hw_ibmca.c

开源的ssl算法openssl,版本0.9.8H

/* crypto/engine/hw_ibmca.c */
/* Written by Geoff Thorpe ([e-mail]) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 1999 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]).
 *
 */

/* (C) COPYRIGHT International Business Machines Corp. 2001 */

#include <stdio.h>
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/engine.h>

#ifndef OPENSSL_NO_HW
#ifndef OPENSSL_NO_HW_IBMCA

#ifdef FLAT_INC
#include "ica_openssl_api.h"
#else
#include "vendor_defns/ica_openssl_api.h"
#endif

#define IBMCA_LIB_NAME "ibmca engine"
#include "hw_ibmca_err.c"

static int ibmca_destroy(ENGINE *e);
static int ibmca_init(ENGINE *e);
static int ibmca_finish(ENGINE *e);
static int ibmca_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());

static const char *IBMCA_F1 = "icaOpenAdapter";
static const char *IBMCA_F2 = "icaCloseAdapter";
static const char *IBMCA_F3 = "icaRsaModExpo";
static const char *IBMCA_F4 = "icaRandomNumberGenerate";
static const char *IBMCA_F5 = "icaRsaCrt";

ICA_ADAPTER_HANDLE handle=0;

/* BIGNUM stuff */
static int ibmca_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
        const BIGNUM *m, BN_CTX *ctx);

static int ibmca_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
        const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
        const BIGNUM *iqmp, BN_CTX *ctx);

#ifndef OPENSSL_NO_RSA  
/* RSA stuff */
static int ibmca_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
#endif

/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int ibmca_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 
/* DSA stuff */
static int ibmca_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 ibmca_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
        const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
        BN_MONT_CTX *m_ctx);
#endif

#ifndef OPENSSL_NO_DH 
/* DH stuff */
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int ibmca_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);
#endif

/* RAND stuff */
static int ibmca_rand_bytes(unsigned char *buf, int num);
static int ibmca_rand_status(void);


/* WJH - check for more commands, like in nuron */

/* The definitions for control commands specific to this engine */
#define IBMCA_CMD_SO_PATH		ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN ibmca_cmd_defns[] = {
	{IBMCA_CMD_SO_PATH,
		"SO_PATH",
		"Specifies the path to the 'atasi' 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 ibmca_rsa =
        {
        "Ibmca RSA method",
        NULL,
        NULL,
        NULL,
        NULL,
        ibmca_rsa_mod_exp,
        ibmca_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 ibmca_dsa =
        {
        "Ibmca DSA method",
        NULL, /* dsa_do_sign */
        NULL, /* dsa_sign_setup */
        NULL, /* dsa_do_verify */
        ibmca_dsa_mod_exp, /* dsa_mod_exp */
        ibmca_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 ibmca_dh =
        {
        "Ibmca DH method",
        NULL,
        NULL,
        ibmca_mod_exp_dh,
        NULL,
        NULL,
        0,
        NULL
        };
#endif

static RAND_METHOD ibmca_rand =
        {
        /* "IBMCA RAND method", */
        NULL,
        ibmca_rand_bytes,
        NULL,
        NULL,
        ibmca_rand_bytes,
        ibmca_rand_status,
        };

/* Constants used when creating the ENGINE */
static const char *engine_ibmca_id = "ibmca";
static const char *engine_ibmca_name = "Ibmca hardware engine support";

/* This internal function is used by ENGINE_ibmca() 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_DSA
	const DSA_METHOD *meth2;
#endif
#ifndef OPENSSL_NO_DH
	const DH_METHOD *meth3;
#endif
	if(!ENGINE_set_id(e, engine_ibmca_id) ||
		!ENGINE_set_name(e, engine_ibmca_name) ||
#ifndef OPENSSL_NO_RSA
		!ENGINE_set_RSA(e, &ibmca_rsa) ||
#endif
#ifndef OPENSSL_NO_DSA
		!ENGINE_set_DSA(e, &ibmca_dsa) ||
#endif
#ifndef OPENSSL_NO_DH
		!ENGINE_set_DH(e, &ibmca_dh) ||
#endif
		!ENGINE_set_RAND(e, &ibmca_rand) ||
		!ENGINE_set_destroy_function(e, ibmca_destroy) ||
		!ENGINE_set_init_function(e, ibmca_init) ||
		!ENGINE_set_finish_function(e, ibmca_finish) ||
		!ENGINE_set_ctrl_function(e, ibmca_ctrl) ||
		!ENGINE_set_cmd_defns(e, ibmca_cmd_defns))
		return 0;

#ifndef OPENSSL_NO_RSA
	/* We know that the "PKCS1_SSLeay()" functions hook properly
	 * to the ibmca-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();
	ibmca_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
	ibmca_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
	ibmca_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
	ibmca_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
#endif

#ifndef OPENSSL_NO_DSA
	/* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
	 * bits. */
	meth2 = DSA_OpenSSL();
	ibmca_dsa.dsa_do_sign = meth2->dsa_do_sign;
	ibmca_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
	ibmca_dsa.dsa_do_verify = meth2->dsa_do_verify;
#endif

#ifndef OPENSSL_NO_DH
	/* Much the same for Diffie-Hellman */
	meth3 = DH_OpenSSL();
	ibmca_dh.generate_key = meth3->generate_key;
	ibmca_dh.compute_key = meth3->compute_key;
#endif

	/* Ensure the ibmca error handling is set up */
	ERR_load_IBMCA_strings(); 
	return 1;
	}

static ENGINE *engine_ibmca(void)
	{
	ENGINE *ret = ENGINE_new();
	if(!ret)
		return NULL;
	if(!bind_helper(ret))
		{
		ENGINE_free(ret);
		return NULL;
		}
	return ret;
	}

#ifdef ENGINE_DYNAMIC_SUPPORT
static
#endif
void ENGINE_load_ibmca(void)
	{
	/* Copied from eng_[openssl|dyn].c */
	ENGINE *toadd = engine_ibmca();
	if(!toadd) return;
	ENGINE_add(toadd);
	ENGINE_free(toadd);
	ERR_clear_error();
	}

/* Destructor (complements the "ENGINE_ibmca()" constructor) */
static int ibmca_destroy(ENGINE *e)
	{
	/* Unload the ibmca error strings so any error state including our
	 * functs or reasons won't lead to a segfault (they simply get displayed
	 * without corresponding string data because none will be found). */
        ERR_unload_IBMCA_strings(); 
	return 1;
	}


/* This is a process-global DSO handle used for loading and unloading
 * the Ibmca 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 *ibmca_dso = NULL;

/* These are the function pointers that are (un)set when the library has
 * successfully (un)loaded. */

static unsigned int    (ICA_CALL *p_icaOpenAdapter)();
static unsigned int    (ICA_CALL *p_icaCloseAdapter)();
static unsigned int    (ICA_CALL *p_icaRsaModExpo)();
static unsigned int    (ICA_CALL *p_icaRandomNumberGenerate)();
static unsigned int    (ICA_CALL *p_icaRsaCrt)();

/* utility function to obtain a context */
static int get_context(ICA_ADAPTER_HANDLE *p_handle)
        {
        unsigned int status=0;

        status = p_icaOpenAdapter(0, p_handle);
        if(status != 0)
                return 0;
        return 1;
        }

/* similarly to release one. */
static void release_context(ICA_ADAPTER_HANDLE handle)
        {
        p_icaCloseAdapter(handle);
        }

/* (de)initialisation functions. */
static int ibmca_init(ENGINE *e)
        {

        void          (*p1)();
        void          (*p2)();
        void          (*p3)();
        void          (*p4)();
        void          (*p5)();

        if(ibmca_dso != NULL)
                {
                IBMCAerr(IBMCA_F_IBMCA_INIT,IBMCA_R_ALREADY_LOADED);
                goto err;
                }
        /* Attempt to load libatasi.so/atasi.dll/whatever. Needs to be
         * changed unfortunately because the Ibmca drivers don't have
         * standard library names that can be platform-translated well. */
        /* TODO: Work out how to actually map to the names the Ibmca
         * drivers really use - for now a symbollic link needs to be
         * created on the host system from libatasi.so to atasi.so on
         * unix variants. */

	/* WJH XXX check name translation */

        ibmca_dso = DSO_load(NULL, IBMCA_LIBNAME, NULL,
			     /* DSO_FLAG_NAME_TRANSLATION */ 0);
        if(ibmca_dso == NULL)
                {
                IBMCAerr(IBMCA_F_IBMCA_INIT,IBMCA_R_DSO_FAILURE);
                goto err;
                }

        if(!(p1 = DSO_bind_func(
                ibmca_dso, IBMCA_F1)) ||
                !(p2 = DSO_bind_func(
                        ibmca_dso, IBMCA_F2)) ||
                !(p3 = DSO_bind_func(
                        ibmca_dso, IBMCA_F3)) ||
                !(p4 = DSO_bind_func(
                        ibmca_dso, IBMCA_F4)) ||
                !(p5 = DSO_bind_func(
                        ibmca_dso, IBMCA_F5)))
                {
                IBMCAerr(IBMCA_F_IBMCA_INIT,IBMCA_R_DSO_FAILURE);
                goto err;
                }

        /* Copy the pointers */

	p_icaOpenAdapter =           (unsigned int (ICA_CALL *)())p1;
	p_icaCloseAdapter =          (unsigned int (ICA_CALL *)())p2;
	p_icaRsaModExpo =            (unsigned int (ICA_CALL *)())p3;
	p_icaRandomNumberGenerate =  (unsigned int (ICA_CALL *)())p4;
	p_icaRsaCrt =                (unsigned int (ICA_CALL *)())p5;

        if(!get_context(&handle))
                {
                IBMCAerr(IBMCA_F_IBMCA_INIT,IBMCA_R_UNIT_FAILURE);
                goto err;
                }

        return 1;
 err:
        if(ibmca_dso)
                DSO_free(ibmca_dso);

        p_icaOpenAdapter = NULL;
        p_icaCloseAdapter = NULL;
        p_icaRsaModExpo = NULL;
        p_icaRandomNumberGenerate = NULL;

        return 0;
        }

static int ibmca_finish(ENGINE *e)
        {
        if(ibmca_dso == NULL)
                {
                IBMCAerr(IBMCA_F_IBMCA_FINISH,IBMCA_R_NOT_LOADED);
                return 0;
                }
        release_context(handle);
        if(!DSO_free(ibmca_dso))
                {
                IBMCAerr(IBMCA_F_IBMCA_FINISH,IBMCA_R_DSO_FAILURE);
                return 0;
                }
        ibmca_dso = NULL;

        return 1;
        }

static int ibmca_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
	{
	int initialised = ((ibmca_dso == NULL) ? 0 : 1);
	switch(cmd)
		{
	case IBMCA_CMD_SO_PATH:
		if(p == NULL)
			{
			IBMCAerr(IBMCA_F_IBMCA_CTRL,ERR_R_PASSED_NULL_PARAMETER);
			return 0;
			}
		if(initialised)
			{
			IBMCAerr(IBMCA_F_IBMCA_CTRL,IBMCA_R_ALREADY_LOADED);
			return 0;
			}
		IBMCA_LIBNAME = (const char *)p;
		return 1;
	default:
		break;