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_version))
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
;
73 static u_int32_t cryptodev_asymfeat
= 0;
75 static int get_asym_dev_crypto(void);
76 static int open_dev_crypto(void);
77 static int get_dev_crypto(void);
78 static int cryptodev_max_iv(int cipher
);
79 static int cryptodev_key_length_valid(int cipher
, int len
);
80 static int cipher_nid_to_cryptodev(int nid
);
81 static int get_cryptodev_ciphers(const int **cnids
);
82 static int get_cryptodev_digests(const int **cnids
);
83 static int cryptodev_usable_ciphers(const int **nids
);
84 static int cryptodev_usable_digests(const int **nids
);
85 static int cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
86 const unsigned char *in
, unsigned int inl
);
87 static int cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
88 const unsigned char *iv
, int enc
);
89 static int cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
);
90 static int cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
91 const int **nids
, int nid
);
92 static int cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
93 const int **nids
, int nid
);
94 static int bn2crparam(const BIGNUM
*a
, struct crparam
*crp
);
95 static int crparam2bn(struct crparam
*crp
, BIGNUM
*a
);
96 static void zapparams(struct crypt_kop
*kop
);
97 static int cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
,
100 static int cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
,
101 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
);
102 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
,
104 static int cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
);
105 static int cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
,
106 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
);
107 static int cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
108 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
, BIGNUM
*p
,
109 BN_CTX
*ctx
, BN_MONT_CTX
*mont
);
110 static DSA_SIG
*cryptodev_dsa_do_sign(const unsigned char *dgst
,
112 static int cryptodev_dsa_verify(const unsigned char *dgst
, int dgst_len
,
113 DSA_SIG
*sig
, DSA
*dsa
);
114 static int cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
115 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
117 static int cryptodev_dh_compute_key(unsigned char *key
,
118 const BIGNUM
*pub_key
, DH
*dh
);
119 static int cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
,
121 void ENGINE_load_cryptodev(void);
123 static const ENGINE_CMD_DEFN cryptodev_defns
[] = {
133 { CRYPTO_DES_CBC
, NID_des_cbc
, 8, 8, },
134 { CRYPTO_3DES_CBC
, NID_des_ede3_cbc
, 8, 24, },
135 { CRYPTO_AES_CBC
, NID_aes_128_cbc
, 16, 16, },
136 { CRYPTO_BLF_CBC
, NID_bf_cbc
, 8, 16, },
137 { CRYPTO_CAST_CBC
, NID_cast5_cbc
, 8, 16, },
138 { CRYPTO_SKIPJACK_CBC
, NID_undef
, 0, 0, },
139 { 0, NID_undef
, 0, 0, },
146 { CRYPTO_SHA1_HMAC
, NID_hmacWithSHA1
, },
147 { CRYPTO_RIPEMD160_HMAC
, NID_ripemd160
, },
148 { CRYPTO_MD5_KPDK
, NID_undef
, },
149 { CRYPTO_SHA1_KPDK
, NID_undef
, },
150 { CRYPTO_MD5
, NID_md5
, },
151 { CRYPTO_SHA1
, NID_undef
, },
156 * Return a fd if /dev/crypto seems usable, 0 otherwise.
159 open_dev_crypto(void)
164 if ((fd
= open("/dev/crypto", O_RDWR
, 0)) == -1)
167 if (fcntl(fd
, F_SETFD
, 1) == -1) {
181 if ((fd
= open_dev_crypto()) == -1)
183 if (ioctl(fd
, CRIOGET
, &retfd
) == -1)
187 if (fcntl(retfd
, F_SETFD
, 1) == -1) {
194 /* Caching version for asym operations */
196 get_asym_dev_crypto(void)
201 fd
= get_dev_crypto();
206 * XXXX this needs to be set for each alg - and determined from
210 cryptodev_max_iv(int cipher
)
214 for (i
= 0; ciphers
[i
].id
; i
++)
215 if (ciphers
[i
].id
== cipher
)
216 return (ciphers
[i
].ivmax
);
221 * XXXX this needs to be set for each alg - and determined from
222 * a running card. For now, fake it out - but most of these
223 * for real devices should return 1 for the supported key
224 * sizes the device can handle.
227 cryptodev_key_length_valid(int cipher
, int len
)
231 for (i
= 0; ciphers
[i
].id
; i
++)
232 if (ciphers
[i
].id
== cipher
)
233 return (ciphers
[i
].keylen
== len
);
237 /* convert libcrypto nids to cryptodev */
239 cipher_nid_to_cryptodev(int nid
)
243 for (i
= 0; ciphers
[i
].id
; i
++)
244 if (ciphers
[i
].nid
== nid
)
245 return (ciphers
[i
].id
);
250 * Find out what ciphers /dev/crypto will let us have a session for.
251 * XXX note, that some of these openssl doesn't deal with yet!
252 * returning them here is harmless, as long as we return NULL
253 * when asked for a handler in the cryptodev_engine_ciphers routine
256 get_cryptodev_ciphers(const int **cnids
)
258 static int nids
[CRYPTO_ALGORITHM_MAX
];
259 struct session_op sess
;
260 int fd
, i
, count
= 0;
262 if ((fd
= get_dev_crypto()) < 0) {
266 memset(&sess
, 0, sizeof(sess
));
267 sess
.key
= (caddr_t
)"123456789abcdefghijklmno";
269 for (i
= 0; ciphers
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
270 if (ciphers
[i
].nid
== NID_undef
)
272 sess
.cipher
= ciphers
[i
].id
;
273 sess
.keylen
= ciphers
[i
].keylen
;
275 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
276 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
277 nids
[count
++] = ciphers
[i
].nid
;
289 * Find out what digests /dev/crypto will let us have a session for.
290 * XXX note, that some of these openssl doesn't deal with yet!
291 * returning them here is harmless, as long as we return NULL
292 * when asked for a handler in the cryptodev_engine_digests routine
295 get_cryptodev_digests(const int **cnids
)
297 static int nids
[CRYPTO_ALGORITHM_MAX
];
298 struct session_op sess
;
299 int fd
, i
, count
= 0;
301 if ((fd
= get_dev_crypto()) < 0) {
305 memset(&sess
, 0, sizeof(sess
));
306 for (i
= 0; digests
[i
].id
&& count
< CRYPTO_ALGORITHM_MAX
; i
++) {
307 if (digests
[i
].nid
== NID_undef
)
309 sess
.mac
= digests
[i
].id
;
311 if (ioctl(fd
, CIOCGSESSION
, &sess
) != -1 &&
312 ioctl(fd
, CIOCFSESSION
, &sess
.ses
) != -1)
313 nids
[count
++] = digests
[i
].nid
;
325 * Find the useable ciphers|digests from dev/crypto - this is the first
326 * thing called by the engine init crud which determines what it
327 * can use for ciphers from this engine. We want to return
328 * only what we can do, anythine else is handled by software.
330 * If we can't initialize the device to do anything useful for
331 * any reason, we want to return a NULL array, and 0 length,
332 * which forces everything to be done is software. By putting
333 * the initalization of the device in here, we ensure we can
334 * use this engine as the default, and if for whatever reason
335 * /dev/crypto won't do what we want it will just be done in
338 * This can (should) be greatly expanded to perhaps take into
339 * account speed of the device, and what we want to do.
340 * (although the disabling of particular alg's could be controlled
341 * by the device driver with sysctl's.) - this is where we
342 * want most of the decisions made about what we actually want
343 * to use from /dev/crypto.
346 cryptodev_usable_ciphers(const int **nids
)
348 return (get_cryptodev_ciphers(nids
));
352 cryptodev_usable_digests(const int **nids
)
355 * XXXX just disable all digests for now, because it sucks.
356 * we need a better way to decide this - i.e. I may not
357 * want digests on slow cards like hifn on fast machines,
358 * but might want them on slow or loaded machines, etc.
359 * will also want them when using crypto cards that don't
360 * suck moose gonads - would be nice to be able to decide something
361 * as reasonable default without having hackery that's card dependent.
362 * of course, the default should probably be just do everything,
363 * with perhaps a sysctl to turn algoritms off (or have them off
364 * by default) on cards that generally suck like the hifn.
371 cryptodev_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
372 const unsigned char *in
, unsigned int inl
)
374 struct crypt_op cryp
;
375 struct dev_crypto_state
*state
= ctx
->cipher_data
;
376 struct session_op
*sess
= &state
->d_sess
;
378 unsigned char save_iv
[EVP_MAX_IV_LENGTH
];
384 if ((inl
% ctx
->cipher
->block_size
) != 0)
387 memset(&cryp
, 0, sizeof(cryp
));
389 cryp
.ses
= sess
->ses
;
392 cryp
.src
= (caddr_t
) in
;
393 cryp
.dst
= (caddr_t
) out
;
396 cryp
.op
= ctx
->encrypt
? COP_ENCRYPT
: COP_DECRYPT
;
398 if (ctx
->cipher
->iv_len
) {
399 cryp
.iv
= (caddr_t
) ctx
->iv
;
401 iiv
= (void *) in
+ inl
- ctx
->cipher
->iv_len
;
402 memcpy(save_iv
, iiv
, ctx
->cipher
->iv_len
);
407 if (ioctl(state
->d_fd
, CIOCCRYPT
, &cryp
) == -1) {
408 /* XXX need better errror handling
409 * this can fail for a number of different reasons.
414 if (ctx
->cipher
->iv_len
) {
416 iiv
= (void *) out
+ inl
- ctx
->cipher
->iv_len
;
419 memcpy(ctx
->iv
, iiv
, ctx
->cipher
->iv_len
);
425 cryptodev_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
426 const unsigned char *iv
, int enc
)
428 struct dev_crypto_state
*state
= ctx
->cipher_data
;
429 struct session_op
*sess
= &state
->d_sess
;
432 if ((cipher
= cipher_nid_to_cryptodev(ctx
->cipher
->nid
)) == NID_undef
)
435 if (ctx
->cipher
->iv_len
> cryptodev_max_iv(cipher
))
438 if (!cryptodev_key_length_valid(cipher
, ctx
->key_len
))
441 memset(sess
, 0, sizeof(struct session_op
));
443 if ((state
->d_fd
= get_dev_crypto()) < 0)
446 sess
->key
= (unsigned char *)key
;
447 sess
->keylen
= ctx
->key_len
;
448 sess
->cipher
= cipher
;
450 if (ioctl(state
->d_fd
, CIOCGSESSION
, sess
) == -1) {
459 * free anything we allocated earlier when initting a
460 * session, and close the session.
463 cryptodev_cleanup(EVP_CIPHER_CTX
*ctx
)
466 struct dev_crypto_state
*state
= ctx
->cipher_data
;
467 struct session_op
*sess
= &state
->d_sess
;
472 /* XXX if this ioctl fails, someting's wrong. the invoker
473 * may have called us with a bogus ctx, or we could
474 * have a device that for whatever reason just doesn't
475 * want to play ball - it's not clear what's right
476 * here - should this be an error? should it just
477 * increase a counter, hmm. For right now, we return
478 * 0 - I don't believe that to be "right". we could
479 * call the gorpy openssl lib error handlers that
480 * print messages to users of the library. hmm..
483 if (ioctl(state
->d_fd
, CIOCFSESSION
, &sess
->ses
) == -1) {
495 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
496 * gets called when libcrypto requests a cipher NID.
500 const EVP_CIPHER cryptodev_des_cbc
= {
507 sizeof(struct dev_crypto_state
),
508 EVP_CIPHER_set_asn1_iv
,
509 EVP_CIPHER_get_asn1_iv
,
514 const EVP_CIPHER cryptodev_3des_cbc
= {
521 sizeof(struct dev_crypto_state
),
522 EVP_CIPHER_set_asn1_iv
,
523 EVP_CIPHER_get_asn1_iv
,
527 const EVP_CIPHER cryptodev_bf_cbc
= {
534 sizeof(struct dev_crypto_state
),
535 EVP_CIPHER_set_asn1_iv
,
536 EVP_CIPHER_get_asn1_iv
,
540 const EVP_CIPHER cryptodev_cast_cbc
= {
547 sizeof(struct dev_crypto_state
),
548 EVP_CIPHER_set_asn1_iv
,
549 EVP_CIPHER_get_asn1_iv
,
553 const EVP_CIPHER cryptodev_aes_cbc
= {
560 sizeof(struct dev_crypto_state
),
561 EVP_CIPHER_set_asn1_iv
,
562 EVP_CIPHER_get_asn1_iv
,
567 * Registered by the ENGINE when used to find out how to deal with
568 * a particular NID in the ENGINE. this says what we'll do at the
569 * top level - note, that list is restricted by what we answer with
572 cryptodev_engine_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
573 const int **nids
, int nid
)
576 return (cryptodev_usable_ciphers(nids
));
579 case NID_des_ede3_cbc
:
580 *cipher
= &cryptodev_3des_cbc
;
583 *cipher
= &cryptodev_des_cbc
;
586 *cipher
= &cryptodev_bf_cbc
;
589 *cipher
= &cryptodev_cast_cbc
;
591 case NID_aes_128_cbc
:
592 *cipher
= &cryptodev_aes_cbc
;
598 return (*cipher
!= NULL
);
602 cryptodev_engine_digests(ENGINE
*e
, const EVP_MD
**digest
,
603 const int **nids
, int nid
)
606 return (cryptodev_usable_digests(nids
));
610 *digest
= NULL
; /* need to make a clean md5 critter */
616 return (*digest
!= NULL
);
620 * Convert a BIGNUM to the representation that /dev/crypto needs.
621 * Upon completion of use, the caller is responsible for freeing
625 bn2crparam(const BIGNUM
*a
, struct crparam
*crp
)
628 ssize_t words
, bytes
, bits
;
634 bits
= BN_num_bits(a
);
635 bytes
= (bits
+ 7) / 8;
642 crp
->crp_nbits
= bits
;
644 for (i
= 0, j
= 0; i
< a
->top
; i
++) {
645 for (k
= 0; k
< BN_BITS2
/ 8; k
++) {
646 if ((j
+ k
) >= bytes
)
648 b
[j
+ k
] = a
->d
[i
] >> (k
* 8);
655 /* Convert a /dev/crypto parameter to a BIGNUM */
657 crparam2bn(struct crparam
*crp
, BIGNUM
*a
)
662 bytes
= (crp
->crp_nbits
+ 7) / 8;
667 if ((pd
= (u_int8_t
*) malloc(bytes
)) == NULL
)
670 for (i
= 0; i
< bytes
; i
++)
671 pd
[i
] = crp
->crp_p
[bytes
- i
- 1];
673 BN_bin2bn(pd
, bytes
, a
);
680 zapparams(struct crypt_kop
*kop
)
684 for (i
= 0; i
< kop
->crk_iparams
+ kop
->crk_oparams
; i
++) {
685 if (kop
->crk_param
[i
].crp_p
)
686 free(kop
->crk_param
[i
].crp_p
);
687 kop
->crk_param
[i
].crp_p
= NULL
;
688 kop
->crk_param
[i
].crp_nbits
= 0;
693 cryptodev_asym(struct crypt_kop
*kop
, int rlen
, BIGNUM
*r
, int slen
, BIGNUM
*s
)
697 if ((fd
= get_asym_dev_crypto()) < 0)
701 kop
->crk_param
[kop
->crk_iparams
].crp_p
= calloc(rlen
, sizeof(char));
702 kop
->crk_param
[kop
->crk_iparams
].crp_nbits
= rlen
* 8;
706 kop
->crk_param
[kop
->crk_iparams
+1].crp_p
= calloc(slen
, sizeof(char));
707 kop
->crk_param
[kop
->crk_iparams
+1].crp_nbits
= slen
* 8;
711 if (ioctl(fd
, CIOCKEY
, kop
) == 0) {
713 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
], r
);
715 crparam2bn(&kop
->crk_param
[kop
->crk_iparams
+1], s
);
723 cryptodev_bn_mod_exp(BIGNUM
*r
, const BIGNUM
*a
, const BIGNUM
*p
,
724 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*in_mont
)
726 struct crypt_kop kop
;
729 /* Currently, we know we can do mod exp iff we can do any
730 * asymmetric operations at all.
732 if (cryptodev_asymfeat
== 0) {
733 ret
= BN_mod_exp(r
, a
, p
, m
, ctx
);
737 memset(&kop
, 0, sizeof kop
);
738 kop
.crk_op
= CRK_MOD_EXP
;
740 /* inputs: a^p % m */
741 if (bn2crparam(a
, &kop
.crk_param
[0]))
743 if (bn2crparam(p
, &kop
.crk_param
[1]))
745 if (bn2crparam(m
, &kop
.crk_param
[2]))
749 if (cryptodev_asym(&kop
, BN_num_bytes(m
), r
, 0, NULL
) == -1) {
750 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
751 ret
= meth
->bn_mod_exp(r
, a
, p
, m
, ctx
, in_mont
);
759 cryptodev_rsa_nocrt_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
)
765 r
= cryptodev_bn_mod_exp(r0
, I
, rsa
->d
, rsa
->n
, ctx
, NULL
);
771 cryptodev_rsa_mod_exp(BIGNUM
*r0
, const BIGNUM
*I
, RSA
*rsa
, BN_CTX
*ctx
)
773 struct crypt_kop kop
;
776 if (!rsa
->p
|| !rsa
->q
|| !rsa
->dmp1
|| !rsa
->dmq1
|| !rsa
->iqmp
) {
777 /* XXX 0 means failure?? */
781 memset(&kop
, 0, sizeof kop
);
782 kop
.crk_op
= CRK_MOD_EXP_CRT
;
783 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
784 if (bn2crparam(rsa
->p
, &kop
.crk_param
[0]))
786 if (bn2crparam(rsa
->q
, &kop
.crk_param
[1]))
788 if (bn2crparam(I
, &kop
.crk_param
[2]))
790 if (bn2crparam(rsa
->dmp1
, &kop
.crk_param
[3]))
792 if (bn2crparam(rsa
->dmq1
, &kop
.crk_param
[4]))
794 if (bn2crparam(rsa
->iqmp
, &kop
.crk_param
[5]))
798 if (cryptodev_asym(&kop
, BN_num_bytes(rsa
->n
), r0
, 0, NULL
) == -1) {
799 const RSA_METHOD
*meth
= RSA_PKCS1_SSLeay();
800 ret
= (*meth
->rsa_mod_exp
)(r0
, I
, rsa
, ctx
);
807 static RSA_METHOD cryptodev_rsa
= {
808 "cryptodev RSA method",
809 NULL
, /* rsa_pub_enc */
810 NULL
, /* rsa_pub_dec */
811 NULL
, /* rsa_priv_enc */
812 NULL
, /* rsa_priv_dec */
820 NULL
/* rsa_verify */
824 cryptodev_dsa_bn_mod_exp(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
, const BIGNUM
*p
,
825 const BIGNUM
*m
, BN_CTX
*ctx
, BN_MONT_CTX
*m_ctx
)
827 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
831 cryptodev_dsa_dsa_mod_exp(DSA
*dsa
, BIGNUM
*t1
, BIGNUM
*g
,
832 BIGNUM
*u1
, BIGNUM
*pub_key
, BIGNUM
*u2
, BIGNUM
*p
,
833 BN_CTX
*ctx
, BN_MONT_CTX
*mont
)
840 /* v = ( g^u1 * y^u2 mod p ) mod q */
841 /* let t1 = g ^ u1 mod p */
844 if (!dsa
->meth
->bn_mod_exp(dsa
,t1
,dsa
->g
,u1
,dsa
->p
,ctx
,mont
))
847 /* let t2 = y ^ u2 mod p */
848 if (!dsa
->meth
->bn_mod_exp(dsa
,&t2
,dsa
->pub_key
,u2
,dsa
->p
,ctx
,mont
))
850 /* let u1 = t1 * t2 mod p */
851 if (!BN_mod_mul(u1
,t1
,&t2
,dsa
->p
,ctx
))
863 cryptodev_dsa_do_sign(const unsigned char *dgst
, int dlen
, DSA
*dsa
)
865 struct crypt_kop kop
;
866 BIGNUM
*r
= NULL
, *s
= NULL
;
867 DSA_SIG
*dsaret
= NULL
;
869 if ((r
= BN_new()) == NULL
)
871 if ((s
= BN_new()) == NULL
) {
876 memset(&kop
, 0, sizeof kop
);
877 kop
.crk_op
= CRK_DSA_SIGN
;
879 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
880 kop
.crk_param
[0].crp_p
= (caddr_t
)dgst
;
881 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
882 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
884 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
886 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
888 if (bn2crparam(dsa
->priv_key
, &kop
.crk_param
[4]))
892 if (cryptodev_asym(&kop
, BN_num_bytes(dsa
->q
), r
,
893 BN_num_bytes(dsa
->q
), s
) == 0) {
894 dsaret
= DSA_SIG_new();
898 const DSA_METHOD
*meth
= DSA_OpenSSL();
901 dsaret
= (meth
->dsa_do_sign
)(dgst
, dlen
, dsa
);
904 kop
.crk_param
[0].crp_p
= NULL
;
910 cryptodev_dsa_verify(const unsigned char *dgst
, int dlen
,
911 DSA_SIG
*sig
, DSA
*dsa
)
913 struct crypt_kop kop
;
916 memset(&kop
, 0, sizeof kop
);
917 kop
.crk_op
= CRK_DSA_VERIFY
;
919 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
920 kop
.crk_param
[0].crp_p
= (caddr_t
)dgst
;
921 kop
.crk_param
[0].crp_nbits
= dlen
* 8;
922 if (bn2crparam(dsa
->p
, &kop
.crk_param
[1]))
924 if (bn2crparam(dsa
->q
, &kop
.crk_param
[2]))
926 if (bn2crparam(dsa
->g
, &kop
.crk_param
[3]))
928 if (bn2crparam(dsa
->pub_key
, &kop
.crk_param
[4]))
930 if (bn2crparam(sig
->r
, &kop
.crk_param
[5]))
932 if (bn2crparam(sig
->s
, &kop
.crk_param
[6]))
936 if (cryptodev_asym(&kop
, 0, NULL
, 0, NULL
) == 0) {
937 dsaret
= kop
.crk_status
;
939 const DSA_METHOD
*meth
= DSA_OpenSSL();
941 dsaret
= (meth
->dsa_do_verify
)(dgst
, dlen
, sig
, dsa
);
944 kop
.crk_param
[0].crp_p
= NULL
;
949 static DSA_METHOD cryptodev_dsa
= {
950 "cryptodev DSA method",
952 NULL
, /* dsa_sign_setup */
954 NULL
, /* dsa_mod_exp */
963 cryptodev_mod_exp_dh(const DH
*dh
, BIGNUM
*r
, const BIGNUM
*a
,
964 const BIGNUM
*p
, const BIGNUM
*m
, BN_CTX
*ctx
,
967 return (cryptodev_bn_mod_exp(r
, a
, p
, m
, ctx
, m_ctx
));
971 cryptodev_dh_compute_key(unsigned char *key
, const BIGNUM
*pub_key
, DH
*dh
)
973 struct crypt_kop kop
;
977 if ((fd
= get_asym_dev_crypto()) < 0) {
978 const DH_METHOD
*meth
= DH_OpenSSL();
980 return ((meth
->compute_key
)(key
, pub_key
, dh
));
983 keylen
= BN_num_bits(dh
->p
);
985 memset(&kop
, 0, sizeof kop
);
986 kop
.crk_op
= CRK_DH_COMPUTE_KEY
;
988 /* inputs: dh->priv_key pub_key dh->p key */
989 if (bn2crparam(dh
->priv_key
, &kop
.crk_param
[0]))
991 if (bn2crparam(pub_key
, &kop
.crk_param
[1]))
993 if (bn2crparam(dh
->p
, &kop
.crk_param
[2]))
997 kop
.crk_param
[3].crp_p
= key
;
998 kop
.crk_param
[3].crp_nbits
= keylen
* 8;
1001 if (ioctl(fd
, CIOCKEY
, &kop
) == -1) {
1002 const DH_METHOD
*meth
= DH_OpenSSL();
1004 dhret
= (meth
->compute_key
)(key
, pub_key
, dh
);
1007 kop
.crk_param
[3].crp_p
= NULL
;
1012 static DH_METHOD cryptodev_dh
= {
1013 "cryptodev DH method",
1014 NULL
, /* cryptodev_dh_generate_key */
1024 * ctrl right now is just a wrapper that doesn't do much
1025 * but I expect we'll want some options soon.
1028 cryptodev_ctrl(ENGINE
*e
, int cmd
, long i
, void *p
, void (*f
)())
1030 #ifdef HAVE_SYSLOG_R
1031 struct syslog_data sd
= SYSLOG_DATA_INIT
;
1036 #ifdef HAVE_SYSLOG_R
1037 syslog_r(LOG_ERR
, &sd
,
1038 "cryptodev_ctrl: unknown command %d", cmd
);
1040 syslog(LOG_ERR
, "cryptodev_ctrl: unknown command %d", cmd
);
1048 ENGINE_load_cryptodev(void)
1050 ENGINE
*engine
= ENGINE_new();
1055 if ((fd
= get_dev_crypto()) < 0) {
1056 ENGINE_free(engine
);
1061 * find out what asymmetric crypto algorithms we support
1063 if (ioctl(fd
, CIOCASYMFEAT
, &cryptodev_asymfeat
) == -1) {
1065 ENGINE_free(engine
);
1070 if (!ENGINE_set_id(engine
, "cryptodev") ||
1071 !ENGINE_set_name(engine
, "BSD cryptodev engine") ||
1072 !ENGINE_set_ciphers(engine
, cryptodev_engine_ciphers
) ||
1073 !ENGINE_set_digests(engine
, cryptodev_engine_digests
) ||
1074 !ENGINE_set_ctrl_function(engine
, cryptodev_ctrl
) ||
1075 !ENGINE_set_cmd_defns(engine
, cryptodev_defns
)) {
1076 ENGINE_free(engine
);
1080 if (ENGINE_set_RSA(engine
, &cryptodev_rsa
)) {
1081 const RSA_METHOD
*rsa_meth
= RSA_PKCS1_SSLeay();
1083 cryptodev_rsa
.bn_mod_exp
= rsa_meth
->bn_mod_exp
;
1084 cryptodev_rsa
.rsa_mod_exp
= rsa_meth
->rsa_mod_exp
;
1085 cryptodev_rsa
.rsa_pub_enc
= rsa_meth
->rsa_pub_enc
;
1086 cryptodev_rsa
.rsa_pub_dec
= rsa_meth
->rsa_pub_dec
;
1087 cryptodev_rsa
.rsa_priv_enc
= rsa_meth
->rsa_priv_enc
;
1088 cryptodev_rsa
.rsa_priv_dec
= rsa_meth
->rsa_priv_dec
;
1089 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1090 cryptodev_rsa
.bn_mod_exp
= cryptodev_bn_mod_exp
;
1091 if (cryptodev_asymfeat
& CRF_MOD_EXP_CRT
)
1092 cryptodev_rsa
.rsa_mod_exp
=
1093 cryptodev_rsa_mod_exp
;
1095 cryptodev_rsa
.rsa_mod_exp
=
1096 cryptodev_rsa_nocrt_mod_exp
;
1100 if (ENGINE_set_DSA(engine
, &cryptodev_dsa
)) {
1101 const DSA_METHOD
*meth
= DSA_OpenSSL();
1103 memcpy(&cryptodev_dsa
, meth
, sizeof(DSA_METHOD
));
1104 if (cryptodev_asymfeat
& CRF_DSA_SIGN
)
1105 cryptodev_dsa
.dsa_do_sign
= cryptodev_dsa_do_sign
;
1106 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1107 cryptodev_dsa
.bn_mod_exp
= cryptodev_dsa_bn_mod_exp
;
1108 cryptodev_dsa
.dsa_mod_exp
= cryptodev_dsa_dsa_mod_exp
;
1110 if (cryptodev_asymfeat
& CRF_DSA_VERIFY
)
1111 cryptodev_dsa
.dsa_do_verify
= cryptodev_dsa_verify
;
1114 if (ENGINE_set_DH(engine
, &cryptodev_dh
)){
1115 const DH_METHOD
*dh_meth
= DH_OpenSSL();
1117 cryptodev_dh
.generate_key
= dh_meth
->generate_key
;
1118 cryptodev_dh
.compute_key
= dh_meth
->compute_key
;
1119 cryptodev_dh
.bn_mod_exp
= dh_meth
->bn_mod_exp
;
1120 if (cryptodev_asymfeat
& CRF_MOD_EXP
) {
1121 cryptodev_dh
.bn_mod_exp
= cryptodev_mod_exp_dh
;
1122 if (cryptodev_asymfeat
& CRF_DH_COMPUTE_KEY
)
1123 cryptodev_dh
.compute_key
=
1124 cryptodev_dh_compute_key
;
1129 ENGINE_free(engine
);
1133 #endif /* HAVE_CRYPTODEV */