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/* dso_dl.c */
/* Written by Richard Levitte (levitte@openssl.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_DL
DSO_METHOD *DSO_METHOD_dl(void)
{
return NULL;
}
#else
#include <dl.h>
static int dl_load(DSO *dso, const char *filename);
static int dl_unload(DSO *dso);
static int dl_bind(DSO *dso, const char *symname, void **symptr);
#if 0
static int dl_unbind(DSO *dso, char *symname, void *symptr);
static int dl_init(DSO *dso);
static int dl_finish(DSO *dso);
#endif
static DSO_METHOD dso_meth_dl = {
"OpenSSL 'dl' shared library method",
dl_load,
dl_unload,
dl_bind,
/* For now, "unbind" doesn't exist */
#if 0
NULL, /* unbind */
#endif
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, const char *filename)
{
shl_t ptr;
ptr = shl_load(filename, BIND_IMMEDIATE, NULL);
if(ptr == NULL)
{
DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
return(0);
}
if(!sk_push(dso->meth_data, (char *)ptr))
{
DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
shl_unload(ptr);
return(0);
}
return(1);
}
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)
{
DSOerr(DSO_F_DL_UNLOAD,DSO_R_STACK_ERROR);
return(0);
}
/* 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 int dl_bind(DSO *dso, const char *symname, void **symptr)
{
shl_t ptr;
void *sym;
if((dso == NULL) || (symptr == NULL) || (symname == NULL))
{
DSOerr(DSO_F_DL_BIND,ERR_R_PASSED_NULL_PARAMETER);
return(0);
}
if(sk_num(dso->meth_data) < 1)
{
DSOerr(DSO_F_DL_BIND,DSO_R_STACK_ERROR);
return(0);
}
/* Is this actually legal? */
ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
if(ptr == NULL)
{
DSOerr(DSO_F_DL_BIND,DSO_R_NULL_HANDLE);
return(0);
}
if (shl_findsym(ptr, symname, TYPE_UNDEFINED, &sym) < 0)
{
DSOerr(DSO_F_DL_BIND,DSO_R_SYM_FAILURE);
return(0);
}
*symptr = sym;
return(1);
}
#endif /* DSO_DL */
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