/* 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);

	}