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).
60 #include "internal/cryptlib.h"
61 #include <openssl/dso.h>
64 DSO_METHOD *DSO_METHOD_dl(void)
72 /* Part of the hack in "dl_load" ... */
73 # define DSO_MAX_TRANSLATED_SIZE 256
75 static int dl_load(DSO *dso);
76 static int dl_unload(DSO *dso);
77 static void *dl_bind_var(DSO *dso, const char *symname);
78 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
79 static char *dl_name_converter(DSO *dso, const char *filename);
80 static char *dl_merger(DSO *dso, const char *filespec1,
81 const char *filespec2);
82 static int dl_pathbyaddr(void *addr, char *path, int sz);
83 static void *dl_globallookup(const char *name);
85 static DSO_METHOD dso_meth_dl = {
86 "OpenSSL 'dl' shared library method",
100 DSO_METHOD *DSO_METHOD_dl(void)
102 return (&dso_meth_dl);
106 * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
107 * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
108 * itself a pointer type so the cast is safe.
111 static int dl_load(DSO *dso)
115 * We don't do any fancy retries or anything, just take the method's (or
116 * DSO's if it has the callback set) best translation of the
117 * platform-independent filename and try once with that.
119 char *filename = DSO_convert_filename(dso, NULL);
121 if (filename == NULL) {
122 DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME);
125 ptr = shl_load(filename, BIND_IMMEDIATE |
126 (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 :
129 DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED);
130 ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno));
133 if (!sk_push(dso->meth_data, (char *)ptr)) {
134 DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR);
138 * Success, stick the converted filename we've loaded under into the DSO
139 * (it also serves as the indicator that we are currently loaded).
141 dso->loaded_filename = filename;
145 OPENSSL_free(filename);
151 static int dl_unload(DSO *dso)
155 DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
158 if (sk_num(dso->meth_data) < 1)
160 /* Is this statement legal? */
161 ptr = (shl_t) sk_pop(dso->meth_data);
163 DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE);
165 * Should push the value back onto the stack in case of a retry.
167 sk_push(dso->meth_data, (char *)ptr);
174 static void *dl_bind_var(DSO *dso, const char *symname)
179 if ((dso == NULL) || (symname == NULL)) {
180 DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
183 if (sk_num(dso->meth_data) < 1) {
184 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR);
187 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
189 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE);
192 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
193 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE);
194 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
200 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
205 if ((dso == NULL) || (symname == NULL)) {
206 DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
209 if (sk_num(dso->meth_data) < 1) {
210 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR);
213 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
215 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE);
218 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
219 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE);
220 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
223 return ((DSO_FUNC_TYPE)sym);
226 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
230 if (!filespec1 && !filespec2) {
231 DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER);
235 * If the first file specification is a rooted path, it rules. same goes
236 * if the second file specification is missing.
238 if (!filespec2 || filespec1[0] == '/') {
239 merged = OPENSSL_malloc(strlen(filespec1) + 1);
240 if (merged == NULL) {
241 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
244 strcpy(merged, filespec1);
247 * If the first file specification is missing, the second one rules.
249 else if (!filespec1) {
250 merged = OPENSSL_malloc(strlen(filespec2) + 1);
251 if (merged == NULL) {
252 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
255 strcpy(merged, filespec2);
258 * This part isn't as trivial as it looks. It assumes that the
259 * second file specification really is a directory, and makes no
260 * checks whatsoever. Therefore, the result becomes the
261 * concatenation of filespec2 followed by a slash followed by
267 spec2len = (filespec2 ? strlen(filespec2) : 0);
268 len = spec2len + (filespec1 ? strlen(filespec1) : 0);
270 if (filespec2 && filespec2[spec2len - 1] == '/') {
274 merged = OPENSSL_malloc(len + 2);
275 if (merged == NULL) {
276 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
279 strcpy(merged, filespec2);
280 merged[spec2len] = '/';
281 strcpy(&merged[spec2len + 1], filespec1);
287 * This function is identical to the one in dso_dlfcn.c, but as it is highly
288 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
289 * the same time, there's no great duplicating the code. Figuring out an
290 * elegant way to share one copy of the code would be more difficult and
291 * would not leave the implementations independent.
294 static const char extension[] = ".sl";
296 static const char extension[] = ".so";
298 static char *dl_name_converter(DSO *dso, const char *filename)
301 int len, rsize, transform;
303 len = strlen(filename);
305 transform = (strstr(filename, "/") == NULL);
307 /* We will convert this to "%s.s?" or "lib%s.s?" */
308 rsize += strlen(extension); /* The length of ".s?" */
309 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
310 rsize += 3; /* The length of "lib" */
312 translated = OPENSSL_malloc(rsize);
313 if (translated == NULL) {
314 DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
318 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
319 sprintf(translated, "lib%s%s", filename, extension);
321 sprintf(translated, "%s%s", filename, extension);
323 sprintf(translated, "%s", filename);
327 static int dl_pathbyaddr(void *addr, char *path, int sz)
329 struct shl_descriptor inf;
334 int (*f) (void *, char *, int);
342 for (i = -1; shl_get_r(i, &inf) == 0; i++) {
343 if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
344 ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) {
345 len = (int)strlen(inf.filename);
350 memcpy(path, inf.filename, len);
359 static void *dl_globallookup(const char *name)
364 return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret;