openssl/demos/engines/cluster_labs/hw_cluster_labs.c

/* crypto/engine/hw_cluster_labs.c */
/* Written by Jan Tschirschwitz (jan.tschirschwitz@cluster-labs.com
 * 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
 *    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).
 *
 */

#define MSC_VER   /* only used cryptic.h */

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

#ifndef NO_HW
#ifndef NO_HW_CLUSTER_LABS

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

#define CL_LIB_NAME "cluster_labs engine"
#include "hw_cluster_labs_err.c"


static int cluster_labs_destroy(ENGINE *e);
static int cluster_labs_init(ENGINE *e);
static int cluster_labs_finish(ENGINE *e);
static int cluster_labs_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());


/* BIGNUM stuff */
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int cluster_labs_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
		const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
		
/* RSA stuff */
#ifndef OPENSSL_NO_RSA
static int cluster_labs_rsa_pub_enc(int flen, const unsigned char *from,
	     unsigned char *to, RSA *rsa, int padding);
static int cluster_labs_rsa_pub_dec(int flen, const unsigned char *from,
	     unsigned char *to, RSA *rsa, int padding);
static int cluster_labs_rsa_priv_enc(int flen, const unsigned char *from, 
		unsigned char *to, RSA *rsa, int padding);
static int cluster_labs_rsa_priv_dec(int flen, const unsigned char *from, 
		unsigned char *to, RSA *rsa, int padding);
static int cluster_labs_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
#endif

/* DSA stuff */
#ifndef OPENSSL_NO_DSA
static DSA_SIG *cluster_labs_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
static int cluster_labs_dsa_verify(const unsigned char *dgst, int dgst_len,
				DSA_SIG *sig, DSA *dsa);
static int cluster_labs_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 cluster_labs_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
		const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
		BN_MONT_CTX *m_ctx);
#endif
								
/* DH stuff */
#ifndef OPENSSL_NO_DH
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int cluster_labs_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
		
/* RANDOM stuff */						
static int cluster_labs_rand_bytes(unsigned char *buf, int num);

/* The definitions for control commands specific to this engine */
#define CLUSTER_LABS_CMD_SO_PATH		ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN cluster_labs_cmd_defns[] =
	{
	{ CLUSTER_LABS_CMD_SO_PATH,
	  "SO_PATH",
	  "Specifies the path to the 'cluster labs' shared library",
	  ENGINE_CMD_FLAG_STRING
	},
	{0, NULL, NULL, 0}
	};

/* Our internal RSA_METHOD that we provide pointers to */
#ifndef OPENSSL_NO_RSA
static RSA_METHOD cluster_labs_rsa =
	{
	"Cluster Labs RSA method",
	cluster_labs_rsa_pub_enc,	/* rsa_pub_enc */
	cluster_labs_rsa_pub_dec,	/* rsa_pub_dec */
	cluster_labs_rsa_priv_enc,	/* rsa_priv_enc */
	cluster_labs_rsa_priv_dec,	/* rsa_priv_dec */
	cluster_labs_rsa_mod_exp,	/* rsa_mod_exp */
	cluster_labs_mod_exp_mont,	/* bn_mod_exp */
	NULL,				/* init */
	NULL,				/* finish */
	0, 				/* flags */
	NULL,				/* apps_data */
	NULL,				/* rsa_sign */
	NULL				/* rsa_verify */
	};
#endif

/* Our internal DSA_METHOD that we provide pointers to */
#ifndef OPENSSL_NO_DSA
static DSA_METHOD cluster_labs_dsa =
	{
	"Cluster Labs DSA method",
	cluster_labs_dsa_sign,  	/* dsa_do_sign */
	NULL, 				/* dsa_sign_setup */
	cluster_labs_dsa_verify,	/* dsa_do_verify */
	cluster_labs_dsa_mod_exp, 	/* dsa_mod_exp */
	cluster_labs_mod_exp_dsa, 	/* bn_mod_exp */
	NULL, 				/* init */
	NULL, 				/* finish */
	0, 				/* flags */
	NULL 				/* app_data */
	};
#endif	

/* Our internal DH_METHOD that we provide pointers to */
#ifndef OPENSSL_NO_DH
static DH_METHOD cluster_labs_dh =
	{
	"Cluster Labs DH method",
	NULL,				/* generate key */
	NULL,				/* compute key */
	cluster_labs_mod_exp_dh,	/* bn_mod_exp */
	NULL,				/* init */
	NULL,				/* finish */
	0,				/* flags */
	NULL				/* app_data */
	};
#endif	
	
static RAND_METHOD cluster_labs_rand =
	{
	/* "Cluster Labs RAND method", */
	NULL,				/* seed */
	cluster_labs_rand_bytes,	/* bytes */
	NULL,				/* cleanup */
	NULL,				/* add */
	cluster_labs_rand_bytes,	/* pseudorand */
	NULL,				/* status */
	};	

static const char *engine_cluster_labs_id = "cluster_labs";
static const char *engine_cluster_labs_name = "Cluster Labs hardware engine support";

/* engine implementation */
/*-----------------------*/
static int bind_helper(ENGINE *e)
	{
	
	if(!ENGINE_set_id(e, engine_cluster_labs_id) ||
			!ENGINE_set_name(e, engine_cluster_labs_name) ||
#ifndef OPENSSL_NO_RSA
			!ENGINE_set_RSA(e, &cluster_labs_rsa) ||
#endif
#ifndef OPENSSL_NO_DSA
			!ENGINE_set_DSA(e, &cluster_labs_dsa) ||
#endif
#ifndef OPENSSL_NO_DH
			!ENGINE_set_DH(e, &cluster_labs_dh) ||
#endif
			!ENGINE_set_RAND(e, &cluster_labs_rand) ||
			!ENGINE_set_destroy_function(e, cluster_labs_destroy) ||
			!ENGINE_set_init_function(e, cluster_labs_init) ||
			!ENGINE_set_finish_function(e, cluster_labs_finish) ||
			!ENGINE_set_ctrl_function(e, cluster_labs_ctrl) ||
			!ENGINE_set_cmd_defns(e, cluster_labs_cmd_defns))
		return 0;
	/* Ensure the error handling is set up */
	ERR_load_CL_strings();
	return 1;
	}
	
#ifndef ENGINE_DYNAMIC_SUPPORT
static ENGINE *engine_cluster_labs(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_cluster_labs(void)
	{

	ENGINE *cluster_labs = engine_cluster_labs();
	
	if(!cluster_labs) return;
	ENGINE_add(cluster_labs);
	ENGINE_free(cluster_labs);
	ERR_clear_error();
	}
#endif /* !ENGINE_DYNAMIC_SUPPORT */

static int cluster_labs_destroy(ENGINE *e)
	{
	
	ERR_unload_CL_strings();
	return 1;
	}



/* This is a process-global DSO handle used for loading and unloading
 * the Cluster Labs 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 *cluster_labs_dso = NULL;

/* These are the function pointers that are (un)set when the library has
 * successfully (un)loaded. */
static cl_engine_init	  	*p_cl_engine_init 		 = NULL;
static cl_mod_exp	 	*p_cl_mod_exp 			 = NULL;
static cl_mod_exp_crt		*p_cl_mod_exp_crt 		 = NULL;
static cl_rsa_mod_exp		*p_cl_rsa_mod_exp 		 = NULL;
static cl_rsa_priv_enc		*p_cl_rsa_priv_enc 		 = NULL;
static cl_rsa_priv_dec		*p_cl_rsa_priv_dec 		 = NULL;
static cl_rsa_pub_enc		*p_cl_rsa_pub_enc 		 = NULL;
static cl_rsa_pub_dec		*p_cl_rsa_pub_dec 		 = NULL;
static cl_rand_bytes		*p_cl_rand_bytes	 	 = NULL;
static cl_dsa_sign		*p_cl_dsa_sign		 	 = NULL;
static cl_dsa_verify		*p_cl_dsa_verify	 	 = NULL;


int cluster_labs_init(ENGINE *e)
	{

	cl_engine_init			*p1;
	cl_mod_exp			*p2;
	cl_mod_exp_crt			*p3;
	cl_rsa_mod_exp			*p4;
	cl_rsa_priv_enc			*p5;
	cl_rsa_priv_dec			*p6;	
	cl_rsa_pub_enc			*p7;
	cl_rsa_pub_dec			*p8;
	cl_rand_bytes			*p20;
	cl_dsa_sign			*p30;	
	cl_dsa_verify			*p31;		
	
	/* engine already loaded */
	if(cluster_labs_dso != NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_INIT,CL_R_ALREADY_LOADED);
		goto err;
		}
	/* try to load engine	 */	
	cluster_labs_dso = DSO_load(NULL, CLUSTER_LABS_LIB_NAME, NULL,0);
	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_INIT,CL_R_DSO_FAILURE);
		goto err;
		}
	/* bind functions */
	if(	!(p1 = (cl_engine_init *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F1)) ||
		!(p2 = (cl_mod_exp *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F2)) ||			
		!(p3 = (cl_mod_exp_crt *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F3)) ||				
		!(p4 = (cl_rsa_mod_exp *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F4)) ||				
		!(p5 = (cl_rsa_priv_enc *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F5)) ||
		!(p6 = (cl_rsa_priv_dec *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F6)) ||
		!(p7 = (cl_rsa_pub_enc *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F7)) ||
		!(p8 = (cl_rsa_pub_dec *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F8)) ||
		!(p20= (cl_rand_bytes *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F20)) ||
		!(p30= (cl_dsa_sign *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F30)) ||
		!(p31= (cl_dsa_verify *)DSO_bind_func(
				cluster_labs_dso, CLUSTER_LABS_F31)))
		{
		CLerr(CL_F_CLUSTER_LABS_INIT,CL_R_DSO_FAILURE);
		goto err;
		}
		
	/* copy function pointers */
	p_cl_engine_init		= p1;
	p_cl_mod_exp			= p2;
	p_cl_mod_exp_crt		= p3;	
	p_cl_rsa_mod_exp 		= p4;
	p_cl_rsa_priv_enc	 	= p5;
	p_cl_rsa_priv_dec	 	= p6;
	p_cl_rsa_pub_enc	 	= p7;
	p_cl_rsa_pub_dec	 	= p8;
	p_cl_rand_bytes			= p20;	
	p_cl_dsa_sign			= p30;
	p_cl_dsa_verify			= p31;	
	
	
	
	/* cluster labs engine init */
	if(p_cl_engine_init()== 0){
		CLerr(CL_F_CLUSTER_LABS_INIT,CL_R_INIT_FAILED);		
		goto err;
	}

	return(1);

err:	
	/* reset all pointers */
	if(cluster_labs_dso)
		DSO_free(cluster_labs_dso);

	cluster_labs_dso		= NULL;
	p_cl_engine_init		= NULL;	
	p_cl_mod_exp			= NULL;
	p_cl_mod_exp_crt		= NULL;
	p_cl_rsa_mod_exp		= NULL;
	p_cl_rsa_priv_enc		= NULL;
	p_cl_rsa_priv_dec		= NULL;	
	p_cl_rsa_pub_enc		= NULL;
	p_cl_rsa_pub_dec		= NULL;	
	p_cl_rand_bytes			= NULL;	
	p_cl_dsa_sign			= NULL;
	p_cl_dsa_verify			= NULL;	
	
	return(0);
	}
	

static int cluster_labs_finish(ENGINE *e)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_FINISH,CL_R_NOT_LOADED);
		return 0;
		}
	if(!DSO_free(cluster_labs_dso))
		{
		CLerr(CL_F_CLUSTER_LABS_FINISH,CL_R_DSO_FAILURE);
		return 0;
		}
		
	cluster_labs_dso 		= NULL;
	p_cl_engine_init		= NULL;		
	p_cl_mod_exp			= NULL;
	p_cl_rsa_mod_exp		= NULL;	
	p_cl_mod_exp_crt		= NULL;	
	p_cl_rsa_priv_enc		= NULL;	
	p_cl_rsa_priv_dec		= NULL;	
	p_cl_rsa_pub_enc		= NULL;
	p_cl_rsa_pub_dec		= NULL;	
	p_cl_rand_bytes			= NULL;		
	p_cl_dsa_sign			= NULL;
	p_cl_dsa_verify			= NULL;	
	
	return(1);	
	
	}
	
static int cluster_labs_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
	{
	int initialised = ((cluster_labs_dso == NULL) ? 0 : 1);

	switch(cmd)
		{
	case CLUSTER_LABS_CMD_SO_PATH:
		if(p == NULL)
			{
			CLerr(CL_F_CLUSTER_LABS_CTRL,ERR_R_PASSED_NULL_PARAMETER);
			return 0;
			}
		if(initialised)
			{
			CLerr(CL_F_CLUSTER_LABS_CTRL,CL_R_ALREADY_LOADED);
			return 0;
			}
		CLUSTER_LABS_LIB_NAME = (const char *)p;
		return 1;
	default:
		break;
		}
	CLerr(CL_F_CLUSTER_LABS_CTRL,CL_R_COMMAND_NOT_IMPLEMENTED);
	return 0;
	}
	

static int cluster_labs_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
		const BIGNUM *m, BN_CTX *ctx)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_MOD_EXP,CL_R_NOT_LOADED);
		return 0;
		}	
	if(p_cl_mod_exp == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_MOD_EXP,CL_R_FUNCTION_NOT_BINDED);
		return 0;
		}

	return	p_cl_mod_exp(r, a, p, m, ctx);

	}
	
static int cluster_labs_mod_exp_crt(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
		const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
		const BIGNUM *iqmp, BN_CTX *ctx)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_MOD_EXP_CRT,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_mod_exp_crt == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_MOD_EXP_CRT,CL_R_FUNCTION_NOT_BINDED);		
		return 0;
		}
	
	return	p_cl_mod_exp_crt(r, a, p, q,dmp1, dmq1, iqmp, ctx);
	
	}
	
static int cluster_labs_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_MOD_EXP,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_rsa_mod_exp == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_MOD_EXP,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}

	return p_cl_rsa_mod_exp(r0, I, rsa);

	}
	
static DSA_SIG *cluster_labs_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_DSA_SIGN,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_dsa_sign == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_DSA_SIGN,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}

	return p_cl_dsa_sign(dgst, dlen, dsa);
	
	}
	
static int cluster_labs_dsa_verify(const unsigned char *dgst, int dgst_len,
				DSA_SIG *sig, DSA *dsa)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_DSA_VERIFY,CL_R_NOT_LOADED);		
		return 0;
		}
	
	if(p_cl_dsa_verify == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_DSA_VERIFY,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}

	return p_cl_dsa_verify(dgst, dgst_len, sig, dsa);
	
	}			

static int cluster_labs_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 status = 0;
		
	BN_init(&t);
	/* let rr = a1 ^ p1 mod m */
	if (!cluster_labs_mod_exp(rr,a1,p1,m,ctx)) goto end;
	/* let t = a2 ^ p2 mod m */
	if (!cluster_labs_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;
	status = 1;
end:
	BN_free(&t);
	
	return(1);

	}

static int cluster_labs_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
		const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
		BN_MONT_CTX *m_ctx)
	{
	return 	cluster_labs_mod_exp(r, a, p, m, ctx);
	}
	
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int cluster_labs_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
		const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
	{
	return	cluster_labs_mod_exp(r, a, p, m, ctx);
	}
	

/* This function is aliased to mod_exp (with the dh and mont dropped). */
static int cluster_labs_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 	cluster_labs_mod_exp(r, a, p, m, ctx);
	}


static int cluster_labs_rsa_pub_enc(int flen, const unsigned char *from,
	     unsigned char *to, RSA *rsa, int padding)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PUB_ENC,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_rsa_priv_enc == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PUB_ENC,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}
		
	return 	p_cl_rsa_pub_enc(flen, from, to, rsa, padding);
	
	}  
	     
static int cluster_labs_rsa_pub_dec(int flen, const unsigned char *from,
	     unsigned char *to, RSA *rsa, int padding)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PUB_DEC,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_rsa_priv_enc == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PUB_DEC,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}
		
	return 	p_cl_rsa_pub_dec(flen, from, to, rsa, padding);
	
	}  


static int cluster_labs_rsa_priv_enc(int flen, const unsigned char *from, 
		unsigned char *to, RSA *rsa, int padding)
	{

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PRIV_ENC,CL_R_NOT_LOADED);		
		return 0;
		}

	if(p_cl_rsa_priv_enc == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PRIV_ENC,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}
		
	return 	p_cl_rsa_priv_enc(flen, from, to, rsa, padding);
	
	}  

static int cluster_labs_rsa_priv_dec(int flen, const unsigned char *from, 
		unsigned char *to, RSA *rsa, int padding)
	{
	
	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PRIV_DEC,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_rsa_priv_dec == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RSA_PRIV_DEC,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}

	return 	p_cl_rsa_priv_dec(flen, from, to, rsa, padding);
		
	}  

/************************************************************************************
* Symmetric algorithms
************************************************************************************/
/* this will be come soon! */

/************************************************************************************
* Random generator
************************************************************************************/

static int cluster_labs_rand_bytes(unsigned char *buf, int num){

	if(cluster_labs_dso == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RAND_BYTES,CL_R_NOT_LOADED);		
		return 0;
		}
	if(p_cl_mod_exp_crt == NULL)
		{
		CLerr(CL_F_CLUSTER_LABS_RAND_BYTES,CL_R_FUNCTION_NOT_BINDED);				
		return 0;
		}

	return 	p_cl_rand_bytes(buf, num);

}


/* 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)
	{
	fprintf(stderr, "bind_fn CLUSTER_LABS\n");
	if(id && (strcmp(id, engine_cluster_labs_id) != 0)) {
		fprintf(stderr, "bind_fn return(0) first\n");
		return 0;
		}
	if(!bind_helper(e)) {
		fprintf(stderr, "bind_fn return(1) first\n");
		return 0;
		}
	fprintf(stderr, "bind_fn return(1)\n");		
	return 1;
	}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
#endif /* ENGINE_DYNAMIC_SUPPORT */
						
#endif /* !NO_HW_CLUSTER_LABS */
#endif /* !NO_HW */