d9efa3616a
translate library names by only adding ".so" to them without prepending them with "lib". Add the flag DSO_FLAG_NAME_TRANSLATION_EXT_ONLY for that purpose.
286 lines
7.8 KiB
C
286 lines
7.8 KiB
C
/* dso_dlfcn.c */
|
|
/* 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).
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/dso.h>
|
|
|
|
#ifndef DSO_DLFCN
|
|
DSO_METHOD *DSO_METHOD_dlfcn(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
#else
|
|
|
|
#ifdef HAVE_DLFCN_H
|
|
#include <dlfcn.h>
|
|
#endif
|
|
|
|
/* Part of the hack in "dlfcn_load" ... */
|
|
#define DSO_MAX_TRANSLATED_SIZE 256
|
|
|
|
static int dlfcn_load(DSO *dso);
|
|
static int dlfcn_unload(DSO *dso);
|
|
static void *dlfcn_bind_var(DSO *dso, const char *symname);
|
|
static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
|
|
#if 0
|
|
static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
|
|
static int dlfcn_init(DSO *dso);
|
|
static int dlfcn_finish(DSO *dso);
|
|
static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
|
|
#endif
|
|
static char *dlfcn_name_converter(DSO *dso, const char *filename);
|
|
|
|
static DSO_METHOD dso_meth_dlfcn = {
|
|
"OpenSSL 'dlfcn' shared library method",
|
|
dlfcn_load,
|
|
dlfcn_unload,
|
|
dlfcn_bind_var,
|
|
dlfcn_bind_func,
|
|
/* For now, "unbind" doesn't exist */
|
|
#if 0
|
|
NULL, /* unbind_var */
|
|
NULL, /* unbind_func */
|
|
#endif
|
|
NULL, /* ctrl */
|
|
dlfcn_name_converter,
|
|
NULL, /* init */
|
|
NULL /* finish */
|
|
};
|
|
|
|
DSO_METHOD *DSO_METHOD_dlfcn(void)
|
|
{
|
|
return(&dso_meth_dlfcn);
|
|
}
|
|
|
|
/* Prior to using the dlopen() function, we should decide on the flag
|
|
* we send. There's a few different ways of doing this and it's a
|
|
* messy venn-diagram to match up which platforms support what. So
|
|
* as we don't have autoconf yet, I'm implementing a hack that could
|
|
* be hacked further relatively easily to deal with cases as we find
|
|
* them. Initially this is to cope with OpenBSD. */
|
|
#ifdef __OpenBSD__
|
|
# ifdef DL_LAZY
|
|
# define DLOPEN_FLAG DL_LAZY
|
|
# else
|
|
# ifdef RTLD_NOW
|
|
# define DLOPEN_FLAG RTLD_NOW
|
|
# else
|
|
# define DLOPEN_FLAG 0
|
|
# endif
|
|
# endif
|
|
#else
|
|
# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
|
|
#endif
|
|
|
|
/* For this DSO_METHOD, our meth_data STACK will contain;
|
|
* (i) the handle (void*) returned from dlopen().
|
|
*/
|
|
|
|
static int dlfcn_load(DSO *dso)
|
|
{
|
|
void *ptr = NULL;
|
|
/* See applicable comments in dso_dl.c */
|
|
char *filename = DSO_convert_filename(dso, NULL);
|
|
|
|
if(filename == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_LOAD,DSO_R_NO_FILENAME);
|
|
goto err;
|
|
}
|
|
ptr = dlopen(filename, DLOPEN_FLAG);
|
|
if(ptr == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
|
|
goto err;
|
|
}
|
|
if(!sk_push(dso->meth_data, (char *)ptr))
|
|
{
|
|
DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
|
|
goto err;
|
|
}
|
|
/* Success */
|
|
dso->loaded_filename = filename;
|
|
return(1);
|
|
err:
|
|
/* Cleanup! */
|
|
if(filename != NULL)
|
|
OPENSSL_free(filename);
|
|
if(ptr != NULL)
|
|
dlclose(ptr);
|
|
return(0);
|
|
}
|
|
|
|
static int dlfcn_unload(DSO *dso)
|
|
{
|
|
void *ptr;
|
|
if(dso == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
|
|
return(0);
|
|
}
|
|
if(sk_num(dso->meth_data) < 1)
|
|
return(1);
|
|
ptr = (void *)sk_pop(dso->meth_data);
|
|
if(ptr == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_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);
|
|
}
|
|
/* For now I'm not aware of any errors associated with dlclose() */
|
|
dlclose(ptr);
|
|
return(1);
|
|
}
|
|
|
|
static void *dlfcn_bind_var(DSO *dso, const char *symname)
|
|
{
|
|
void *ptr, *sym;
|
|
|
|
if((dso == NULL) || (symname == NULL))
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
|
|
return(NULL);
|
|
}
|
|
if(sk_num(dso->meth_data) < 1)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
|
|
return(NULL);
|
|
}
|
|
ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
|
|
if(ptr == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
|
|
return(NULL);
|
|
}
|
|
sym = dlsym(ptr, symname);
|
|
if(sym == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
|
|
return(NULL);
|
|
}
|
|
return(sym);
|
|
}
|
|
|
|
static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
|
|
{
|
|
void *ptr;
|
|
DSO_FUNC_TYPE sym;
|
|
|
|
if((dso == NULL) || (symname == NULL))
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
|
|
return(NULL);
|
|
}
|
|
if(sk_num(dso->meth_data) < 1)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
|
|
return(NULL);
|
|
}
|
|
ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
|
|
if(ptr == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
|
|
return(NULL);
|
|
}
|
|
sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
|
|
if(sym == NULL)
|
|
{
|
|
DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
|
|
return(NULL);
|
|
}
|
|
return(sym);
|
|
}
|
|
|
|
static char *dlfcn_name_converter(DSO *dso, const char *filename)
|
|
{
|
|
char *translated;
|
|
int len, rsize, transform;
|
|
|
|
len = strlen(filename);
|
|
rsize = len + 1;
|
|
transform = (strstr(filename, "/") == NULL);
|
|
if(transform)
|
|
{
|
|
/* We will convert this to "%s.so" or "lib%s.so" */
|
|
rsize += 3; /* The length of ".so" */
|
|
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_DLFCN_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.so", filename);
|
|
else
|
|
sprintf(translated, "%s.so", filename);
|
|
}
|
|
else
|
|
sprintf(translated, "%s", filename);
|
|
return(translated);
|
|
}
|
|
|
|
#endif /* DSO_DLFCN */
|