OpenSSL 0.9.7 stable 2002 05 08 merge

1 files changed, 1041 insertions, 0 deletions

diff --git a/src/lib/libcrypto/engine/hw_ubsec.c b/src/lib/libcrypto/engine/hw_ubsec.c
new file mode 100644
index 0000000000..743c06043c
--- /dev/null
+++ b/src/lib/libcrypto/engine/hw_ubsec.c
@@ -0,0 +1,1041 @@
+/* crypto/engine/hw_ubsec.c */
+/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
+ * project 2000.
+ *
+ * Cloned shamelessly by Joe Tardo. 
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2001 The OpenSSL Project.  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. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include <openssl/crypto.h>
+#include "cryptlib.h"
+#include <openssl/dso.h>
+#include <openssl/engine.h>
+
+#ifndef OPENSSL_NO_HW
+#ifndef OPENSSL_NO_HW_UBSEC
+
+#ifdef FLAT_INC
+#include "hw_ubsec.h"
+#else
+#include "vendor_defns/hw_ubsec.h"
+#endif
+
+#define UBSEC_LIB_NAME "ubsec engine"
+#include "hw_ubsec_err.c"
+
+#define FAIL_TO_SOFTWARE -15
+
+static int ubsec_destroy(ENGINE *e);
+static int ubsec_init(ENGINE *e);
+static int ubsec_finish(ENGINE *e);
+static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
+static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+                const BIGNUM *m, BN_CTX *ctx);
+static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+                        const BIGNUM *q, const BIGNUM *dp,
+                        const BIGNUM *dq, const BIGNUM *qinv, BN_CTX *ctx);
+#ifndef OPENSSL_NO_RSA
+static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
+#endif
+static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+                const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
+#ifndef OPENSSL_NO_DSA
+#if NOT_USED
+static int ubsec_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
+                BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
+                BN_CTX *ctx, BN_MONT_CTX *in_mont);
+static int ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
+                const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
+                BN_MONT_CTX *m_ctx);
+#endif
+static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
+static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
+                                DSA_SIG *sig, DSA *dsa);
+#endif
+#ifndef OPENSSL_NO_DH
+static int ubsec_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 ubsec_dh_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
+static int ubsec_dh_generate_key(DH *dh);
+#endif
+
+#if NOT_USED
+static int ubsec_rand_bytes(unsigned char *buf, int num);
+static int ubsec_rand_status(void);
+#endif
+
+#define UBSEC_CMD_SO_PATH               ENGINE_CMD_BASE
+static const ENGINE_CMD_DEFN ubsec_cmd_defns[] = {
+        {UBSEC_CMD_SO_PATH,
+                "SO_PATH",
+                "Specifies the path to the 'ubsec' shared library",
+                ENGINE_CMD_FLAG_STRING},
+        {0, NULL, NULL, 0}
+        };
+
+#ifndef OPENSSL_NO_RSA
+/* Our internal RSA_METHOD that we provide pointers to */
+static RSA_METHOD ubsec_rsa =
+        {
+        "UBSEC RSA method",
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        ubsec_rsa_mod_exp,
+        ubsec_mod_exp_mont,
+        NULL,
+        NULL,
+        0,
+        NULL,
+        NULL,
+        NULL
+        };
+#endif
+
+#ifndef OPENSSL_NO_DSA
+/* Our internal DSA_METHOD that we provide pointers to */
+static DSA_METHOD ubsec_dsa =
+        {
+        "UBSEC DSA method",
+        ubsec_dsa_do_sign, /* dsa_do_sign */
+        NULL, /* dsa_sign_setup */
+        ubsec_dsa_verify, /* dsa_do_verify */
+        NULL, /* ubsec_dsa_mod_exp */ /* dsa_mod_exp */
+        NULL, /* ubsec_mod_exp_dsa */ /* bn_mod_exp */
+        NULL, /* init */
+        NULL, /* finish */
+        0, /* flags */
+        NULL /* app_data */
+        };
+#endif
+
+#ifndef OPENSSL_NO_DH
+/* Our internal DH_METHOD that we provide pointers to */
+static DH_METHOD ubsec_dh =
+        {
+        "UBSEC DH method",
+        ubsec_dh_generate_key,
+        ubsec_dh_compute_key,
+        ubsec_mod_exp_dh,
+        NULL,
+        NULL,
+        0,
+        NULL
+        };
+#endif
+
+/* Constants used when creating the ENGINE */
+static const char *engine_ubsec_id = "ubsec";
+static const char *engine_ubsec_name = "UBSEC hardware engine support";
+
+/* This internal function is used by ENGINE_ubsec() and possibly by the
+ * "dynamic" ENGINE support too */
+static int bind_helper(ENGINE *e)
+        {
+#ifndef OPENSSL_NO_RSA
+        const RSA_METHOD *meth1;
+#endif
+#ifndef OPENSSL_NO_DH
+#ifndef HAVE_UBSEC_DH
+        const DH_METHOD *meth3;
+#endif /* HAVE_UBSEC_DH */
+#endif
+        if(!ENGINE_set_id(e, engine_ubsec_id) ||
+                        !ENGINE_set_name(e, engine_ubsec_name) ||
+#ifndef OPENSSL_NO_RSA
+                        !ENGINE_set_RSA(e, &ubsec_rsa) ||
+#endif
+#ifndef OPENSSL_NO_DSA
+                        !ENGINE_set_DSA(e, &ubsec_dsa) ||
+#endif
+#ifndef OPENSSL_NO_DH
+                        !ENGINE_set_DH(e, &ubsec_dh) ||
+#endif
+                        !ENGINE_set_destroy_function(e, ubsec_destroy) ||
+                        !ENGINE_set_init_function(e, ubsec_init) ||
+                        !ENGINE_set_finish_function(e, ubsec_finish) ||
+                        !ENGINE_set_ctrl_function(e, ubsec_ctrl) ||
+                        !ENGINE_set_cmd_defns(e, ubsec_cmd_defns))
+                return 0;
+
+#ifndef OPENSSL_NO_RSA
+        /* We know that the "PKCS1_SSLeay()" functions hook properly
+         * to the Broadcom-specific mod_exp and mod_exp_crt so we use
+         * those functions. NB: We don't use ENGINE_openssl() or
+         * anything "more generic" because something like the RSAref
+         * code may not hook properly, and if you own one of these
+         * cards then you have the right to do RSA operations on it
+         * anyway! */ 
+        meth1 = RSA_PKCS1_SSLeay();
+        ubsec_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
+        ubsec_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
+        ubsec_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
+        ubsec_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
+#endif
+
+#ifndef OPENSSL_NO_DH
+#ifndef HAVE_UBSEC_DH
+        /* Much the same for Diffie-Hellman */
+        meth3 = DH_OpenSSL();
+        ubsec_dh.generate_key = meth3->generate_key;
+        ubsec_dh.compute_key = meth3->compute_key;
+#endif /* HAVE_UBSEC_DH */
+#endif
+
+        /* Ensure the ubsec error handling is set up */
+        ERR_load_UBSEC_strings();
+        return 1;
+        }
+
+static ENGINE *engine_ubsec(void)
+        {
+        ENGINE *ret = ENGINE_new();
+        if(!ret)
+                return NULL;
+        if(!bind_helper(ret))
+                {
+                ENGINE_free(ret);
+                return NULL;
+                }
+        return ret;
+        }
+
+void ENGINE_load_ubsec(void)
+        {
+        /* Copied from eng_[openssl|dyn].c */
+        ENGINE *toadd = engine_ubsec();
+        if(!toadd) return;
+        ENGINE_add(toadd);
+        ENGINE_free(toadd);
+        ERR_clear_error();
+        }
+
+/* This is a process-global DSO handle used for loading and unloading
+ * the UBSEC library. NB: This is only set (or unset) during an
+ * init() or finish() call (reference counts permitting) and they're
+ * operating with global locks, so this should be thread-safe
+ * implicitly. */
+
+static DSO *ubsec_dso = NULL;
+
+/* These are the function pointers that are (un)set when the library has
+ * successfully (un)loaded. */
+
+static t_UBSEC_ubsec_bytes_to_bits *p_UBSEC_ubsec_bytes_to_bits = NULL;
+static t_UBSEC_ubsec_bits_to_bytes *p_UBSEC_ubsec_bits_to_bytes = NULL;
+static t_UBSEC_ubsec_open *p_UBSEC_ubsec_open = NULL;
+static t_UBSEC_ubsec_close *p_UBSEC_ubsec_close = NULL;
+#ifndef OPENSSL_NO_DH
+static t_UBSEC_diffie_hellman_generate_ioctl 
+        *p_UBSEC_diffie_hellman_generate_ioctl = NULL;
+static t_UBSEC_diffie_hellman_agree_ioctl *p_UBSEC_diffie_hellman_agree_ioctl = NULL;
+#endif
+/* #ifndef OPENSSL_NO_RSA */
+static t_UBSEC_rsa_mod_exp_ioctl *p_UBSEC_rsa_mod_exp_ioctl = NULL;
+static t_UBSEC_rsa_mod_exp_crt_ioctl *p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
+/* #endif */
+#ifndef OPENSSL_NO_DSA
+static t_UBSEC_dsa_sign_ioctl *p_UBSEC_dsa_sign_ioctl = NULL;
+static t_UBSEC_dsa_verify_ioctl *p_UBSEC_dsa_verify_ioctl = NULL;
+#endif
+static t_UBSEC_math_accelerate_ioctl *p_UBSEC_math_accelerate_ioctl = NULL;
+static t_UBSEC_rng_ioctl *p_UBSEC_rng_ioctl = NULL;
+static t_UBSEC_max_key_len_ioctl *p_UBSEC_max_key_len_ioctl = NULL;
+
+static int max_key_len = 1024;  /* ??? */
+
+/* 
+ * These are the static string constants for the DSO file name and the function
+ * symbol names to bind to. 
+ */
+
+static const char *UBSEC_LIBNAME = "ubsec";
+static const char *UBSEC_F1 = "ubsec_bytes_to_bits";
+static const char *UBSEC_F2 = "ubsec_bits_to_bytes";
+static const char *UBSEC_F3 = "ubsec_open";
+static const char *UBSEC_F4 = "ubsec_close";
+#ifndef OPENSSL_NO_DH
+static const char *UBSEC_F5 = "diffie_hellman_generate_ioctl";
+static const char *UBSEC_F6 = "diffie_hellman_agree_ioctl";
+#endif
+/* #ifndef OPENSSL_NO_RSA */
+static const char *UBSEC_F7 = "rsa_mod_exp_ioctl";
+static const char *UBSEC_F8 = "rsa_mod_exp_crt_ioctl";
+/* #endif */
+#ifndef OPENSSL_NO_DSA
+static const char *UBSEC_F9 = "dsa_sign_ioctl";
+static const char *UBSEC_F10 = "dsa_verify_ioctl";
+#endif
+static const char *UBSEC_F11 = "math_accelerate_ioctl";
+static const char *UBSEC_F12 = "rng_ioctl";
+static const char *UBSEC_F13 = "ubsec_max_key_len_ioctl";
+
+/* Destructor (complements the "ENGINE_ubsec()" constructor) */
+static int ubsec_destroy(ENGINE *e)
+        {
+        ERR_unload_UBSEC_strings();
+        return 1;
+        }
+
+/* (de)initialisation functions. */
+static int ubsec_init(ENGINE *e)
+        {
+        t_UBSEC_ubsec_bytes_to_bits *p1;
+        t_UBSEC_ubsec_bits_to_bytes *p2;
+        t_UBSEC_ubsec_open *p3;
+        t_UBSEC_ubsec_close *p4;
+#ifndef OPENSSL_NO_DH
+        t_UBSEC_diffie_hellman_generate_ioctl *p5;
+        t_UBSEC_diffie_hellman_agree_ioctl *p6;
+#endif
+/* #ifndef OPENSSL_NO_RSA */
+        t_UBSEC_rsa_mod_exp_ioctl *p7;
+        t_UBSEC_rsa_mod_exp_crt_ioctl *p8;
+/* #endif */
+#ifndef OPENSSL_NO_DSA
+        t_UBSEC_dsa_sign_ioctl *p9;
+        t_UBSEC_dsa_verify_ioctl *p10;
+#endif
+        t_UBSEC_math_accelerate_ioctl *p11;
+        t_UBSEC_rng_ioctl *p12;
+        t_UBSEC_max_key_len_ioctl *p13;
+        int fd = 0;
+
+        if(ubsec_dso != NULL)
+                {
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_ALREADY_LOADED);
+                goto err;
+                }
+        /* 
+         * Attempt to load libubsec.so/ubsec.dll/whatever. 
+         */
+        ubsec_dso = DSO_load(NULL, UBSEC_LIBNAME, NULL, 0);
+        if(ubsec_dso == NULL)
+                {
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
+                goto err;
+                }
+
+        if (
+        !(p1 = (t_UBSEC_ubsec_bytes_to_bits *) DSO_bind_func(ubsec_dso, UBSEC_F1)) ||
+        !(p2 = (t_UBSEC_ubsec_bits_to_bytes *) DSO_bind_func(ubsec_dso, UBSEC_F2)) ||
+        !(p3 = (t_UBSEC_ubsec_open *) DSO_bind_func(ubsec_dso, UBSEC_F3)) ||
+        !(p4 = (t_UBSEC_ubsec_close *) DSO_bind_func(ubsec_dso, UBSEC_F4)) ||
+#ifndef OPENSSL_NO_DH
+        !(p5 = (t_UBSEC_diffie_hellman_generate_ioctl *) 
+                                DSO_bind_func(ubsec_dso, UBSEC_F5)) ||
+        !(p6 = (t_UBSEC_diffie_hellman_agree_ioctl *) 
+                                DSO_bind_func(ubsec_dso, UBSEC_F6)) ||
+#endif
+/* #ifndef OPENSSL_NO_RSA */
+        !(p7 = (t_UBSEC_rsa_mod_exp_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F7)) ||
+        !(p8 = (t_UBSEC_rsa_mod_exp_crt_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F8)) ||
+/* #endif */
+#ifndef OPENSSL_NO_DSA
+        !(p9 = (t_UBSEC_dsa_sign_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F9)) ||
+        !(p10 = (t_UBSEC_dsa_verify_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F10)) ||
+#endif
+        !(p11 = (t_UBSEC_math_accelerate_ioctl *) 
+                                DSO_bind_func(ubsec_dso, UBSEC_F11)) ||
+        !(p12 = (t_UBSEC_rng_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F12)) ||
+        !(p13 = (t_UBSEC_max_key_len_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F13)))
+                {
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
+                goto err;
+                }
+
+        /* Copy the pointers */
+        p_UBSEC_ubsec_bytes_to_bits = p1;
+        p_UBSEC_ubsec_bits_to_bytes = p2;
+        p_UBSEC_ubsec_open = p3;
+        p_UBSEC_ubsec_close = p4;
+#ifndef OPENSSL_NO_DH
+        p_UBSEC_diffie_hellman_generate_ioctl = p5;
+        p_UBSEC_diffie_hellman_agree_ioctl = p6;
+#endif
+#ifndef OPENSSL_NO_RSA
+        p_UBSEC_rsa_mod_exp_ioctl = p7;
+        p_UBSEC_rsa_mod_exp_crt_ioctl = p8;
+#endif
+#ifndef OPENSSL_NO_DSA
+        p_UBSEC_dsa_sign_ioctl = p9;
+        p_UBSEC_dsa_verify_ioctl = p10;
+#endif
+        p_UBSEC_math_accelerate_ioctl = p11;
+        p_UBSEC_rng_ioctl = p12;
+        p_UBSEC_max_key_len_ioctl = p13;
+
+        /* Perform an open to see if there's actually any unit running. */
+        if (((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) > 0) && (p_UBSEC_max_key_len_ioctl(fd, &max_key_len) == 0))
+        {
+           p_UBSEC_ubsec_close(fd);
+           return 1;
+        }
+        else
+        {
+          UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+        }
+
+err:
+        if(ubsec_dso)
+                DSO_free(ubsec_dso);
+        p_UBSEC_ubsec_bytes_to_bits = NULL;
+        p_UBSEC_ubsec_bits_to_bytes = NULL;
+        p_UBSEC_ubsec_open = NULL;
+        p_UBSEC_ubsec_close = NULL;
+#ifndef OPENSSL_NO_DH
+        p_UBSEC_diffie_hellman_generate_ioctl = NULL;
+        p_UBSEC_diffie_hellman_agree_ioctl = NULL;
+#endif
+#ifndef OPENSSL_NO_RSA
+        p_UBSEC_rsa_mod_exp_ioctl = NULL;
+        p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
+#endif
+#ifndef OPENSSL_NO_DSA
+        p_UBSEC_dsa_sign_ioctl = NULL;
+        p_UBSEC_dsa_verify_ioctl = NULL;
+#endif
+        p_UBSEC_math_accelerate_ioctl = NULL;
+        p_UBSEC_rng_ioctl = NULL;
+        p_UBSEC_max_key_len_ioctl = NULL;
+
+        return 0;
+        }
+
+static int ubsec_finish(ENGINE *e)
+        {
+        if(ubsec_dso == NULL)
+                {
+                UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_NOT_LOADED);
+                return 0;
+                }
+        if(!DSO_free(ubsec_dso))
+                {
+                UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_DSO_FAILURE);
+                return 0;
+                }
+        ubsec_dso = NULL;
+        p_UBSEC_ubsec_bytes_to_bits = NULL;
+        p_UBSEC_ubsec_bits_to_bytes = NULL;
+        p_UBSEC_ubsec_open = NULL;
+        p_UBSEC_ubsec_close = NULL;
+#ifndef OPENSSL_NO_DH
+        p_UBSEC_diffie_hellman_generate_ioctl = NULL;
+        p_UBSEC_diffie_hellman_agree_ioctl = NULL;
+#endif
+#ifndef OPENSSL_NO_RSA
+        p_UBSEC_rsa_mod_exp_ioctl = NULL;
+        p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
+#endif
+#ifndef OPENSSL_NO_DSA
+        p_UBSEC_dsa_sign_ioctl = NULL;
+        p_UBSEC_dsa_verify_ioctl = NULL;
+#endif
+        p_UBSEC_math_accelerate_ioctl = NULL;
+        p_UBSEC_rng_ioctl = NULL;
+        p_UBSEC_max_key_len_ioctl = NULL;
+        return 1;
+        }
+
+static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
+        {
+        int initialised = ((ubsec_dso == NULL) ? 0 : 1);
+        switch(cmd)
+                {
+        case UBSEC_CMD_SO_PATH:
+                if(p == NULL)
+                        {
+                        UBSECerr(UBSEC_F_UBSEC_CTRL,ERR_R_PASSED_NULL_PARAMETER);
+                        return 0;
+                        }
+                if(initialised)
+                        {
+                        UBSECerr(UBSEC_F_UBSEC_CTRL,UBSEC_R_ALREADY_LOADED);
+                        return 0;
+                        }
+                UBSEC_LIBNAME = (const char *)p;
+                return 1;
+        default:
+                break;
+                }
+        UBSECerr(UBSEC_F_UBSEC_CTRL,UBSEC_R_CTRL_COMMAND_NOT_IMPLEMENTED);
+        return 0;
+        }
+
+static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+                const BIGNUM *m, BN_CTX *ctx)
+        {
+        int     y_len = 0;
+        int     fd;
+
+        if(ubsec_dso == NULL)
+        {
+                UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_NOT_LOADED);
+                return 0;
+        }
+
+        /* Check if hardware can't handle this argument. */
+        y_len = BN_num_bits(m);
+        if (y_len > max_key_len) {
+                UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
+                return BN_mod_exp(r, a, p, m, ctx);
+        } 
+
+        if(!bn_wexpand(r, m->top))
+        {
+                UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_BN_EXPAND_FAIL);
+                return 0;
+        }
+        memset(r->d, 0, BN_num_bytes(m));
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
+                fd = 0;
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                return BN_mod_exp(r, a, p, m, ctx);
+        }
+
+        if (p_UBSEC_rsa_mod_exp_ioctl(fd, (unsigned char *)a->d, BN_num_bits(a),
+                (unsigned char *)m->d, BN_num_bits(m), (unsigned char *)p->d, 
+                BN_num_bits(p), (unsigned char *)r->d, &y_len) != 0)
+        {
+                UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+
+                return BN_mod_exp(r, a, p, m, ctx);
+        }
+
+        p_UBSEC_ubsec_close(fd);
+
+        r->top = (BN_num_bits(m)+BN_BITS2-1)/BN_BITS2;
+        return 1;
+        }
+
+#ifndef OPENSSL_NO_RSA
+static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
+        {
+        BN_CTX *ctx;
+        int to_return = 0;
+
+        if((ctx = BN_CTX_new()) == NULL)
+                goto err;
+
+        if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
+                {
+                UBSECerr(UBSEC_F_UBSEC_RSA_MOD_EXP, UBSEC_R_MISSING_KEY_COMPONENTS);
+                goto err;
+                }
+
+        to_return = ubsec_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
+                    rsa->dmq1, rsa->iqmp, ctx);
+        if (to_return == FAIL_TO_SOFTWARE)
+        {
+          /*
+           * Do in software as hardware failed.
+           */
+           const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
+           to_return = (*meth->rsa_mod_exp)(r0, I, rsa);
+        }
+err:
+        if(ctx)
+                BN_CTX_free(ctx);
+        return to_return;
+        }
+#endif
+
+static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+                        const BIGNUM *q, const BIGNUM *dp,
+                        const BIGNUM *dq, const BIGNUM *qinv, BN_CTX *ctx)
+        {
+        int     y_len,
+                m_len,
+                fd;
+
+        m_len = BN_num_bytes(p) + BN_num_bytes(q) + 1;
+        y_len = BN_num_bits(p) + BN_num_bits(q);
+
+        /* Check if hardware can't handle this argument. */
+        if (y_len > max_key_len) {
+                UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
+                return FAIL_TO_SOFTWARE;
+        } 
+
+        if (!bn_wexpand(r, p->top + q->top + 1)) {
+                UBSECerr(UBSEC_F_UBSEC_RSA_MOD_EXP_CRT, UBSEC_R_BN_EXPAND_FAIL);
+                return 0;
+        }
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
+                fd = 0;
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                return FAIL_TO_SOFTWARE;
+        }
+
+        if (p_UBSEC_rsa_mod_exp_crt_ioctl(fd,
+                (unsigned char *)a->d, BN_num_bits(a), 
+                (unsigned char *)qinv->d, BN_num_bits(qinv),
+                (unsigned char *)dp->d, BN_num_bits(dp),
+                (unsigned char *)p->d, BN_num_bits(p),
+                (unsigned char *)dq->d, BN_num_bits(dq),
+                (unsigned char *)q->d, BN_num_bits(q),
+                (unsigned char *)r->d,  &y_len) != 0) {
+                UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+                return FAIL_TO_SOFTWARE;
+        }
+
+        p_UBSEC_ubsec_close(fd);
+
+        r->top = (BN_num_bits(p) + BN_num_bits(q) + BN_BITS2 - 1)/BN_BITS2;
+        return 1;
+}
+
+#ifndef OPENSSL_NO_DSA
+#if NOT_USED
+static int ubsec_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
+                BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
+                BN_CTX *ctx, BN_MONT_CTX *in_mont)
+        {
+        BIGNUM t;
+        int to_return = 0;
+ 
+        BN_init(&t);
+        /* let rr = a1 ^ p1 mod m */
+        if (!ubsec_mod_exp(rr,a1,p1,m,ctx)) goto end;
+        /* let t = a2 ^ p2 mod m */
+        if (!ubsec_mod_exp(&t,a2,p2,m,ctx)) goto end;
+        /* let rr = rr * t mod m */
+        if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end;
+        to_return = 1;
+end:
+        BN_free(&t);
+        return to_return;
+        }
+
+static int ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
+                const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
+                BN_MONT_CTX *m_ctx)
+        {
+        return ubsec_mod_exp(r, a, p, m, ctx);
+        }
+#endif
+#endif
+
+/*
+ * This function is aliased to mod_exp (with the mont stuff dropped).
+ */
+static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+                const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
+        {
+        int ret = 0;
+
+#ifndef OPENSSL_NO_RSA
+        /* Do in software if the key is too large for the hardware. */
+        if (BN_num_bits(m) > max_key_len)
+                {
+                const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
+                ret = (*meth->bn_mod_exp)(r, a, p, m, ctx, m_ctx);
+                }
+        else
+#endif
+                {
+                ret = ubsec_mod_exp(r, a, p, m, ctx);
+                }
+        
+        return ret;
+        }
+
+#ifndef OPENSSL_NO_DH
+/* This function is aliased to mod_exp (with the dh and mont dropped). */
+static int ubsec_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 ubsec_mod_exp(r, a, p, m, ctx);
+        }
+#endif
+
+#ifndef OPENSSL_NO_DSA
+static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
+        {
+        DSA_SIG *to_return = NULL;
+        int s_len = 160, r_len = 160, d_len, fd;
+        BIGNUM m, *r=NULL, *s=NULL;
+
+        BN_init(&m);
+
+        s = BN_new();
+        r = BN_new();
+        if ((s == NULL) || (r==NULL))
+                goto err;
+
+        d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dlen);
+
+        if(!bn_wexpand(r, (160+BN_BITS2-1)/BN_BITS2) ||
+           (!bn_wexpand(s, (160+BN_BITS2-1)/BN_BITS2))) {
+                UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_BN_EXPAND_FAIL);
+                goto err;
+        }
+
+        if (BN_bin2bn(dgst,dlen,&m) == NULL) {
+                UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_BN_EXPAND_FAIL);
+                goto err;
+        } 
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
+                const DSA_METHOD *meth;
+                fd = 0;
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                meth = DSA_OpenSSL();
+                to_return =  meth->dsa_do_sign(dgst, dlen, dsa);
+                goto err;
+        }
+
+        if (p_UBSEC_dsa_sign_ioctl(fd, 0, /* compute hash before signing */
+                (unsigned char *)dgst, d_len,
+                NULL, 0,  /* compute random value */
+                (unsigned char *)dsa->p->d, BN_num_bits(dsa->p), 
+                (unsigned char *)dsa->q->d, BN_num_bits(dsa->q),
+                (unsigned char *)dsa->g->d, BN_num_bits(dsa->g),
+                (unsigned char *)dsa->priv_key->d, BN_num_bits(dsa->priv_key),
+                (unsigned char *)r->d, &r_len,
+                (unsigned char *)s->d, &s_len ) != 0) {
+                const DSA_METHOD *meth;
+
+                UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+                meth = DSA_OpenSSL();
+                to_return = meth->dsa_do_sign(dgst, dlen, dsa);
+
+                goto err;
+        }
+
+        p_UBSEC_ubsec_close(fd);
+
+        r->top = (160+BN_BITS2-1)/BN_BITS2;
+        s->top = (160+BN_BITS2-1)/BN_BITS2;
+
+        to_return = DSA_SIG_new();
+        if(to_return == NULL) {
+                UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_BN_EXPAND_FAIL);
+                goto err;
+        }
+
+        to_return->r = r;
+        to_return->s = s;
+
+err:
+        if (!to_return) {
+                if (r) BN_free(r);
+                if (s) BN_free(s);
+        }                                 
+        BN_clear_free(&m);
+        return to_return;
+}
+
+static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
+                                DSA_SIG *sig, DSA *dsa)
+        {
+        int v_len, d_len;
+        int to_return = 0;
+        int fd;
+        BIGNUM v;
+
+        BN_init(&v);
+
+        if(!bn_wexpand(&v, dsa->p->top)) {
+                UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY ,UBSEC_R_BN_EXPAND_FAIL);
+                goto err;
+        }
+
+        v_len = BN_num_bits(dsa->p);
+
+        d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dgst_len);
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
+                const DSA_METHOD *meth;
+                fd = 0;
+                UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                meth = DSA_OpenSSL();
+                to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
+                goto err;
+        }
+
+        if (p_UBSEC_dsa_verify_ioctl(fd, 0, /* compute hash before signing */
+                (unsigned char *)dgst, d_len,
+                (unsigned char *)dsa->p->d, BN_num_bits(dsa->p), 
+                (unsigned char *)dsa->q->d, BN_num_bits(dsa->q),
+                (unsigned char *)dsa->g->d, BN_num_bits(dsa->g),
+                (unsigned char *)dsa->pub_key->d, BN_num_bits(dsa->pub_key),
+                (unsigned char *)sig->r->d, BN_num_bits(sig->r),
+                (unsigned char *)sig->s->d, BN_num_bits(sig->s),
+                (unsigned char *)v.d, &v_len) != 0) {
+                const DSA_METHOD *meth;
+                UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY , UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+
+                meth = DSA_OpenSSL();
+                to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
+
+                goto err;
+        }
+
+        p_UBSEC_ubsec_close(fd);
+
+        to_return = 1;
+err:
+        BN_clear_free(&v);
+        return to_return;
+        }
+#endif
+
+#ifndef OPENSSL_NO_DH
+static int ubsec_dh_compute_key (unsigned char *key,const BIGNUM *pub_key,DH *dh)
+        {
+        int      ret      = -1,
+                 k_len,
+                 fd;
+
+        k_len = BN_num_bits(dh->p);
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0)
+                {
+                const DH_METHOD *meth;
+                ENGINEerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                meth = DH_OpenSSL();
+                ret = meth->compute_key(key, pub_key, dh);
+                goto err;
+                }
+
+        if (p_UBSEC_diffie_hellman_agree_ioctl(fd,
+                                               (unsigned char *)dh->priv_key->d, BN_num_bits(dh->priv_key),
+                                               (unsigned char *)pub_key->d, BN_num_bits(pub_key),
+                                               (unsigned char *)dh->p->d, BN_num_bits(dh->p),
+                                               key, &k_len) != 0)
+                {
+                /* Hardware's a no go, failover to software */
+                const DH_METHOD *meth;
+                ENGINEerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+
+                meth = DH_OpenSSL();
+                ret = meth->compute_key(key, pub_key, dh);
+
+                goto err;
+                }
+
+        p_UBSEC_ubsec_close(fd);
+
+        ret = p_UBSEC_ubsec_bits_to_bytes(k_len);
+err:
+        return ret;
+        }
+
+static int ubsec_dh_generate_key (DH *dh)
+        {
+        int      ret               = 0,
+                 random_bits       = 0,
+                 pub_key_len       = 0,
+                 priv_key_len      = 0,
+                 fd;
+        BIGNUM   *pub_key          = NULL;
+        BIGNUM   *priv_key         = NULL;
+
+        /* 
+         *  How many bits should Random x be? dh_key.c
+         *  sets the range from 0 to num_bits(modulus) ???
+         */
+
+        if (dh->priv_key == NULL)
+                {
+                priv_key = BN_new();
+                if (priv_key == NULL) goto err;
+                priv_key_len = BN_num_bits(dh->p);
+                bn_wexpand(priv_key, dh->p->top);
+                do
+                        if (!BN_rand_range(priv_key, dh->p)) goto err;
+                while (BN_is_zero(priv_key));
+                random_bits = BN_num_bits(priv_key);
+                }
+        else
+                {
+                priv_key = dh->priv_key;
+                }
+
+        if (dh->pub_key == NULL)
+                {
+                pub_key = BN_new();
+                pub_key_len = BN_num_bits(dh->p);
+                bn_wexpand(pub_key, dh->p->top);
+                if(pub_key == NULL) goto err;
+                }
+        else
+                {
+                pub_key = dh->pub_key;
+                }
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0)
+                {
+                const DH_METHOD *meth;
+                ENGINEerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                meth = DH_OpenSSL();
+                ret = meth->generate_key(dh);
+                goto err;
+                }
+
+        if (p_UBSEC_diffie_hellman_generate_ioctl(fd,
+                                                  (unsigned char *)priv_key->d, &priv_key_len,
+                                                  (unsigned char *)pub_key->d,  &pub_key_len,
+                                                  (unsigned char *)dh->g->d, BN_num_bits(dh->g),
+                                                  (unsigned char *)dh->p->d, BN_num_bits(dh->p),
+                                                  0, 0, random_bits) != 0)
+                {
+                /* Hardware's a no go, failover to software */
+                const DH_METHOD *meth;
+
+                ENGINEerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+
+                meth = DH_OpenSSL();
+                ret = meth->generate_key(dh);
+
+                goto err;
+                }
+
+        p_UBSEC_ubsec_close(fd);
+
+        dh->pub_key = pub_key;
+        dh->pub_key->top = (pub_key_len + BN_BITS2-1) / BN_BITS2;
+        dh->priv_key = priv_key;
+        dh->priv_key->top = (priv_key_len + BN_BITS2-1) / BN_BITS2;
+
+        ret = 1;
+err:
+        return ret;
+        }
+#endif
+
+#if NOT_USED
+static int ubsec_rand_bytes(unsigned char * buf,
+                            int num)
+        {
+        int      ret      = 0,
+                 fd;
+
+        if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0)
+                {
+                const RAND_METHOD *meth;
+                ENGINEerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
+                num = p_UBSEC_ubsec_bits_to_bytes(num);
+                meth = RAND_SSLeay();
+                meth->seed(buf, num);
+                ret = meth->bytes(buf, num);
+                goto err;
+                }
+
+        num *= 8; /* bytes to bits */
+
+        if (p_UBSEC_rng_ioctl(fd,
+                              UBSEC_RNG_DIRECT,
+                              buf,
+                              &num) != 0)
+                {
+                /* Hardware's a no go, failover to software */
+                const RAND_METHOD *meth;
+
+                ENGINEerr(UBSEC_F_UBSEC_RNG_BYTES, UBSEC_R_REQUEST_FAILED);
+                p_UBSEC_ubsec_close(fd);
+
+                num = p_UBSEC_ubsec_bits_to_bytes(num);
+                meth = RAND_SSLeay();
+                meth->seed(buf, num);
+                ret = meth->bytes(buf, num);
+
+                goto err;
+                }
+
+        p_UBSEC_ubsec_close(fd);
+
+        ret = 1;
+err:
+        return(ret);
+        }
+
+
+static int ubsec_rand_status(void)
+        {
+        return 0;
+        }
+#endif
+
+/* This stuff is needed if this ENGINE is being compiled into a self-contained
+ * shared-library. */
+#ifdef ENGINE_DYNAMIC_SUPPORT
+static int bind_fn(ENGINE *e, const char *id)
+        {
+        if(id && (strcmp(id, engine_ubsec_id) != 0))
+                return 0;
+        if(!bind_helper(e))
+                return 0;
+        return 1;
+        }
+IMPLEMENT_DYNAMIC_CHECK_FN()
+IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
+#endif /* ENGINE_DYNAMIC_SUPPORT */
+
+#endif /* !OPENSSL_NO_HW_UBSEC */
+#endif /* !OPENSSL_NO_HW */