa
->q
), s
) == 0) {
1289 dsaret
= DSA_SIG_new();
1293 const DSA_METHOD
*meth
= DSA_OpenSSL();
1296 dsaret
= (meth
->dsa_do_sign
) (dgst
, dlen
, dsa
);
1299 kop
.crk_param
[0].crp_p
= NULL
;
1305 cryptodev_dsa_verify(const unsigned char *dgst
, int dlen
,
1306 DSA_SIG
*sig
, DSA
*dsa
)
1308 struct crypt_kop kop
;
1311 memset(&kop
, 0, sizeof(kop
));
1312 kop
.crk_op
= CRK_DSA_VERIFY
;
1314 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
1315 kop
.crk_param
[0].crp_p
= (caddr_t
) dgst
;
1316 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
1317 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
1319 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
1321 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
1323 if (bn2crparam(dsa
->pub_key
, &kop
.crk_param
[4]))
1325 if (bn2crparam(sig
->r
, &kop
.crk_param
[5]))
1327 if (bn2crparam(sig
->s
, &kop
.crk_param
[6]))
1329 kop
.crk_iparams
= 7;
1331 if (cryptodev_asym(&kop
, 0, NULL
, 0, NULL
) == 0) {
1333 * OCF success value is 0, if not zero, change dsaret to fail
1335 if (0 != kop
.crk_status
)
1338 const DSA_METHOD
*meth
= DSA_OpenSSL();
1340 dsaret
= (meth
->dsa_do_verify
) (dgst
, dlen
, sig
, dsa
);
1343 kop
.crk_param
[0].crp_p
= NULL
;
1348 static DSA_METHOD cryptodev_dsa
= {
1349 "cryptodev DSA method",
1351 NULL
, /* dsa_sign_setup */
1353 NULL
, /* dsa_mod_exp */
1362 cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
1363 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
1366 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
1370 cryptodev_dh_compute_key(unsigned char *key
, const BIGNUM
*pub_key
, DH
*dh
)
1372 struct crypt_kop kop
;
1376 if ((fd
= get_asym_dev_crypto()) < 0) {
1377 const DH_METHOD
*meth
= DH_OpenSSL();
1379 return ((meth
->compute_key
) (key
, pub_key
, dh
));
1382 keylen
= BN_num_bits(dh
->p
);
1384 memset(&kop
, 0, sizeof(kop
));
1385 kop
.crk_op
= CRK_DH_COMPUTE_KEY
;
1387 /* inputs: dh->priv_key pub_key dh->p key */
1388 if (bn2crparam(dh
->priv_key
, &kop
.crk_param
[0]))
1390 if (bn2crparam(pub_key
, &kop
.crk_param
[1]))
1392 if (bn2crparam(dh
->p
, &kop
.crk_param
[2]))
1394 kop
.crk_iparams
= 3;
1396 kop
.crk_param
[3].crp_p
= (caddr_t
) key
;
1397 kop
.crk_param
[3].crp_nbits
= keylen
* 8;
1398 kop
.crk_oparams
= 1;
1400 if (ioctl(fd
, CIOCKEY
, &kop
) == -1) {
1401 const DH_METHOD
*meth
= DH_OpenSSL();
1403 dhret
= (meth
->compute_key
) (key
, pub_key
, dh
);
1406 kop
.crk_param
[3].crp_p
= NULL
;
1411 static DH_METHOD cryptodev_dh
= {
1412 "cryptodev DH method",
1413 NULL
, /* cryptodev_dh_generate_key */
1423 * ctrl right now is just a wrapper that doesn't do much
1424 * but I expect we'll want some options soon.
1427 cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
, void (*f
) (void))
1429 # ifdef HAVE_SYSLOG_R
1430 struct syslog_data sd
= SYSLOG_DATA_INIT
;
1435 # ifdef HAVE_SYSLOG_R
1436 syslog_r(LOG_ERR
, &sd
, "cryptodev_ctrl: unknown command %d", cmd
);
1438 syslog(LOG_ERR
, "cryptodev_ctrl: unknown command %d", cmd
);
1445 void ENGINE_load_cryptodev(void)
1447 ENGINE
*engine
= ENGINE_new();
1452 if ((fd
= get_dev_crypto()) < 0) {
1453 ENGINE_free(engine
);
1458 * find out what asymmetric crypto algorithms we support
1460 if (ioctl(fd
, CIOCASYMFEAT
, &cryptodev_asymfeat
) == -1) {
1462 ENGINE_free(engine
);
1467 if (!ENGINE_set_id(engine
, "cryptodev") ||
1468 !ENGINE_set_name(engine
, "BSD cryptodev engine") ||
1469 !ENGINE_set_ciphers(engine
, cryptodev_engine_ciphers
) ||
1470 !ENGINE_set_digests(engine
, cryptodev_engine_digests
) ||
1471 !ENGINE_set_ctrl_function(engine
, cryptodev_ctrl
) ||
1472 !ENGINE_set_cmd_defns(engine
, cryptodev_defns
)) {
1473 ENGINE_free(engine
);
1477 if (ENGINE_set_RSA(engine
, &cryptodev_rsa
)) {
1478 const RSA_METHOD
*rsa_meth
= RSA_PKCS1_SSLeay();
1480 cryptodev_rsa
.bn_mod_exp
= rsa_meth
->bn_mod_exp
;
1481 cryptodev_rsa
.rsa_mod_exp
= rsa_meth
->rsa_mod_exp
;
1482 cryptodev_rsa
.rsa_pub_enc
= rsa_meth
->rsa_pub_enc
;
1483 cryptodev_rsa
.rsa_pub_dec
= rsa_meth
->rsa_pub_dec
;
1484 cryptodev_rsa
.rsa_priv_enc
= rsa_meth
->rsa_priv_enc
;
1485 cryptodev_rsa
.rsa_priv_dec
= rsa_meth
->rsa_priv_dec
;
1486 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1487 cryptodev_rsa
.bn_mod_exp
= cryptodev_bn_mod_exp
;
1488 if (cryptodev_asymfeat
& CRF_MOD_EXP_CRT
)
1489 cryptodev_rsa
.rsa_mod_exp
= cryptodev_rsa_mod_exp
;
1491 cryptodev_rsa
.rsa_mod_exp
= cryptodev_rsa_nocrt_mod_exp
;
1495 if (ENGINE_set_DSA(engine
, &cryptodev_dsa
)) {
1496 const DSA_METHOD
*meth
= DSA_OpenSSL();
1498 memcpy(&cryptodev_dsa
, meth
, sizeof(DSA_METHOD
));
1499 if (cryptodev_asymfeat
& CRF_DSA_SIGN
)
1500 cryptodev_dsa
.dsa_do_sign
= cryptodev_dsa_do_sign
;
1501 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1502 cryptodev_dsa
.bn_mod_exp
= cryptodev_dsa_bn_mod_exp
;
1503 cryptodev_dsa
.dsa_mod_exp
= cryptodev_dsa_dsa_mod_exp
;
1505 if (cryptodev_asymfeat
& CRF_DSA_VERIFY
)
1506 cryptodev_dsa
.dsa_do_verify
= cryptodev_dsa_verify
;
1509 if (ENGINE_set_DH(engine
, &cryptodev_dh
)) {
1510 const DH_METHOD
*dh_meth
= DH_OpenSSL();
1512 cryptodev_dh
.generate_key
= dh_meth
->generate_key
;
1513 cryptodev_dh
.compute_key
= dh_meth
->compute_key
;
1514 cryptodev_dh
.bn_mod_exp
= dh_meth
->bn_mod_exp
;
1515 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1516 cryptodev_dh
.bn_mod_exp
= cryptodev_mod_exp_dh
;
1517 if (cryptodev_asymfeat
& CRF_DH_COMPUTE_KEY
)
1518 cryptodev_dh
.compute_key
= cryptodev_dh_compute_key
;
1523 ENGINE_free(engine
);
1527 #endif /* HAVE_CRYPTODEV */