| /* |
| * 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. |
| * |
| * 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> |
| #include <openssl/bn.h> |
| #include <openssl/dsa.h> |
| #include <openssl/rsa.h> |
| #include <openssl/dh.h> |
| #include <openssl/err.h> |
| |
| #if (defined(__unix__) || defined(unix)) && !defined(USG) && \ |
| (defined(OpenBSD) || defined(__FreeBSD__)) |
| #include <sys/param.h> |
| # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041) |
| # define HAVE_CRYPTODEV |
| # endif |
| # if (OpenBSD >= 200110) |
| # define HAVE_SYSLOG_R |
| # endif |
| #endif |
| |
| #ifndef HAVE_CRYPTODEV |
| |
| void |
| ENGINE_load_cryptodev(void) |
| { |
| /* This is a NOP on platforms without /dev/crypto */ |
| return; |
| } |
| |
| #else |
| |
| #include <sys/types.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, BN_CTX *ctx); |
| static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx); |
| 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, }, |
| }; |
| |
| #if 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, }, |
| }; |
| #endif |
| |
| /* |
| * 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) { |
| *cnids = 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); |
| } |
| |
| #if 0 /* unused */ |
| /* |
| * 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) { |
| *cnids = 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); |
| } |
| |
| #endif |
| |
| /* |
| * 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; |
| const 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 = 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 = 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 = (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 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 = (char *)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)) { |
| const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| printf("OCF asym process failed, Running in software\n"); |
| ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont); |
| |
| } else if (ECANCELED == kop.crk_status) { |
| const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| printf("OCF hardware operation cancelled. Running in Software\n"); |
| ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont); |
| } |
| /* else cryptodev operation worked ok ==> ret = 1*/ |
| |
| err: |
| zapparams(&kop); |
| return (ret); |
| } |
| |
| static int |
| cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) |
| { |
| int r; |
| |
| r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL); |
| return (r); |
| } |
| |
| static int |
| cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) |
| { |
| 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)) { |
| const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| printf("OCF asym process failed, running in Software\n"); |
| ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx); |
| |
| } else if (ECANCELED == kop.crk_status) { |
| const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| printf("OCF hardware operation cancelled. Running in Software\n"); |
| ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx); |
| } |
| /* else cryptodev operation worked ok ==> ret = 1*/ |
| |
| 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; |
| } |
| |
| 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) { |
| /*OCF success value is 0, if not zero, change dsaret to fail*/ |
| if(0 != kop.crk_status) dsaret = 0; |
| } 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 = (char *)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)()) |
| { |
| #ifdef HAVE_SYSLOG_R |
| struct syslog_data sd = SYSLOG_DATA_INIT; |
| #endif |
| |
| switch (cmd) { |
| default: |
| #ifdef HAVE_SYSLOG_R |
| syslog_r(LOG_ERR, &sd, |
| "cryptodev_ctrl: unknown command %d", cmd); |
| #else |
| syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd); |
| #endif |
| break; |
| } |
| return (1); |
| } |
| |
| void |
| ENGINE_load_cryptodev(void) |
| { |
| ENGINE *engine = ENGINE_new(); |
| int fd; |
| |
| if (engine == NULL) |
| return; |
| if ((fd = get_dev_crypto()) < 0) { |
| ENGINE_free(engine); |
| return; |
| } |
| |
| /* |
| * find out what asymmetric crypto algorithms we support |
| */ |
| if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) { |
| close(fd); |
| ENGINE_free(engine); |
| return; |
| } |
| close(fd); |
| |
| if (!ENGINE_set_id(engine, "cryptodev") || |
| !ENGINE_set_name(engine, "BSD 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 /* HAVE_CRYPTODEV */ |