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Diffstat (limited to 'src/reclaim-attribute/reclaim_attribute.c')
-rw-r--r-- | src/reclaim-attribute/reclaim_attribute.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/src/reclaim-attribute/reclaim_attribute.c b/src/reclaim-attribute/reclaim_attribute.c new file mode 100644 index 000000000..1ffa9618f --- /dev/null +++ b/src/reclaim-attribute/reclaim_attribute.c | |||
@@ -0,0 +1,448 @@ | |||
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 | |||
19 | /** | ||
20 | * @file reclaim-attribute/reclaim_attribute.c | ||
21 | * @brief helper library to manage identity attributes | ||
22 | * @author Martin Schanzenbach | ||
23 | */ | ||
24 | #include "platform.h" | ||
25 | #include "gnunet_util_lib.h" | ||
26 | #include "reclaim_attribute.h" | ||
27 | #include "gnunet_reclaim_attribute_plugin.h" | ||
28 | |||
29 | /** | ||
30 | * Handle for a plugin | ||
31 | */ | ||
32 | struct Plugin | ||
33 | { | ||
34 | /** | ||
35 | * Name of the plugin | ||
36 | */ | ||
37 | char *library_name; | ||
38 | |||
39 | /** | ||
40 | * Plugin API | ||
41 | */ | ||
42 | struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api; | ||
43 | }; | ||
44 | |||
45 | /** | ||
46 | * Plugins | ||
47 | */ | ||
48 | static struct Plugin **attr_plugins; | ||
49 | |||
50 | /** | ||
51 | * Number of plugins | ||
52 | */ | ||
53 | static unsigned int num_plugins; | ||
54 | |||
55 | /** | ||
56 | * Init canary | ||
57 | */ | ||
58 | static int initialized; | ||
59 | |||
60 | /** | ||
61 | * Add a plugin | ||
62 | */ | ||
63 | static void | ||
64 | add_plugin (void* cls, | ||
65 | const char *library_name, | ||
66 | void *lib_ret) | ||
67 | { | ||
68 | struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api = lib_ret; | ||
69 | struct Plugin *plugin; | ||
70 | |||
71 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
72 | "Loading attribute plugin `%s'\n", | ||
73 | library_name); | ||
74 | plugin = GNUNET_new (struct Plugin); | ||
75 | plugin->api = api; | ||
76 | plugin->library_name = GNUNET_strdup (library_name); | ||
77 | GNUNET_array_append (attr_plugins, num_plugins, plugin); | ||
78 | } | ||
79 | |||
80 | /** | ||
81 | * Load plugins | ||
82 | */ | ||
83 | static void | ||
84 | init() | ||
85 | { | ||
86 | if (GNUNET_YES == initialized) | ||
87 | return; | ||
88 | initialized = GNUNET_YES; | ||
89 | GNUNET_PLUGIN_load_all ("libgnunet_plugin_reclaim_attribute_", NULL, | ||
90 | &add_plugin, NULL); | ||
91 | } | ||
92 | |||
93 | /** | ||
94 | * Convert a type name to the corresponding number | ||
95 | * | ||
96 | * @param typename name to convert | ||
97 | * @return corresponding number, UINT32_MAX on error | ||
98 | */ | ||
99 | uint32_t | ||
100 | GNUNET_RECLAIM_ATTRIBUTE_typename_to_number (const char *typename) | ||
101 | { | ||
102 | unsigned int i; | ||
103 | struct Plugin *plugin; | ||
104 | uint32_t ret; | ||
105 | |||
106 | init (); | ||
107 | for (i = 0; i < num_plugins; i++) | ||
108 | { | ||
109 | plugin = attr_plugins[i]; | ||
110 | if (UINT32_MAX != (ret = plugin->api->typename_to_number (plugin->api->cls, | ||
111 | typename))) | ||
112 | return ret; | ||
113 | } | ||
114 | return UINT32_MAX; | ||
115 | } | ||
116 | |||
117 | /** | ||
118 | * Convert a type number to the corresponding type string | ||
119 | * | ||
120 | * @param type number of a type | ||
121 | * @return corresponding typestring, NULL on error | ||
122 | */ | ||
123 | const char* | ||
124 | GNUNET_RECLAIM_ATTRIBUTE_number_to_typename (uint32_t type) | ||
125 | { | ||
126 | unsigned int i; | ||
127 | struct Plugin *plugin; | ||
128 | const char *ret; | ||
129 | |||
130 | init (); | ||
131 | for (i = 0; i < num_plugins; i++) | ||
132 | { | ||
133 | plugin = attr_plugins[i]; | ||
134 | if (NULL != (ret = plugin->api->number_to_typename (plugin->api->cls, | ||
135 | type))) | ||
136 | return ret; | ||
137 | } | ||
138 | return NULL; | ||
139 | } | ||
140 | |||
141 | /** | ||
142 | * Convert human-readable version of a 'claim' of an attribute to the binary | ||
143 | * representation | ||
144 | * | ||
145 | * @param type type of the claim | ||
146 | * @param s human-readable string | ||
147 | * @param data set to value in binary encoding (will be allocated) | ||
148 | * @param data_size set to number of bytes in @a data | ||
149 | * @return #GNUNET_OK on success | ||
150 | */ | ||
151 | int | ||
152 | GNUNET_RECLAIM_ATTRIBUTE_string_to_value (uint32_t type, | ||
153 | const char *s, | ||
154 | void **data, | ||
155 | size_t *data_size) | ||
156 | { | ||
157 | unsigned int i; | ||
158 | struct Plugin *plugin; | ||
159 | |||
160 | init (); | ||
161 | for (i = 0; i < num_plugins; i++) | ||
162 | { | ||
163 | plugin = attr_plugins[i]; | ||
164 | if (GNUNET_OK == plugin->api->string_to_value (plugin->api->cls, | ||
165 | type, | ||
166 | s, | ||
167 | data, | ||
168 | data_size)) | ||
169 | return GNUNET_OK; | ||
170 | } | ||
171 | return GNUNET_SYSERR; | ||
172 | } | ||
173 | |||
174 | /** | ||
175 | * Convert the 'claim' of an attribute to a string | ||
176 | * | ||
177 | * @param type the type of attribute | ||
178 | * @param data claim in binary encoding | ||
179 | * @param data_size number of bytes in @a data | ||
180 | * @return NULL on error, otherwise human-readable representation of the claim | ||
181 | */ | ||
182 | char * | ||
183 | GNUNET_RECLAIM_ATTRIBUTE_value_to_string (uint32_t type, | ||
184 | const void* data, | ||
185 | size_t data_size) | ||
186 | { | ||
187 | unsigned int i; | ||
188 | struct Plugin *plugin; | ||
189 | char *ret; | ||
190 | |||
191 | init(); | ||
192 | for (i = 0; i < num_plugins; i++) | ||
193 | { | ||
194 | plugin = attr_plugins[i]; | ||
195 | if (NULL != (ret = plugin->api->value_to_string (plugin->api->cls, | ||
196 | type, | ||
197 | data, | ||
198 | data_size))) | ||
199 | return ret; | ||
200 | } | ||
201 | return NULL; | ||
202 | } | ||
203 | |||
204 | /** | ||
205 | * Create a new attribute. | ||
206 | * | ||
207 | * @param attr_name the attribute name | ||
208 | * @param type the attribute type | ||
209 | * @param data the attribute value | ||
210 | * @param data_size the attribute value size | ||
211 | * @return the new attribute | ||
212 | */ | ||
213 | struct GNUNET_RECLAIM_ATTRIBUTE_Claim * | ||
214 | GNUNET_RECLAIM_ATTRIBUTE_claim_new (const char* attr_name, | ||
215 | uint32_t type, | ||
216 | const void* data, | ||
217 | size_t data_size) | ||
218 | { | ||
219 | struct GNUNET_RECLAIM_ATTRIBUTE_Claim *attr; | ||
220 | char *write_ptr; | ||
221 | char *attr_name_tmp = GNUNET_strdup (attr_name); | ||
222 | |||
223 | GNUNET_STRINGS_utf8_tolower (attr_name, attr_name_tmp); | ||
224 | |||
225 | attr = GNUNET_malloc (sizeof (struct GNUNET_RECLAIM_ATTRIBUTE_Claim) + | ||
226 | strlen (attr_name_tmp) + 1 + | ||
227 | data_size); | ||
228 | attr->type = type; | ||
229 | attr->data_size = data_size; | ||
230 | attr->version = 0; | ||
231 | write_ptr = (char*)&attr[1]; | ||
232 | GNUNET_memcpy (write_ptr, | ||
233 | attr_name_tmp, | ||
234 | strlen (attr_name_tmp) + 1); | ||
235 | attr->name = write_ptr; | ||
236 | write_ptr += strlen (attr->name) + 1; | ||
237 | GNUNET_memcpy (write_ptr, | ||
238 | data, | ||
239 | data_size); | ||
240 | attr->data = write_ptr; | ||
241 | GNUNET_free (attr_name_tmp); | ||
242 | return attr; | ||
243 | } | ||
244 | |||
245 | /** | ||
246 | * Add a new claim list entry. | ||
247 | * | ||
248 | * @param claim_list the attribute name | ||
249 | * @param attr_name the attribute name | ||
250 | * @param type the attribute type | ||
251 | * @param data the attribute value | ||
252 | * @param data_size the attribute value size | ||
253 | * @return | ||
254 | */ | ||
255 | void | ||
256 | GNUNET_RECLAIM_ATTRIBUTE_list_add (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *claim_list, | ||
257 | const char* attr_name, | ||
258 | uint32_t type, | ||
259 | const void* data, | ||
260 | size_t data_size) | ||
261 | { | ||
262 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *le; | ||
263 | le = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry); | ||
264 | le->claim = GNUNET_RECLAIM_ATTRIBUTE_claim_new (attr_name, | ||
265 | type, | ||
266 | data, | ||
267 | data_size); | ||
268 | GNUNET_CONTAINER_DLL_insert (claim_list->list_head, | ||
269 | claim_list->list_tail, | ||
270 | le); | ||
271 | } | ||
272 | |||
273 | size_t | ||
274 | GNUNET_RECLAIM_ATTRIBUTE_list_serialize_get_size (const struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs) | ||
275 | { | ||
276 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *le; | ||
277 | size_t len = 0; | ||
278 | for (le = attrs->list_head; NULL != le; le = le->next) | ||
279 | len += GNUNET_RECLAIM_ATTRIBUTE_serialize_get_size (le->claim); | ||
280 | return len; | ||
281 | } | ||
282 | |||
283 | size_t | ||
284 | GNUNET_RECLAIM_ATTRIBUTE_list_serialize (const struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs, | ||
285 | char *result) | ||
286 | { | ||
287 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *le; | ||
288 | size_t len; | ||
289 | size_t total_len; | ||
290 | char* write_ptr; | ||
291 | |||
292 | write_ptr = result; | ||
293 | total_len = 0; | ||
294 | for (le = attrs->list_head; NULL != le; le = le->next) | ||
295 | { | ||
296 | len = GNUNET_RECLAIM_ATTRIBUTE_serialize (le->claim, | ||
297 | write_ptr); | ||
298 | total_len += len; | ||
299 | write_ptr += len; | ||
300 | } | ||
301 | return total_len; | ||
302 | } | ||
303 | |||
304 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList * | ||
305 | GNUNET_RECLAIM_ATTRIBUTE_list_deserialize (const char* data, | ||
306 | size_t data_size) | ||
307 | { | ||
308 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs; | ||
309 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *le; | ||
310 | size_t attr_len; | ||
311 | const char* read_ptr; | ||
312 | |||
313 | if (data_size < sizeof (struct Attribute)) | ||
314 | return NULL; | ||
315 | |||
316 | attrs = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList); | ||
317 | read_ptr = data; | ||
318 | while (((data + data_size) - read_ptr) >= sizeof (struct Attribute)) | ||
319 | { | ||
320 | |||
321 | le = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry); | ||
322 | le->claim = GNUNET_RECLAIM_ATTRIBUTE_deserialize (read_ptr, | ||
323 | data_size - (read_ptr - data)); | ||
324 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
325 | "Deserialized attribute %s\n", le->claim->name); | ||
326 | GNUNET_CONTAINER_DLL_insert (attrs->list_head, | ||
327 | attrs->list_tail, | ||
328 | le); | ||
329 | attr_len = GNUNET_RECLAIM_ATTRIBUTE_serialize_get_size (le->claim); | ||
330 | read_ptr += attr_len; | ||
331 | } | ||
332 | return attrs; | ||
333 | } | ||
334 | |||
335 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList* | ||
336 | GNUNET_RECLAIM_ATTRIBUTE_list_dup (const struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs) | ||
337 | { | ||
338 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *le; | ||
339 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *result_le; | ||
340 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *result; | ||
341 | |||
342 | result = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList); | ||
343 | for (le = attrs->list_head; NULL != le; le = le->next) | ||
344 | { | ||
345 | result_le = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry); | ||
346 | result_le->claim = GNUNET_RECLAIM_ATTRIBUTE_claim_new (le->claim->name, | ||
347 | le->claim->type, | ||
348 | le->claim->data, | ||
349 | le->claim->data_size); | ||
350 | GNUNET_CONTAINER_DLL_insert (result->list_head, | ||
351 | result->list_tail, | ||
352 | result_le); | ||
353 | } | ||
354 | return result; | ||
355 | } | ||
356 | |||
357 | |||
358 | void | ||
359 | GNUNET_RECLAIM_ATTRIBUTE_list_destroy (struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs) | ||
360 | { | ||
361 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *le; | ||
362 | struct GNUNET_RECLAIM_ATTRIBUTE_ClaimListEntry *tmp_le; | ||
363 | |||
364 | for (le = attrs->list_head; NULL != le;) | ||
365 | { | ||
366 | GNUNET_free (le->claim); | ||
367 | tmp_le = le; | ||
368 | le = le->next; | ||
369 | GNUNET_free (tmp_le); | ||
370 | } | ||
371 | GNUNET_free (attrs); | ||
372 | |||
373 | } | ||
374 | |||
375 | size_t | ||
376 | GNUNET_RECLAIM_ATTRIBUTE_serialize_get_size (const struct GNUNET_RECLAIM_ATTRIBUTE_Claim *attr) | ||
377 | { | ||
378 | return sizeof (struct Attribute) | ||
379 | + strlen (attr->name) | ||
380 | + attr->data_size; | ||
381 | } | ||
382 | |||
383 | size_t | ||
384 | GNUNET_RECLAIM_ATTRIBUTE_serialize (const struct GNUNET_RECLAIM_ATTRIBUTE_Claim *attr, | ||
385 | char *result) | ||
386 | { | ||
387 | size_t data_len_ser; | ||
388 | size_t name_len; | ||
389 | struct Attribute *attr_ser; | ||
390 | char* write_ptr; | ||
391 | |||
392 | attr_ser = (struct Attribute*)result; | ||
393 | attr_ser->attribute_type = htons (attr->type); | ||
394 | attr_ser->attribute_version = htonl (attr->version); | ||
395 | name_len = strlen (attr->name); | ||
396 | attr_ser->name_len = htons (name_len); | ||
397 | write_ptr = (char*)&attr_ser[1]; | ||
398 | GNUNET_memcpy (write_ptr, attr->name, name_len); | ||
399 | write_ptr += name_len; | ||
400 | //TODO plugin-ize | ||
401 | //data_len_ser = plugin->serialize_attribute_value (attr, | ||
402 | // &attr_ser[1]); | ||
403 | data_len_ser = attr->data_size; | ||
404 | GNUNET_memcpy (write_ptr, attr->data, attr->data_size); | ||
405 | attr_ser->data_size = htons (data_len_ser); | ||
406 | |||
407 | return sizeof (struct Attribute) + strlen (attr->name) + attr->data_size; | ||
408 | } | ||
409 | |||
410 | struct GNUNET_RECLAIM_ATTRIBUTE_Claim * | ||
411 | GNUNET_RECLAIM_ATTRIBUTE_deserialize (const char* data, | ||
412 | size_t data_size) | ||
413 | { | ||
414 | struct GNUNET_RECLAIM_ATTRIBUTE_Claim *attr; | ||
415 | struct Attribute *attr_ser; | ||
416 | size_t data_len; | ||
417 | size_t name_len; | ||
418 | char* write_ptr; | ||
419 | |||
420 | if (data_size < sizeof (struct Attribute)) | ||
421 | return NULL; | ||
422 | |||
423 | attr_ser = (struct Attribute*)data; | ||
424 | data_len = ntohs (attr_ser->data_size); | ||
425 | name_len = ntohs (attr_ser->name_len); | ||
426 | attr = GNUNET_malloc (sizeof (struct GNUNET_RECLAIM_ATTRIBUTE_Claim) | ||
427 | + data_len + name_len + 1); | ||
428 | attr->type = ntohs (attr_ser->attribute_type); | ||
429 | attr->version = ntohl (attr_ser->attribute_version); | ||
430 | attr->data_size = ntohs (attr_ser->data_size); | ||
431 | |||
432 | write_ptr = (char*)&attr[1]; | ||
433 | GNUNET_memcpy (write_ptr, | ||
434 | &attr_ser[1], | ||
435 | name_len); | ||
436 | write_ptr[name_len] = '\0'; | ||
437 | attr->name = write_ptr; | ||
438 | |||
439 | write_ptr += name_len + 1; | ||
440 | GNUNET_memcpy (write_ptr, | ||
441 | (char*)&attr_ser[1] + name_len, | ||
442 | attr->data_size); | ||
443 | attr->data = write_ptr; | ||
444 | return attr; | ||
445 | |||
446 | } | ||
447 | |||
448 | /* end of reclaim_attribute.c */ | ||