]>
Commit | Line | Data |
---|---|---|
cbecb3ac | 1 | /* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */ |
ae5c8664 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 | |
ae5c8664 | 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> | |
62 | #include "cryptlib.h" | |
63 | #include <openssl/dso.h> | |
64 | ||
65 | static DSO_METHOD *default_DSO_meth = NULL; | |
66 | ||
67 | DSO *DSO_new(void) | |
ae5c8664 MC |
68 | { |
69 | return (DSO_new_method(NULL)); | |
70 | } | |
8f4fac7f GT |
71 | |
72 | void DSO_set_default_method(DSO_METHOD *meth) | |
ae5c8664 MC |
73 | { |
74 | default_DSO_meth = meth; | |
75 | } | |
8f4fac7f GT |
76 | |
77 | DSO_METHOD *DSO_get_default_method(void) | |
ae5c8664 MC |
78 | { |
79 | return (default_DSO_meth); | |
80 | } | |
8f4fac7f GT |
81 | |
82 | DSO_METHOD *DSO_get_method(DSO *dso) | |
ae5c8664 MC |
83 | { |
84 | return (dso->meth); | |
85 | } | |
8f4fac7f GT |
86 | |
87 | DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth) | |
ae5c8664 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) | |
ae5c8664 MC |
96 | { |
97 | DSO *ret; | |
98 | ||
99 | 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 | default_DSO_meth = DSO_METHOD_openssl(); | |
106 | ret = (DSO *)OPENSSL_malloc(sizeof(DSO)); | |
107 | if (ret == NULL) { | |
108 | DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
109 | return (NULL); | |
110 | } | |
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); | |
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) | |
ae5c8664 MC |
132 | { |
133 | int i; | |
134 | ||
135 | if (dso == NULL) { | |
136 | DSOerr(DSO_F_DSO_FREE, ERR_R_PASSED_NULL_PARAMETER); | |
137 | return (0); | |
138 | } | |
139 | ||
140 | i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO); | |
8f4fac7f | 141 | #ifdef REF_PRINT |
ae5c8664 | 142 | REF_PRINT("DSO", dso); |
8f4fac7f | 143 | #endif |
ae5c8664 MC |
144 | if (i > 0) |
145 | return (1); | |
8f4fac7f | 146 | #ifdef REF_CHECK |
ae5c8664 MC |
147 | if (i < 0) { |
148 | fprintf(stderr, "DSO_free, bad reference count\n"); | |
149 | abort(); | |
150 | } | |
8f4fac7f GT |
151 | #endif |
152 | ||
ae5c8664 MC |
153 | if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) { |
154 | DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED); | |
155 | return (0); | |
156 | } | |
8f4fac7f | 157 | |
ae5c8664 MC |
158 | if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) { |
159 | DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED); | |
160 | return (0); | |
161 | } | |
162 | ||
163 | sk_void_free(dso->meth_data); | |
164 | if (dso->filename != NULL) | |
165 | OPENSSL_free(dso->filename); | |
166 | if (dso->loaded_filename != NULL) | |
167 | OPENSSL_free(dso->loaded_filename); | |
8f4fac7f | 168 | |
ae5c8664 MC |
169 | OPENSSL_free(dso); |
170 | return (1); | |
171 | } | |
172 | ||
173 | int DSO_flags(DSO *dso) | |
174 | { | |
175 | return ((dso == NULL) ? 0 : dso->flags); | |
176 | } | |
8f4fac7f | 177 | |
d9ff8890 | 178 | int DSO_up_ref(DSO *dso) |
ae5c8664 MC |
179 | { |
180 | if (dso == NULL) { | |
181 | DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER); | |
182 | return (0); | |
183 | } | |
8f4fac7f | 184 | |
ae5c8664 MC |
185 | CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO); |
186 | return (1); | |
187 | } | |
8f4fac7f | 188 | |
b9e63915 | 189 | DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags) |
ae5c8664 MC |
190 | { |
191 | DSO *ret; | |
192 | int allocated = 0; | |
193 | ||
194 | if (dso == NULL) { | |
195 | ret = DSO_new_method(meth); | |
196 | if (ret == NULL) { | |
197 | DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE); | |
198 | goto err; | |
199 | } | |
200 | allocated = 1; | |
201 | /* Pass the provided flags to the new DSO object */ | |
202 | if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) { | |
203 | DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED); | |
204 | goto err; | |
205 | } | |
206 | } else | |
207 | ret = dso; | |
208 | /* Don't load if we're currently already loaded */ | |
209 | if (ret->filename != NULL) { | |
210 | DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED); | |
211 | goto err; | |
212 | } | |
213 | /* | |
214 | * filename can only be NULL if we were passed a dso that already has one | |
215 | * set. | |
216 | */ | |
217 | if (filename != NULL) | |
218 | if (!DSO_set_filename(ret, filename)) { | |
219 | DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED); | |
220 | goto err; | |
221 | } | |
222 | filename = ret->filename; | |
223 | if (filename == NULL) { | |
224 | DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME); | |
225 | goto err; | |
226 | } | |
227 | if (ret->meth->dso_load == NULL) { | |
228 | DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED); | |
229 | goto err; | |
230 | } | |
231 | if (!ret->meth->dso_load(ret)) { | |
232 | DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED); | |
233 | goto err; | |
234 | } | |
235 | /* Load succeeded */ | |
236 | return (ret); | |
237 | err: | |
238 | if (allocated) | |
239 | DSO_free(ret); | |
240 | return (NULL); | |
241 | } | |
8f4fac7f | 242 | |
e9a68cfb | 243 | void *DSO_bind_var(DSO *dso, const char *symname) |
ae5c8664 MC |
244 | { |
245 | void *ret = NULL; | |
246 | ||
247 | if ((dso == NULL) || (symname == NULL)) { | |
248 | DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER); | |
249 | return (NULL); | |
250 | } | |
251 | if (dso->meth->dso_bind_var == NULL) { | |
252 | DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED); | |
253 | return (NULL); | |
254 | } | |
255 | if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) { | |
256 | DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE); | |
257 | return (NULL); | |
258 | } | |
259 | /* Success */ | |
260 | return (ret); | |
261 | } | |
e9a68cfb GT |
262 | |
263 | DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname) | |
ae5c8664 MC |
264 | { |
265 | DSO_FUNC_TYPE ret = NULL; | |
266 | ||
267 | if ((dso == NULL) || (symname == NULL)) { | |
268 | DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
269 | return (NULL); | |
270 | } | |
271 | if (dso->meth->dso_bind_func == NULL) { | |
272 | DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED); | |
273 | return (NULL); | |
274 | } | |
275 | if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) { | |
276 | DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE); | |
277 | 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 | |
3b38646d | 288 | * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd |
ae5c8664 MC |
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 | */ | |
b9e63915 | 292 | long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg) |
ae5c8664 MC |
293 | { |
294 | if (dso == NULL) { | |
295 | DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER); | |
296 | 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 | switch (cmd) { | |
303 | case DSO_CTRL_GET_FLAGS: | |
304 | return dso->flags; | |
305 | case DSO_CTRL_SET_FLAGS: | |
306 | dso->flags = (int)larg; | |
307 | return (0); | |
308 | case DSO_CTRL_OR_FLAGS: | |
309 | dso->flags |= (int)larg; | |
310 | return (0); | |
311 | default: | |
312 | break; | |
313 | } | |
314 | if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) { | |
315 | DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED); | |
316 | return (-1); | |
317 | } | |
318 | return (dso->meth->dso_ctrl(dso, cmd, larg, parg)); | |
319 | } | |
51c8dc37 GT |
320 | |
321 | int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb, | |
ae5c8664 MC |
322 | DSO_NAME_CONVERTER_FUNC *oldcb) |
323 | { | |
324 | if (dso == NULL) { | |
325 | DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER); | |
326 | return (0); | |
327 | } | |
328 | if (oldcb) | |
329 | *oldcb = dso->name_converter; | |
330 | dso->name_converter = cb; | |
331 | return (1); | |
332 | } | |
51c8dc37 GT |
333 | |
334 | const char *DSO_get_filename(DSO *dso) | |
ae5c8664 MC |
335 | { |
336 | if (dso == NULL) { | |
337 | DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
338 | return (NULL); | |
339 | } | |
340 | return (dso->filename); | |
341 | } | |
51c8dc37 GT |
342 | |
343 | int DSO_set_filename(DSO *dso, const char *filename) | |
ae5c8664 MC |
344 | { |
345 | char *copied; | |
346 | ||
347 | if ((dso == NULL) || (filename == NULL)) { | |
348 | DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
349 | return (0); | |
350 | } | |
351 | if (dso->loaded_filename) { | |
352 | DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED); | |
353 | return (0); | |
354 | } | |
355 | /* We'll duplicate filename */ | |
356 | copied = OPENSSL_malloc(strlen(filename) + 1); | |
357 | if (copied == NULL) { | |
358 | DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE); | |
359 | return (0); | |
360 | } | |
361 | BUF_strlcpy(copied, filename, strlen(filename) + 1); | |
362 | if (dso->filename) | |
363 | OPENSSL_free(dso->filename); | |
364 | dso->filename = copied; | |
365 | return (1); | |
366 | } | |
51c8dc37 | 367 | |
cbecb3ac | 368 | char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2) |
ae5c8664 MC |
369 | { |
370 | char *result = NULL; | |
371 | ||
372 | if (dso == NULL || filespec1 == NULL) { | |
373 | DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER); | |
374 | return (NULL); | |
375 | } | |
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); | |
381 | } | |
382 | return (result); | |
383 | } | |
cbecb3ac | 384 | |
51c8dc37 | 385 | char *DSO_convert_filename(DSO *dso, const char *filename) |
ae5c8664 MC |
386 | { |
387 | char *result = NULL; | |
388 | ||
389 | if (dso == NULL) { | |
390 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
391 | return (NULL); | |
392 | } | |
393 | if (filename == NULL) | |
394 | filename = dso->filename; | |
395 | if (filename == NULL) { | |
396 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME); | |
397 | return (NULL); | |
398 | } | |
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); | |
404 | } | |
405 | if (result == NULL) { | |
406 | result = OPENSSL_malloc(strlen(filename) + 1); | |
407 | if (result == NULL) { | |
408 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE); | |
409 | return (NULL); | |
410 | } | |
411 | BUF_strlcpy(result, filename, strlen(filename) + 1); | |
412 | } | |
413 | return (result); | |
414 | } | |
51c8dc37 GT |
415 | |
416 | const char *DSO_get_loaded_filename(DSO *dso) | |
ae5c8664 MC |
417 | { |
418 | if (dso == NULL) { | |
419 | DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
420 | return (NULL); | |
421 | } | |
422 | return (dso->loaded_filename); | |
423 | } | |
424 | ||
425 | int DSO_pathbyaddr(void *addr, char *path, int sz) | |
426 | { | |
427 | DSO_METHOD *meth = default_DSO_meth; | |
428 | if (meth == NULL) | |
429 | meth = DSO_METHOD_openssl(); | |
430 | if (meth->pathbyaddr == NULL) { | |
431 | DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED); | |
432 | return -1; | |
433 | } | |
434 | return (*meth->pathbyaddr) (addr, path, sz); | |
435 | } | |
68b64fb6 | 436 | |
c6cb42e4 | 437 | void *DSO_global_lookup(const char *name) |
ae5c8664 MC |
438 | { |
439 | DSO_METHOD *meth = default_DSO_meth; | |
440 | if (meth == NULL) | |
441 | meth = DSO_METHOD_openssl(); | |
442 | if (meth->globallookup == NULL) { | |
443 | DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED); | |
444 | return NULL; | |
445 | } | |
446 | return (*meth->globallookup) (name); | |
447 | } |