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;
124 ret->lock = CRYPTO_THREAD_lock_new();
125 if (ret->lock == NULL) {
126 sk_void_free(ret->meth_data);
131 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
139 int DSO_free(DSO *dso)
146 if (CRYPTO_atomic_add(&dso->references, -1, &i, dso->lock) <= 0)
149 REF_PRINT_COUNT("DSO", dso);
152 REF_ASSERT_ISNT(i < 0);
154 if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
155 DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
159 if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
160 DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
164 sk_void_free(dso->meth_data);
165 OPENSSL_free(dso->filename);
166 OPENSSL_free(dso->loaded_filename);
167 CRYPTO_THREAD_lock_free(dso->lock);
172 int DSO_flags(DSO *dso)
174 return ((dso == NULL) ? 0 : dso->flags);
177 int DSO_up_ref(DSO *dso)
182 DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
186 if (CRYPTO_atomic_add(&dso->references, 1, &i, dso->lock) <= 0)
189 REF_PRINT_COUNT("DSO", r);
190 REF_ASSERT_ISNT(i < 2);
191 return ((i > 1) ? 1 : 0);
194 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
200 ret = DSO_new_method(meth);
202 DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
206 /* Pass the provided flags to the new DSO object */
207 if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
208 DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
213 /* Don't load if we're currently already loaded */
214 if (ret->filename != NULL) {
215 DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
219 * filename can only be NULL if we were passed a dso that already has one
222 if (filename != NULL)
223 if (!DSO_set_filename(ret, filename)) {
224 DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
227 filename = ret->filename;
228 if (filename == NULL) {
229 DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
232 if (ret->meth->dso_load == NULL) {
233 DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
236 if (!ret->meth->dso_load(ret)) {
237 DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
248 void *DSO_bind_var(DSO *dso, const char *symname)
252 if ((dso == NULL) || (symname == NULL)) {
253 DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
256 if (dso->meth->dso_bind_var == NULL) {
257 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
260 if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
261 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
268 DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
270 DSO_FUNC_TYPE ret = NULL;
272 if ((dso == NULL) || (symname == NULL)) {
273 DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
276 if (dso->meth->dso_bind_func == NULL) {
277 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
280 if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
281 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
289 * I don't really like these *_ctrl functions very much to be perfectly
290 * honest. For one thing, I think I have to return a negative value for any
291 * error because possible DSO_ctrl() commands may return values such as
292 * "size"s that can legitimately be zero (making the standard
293 * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
294 * times. I'd prefer "output" values to be passed by reference and the return
295 * value as success/failure like usual ... but we conform when we must... :-)
297 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
300 DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
304 * We should intercept certain generic commands and only pass control to
305 * the method-specific ctrl() function if it's something we don't handle.
308 case DSO_CTRL_GET_FLAGS:
310 case DSO_CTRL_SET_FLAGS:
311 dso->flags = (int)larg;
313 case DSO_CTRL_OR_FLAGS:
314 dso->flags |= (int)larg;
319 if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
320 DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
323 return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
326 int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
327 DSO_NAME_CONVERTER_FUNC *oldcb)
330 DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
334 *oldcb = dso->name_converter;
335 dso->name_converter = cb;
339 const char *DSO_get_filename(DSO *dso)
342 DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
345 return (dso->filename);
348 int DSO_set_filename(DSO *dso, const char *filename)
352 if ((dso == NULL) || (filename == NULL)) {
353 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
356 if (dso->loaded_filename) {
357 DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
360 /* We'll duplicate filename */
361 copied = OPENSSL_strdup(filename);
362 if (copied == NULL) {
363 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
366 OPENSSL_free(dso->filename);
367 dso->filename = copied;
371 char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
375 if (dso == NULL || filespec1 == NULL) {
376 DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
379 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
380 if (dso->merger != NULL)
381 result = dso->merger(dso, filespec1, filespec2);
382 else if (dso->meth->dso_merger != NULL)
383 result = dso->meth->dso_merger(dso, filespec1, filespec2);
388 char *DSO_convert_filename(DSO *dso, const char *filename)
393 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
396 if (filename == NULL)
397 filename = dso->filename;
398 if (filename == NULL) {
399 DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
402 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
403 if (dso->name_converter != NULL)
404 result = dso->name_converter(dso, filename);
405 else if (dso->meth->dso_name_converter != NULL)
406 result = dso->meth->dso_name_converter(dso, filename);
408 if (result == NULL) {
409 result = OPENSSL_strdup(filename);
410 if (result == NULL) {
411 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
418 const char *DSO_get_loaded_filename(DSO *dso)
421 DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
424 return (dso->loaded_filename);
427 int DSO_pathbyaddr(void *addr, char *path, int sz)
429 DSO_METHOD *meth = default_DSO_meth;
431 meth = DSO_METHOD_openssl();
432 if (meth->pathbyaddr == NULL) {
433 DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
436 return (*meth->pathbyaddr) (addr, path, sz);
439 void *DSO_global_lookup(const char *name)
441 DSO_METHOD *meth = default_DSO_meth;
443 meth = DSO_METHOD_openssl();
444 if (meth->globallookup == NULL) {
445 DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
448 return (*meth->globallookup) (name);