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>
33 #if (defined(__unix__) || defined(unix)) && !defined(USG)
34 #include <sys/param.h>
35 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
36 # define HAVE_CRYPTODEV
38 # if (OpenBSD >= 200110)
39 # define HAVE_SYSLOG_R
43 #ifndef HAVE_CRYPTODEV
46 ENGINE_load_cryptodev(void)
48 /* This is a NOP on platforms without /dev/crypto */
54 #include <sys/types.h>
55 #include <crypto/cryptodev.h>
56 #include <sys/ioctl.h>
66 struct dev_crypto_state {
67 struct session_op d_sess;
71 static u_int32_t cryptodev_asymfeat = 0;
73 static int get_asym_dev_crypto(void);
74 static int open_dev_crypto(void);
75 static int get_dev_crypto(void);
76 static int cryptodev_max_iv(int cipher);
77 static int cryptodev_key_length_valid(int cipher, int len);
78 static int cipher_nid_to_cryptodev(int nid);
79 static int get_cryptodev_ciphers(const int **cnids);
80 static int get_cryptodev_digests(const int **cnids);
81 static int cryptodev_usable_ciphers(const int **nids);
82 static int cryptodev_usable_digests(const int **nids);
83 static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
84 const unsigned char *in, unsigned int inl);
85 static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
86 const unsigned char *iv, int enc);
87 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
88 static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
89 const int **nids, int nid);
90 static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
91 const int **nids, int nid);
92 static int bn2crparam(const BIGNUM *a, struct crparam *crp);
93 static int crparam2bn(struct crparam *crp, BIGNUM *a);
94 static void zapparams(struct crypt_kop *kop);
95 static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
98 static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
99 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
100 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I,
102 static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
103 static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
104 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
105 static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
106 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
107 BN_CTX *ctx, BN_MONT_CTX *mont);
108 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst,
110 static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
111 DSA_SIG *sig, DSA *dsa);
112 static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
113 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
115 static int cryptodev_dh_compute_key(unsigned char *key,
116 const BIGNUM *pub_key, DH *dh);
117 static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
119 void ENGINE_load_cryptodev(void);
121 static const ENGINE_CMD_DEFN cryptodev_defns[] = {
131 { CRYPTO_DES_CBC, NID_des_cbc, 8, 8, },
132 { CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24, },
133 { CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16, },
134 { CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16, },
135 { CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16, },
136 { CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0, },
137 { 0, NID_undef, 0, 0, },
144 { CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, },
145 { CRYPTO_RIPEMD160_HMAC, NID_ripemd160, },
146 { CRYPTO_MD5_KPDK, NID_undef, },
147 { CRYPTO_SHA1_KPDK, NID_undef, },
148 { CRYPTO_MD5, NID_md5, },
149 { CRYPTO_SHA1, NID_undef, },
154 * Return a fd if /dev/crypto seems usable, 0 otherwise.
157 open_dev_crypto(void)
162 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
165 if (fcntl(fd, F_SETFD, 1) == -1) {
179 if ((fd = open_dev_crypto()) == -1)
181 if (ioctl(fd, CRIOGET, &retfd) == -1)
185 if (fcntl(retfd, F_SETFD, 1) == -1) {
192 /* Caching version for asym operations */
194 get_asym_dev_crypto(void)
199 fd = get_dev_crypto();
204 * XXXX this needs to be set for each alg - and determined from
208 cryptodev_max_iv(int cipher)
212 for (i = 0; ciphers[i].id; i++)
213 if (ciphers[i].id == cipher)
214 return (ciphers[i].ivmax);
219 * XXXX this needs to be set for each alg - and determined from
220 * a running card. For now, fake it out - but most of these
221 * for real devices should return 1 for the supported key
222 * sizes the device can handle.
225 cryptodev_key_length_valid(int cipher, int len)
229 for (i = 0; ciphers[i].id; i++)
230 if (ciphers[i].id == cipher)
231 return (ciphers[i].keylen == len);
235 /* convert libcrypto nids to cryptodev */
237 cipher_nid_to_cryptodev(int nid)
241 for (i = 0; ciphers[i].id; i++)
242 if (ciphers[i].nid == nid)
243 return (ciphers[i].id);
248 * Find out what ciphers /dev/crypto will let us have a session for.
249 * XXX note, that some of these openssl doesn't deal with yet!
250 * returning them here is harmless, as long as we return NULL
251 * when asked for a handler in the cryptodev_engine_ciphers routine
254 get_cryptodev_ciphers(const int **cnids)
256 static int nids[CRYPTO_ALGORITHM_MAX];
257 struct session_op sess;
258 int fd, i, count = 0;
260 if ((fd = get_dev_crypto()) < 0) {
264 memset(&sess, 0, sizeof(sess));
265 sess.key = (caddr_t)"123456781234567812345678";
267 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
268 if (ciphers[i].nid == NID_undef)
270 sess.cipher = ciphers[i].id;
271 sess.keylen = ciphers[i].keylen;
273 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
274 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
275 nids[count++] = ciphers[i].nid;
287 * Find out what digests /dev/crypto will let us have a session for.
288 * XXX note, that some of these openssl doesn't deal with yet!
289 * returning them here is harmless, as long as we return NULL
290 * when asked for a handler in the cryptodev_engine_digests routine
293 get_cryptodev_digests(const int **cnids)
295 static int nids[CRYPTO_ALGORITHM_MAX];
296 struct session_op sess;
297 int fd, i, count = 0;
299 if ((fd = get_dev_crypto()) < 0) {
303 memset(&sess, 0, sizeof(sess));
304 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
305 if (digests[i].nid == NID_undef)
307 sess.mac = digests[i].id;
309 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
310 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
311 nids[count++] = digests[i].nid;
323 * Find the useable ciphers|digests from dev/crypto - this is the first
324 * thing called by the engine init crud which determines what it
325 * can use for ciphers from this engine. We want to return
326 * only what we can do, anythine else is handled by software.
328 * If we can't initialize the device to do anything useful for
329 * any reason, we want to return a NULL array, and 0 length,
330 * which forces everything to be done is software. By putting
331 * the initalization of the device in here, we ensure we can
332 * use this engine as the default, and if for whatever reason
333 * /dev/crypto won't do what we want it will just be done in
336 * This can (should) be greatly expanded to perhaps take into
337 * account speed of the device, and what we want to do.
338 * (although the disabling of particular alg's could be controlled
339 * by the device driver with sysctl's.) - this is where we
340 * want most of the decisions made about what we actually want
341 * to use from /dev/crypto.
344 cryptodev_usable_ciphers(const int **nids)
346 return (get_cryptodev_ciphers(nids));
350 cryptodev_usable_digests(const int **nids)
353 * XXXX just disable all digests for now, because it sucks.
354 * we need a better way to decide this - i.e. I may not
355 * want digests on slow cards like hifn on fast machines,
356 * but might want them on slow or loaded machines, etc.
357 * will also want them when using crypto cards that don't
358 * suck moose gonads - would be nice to be able to decide something
359 * as reasonable default without having hackery that's card dependent.
360 * of course, the default should probably be just do everything,
361 * with perhaps a sysctl to turn algoritms off (or have them off
362 * by default) on cards that generally suck like the hifn.
369 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
370 const unsigned char *in, unsigned int inl)
372 struct crypt_op cryp;
373 struct dev_crypto_state *state = ctx->cipher_data;
374 struct session_op *sess = &state->d_sess;
376 unsigned char save_iv[EVP_MAX_IV_LENGTH];
382 if ((inl % ctx->cipher->block_size) != 0)
385 memset(&cryp, 0, sizeof(cryp));
387 cryp.ses = sess->ses;
390 cryp.src = (caddr_t) in;
391 cryp.dst = (caddr_t) out;
394 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
396 if (ctx->cipher->iv_len) {
397 cryp.iv = (caddr_t) ctx->iv;
399 iiv = (void *) in + inl - ctx->cipher->iv_len;
400 memcpy(save_iv, iiv, ctx->cipher->iv_len);
405 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
406 /* XXX need better errror handling
407 * this can fail for a number of different reasons.
412 if (ctx->cipher->iv_len) {
414 iiv = (void *) out + inl - ctx->cipher->iv_len;
417 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
423 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
424 const unsigned char *iv, int enc)
426 struct dev_crypto_state *state = ctx->cipher_data;
427 struct session_op *sess = &state->d_sess;
430 if ((cipher = cipher_nid_to_cryptodev(ctx->cipher->nid)) == NID_undef)
433 if (ctx->cipher->iv_len > cryptodev_max_iv(cipher))
436 if (!cryptodev_key_length_valid(cipher, ctx->key_len))
439 memset(sess, 0, sizeof(struct session_op));
441 if ((state->d_fd = get_dev_crypto()) < 0)
444 sess->key = (unsigned char *)key;
445 sess->keylen = ctx->key_len;
446 sess->cipher = cipher;
448 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
457 * free anything we allocated earlier when initting a
458 * session, and close the session.
461 cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
464 struct dev_crypto_state *state = ctx->cipher_data;
465 struct session_op *sess = &state->d_sess;
470 /* XXX if this ioctl fails, someting's wrong. the invoker
471 * may have called us with a bogus ctx, or we could
472 * have a device that for whatever reason just doesn't
473 * want to play ball - it's not clear what's right
474 * here - should this be an error? should it just
475 * increase a counter, hmm. For right now, we return
476 * 0 - I don't believe that to be "right". we could
477 * call the gorpy openssl lib error handlers that
478 * print messages to users of the library. hmm..
481 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
493 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
494 * gets called when libcrypto requests a cipher NID.
498 const EVP_CIPHER cryptodev_des_cbc = {
505 sizeof(struct dev_crypto_state),
506 EVP_CIPHER_set_asn1_iv,
507 EVP_CIPHER_get_asn1_iv,
512 const EVP_CIPHER cryptodev_3des_cbc = {
519 sizeof(struct dev_crypto_state),
520 EVP_CIPHER_set_asn1_iv,
521 EVP_CIPHER_get_asn1_iv,
525 const EVP_CIPHER cryptodev_bf_cbc = {
532 sizeof(struct dev_crypto_state),
533 EVP_CIPHER_set_asn1_iv,
534 EVP_CIPHER_get_asn1_iv,
538 const EVP_CIPHER cryptodev_cast_cbc = {
545 sizeof(struct dev_crypto_state),
546 EVP_CIPHER_set_asn1_iv,
547 EVP_CIPHER_get_asn1_iv,
551 const EVP_CIPHER cryptodev_aes_cbc = {
558 sizeof(struct dev_crypto_state),
559 EVP_CIPHER_set_asn1_iv,
560 EVP_CIPHER_get_asn1_iv,
565 * Registered by the ENGINE when used to find out how to deal with
566 * a particular NID in the ENGINE. this says what we'll do at the
567 * top level - note, that list is restricted by what we answer with
570 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
571 const int **nids, int nid)
574 return (cryptodev_usable_ciphers(nids));
577 case NID_des_ede3_cbc:
578 *cipher = &cryptodev_3des_cbc;
581 *cipher = &cryptodev_des_cbc;
584 *cipher = &cryptodev_bf_cbc;
587 *cipher = &cryptodev_cast_cbc;
589 case NID_aes_128_cbc:
590 *cipher = &cryptodev_aes_cbc;
596 return (*cipher != NULL);
600 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
601 const int **nids, int nid)
604 return (cryptodev_usable_digests(nids));
608 *digest = NULL; /* need to make a clean md5 critter */
614 return (*digest != NULL);
618 * Convert a BIGNUM to the representation that /dev/crypto needs.
619 * Upon completion of use, the caller is responsible for freeing
623 bn2crparam(const BIGNUM *a, struct crparam *crp)
626 ssize_t words, bytes, bits;
632 bits = BN_num_bits(a);
633 bytes = (bits + 7) / 8;
640 crp->crp_nbits = bits;
642 for (i = 0, j = 0; i < a->top; i++) {
643 for (k = 0; k < BN_BITS2 / 8; k++) {
644 if ((j + k) >= bytes)
646 b[j + k] = a->d[i] >> (k * 8);
653 /* Convert a /dev/crypto parameter to a BIGNUM */
655 crparam2bn(struct crparam *crp, BIGNUM *a)
660 bytes = (crp->crp_nbits + 7) / 8;
665 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
668 for (i = 0; i < bytes; i++)
669 pd[i] = crp->crp_p[bytes - i - 1];
671 BN_bin2bn(pd, bytes, a);
678 zapparams(struct crypt_kop *kop)
682 for (i = 0; i <= kop->crk_iparams + kop->crk_oparams; i++) {
683 if (kop->crk_param[i].crp_p)
684 free(kop->crk_param[i].crp_p);
685 kop->crk_param[i].crp_p = NULL;
686 kop->crk_param[i].crp_nbits = 0;
691 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s)
695 if ((fd = get_asym_dev_crypto()) < 0)
699 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
700 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
704 kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char));
705 kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8;
709 if (ioctl(fd, CIOCKEY, kop) == 0) {
711 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
713 crparam2bn(&kop->crk_param[kop->crk_iparams+1], s);
721 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
722 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
724 struct crypt_kop kop;
727 /* Currently, we know we can do mod exp iff we can do any
728 * asymmetric operations at all.
730 if (cryptodev_asymfeat == 0) {
731 ret = BN_mod_exp(r, a, p, m, ctx);
735 memset(&kop, 0, sizeof kop);
736 kop.crk_op = CRK_MOD_EXP;
738 /* inputs: a^p % m */
739 if (bn2crparam(a, &kop.crk_param[0]))
741 if (bn2crparam(p, &kop.crk_param[1]))
743 if (bn2crparam(m, &kop.crk_param[2]))
747 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL) == -1) {
748 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
749 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
757 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
763 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
769 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
771 struct crypt_kop kop;
774 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
775 /* XXX 0 means failure?? */
779 memset(&kop, 0, sizeof kop);
780 kop.crk_op = CRK_MOD_EXP_CRT;
781 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
782 if (bn2crparam(rsa->p, &kop.crk_param[0]))
784 if (bn2crparam(rsa->q, &kop.crk_param[1]))
786 if (bn2crparam(I, &kop.crk_param[2]))
788 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
790 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
792 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
796 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL) == -1) {
797 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
798 ret = (*meth->rsa_mod_exp)(r0, I, rsa);
805 static RSA_METHOD cryptodev_rsa = {
806 "cryptodev RSA method",
807 NULL, /* rsa_pub_enc */
808 NULL, /* rsa_pub_dec */
809 NULL, /* rsa_priv_enc */
810 NULL, /* rsa_priv_dec */
818 NULL /* rsa_verify */
822 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
823 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
825 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
829 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
830 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
831 BN_CTX *ctx, BN_MONT_CTX *mont)
838 /* v = ( g^u1 * y^u2 mod p ) mod q */
839 /* let t1 = g ^ u1 mod p */
842 if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont))
845 /* let t2 = y ^ u2 mod p */
846 if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont))
848 /* let u1 = t1 * t2 mod p */
849 if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx))
861 cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
863 struct crypt_kop kop;
864 BIGNUM *r = NULL, *s = NULL;
865 DSA_SIG *dsaret = NULL;
867 if ((r = BN_new()) == NULL)
869 if ((s = BN_new()) == NULL) {
874 memset(&kop, 0, sizeof kop);
875 kop.crk_op = CRK_DSA_SIGN;
877 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
878 kop.crk_param[0].crp_p = (caddr_t)dgst;
879 kop.crk_param[0].crp_nbits = dlen * 8;
880 if (bn2crparam(dsa->p, &kop.crk_param[1]))
882 if (bn2crparam(dsa->q, &kop.crk_param[2]))
884 if (bn2crparam(dsa->g, &kop.crk_param[3]))
886 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
890 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
891 BN_num_bytes(dsa->q), s) == 0) {
892 dsaret = DSA_SIG_new();
896 const DSA_METHOD *meth = DSA_OpenSSL();
899 dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa);
902 kop.crk_param[0].crp_p = NULL;
908 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
909 DSA_SIG *sig, DSA *dsa)
911 struct crypt_kop kop;
914 memset(&kop, 0, sizeof kop);
915 kop.crk_op = CRK_DSA_VERIFY;
917 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
918 kop.crk_param[0].crp_p = (caddr_t)dgst;
919 kop.crk_param[0].crp_nbits = dlen * 8;
920 if (bn2crparam(dsa->p, &kop.crk_param[1]))
922 if (bn2crparam(dsa->q, &kop.crk_param[2]))
924 if (bn2crparam(dsa->g, &kop.crk_param[3]))
926 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
928 if (bn2crparam(sig->r, &kop.crk_param[5]))
930 if (bn2crparam(sig->s, &kop.crk_param[6]))
934 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
935 dsaret = kop.crk_status;
937 const DSA_METHOD *meth = DSA_OpenSSL();
939 dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa);
942 kop.crk_param[0].crp_p = NULL;
947 static DSA_METHOD cryptodev_dsa = {
948 "cryptodev DSA method",
950 NULL, /* dsa_sign_setup */
952 NULL, /* dsa_mod_exp */
961 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
962 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
965 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
969 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
971 struct crypt_kop kop;
975 if ((fd = get_asym_dev_crypto()) < 0) {
976 const DH_METHOD *meth = DH_OpenSSL();
978 return ((meth->compute_key)(key, pub_key, dh));
981 keylen = BN_num_bits(dh->p);
983 memset(&kop, 0, sizeof kop);
984 kop.crk_op = CRK_DH_COMPUTE_KEY;
986 /* inputs: dh->priv_key pub_key dh->p key */
987 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
989 if (bn2crparam(pub_key, &kop.crk_param[1]))
991 if (bn2crparam(dh->p, &kop.crk_param[2]))
995 kop.crk_param[3].crp_p = key;
996 kop.crk_param[3].crp_nbits = keylen * 8;
999 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1000 const DH_METHOD *meth = DH_OpenSSL();
1002 dhret = (meth->compute_key)(key, pub_key, dh);
1005 kop.crk_param[3].crp_p = NULL;
1010 static DH_METHOD cryptodev_dh = {
1011 "cryptodev DH method",
1012 NULL, /* cryptodev_dh_generate_key */
1022 * ctrl right now is just a wrapper that doesn't do much
1023 * but I expect we'll want some options soon.
1026 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
1028 #ifdef HAVE_SYSLOG_R
1029 struct syslog_data sd = SYSLOG_DATA_INIT;
1034 #ifdef HAVE_SYSLOG_R
1035 syslog_r(LOG_ERR, &sd,
1036 "cryptodev_ctrl: unknown command %d", cmd);
1038 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1046 ENGINE_load_cryptodev(void)
1048 ENGINE *engine = ENGINE_new();
1053 if ((fd = get_dev_crypto()) < 0) {
1054 ENGINE_free(engine);
1059 * find out what asymmetric crypto algorithms we support
1061 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1063 ENGINE_free(engine);
1068 if (!ENGINE_set_id(engine, "cryptodev") ||
1069 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1070 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1071 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1072 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1073 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1074 ENGINE_free(engine);
1078 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1079 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1081 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1082 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1083 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1084 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1085 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1086 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1087 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1088 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1089 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1090 cryptodev_rsa.rsa_mod_exp =
1091 cryptodev_rsa_mod_exp;
1093 cryptodev_rsa.rsa_mod_exp =
1094 cryptodev_rsa_nocrt_mod_exp;
1098 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1099 const DSA_METHOD *meth = DSA_OpenSSL();
1101 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1102 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1103 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1104 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1105 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1106 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1108 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1109 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1112 if (ENGINE_set_DH(engine, &cryptodev_dh)){
1113 const DH_METHOD *dh_meth = DH_OpenSSL();
1115 cryptodev_dh.generate_key = dh_meth->generate_key;
1116 cryptodev_dh.compute_key = dh_meth->compute_key;
1117 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1118 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1119 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1120 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1121 cryptodev_dh.compute_key =
1122 cryptodev_dh_compute_key;
1127 ENGINE_free(engine);
1131 #endif /* HAVE_CRYPTODEV */