2 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
62 DSO_METHOD *DSO_METHOD_dl(void)
70 /* Part of the hack in "dl_load" ... */
71 # define DSO_MAX_TRANSLATED_SIZE 256
73 static int dl_load(DSO *dso);
74 static int dl_unload(DSO *dso);
75 static void *dl_bind_var(DSO *dso, const char *symname);
76 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
77 static char *dl_name_converter(DSO *dso, const char *filename);
78 static char *dl_merger(DSO *dso, const char *filespec1,
79 const char *filespec2);
80 static int dl_pathbyaddr(void *addr, char *path, int sz);
81 static void *dl_globallookup(const char *name);
83 static DSO_METHOD dso_meth_dl = {
84 "OpenSSL 'dl' shared library method",
98 DSO_METHOD *DSO_METHOD_dl(void)
100 return (&dso_meth_dl);
104 * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
105 * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
106 * itself a pointer type so the cast is safe.
109 static int dl_load(DSO *dso)
113 * We don't do any fancy retries or anything, just take the method's (or
114 * DSO's if it has the callback set) best translation of the
115 * platform-independent filename and try once with that.
117 char *filename = DSO_convert_filename(dso, NULL);
119 if (filename == NULL) {
120 DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME);
123 ptr = shl_load(filename, BIND_IMMEDIATE |
124 (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 :
127 DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED);
128 ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno));
131 if (!sk_push(dso->meth_data, (char *)ptr)) {
132 DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR);
136 * Success, stick the converted filename we've loaded under into the DSO
137 * (it also serves as the indicator that we are currently loaded).
139 dso->loaded_filename = filename;
143 OPENSSL_free(filename);
149 static int dl_unload(DSO *dso)
153 DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
156 if (sk_num(dso->meth_data) < 1)
158 /* Is this statement legal? */
159 ptr = (shl_t) sk_pop(dso->meth_data);
161 DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE);
163 * Should push the value back onto the stack in case of a retry.
165 sk_push(dso->meth_data, (char *)ptr);
172 static void *dl_bind_var(DSO *dso, const char *symname)
177 if ((dso == NULL) || (symname == NULL)) {
178 DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
181 if (sk_num(dso->meth_data) < 1) {
182 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR);
185 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
187 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE);
190 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
191 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE);
192 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
198 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
203 if ((dso == NULL) || (symname == NULL)) {
204 DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
207 if (sk_num(dso->meth_data) < 1) {
208 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR);
211 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
213 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE);
216 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
217 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE);
218 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
221 return ((DSO_FUNC_TYPE)sym);
224 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
228 if (!filespec1 && !filespec2) {
229 DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER);
233 * If the first file specification is a rooted path, it rules. same goes
234 * if the second file specification is missing.
236 if (!filespec2 || filespec1[0] == '/') {
237 merged = OPENSSL_strdup(filespec1);
238 if (merged == NULL) {
239 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
244 * If the first file specification is missing, the second one rules.
246 else if (!filespec1) {
247 merged = OPENSSL_strdup(filespec2);
248 if (merged == NULL) {
249 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
254 * This part isn't as trivial as it looks. It assumes that the
255 * second file specification really is a directory, and makes no
256 * checks whatsoever. Therefore, the result becomes the
257 * concatenation of filespec2 followed by a slash followed by
263 spec2len = (filespec2 ? strlen(filespec2) : 0);
264 len = spec2len + (filespec1 ? strlen(filespec1) : 0);
266 if (spec2len && filespec2[spec2len - 1] == '/') {
270 merged = OPENSSL_malloc(len + 2);
271 if (merged == NULL) {
272 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
275 strcpy(merged, filespec2);
276 merged[spec2len] = '/';
277 strcpy(&merged[spec2len + 1], filespec1);
283 * This function is identical to the one in dso_dlfcn.c, but as it is highly
284 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
285 * the same time, there's no great duplicating the code. Figuring out an
286 * elegant way to share one copy of the code would be more difficult and
287 * would not leave the implementations independent.
289 static char *dl_name_converter(DSO *dso, const char *filename)
292 int len, rsize, transform;
294 len = strlen(filename);
296 transform = (strstr(filename, "/") == NULL);
298 /* We will convert this to "%s.s?" or "lib%s.s?" */
299 rsize += strlen(DSO_EXTENSION); /* The length of ".s?" */
300 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
301 rsize += 3; /* The length of "lib" */
303 translated = OPENSSL_malloc(rsize);
304 if (translated == NULL) {
305 DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
309 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
310 sprintf(translated, "lib%s%s", filename, DSO_EXTENSION);
312 sprintf(translated, "%s%s", filename, DSO_EXTENSION);
314 sprintf(translated, "%s", filename);
318 static int dl_pathbyaddr(void *addr, char *path, int sz)
320 struct shl_descriptor inf;
325 int (*f) (void *, char *, int);
333 for (i = -1; shl_get_r(i, &inf) == 0; i++) {
334 if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
335 ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) {
336 len = (int)strlen(inf.filename);
341 memcpy(path, inf.filename, len);
350 static void *dl_globallookup(const char *name)
355 return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret;