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).
61 #include "internal/cryptlib.h"
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
);
80 static char *dl_name_converter(DSO
*dso
, const char *filename
);
81 static char *dl_merger(DSO
*dso
, const char *filespec1
,
82 const char *filespec2
);
83 static int dl_pathbyaddr(void *addr
, char *path
, int sz
);
84 static void *dl_globallookup(const char *name
);
86 static DSO_METHOD dso_meth_dl
= {
87 "OpenSSL 'dl' shared library method",
101 DSO_METHOD
*DSO_METHOD_dl(void)
103 return (&dso_meth_dl
);
107 * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
108 * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
109 * itself a pointer type so the cast is safe.
112 static int dl_load(DSO
*dso
)
116 * We don't do any fancy retries or anything, just take the method's (or
117 * DSO's if it has the callback set) best translation of the
118 * platform-independent filename and try once with that.
120 char *filename
= DSO_convert_filename(dso
, NULL
);
122 if (filename
== NULL
) {
123 DSOerr(DSO_F_DL_LOAD
, DSO_R_NO_FILENAME
);
126 ptr
= shl_load(filename
, BIND_IMMEDIATE
|
127 (dso
->flags
& DSO_FLAG_NO_NAME_TRANSLATION
? 0 :
130 DSOerr(DSO_F_DL_LOAD
, DSO_R_LOAD_FAILED
);
131 ERR_add_error_data(4, "filename(", filename
, "): ", strerror(errno
));
134 if (!sk_push(dso
->meth_data
, (char *)ptr
)) {
135 DSOerr(DSO_F_DL_LOAD
, DSO_R_STACK_ERROR
);
139 * Success, stick the converted filename we've loaded under into the DSO
140 * (it also serves as the indicator that we are currently loaded).
142 dso
->loaded_filename
= filename
;
146 OPENSSL_free(filename
);
152 static int dl_unload(DSO
*dso
)
156 DSOerr(DSO_F_DL_UNLOAD
, ERR_R_PASSED_NULL_PARAMETER
);
159 if (sk_num(dso
->meth_data
) < 1)
161 /* Is this statement legal? */
162 ptr
= (shl_t
) sk_pop(dso
->meth_data
);
164 DSOerr(DSO_F_DL_UNLOAD
, DSO_R_NULL_HANDLE
);
166 * Should push the value back onto the stack in case of a retry.
168 sk_push(dso
->meth_data
, (char *)ptr
);
175 static void *dl_bind_var(DSO
*dso
, const char *symname
)
180 if ((dso
== NULL
) || (symname
== NULL
)) {
181 DSOerr(DSO_F_DL_BIND_VAR
, ERR_R_PASSED_NULL_PARAMETER
);
184 if (sk_num(dso
->meth_data
) < 1) {
185 DSOerr(DSO_F_DL_BIND_VAR
, DSO_R_STACK_ERROR
);
188 ptr
= (shl_t
) sk_value(dso
->meth_data
, sk_num(dso
->meth_data
) - 1);
190 DSOerr(DSO_F_DL_BIND_VAR
, DSO_R_NULL_HANDLE
);
193 if (shl_findsym(&ptr
, symname
, TYPE_UNDEFINED
, &sym
) < 0) {
194 DSOerr(DSO_F_DL_BIND_VAR
, DSO_R_SYM_FAILURE
);
195 ERR_add_error_data(4, "symname(", symname
, "): ", strerror(errno
));
201 static DSO_FUNC_TYPE
dl_bind_func(DSO
*dso
, const char *symname
)
206 if ((dso
== NULL
) || (symname
== NULL
)) {
207 DSOerr(DSO_F_DL_BIND_FUNC
, ERR_R_PASSED_NULL_PARAMETER
);
210 if (sk_num(dso
->meth_data
) < 1) {
211 DSOerr(DSO_F_DL_BIND_FUNC
, DSO_R_STACK_ERROR
);
214 ptr
= (shl_t
) sk_value(dso
->meth_data
, sk_num(dso
->meth_data
) - 1);
216 DSOerr(DSO_F_DL_BIND_FUNC
, DSO_R_NULL_HANDLE
);
219 if (shl_findsym(&ptr
, symname
, TYPE_UNDEFINED
, &sym
) < 0) {
220 DSOerr(DSO_F_DL_BIND_FUNC
, DSO_R_SYM_FAILURE
);
221 ERR_add_error_data(4, "symname(", symname
, "): ", strerror(errno
));
224 return ((DSO_FUNC_TYPE
)sym
);
227 static char *dl_merger(DSO
*dso
, const char *filespec1
, const char *filespec2
)
231 if (!filespec1
&& !filespec2
) {
232 DSOerr(DSO_F_DL_MERGER
, ERR_R_PASSED_NULL_PARAMETER
);
236 * If the first file specification is a rooted path, it rules. same goes
237 * if the second file specification is missing.
239 if (!filespec2
|| filespec1
[0] == '/') {
240 merged
= OPENSSL_malloc(strlen(filespec1
) + 1);
241 if (merged
== NULL
) {
242 DSOerr(DSO_F_DL_MERGER
, ERR_R_MALLOC_FAILURE
);
245 strcpy(merged
, filespec1
);
248 * If the first file specification is missing, the second one rules.
250 else if (!filespec1
) {
251 merged
= OPENSSL_malloc(strlen(filespec2
) + 1);
252 if (merged
== NULL
) {
253 DSOerr(DSO_F_DL_MERGER
, ERR_R_MALLOC_FAILURE
);
256 strcpy(merged
, filespec2
);
259 * This part isn't as trivial as it looks. It assumes that the
260 * second file specification really is a directory, and makes no
261 * checks whatsoever. Therefore, the result becomes the
262 * concatenation of filespec2 followed by a slash followed by
268 spec2len
= (filespec2
? strlen(filespec2
) : 0);
269 len
= spec2len
+ (filespec1
? strlen(filespec1
) : 0);
271 if (filespec2
&& filespec2
[spec2len
- 1] == '/') {
275 merged
= OPENSSL_malloc(len
+ 2);
276 if (merged
== NULL
) {
277 DSOerr(DSO_F_DL_MERGER
, ERR_R_MALLOC_FAILURE
);
280 strcpy(merged
, filespec2
);
281 merged
[spec2len
] = '/';
282 strcpy(&merged
[spec2len
+ 1], filespec1
);
288 * This function is identical to the one in dso_dlfcn.c, but as it is highly
289 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
290 * the same time, there's no great duplicating the code. Figuring out an
291 * elegant way to share one copy of the code would be more difficult and
292 * would not leave the implementations independent.
295 static const char extension
[] = ".sl";
297 static const char extension
[] = ".so";
299 static char *dl_name_converter(DSO
*dso
, const char *filename
)
302 int len
, rsize
, transform
;
304 len
= strlen(filename
);
306 transform
= (strstr(filename
, "/") == NULL
);
308 /* We will convert this to "%s.s?" or "lib%s.s?" */
309 rsize
+= strlen(extension
); /* The length of ".s?" */
310 if ((DSO_flags(dso
) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY
) == 0)
311 rsize
+= 3; /* The length of "lib" */
313 translated
= OPENSSL_malloc(rsize
);
314 if (translated
== NULL
) {
315 DSOerr(DSO_F_DL_NAME_CONVERTER
, DSO_R_NAME_TRANSLATION_FAILED
);
319 if ((DSO_flags(dso
) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY
) == 0)
320 sprintf(translated
, "lib%s%s", filename
, extension
);
322 sprintf(translated
, "%s%s", filename
, extension
);
324 sprintf(translated
, "%s", filename
);
328 static int dl_pathbyaddr(void *addr
, char *path
, int sz
)
330 struct shl_descriptor inf
;
335 int (*f
) (void *, char *, int);
343 for (i
= -1; shl_get_r(i
, &inf
) == 0; i
++) {
344 if (((size_t)addr
>= inf
.tstart
&& (size_t)addr
< inf
.tend
) ||
345 ((size_t)addr
>= inf
.dstart
&& (size_t)addr
< inf
.dend
)) {
346 len
= (int)strlen(inf
.filename
);
351 memcpy(path
, inf
.filename
, len
);
360 static void *dl_globallookup(const char *name
)
365 return shl_findsym(&h
, name
, TYPE_UNDEFINED
, &ret
) ? NULL
: ret
;