ref: c23504631008ce0bfaa5bec48acb2b04f4b49fd9
dir: /sys/src/ape/lib/openssl/crypto/dso/dso_lib.c/
/* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */
/* 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 <openssl/crypto.h>
#include "cryptlib.h"
#include <openssl/dso.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 = (DSO *)OPENSSL_malloc(sizeof(DSO));
if(ret == NULL)
{
DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
return(NULL);
}
memset(ret, 0, sizeof(DSO));
ret->meth_data = sk_new_null();
if(ret->meth_data == NULL)
{
/* sk_new doesn't generate any errors so we do */
DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
OPENSSL_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))
{
OPENSSL_free(ret);
ret=NULL;
}
return(ret);
}
int DSO_free(DSO *dso)
{
int i;
if(dso == NULL)
{
DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
return(0);
}
i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
#ifdef REF_PRINT
REF_PRINT("DSO",dso);
#endif
if(i > 0) return(1);
#ifdef REF_CHECK
if(i < 0)
{
fprintf(stderr,"DSO_free, bad reference count\n");
abort();
}
#endif
if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
{
DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
return(0);
}
if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
{
DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
return(0);
}
sk_free(dso->meth_data);
if(dso->filename != NULL)
OPENSSL_free(dso->filename);
if(dso->loaded_filename != NULL)
OPENSSL_free(dso->loaded_filename);
OPENSSL_free(dso);
return(1);
}
int DSO_flags(DSO *dso)
{
return((dso == NULL) ? 0 : dso->flags);
}
int DSO_up_ref(DSO *dso)
{
if (dso == NULL)
{
DSOerr(DSO_F_DSO_UP_REF,ERR_R_PASSED_NULL_PARAMETER);
return(0);
}
CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
return(1);
}
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)
{
DSOerr(DSO_F_DSO_LOAD,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)
{
DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
goto err;
}
}
else
ret = dso;
/* Don't load if we're currently already loaded */
if(ret->filename != NULL)
{
DSOerr(DSO_F_DSO_LOAD,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))
{
DSOerr(DSO_F_DSO_LOAD,DSO_R_SET_FILENAME_FAILED);
goto err;
}
filename = ret->filename;
if(filename == NULL)
{
DSOerr(DSO_F_DSO_LOAD,DSO_R_NO_FILENAME);
goto err;
}
if(ret->meth->dso_load == NULL)
{
DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
goto err;
}
if(!ret->meth->dso_load(ret))
{
DSOerr(DSO_F_DSO_LOAD,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))
{
DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
if(dso->meth->dso_bind_var == NULL)
{
DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);
return(NULL);
}
if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)
{
DSOerr(DSO_F_DSO_BIND_VAR,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))
{
DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
if(dso->meth->dso_bind_func == NULL)
{
DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);
return(NULL);
}
if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)
{
DSOerr(DSO_F_DSO_BIND_FUNC,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)
{
DSOerr(DSO_F_DSO_CTRL,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))
{
DSOerr(DSO_F_DSO_CTRL,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)
{
DSOerr(DSO_F_DSO_SET_NAME_CONVERTER,
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)
{
DSOerr(DSO_F_DSO_GET_FILENAME,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))
{
DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
return(0);
}
if(dso->loaded_filename)
{
DSOerr(DSO_F_DSO_SET_FILENAME,DSO_R_DSO_ALREADY_LOADED);
return(0);
}
/* We'll duplicate filename */
copied = OPENSSL_malloc(strlen(filename) + 1);
if(copied == NULL)
{
DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_MALLOC_FAILURE);
return(0);
}
BUF_strlcpy(copied, filename, strlen(filename) + 1);
if(dso->filename)
OPENSSL_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)
{
DSOerr(DSO_F_DSO_MERGE,ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
if(filespec1 == NULL)
filespec1 = dso->filename;
if(filespec1 == NULL)
{
DSOerr(DSO_F_DSO_MERGE,DSO_R_NO_FILE_SPECIFICATION);
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)
{
DSOerr(DSO_F_DSO_CONVERT_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
if(filename == NULL)
filename = dso->filename;
if(filename == NULL)
{
DSOerr(DSO_F_DSO_CONVERT_FILENAME,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 = OPENSSL_malloc(strlen(filename) + 1);
if(result == NULL)
{
DSOerr(DSO_F_DSO_CONVERT_FILENAME,
ERR_R_MALLOC_FAILURE);
return(NULL);
}
BUF_strlcpy(result, filename, strlen(filename) + 1);
}
return(result);
}
const char *DSO_get_loaded_filename(DSO *dso)
{
if(dso == NULL)
{
DSOerr(DSO_F_DSO_GET_LOADED_FILENAME,
ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
return(dso->loaded_filename);
}