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 #include <sys/types.h>
47 # include <crypto/cryptodev.h>
48 # include <sys/ioctl.h>
58 #include <openssl/dh.h>
59 #include <openssl/dsa.h>
60 #include <openssl/err.h>
61 #include <openssl/rsa.h>
63 #ifndef HAVE_CRYPTODEV
65 void ENGINE_load_cryptodev(void)
67 /* This is a NOP on platforms without /dev/crypto */
73 struct dev_crypto_state
{
74 struct session_op d_sess
;
76 # ifdef USE_CRYPTODEV_DIGESTS
77 char dummy_mac_key
[HASH_MAX_LEN
];
78 unsigned char digest_res
[HASH_MAX_LEN
];
84 static u_int32_t cryptodev_asymfeat
= 0;
86 static int get_asym_dev_crypto(void);
87 static int open_dev_crypto(void);
88 static int get_dev_crypto(void);
89 static int get_cryptodev_ciphers(const int **cnids
);
90 # ifdef USE_CRYPTODEV_DIGESTS
91 static int get_cryptodev_digests(const int **cnids
);
93 static int cryptodev_usable_ciphers(const int **nids
);
94 static int cryptodev_usable_digests(const int **nids
);
95 static int cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
96 const unsigned char *in
, size_t inl
);
97 static int cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
98 const unsigned char *iv
, int enc
);
99 static int cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
);
100 static int cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
101 const int **nids
, int nid
);
102 static int cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
103 const int **nids
, int nid
);
104 static int bn2crparam(const BIGNUM
*a
, struct crparam
*crp
);
105 static int crparam2bn(struct crparam
*crp
, BIGNUM
*a
);
106 static void zapparams(struct crypt_kop
*kop
);
107 static int cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
,
108 int slen
, BIGNUM
*s
);
110 static int cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
,
111 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
113 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
,
115 static int cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
,
117 static int cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
,
118 const BIGNUM
*p
, const BIGNUM
*m
,
119 BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
);
120 static int cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
121 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
,
122 BIGNUM
*p
, BN_CTX
*ctx
,
124 static DSA_SIG
*cryptodev_dsa_do_sign(const unsigned char *dgst
, int dlen
,
126 static int cryptodev_dsa_verify(const unsigned char *dgst
, int dgst_len
,
127 DSA_SIG
*sig
, DSA
*dsa
);
128 static int cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
129 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
131 static int cryptodev_dh_compute_key(unsigned char *key
, const BIGNUM
*pub_key
,
133 static int cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
,
135 void ENGINE_load_cryptodev(void);
137 static const ENGINE_CMD_DEFN cryptodev_defns
[] = {
148 CRYPTO_ARC4
, NID_rc4
, 0, 16,
151 CRYPTO_DES_CBC
, NID_des_cbc
, 8, 8,
154 CRYPTO_3DES_CBC
, NID_des_ede3_cbc
, 8, 24,
157 CRYPTO_AES_CBC
, NID_aes_128_cbc
, 16, 16,
160 CRYPTO_AES_CBC
, NID_aes_192_cbc
, 16, 24,
163 CRYPTO_AES_CBC
, NID_aes_256_cbc
, 16, 32,
165 # ifdef CRYPTO_AES_CTR
167 CRYPTO_AES_CTR
, NID_aes_128_ctr
, 14, 16,
170 CRYPTO_AES_CTR
, NID_aes_192_ctr
, 14, 24,
173 CRYPTO_AES_CTR
, NID_aes_256_ctr
, 14, 32,
177 CRYPTO_BLF_CBC
, NID_bf_cbc
, 8, 16,
180 CRYPTO_CAST_CBC
, NID_cast5_cbc
, 8, 16,
183 CRYPTO_SKIPJACK_CBC
, NID_undef
, 0, 0,
190 # ifdef USE_CRYPTODEV_DIGESTS
197 CRYPTO_MD5_HMAC
, NID_hmacWithMD5
, 16
200 CRYPTO_SHA1_HMAC
, NID_hmacWithSHA1
, 20
203 CRYPTO_RIPEMD160_HMAC
, NID_ripemd160
, 16
207 CRYPTO_MD5_KPDK
, NID_undef
, 0
210 CRYPTO_SHA1_KPDK
, NID_undef
, 0
213 CRYPTO_MD5
, NID_md5
, 16
216 CRYPTO_SHA1
, NID_sha1
, 20
225 * Return a fd if /dev/crypto seems usable, 0 otherwise.
227 static int open_dev_crypto(void)
232 if ((fd
= open("/dev/crypto", O_RDWR
, 0)) == -1)
235 if (fcntl(fd
, F_SETFD
, 1) == -1) {
244 static int get_dev_crypto(void)
248 if ((fd
= open_dev_crypto()) == -1)
250 # ifndef CRIOGET_NOT_NEEDED
251 if (ioctl(fd
, CRIOGET
, &retfd
) == -1)
255 if (fcntl(retfd
, F_SETFD
, 1) == -1) {
265 static void put_dev_crypto(int fd
)
267 # ifndef CRIOGET_NOT_NEEDED
272 /* Caching version for asym operations */
273 static int get_asym_dev_crypto(void)
278 fd
= get_dev_crypto();
283 * Find out what ciphers /dev/crypto will let us have a session for.
284 * XXX note, that some of these openssl doesn't deal with yet!
285 * returning them here is harmless, as long as we return NULL
286 * when asked for a handler in the cryptodev_engine_ciphers routine
288 static int get_cryptodev_ciphers(const int **cnids
)
290 static int nids
[CRYPTO_ALGORITHM_MAX
];
291 struct session_op sess
;
292 int fd
, i
, count
= 0;
294 if ((fd
= get_dev_crypto()) < 0) {
298 memset(&sess
, 0, sizeof(sess
));
299 sess
.key
= (caddr_t
) "123456789abcdefghijklmno";
301 for (i
= 0; ciphers
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
302 if (ciphers
[i
].nid
== NID_undef
)
304 sess
.cipher
= ciphers
[i
].id
;
305 sess
.keylen
= ciphers
[i
].keylen
;
307 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
308 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
309 nids
[count
++] = ciphers
[i
].nid
;
320 # ifdef USE_CRYPTODEV_DIGESTS
322 * Find out what digests /dev/crypto will let us have a session for.
323 * XXX note, that some of these openssl doesn't deal with yet!
324 * returning them here is harmless, as long as we return NULL
325 * when asked for a handler in the cryptodev_engine_digests routine
327 static int get_cryptodev_digests(const int **cnids
)
329 static int nids
[CRYPTO_ALGORITHM_MAX
];
330 struct session_op sess
;
331 int fd
, i
, count
= 0;
333 if ((fd
= get_dev_crypto()) < 0) {
337 memset(&sess
, 0, sizeof(sess
));
338 sess
.mackey
= (caddr_t
) "123456789abcdefghijklmno";
339 for (i
= 0; digests
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
340 if (digests
[i
].nid
== NID_undef
)
342 sess
.mac
= digests
[i
].id
;
343 sess
.mackeylen
= digests
[i
].keylen
;
345 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
346 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
347 nids
[count
++] = digests
[i
].nid
;
360 * Find the useable ciphers|digests from dev/crypto - this is the first
361 * thing called by the engine init crud which determines what it
362 * can use for ciphers from this engine. We want to return
363 * only what we can do, anythine else is handled by software.
365 * If we can't initialize the device to do anything useful for
366 * any reason, we want to return a NULL array, and 0 length,
367 * which forces everything to be done is software. By putting
368 * the initalization of the device in here, we ensure we can
369 * use this engine as the default, and if for whatever reason
370 * /dev/crypto won't do what we want it will just be done in
373 * This can (should) be greatly expanded to perhaps take into
374 * account speed of the device, and what we want to do.
375 * (although the disabling of particular alg's could be controlled
376 * by the device driver with sysctl's.) - this is where we
377 * want most of the decisions made about what we actually want
378 * to use from /dev/crypto.
380 static int cryptodev_usable_ciphers(const int **nids
)
382 return (get_cryptodev_ciphers(nids
));
385 static int cryptodev_usable_digests(const int **nids
)
387 # ifdef USE_CRYPTODEV_DIGESTS
388 return (get_cryptodev_digests(nids
));
391 * XXXX just disable all digests for now, because it sucks.
392 * we need a better way to decide this - i.e. I may not
393 * want digests on slow cards like hifn on fast machines,
394 * but might want them on slow or loaded machines, etc.
395 * will also want them when using crypto cards that don't
396 * suck moose gonads - would be nice to be able to decide something
397 * as reasonable default without having hackery that's card dependent.
398 * of course, the default should probably be just do everything,
399 * with perhaps a sysctl to turn algoritms off (or have them off
400 * by default) on cards that generally suck like the hifn.
408 cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
409 const unsigned char *in
, size_t inl
)
411 struct crypt_op cryp
;
412 struct dev_crypto_state
*state
= ctx
->cipher_data
;
413 struct session_op
*sess
= &state
->d_sess
;
415 unsigned char save_iv
[EVP_MAX_IV_LENGTH
];
421 if ((inl
% ctx
->cipher
->block_size
) != 0)
424 memset(&cryp
, 0, sizeof(cryp
));
426 cryp
.ses
= sess
->ses
;
429 cryp
.src
= (caddr_t
) in
;
430 cryp
.dst
= (caddr_t
) out
;
433 cryp
.op
= ctx
->encrypt
? COP_ENCRYPT
: COP_DECRYPT
;
435 if (ctx
->cipher
->iv_len
) {
436 cryp
.iv
= (caddr_t
) ctx
->iv
;
438 iiv
= in
+ inl
- ctx
->cipher
->iv_len
;
439 memcpy(save_iv
, iiv
, ctx
->cipher
->iv_len
);
444 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) == -1) {
446 * XXX need better errror handling this can fail for a number of
452 if (ctx
->cipher
->iv_len
) {
454 iiv
= out
+ inl
- ctx
->cipher
->iv_len
;
457 memcpy(ctx
->iv
, iiv
, ctx
->cipher
->iv_len
);
463 cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
464 const unsigned char *iv
, int enc
)
466 struct dev_crypto_state
*state
= ctx
->cipher_data
;
467 struct session_op
*sess
= &state
->d_sess
;
470 for (i
= 0; ciphers
[i
].id
; i
++)
471 if (ctx
->cipher
->nid
== ciphers
[i
].nid
&&
472 ctx
->cipher
->iv_len
<= ciphers
[i
].ivmax
&&
473 ctx
->key_len
== ciphers
[i
].keylen
) {
474 cipher
= ciphers
[i
].id
;
478 if (!ciphers
[i
].id
) {
483 memset(sess
, 0, sizeof(*sess
));
485 if ((state
->d_fd
= get_dev_crypto()) < 0)
488 sess
->key
= (caddr_t
) key
;
489 sess
->keylen
= ctx
->key_len
;
490 sess
->cipher
= cipher
;
492 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) == -1) {
493 put_dev_crypto(state
->d_fd
);
501 * free anything we allocated earlier when initting a
502 * session, and close the session.
504 static int cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
)
507 struct dev_crypto_state
*state
= ctx
->cipher_data
;
508 struct session_op
*sess
= &state
->d_sess
;
514 * XXX if this ioctl fails, someting's wrong. the invoker may have called
515 * us with a bogus ctx, or we could have a device that for whatever
516 * reason just doesn't want to play ball - it's not clear what's right
517 * here - should this be an error? should it just increase a counter,
518 * hmm. For right now, we return 0 - I don't believe that to be "right".
519 * we could call the gorpy openssl lib error handlers that print messages
520 * to users of the library. hmm..
523 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) == -1) {
528 put_dev_crypto(state
->d_fd
);
535 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
536 * gets called when libcrypto requests a cipher NID.
540 static const EVP_CIPHER cryptodev_rc4
= {
543 EVP_CIPH_VARIABLE_LENGTH
,
547 sizeof(struct dev_crypto_state
),
554 static const EVP_CIPHER cryptodev_des_cbc
= {
561 sizeof(struct dev_crypto_state
),
562 EVP_CIPHER_set_asn1_iv
,
563 EVP_CIPHER_get_asn1_iv
,
568 static const EVP_CIPHER cryptodev_3des_cbc
= {
575 sizeof(struct dev_crypto_state
),
576 EVP_CIPHER_set_asn1_iv
,
577 EVP_CIPHER_get_asn1_iv
,
581 static const EVP_CIPHER cryptodev_bf_cbc
= {
588 sizeof(struct dev_crypto_state
),
589 EVP_CIPHER_set_asn1_iv
,
590 EVP_CIPHER_get_asn1_iv
,
594 static const EVP_CIPHER cryptodev_cast_cbc
= {
601 sizeof(struct dev_crypto_state
),
602 EVP_CIPHER_set_asn1_iv
,
603 EVP_CIPHER_get_asn1_iv
,
607 static const EVP_CIPHER cryptodev_aes_cbc
= {
614 sizeof(struct dev_crypto_state
),
615 EVP_CIPHER_set_asn1_iv
,
616 EVP_CIPHER_get_asn1_iv
,
620 static const EVP_CIPHER cryptodev_aes_192_cbc
= {
627 sizeof(struct dev_crypto_state
),
628 EVP_CIPHER_set_asn1_iv
,
629 EVP_CIPHER_get_asn1_iv
,
633 static const EVP_CIPHER cryptodev_aes_256_cbc
= {
640 sizeof(struct dev_crypto_state
),
641 EVP_CIPHER_set_asn1_iv
,
642 EVP_CIPHER_get_asn1_iv
,
646 # ifdef CRYPTO_AES_CTR
647 const EVP_CIPHER cryptodev_aes_ctr
= {
654 sizeof(struct dev_crypto_state
),
655 EVP_CIPHER_set_asn1_iv
,
656 EVP_CIPHER_get_asn1_iv
,
660 const EVP_CIPHER cryptodev_aes_ctr_192
= {
667 sizeof(struct dev_crypto_state
),
668 EVP_CIPHER_set_asn1_iv
,
669 EVP_CIPHER_get_asn1_iv
,
673 const EVP_CIPHER cryptodev_aes_ctr_256
= {
680 sizeof(struct dev_crypto_state
),
681 EVP_CIPHER_set_asn1_iv
,
682 EVP_CIPHER_get_asn1_iv
,
687 * Registered by the ENGINE when used to find out how to deal with
688 * a particular NID in the ENGINE. this says what we'll do at the
689 * top level - note, that list is restricted by what we answer with
692 cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
693 const int **nids
, int nid
)
696 return (cryptodev_usable_ciphers(nids
));
700 *cipher
= &cryptodev_rc4
;
702 case NID_des_ede3_cbc
:
703 *cipher
= &cryptodev_3des_cbc
;
706 *cipher
= &cryptodev_des_cbc
;
709 *cipher
= &cryptodev_bf_cbc
;
712 *cipher
= &cryptodev_cast_cbc
;
714 case NID_aes_128_cbc
:
715 *cipher
= &cryptodev_aes_cbc
;
717 case NID_aes_192_cbc
:
718 *cipher
= &cryptodev_aes_192_cbc
;
720 case NID_aes_256_cbc
:
721 *cipher
= &cryptodev_aes_256_cbc
;
723 # ifdef CRYPTO_AES_CTR
724 case NID_aes_128_ctr
:
725 *cipher
= &cryptodev_aes_ctr
;
727 case NID_aes_192_ctr
:
728 *cipher
= &cryptodev_aes_ctr_192
;
730 case NID_aes_256_ctr
:
731 *cipher
= &cryptodev_aes_ctr_256
;
738 return (*cipher
!= NULL
);
741 # ifdef USE_CRYPTODEV_DIGESTS
743 /* convert digest type to cryptodev */
744 static int digest_nid_to_cryptodev(int nid
)
748 for (i
= 0; digests
[i
].id
; i
++)
749 if (digests
[i
].nid
== nid
)
750 return (digests
[i
].id
);
754 static int digest_key_length(int nid
)
758 for (i
= 0; digests
[i
].id
; i
++)
759 if (digests
[i
].nid
== nid
)
760 return digests
[i
].keylen
;
764 static int cryptodev_digest_init(EVP_MD_CTX
*ctx
)
766 struct dev_crypto_state
*state
= ctx
->md_data
;
767 struct session_op
*sess
= &state
->d_sess
;
770 if ((digest
= digest_nid_to_cryptodev(ctx
->digest
->type
)) == NID_undef
) {
771 printf("cryptodev_digest_init: Can't get digest \n");
775 memset(state
, 0, sizeof(*state
));
777 if ((state
->d_fd
= get_dev_crypto()) < 0) {
778 printf("cryptodev_digest_init: Can't get Dev \n");
782 sess
->mackey
= state
->dummy_mac_key
;
783 sess
->mackeylen
= digest_key_length(ctx
->digest
->type
);
786 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) < 0) {
787 put_dev_crypto(state
->d_fd
);
789 printf("cryptodev_digest_init: Open session failed\n");
796 static int cryptodev_digest_update(EVP_MD_CTX
*ctx
, const void *data
,
799 struct crypt_op cryp
;
800 struct dev_crypto_state
*state
= ctx
->md_data
;
801 struct session_op
*sess
= &state
->d_sess
;
804 if (!data
|| state
->d_fd
< 0) {
805 printf("cryptodev_digest_update: illegal inputs \n");
813 if (!(ctx
->flags
& EVP_MD_CTX_FLAG_ONESHOT
)) {
814 /* if application doesn't support one buffer */
816 OPENSSL_realloc(state
->mac_data
, state
->mac_len
+ count
);
819 printf("cryptodev_digest_update: realloc failed\n");
822 state
->mac_data
= new_mac_data
;
824 memcpy(state
->mac_data
+ state
->mac_len
, data
, count
);
825 state
->mac_len
+= count
;
830 memset(&cryp
, 0, sizeof(cryp
));
832 cryp
.ses
= sess
->ses
;
835 cryp
.src
= (caddr_t
) data
;
837 cryp
.mac
= (caddr_t
) state
->digest_res
;
838 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) < 0) {
839 printf("cryptodev_digest_update: digest failed\n");
845 static int cryptodev_digest_final(EVP_MD_CTX
*ctx
, unsigned char *md
)
847 struct crypt_op cryp
;
848 struct dev_crypto_state
*state
= ctx
->md_data
;
849 struct session_op
*sess
= &state
->d_sess
;
853 if (!md
|| state
->d_fd
< 0) {
854 printf("cryptodev_digest_final: illegal input\n");
858 if (!(ctx
->flags
& EVP_MD_CTX_FLAG_ONESHOT
)) {
859 /* if application doesn't support one buffer */
860 memset(&cryp
, 0, sizeof(cryp
));
861 cryp
.ses
= sess
->ses
;
863 cryp
.len
= state
->mac_len
;
864 cryp
.src
= state
->mac_data
;
866 cryp
.mac
= (caddr_t
) md
;
867 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) < 0) {
868 printf("cryptodev_digest_final: digest failed\n");
875 memcpy(md
, state
->digest_res
, ctx
->digest
->md_size
);
880 static int cryptodev_digest_cleanup(EVP_MD_CTX
*ctx
)
883 struct dev_crypto_state
*state
= ctx
->md_data
;
884 struct session_op
*sess
= &state
->d_sess
;
889 if (state
->d_fd
< 0) {
890 printf("cryptodev_digest_cleanup: illegal input\n");
894 OPENSSL_free(state
->mac_data
);
895 state
->mac_data
= NULL
;
898 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) < 0) {
899 printf("cryptodev_digest_cleanup: failed to close session\n");
904 put_dev_crypto(state
->d_fd
);
910 static int cryptodev_digest_copy(EVP_MD_CTX
*to
, const EVP_MD_CTX
*from
)
912 struct dev_crypto_state
*fstate
= from
->md_data
;
913 struct dev_crypto_state
*dstate
= to
->md_data
;
914 struct session_op
*sess
;
917 if (dstate
== NULL
|| fstate
== NULL
)
920 memcpy(dstate
, fstate
, sizeof(struct dev_crypto_state
));
922 sess
= &dstate
->d_sess
;
924 digest
= digest_nid_to_cryptodev(to
->digest
->type
);
926 sess
->mackey
= dstate
->dummy_mac_key
;
927 sess
->mackeylen
= digest_key_length(to
->digest
->type
);
930 dstate
->d_fd
= get_dev_crypto();
932 if (ioctl(dstate
->d_fd
, CIOCGSESSION
, sess
) < 0) {
933 put_dev_crypto(dstate
->d_fd
);
935 printf("cryptodev_digest_copy: Open session failed\n");
939 if (fstate
->mac_len
!= 0) {
940 if (fstate
->mac_data
!= NULL
) {
941 dstate
->mac_data
= OPENSSL_malloc(fstate
->mac_len
);
942 if (dstate
->mac_data
== NULL
) {
943 printf("cryptodev_digest_copy: mac_data allocation failed\n");
946 memcpy(dstate
->mac_data
, fstate
->mac_data
, fstate
->mac_len
);
947 dstate
->mac_len
= fstate
->mac_len
;
954 const EVP_MD cryptodev_sha1
= {
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
,
966 sizeof(struct dev_crypto_state
),
969 const EVP_MD cryptodev_md5
= {
972 16 /* MD5_DIGEST_LENGTH */ ,
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
),
984 # endif /* USE_CRYPTODEV_DIGESTS */
987 cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
988 const int **nids
, int nid
)
991 return (cryptodev_usable_digests(nids
));
994 # ifdef USE_CRYPTODEV_DIGESTS
996 *digest
= &cryptodev_md5
;
999 *digest
= &cryptodev_sha1
;
1002 # endif /* USE_CRYPTODEV_DIGESTS */
1006 return (*digest
!= NULL
);
1010 * Convert a BIGNUM to the representation that /dev/crypto needs.
1011 * Upon completion of use, the caller is responsible for freeing
1014 static int bn2crparam(const BIGNUM
*a
, struct crparam
*crp
)
1016 ssize_t bytes
, bits
;
1022 bits
= BN_num_bits(a
);
1023 bytes
= BN_num_bytes(a
);
1025 b
= OPENSSL_zalloc(bytes
);
1029 crp
->crp_p
= (caddr_t
) b
;
1030 crp
->crp_nbits
= bits
;
1036 /* Convert a /dev/crypto parameter to a BIGNUM */
1037 static int crparam2bn(struct crparam
*crp
, BIGNUM
*a
)
1042 bytes
= (crp
->crp_nbits
+ 7) / 8;
1047 if ((pd
= OPENSSL_malloc(bytes
)) == NULL
)
1050 for (i
= 0; i
< bytes
; i
++)
1051 pd
[i
] = crp
->crp_p
[bytes
- i
- 1];
1053 BN_bin2bn(pd
, bytes
, a
);
1059 static void zapparams(struct crypt_kop
*kop
)
1063 for (i
= 0; i
< kop
->crk_iparams
+ kop
->crk_oparams
; i
++) {
1064 if (kop
->crk_param
[i
].crp_p
)
1065 free(kop
->crk_param
[i
].crp_p
);
1066 kop
->crk_param
[i
].crp_p
= NULL
;
1067 kop
->crk_param
[i
].crp_nbits
= 0;
1072 cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
, int slen
,
1077 if ((fd
= get_asym_dev_crypto()) < 0)
1081 kop
->crk_param
[kop
->crk_iparams
].crp_p
= calloc(rlen
, sizeof(char));
1082 kop
->crk_param
[kop
->crk_iparams
].crp_nbits
= rlen
* 8;
1086 kop
->crk_param
[kop
->crk_iparams
+ 1].crp_p
=
1087 calloc(slen
, sizeof(char));
1088 kop
->crk_param
[kop
->crk_iparams
+ 1].crp_nbits
= slen
* 8;
1092 if (ioctl(fd
, CIOCKEY
, kop
) == 0) {
1094 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
], r
);
1096 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
+ 1], s
);
1104 cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
, const BIGNUM
*p
,
1105 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*in_mont
)
1107 struct crypt_kop kop
;
1111 * Currently, we know we can do mod exp iff we can do any asymmetric
1112 * operations at all.
1114 if (cryptodev_asymfeat
== 0) {
1115 ret
= BN_mod_exp(r
, a
, p
, m
, ctx
);
1119 memset(&kop
, 0, sizeof(kop
));
1120 kop
.crk_op
= CRK_MOD_EXP
;
1122 /* inputs: a^p % m */
1123 if (bn2crparam(a
, &kop
.crk_param
[0]))
1125 if (bn2crparam(p
, &kop
.crk_param
[1]))
1127 if (bn2crparam(m
, &kop
.crk_param
[2]))
1129 kop
.crk_iparams
= 3;
1131 if (cryptodev_asym(&kop
, BN_num_bytes(m
), r
, 0, NULL
)) {
1132 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1133 printf("OCF asym process failed, Running in software\n");
1134 ret
= meth
->bn_mod_exp(r
, a
, p
, m
, ctx
, in_mont
);
1136 } else if (ECANCELED
== kop
.crk_status
) {
1137 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1138 printf("OCF hardware operation cancelled. Running in Software\n");
1139 ret
= meth
->bn_mod_exp(r
, a
, p
, m
, ctx
, in_mont
);
1141 /* else cryptodev operation worked ok ==> ret = 1 */
1149 cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
,
1154 r
= cryptodev_bn_mod_exp(r0
, I
, rsa
->d
, rsa
->n
, ctx
, NULL
);
1160 cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
)
1162 struct crypt_kop kop
;
1165 if (!rsa
->p
|| !rsa
->q
|| !rsa
->dmp1
|| !rsa
->dmq1
|| !rsa
->iqmp
) {
1166 /* XXX 0 means failure?? */
1170 memset(&kop
, 0, sizeof(kop
));
1171 kop
.crk_op
= CRK_MOD_EXP_CRT
;
1172 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
1173 if (bn2crparam(rsa
->p
, &kop
.crk_param
[0]))
1175 if (bn2crparam(rsa
->q
, &kop
.crk_param
[1]))
1177 if (bn2crparam(I
, &kop
.crk_param
[2]))
1179 if (bn2crparam(rsa
->dmp1
, &kop
.crk_param
[3]))
1181 if (bn2crparam(rsa
->dmq1
, &kop
.crk_param
[4]))
1183 if (bn2crparam(rsa
->iqmp
, &kop
.crk_param
[5]))
1185 kop
.crk_iparams
= 6;
1187 if (cryptodev_asym(&kop
, BN_num_bytes(rsa
->n
), r0
, 0, NULL
)) {
1188 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1189 printf("OCF asym process failed, running in Software\n");
1190 ret
= (*meth
->rsa_mod_exp
) (r0
, I
, rsa
, ctx
);
1192 } else if (ECANCELED
== kop
.crk_status
) {
1193 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1194 printf("OCF hardware operation cancelled. Running in Software\n");
1195 ret
= (*meth
->rsa_mod_exp
) (r0
, I
, rsa
, ctx
);
1197 /* else cryptodev operation worked ok ==> ret = 1 */
1204 static RSA_METHOD cryptodev_rsa
= {
1205 "cryptodev RSA method",
1206 NULL
, /* rsa_pub_enc */
1207 NULL
, /* rsa_pub_dec */
1208 NULL
, /* rsa_priv_enc */
1209 NULL
, /* rsa_priv_dec */
1215 NULL
, /* app_data */
1216 NULL
, /* rsa_sign */
1217 NULL
/* rsa_verify */
1221 cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
, const BIGNUM
*p
,
1222 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
)
1224 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
1228 cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
1229 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
, BIGNUM
*p
,
1230 BN_CTX
*ctx
, BN_MONT_CTX
*mont
)
1237 /* v = ( g^u1 * y^u2 mod p ) mod q */
1238 /* let t1 = g ^ u1 mod p */
1241 if (!dsa
->meth
->bn_mod_exp(dsa
, t1
, dsa
->g
, u1
, dsa
->p
, ctx
, mont
))
1244 /* let t2 = y ^ u2 mod p */
1245 if (!dsa
->meth
->bn_mod_exp(dsa
, t2
, dsa
->pub_key
, u2
, dsa
->p
, ctx
, mont
))
1247 /* let u1 = t1 * t2 mod p */
1248 if (!BN_mod_mul(u1
, t1
, t2
, dsa
->p
, ctx
))
1259 static DSA_SIG
*cryptodev_dsa_do_sign(const unsigned char *dgst
, int dlen
,
1262 struct crypt_kop kop
;
1263 BIGNUM
*r
= NULL
, *s
= NULL
;
1264 DSA_SIG
*dsaret
= NULL
;
1266 if ((r
= BN_new()) == NULL
)
1268 if ((s
= BN_new()) == NULL
) {
1273 memset(&kop
, 0, sizeof(kop
));
1274 kop
.crk_op
= CRK_DSA_SIGN
;
1276 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
1277 kop
.crk_param
[0].crp_p
= (caddr_t
) dgst
;
1278 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
1279 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
1281 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
1283 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
1285 if (bn2crparam(dsa
->priv_key
, &kop
.crk_param
[4]))
1287 kop
.crk_iparams
= 5;
1289 if (cryptodev_asym(&kop
, BN_num_bytes(dsa
->q
), r
,
1290 BN_num_bytes(dsa
->q
), s
) == 0) {
1291 dsaret
= DSA_SIG_new();
1295 const DSA_METHOD
*meth
= DSA_OpenSSL();
1298 dsaret
= (meth
->dsa_do_sign
) (dgst
, dlen
, dsa
);
1301 kop
.crk_param
[0].crp_p
= NULL
;
1307 cryptodev_dsa_verify(const unsigned char *dgst
, int dlen
,
1308 DSA_SIG
*sig
, DSA
*dsa
)
1310 struct crypt_kop kop
;
1313 memset(&kop
, 0, sizeof(kop
));
1314 kop
.crk_op
= CRK_DSA_VERIFY
;
1316 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
1317 kop
.crk_param
[0].crp_p
= (caddr_t
) dgst
;
1318 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
1319 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
1321 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
1323 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
1325 if (bn2crparam(dsa
->pub_key
, &kop
.crk_param
[4]))
1327 if (bn2crparam(sig
->r
, &kop
.crk_param
[5]))
1329 if (bn2crparam(sig
->s
, &kop
.crk_param
[6]))
1331 kop
.crk_iparams
= 7;
1333 if (cryptodev_asym(&kop
, 0, NULL
, 0, NULL
) == 0) {
1335 * OCF success value is 0, if not zero, change dsaret to fail
1337 if (0 != kop
.crk_status
)
1340 const DSA_METHOD
*meth
= DSA_OpenSSL();
1342 dsaret
= (meth
->dsa_do_verify
) (dgst
, dlen
, sig
, dsa
);
1345 kop
.crk_param
[0].crp_p
= NULL
;
1350 static DSA_METHOD cryptodev_dsa
= {
1351 "cryptodev DSA method",
1353 NULL
, /* dsa_sign_setup */
1355 NULL
, /* dsa_mod_exp */
1364 cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
1365 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
1368 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
1372 cryptodev_dh_compute_key(unsigned char *key
, const BIGNUM
*pub_key
, DH
*dh
)
1374 struct crypt_kop kop
;
1378 if ((fd
= get_asym_dev_crypto()) < 0) {
1379 const DH_METHOD
*meth
= DH_OpenSSL();
1381 return ((meth
->compute_key
) (key
, pub_key
, dh
));
1384 keylen
= BN_num_bits(dh
->p
);
1386 memset(&kop
, 0, sizeof(kop
));
1387 kop
.crk_op
= CRK_DH_COMPUTE_KEY
;
1389 /* inputs: dh->priv_key pub_key dh->p key */
1390 if (bn2crparam(dh
->priv_key
, &kop
.crk_param
[0]))
1392 if (bn2crparam(pub_key
, &kop
.crk_param
[1]))
1394 if (bn2crparam(dh
->p
, &kop
.crk_param
[2]))
1396 kop
.crk_iparams
= 3;
1398 kop
.crk_param
[3].crp_p
= (caddr_t
) key
;
1399 kop
.crk_param
[3].crp_nbits
= keylen
* 8;
1400 kop
.crk_oparams
= 1;
1402 if (ioctl(fd
, CIOCKEY
, &kop
) == -1) {
1403 const DH_METHOD
*meth
= DH_OpenSSL();
1405 dhret
= (meth
->compute_key
) (key
, pub_key
, dh
);
1408 kop
.crk_param
[3].crp_p
= NULL
;
1413 static DH_METHOD cryptodev_dh
= {
1414 "cryptodev DH method",
1415 NULL
, /* cryptodev_dh_generate_key */
1425 * ctrl right now is just a wrapper that doesn't do much
1426 * but I expect we'll want some options soon.
1429 cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
, void (*f
) (void))
1431 # ifdef HAVE_SYSLOG_R
1432 struct syslog_data sd
= SYSLOG_DATA_INIT
;
1437 # ifdef HAVE_SYSLOG_R
1438 syslog_r(LOG_ERR
, &sd
, "cryptodev_ctrl: unknown command %d", cmd
);
1440 syslog(LOG_ERR
, "cryptodev_ctrl: unknown command %d", cmd
);
1447 void ENGINE_load_cryptodev(void)
1449 ENGINE
*engine
= ENGINE_new();
1454 if ((fd
= get_dev_crypto()) < 0) {
1455 ENGINE_free(engine
);
1460 * find out what asymmetric crypto algorithms we support
1462 if (ioctl(fd
, CIOCASYMFEAT
, &cryptodev_asymfeat
) == -1) {
1464 ENGINE_free(engine
);
1469 if (!ENGINE_set_id(engine
, "cryptodev") ||
1470 !ENGINE_set_name(engine
, "BSD cryptodev engine") ||
1471 !ENGINE_set_ciphers(engine
, cryptodev_engine_ciphers
) ||
1472 !ENGINE_set_digests(engine
, cryptodev_engine_digests
) ||
1473 !ENGINE_set_ctrl_function(engine
, cryptodev_ctrl
) ||
1474 !ENGINE_set_cmd_defns(engine
, cryptodev_defns
)) {
1475 ENGINE_free(engine
);
1479 if (ENGINE_set_RSA(engine
, &cryptodev_rsa
)) {
1480 const RSA_METHOD
*rsa_meth
= RSA_PKCS1_SSLeay();
1482 cryptodev_rsa
.bn_mod_exp
= rsa_meth
->bn_mod_exp
;
1483 cryptodev_rsa
.rsa_mod_exp
= rsa_meth
->rsa_mod_exp
;
1484 cryptodev_rsa
.rsa_pub_enc
= rsa_meth
->rsa_pub_enc
;
1485 cryptodev_rsa
.rsa_pub_dec
= rsa_meth
->rsa_pub_dec
;
1486 cryptodev_rsa
.rsa_priv_enc
= rsa_meth
->rsa_priv_enc
;
1487 cryptodev_rsa
.rsa_priv_dec
= rsa_meth
->rsa_priv_dec
;
1488 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1489 cryptodev_rsa
.bn_mod_exp
= cryptodev_bn_mod_exp
;
1490 if (cryptodev_asymfeat
& CRF_MOD_EXP_CRT
)
1491 cryptodev_rsa
.rsa_mod_exp
= cryptodev_rsa_mod_exp
;
1493 cryptodev_rsa
.rsa_mod_exp
= cryptodev_rsa_nocrt_mod_exp
;
1497 if (ENGINE_set_DSA(engine
, &cryptodev_dsa
)) {
1498 const DSA_METHOD
*meth
= DSA_OpenSSL();
1500 memcpy(&cryptodev_dsa
, meth
, sizeof(DSA_METHOD
));
1501 if (cryptodev_asymfeat
& CRF_DSA_SIGN
)
1502 cryptodev_dsa
.dsa_do_sign
= cryptodev_dsa_do_sign
;
1503 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1504 cryptodev_dsa
.bn_mod_exp
= cryptodev_dsa_bn_mod_exp
;
1505 cryptodev_dsa
.dsa_mod_exp
= cryptodev_dsa_dsa_mod_exp
;
1507 if (cryptodev_asymfeat
& CRF_DSA_VERIFY
)
1508 cryptodev_dsa
.dsa_do_verify
= cryptodev_dsa_verify
;
1511 if (ENGINE_set_DH(engine
, &cryptodev_dh
)) {
1512 const DH_METHOD
*dh_meth
= DH_OpenSSL();
1514 cryptodev_dh
.generate_key
= dh_meth
->generate_key
;
1515 cryptodev_dh
.compute_key
= dh_meth
->compute_key
;
1516 cryptodev_dh
.bn_mod_exp
= dh_meth
->bn_mod_exp
;
1517 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1518 cryptodev_dh
.bn_mod_exp
= cryptodev_mod_exp_dh
;
1519 if (cryptodev_asymfeat
& CRF_DH_COMPUTE_KEY
)
1520 cryptodev_dh
.compute_key
= cryptodev_dh_compute_key
;
1525 ENGINE_free(engine
);
1529 #endif /* HAVE_CRYPTODEV */