/* dso_dl.c *//* Written by Richard Levitte (richard@levitte.org) 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). * */#include <stdio.h>#include "cryptlib.h"#include <openssl/dso.h>#ifndef DSO_DLDSO_METHOD *DSO_METHOD_dl(void)       {       return NULL;       }#else#include <dl.h>/* Part of the hack in "dl_load" ... */#define DSO_MAX_TRANSLATED_SIZE 256static int dl_load(DSO *dso);static int dl_unload(DSO *dso);static void *dl_bind_var(DSO *dso, const char *symname);static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);#if 0static int dl_unbind_var(DSO *dso, char *symname, void *symptr);static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);static int dl_init(DSO *dso);static int dl_finish(DSO *dso);static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);#endifstatic char *dl_name_converter(DSO *dso, const char *filename);static DSO_METHOD dso_meth_dl = {	"OpenSSL 'dl' shared library method",	dl_load,	dl_unload,	dl_bind_var,	dl_bind_func,/* For now, "unbind" doesn't exist */#if 0	NULL, /* unbind_var */	NULL, /* unbind_func */#endif	NULL, /* ctrl */	dl_name_converter,	NULL, /* init */	NULL  /* finish */	};DSO_METHOD *DSO_METHOD_dl(void)	{	return(&dso_meth_dl);	}/* For this DSO_METHOD, our meth_data STACK will contain; * (i) the handle (shl_t) returned from shl_load(). * NB: I checked on HPUX11 and shl_t is itself a pointer * type so the cast is safe. */static int dl_load(DSO *dso)	{	shl_t ptr = NULL;	/* We don't do any fancy retries or anything, just take the method's	 * (or DSO's if it has the callback set) best translation of the	 * platform-independant filename and try once with that. */	char *filename= DSO_convert_filename(dso, NULL);	if(filename == NULL)		{		DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);		goto err;		}	ptr = shl_load(filename, BIND_IMMEDIATE |		(dso->flags&DSO_FLAG_NO_NAME_TRANSLATION?0:DYNAMIC_PATH), 0L);	if(ptr == NULL)		{		DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);		ERR_add_error_data(4, "filename(", filename, "): ",			strerror(errno));		goto err;		}	if(!sk_push(dso->meth_data, (char *)ptr))		{		DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);		goto err;		}	/* Success, stick the converted filename we've loaded under into the DSO	 * (it also serves as the indicator that we are currently loaded). */	dso->loaded_filename = filename;	return(1);err:	/* Cleanup! */	if(filename != NULL)		OPENSSL_free(filename);	if(ptr != NULL)		shl_unload(ptr);	return(0);	}static int dl_unload(DSO *dso)	{	shl_t ptr;	if(dso == NULL)		{		DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);		return(0);		}	if(sk_num(dso->meth_data) < 1)		return(1);	/* Is this statement legal? */	ptr = (shl_t)sk_pop(dso->meth_data);	if(ptr == NULL)		{		DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);		/* Should push the value back onto the stack in		 * case of a retry. */		sk_push(dso->meth_data, (char *)ptr);		return(0);		}	shl_unload(ptr);	return(1);	}static void *dl_bind_var(DSO *dso, const char *symname)	{	shl_t ptr;	void *sym;	if((dso == NULL) || (symname == NULL))		{		DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);		return(NULL);		}	if(sk_num(dso->meth_data) < 1)		{		DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);		return(NULL);		}	ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);	if(ptr == NULL)		{		DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);		return(NULL);		}	if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)		{		DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);		ERR_add_error_data(4, "symname(", symname, "): ",			strerror(errno));		return(NULL);		}	return(sym);	}static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)	{	shl_t ptr;	void *sym;	if((dso == NULL) || (symname == NULL))		{		DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);		return(NULL);		}	if(sk_num(dso->meth_data) < 1)		{		DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);		return(NULL);		}	ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);	if(ptr == NULL)		{		DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);		return(NULL);		}	if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)		{		DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);		ERR_add_error_data(4, "symname(", symname, "): ",			strerror(errno));		return(NULL);		}	return((DSO_FUNC_TYPE)sym);	}/* This function is identical to the one in dso_dlfcn.c, but as it is highly * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at the * same time, there's no great duplicating the code. Figuring out an elegant  * way to share one copy of the code would be more difficult and would not * leave the implementations independant. */#if defined(__hpux)static const char extension[] = ".sl";#elsestatic const char extension[] = ".so";#endifstatic char *dl_name_converter(DSO *dso, const char *filename)	{	char *translated;	int len, rsize, transform;	len = strlen(filename);	rsize = len + 1;	transform = (strstr(filename, "/") == NULL);		{		/* We will convert this to "%s.s?" or "lib%s.s?" */		rsize += strlen(extension);/* The length of ".s?" */		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)			rsize += 3; /* The length of "lib" */		}	translated = OPENSSL_malloc(rsize);	if(translated == NULL)		{		DSOerr(DSO_F_DL_NAME_CONVERTER,				DSO_R_NAME_TRANSLATION_FAILED); 		return(NULL);   		}	if(transform)		{		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)			sprintf(translated, "lib%s%s", filename, extension);		else			sprintf(translated, "%s%s", filename, extension);		}	else		sprintf(translated, "%s", filename);	return(translated);	}#ifdef OPENSSL_FIPSstatic void dl_ref_point(){}int DSO_pathbyaddr(void *addr,char *path,int sz)	{	struct shl_descriptor inf;	int i,len;	if (addr == NULL)		{		union { void(*f)(); void *p; } t = { dl_ref_point };		addr = t.p;		}	for (i=-1;shl_get_r(i,&inf)==0;i++)		{		if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||		    ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend))			{			len = (int)strlen(inf.filename);			if (sz <= 0) return len+1;			if (len >= sz) len=sz-1;			memcpy(path,inf.filename,len);			path[len++] = 0;			return len;			}		}	return -1;	}#endif#endif /* DSO_DL */