diff options
Diffstat (limited to 'crypto/engine/hw_cryptodev.c')
| -rw-r--r-- | crypto/engine/hw_cryptodev.c | 1117 |
1 files changed, 0 insertions, 1117 deletions
diff --git a/crypto/engine/hw_cryptodev.c b/crypto/engine/hw_cryptodev.c deleted file mode 100644 index df887b0..0000000 --- a/crypto/engine/hw_cryptodev.c +++ /dev/null @@ -1,1117 +0,0 @@ -/* - * Copyright (c) 2002 Bob Beck <beck@openbsd.org> - * Copyright (c) 2002 Theo de Raadt - * Copyright (c) 2002 Markus Friedl - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the author nor the names of contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#include <openssl/objects.h> -#include <openssl/engine.h> -#include <openssl/evp.h> - -#ifndef __OpenBSD__ - -void -ENGINE_load_cryptodev(void) -{ - /* This is a NOP unless __OpenBSD__ is defined */ - return; -} - -#else /* __OpenBSD__ */ - -#include <sys/types.h> -#include <sys/param.h> -#include <crypto/cryptodev.h> -#include <sys/ioctl.h> -#include <errno.h> -#include <stdio.h> -#include <unistd.h> -#include <fcntl.h> -#include <stdarg.h> -#include <syslog.h> -#include <errno.h> -#include <string.h> - -struct dev_crypto_state { - struct session_op d_sess; - int d_fd; -}; - -static u_int32_t cryptodev_asymfeat = 0; - -static int get_asym_dev_crypto(void); -static int open_dev_crypto(void); -static int get_dev_crypto(void); -static int cryptodev_max_iv(int cipher); -static int cryptodev_key_length_valid(int cipher, int len); -static int cipher_nid_to_cryptodev(int nid); -static int get_cryptodev_ciphers(const int **cnids); -static int get_cryptodev_digests(const int **cnids); -static int cryptodev_usable_ciphers(const int **nids); -static int cryptodev_usable_digests(const int **nids); -static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl); -static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, - const unsigned char *iv, int enc); -static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx); -static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher, - const int **nids, int nid); -static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest, - const int **nids, int nid); -static int bn2crparam(const BIGNUM *a, struct crparam *crp); -static int crparam2bn(struct crparam *crp, BIGNUM *a); -static void zapparams(struct crypt_kop *kop); -static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, - int slen, BIGNUM *s); - -static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, - const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); -static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, - RSA *rsa); -static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa); -static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, - const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); -static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g, - BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p, - BN_CTX *ctx, BN_MONT_CTX *mont); -static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, - int dlen, DSA *dsa); -static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len, - DSA_SIG *sig, DSA *dsa); -static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a, - const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, - BN_MONT_CTX *m_ctx); -static int cryptodev_dh_compute_key(unsigned char *key, - const BIGNUM *pub_key, DH *dh); -static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, - void (*f)()); -void ENGINE_load_cryptodev(void); - -static const ENGINE_CMD_DEFN cryptodev_defns[] = { - { 0, NULL, NULL, 0 } -}; - -static struct { - int id; - int nid; - int ivmax; - int keylen; -} ciphers[] = { - { CRYPTO_DES_CBC, NID_des_cbc, 8, 8, }, - { CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24, }, - { CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16, }, - { CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16, }, - { CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16, }, - { CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0, }, - { 0, NID_undef, 0, 0, }, -}; - -static struct { - int id; - int nid; -} digests[] = { - { CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, }, - { CRYPTO_RIPEMD160_HMAC, NID_ripemd160, }, - { CRYPTO_MD5_KPDK, NID_undef, }, - { CRYPTO_SHA1_KPDK, NID_undef, }, - { CRYPTO_MD5, NID_md5, }, - { CRYPTO_SHA1, NID_undef, }, - { 0, NID_undef, }, -}; - -/* - * Return a fd if /dev/crypto seems usable, 0 otherwise. - */ -static int -open_dev_crypto(void) -{ - static int fd = -1; - - if (fd == -1) { - if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1) - return (-1); - /* close on exec */ - if (fcntl(fd, F_SETFD, 1) == -1) { - close(fd); - fd = -1; - return (-1); - } - } - return (fd); -} - -static int -get_dev_crypto(void) -{ - int fd, retfd; - - if ((fd = open_dev_crypto()) == -1) - return (-1); - if (ioctl(fd, CRIOGET, &retfd) == -1) - return (-1); - - /* close on exec */ - if (fcntl(retfd, F_SETFD, 1) == -1) { - close(retfd); - return (-1); - } - return (retfd); -} - -/* Caching version for asym operations */ -static int -get_asym_dev_crypto(void) -{ - static int fd = -1; - - if (fd == -1) - fd = get_dev_crypto(); - return fd; -} - -/* - * XXXX this needs to be set for each alg - and determined from - * a running card. - */ -static int -cryptodev_max_iv(int cipher) -{ - int i; - - for (i = 0; ciphers[i].id; i++) - if (ciphers[i].id == cipher) - return (ciphers[i].ivmax); - return (0); -} - -/* - * XXXX this needs to be set for each alg - and determined from - * a running card. For now, fake it out - but most of these - * for real devices should return 1 for the supported key - * sizes the device can handle. - */ -static int -cryptodev_key_length_valid(int cipher, int len) -{ - int i; - - for (i = 0; ciphers[i].id; i++) - if (ciphers[i].id == cipher) - return (ciphers[i].keylen == len); - return (0); -} - -/* convert libcrypto nids to cryptodev */ -static int -cipher_nid_to_cryptodev(int nid) -{ - int i; - - for (i = 0; ciphers[i].id; i++) - if (ciphers[i].nid == nid) - return (ciphers[i].id); - return (0); -} - -/* - * Find out what ciphers /dev/crypto will let us have a session for. - * XXX note, that some of these openssl doesn't deal with yet! - * returning them here is harmless, as long as we return NULL - * when asked for a handler in the cryptodev_engine_ciphers routine - */ -static int -get_cryptodev_ciphers(const int **cnids) -{ - static int nids[CRYPTO_ALGORITHM_MAX]; - struct session_op sess; - int fd, i, count = 0; - - if ((fd = get_dev_crypto()) < 0) { - *nids = NULL; - return (0); - } - memset(&sess, 0, sizeof(sess)); - sess.key = (caddr_t)"123456781234567812345678"; - - for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) { - if (ciphers[i].nid == NID_undef) - continue; - sess.cipher = ciphers[i].id; - sess.keylen = ciphers[i].keylen; - sess.mac = 0; - if (ioctl(fd, CIOCGSESSION, &sess) != -1 && - ioctl(fd, CIOCFSESSION, &sess.ses) != -1) - nids[count++] = ciphers[i].nid; - } - close(fd); - - if (count > 0) - *cnids = nids; - else - *cnids = NULL; - return (count); -} - -/* - * Find out what digests /dev/crypto will let us have a session for. - * XXX note, that some of these openssl doesn't deal with yet! - * returning them here is harmless, as long as we return NULL - * when asked for a handler in the cryptodev_engine_digests routine - */ -static int -get_cryptodev_digests(const int **cnids) -{ - static int nids[CRYPTO_ALGORITHM_MAX]; - struct session_op sess; - int fd, i, count = 0; - - if ((fd = get_dev_crypto()) < 0) { - *nids = NULL; - return (0); - } - memset(&sess, 0, sizeof(sess)); - for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) { - if (digests[i].nid == NID_undef) - continue; - sess.mac = digests[i].id; - sess.cipher = 0; - if (ioctl(fd, CIOCGSESSION, &sess) != -1 && - ioctl(fd, CIOCFSESSION, &sess.ses) != -1) - nids[count++] = digests[i].nid; - } - close(fd); - - if (count > 0) - *cnids = nids; - else - *cnids = NULL; - return (count); -} - -/* - * Find the useable ciphers|digests from dev/crypto - this is the first - * thing called by the engine init crud which determines what it - * can use for ciphers from this engine. We want to return - * only what we can do, anythine else is handled by software. - * - * If we can't initialize the device to do anything useful for - * any reason, we want to return a NULL array, and 0 length, - * which forces everything to be done is software. By putting - * the initalization of the device in here, we ensure we can - * use this engine as the default, and if for whatever reason - * /dev/crypto won't do what we want it will just be done in - * software - * - * This can (should) be greatly expanded to perhaps take into - * account speed of the device, and what we want to do. - * (although the disabling of particular alg's could be controlled - * by the device driver with sysctl's.) - this is where we - * want most of the decisions made about what we actually want - * to use from /dev/crypto. - */ -static int -cryptodev_usable_ciphers(const int **nids) -{ - return (get_cryptodev_ciphers(nids)); -} - -static int -cryptodev_usable_digests(const int **nids) -{ - /* - * XXXX just disable all digests for now, because it sucks. - * we need a better way to decide this - i.e. I may not - * want digests on slow cards like hifn on fast machines, - * but might want them on slow or loaded machines, etc. - * will also want them when using crypto cards that don't - * suck moose gonads - would be nice to be able to decide something - * as reasonable default without having hackery that's card dependent. - * of course, the default should probably be just do everything, - * with perhaps a sysctl to turn algoritms off (or have them off - * by default) on cards that generally suck like the hifn. - */ - *nids = NULL; - return (0); -} - -static int -cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) -{ - struct crypt_op cryp; - struct dev_crypto_state *state = ctx->cipher_data; - struct session_op *sess = &state->d_sess; - void *iiv; - unsigned char save_iv[EVP_MAX_IV_LENGTH]; - - if (state->d_fd < 0) - return (0); - if (!inl) - return (1); - if ((inl % ctx->cipher->block_size) != 0) - return (0); - - memset(&cryp, 0, sizeof(cryp)); - - cryp.ses = sess->ses; - cryp.flags = 0; - cryp.len = inl; - cryp.src = (caddr_t) in; - cryp.dst = (caddr_t) out; - cryp.mac = 0; - - cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT; - - if (ctx->cipher->iv_len) { - cryp.iv = (caddr_t) ctx->iv; - if (!ctx->encrypt) { - iiv = (void *) in + inl - ctx->cipher->iv_len; - memcpy(save_iv, iiv, ctx->cipher->iv_len); - } - } else - cryp.iv = NULL; - - if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) { - /* XXX need better errror handling - * this can fail for a number of different reasons. - */ - return (0); - } - - if (ctx->cipher->iv_len) { - if (ctx->encrypt) - iiv = (void *) out + inl - ctx->cipher->iv_len; - else - iiv = save_iv; - memcpy(ctx->iv, iiv, ctx->cipher->iv_len); - } - return (1); -} - -static int -cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, - const unsigned char *iv, int enc) -{ - struct dev_crypto_state *state = ctx->cipher_data; - struct session_op *sess = &state->d_sess; - int cipher; - - if ((cipher = cipher_nid_to_cryptodev(ctx->cipher->nid)) == NID_undef) - return (0); - - if (ctx->cipher->iv_len > cryptodev_max_iv(cipher)) - return (0); - - if (!cryptodev_key_length_valid(cipher, ctx->key_len)) - return (0); - - memset(sess, 0, sizeof(struct session_op)); - - if ((state->d_fd = get_dev_crypto()) < 0) - return (0); - - sess->key = (unsigned char *)key; - sess->keylen = ctx->key_len; - sess->cipher = cipher; - - if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) { - close(state->d_fd); - state->d_fd = -1; - return (0); - } - return (1); -} - -/* - * free anything we allocated earlier when initting a - * session, and close the session. - */ -static int -cryptodev_cleanup(EVP_CIPHER_CTX *ctx) -{ - int ret = 0; - struct dev_crypto_state *state = ctx->cipher_data; - struct session_op *sess = &state->d_sess; - - if (state->d_fd < 0) - return (0); - - /* XXX if this ioctl fails, someting's wrong. the invoker - * may have called us with a bogus ctx, or we could - * have a device that for whatever reason just doesn't - * want to play ball - it's not clear what's right - * here - should this be an error? should it just - * increase a counter, hmm. For right now, we return - * 0 - I don't believe that to be "right". we could - * call the gorpy openssl lib error handlers that - * print messages to users of the library. hmm.. - */ - - if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) { - ret = 0; - } else { - ret = 1; - } - close(state->d_fd); - state->d_fd = -1; - - return (ret); -} - -/* - * libcrypto EVP stuff - this is how we get wired to EVP so the engine - * gets called when libcrypto requests a cipher NID. - */ - -/* DES CBC EVP */ -const EVP_CIPHER cryptodev_des_cbc = { - NID_des_cbc, - 8, 8, 8, - EVP_CIPH_CBC_MODE, - cryptodev_init_key, - cryptodev_cipher, - cryptodev_cleanup, - sizeof(struct dev_crypto_state), - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL -}; - -/* 3DES CBC EVP */ -const EVP_CIPHER cryptodev_3des_cbc = { - NID_des_ede3_cbc, - 8, 24, 8, - EVP_CIPH_CBC_MODE, - cryptodev_init_key, - cryptodev_cipher, - cryptodev_cleanup, - sizeof(struct dev_crypto_state), - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL -}; - -const EVP_CIPHER cryptodev_bf_cbc = { - NID_bf_cbc, - 8, 16, 8, - EVP_CIPH_CBC_MODE, - cryptodev_init_key, - cryptodev_cipher, - cryptodev_cleanup, - sizeof(struct dev_crypto_state), - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL -}; - -const EVP_CIPHER cryptodev_cast_cbc = { - NID_cast5_cbc, - 8, 16, 8, - EVP_CIPH_CBC_MODE, - cryptodev_init_key, - cryptodev_cipher, - cryptodev_cleanup, - sizeof(struct dev_crypto_state), - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL -}; - -const EVP_CIPHER cryptodev_aes_cbc = { - NID_aes_128_cbc, - 16, 16, 16, - EVP_CIPH_CBC_MODE, - cryptodev_init_key, - cryptodev_cipher, - cryptodev_cleanup, - sizeof(struct dev_crypto_state), - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL -}; - -/* - * Registered by the ENGINE when used to find out how to deal with - * a particular NID in the ENGINE. this says what we'll do at the - * top level - note, that list is restricted by what we answer with - */ -static int -cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher, - const int **nids, int nid) -{ - if (!cipher) - return (cryptodev_usable_ciphers(nids)); - - switch (nid) { - case NID_des_ede3_cbc: - *cipher = &cryptodev_3des_cbc; - break; - case NID_des_cbc: - *cipher = &cryptodev_des_cbc; - break; - case NID_bf_cbc: - *cipher = &cryptodev_bf_cbc; - break; - case NID_cast5_cbc: - *cipher = &cryptodev_cast_cbc; - break; - case NID_aes_128_cbc: - *cipher = &cryptodev_aes_cbc; - break; - default: - *cipher = NULL; - break; - } - return (*cipher != NULL); -} - -static int -cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest, - const int **nids, int nid) -{ - if (!digest) - return (cryptodev_usable_digests(nids)); - - switch (nid) { - case NID_md5: - *digest = NULL; /* need to make a clean md5 critter */ - break; - default: - *digest = NULL; - break; - } - return (*digest != NULL); -} - -/* - * Convert a BIGNUM to the representation that /dev/crypto needs. - * Upon completion of use, the caller is responsible for freeing - * crp->crp_p. - */ -static int -bn2crparam(const BIGNUM *a, struct crparam *crp) -{ - int i, j, k; - ssize_t words, bytes, bits; - u_char *b; - - crp->crp_p = NULL; - crp->crp_nbits = 0; - - bits = BN_num_bits(a); - bytes = (bits + 7) / 8; - - b = malloc(bytes); - if (b == NULL) - return (1); - - crp->crp_p = b; - crp->crp_nbits = bits; - - for (i = 0, j = 0; i < a->top; i++) { - for (k = 0; k < BN_BITS2 / 8; k++) { - if ((j + k) >= bytes) - return (0); - b[j + k] = a->d[i] >> (k * 8); - } - j += BN_BITS2 / 8; - } - return (0); -} - -/* Convert a /dev/crypto parameter to a BIGNUM */ -static int -crparam2bn(struct crparam *crp, BIGNUM *a) -{ - u_int8_t *pd; - int i, bytes; - - bytes = (crp->crp_nbits + 7) / 8; - - if (bytes == 0) - return (-1); - - if ((pd = (u_int8_t *) malloc(bytes)) == NULL) - return (-1); - - for (i = 0; i < bytes; i++) - pd[i] = crp->crp_p[bytes - i - 1]; - - BN_bin2bn(pd, bytes, a); - free(pd); - - return (0); -} - -static void -zapparams(struct crypt_kop *kop) -{ - int i; - - for (i = 0; i <= kop->crk_iparams + kop->crk_oparams; i++) { - if (kop->crk_param[i].crp_p) - free(kop->crk_param[i].crp_p); - kop->crk_param[i].crp_p = NULL; - kop->crk_param[i].crp_nbits = 0; - } -} - -static int -cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s) -{ - int fd, ret = -1; - - if ((fd = get_asym_dev_crypto()) < 0) - return (ret); - - if (r) { - kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char)); - kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8; - kop->crk_oparams++; - } - if (s) { - kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char)); - kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8; - kop->crk_oparams++; - } - - if (ioctl(fd, CIOCKEY, kop) == 0) { - if (r) - crparam2bn(&kop->crk_param[kop->crk_iparams], r); - if (s) - crparam2bn(&kop->crk_param[kop->crk_iparams+1], s); - ret = 0; - } - - return (ret); -} - -static int -cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, - const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont) -{ - struct crypt_kop kop; - int ret = 1; - - /* Currently, we know we can do mod exp iff we can do any - * asymmetric operations at all. - */ - if (cryptodev_asymfeat == 0) { - ret = BN_mod_exp(r, a, p, m, ctx); - return (ret); - } - - memset(&kop, 0, sizeof kop); - kop.crk_op = CRK_MOD_EXP; - - /* inputs: a^p % m */ - if (bn2crparam(a, &kop.crk_param[0])) - goto err; - if (bn2crparam(p, &kop.crk_param[1])) - goto err; - if (bn2crparam(m, &kop.crk_param[2])) - goto err; - kop.crk_iparams = 3; - - if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL) == -1) { - const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); - ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont); - } -err: - zapparams(&kop); - return (ret); -} - -static int -cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa) -{ - int r; - BN_CTX *ctx; - - ctx = BN_CTX_new(); - r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL); - BN_CTX_free(ctx); - return (r); -} - -static int -cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa) -{ - struct crypt_kop kop; - int ret = 1; - - if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) { - /* XXX 0 means failure?? */ - return (0); - } - - memset(&kop, 0, sizeof kop); - kop.crk_op = CRK_MOD_EXP_CRT; - /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */ - if (bn2crparam(rsa->p, &kop.crk_param[0])) - goto err; - if (bn2crparam(rsa->q, &kop.crk_param[1])) - goto err; - if (bn2crparam(I, &kop.crk_param[2])) - goto err; - if (bn2crparam(rsa->dmp1, &kop.crk_param[3])) - goto err; - if (bn2crparam(rsa->dmq1, &kop.crk_param[4])) - goto err; - if (bn2crparam(rsa->iqmp, &kop.crk_param[5])) - goto err; - kop.crk_iparams = 6; - - if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL) == -1) { - const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); - ret = (*meth->rsa_mod_exp)(r0, I, rsa); - } -err: - zapparams(&kop); - return (ret); -} - -static RSA_METHOD cryptodev_rsa = { - "cryptodev RSA method", - NULL, /* rsa_pub_enc */ - NULL, /* rsa_pub_dec */ - NULL, /* rsa_priv_enc */ - NULL, /* rsa_priv_dec */ - NULL, - NULL, - NULL, /* init */ - NULL, /* finish */ - 0, /* flags */ - NULL, /* app_data */ - NULL, /* rsa_sign */ - NULL /* rsa_verify */ -}; - -static int -cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, - const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) -{ - return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx)); -} - -static int -cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g, - BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p, - BN_CTX *ctx, BN_MONT_CTX *mont) -{ - BIGNUM t2; - int ret = 0; - - BN_init(&t2); - - /* v = ( g^u1 * y^u2 mod p ) mod q */ - /* let t1 = g ^ u1 mod p */ - ret = 0; - - if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont)) - goto err; - - /* let t2 = y ^ u2 mod p */ - if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont)) - goto err; - /* let u1 = t1 * t2 mod p */ - if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx)) - goto err; - - BN_copy(t1,u1); - - ret = 1; -err: - BN_free(&t2); - return(ret); -} - -static DSA_SIG * -cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa) -{ - struct crypt_kop kop; - BIGNUM *r = NULL, *s = NULL; - DSA_SIG *dsaret = NULL; - - if ((r = BN_new()) == NULL) - goto err; - if ((s = BN_new()) == NULL) { - BN_free(r); - goto err; - } - - printf("bar\n"); - memset(&kop, 0, sizeof kop); - kop.crk_op = CRK_DSA_SIGN; - - /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */ - kop.crk_param[0].crp_p = (caddr_t)dgst; - kop.crk_param[0].crp_nbits = dlen * 8; - if (bn2crparam(dsa->p, &kop.crk_param[1])) - goto err; - if (bn2crparam(dsa->q, &kop.crk_param[2])) - goto err; - if (bn2crparam(dsa->g, &kop.crk_param[3])) - goto err; - if (bn2crparam(dsa->priv_key, &kop.crk_param[4])) - goto err; - kop.crk_iparams = 5; - - if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r, - BN_num_bytes(dsa->q), s) == 0) { - dsaret = DSA_SIG_new(); - dsaret->r = r; - dsaret->s = s; - } else { - const DSA_METHOD *meth = DSA_OpenSSL(); - BN_free(r); - BN_free(s); - dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa); - } -err: - kop.crk_param[0].crp_p = NULL; - zapparams(&kop); - return (dsaret); -} - -static int -cryptodev_dsa_verify(const unsigned char *dgst, int dlen, - DSA_SIG *sig, DSA *dsa) -{ - struct crypt_kop kop; - int dsaret = 1; - - memset(&kop, 0, sizeof kop); - kop.crk_op = CRK_DSA_VERIFY; - - /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */ - kop.crk_param[0].crp_p = (caddr_t)dgst; - kop.crk_param[0].crp_nbits = dlen * 8; - if (bn2crparam(dsa->p, &kop.crk_param[1])) - goto err; - if (bn2crparam(dsa->q, &kop.crk_param[2])) - goto err; - if (bn2crparam(dsa->g, &kop.crk_param[3])) - goto err; - if (bn2crparam(dsa->pub_key, &kop.crk_param[4])) - goto err; - if (bn2crparam(sig->r, &kop.crk_param[5])) - goto err; - if (bn2crparam(sig->s, &kop.crk_param[6])) - goto err; - kop.crk_iparams = 7; - - if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) { - dsaret = kop.crk_status; - } else { - const DSA_METHOD *meth = DSA_OpenSSL(); - - dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa); - } -err: - kop.crk_param[0].crp_p = NULL; - zapparams(&kop); - return (dsaret); -} - -static DSA_METHOD cryptodev_dsa = { - "cryptodev DSA method", - NULL, - NULL, /* dsa_sign_setup */ - NULL, - NULL, /* dsa_mod_exp */ - NULL, - NULL, /* init */ - NULL, /* finish */ - 0, /* flags */ - NULL /* app_data */ -}; - -static int -cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a, - const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, - BN_MONT_CTX *m_ctx) -{ - return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx)); -} - -static int -cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) -{ - struct crypt_kop kop; - int dhret = 1; - int fd, keylen; - - if ((fd = get_asym_dev_crypto()) < 0) { - const DH_METHOD *meth = DH_OpenSSL(); - - return ((meth->compute_key)(key, pub_key, dh)); - } - - keylen = BN_num_bits(dh->p); - - memset(&kop, 0, sizeof kop); - kop.crk_op = CRK_DH_COMPUTE_KEY; - - /* inputs: dh->priv_key pub_key dh->p key */ - if (bn2crparam(dh->priv_key, &kop.crk_param[0])) - goto err; - if (bn2crparam(pub_key, &kop.crk_param[1])) - goto err; - if (bn2crparam(dh->p, &kop.crk_param[2])) - goto err; - kop.crk_iparams = 3; - - kop.crk_param[3].crp_p = key; - kop.crk_param[3].crp_nbits = keylen * 8; - kop.crk_oparams = 1; - - if (ioctl(fd, CIOCKEY, &kop) == -1) { - const DH_METHOD *meth = DH_OpenSSL(); - - dhret = (meth->compute_key)(key, pub_key, dh); - } -err: - kop.crk_param[3].crp_p = NULL; - zapparams(&kop); - return (dhret); -} - -static DH_METHOD cryptodev_dh = { - "cryptodev DH method", - NULL, /* cryptodev_dh_generate_key */ - NULL, - NULL, - NULL, - NULL, - 0, /* flags */ - NULL /* app_data */ -}; - -/* - * ctrl right now is just a wrapper that doesn't do much - * but I expect we'll want some options soon. - */ -static int -cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)()) -{ - struct syslog_data sd = SYSLOG_DATA_INIT; - - switch (cmd) { - default: - syslog_r(LOG_ERR, &sd, - "cryptodev_ctrl: unknown command %d", cmd); - break; - } - return (1); -} - -void -ENGINE_load_cryptodev(void) -{ - ENGINE *engine = ENGINE_new(); - int fd; - - if (engine == NULL) - return; - if ((fd = get_dev_crypto()) < 0) - return; - - /* - * find out what asymmetric crypto algorithms we support - */ - if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) { - close(fd); - return; - } - close(fd); - - if (!ENGINE_set_id(engine, "cryptodev") || - !ENGINE_set_name(engine, "OpenBSD cryptodev engine") || - !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) || - !ENGINE_set_digests(engine, cryptodev_engine_digests) || - !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) || - !ENGINE_set_cmd_defns(engine, cryptodev_defns)) { - ENGINE_free(engine); - return; - } - - if (ENGINE_set_RSA(engine, &cryptodev_rsa)) { - const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay(); - - cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp; - cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp; - cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc; - cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec; - cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc; - cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec; - if (cryptodev_asymfeat & CRF_MOD_EXP) { - cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp; - if (cryptodev_asymfeat & CRF_MOD_EXP_CRT) - cryptodev_rsa.rsa_mod_exp = - cryptodev_rsa_mod_exp; - else - cryptodev_rsa.rsa_mod_exp = - cryptodev_rsa_nocrt_mod_exp; - } - } - - if (ENGINE_set_DSA(engine, &cryptodev_dsa)) { - const DSA_METHOD *meth = DSA_OpenSSL(); - - memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD)); - if (cryptodev_asymfeat & CRF_DSA_SIGN) - cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign; - if (cryptodev_asymfeat & CRF_MOD_EXP) { - cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp; - cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp; - } - if (cryptodev_asymfeat & CRF_DSA_VERIFY) - cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify; - } - - if (ENGINE_set_DH(engine, &cryptodev_dh)){ - const DH_METHOD *dh_meth = DH_OpenSSL(); - - cryptodev_dh.generate_key = dh_meth->generate_key; - cryptodev_dh.compute_key = dh_meth->compute_key; - cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp; - if (cryptodev_asymfeat & CRF_MOD_EXP) { - cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh; - if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY) - cryptodev_dh.compute_key = - cryptodev_dh_compute_key; - } - } - - ENGINE_add(engine); - ENGINE_free(engine); - ERR_clear_error(); -} - -#endif /* __OpenBSD__ */ |