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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 | ||
73decf59 | 68 | #include "dso_locl.h" |
8f4fac7f | 69 | |
38186bfd | 70 | #ifdef DSO_DLFCN |
8f4fac7f | 71 | |
0f113f3e MC |
72 | # ifdef HAVE_DLFCN_H |
73 | # ifdef __osf__ | |
74 | # define __EXTENSIONS__ | |
75 | # endif | |
76 | # include <dlfcn.h> | |
77 | # define HAVE_DLINFO 1 | |
78 | # if defined(_AIX) || defined(__CYGWIN__) || \ | |
73133962 | 79 | defined(__SCO_VERSION__) || defined(_SCO_ELF) || \ |
afb41913 | 80 | (defined(__osf__) && !defined(RTLD_NEXT)) || \ |
7a4ec19a | 81 | (defined(__OpenBSD__) && !defined(RTLD_SELF)) || \ |
0f113f3e MC |
82 | defined(__ANDROID__) |
83 | # undef HAVE_DLINFO | |
84 | # endif | |
73133962 | 85 | # endif |
8f4fac7f | 86 | |
b9e63915 | 87 | /* Part of the hack in "dlfcn_load" ... */ |
0f113f3e | 88 | # define DSO_MAX_TRANSLATED_SIZE 256 |
b9e63915 | 89 | |
51c8dc37 | 90 | static int dlfcn_load(DSO *dso); |
8f4fac7f | 91 | static int dlfcn_unload(DSO *dso); |
e9a68cfb | 92 | static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname); |
51c8dc37 | 93 | static char *dlfcn_name_converter(DSO *dso, const char *filename); |
cbecb3ac | 94 | static char *dlfcn_merger(DSO *dso, const char *filespec1, |
0f113f3e | 95 | const char *filespec2); |
c6cb42e4 | 96 | static void *dlfcn_globallookup(const char *name); |
8f4fac7f GT |
97 | |
98 | static DSO_METHOD dso_meth_dlfcn = { | |
0f113f3e MC |
99 | "OpenSSL 'dlfcn' shared library method", |
100 | dlfcn_load, | |
101 | dlfcn_unload, | |
0f113f3e | 102 | dlfcn_bind_func, |
0f113f3e MC |
103 | NULL, /* ctrl */ |
104 | dlfcn_name_converter, | |
105 | dlfcn_merger, | |
106 | NULL, /* init */ | |
107 | NULL, /* finish */ | |
0f113f3e MC |
108 | dlfcn_globallookup |
109 | }; | |
8f4fac7f | 110 | |
38186bfd | 111 | DSO_METHOD *DSO_METHOD_openssl(void) |
0f113f3e | 112 | { |
38186bfd | 113 | return &dso_meth_dlfcn; |
0f113f3e MC |
114 | } |
115 | ||
116 | /* | |
117 | * Prior to using the dlopen() function, we should decide on the flag we | |
118 | * send. There's a few different ways of doing this and it's a messy | |
119 | * venn-diagram to match up which platforms support what. So as we don't have | |
120 | * autoconf yet, I'm implementing a hack that could be hacked further | |
121 | * relatively easily to deal with cases as we find them. Initially this is to | |
122 | * cope with OpenBSD. | |
123 | */ | |
124 | # if defined(__OpenBSD__) || defined(__NetBSD__) | |
125 | # ifdef DL_LAZY | |
126 | # define DLOPEN_FLAG DL_LAZY | |
127 | # else | |
128 | # ifdef RTLD_NOW | |
129 | # define DLOPEN_FLAG RTLD_NOW | |
130 | # else | |
131 | # define DLOPEN_FLAG 0 | |
132 | # endif | |
133 | # endif | |
134 | # else | |
135 | # define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */ | |
136 | # endif | |
1a797ac6 | 137 | |
0f113f3e MC |
138 | /* |
139 | * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle | |
140 | * (void*) returned from dlopen(). | |
8f4fac7f GT |
141 | */ |
142 | ||
51c8dc37 | 143 | static int dlfcn_load(DSO *dso) |
0f113f3e MC |
144 | { |
145 | void *ptr = NULL; | |
146 | /* See applicable comments in dso_dl.c */ | |
147 | char *filename = DSO_convert_filename(dso, NULL); | |
148 | int flags = DLOPEN_FLAG; | |
149 | ||
150 | if (filename == NULL) { | |
151 | DSOerr(DSO_F_DLFCN_LOAD, DSO_R_NO_FILENAME); | |
152 | goto err; | |
153 | } | |
154 | # ifdef RTLD_GLOBAL | |
155 | if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS) | |
156 | flags |= RTLD_GLOBAL; | |
157 | # endif | |
158 | ptr = dlopen(filename, flags); | |
159 | if (ptr == NULL) { | |
160 | DSOerr(DSO_F_DLFCN_LOAD, DSO_R_LOAD_FAILED); | |
161 | ERR_add_error_data(4, "filename(", filename, "): ", dlerror()); | |
162 | goto err; | |
163 | } | |
164 | if (!sk_void_push(dso->meth_data, (char *)ptr)) { | |
165 | DSOerr(DSO_F_DLFCN_LOAD, DSO_R_STACK_ERROR); | |
166 | goto err; | |
167 | } | |
168 | /* Success */ | |
169 | dso->loaded_filename = filename; | |
170 | return (1); | |
171 | err: | |
172 | /* Cleanup! */ | |
b548a1f1 | 173 | OPENSSL_free(filename); |
0f113f3e MC |
174 | if (ptr != NULL) |
175 | dlclose(ptr); | |
176 | return (0); | |
51c8dc37 | 177 | } |
8f4fac7f GT |
178 | |
179 | static int dlfcn_unload(DSO *dso) | |
0f113f3e MC |
180 | { |
181 | void *ptr; | |
182 | if (dso == NULL) { | |
183 | DSOerr(DSO_F_DLFCN_UNLOAD, ERR_R_PASSED_NULL_PARAMETER); | |
184 | return (0); | |
185 | } | |
186 | if (sk_void_num(dso->meth_data) < 1) | |
187 | return (1); | |
188 | ptr = sk_void_pop(dso->meth_data); | |
189 | if (ptr == NULL) { | |
190 | DSOerr(DSO_F_DLFCN_UNLOAD, DSO_R_NULL_HANDLE); | |
191 | /* | |
192 | * Should push the value back onto the stack in case of a retry. | |
193 | */ | |
194 | sk_void_push(dso->meth_data, ptr); | |
195 | return (0); | |
196 | } | |
197 | /* For now I'm not aware of any errors associated with dlclose() */ | |
198 | dlclose(ptr); | |
199 | return (1); | |
200 | } | |
8f4fac7f | 201 | |
e9a68cfb | 202 | static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname) |
0f113f3e MC |
203 | { |
204 | void *ptr; | |
205 | union { | |
206 | DSO_FUNC_TYPE sym; | |
207 | void *dlret; | |
208 | } u; | |
209 | ||
210 | if ((dso == NULL) || (symname == NULL)) { | |
211 | DSOerr(DSO_F_DLFCN_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
212 | return (NULL); | |
213 | } | |
214 | if (sk_void_num(dso->meth_data) < 1) { | |
215 | DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_STACK_ERROR); | |
216 | return (NULL); | |
217 | } | |
218 | ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); | |
219 | if (ptr == NULL) { | |
220 | DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_NULL_HANDLE); | |
221 | return (NULL); | |
222 | } | |
223 | u.dlret = dlsym(ptr, symname); | |
224 | if (u.dlret == NULL) { | |
225 | DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_SYM_FAILURE); | |
226 | ERR_add_error_data(4, "symname(", symname, "): ", dlerror()); | |
227 | return (NULL); | |
228 | } | |
229 | return u.sym; | |
230 | } | |
8f4fac7f | 231 | |
cbecb3ac | 232 | static char *dlfcn_merger(DSO *dso, const char *filespec1, |
0f113f3e MC |
233 | const char *filespec2) |
234 | { | |
235 | char *merged; | |
236 | ||
237 | if (!filespec1 && !filespec2) { | |
238 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_PASSED_NULL_PARAMETER); | |
239 | return (NULL); | |
240 | } | |
241 | /* | |
242 | * If the first file specification is a rooted path, it rules. same goes | |
243 | * if the second file specification is missing. | |
244 | */ | |
245 | if (!filespec2 || (filespec1 != NULL && filespec1[0] == '/')) { | |
a89c9a0d | 246 | merged = OPENSSL_strdup(filespec1); |
90945fa3 | 247 | if (merged == NULL) { |
0f113f3e MC |
248 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); |
249 | return (NULL); | |
250 | } | |
0f113f3e MC |
251 | } |
252 | /* | |
253 | * If the first file specification is missing, the second one rules. | |
254 | */ | |
255 | else if (!filespec1) { | |
a89c9a0d | 256 | merged = OPENSSL_strdup(filespec2); |
90945fa3 | 257 | if (merged == NULL) { |
0f113f3e MC |
258 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); |
259 | return (NULL); | |
260 | } | |
b7573c59 | 261 | } else { |
0f113f3e MC |
262 | /* |
263 | * This part isn't as trivial as it looks. It assumes that the | |
264 | * second file specification really is a directory, and makes no | |
265 | * checks whatsoever. Therefore, the result becomes the | |
266 | * concatenation of filespec2 followed by a slash followed by | |
267 | * filespec1. | |
268 | */ | |
0f113f3e MC |
269 | int spec2len, len; |
270 | ||
271 | spec2len = strlen(filespec2); | |
b7573c59 | 272 | len = spec2len + strlen(filespec1); |
0f113f3e | 273 | |
b7573c59 | 274 | if (spec2len && filespec2[spec2len - 1] == '/') { |
0f113f3e MC |
275 | spec2len--; |
276 | len--; | |
277 | } | |
278 | merged = OPENSSL_malloc(len + 2); | |
90945fa3 | 279 | if (merged == NULL) { |
0f113f3e MC |
280 | DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); |
281 | return (NULL); | |
282 | } | |
283 | strcpy(merged, filespec2); | |
284 | merged[spec2len] = '/'; | |
285 | strcpy(&merged[spec2len + 1], filespec1); | |
286 | } | |
287 | return (merged); | |
288 | } | |
4a620922 | 289 | |
51c8dc37 | 290 | static char *dlfcn_name_converter(DSO *dso, const char *filename) |
0f113f3e MC |
291 | { |
292 | char *translated; | |
293 | int len, rsize, transform; | |
294 | ||
295 | len = strlen(filename); | |
296 | rsize = len + 1; | |
297 | transform = (strstr(filename, "/") == NULL); | |
298 | if (transform) { | |
299 | /* We will convert this to "%s.so" or "lib%s.so" etc */ | |
e987f9f2 | 300 | rsize += strlen(DSO_EXTENSION); /* The length of ".so" */ |
0f113f3e MC |
301 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) |
302 | rsize += 3; /* The length of "lib" */ | |
303 | } | |
304 | translated = OPENSSL_malloc(rsize); | |
305 | if (translated == NULL) { | |
306 | DSOerr(DSO_F_DLFCN_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED); | |
307 | return (NULL); | |
308 | } | |
309 | if (transform) { | |
310 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) | |
e987f9f2 | 311 | sprintf(translated, "lib%s" DSO_EXTENSION, filename); |
0f113f3e | 312 | else |
e987f9f2 | 313 | sprintf(translated, "%s" DSO_EXTENSION, filename); |
0f113f3e MC |
314 | } else |
315 | sprintf(translated, "%s", filename); | |
316 | return (translated); | |
317 | } | |
318 | ||
319 | # ifdef __sgi | |
23a22b4c | 320 | /*- |
7ed87653 AP |
321 | This is a quote from IRIX manual for dladdr(3c): |
322 | ||
323 | <dlfcn.h> does not contain a prototype for dladdr or definition of | |
324 | Dl_info. The #include <dlfcn.h> in the SYNOPSIS line is traditional, | |
325 | but contains no dladdr prototype and no IRIX library contains an | |
326 | implementation. Write your own declaration based on the code below. | |
327 | ||
328 | The following code is dependent on internal interfaces that are not | |
329 | part of the IRIX compatibility guarantee; however, there is no future | |
330 | intention to change this interface, so on a practical level, the code | |
331 | below is safe to use on IRIX. | |
c8e1edaa | 332 | */ |
0f113f3e MC |
333 | # include <rld_interface.h> |
334 | # ifndef _RLD_INTERFACE_DLFCN_H_DLADDR | |
335 | # define _RLD_INTERFACE_DLFCN_H_DLADDR | |
7ed87653 | 336 | typedef struct Dl_info { |
0f113f3e MC |
337 | const char *dli_fname; |
338 | void *dli_fbase; | |
339 | const char *dli_sname; | |
340 | void *dli_saddr; | |
341 | int dli_version; | |
342 | int dli_reserved1; | |
343 | long dli_reserved[4]; | |
7ed87653 | 344 | } Dl_info; |
0f113f3e | 345 | # else |
7ed87653 | 346 | typedef struct Dl_info Dl_info; |
0f113f3e MC |
347 | # endif |
348 | # define _RLD_DLADDR 14 | |
7ed87653 AP |
349 | |
350 | static int dladdr(void *address, Dl_info *dl) | |
351 | { | |
0f113f3e MC |
352 | void *v; |
353 | v = _rld_new_interface(_RLD_DLADDR, address, dl); | |
354 | return (int)v; | |
355 | } | |
356 | # endif /* __sgi */ | |
357 | ||
c6cb42e4 | 358 | static void *dlfcn_globallookup(const char *name) |
0f113f3e MC |
359 | { |
360 | void *ret = NULL, *handle = dlopen(NULL, RTLD_LAZY); | |
361 | ||
362 | if (handle) { | |
363 | ret = dlsym(handle, name); | |
364 | dlclose(handle); | |
365 | } | |
366 | ||
367 | return ret; | |
368 | } | |
369 | #endif /* DSO_DLFCN */ |