This commit was generated by cvs2svn to compensate for changes in r160814,

which included commits to RCS files with non-trunk default branches.

1 files changed, 1137 insertions, 0 deletions

diff --git a/crypto/openssl/engines/e_aep.c b/crypto/openssl/engines/e_aep.c
new file mode 100644
index 0000000..7307ddf
--- /dev/null
+++ b/crypto/openssl/engines/e_aep.c
@@ -0,0 +1,1137 @@
+/* ====================================================================
+ * 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).
+ *
+ */
+
+#include <stdio.h>
+#include <openssl/bn.h>
+#include <string.h>
+
+#include <openssl/e_os2.h>
+#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
+#include <sys/types.h>
+#include <unistd.h>
+#else
+#include <process.h>
+typedef int pid_t;
+#endif
+
+#include <openssl/crypto.h>
+#include <openssl/dso.h>
+#include <openssl/engine.h>
+#include <openssl/buffer.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_AEP
+#ifdef FLAT_INC
+#include "aep.h"
+#else
+#include "vendor_defns/aep.h"
+#endif
+
+#define AEP_LIB_NAME "aep engine"
+#define FAIL_TO_SW 0x10101010
+
+#include "e_aep_err.c"
+
+static int aep_init(ENGINE *e);
+static int aep_finish(ENGINE *e);
+static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
+static int aep_destroy(ENGINE *e);
+
+static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR hConnection);
+static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection);
+static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection);
+static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use);
+
+/* BIGNUM stuff */
+#ifndef OPENSSL_NO_RSA
+static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+	const BIGNUM *m, BN_CTX *ctx);
+
+static AEP_RV aep_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);
+#endif
+
+/* RSA stuff */
+#ifndef OPENSSL_NO_RSA
+static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
+#endif
+
+/* This function is aliased to mod_exp (with the mont stuff dropped). */
+#ifndef OPENSSL_NO_RSA
+static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+	const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
+#endif
+
+/* DSA stuff */
+#ifndef OPENSSL_NO_DSA
+static int aep_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 aep_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 */
+/* This function is aliased to mod_exp (with the DH and mont dropped). */
+#ifndef OPENSSL_NO_DH
+static int aep_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   */
+#ifdef AEPRAND
+static int aep_rand(unsigned char *buf, int num);
+static int aep_rand_status(void);
+#endif
+
+/* Bignum conversion stuff */
+static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize);
+static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
+	unsigned char* AEP_BigNum);
+static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
+	unsigned char* AEP_BigNum);
+
+/* The definitions for control commands specific to this engine */
+#define AEP_CMD_SO_PATH		ENGINE_CMD_BASE
+static const ENGINE_CMD_DEFN aep_cmd_defns[] =
+	{
+	{ AEP_CMD_SO_PATH,
+	  "SO_PATH",
+	  "Specifies the path to the 'aep' 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 aep_rsa =
+	{
+	"Aep RSA method",
+	NULL,                /*rsa_pub_encrypt*/
+	NULL,                /*rsa_pub_decrypt*/
+	NULL,                /*rsa_priv_encrypt*/
+	NULL,                /*rsa_priv_encrypt*/
+	aep_rsa_mod_exp,     /*rsa_mod_exp*/
+	aep_mod_exp_mont,    /*bn_mod_exp*/
+	NULL,                /*init*/
+	NULL,                /*finish*/
+	0,                   /*flags*/
+	NULL,                /*app_data*/
+	NULL,                /*rsa_sign*/
+	NULL,                /*rsa_verify*/
+	NULL                 /*rsa_keygen*/
+	};
+#endif
+
+#ifndef OPENSSL_NO_DSA
+/* Our internal DSA_METHOD that we provide pointers to */
+static DSA_METHOD aep_dsa =
+	{
+	"Aep DSA method",
+	NULL,                /* dsa_do_sign */
+	NULL,                /* dsa_sign_setup */
+	NULL,                /* dsa_do_verify */
+	aep_dsa_mod_exp,     /* dsa_mod_exp */
+	aep_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 aep_dh =
+	{
+	"Aep DH method",
+	NULL,
+	NULL,
+	aep_mod_exp_dh,
+	NULL,
+	NULL,
+	0,
+	NULL,
+	NULL
+	};
+#endif
+
+#ifdef AEPRAND
+/* our internal RAND_method that we provide pointers to  */
+static RAND_METHOD aep_random =
+	{
+	/*"AEP RAND method", */
+	NULL,
+	aep_rand,
+	NULL,
+	NULL,
+	aep_rand,
+	aep_rand_status,
+	};
+#endif
+
+/*Define an array of structures to hold connections*/
+static AEP_CONNECTION_ENTRY aep_app_conn_table[MAX_PROCESS_CONNECTIONS];
+
+/*Used to determine if this is a new process*/
+static pid_t    recorded_pid = 0;
+
+#ifdef AEPRAND
+static AEP_U8   rand_block[RAND_BLK_SIZE];
+static AEP_U32  rand_block_bytes = 0;
+#endif
+
+/* Constants used when creating the ENGINE */
+static const char *engine_aep_id = "aep";
+static const char *engine_aep_name = "Aep hardware engine support";
+
+static int max_key_len = 2176;
+
+
+/* This internal function is used by ENGINE_aep() and possibly by the
+ * "dynamic" ENGINE support too */
+static int bind_aep(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_aep_id) ||
+		!ENGINE_set_name(e, engine_aep_name) ||
+#ifndef OPENSSL_NO_RSA
+		!ENGINE_set_RSA(e, &aep_rsa) ||
+#endif
+#ifndef OPENSSL_NO_DSA
+		!ENGINE_set_DSA(e, &aep_dsa) ||
+#endif
+#ifndef OPENSSL_NO_DH
+		!ENGINE_set_DH(e, &aep_dh) ||
+#endif
+#ifdef AEPRAND
+		!ENGINE_set_RAND(e, &aep_random) ||
+#endif
+		!ENGINE_set_init_function(e, aep_init) ||
+		!ENGINE_set_destroy_function(e, aep_destroy) ||
+		!ENGINE_set_finish_function(e, aep_finish) ||
+		!ENGINE_set_ctrl_function(e, aep_ctrl) ||
+		!ENGINE_set_cmd_defns(e, aep_cmd_defns))
+		return 0;
+
+#ifndef OPENSSL_NO_RSA
+	/* We know that the "PKCS1_SSLeay()" functions hook properly
+	 * to the aep-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();
+	aep_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
+	aep_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
+	aep_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
+	aep_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();
+	aep_dsa.dsa_do_sign    = meth2->dsa_do_sign;
+	aep_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
+	aep_dsa.dsa_do_verify  = meth2->dsa_do_verify;
+
+	aep_dsa = *DSA_get_default_method(); 
+	aep_dsa.dsa_mod_exp = aep_dsa_mod_exp; 
+	aep_dsa.bn_mod_exp = aep_mod_exp_dsa;
+#endif
+
+#ifndef OPENSSL_NO_DH
+	/* Much the same for Diffie-Hellman */
+	meth3 = DH_OpenSSL();
+	aep_dh.generate_key = meth3->generate_key;
+	aep_dh.compute_key  = meth3->compute_key;
+	aep_dh.bn_mod_exp   = meth3->bn_mod_exp;
+#endif
+
+	/* Ensure the aep error handling is set up */
+	ERR_load_AEPHK_strings();
+
+	return 1;
+}
+
+#ifndef OPENSSL_NO_DYNAMIC_ENGINE
+static int bind_helper(ENGINE *e, const char *id)
+	{
+	if(id && (strcmp(id, engine_aep_id) != 0))
+		return 0;
+	if(!bind_aep(e))
+		return 0;
+	return 1;
+	}       
+IMPLEMENT_DYNAMIC_CHECK_FN()
+IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
+#else
+static ENGINE *engine_aep(void)
+	{
+	ENGINE *ret = ENGINE_new();
+	if(!ret)
+		return NULL;
+	if(!bind_aep(ret))
+		{
+		ENGINE_free(ret);
+		return NULL;
+		}
+	return ret;
+	}
+
+void ENGINE_load_aep(void)
+	{
+	/* Copied from eng_[openssl|dyn].c */
+	ENGINE *toadd = engine_aep();
+	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 Aep 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 *aep_dso = NULL;
+
+/* These are the static string constants for the DSO file name and the function
+ * symbol names to bind to. 
+*/
+static const char *AEP_LIBNAME = NULL;
+static const char *get_AEP_LIBNAME(void)
+	{
+	if(AEP_LIBNAME)
+		return AEP_LIBNAME;
+	return "aep";
+	}
+static void free_AEP_LIBNAME(void)
+	{
+	if(AEP_LIBNAME)
+		OPENSSL_free((void*)AEP_LIBNAME);
+	AEP_LIBNAME = NULL;
+	}
+static long set_AEP_LIBNAME(const char *name)
+	{
+	free_AEP_LIBNAME();
+	return ((AEP_LIBNAME = BUF_strdup(name)) != NULL ? 1 : 0);
+	}
+
+static const char *AEP_F1    = "AEP_ModExp";
+static const char *AEP_F2    = "AEP_ModExpCrt";
+#ifdef AEPRAND
+static const char *AEP_F3    = "AEP_GenRandom";
+#endif
+static const char *AEP_F4    = "AEP_Finalize";
+static const char *AEP_F5    = "AEP_Initialize";
+static const char *AEP_F6    = "AEP_OpenConnection";
+static const char *AEP_F7    = "AEP_SetBNCallBacks";
+static const char *AEP_F8    = "AEP_CloseConnection";
+
+/* These are the function pointers that are (un)set when the library has
+ * successfully (un)loaded. */
+static t_AEP_OpenConnection    *p_AEP_OpenConnection  = NULL;
+static t_AEP_CloseConnection   *p_AEP_CloseConnection = NULL;
+static t_AEP_ModExp            *p_AEP_ModExp          = NULL;
+static t_AEP_ModExpCrt         *p_AEP_ModExpCrt       = NULL;
+#ifdef AEPRAND
+static t_AEP_GenRandom         *p_AEP_GenRandom       = NULL;
+#endif
+static t_AEP_Initialize        *p_AEP_Initialize      = NULL;
+static t_AEP_Finalize          *p_AEP_Finalize        = NULL;
+static t_AEP_SetBNCallBacks    *p_AEP_SetBNCallBacks  = NULL;
+
+/* (de)initialisation functions. */
+static int aep_init(ENGINE *e)
+	{
+	t_AEP_ModExp          *p1;
+	t_AEP_ModExpCrt       *p2;
+#ifdef AEPRAND
+	t_AEP_GenRandom       *p3;
+#endif
+	t_AEP_Finalize        *p4;
+	t_AEP_Initialize      *p5;
+	t_AEP_OpenConnection  *p6;
+	t_AEP_SetBNCallBacks  *p7;
+	t_AEP_CloseConnection *p8;
+
+	int to_return = 0;
+ 
+	if(aep_dso != NULL)
+		{
+		AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_ALREADY_LOADED);
+		goto err;
+		}
+	/* Attempt to load libaep.so. */
+
+	aep_dso = DSO_load(NULL, get_AEP_LIBNAME(), NULL, 0);
+  
+	if(aep_dso == NULL)
+		{
+		AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_NOT_LOADED);
+		goto err;
+		}
+
+	if(	!(p1 = (t_AEP_ModExp *)     DSO_bind_func( aep_dso,AEP_F1))  ||
+		!(p2 = (t_AEP_ModExpCrt*)   DSO_bind_func( aep_dso,AEP_F2))  ||
+#ifdef AEPRAND
+		!(p3 = (t_AEP_GenRandom*)   DSO_bind_func( aep_dso,AEP_F3))  ||
+#endif
+		!(p4 = (t_AEP_Finalize*)    DSO_bind_func( aep_dso,AEP_F4))  ||
+		!(p5 = (t_AEP_Initialize*)  DSO_bind_func( aep_dso,AEP_F5))  ||
+		!(p6 = (t_AEP_OpenConnection*) DSO_bind_func( aep_dso,AEP_F6))  ||
+		!(p7 = (t_AEP_SetBNCallBacks*) DSO_bind_func( aep_dso,AEP_F7))  ||
+		!(p8 = (t_AEP_CloseConnection*) DSO_bind_func( aep_dso,AEP_F8)))
+		{
+		AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_NOT_LOADED);
+		goto err;
+		}
+
+	/* Copy the pointers */
+  
+	p_AEP_ModExp           = p1;
+	p_AEP_ModExpCrt        = p2;
+#ifdef AEPRAND
+	p_AEP_GenRandom        = p3;
+#endif
+	p_AEP_Finalize         = p4;
+	p_AEP_Initialize       = p5;
+	p_AEP_OpenConnection   = p6;
+	p_AEP_SetBNCallBacks   = p7;
+	p_AEP_CloseConnection  = p8;
+ 
+	to_return = 1;
+ 
+	return to_return;
+
+ err: 
+
+	if(aep_dso)
+		DSO_free(aep_dso);
+	aep_dso = NULL;
+		
+	p_AEP_OpenConnection    = NULL;
+	p_AEP_ModExp            = NULL;
+	p_AEP_ModExpCrt         = NULL;
+#ifdef AEPRAND
+	p_AEP_GenRandom         = NULL;
+#endif
+	p_AEP_Initialize        = NULL;
+	p_AEP_Finalize          = NULL;
+	p_AEP_SetBNCallBacks    = NULL;
+	p_AEP_CloseConnection   = NULL;
+
+	return to_return;
+	}
+
+/* Destructor (complements the "ENGINE_aep()" constructor) */
+static int aep_destroy(ENGINE *e)
+	{
+	free_AEP_LIBNAME();
+	ERR_unload_AEPHK_strings();
+	return 1;
+	}
+
+static int aep_finish(ENGINE *e)
+	{
+	int to_return = 0, in_use;
+	AEP_RV rv;
+
+	if(aep_dso == NULL)
+		{
+		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_NOT_LOADED);
+		goto err;
+		}
+
+	rv = aep_close_all_connections(0, &in_use);
+	if (rv != AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CLOSE_HANDLES_FAILED);
+		goto err;
+		}
+	if (in_use)
+		{
+		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CONNECTIONS_IN_USE);
+		goto err;
+		}
+
+	rv = p_AEP_Finalize();
+	if (rv != AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_FINALIZE_FAILED);
+		goto err;
+		}
+
+	if(!DSO_free(aep_dso))
+		{
+		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_UNIT_FAILURE);
+		goto err;
+		}
+
+	aep_dso = NULL;
+	p_AEP_CloseConnection   = NULL;
+	p_AEP_OpenConnection    = NULL;
+	p_AEP_ModExp            = NULL;
+	p_AEP_ModExpCrt         = NULL;
+#ifdef AEPRAND
+	p_AEP_GenRandom         = NULL;
+#endif
+	p_AEP_Initialize        = NULL;
+	p_AEP_Finalize          = NULL;
+	p_AEP_SetBNCallBacks    = NULL;
+
+	to_return = 1;
+ err:
+	return to_return;
+	}
+
+static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
+	{
+	int initialised = ((aep_dso == NULL) ? 0 : 1);
+	switch(cmd)
+		{
+	case AEP_CMD_SO_PATH:
+		if(p == NULL)
+			{
+			AEPHKerr(AEPHK_F_AEP_CTRL,
+				ERR_R_PASSED_NULL_PARAMETER);
+			return 0;
+			}
+		if(initialised)
+			{
+			AEPHKerr(AEPHK_F_AEP_CTRL,
+				AEPHK_R_ALREADY_LOADED);
+			return 0;
+			}
+		return set_AEP_LIBNAME((const char*)p);
+	default:
+		break;
+		}
+	AEPHKerr(AEPHK_F_AEP_CTRL,AEPHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
+	return 0;
+	}
+
+static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+	const BIGNUM *m, BN_CTX *ctx)
+	{
+	int to_return = 0;
+	int 	r_len = 0;
+	AEP_CONNECTION_HNDL hConnection;
+	AEP_RV rv;
+	
+	r_len = BN_num_bits(m);
+
+	/* Perform in software if modulus is too large for hardware. */
+
+	if (r_len > max_key_len){
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
+		return BN_mod_exp(r, a, p, m, ctx);
+	} 
+
+	/*Grab a connection from the pool*/
+	rv = aep_get_connection(&hConnection);
+	if (rv != AEP_R_OK)
+		{     
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_GET_HANDLE_FAILED);
+		return BN_mod_exp(r, a, p, m, ctx);
+		}
+
+	/*To the card with the mod exp*/
+	rv = p_AEP_ModExp(hConnection,(void*)a, (void*)p,(void*)m, (void*)r,NULL);
+
+	if (rv !=  AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_MOD_EXP_FAILED);
+		rv = aep_close_connection(hConnection);
+		return BN_mod_exp(r, a, p, m, ctx);
+		}
+
+	/*Return the connection to the pool*/
+	rv = aep_return_connection(hConnection);
+	if (rv != AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_RETURN_CONNECTION_FAILED); 
+		goto err;
+		}
+
+	to_return = 1;
+ err:
+	return to_return;
+	}
+	
+#ifndef OPENSSL_NO_RSA
+static AEP_RV aep_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)
+	{
+	AEP_RV rv = AEP_R_OK;
+	AEP_CONNECTION_HNDL hConnection;
+
+	/*Grab a connection from the pool*/
+	rv = aep_get_connection(&hConnection);
+	if (rv != AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_GET_HANDLE_FAILED);
+		return FAIL_TO_SW;
+		}
+
+	/*To the card with the mod exp*/
+	rv = p_AEP_ModExpCrt(hConnection,(void*)a, (void*)p, (void*)q, (void*)dmp1,(void*)dmq1,
+		(void*)iqmp,(void*)r,NULL);
+	if (rv != AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_MOD_EXP_CRT_FAILED);
+		rv = aep_close_connection(hConnection);
+		return FAIL_TO_SW;
+		}
+
+	/*Return the connection to the pool*/
+	rv = aep_return_connection(hConnection);
+	if (rv != AEP_R_OK)
+		{
+		AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_RETURN_CONNECTION_FAILED); 
+		goto err;
+		}
+ 
+ err:
+	return rv;
+	}
+#endif
+	
+
+#ifdef AEPRAND
+static int aep_rand(unsigned char *buf,int len )
+	{
+	AEP_RV rv = AEP_R_OK;
+	AEP_CONNECTION_HNDL hConnection;
+
+	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+
+	/*Can the request be serviced with what's already in the buffer?*/
+	if (len <= rand_block_bytes)
+		{
+		memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
+		rand_block_bytes -= len;
+		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+		}
+	else
+		/*If not the get another block of random bytes*/
+		{
+		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+
+		rv = aep_get_connection(&hConnection);
+		if (rv !=  AEP_R_OK)
+			{ 
+			AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_HANDLE_FAILED);             
+			goto err_nounlock;
+			}
+
+		if (len > RAND_BLK_SIZE)
+			{
+			rv = p_AEP_GenRandom(hConnection, len, 2, buf, NULL);
+			if (rv !=  AEP_R_OK)
+				{  
+				AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_RANDOM_FAILED); 
+				goto err_nounlock;
+				}
+			}
+		else
+			{
+			CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+
+			rv = p_AEP_GenRandom(hConnection, RAND_BLK_SIZE, 2, &rand_block[0], NULL);
+			if (rv !=  AEP_R_OK)
+				{       
+				AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_RANDOM_FAILED); 
+	      
+				goto err;
+				}
+
+			rand_block_bytes = RAND_BLK_SIZE;
+
+			memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
+			rand_block_bytes -= len;
+
+			CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+			}
+
+		rv = aep_return_connection(hConnection);
+		if (rv != AEP_R_OK)
+			{
+			AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_RETURN_CONNECTION_FAILED); 
+	  
+			goto err_nounlock;
+			}
+		}
+  
+	return 1;
+ err:
+	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ err_nounlock:
+	return 0;
+	}
+	
+static int aep_rand_status(void)
+{
+	return 1;
+}
+#endif
+
+#ifndef OPENSSL_NO_RSA
+static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
+	{
+	int to_return = 0;
+	AEP_RV rv = AEP_R_OK;
+
+	if (!aep_dso)
+		{
+		AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP,AEPHK_R_NOT_LOADED);
+		goto err;
+		}
+
+	/*See if we have all the necessary bits for a crt*/
+	if (rsa->q && rsa->dmp1 && rsa->dmq1 && rsa->iqmp)
+		{
+		rv =  aep_mod_exp_crt(r0,I,rsa->p,rsa->q, rsa->dmp1,rsa->dmq1,rsa->iqmp,ctx);
+
+		if (rv == FAIL_TO_SW){
+			const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
+			to_return = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
+			goto err;
+		}
+		else if (rv != AEP_R_OK)
+			goto err;
+		}
+	else
+		{
+		if (!rsa->d || !rsa->n)
+			{
+			AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP,AEPHK_R_MISSING_KEY_COMPONENTS);
+			goto err;
+			}
+ 
+		rv = aep_mod_exp(r0,I,rsa->d,rsa->n,ctx);
+		if  (rv != AEP_R_OK)
+			goto err;
+	
+		}
+
+	to_return = 1;
+
+ err:
+	return to_return;
+}
+#endif
+
+#ifndef OPENSSL_NO_DSA
+static int aep_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 (!aep_mod_exp(rr,a1,p1,m,ctx)) goto end;
+	/* let t = a2 ^ p2 mod m */
+	if (!aep_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 aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
+	const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
+	BN_MONT_CTX *m_ctx)
+	{  
+	return aep_mod_exp(r, a, p, m, ctx); 
+	}
+#endif
+
+#ifndef OPENSSL_NO_RSA
+/* This function is aliased to mod_exp (with the mont stuff dropped). */
+static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+	const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
+	{
+	return aep_mod_exp(r, a, p, m, ctx);
+	}
+#endif
+
+#ifndef OPENSSL_NO_DH
+/* This function is aliased to mod_exp (with the dh and mont dropped). */
+static int aep_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 aep_mod_exp(r, a, p, m, ctx);
+	}
+#endif
+
+static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR phConnection)
+	{
+	int count;
+	AEP_RV rv = AEP_R_OK;
+
+	/*Get the current process id*/
+	pid_t curr_pid;
+
+	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+
+#ifndef NETWARE_CLIB
+	curr_pid = getpid();
+#else
+	curr_pid = GetThreadID();
+#endif
+
+	/*Check if this is the first time this is being called from the current
+	  process*/
+	if (recorded_pid != curr_pid)
+		{
+		/*Remember our pid so we can check if we're in a new process*/
+		recorded_pid = curr_pid;
+
+		/*Call Finalize to make sure we have not inherited some data
+		  from a parent process*/
+		p_AEP_Finalize();
+     
+		/*Initialise the AEP API*/
+		rv = p_AEP_Initialize(NULL);
+
+		if (rv != AEP_R_OK)
+			{
+			AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_INIT_FAILURE);
+			recorded_pid = 0;
+			goto end;
+			}
+
+		/*Set the AEP big num call back functions*/
+		rv = p_AEP_SetBNCallBacks(&GetBigNumSize, &MakeAEPBigNum,
+			&ConvertAEPBigNum);
+
+		if (rv != AEP_R_OK)
+			{
+			AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_SETBNCALLBACK_FAILURE);
+			recorded_pid = 0;
+			goto end;
+			}
+
+#ifdef AEPRAND
+		/*Reset the rand byte count*/
+		rand_block_bytes = 0;
+#endif
+
+		/*Init the structures*/
+		for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
+			{
+			aep_app_conn_table[count].conn_state = NotConnected;
+			aep_app_conn_table[count].conn_hndl  = 0;
+			}
+
+		/*Open a connection*/
+		rv = p_AEP_OpenConnection(phConnection);
+
+		if (rv != AEP_R_OK)
+			{
+			AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_UNIT_FAILURE);
+			recorded_pid = 0;
+			goto end;
+			}
+
+		aep_app_conn_table[0].conn_state = InUse;
+		aep_app_conn_table[0].conn_hndl = *phConnection;
+		goto end;
+		}
+	/*Check the existing connections to see if we can find a free one*/
+	for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
+		{
+		if (aep_app_conn_table[count].conn_state == Connected)
+			{
+			aep_app_conn_table[count].conn_state = InUse;
+			*phConnection = aep_app_conn_table[count].conn_hndl;
+			goto end;
+			}
+		}
+	/*If no connections available, we're going to have to try
+	  to open a new one*/
+	for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
+		{
+		if (aep_app_conn_table[count].conn_state == NotConnected)
+			{
+			/*Open a connection*/
+			rv = p_AEP_OpenConnection(phConnection);
+
+			if (rv != AEP_R_OK)
+				{	      
+				AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_UNIT_FAILURE);
+				goto end;
+				}
+
+			aep_app_conn_table[count].conn_state = InUse;
+			aep_app_conn_table[count].conn_hndl = *phConnection;
+			goto end;
+			}
+		}
+	rv = AEP_R_GENERAL_ERROR;
+ end:
+	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+	return rv;
+	}
+
+
+static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection)
+	{
+	int count;
+
+	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+
+	/*Find the connection item that matches this connection handle*/
+	for(count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
+		{
+		if (aep_app_conn_table[count].conn_hndl == hConnection)
+			{
+			aep_app_conn_table[count].conn_state = Connected;
+			break;
+			}
+		}
+
+	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+
+	return AEP_R_OK;
+	}
+
+static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection)
+	{
+	int count;
+	AEP_RV rv = AEP_R_OK;
+
+	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+
+	/*Find the connection item that matches this connection handle*/
+	for(count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
+		{
+		if (aep_app_conn_table[count].conn_hndl == hConnection)
+			{
+			rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
+			if (rv != AEP_R_OK)
+				goto end;
+			aep_app_conn_table[count].conn_state = NotConnected;
+			aep_app_conn_table[count].conn_hndl  = 0;
+			break;
+			}
+		}
+
+ end:
+	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+	return rv;
+	}
+
+static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use)
+	{
+	int count;
+	AEP_RV rv = AEP_R_OK;
+
+	*in_use = 0;
+	if (use_engine_lock) CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+	for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
+		{
+		switch (aep_app_conn_table[count].conn_state)
+			{
+		case Connected:
+			rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
+			if (rv != AEP_R_OK)
+				goto end;
+			aep_app_conn_table[count].conn_state = NotConnected;
+			aep_app_conn_table[count].conn_hndl  = 0;
+			break;
+		case InUse:
+			(*in_use)++;
+			break;
+		case NotConnected:
+			break;
+			}
+		}
+ end:
+	if (use_engine_lock) CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+	return rv;
+	}
+
+/*BigNum call back functions, used to convert OpenSSL bignums into AEP bignums.
+  Note only 32bit Openssl build support*/
+
+static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize)
+	{
+	BIGNUM* bn;
+
+	/*Cast the ArbBigNum pointer to our BIGNUM struct*/
+	bn = (BIGNUM*) ArbBigNum;
+
+#ifdef SIXTY_FOUR_BIT_LONG
+	*BigNumSize = bn->top << 3;
+#else
+	/*Size of the bignum in bytes is equal to the bn->top (no of 32 bit
+	  words) multiplies by 4*/
+	*BigNumSize = bn->top << 2;
+#endif
+
+	return AEP_R_OK;
+	}
+
+static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
+	unsigned char* AEP_BigNum)
+	{
+	BIGNUM* bn;
+
+#ifndef SIXTY_FOUR_BIT_LONG
+	unsigned char* buf;
+	int i;
+#endif
+
+	/*Cast the ArbBigNum pointer to our BIGNUM struct*/
+	bn = (BIGNUM*) ArbBigNum;
+
+#ifdef SIXTY_FOUR_BIT_LONG
+  	memcpy(AEP_BigNum, bn->d, BigNumSize);
+#else
+	/*Must copy data into a (monotone) least significant byte first format
+	  performing endian conversion if necessary*/
+	for(i=0;i<bn->top;i++)
+		{
+		buf = (unsigned char*)&bn->d[i];
+
+		*((AEP_U32*)AEP_BigNum) = (AEP_U32)
+			((unsigned) buf[1] << 8 | buf[0]) |
+			((unsigned) buf[3] << 8 | buf[2])  << 16;
+
+		AEP_BigNum += 4;
+		}
+#endif
+
+	return AEP_R_OK;
+	}
+
+/*Turn an AEP Big Num back to a user big num*/
+static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
+	unsigned char* AEP_BigNum)
+	{
+	BIGNUM* bn;
+#ifndef SIXTY_FOUR_BIT_LONG
+	int i;
+#endif
+
+	bn = (BIGNUM*)ArbBigNum;
+
+	/*Expand the result bn so that it can hold our big num.
+	  Size is in bits*/
+	bn_expand(bn, (int)(BigNumSize << 3));
+
+#ifdef SIXTY_FOUR_BIT_LONG
+	bn->top = BigNumSize >> 3;
+	
+	if((BigNumSize & 7) != 0)
+		bn->top++;
+
+	memset(bn->d, 0, bn->top << 3);	
+
+	memcpy(bn->d, AEP_BigNum, BigNumSize);
+#else
+	bn->top = BigNumSize >> 2;
+ 
+	for(i=0;i<bn->top;i++)
+		{
+		bn->d[i] = (AEP_U32)
+			((unsigned) AEP_BigNum[3] << 8 | AEP_BigNum[2]) << 16 |
+			((unsigned) AEP_BigNum[1] << 8 | AEP_BigNum[0]);
+		AEP_BigNum += 4;
+		}
+#endif
+
+	return AEP_R_OK;
+}	
+	
+#endif /* !OPENSSL_NO_HW_AEP */
+#endif /* !OPENSSL_NO_HW */