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0f113f3e MC |
1 | /* |
2 | * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project | |
3 | * 2000. | |
8f4fac7f GT |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
8f4fac7f GT |
14 | * |
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 | |
18 | * distribution. | |
19 | * | |
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/)" | |
24 | * | |
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. | |
29 | * | |
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. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
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) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
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). | |
56 | * | |
57 | */ | |
58 | ||
73decf59 | 59 | #include "dso_locl.h" |
8f4fac7f GT |
60 | |
61 | static DSO_METHOD *default_DSO_meth = NULL; | |
62 | ||
3d8b2ec4 | 63 | static DSO *DSO_new_method(DSO_METHOD *meth) |
0f113f3e MC |
64 | { |
65 | DSO *ret; | |
66 | ||
b196e7d9 | 67 | if (default_DSO_meth == NULL) { |
0f113f3e MC |
68 | /* |
69 | * We default to DSO_METH_openssl() which in turn defaults to | |
70 | * stealing the "best available" method. Will fallback to | |
71 | * DSO_METH_null() in the worst case. | |
72 | */ | |
73 | default_DSO_meth = DSO_METHOD_openssl(); | |
b196e7d9 | 74 | } |
b51bce94 | 75 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
76 | if (ret == NULL) { |
77 | DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
78 | return (NULL); | |
79 | } | |
0f113f3e MC |
80 | ret->meth_data = sk_void_new_null(); |
81 | if (ret->meth_data == NULL) { | |
82 | /* sk_new doesn't generate any errors so we do */ | |
83 | DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
84 | OPENSSL_free(ret); | |
85 | return (NULL); | |
86 | } | |
3d8b2ec4 | 87 | ret->meth = default_DSO_meth; |
0f113f3e | 88 | ret->references = 1; |
c74471d2 AG |
89 | ret->lock = CRYPTO_THREAD_lock_new(); |
90 | if (ret->lock == NULL) { | |
98637bd3 | 91 | sk_void_free(ret->meth_data); |
0f113f3e | 92 | OPENSSL_free(ret); |
c74471d2 AG |
93 | return NULL; |
94 | } | |
95 | ||
96 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { | |
97 | DSO_free(ret); | |
0f113f3e MC |
98 | ret = NULL; |
99 | } | |
c74471d2 AG |
100 | |
101 | return ret; | |
0f113f3e | 102 | } |
8f4fac7f | 103 | |
3d8b2ec4 RS |
104 | DSO *DSO_new(void) |
105 | { | |
106 | return DSO_new_method(NULL); | |
107 | } | |
108 | ||
8f4fac7f | 109 | int DSO_free(DSO *dso) |
0f113f3e MC |
110 | { |
111 | int i; | |
112 | ||
efa7dd64 RS |
113 | if (dso == NULL) |
114 | return (1); | |
0f113f3e | 115 | |
c74471d2 AG |
116 | if (CRYPTO_atomic_add(&dso->references, -1, &i, dso->lock) <= 0) |
117 | return 0; | |
118 | ||
f3f1cf84 | 119 | REF_PRINT_COUNT("DSO", dso); |
0f113f3e | 120 | if (i > 0) |
c74471d2 | 121 | return 1; |
f3f1cf84 | 122 | REF_ASSERT_ISNT(i < 0); |
8f4fac7f | 123 | |
0f113f3e MC |
124 | if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) { |
125 | DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED); | |
c74471d2 | 126 | return 0; |
0f113f3e | 127 | } |
8f4fac7f | 128 | |
0f113f3e MC |
129 | if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) { |
130 | DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED); | |
c74471d2 | 131 | return 0; |
0f113f3e MC |
132 | } |
133 | ||
134 | sk_void_free(dso->meth_data); | |
b548a1f1 RS |
135 | OPENSSL_free(dso->filename); |
136 | OPENSSL_free(dso->loaded_filename); | |
c74471d2 | 137 | CRYPTO_THREAD_lock_free(dso->lock); |
0f113f3e | 138 | OPENSSL_free(dso); |
c74471d2 | 139 | return 1; |
0f113f3e MC |
140 | } |
141 | ||
142 | int DSO_flags(DSO *dso) | |
143 | { | |
144 | return ((dso == NULL) ? 0 : dso->flags); | |
145 | } | |
8f4fac7f | 146 | |
d9ff8890 | 147 | int DSO_up_ref(DSO *dso) |
0f113f3e | 148 | { |
c74471d2 AG |
149 | int i; |
150 | ||
0f113f3e MC |
151 | if (dso == NULL) { |
152 | DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER); | |
c74471d2 | 153 | return 0; |
0f113f3e | 154 | } |
8f4fac7f | 155 | |
c74471d2 AG |
156 | if (CRYPTO_atomic_add(&dso->references, 1, &i, dso->lock) <= 0) |
157 | return 0; | |
158 | ||
159 | REF_PRINT_COUNT("DSO", r); | |
160 | REF_ASSERT_ISNT(i < 2); | |
161 | return ((i > 1) ? 1 : 0); | |
0f113f3e | 162 | } |
8f4fac7f | 163 | |
b9e63915 | 164 | DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags) |
0f113f3e MC |
165 | { |
166 | DSO *ret; | |
167 | int allocated = 0; | |
168 | ||
169 | if (dso == NULL) { | |
170 | ret = DSO_new_method(meth); | |
171 | if (ret == NULL) { | |
172 | DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE); | |
173 | goto err; | |
174 | } | |
175 | allocated = 1; | |
176 | /* Pass the provided flags to the new DSO object */ | |
177 | if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) { | |
178 | DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED); | |
179 | goto err; | |
180 | } | |
181 | } else | |
182 | ret = dso; | |
183 | /* Don't load if we're currently already loaded */ | |
184 | if (ret->filename != NULL) { | |
185 | DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED); | |
186 | goto err; | |
187 | } | |
188 | /* | |
189 | * filename can only be NULL if we were passed a dso that already has one | |
190 | * set. | |
191 | */ | |
192 | if (filename != NULL) | |
193 | if (!DSO_set_filename(ret, filename)) { | |
194 | DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED); | |
195 | goto err; | |
196 | } | |
197 | filename = ret->filename; | |
198 | if (filename == NULL) { | |
199 | DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME); | |
200 | goto err; | |
201 | } | |
202 | if (ret->meth->dso_load == NULL) { | |
203 | DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED); | |
204 | goto err; | |
205 | } | |
206 | if (!ret->meth->dso_load(ret)) { | |
207 | DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED); | |
208 | goto err; | |
209 | } | |
210 | /* Load succeeded */ | |
211 | return (ret); | |
212 | err: | |
213 | if (allocated) | |
214 | DSO_free(ret); | |
215 | return (NULL); | |
216 | } | |
8f4fac7f | 217 | |
e9a68cfb | 218 | DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname) |
0f113f3e MC |
219 | { |
220 | DSO_FUNC_TYPE ret = NULL; | |
221 | ||
222 | if ((dso == NULL) || (symname == NULL)) { | |
223 | DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
224 | return (NULL); | |
225 | } | |
226 | if (dso->meth->dso_bind_func == NULL) { | |
227 | DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED); | |
228 | return (NULL); | |
229 | } | |
230 | if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) { | |
231 | DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE); | |
232 | return (NULL); | |
233 | } | |
234 | /* Success */ | |
235 | return (ret); | |
236 | } | |
237 | ||
238 | /* | |
239 | * I don't really like these *_ctrl functions very much to be perfectly | |
240 | * honest. For one thing, I think I have to return a negative value for any | |
241 | * error because possible DSO_ctrl() commands may return values such as | |
242 | * "size"s that can legitimately be zero (making the standard | |
61986d32 | 243 | * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd |
0f113f3e MC |
244 | * times. I'd prefer "output" values to be passed by reference and the return |
245 | * value as success/failure like usual ... but we conform when we must... :-) | |
246 | */ | |
b9e63915 | 247 | long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg) |
0f113f3e MC |
248 | { |
249 | if (dso == NULL) { | |
250 | DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER); | |
251 | return (-1); | |
252 | } | |
253 | /* | |
254 | * We should intercept certain generic commands and only pass control to | |
255 | * the method-specific ctrl() function if it's something we don't handle. | |
256 | */ | |
257 | switch (cmd) { | |
258 | case DSO_CTRL_GET_FLAGS: | |
259 | return dso->flags; | |
260 | case DSO_CTRL_SET_FLAGS: | |
261 | dso->flags = (int)larg; | |
262 | return (0); | |
263 | case DSO_CTRL_OR_FLAGS: | |
264 | dso->flags |= (int)larg; | |
265 | return (0); | |
266 | default: | |
267 | break; | |
268 | } | |
269 | if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) { | |
270 | DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED); | |
271 | return (-1); | |
272 | } | |
273 | return (dso->meth->dso_ctrl(dso, cmd, larg, parg)); | |
274 | } | |
51c8dc37 | 275 | |
51c8dc37 | 276 | const char *DSO_get_filename(DSO *dso) |
0f113f3e MC |
277 | { |
278 | if (dso == NULL) { | |
279 | DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
280 | return (NULL); | |
281 | } | |
282 | return (dso->filename); | |
283 | } | |
51c8dc37 GT |
284 | |
285 | int DSO_set_filename(DSO *dso, const char *filename) | |
0f113f3e MC |
286 | { |
287 | char *copied; | |
288 | ||
289 | if ((dso == NULL) || (filename == NULL)) { | |
290 | DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
291 | return (0); | |
292 | } | |
293 | if (dso->loaded_filename) { | |
294 | DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED); | |
295 | return (0); | |
296 | } | |
297 | /* We'll duplicate filename */ | |
edae9834 | 298 | copied = OPENSSL_strdup(filename); |
0f113f3e MC |
299 | if (copied == NULL) { |
300 | DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE); | |
301 | return (0); | |
302 | } | |
b548a1f1 | 303 | OPENSSL_free(dso->filename); |
0f113f3e MC |
304 | dso->filename = copied; |
305 | return (1); | |
306 | } | |
51c8dc37 | 307 | |
cbecb3ac | 308 | char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2) |
0f113f3e MC |
309 | { |
310 | char *result = NULL; | |
311 | ||
312 | if (dso == NULL || filespec1 == NULL) { | |
313 | DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER); | |
314 | return (NULL); | |
315 | } | |
316 | if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) { | |
317 | if (dso->merger != NULL) | |
318 | result = dso->merger(dso, filespec1, filespec2); | |
319 | else if (dso->meth->dso_merger != NULL) | |
320 | result = dso->meth->dso_merger(dso, filespec1, filespec2); | |
321 | } | |
322 | return (result); | |
323 | } | |
cbecb3ac | 324 | |
51c8dc37 | 325 | char *DSO_convert_filename(DSO *dso, const char *filename) |
0f113f3e MC |
326 | { |
327 | char *result = NULL; | |
328 | ||
329 | if (dso == NULL) { | |
330 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER); | |
331 | return (NULL); | |
332 | } | |
333 | if (filename == NULL) | |
334 | filename = dso->filename; | |
335 | if (filename == NULL) { | |
336 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME); | |
337 | return (NULL); | |
338 | } | |
339 | if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) { | |
340 | if (dso->name_converter != NULL) | |
341 | result = dso->name_converter(dso, filename); | |
342 | else if (dso->meth->dso_name_converter != NULL) | |
343 | result = dso->meth->dso_name_converter(dso, filename); | |
344 | } | |
345 | if (result == NULL) { | |
edae9834 | 346 | result = OPENSSL_strdup(filename); |
0f113f3e MC |
347 | if (result == NULL) { |
348 | DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE); | |
349 | return (NULL); | |
350 | } | |
0f113f3e MC |
351 | } |
352 | return (result); | |
353 | } | |
51c8dc37 | 354 | |
c6cb42e4 | 355 | void *DSO_global_lookup(const char *name) |
0f113f3e MC |
356 | { |
357 | DSO_METHOD *meth = default_DSO_meth; | |
358 | if (meth == NULL) | |
359 | meth = DSO_METHOD_openssl(); | |
360 | if (meth->globallookup == NULL) { | |
361 | DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED); | |
362 | return NULL; | |
363 | } | |
364 | return (*meth->globallookup) (name); | |
365 | } |