Line data Source code
1 : /* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */
2 : /*
3 : * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
4 : * 2000.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
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
19 : * distribution.
20 : *
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/)"
25 : *
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.
30 : *
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.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
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 : * ====================================================================
53 : *
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).
57 : *
58 : */
59 :
60 : #include <stdio.h>
61 : #include <openssl/crypto.h>
62 : #include "cryptlib.h"
63 : #include <openssl/dso.h>
64 :
65 : static DSO_METHOD *default_DSO_meth = NULL;
66 :
67 0 : DSO *DSO_new(void)
68 : {
69 0 : return (DSO_new_method(NULL));
70 : }
71 :
72 0 : void DSO_set_default_method(DSO_METHOD *meth)
73 : {
74 0 : default_DSO_meth = meth;
75 0 : }
76 :
77 0 : DSO_METHOD *DSO_get_default_method(void)
78 : {
79 0 : return (default_DSO_meth);
80 : }
81 :
82 0 : DSO_METHOD *DSO_get_method(DSO *dso)
83 : {
84 0 : return (dso->meth);
85 : }
86 :
87 0 : DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
88 : {
89 : DSO_METHOD *mtmp;
90 0 : mtmp = dso->meth;
91 0 : dso->meth = meth;
92 0 : return (mtmp);
93 : }
94 :
95 0 : DSO *DSO_new_method(DSO_METHOD *meth)
96 : {
97 : DSO *ret;
98 :
99 0 : if (default_DSO_meth == NULL)
100 : /*
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.
104 : */
105 0 : default_DSO_meth = DSO_METHOD_openssl();
106 0 : ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
107 0 : if (ret == NULL) {
108 0 : DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
109 0 : return (NULL);
110 : }
111 : memset(ret, 0, sizeof(DSO));
112 0 : ret->meth_data = sk_void_new_null();
113 0 : if (ret->meth_data == NULL) {
114 : /* sk_new doesn't generate any errors so we do */
115 0 : DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
116 0 : OPENSSL_free(ret);
117 0 : return (NULL);
118 : }
119 0 : if (meth == NULL)
120 0 : ret->meth = default_DSO_meth;
121 : else
122 0 : ret->meth = meth;
123 0 : ret->references = 1;
124 0 : if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
125 0 : OPENSSL_free(ret);
126 : ret = NULL;
127 : }
128 0 : return (ret);
129 : }
130 :
131 0 : int DSO_free(DSO *dso)
132 : {
133 : int i;
134 :
135 0 : if (dso == NULL) {
136 0 : DSOerr(DSO_F_DSO_FREE, ERR_R_PASSED_NULL_PARAMETER);
137 0 : return (0);
138 : }
139 :
140 0 : i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
141 : #ifdef REF_PRINT
142 : REF_PRINT("DSO", dso);
143 : #endif
144 0 : if (i > 0)
145 : return (1);
146 : #ifdef REF_CHECK
147 : if (i < 0) {
148 : fprintf(stderr, "DSO_free, bad reference count\n");
149 : abort();
150 : }
151 : #endif
152 :
153 0 : if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
154 0 : DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
155 0 : return (0);
156 : }
157 :
158 0 : if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
159 0 : DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
160 0 : return (0);
161 : }
162 :
163 0 : sk_void_free(dso->meth_data);
164 0 : if (dso->filename != NULL)
165 0 : OPENSSL_free(dso->filename);
166 0 : if (dso->loaded_filename != NULL)
167 0 : OPENSSL_free(dso->loaded_filename);
168 :
169 0 : OPENSSL_free(dso);
170 0 : return (1);
171 : }
172 :
173 0 : int DSO_flags(DSO *dso)
174 : {
175 0 : return ((dso == NULL) ? 0 : dso->flags);
176 : }
177 :
178 0 : int DSO_up_ref(DSO *dso)
179 : {
180 0 : if (dso == NULL) {
181 0 : DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
182 0 : return (0);
183 : }
184 :
185 0 : CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
186 0 : return (1);
187 : }
188 :
189 0 : DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
190 : {
191 : DSO *ret;
192 : int allocated = 0;
193 :
194 0 : if (dso == NULL) {
195 0 : ret = DSO_new_method(meth);
196 0 : if (ret == NULL) {
197 0 : DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
198 0 : goto err;
199 : }
200 : allocated = 1;
201 : /* Pass the provided flags to the new DSO object */
202 0 : if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
203 0 : DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
204 0 : goto err;
205 : }
206 : } else
207 : ret = dso;
208 : /* Don't load if we're currently already loaded */
209 0 : if (ret->filename != NULL) {
210 0 : DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
211 0 : goto err;
212 : }
213 : /*
214 : * filename can only be NULL if we were passed a dso that already has one
215 : * set.
216 : */
217 0 : if (filename != NULL)
218 0 : if (!DSO_set_filename(ret, filename)) {
219 0 : DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
220 0 : goto err;
221 : }
222 0 : filename = ret->filename;
223 0 : if (filename == NULL) {
224 0 : DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
225 0 : goto err;
226 : }
227 0 : if (ret->meth->dso_load == NULL) {
228 0 : DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
229 0 : goto err;
230 : }
231 0 : if (!ret->meth->dso_load(ret)) {
232 0 : DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
233 0 : goto err;
234 : }
235 : /* Load succeeded */
236 : return (ret);
237 : err:
238 0 : if (allocated)
239 0 : DSO_free(ret);
240 : return (NULL);
241 : }
242 :
243 0 : void *DSO_bind_var(DSO *dso, const char *symname)
244 : {
245 : void *ret = NULL;
246 :
247 0 : if ((dso == NULL) || (symname == NULL)) {
248 0 : DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
249 0 : return (NULL);
250 : }
251 0 : if (dso->meth->dso_bind_var == NULL) {
252 0 : DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
253 0 : return (NULL);
254 : }
255 0 : if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
256 0 : DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
257 0 : return (NULL);
258 : }
259 : /* Success */
260 : return (ret);
261 : }
262 :
263 0 : DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
264 : {
265 : DSO_FUNC_TYPE ret = NULL;
266 :
267 0 : if ((dso == NULL) || (symname == NULL)) {
268 0 : DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
269 0 : return (NULL);
270 : }
271 0 : if (dso->meth->dso_bind_func == NULL) {
272 0 : DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
273 0 : return (NULL);
274 : }
275 0 : if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
276 0 : DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
277 0 : return (NULL);
278 : }
279 : /* Success */
280 : return (ret);
281 : }
282 :
283 : /*
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 any
286 : * error because possible DSO_ctrl() commands may return values such as
287 : * "size"s that can legitimately be zero (making the standard
288 : * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
289 : * times. I'd prefer "output" values to be passed by reference and the return
290 : * value as success/failure like usual ... but we conform when we must... :-)
291 : */
292 0 : long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
293 : {
294 0 : if (dso == NULL) {
295 0 : DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
296 0 : return (-1);
297 : }
298 : /*
299 : * We should intercept certain generic commands and only pass control to
300 : * the method-specific ctrl() function if it's something we don't handle.
301 : */
302 0 : switch (cmd) {
303 : case DSO_CTRL_GET_FLAGS:
304 0 : return dso->flags;
305 : case DSO_CTRL_SET_FLAGS:
306 0 : dso->flags = (int)larg;
307 0 : return (0);
308 : case DSO_CTRL_OR_FLAGS:
309 0 : dso->flags |= (int)larg;
310 0 : return (0);
311 : default:
312 : break;
313 : }
314 0 : if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
315 0 : DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
316 0 : return (-1);
317 : }
318 0 : return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
319 : }
320 :
321 0 : int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
322 : DSO_NAME_CONVERTER_FUNC *oldcb)
323 : {
324 0 : if (dso == NULL) {
325 0 : DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
326 0 : return (0);
327 : }
328 0 : if (oldcb)
329 0 : *oldcb = dso->name_converter;
330 0 : dso->name_converter = cb;
331 0 : return (1);
332 : }
333 :
334 0 : const char *DSO_get_filename(DSO *dso)
335 : {
336 0 : if (dso == NULL) {
337 0 : DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
338 0 : return (NULL);
339 : }
340 0 : return (dso->filename);
341 : }
342 :
343 0 : int DSO_set_filename(DSO *dso, const char *filename)
344 : {
345 : char *copied;
346 :
347 0 : if ((dso == NULL) || (filename == NULL)) {
348 0 : DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
349 0 : return (0);
350 : }
351 0 : if (dso->loaded_filename) {
352 0 : DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
353 0 : return (0);
354 : }
355 : /* We'll duplicate filename */
356 0 : copied = OPENSSL_malloc(strlen(filename) + 1);
357 0 : if (copied == NULL) {
358 0 : DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
359 0 : return (0);
360 : }
361 0 : BUF_strlcpy(copied, filename, strlen(filename) + 1);
362 0 : if (dso->filename)
363 0 : OPENSSL_free(dso->filename);
364 0 : dso->filename = copied;
365 0 : return (1);
366 : }
367 :
368 0 : char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
369 : {
370 : char *result = NULL;
371 :
372 0 : if (dso == NULL || filespec1 == NULL) {
373 0 : DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
374 0 : return (NULL);
375 : }
376 0 : if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
377 0 : if (dso->merger != NULL)
378 0 : result = dso->merger(dso, filespec1, filespec2);
379 0 : else if (dso->meth->dso_merger != NULL)
380 0 : result = dso->meth->dso_merger(dso, filespec1, filespec2);
381 : }
382 0 : return (result);
383 : }
384 :
385 0 : char *DSO_convert_filename(DSO *dso, const char *filename)
386 : {
387 : char *result = NULL;
388 :
389 0 : if (dso == NULL) {
390 0 : DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
391 0 : return (NULL);
392 : }
393 0 : if (filename == NULL)
394 0 : filename = dso->filename;
395 0 : if (filename == NULL) {
396 0 : DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
397 0 : return (NULL);
398 : }
399 0 : if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
400 0 : if (dso->name_converter != NULL)
401 0 : result = dso->name_converter(dso, filename);
402 0 : else if (dso->meth->dso_name_converter != NULL)
403 0 : result = dso->meth->dso_name_converter(dso, filename);
404 : }
405 0 : if (result == NULL) {
406 0 : result = OPENSSL_malloc(strlen(filename) + 1);
407 0 : if (result == NULL) {
408 0 : DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
409 0 : return (NULL);
410 : }
411 0 : BUF_strlcpy(result, filename, strlen(filename) + 1);
412 : }
413 0 : return (result);
414 : }
415 :
416 0 : const char *DSO_get_loaded_filename(DSO *dso)
417 : {
418 0 : if (dso == NULL) {
419 0 : DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
420 0 : return (NULL);
421 : }
422 0 : return (dso->loaded_filename);
423 : }
424 :
425 0 : int DSO_pathbyaddr(void *addr, char *path, int sz)
426 : {
427 0 : DSO_METHOD *meth = default_DSO_meth;
428 0 : if (meth == NULL)
429 0 : meth = DSO_METHOD_openssl();
430 0 : if (meth->pathbyaddr == NULL) {
431 0 : DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
432 0 : return -1;
433 : }
434 0 : return (*meth->pathbyaddr) (addr, path, sz);
435 : }
436 :
437 0 : void *DSO_global_lookup(const char *name)
438 : {
439 0 : DSO_METHOD *meth = default_DSO_meth;
440 0 : if (meth == NULL)
441 0 : meth = DSO_METHOD_openssl();
442 0 : if (meth->globallookup == NULL) {
443 0 : DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
444 0 : return NULL;
445 : }
446 0 : return (*meth->globallookup) (name);
447 : }
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