sl@0: /* dso_dlfcn.c -*- mode:C; c-file-style: "eay" -*- */
sl@0: /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
sl@0:  * project 2000.
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    licensing@OpenSSL.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0:  /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0: 
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/dso.h>
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libcrypto_wsd_macros.h"
sl@0: #include "libcrypto_wsd.h"
sl@0: #endif
sl@0: 
sl@0: #ifndef DSO_DLFCN
sl@0: DSO_METHOD *DSO_METHOD_dlfcn(void)
sl@0: 	{
sl@0: 	return NULL;
sl@0: 	}
sl@0: 	
sl@0: #else
sl@0: 
sl@0: #ifdef HAVE_DLFCN_H
sl@0: #include <dlfcn.h>
sl@0: #endif
sl@0: 
sl@0: /* Part of the hack in "dlfcn_load" ... */
sl@0: #define DSO_MAX_TRANSLATED_SIZE 256
sl@0: 
sl@0: static int dlfcn_load(DSO *dso);
sl@0: static int dlfcn_unload(DSO *dso);
sl@0: static void *dlfcn_bind_var(DSO *dso, const char *symname);
sl@0: static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
sl@0: #if 0
sl@0: static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
sl@0: static int dlfcn_init(DSO *dso);
sl@0: static int dlfcn_finish(DSO *dso);
sl@0: static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
sl@0: #endif
sl@0: static char *dlfcn_name_converter(DSO *dso, const char *filename);
sl@0: static char *dlfcn_merger(DSO *dso, const char *filespec1,
sl@0: 	const char *filespec2);
sl@0: 
sl@0: #ifndef EMULATOR
sl@0: static DSO_METHOD dso_meth_dlfcn = {
sl@0: 	"OpenSSL 'dlfcn' shared library method",
sl@0: 	dlfcn_load,
sl@0: 	dlfcn_unload,
sl@0: 	dlfcn_bind_var,
sl@0: 	dlfcn_bind_func,
sl@0: /* For now, "unbind" doesn't exist */
sl@0: #if 0
sl@0: 	NULL, /* unbind_var */
sl@0: 	NULL, /* unbind_func */
sl@0: #endif
sl@0: 	NULL, /* ctrl */
sl@0: 	dlfcn_name_converter,
sl@0: 	dlfcn_merger,
sl@0: 	NULL, /* init */
sl@0: 	NULL  /* finish */
sl@0: 	};
sl@0: #else
sl@0: GET_STATIC_VAR_FROM_TLS(dso_meth_dlfcn,dso_dlfcn,DSO_METHOD)
sl@0: #define dso_meth_dlfcn (*GET_WSD_VAR_NAME(dso_meth_dlfcn,dso_dlfcn, s)())
sl@0: const DSO_METHOD temp_s_dso_meth_dlfcn = {
sl@0: 	"OpenSSL 'dlfcn' shared library method",
sl@0: 	dlfcn_load,
sl@0: 	dlfcn_unload,
sl@0: 	dlfcn_bind_var,
sl@0: 	dlfcn_bind_func,
sl@0: /* For now, "unbind" doesn't exist */
sl@0: #if 0
sl@0: 	NULL, /* unbind_var */
sl@0: 	NULL, /* unbind_func */
sl@0: #endif
sl@0: 	NULL, /* ctrl */
sl@0: 	dlfcn_name_converter,
sl@0: 	dlfcn_merger,
sl@0: 	NULL, /* init */
sl@0: 	NULL  /* finish */
sl@0: 	};
sl@0: 
sl@0: #endif
sl@0: EXPORT_C DSO_METHOD *DSO_METHOD_dlfcn(void)
sl@0: 	{
sl@0: 	return(&dso_meth_dlfcn);
sl@0: 	}
sl@0: 
sl@0: /* Prior to using the dlopen() function, we should decide on the flag
sl@0:  * we send. There's a few different ways of doing this and it's a
sl@0:  * messy venn-diagram to match up which platforms support what. So
sl@0:  * as we don't have autoconf yet, I'm implementing a hack that could
sl@0:  * be hacked further relatively easily to deal with cases as we find
sl@0:  * them. Initially this is to cope with OpenBSD. */
sl@0: #if defined(__OpenBSD__) || defined(__NetBSD__)
sl@0: #	ifdef DL_LAZY
sl@0: #		define DLOPEN_FLAG DL_LAZY
sl@0: #	else
sl@0: #		ifdef RTLD_NOW
sl@0: #			define DLOPEN_FLAG RTLD_NOW
sl@0: #		else
sl@0: #			define DLOPEN_FLAG 0
sl@0: #		endif
sl@0: #	endif
sl@0: #else
sl@0: #	ifdef OPENSSL_SYS_SUNOS
sl@0: #		define DLOPEN_FLAG 1
sl@0: #	else
sl@0: #		define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
sl@0: #	endif
sl@0: #endif
sl@0: 
sl@0: /* For this DSO_METHOD, our meth_data STACK will contain;
sl@0:  * (i) the handle (void*) returned from dlopen().
sl@0:  */
sl@0: 
sl@0: static int dlfcn_load(DSO *dso)
sl@0: 	{
sl@0: 	void *ptr = NULL;
sl@0: 	/* See applicable comments in dso_dl.c */
sl@0: 	char *filename = DSO_convert_filename(dso, NULL);
sl@0: 	int flags = DLOPEN_FLAG;
sl@0: 
sl@0: 	if(filename == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_LOAD,DSO_R_NO_FILENAME);
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: #ifdef RTLD_GLOBAL
sl@0: 	if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
sl@0: 		flags |= RTLD_GLOBAL;
sl@0: #endif
sl@0: 	ptr = dlopen(filename, flags);
sl@0: 	if(ptr == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
sl@0: 		ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
sl@0: 		goto err;
sl@0: 		}
sl@0: 	if(!sk_push(dso->meth_data, (char *)ptr))
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
sl@0: 		goto err;
sl@0: 		}
sl@0: 	/* Success */
sl@0: 	dso->loaded_filename = filename;
sl@0: 	return(1);
sl@0: err:
sl@0: 	/* Cleanup! */
sl@0: 	if(filename != NULL)
sl@0: 		OPENSSL_free(filename);
sl@0: 	if(ptr != NULL)
sl@0: 		dlclose(ptr);
sl@0: 	return(0);
sl@0: }
sl@0: 
sl@0: static int dlfcn_unload(DSO *dso)
sl@0: 	{
sl@0: 	void *ptr;
sl@0: 	if(dso == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
sl@0: 		return(0);
sl@0: 		}
sl@0: 	if(sk_num(dso->meth_data) < 1)
sl@0: 		return(1);
sl@0: 	ptr = (void *)sk_pop(dso->meth_data);
sl@0: 	if(ptr == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_NULL_HANDLE);
sl@0: 		/* Should push the value back onto the stack in
sl@0: 		 * case of a retry. */
sl@0: 		sk_push(dso->meth_data, (char *)ptr);
sl@0: 		return(0);
sl@0: 		}
sl@0: 	/* For now I'm not aware of any errors associated with dlclose() */
sl@0: 	dlclose(ptr);
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: static void *dlfcn_bind_var(DSO *dso, const char *symname)
sl@0: 	{
sl@0: 	void *ptr, *sym;
sl@0: 
sl@0: 	if((dso == NULL) || (symname == NULL))
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	if(sk_num(dso->meth_data) < 1)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
sl@0: 	if(ptr == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	sym = dlsym(ptr, symname);
sl@0: 	if(sym == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
sl@0: 		ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	return(sym);
sl@0: 	}
sl@0: 
sl@0: static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
sl@0: 	{
sl@0: 	void *ptr;
sl@0: 	DSO_FUNC_TYPE sym, *tsym = &sym;
sl@0: 
sl@0: 	if((dso == NULL) || (symname == NULL))
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	if(sk_num(dso->meth_data) < 1)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
sl@0: 	if(ptr == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	*(void **)(tsym) = dlsym(ptr, symname);
sl@0: 	if(sym == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
sl@0: 		ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	return(sym);
sl@0: 	}
sl@0: 
sl@0: static char *dlfcn_merger(DSO *dso, const char *filespec1,
sl@0: 	const char *filespec2)
sl@0: 	{
sl@0: 	char *merged;
sl@0: 
sl@0: 	if(!filespec1 && !filespec2)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_MERGER,
sl@0: 				ERR_R_PASSED_NULL_PARAMETER);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	/* If the first file specification is a rooted path, it rules.
sl@0: 	   same goes if the second file specification is missing. */
sl@0: 	if (!filespec2 || filespec1[0] == '/')
sl@0: 		{
sl@0: 		merged = OPENSSL_malloc(strlen(filespec1) + 1);
sl@0: 		if(!merged)
sl@0: 			{
sl@0: 			DSOerr(DSO_F_DLFCN_MERGER,
sl@0: 				ERR_R_MALLOC_FAILURE);
sl@0: 			return(NULL);
sl@0: 			}
sl@0: 		strcpy(merged, filespec1);
sl@0: 		}
sl@0: 	/* If the first file specification is missing, the second one rules. */
sl@0: 	else if (!filespec1)
sl@0: 		{
sl@0: 		merged = OPENSSL_malloc(strlen(filespec2) + 1);
sl@0: 		if(!merged)
sl@0: 			{
sl@0: 			DSOerr(DSO_F_DLFCN_MERGER,
sl@0: 				ERR_R_MALLOC_FAILURE);
sl@0: 			return(NULL);
sl@0: 			}
sl@0: 		strcpy(merged, filespec2);
sl@0: 		}
sl@0: 	else
sl@0: 		/* This part isn't as trivial as it looks.  It assumes that
sl@0: 		   the second file specification really is a directory, and
sl@0: 		   makes no checks whatsoever.  Therefore, the result becomes
sl@0: 		   the concatenation of filespec2 followed by a slash followed
sl@0: 		   by filespec1. */
sl@0: 		{
sl@0: 		int spec2len, len;
sl@0: 
sl@0: 		spec2len = (filespec2 ? strlen(filespec2) : 0);
sl@0: 		len = spec2len + (filespec1 ? strlen(filespec1) : 0);
sl@0: 
sl@0: 		if(filespec2 && filespec2[spec2len - 1] == '/')
sl@0: 			{
sl@0: 			spec2len--;
sl@0: 			len--;
sl@0: 			}
sl@0: 		merged = OPENSSL_malloc(len + 2);
sl@0: 		if(!merged)
sl@0: 			{
sl@0: 			DSOerr(DSO_F_DLFCN_MERGER,
sl@0: 				ERR_R_MALLOC_FAILURE);
sl@0: 			return(NULL);
sl@0: 			}
sl@0: 		strcpy(merged, filespec2);
sl@0: 		merged[spec2len] = '/';
sl@0: 		strcpy(&merged[spec2len + 1], filespec1);
sl@0: 		}
sl@0: 	return(merged);
sl@0: 	}
sl@0: 
sl@0: static char *dlfcn_name_converter(DSO *dso, const char *filename)
sl@0: 	{
sl@0: 	char *translated;
sl@0: 	int len, rsize, transform;
sl@0: 
sl@0: 	len = strlen(filename);
sl@0: 	rsize = len + 1;
sl@0: 	transform = (strstr(filename, "/") == NULL);
sl@0: 	if(transform)
sl@0: 		{
sl@0: #ifndef SYMBIAN		
sl@0: 		/* We will convert this to "%s.so" or "lib%s.so" */
sl@0: 		rsize += 3;	/* The length of ".so" */
sl@0: 		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
sl@0: 			rsize += 3; /* The length of "lib" */
sl@0: #else
sl@0: 	/* We will convert this to "%s.dll" or "lib%s.dll" */
sl@0: 		rsize += 4;	/* The length of ".dll" */
sl@0: 		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
sl@0: 			rsize += 3; /* The length of "lib" */
sl@0: #endif			
sl@0: 		}
sl@0: 	translated = OPENSSL_malloc(rsize);
sl@0: 	if(translated == NULL)
sl@0: 		{
sl@0: 		DSOerr(DSO_F_DLFCN_NAME_CONVERTER,
sl@0: 				DSO_R_NAME_TRANSLATION_FAILED);
sl@0: 		return(NULL);
sl@0: 		}
sl@0: 	if(transform)
sl@0: 		{
sl@0: #ifndef SYMBIAN		
sl@0: 		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
sl@0: 			sprintf(translated, "lib%s.so", filename);
sl@0: 		else
sl@0: 			sprintf(translated, "%s.so", filename);
sl@0: #else
sl@0: 		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
sl@0: 			sprintf(translated, "lib%s.dll", filename);
sl@0: 		else
sl@0: 			sprintf(translated, "%s.dll", filename);
sl@0: 
sl@0: #endif		
sl@0: 		
sl@0: 		}
sl@0: 	else
sl@0: 		sprintf(translated, "%s", filename);
sl@0: 	return(translated);
sl@0: 	}
sl@0: 
sl@0: #endif /* DSO_DLFCN */