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Diffstat (limited to 'src/json/json_helper.c')
-rw-r--r-- | src/json/json_helper.c | 864 |
1 files changed, 864 insertions, 0 deletions
diff --git a/src/json/json_helper.c b/src/json/json_helper.c new file mode 100644 index 000000000..cf84ae997 --- /dev/null +++ b/src/json/json_helper.c | |||
@@ -0,0 +1,864 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | Copyright (C) 2014, 2015, 2016 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify it under the | ||
6 | terms of the GNU General Public License as published by the Free Software | ||
7 | Foundation; either version 3, or (at your option) any later version. | ||
8 | |||
9 | GNUnet is distributed in the hope that it will be useful, but WITHOUT ANY | ||
10 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR | ||
11 | A PARTICULAR PURPOSE. See the GNU General Public License for more details. | ||
12 | |||
13 | You should have received a copy of the GNU General Public License along with | ||
14 | GNUnet; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/> | ||
15 | */ | ||
16 | /** | ||
17 | * @file json/json_helper.c | ||
18 | * @brief functions to generate specifciations for JSON parsing | ||
19 | * @author Florian Dold | ||
20 | * @author Benedikt Mueller | ||
21 | * @author Christian Grothoff | ||
22 | */ | ||
23 | #include "platform.h" | ||
24 | #include "gnunet_json_lib.h" | ||
25 | |||
26 | |||
27 | /** | ||
28 | * End of a parser specification. | ||
29 | */ | ||
30 | struct GNUNET_JSON_Specification | ||
31 | GNUNET_JSON_spec_end () | ||
32 | { | ||
33 | struct GNUNET_JSON_Specification ret = { | ||
34 | .parser = NULL, | ||
35 | .cleaner = NULL, | ||
36 | .cls = NULL | ||
37 | }; | ||
38 | return ret; | ||
39 | } | ||
40 | |||
41 | |||
42 | /** | ||
43 | * Parse given JSON object to fixed size data | ||
44 | * | ||
45 | * @param cls closure, NULL | ||
46 | * @param root the json object representing data | ||
47 | * @param[out] spec where to write the data | ||
48 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
49 | */ | ||
50 | static int | ||
51 | parse_fixed_data (void *cls, | ||
52 | json_t *root, | ||
53 | struct GNUNET_JSON_Specification *spec) | ||
54 | { | ||
55 | const char *enc; | ||
56 | unsigned int len; | ||
57 | |||
58 | if (NULL == (enc = json_string_value (root))) | ||
59 | { | ||
60 | GNUNET_break_op (0); | ||
61 | return GNUNET_SYSERR; | ||
62 | } | ||
63 | len = strlen (enc); | ||
64 | if (((len * 5) / 8) != spec->ptr_size) | ||
65 | { | ||
66 | GNUNET_break_op (0); | ||
67 | return GNUNET_SYSERR; | ||
68 | } | ||
69 | if (GNUNET_OK != | ||
70 | GNUNET_STRINGS_string_to_data (enc, | ||
71 | len, | ||
72 | spec->ptr, | ||
73 | spec->ptr_size)) | ||
74 | { | ||
75 | GNUNET_break_op (0); | ||
76 | return GNUNET_SYSERR; | ||
77 | } | ||
78 | return GNUNET_OK; | ||
79 | } | ||
80 | |||
81 | |||
82 | /** | ||
83 | * Variable size object (in network byte order, encoded using Crockford | ||
84 | * Base32hex encoding). | ||
85 | * | ||
86 | * @param name name of the JSON field | ||
87 | * @param[out] obj pointer where to write the data, must have @a size bytes | ||
88 | * @param size number of bytes expected in @a obj | ||
89 | */ | ||
90 | struct GNUNET_JSON_Specification | ||
91 | GNUNET_JSON_spec_fixed (const char *name, | ||
92 | void *obj, | ||
93 | size_t size) | ||
94 | { | ||
95 | struct GNUNET_JSON_Specification ret = { | ||
96 | .parser = &parse_fixed_data, | ||
97 | .cleaner = NULL, | ||
98 | .cls = NULL, | ||
99 | .field = name, | ||
100 | .ptr = obj, | ||
101 | .ptr_size = size, | ||
102 | .size_ptr = NULL | ||
103 | }; | ||
104 | return ret; | ||
105 | } | ||
106 | |||
107 | |||
108 | /** | ||
109 | * Parse given JSON object to variable size data | ||
110 | * | ||
111 | * @param cls closure, NULL | ||
112 | * @param root the json object representing data | ||
113 | * @param[out] spec where to write the data | ||
114 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
115 | */ | ||
116 | static int | ||
117 | parse_variable_data (void *cls, | ||
118 | json_t *root, | ||
119 | struct GNUNET_JSON_Specification *spec) | ||
120 | { | ||
121 | const char *str; | ||
122 | size_t size; | ||
123 | void *data; | ||
124 | int res; | ||
125 | |||
126 | str = json_string_value (root); | ||
127 | if (NULL == str) | ||
128 | { | ||
129 | GNUNET_break_op (0); | ||
130 | return GNUNET_SYSERR; | ||
131 | } | ||
132 | size = (strlen (str) * 5) / 8; | ||
133 | if (size >= 1024) | ||
134 | { | ||
135 | GNUNET_break_op (0); | ||
136 | return GNUNET_SYSERR; | ||
137 | } | ||
138 | data = GNUNET_malloc (size); | ||
139 | res = GNUNET_STRINGS_string_to_data (str, | ||
140 | strlen (str), | ||
141 | data, | ||
142 | size); | ||
143 | if (GNUNET_OK != res) | ||
144 | { | ||
145 | GNUNET_break_op (0); | ||
146 | GNUNET_free (data); | ||
147 | return GNUNET_SYSERR; | ||
148 | } | ||
149 | *(void**) spec->ptr = data; | ||
150 | *spec->size_ptr = size; | ||
151 | return GNUNET_OK; | ||
152 | } | ||
153 | |||
154 | |||
155 | /** | ||
156 | * Cleanup data left from parsing variable size data | ||
157 | * | ||
158 | * @param cls closure, NULL | ||
159 | * @param[out] spec where to free the data | ||
160 | */ | ||
161 | static void | ||
162 | clean_variable_data (void *cls, | ||
163 | struct GNUNET_JSON_Specification *spec) | ||
164 | { | ||
165 | if (0 != *spec->size_ptr) | ||
166 | { | ||
167 | GNUNET_free (*(void **) spec->ptr); | ||
168 | *(void**) spec->ptr = NULL; | ||
169 | *spec->size_ptr = 0; | ||
170 | } | ||
171 | } | ||
172 | |||
173 | |||
174 | /** | ||
175 | * Variable size object (in network byte order, encoded using | ||
176 | * Crockford Base32hex encoding). | ||
177 | * | ||
178 | * @param name name of the JSON field | ||
179 | * @param[out] obj pointer where to write the data, will be allocated | ||
180 | * @param[out] size where to store the number of bytes allocated for @a obj | ||
181 | */ | ||
182 | struct GNUNET_JSON_Specification | ||
183 | GNUNET_JSON_spec_varsize (const char *name, | ||
184 | void **obj, | ||
185 | size_t *size) | ||
186 | { | ||
187 | struct GNUNET_JSON_Specification ret = { | ||
188 | .parser = &parse_variable_data, | ||
189 | .cleaner = &clean_variable_data, | ||
190 | .cls = NULL, | ||
191 | .field = name, | ||
192 | .ptr = obj, | ||
193 | .ptr_size = 0, | ||
194 | .size_ptr = size | ||
195 | }; | ||
196 | *obj = NULL; | ||
197 | *size = 0; | ||
198 | return ret; | ||
199 | } | ||
200 | |||
201 | |||
202 | /** | ||
203 | * Parse given JSON object to string. | ||
204 | * | ||
205 | * @param cls closure, NULL | ||
206 | * @param root the json object representing data | ||
207 | * @param[out] spec where to write the data | ||
208 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
209 | */ | ||
210 | static int | ||
211 | parse_string (void *cls, | ||
212 | json_t *root, | ||
213 | struct GNUNET_JSON_Specification *spec) | ||
214 | { | ||
215 | const char *str; | ||
216 | |||
217 | str = json_string_value (root); | ||
218 | if (NULL == str) | ||
219 | { | ||
220 | GNUNET_break_op (0); | ||
221 | return GNUNET_SYSERR; | ||
222 | } | ||
223 | *(const char **) spec->ptr = str; | ||
224 | return GNUNET_OK; | ||
225 | } | ||
226 | |||
227 | |||
228 | /** | ||
229 | * The expected field stores a string. | ||
230 | * | ||
231 | * @param name name of the JSON field | ||
232 | * @param strptr where to store a pointer to the field | ||
233 | */ | ||
234 | struct GNUNET_JSON_Specification | ||
235 | GNUNET_JSON_spec_string (const char *name, | ||
236 | const char **strptr) | ||
237 | { | ||
238 | struct GNUNET_JSON_Specification ret = { | ||
239 | .parser = &parse_string, | ||
240 | .cleaner = NULL, | ||
241 | .cls = NULL, | ||
242 | .field = name, | ||
243 | .ptr = strptr, | ||
244 | .ptr_size = 0, | ||
245 | .size_ptr = NULL | ||
246 | }; | ||
247 | return ret; | ||
248 | } | ||
249 | |||
250 | |||
251 | /** | ||
252 | * Parse given JSON object to a JSON object. (Yes, trivial.) | ||
253 | * | ||
254 | * @param cls closure, NULL | ||
255 | * @param root the json object representing data | ||
256 | * @param[out] spec where to write the data | ||
257 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
258 | */ | ||
259 | static int | ||
260 | parse_object (void *cls, | ||
261 | json_t *root, | ||
262 | struct GNUNET_JSON_Specification *spec) | ||
263 | { | ||
264 | if (! (json_is_object (root) || json_is_array (root)) ) | ||
265 | { | ||
266 | GNUNET_break_op (0); | ||
267 | return GNUNET_SYSERR; | ||
268 | } | ||
269 | json_incref (root); | ||
270 | *(json_t **) spec->ptr = root; | ||
271 | return GNUNET_OK; | ||
272 | } | ||
273 | |||
274 | |||
275 | /** | ||
276 | * Cleanup data left from parsing JSON object. | ||
277 | * | ||
278 | * @param cls closure, NULL | ||
279 | * @param[out] spec where to free the data | ||
280 | */ | ||
281 | static void | ||
282 | clean_object (void *cls, | ||
283 | struct GNUNET_JSON_Specification *spec) | ||
284 | { | ||
285 | json_t **ptr = (json_t **) spec->ptr; | ||
286 | if (NULL != *ptr) | ||
287 | { | ||
288 | json_decref (*ptr); | ||
289 | *ptr = NULL; | ||
290 | } | ||
291 | } | ||
292 | |||
293 | |||
294 | /** | ||
295 | * JSON object. | ||
296 | * | ||
297 | * @param name name of the JSON field | ||
298 | * @param[out] jsonp where to store the JSON found under @a name | ||
299 | */ | ||
300 | struct GNUNET_JSON_Specification | ||
301 | GNUNET_JSON_spec_json (const char *name, | ||
302 | json_t **jsonp) | ||
303 | { | ||
304 | struct GNUNET_JSON_Specification ret = { | ||
305 | .parser = &parse_object, | ||
306 | .cleaner = &clean_object, | ||
307 | .cls = NULL, | ||
308 | .field = name, | ||
309 | .ptr = jsonp, | ||
310 | .ptr_size = 0, | ||
311 | .size_ptr = NULL | ||
312 | }; | ||
313 | return ret; | ||
314 | } | ||
315 | |||
316 | |||
317 | /** | ||
318 | * Parse given JSON object to a uint8_t. | ||
319 | * | ||
320 | * @param cls closure, NULL | ||
321 | * @param root the json object representing data | ||
322 | * @param[out] spec where to write the data | ||
323 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
324 | */ | ||
325 | static int | ||
326 | parse_u8 (void *cls, | ||
327 | json_t *root, | ||
328 | struct GNUNET_JSON_Specification *spec) | ||
329 | { | ||
330 | json_int_t val; | ||
331 | uint8_t *up = spec->ptr; | ||
332 | |||
333 | if (! json_is_integer (root)) | ||
334 | { | ||
335 | GNUNET_break_op (0); | ||
336 | return GNUNET_SYSERR; | ||
337 | } | ||
338 | val = json_integer_value (root); | ||
339 | if ( (0 > val) || (val > UINT8_MAX) ) | ||
340 | { | ||
341 | GNUNET_break_op (0); | ||
342 | return GNUNET_SYSERR; | ||
343 | } | ||
344 | *up = (uint8_t) val; | ||
345 | return GNUNET_OK; | ||
346 | } | ||
347 | |||
348 | |||
349 | /** | ||
350 | * 8-bit integer. | ||
351 | * | ||
352 | * @param name name of the JSON field | ||
353 | * @param[out] u8 where to store the integer found under @a name | ||
354 | */ | ||
355 | struct GNUNET_JSON_Specification | ||
356 | GNUNET_JSON_spec_uint8 (const char *name, | ||
357 | uint8_t *u8) | ||
358 | { | ||
359 | struct GNUNET_JSON_Specification ret = { | ||
360 | .parser = &parse_u8, | ||
361 | .cleaner = NULL, | ||
362 | .cls = NULL, | ||
363 | .field = name, | ||
364 | .ptr = u8, | ||
365 | .ptr_size = sizeof (uint8_t), | ||
366 | .size_ptr = NULL | ||
367 | }; | ||
368 | return ret; | ||
369 | } | ||
370 | |||
371 | |||
372 | /** | ||
373 | * Parse given JSON object to a uint16_t. | ||
374 | * | ||
375 | * @param cls closure, NULL | ||
376 | * @param root the json object representing data | ||
377 | * @param[out] spec where to write the data | ||
378 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
379 | */ | ||
380 | static int | ||
381 | parse_u16 (void *cls, | ||
382 | json_t *root, | ||
383 | struct GNUNET_JSON_Specification *spec) | ||
384 | { | ||
385 | json_int_t val; | ||
386 | uint16_t *up = spec->ptr; | ||
387 | |||
388 | if (! json_is_integer (root)) | ||
389 | { | ||
390 | GNUNET_break_op (0); | ||
391 | return GNUNET_SYSERR; | ||
392 | } | ||
393 | val = json_integer_value (root); | ||
394 | if ( (0 > val) || (val > UINT16_MAX) ) | ||
395 | { | ||
396 | GNUNET_break_op (0); | ||
397 | return GNUNET_SYSERR; | ||
398 | } | ||
399 | *up = (uint16_t) val; | ||
400 | return GNUNET_OK; | ||
401 | } | ||
402 | |||
403 | |||
404 | /** | ||
405 | * 16-bit integer. | ||
406 | * | ||
407 | * @param name name of the JSON field | ||
408 | * @param[out] u16 where to store the integer found under @a name | ||
409 | */ | ||
410 | struct GNUNET_JSON_Specification | ||
411 | GNUNET_JSON_spec_uint16 (const char *name, | ||
412 | uint16_t *u16) | ||
413 | { | ||
414 | struct GNUNET_JSON_Specification ret = { | ||
415 | .parser = &parse_u16, | ||
416 | .cleaner = NULL, | ||
417 | .cls = NULL, | ||
418 | .field = name, | ||
419 | .ptr = u16, | ||
420 | .ptr_size = sizeof (uint16_t), | ||
421 | .size_ptr = NULL | ||
422 | }; | ||
423 | return ret; | ||
424 | } | ||
425 | |||
426 | |||
427 | /** | ||
428 | * Parse given JSON object to a uint32_t. | ||
429 | * | ||
430 | * @param cls closure, NULL | ||
431 | * @param root the json object representing data | ||
432 | * @param[out] spec where to write the data | ||
433 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
434 | */ | ||
435 | static int | ||
436 | parse_u32 (void *cls, | ||
437 | json_t *root, | ||
438 | struct GNUNET_JSON_Specification *spec) | ||
439 | { | ||
440 | json_int_t val; | ||
441 | uint32_t *up = spec->ptr; | ||
442 | |||
443 | if (! json_is_integer (root)) | ||
444 | { | ||
445 | GNUNET_break_op (0); | ||
446 | return GNUNET_SYSERR; | ||
447 | } | ||
448 | val = json_integer_value (root); | ||
449 | if ( (0 > val) || (val > UINT32_MAX) ) | ||
450 | { | ||
451 | GNUNET_break_op (0); | ||
452 | return GNUNET_SYSERR; | ||
453 | } | ||
454 | *up = (uint32_t) val; | ||
455 | return GNUNET_OK; | ||
456 | } | ||
457 | |||
458 | |||
459 | /** | ||
460 | * 32-bit integer. | ||
461 | * | ||
462 | * @param name name of the JSON field | ||
463 | * @param[out] u32 where to store the integer found under @a name | ||
464 | */ | ||
465 | struct GNUNET_JSON_Specification | ||
466 | GNUNET_JSON_spec_uint32 (const char *name, | ||
467 | uint32_t *u32) | ||
468 | { | ||
469 | struct GNUNET_JSON_Specification ret = { | ||
470 | .parser = &parse_u32, | ||
471 | .cleaner = NULL, | ||
472 | .cls = NULL, | ||
473 | .field = name, | ||
474 | .ptr = u32, | ||
475 | .ptr_size = sizeof (uint32_t), | ||
476 | .size_ptr = NULL | ||
477 | }; | ||
478 | return ret; | ||
479 | } | ||
480 | |||
481 | |||
482 | /** | ||
483 | * Parse given JSON object to a uint8_t. | ||
484 | * | ||
485 | * @param cls closure, NULL | ||
486 | * @param root the json object representing data | ||
487 | * @param[out] spec where to write the data | ||
488 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
489 | */ | ||
490 | static int | ||
491 | parse_u64 (void *cls, | ||
492 | json_t *root, | ||
493 | struct GNUNET_JSON_Specification *spec) | ||
494 | { | ||
495 | json_int_t val; | ||
496 | uint64_t *up = spec->ptr; | ||
497 | |||
498 | if (! json_is_integer (root)) | ||
499 | { | ||
500 | GNUNET_break_op (0); | ||
501 | return GNUNET_SYSERR; | ||
502 | } | ||
503 | val = json_integer_value (root); | ||
504 | *up = (uint64_t) val; | ||
505 | return GNUNET_OK; | ||
506 | } | ||
507 | |||
508 | |||
509 | /** | ||
510 | * 64-bit integer. | ||
511 | * | ||
512 | * @param name name of the JSON field | ||
513 | * @param[out] u64 where to store the integer found under @a name | ||
514 | */ | ||
515 | struct GNUNET_JSON_Specification | ||
516 | GNUNET_JSON_spec_uint64 (const char *name, | ||
517 | uint64_t *u64) | ||
518 | { | ||
519 | struct GNUNET_JSON_Specification ret = { | ||
520 | .parser = &parse_u64, | ||
521 | .cleaner = NULL, | ||
522 | .cls = NULL, | ||
523 | .field = name, | ||
524 | .ptr = u64, | ||
525 | .ptr_size = sizeof (uint64_t), | ||
526 | .size_ptr = NULL | ||
527 | }; | ||
528 | return ret; | ||
529 | } | ||
530 | |||
531 | |||
532 | /* ************ GNUnet-specific parser specifications ******************* */ | ||
533 | |||
534 | /** | ||
535 | * Parse given JSON object to absolute time. | ||
536 | * | ||
537 | * @param cls closure, NULL | ||
538 | * @param root the json object representing data | ||
539 | * @param[out] spec where to write the data | ||
540 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
541 | */ | ||
542 | static int | ||
543 | parse_abs_time (void *cls, | ||
544 | json_t *root, | ||
545 | struct GNUNET_JSON_Specification *spec) | ||
546 | { | ||
547 | struct GNUNET_TIME_Absolute *abs = spec->ptr; | ||
548 | const char *val; | ||
549 | unsigned long long int tval; | ||
550 | |||
551 | val = json_string_value (root); | ||
552 | if (NULL == val) | ||
553 | { | ||
554 | GNUNET_break_op (0); | ||
555 | return GNUNET_SYSERR; | ||
556 | } | ||
557 | if ( (0 == strcasecmp (val, | ||
558 | "/forever/")) || | ||
559 | (0 == strcasecmp (val, | ||
560 | "/end of time/")) || | ||
561 | (0 == strcasecmp (val, | ||
562 | "/never/")) ) | ||
563 | { | ||
564 | *abs = GNUNET_TIME_UNIT_FOREVER_ABS; | ||
565 | return GNUNET_OK; | ||
566 | } | ||
567 | if (1 != sscanf (val, | ||
568 | "/Date(%llu)/", | ||
569 | &tval)) | ||
570 | { | ||
571 | GNUNET_break_op (0); | ||
572 | return GNUNET_SYSERR; | ||
573 | } | ||
574 | /* Time is in seconds in JSON, but in microseconds in GNUNET_TIME_Absolute */ | ||
575 | abs->abs_value_us = tval * 1000LL * 1000LL; | ||
576 | if ( (abs->abs_value_us) / 1000LL / 1000LL != tval) | ||
577 | { | ||
578 | /* Integer overflow */ | ||
579 | GNUNET_break_op (0); | ||
580 | return GNUNET_SYSERR; | ||
581 | } | ||
582 | return GNUNET_OK; | ||
583 | } | ||
584 | |||
585 | |||
586 | /** | ||
587 | * Absolute time. | ||
588 | * | ||
589 | * @param name name of the JSON field | ||
590 | * @param[out] at where to store the absolute time found under @a name | ||
591 | */ | ||
592 | struct GNUNET_JSON_Specification | ||
593 | GNUNET_JSON_spec_absolute_time (const char *name, | ||
594 | struct GNUNET_TIME_Absolute *at) | ||
595 | { | ||
596 | struct GNUNET_JSON_Specification ret = { | ||
597 | .parser = &parse_abs_time, | ||
598 | .cleaner = NULL, | ||
599 | .cls = NULL, | ||
600 | .field = name, | ||
601 | .ptr = at, | ||
602 | .ptr_size = sizeof (uint64_t), | ||
603 | .size_ptr = NULL | ||
604 | }; | ||
605 | return ret; | ||
606 | } | ||
607 | |||
608 | |||
609 | /** | ||
610 | * Parse given JSON object to relative time. | ||
611 | * | ||
612 | * @param cls closure, NULL | ||
613 | * @param root the json object representing data | ||
614 | * @param[out] spec where to write the data | ||
615 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
616 | */ | ||
617 | static int | ||
618 | parse_rel_time (void *cls, | ||
619 | json_t *root, | ||
620 | struct GNUNET_JSON_Specification *spec) | ||
621 | { | ||
622 | struct GNUNET_TIME_Relative *rel = spec->ptr; | ||
623 | const char *val; | ||
624 | unsigned long long int tval; | ||
625 | |||
626 | val = json_string_value (root); | ||
627 | if (NULL == val) | ||
628 | { | ||
629 | GNUNET_break_op (0); | ||
630 | return GNUNET_SYSERR; | ||
631 | } | ||
632 | if ( (0 == strcasecmp (val, | ||
633 | "/forever/")) ) | ||
634 | { | ||
635 | *rel = GNUNET_TIME_UNIT_FOREVER_REL; | ||
636 | return GNUNET_OK; | ||
637 | } | ||
638 | if (1 != sscanf (val, | ||
639 | "/Delay(%llu)/", | ||
640 | &tval)) | ||
641 | { | ||
642 | GNUNET_break_op (0); | ||
643 | return GNUNET_SYSERR; | ||
644 | } | ||
645 | /* Time is in seconds in JSON, but in microseconds in GNUNET_TIME_Relative */ | ||
646 | rel->rel_value_us = tval * 1000LL * 1000LL; | ||
647 | if ( (rel->rel_value_us) / 1000LL / 1000LL != tval) | ||
648 | { | ||
649 | /* Integer overflow */ | ||
650 | GNUNET_break_op (0); | ||
651 | return GNUNET_SYSERR; | ||
652 | } | ||
653 | return GNUNET_OK; | ||
654 | } | ||
655 | |||
656 | |||
657 | /** | ||
658 | * Relative time. | ||
659 | * | ||
660 | * @param name name of the JSON field | ||
661 | * @param[out] rt where to store the relative time found under @a name | ||
662 | */ | ||
663 | struct GNUNET_JSON_Specification | ||
664 | GNUNET_JSON_spec_relative_time (const char *name, | ||
665 | struct GNUNET_TIME_Relative *rt) | ||
666 | { | ||
667 | struct GNUNET_JSON_Specification ret = { | ||
668 | .parser = &parse_rel_time, | ||
669 | .cleaner = NULL, | ||
670 | .cls = NULL, | ||
671 | .field = name, | ||
672 | .ptr = rt, | ||
673 | .ptr_size = sizeof (uint64_t), | ||
674 | .size_ptr = NULL | ||
675 | }; | ||
676 | return ret; | ||
677 | } | ||
678 | |||
679 | |||
680 | /** | ||
681 | * Parse given JSON object to RSA public key. | ||
682 | * | ||
683 | * @param cls closure, NULL | ||
684 | * @param root the json object representing data | ||
685 | * @param[out] spec where to write the data | ||
686 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
687 | */ | ||
688 | static int | ||
689 | parse_rsa_public_key (void *cls, | ||
690 | json_t *root, | ||
691 | struct GNUNET_JSON_Specification *spec) | ||
692 | { | ||
693 | struct GNUNET_CRYPTO_rsa_PublicKey **pk = spec->ptr; | ||
694 | const char *enc; | ||
695 | char *buf; | ||
696 | size_t len; | ||
697 | size_t buf_len; | ||
698 | |||
699 | if (NULL == (enc = json_string_value (root))) | ||
700 | { | ||
701 | GNUNET_break_op (0); | ||
702 | return GNUNET_SYSERR; | ||
703 | } | ||
704 | len = strlen (enc); | ||
705 | buf_len = (len * 5) / 8; | ||
706 | buf = GNUNET_malloc (buf_len); | ||
707 | if (GNUNET_OK != | ||
708 | GNUNET_STRINGS_string_to_data (enc, | ||
709 | len, | ||
710 | buf, | ||
711 | buf_len)) | ||
712 | { | ||
713 | GNUNET_break_op (0); | ||
714 | GNUNET_free (buf); | ||
715 | return GNUNET_SYSERR; | ||
716 | } | ||
717 | if (NULL == (*pk = GNUNET_CRYPTO_rsa_public_key_decode (buf, | ||
718 | buf_len))) | ||
719 | { | ||
720 | GNUNET_break_op (0); | ||
721 | GNUNET_free (buf); | ||
722 | return GNUNET_SYSERR; | ||
723 | } | ||
724 | GNUNET_free (buf); | ||
725 | return GNUNET_OK; | ||
726 | } | ||
727 | |||
728 | |||
729 | /** | ||
730 | * Cleanup data left from parsing RSA public key. | ||
731 | * | ||
732 | * @param cls closure, NULL | ||
733 | * @param[out] spec where to free the data | ||
734 | */ | ||
735 | static void | ||
736 | clean_rsa_public_key (void *cls, | ||
737 | struct GNUNET_JSON_Specification *spec) | ||
738 | { | ||
739 | struct GNUNET_CRYPTO_rsa_PublicKey **pk = spec->ptr; | ||
740 | |||
741 | if (NULL != *pk) | ||
742 | { | ||
743 | GNUNET_CRYPTO_rsa_public_key_free (*pk); | ||
744 | *pk = NULL; | ||
745 | } | ||
746 | } | ||
747 | |||
748 | |||
749 | /** | ||
750 | * Specification for parsing an RSA public key. | ||
751 | * | ||
752 | * @param name name of the JSON field | ||
753 | * @param pk where to store the RSA key found under @a name | ||
754 | */ | ||
755 | struct GNUNET_JSON_Specification | ||
756 | GNUNET_JSON_spec_rsa_public_key (const char *name, | ||
757 | struct GNUNET_CRYPTO_rsa_PublicKey **pk) | ||
758 | { | ||
759 | struct GNUNET_JSON_Specification ret = { | ||
760 | .parser = &parse_rsa_public_key, | ||
761 | .cleaner = &clean_rsa_public_key, | ||
762 | .cls = NULL, | ||
763 | .field = name, | ||
764 | .ptr = pk, | ||
765 | .ptr_size = 0, | ||
766 | .size_ptr = NULL | ||
767 | }; | ||
768 | return ret; | ||
769 | } | ||
770 | |||
771 | |||
772 | /** | ||
773 | * Parse given JSON object to RSA signature. | ||
774 | * | ||
775 | * @param cls closure, NULL | ||
776 | * @param root the json object representing data | ||
777 | * @param[out] spec where to write the data | ||
778 | * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error | ||
779 | */ | ||
780 | static int | ||
781 | parse_rsa_signature (void *cls, | ||
782 | json_t *root, | ||
783 | struct GNUNET_JSON_Specification *spec) | ||
784 | { | ||
785 | struct GNUNET_CRYPTO_rsa_Signature **sig = spec->ptr; | ||
786 | size_t size; | ||
787 | const char *str; | ||
788 | int res; | ||
789 | void *buf; | ||
790 | |||
791 | str = json_string_value (root); | ||
792 | if (NULL == str) | ||
793 | { | ||
794 | GNUNET_break_op (0); | ||
795 | return GNUNET_SYSERR; | ||
796 | } | ||
797 | size = (strlen (str) * 5) / 8; | ||
798 | buf = GNUNET_malloc (size); | ||
799 | res = GNUNET_STRINGS_string_to_data (str, | ||
800 | strlen (str), | ||
801 | buf, | ||
802 | size); | ||
803 | if (GNUNET_OK != res) | ||
804 | { | ||
805 | GNUNET_free (buf); | ||
806 | GNUNET_break_op (0); | ||
807 | return GNUNET_SYSERR; | ||
808 | } | ||
809 | if (NULL == (*sig = GNUNET_CRYPTO_rsa_signature_decode (buf, | ||
810 | size))) | ||
811 | { | ||
812 | GNUNET_break_op (0); | ||
813 | GNUNET_free (buf); | ||
814 | return GNUNET_SYSERR; | ||
815 | } | ||
816 | GNUNET_free (buf); | ||
817 | return GNUNET_OK; | ||
818 | } | ||
819 | |||
820 | |||
821 | /** | ||
822 | * Cleanup data left from parsing RSA signature. | ||
823 | * | ||
824 | * @param cls closure, NULL | ||
825 | * @param[out] spec where to free the data | ||
826 | */ | ||
827 | static void | ||
828 | clean_rsa_signature (void *cls, | ||
829 | struct GNUNET_JSON_Specification *spec) | ||
830 | { | ||
831 | struct GNUNET_CRYPTO_rsa_Signature **sig = spec->ptr; | ||
832 | |||
833 | if (NULL != *sig) | ||
834 | { | ||
835 | GNUNET_CRYPTO_rsa_signature_free (*sig); | ||
836 | *sig = NULL; | ||
837 | } | ||
838 | } | ||
839 | |||
840 | |||
841 | /** | ||
842 | * Specification for parsing an RSA signature. | ||
843 | * | ||
844 | * @param name name of the JSON field | ||
845 | * @param sig where to store the RSA signature found under @a name | ||
846 | */ | ||
847 | struct GNUNET_JSON_Specification | ||
848 | GNUNET_JSON_spec_rsa_signature (const char *name, | ||
849 | struct GNUNET_CRYPTO_rsa_Signature **sig) | ||
850 | { | ||
851 | struct GNUNET_JSON_Specification ret = { | ||
852 | .parser = &parse_rsa_signature, | ||
853 | .cleaner = &clean_rsa_signature, | ||
854 | .cls = NULL, | ||
855 | .field = name, | ||
856 | .ptr = sig, | ||
857 | .ptr_size = 0, | ||
858 | .size_ptr = NULL | ||
859 | }; | ||
860 | return ret; | ||
861 | } | ||
862 | |||
863 | |||
864 | /* end of json_helper.c */ | ||