1
/* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */
2
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
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 <openssl/crypto.h>
62
#include <openssl/dso.h>
64
static DSO_METHOD *default_DSO_meth = NULL;
68
return(DSO_new_method(NULL));
71
void DSO_set_default_method(DSO_METHOD *meth)
73
default_DSO_meth = meth;
76
DSO_METHOD *DSO_get_default_method(void)
78
return(default_DSO_meth);
81
DSO_METHOD *DSO_get_method(DSO *dso)
86
DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
94
DSO *DSO_new_method(DSO_METHOD *meth)
98
if(default_DSO_meth == NULL)
99
/* We default to DSO_METH_openssl() which in turn defaults
100
* to stealing the "best available" method. Will fallback
101
* to DSO_METH_null() in the worst case. */
102
default_DSO_meth = DSO_METHOD_openssl();
103
ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
106
DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
109
memset(ret, 0, sizeof(DSO));
110
ret->meth_data = sk_new_null();
111
if(ret->meth_data == NULL)
113
/* sk_new doesn't generate any errors so we do */
114
DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
119
ret->meth = default_DSO_meth;
123
if((ret->meth->init != NULL) && !ret->meth->init(ret))
131
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))
156
DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
160
if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
162
DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
166
sk_free(dso->meth_data);
167
if(dso->filename != NULL)
168
OPENSSL_free(dso->filename);
169
if(dso->loaded_filename != NULL)
170
OPENSSL_free(dso->loaded_filename);
176
int DSO_flags(DSO *dso)
178
return((dso == NULL) ? 0 : dso->flags);
182
int DSO_up_ref(DSO *dso)
186
DSOerr(DSO_F_DSO_UP_REF,ERR_R_PASSED_NULL_PARAMETER);
190
CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
194
DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
201
ret = DSO_new_method(meth);
204
DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
208
/* Pass the provided flags to the new DSO object */
209
if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)
211
DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
217
/* Don't load if we're currently already loaded */
218
if(ret->filename != NULL)
220
DSOerr(DSO_F_DSO_LOAD,DSO_R_DSO_ALREADY_LOADED);
223
/* filename can only be NULL if we were passed a dso that already has
226
if(!DSO_set_filename(ret, filename))
228
DSOerr(DSO_F_DSO_LOAD,DSO_R_SET_FILENAME_FAILED);
231
filename = ret->filename;
234
DSOerr(DSO_F_DSO_LOAD,DSO_R_NO_FILENAME);
237
if(ret->meth->dso_load == NULL)
239
DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
242
if(!ret->meth->dso_load(ret))
244
DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
255
void *DSO_bind_var(DSO *dso, const char *symname)
259
if((dso == NULL) || (symname == NULL))
261
DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
264
if(dso->meth->dso_bind_var == NULL)
266
DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);
269
if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)
271
DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE);
278
DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
280
DSO_FUNC_TYPE ret = NULL;
282
if((dso == NULL) || (symname == NULL))
284
DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
287
if(dso->meth->dso_bind_func == NULL)
289
DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);
292
if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)
294
DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE);
301
/* I don't really like these *_ctrl functions very much to be perfectly
302
* honest. For one thing, I think I have to return a negative value for
303
* any error because possible DSO_ctrl() commands may return values
304
* such as "size"s that can legitimately be zero (making the standard
305
* "if(DSO_cmd(...))" form that works almost everywhere else fail at
306
* odd times. I'd prefer "output" values to be passed by reference and
307
* the return value as success/failure like usual ... but we conform
308
* when we must... :-) */
309
long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
313
DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);
316
/* We should intercept certain generic commands and only pass control
317
* to the method-specific ctrl() function if it's something we don't
321
case DSO_CTRL_GET_FLAGS:
323
case DSO_CTRL_SET_FLAGS:
324
dso->flags = (int)larg;
326
case DSO_CTRL_OR_FLAGS:
327
dso->flags |= (int)larg;
332
if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL))
334
DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);
337
return(dso->meth->dso_ctrl(dso,cmd,larg,parg));
340
int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
341
DSO_NAME_CONVERTER_FUNC *oldcb)
345
DSOerr(DSO_F_DSO_SET_NAME_CONVERTER,
346
ERR_R_PASSED_NULL_PARAMETER);
350
*oldcb = dso->name_converter;
351
dso->name_converter = cb;
355
const char *DSO_get_filename(DSO *dso)
359
DSOerr(DSO_F_DSO_GET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
362
return(dso->filename);
365
int DSO_set_filename(DSO *dso, const char *filename)
369
if((dso == NULL) || (filename == NULL))
371
DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
374
if(dso->loaded_filename)
376
DSOerr(DSO_F_DSO_SET_FILENAME,DSO_R_DSO_ALREADY_LOADED);
379
/* We'll duplicate filename */
380
copied = OPENSSL_malloc(strlen(filename) + 1);
383
DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_MALLOC_FAILURE);
386
BUF_strlcpy(copied, filename, strlen(filename) + 1);
388
OPENSSL_free(dso->filename);
389
dso->filename = copied;
393
char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
397
if(dso == NULL || filespec1 == NULL)
399
DSOerr(DSO_F_DSO_MERGE,ERR_R_PASSED_NULL_PARAMETER);
402
if(filespec1 == NULL)
403
filespec1 = dso->filename;
404
if(filespec1 == NULL)
406
DSOerr(DSO_F_DSO_MERGE,DSO_R_NO_FILE_SPECIFICATION);
409
if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0)
411
if(dso->merger != NULL)
412
result = dso->merger(dso, filespec1, filespec2);
413
else if(dso->meth->dso_merger != NULL)
414
result = dso->meth->dso_merger(dso,
415
filespec1, filespec2);
420
char *DSO_convert_filename(DSO *dso, const char *filename)
426
DSOerr(DSO_F_DSO_CONVERT_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
430
filename = dso->filename;
433
DSOerr(DSO_F_DSO_CONVERT_FILENAME,DSO_R_NO_FILENAME);
436
if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0)
438
if(dso->name_converter != NULL)
439
result = dso->name_converter(dso, filename);
440
else if(dso->meth->dso_name_converter != NULL)
441
result = dso->meth->dso_name_converter(dso, filename);
445
result = OPENSSL_malloc(strlen(filename) + 1);
448
DSOerr(DSO_F_DSO_CONVERT_FILENAME,
449
ERR_R_MALLOC_FAILURE);
452
BUF_strlcpy(result, filename, strlen(filename) + 1);
457
const char *DSO_get_loaded_filename(DSO *dso)
461
DSOerr(DSO_F_DSO_GET_LOADED_FILENAME,
462
ERR_R_PASSED_NULL_PARAMETER);
465
return(dso->loaded_filename);