3 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
62 #include <openssl/dso.h>
65 DSO_METHOD *DSO_METHOD_dl(void)
73 /* Part of the hack in "dl_load" ... */
74 # define DSO_MAX_TRANSLATED_SIZE 256
76 static int dl_load(DSO *dso);
77 static int dl_unload(DSO *dso);
78 static void *dl_bind_var(DSO *dso, const char *symname);
79 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
81 static int dl_unbind_var(DSO *dso, char *symname, void *symptr);
82 static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
83 static int dl_init(DSO *dso);
84 static int dl_finish(DSO *dso);
85 static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
87 static char *dl_name_converter(DSO *dso, const char *filename);
88 static char *dl_merger(DSO *dso, const char *filespec1,
89 const char *filespec2);
90 static int dl_pathbyaddr(void *addr, char *path, int sz);
91 static void *dl_globallookup(const char *name);
93 static DSO_METHOD dso_meth_dl = {
94 "OpenSSL 'dl' shared library method",
99 /* For now, "unbind" doesn't exist */
101 NULL, /* unbind_var */
102 NULL, /* unbind_func */
113 DSO_METHOD *DSO_METHOD_dl(void)
115 return (&dso_meth_dl);
119 * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
120 * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
121 * itself a pointer type so the cast is safe.
124 static int dl_load(DSO *dso)
128 * We don't do any fancy retries or anything, just take the method's (or
129 * DSO's if it has the callback set) best translation of the
130 * platform-independant filename and try once with that.
132 char *filename = DSO_convert_filename(dso, NULL);
134 if (filename == NULL) {
135 DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME);
138 ptr = shl_load(filename, BIND_IMMEDIATE |
139 (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 :
142 DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED);
143 ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno));
146 if (!sk_push(dso->meth_data, (char *)ptr)) {
147 DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR);
151 * Success, stick the converted filename we've loaded under into the DSO
152 * (it also serves as the indicator that we are currently loaded).
154 dso->loaded_filename = filename;
158 if (filename != NULL)
159 OPENSSL_free(filename);
165 static int dl_unload(DSO *dso)
169 DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
172 if (sk_num(dso->meth_data) < 1)
174 /* Is this statement legal? */
175 ptr = (shl_t) sk_pop(dso->meth_data);
177 DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE);
179 * Should push the value back onto the stack in case of a retry.
181 sk_push(dso->meth_data, (char *)ptr);
188 static void *dl_bind_var(DSO *dso, const char *symname)
193 if ((dso == NULL) || (symname == NULL)) {
194 DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
197 if (sk_num(dso->meth_data) < 1) {
198 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR);
201 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
203 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE);
206 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
207 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE);
208 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
214 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
219 if ((dso == NULL) || (symname == NULL)) {
220 DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
223 if (sk_num(dso->meth_data) < 1) {
224 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR);
227 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
229 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE);
232 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
233 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE);
234 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
237 return ((DSO_FUNC_TYPE)sym);
240 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
244 if (!filespec1 && !filespec2) {
245 DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER);
249 * If the first file specification is a rooted path, it rules. same goes
250 * if the second file specification is missing.
252 if (!filespec2 || filespec1[0] == '/') {
253 merged = OPENSSL_malloc(strlen(filespec1) + 1);
255 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
258 strcpy(merged, filespec1);
261 * If the first file specification is missing, the second one rules.
263 else if (!filespec1) {
264 merged = OPENSSL_malloc(strlen(filespec2) + 1);
266 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
269 strcpy(merged, filespec2);
272 * This part isn't as trivial as it looks. It assumes that the
273 * second file specification really is a directory, and makes no
274 * checks whatsoever. Therefore, the result becomes the
275 * concatenation of filespec2 followed by a slash followed by
281 spec2len = (filespec2 ? strlen(filespec2) : 0);
282 len = spec2len + (filespec1 ? strlen(filespec1) : 0);
284 if (filespec2 && filespec2[spec2len - 1] == '/') {
288 merged = OPENSSL_malloc(len + 2);
290 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
293 strcpy(merged, filespec2);
294 merged[spec2len] = '/';
295 strcpy(&merged[spec2len + 1], filespec1);
301 * This function is identical to the one in dso_dlfcn.c, but as it is highly
302 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
303 * the same time, there's no great duplicating the code. Figuring out an
304 * elegant way to share one copy of the code would be more difficult and
305 * would not leave the implementations independant.
308 static const char extension[] = ".sl";
310 static const char extension[] = ".so";
312 static char *dl_name_converter(DSO *dso, const char *filename)
315 int len, rsize, transform;
317 len = strlen(filename);
319 transform = (strstr(filename, "/") == NULL);
321 /* We will convert this to "%s.s?" or "lib%s.s?" */
322 rsize += strlen(extension); /* The length of ".s?" */
323 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
324 rsize += 3; /* The length of "lib" */
326 translated = OPENSSL_malloc(rsize);
327 if (translated == NULL) {
328 DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
332 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
333 sprintf(translated, "lib%s%s", filename, extension);
335 sprintf(translated, "%s%s", filename, extension);
337 sprintf(translated, "%s", filename);
341 static int dl_pathbyaddr(void *addr, char *path, int sz)
343 struct shl_descriptor inf;
348 int (*f) (void *, char *, int);
356 for (i = -1; shl_get_r(i, &inf) == 0; i++) {
357 if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
358 ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) {
359 len = (int)strlen(inf.filename);
364 memcpy(path, inf.filename, len);
373 static void *dl_globallookup(const char *name)
378 return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret;