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)
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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).
61 static DSO_METHOD *default_DSO_meth = NULL;
65 return (DSO_new_method(NULL));
68 void DSO_set_default_method(DSO_METHOD *meth)
70 default_DSO_meth = meth;
73 DSO_METHOD *DSO_get_default_method(void)
75 return (default_DSO_meth);
78 DSO_METHOD *DSO_get_method(DSO *dso)
83 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
91 DSO *DSO_new_method(DSO_METHOD *meth)
95 if (default_DSO_meth == NULL) {
97 * We default to DSO_METH_openssl() which in turn defaults to
98 * stealing the "best available" method. Will fallback to
99 * DSO_METH_null() in the worst case.
101 default_DSO_meth = DSO_METHOD_openssl();
103 ret = OPENSSL_zalloc(sizeof(*ret));
105 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
108 ret->meth_data = sk_void_new_null();
109 if (ret->meth_data == NULL) {
110 /* sk_new doesn't generate any errors so we do */
111 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
116 ret->meth = default_DSO_meth;
121 ret->lock = CRYPTO_THREAD_lock_new();
122 if (ret->lock == NULL) {
123 sk_void_free(ret->meth_data);
128 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
136 int DSO_free(DSO *dso)
143 if (CRYPTO_atomic_add(&dso->references, -1, &i, dso->lock) <= 0)
146 REF_PRINT_COUNT("DSO", dso);
149 REF_ASSERT_ISNT(i < 0);
151 if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
152 DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
156 if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
157 DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
161 sk_void_free(dso->meth_data);
162 OPENSSL_free(dso->filename);
163 OPENSSL_free(dso->loaded_filename);
164 CRYPTO_THREAD_lock_free(dso->lock);
169 int DSO_flags(DSO *dso)
171 return ((dso == NULL) ? 0 : dso->flags);
174 int DSO_up_ref(DSO *dso)
179 DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
183 if (CRYPTO_atomic_add(&dso->references, 1, &i, dso->lock) <= 0)
186 REF_PRINT_COUNT("DSO", r);
187 REF_ASSERT_ISNT(i < 2);
188 return ((i > 1) ? 1 : 0);
191 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
197 ret = DSO_new_method(meth);
199 DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
203 /* Pass the provided flags to the new DSO object */
204 if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
205 DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
210 /* Don't load if we're currently already loaded */
211 if (ret->filename != NULL) {
212 DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
216 * filename can only be NULL if we were passed a dso that already has one
219 if (filename != NULL)
220 if (!DSO_set_filename(ret, filename)) {
221 DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
224 filename = ret->filename;
225 if (filename == NULL) {
226 DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
229 if (ret->meth->dso_load == NULL) {
230 DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
233 if (!ret->meth->dso_load(ret)) {
234 DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
245 void *DSO_bind_var(DSO *dso, const char *symname)
249 if ((dso == NULL) || (symname == NULL)) {
250 DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
253 if (dso->meth->dso_bind_var == NULL) {
254 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
257 if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
258 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
265 DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
267 DSO_FUNC_TYPE ret = NULL;
269 if ((dso == NULL) || (symname == NULL)) {
270 DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
273 if (dso->meth->dso_bind_func == NULL) {
274 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
277 if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
278 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
286 * I don't really like these *_ctrl functions very much to be perfectly
287 * honest. For one thing, I think I have to return a negative value for any
288 * error because possible DSO_ctrl() commands may return values such as
289 * "size"s that can legitimately be zero (making the standard
290 * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
291 * times. I'd prefer "output" values to be passed by reference and the return
292 * value as success/failure like usual ... but we conform when we must... :-)
294 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
297 DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
301 * We should intercept certain generic commands and only pass control to
302 * the method-specific ctrl() function if it's something we don't handle.
305 case DSO_CTRL_GET_FLAGS:
307 case DSO_CTRL_SET_FLAGS:
308 dso->flags = (int)larg;
310 case DSO_CTRL_OR_FLAGS:
311 dso->flags |= (int)larg;
316 if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
317 DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
320 return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
323 int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
324 DSO_NAME_CONVERTER_FUNC *oldcb)
327 DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
331 *oldcb = dso->name_converter;
332 dso->name_converter = cb;
336 const char *DSO_get_filename(DSO *dso)
339 DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
342 return (dso->filename);
345 int DSO_set_filename(DSO *dso, const char *filename)
349 if ((dso == NULL) || (filename == NULL)) {
350 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
353 if (dso->loaded_filename) {
354 DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
357 /* We'll duplicate filename */
358 copied = OPENSSL_strdup(filename);
359 if (copied == NULL) {
360 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
363 OPENSSL_free(dso->filename);
364 dso->filename = copied;
368 char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
372 if (dso == NULL || filespec1 == NULL) {
373 DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
376 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
377 if (dso->merger != NULL)
378 result = dso->merger(dso, filespec1, filespec2);
379 else if (dso->meth->dso_merger != NULL)
380 result = dso->meth->dso_merger(dso, filespec1, filespec2);
385 char *DSO_convert_filename(DSO *dso, const char *filename)
390 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
393 if (filename == NULL)
394 filename = dso->filename;
395 if (filename == NULL) {
396 DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
399 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
400 if (dso->name_converter != NULL)
401 result = dso->name_converter(dso, filename);
402 else if (dso->meth->dso_name_converter != NULL)
403 result = dso->meth->dso_name_converter(dso, filename);
405 if (result == NULL) {
406 result = OPENSSL_strdup(filename);
407 if (result == NULL) {
408 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
415 const char *DSO_get_loaded_filename(DSO *dso)
418 DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
421 return (dso->loaded_filename);
424 int DSO_pathbyaddr(void *addr, char *path, int sz)
426 DSO_METHOD *meth = default_DSO_meth;
428 meth = DSO_METHOD_openssl();
429 if (meth->pathbyaddr == NULL) {
430 DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
433 return (*meth->pathbyaddr) (addr, path, sz);
436 void *DSO_global_lookup(const char *name)
438 DSO_METHOD *meth = default_DSO_meth;
440 meth = DSO_METHOD_openssl();
441 if (meth->globallookup == NULL) {
442 DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
445 return (*meth->globallookup) (name);