1 /* $OpenBSD: dso_lib.c,v 1.20 2018/08/24 19:27:01 tb Exp $ */
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/crypto.h>
63 #include <openssl/dso.h>
64 #include <openssl/err.h>
66 static DSO_METHOD *default_DSO_meth = NULL;
71 return (DSO_new_method(NULL));
75 DSO_set_default_method(DSO_METHOD *meth)
77 default_DSO_meth = meth;
81 DSO_get_default_method(void)
83 return (default_DSO_meth);
87 DSO_get_method(DSO *dso)
93 DSO_set_method(DSO *dso, DSO_METHOD *meth)
103 DSO_new_method(DSO_METHOD *meth)
107 if (default_DSO_meth == NULL)
108 /* We default to DSO_METH_openssl() which in turn defaults
109 * to stealing the "best available" method. Will fallback
110 * to DSO_METH_null() in the worst case. */
111 default_DSO_meth = DSO_METHOD_openssl();
112 ret = calloc(1, sizeof(DSO));
114 DSOerror(ERR_R_MALLOC_FAILURE);
117 ret->meth_data = sk_void_new_null();
118 if (ret->meth_data == NULL) {
119 /* sk_new doesn't generate any errors so we do */
120 DSOerror(ERR_R_MALLOC_FAILURE);
125 ret->meth = default_DSO_meth;
129 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
142 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
146 i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
150 if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
151 DSOerror(DSO_R_UNLOAD_FAILED);
155 if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
156 DSOerror(DSO_R_FINISH_FAILED);
160 sk_void_free(dso->meth_data);
162 free(dso->loaded_filename);
170 return ((dso == NULL) ? 0 : dso->flags);
180 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
184 refs = CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
185 return ((refs > 1) ? 1 : 0);
189 DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
195 ret = DSO_new_method(meth);
197 DSOerror(ERR_R_MALLOC_FAILURE);
201 /* Pass the provided flags to the new DSO object */
202 if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
203 DSOerror(DSO_R_CTRL_FAILED);
208 /* Don't load if we're currently already loaded */
209 if (ret->filename != NULL) {
210 DSOerror(DSO_R_DSO_ALREADY_LOADED);
213 /* filename can only be NULL if we were passed a dso that already has
215 if (filename != NULL)
216 if (!DSO_set_filename(ret, filename)) {
217 DSOerror(DSO_R_SET_FILENAME_FAILED);
220 filename = ret->filename;
221 if (filename == NULL) {
222 DSOerror(DSO_R_NO_FILENAME);
225 if (ret->meth->dso_load == NULL) {
226 DSOerror(DSO_R_UNSUPPORTED);
229 if (!ret->meth->dso_load(ret)) {
230 DSOerror(DSO_R_LOAD_FAILED);
243 DSO_bind_var(DSO *dso, const char *symname)
247 if ((dso == NULL) || (symname == NULL)) {
248 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
251 if (dso->meth->dso_bind_var == NULL) {
252 DSOerror(DSO_R_UNSUPPORTED);
255 if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
256 DSOerror(DSO_R_SYM_FAILURE);
264 DSO_bind_func(DSO *dso, const char *symname)
266 DSO_FUNC_TYPE ret = NULL;
268 if ((dso == NULL) || (symname == NULL)) {
269 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
272 if (dso->meth->dso_bind_func == NULL) {
273 DSOerror(DSO_R_UNSUPPORTED);
276 if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
277 DSOerror(DSO_R_SYM_FAILURE);
284 /* I don't really like these *_ctrl functions very much to be perfectly
285 * honest. For one thing, I think I have to return a negative value for
286 * any error because possible DSO_ctrl() commands may return values
287 * such as "size"s that can legitimately be zero (making the standard
288 * "if(DSO_cmd(...))" form that works almost everywhere else fail at
289 * odd times. I'd prefer "output" values to be passed by reference and
290 * the return value as success/failure like usual ... but we conform
291 * when we must... :-) */
293 DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
296 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
299 /* We should intercept certain generic commands and only pass control
300 * to the method-specific ctrl() function if it's something we don't
303 case DSO_CTRL_GET_FLAGS:
305 case DSO_CTRL_SET_FLAGS:
306 dso->flags = (int)larg;
308 case DSO_CTRL_OR_FLAGS:
309 dso->flags |= (int)larg;
314 if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
315 DSOerror(DSO_R_UNSUPPORTED);
318 return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
322 DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
323 DSO_NAME_CONVERTER_FUNC *oldcb)
326 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
330 *oldcb = dso->name_converter;
331 dso->name_converter = cb;
336 DSO_get_filename(DSO *dso)
339 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
342 return (dso->filename);
346 DSO_set_filename(DSO *dso, const char *filename)
350 if ((dso == NULL) || (filename == NULL)) {
351 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
354 if (dso->loaded_filename) {
355 DSOerror(DSO_R_DSO_ALREADY_LOADED);
358 /* We'll duplicate filename */
359 copied = strdup(filename);
360 if (copied == NULL) {
361 DSOerror(ERR_R_MALLOC_FAILURE);
365 dso->filename = copied;
370 DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
374 if (dso == NULL || filespec1 == NULL) {
375 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
378 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
379 if (dso->merger != NULL)
380 result = dso->merger(dso, filespec1, filespec2);
381 else if (dso->meth->dso_merger != NULL)
382 result = dso->meth->dso_merger(dso,
383 filespec1, filespec2);
389 DSO_convert_filename(DSO *dso, const char *filename)
394 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
397 if (filename == NULL)
398 filename = dso->filename;
399 if (filename == NULL) {
400 DSOerror(DSO_R_NO_FILENAME);
403 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
404 if (dso->name_converter != NULL)
405 result = dso->name_converter(dso, filename);
406 else if (dso->meth->dso_name_converter != NULL)
407 result = dso->meth->dso_name_converter(dso, filename);
409 if (result == NULL) {
410 result = strdup(filename);
411 if (result == NULL) {
412 DSOerror(ERR_R_MALLOC_FAILURE);
420 DSO_get_loaded_filename(DSO *dso)
423 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
426 return (dso->loaded_filename);
430 DSO_pathbyaddr(void *addr, char *path, int sz)
432 DSO_METHOD *meth = default_DSO_meth;
434 meth = DSO_METHOD_openssl();
435 if (meth->pathbyaddr == NULL) {
436 DSOerror(DSO_R_UNSUPPORTED);
439 return (*meth->pathbyaddr)(addr, path, sz);
443 DSO_global_lookup(const char *name)
445 DSO_METHOD *meth = default_DSO_meth;
447 meth = DSO_METHOD_openssl();
448 if (meth->globallookup == NULL) {
449 DSOerror(DSO_R_UNSUPPORTED);
452 return (*meth->globallookup)(name);