2 * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
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).
60 #include <openssl/crypto.h>
61 #include "internal/cryptlib.h"
62 #include <openssl/dso.h>
64 static DSO_METHOD *default_DSO_meth = NULL;
68 return (DSO_new_method(NULL));
71 void DSO_set_default_method(DSO_METHOD *meth)
73 default_DSO_meth = meth;
76 DSO_METHOD *DSO_get_default_method(void)
78 return (default_DSO_meth);
81 DSO_METHOD *DSO_get_method(DSO *dso)
86 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
94 DSO *DSO_new_method(DSO_METHOD *meth)
98 if (default_DSO_meth == NULL) {
100 * We default to DSO_METH_openssl() which in turn defaults to
101 * stealing the "best available" method. Will fallback to
102 * DSO_METH_null() in the worst case.
104 default_DSO_meth = DSO_METHOD_openssl();
106 ret = OPENSSL_zalloc(sizeof(*ret));
108 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
111 ret->meth_data = sk_void_new_null();
112 if (ret->meth_data == NULL) {
113 /* sk_new doesn't generate any errors so we do */
114 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
119 ret->meth = default_DSO_meth;
123 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
124 sk_void_free(ret->meth_data);
131 int DSO_free(DSO *dso)
138 i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
139 REF_PRINT_COUNT("DSO", dso);
142 REF_ASSERT_ISNT(i < 0);
144 if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
145 DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
149 if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
150 DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
154 sk_void_free(dso->meth_data);
155 OPENSSL_free(dso->filename);
156 OPENSSL_free(dso->loaded_filename);
161 int DSO_flags(DSO *dso)
163 return ((dso == NULL) ? 0 : dso->flags);
166 int DSO_up_ref(DSO *dso)
169 DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
173 CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
177 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
183 ret = DSO_new_method(meth);
185 DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
189 /* Pass the provided flags to the new DSO object */
190 if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
191 DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
196 /* Don't load if we're currently already loaded */
197 if (ret->filename != NULL) {
198 DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
202 * filename can only be NULL if we were passed a dso that already has one
205 if (filename != NULL)
206 if (!DSO_set_filename(ret, filename)) {
207 DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
210 filename = ret->filename;
211 if (filename == NULL) {
212 DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
215 if (ret->meth->dso_load == NULL) {
216 DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
219 if (!ret->meth->dso_load(ret)) {
220 DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
231 void *DSO_bind_var(DSO *dso, const char *symname)
235 if ((dso == NULL) || (symname == NULL)) {
236 DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
239 if (dso->meth->dso_bind_var == NULL) {
240 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
243 if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
244 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
251 DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
253 DSO_FUNC_TYPE ret = NULL;
255 if ((dso == NULL) || (symname == NULL)) {
256 DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
259 if (dso->meth->dso_bind_func == NULL) {
260 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
263 if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
264 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
272 * I don't really like these *_ctrl functions very much to be perfectly
273 * honest. For one thing, I think I have to return a negative value for any
274 * error because possible DSO_ctrl() commands may return values such as
275 * "size"s that can legitimately be zero (making the standard
276 * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
277 * times. I'd prefer "output" values to be passed by reference and the return
278 * value as success/failure like usual ... but we conform when we must... :-)
280 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
283 DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
287 * We should intercept certain generic commands and only pass control to
288 * the method-specific ctrl() function if it's something we don't handle.
291 case DSO_CTRL_GET_FLAGS:
293 case DSO_CTRL_SET_FLAGS:
294 dso->flags = (int)larg;
296 case DSO_CTRL_OR_FLAGS:
297 dso->flags |= (int)larg;
302 if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
303 DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
306 return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
309 int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
310 DSO_NAME_CONVERTER_FUNC *oldcb)
313 DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
317 *oldcb = dso->name_converter;
318 dso->name_converter = cb;
322 const char *DSO_get_filename(DSO *dso)
325 DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
328 return (dso->filename);
331 int DSO_set_filename(DSO *dso, const char *filename)
335 if ((dso == NULL) || (filename == NULL)) {
336 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
339 if (dso->loaded_filename) {
340 DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
343 /* We'll duplicate filename */
344 copied = OPENSSL_malloc(strlen(filename) + 1);
345 if (copied == NULL) {
346 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
349 OPENSSL_strlcpy(copied, filename, strlen(filename) + 1);
350 OPENSSL_free(dso->filename);
351 dso->filename = copied;
355 char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
359 if (dso == NULL || filespec1 == NULL) {
360 DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
363 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
364 if (dso->merger != NULL)
365 result = dso->merger(dso, filespec1, filespec2);
366 else if (dso->meth->dso_merger != NULL)
367 result = dso->meth->dso_merger(dso, filespec1, filespec2);
372 char *DSO_convert_filename(DSO *dso, const char *filename)
377 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
380 if (filename == NULL)
381 filename = dso->filename;
382 if (filename == NULL) {
383 DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
386 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
387 if (dso->name_converter != NULL)
388 result = dso->name_converter(dso, filename);
389 else if (dso->meth->dso_name_converter != NULL)
390 result = dso->meth->dso_name_converter(dso, filename);
392 if (result == NULL) {
393 result = OPENSSL_malloc(strlen(filename) + 1);
394 if (result == NULL) {
395 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
398 OPENSSL_strlcpy(result, filename, strlen(filename) + 1);
403 const char *DSO_get_loaded_filename(DSO *dso)
406 DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
409 return (dso->loaded_filename);
412 int DSO_pathbyaddr(void *addr, char *path, int sz)
414 DSO_METHOD *meth = default_DSO_meth;
416 meth = DSO_METHOD_openssl();
417 if (meth->pathbyaddr == NULL) {
418 DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
421 return (*meth->pathbyaddr) (addr, path, sz);
424 void *DSO_global_lookup(const char *name)
426 DSO_METHOD *meth = default_DSO_meth;
428 meth = DSO_METHOD_openssl();
429 if (meth->globallookup == NULL) {
430 DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
433 return (*meth->globallookup) (name);