This commit was generated by cvs2git to track changes on a CVS vendor

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1 files changed, 1133 insertions, 0 deletions

diff --git a/src/lib/libcrypto/engine/eng_cryptodev.c b/src/lib/libcrypto/engine/eng_cryptodev.c
new file mode 100644
index 0000000000..ab38cd52f0
--- /dev/null
+++ b/src/lib/libcrypto/engine/eng_cryptodev.c
@@ -0,0 +1,1133 @@
+/*
+ * 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>
+
+#if (defined(__unix__) || defined(unix)) && !defined(USG) && \
+        (defined(OpenBSD) || defined(__FreeBSD_version))
+#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);
+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, },
+};
+
+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) {
+                *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);
+}
+
+/*
+ * 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);
+}
+
+/*
+ * 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, 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) == -1) {
+                const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
+                ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
+        }
+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) {
+                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)())
+{
+#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 */