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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 */


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