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Commit | Line | Data |
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0f113f3e | 1 | /* |
22e27978 | 2 | * Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved. |
bc37d996 | 3 | * |
2044d382 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
bc37d996 DSH |
8 | */ |
9 | ||
07016a8a | 10 | #include "internal/cryptlib.h" |
bc37d996 | 11 | #include <stdio.h> |
df5eaa8a | 12 | #include <ctype.h> |
bc37d996 | 13 | #include <openssl/crypto.h> |
cbf6959f | 14 | #include "internal/conf.h" |
921de151 | 15 | #include "internal/dso.h" |
22e27978 | 16 | #include "internal/thread_once.h" |
bc37d996 | 17 | #include <openssl/x509.h> |
0196ad63 | 18 | #include <openssl/trace.h> |
22e27978 | 19 | #include <openssl/engine.h> |
bc37d996 | 20 | |
852c2ed2 RS |
21 | DEFINE_STACK_OF(CONF_VALUE) |
22 | DEFINE_STACK_OF(CONF_MODULE) | |
23 | DEFINE_STACK_OF(CONF_IMODULE) | |
24 | ||
bc37d996 DSH |
25 | #define DSO_mod_init_name "OPENSSL_init" |
26 | #define DSO_mod_finish_name "OPENSSL_finish" | |
27 | ||
0f113f3e MC |
28 | /* |
29 | * This structure contains a data about supported modules. entries in this | |
30 | * table correspond to either dynamic or static modules. | |
bc37d996 DSH |
31 | */ |
32 | ||
0f113f3e MC |
33 | struct conf_module_st { |
34 | /* DSO of this module or NULL if static */ | |
35 | DSO *dso; | |
36 | /* Name of the module */ | |
37 | char *name; | |
38 | /* Init function */ | |
39 | conf_init_func *init; | |
40 | /* Finish function */ | |
41 | conf_finish_func *finish; | |
42 | /* Number of successfully initialized modules */ | |
43 | int links; | |
44 | void *usr_data; | |
45 | }; | |
46 | ||
47 | /* | |
48 | * This structure contains information about modules that have been | |
49 | * successfully initialized. There may be more than one entry for a given | |
50 | * module. | |
bc37d996 DSH |
51 | */ |
52 | ||
0f113f3e MC |
53 | struct conf_imodule_st { |
54 | CONF_MODULE *pmod; | |
55 | char *name; | |
56 | char *value; | |
57 | unsigned long flags; | |
58 | void *usr_data; | |
59 | }; | |
bc37d996 DSH |
60 | |
61 | static STACK_OF(CONF_MODULE) *supported_modules = NULL; | |
62 | static STACK_OF(CONF_IMODULE) *initialized_modules = NULL; | |
63 | ||
22e27978 SL |
64 | static CRYPTO_ONCE load_builtin_modules = CRYPTO_ONCE_STATIC_INIT; |
65 | ||
bc37d996 DSH |
66 | static void module_free(CONF_MODULE *md); |
67 | static void module_finish(CONF_IMODULE *imod); | |
159b9a4d | 68 | static int module_run(const CONF *cnf, const char *name, const char *value, |
0f113f3e | 69 | unsigned long flags); |
cca28b29 | 70 | static CONF_MODULE *module_add(DSO *dso, const char *name, |
0f113f3e MC |
71 | conf_init_func *ifunc, |
72 | conf_finish_func *ffunc); | |
159b9a4d F |
73 | static CONF_MODULE *module_find(const char *name); |
74 | static int module_init(CONF_MODULE *pmod, const char *name, const char *value, | |
0f113f3e | 75 | const CONF *cnf); |
02e112a8 | 76 | static CONF_MODULE *module_load_dso(const CONF *cnf, const char *name, |
159b9a4d | 77 | const char *value); |
bc37d996 DSH |
78 | |
79 | /* Main function: load modules from a CONF structure */ | |
80 | ||
9dd5ae65 | 81 | int CONF_modules_load(const CONF *cnf, const char *appname, |
0f113f3e MC |
82 | unsigned long flags) |
83 | { | |
84 | STACK_OF(CONF_VALUE) *values; | |
85 | CONF_VALUE *vl; | |
86 | char *vsection = NULL; | |
bc37d996 | 87 | |
0f113f3e | 88 | int ret, i; |
bc37d996 | 89 | |
0f113f3e MC |
90 | if (!cnf) |
91 | return 1; | |
bc37d996 | 92 | |
0f113f3e MC |
93 | if (appname) |
94 | vsection = NCONF_get_string(cnf, NULL, appname); | |
bc37d996 | 95 | |
0f113f3e MC |
96 | if (!appname || (!vsection && (flags & CONF_MFLAGS_DEFAULT_SECTION))) |
97 | vsection = NCONF_get_string(cnf, NULL, "openssl_conf"); | |
bc37d996 | 98 | |
0f113f3e MC |
99 | if (!vsection) { |
100 | ERR_clear_error(); | |
101 | return 1; | |
102 | } | |
bc37d996 | 103 | |
0196ad63 | 104 | OSSL_TRACE1(CONF, "Configuration in section %s\n", vsection); |
0f113f3e | 105 | values = NCONF_get_section(cnf, vsection); |
bc37d996 | 106 | |
0f113f3e MC |
107 | if (!values) |
108 | return 0; | |
bc37d996 | 109 | |
0f113f3e MC |
110 | for (i = 0; i < sk_CONF_VALUE_num(values); i++) { |
111 | vl = sk_CONF_VALUE_value(values, i); | |
112 | ret = module_run(cnf, vl->name, vl->value, flags); | |
0196ad63 RL |
113 | OSSL_TRACE3(CONF, "Running module %s (%s) returned %d\n", |
114 | vl->name, vl->value, ret); | |
0f113f3e MC |
115 | if (ret <= 0) |
116 | if (!(flags & CONF_MFLAGS_IGNORE_ERRORS)) | |
117 | return ret; | |
118 | } | |
bc37d996 | 119 | |
0f113f3e | 120 | return 1; |
bc37d996 | 121 | |
0f113f3e | 122 | } |
bc37d996 | 123 | |
22e27978 SL |
124 | int CONF_modules_load_file_with_libctx(OPENSSL_CTX *libctx, |
125 | const char *filename, | |
126 | const char *appname, unsigned long flags) | |
0f113f3e MC |
127 | { |
128 | char *file = NULL; | |
129 | CONF *conf = NULL; | |
130 | int ret = 0; | |
22e27978 SL |
131 | |
132 | conf = NCONF_new_with_libctx(libctx, NULL); | |
90945fa3 | 133 | if (conf == NULL) |
0f113f3e MC |
134 | goto err; |
135 | ||
136 | if (filename == NULL) { | |
137 | file = CONF_get1_default_config_file(); | |
22e27978 | 138 | if (file == NULL) |
0f113f3e | 139 | goto err; |
22e27978 | 140 | } else { |
0f113f3e | 141 | file = (char *)filename; |
22e27978 | 142 | } |
0f113f3e MC |
143 | |
144 | if (NCONF_load(conf, file, NULL) <= 0) { | |
145 | if ((flags & CONF_MFLAGS_IGNORE_MISSING_FILE) && | |
146 | (ERR_GET_REASON(ERR_peek_last_error()) == CONF_R_NO_SUCH_FILE)) { | |
147 | ERR_clear_error(); | |
148 | ret = 1; | |
149 | } | |
150 | goto err; | |
151 | } | |
152 | ||
153 | ret = CONF_modules_load(conf, appname, flags); | |
154 | ||
155 | err: | |
156 | if (filename == NULL) | |
157 | OPENSSL_free(file); | |
158 | NCONF_free(conf); | |
159 | ||
df1f538f VD |
160 | if (flags & CONF_MFLAGS_IGNORE_RETURN_CODES) |
161 | return 1; | |
162 | ||
0f113f3e MC |
163 | return ret; |
164 | } | |
bc37d996 | 165 | |
22e27978 SL |
166 | int CONF_modules_load_file(const char *filename, |
167 | const char *appname, unsigned long flags) | |
168 | { | |
169 | return CONF_modules_load_file_with_libctx(NULL, filename, appname, flags); | |
170 | } | |
171 | ||
172 | DEFINE_RUN_ONCE_STATIC(do_load_builtin_modules) | |
173 | { | |
174 | OPENSSL_load_builtin_modules(); | |
175 | #ifndef OPENSSL_NO_ENGINE | |
176 | /* Need to load ENGINEs */ | |
177 | ENGINE_load_builtin_engines(); | |
178 | #endif | |
179 | ERR_clear_error(); | |
180 | return 1; | |
181 | } | |
182 | ||
159b9a4d | 183 | static int module_run(const CONF *cnf, const char *name, const char *value, |
0f113f3e MC |
184 | unsigned long flags) |
185 | { | |
186 | CONF_MODULE *md; | |
187 | int ret; | |
188 | ||
22e27978 SL |
189 | if (!RUN_ONCE(&load_builtin_modules, do_load_builtin_modules)) |
190 | return -1; | |
191 | ||
0f113f3e MC |
192 | md = module_find(name); |
193 | ||
194 | /* Module not found: try to load DSO */ | |
195 | if (!md && !(flags & CONF_MFLAGS_NO_DSO)) | |
a773b52a | 196 | md = module_load_dso(cnf, name, value); |
0f113f3e MC |
197 | |
198 | if (!md) { | |
199 | if (!(flags & CONF_MFLAGS_SILENT)) { | |
200 | CONFerr(CONF_F_MODULE_RUN, CONF_R_UNKNOWN_MODULE_NAME); | |
201 | ERR_add_error_data(2, "module=", name); | |
202 | } | |
203 | return -1; | |
204 | } | |
205 | ||
206 | ret = module_init(md, name, value, cnf); | |
207 | ||
208 | if (ret <= 0) { | |
209 | if (!(flags & CONF_MFLAGS_SILENT)) { | |
210 | char rcode[DECIMAL_SIZE(ret) + 1]; | |
a2371fa9 | 211 | |
0f113f3e | 212 | CONFerr(CONF_F_MODULE_RUN, CONF_R_MODULE_INITIALIZATION_ERROR); |
a2371fa9 | 213 | BIO_snprintf(rcode, sizeof(rcode), "%-8d", ret); |
0f113f3e MC |
214 | ERR_add_error_data(6, "module=", name, ", value=", value, |
215 | ", retcode=", rcode); | |
216 | } | |
217 | } | |
218 | ||
219 | return ret; | |
220 | } | |
bc37d996 DSH |
221 | |
222 | /* Load a module from a DSO */ | |
02e112a8 | 223 | static CONF_MODULE *module_load_dso(const CONF *cnf, |
159b9a4d | 224 | const char *name, const char *value) |
0f113f3e MC |
225 | { |
226 | DSO *dso = NULL; | |
227 | conf_init_func *ifunc; | |
228 | conf_finish_func *ffunc; | |
159b9a4d | 229 | const char *path = NULL; |
0f113f3e MC |
230 | int errcode = 0; |
231 | CONF_MODULE *md; | |
12a765a5 | 232 | |
0f113f3e MC |
233 | /* Look for alternative path in module section */ |
234 | path = NCONF_get_string(cnf, value, "path"); | |
12a765a5 | 235 | if (path == NULL) { |
0f113f3e MC |
236 | ERR_clear_error(); |
237 | path = name; | |
238 | } | |
239 | dso = DSO_load(NULL, path, NULL, 0); | |
12a765a5 | 240 | if (dso == NULL) { |
0f113f3e MC |
241 | errcode = CONF_R_ERROR_LOADING_DSO; |
242 | goto err; | |
243 | } | |
244 | ifunc = (conf_init_func *)DSO_bind_func(dso, DSO_mod_init_name); | |
12a765a5 | 245 | if (ifunc == NULL) { |
0f113f3e MC |
246 | errcode = CONF_R_MISSING_INIT_FUNCTION; |
247 | goto err; | |
248 | } | |
249 | ffunc = (conf_finish_func *)DSO_bind_func(dso, DSO_mod_finish_name); | |
250 | /* All OK, add module */ | |
251 | md = module_add(dso, name, ifunc, ffunc); | |
252 | ||
12a765a5 | 253 | if (md == NULL) |
0f113f3e MC |
254 | goto err; |
255 | ||
256 | return md; | |
257 | ||
258 | err: | |
efa7dd64 | 259 | DSO_free(dso); |
0f113f3e MC |
260 | CONFerr(CONF_F_MODULE_LOAD_DSO, errcode); |
261 | ERR_add_error_data(4, "module=", name, ", path=", path); | |
262 | return NULL; | |
263 | } | |
bc37d996 DSH |
264 | |
265 | /* add module to list */ | |
cca28b29 | 266 | static CONF_MODULE *module_add(DSO *dso, const char *name, |
0f113f3e MC |
267 | conf_init_func *ifunc, conf_finish_func *ffunc) |
268 | { | |
269 | CONF_MODULE *tmod = NULL; | |
270 | if (supported_modules == NULL) | |
271 | supported_modules = sk_CONF_MODULE_new_null(); | |
272 | if (supported_modules == NULL) | |
273 | return NULL; | |
cdb10bae RS |
274 | if ((tmod = OPENSSL_zalloc(sizeof(*tmod))) == NULL) { |
275 | CONFerr(CONF_F_MODULE_ADD, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 276 | return NULL; |
cdb10bae | 277 | } |
0f113f3e MC |
278 | |
279 | tmod->dso = dso; | |
7644a9ae | 280 | tmod->name = OPENSSL_strdup(name); |
0f113f3e MC |
281 | tmod->init = ifunc; |
282 | tmod->finish = ffunc; | |
b7b8e948 DM |
283 | if (tmod->name == NULL) { |
284 | OPENSSL_free(tmod); | |
285 | return NULL; | |
286 | } | |
0f113f3e MC |
287 | |
288 | if (!sk_CONF_MODULE_push(supported_modules, tmod)) { | |
b7b8e948 | 289 | OPENSSL_free(tmod->name); |
0f113f3e MC |
290 | OPENSSL_free(tmod); |
291 | return NULL; | |
292 | } | |
293 | ||
294 | return tmod; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Find a module from the list. We allow module names of the form | |
299 | * modname.XXXX to just search for modname to allow the same module to be | |
300 | * initialized more than once. | |
bc37d996 DSH |
301 | */ |
302 | ||
159b9a4d | 303 | static CONF_MODULE *module_find(const char *name) |
0f113f3e MC |
304 | { |
305 | CONF_MODULE *tmod; | |
306 | int i, nchar; | |
307 | char *p; | |
308 | p = strrchr(name, '.'); | |
bc37d996 | 309 | |
0f113f3e MC |
310 | if (p) |
311 | nchar = p - name; | |
312 | else | |
313 | nchar = strlen(name); | |
bc37d996 | 314 | |
0f113f3e MC |
315 | for (i = 0; i < sk_CONF_MODULE_num(supported_modules); i++) { |
316 | tmod = sk_CONF_MODULE_value(supported_modules, i); | |
86885c28 | 317 | if (strncmp(tmod->name, name, nchar) == 0) |
0f113f3e MC |
318 | return tmod; |
319 | } | |
bc37d996 | 320 | |
0f113f3e | 321 | return NULL; |
bc37d996 | 322 | |
0f113f3e | 323 | } |
bc37d996 DSH |
324 | |
325 | /* initialize a module */ | |
159b9a4d | 326 | static int module_init(CONF_MODULE *pmod, const char *name, const char *value, |
0f113f3e MC |
327 | const CONF *cnf) |
328 | { | |
329 | int ret = 1; | |
330 | int init_called = 0; | |
331 | CONF_IMODULE *imod = NULL; | |
332 | ||
333 | /* Otherwise add initialized module to list */ | |
b4faea50 | 334 | imod = OPENSSL_malloc(sizeof(*imod)); |
90945fa3 | 335 | if (imod == NULL) |
0f113f3e MC |
336 | goto err; |
337 | ||
338 | imod->pmod = pmod; | |
7644a9ae RS |
339 | imod->name = OPENSSL_strdup(name); |
340 | imod->value = OPENSSL_strdup(value); | |
0f113f3e MC |
341 | imod->usr_data = NULL; |
342 | ||
343 | if (!imod->name || !imod->value) | |
344 | goto memerr; | |
345 | ||
346 | /* Try to initialize module */ | |
347 | if (pmod->init) { | |
348 | ret = pmod->init(imod, cnf); | |
349 | init_called = 1; | |
350 | /* Error occurred, exit */ | |
351 | if (ret <= 0) | |
352 | goto err; | |
353 | } | |
354 | ||
355 | if (initialized_modules == NULL) { | |
356 | initialized_modules = sk_CONF_IMODULE_new_null(); | |
357 | if (!initialized_modules) { | |
358 | CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE); | |
359 | goto err; | |
360 | } | |
361 | } | |
362 | ||
363 | if (!sk_CONF_IMODULE_push(initialized_modules, imod)) { | |
364 | CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE); | |
365 | goto err; | |
366 | } | |
367 | ||
368 | pmod->links++; | |
369 | ||
370 | return ret; | |
371 | ||
372 | err: | |
373 | ||
374 | /* We've started the module so we'd better finish it */ | |
375 | if (pmod->finish && init_called) | |
376 | pmod->finish(imod); | |
377 | ||
378 | memerr: | |
379 | if (imod) { | |
b548a1f1 RS |
380 | OPENSSL_free(imod->name); |
381 | OPENSSL_free(imod->value); | |
0f113f3e MC |
382 | OPENSSL_free(imod); |
383 | } | |
384 | ||
385 | return -1; | |
386 | ||
387 | } | |
388 | ||
389 | /* | |
390 | * Unload any dynamic modules that have a link count of zero: i.e. have no | |
391 | * active initialized modules. If 'all' is set then all modules are unloaded | |
392 | * including static ones. | |
bc37d996 DSH |
393 | */ |
394 | ||
395 | void CONF_modules_unload(int all) | |
0f113f3e MC |
396 | { |
397 | int i; | |
398 | CONF_MODULE *md; | |
399 | CONF_modules_finish(); | |
400 | /* unload modules in reverse order */ | |
401 | for (i = sk_CONF_MODULE_num(supported_modules) - 1; i >= 0; i--) { | |
402 | md = sk_CONF_MODULE_value(supported_modules, i); | |
403 | /* If static or in use and 'all' not set ignore it */ | |
404 | if (((md->links > 0) || !md->dso) && !all) | |
405 | continue; | |
406 | /* Since we're working in reverse this is OK */ | |
407 | (void)sk_CONF_MODULE_delete(supported_modules, i); | |
408 | module_free(md); | |
409 | } | |
410 | if (sk_CONF_MODULE_num(supported_modules) == 0) { | |
411 | sk_CONF_MODULE_free(supported_modules); | |
412 | supported_modules = NULL; | |
413 | } | |
414 | } | |
bc37d996 DSH |
415 | |
416 | /* unload a single module */ | |
417 | static void module_free(CONF_MODULE *md) | |
0f113f3e | 418 | { |
efa7dd64 | 419 | DSO_free(md->dso); |
0f113f3e MC |
420 | OPENSSL_free(md->name); |
421 | OPENSSL_free(md); | |
422 | } | |
bc37d996 DSH |
423 | |
424 | /* finish and free up all modules instances */ | |
425 | ||
426 | void CONF_modules_finish(void) | |
0f113f3e MC |
427 | { |
428 | CONF_IMODULE *imod; | |
429 | while (sk_CONF_IMODULE_num(initialized_modules) > 0) { | |
430 | imod = sk_CONF_IMODULE_pop(initialized_modules); | |
431 | module_finish(imod); | |
432 | } | |
433 | sk_CONF_IMODULE_free(initialized_modules); | |
434 | initialized_modules = NULL; | |
435 | } | |
bc37d996 DSH |
436 | |
437 | /* finish a module instance */ | |
438 | ||
439 | static void module_finish(CONF_IMODULE *imod) | |
0f113f3e | 440 | { |
efa7dd64 RS |
441 | if (!imod) |
442 | return; | |
0f113f3e MC |
443 | if (imod->pmod->finish) |
444 | imod->pmod->finish(imod); | |
445 | imod->pmod->links--; | |
446 | OPENSSL_free(imod->name); | |
447 | OPENSSL_free(imod->value); | |
448 | OPENSSL_free(imod); | |
449 | } | |
bc37d996 DSH |
450 | |
451 | /* Add a static module to OpenSSL */ | |
452 | ||
0f113f3e MC |
453 | int CONF_module_add(const char *name, conf_init_func *ifunc, |
454 | conf_finish_func *ffunc) | |
455 | { | |
456 | if (module_add(NULL, name, ifunc, ffunc)) | |
457 | return 1; | |
458 | else | |
459 | return 0; | |
460 | } | |
bc37d996 | 461 | |
b3599dbb | 462 | void conf_modules_free_int(void) |
0f113f3e MC |
463 | { |
464 | CONF_modules_finish(); | |
465 | CONF_modules_unload(1); | |
466 | } | |
bc37d996 DSH |
467 | |
468 | /* Utility functions */ | |
469 | ||
9dd5ae65 | 470 | const char *CONF_imodule_get_name(const CONF_IMODULE *md) |
0f113f3e MC |
471 | { |
472 | return md->name; | |
473 | } | |
bc37d996 | 474 | |
9dd5ae65 | 475 | const char *CONF_imodule_get_value(const CONF_IMODULE *md) |
0f113f3e MC |
476 | { |
477 | return md->value; | |
478 | } | |
bc37d996 | 479 | |
9dd5ae65 | 480 | void *CONF_imodule_get_usr_data(const CONF_IMODULE *md) |
0f113f3e MC |
481 | { |
482 | return md->usr_data; | |
483 | } | |
bc37d996 DSH |
484 | |
485 | void CONF_imodule_set_usr_data(CONF_IMODULE *md, void *usr_data) | |
0f113f3e MC |
486 | { |
487 | md->usr_data = usr_data; | |
488 | } | |
bc37d996 | 489 | |
9dd5ae65 | 490 | CONF_MODULE *CONF_imodule_get_module(const CONF_IMODULE *md) |
0f113f3e MC |
491 | { |
492 | return md->pmod; | |
493 | } | |
bc37d996 | 494 | |
9dd5ae65 | 495 | unsigned long CONF_imodule_get_flags(const CONF_IMODULE *md) |
0f113f3e MC |
496 | { |
497 | return md->flags; | |
498 | } | |
bc37d996 DSH |
499 | |
500 | void CONF_imodule_set_flags(CONF_IMODULE *md, unsigned long flags) | |
0f113f3e MC |
501 | { |
502 | md->flags = flags; | |
503 | } | |
bc37d996 DSH |
504 | |
505 | void *CONF_module_get_usr_data(CONF_MODULE *pmod) | |
0f113f3e MC |
506 | { |
507 | return pmod->usr_data; | |
508 | } | |
bc37d996 DSH |
509 | |
510 | void CONF_module_set_usr_data(CONF_MODULE *pmod, void *usr_data) | |
0f113f3e MC |
511 | { |
512 | pmod->usr_data = usr_data; | |
513 | } | |
bc37d996 | 514 | |
c9501c22 DSH |
515 | /* Return default config file name */ |
516 | ||
517 | char *CONF_get1_default_config_file(void) | |
0f113f3e | 518 | { |
a2371fa9 | 519 | char *file, *sep = ""; |
0f113f3e | 520 | int len; |
c9501c22 | 521 | |
5c39a55d P |
522 | if ((file = ossl_safe_getenv("OPENSSL_CONF")) != NULL) |
523 | return OPENSSL_strdup(file); | |
c9501c22 | 524 | |
0f113f3e | 525 | len = strlen(X509_get_default_cert_area()); |
c9501c22 | 526 | #ifndef OPENSSL_SYS_VMS |
0f113f3e | 527 | len++; |
a2371fa9 | 528 | sep = "/"; |
c9501c22 | 529 | #endif |
0f113f3e | 530 | len += strlen(OPENSSL_CONF); |
c9501c22 | 531 | |
0f113f3e | 532 | file = OPENSSL_malloc(len + 1); |
c9501c22 | 533 | |
90945fa3 | 534 | if (file == NULL) |
0f113f3e | 535 | return NULL; |
a2371fa9 P |
536 | BIO_snprintf(file, len + 1, "%s%s%s", X509_get_default_cert_area(), |
537 | sep, OPENSSL_CONF); | |
c9501c22 | 538 | |
0f113f3e MC |
539 | return file; |
540 | } | |
df5eaa8a | 541 | |
0f113f3e MC |
542 | /* |
543 | * This function takes a list separated by 'sep' and calls the callback | |
544 | * function giving the start and length of each member optionally stripping | |
545 | * leading and trailing whitespace. This can be used to parse comma separated | |
546 | * lists for example. | |
df5eaa8a DSH |
547 | */ |
548 | ||
3822740c | 549 | int CONF_parse_list(const char *list_, int sep, int nospc, |
0f113f3e MC |
550 | int (*list_cb) (const char *elem, int len, void *usr), |
551 | void *arg) | |
552 | { | |
553 | int ret; | |
554 | const char *lstart, *tmpend, *p; | |
555 | ||
556 | if (list_ == NULL) { | |
557 | CONFerr(CONF_F_CONF_PARSE_LIST, CONF_R_LIST_CANNOT_BE_NULL); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | lstart = list_; | |
562 | for (;;) { | |
563 | if (nospc) { | |
564 | while (*lstart && isspace((unsigned char)*lstart)) | |
565 | lstart++; | |
566 | } | |
567 | p = strchr(lstart, sep); | |
12a765a5 | 568 | if (p == lstart || *lstart == '\0') |
0f113f3e MC |
569 | ret = list_cb(NULL, 0, arg); |
570 | else { | |
571 | if (p) | |
572 | tmpend = p - 1; | |
573 | else | |
574 | tmpend = lstart + strlen(lstart) - 1; | |
575 | if (nospc) { | |
576 | while (isspace((unsigned char)*tmpend)) | |
577 | tmpend--; | |
578 | } | |
579 | ret = list_cb(lstart, tmpend - lstart + 1, arg); | |
580 | } | |
581 | if (ret <= 0) | |
582 | return ret; | |
583 | if (p == NULL) | |
584 | return 1; | |
585 | lstart = p + 1; | |
586 | } | |
587 | } |