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.
15 * 3. Neither the name of the author nor the names of contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <openssl/objects.h>
33 #include <openssl/engine.h>
34 #include <openssl/evp.h>
36 #if (defined(__unix__) || defined(unix)) && !defined(USG) && \
37 (defined(OpenBSD) || defined(__FreeBSD_version))
38 #include <sys/param.h>
39 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
40 # define HAVE_CRYPTODEV
42 # if (OpenBSD >= 200110)
43 # define HAVE_SYSLOG_R
47 #ifndef HAVE_CRYPTODEV
50 ENGINE_load_cryptodev(void)
52 /* This is a NOP on platforms without /dev/crypto */
58 #include <sys/types.h>
59 #include <crypto/cryptodev.h>
60 #include <sys/ioctl.h>
70 struct dev_crypto_state {
71 struct session_op d_sess;
75 static u_int32_t cryptodev_asymfeat = 0;
77 static int get_asym_dev_crypto(void);
78 static int open_dev_crypto(void);
79 static int get_dev_crypto(void);
80 static int cryptodev_max_iv(int cipher);
81 static int cryptodev_key_length_valid(int cipher, int len);
82 static int cipher_nid_to_cryptodev(int nid);
83 static int get_cryptodev_ciphers(const int **cnids);
84 static int get_cryptodev_digests(const int **cnids);
85 static int cryptodev_usable_ciphers(const int **nids);
86 static int cryptodev_usable_digests(const int **nids);
87 static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
88 const unsigned char *in, unsigned int inl);
89 static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
90 const unsigned char *iv, int enc);
91 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
92 static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
93 const int **nids, int nid);
94 static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
95 const int **nids, int nid);
96 static int bn2crparam(const BIGNUM *a, struct crparam *crp);
97 static int crparam2bn(struct crparam *crp, BIGNUM *a);
98 static void zapparams(struct crypt_kop *kop);
99 static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
100 int slen, BIGNUM *s);
102 static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
103 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
104 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I,
106 static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
107 static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
108 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
109 static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
110 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
111 BN_CTX *ctx, BN_MONT_CTX *mont);
112 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst,
114 static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
115 DSA_SIG *sig, DSA *dsa);
116 static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
117 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
119 static int cryptodev_dh_compute_key(unsigned char *key,
120 const BIGNUM *pub_key, DH *dh);
121 static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
123 void ENGINE_load_cryptodev(void);
125 static const ENGINE_CMD_DEFN cryptodev_defns[] = {
135 { CRYPTO_DES_CBC, NID_des_cbc, 8, 8, },
136 { CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24, },
137 { CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16, },
138 { CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16, },
139 { CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16, },
140 { CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0, },
141 { 0, NID_undef, 0, 0, },
148 { CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, },
149 { CRYPTO_RIPEMD160_HMAC, NID_ripemd160, },
150 { CRYPTO_MD5_KPDK, NID_undef, },
151 { CRYPTO_SHA1_KPDK, NID_undef, },
152 { CRYPTO_MD5, NID_md5, },
153 { CRYPTO_SHA1, NID_undef, },
158 * Return a fd if /dev/crypto seems usable, 0 otherwise.
161 open_dev_crypto(void)
166 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
169 if (fcntl(fd, F_SETFD, 1) == -1) {
183 if ((fd = open_dev_crypto()) == -1)
185 if (ioctl(fd, CRIOGET, &retfd) == -1)
189 if (fcntl(retfd, F_SETFD, 1) == -1) {
196 /* Caching version for asym operations */
198 get_asym_dev_crypto(void)
203 fd = get_dev_crypto();
208 * XXXX this needs to be set for each alg - and determined from
212 cryptodev_max_iv(int cipher)
216 for (i = 0; ciphers[i].id; i++)
217 if (ciphers[i].id == cipher)
218 return (ciphers[i].ivmax);
223 * XXXX this needs to be set for each alg - and determined from
224 * a running card. For now, fake it out - but most of these
225 * for real devices should return 1 for the supported key
226 * sizes the device can handle.
229 cryptodev_key_length_valid(int cipher, int len)
233 for (i = 0; ciphers[i].id; i++)
234 if (ciphers[i].id == cipher)
235 return (ciphers[i].keylen == len);
239 /* convert libcrypto nids to cryptodev */
241 cipher_nid_to_cryptodev(int nid)
245 for (i = 0; ciphers[i].id; i++)
246 if (ciphers[i].nid == nid)
247 return (ciphers[i].id);
252 * Find out what ciphers /dev/crypto will let us have a session for.
253 * XXX note, that some of these openssl doesn't deal with yet!
254 * returning them here is harmless, as long as we return NULL
255 * when asked for a handler in the cryptodev_engine_ciphers routine
258 get_cryptodev_ciphers(const int **cnids)
260 static int nids[CRYPTO_ALGORITHM_MAX];
261 struct session_op sess;
262 int fd, i, count = 0;
264 if ((fd = get_dev_crypto()) < 0) {
268 memset(&sess, 0, sizeof(sess));
269 sess.key = (caddr_t)"123456781234567812345678";
271 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
272 if (ciphers[i].nid == NID_undef)
274 sess.cipher = ciphers[i].id;
275 sess.keylen = ciphers[i].keylen;
277 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
278 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
279 nids[count++] = ciphers[i].nid;
291 * Find out what digests /dev/crypto will let us have a session for.
292 * XXX note, that some of these openssl doesn't deal with yet!
293 * returning them here is harmless, as long as we return NULL
294 * when asked for a handler in the cryptodev_engine_digests routine
297 get_cryptodev_digests(const int **cnids)
299 static int nids[CRYPTO_ALGORITHM_MAX];
300 struct session_op sess;
301 int fd, i, count = 0;
303 if ((fd = get_dev_crypto()) < 0) {
307 memset(&sess, 0, sizeof(sess));
308 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
309 if (digests[i].nid == NID_undef)
311 sess.mac = digests[i].id;
313 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
314 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
315 nids[count++] = digests[i].nid;
327 * Find the useable ciphers|digests from dev/crypto - this is the first
328 * thing called by the engine init crud which determines what it
329 * can use for ciphers from this engine. We want to return
330 * only what we can do, anythine else is handled by software.
332 * If we can't initialize the device to do anything useful for
333 * any reason, we want to return a NULL array, and 0 length,
334 * which forces everything to be done is software. By putting
335 * the initalization of the device in here, we ensure we can
336 * use this engine as the default, and if for whatever reason
337 * /dev/crypto won't do what we want it will just be done in
340 * This can (should) be greatly expanded to perhaps take into
341 * account speed of the device, and what we want to do.
342 * (although the disabling of particular alg's could be controlled
343 * by the device driver with sysctl's.) - this is where we
344 * want most of the decisions made about what we actually want
345 * to use from /dev/crypto.
348 cryptodev_usable_ciphers(const int **nids)
350 return (get_cryptodev_ciphers(nids));
354 cryptodev_usable_digests(const int **nids)
357 * XXXX just disable all digests for now, because it sucks.
358 * we need a better way to decide this - i.e. I may not
359 * want digests on slow cards like hifn on fast machines,
360 * but might want them on slow or loaded machines, etc.
361 * will also want them when using crypto cards that don't
362 * suck moose gonads - would be nice to be able to decide something
363 * as reasonable default without having hackery that's card dependent.
364 * of course, the default should probably be just do everything,
365 * with perhaps a sysctl to turn algoritms off (or have them off
366 * by default) on cards that generally suck like the hifn.
373 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
374 const unsigned char *in, unsigned int inl)
376 struct crypt_op cryp;
377 struct dev_crypto_state *state = ctx->cipher_data;
378 struct session_op *sess = &state->d_sess;
380 unsigned char save_iv[EVP_MAX_IV_LENGTH];
386 if ((inl % ctx->cipher->block_size) != 0)
389 memset(&cryp, 0, sizeof(cryp));
391 cryp.ses = sess->ses;
394 cryp.src = (caddr_t) in;
395 cryp.dst = (caddr_t) out;
398 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
400 if (ctx->cipher->iv_len) {
401 cryp.iv = (caddr_t) ctx->iv;
403 iiv = (void *) in + inl - ctx->cipher->iv_len;
404 memcpy(save_iv, iiv, ctx->cipher->iv_len);
409 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
410 /* XXX need better errror handling
411 * this can fail for a number of different reasons.
416 if (ctx->cipher->iv_len) {
418 iiv = (void *) out + inl - ctx->cipher->iv_len;
421 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
427 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
428 const unsigned char *iv, int enc)
430 struct dev_crypto_state *state = ctx->cipher_data;
431 struct session_op *sess = &state->d_sess;
434 if ((cipher = cipher_nid_to_cryptodev(ctx->cipher->nid)) == NID_undef)
437 if (ctx->cipher->iv_len > cryptodev_max_iv(cipher))
440 if (!cryptodev_key_length_valid(cipher, ctx->key_len))
443 memset(sess, 0, sizeof(struct session_op));
445 if ((state->d_fd = get_dev_crypto()) < 0)
448 sess->key = (unsigned char *)key;
449 sess->keylen = ctx->key_len;
450 sess->cipher = cipher;
452 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
461 * free anything we allocated earlier when initting a
462 * session, and close the session.
465 cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
468 struct dev_crypto_state *state = ctx->cipher_data;
469 struct session_op *sess = &state->d_sess;
474 /* XXX if this ioctl fails, someting's wrong. the invoker
475 * may have called us with a bogus ctx, or we could
476 * have a device that for whatever reason just doesn't
477 * want to play ball - it's not clear what's right
478 * here - should this be an error? should it just
479 * increase a counter, hmm. For right now, we return
480 * 0 - I don't believe that to be "right". we could
481 * call the gorpy openssl lib error handlers that
482 * print messages to users of the library. hmm..
485 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
497 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
498 * gets called when libcrypto requests a cipher NID.
502 const EVP_CIPHER cryptodev_des_cbc = {
509 sizeof(struct dev_crypto_state),
510 EVP_CIPHER_set_asn1_iv,
511 EVP_CIPHER_get_asn1_iv,
516 const EVP_CIPHER cryptodev_3des_cbc = {
523 sizeof(struct dev_crypto_state),
524 EVP_CIPHER_set_asn1_iv,
525 EVP_CIPHER_get_asn1_iv,
529 const EVP_CIPHER cryptodev_bf_cbc = {
536 sizeof(struct dev_crypto_state),
537 EVP_CIPHER_set_asn1_iv,
538 EVP_CIPHER_get_asn1_iv,
542 const EVP_CIPHER cryptodev_cast_cbc = {
549 sizeof(struct dev_crypto_state),
550 EVP_CIPHER_set_asn1_iv,
551 EVP_CIPHER_get_asn1_iv,
555 const EVP_CIPHER cryptodev_aes_cbc = {
562 sizeof(struct dev_crypto_state),
563 EVP_CIPHER_set_asn1_iv,
564 EVP_CIPHER_get_asn1_iv,
569 * Registered by the ENGINE when used to find out how to deal with
570 * a particular NID in the ENGINE. this says what we'll do at the
571 * top level - note, that list is restricted by what we answer with
574 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
575 const int **nids, int nid)
578 return (cryptodev_usable_ciphers(nids));
581 case NID_des_ede3_cbc:
582 *cipher = &cryptodev_3des_cbc;
585 *cipher = &cryptodev_des_cbc;
588 *cipher = &cryptodev_bf_cbc;
591 *cipher = &cryptodev_cast_cbc;
593 case NID_aes_128_cbc:
594 *cipher = &cryptodev_aes_cbc;
600 return (*cipher != NULL);
604 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
605 const int **nids, int nid)
608 return (cryptodev_usable_digests(nids));
612 *digest = NULL; /* need to make a clean md5 critter */
618 return (*digest != NULL);
622 * Convert a BIGNUM to the representation that /dev/crypto needs.
623 * Upon completion of use, the caller is responsible for freeing
627 bn2crparam(const BIGNUM *a, struct crparam *crp)
630 ssize_t words, bytes, bits;
636 bits = BN_num_bits(a);
637 bytes = (bits + 7) / 8;
644 crp->crp_nbits = bits;
646 for (i = 0, j = 0; i < a->top; i++) {
647 for (k = 0; k < BN_BITS2 / 8; k++) {
648 if ((j + k) >= bytes)
650 b[j + k] = a->d[i] >> (k * 8);
657 /* Convert a /dev/crypto parameter to a BIGNUM */
659 crparam2bn(struct crparam *crp, BIGNUM *a)
664 bytes = (crp->crp_nbits + 7) / 8;
669 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
672 for (i = 0; i < bytes; i++)
673 pd[i] = crp->crp_p[bytes - i - 1];
675 BN_bin2bn(pd, bytes, a);
682 zapparams(struct crypt_kop *kop)
686 for (i = 0; i <= kop->crk_iparams + kop->crk_oparams; i++) {
687 if (kop->crk_param[i].crp_p)
688 free(kop->crk_param[i].crp_p);
689 kop->crk_param[i].crp_p = NULL;
690 kop->crk_param[i].crp_nbits = 0;
695 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s)
699 if ((fd = get_asym_dev_crypto()) < 0)
703 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
704 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
708 kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char));
709 kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8;
713 if (ioctl(fd, CIOCKEY, kop) == 0) {
715 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
717 crparam2bn(&kop->crk_param[kop->crk_iparams+1], s);
725 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
726 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
728 struct crypt_kop kop;
731 /* Currently, we know we can do mod exp iff we can do any
732 * asymmetric operations at all.
734 if (cryptodev_asymfeat == 0) {
735 ret = BN_mod_exp(r, a, p, m, ctx);
739 memset(&kop, 0, sizeof kop);
740 kop.crk_op = CRK_MOD_EXP;
742 /* inputs: a^p % m */
743 if (bn2crparam(a, &kop.crk_param[0]))
745 if (bn2crparam(p, &kop.crk_param[1]))
747 if (bn2crparam(m, &kop.crk_param[2]))
751 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL) == -1) {
752 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
753 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
761 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
767 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
773 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
775 struct crypt_kop kop;
778 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
779 /* XXX 0 means failure?? */
783 memset(&kop, 0, sizeof kop);
784 kop.crk_op = CRK_MOD_EXP_CRT;
785 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
786 if (bn2crparam(rsa->p, &kop.crk_param[0]))
788 if (bn2crparam(rsa->q, &kop.crk_param[1]))
790 if (bn2crparam(I, &kop.crk_param[2]))
792 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
794 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
796 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
800 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL) == -1) {
801 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
802 ret = (*meth->rsa_mod_exp)(r0, I, rsa);
809 static RSA_METHOD cryptodev_rsa = {
810 "cryptodev RSA method",
811 NULL, /* rsa_pub_enc */
812 NULL, /* rsa_pub_dec */
813 NULL, /* rsa_priv_enc */
814 NULL, /* rsa_priv_dec */
822 NULL /* rsa_verify */
826 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
827 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
829 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
833 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
834 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
835 BN_CTX *ctx, BN_MONT_CTX *mont)
842 /* v = ( g^u1 * y^u2 mod p ) mod q */
843 /* let t1 = g ^ u1 mod p */
846 if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont))
849 /* let t2 = y ^ u2 mod p */
850 if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont))
852 /* let u1 = t1 * t2 mod p */
853 if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx))
865 cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
867 struct crypt_kop kop;
868 BIGNUM *r = NULL, *s = NULL;
869 DSA_SIG *dsaret = NULL;
871 if ((r = BN_new()) == NULL)
873 if ((s = BN_new()) == NULL) {
879 memset(&kop, 0, sizeof kop);
880 kop.crk_op = CRK_DSA_SIGN;
882 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
883 kop.crk_param[0].crp_p = (caddr_t)dgst;
884 kop.crk_param[0].crp_nbits = dlen * 8;
885 if (bn2crparam(dsa->p, &kop.crk_param[1]))
887 if (bn2crparam(dsa->q, &kop.crk_param[2]))
889 if (bn2crparam(dsa->g, &kop.crk_param[3]))
891 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
895 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
896 BN_num_bytes(dsa->q), s) == 0) {
897 dsaret = DSA_SIG_new();
901 const DSA_METHOD *meth = DSA_OpenSSL();
904 dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa);
907 kop.crk_param[0].crp_p = NULL;
913 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
914 DSA_SIG *sig, DSA *dsa)
916 struct crypt_kop kop;
919 memset(&kop, 0, sizeof kop);
920 kop.crk_op = CRK_DSA_VERIFY;
922 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
923 kop.crk_param[0].crp_p = (caddr_t)dgst;
924 kop.crk_param[0].crp_nbits = dlen * 8;
925 if (bn2crparam(dsa->p, &kop.crk_param[1]))
927 if (bn2crparam(dsa->q, &kop.crk_param[2]))
929 if (bn2crparam(dsa->g, &kop.crk_param[3]))
931 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
933 if (bn2crparam(sig->r, &kop.crk_param[5]))
935 if (bn2crparam(sig->s, &kop.crk_param[6]))
939 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
940 dsaret = kop.crk_status;
942 const DSA_METHOD *meth = DSA_OpenSSL();
944 dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa);
947 kop.crk_param[0].crp_p = NULL;
952 static DSA_METHOD cryptodev_dsa = {
953 "cryptodev DSA method",
955 NULL, /* dsa_sign_setup */
957 NULL, /* dsa_mod_exp */
966 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
967 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
970 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
974 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
976 struct crypt_kop kop;
980 if ((fd = get_asym_dev_crypto()) < 0) {
981 const DH_METHOD *meth = DH_OpenSSL();
983 return ((meth->compute_key)(key, pub_key, dh));
986 keylen = BN_num_bits(dh->p);
988 memset(&kop, 0, sizeof kop);
989 kop.crk_op = CRK_DH_COMPUTE_KEY;
991 /* inputs: dh->priv_key pub_key dh->p key */
992 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
994 if (bn2crparam(pub_key, &kop.crk_param[1]))
996 if (bn2crparam(dh->p, &kop.crk_param[2]))
1000 kop.crk_param[3].crp_p = key;
1001 kop.crk_param[3].crp_nbits = keylen * 8;
1002 kop.crk_oparams = 1;
1004 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1005 const DH_METHOD *meth = DH_OpenSSL();
1007 dhret = (meth->compute_key)(key, pub_key, dh);
1010 kop.crk_param[3].crp_p = NULL;
1015 static DH_METHOD cryptodev_dh = {
1016 "cryptodev DH method",
1017 NULL, /* cryptodev_dh_generate_key */
1027 * ctrl right now is just a wrapper that doesn't do much
1028 * but I expect we'll want some options soon.
1031 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
1033 #ifdef HAVE_SYSLOG_R
1034 struct syslog_data sd = SYSLOG_DATA_INIT;
1039 #ifdef HAVE_SYSLOG_R
1040 syslog_r(LOG_ERR, &sd,
1041 "cryptodev_ctrl: unknown command %d", cmd);
1043 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1051 ENGINE_load_cryptodev(void)
1053 ENGINE *engine = ENGINE_new();
1058 if ((fd = get_dev_crypto()) < 0) {
1059 ENGINE_free(engine);
1064 * find out what asymmetric crypto algorithms we support
1066 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1068 ENGINE_free(engine);
1073 if (!ENGINE_set_id(engine, "cryptodev") ||
1074 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1075 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1076 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1077 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1078 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1079 ENGINE_free(engine);
1083 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1084 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1086 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1087 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1088 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1089 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1090 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1091 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1092 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1093 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1094 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1095 cryptodev_rsa.rsa_mod_exp =
1096 cryptodev_rsa_mod_exp;
1098 cryptodev_rsa.rsa_mod_exp =
1099 cryptodev_rsa_nocrt_mod_exp;
1103 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1104 const DSA_METHOD *meth = DSA_OpenSSL();
1106 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1107 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1108 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1109 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1110 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1111 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1113 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1114 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1117 if (ENGINE_set_DH(engine, &cryptodev_dh)){
1118 const DH_METHOD *dh_meth = DH_OpenSSL();
1120 cryptodev_dh.generate_key = dh_meth->generate_key;
1121 cryptodev_dh.compute_key = dh_meth->compute_key;
1122 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1123 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1124 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1125 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1126 cryptodev_dh.compute_key =
1127 cryptodev_dh_compute_key;
1132 ENGINE_free(engine);
1136 #endif /* HAVE_CRYPTODEV */