3 * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/crypto.h>
63 #include <openssl/dso.h>
65 static DSO_METHOD *default_DSO_meth = NULL;
69 return (DSO_new_method(NULL));
72 void DSO_set_default_method(DSO_METHOD *meth)
74 default_DSO_meth = meth;
77 DSO_METHOD *DSO_get_default_method(void)
79 return (default_DSO_meth);
82 DSO_METHOD *DSO_get_method(DSO *dso)
87 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
95 DSO *DSO_new_method(DSO_METHOD *meth)
99 if (default_DSO_meth == NULL)
101 * We default to DSO_METH_openssl() which in turn defaults to
102 * stealing the "best available" method. Will fallback to
103 * DSO_METH_null() in the worst case.
105 default_DSO_meth = DSO_METHOD_openssl();
106 ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
108 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
111 memset(ret, 0, sizeof(DSO));
112 ret->meth_data = sk_void_new_null();
113 if (ret->meth_data == NULL) {
114 /* sk_new doesn't generate any errors so we do */
115 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
120 ret->meth = default_DSO_meth;
124 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
125 sk_void_free(ret->meth_data);
132 int DSO_free(DSO *dso)
137 DSOerr(DSO_F_DSO_FREE, ERR_R_PASSED_NULL_PARAMETER);
141 i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
143 REF_PRINT("DSO", dso);
149 fprintf(stderr, "DSO_free, bad reference count\n");
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 if (dso->filename != NULL)
166 OPENSSL_free(dso->filename);
167 if (dso->loaded_filename != NULL)
168 OPENSSL_free(dso->loaded_filename);
174 int DSO_flags(DSO *dso)
176 return ((dso == NULL) ? 0 : dso->flags);
179 int DSO_up_ref(DSO *dso)
182 DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
186 CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
190 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
196 ret = DSO_new_method(meth);
198 DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
202 /* Pass the provided flags to the new DSO object */
203 if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
204 DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
209 /* Don't load if we're currently already loaded */
210 if (ret->filename != NULL) {
211 DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
215 * filename can only be NULL if we were passed a dso that already has one
218 if (filename != NULL)
219 if (!DSO_set_filename(ret, filename)) {
220 DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
223 filename = ret->filename;
224 if (filename == NULL) {
225 DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
228 if (ret->meth->dso_load == NULL) {
229 DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
232 if (!ret->meth->dso_load(ret)) {
233 DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
244 void *DSO_bind_var(DSO *dso, const char *symname)
248 if ((dso == NULL) || (symname == NULL)) {
249 DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
252 if (dso->meth->dso_bind_var == NULL) {
253 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
256 if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
257 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
264 DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
266 DSO_FUNC_TYPE ret = NULL;
268 if ((dso == NULL) || (symname == NULL)) {
269 DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
272 if (dso->meth->dso_bind_func == NULL) {
273 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
276 if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
277 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
285 * I don't really like these *_ctrl functions very much to be perfectly
286 * honest. For one thing, I think I have to return a negative value for any
287 * error because possible DSO_ctrl() commands may return values such as
288 * "size"s that can legitimately be zero (making the standard
289 * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
290 * times. I'd prefer "output" values to be passed by reference and the return
291 * value as success/failure like usual ... but we conform when we must... :-)
293 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
296 DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
300 * We should intercept certain generic commands and only pass control to
301 * the method-specific ctrl() function if it's something we don't handle.
304 case DSO_CTRL_GET_FLAGS:
306 case DSO_CTRL_SET_FLAGS:
307 dso->flags = (int)larg;
309 case DSO_CTRL_OR_FLAGS:
310 dso->flags |= (int)larg;
315 if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
316 DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
319 return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
322 int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
323 DSO_NAME_CONVERTER_FUNC *oldcb)
326 DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
330 *oldcb = dso->name_converter;
331 dso->name_converter = cb;
335 const char *DSO_get_filename(DSO *dso)
338 DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
341 return (dso->filename);
344 int DSO_set_filename(DSO *dso, const char *filename)
348 if ((dso == NULL) || (filename == NULL)) {
349 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
352 if (dso->loaded_filename) {
353 DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
356 /* We'll duplicate filename */
357 copied = OPENSSL_malloc(strlen(filename) + 1);
358 if (copied == NULL) {
359 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
362 BUF_strlcpy(copied, filename, strlen(filename) + 1);
364 OPENSSL_free(dso->filename);
365 dso->filename = copied;
369 char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
373 if (dso == NULL || filespec1 == NULL) {
374 DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
377 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
378 if (dso->merger != NULL)
379 result = dso->merger(dso, filespec1, filespec2);
380 else if (dso->meth->dso_merger != NULL)
381 result = dso->meth->dso_merger(dso, filespec1, filespec2);
386 char *DSO_convert_filename(DSO *dso, const char *filename)
391 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
394 if (filename == NULL)
395 filename = dso->filename;
396 if (filename == NULL) {
397 DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
400 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
401 if (dso->name_converter != NULL)
402 result = dso->name_converter(dso, filename);
403 else if (dso->meth->dso_name_converter != NULL)
404 result = dso->meth->dso_name_converter(dso, filename);
406 if (result == NULL) {
407 result = OPENSSL_malloc(strlen(filename) + 1);
408 if (result == NULL) {
409 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
412 BUF_strlcpy(result, filename, strlen(filename) + 1);
417 const char *DSO_get_loaded_filename(DSO *dso)
420 DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
423 return (dso->loaded_filename);
426 int DSO_pathbyaddr(void *addr, char *path, int sz)
428 DSO_METHOD *meth = default_DSO_meth;
430 meth = DSO_METHOD_openssl();
431 if (meth->pathbyaddr == NULL) {
432 DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
435 return (*meth->pathbyaddr) (addr, path, sz);
438 void *DSO_global_lookup(const char *name)
440 DSO_METHOD *meth = default_DSO_meth;
442 meth = DSO_METHOD_openssl();
443 if (meth->globallookup == NULL) {
444 DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
447 return (*meth->globallookup) (name);