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Diffstat (limited to 'src/reclaim/reclaim_credential.c')
-rw-r--r-- | src/reclaim/reclaim_credential.c | 1037 |
1 files changed, 1037 insertions, 0 deletions
diff --git a/src/reclaim/reclaim_credential.c b/src/reclaim/reclaim_credential.c new file mode 100644 index 000000000..5c8974400 --- /dev/null +++ b/src/reclaim/reclaim_credential.c | |||
@@ -0,0 +1,1037 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | Copyright (C) 2010-2015 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file reclaim/reclaim_credential.c | ||
23 | * @brief helper library to manage identity attribute credentials | ||
24 | * @author Martin Schanzenbach | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | #include "gnunet_reclaim_plugin.h" | ||
29 | #include "reclaim_credential.h" | ||
30 | |||
31 | |||
32 | /** | ||
33 | * Handle for a plugin | ||
34 | */ | ||
35 | struct Plugin | ||
36 | { | ||
37 | /** | ||
38 | * Name of the plugin | ||
39 | */ | ||
40 | char *library_name; | ||
41 | |||
42 | /** | ||
43 | * Plugin API | ||
44 | */ | ||
45 | struct GNUNET_RECLAIM_CredentialPluginFunctions *api; | ||
46 | }; | ||
47 | |||
48 | |||
49 | /** | ||
50 | * Plugins | ||
51 | */ | ||
52 | static struct Plugin **credential_plugins; | ||
53 | |||
54 | |||
55 | /** | ||
56 | * Number of plugins | ||
57 | */ | ||
58 | static unsigned int num_plugins; | ||
59 | |||
60 | |||
61 | /** | ||
62 | * Init canary | ||
63 | */ | ||
64 | static int initialized; | ||
65 | |||
66 | |||
67 | /** | ||
68 | * Add a plugin | ||
69 | * | ||
70 | * @param cls closure | ||
71 | * @param library_name name of the API library | ||
72 | * @param lib_ret the plugin API pointer | ||
73 | */ | ||
74 | static void | ||
75 | add_plugin (void *cls, const char *library_name, void *lib_ret) | ||
76 | { | ||
77 | struct GNUNET_RECLAIM_CredentialPluginFunctions *api = lib_ret; | ||
78 | struct Plugin *plugin; | ||
79 | |||
80 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
81 | "Loading credential plugin `%s'\n", | ||
82 | library_name); | ||
83 | plugin = GNUNET_new (struct Plugin); | ||
84 | plugin->api = api; | ||
85 | plugin->library_name = GNUNET_strdup (library_name); | ||
86 | GNUNET_array_append (credential_plugins, num_plugins, plugin); | ||
87 | } | ||
88 | |||
89 | |||
90 | /** | ||
91 | * Load plugins | ||
92 | */ | ||
93 | static void | ||
94 | init () | ||
95 | { | ||
96 | if (GNUNET_YES == initialized) | ||
97 | return; | ||
98 | initialized = GNUNET_YES; | ||
99 | GNUNET_PLUGIN_load_all ("libgnunet_plugin_reclaim_credential_", | ||
100 | NULL, | ||
101 | &add_plugin, | ||
102 | NULL); | ||
103 | } | ||
104 | |||
105 | |||
106 | /** | ||
107 | * Convert an credential type name to the corresponding number | ||
108 | * | ||
109 | * @param typename name to convert | ||
110 | * @return corresponding number, UINT32_MAX on error | ||
111 | */ | ||
112 | uint32_t | ||
113 | GNUNET_RECLAIM_credential_typename_to_number (const char *typename) | ||
114 | { | ||
115 | unsigned int i; | ||
116 | struct Plugin *plugin; | ||
117 | uint32_t ret; | ||
118 | init (); | ||
119 | for (i = 0; i < num_plugins; i++) | ||
120 | { | ||
121 | plugin = credential_plugins[i]; | ||
122 | if (UINT32_MAX != | ||
123 | (ret = plugin->api->typename_to_number (plugin->api->cls, | ||
124 | typename))) | ||
125 | return ret; | ||
126 | } | ||
127 | return UINT32_MAX; | ||
128 | } | ||
129 | |||
130 | |||
131 | /** | ||
132 | * Convert an credential type number to the corresponding credential type string | ||
133 | * | ||
134 | * @param type number of a type | ||
135 | * @return corresponding typestring, NULL on error | ||
136 | */ | ||
137 | const char * | ||
138 | GNUNET_RECLAIM_credential_number_to_typename (uint32_t type) | ||
139 | { | ||
140 | unsigned int i; | ||
141 | struct Plugin *plugin; | ||
142 | const char *ret; | ||
143 | |||
144 | init (); | ||
145 | for (i = 0; i < num_plugins; i++) | ||
146 | { | ||
147 | plugin = credential_plugins[i]; | ||
148 | if (NULL != | ||
149 | (ret = plugin->api->number_to_typename (plugin->api->cls, type))) | ||
150 | return ret; | ||
151 | } | ||
152 | return NULL; | ||
153 | } | ||
154 | |||
155 | |||
156 | /** | ||
157 | * Convert human-readable version of a 'claim' of an credential to the binary | ||
158 | * representation | ||
159 | * | ||
160 | * @param type type of the claim | ||
161 | * @param s human-readable string | ||
162 | * @param data set to value in binary encoding (will be allocated) | ||
163 | * @param data_size set to number of bytes in @a data | ||
164 | * @return #GNUNET_OK on success | ||
165 | */ | ||
166 | int | ||
167 | GNUNET_RECLAIM_credential_string_to_value (uint32_t type, | ||
168 | const char *s, | ||
169 | void **data, | ||
170 | size_t *data_size) | ||
171 | { | ||
172 | unsigned int i; | ||
173 | struct Plugin *plugin; | ||
174 | |||
175 | init (); | ||
176 | for (i = 0; i < num_plugins; i++) | ||
177 | { | ||
178 | plugin = credential_plugins[i]; | ||
179 | if (GNUNET_OK == plugin->api->string_to_value (plugin->api->cls, | ||
180 | type, | ||
181 | s, | ||
182 | data, | ||
183 | data_size)) | ||
184 | return GNUNET_OK; | ||
185 | } | ||
186 | return GNUNET_SYSERR; | ||
187 | } | ||
188 | |||
189 | |||
190 | /** | ||
191 | * Convert the 'claim' of an credential to a string | ||
192 | * | ||
193 | * @param type the type of credential | ||
194 | * @param data claim in binary encoding | ||
195 | * @param data_size number of bytes in @a data | ||
196 | * @return NULL on error, otherwise human-readable representation of the claim | ||
197 | */ | ||
198 | char * | ||
199 | GNUNET_RECLAIM_credential_value_to_string (uint32_t type, | ||
200 | const void *data, | ||
201 | size_t data_size) | ||
202 | { | ||
203 | unsigned int i; | ||
204 | struct Plugin *plugin; | ||
205 | char *ret; | ||
206 | |||
207 | init (); | ||
208 | for (i = 0; i < num_plugins; i++) | ||
209 | { | ||
210 | plugin = credential_plugins[i]; | ||
211 | if (NULL != (ret = plugin->api->value_to_string (plugin->api->cls, | ||
212 | type, | ||
213 | data, | ||
214 | data_size))) | ||
215 | return ret; | ||
216 | } | ||
217 | return NULL; | ||
218 | } | ||
219 | |||
220 | |||
221 | /** | ||
222 | * Create a new credential. | ||
223 | * | ||
224 | * @param attr_name the credential name | ||
225 | * @param type the credential type | ||
226 | * @param data the credential value | ||
227 | * @param data_size the credential value size | ||
228 | * @return the new credential | ||
229 | */ | ||
230 | struct GNUNET_RECLAIM_Credential * | ||
231 | GNUNET_RECLAIM_credential_new (const char *attr_name, | ||
232 | uint32_t type, | ||
233 | const void *data, | ||
234 | size_t data_size) | ||
235 | { | ||
236 | struct GNUNET_RECLAIM_Credential *attr; | ||
237 | char *write_ptr; | ||
238 | char *attr_name_tmp = GNUNET_strdup (attr_name); | ||
239 | |||
240 | GNUNET_STRINGS_utf8_tolower (attr_name, attr_name_tmp); | ||
241 | |||
242 | attr = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Credential) | ||
243 | + strlen (attr_name_tmp) + 1 + data_size); | ||
244 | attr->type = type; | ||
245 | attr->data_size = data_size; | ||
246 | attr->flag = 0; | ||
247 | write_ptr = (char *) &attr[1]; | ||
248 | GNUNET_memcpy (write_ptr, attr_name_tmp, strlen (attr_name_tmp) + 1); | ||
249 | attr->name = write_ptr; | ||
250 | write_ptr += strlen (attr->name) + 1; | ||
251 | GNUNET_memcpy (write_ptr, data, data_size); | ||
252 | attr->data = write_ptr; | ||
253 | GNUNET_free (attr_name_tmp); | ||
254 | return attr; | ||
255 | } | ||
256 | |||
257 | |||
258 | /** | ||
259 | * Get required size for serialization buffer | ||
260 | * | ||
261 | * @param attrs the attribute list to serialize | ||
262 | * @return the required buffer size | ||
263 | */ | ||
264 | size_t | ||
265 | GNUNET_RECLAIM_credential_list_serialize_get_size ( | ||
266 | const struct GNUNET_RECLAIM_CredentialList *credentials) | ||
267 | { | ||
268 | struct GNUNET_RECLAIM_CredentialListEntry *le; | ||
269 | size_t len = 0; | ||
270 | |||
271 | for (le = credentials->list_head; NULL != le; le = le->next) | ||
272 | { | ||
273 | GNUNET_assert (NULL != le->credential); | ||
274 | len += GNUNET_RECLAIM_credential_serialize_get_size (le->credential); | ||
275 | len += sizeof(struct GNUNET_RECLAIM_CredentialListEntry); | ||
276 | } | ||
277 | return len; | ||
278 | } | ||
279 | |||
280 | |||
281 | /** | ||
282 | * Serialize an attribute list | ||
283 | * | ||
284 | * @param attrs the attribute list to serialize | ||
285 | * @param result the serialized attribute | ||
286 | * @return length of serialized data | ||
287 | */ | ||
288 | size_t | ||
289 | GNUNET_RECLAIM_credential_list_serialize ( | ||
290 | const struct GNUNET_RECLAIM_CredentialList *credentials, | ||
291 | char *result) | ||
292 | { | ||
293 | struct GNUNET_RECLAIM_CredentialListEntry *le; | ||
294 | size_t len; | ||
295 | size_t total_len; | ||
296 | char *write_ptr; | ||
297 | write_ptr = result; | ||
298 | total_len = 0; | ||
299 | for (le = credentials->list_head; NULL != le; le = le->next) | ||
300 | { | ||
301 | GNUNET_assert (NULL != le->credential); | ||
302 | len = GNUNET_RECLAIM_credential_serialize (le->credential, write_ptr); | ||
303 | total_len += len; | ||
304 | write_ptr += len; | ||
305 | } | ||
306 | return total_len; | ||
307 | } | ||
308 | |||
309 | |||
310 | /** | ||
311 | * Deserialize an credential list | ||
312 | * | ||
313 | * @param data the serialized attribute list | ||
314 | * @param data_size the length of the serialized data | ||
315 | * @return a GNUNET_IDENTITY_PROVIDER_AttributeList, must be free'd by caller | ||
316 | */ | ||
317 | struct GNUNET_RECLAIM_CredentialList * | ||
318 | GNUNET_RECLAIM_credential_list_deserialize (const char *data, size_t data_size) | ||
319 | { | ||
320 | struct GNUNET_RECLAIM_CredentialList *al; | ||
321 | struct GNUNET_RECLAIM_CredentialListEntry *ale; | ||
322 | size_t att_len; | ||
323 | const char *read_ptr; | ||
324 | |||
325 | al = GNUNET_new (struct GNUNET_RECLAIM_CredentialList); | ||
326 | |||
327 | if ((data_size < sizeof(struct | ||
328 | Credential) | ||
329 | + sizeof(struct GNUNET_RECLAIM_CredentialListEntry))) | ||
330 | return al; | ||
331 | |||
332 | read_ptr = data; | ||
333 | while (((data + data_size) - read_ptr) >= sizeof(struct Credential)) | ||
334 | { | ||
335 | ale = GNUNET_new (struct GNUNET_RECLAIM_CredentialListEntry); | ||
336 | ale->credential = | ||
337 | GNUNET_RECLAIM_credential_deserialize (read_ptr, | ||
338 | data_size - (read_ptr - data)); | ||
339 | if (NULL == ale->credential) | ||
340 | { | ||
341 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
342 | "Failed to deserialize malformed credential.\n"); | ||
343 | GNUNET_free (ale); | ||
344 | return al; | ||
345 | } | ||
346 | GNUNET_CONTAINER_DLL_insert (al->list_head, al->list_tail, ale); | ||
347 | att_len = GNUNET_RECLAIM_credential_serialize_get_size (ale->credential); | ||
348 | read_ptr += att_len; | ||
349 | } | ||
350 | return al; | ||
351 | } | ||
352 | |||
353 | |||
354 | /** | ||
355 | * Make a (deep) copy of the credential list | ||
356 | * @param attrs claim list to copy | ||
357 | * @return copied claim list | ||
358 | */ | ||
359 | struct GNUNET_RECLAIM_CredentialList * | ||
360 | GNUNET_RECLAIM_credential_list_dup ( | ||
361 | const struct GNUNET_RECLAIM_CredentialList *al) | ||
362 | { | ||
363 | struct GNUNET_RECLAIM_CredentialListEntry *ale; | ||
364 | struct GNUNET_RECLAIM_CredentialListEntry *result_ale; | ||
365 | struct GNUNET_RECLAIM_CredentialList *result; | ||
366 | |||
367 | result = GNUNET_new (struct GNUNET_RECLAIM_CredentialList); | ||
368 | for (ale = al->list_head; NULL != ale; ale = ale->next) | ||
369 | { | ||
370 | result_ale = GNUNET_new (struct GNUNET_RECLAIM_CredentialListEntry); | ||
371 | GNUNET_assert (NULL != ale->credential); | ||
372 | result_ale->credential = | ||
373 | GNUNET_RECLAIM_credential_new (ale->credential->name, | ||
374 | ale->credential->type, | ||
375 | ale->credential->data, | ||
376 | ale->credential->data_size); | ||
377 | result_ale->credential->id = ale->credential->id; | ||
378 | GNUNET_CONTAINER_DLL_insert (result->list_head, | ||
379 | result->list_tail, | ||
380 | result_ale); | ||
381 | } | ||
382 | return result; | ||
383 | } | ||
384 | |||
385 | |||
386 | /** | ||
387 | * Destroy credential list | ||
388 | * | ||
389 | * @param attrs list to destroy | ||
390 | */ | ||
391 | void | ||
392 | GNUNET_RECLAIM_credential_list_destroy ( | ||
393 | struct GNUNET_RECLAIM_CredentialList *al) | ||
394 | { | ||
395 | struct GNUNET_RECLAIM_CredentialListEntry *ale; | ||
396 | struct GNUNET_RECLAIM_CredentialListEntry *tmp_ale; | ||
397 | |||
398 | for (ale = al->list_head; NULL != ale;) | ||
399 | { | ||
400 | if (NULL != ale->credential) | ||
401 | GNUNET_free (ale->credential); | ||
402 | tmp_ale = ale; | ||
403 | ale = ale->next; | ||
404 | GNUNET_free (tmp_ale); | ||
405 | } | ||
406 | GNUNET_free (al); | ||
407 | } | ||
408 | |||
409 | |||
410 | /** | ||
411 | * Get required size for serialization buffer | ||
412 | * | ||
413 | * @param attr the credential to serialize | ||
414 | * @return the required buffer size | ||
415 | */ | ||
416 | size_t | ||
417 | GNUNET_RECLAIM_credential_serialize_get_size ( | ||
418 | const struct GNUNET_RECLAIM_Credential *credential) | ||
419 | { | ||
420 | return sizeof(struct Credential) + strlen (credential->name) | ||
421 | + credential->data_size; | ||
422 | } | ||
423 | |||
424 | |||
425 | /** | ||
426 | * Serialize an credential | ||
427 | * | ||
428 | * @param attr the credential to serialize | ||
429 | * @param result the serialized credential | ||
430 | * @return length of serialized data | ||
431 | */ | ||
432 | size_t | ||
433 | GNUNET_RECLAIM_credential_serialize ( | ||
434 | const struct GNUNET_RECLAIM_Credential *credential, | ||
435 | char *result) | ||
436 | { | ||
437 | size_t data_len_ser; | ||
438 | size_t name_len; | ||
439 | struct Credential *atts; | ||
440 | char *write_ptr; | ||
441 | |||
442 | atts = (struct Credential *) result; | ||
443 | atts->credential_type = htons (credential->type); | ||
444 | atts->credential_flag = htonl (credential->flag); | ||
445 | atts->credential_id = credential->id; | ||
446 | name_len = strlen (credential->name); | ||
447 | atts->name_len = htons (name_len); | ||
448 | write_ptr = (char *) &atts[1]; | ||
449 | GNUNET_memcpy (write_ptr, credential->name, name_len); | ||
450 | write_ptr += name_len; | ||
451 | // TODO plugin-ize | ||
452 | // data_len_ser = plugin->serialize_attribute_value (attr, | ||
453 | // &attr_ser[1]); | ||
454 | data_len_ser = credential->data_size; | ||
455 | GNUNET_memcpy (write_ptr, credential->data, credential->data_size); | ||
456 | atts->data_size = htons (data_len_ser); | ||
457 | |||
458 | return sizeof(struct Credential) + strlen (credential->name) | ||
459 | + credential->data_size; | ||
460 | } | ||
461 | |||
462 | |||
463 | /** | ||
464 | * Deserialize an credential | ||
465 | * | ||
466 | * @param data the serialized credential | ||
467 | * @param data_size the length of the serialized data | ||
468 | * | ||
469 | * @return a GNUNET_IDENTITY_PROVIDER_Attribute, must be free'd by caller | ||
470 | */ | ||
471 | struct GNUNET_RECLAIM_Credential * | ||
472 | GNUNET_RECLAIM_credential_deserialize (const char *data, size_t data_size) | ||
473 | { | ||
474 | struct GNUNET_RECLAIM_Credential *credential; | ||
475 | struct Credential *atts; | ||
476 | size_t data_len; | ||
477 | size_t name_len; | ||
478 | char *write_ptr; | ||
479 | |||
480 | if (data_size < sizeof(struct Credential)) | ||
481 | return NULL; | ||
482 | |||
483 | atts = (struct Credential *) data; | ||
484 | data_len = ntohs (atts->data_size); | ||
485 | name_len = ntohs (atts->name_len); | ||
486 | if (data_size < sizeof(struct Credential) + data_len + name_len) | ||
487 | { | ||
488 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
489 | "Buffer too small to deserialize\n"); | ||
490 | return NULL; | ||
491 | } | ||
492 | credential = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Credential) | ||
493 | + data_len + name_len + 1); | ||
494 | credential->type = ntohs (atts->credential_type); | ||
495 | credential->flag = ntohl (atts->credential_flag); | ||
496 | credential->id = atts->credential_id; | ||
497 | credential->data_size = data_len; | ||
498 | |||
499 | write_ptr = (char *) &credential[1]; | ||
500 | GNUNET_memcpy (write_ptr, &atts[1], name_len); | ||
501 | write_ptr[name_len] = '\0'; | ||
502 | credential->name = write_ptr; | ||
503 | |||
504 | write_ptr += name_len + 1; | ||
505 | GNUNET_memcpy (write_ptr, (char *) &atts[1] + name_len, | ||
506 | credential->data_size); | ||
507 | credential->data = write_ptr; | ||
508 | return credential; | ||
509 | } | ||
510 | |||
511 | |||
512 | struct GNUNET_RECLAIM_AttributeList* | ||
513 | GNUNET_RECLAIM_credential_get_attributes (const struct | ||
514 | GNUNET_RECLAIM_Credential *credential) | ||
515 | { | ||
516 | unsigned int i; | ||
517 | struct Plugin *plugin; | ||
518 | struct GNUNET_RECLAIM_AttributeList *ret; | ||
519 | init (); | ||
520 | for (i = 0; i < num_plugins; i++) | ||
521 | { | ||
522 | plugin = credential_plugins[i]; | ||
523 | if (NULL != | ||
524 | (ret = plugin->api->get_attributes (plugin->api->cls, | ||
525 | credential))) | ||
526 | return ret; | ||
527 | } | ||
528 | return NULL; | ||
529 | } | ||
530 | |||
531 | |||
532 | char* | ||
533 | GNUNET_RECLAIM_credential_get_issuer (const struct | ||
534 | GNUNET_RECLAIM_Credential *credential) | ||
535 | { | ||
536 | unsigned int i; | ||
537 | struct Plugin *plugin; | ||
538 | char *ret; | ||
539 | init (); | ||
540 | for (i = 0; i < num_plugins; i++) | ||
541 | { | ||
542 | plugin = credential_plugins[i]; | ||
543 | if (NULL != | ||
544 | (ret = plugin->api->get_issuer (plugin->api->cls, | ||
545 | credential))) | ||
546 | return ret; | ||
547 | } | ||
548 | return NULL; | ||
549 | } | ||
550 | |||
551 | |||
552 | int | ||
553 | GNUNET_RECLAIM_credential_get_expiration (const struct | ||
554 | GNUNET_RECLAIM_Credential *credential, | ||
555 | struct GNUNET_TIME_Absolute*exp) | ||
556 | { | ||
557 | unsigned int i; | ||
558 | struct Plugin *plugin; | ||
559 | init (); | ||
560 | for (i = 0; i < num_plugins; i++) | ||
561 | { | ||
562 | plugin = credential_plugins[i]; | ||
563 | if (GNUNET_OK != plugin->api->get_expiration (plugin->api->cls, | ||
564 | credential, | ||
565 | exp)) | ||
566 | continue; | ||
567 | return GNUNET_OK; | ||
568 | } | ||
569 | return GNUNET_SYSERR; | ||
570 | } | ||
571 | |||
572 | |||
573 | /** | ||
574 | * Convert an presentation type name to the corresponding number | ||
575 | * | ||
576 | * @param typename name to convert | ||
577 | * @return corresponding number, UINT32_MAX on error | ||
578 | */ | ||
579 | uint32_t | ||
580 | GNUNET_RECLAIM_presentation_typename_to_number (const char *typename) | ||
581 | { | ||
582 | unsigned int i; | ||
583 | struct Plugin *plugin; | ||
584 | uint32_t ret; | ||
585 | init (); | ||
586 | for (i = 0; i < num_plugins; i++) | ||
587 | { | ||
588 | plugin = credential_plugins[i]; | ||
589 | if (UINT32_MAX != | ||
590 | (ret = plugin->api->typename_to_number_p (plugin->api->cls, | ||
591 | typename))) | ||
592 | return ret; | ||
593 | } | ||
594 | return UINT32_MAX; | ||
595 | } | ||
596 | |||
597 | |||
598 | /** | ||
599 | * Convert an presentation type number to the corresponding presentation type string | ||
600 | * | ||
601 | * @param type number of a type | ||
602 | * @return corresponding typestring, NULL on error | ||
603 | */ | ||
604 | const char * | ||
605 | GNUNET_RECLAIM_presentation_number_to_typename (uint32_t type) | ||
606 | { | ||
607 | unsigned int i; | ||
608 | struct Plugin *plugin; | ||
609 | const char *ret; | ||
610 | |||
611 | init (); | ||
612 | for (i = 0; i < num_plugins; i++) | ||
613 | { | ||
614 | plugin = credential_plugins[i]; | ||
615 | if (NULL != | ||
616 | (ret = plugin->api->number_to_typename_p (plugin->api->cls, type))) | ||
617 | return ret; | ||
618 | } | ||
619 | return NULL; | ||
620 | } | ||
621 | |||
622 | |||
623 | /** | ||
624 | * Convert human-readable version of a 'claim' of an presentation to the binary | ||
625 | * representation | ||
626 | * | ||
627 | * @param type type of the claim | ||
628 | * @param s human-readable string | ||
629 | * @param data set to value in binary encoding (will be allocated) | ||
630 | * @param data_size set to number of bytes in @a data | ||
631 | * @return #GNUNET_OK on success | ||
632 | */ | ||
633 | int | ||
634 | GNUNET_RECLAIM_presentation_string_to_value (uint32_t type, | ||
635 | const char *s, | ||
636 | void **data, | ||
637 | size_t *data_size) | ||
638 | { | ||
639 | unsigned int i; | ||
640 | struct Plugin *plugin; | ||
641 | |||
642 | init (); | ||
643 | for (i = 0; i < num_plugins; i++) | ||
644 | { | ||
645 | plugin = credential_plugins[i]; | ||
646 | if (GNUNET_OK == plugin->api->string_to_value_p (plugin->api->cls, | ||
647 | type, | ||
648 | s, | ||
649 | data, | ||
650 | data_size)) | ||
651 | return GNUNET_OK; | ||
652 | } | ||
653 | return GNUNET_SYSERR; | ||
654 | } | ||
655 | |||
656 | |||
657 | /** | ||
658 | * Convert the 'claim' of an presentation to a string | ||
659 | * | ||
660 | * @param type the type of presentation | ||
661 | * @param data claim in binary encoding | ||
662 | * @param data_size number of bytes in @a data | ||
663 | * @return NULL on error, otherwise human-readable representation of the claim | ||
664 | */ | ||
665 | char * | ||
666 | GNUNET_RECLAIM_presentation_value_to_string (uint32_t type, | ||
667 | const void *data, | ||
668 | size_t data_size) | ||
669 | { | ||
670 | unsigned int i; | ||
671 | struct Plugin *plugin; | ||
672 | char *ret; | ||
673 | |||
674 | init (); | ||
675 | for (i = 0; i < num_plugins; i++) | ||
676 | { | ||
677 | plugin = credential_plugins[i]; | ||
678 | if (NULL != (ret = plugin->api->value_to_string_p (plugin->api->cls, | ||
679 | type, | ||
680 | data, | ||
681 | data_size))) | ||
682 | return ret; | ||
683 | } | ||
684 | return NULL; | ||
685 | } | ||
686 | |||
687 | |||
688 | struct GNUNET_RECLAIM_Presentation * | ||
689 | GNUNET_RECLAIM_presentation_new (uint32_t type, | ||
690 | const void *data, | ||
691 | size_t data_size) | ||
692 | { | ||
693 | struct GNUNET_RECLAIM_Presentation *attr; | ||
694 | char *write_ptr; | ||
695 | |||
696 | attr = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Presentation) | ||
697 | + data_size); | ||
698 | attr->type = type; | ||
699 | attr->data_size = data_size; | ||
700 | write_ptr = (char *) &attr[1]; | ||
701 | GNUNET_memcpy (write_ptr, data, data_size); | ||
702 | attr->data = write_ptr; | ||
703 | return attr; | ||
704 | } | ||
705 | |||
706 | |||
707 | /** | ||
708 | * Get required size for serialization buffer | ||
709 | * | ||
710 | * @param attrs the attribute list to serialize | ||
711 | * @return the required buffer size | ||
712 | */ | ||
713 | size_t | ||
714 | GNUNET_RECLAIM_presentation_list_serialize_get_size ( | ||
715 | const struct GNUNET_RECLAIM_PresentationList *presentations) | ||
716 | { | ||
717 | struct GNUNET_RECLAIM_PresentationListEntry *le; | ||
718 | size_t len = 0; | ||
719 | |||
720 | for (le = presentations->list_head; NULL != le; le = le->next) | ||
721 | { | ||
722 | GNUNET_assert (NULL != le->presentation); | ||
723 | len += GNUNET_RECLAIM_presentation_serialize_get_size (le->presentation); | ||
724 | len += sizeof(struct GNUNET_RECLAIM_PresentationListEntry); | ||
725 | } | ||
726 | return len; | ||
727 | } | ||
728 | |||
729 | |||
730 | /** | ||
731 | * Serialize an attribute list | ||
732 | * | ||
733 | * @param attrs the attribute list to serialize | ||
734 | * @param result the serialized attribute | ||
735 | * @return length of serialized data | ||
736 | */ | ||
737 | size_t | ||
738 | GNUNET_RECLAIM_presentation_list_serialize ( | ||
739 | const struct GNUNET_RECLAIM_PresentationList *presentations, | ||
740 | char *result) | ||
741 | { | ||
742 | struct GNUNET_RECLAIM_PresentationListEntry *le; | ||
743 | size_t len; | ||
744 | size_t total_len; | ||
745 | char *write_ptr; | ||
746 | write_ptr = result; | ||
747 | total_len = 0; | ||
748 | for (le = presentations->list_head; NULL != le; le = le->next) | ||
749 | { | ||
750 | GNUNET_assert (NULL != le->presentation); | ||
751 | len = GNUNET_RECLAIM_presentation_serialize (le->presentation, write_ptr); | ||
752 | total_len += len; | ||
753 | write_ptr += len; | ||
754 | } | ||
755 | return total_len; | ||
756 | } | ||
757 | |||
758 | |||
759 | /** | ||
760 | * Deserialize an presentation list | ||
761 | * | ||
762 | * @param data the serialized attribute list | ||
763 | * @param data_size the length of the serialized data | ||
764 | * @return a GNUNET_IDENTITY_PROVIDER_AttributeList, must be free'd by caller | ||
765 | */ | ||
766 | struct GNUNET_RECLAIM_PresentationList * | ||
767 | GNUNET_RECLAIM_presentation_list_deserialize (const char *data, size_t | ||
768 | data_size) | ||
769 | { | ||
770 | struct GNUNET_RECLAIM_PresentationList *al; | ||
771 | struct GNUNET_RECLAIM_PresentationListEntry *ale; | ||
772 | size_t att_len; | ||
773 | const char *read_ptr; | ||
774 | |||
775 | al = GNUNET_new (struct GNUNET_RECLAIM_PresentationList); | ||
776 | |||
777 | if ((data_size < sizeof(struct Presentation) | ||
778 | + sizeof(struct GNUNET_RECLAIM_PresentationListEntry))) | ||
779 | return al; | ||
780 | |||
781 | read_ptr = data; | ||
782 | while (((data + data_size) - read_ptr) >= sizeof(struct Presentation)) | ||
783 | { | ||
784 | ale = GNUNET_new (struct GNUNET_RECLAIM_PresentationListEntry); | ||
785 | ale->presentation = | ||
786 | GNUNET_RECLAIM_presentation_deserialize (read_ptr, | ||
787 | data_size - (read_ptr - data)); | ||
788 | if (NULL == ale->presentation) | ||
789 | { | ||
790 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
791 | "Failed to deserialize malformed presentation.\n"); | ||
792 | GNUNET_free (ale); | ||
793 | return al; | ||
794 | } | ||
795 | GNUNET_CONTAINER_DLL_insert (al->list_head, al->list_tail, ale); | ||
796 | att_len = GNUNET_RECLAIM_presentation_serialize_get_size ( | ||
797 | ale->presentation); | ||
798 | read_ptr += att_len; | ||
799 | } | ||
800 | return al; | ||
801 | } | ||
802 | |||
803 | |||
804 | /** | ||
805 | * Make a (deep) copy of the presentation list | ||
806 | * @param attrs claim list to copy | ||
807 | * @return copied claim list | ||
808 | */ | ||
809 | struct GNUNET_RECLAIM_PresentationList * | ||
810 | GNUNET_RECLAIM_presentation_list_dup ( | ||
811 | const struct GNUNET_RECLAIM_PresentationList *al) | ||
812 | { | ||
813 | struct GNUNET_RECLAIM_PresentationListEntry *ale; | ||
814 | struct GNUNET_RECLAIM_PresentationListEntry *result_ale; | ||
815 | struct GNUNET_RECLAIM_PresentationList *result; | ||
816 | |||
817 | result = GNUNET_new (struct GNUNET_RECLAIM_PresentationList); | ||
818 | for (ale = al->list_head; NULL != ale; ale = ale->next) | ||
819 | { | ||
820 | result_ale = GNUNET_new (struct GNUNET_RECLAIM_PresentationListEntry); | ||
821 | GNUNET_assert (NULL != ale->presentation); | ||
822 | result_ale->presentation = | ||
823 | GNUNET_RECLAIM_presentation_new (ale->presentation->type, | ||
824 | ale->presentation->data, | ||
825 | ale->presentation->data_size); | ||
826 | result_ale->presentation->credential_id = ale->presentation->credential_id; | ||
827 | GNUNET_CONTAINER_DLL_insert (result->list_head, | ||
828 | result->list_tail, | ||
829 | result_ale); | ||
830 | } | ||
831 | return result; | ||
832 | } | ||
833 | |||
834 | |||
835 | /** | ||
836 | * Destroy presentation list | ||
837 | * | ||
838 | * @param attrs list to destroy | ||
839 | */ | ||
840 | void | ||
841 | GNUNET_RECLAIM_presentation_list_destroy ( | ||
842 | struct GNUNET_RECLAIM_PresentationList *al) | ||
843 | { | ||
844 | struct GNUNET_RECLAIM_PresentationListEntry *ale; | ||
845 | struct GNUNET_RECLAIM_PresentationListEntry *tmp_ale; | ||
846 | |||
847 | for (ale = al->list_head; NULL != ale;) | ||
848 | { | ||
849 | if (NULL != ale->presentation) | ||
850 | GNUNET_free (ale->presentation); | ||
851 | tmp_ale = ale; | ||
852 | ale = ale->next; | ||
853 | GNUNET_free (tmp_ale); | ||
854 | } | ||
855 | GNUNET_free (al); | ||
856 | } | ||
857 | |||
858 | |||
859 | /** | ||
860 | * Get required size for serialization buffer | ||
861 | * | ||
862 | * @param attr the presentation to serialize | ||
863 | * @return the required buffer size | ||
864 | */ | ||
865 | size_t | ||
866 | GNUNET_RECLAIM_presentation_serialize_get_size ( | ||
867 | const struct GNUNET_RECLAIM_Presentation *presentation) | ||
868 | { | ||
869 | return sizeof(struct Presentation) + presentation->data_size; | ||
870 | } | ||
871 | |||
872 | |||
873 | /** | ||
874 | * Serialize an presentation | ||
875 | * | ||
876 | * @param attr the presentation to serialize | ||
877 | * @param result the serialized presentation | ||
878 | * @return length of serialized data | ||
879 | */ | ||
880 | size_t | ||
881 | GNUNET_RECLAIM_presentation_serialize ( | ||
882 | const struct GNUNET_RECLAIM_Presentation *presentation, | ||
883 | char *result) | ||
884 | { | ||
885 | struct Presentation *atts; | ||
886 | char *write_ptr; | ||
887 | |||
888 | atts = (struct Presentation *) result; | ||
889 | atts->presentation_type = htons (presentation->type); | ||
890 | atts->credential_id = presentation->credential_id; | ||
891 | write_ptr = (char *) &atts[1]; | ||
892 | GNUNET_memcpy (write_ptr, presentation->data, presentation->data_size); | ||
893 | atts->data_size = htons (presentation->data_size); | ||
894 | |||
895 | return sizeof(struct Presentation) + presentation->data_size; | ||
896 | } | ||
897 | |||
898 | |||
899 | /** | ||
900 | * Deserialize an presentation | ||
901 | * | ||
902 | * @param data the serialized presentation | ||
903 | * @param data_size the length of the serialized data | ||
904 | * | ||
905 | * @return a GNUNET_IDENTITY_PROVIDER_Attribute, must be free'd by caller | ||
906 | */ | ||
907 | struct GNUNET_RECLAIM_Presentation * | ||
908 | GNUNET_RECLAIM_presentation_deserialize (const char *data, size_t data_size) | ||
909 | { | ||
910 | struct GNUNET_RECLAIM_Presentation *presentation; | ||
911 | struct Presentation *atts; | ||
912 | size_t data_len; | ||
913 | char *write_ptr; | ||
914 | |||
915 | if (data_size < sizeof(struct Presentation)) | ||
916 | return NULL; | ||
917 | |||
918 | atts = (struct Presentation *) data; | ||
919 | data_len = ntohs (atts->data_size); | ||
920 | if (data_size < sizeof(struct Presentation) + data_len) | ||
921 | { | ||
922 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
923 | "Buffer too small to deserialize\n"); | ||
924 | return NULL; | ||
925 | } | ||
926 | presentation = GNUNET_malloc (sizeof(struct GNUNET_RECLAIM_Presentation) | ||
927 | + data_len); | ||
928 | presentation->type = ntohs (atts->presentation_type); | ||
929 | presentation->credential_id = atts->credential_id; | ||
930 | presentation->data_size = data_len; | ||
931 | |||
932 | write_ptr = (char *) &presentation[1]; | ||
933 | GNUNET_memcpy (write_ptr, &atts[1], data_len); | ||
934 | presentation->data = write_ptr; | ||
935 | return presentation; | ||
936 | } | ||
937 | |||
938 | |||
939 | struct GNUNET_RECLAIM_AttributeList* | ||
940 | GNUNET_RECLAIM_presentation_get_attributes (const struct | ||
941 | GNUNET_RECLAIM_Presentation * | ||
942 | presentation) | ||
943 | { | ||
944 | unsigned int i; | ||
945 | struct Plugin *plugin; | ||
946 | struct GNUNET_RECLAIM_AttributeList *ret; | ||
947 | init (); | ||
948 | for (i = 0; i < num_plugins; i++) | ||
949 | { | ||
950 | plugin = credential_plugins[i]; | ||
951 | if (NULL != | ||
952 | (ret = plugin->api->get_attributes_p (plugin->api->cls, | ||
953 | presentation))) | ||
954 | return ret; | ||
955 | } | ||
956 | return NULL; | ||
957 | } | ||
958 | |||
959 | |||
960 | char* | ||
961 | GNUNET_RECLAIM_presentation_get_issuer (const struct | ||
962 | GNUNET_RECLAIM_Presentation * | ||
963 | presentation) | ||
964 | { | ||
965 | unsigned int i; | ||
966 | struct Plugin *plugin; | ||
967 | char *ret; | ||
968 | init (); | ||
969 | for (i = 0; i < num_plugins; i++) | ||
970 | { | ||
971 | plugin = credential_plugins[i]; | ||
972 | if (NULL != | ||
973 | (ret = plugin->api->get_issuer_p (plugin->api->cls, | ||
974 | presentation))) | ||
975 | return ret; | ||
976 | } | ||
977 | return NULL; | ||
978 | } | ||
979 | |||
980 | |||
981 | int | ||
982 | GNUNET_RECLAIM_presentation_get_expiration (const struct | ||
983 | GNUNET_RECLAIM_Presentation * | ||
984 | presentation, | ||
985 | struct GNUNET_TIME_Absolute*exp) | ||
986 | { | ||
987 | unsigned int i; | ||
988 | struct Plugin *plugin; | ||
989 | init (); | ||
990 | for (i = 0; i < num_plugins; i++) | ||
991 | { | ||
992 | plugin = credential_plugins[i]; | ||
993 | if (GNUNET_OK != plugin->api->get_expiration_p (plugin->api->cls, | ||
994 | presentation, | ||
995 | exp)) | ||
996 | continue; | ||
997 | return GNUNET_OK; | ||
998 | } | ||
999 | return GNUNET_SYSERR; | ||
1000 | } | ||
1001 | |||
1002 | /** | ||
1003 | * Create a presentation from a credential and a lift of (selected) | ||
1004 | * attributes in the credential. | ||
1005 | * FIXME not yet implemented | ||
1006 | * | ||
1007 | * @param cred the credential to use | ||
1008 | * @param attrs the attributes to present from the credential | ||
1009 | * @return the credential presentation presenting the attributes according | ||
1010 | * to the presentation mechanism of the credential | ||
1011 | * or NULL on error. | ||
1012 | */ | ||
1013 | int | ||
1014 | GNUNET_RECLAIM_credential_get_presentation ( | ||
1015 | const struct GNUNET_RECLAIM_Credential *cred, | ||
1016 | const struct GNUNET_RECLAIM_AttributeList *attrs, | ||
1017 | struct GNUNET_RECLAIM_Presentation **pres) | ||
1018 | { | ||
1019 | unsigned int i; | ||
1020 | struct Plugin *plugin; | ||
1021 | init (); | ||
1022 | for (i = 0; i < num_plugins; i++) | ||
1023 | { | ||
1024 | plugin = credential_plugins[i]; | ||
1025 | if (GNUNET_OK != plugin->api->create_presentation (plugin->api->cls, | ||
1026 | cred, | ||
1027 | attrs, | ||
1028 | pres)) | ||
1029 | continue; | ||
1030 | (*pres)->credential_id = cred->id; | ||
1031 | return GNUNET_OK; | ||
1032 | } | ||
1033 | return GNUNET_SYSERR; | ||
1034 | } | ||
1035 | |||
1036 | |||
1037 | |||