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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 | ||
0f113f3e MC |
59 | /* |
60 | * We need to do this early, because stdio.h includes the header files that | |
61 | * handle _GNU_SOURCE and other similar macros. Defining it later is simply | |
62 | * too late, because those headers are protected from re- inclusion. | |
63 | */ | |
c1844095 | 64 | #ifndef _GNU_SOURCE |
0f113f3e | 65 | # define _GNU_SOURCE /* make sure dladdr is declared */ |
3ecbd099 RL |
66 | #endif |
67 | ||
8f4fac7f | 68 | #include <stdio.h> |
b39fc560 | 69 | #include "internal/cryptlib.h" |
8f4fac7f | 70 | #include <openssl/dso.h> |
e987f9f2 | 71 | #include "internal/dso_conf.h" |
8f4fac7f GT |
72 | |
73 | #ifndef DSO_DLFCN | |
74 | DSO_METHOD *DSO_METHOD_dlfcn(void) | |
0f113f3e MC |
75 | { |
76 | return NULL; | |
77 | } | |
8f4fac7f GT |
78 | #else |
79 | ||
0f113f3e MC |
80 | # ifdef HAVE_DLFCN_H |
81 | # ifdef __osf__ | |
82 | # define __EXTENSIONS__ | |
83 | # endif | |
84 | # include <dlfcn.h> | |
85 | # define HAVE_DLINFO 1 | |
86 | # if defined(_AIX) || defined(__CYGWIN__) || \ | |
73133962 | 87 | defined(__SCO_VERSION__) || defined(_SCO_ELF) || \ |
afb41913 | 88 | (defined(__osf__) && !defined(RTLD_NEXT)) || \ |
7a4ec19a | 89 | (defined(__OpenBSD__) && !defined(RTLD_SELF)) || \ |
0f113f3e MC |
90 | defined(__ANDROID__) |
91 | # undef HAVE_DLINFO | |
92 | # endif | |
73133962 | 93 | # endif |
8f4fac7f | 94 | |
b9e63915 | 95 | /* Part of the hack in "dlfcn_load" ... */ |
0f113f3e | 96 | # define DSO_MAX_TRANSLATED_SIZE 256 |
b9e63915 | 97 | |
51c8dc37 | 98 | static int dlfcn_load(DSO *dso); |
8f4fac7f | 99 | static int dlfcn_unload(DSO *dso); |
e9a68cfb GT |
100 | static void *dlfcn_bind_var(DSO *dso, const char *symname); |
101 | static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname); | |
51c8dc37 | 102 | static char *dlfcn_name_converter(DSO *dso, const char *filename); |
cbecb3ac | 103 | static char *dlfcn_merger(DSO *dso, const char *filespec1, |
0f113f3e MC |
104 | const char *filespec2); |
105 | static int dlfcn_pathbyaddr(void *addr, char *path, int sz); | |
c6cb42e4 | 106 | static void *dlfcn_globallookup(const char *name); |
8f4fac7f GT |
107 | |
108 | static DSO_METHOD dso_meth_dlfcn = { | |
0f113f3e MC |
109 | "OpenSSL 'dlfcn' shared library method", |
110 | dlfcn_load, | |
111 | dlfcn_unload, | |
112 | dlfcn_bind_var, | |
113 | dlfcn_bind_func, | |
0f113f3e MC |
114 | NULL, /* ctrl */ |
115 | dlfcn_name_converter, | |
116 | dlfcn_merger, | |
117 | NULL, /* init */ | |
118 | NULL, /* finish */ | |
119 | dlfcn_pathbyaddr, | |
120 | dlfcn_globallookup | |
121 | }; | |
8f4fac7f GT |
122 | |
123 | DSO_METHOD *DSO_METHOD_dlfcn(void) | |
0f113f3e MC |
124 | { |
125 | return (&dso_meth_dlfcn); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Prior to using the dlopen() function, we should decide on the flag we | |
130 | * send. There's a few different ways of doing this and it's a messy | |
131 | * venn-diagram to match up which platforms support what. So as we don't have | |
132 | * autoconf yet, I'm implementing a hack that could be hacked further | |
133 | * relatively easily to deal with cases as we find them. Initially this is to | |
134 | * cope with OpenBSD. | |
135 | */ | |
136 | # if defined(__OpenBSD__) || defined(__NetBSD__) | |
137 | # ifdef DL_LAZY | |
138 | # define DLOPEN_FLAG DL_LAZY | |
139 | # else | |
140 | # ifdef RTLD_NOW | |
141 | # define DLOPEN_FLAG RTLD_NOW | |
142 | # else | |
143 | # define DLOPEN_FLAG 0 | |
144 | # endif | |
145 | # endif | |
146 | # else | |
147 | # define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */ | |
148 | # endif | |
1a797ac6 | 149 | |
0f113f3e MC |
150 | /* |
151 | * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle | |
152 | * (void*) returned from dlopen(). | |
8f4fac7f GT |
153 | */ |
154 | ||
51c8dc37 | 155 | static int dlfcn_load(DSO *dso) |
0f113f3e MC |
156 | { |
157 | void *ptr = NULL; | |
158 | /* See applicable comments in dso_dl.c */ | |
159 | char *filename = DSO_convert_filename(dso, NULL); | |
160 | int flags = DLOPEN_FLAG; | |
161 | ||
162 | if (filename == NULL) { | |
163 | DSOerr(DSO_F_DLFCN_LOAD, DSO_R_NO_FILENAME); | |
164 | goto err; | |
165 | } | |
166 | # ifdef RTLD_GLOBAL | |
167 | if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS) | |
168 | flags |= RTLD_GLOBAL; | |
169 | # endif | |
170 | ptr = dlopen(filename, flags); | |
171 | if (ptr == NULL) { | |
172 | DSOerr(DSO_F_DLFCN_LOAD, DSO_R_LOAD_FAILED); | |
173 | ERR_add_error_data(4, "filename(", filename, "): ", dlerror()); | |
174 | goto err; | |
175 | } | |
176 | if (!sk_void_push(dso->meth_data, (char *)ptr)) { | |
177 | DSOerr(DSO_F_DLFCN_LOAD, DSO_R_STACK_ERROR); | |
178 | goto err; | |
179 | } | |
180 | /* Success */ | |
181 | dso->loaded_filename = filename; | |
182 | return (1); | |
183 | err: | |
184 | /* Cleanup! */ | |
b548a1f1 | 185 | OPENSSL_free(filename); |
0f113f3e MC |
186 | if (ptr != NULL) |
187 | dlclose(ptr); | |
188 | return (0); | |
51c8dc37 | 189 | } |
8f4fac7f GT |
190 | |
191 | static int dlfcn_unload(DSO *dso) | |
0f113f3e MC |
192 | { |
193 | void *ptr; | |
194 | if (dso == NULL) { | |
195 | DSOerr(DSO_F_DLFCN_UNLOAD, ERR_R_PASSED_NULL_PARAMETER); | |
196 | return (0); | |
197 | } | |
198 | if (sk_void_num(dso->meth_data) < 1) | |
199 | return (1); | |
200 | ptr = sk_void_pop(dso->meth_data); | |
201 | if (ptr == NULL) { | |
202 | DSOerr(DSO_F_DLFCN_UNLOAD, DSO_R_NULL_HANDLE); | |
203 | /* | |
204 | * Should push the value back onto the stack in case of a retry. | |
205 | */ | |
206 | sk_void_push(dso->meth_data, ptr); | |
207 | return (0); | |
208 | } | |
209 | /* For now I'm not aware of any errors associated with dlclose() */ | |
210 | dlclose(ptr); | |
211 | return (1); | |
212 | } | |
8f4fac7f | 213 | |
e9a68cfb | 214 | static void *dlfcn_bind_var(DSO *dso, const char *symname) |
0f113f3e MC |
215 | { |
216 | void *ptr, *sym; | |
217 | ||
218 | if ((dso == NULL) || (symname == NULL)) { | |
219 | DSOerr(DSO_F_DLFCN_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER); | |
220 | return (NULL); | |
221 | } | |
222 | if (sk_void_num(dso->meth_data) < 1) { | |
223 | DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_STACK_ERROR); | |
224 | return (NULL); | |
225 | } | |
226 | ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); | |
227 | if (ptr == NULL) { | |
228 | DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_NULL_HANDLE); | |
229 | return (NULL); | |
230 | } | |
231 | sym = dlsym(ptr, symname); | |
232 | if (sym == NULL) { | |
233 | DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_SYM_FAILURE); | |
234 | ERR_add_error_data(4, "symname(", symname, "): ", dlerror()); | |
235 | return (NULL); | |
236 | } | |
237 | return (sym); | |
238 | } | |
e9a68cfb GT |
239 | |
240 | static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname) | |
0f113f3e MC |
241 | { |
242 | void *ptr; | |
243 | union { | |
244 | DSO_FUNC_TYPE sym; | |
245 | void *dlret; | |
246 | } u; | |
247 | ||
248 | if ((dso == NULL) || (symname == NULL)) { | |
249 | DSOerr(DSO_F_DLFCN_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
250 | return (NULL); | |
251 | } | |
252 | if (sk_void_num(dso->meth_data) < 1) { | |
253 | DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_STACK_ERROR); | |
254 | return (NULL); | |
255 | } | |
256 | ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); | |
257 | if (ptr == NULL) { | |
258 | DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_NULL_HANDLE); | |
259 | return (NULL); | |
260 | } | |
261 | u.dlret = dlsym(ptr, symname); | |
262 | if (u.dlret == NULL) { | |
263 | DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_SYM_FAILURE); | |
264 | ERR_add_error_data(4, "symname(", symname, "): ", dlerror()); | |
265 | return (NULL); | |
266 | } | |
267 | return u.sym; | |
268 | } | |
8f4fac7f | 269 | |
cbecb3ac | 270 | static char *dlfcn_merger(DSO *dso, const char *filespec1, |
0f113f3e MC |
271 | const char *filespec2) |
272 | { | |
273 | char *merged; | |
274 | ||
275 | if (!filespec1 && !filespec2) { | |
276 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_PASSED_NULL_PARAMETER); | |
277 | return (NULL); | |
278 | } | |
279 | /* | |
280 | * If the first file specification is a rooted path, it rules. same goes | |
281 | * if the second file specification is missing. | |
282 | */ | |
283 | if (!filespec2 || (filespec1 != NULL && filespec1[0] == '/')) { | |
a89c9a0d | 284 | merged = OPENSSL_strdup(filespec1); |
90945fa3 | 285 | if (merged == NULL) { |
0f113f3e MC |
286 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); |
287 | return (NULL); | |
288 | } | |
0f113f3e MC |
289 | } |
290 | /* | |
291 | * If the first file specification is missing, the second one rules. | |
292 | */ | |
293 | else if (!filespec1) { | |
a89c9a0d | 294 | merged = OPENSSL_strdup(filespec2); |
90945fa3 | 295 | if (merged == NULL) { |
0f113f3e MC |
296 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); |
297 | return (NULL); | |
298 | } | |
b7573c59 | 299 | } else { |
0f113f3e MC |
300 | /* |
301 | * This part isn't as trivial as it looks. It assumes that the | |
302 | * second file specification really is a directory, and makes no | |
303 | * checks whatsoever. Therefore, the result becomes the | |
304 | * concatenation of filespec2 followed by a slash followed by | |
305 | * filespec1. | |
306 | */ | |
0f113f3e MC |
307 | int spec2len, len; |
308 | ||
309 | spec2len = strlen(filespec2); | |
b7573c59 | 310 | len = spec2len + strlen(filespec1); |
0f113f3e | 311 | |
b7573c59 | 312 | if (spec2len && filespec2[spec2len - 1] == '/') { |
0f113f3e MC |
313 | spec2len--; |
314 | len--; | |
315 | } | |
316 | merged = OPENSSL_malloc(len + 2); | |
90945fa3 | 317 | if (merged == NULL) { |
0f113f3e MC |
318 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); |
319 | return (NULL); | |
320 | } | |
321 | strcpy(merged, filespec2); | |
322 | merged[spec2len] = '/'; | |
323 | strcpy(&merged[spec2len + 1], filespec1); | |
324 | } | |
325 | return (merged); | |
326 | } | |
4a620922 | 327 | |
51c8dc37 | 328 | static char *dlfcn_name_converter(DSO *dso, const char *filename) |
0f113f3e MC |
329 | { |
330 | char *translated; | |
331 | int len, rsize, transform; | |
332 | ||
333 | len = strlen(filename); | |
334 | rsize = len + 1; | |
335 | transform = (strstr(filename, "/") == NULL); | |
336 | if (transform) { | |
337 | /* We will convert this to "%s.so" or "lib%s.so" etc */ | |
e987f9f2 | 338 | rsize += strlen(DSO_EXTENSION); /* The length of ".so" */ |
0f113f3e MC |
339 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) |
340 | rsize += 3; /* The length of "lib" */ | |
341 | } | |
342 | translated = OPENSSL_malloc(rsize); | |
343 | if (translated == NULL) { | |
344 | DSOerr(DSO_F_DLFCN_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED); | |
345 | return (NULL); | |
346 | } | |
347 | if (transform) { | |
348 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) | |
e987f9f2 | 349 | sprintf(translated, "lib%s" DSO_EXTENSION, filename); |
0f113f3e | 350 | else |
e987f9f2 | 351 | sprintf(translated, "%s" DSO_EXTENSION, filename); |
0f113f3e MC |
352 | } else |
353 | sprintf(translated, "%s", filename); | |
354 | return (translated); | |
355 | } | |
356 | ||
357 | # ifdef __sgi | |
23a22b4c | 358 | /*- |
7ed87653 AP |
359 | This is a quote from IRIX manual for dladdr(3c): |
360 | ||
361 | <dlfcn.h> does not contain a prototype for dladdr or definition of | |
362 | Dl_info. The #include <dlfcn.h> in the SYNOPSIS line is traditional, | |
363 | but contains no dladdr prototype and no IRIX library contains an | |
364 | implementation. Write your own declaration based on the code below. | |
365 | ||
366 | The following code is dependent on internal interfaces that are not | |
367 | part of the IRIX compatibility guarantee; however, there is no future | |
368 | intention to change this interface, so on a practical level, the code | |
369 | below is safe to use on IRIX. | |
c8e1edaa | 370 | */ |
0f113f3e MC |
371 | # include <rld_interface.h> |
372 | # ifndef _RLD_INTERFACE_DLFCN_H_DLADDR | |
373 | # define _RLD_INTERFACE_DLFCN_H_DLADDR | |
7ed87653 | 374 | typedef struct Dl_info { |
0f113f3e MC |
375 | const char *dli_fname; |
376 | void *dli_fbase; | |
377 | const char *dli_sname; | |
378 | void *dli_saddr; | |
379 | int dli_version; | |
380 | int dli_reserved1; | |
381 | long dli_reserved[4]; | |
7ed87653 | 382 | } Dl_info; |
0f113f3e | 383 | # else |
7ed87653 | 384 | typedef struct Dl_info Dl_info; |
0f113f3e MC |
385 | # endif |
386 | # define _RLD_DLADDR 14 | |
7ed87653 AP |
387 | |
388 | static int dladdr(void *address, Dl_info *dl) | |
389 | { | |
0f113f3e MC |
390 | void *v; |
391 | v = _rld_new_interface(_RLD_DLADDR, address, dl); | |
392 | return (int)v; | |
393 | } | |
394 | # endif /* __sgi */ | |
395 | ||
396 | static int dlfcn_pathbyaddr(void *addr, char *path, int sz) | |
397 | { | |
398 | # ifdef HAVE_DLINFO | |
399 | Dl_info dli; | |
400 | int len; | |
401 | ||
402 | if (addr == NULL) { | |
403 | union { | |
404 | int (*f) (void *, char *, int); | |
405 | void *p; | |
406 | } t = { | |
407 | dlfcn_pathbyaddr | |
408 | }; | |
409 | addr = t.p; | |
410 | } | |
411 | ||
412 | if (dladdr(addr, &dli)) { | |
413 | len = (int)strlen(dli.dli_fname); | |
414 | if (sz <= 0) | |
415 | return len + 1; | |
416 | if (len >= sz) | |
417 | len = sz - 1; | |
418 | memcpy(path, dli.dli_fname, len); | |
419 | path[len++] = 0; | |
420 | return len; | |
421 | } | |
422 | ||
423 | ERR_add_error_data(2, "dlfcn_pathbyaddr(): ", dlerror()); | |
424 | # endif | |
425 | return -1; | |
7ed87653 | 426 | } |
68b64fb6 | 427 | |
c6cb42e4 | 428 | static void *dlfcn_globallookup(const char *name) |
0f113f3e MC |
429 | { |
430 | void *ret = NULL, *handle = dlopen(NULL, RTLD_LAZY); | |
431 | ||
432 | if (handle) { | |
433 | ret = dlsym(handle, name); | |
434 | dlclose(handle); | |
435 | } | |
436 | ||
437 | return ret; | |
438 | } | |
439 | #endif /* DSO_DLFCN */ |