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0f113f3e MC |
1 | /* |
2 | * Written by Richard Levitte (richard@levitte.org) 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 | 60 | |
38186bfd | 61 | #ifdef DSO_DL |
8f4fac7f | 62 | |
0f113f3e | 63 | # include <dl.h> |
8f4fac7f | 64 | |
b9e63915 | 65 | /* Part of the hack in "dl_load" ... */ |
0f113f3e | 66 | # define DSO_MAX_TRANSLATED_SIZE 256 |
b9e63915 | 67 | |
51c8dc37 | 68 | static int dl_load(DSO *dso); |
8f4fac7f | 69 | static int dl_unload(DSO *dso); |
e9a68cfb GT |
70 | static void *dl_bind_var(DSO *dso, const char *symname); |
71 | static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname); | |
51c8dc37 | 72 | static char *dl_name_converter(DSO *dso, const char *filename); |
0f113f3e MC |
73 | static char *dl_merger(DSO *dso, const char *filespec1, |
74 | const char *filespec2); | |
75 | static int dl_pathbyaddr(void *addr, char *path, int sz); | |
c6cb42e4 | 76 | static void *dl_globallookup(const char *name); |
8f4fac7f GT |
77 | |
78 | static DSO_METHOD dso_meth_dl = { | |
0f113f3e MC |
79 | "OpenSSL 'dl' shared library method", |
80 | dl_load, | |
81 | dl_unload, | |
82 | dl_bind_var, | |
83 | dl_bind_func, | |
0f113f3e MC |
84 | NULL, /* ctrl */ |
85 | dl_name_converter, | |
86 | dl_merger, | |
87 | NULL, /* init */ | |
88 | NULL, /* finish */ | |
89 | dl_pathbyaddr, | |
90 | dl_globallookup | |
91 | }; | |
8f4fac7f | 92 | |
38186bfd | 93 | DSO_METHOD *DSO_METHOD_openssl(void) |
0f113f3e | 94 | { |
38186bfd | 95 | return &dso_meth_dl; |
0f113f3e | 96 | } |
8f4fac7f | 97 | |
0f113f3e MC |
98 | /* |
99 | * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle | |
100 | * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is | |
101 | * itself a pointer type so the cast is safe. | |
8f4fac7f GT |
102 | */ |
103 | ||
51c8dc37 | 104 | static int dl_load(DSO *dso) |
0f113f3e MC |
105 | { |
106 | shl_t ptr = NULL; | |
107 | /* | |
108 | * We don't do any fancy retries or anything, just take the method's (or | |
109 | * DSO's if it has the callback set) best translation of the | |
110 | * platform-independent filename and try once with that. | |
111 | */ | |
112 | char *filename = DSO_convert_filename(dso, NULL); | |
8f4fac7f | 113 | |
0f113f3e MC |
114 | if (filename == NULL) { |
115 | DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME); | |
116 | goto err; | |
117 | } | |
118 | ptr = shl_load(filename, BIND_IMMEDIATE | | |
119 | (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 : | |
120 | DYNAMIC_PATH), 0L); | |
121 | if (ptr == NULL) { | |
122 | DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED); | |
123 | ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno)); | |
124 | goto err; | |
125 | } | |
126 | if (!sk_push(dso->meth_data, (char *)ptr)) { | |
127 | DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR); | |
128 | goto err; | |
129 | } | |
130 | /* | |
131 | * Success, stick the converted filename we've loaded under into the DSO | |
132 | * (it also serves as the indicator that we are currently loaded). | |
133 | */ | |
134 | dso->loaded_filename = filename; | |
135 | return (1); | |
136 | err: | |
137 | /* Cleanup! */ | |
b548a1f1 | 138 | OPENSSL_free(filename); |
0f113f3e MC |
139 | if (ptr != NULL) |
140 | shl_unload(ptr); | |
141 | return (0); | |
142 | } | |
8f4fac7f GT |
143 | |
144 | static int dl_unload(DSO *dso) | |
0f113f3e MC |
145 | { |
146 | shl_t ptr; | |
147 | if (dso == NULL) { | |
148 | DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER); | |
149 | return (0); | |
150 | } | |
151 | if (sk_num(dso->meth_data) < 1) | |
152 | return (1); | |
153 | /* Is this statement legal? */ | |
154 | ptr = (shl_t) sk_pop(dso->meth_data); | |
155 | if (ptr == NULL) { | |
156 | DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE); | |
157 | /* | |
158 | * Should push the value back onto the stack in case of a retry. | |
159 | */ | |
160 | sk_push(dso->meth_data, (char *)ptr); | |
161 | return (0); | |
162 | } | |
163 | shl_unload(ptr); | |
164 | return (1); | |
165 | } | |
8f4fac7f | 166 | |
e9a68cfb | 167 | static void *dl_bind_var(DSO *dso, const char *symname) |
0f113f3e MC |
168 | { |
169 | shl_t ptr; | |
170 | void *sym; | |
8f4fac7f | 171 | |
0f113f3e MC |
172 | if ((dso == NULL) || (symname == NULL)) { |
173 | DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER); | |
174 | return (NULL); | |
175 | } | |
176 | if (sk_num(dso->meth_data) < 1) { | |
177 | DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR); | |
178 | return (NULL); | |
179 | } | |
180 | ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1); | |
181 | if (ptr == NULL) { | |
182 | DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE); | |
183 | return (NULL); | |
184 | } | |
185 | if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) { | |
186 | DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE); | |
187 | ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno)); | |
188 | return (NULL); | |
189 | } | |
190 | return (sym); | |
191 | } | |
e9a68cfb GT |
192 | |
193 | static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname) | |
0f113f3e MC |
194 | { |
195 | shl_t ptr; | |
196 | void *sym; | |
e9a68cfb | 197 | |
0f113f3e MC |
198 | if ((dso == NULL) || (symname == NULL)) { |
199 | DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
200 | return (NULL); | |
201 | } | |
202 | if (sk_num(dso->meth_data) < 1) { | |
203 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR); | |
204 | return (NULL); | |
205 | } | |
206 | ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1); | |
207 | if (ptr == NULL) { | |
208 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE); | |
209 | return (NULL); | |
210 | } | |
211 | if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) { | |
212 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE); | |
213 | ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno)); | |
214 | return (NULL); | |
215 | } | |
216 | return ((DSO_FUNC_TYPE)sym); | |
217 | } | |
8f4fac7f | 218 | |
cbecb3ac | 219 | static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2) |
0f113f3e MC |
220 | { |
221 | char *merged; | |
cbecb3ac | 222 | |
0f113f3e MC |
223 | if (!filespec1 && !filespec2) { |
224 | DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER); | |
225 | return (NULL); | |
226 | } | |
227 | /* | |
228 | * If the first file specification is a rooted path, it rules. same goes | |
229 | * if the second file specification is missing. | |
230 | */ | |
231 | if (!filespec2 || filespec1[0] == '/') { | |
a89c9a0d | 232 | merged = OPENSSL_strdup(filespec1); |
90945fa3 | 233 | if (merged == NULL) { |
0f113f3e MC |
234 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
235 | return (NULL); | |
236 | } | |
0f113f3e MC |
237 | } |
238 | /* | |
239 | * If the first file specification is missing, the second one rules. | |
240 | */ | |
241 | else if (!filespec1) { | |
a89c9a0d | 242 | merged = OPENSSL_strdup(filespec2); |
90945fa3 | 243 | if (merged == NULL) { |
0f113f3e MC |
244 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
245 | return (NULL); | |
246 | } | |
0f113f3e MC |
247 | } else |
248 | /* | |
249 | * This part isn't as trivial as it looks. It assumes that the | |
250 | * second file specification really is a directory, and makes no | |
251 | * checks whatsoever. Therefore, the result becomes the | |
252 | * concatenation of filespec2 followed by a slash followed by | |
253 | * filespec1. | |
254 | */ | |
255 | { | |
256 | int spec2len, len; | |
cbecb3ac | 257 | |
0f113f3e MC |
258 | spec2len = (filespec2 ? strlen(filespec2) : 0); |
259 | len = spec2len + (filespec1 ? strlen(filespec1) : 0); | |
cbecb3ac | 260 | |
947f9da1 | 261 | if (spec2len && filespec2[spec2len - 1] == '/') { |
0f113f3e MC |
262 | spec2len--; |
263 | len--; | |
264 | } | |
265 | merged = OPENSSL_malloc(len + 2); | |
90945fa3 | 266 | if (merged == NULL) { |
0f113f3e MC |
267 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
268 | return (NULL); | |
269 | } | |
270 | strcpy(merged, filespec2); | |
271 | merged[spec2len] = '/'; | |
272 | strcpy(&merged[spec2len + 1], filespec1); | |
273 | } | |
274 | return (merged); | |
275 | } | |
cbecb3ac | 276 | |
0f113f3e MC |
277 | /* |
278 | * This function is identical to the one in dso_dlfcn.c, but as it is highly | |
279 | * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at | |
280 | * the same time, there's no great duplicating the code. Figuring out an | |
281 | * elegant way to share one copy of the code would be more difficult and | |
282 | * would not leave the implementations independent. | |
283 | */ | |
51c8dc37 | 284 | static char *dl_name_converter(DSO *dso, const char *filename) |
0f113f3e MC |
285 | { |
286 | char *translated; | |
287 | int len, rsize, transform; | |
51c8dc37 | 288 | |
0f113f3e MC |
289 | len = strlen(filename); |
290 | rsize = len + 1; | |
291 | transform = (strstr(filename, "/") == NULL); | |
292 | { | |
293 | /* We will convert this to "%s.s?" or "lib%s.s?" */ | |
e987f9f2 | 294 | rsize += strlen(DSO_EXTENSION); /* The length of ".s?" */ |
0f113f3e MC |
295 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) |
296 | rsize += 3; /* The length of "lib" */ | |
297 | } | |
298 | translated = OPENSSL_malloc(rsize); | |
299 | if (translated == NULL) { | |
300 | DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED); | |
301 | return (NULL); | |
302 | } | |
303 | if (transform) { | |
304 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) | |
e987f9f2 | 305 | sprintf(translated, "lib%s%s", filename, DSO_EXTENSION); |
0f113f3e | 306 | else |
e987f9f2 | 307 | sprintf(translated, "%s%s", filename, DSO_EXTENSION); |
0f113f3e MC |
308 | } else |
309 | sprintf(translated, "%s", filename); | |
310 | return (translated); | |
311 | } | |
51c8dc37 | 312 | |
0f113f3e MC |
313 | static int dl_pathbyaddr(void *addr, char *path, int sz) |
314 | { | |
315 | struct shl_descriptor inf; | |
316 | int i, len; | |
7ed87653 | 317 | |
0f113f3e MC |
318 | if (addr == NULL) { |
319 | union { | |
320 | int (*f) (void *, char *, int); | |
321 | void *p; | |
322 | } t = { | |
323 | dl_pathbyaddr | |
324 | }; | |
325 | addr = t.p; | |
326 | } | |
7ed87653 | 327 | |
0f113f3e MC |
328 | for (i = -1; shl_get_r(i, &inf) == 0; i++) { |
329 | if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) || | |
330 | ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) { | |
331 | len = (int)strlen(inf.filename); | |
332 | if (sz <= 0) | |
333 | return len + 1; | |
334 | if (len >= sz) | |
335 | len = sz - 1; | |
336 | memcpy(path, inf.filename, len); | |
337 | path[len++] = 0; | |
338 | return len; | |
339 | } | |
340 | } | |
7ed87653 | 341 | |
0f113f3e MC |
342 | return -1; |
343 | } | |
68b64fb6 | 344 | |
c6cb42e4 | 345 | static void *dl_globallookup(const char *name) |
0f113f3e MC |
346 | { |
347 | void *ret; | |
348 | shl_t h = NULL; | |
68b64fb6 | 349 | |
0f113f3e MC |
350 | return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret; |
351 | } | |
352 | #endif /* DSO_DL */ |