1 /* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */
3 * Written by Geoff Thorpe (geoff@geoffthorpe.net) 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
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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,
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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 <openssl/crypto.h>
63 #include <openssl/dso.h>
65 static DSO_METHOD *default_DSO_meth = NULL;
69 return (DSO_new_method(NULL));
72 void DSO_set_default_method(DSO_METHOD *meth)
74 default_DSO_meth = meth;
77 DSO_METHOD *DSO_get_default_method(void)
79 return (default_DSO_meth);
82 DSO_METHOD *DSO_get_method(DSO *dso)
87 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
95 DSO *DSO_new_method(DSO_METHOD *meth)
99 if (default_DSO_meth == NULL) {
101 * We default to DSO_METH_openssl() which in turn defaults to
102 * stealing the "best available" method. Will fallback to
103 * DSO_METH_null() in the worst case.
105 default_DSO_meth = DSO_METHOD_openssl();
107 ret = OPENSSL_malloc(sizeof(DSO));
109 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
112 memset(ret, 0, sizeof(DSO));
113 ret->meth_data = sk_void_new_null();
114 if (ret->meth_data == NULL) {
115 /* sk_new doesn't generate any errors so we do */
116 DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
121 ret->meth = default_DSO_meth;
125 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
132 int DSO_free(DSO *dso)
137 DSOerr(DSO_F_DSO_FREE, ERR_R_PASSED_NULL_PARAMETER);
141 i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
143 REF_PRINT("DSO", dso);
149 fprintf(stderr, "DSO_free, bad reference count\n");
154 if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
155 DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
159 if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
160 DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
164 sk_void_free(dso->meth_data);
165 OPENSSL_free(dso->filename);
166 OPENSSL_free(dso->loaded_filename);
171 int DSO_flags(DSO *dso)
173 return ((dso == NULL) ? 0 : dso->flags);
176 int DSO_up_ref(DSO *dso)
179 DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
183 CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
187 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
193 ret = DSO_new_method(meth);
195 DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
199 /* Pass the provided flags to the new DSO object */
200 if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
201 DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
206 /* Don't load if we're currently already loaded */
207 if (ret->filename != NULL) {
208 DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
212 * filename can only be NULL if we were passed a dso that already has one
215 if (filename != NULL)
216 if (!DSO_set_filename(ret, filename)) {
217 DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
220 filename = ret->filename;
221 if (filename == NULL) {
222 DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
225 if (ret->meth->dso_load == NULL) {
226 DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
229 if (!ret->meth->dso_load(ret)) {
230 DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
241 void *DSO_bind_var(DSO *dso, const char *symname)
245 if ((dso == NULL) || (symname == NULL)) {
246 DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
249 if (dso->meth->dso_bind_var == NULL) {
250 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
253 if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
254 DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
261 DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
263 DSO_FUNC_TYPE ret = NULL;
265 if ((dso == NULL) || (symname == NULL)) {
266 DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
269 if (dso->meth->dso_bind_func == NULL) {
270 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
273 if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
274 DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
282 * I don't really like these *_ctrl functions very much to be perfectly
283 * honest. For one thing, I think I have to return a negative value for any
284 * error because possible DSO_ctrl() commands may return values such as
285 * "size"s that can legitimately be zero (making the standard
286 * "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
287 * times. I'd prefer "output" values to be passed by reference and the return
288 * value as success/failure like usual ... but we conform when we must... :-)
290 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
293 DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
297 * We should intercept certain generic commands and only pass control to
298 * the method-specific ctrl() function if it's something we don't handle.
301 case DSO_CTRL_GET_FLAGS:
303 case DSO_CTRL_SET_FLAGS:
304 dso->flags = (int)larg;
306 case DSO_CTRL_OR_FLAGS:
307 dso->flags |= (int)larg;
312 if ((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL)) {
313 DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
316 return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
319 int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
320 DSO_NAME_CONVERTER_FUNC *oldcb)
323 DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
327 *oldcb = dso->name_converter;
328 dso->name_converter = cb;
332 const char *DSO_get_filename(DSO *dso)
335 DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
338 return (dso->filename);
341 int DSO_set_filename(DSO *dso, const char *filename)
345 if ((dso == NULL) || (filename == NULL)) {
346 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
349 if (dso->loaded_filename) {
350 DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
353 /* We'll duplicate filename */
354 copied = OPENSSL_malloc(strlen(filename) + 1);
355 if (copied == NULL) {
356 DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
359 BUF_strlcpy(copied, filename, strlen(filename) + 1);
360 OPENSSL_free(dso->filename);
361 dso->filename = copied;
365 char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
369 if (dso == NULL || filespec1 == NULL) {
370 DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
373 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
374 if (dso->merger != NULL)
375 result = dso->merger(dso, filespec1, filespec2);
376 else if (dso->meth->dso_merger != NULL)
377 result = dso->meth->dso_merger(dso, filespec1, filespec2);
382 char *DSO_convert_filename(DSO *dso, const char *filename)
387 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
390 if (filename == NULL)
391 filename = dso->filename;
392 if (filename == NULL) {
393 DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
396 if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
397 if (dso->name_converter != NULL)
398 result = dso->name_converter(dso, filename);
399 else if (dso->meth->dso_name_converter != NULL)
400 result = dso->meth->dso_name_converter(dso, filename);
402 if (result == NULL) {
403 result = OPENSSL_malloc(strlen(filename) + 1);
404 if (result == NULL) {
405 DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
408 BUF_strlcpy(result, filename, strlen(filename) + 1);
413 const char *DSO_get_loaded_filename(DSO *dso)
416 DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
419 return (dso->loaded_filename);
422 int DSO_pathbyaddr(void *addr, char *path, int sz)
424 DSO_METHOD *meth = default_DSO_meth;
426 meth = DSO_METHOD_openssl();
427 if (meth->pathbyaddr == NULL) {
428 DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
431 return (*meth->pathbyaddr) (addr, path, sz);
434 void *DSO_global_lookup(const char *name)
436 DSO_METHOD *meth = default_DSO_meth;
438 meth = DSO_METHOD_openssl();
439 if (meth->globallookup == NULL) {
440 DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
443 return (*meth->globallookup) (name);