e_ubsec.c

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/* crypto/engine/hw_ubsec.c */
/* Written by Geoff Thorpe ([e-mail]) 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
 *    [e-mail].
 *
 * 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
 * ([e-mail]).  This product includes software written by Tim
 * Hudson ([e-mail]).
 *
 */

#include <stdio.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/dso.h>
#include <openssl/engine.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#include <openssl/bn.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 "e_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)(void));
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, BN_CTX *ctx);
#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
#ifdef 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

#ifdef 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,
	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 */
	NULL, /* dsa_paramgen */
	NULL /* dsa_keygen */
	};
#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,
	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;
	}

#ifdef OPENSSL_NO_DYNAMIC_ENGINE
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();
	}
#endif

/* 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 = NULL;
static const char *get_UBSEC_LIBNAME(void)
	{
	if(UBSEC_LIBNAME)
		return UBSEC_LIBNAME;
	return "ubsec";
	}
static void free_UBSEC_LIBNAME(void)
	{
	if(UBSEC_LIBNAME)
		OPENSSL_free((void*)UBSEC_LIBNAME);
	UBSEC_LIBNAME = NULL;
	}
static long set_UBSEC_LIBNAME(const char *name)
	{
	free_UBSEC_LIBNAME();
	return (((UBSEC_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
	}
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