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 #ifndef CRIOGET_NOT_NEEDED
190 if (ioctl(fd, CRIOGET, &retfd) == -1)
194 if (fcntl(retfd, F_SETFD, 1) == -1) {
204 static void put_dev_crypto(int fd)
206 #ifndef CRIOGET_NOT_NEEDED
211 /* Caching version for asym operations */
213 get_asym_dev_crypto(void)
218 fd = get_dev_crypto();
223 * XXXX this needs to be set for each alg - and determined from
227 cryptodev_max_iv(int cipher)
231 for (i = 0; ciphers[i].id; i++)
232 if (ciphers[i].id == cipher)
233 return (ciphers[i].ivmax);
238 * XXXX this needs to be set for each alg - and determined from
239 * a running card. For now, fake it out - but most of these
240 * for real devices should return 1 for the supported key
241 * sizes the device can handle.
244 cryptodev_key_length_valid(int cipher, int len)
248 for (i = 0; ciphers[i].id; i++)
249 if (ciphers[i].id == cipher)
250 return (ciphers[i].keylen == len);
254 /* convert libcrypto nids to cryptodev */
256 cipher_nid_to_cryptodev(int nid)
260 for (i = 0; ciphers[i].id; i++)
261 if (ciphers[i].nid == nid)
262 return (ciphers[i].id);
267 * Find out what ciphers /dev/crypto will let us have a session for.
268 * XXX note, that some of these openssl doesn't deal with yet!
269 * returning them here is harmless, as long as we return NULL
270 * when asked for a handler in the cryptodev_engine_ciphers routine
273 get_cryptodev_ciphers(const int **cnids)
275 static int nids[CRYPTO_ALGORITHM_MAX];
276 struct session_op sess;
277 int fd, i, count = 0;
279 if ((fd = get_dev_crypto()) < 0) {
283 memset(&sess, 0, sizeof(sess));
284 sess.key = (caddr_t)"123456781234567812345678";
286 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
287 if (ciphers[i].nid == NID_undef)
289 sess.cipher = ciphers[i].id;
290 sess.keylen = ciphers[i].keylen;
292 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
293 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
294 nids[count++] = ciphers[i].nid;
307 * Find out what digests /dev/crypto will let us have a session for.
308 * XXX note, that some of these openssl doesn't deal with yet!
309 * returning them here is harmless, as long as we return NULL
310 * when asked for a handler in the cryptodev_engine_digests routine
313 get_cryptodev_digests(const int **cnids)
315 static int nids[CRYPTO_ALGORITHM_MAX];
316 struct session_op sess;
317 int fd, i, count = 0;
319 if ((fd = get_dev_crypto()) < 0) {
323 memset(&sess, 0, sizeof(sess));
324 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
325 if (digests[i].nid == NID_undef)
327 sess.mac = digests[i].id;
329 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
330 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
331 nids[count++] = digests[i].nid;
345 * Find the useable ciphers|digests from dev/crypto - this is the first
346 * thing called by the engine init crud which determines what it
347 * can use for ciphers from this engine. We want to return
348 * only what we can do, anythine else is handled by software.
350 * If we can't initialize the device to do anything useful for
351 * any reason, we want to return a NULL array, and 0 length,
352 * which forces everything to be done is software. By putting
353 * the initalization of the device in here, we ensure we can
354 * use this engine as the default, and if for whatever reason
355 * /dev/crypto won't do what we want it will just be done in
358 * This can (should) be greatly expanded to perhaps take into
359 * account speed of the device, and what we want to do.
360 * (although the disabling of particular alg's could be controlled
361 * by the device driver with sysctl's.) - this is where we
362 * want most of the decisions made about what we actually want
363 * to use from /dev/crypto.
366 cryptodev_usable_ciphers(const int **nids)
368 return (get_cryptodev_ciphers(nids));
372 cryptodev_usable_digests(const int **nids)
375 * XXXX just disable all digests for now, because it sucks.
376 * we need a better way to decide this - i.e. I may not
377 * want digests on slow cards like hifn on fast machines,
378 * but might want them on slow or loaded machines, etc.
379 * will also want them when using crypto cards that don't
380 * suck moose gonads - would be nice to be able to decide something
381 * as reasonable default without having hackery that's card dependent.
382 * of course, the default should probably be just do everything,
383 * with perhaps a sysctl to turn algoritms off (or have them off
384 * by default) on cards that generally suck like the hifn.
391 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
392 const unsigned char *in, unsigned int inl)
394 struct crypt_op cryp;
395 struct dev_crypto_state *state = ctx->cipher_data;
396 struct session_op *sess = &state->d_sess;
398 unsigned char save_iv[EVP_MAX_IV_LENGTH];
404 if ((inl % ctx->cipher->block_size) != 0)
407 memset(&cryp, 0, sizeof(cryp));
409 cryp.ses = sess->ses;
412 cryp.src = (caddr_t) in;
413 cryp.dst = (caddr_t) out;
416 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
418 if (ctx->cipher->iv_len) {
419 cryp.iv = (caddr_t) ctx->iv;
421 iiv = in + inl - ctx->cipher->iv_len;
422 memcpy(save_iv, iiv, ctx->cipher->iv_len);
427 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
428 /* XXX need better errror handling
429 * this can fail for a number of different reasons.
434 if (ctx->cipher->iv_len) {
436 iiv = out + inl - ctx->cipher->iv_len;
439 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
445 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
446 const unsigned char *iv, int enc)
448 struct dev_crypto_state *state = ctx->cipher_data;
449 struct session_op *sess = &state->d_sess;
452 if ((cipher = cipher_nid_to_cryptodev(ctx->cipher->nid)) == NID_undef)
455 if (ctx->cipher->iv_len > cryptodev_max_iv(cipher))
458 if (!cryptodev_key_length_valid(cipher, ctx->key_len))
461 memset(sess, 0, sizeof(struct session_op));
463 if ((state->d_fd = get_dev_crypto()) < 0)
466 sess->key = (char *)key;
467 sess->keylen = ctx->key_len;
468 sess->cipher = cipher;
470 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
471 put_dev_crypto(state->d_fd);
479 * free anything we allocated earlier when initting a
480 * session, and close the session.
483 cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
486 struct dev_crypto_state *state = ctx->cipher_data;
487 struct session_op *sess = &state->d_sess;
492 /* XXX if this ioctl fails, someting's wrong. the invoker
493 * may have called us with a bogus ctx, or we could
494 * have a device that for whatever reason just doesn't
495 * want to play ball - it's not clear what's right
496 * here - should this be an error? should it just
497 * increase a counter, hmm. For right now, we return
498 * 0 - I don't believe that to be "right". we could
499 * call the gorpy openssl lib error handlers that
500 * print messages to users of the library. hmm..
503 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
508 put_dev_crypto(state->d_fd);
515 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
516 * gets called when libcrypto requests a cipher NID.
520 const EVP_CIPHER cryptodev_des_cbc = {
527 sizeof(struct dev_crypto_state),
528 EVP_CIPHER_set_asn1_iv,
529 EVP_CIPHER_get_asn1_iv,
534 const EVP_CIPHER cryptodev_3des_cbc = {
541 sizeof(struct dev_crypto_state),
542 EVP_CIPHER_set_asn1_iv,
543 EVP_CIPHER_get_asn1_iv,
547 const EVP_CIPHER cryptodev_bf_cbc = {
554 sizeof(struct dev_crypto_state),
555 EVP_CIPHER_set_asn1_iv,
556 EVP_CIPHER_get_asn1_iv,
560 const EVP_CIPHER cryptodev_cast_cbc = {
567 sizeof(struct dev_crypto_state),
568 EVP_CIPHER_set_asn1_iv,
569 EVP_CIPHER_get_asn1_iv,
573 const EVP_CIPHER cryptodev_aes_cbc = {
580 sizeof(struct dev_crypto_state),
581 EVP_CIPHER_set_asn1_iv,
582 EVP_CIPHER_get_asn1_iv,
587 * Registered by the ENGINE when used to find out how to deal with
588 * a particular NID in the ENGINE. this says what we'll do at the
589 * top level - note, that list is restricted by what we answer with
592 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
593 const int **nids, int nid)
596 return (cryptodev_usable_ciphers(nids));
599 case NID_des_ede3_cbc:
600 *cipher = &cryptodev_3des_cbc;
603 *cipher = &cryptodev_des_cbc;
606 *cipher = &cryptodev_bf_cbc;
609 *cipher = &cryptodev_cast_cbc;
611 case NID_aes_128_cbc:
612 *cipher = &cryptodev_aes_cbc;
618 return (*cipher != NULL);
622 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
623 const int **nids, int nid)
626 return (cryptodev_usable_digests(nids));
630 *digest = NULL; /* need to make a clean md5 critter */
636 return (*digest != NULL);
640 * Convert a BIGNUM to the representation that /dev/crypto needs.
641 * Upon completion of use, the caller is responsible for freeing
645 bn2crparam(const BIGNUM *a, struct crparam *crp)
654 bits = BN_num_bits(a);
655 bytes = (bits + 7) / 8;
661 crp->crp_p = (char *)b;
662 crp->crp_nbits = bits;
664 for (i = 0, j = 0; i < a->top; i++) {
665 for (k = 0; k < BN_BITS2 / 8; k++) {
666 if ((j + k) >= bytes)
668 b[j + k] = a->d[i] >> (k * 8);
675 /* Convert a /dev/crypto parameter to a BIGNUM */
677 crparam2bn(struct crparam *crp, BIGNUM *a)
682 bytes = (crp->crp_nbits + 7) / 8;
687 if ((pd = (u_int8_t *) malloc(bytes)) == NULL)
690 for (i = 0; i < bytes; i++)
691 pd[i] = crp->crp_p[bytes - i - 1];
693 BN_bin2bn(pd, bytes, a);
700 zapparams(struct crypt_kop *kop)
704 for (i = 0; i <= kop->crk_iparams + kop->crk_oparams; i++) {
705 if (kop->crk_param[i].crp_p)
706 free(kop->crk_param[i].crp_p);
707 kop->crk_param[i].crp_p = NULL;
708 kop->crk_param[i].crp_nbits = 0;
713 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s)
717 if ((fd = get_asym_dev_crypto()) < 0)
721 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
722 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
726 kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char));
727 kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8;
731 if (ioctl(fd, CIOCKEY, kop) == 0) {
733 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
735 crparam2bn(&kop->crk_param[kop->crk_iparams+1], s);
743 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
744 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
746 struct crypt_kop kop;
749 /* Currently, we know we can do mod exp iff we can do any
750 * asymmetric operations at all.
752 if (cryptodev_asymfeat == 0) {
753 ret = BN_mod_exp(r, a, p, m, ctx);
757 memset(&kop, 0, sizeof kop);
758 kop.crk_op = CRK_MOD_EXP;
760 /* inputs: a^p % m */
761 if (bn2crparam(a, &kop.crk_param[0]))
763 if (bn2crparam(p, &kop.crk_param[1]))
765 if (bn2crparam(m, &kop.crk_param[2]))
769 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL)) {
770 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
771 printf("OCF asym process failed, Running in software\n");
772 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
774 } else if (ECANCELED == kop.crk_status) {
775 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
776 printf("OCF hardware operation cancelled. Running in Software\n");
777 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
779 /* else cryptodev operation worked ok ==> ret = 1*/
787 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
791 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
796 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
798 struct crypt_kop kop;
801 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
802 /* XXX 0 means failure?? */
806 memset(&kop, 0, sizeof kop);
807 kop.crk_op = CRK_MOD_EXP_CRT;
808 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
809 if (bn2crparam(rsa->p, &kop.crk_param[0]))
811 if (bn2crparam(rsa->q, &kop.crk_param[1]))
813 if (bn2crparam(I, &kop.crk_param[2]))
815 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
817 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
819 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
823 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL)) {
824 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
825 printf("OCF asym process failed, running in Software\n");
826 ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
828 } else if (ECANCELED == kop.crk_status) {
829 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
830 printf("OCF hardware operation cancelled. Running in Software\n");
831 ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
833 /* else cryptodev operation worked ok ==> ret = 1*/
840 static RSA_METHOD cryptodev_rsa = {
841 "cryptodev RSA method",
842 NULL, /* rsa_pub_enc */
843 NULL, /* rsa_pub_dec */
844 NULL, /* rsa_priv_enc */
845 NULL, /* rsa_priv_dec */
853 NULL /* rsa_verify */
857 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
858 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
860 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
864 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
865 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
866 BN_CTX *ctx, BN_MONT_CTX *mont)
873 /* v = ( g^u1 * y^u2 mod p ) mod q */
874 /* let t1 = g ^ u1 mod p */
877 if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont))
880 /* let t2 = y ^ u2 mod p */
881 if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont))
883 /* let u1 = t1 * t2 mod p */
884 if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx))
896 cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
898 struct crypt_kop kop;
899 BIGNUM *r = NULL, *s = NULL;
900 DSA_SIG *dsaret = NULL;
902 if ((r = BN_new()) == NULL)
904 if ((s = BN_new()) == NULL) {
909 memset(&kop, 0, sizeof kop);
910 kop.crk_op = CRK_DSA_SIGN;
912 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
913 kop.crk_param[0].crp_p = (caddr_t)dgst;
914 kop.crk_param[0].crp_nbits = dlen * 8;
915 if (bn2crparam(dsa->p, &kop.crk_param[1]))
917 if (bn2crparam(dsa->q, &kop.crk_param[2]))
919 if (bn2crparam(dsa->g, &kop.crk_param[3]))
921 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
925 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
926 BN_num_bytes(dsa->q), s) == 0) {
927 dsaret = DSA_SIG_new();
931 const DSA_METHOD *meth = DSA_OpenSSL();
934 dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa);
937 kop.crk_param[0].crp_p = NULL;
943 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
944 DSA_SIG *sig, DSA *dsa)
946 struct crypt_kop kop;
949 memset(&kop, 0, sizeof kop);
950 kop.crk_op = CRK_DSA_VERIFY;
952 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
953 kop.crk_param[0].crp_p = (caddr_t)dgst;
954 kop.crk_param[0].crp_nbits = dlen * 8;
955 if (bn2crparam(dsa->p, &kop.crk_param[1]))
957 if (bn2crparam(dsa->q, &kop.crk_param[2]))
959 if (bn2crparam(dsa->g, &kop.crk_param[3]))
961 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
963 if (bn2crparam(sig->r, &kop.crk_param[5]))
965 if (bn2crparam(sig->s, &kop.crk_param[6]))
969 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
970 /*OCF success value is 0, if not zero, change dsaret to fail*/
971 if(0 != kop.crk_status) dsaret = 0;
973 const DSA_METHOD *meth = DSA_OpenSSL();
975 dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa);
978 kop.crk_param[0].crp_p = NULL;
983 static DSA_METHOD cryptodev_dsa = {
984 "cryptodev DSA method",
986 NULL, /* dsa_sign_setup */
988 NULL, /* dsa_mod_exp */
997 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
998 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
1001 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1005 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
1007 struct crypt_kop kop;
1011 if ((fd = get_asym_dev_crypto()) < 0) {
1012 const DH_METHOD *meth = DH_OpenSSL();
1014 return ((meth->compute_key)(key, pub_key, dh));
1017 keylen = BN_num_bits(dh->p);
1019 memset(&kop, 0, sizeof kop);
1020 kop.crk_op = CRK_DH_COMPUTE_KEY;
1022 /* inputs: dh->priv_key pub_key dh->p key */
1023 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
1025 if (bn2crparam(pub_key, &kop.crk_param[1]))
1027 if (bn2crparam(dh->p, &kop.crk_param[2]))
1029 kop.crk_iparams = 3;
1031 kop.crk_param[3].crp_p = (char *)key;
1032 kop.crk_param[3].crp_nbits = keylen * 8;
1033 kop.crk_oparams = 1;
1035 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1036 const DH_METHOD *meth = DH_OpenSSL();
1038 dhret = (meth->compute_key)(key, pub_key, dh);
1041 kop.crk_param[3].crp_p = NULL;
1046 static DH_METHOD cryptodev_dh = {
1047 "cryptodev DH method",
1048 NULL, /* cryptodev_dh_generate_key */
1058 * ctrl right now is just a wrapper that doesn't do much
1059 * but I expect we'll want some options soon.
1062 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
1064 #ifdef HAVE_SYSLOG_R
1065 struct syslog_data sd = SYSLOG_DATA_INIT;
1070 #ifdef HAVE_SYSLOG_R
1071 syslog_r(LOG_ERR, &sd,
1072 "cryptodev_ctrl: unknown command %d", cmd);
1074 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1082 ENGINE_load_cryptodev(void)
1084 ENGINE *engine = ENGINE_new();
1089 if ((fd = get_dev_crypto()) < 0) {
1090 ENGINE_free(engine);
1095 * find out what asymmetric crypto algorithms we support
1097 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1099 ENGINE_free(engine);
1104 if (!ENGINE_set_id(engine, "cryptodev") ||
1105 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1106 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1107 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1108 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1109 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1110 ENGINE_free(engine);
1114 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1115 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1117 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1118 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1119 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1120 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1121 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1122 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1123 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1124 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1125 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1126 cryptodev_rsa.rsa_mod_exp =
1127 cryptodev_rsa_mod_exp;
1129 cryptodev_rsa.rsa_mod_exp =
1130 cryptodev_rsa_nocrt_mod_exp;
1134 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1135 const DSA_METHOD *meth = DSA_OpenSSL();
1137 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1138 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1139 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1140 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1141 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1142 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1144 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1145 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1148 if (ENGINE_set_DH(engine, &cryptodev_dh)){
1149 const DH_METHOD *dh_meth = DH_OpenSSL();
1151 cryptodev_dh.generate_key = dh_meth->generate_key;
1152 cryptodev_dh.compute_key = dh_meth->compute_key;
1153 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1154 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1155 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1156 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1157 cryptodev_dh.compute_key =
1158 cryptodev_dh_compute_key;
1163 ENGINE_free(engine);
1167 #endif /* HAVE_CRYPTODEV */