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-rw-r--r--src/lib/libcrypto/conf/conf_mod.c616
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diff --git a/src/lib/libcrypto/conf/conf_mod.c b/src/lib/libcrypto/conf/conf_mod.c
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1/* conf_mod.c */
2/* Written by Stephen Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 2001.
4 */
5/* ====================================================================
6 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
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).
56 *
57 */
58
59#include <stdio.h>
60#include <ctype.h>
61#include <openssl/crypto.h>
62#include "cryptlib.h"
63#include <openssl/conf.h>
64#include <openssl/dso.h>
65#include <openssl/x509.h>
66
67
68#define DSO_mod_init_name "OPENSSL_init"
69#define DSO_mod_finish_name "OPENSSL_finish"
70
71
72/* This structure contains a data about supported modules.
73 * entries in this table correspond to either dynamic or
74 * static modules.
75 */
76
77struct conf_module_st
78 {
79 /* DSO of this module or NULL if static */
80 DSO *dso;
81 /* Name of the module */
82 char *name;
83 /* Init function */
84 conf_init_func *init;
85 /* Finish function */
86 conf_finish_func *finish;
87 /* Number of successfully initialized modules */
88 int links;
89 void *usr_data;
90 };
91
92
93/* This structure contains information about modules that have been
94 * successfully initialized. There may be more than one entry for a
95 * given module.
96 */
97
98struct conf_imodule_st
99 {
100 CONF_MODULE *pmod;
101 char *name;
102 char *value;
103 unsigned long flags;
104 void *usr_data;
105 };
106
107static STACK_OF(CONF_MODULE) *supported_modules = NULL;
108static STACK_OF(CONF_IMODULE) *initialized_modules = NULL;
109
110static void module_free(CONF_MODULE *md);
111static void module_finish(CONF_IMODULE *imod);
112static int module_run(const CONF *cnf, char *name, char *value,
113 unsigned long flags);
114static CONF_MODULE *module_add(DSO *dso, const char *name,
115 conf_init_func *ifunc, conf_finish_func *ffunc);
116static CONF_MODULE *module_find(char *name);
117static int module_init(CONF_MODULE *pmod, char *name, char *value,
118 const CONF *cnf);
119static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value,
120 unsigned long flags);
121
122/* Main function: load modules from a CONF structure */
123
124int CONF_modules_load(const CONF *cnf, const char *appname,
125 unsigned long flags)
126 {
127 STACK_OF(CONF_VALUE) *values;
128 CONF_VALUE *vl;
129 char *vsection;
130
131 int ret, i;
132
133 if (!cnf)
134 return 1;
135
136 if (appname == NULL)
137 appname = "openssl_conf";
138
139 vsection = NCONF_get_string(cnf, NULL, appname);
140
141 if (!vsection)
142 {
143 ERR_clear_error();
144 return 1;
145 }
146
147 values = NCONF_get_section(cnf, vsection);
148
149 if (!values)
150 return 0;
151
152 for (i = 0; i < sk_CONF_VALUE_num(values); i++)
153 {
154 vl = sk_CONF_VALUE_value(values, i);
155 ret = module_run(cnf, vl->name, vl->value, flags);
156 if (ret <= 0)
157 if(!(flags & CONF_MFLAGS_IGNORE_ERRORS))
158 return ret;
159 }
160
161 return 1;
162
163 }
164
165int CONF_modules_load_file(const char *filename, const char *appname,
166 unsigned long flags)
167 {
168 char *file = NULL;
169 CONF *conf = NULL;
170 int ret = 0;
171 conf = NCONF_new(NULL);
172 if (!conf)
173 goto err;
174
175 if (filename == NULL)
176 {
177 file = CONF_get1_default_config_file();
178 if (!file)
179 goto err;
180 }
181 else
182 file = (char *)filename;
183
184 if (NCONF_load(conf, file, NULL) <= 0)
185 {
186 if ((flags & CONF_MFLAGS_IGNORE_MISSING_FILE) &&
187 (ERR_GET_REASON(ERR_peek_last_error()) == CONF_R_NO_SUCH_FILE))
188 {
189 ERR_clear_error();
190 ret = 1;
191 }
192 goto err;
193 }
194
195 ret = CONF_modules_load(conf, appname, flags);
196
197 err:
198 if (filename == NULL)
199 OPENSSL_free(file);
200 NCONF_free(conf);
201
202 return ret;
203 }
204
205static int module_run(const CONF *cnf, char *name, char *value,
206 unsigned long flags)
207 {
208 CONF_MODULE *md;
209 int ret;
210
211 md = module_find(name);
212
213 /* Module not found: try to load DSO */
214 if (!md && !(flags & CONF_MFLAGS_NO_DSO))
215 md = module_load_dso(cnf, name, value, flags);
216
217 if (!md)
218 {
219 if (!(flags & CONF_MFLAGS_SILENT))
220 {
221 CONFerr(CONF_F_MODULE_RUN, CONF_R_UNKNOWN_MODULE_NAME);
222 ERR_add_error_data(2, "module=", name);
223 }
224 return -1;
225 }
226
227 ret = module_init(md, name, value, cnf);
228
229 if (ret <= 0)
230 {
231 if (!(flags & CONF_MFLAGS_SILENT))
232 {
233 char rcode[DECIMAL_SIZE(ret)+1];
234 CONFerr(CONF_F_CONF_MODULES_LOAD, CONF_R_MODULE_INITIALIZATION_ERROR);
235 BIO_snprintf(rcode, sizeof rcode, "%-8d", ret);
236 ERR_add_error_data(6, "module=", name, ", value=", value, ", retcode=", rcode);
237 }
238 }
239
240 return ret;
241 }
242
243/* Load a module from a DSO */
244static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value,
245 unsigned long flags)
246 {
247 DSO *dso = NULL;
248 conf_init_func *ifunc;
249 conf_finish_func *ffunc;
250 char *path = NULL;
251 int errcode = 0;
252 CONF_MODULE *md;
253 /* Look for alternative path in module section */
254 path = NCONF_get_string(cnf, value, "path");
255 if (!path)
256 {
257 ERR_get_error();
258 path = name;
259 }
260 dso = DSO_load(NULL, path, NULL, 0);
261 if (!dso)
262 {
263 errcode = CONF_R_ERROR_LOADING_DSO;
264 goto err;
265 }
266 ifunc = (conf_init_func *)DSO_bind_func(dso, DSO_mod_init_name);
267 if (!ifunc)
268 {
269 errcode = CONF_R_MISSING_INIT_FUNCTION;
270 goto err;
271 }
272 ffunc = (conf_finish_func *)DSO_bind_func(dso, DSO_mod_finish_name);
273 /* All OK, add module */
274 md = module_add(dso, name, ifunc, ffunc);
275
276 if (!md)
277 goto err;
278
279 return md;
280
281 err:
282 if (dso)
283 DSO_free(dso);
284 CONFerr(CONF_F_MODULE_LOAD_DSO, errcode);
285 ERR_add_error_data(4, "module=", name, ", path=", path);
286 return NULL;
287 }
288
289/* add module to list */
290static CONF_MODULE *module_add(DSO *dso, const char *name,
291 conf_init_func *ifunc, conf_finish_func *ffunc)
292 {
293 CONF_MODULE *tmod = NULL;
294 if (supported_modules == NULL)
295 supported_modules = sk_CONF_MODULE_new_null();
296 if (supported_modules == NULL)
297 return NULL;
298 tmod = OPENSSL_malloc(sizeof(CONF_MODULE));
299 if (tmod == NULL)
300 return NULL;
301
302 tmod->dso = dso;
303 tmod->name = BUF_strdup(name);
304 tmod->init = ifunc;
305 tmod->finish = ffunc;
306 tmod->links = 0;
307
308 if (!sk_CONF_MODULE_push(supported_modules, tmod))
309 {
310 OPENSSL_free(tmod);
311 return NULL;
312 }
313
314 return tmod;
315 }
316
317/* Find a module from the list. We allow module names of the
318 * form modname.XXXX to just search for modname to allow the
319 * same module to be initialized more than once.
320 */
321
322static CONF_MODULE *module_find(char *name)
323 {
324 CONF_MODULE *tmod;
325 int i, nchar;
326 char *p;
327 p = strrchr(name, '.');
328
329 if (p)
330 nchar = p - name;
331 else
332 nchar = strlen(name);
333
334 for (i = 0; i < sk_CONF_MODULE_num(supported_modules); i++)
335 {
336 tmod = sk_CONF_MODULE_value(supported_modules, i);
337 if (!strncmp(tmod->name, name, nchar))
338 return tmod;
339 }
340
341 return NULL;
342
343 }
344
345/* initialize a module */
346static int module_init(CONF_MODULE *pmod, char *name, char *value,
347 const CONF *cnf)
348 {
349 int ret = 1;
350 int init_called = 0;
351 CONF_IMODULE *imod = NULL;
352
353 /* Otherwise add initialized module to list */
354 imod = OPENSSL_malloc(sizeof(CONF_IMODULE));
355 if (!imod)
356 goto err;
357
358 imod->pmod = pmod;
359 imod->name = BUF_strdup(name);
360 imod->value = BUF_strdup(value);
361 imod->usr_data = NULL;
362
363 if (!imod->name || !imod->value)
364 goto memerr;
365
366 /* Try to initialize module */
367 if(pmod->init)
368 {
369 ret = pmod->init(imod, cnf);
370 init_called = 1;
371 /* Error occurred, exit */
372 if (ret <= 0)
373 goto err;
374 }
375
376 if (initialized_modules == NULL)
377 {
378 initialized_modules = sk_CONF_IMODULE_new_null();
379 if (!initialized_modules)
380 {
381 CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE);
382 goto err;
383 }
384 }
385
386 if (!sk_CONF_IMODULE_push(initialized_modules, imod))
387 {
388 CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE);
389 goto err;
390 }
391
392 pmod->links++;
393
394 return ret;
395
396 err:
397
398 /* We've started the module so we'd better finish it */
399 if (pmod->finish && init_called)
400 pmod->finish(imod);
401
402 memerr:
403 if (imod)
404 {
405 if (imod->name)
406 OPENSSL_free(imod->name);
407 if (imod->value)
408 OPENSSL_free(imod->value);
409 OPENSSL_free(imod);
410 }
411
412 return -1;
413
414 }
415
416/* Unload any dynamic modules that have a link count of zero:
417 * i.e. have no active initialized modules. If 'all' is set
418 * then all modules are unloaded including static ones.
419 */
420
421void CONF_modules_unload(int all)
422 {
423 int i;
424 CONF_MODULE *md;
425 CONF_modules_finish();
426 /* unload modules in reverse order */
427 for (i = sk_CONF_MODULE_num(supported_modules) - 1; i >= 0; i--)
428 {
429 md = sk_CONF_MODULE_value(supported_modules, i);
430 /* If static or in use and 'all' not set ignore it */
431 if (((md->links > 0) || !md->dso) && !all)
432 continue;
433 /* Since we're working in reverse this is OK */
434 sk_CONF_MODULE_delete(supported_modules, i);
435 module_free(md);
436 }
437 if (sk_CONF_MODULE_num(supported_modules) == 0)
438 {
439 sk_CONF_MODULE_free(supported_modules);
440 supported_modules = NULL;
441 }
442 }
443
444/* unload a single module */
445static void module_free(CONF_MODULE *md)
446 {
447 if (md->dso)
448 DSO_free(md->dso);
449 OPENSSL_free(md->name);
450 OPENSSL_free(md);
451 }
452
453/* finish and free up all modules instances */
454
455void CONF_modules_finish(void)
456 {
457 CONF_IMODULE *imod;
458 while (sk_CONF_IMODULE_num(initialized_modules) > 0)
459 {
460 imod = sk_CONF_IMODULE_pop(initialized_modules);
461 module_finish(imod);
462 }
463 sk_CONF_IMODULE_free(initialized_modules);
464 initialized_modules = NULL;
465 }
466
467/* finish a module instance */
468
469static void module_finish(CONF_IMODULE *imod)
470 {
471 if (imod->pmod->finish)
472 imod->pmod->finish(imod);
473 imod->pmod->links--;
474 OPENSSL_free(imod->name);
475 OPENSSL_free(imod->value);
476 OPENSSL_free(imod);
477 }
478
479/* Add a static module to OpenSSL */
480
481int CONF_module_add(const char *name, conf_init_func *ifunc,
482 conf_finish_func *ffunc)
483 {
484 if (module_add(NULL, name, ifunc, ffunc))
485 return 1;
486 else
487 return 0;
488 }
489
490void CONF_modules_free(void)
491 {
492 CONF_modules_finish();
493 CONF_modules_unload(1);
494 }
495
496/* Utility functions */
497
498const char *CONF_imodule_get_name(const CONF_IMODULE *md)
499 {
500 return md->name;
501 }
502
503const char *CONF_imodule_get_value(const CONF_IMODULE *md)
504 {
505 return md->value;
506 }
507
508void *CONF_imodule_get_usr_data(const CONF_IMODULE *md)
509 {
510 return md->usr_data;
511 }
512
513void CONF_imodule_set_usr_data(CONF_IMODULE *md, void *usr_data)
514 {
515 md->usr_data = usr_data;
516 }
517
518CONF_MODULE *CONF_imodule_get_module(const CONF_IMODULE *md)
519 {
520 return md->pmod;
521 }
522
523unsigned long CONF_imodule_get_flags(const CONF_IMODULE *md)
524 {
525 return md->flags;
526 }
527
528void CONF_imodule_set_flags(CONF_IMODULE *md, unsigned long flags)
529 {
530 md->flags = flags;
531 }
532
533void *CONF_module_get_usr_data(CONF_MODULE *pmod)
534 {
535 return pmod->usr_data;
536 }
537
538void CONF_module_set_usr_data(CONF_MODULE *pmod, void *usr_data)
539 {
540 pmod->usr_data = usr_data;
541 }
542
543/* Return default config file name */
544
545char *CONF_get1_default_config_file(void)
546 {
547 char *file;
548 int len;
549
550 file = getenv("OPENSSL_CONF");
551 if (file)
552 return BUF_strdup(file);
553
554 len = strlen(X509_get_default_cert_area());
555#ifndef OPENSSL_SYS_VMS
556 len++;
557#endif
558 len += strlen(OPENSSL_CONF);
559
560 file = OPENSSL_malloc(len + 1);
561
562 if (!file)
563 return NULL;
564 BUF_strlcpy(file,X509_get_default_cert_area(),len + 1);
565#ifndef OPENSSL_SYS_VMS
566 BUF_strlcat(file,"/",len + 1);
567#endif
568 BUF_strlcat(file,OPENSSL_CONF,len + 1);
569
570 return file;
571 }
572
573/* This function takes a list separated by 'sep' and calls the
574 * callback function giving the start and length of each member
575 * optionally stripping leading and trailing whitespace. This can
576 * be used to parse comma separated lists for example.
577 */
578
579int CONF_parse_list(const char *list_, int sep, int nospc,
580 int (*list_cb)(const char *elem, int len, void *usr), void *arg)
581 {
582 int ret;
583 const char *lstart, *tmpend, *p;
584 lstart = list_;
585
586 for(;;)
587 {
588 if (nospc)
589 {
590 while(*lstart && isspace((unsigned char)*lstart))
591 lstart++;
592 }
593 p = strchr(lstart, sep);
594 if (p == lstart || !*lstart)
595 ret = list_cb(NULL, 0, arg);
596 else
597 {
598 if (p)
599 tmpend = p - 1;
600 else
601 tmpend = lstart + strlen(lstart) - 1;
602 if (nospc)
603 {
604 while(isspace((unsigned char)*tmpend))
605 tmpend--;
606 }
607 ret = list_cb(lstart, tmpend - lstart + 1, arg);
608 }
609 if (ret <= 0)
610 return ret;
611 if (p == NULL)
612 return 1;
613 lstart = p + 1;
614 }
615 }
616
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