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|
/* $OpenBSD: dso_lib.c,v 1.20 2018/08/24 19:27:01 tb Exp $ */
/* 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 <string.h>
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/err.h>
static DSO_METHOD *default_DSO_meth = NULL;
DSO *
DSO_new(void)
{
return (DSO_new_method(NULL));
}
void
DSO_set_default_method(DSO_METHOD *meth)
{
default_DSO_meth = meth;
}
DSO_METHOD *
DSO_get_default_method(void)
{
return (default_DSO_meth);
}
DSO_METHOD *
DSO_get_method(DSO *dso)
{
return (dso->meth);
}
DSO_METHOD *
DSO_set_method(DSO *dso, DSO_METHOD *meth)
{
DSO_METHOD *mtmp;
mtmp = dso->meth;
dso->meth = meth;
return (mtmp);
}
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 = calloc(1, sizeof(DSO));
if (ret == NULL) {
DSOerror(ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->meth_data = sk_void_new_null();
if (ret->meth_data == NULL) {
/* sk_new doesn't generate any errors so we do */
DSOerror(ERR_R_MALLOC_FAILURE);
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)) {
free(ret);
ret = NULL;
}
return (ret);
}
int
DSO_free(DSO *dso)
{
int i;
if (dso == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
if (i > 0)
return (1);
if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
DSOerror(DSO_R_UNLOAD_FAILED);
return (0);
}
if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
DSOerror(DSO_R_FINISH_FAILED);
return (0);
}
sk_void_free(dso->meth_data);
free(dso->filename);
free(dso->loaded_filename);
free(dso);
return (1);
}
int
DSO_flags(DSO *dso)
{
return ((dso == NULL) ? 0 : dso->flags);
}
int
DSO_up_ref(DSO *dso)
{
int refs;
if (dso == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
refs = CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
return ((refs > 1) ? 1 : 0);
}
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) {
DSOerror(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) {
DSOerror(DSO_R_CTRL_FAILED);
goto err;
}
} else
ret = dso;
/* Don't load if we're currently already loaded */
if (ret->filename != NULL) {
DSOerror(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)) {
DSOerror(DSO_R_SET_FILENAME_FAILED);
goto err;
}
filename = ret->filename;
if (filename == NULL) {
DSOerror(DSO_R_NO_FILENAME);
goto err;
}
if (ret->meth->dso_load == NULL) {
DSOerror(DSO_R_UNSUPPORTED);
goto err;
}
if (!ret->meth->dso_load(ret)) {
DSOerror(DSO_R_LOAD_FAILED);
goto err;
}
/* Load succeeded */
return (ret);
err:
if (allocated)
DSO_free(ret);
return (NULL);
}
void *
DSO_bind_var(DSO *dso, const char *symname)
{
void *ret = NULL;
if ((dso == NULL) || (symname == NULL)) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (NULL);
}
if (dso->meth->dso_bind_var == NULL) {
DSOerror(DSO_R_UNSUPPORTED);
return (NULL);
}
if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
DSOerror(DSO_R_SYM_FAILURE);
return (NULL);
}
/* Success */
return (ret);
}
DSO_FUNC_TYPE
DSO_bind_func(DSO *dso, const char *symname)
{
DSO_FUNC_TYPE ret = NULL;
if ((dso == NULL) || (symname == NULL)) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (NULL);
}
if (dso->meth->dso_bind_func == NULL) {
DSOerror(DSO_R_UNSUPPORTED);
return (NULL);
}
if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
DSOerror(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... :-) */
long
DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
{
if (dso == NULL) {
DSOerror(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)) {
DSOerror(DSO_R_UNSUPPORTED);
return (-1);
}
return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
}
int
DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
DSO_NAME_CONVERTER_FUNC *oldcb)
{
if (dso == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (oldcb)
*oldcb = dso->name_converter;
dso->name_converter = cb;
return (1);
}
const char *
DSO_get_filename(DSO *dso)
{
if (dso == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (NULL);
}
return (dso->filename);
}
int
DSO_set_filename(DSO *dso, const char *filename)
{
char *copied;
if ((dso == NULL) || (filename == NULL)) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (dso->loaded_filename) {
DSOerror(DSO_R_DSO_ALREADY_LOADED);
return (0);
}
/* We'll duplicate filename */
copied = strdup(filename);
if (copied == NULL) {
DSOerror(ERR_R_MALLOC_FAILURE);
return (0);
}
free(dso->filename);
dso->filename = copied;
return (1);
}
char *
DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
{
char *result = NULL;
if (dso == NULL || filespec1 == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
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);
}
char *
DSO_convert_filename(DSO *dso, const char *filename)
{
char *result = NULL;
if (dso == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (NULL);
}
if (filename == NULL)
filename = dso->filename;
if (filename == NULL) {
DSOerror(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 = strdup(filename);
if (result == NULL) {
DSOerror(ERR_R_MALLOC_FAILURE);
return (NULL);
}
}
return (result);
}
const char *
DSO_get_loaded_filename(DSO *dso)
{
if (dso == NULL) {
DSOerror(ERR_R_PASSED_NULL_PARAMETER);
return (NULL);
}
return (dso->loaded_filename);
}
int
DSO_pathbyaddr(void *addr, char *path, int sz)
{
DSO_METHOD *meth = default_DSO_meth;
if (meth == NULL)
meth = DSO_METHOD_openssl();
if (meth->pathbyaddr == NULL) {
DSOerror(DSO_R_UNSUPPORTED);
return -1;
}
return (*meth->pathbyaddr)(addr, path, sz);
}
void *
DSO_global_lookup(const char *name)
{
DSO_METHOD *meth = default_DSO_meth;
if (meth == NULL)
meth = DSO_METHOD_openssl();
if (meth->globallookup == NULL) {
DSOerror(DSO_R_UNSUPPORTED);
return NULL;
}
return (*meth->globallookup)(name);
}
|