2 * Copyright (c) 2002 Bob Beck <beck@openbsd.org>
3 * Copyright (c) 2002 Theo de Raadt
4 * Copyright (c) 2002 Markus Friedl
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <openssl/objects.h>
30 #include <openssl/engine.h>
31 #include <openssl/evp.h>
32 #include <openssl/bn.h>
34 #if (defined(__unix__) || defined(unix)) && !defined(USG) && \
35 (defined(OpenBSD) || defined(__FreeBSD__))
36 # include <sys/param.h>
37 # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041)
38 # define HAVE_CRYPTODEV
40 # if (OpenBSD >= 200110)
41 # define HAVE_SYSLOG_R
45 #include <sys/types.h>
47 # include <crypto/cryptodev.h>
49 #include <openssl/dh.h>
50 #include <openssl/dsa.h>
51 #include <openssl/err.h>
52 #include <openssl/rsa.h>
53 #include <sys/ioctl.h>
63 #ifndef HAVE_CRYPTODEV
65 void ENGINE_load_cryptodev(void)
67 /* This is a NOP on platforms without /dev/crypto */
73 struct dev_crypto_state {
74 struct session_op d_sess;
76 # ifdef USE_CRYPTODEV_DIGESTS
77 char dummy_mac_key[HASH_MAX_LEN];
78 unsigned char digest_res[HASH_MAX_LEN];
84 static u_int32_t cryptodev_asymfeat = 0;
86 static int get_asym_dev_crypto(void);
87 static int open_dev_crypto(void);
88 static int get_dev_crypto(void);
89 static int get_cryptodev_ciphers(const int **cnids);
90 # ifdef USE_CRYPTODEV_DIGESTS
91 static int get_cryptodev_digests(const int **cnids);
93 static int cryptodev_usable_ciphers(const int **nids);
94 static int cryptodev_usable_digests(const int **nids);
95 static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
96 const unsigned char *in, size_t inl);
97 static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
98 const unsigned char *iv, int enc);
99 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx);
100 static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
101 const int **nids, int nid);
102 static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
103 const int **nids, int nid);
104 static int bn2crparam(const BIGNUM *a, struct crparam *crp);
105 static int crparam2bn(struct crparam *crp, BIGNUM *a);
106 static void zapparams(struct crypt_kop *kop);
107 static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r,
108 int slen, BIGNUM *s);
110 static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a,
111 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
113 static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
115 static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
117 static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a,
118 const BIGNUM *p, const BIGNUM *m,
119 BN_CTX *ctx, BN_MONT_CTX *m_ctx);
120 static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
121 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2,
122 BIGNUM *p, BN_CTX *ctx,
124 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen,
126 static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len,
127 DSA_SIG *sig, DSA *dsa);
128 static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
129 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
131 static int cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key,
133 static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p,
135 void ENGINE_load_cryptodev(void);
137 static const ENGINE_CMD_DEFN cryptodev_defns[] = {
148 CRYPTO_ARC4, NID_rc4, 0, 16,
151 CRYPTO_DES_CBC, NID_des_cbc, 8, 8,
154 CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24,
157 CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16,
160 CRYPTO_AES_CBC, NID_aes_192_cbc, 16, 24,
163 CRYPTO_AES_CBC, NID_aes_256_cbc, 16, 32,
165 # ifdef CRYPTO_AES_CTR
167 CRYPTO_AES_CTR, NID_aes_128_ctr, 14, 16,
170 CRYPTO_AES_CTR, NID_aes_192_ctr, 14, 24,
173 CRYPTO_AES_CTR, NID_aes_256_ctr, 14, 32,
177 CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16,
180 CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16,
183 CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0,
190 # ifdef USE_CRYPTODEV_DIGESTS
197 CRYPTO_MD5_HMAC, NID_hmacWithMD5, 16
200 CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, 20
203 CRYPTO_RIPEMD160_HMAC, NID_ripemd160, 16
207 CRYPTO_MD5_KPDK, NID_undef, 0
210 CRYPTO_SHA1_KPDK, NID_undef, 0
213 CRYPTO_MD5, NID_md5, 16
216 CRYPTO_SHA1, NID_sha1, 20
225 * Return a fd if /dev/crypto seems usable, 0 otherwise.
227 static int open_dev_crypto(void)
232 if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1)
235 if (fcntl(fd, F_SETFD, 1) == -1) {
244 static int get_dev_crypto(void)
248 if ((fd = open_dev_crypto()) == -1)
250 # ifndef CRIOGET_NOT_NEEDED
251 if (ioctl(fd, CRIOGET, &retfd) == -1)
255 if (fcntl(retfd, F_SETFD, 1) == -1) {
265 static void put_dev_crypto(int fd)
267 # ifndef CRIOGET_NOT_NEEDED
272 /* Caching version for asym operations */
273 static int get_asym_dev_crypto(void)
278 fd = get_dev_crypto();
283 * Find out what ciphers /dev/crypto will let us have a session for.
284 * XXX note, that some of these openssl doesn't deal with yet!
285 * returning them here is harmless, as long as we return NULL
286 * when asked for a handler in the cryptodev_engine_ciphers routine
288 static int get_cryptodev_ciphers(const int **cnids)
290 static int nids[CRYPTO_ALGORITHM_MAX];
291 struct session_op sess;
292 int fd, i, count = 0;
294 if ((fd = get_dev_crypto()) < 0) {
298 memset(&sess, 0, sizeof(sess));
299 sess.key = (caddr_t) "123456789abcdefghijklmno";
301 for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
302 if (ciphers[i].nid == NID_undef)
304 sess.cipher = ciphers[i].id;
305 sess.keylen = ciphers[i].keylen;
307 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
308 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
309 nids[count++] = ciphers[i].nid;
320 # ifdef USE_CRYPTODEV_DIGESTS
322 * Find out what digests /dev/crypto will let us have a session for.
323 * XXX note, that some of these openssl doesn't deal with yet!
324 * returning them here is harmless, as long as we return NULL
325 * when asked for a handler in the cryptodev_engine_digests routine
327 static int get_cryptodev_digests(const int **cnids)
329 static int nids[CRYPTO_ALGORITHM_MAX];
330 struct session_op sess;
331 int fd, i, count = 0;
333 if ((fd = get_dev_crypto()) < 0) {
337 memset(&sess, 0, sizeof(sess));
338 sess.mackey = (caddr_t) "123456789abcdefghijklmno";
339 for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) {
340 if (digests[i].nid == NID_undef)
342 sess.mac = digests[i].id;
343 sess.mackeylen = digests[i].keylen;
345 if (ioctl(fd, CIOCGSESSION, &sess) != -1 &&
346 ioctl(fd, CIOCFSESSION, &sess.ses) != -1)
347 nids[count++] = digests[i].nid;
360 * Find the useable ciphers|digests from dev/crypto - this is the first
361 * thing called by the engine init crud which determines what it
362 * can use for ciphers from this engine. We want to return
363 * only what we can do, anythine else is handled by software.
365 * If we can't initialize the device to do anything useful for
366 * any reason, we want to return a NULL array, and 0 length,
367 * which forces everything to be done is software. By putting
368 * the initalization of the device in here, we ensure we can
369 * use this engine as the default, and if for whatever reason
370 * /dev/crypto won't do what we want it will just be done in
373 * This can (should) be greatly expanded to perhaps take into
374 * account speed of the device, and what we want to do.
375 * (although the disabling of particular alg's could be controlled
376 * by the device driver with sysctl's.) - this is where we
377 * want most of the decisions made about what we actually want
378 * to use from /dev/crypto.
380 static int cryptodev_usable_ciphers(const int **nids)
382 return (get_cryptodev_ciphers(nids));
385 static int cryptodev_usable_digests(const int **nids)
387 # ifdef USE_CRYPTODEV_DIGESTS
388 return (get_cryptodev_digests(nids));
391 * XXXX just disable all digests for now, because it sucks.
392 * we need a better way to decide this - i.e. I may not
393 * want digests on slow cards like hifn on fast machines,
394 * but might want them on slow or loaded machines, etc.
395 * will also want them when using crypto cards that don't
396 * suck moose gonads - would be nice to be able to decide something
397 * as reasonable default without having hackery that's card dependent.
398 * of course, the default should probably be just do everything,
399 * with perhaps a sysctl to turn algoritms off (or have them off
400 * by default) on cards that generally suck like the hifn.
408 cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
409 const unsigned char *in, size_t inl)
411 struct crypt_op cryp;
412 struct dev_crypto_state *state = ctx->cipher_data;
413 struct session_op *sess = &state->d_sess;
415 unsigned char save_iv[EVP_MAX_IV_LENGTH];
421 if ((inl % ctx->cipher->block_size) != 0)
424 memset(&cryp, 0, sizeof(cryp));
426 cryp.ses = sess->ses;
429 cryp.src = (caddr_t) in;
430 cryp.dst = (caddr_t) out;
433 cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
435 if (ctx->cipher->iv_len) {
436 cryp.iv = (caddr_t) ctx->iv;
438 iiv = in + inl - ctx->cipher->iv_len;
439 memcpy(save_iv, iiv, ctx->cipher->iv_len);
444 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) {
446 * XXX need better errror handling this can fail for a number of
452 if (ctx->cipher->iv_len) {
454 iiv = out + inl - ctx->cipher->iv_len;
457 memcpy(ctx->iv, iiv, ctx->cipher->iv_len);
463 cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
464 const unsigned char *iv, int enc)
466 struct dev_crypto_state *state = ctx->cipher_data;
467 struct session_op *sess = &state->d_sess;
470 for (i = 0; ciphers[i].id; i++)
471 if (ctx->cipher->nid == ciphers[i].nid &&
472 ctx->cipher->iv_len <= ciphers[i].ivmax &&
473 ctx->key_len == ciphers[i].keylen) {
474 cipher = ciphers[i].id;
478 if (!ciphers[i].id) {
483 memset(sess, 0, sizeof(*sess));
485 if ((state->d_fd = get_dev_crypto()) < 0)
488 sess->key = (caddr_t) key;
489 sess->keylen = ctx->key_len;
490 sess->cipher = cipher;
492 if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) {
493 put_dev_crypto(state->d_fd);
501 * free anything we allocated earlier when initting a
502 * session, and close the session.
504 static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx)
507 struct dev_crypto_state *state = ctx->cipher_data;
508 struct session_op *sess = &state->d_sess;
514 * XXX if this ioctl fails, someting's wrong. the invoker may have called
515 * us with a bogus ctx, or we could have a device that for whatever
516 * reason just doesn't want to play ball - it's not clear what's right
517 * here - should this be an error? should it just increase a counter,
518 * hmm. For right now, we return 0 - I don't believe that to be "right".
519 * we could call the gorpy openssl lib error handlers that print messages
520 * to users of the library. hmm..
523 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) {
528 put_dev_crypto(state->d_fd);
535 * libcrypto EVP stuff - this is how we get wired to EVP so the engine
536 * gets called when libcrypto requests a cipher NID.
540 static const EVP_CIPHER cryptodev_rc4 = {
543 EVP_CIPH_VARIABLE_LENGTH,
547 sizeof(struct dev_crypto_state),
554 static const EVP_CIPHER cryptodev_des_cbc = {
561 sizeof(struct dev_crypto_state),
562 EVP_CIPHER_set_asn1_iv,
563 EVP_CIPHER_get_asn1_iv,
568 static const EVP_CIPHER cryptodev_3des_cbc = {
575 sizeof(struct dev_crypto_state),
576 EVP_CIPHER_set_asn1_iv,
577 EVP_CIPHER_get_asn1_iv,
581 static const EVP_CIPHER cryptodev_bf_cbc = {
588 sizeof(struct dev_crypto_state),
589 EVP_CIPHER_set_asn1_iv,
590 EVP_CIPHER_get_asn1_iv,
594 static const EVP_CIPHER cryptodev_cast_cbc = {
601 sizeof(struct dev_crypto_state),
602 EVP_CIPHER_set_asn1_iv,
603 EVP_CIPHER_get_asn1_iv,
607 static const EVP_CIPHER cryptodev_aes_cbc = {
614 sizeof(struct dev_crypto_state),
615 EVP_CIPHER_set_asn1_iv,
616 EVP_CIPHER_get_asn1_iv,
620 static const EVP_CIPHER cryptodev_aes_192_cbc = {
627 sizeof(struct dev_crypto_state),
628 EVP_CIPHER_set_asn1_iv,
629 EVP_CIPHER_get_asn1_iv,
633 static const EVP_CIPHER cryptodev_aes_256_cbc = {
640 sizeof(struct dev_crypto_state),
641 EVP_CIPHER_set_asn1_iv,
642 EVP_CIPHER_get_asn1_iv,
646 # ifdef CRYPTO_AES_CTR
647 const EVP_CIPHER cryptodev_aes_ctr = {
654 sizeof(struct dev_crypto_state),
655 EVP_CIPHER_set_asn1_iv,
656 EVP_CIPHER_get_asn1_iv,
660 const EVP_CIPHER cryptodev_aes_ctr_192 = {
667 sizeof(struct dev_crypto_state),
668 EVP_CIPHER_set_asn1_iv,
669 EVP_CIPHER_get_asn1_iv,
673 const EVP_CIPHER cryptodev_aes_ctr_256 = {
680 sizeof(struct dev_crypto_state),
681 EVP_CIPHER_set_asn1_iv,
682 EVP_CIPHER_get_asn1_iv,
687 * Registered by the ENGINE when used to find out how to deal with
688 * a particular NID in the ENGINE. this says what we'll do at the
689 * top level - note, that list is restricted by what we answer with
692 cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
693 const int **nids, int nid)
696 return (cryptodev_usable_ciphers(nids));
700 *cipher = &cryptodev_rc4;
702 case NID_des_ede3_cbc:
703 *cipher = &cryptodev_3des_cbc;
706 *cipher = &cryptodev_des_cbc;
709 *cipher = &cryptodev_bf_cbc;
712 *cipher = &cryptodev_cast_cbc;
714 case NID_aes_128_cbc:
715 *cipher = &cryptodev_aes_cbc;
717 case NID_aes_192_cbc:
718 *cipher = &cryptodev_aes_192_cbc;
720 case NID_aes_256_cbc:
721 *cipher = &cryptodev_aes_256_cbc;
723 # ifdef CRYPTO_AES_CTR
724 case NID_aes_128_ctr:
725 *cipher = &cryptodev_aes_ctr;
727 case NID_aes_192_ctr:
728 *cipher = &cryptodev_aes_ctr_192;
730 case NID_aes_256_ctr:
731 *cipher = &cryptodev_aes_ctr_256;
738 return (*cipher != NULL);
741 # ifdef USE_CRYPTODEV_DIGESTS
743 /* convert digest type to cryptodev */
744 static int digest_nid_to_cryptodev(int nid)
748 for (i = 0; digests[i].id; i++)
749 if (digests[i].nid == nid)
750 return (digests[i].id);
754 static int digest_key_length(int nid)
758 for (i = 0; digests[i].id; i++)
759 if (digests[i].nid == nid)
760 return digests[i].keylen;
764 static int cryptodev_digest_init(EVP_MD_CTX *ctx)
766 struct dev_crypto_state *state = ctx->md_data;
767 struct session_op *sess = &state->d_sess;
770 if ((digest = digest_nid_to_cryptodev(ctx->digest->type)) == NID_undef) {
771 printf("cryptodev_digest_init: Can't get digest \n");
775 memset(state, 0, sizeof(*state));
777 if ((state->d_fd = get_dev_crypto()) < 0) {
778 printf("cryptodev_digest_init: Can't get Dev \n");
782 sess->mackey = state->dummy_mac_key;
783 sess->mackeylen = digest_key_length(ctx->digest->type);
786 if (ioctl(state->d_fd, CIOCGSESSION, sess) < 0) {
787 put_dev_crypto(state->d_fd);
789 printf("cryptodev_digest_init: Open session failed\n");
796 static int cryptodev_digest_update(EVP_MD_CTX *ctx, const void *data,
799 struct crypt_op cryp;
800 struct dev_crypto_state *state = ctx->md_data;
801 struct session_op *sess = &state->d_sess;
804 if (!data || state->d_fd < 0) {
805 printf("cryptodev_digest_update: illegal inputs \n");
813 if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) {
814 /* if application doesn't support one buffer */
816 OPENSSL_realloc(state->mac_data, state->mac_len + count);
819 printf("cryptodev_digest_update: realloc failed\n");
822 state->mac_data = new_mac_data;
824 memcpy(state->mac_data + state->mac_len, data, count);
825 state->mac_len += count;
830 memset(&cryp, 0, sizeof(cryp));
832 cryp.ses = sess->ses;
835 cryp.src = (caddr_t) data;
837 cryp.mac = (caddr_t) state->digest_res;
838 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) {
839 printf("cryptodev_digest_update: digest failed\n");
845 static int cryptodev_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
847 struct crypt_op cryp;
848 struct dev_crypto_state *state = ctx->md_data;
849 struct session_op *sess = &state->d_sess;
853 if (!md || state->d_fd < 0) {
854 printf("cryptodev_digest_final: illegal input\n");
858 if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) {
859 /* if application doesn't support one buffer */
860 memset(&cryp, 0, sizeof(cryp));
861 cryp.ses = sess->ses;
863 cryp.len = state->mac_len;
864 cryp.src = state->mac_data;
866 cryp.mac = (caddr_t) md;
867 if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) {
868 printf("cryptodev_digest_final: digest failed\n");
875 memcpy(md, state->digest_res, ctx->digest->md_size);
880 static int cryptodev_digest_cleanup(EVP_MD_CTX *ctx)
883 struct dev_crypto_state *state = ctx->md_data;
884 struct session_op *sess = &state->d_sess;
889 if (state->d_fd < 0) {
890 printf("cryptodev_digest_cleanup: illegal input\n");
894 OPENSSL_free(state->mac_data);
895 state->mac_data = NULL;
898 if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) < 0) {
899 printf("cryptodev_digest_cleanup: failed to close session\n");
904 put_dev_crypto(state->d_fd);
910 static int cryptodev_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
912 struct dev_crypto_state *fstate = from->md_data;
913 struct dev_crypto_state *dstate = to->md_data;
914 struct session_op *sess;
917 if (dstate == NULL || fstate == NULL)
920 memcpy(dstate, fstate, sizeof(struct dev_crypto_state));
922 sess = &dstate->d_sess;
924 digest = digest_nid_to_cryptodev(to->digest->type);
926 sess->mackey = dstate->dummy_mac_key;
927 sess->mackeylen = digest_key_length(to->digest->type);
930 dstate->d_fd = get_dev_crypto();
932 if (ioctl(dstate->d_fd, CIOCGSESSION, sess) < 0) {
933 put_dev_crypto(dstate->d_fd);
935 printf("cryptodev_digest_copy: Open session failed\n");
939 if (fstate->mac_len != 0) {
940 if (fstate->mac_data != NULL) {
941 dstate->mac_data = OPENSSL_malloc(fstate->mac_len);
942 if (dstate->mac_data == NULL) {
943 printf("cryptodev_digest_copy: mac_data allocation failed\n");
946 memcpy(dstate->mac_data, fstate->mac_data, fstate->mac_len);
947 dstate->mac_len = fstate->mac_len;
954 const EVP_MD cryptodev_sha1 = {
959 cryptodev_digest_init,
960 cryptodev_digest_update,
961 cryptodev_digest_final,
962 cryptodev_digest_copy,
963 cryptodev_digest_cleanup,
964 EVP_PKEY_NULL_method,
966 sizeof(struct dev_crypto_state),
969 const EVP_MD cryptodev_md5 = {
972 16 /* MD5_DIGEST_LENGTH */ ,
974 cryptodev_digest_init,
975 cryptodev_digest_update,
976 cryptodev_digest_final,
977 cryptodev_digest_copy,
978 cryptodev_digest_cleanup,
979 EVP_PKEY_NULL_method,
980 64 /* MD5_CBLOCK */ ,
981 sizeof(struct dev_crypto_state),
984 # endif /* USE_CRYPTODEV_DIGESTS */
987 cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest,
988 const int **nids, int nid)
991 return (cryptodev_usable_digests(nids));
994 # ifdef USE_CRYPTODEV_DIGESTS
996 *digest = &cryptodev_md5;
999 *digest = &cryptodev_sha1;
1002 # endif /* USE_CRYPTODEV_DIGESTS */
1006 return (*digest != NULL);
1010 * Convert a BIGNUM to the representation that /dev/crypto needs.
1011 * Upon completion of use, the caller is responsible for freeing
1014 static int bn2crparam(const BIGNUM *a, struct crparam *crp)
1016 ssize_t bytes, bits;
1022 bits = BN_num_bits(a);
1023 bytes = BN_num_bytes(a);
1025 b = OPENSSL_zalloc(bytes);
1029 crp->crp_p = (caddr_t) b;
1030 crp->crp_nbits = bits;
1036 /* Convert a /dev/crypto parameter to a BIGNUM */
1037 static int crparam2bn(struct crparam *crp, BIGNUM *a)
1042 bytes = (crp->crp_nbits + 7) / 8;
1047 if ((pd = OPENSSL_malloc(bytes)) == NULL)
1050 for (i = 0; i < bytes; i++)
1051 pd[i] = crp->crp_p[bytes - i - 1];
1053 BN_bin2bn(pd, bytes, a);
1059 static void zapparams(struct crypt_kop *kop)
1063 for (i = 0; i < kop->crk_iparams + kop->crk_oparams; i++) {
1064 if (kop->crk_param[i].crp_p)
1065 free(kop->crk_param[i].crp_p);
1066 kop->crk_param[i].crp_p = NULL;
1067 kop->crk_param[i].crp_nbits = 0;
1072 cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen,
1077 if ((fd = get_asym_dev_crypto()) < 0)
1081 kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char));
1082 kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8;
1086 kop->crk_param[kop->crk_iparams + 1].crp_p =
1087 calloc(slen, sizeof(char));
1088 kop->crk_param[kop->crk_iparams + 1].crp_nbits = slen * 8;
1092 if (ioctl(fd, CIOCKEY, kop) == 0) {
1094 crparam2bn(&kop->crk_param[kop->crk_iparams], r);
1096 crparam2bn(&kop->crk_param[kop->crk_iparams + 1], s);
1104 cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
1105 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
1107 struct crypt_kop kop;
1111 * Currently, we know we can do mod exp iff we can do any asymmetric
1112 * operations at all.
1114 if (cryptodev_asymfeat == 0) {
1115 ret = BN_mod_exp(r, a, p, m, ctx);
1119 memset(&kop, 0, sizeof(kop));
1120 kop.crk_op = CRK_MOD_EXP;
1122 /* inputs: a^p % m */
1123 if (bn2crparam(a, &kop.crk_param[0]))
1125 if (bn2crparam(p, &kop.crk_param[1]))
1127 if (bn2crparam(m, &kop.crk_param[2]))
1129 kop.crk_iparams = 3;
1131 if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL)) {
1132 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1133 printf("OCF asym process failed, Running in software\n");
1134 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
1136 } else if (ECANCELED == kop.crk_status) {
1137 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1138 printf("OCF hardware operation cancelled. Running in Software\n");
1139 ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont);
1141 /* else cryptodev operation worked ok ==> ret = 1 */
1149 cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
1154 r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL);
1160 cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
1162 struct crypt_kop kop;
1165 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
1166 /* XXX 0 means failure?? */
1170 memset(&kop, 0, sizeof(kop));
1171 kop.crk_op = CRK_MOD_EXP_CRT;
1172 /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */
1173 if (bn2crparam(rsa->p, &kop.crk_param[0]))
1175 if (bn2crparam(rsa->q, &kop.crk_param[1]))
1177 if (bn2crparam(I, &kop.crk_param[2]))
1179 if (bn2crparam(rsa->dmp1, &kop.crk_param[3]))
1181 if (bn2crparam(rsa->dmq1, &kop.crk_param[4]))
1183 if (bn2crparam(rsa->iqmp, &kop.crk_param[5]))
1185 kop.crk_iparams = 6;
1187 if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL)) {
1188 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1189 printf("OCF asym process failed, running in Software\n");
1190 ret = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
1192 } else if (ECANCELED == kop.crk_status) {
1193 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
1194 printf("OCF hardware operation cancelled. Running in Software\n");
1195 ret = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
1197 /* else cryptodev operation worked ok ==> ret = 1 */
1204 static RSA_METHOD cryptodev_rsa = {
1205 "cryptodev RSA method",
1206 NULL, /* rsa_pub_enc */
1207 NULL, /* rsa_pub_dec */
1208 NULL, /* rsa_priv_enc */
1209 NULL, /* rsa_priv_dec */
1215 NULL, /* app_data */
1216 NULL, /* rsa_sign */
1217 NULL /* rsa_verify */
1221 cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
1222 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
1224 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1228 cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g,
1229 BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p,
1230 BN_CTX *ctx, BN_MONT_CTX *mont)
1237 /* v = ( g^u1 * y^u2 mod p ) mod q */
1238 /* let t1 = g ^ u1 mod p */
1241 if (!dsa->meth->bn_mod_exp(dsa, t1, dsa->g, u1, dsa->p, ctx, mont))
1244 /* let t2 = y ^ u2 mod p */
1245 if (!dsa->meth->bn_mod_exp(dsa, t2, dsa->pub_key, u2, dsa->p, ctx, mont))
1247 /* let u1 = t1 * t2 mod p */
1248 if (!BN_mod_mul(u1, t1, t2, dsa->p, ctx))
1259 static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen,
1262 struct crypt_kop kop;
1263 BIGNUM *r = NULL, *s = NULL;
1264 DSA_SIG *dsaret = NULL;
1266 if ((r = BN_new()) == NULL)
1268 if ((s = BN_new()) == NULL) {
1273 memset(&kop, 0, sizeof(kop));
1274 kop.crk_op = CRK_DSA_SIGN;
1276 /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */
1277 kop.crk_param[0].crp_p = (caddr_t) dgst;
1278 kop.crk_param[0].crp_nbits = dlen * 8;
1279 if (bn2crparam(dsa->p, &kop.crk_param[1]))
1281 if (bn2crparam(dsa->q, &kop.crk_param[2]))
1283 if (bn2crparam(dsa->g, &kop.crk_param[3]))
1285 if (bn2crparam(dsa->priv_key, &kop.crk_param[4]))
1287 kop.crk_iparams = 5;
1289 if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r,
1290 BN_num_bytes(dsa->q), s) == 0) {
1291 dsaret = DSA_SIG_new();
1295 const DSA_METHOD *meth = DSA_OpenSSL();
1298 dsaret = (meth->dsa_do_sign) (dgst, dlen, dsa);
1301 kop.crk_param[0].crp_p = NULL;
1307 cryptodev_dsa_verify(const unsigned char *dgst, int dlen,
1308 DSA_SIG *sig, DSA *dsa)
1310 struct crypt_kop kop;
1313 memset(&kop, 0, sizeof(kop));
1314 kop.crk_op = CRK_DSA_VERIFY;
1316 /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */
1317 kop.crk_param[0].crp_p = (caddr_t) dgst;
1318 kop.crk_param[0].crp_nbits = dlen * 8;
1319 if (bn2crparam(dsa->p, &kop.crk_param[1]))
1321 if (bn2crparam(dsa->q, &kop.crk_param[2]))
1323 if (bn2crparam(dsa->g, &kop.crk_param[3]))
1325 if (bn2crparam(dsa->pub_key, &kop.crk_param[4]))
1327 if (bn2crparam(sig->r, &kop.crk_param[5]))
1329 if (bn2crparam(sig->s, &kop.crk_param[6]))
1331 kop.crk_iparams = 7;
1333 if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) {
1335 * OCF success value is 0, if not zero, change dsaret to fail
1337 if (0 != kop.crk_status)
1340 const DSA_METHOD *meth = DSA_OpenSSL();
1342 dsaret = (meth->dsa_do_verify) (dgst, dlen, sig, dsa);
1345 kop.crk_param[0].crp_p = NULL;
1350 static DSA_METHOD cryptodev_dsa = {
1351 "cryptodev DSA method",
1353 NULL, /* dsa_sign_setup */
1355 NULL, /* dsa_mod_exp */
1364 cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
1365 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
1368 return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx));
1372 cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
1374 struct crypt_kop kop;
1378 if ((fd = get_asym_dev_crypto()) < 0) {
1379 const DH_METHOD *meth = DH_OpenSSL();
1381 return ((meth->compute_key) (key, pub_key, dh));
1384 keylen = BN_num_bits(dh->p);
1386 memset(&kop, 0, sizeof(kop));
1387 kop.crk_op = CRK_DH_COMPUTE_KEY;
1389 /* inputs: dh->priv_key pub_key dh->p key */
1390 if (bn2crparam(dh->priv_key, &kop.crk_param[0]))
1392 if (bn2crparam(pub_key, &kop.crk_param[1]))
1394 if (bn2crparam(dh->p, &kop.crk_param[2]))
1396 kop.crk_iparams = 3;
1398 kop.crk_param[3].crp_p = (caddr_t) key;
1399 kop.crk_param[3].crp_nbits = keylen * 8;
1400 kop.crk_oparams = 1;
1402 if (ioctl(fd, CIOCKEY, &kop) == -1) {
1403 const DH_METHOD *meth = DH_OpenSSL();
1405 dhret = (meth->compute_key) (key, pub_key, dh);
1408 kop.crk_param[3].crp_p = NULL;
1413 static DH_METHOD cryptodev_dh = {
1414 "cryptodev DH method",
1415 NULL, /* cryptodev_dh_generate_key */
1425 * ctrl right now is just a wrapper that doesn't do much
1426 * but I expect we'll want some options soon.
1429 cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
1431 # ifdef HAVE_SYSLOG_R
1432 struct syslog_data sd = SYSLOG_DATA_INIT;
1437 # ifdef HAVE_SYSLOG_R
1438 syslog_r(LOG_ERR, &sd, "cryptodev_ctrl: unknown command %d", cmd);
1440 syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd);
1447 void ENGINE_load_cryptodev(void)
1449 ENGINE *engine = ENGINE_new();
1454 if ((fd = get_dev_crypto()) < 0) {
1455 ENGINE_free(engine);
1460 * find out what asymmetric crypto algorithms we support
1462 if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) {
1464 ENGINE_free(engine);
1469 if (!ENGINE_set_id(engine, "cryptodev") ||
1470 !ENGINE_set_name(engine, "BSD cryptodev engine") ||
1471 !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) ||
1472 !ENGINE_set_digests(engine, cryptodev_engine_digests) ||
1473 !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) ||
1474 !ENGINE_set_cmd_defns(engine, cryptodev_defns)) {
1475 ENGINE_free(engine);
1479 if (ENGINE_set_RSA(engine, &cryptodev_rsa)) {
1480 const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay();
1482 cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp;
1483 cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp;
1484 cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc;
1485 cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec;
1486 cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc;
1487 cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec;
1488 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1489 cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp;
1490 if (cryptodev_asymfeat & CRF_MOD_EXP_CRT)
1491 cryptodev_rsa.rsa_mod_exp = cryptodev_rsa_mod_exp;
1493 cryptodev_rsa.rsa_mod_exp = cryptodev_rsa_nocrt_mod_exp;
1497 if (ENGINE_set_DSA(engine, &cryptodev_dsa)) {
1498 const DSA_METHOD *meth = DSA_OpenSSL();
1500 memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD));
1501 if (cryptodev_asymfeat & CRF_DSA_SIGN)
1502 cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign;
1503 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1504 cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp;
1505 cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp;
1507 if (cryptodev_asymfeat & CRF_DSA_VERIFY)
1508 cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify;
1511 if (ENGINE_set_DH(engine, &cryptodev_dh)) {
1512 const DH_METHOD *dh_meth = DH_OpenSSL();
1514 cryptodev_dh.generate_key = dh_meth->generate_key;
1515 cryptodev_dh.compute_key = dh_meth->compute_key;
1516 cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp;
1517 if (cryptodev_asymfeat & CRF_MOD_EXP) {
1518 cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh;
1519 if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY)
1520 cryptodev_dh.compute_key = cryptodev_dh_compute_key;
1525 ENGINE_free(engine);
1529 #endif /* HAVE_CRYPTODEV */