/* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */

 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL

  * project 2000.

  */

 /* ====================================================================

  * Copyright (c) 2000 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).

  *

  */

  /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include <stdio.h>

 #include <openssl/crypto.h>

 #include "cryptlib.h"

 #include <openssl/dso.h>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 #ifndef EMULATOR

 static DSO_METHOD *default_DSO_meth = NULL;

 #else

 GET_STATIC_VAR_FROM_TLS(default_DSO_meth,dso_lib,DSO_METHOD *)

 #define default_DSO_meth (*GET_WSD_VAR_NAME(default_DSO_meth,dso_lib, s)())

 #endif

 EXPORT_C DSO *DSO_new(void)

 	{

 	return(DSO_new_method(NULL));

 	}

 EXPORT_C void DSO_set_default_method(DSO_METHOD *meth)

 	{

 	default_DSO_meth = meth;

 	}

 EXPORT_C DSO_METHOD *DSO_get_default_method(void)

 	{

 	return(default_DSO_meth);

 	}

 EXPORT_C DSO_METHOD *DSO_get_method(DSO *dso)

 	{

 	return(dso->meth);

 	}

 EXPORT_C DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)

 	{

 	DSO_METHOD *mtmp;

 	mtmp = dso->meth;

 	dso->meth = meth;

 	return(mtmp);

 	}

 EXPORT_C DSO *DSO_new_method(DSO_METHOD *meth)

 	{

 	DSO *ret;

 	if(default_DSO_meth == NULL)

 		/* We default to DSO_METH_openssl() which in turn defaults

 		 * to stealing the "best available" method. Will fallback

 		 * to DSO_METH_null() in the worst case. */

 		default_DSO_meth = DSO_METHOD_openssl();

 	ret = (DSO *)OPENSSL_malloc(sizeof(DSO));

 	if(ret == NULL)

 		{

 		DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);

 		return(NULL);

 		}

 	memset(ret, 0, sizeof(DSO));

 	ret->meth_data = sk_new_null();

 	if(ret->meth_data == NULL)

 		{

 		/* sk_new doesn't generate any errors so we do */

 		DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);

 		OPENSSL_free(ret);

 		return(NULL);

 		}

 	if(meth == NULL)

 		ret->meth = default_DSO_meth;

 	else

 		ret->meth = meth;

 	ret->references = 1;

 	if((ret->meth->init != NULL) && !ret->meth->init(ret))

 		{

 		OPENSSL_free(ret);

 		ret=NULL;

 		}

 	return(ret);

 	}

 EXPORT_C int DSO_free(DSO *dso)

 	{

         int i;

 	if(dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);

 		return(0);

 		}

 	i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);

 #ifdef REF_PRINT

 	REF_PRINT("DSO",dso);

 #endif

 	if(i > 0) return(1);

 #ifdef REF_CHECK

 	if(i < 0)

 		{

 		fprintf(stderr,"DSO_free, bad reference count\n");

 		abort();

 		}

 #endif

 	if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))

 		{

 		DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);

 		return(0);

 		}

 	if((dso->meth->finish != NULL) && !dso->meth->finish(dso))

 		{

 		DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);

 		return(0);

 		}

 	sk_free(dso->meth_data);

 	if(dso->filename != NULL)

 		OPENSSL_free(dso->filename);

 	if(dso->loaded_filename != NULL)

 		OPENSSL_free(dso->loaded_filename);

 	OPENSSL_free(dso);

 	return(1);

 	}

 EXPORT_C int DSO_flags(DSO *dso)

 	{

 	return((dso == NULL) ? 0 : dso->flags);

 	}

 EXPORT_C int DSO_up_ref(DSO *dso)

 	{

 	if (dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_UP_REF,ERR_R_PASSED_NULL_PARAMETER);

 		return(0);

 		}

 	CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);

 	return(1);

 	}

 EXPORT_C DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)

 	{

 	DSO *ret;

 	int allocated = 0;

 	if(dso == NULL)

 		{

 		ret = DSO_new_method(meth);

 		if(ret == NULL)

 			{

 			DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);

 			goto err;

 			}

 		allocated = 1;

 		/* Pass the provided flags to the new DSO object */

 		if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)

 			{

 			DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);

 			goto err;

 			}

 		}

 	else

 		ret = dso;

 	/* Don't load if we're currently already loaded */

 	if(ret->filename != NULL)

 		{

 		DSOerr(DSO_F_DSO_LOAD,DSO_R_DSO_ALREADY_LOADED);

 		goto err;

 		}

 	/* filename can only be NULL if we were passed a dso that already has

 	 * one set. */

 	if(filename != NULL)

 		if(!DSO_set_filename(ret, filename))

 			{

 			DSOerr(DSO_F_DSO_LOAD,DSO_R_SET_FILENAME_FAILED);

 			goto err;

 			}

 	filename = ret->filename;

 	if(filename == NULL)

 		{

 		DSOerr(DSO_F_DSO_LOAD,DSO_R_NO_FILENAME);

 		goto err;

 		}

 	if(ret->meth->dso_load == NULL)

 		{

 		DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);

 		goto err;

 		}

 	if(!ret->meth->dso_load(ret))

 		{

 		DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);

 		goto err;

 		}

 	/* Load succeeded */

 	return(ret);

 err:

 	if(allocated)

 		DSO_free(ret);

 	return(NULL);

 	}

 EXPORT_C void *DSO_bind_var(DSO *dso, const char *symname)

 	{

 	void *ret = NULL;

 	if((dso == NULL) || (symname == NULL))

 		{

 		DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);

 		return(NULL);

 		}

 	if(dso->meth->dso_bind_var == NULL)

 		{

 		DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);

 		return(NULL);

 		}

 	if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)

 		{

 		DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE);

 		return(NULL);

 		}

 	/* Success */

 	return(ret);

 	}

 EXPORT_C DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)

 	{

 	DSO_FUNC_TYPE ret = NULL;

 	if((dso == NULL) || (symname == NULL))

 		{

 		DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);

 		return(NULL);

 		}

 	if(dso->meth->dso_bind_func == NULL)

 		{

 		DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);

 		return(NULL);

 		}

 	if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)

 		{

 		DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE);

 		return(NULL);

 		}

 	/* Success */

 	return(ret);

 	}

 /* I don't really like these *_ctrl functions very much to be perfectly

  * honest. For one thing, I think I have to return a negative value for

  * any error because possible DSO_ctrl() commands may return values

  * such as "size"s that can legitimately be zero (making the standard

  * "if(DSO_cmd(...))" form that works almost everywhere else fail at

  * odd times. I'd prefer "output" values to be passed by reference and

  * the return value as success/failure like usual ... but we conform

  * when we must... :-) */

 EXPORT_C long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)

 	{

 	if(dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);

 		return(-1);

 		}

 	/* We should intercept certain generic commands and only pass control

 	 * to the method-specific ctrl() function if it's something we don't

 	 * handle. */

 	switch(cmd)

 		{

 	case DSO_CTRL_GET_FLAGS:

 		return dso->flags;

 	case DSO_CTRL_SET_FLAGS:

 		dso->flags = (int)larg;

 		return(0);

 	case DSO_CTRL_OR_FLAGS:

 		dso->flags |= (int)larg;

 		return(0);

 	default:

 		break;

 		}

 	if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL))

 		{

 		DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);

 		return(-1);

 		}

 	return(dso->meth->dso_ctrl(dso,cmd,larg,parg));

 	}

 EXPORT_C int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,

 			DSO_NAME_CONVERTER_FUNC *oldcb)

 	{

 	if(dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_SET_NAME_CONVERTER,

 				ERR_R_PASSED_NULL_PARAMETER);

 		return(0);

 		}

 	if(oldcb)

 		*oldcb = dso->name_converter;

 	dso->name_converter = cb;

 	return(1);

 	}

 EXPORT_C const char *DSO_get_filename(DSO *dso)

 	{

 	if(dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_GET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);

 		return(NULL);

 		}

 	return(dso->filename);

 	}

 EXPORT_C int DSO_set_filename(DSO *dso, const char *filename)

 	{

 	char *copied;

 	if((dso == NULL) || (filename == NULL))

 		{

 		DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);

 		return(0);

 		}

 	if(dso->loaded_filename)

 		{

 		DSOerr(DSO_F_DSO_SET_FILENAME,DSO_R_DSO_ALREADY_LOADED);

 		return(0);

 		}

 	/* We'll duplicate filename */

 	copied = OPENSSL_malloc(strlen(filename) + 1);

 	if(copied == NULL)

 		{

 		DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_MALLOC_FAILURE);

 		return(0);

 		}

 	BUF_strlcpy(copied, filename, strlen(filename) + 1);

 	if(dso->filename)

 		OPENSSL_free(dso->filename);

 	dso->filename = copied;

 	return(1);

 	}

 EXPORT_C char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)

 	{

 	char *result = NULL;

 	if(dso == NULL || filespec1 == NULL)

 		{

 		DSOerr(DSO_F_DSO_MERGE,ERR_R_PASSED_NULL_PARAMETER);

 		return(NULL);

 		}

 	if(filespec1 == NULL)

 		filespec1 = dso->filename;

 	if(filespec1 == NULL)

 		{

 		DSOerr(DSO_F_DSO_MERGE,DSO_R_NO_FILE_SPECIFICATION);

 		return(NULL);

 		}

 	if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0)

 		{

 		if(dso->merger != NULL)

 			result = dso->merger(dso, filespec1, filespec2);

 		else if(dso->meth->dso_merger != NULL)

 			result = dso->meth->dso_merger(dso,

 				filespec1, filespec2);

 		}

 	return(result);

 	}

 EXPORT_C char *DSO_convert_filename(DSO *dso, const char *filename)

 	{

 	char *result = NULL;

 	if(dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_CONVERT_FILENAME,ERR_R_PASSED_NULL_PARAMETER);

 		return(NULL);

 		}

 	if(filename == NULL)

 		filename = dso->filename;

 	if(filename == NULL)

 		{

 		DSOerr(DSO_F_DSO_CONVERT_FILENAME,DSO_R_NO_FILENAME);

 		return(NULL);

 		}

 	if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0)

 		{

 		if(dso->name_converter != NULL)

 			result = dso->name_converter(dso, filename);

 		else if(dso->meth->dso_name_converter != NULL)

 			result = dso->meth->dso_name_converter(dso, filename);

 		}

 	if(result == NULL)

 		{

 		result = OPENSSL_malloc(strlen(filename) + 1);

 		if(result == NULL)

 			{

 			DSOerr(DSO_F_DSO_CONVERT_FILENAME,

 					ERR_R_MALLOC_FAILURE);

 			return(NULL);

 			}

 		BUF_strlcpy(result, filename, strlen(filename) + 1);

 		}

 	return(result);

 	}

 EXPORT_C const char *DSO_get_loaded_filename(DSO *dso)

 	{

 	if(dso == NULL)

 		{

 		DSOerr(DSO_F_DSO_GET_LOADED_FILENAME,

 				ERR_R_PASSED_NULL_PARAMETER);

 		return(NULL);

 		}

 	return(dso->loaded_filename);

 	}