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
48 ENGINE_load_cryptodev(void)
50 /* This is a NOP on platforms without /dev/crypto */
56 #include <sys/types.h>
57 #include <crypto/cryptodev.h>
58 #include <sys/ioctl.h>
68 struct dev_crypto_state
{
69 struct session_op d_sess
;
72 #ifdef USE_CRYPTODEV_DIGESTS
73 char dummy_mac_key
[HASH_MAX_LEN
];
75 unsigned char digest_res
[HASH_MAX_LEN
];
83 static u_int32_t cryptodev_asymfeat
= 0;
85 static int get_asym_dev_crypto(void);
86 static int open_dev_crypto(void);
87 static int get_dev_crypto(void);
88 static int get_cryptodev_ciphers(const int **cnids
);
89 static int get_cryptodev_digests(const int **cnids
);
90 static int cryptodev_usable_ciphers(const int **nids
);
91 static int cryptodev_usable_digests(const int **nids
);
92 static int cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
93 const unsigned char *in
, size_t inl
);
94 static int cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
95 const unsigned char *iv
, int enc
);
96 static int cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
);
97 static int cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
98 const int **nids
, int nid
);
99 static int cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
100 const int **nids
, int nid
);
101 static int bn2crparam(const BIGNUM
*a
, struct crparam
*crp
);
102 static int crparam2bn(struct crparam
*crp
, BIGNUM
*a
);
103 static void zapparams(struct crypt_kop
*kop
);
104 static int cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
,
105 int slen
, BIGNUM
*s
);
107 static int cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
,
108 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
);
109 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
,
110 RSA
*rsa
, BN_CTX
*ctx
);
111 static int cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
);
112 static int cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
,
113 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
);
114 static int cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
115 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
, BIGNUM
*p
,
116 BN_CTX
*ctx
, BN_MONT_CTX
*mont
);
117 static DSA_SIG
*cryptodev_dsa_do_sign(const unsigned char *dgst
,
119 static int cryptodev_dsa_verify(const unsigned char *dgst
, int dgst_len
,
120 DSA_SIG
*sig
, DSA
*dsa
);
121 static int cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
122 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
124 static int cryptodev_dh_compute_key(unsigned char *key
,
125 const BIGNUM
*pub_key
, DH
*dh
);
126 static int cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
,
128 void ENGINE_load_cryptodev(void);
130 static const ENGINE_CMD_DEFN cryptodev_defns
[] = {
140 { CRYPTO_ARC4
, NID_rc4
, 0, 16, },
141 { CRYPTO_DES_CBC
, NID_des_cbc
, 8, 8, },
142 { CRYPTO_3DES_CBC
, NID_des_ede3_cbc
, 8, 24, },
143 { CRYPTO_AES_CBC
, NID_aes_128_cbc
, 16, 16, },
144 { CRYPTO_AES_CBC
, NID_aes_192_cbc
, 16, 24, },
145 { CRYPTO_AES_CBC
, NID_aes_256_cbc
, 16, 32, },
146 { CRYPTO_BLF_CBC
, NID_bf_cbc
, 8, 16, },
147 { CRYPTO_CAST_CBC
, NID_cast5_cbc
, 8, 16, },
148 { CRYPTO_SKIPJACK_CBC
, NID_undef
, 0, 0, },
149 { 0, NID_undef
, 0, 0, },
157 { CRYPTO_MD5_HMAC
, NID_hmacWithMD5
, 16},
158 { CRYPTO_SHA1_HMAC
, NID_hmacWithSHA1
, 20},
159 { CRYPTO_RIPEMD160_HMAC
, NID_ripemd160
, 16/*?*/},
160 { CRYPTO_MD5_KPDK
, NID_undef
, 0},
161 { CRYPTO_SHA1_KPDK
, NID_undef
, 0},
162 { CRYPTO_MD5
, NID_md5
, 16},
163 { CRYPTO_SHA1
, NID_sha1
, 20},
168 * Return a fd if /dev/crypto seems usable, 0 otherwise.
171 open_dev_crypto(void)
176 if ((fd
= open("/dev/crypto", O_RDWR
, 0)) == -1)
179 if (fcntl(fd
, F_SETFD
, 1) == -1) {
193 if ((fd
= open_dev_crypto()) == -1)
195 if (ioctl(fd
, CRIOGET
, &retfd
) == -1)
199 if (fcntl(retfd
, F_SETFD
, 1) == -1) {
206 /* Caching version for asym operations */
208 get_asym_dev_crypto(void)
213 fd
= get_dev_crypto();
218 * Find out what ciphers /dev/crypto will let us have a session for.
219 * XXX note, that some of these openssl doesn't deal with yet!
220 * returning them here is harmless, as long as we return NULL
221 * when asked for a handler in the cryptodev_engine_ciphers routine
224 get_cryptodev_ciphers(const int **cnids
)
226 static int nids
[CRYPTO_ALGORITHM_MAX
];
227 struct session_op sess
;
228 int fd
, i
, count
= 0;
230 if ((fd
= get_dev_crypto()) < 0) {
234 memset(&sess
, 0, sizeof(sess
));
235 sess
.key
= (caddr_t
)"123456789abcdefghijklmno";
237 for (i
= 0; ciphers
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
238 if (ciphers
[i
].nid
== NID_undef
)
240 sess
.cipher
= ciphers
[i
].id
;
241 sess
.keylen
= ciphers
[i
].keylen
;
243 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
244 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
245 nids
[count
++] = ciphers
[i
].nid
;
257 * Find out what digests /dev/crypto will let us have a session for.
258 * XXX note, that some of these openssl doesn't deal with yet!
259 * returning them here is harmless, as long as we return NULL
260 * when asked for a handler in the cryptodev_engine_digests routine
263 get_cryptodev_digests(const int **cnids
)
265 static int nids
[CRYPTO_ALGORITHM_MAX
];
266 struct session_op sess
;
267 int fd
, i
, count
= 0;
269 if ((fd
= get_dev_crypto()) < 0) {
273 memset(&sess
, 0, sizeof(sess
));
274 sess
.mackey
= (caddr_t
)"123456789abcdefghijklmno";
275 for (i
= 0; digests
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
276 if (digests
[i
].nid
== NID_undef
)
278 sess
.mac
= digests
[i
].id
;
279 sess
.mackeylen
= digests
[i
].keylen
;
281 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
282 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
283 nids
[count
++] = digests
[i
].nid
;
295 * Find the useable ciphers|digests from dev/crypto - this is the first
296 * thing called by the engine init crud which determines what it
297 * can use for ciphers from this engine. We want to return
298 * only what we can do, anythine else is handled by software.
300 * If we can't initialize the device to do anything useful for
301 * any reason, we want to return a NULL array, and 0 length,
302 * which forces everything to be done is software. By putting
303 * the initalization of the device in here, we ensure we can
304 * use this engine as the default, and if for whatever reason
305 * /dev/crypto won't do what we want it will just be done in
308 * This can (should) be greatly expanded to perhaps take into
309 * account speed of the device, and what we want to do.
310 * (although the disabling of particular alg's could be controlled
311 * by the device driver with sysctl's.) - this is where we
312 * want most of the decisions made about what we actually want
313 * to use from /dev/crypto.
316 cryptodev_usable_ciphers(const int **nids
)
318 return (get_cryptodev_ciphers(nids
));
322 cryptodev_usable_digests(const int **nids
)
324 #ifdef USE_CRYPTODEV_DIGESTS
325 return (get_cryptodev_digests(nids
));
328 * XXXX just disable all digests for now, because it sucks.
329 * we need a better way to decide this - i.e. I may not
330 * want digests on slow cards like hifn on fast machines,
331 * but might want them on slow or loaded machines, etc.
332 * will also want them when using crypto cards that don't
333 * suck moose gonads - would be nice to be able to decide something
334 * as reasonable default without having hackery that's card dependent.
335 * of course, the default should probably be just do everything,
336 * with perhaps a sysctl to turn algoritms off (or have them off
337 * by default) on cards that generally suck like the hifn.
345 cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
346 const unsigned char *in
, size_t inl
)
348 struct crypt_op cryp
;
349 struct dev_crypto_state
*state
= ctx
->cipher_data
;
350 struct session_op
*sess
= &state
->d_sess
;
352 unsigned char save_iv
[EVP_MAX_IV_LENGTH
];
358 if ((inl
% ctx
->cipher
->block_size
) != 0)
361 memset(&cryp
, 0, sizeof(cryp
));
363 cryp
.ses
= sess
->ses
;
366 cryp
.src
= (caddr_t
) in
;
367 cryp
.dst
= (caddr_t
) out
;
370 cryp
.op
= ctx
->encrypt
? COP_ENCRYPT
: COP_DECRYPT
;
372 if (ctx
->cipher
->iv_len
) {
373 cryp
.iv
= (caddr_t
) ctx
->iv
;
375 iiv
= (void *) in
+ inl
- ctx
->cipher
->iv_len
;
376 memcpy(save_iv
, iiv
, ctx
->cipher
->iv_len
);
381 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) == -1) {
382 /* XXX need better errror handling
383 * this can fail for a number of different reasons.
388 if (ctx
->cipher
->iv_len
) {
390 iiv
= (void *) out
+ inl
- ctx
->cipher
->iv_len
;
393 memcpy(ctx
->iv
, iiv
, ctx
->cipher
->iv_len
);
399 cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
400 const unsigned char *iv
, int enc
)
402 struct dev_crypto_state
*state
= ctx
->cipher_data
;
403 struct session_op
*sess
= &state
->d_sess
;
406 for (i
= 0; ciphers
[i
].id
; i
++)
407 if (ctx
->cipher
->nid
== ciphers
[i
].nid
&&
408 ctx
->cipher
->iv_len
<= ciphers
[i
].ivmax
&&
409 ctx
->key_len
== ciphers
[i
].keylen
) {
410 cipher
= ciphers
[i
].id
;
414 if (!ciphers
[i
].id
) {
419 memset(sess
, 0, sizeof(struct session_op
));
421 if ((state
->d_fd
= get_dev_crypto()) < 0)
424 sess
->key
= (caddr_t
)key
;
425 sess
->keylen
= ctx
->key_len
;
426 sess
->cipher
= cipher
;
428 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) == -1) {
437 * free anything we allocated earlier when initting a
438 * session, and close the session.
441 cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
)
444 struct dev_crypto_state
*state
= ctx
->cipher_data
;
445 struct session_op
*sess
= &state
->d_sess
;
450 /* XXX if this ioctl fails, someting's wrong. the invoker
451 * may have called us with a bogus ctx, or we could
452 * have a device that for whatever reason just doesn't
453 * want to play ball - it's not clear what's right
454 * here - should this be an error? should it just
455 * increase a counter, hmm. For right now, we return
456 * 0 - I don't believe that to be "right". we could
457 * call the gorpy openssl lib error handlers that
458 * print messages to users of the library. hmm..
461 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) == -1) {
473 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
474 * gets called when libcrypto requests a cipher NID.
478 const EVP_CIPHER cryptodev_rc4
= {
481 EVP_CIPH_VARIABLE_LENGTH
,
485 sizeof(struct dev_crypto_state
),
492 const EVP_CIPHER cryptodev_des_cbc
= {
499 sizeof(struct dev_crypto_state
),
500 EVP_CIPHER_set_asn1_iv
,
501 EVP_CIPHER_get_asn1_iv
,
506 const EVP_CIPHER cryptodev_3des_cbc
= {
513 sizeof(struct dev_crypto_state
),
514 EVP_CIPHER_set_asn1_iv
,
515 EVP_CIPHER_get_asn1_iv
,
519 const EVP_CIPHER cryptodev_bf_cbc
= {
526 sizeof(struct dev_crypto_state
),
527 EVP_CIPHER_set_asn1_iv
,
528 EVP_CIPHER_get_asn1_iv
,
532 const EVP_CIPHER cryptodev_cast_cbc
= {
539 sizeof(struct dev_crypto_state
),
540 EVP_CIPHER_set_asn1_iv
,
541 EVP_CIPHER_get_asn1_iv
,
545 const EVP_CIPHER cryptodev_aes_cbc
= {
552 sizeof(struct dev_crypto_state
),
553 EVP_CIPHER_set_asn1_iv
,
554 EVP_CIPHER_get_asn1_iv
,
558 const EVP_CIPHER cryptodev_aes_192_cbc
= {
565 sizeof(struct dev_crypto_state
),
566 EVP_CIPHER_set_asn1_iv
,
567 EVP_CIPHER_get_asn1_iv
,
571 const EVP_CIPHER cryptodev_aes_256_cbc
= {
578 sizeof(struct dev_crypto_state
),
579 EVP_CIPHER_set_asn1_iv
,
580 EVP_CIPHER_get_asn1_iv
,
585 * Registered by the ENGINE when used to find out how to deal with
586 * a particular NID in the ENGINE. this says what we'll do at the
587 * top level - note, that list is restricted by what we answer with
590 cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
591 const int **nids
, int nid
)
594 return (cryptodev_usable_ciphers(nids
));
598 *cipher
= &cryptodev_rc4
;
600 case NID_des_ede3_cbc
:
601 *cipher
= &cryptodev_3des_cbc
;
604 *cipher
= &cryptodev_des_cbc
;
607 *cipher
= &cryptodev_bf_cbc
;
610 *cipher
= &cryptodev_cast_cbc
;
612 case NID_aes_128_cbc
:
613 *cipher
= &cryptodev_aes_cbc
;
615 case NID_aes_192_cbc
:
616 *cipher
= &cryptodev_aes_192_cbc
;
618 case NID_aes_256_cbc
:
619 *cipher
= &cryptodev_aes_256_cbc
;
625 return (*cipher
!= NULL
);
629 #ifdef USE_CRYPTODEV_DIGESTS
631 /* convert digest type to cryptodev */
633 digest_nid_to_cryptodev(int nid
)
637 for (i
= 0; digests
[i
].id
; i
++)
638 if (digests
[i
].nid
== nid
)
639 return (digests
[i
].id
);
645 digest_key_length(int nid
)
649 for (i
= 0; digests
[i
].id
; i
++)
650 if (digests
[i
].nid
== nid
)
651 return digests
[i
].keylen
;
656 static int cryptodev_digest_init(EVP_MD_CTX
*ctx
)
658 struct dev_crypto_state
*state
= ctx
->md_data
;
659 struct session_op
*sess
= &state
->d_sess
;
662 if ((digest
= digest_nid_to_cryptodev(ctx
->digest
->type
)) == NID_undef
){
663 printf("cryptodev_digest_init: Can't get digest \n");
667 memset(state
, 0, sizeof(struct dev_crypto_state
));
669 if ((state
->d_fd
= get_dev_crypto()) < 0) {
670 printf("cryptodev_digest_init: Can't get Dev \n");
674 sess
->mackey
= state
->dummy_mac_key
;
675 sess
->mackeylen
= digest_key_length(ctx
->digest
->type
);
678 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) < 0) {
681 printf("cryptodev_digest_init: Open session failed\n");
688 static int cryptodev_digest_update(EVP_MD_CTX
*ctx
, const void *data
,
691 struct crypt_op cryp
;
692 struct dev_crypto_state
*state
= ctx
->md_data
;
693 struct session_op
*sess
= &state
->d_sess
;
695 if (!data
|| state
->d_fd
< 0) {
696 printf("cryptodev_digest_update: illegal inputs \n");
704 if (!(ctx
->flags
& EVP_MD_CTX_FLAG_ONESHOT
)) {
705 /* if application doesn't support one buffer */
706 state
->mac_data
= OPENSSL_realloc(state
->mac_data
, state
->mac_len
+ count
);
708 if (!state
->mac_data
) {
709 printf("cryptodev_digest_update: realloc failed\n");
713 memcpy(state
->mac_data
+ state
->mac_len
, data
, count
);
714 state
->mac_len
+= count
;
719 memset(&cryp
, 0, sizeof(cryp
));
721 cryp
.ses
= sess
->ses
;
724 cryp
.src
= (caddr_t
) data
;
726 cryp
.mac
= (caddr_t
) state
->digest_res
;
727 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) < 0) {
728 printf("cryptodev_digest_update: digest failed\n");
735 static int cryptodev_digest_final(EVP_MD_CTX
*ctx
, unsigned char *md
)
737 struct crypt_op cryp
;
738 struct dev_crypto_state
*state
= ctx
->md_data
;
739 struct session_op
*sess
= &state
->d_sess
;
743 if (!md
|| state
->d_fd
< 0) {
744 printf("cryptodev_digest_final: illegal input\n");
748 if (! (ctx
->flags
& EVP_MD_CTX_FLAG_ONESHOT
) ) {
749 /* if application doesn't support one buffer */
750 memset(&cryp
, 0, sizeof(cryp
));
752 cryp
.ses
= sess
->ses
;
754 cryp
.len
= state
->mac_len
;
755 cryp
.src
= state
->mac_data
;
757 cryp
.mac
= (caddr_t
)md
;
759 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) < 0) {
760 printf("cryptodev_digest_final: digest failed\n");
767 memcpy(md
, state
->digest_res
, ctx
->digest
->md_size
);
773 static int cryptodev_digest_cleanup(EVP_MD_CTX
*ctx
)
776 struct dev_crypto_state
*state
= ctx
->md_data
;
777 struct session_op
*sess
= &state
->d_sess
;
779 if (state
->d_fd
< 0) {
780 printf("cryptodev_digest_cleanup: illegal input\n");
784 if (state
->mac_data
) {
785 OPENSSL_free(state
->mac_data
);
786 state
->mac_data
= NULL
;
793 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) < 0) {
794 printf("cryptodev_digest_cleanup: failed to close session\n");
805 static int cryptodev_digest_copy(EVP_MD_CTX
*to
,const EVP_MD_CTX
*from
)
807 struct dev_crypto_state
*fstate
= from
->md_data
;
808 struct dev_crypto_state
*dstate
= to
->md_data
;
810 memcpy(dstate
, fstate
, sizeof(struct dev_crypto_state
));
812 if (fstate
->mac_len
!= 0) {
813 dstate
->mac_data
= OPENSSL_malloc(fstate
->mac_len
);
814 memcpy(dstate
->mac_data
, fstate
->mac_data
, fstate
->mac_len
);
823 const EVP_MD cryptodev_sha1
= {
828 cryptodev_digest_init
,
829 cryptodev_digest_update
,
830 cryptodev_digest_final
,
831 cryptodev_digest_copy
,
832 cryptodev_digest_cleanup
,
833 EVP_PKEY_NULL_method
,
835 sizeof(struct dev_crypto_state
),
838 const EVP_MD cryptodev_md5
= {
841 16 /* MD5_DIGEST_LENGTH */,
843 cryptodev_digest_init
,
844 cryptodev_digest_update
,
845 cryptodev_digest_final
,
846 cryptodev_digest_copy
,
847 cryptodev_digest_cleanup
,
848 EVP_PKEY_NULL_method
,
850 sizeof(struct dev_crypto_state
),
853 #endif /* USE_CRYPTODEV_DIGESTS */
857 cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
858 const int **nids
, int nid
)
861 return (cryptodev_usable_digests(nids
));
864 #ifdef USE_CRYPTODEV_DIGESTS
866 *digest
= &cryptodev_md5
;
869 *digest
= &cryptodev_sha1
;
872 #endif /* USE_CRYPTODEV_DIGESTS */
876 return (*digest
!= NULL
);
880 * Convert a BIGNUM to the representation that /dev/crypto needs.
881 * Upon completion of use, the caller is responsible for freeing
885 bn2crparam(const BIGNUM
*a
, struct crparam
*crp
)
894 bits
= BN_num_bits(a
);
895 bytes
= (bits
+ 7) / 8;
902 crp
->crp_p
= (caddr_t
) b
;
903 crp
->crp_nbits
= bits
;
905 for (i
= 0, j
= 0; i
< a
->top
; i
++) {
906 for (k
= 0; k
< BN_BITS2
/ 8; k
++) {
907 if ((j
+ k
) >= bytes
)
909 b
[j
+ k
] = a
->d
[i
] >> (k
* 8);
916 /* Convert a /dev/crypto parameter to a BIGNUM */
918 crparam2bn(struct crparam
*crp
, BIGNUM
*a
)
923 bytes
= (crp
->crp_nbits
+ 7) / 8;
928 if ((pd
= (u_int8_t
*) malloc(bytes
)) == NULL
)
931 for (i
= 0; i
< bytes
; i
++)
932 pd
[i
] = crp
->crp_p
[bytes
- i
- 1];
934 BN_bin2bn(pd
, bytes
, a
);
941 zapparams(struct crypt_kop
*kop
)
945 for (i
= 0; i
< kop
->crk_iparams
+ kop
->crk_oparams
; i
++) {
946 if (kop
->crk_param
[i
].crp_p
)
947 free(kop
->crk_param
[i
].crp_p
);
948 kop
->crk_param
[i
].crp_p
= NULL
;
949 kop
->crk_param
[i
].crp_nbits
= 0;
954 cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
, int slen
, BIGNUM
*s
)
958 if ((fd
= get_asym_dev_crypto()) < 0)
962 kop
->crk_param
[kop
->crk_iparams
].crp_p
= calloc(rlen
, sizeof(char));
963 kop
->crk_param
[kop
->crk_iparams
].crp_nbits
= rlen
* 8;
967 kop
->crk_param
[kop
->crk_iparams
+1].crp_p
= calloc(slen
, sizeof(char));
968 kop
->crk_param
[kop
->crk_iparams
+1].crp_nbits
= slen
* 8;
972 if (ioctl(fd
, CIOCKEY
, kop
) == 0) {
974 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
], r
);
976 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
+1], s
);
984 cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
, const BIGNUM
*p
,
985 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*in_mont
)
987 struct crypt_kop kop
;
990 /* Currently, we know we can do mod exp iff we can do any
991 * asymmetric operations at all.
993 if (cryptodev_asymfeat
== 0) {
994 ret
= BN_mod_exp(r
, a
, p
, m
, ctx
);
998 memset(&kop
, 0, sizeof kop
);
999 kop
.crk_op
= CRK_MOD_EXP
;
1001 /* inputs: a^p % m */
1002 if (bn2crparam(a
, &kop
.crk_param
[0]))
1004 if (bn2crparam(p
, &kop
.crk_param
[1]))
1006 if (bn2crparam(m
, &kop
.crk_param
[2]))
1008 kop
.crk_iparams
= 3;
1010 if (cryptodev_asym(&kop
, BN_num_bytes(m
), r
, 0, NULL
) == -1) {
1011 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1012 ret
= meth
->bn_mod_exp(r
, a
, p
, m
, ctx
, in_mont
);
1020 cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
)
1024 r
= cryptodev_bn_mod_exp(r0
, I
, rsa
->d
, rsa
->n
, ctx
, NULL
);
1030 cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
)
1032 struct crypt_kop kop
;
1035 if (!rsa
->p
|| !rsa
->q
|| !rsa
->dmp1
|| !rsa
->dmq1
|| !rsa
->iqmp
) {
1036 /* XXX 0 means failure?? */
1040 memset(&kop
, 0, sizeof kop
);
1041 kop
.crk_op
= CRK_MOD_EXP_CRT
;
1042 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
1043 if (bn2crparam(rsa
->p
, &kop
.crk_param
[0]))
1045 if (bn2crparam(rsa
->q
, &kop
.crk_param
[1]))
1047 if (bn2crparam(I
, &kop
.crk_param
[2]))
1049 if (bn2crparam(rsa
->dmp1
, &kop
.crk_param
[3]))
1051 if (bn2crparam(rsa
->dmq1
, &kop
.crk_param
[4]))
1053 if (bn2crparam(rsa
->iqmp
, &kop
.crk_param
[5]))
1055 kop
.crk_iparams
= 6;
1057 if (cryptodev_asym(&kop
, BN_num_bytes(rsa
->n
), r0
, 0, NULL
) == -1) {
1058 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
1059 ret
= (*meth
->rsa_mod_exp
)(r0
, I
, rsa
, ctx
);
1066 static RSA_METHOD cryptodev_rsa
= {
1067 "cryptodev RSA method",
1068 NULL
, /* rsa_pub_enc */
1069 NULL
, /* rsa_pub_dec */
1070 NULL
, /* rsa_priv_enc */
1071 NULL
, /* rsa_priv_dec */
1077 NULL
, /* app_data */
1078 NULL
, /* rsa_sign */
1079 NULL
/* rsa_verify */
1083 cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
, const BIGNUM
*p
,
1084 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
)
1086 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
1090 cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
1091 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
, BIGNUM
*p
,
1092 BN_CTX
*ctx
, BN_MONT_CTX
*mont
)
1099 /* v = ( g^u1 * y^u2 mod p ) mod q */
1100 /* let t1 = g ^ u1 mod p */
1103 if (!dsa
->meth
->bn_mod_exp(dsa
,t1
,dsa
->g
,u1
,dsa
->p
,ctx
,mont
))
1106 /* let t2 = y ^ u2 mod p */
1107 if (!dsa
->meth
->bn_mod_exp(dsa
,&t2
,dsa
->pub_key
,u2
,dsa
->p
,ctx
,mont
))
1109 /* let u1 = t1 * t2 mod p */
1110 if (!BN_mod_mul(u1
,t1
,&t2
,dsa
->p
,ctx
))
1122 cryptodev_dsa_do_sign(const unsigned char *dgst
, int dlen
, DSA
*dsa
)
1124 struct crypt_kop kop
;
1125 BIGNUM
*r
= NULL
, *s
= NULL
;
1126 DSA_SIG
*dsaret
= NULL
;
1128 if ((r
= BN_new()) == NULL
)
1130 if ((s
= BN_new()) == NULL
) {
1135 memset(&kop
, 0, sizeof kop
);
1136 kop
.crk_op
= CRK_DSA_SIGN
;
1138 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
1139 kop
.crk_param
[0].crp_p
= (caddr_t
)dgst
;
1140 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
1141 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
1143 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
1145 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
1147 if (bn2crparam(dsa
->priv_key
, &kop
.crk_param
[4]))
1149 kop
.crk_iparams
= 5;
1151 if (cryptodev_asym(&kop
, BN_num_bytes(dsa
->q
), r
,
1152 BN_num_bytes(dsa
->q
), s
) == 0) {
1153 dsaret
= DSA_SIG_new();
1157 const DSA_METHOD
*meth
= DSA_OpenSSL();
1160 dsaret
= (meth
->dsa_do_sign
)(dgst
, dlen
, dsa
);
1163 kop
.crk_param
[0].crp_p
= NULL
;
1169 cryptodev_dsa_verify(const unsigned char *dgst
, int dlen
,
1170 DSA_SIG
*sig
, DSA
*dsa
)
1172 struct crypt_kop kop
;
1175 memset(&kop
, 0, sizeof kop
);
1176 kop
.crk_op
= CRK_DSA_VERIFY
;
1178 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
1179 kop
.crk_param
[0].crp_p
= (caddr_t
)dgst
;
1180 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
1181 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
1183 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
1185 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
1187 if (bn2crparam(dsa
->pub_key
, &kop
.crk_param
[4]))
1189 if (bn2crparam(sig
->r
, &kop
.crk_param
[5]))
1191 if (bn2crparam(sig
->s
, &kop
.crk_param
[6]))
1193 kop
.crk_iparams
= 7;
1195 if (cryptodev_asym(&kop
, 0, NULL
, 0, NULL
) == 0) {
1196 dsaret
= kop
.crk_status
;
1198 const DSA_METHOD
*meth
= DSA_OpenSSL();
1200 dsaret
= (meth
->dsa_do_verify
)(dgst
, dlen
, sig
, dsa
);
1203 kop
.crk_param
[0].crp_p
= NULL
;
1208 static DSA_METHOD cryptodev_dsa
= {
1209 "cryptodev DSA method",
1211 NULL
, /* dsa_sign_setup */
1213 NULL
, /* dsa_mod_exp */
1222 cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
1223 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
1226 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
1230 cryptodev_dh_compute_key(unsigned char *key
, const BIGNUM
*pub_key
, DH
*dh
)
1232 struct crypt_kop kop
;
1236 if ((fd
= get_asym_dev_crypto()) < 0) {
1237 const DH_METHOD
*meth
= DH_OpenSSL();
1239 return ((meth
->compute_key
)(key
, pub_key
, dh
));
1242 keylen
= BN_num_bits(dh
->p
);
1244 memset(&kop
, 0, sizeof kop
);
1245 kop
.crk_op
= CRK_DH_COMPUTE_KEY
;
1247 /* inputs: dh->priv_key pub_key dh->p key */
1248 if (bn2crparam(dh
->priv_key
, &kop
.crk_param
[0]))
1250 if (bn2crparam(pub_key
, &kop
.crk_param
[1]))
1252 if (bn2crparam(dh
->p
, &kop
.crk_param
[2]))
1254 kop
.crk_iparams
= 3;
1256 kop
.crk_param
[3].crp_p
= (caddr_t
) key
;
1257 kop
.crk_param
[3].crp_nbits
= keylen
* 8;
1258 kop
.crk_oparams
= 1;
1260 if (ioctl(fd
, CIOCKEY
, &kop
) == -1) {
1261 const DH_METHOD
*meth
= DH_OpenSSL();
1263 dhret
= (meth
->compute_key
)(key
, pub_key
, dh
);
1266 kop
.crk_param
[3].crp_p
= NULL
;
1271 static DH_METHOD cryptodev_dh
= {
1272 "cryptodev DH method",
1273 NULL
, /* cryptodev_dh_generate_key */
1283 * ctrl right now is just a wrapper that doesn't do much
1284 * but I expect we'll want some options soon.
1287 cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
, void (*f
)())
1289 #ifdef HAVE_SYSLOG_R
1290 struct syslog_data sd
= SYSLOG_DATA_INIT
;
1295 #ifdef HAVE_SYSLOG_R
1296 syslog_r(LOG_ERR
, &sd
,
1297 "cryptodev_ctrl: unknown command %d", cmd
);
1299 syslog(LOG_ERR
, "cryptodev_ctrl: unknown command %d", cmd
);
1307 ENGINE_load_cryptodev(void)
1309 ENGINE
*engine
= ENGINE_new();
1314 if ((fd
= get_dev_crypto()) < 0) {
1315 ENGINE_free(engine
);
1320 * find out what asymmetric crypto algorithms we support
1322 if (ioctl(fd
, CIOCASYMFEAT
, &cryptodev_asymfeat
) == -1) {
1324 ENGINE_free(engine
);
1329 if (!ENGINE_set_id(engine
, "cryptodev") ||
1330 !ENGINE_set_name(engine
, "BSD cryptodev engine") ||
1331 !ENGINE_set_ciphers(engine
, cryptodev_engine_ciphers
) ||
1332 !ENGINE_set_digests(engine
, cryptodev_engine_digests
) ||
1333 !ENGINE_set_ctrl_function(engine
, cryptodev_ctrl
) ||
1334 !ENGINE_set_cmd_defns(engine
, cryptodev_defns
)) {
1335 ENGINE_free(engine
);
1339 if (ENGINE_set_RSA(engine
, &cryptodev_rsa
)) {
1340 const RSA_METHOD
*rsa_meth
= RSA_PKCS1_SSLeay();
1342 cryptodev_rsa
.bn_mod_exp
= rsa_meth
->bn_mod_exp
;
1343 cryptodev_rsa
.rsa_mod_exp
= rsa_meth
->rsa_mod_exp
;
1344 cryptodev_rsa
.rsa_pub_enc
= rsa_meth
->rsa_pub_enc
;
1345 cryptodev_rsa
.rsa_pub_dec
= rsa_meth
->rsa_pub_dec
;
1346 cryptodev_rsa
.rsa_priv_enc
= rsa_meth
->rsa_priv_enc
;
1347 cryptodev_rsa
.rsa_priv_dec
= rsa_meth
->rsa_priv_dec
;
1348 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1349 cryptodev_rsa
.bn_mod_exp
= cryptodev_bn_mod_exp
;
1350 if (cryptodev_asymfeat
& CRF_MOD_EXP_CRT
)
1351 cryptodev_rsa
.rsa_mod_exp
=
1352 cryptodev_rsa_mod_exp
;
1354 cryptodev_rsa
.rsa_mod_exp
=
1355 cryptodev_rsa_nocrt_mod_exp
;
1359 if (ENGINE_set_DSA(engine
, &cryptodev_dsa
)) {
1360 const DSA_METHOD
*meth
= DSA_OpenSSL();
1362 memcpy(&cryptodev_dsa
, meth
, sizeof(DSA_METHOD
));
1363 if (cryptodev_asymfeat
& CRF_DSA_SIGN
)
1364 cryptodev_dsa
.dsa_do_sign
= cryptodev_dsa_do_sign
;
1365 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1366 cryptodev_dsa
.bn_mod_exp
= cryptodev_dsa_bn_mod_exp
;
1367 cryptodev_dsa
.dsa_mod_exp
= cryptodev_dsa_dsa_mod_exp
;
1369 if (cryptodev_asymfeat
& CRF_DSA_VERIFY
)
1370 cryptodev_dsa
.dsa_do_verify
= cryptodev_dsa_verify
;
1373 if (ENGINE_set_DH(engine
, &cryptodev_dh
)){
1374 const DH_METHOD
*dh_meth
= DH_OpenSSL();
1376 cryptodev_dh
.generate_key
= dh_meth
->generate_key
;
1377 cryptodev_dh
.compute_key
= dh_meth
->compute_key
;
1378 cryptodev_dh
.bn_mod_exp
= dh_meth
->bn_mod_exp
;
1379 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1380 cryptodev_dh
.bn_mod_exp
= cryptodev_mod_exp_dh
;
1381 if (cryptodev_asymfeat
& CRF_DH_COMPUTE_KEY
)
1382 cryptodev_dh
.compute_key
=
1383 cryptodev_dh_compute_key
;
1388 ENGINE_free(engine
);
1392 #endif /* HAVE_CRYPTODEV */