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>
33 #include <openssl/dsa.h>
34 #include <openssl/rsa.h>
35 #include <openssl/dh.h>
36 #include <openssl/err.h>
38 #if (defined(__unix__) || defined(unix)) && !defined(USG) && \
39 (defined(OpenBSD) || defined(__FreeBSD__))
40 #include <sys/param.h>
41 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
42 # define HAVE_CRYPTODEV
44 # if (OpenBSD >= 200110)
45 # define HAVE_SYSLOG_R
49 #ifndef HAVE_CRYPTODEV
52 ENGINE_load_cryptodev(void)
54 /* This is a NOP on platforms without /dev/crypto */
60 #include <sys/types.h>
61 #include <crypto/cryptodev.h>
62 #include <sys/ioctl.h>
72 struct dev_crypto_state {
73 struct session_op d_sess;
77 static u_int32_t cryptodev_asymfeat = 0;
79 static int get_asym_dev_crypto(void);
80 static int open_dev_crypto(void);
81 static int get_dev_crypto(void);
82 static int cryptodev_max_iv(int cipher);
83 static int cryptodev_key_length_valid(int cipher, int len);
84 static int cipher_nid_to_cryptodev(int nid);
85 static int get_cryptodev_ciphers(const int **cnids);
86 /*static int get_cryptodev_digests(const int **cnids);*/
87 static int cryptodev_usable_ciphers(const int **nids);
88 static int cryptodev_usable_digests(const int **nids);
89 static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
90 const unsigned char *in, unsigned int inl);
91 static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
92 const unsigned char *iv, int enc);
93 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
94 static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
95 const int **nids, int nid);
96 static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
97 const int **nids, int nid);
98 static int bn2crparam(const BIGNUM *a, struct crparam *crp);
99 static int crparam2bn(struct crparam *crp, BIGNUM *a);
100 static void zapparams(struct crypt_kop *kop);
101 static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
102 int slen, BIGNUM *s);
104 static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
105 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
106 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I,
107 RSA *rsa, BN_CTX *ctx);
108 static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
109 static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
110 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
111 static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
112 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
113 BN_CTX *ctx, BN_MONT_CTX *mont);
114 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst,
116 static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
117 DSA_SIG *sig, DSA *dsa);
118 static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
119 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
121 static int cryptodev_dh_compute_key(unsigned char *key,
122 const BIGNUM *pub_key, DH *dh);
123 static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
125 void ENGINE_load_cryptodev(void);
127 static const ENGINE_CMD_DEFN cryptodev_defns[] = {
137 { CRYPTO_DES_CBC, NID_des_cbc, 8, 8, },
138 { CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24, },
139 { CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16, },
140 { CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16, },
141 { CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16, },
142 { CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0, },
143 { 0, NID_undef, 0, 0, },
151 { CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, },
152 { CRYPTO_RIPEMD160_HMAC, NID_ripemd160, },
153 { CRYPTO_MD5_KPDK, NID_undef, },
154 { CRYPTO_SHA1_KPDK, NID_undef, },
155 { CRYPTO_MD5, NID_md5, },
156 { CRYPTO_SHA1, NID_undef, },
162 * Return a fd if /dev/crypto seems usable, 0 otherwise.
165 open_dev_crypto(void)
170 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
173 if (fcntl(fd, F_SETFD, 1) == -1) {
187 if ((fd = open_dev_crypto()) == -1)
189 if (ioctl(fd, CRIOGET, &retfd) == -1)
193 if (fcntl(retfd, F_SETFD, 1) == -1) {
200 /* Caching version for asym operations */
202 get_asym_dev_crypto(void)
207 fd = get_dev_crypto();
212 * XXXX this needs to be set for each alg - and determined from
216 cryptodev_max_iv(int cipher)
220 for (i = 0; ciphers[i].id; i++)
221 if (ciphers[i].id == cipher)
222 return (ciphers[i].ivmax);
227 * XXXX this needs to be set for each alg - and determined from
228 * a running card. For now, fake it out - but most of these
229 * for real devices should return 1 for the supported key
230 * sizes the device can handle.
233 cryptodev_key_length_valid(int cipher, int len)
237 for (i = 0; ciphers[i].id; i++)
238 if (ciphers[i].id == cipher)
239 return (ciphers[i].keylen == len);
243 /* convert libcrypto nids to cryptodev */
245 cipher_nid_to_cryptodev(int nid)
249 for (i = 0; ciphers[i].id; i++)
250 if (ciphers[i].nid == nid)
251 return (ciphers[i].id);
256 * Find out what ciphers /dev/crypto will let us have a session for.
257 * XXX note, that some of these openssl doesn't deal with yet!
258 * returning them here is harmless, as long as we return NULL
259 * when asked for a handler in the cryptodev_engine_ciphers routine
262 get_cryptodev_ciphers(const int **cnids)
264 static int nids[CRYPTO_ALGORITHM_MAX];
265 struct session_op sess;
266 int fd, i, count = 0;
268 if ((fd = get_dev_crypto()) < 0) {
272 memset(&sess, 0, sizeof(sess));
273 sess.key = (caddr_t)"123456781234567812345678";
275 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
276 if (ciphers[i].nid == NID_undef)
278 sess.cipher = ciphers[i].id;
279 sess.keylen = ciphers[i].keylen;
281 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
282 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
283 nids[count++] = ciphers[i].nid;
296 * Find out what digests /dev/crypto will let us have a session for.
297 * XXX note, that some of these openssl doesn't deal with yet!
298 * returning them here is harmless, as long as we return NULL
299 * when asked for a handler in the cryptodev_engine_digests routine
302 get_cryptodev_digests(const int **cnids)
304 static int nids[CRYPTO_ALGORITHM_MAX];
305 struct session_op sess;
306 int fd, i, count = 0;
308 if ((fd = get_dev_crypto()) < 0) {
312 memset(&sess, 0, sizeof(sess));
313 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
314 if (digests[i].nid == NID_undef)
316 sess.mac = digests[i].id;
318 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
319 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
320 nids[count++] = digests[i].nid;
334 * Find the useable ciphers|digests from dev/crypto - this is the first
335 * thing called by the engine init crud which determines what it
336 * can use for ciphers from this engine. We want to return
337 * only what we can do, anythine else is handled by software.
339 * If we can't initialize the device to do anything useful for
340 * any reason, we want to return a NULL array, and 0 length,
341 * which forces everything to be done is software. By putting
342 * the initalization of the device in here, we ensure we can
343 * use this engine as the default, and if for whatever reason
344 * /dev/crypto won't do what we want it will just be done in
347 * This can (should) be greatly expanded to perhaps take into
348 * account speed of the device, and what we want to do.
349 * (although the disabling of particular alg's could be controlled
350 * by the device driver with sysctl's.) - this is where we
351 * want most of the decisions made about what we actually want
352 * to use from /dev/crypto.
355 cryptodev_usable_ciphers(const int **nids)
357 return (get_cryptodev_ciphers(nids));
361 cryptodev_usable_digests(const int **nids)
364 * XXXX just disable all digests for now, because it sucks.
365 * we need a better way to decide this - i.e. I may not
366 * want digests on slow cards like hifn on fast machines,
367 * but might want them on slow or loaded machines, etc.
368 * will also want them when using crypto cards that don't
369 * suck moose gonads - would be nice to be able to decide something
370 * as reasonable default without having hackery that's card dependent.
371 * of course, the default should probably be just do everything,
372 * with perhaps a sysctl to turn algoritms off (or have them off
373 * by default) on cards that generally suck like the hifn.
380 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
381 const unsigned char *in, unsigned int inl)
383 struct crypt_op cryp;
384 struct dev_crypto_state *state = ctx->cipher_data;
385 struct session_op *sess = &state->d_sess;
387 unsigned char save_iv[EVP_MAX_IV_LENGTH];
393 if ((inl % ctx->cipher->block_size) != 0)
396 memset(&cryp, 0, sizeof(cryp));
398 cryp.ses = sess->ses;
401 cryp.src = (caddr_t) in;
402 cryp.dst = (caddr_t) out;
405 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
407 if (ctx->cipher->iv_len) {
408 cryp.iv = (caddr_t) ctx->iv;
410 iiv = in + inl - ctx->cipher->iv_len;
411 memcpy(save_iv, iiv, ctx->cipher->iv_len);
416 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
417 /* XXX need better errror handling
418 * this can fail for a number of different reasons.
423 if (ctx->cipher->iv_len) {
425 iiv = out + inl - ctx->cipher->iv_len;
428 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
434 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
435 const unsigned char *iv, int enc)
437 struct dev_crypto_state *state = ctx->cipher_data;
438 struct session_op *sess = &state->d_sess;
441 if ((cipher = cipher_nid_to_cryptodev(ctx->cipher->nid)) == NID_undef)
444 if (ctx->cipher->iv_len > cryptodev_max_iv(cipher))
447 if (!cryptodev_key_length_valid(cipher, ctx->key_len))
450 memset(sess, 0, sizeof(struct session_op));
452 if ((state->d_fd = get_dev_crypto()) < 0)
455 sess->key = (char *)key;
456 sess->keylen = ctx->key_len;
457 sess->cipher = cipher;
459 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
468 * free anything we allocated earlier when initting a
469 * session, and close the session.
472 cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
475 struct dev_crypto_state *state = ctx->cipher_data;
476 struct session_op *sess = &state->d_sess;
481 /* XXX if this ioctl fails, someting's wrong. the invoker
482 * may have called us with a bogus ctx, or we could
483 * have a device that for whatever reason just doesn't
484 * want to play ball - it's not clear what's right
485 * here - should this be an error? should it just
486 * increase a counter, hmm. For right now, we return
487 * 0 - I don't believe that to be "right". we could
488 * call the gorpy openssl lib error handlers that
489 * print messages to users of the library. hmm..
492 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
504 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
505 * gets called when libcrypto requests a cipher NID.
509 const EVP_CIPHER cryptodev_des_cbc = {
516 sizeof(struct dev_crypto_state),
517 EVP_CIPHER_set_asn1_iv,
518 EVP_CIPHER_get_asn1_iv,
523 const EVP_CIPHER cryptodev_3des_cbc = {
530 sizeof(struct dev_crypto_state),
531 EVP_CIPHER_set_asn1_iv,
532 EVP_CIPHER_get_asn1_iv,
536 const EVP_CIPHER cryptodev_bf_cbc = {
543 sizeof(struct dev_crypto_state),
544 EVP_CIPHER_set_asn1_iv,
545 EVP_CIPHER_get_asn1_iv,
549 const EVP_CIPHER cryptodev_cast_cbc = {
556 sizeof(struct dev_crypto_state),
557 EVP_CIPHER_set_asn1_iv,
558 EVP_CIPHER_get_asn1_iv,
562 const EVP_CIPHER cryptodev_aes_cbc = {
569 sizeof(struct dev_crypto_state),
570 EVP_CIPHER_set_asn1_iv,
571 EVP_CIPHER_get_asn1_iv,
576 * Registered by the ENGINE when used to find out how to deal with
577 * a particular NID in the ENGINE. this says what we'll do at the
578 * top level - note, that list is restricted by what we answer with
581 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
582 const int **nids, int nid)
585 return (cryptodev_usable_ciphers(nids));
588 case NID_des_ede3_cbc:
589 *cipher = &cryptodev_3des_cbc;
592 *cipher = &cryptodev_des_cbc;
595 *cipher = &cryptodev_bf_cbc;
598 *cipher = &cryptodev_cast_cbc;
600 case NID_aes_128_cbc:
601 *cipher = &cryptodev_aes_cbc;
607 return (*cipher != NULL);
611 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
612 const int **nids, int nid)
615 return (cryptodev_usable_digests(nids));
619 *digest = NULL; /* need to make a clean md5 critter */
625 return (*digest != NULL);
629 * Convert a BIGNUM to the representation that /dev/crypto needs.
630 * Upon completion of use, the caller is responsible for freeing
634 bn2crparam(const BIGNUM *a, struct crparam *crp)
643 bits = BN_num_bits(a);
644 bytes = (bits + 7) / 8;
650 crp->crp_p = (char *)b;
651 crp->crp_nbits = bits;
653 for (i = 0, j = 0; i < a->top; i++) {
654 for (k = 0; k < BN_BITS2 / 8; k++) {
655 if ((j + k) >= bytes)
657 b[j + k] = a->d[i] >> (k * 8);
664 /* Convert a /dev/crypto parameter to a BIGNUM */
666 crparam2bn(struct crparam *crp, BIGNUM *a)
671 bytes = (crp->crp_nbits + 7) / 8;
676 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
679 for (i = 0; i < bytes; i++)
680 pd[i] = crp->crp_p[bytes - i - 1];
682 BN_bin2bn(pd, bytes, a);
689 zapparams(struct crypt_kop *kop)
693 for (i = 0; i <= kop->crk_iparams + kop->crk_oparams; i++) {
694 if (kop->crk_param[i].crp_p)
695 free(kop->crk_param[i].crp_p);
696 kop->crk_param[i].crp_p = NULL;
697 kop->crk_param[i].crp_nbits = 0;
702 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s)
706 if ((fd = get_asym_dev_crypto()) < 0)
710 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
711 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
715 kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char));
716 kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8;
720 if (ioctl(fd, CIOCKEY, kop) == 0) {
722 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
724 crparam2bn(&kop->crk_param[kop->crk_iparams+1], s);
732 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
733 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
735 struct crypt_kop kop;
738 /* Currently, we know we can do mod exp iff we can do any
739 * asymmetric operations at all.
741 if (cryptodev_asymfeat == 0) {
742 ret = BN_mod_exp(r, a, p, m, ctx);
746 memset(&kop, 0, sizeof kop);
747 kop.crk_op = CRK_MOD_EXP;
749 /* inputs: a^p % m */
750 if (bn2crparam(a, &kop.crk_param[0]))
752 if (bn2crparam(p, &kop.crk_param[1]))
754 if (bn2crparam(m, &kop.crk_param[2]))
758 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL) == -1) {
759 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
760 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
768 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
772 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
777 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
779 struct crypt_kop kop;
782 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
783 /* XXX 0 means failure?? */
787 memset(&kop, 0, sizeof kop);
788 kop.crk_op = CRK_MOD_EXP_CRT;
789 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
790 if (bn2crparam(rsa->p, &kop.crk_param[0]))
792 if (bn2crparam(rsa->q, &kop.crk_param[1]))
794 if (bn2crparam(I, &kop.crk_param[2]))
796 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
798 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
800 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
804 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL) == -1) {
805 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
806 ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
813 static RSA_METHOD cryptodev_rsa = {
814 "cryptodev RSA method",
815 NULL, /* rsa_pub_enc */
816 NULL, /* rsa_pub_dec */
817 NULL, /* rsa_priv_enc */
818 NULL, /* rsa_priv_dec */
826 NULL /* rsa_verify */
830 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
831 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
833 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
837 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
838 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
839 BN_CTX *ctx, BN_MONT_CTX *mont)
846 /* v = ( g^u1 * y^u2 mod p ) mod q */
847 /* let t1 = g ^ u1 mod p */
850 if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont))
853 /* let t2 = y ^ u2 mod p */
854 if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont))
856 /* let u1 = t1 * t2 mod p */
857 if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx))
869 cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
871 struct crypt_kop kop;
872 BIGNUM *r = NULL, *s = NULL;
873 DSA_SIG *dsaret = NULL;
875 if ((r = BN_new()) == NULL)
877 if ((s = BN_new()) == NULL) {
882 memset(&kop, 0, sizeof kop);
883 kop.crk_op = CRK_DSA_SIGN;
885 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
886 kop.crk_param[0].crp_p = (caddr_t)dgst;
887 kop.crk_param[0].crp_nbits = dlen * 8;
888 if (bn2crparam(dsa->p, &kop.crk_param[1]))
890 if (bn2crparam(dsa->q, &kop.crk_param[2]))
892 if (bn2crparam(dsa->g, &kop.crk_param[3]))
894 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
898 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
899 BN_num_bytes(dsa->q), s) == 0) {
900 dsaret = DSA_SIG_new();
904 const DSA_METHOD *meth = DSA_OpenSSL();
907 dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa);
910 kop.crk_param[0].crp_p = NULL;
916 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
917 DSA_SIG *sig, DSA *dsa)
919 struct crypt_kop kop;
922 memset(&kop, 0, sizeof kop);
923 kop.crk_op = CRK_DSA_VERIFY;
925 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
926 kop.crk_param[0].crp_p = (caddr_t)dgst;
927 kop.crk_param[0].crp_nbits = dlen * 8;
928 if (bn2crparam(dsa->p, &kop.crk_param[1]))
930 if (bn2crparam(dsa->q, &kop.crk_param[2]))
932 if (bn2crparam(dsa->g, &kop.crk_param[3]))
934 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
936 if (bn2crparam(sig->r, &kop.crk_param[5]))
938 if (bn2crparam(sig->s, &kop.crk_param[6]))
942 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
943 dsaret = kop.crk_status;
945 const DSA_METHOD *meth = DSA_OpenSSL();
947 dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa);
950 kop.crk_param[0].crp_p = NULL;
955 static DSA_METHOD cryptodev_dsa = {
956 "cryptodev DSA method",
958 NULL, /* dsa_sign_setup */
960 NULL, /* dsa_mod_exp */
969 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
970 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
973 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
977 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
979 struct crypt_kop kop;
983 if ((fd = get_asym_dev_crypto()) < 0) {
984 const DH_METHOD *meth = DH_OpenSSL();
986 return ((meth->compute_key)(key, pub_key, dh));
989 keylen = BN_num_bits(dh->p);
991 memset(&kop, 0, sizeof kop);
992 kop.crk_op = CRK_DH_COMPUTE_KEY;
994 /* inputs: dh->priv_key pub_key dh->p key */
995 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
997 if (bn2crparam(pub_key, &kop.crk_param[1]))
999 if (bn2crparam(dh->p, &kop.crk_param[2]))
1001 kop.crk_iparams = 3;
1003 kop.crk_param[3].crp_p = (char *)key;
1004 kop.crk_param[3].crp_nbits = keylen * 8;
1005 kop.crk_oparams = 1;
1007 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1008 const DH_METHOD *meth = DH_OpenSSL();
1010 dhret = (meth->compute_key)(key, pub_key, dh);
1013 kop.crk_param[3].crp_p = NULL;
1018 static DH_METHOD cryptodev_dh = {
1019 "cryptodev DH method",
1020 NULL, /* cryptodev_dh_generate_key */
1030 * ctrl right now is just a wrapper that doesn't do much
1031 * but I expect we'll want some options soon.
1034 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
1036 #ifdef HAVE_SYSLOG_R
1037 struct syslog_data sd = SYSLOG_DATA_INIT;
1042 #ifdef HAVE_SYSLOG_R
1043 syslog_r(LOG_ERR, &sd,
1044 "cryptodev_ctrl: unknown command %d", cmd);
1046 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1054 ENGINE_load_cryptodev(void)
1056 ENGINE *engine = ENGINE_new();
1061 if ((fd = get_dev_crypto()) < 0) {
1062 ENGINE_free(engine);
1067 * find out what asymmetric crypto algorithms we support
1069 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1071 ENGINE_free(engine);
1076 if (!ENGINE_set_id(engine, "cryptodev") ||
1077 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1078 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1079 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1080 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1081 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1082 ENGINE_free(engine);
1086 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1087 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1089 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1090 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1091 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1092 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1093 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1094 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1095 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1096 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1097 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1098 cryptodev_rsa.rsa_mod_exp =
1099 cryptodev_rsa_mod_exp;
1101 cryptodev_rsa.rsa_mod_exp =
1102 cryptodev_rsa_nocrt_mod_exp;
1106 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1107 const DSA_METHOD *meth = DSA_OpenSSL();
1109 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1110 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1111 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1112 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1113 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1114 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1116 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1117 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1120 if (ENGINE_set_DH(engine, &cryptodev_dh)){
1121 const DH_METHOD *dh_meth = DH_OpenSSL();
1123 cryptodev_dh.generate_key = dh_meth->generate_key;
1124 cryptodev_dh.compute_key = dh_meth->compute_key;
1125 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1126 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1127 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1128 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1129 cryptodev_dh.compute_key =
1130 cryptodev_dh_compute_key;
1135 ENGINE_free(engine);
1139 #endif /* HAVE_CRYPTODEV */