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31384753 | 1 | /* dso_lib.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project | |
4 | * 2000. | |
8f4fac7f GT |
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 | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
8f4fac7f GT |
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> | |
b39fc560 | 62 | #include "internal/cryptlib.h" |
8f4fac7f GT |
63 | #include <openssl/dso.h> |
64 | ||
65 | static DSO_METHOD *default_DSO_meth = NULL; | |
66 | ||
67 | DSO *DSO_new(void) | |
0f113f3e MC |
68 | { |
69 | return (DSO_new_method(NULL)); | |
70 | } | |
8f4fac7f GT |
71 | |
72 | void DSO_set_default_method(DSO_METHOD *meth) | |
0f113f3e MC |
73 | { |
74 | default_DSO_meth = meth; | |
75 | } | |
8f4fac7f GT |
76 | |
77 | DSO_METHOD *DSO_get_default_method(void) | |
0f113f3e MC |
78 | { |
79 | return (default_DSO_meth); | |
80 | } | |
8f4fac7f GT |
81 | |
82 | DSO_METHOD *DSO_get_method(DSO *dso) | |
0f113f3e MC |
83 | { |
84 | return (dso->meth); | |
85 | } | |
8f4fac7f GT |
86 | |
87 | DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth) | |
0f113f3e MC |
88 | { |
89 | DSO_METHOD *mtmp; | |
90 | mtmp = dso->meth; | |
91 | dso->meth = meth; | |
92 | return (mtmp); | |
93 | } | |
8f4fac7f GT |
94 | |
95 | DSO *DSO_new_method(DSO_METHOD *meth) | |
0f113f3e MC |
96 | { |
97 | DSO *ret; | |
98 | ||
b196e7d9 | 99 | if (default_DSO_meth == NULL) { |
0f113f3e MC |
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 | default_DSO_meth = DSO_METHOD_openssl(); | |
b196e7d9 | 106 | } |
b51bce94 | 107 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
108 | if (ret == NULL) { |
109 | DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
110 | return (NULL); | |
111 | } | |
0f113f3e MC |
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); | |
116 | OPENSSL_free(ret); | |
117 | return (NULL); | |
118 | } | |
119 | if (meth == NULL) | |
120 | ret->meth = default_DSO_meth; | |
121 | else | |
122 | ret->meth = meth; | |
123 | ret->references = 1; | |
124 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { | |
125 | OPENSSL_free(ret); | |
126 | ret = NULL; | |
127 | } | |
128 | return (ret); | |
129 | } | |
8f4fac7f GT |
130 | |
131 | int DSO_free(DSO *dso) | |
0f113f3e MC |
132 | { |
133 | int i; | |
134 | ||
efa7dd64 RS |
135 | if (dso == NULL) |
136 | return (1); | |
0f113f3e MC |
137 | |
138 | i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO); | |
8f4fac7f | 139 | #ifdef REF_PRINT |
0f113f3e | 140 | REF_PRINT("DSO", dso); |
8f4fac7f | 141 | #endif |
0f113f3e MC |
142 | if (i > 0) |
143 | return (1); | |
8f4fac7f | 144 | #ifdef REF_CHECK |
0f113f3e MC |
145 | if (i < 0) { |
146 | fprintf(stderr, "DSO_free, bad reference count\n"); | |
147 | abort(); | |
148 | } | |
8f4fac7f GT |
149 | #endif |
150 | ||
0f113f3e MC |
151 | if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) { |
152 | DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED); | |
153 | return (0); | |
154 | } | |
8f4fac7f | 155 | |
0f113f3e MC |
156 | if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) { |
157 | DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED); | |
158 | return (0); | |
159 | } | |
160 | ||
161 | sk_void_free(dso->meth_data); | |
b548a1f1 RS |
162 | OPENSSL_free(dso->filename); |
163 | OPENSSL_free(dso->loaded_filename); | |
0f113f3e MC |
164 | OPENSSL_free(dso); |
165 | return (1); | |
166 | } | |
167 | ||
168 | int DSO_flags(DSO *dso) | |
169 | { | |
170 | return ((dso == NULL) ? 0 : dso->flags); | |
171 | } | |
8f4fac7f | 172 | |
d9ff8890 | 173 | int DSO_up_ref(DSO *dso) |
0f113f3e MC |
174 | { |
175 | if (dso == NULL) { | |
176 | DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER); | |
177 | return (0); | |
178 | } | |
8f4fac7f | 179 | |
0f113f3e MC |
180 | CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO); |
181 | return (1); | |
182 | } | |
8f4fac7f | 183 | |
b9e63915 | 184 | DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags) |
0f113f3e MC |
185 | { |
186 | DSO *ret; | |
187 | int allocated = 0; | |
188 | ||
189 | if (dso == NULL) { | |
190 | ret = DSO_new_method(meth); | |
191 | if (ret == NULL) { | |
192 | DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE); | |
193 | goto err; | |
194 | } | |
195 | allocated = 1; | |
196 | /* Pass the provided flags to the new DSO object */ | |
197 | if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) { | |
198 | DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED); | |
199 | goto err; | |
200 | } | |
201 | } else | |
202 | ret = dso; | |
203 | /* Don't load if we're currently already loaded */ | |
204 | if (ret->filename != NULL) { | |
205 | DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED); | |
206 | goto err; | |
207 | } | |
208 | /* | |
209 | * filename can only be NULL if we were passed a dso that already has one | |
210 | * set. | |
211 | */ | |
212 | if (filename != NULL) | |
213 | if (!DSO_set_filename(ret, filename)) { | |
214 | DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED); | |
215 | goto err; | |
216 | } | |
217 | filename = ret->filename; | |
218 | if (filename == NULL) { | |
219 | DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME); | |
220 | goto err; | |
221 | } | |
222 | if (ret->meth->dso_load == NULL) { | |
223 | DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED); | |
224 | goto err; | |
225 | } | |
226 | if (!ret->meth->dso_load(ret)) { | |
227 | DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED); | |
228 | goto err; | |
229 | } | |
230 | /* Load succeeded */ | |
231 | return (ret); | |
232 | err: | |
233 | if (allocated) | |
234 | DSO_free(ret); | |
235 | return (NULL); | |
236 | } | |
8f4fac7f | 237 | |
e9a68cfb | 238 | void *DSO_bind_var(DSO *dso, const char *symname) |
0f113f3e MC |
239 | { |
240 | void *ret = NULL; | |
241 | ||
242 | if ((dso == NULL) || (symname == NULL)) { | |
243 | DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER); | |
244 | return (NULL); | |
245 | } | |
246 | if (dso->meth->dso_bind_var == NULL) { | |
247 | DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED); | |
248 | return (NULL); | |
249 | } | |
250 | if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) { | |
251 | DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE); | |
252 | return (NULL); | |
253 | } | |
254 | /* Success */ | |
255 | return (ret); | |
256 | } | |
e9a68cfb GT |
257 | |
258 | DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname) | |
0f113f3e MC |
259 | { |
260 | DSO_FUNC_TYPE ret = NULL; | |
261 | ||
262 | if ((dso == NULL) || (symname == NULL)) { | |
263 | DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
264 | return (NULL); | |
265 | } | |
266 | if (dso->meth->dso_bind_func == NULL) { | |
267 | DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED); | |
268 | return (NULL); | |
269 | } | |
270 | if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) { | |
271 | DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE); | |
272 | return (NULL); | |
273 | } | |
274 | /* Success */ | |
275 | return (ret); | |
276 | } | |
277 | ||
278 | /* | |
279 | * I don't really like these *_ctrl functions very much to be perfectly | |
280 | * honest. For one thing, I think I have to return a negative value for any | |
281 | * error because possible DSO_ctrl() commands may return values such as | |
282 | * "size"s that can legitimately be zero (making the standard | |
61986d32 | 283 | * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd |
0f113f3e MC |
284 | * times. I'd prefer "output" values to be passed by reference and the return |
285 | * value as success/failure like usual ... but we conform when we must... :-) | |
286 | */ | |
b9e63915 | 287 | long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg) |
0f113f3e MC |
288 | { |
289 | if (dso == NULL) { | |
290 | DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER); | |
291 | return (-1); | |
292 | } | |
293 | /* | |
294 | * We should intercept certain generic commands and only pass control to | |
295 | * the method-specific ctrl() function if it's something we don't handle. | |
296 | */ | |
297 | switch (cmd) { | |
298 | case DSO_CTRL_GET_FLAGS: | |
299 | return dso->flags; | |
300 | case DSO_CTRL_SET_FLAGS: | |
301 | dso->flags = (int)larg; | |
302 | return (0); | |
303 | case DSO_CTRL_OR_FLAGS: | |
304 | dso->flags |= (int)larg; | |
305 | return (0); | |
306 | default: | |
307 | break; | |
308 | } | |
309 | if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) { | |
310 | DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED); | |
311 | return (-1); | |
312 | } | |
313 | return (dso->meth->dso_ctrl(dso, cmd, larg, parg)); | |
314 | } | |
51c8dc37 GT |
315 | |
316 | int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb, | |
0f113f3e MC |
317 | DSO_NAME_CONVERTER_FUNC *oldcb) |
318 | { | |
319 | if (dso == NULL) { | |
320 | DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER); | |
321 | return (0); | |
322 | } | |
323 | if (oldcb) | |
324 | *oldcb = dso->name_converter; | |
325 | dso->name_converter = cb; | |
326 | return (1); | |
327 | } | |
51c8dc37 GT |
328 | |
329 | const char *DSO_get_filename(DSO *dso) | |
0f113f3e MC |
330 | { |
331 | if (dso == NULL) { | |
332 | DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
333 | return (NULL); | |
334 | } | |
335 | return (dso->filename); | |
336 | } | |
51c8dc37 GT |
337 | |
338 | int DSO_set_filename(DSO *dso, const char *filename) | |
0f113f3e MC |
339 | { |
340 | char *copied; | |
341 | ||
342 | if ((dso == NULL) || (filename == NULL)) { | |
343 | DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
344 | return (0); | |
345 | } | |
346 | if (dso->loaded_filename) { | |
347 | DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED); | |
348 | return (0); | |
349 | } | |
350 | /* We'll duplicate filename */ | |
351 | copied = OPENSSL_malloc(strlen(filename) + 1); | |
352 | if (copied == NULL) { | |
353 | DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE); | |
354 | return (0); | |
355 | } | |
7644a9ae | 356 | OPENSSL_strlcpy(copied, filename, strlen(filename) + 1); |
b548a1f1 | 357 | OPENSSL_free(dso->filename); |
0f113f3e MC |
358 | dso->filename = copied; |
359 | return (1); | |
360 | } | |
51c8dc37 | 361 | |
cbecb3ac | 362 | char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2) |
0f113f3e MC |
363 | { |
364 | char *result = NULL; | |
365 | ||
366 | if (dso == NULL || filespec1 == NULL) { | |
367 | DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER); | |
368 | return (NULL); | |
369 | } | |
370 | if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) { | |
371 | if (dso->merger != NULL) | |
372 | result = dso->merger(dso, filespec1, filespec2); | |
373 | else if (dso->meth->dso_merger != NULL) | |
374 | result = dso->meth->dso_merger(dso, filespec1, filespec2); | |
375 | } | |
376 | return (result); | |
377 | } | |
cbecb3ac | 378 | |
51c8dc37 | 379 | char *DSO_convert_filename(DSO *dso, const char *filename) |
0f113f3e MC |
380 | { |
381 | char *result = NULL; | |
382 | ||
383 | if (dso == NULL) { | |
384 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
385 | return (NULL); | |
386 | } | |
387 | if (filename == NULL) | |
388 | filename = dso->filename; | |
389 | if (filename == NULL) { | |
390 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME); | |
391 | return (NULL); | |
392 | } | |
393 | if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) { | |
394 | if (dso->name_converter != NULL) | |
395 | result = dso->name_converter(dso, filename); | |
396 | else if (dso->meth->dso_name_converter != NULL) | |
397 | result = dso->meth->dso_name_converter(dso, filename); | |
398 | } | |
399 | if (result == NULL) { | |
400 | result = OPENSSL_malloc(strlen(filename) + 1); | |
401 | if (result == NULL) { | |
402 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE); | |
403 | return (NULL); | |
404 | } | |
7644a9ae | 405 | OPENSSL_strlcpy(result, filename, strlen(filename) + 1); |
0f113f3e MC |
406 | } |
407 | return (result); | |
408 | } | |
51c8dc37 GT |
409 | |
410 | const char *DSO_get_loaded_filename(DSO *dso) | |
0f113f3e MC |
411 | { |
412 | if (dso == NULL) { | |
413 | DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
414 | return (NULL); | |
415 | } | |
416 | return (dso->loaded_filename); | |
417 | } | |
418 | ||
419 | int DSO_pathbyaddr(void *addr, char *path, int sz) | |
420 | { | |
421 | DSO_METHOD *meth = default_DSO_meth; | |
422 | if (meth == NULL) | |
423 | meth = DSO_METHOD_openssl(); | |
424 | if (meth->pathbyaddr == NULL) { | |
425 | DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED); | |
426 | return -1; | |
427 | } | |
428 | return (*meth->pathbyaddr) (addr, path, sz); | |
429 | } | |
68b64fb6 | 430 | |
c6cb42e4 | 431 | void *DSO_global_lookup(const char *name) |
0f113f3e MC |
432 | { |
433 | DSO_METHOD *meth = default_DSO_meth; | |
434 | if (meth == NULL) | |
435 | meth = DSO_METHOD_openssl(); | |
436 | if (meth->globallookup == NULL) { | |
437 | DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED); | |
438 | return NULL; | |
439 | } | |
440 | return (*meth->globallookup) (name); | |
441 | } |