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Diffstat (limited to 'src/abd/abd_serialization.c')
-rw-r--r-- | src/abd/abd_serialization.c | 516 |
1 files changed, 0 insertions, 516 deletions
diff --git a/src/abd/abd_serialization.c b/src/abd/abd_serialization.c deleted file mode 100644 index c03fab7dc..000000000 --- a/src/abd/abd_serialization.c +++ /dev/null | |||
@@ -1,516 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2009-2013, 2016 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 | /** | ||
23 | * @file abd/abd_serialization.c | ||
24 | * @brief API to serialize and deserialize delegation chains | ||
25 | * and abds | ||
26 | * @author Martin Schanzenbach | ||
27 | */ | ||
28 | #include "platform.h" | ||
29 | #include "gnunet_util_lib.h" | ||
30 | #include "gnunet_constants.h" | ||
31 | #include "gnunet_abd_service.h" | ||
32 | #include "gnunet_signatures.h" | ||
33 | #include "abd.h" | ||
34 | |||
35 | /** | ||
36 | * Calculate how many bytes we will need to serialize | ||
37 | * the given delegation chain | ||
38 | * | ||
39 | * @param ds_count number of delegation chain entries | ||
40 | * @param dsr array of #GNUNET_ABD_DelegationSet | ||
41 | * @return the required size to serialize | ||
42 | */ | ||
43 | size_t | ||
44 | GNUNET_ABD_delegation_set_get_size ( | ||
45 | unsigned int ds_count, | ||
46 | const struct GNUNET_ABD_DelegationSet *dsr) | ||
47 | { | ||
48 | unsigned int i; | ||
49 | size_t ret; | ||
50 | |||
51 | ret = sizeof (struct DelegationRecordData) * (ds_count); | ||
52 | |||
53 | for (i = 0; i < ds_count; i++) | ||
54 | { | ||
55 | GNUNET_assert ((ret + dsr[i].subject_attribute_len) >= ret); | ||
56 | ret += dsr[i].subject_attribute_len; | ||
57 | } | ||
58 | return ret; | ||
59 | } | ||
60 | |||
61 | |||
62 | /** | ||
63 | * Serizalize the given delegation chain entries and abd | ||
64 | * | ||
65 | * @param d_count number of delegation chain entries | ||
66 | * @param dsr array of #GNUNET_ABD_DelegationSet | ||
67 | * @param dest_size size of the destination | ||
68 | * @param dest where to store the result | ||
69 | * @return the size of the data, -1 on failure | ||
70 | */ | ||
71 | ssize_t | ||
72 | GNUNET_ABD_delegation_set_serialize ( | ||
73 | unsigned int d_count, | ||
74 | const struct GNUNET_ABD_DelegationSet *dsr, | ||
75 | size_t dest_size, | ||
76 | char *dest) | ||
77 | { | ||
78 | struct DelegationRecordData rec; | ||
79 | unsigned int i; | ||
80 | size_t off; | ||
81 | |||
82 | off = 0; | ||
83 | for (i = 0; i < d_count; i++) | ||
84 | { | ||
85 | rec.subject_attribute_len = htonl ((uint32_t) dsr[i].subject_attribute_len); | ||
86 | rec.subject_key = dsr[i].subject_key; | ||
87 | if (off + sizeof (rec) > dest_size) | ||
88 | return -1; | ||
89 | GNUNET_memcpy (&dest[off], &rec, sizeof (rec)); | ||
90 | off += sizeof (rec); | ||
91 | if (0 == dsr[i].subject_attribute_len) | ||
92 | continue; | ||
93 | if (off + dsr[i].subject_attribute_len > dest_size) | ||
94 | return -1; | ||
95 | GNUNET_memcpy (&dest[off], | ||
96 | dsr[i].subject_attribute, | ||
97 | dsr[i].subject_attribute_len); | ||
98 | off += dsr[i].subject_attribute_len; | ||
99 | } | ||
100 | return off; | ||
101 | } | ||
102 | |||
103 | |||
104 | /** | ||
105 | * Deserialize the given destination | ||
106 | * | ||
107 | * @param len size of the serialized delegation chain and cred | ||
108 | * @param src the serialized data | ||
109 | * @param d_count the number of delegation chain entries | ||
110 | * @param dsr where to put the delegation chain entries | ||
111 | * @return #GNUNET_OK on success, #GNUNET_SYSERR on error | ||
112 | */ | ||
113 | int | ||
114 | GNUNET_ABD_delegation_set_deserialize ( | ||
115 | size_t len, | ||
116 | const char *src, | ||
117 | unsigned int d_count, | ||
118 | struct GNUNET_ABD_DelegationSet *dsr) | ||
119 | { | ||
120 | struct DelegationRecordData rec; | ||
121 | unsigned int i; | ||
122 | size_t off; | ||
123 | |||
124 | off = 0; | ||
125 | for (i = 0; i < d_count; i++) | ||
126 | { | ||
127 | if (off + sizeof (rec) > len) | ||
128 | return GNUNET_SYSERR; | ||
129 | GNUNET_memcpy (&rec, &src[off], sizeof (rec)); | ||
130 | dsr[i].subject_key = rec.subject_key; | ||
131 | off += sizeof (rec); | ||
132 | dsr[i].subject_attribute_len = ntohl ((uint32_t) rec.subject_attribute_len); | ||
133 | if (off + dsr[i].subject_attribute_len > len) | ||
134 | return GNUNET_SYSERR; | ||
135 | dsr[i].subject_attribute = (char *) &src[off]; | ||
136 | off += dsr[i].subject_attribute_len; | ||
137 | } | ||
138 | return GNUNET_OK; | ||
139 | } | ||
140 | |||
141 | |||
142 | /** | ||
143 | * Calculate how many bytes we will need to serialize | ||
144 | * the abds | ||
145 | * | ||
146 | * @param c_count number of abd entries | ||
147 | * @param cd a #GNUNET_ABD_Credential | ||
148 | * @return the required size to serialize | ||
149 | */ | ||
150 | size_t | ||
151 | GNUNET_ABD_delegates_get_size ( | ||
152 | unsigned int c_count, | ||
153 | const struct GNUNET_ABD_Delegate *cd) | ||
154 | { | ||
155 | unsigned int i; | ||
156 | size_t ret; | ||
157 | |||
158 | ret = sizeof (struct DelegateEntry) * (c_count); | ||
159 | |||
160 | for (i = 0; i < c_count; i++) | ||
161 | { | ||
162 | GNUNET_assert ((ret + cd[i].issuer_attribute_len | ||
163 | + cd[i].subject_attribute_len) >= ret); | ||
164 | // subject_attribute_len should be 0 | ||
165 | ret += cd[i].issuer_attribute_len + cd[i].subject_attribute_len; | ||
166 | } | ||
167 | return ret; | ||
168 | } | ||
169 | |||
170 | |||
171 | /** | ||
172 | * Serizalize the given abds | ||
173 | * | ||
174 | * @param c_count number of abd entries | ||
175 | * @param cd a #GNUNET_ABD_Credential | ||
176 | * @param dest_size size of the destination | ||
177 | * @param dest where to store the result | ||
178 | * @return the size of the data, -1 on failure | ||
179 | */ | ||
180 | ssize_t | ||
181 | GNUNET_ABD_delegates_serialize ( | ||
182 | unsigned int c_count, | ||
183 | const struct GNUNET_ABD_Delegate *cd, | ||
184 | size_t dest_size, | ||
185 | char *dest) | ||
186 | { | ||
187 | struct DelegateEntry c_rec; | ||
188 | unsigned int i; | ||
189 | size_t off; | ||
190 | |||
191 | off = 0; | ||
192 | for (i = 0; i < c_count; i++) | ||
193 | { | ||
194 | // c_rec.subject_attribute_len = htonl ((uint32_t) cd[i].subject_attribute_len); | ||
195 | c_rec.issuer_attribute_len = htonl ((uint32_t) cd[i].issuer_attribute_len); | ||
196 | c_rec.issuer_key = cd[i].issuer_key; | ||
197 | c_rec.subject_key = cd[i].subject_key; | ||
198 | c_rec.signature = cd[i].signature; | ||
199 | c_rec.purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_DELEGATE); | ||
200 | c_rec.purpose.size = | ||
201 | htonl ((sizeof (struct DelegateEntry) + cd[i].issuer_attribute_len) | ||
202 | - sizeof (struct GNUNET_CRYPTO_EcdsaSignature)); | ||
203 | c_rec.expiration = GNUNET_htonll (cd[i].expiration.abs_value_us); | ||
204 | if (off + sizeof (c_rec) > dest_size) | ||
205 | return -1; | ||
206 | GNUNET_memcpy (&dest[off], &c_rec, sizeof (c_rec)); | ||
207 | off += sizeof (c_rec); | ||
208 | if (off + cd[i].issuer_attribute_len > dest_size) | ||
209 | return -1; | ||
210 | GNUNET_memcpy (&dest[off], | ||
211 | cd[i].issuer_attribute, | ||
212 | cd[i].issuer_attribute_len); | ||
213 | off += cd[i].issuer_attribute_len; | ||
214 | } | ||
215 | |||
216 | return off; | ||
217 | } | ||
218 | |||
219 | |||
220 | /** | ||
221 | * Deserialize the given destination | ||
222 | * | ||
223 | * @param len size of the serialized creds | ||
224 | * @param src the serialized data | ||
225 | * @param c_count the number of abd entries | ||
226 | * @param cd where to put the abd data | ||
227 | * @return #GNUNET_OK on success, #GNUNET_SYSERR on error | ||
228 | */ | ||
229 | int | ||
230 | GNUNET_ABD_delegates_deserialize (size_t len, | ||
231 | const char *src, | ||
232 | unsigned int c_count, | ||
233 | struct GNUNET_ABD_Delegate *cd) | ||
234 | { | ||
235 | struct DelegateEntry c_rec; | ||
236 | unsigned int i; | ||
237 | size_t off; | ||
238 | |||
239 | off = 0; | ||
240 | for (i = 0; i < c_count; i++) | ||
241 | { | ||
242 | if (off + sizeof (c_rec) > len) | ||
243 | return GNUNET_SYSERR; | ||
244 | GNUNET_memcpy (&c_rec, &src[off], sizeof (c_rec)); | ||
245 | cd[i].issuer_attribute_len = ntohl ((uint32_t) c_rec.issuer_attribute_len); | ||
246 | cd[i].issuer_key = c_rec.issuer_key; | ||
247 | cd[i].subject_key = c_rec.subject_key; | ||
248 | cd[i].signature = c_rec.signature; | ||
249 | cd[i].expiration.abs_value_us = GNUNET_ntohll (c_rec.expiration); | ||
250 | off += sizeof (c_rec); | ||
251 | if (off + cd[i].issuer_attribute_len > len) | ||
252 | return GNUNET_SYSERR; | ||
253 | cd[i].issuer_attribute = &src[off]; | ||
254 | off += cd[i].issuer_attribute_len; | ||
255 | cd[i].subject_attribute_len = 0; | ||
256 | } | ||
257 | return GNUNET_OK; | ||
258 | } | ||
259 | |||
260 | |||
261 | /** | ||
262 | * Calculate how many bytes we will need to serialize | ||
263 | * the given delegation chain and abd | ||
264 | * | ||
265 | * @param d_count number of delegation chain entries | ||
266 | * @param dd array of #GNUNET_ABD_Delegation | ||
267 | * @param c_count number of abd entries | ||
268 | * @param cd a #GNUNET_ABD_Credential | ||
269 | * @return the required size to serialize | ||
270 | */ | ||
271 | size_t | ||
272 | GNUNET_ABD_delegation_chain_get_size ( | ||
273 | unsigned int d_count, | ||
274 | const struct GNUNET_ABD_Delegation *dd, | ||
275 | unsigned int c_count, | ||
276 | const struct GNUNET_ABD_Delegate *cd) | ||
277 | { | ||
278 | unsigned int i; | ||
279 | size_t ret; | ||
280 | |||
281 | ret = sizeof (struct ChainEntry) * (d_count); | ||
282 | |||
283 | for (i = 0; i < d_count; i++) | ||
284 | { | ||
285 | GNUNET_assert ( | ||
286 | (ret + dd[i].issuer_attribute_len + dd[i].subject_attribute_len) >= ret); | ||
287 | ret += dd[i].issuer_attribute_len + dd[i].subject_attribute_len; | ||
288 | } | ||
289 | return ret + GNUNET_ABD_delegates_get_size (c_count, cd); | ||
290 | } | ||
291 | |||
292 | |||
293 | /** | ||
294 | * Serizalize the given delegation chain entries and abd | ||
295 | * | ||
296 | * @param d_count number of delegation chain entries | ||
297 | * @param dd array of #GNUNET_ABD_Delegation | ||
298 | * @param c_count number of abd entries | ||
299 | * @param cd a #GNUNET_ABD_Credential | ||
300 | * @param dest_size size of the destination | ||
301 | * @param dest where to store the result | ||
302 | * @return the size of the data, -1 on failure | ||
303 | */ | ||
304 | ssize_t | ||
305 | GNUNET_ABD_delegation_chain_serialize ( | ||
306 | unsigned int d_count, | ||
307 | const struct GNUNET_ABD_Delegation *dd, | ||
308 | unsigned int c_count, | ||
309 | const struct GNUNET_ABD_Delegate *cd, | ||
310 | size_t dest_size, | ||
311 | char *dest) | ||
312 | { | ||
313 | struct ChainEntry rec; | ||
314 | unsigned int i; | ||
315 | size_t off; | ||
316 | |||
317 | off = 0; | ||
318 | for (i = 0; i < d_count; i++) | ||
319 | { | ||
320 | rec.issuer_attribute_len = htonl ((uint32_t) dd[i].issuer_attribute_len); | ||
321 | rec.subject_attribute_len = htonl ((uint32_t) dd[i].subject_attribute_len); | ||
322 | rec.issuer_key = dd[i].issuer_key; | ||
323 | rec.subject_key = dd[i].subject_key; | ||
324 | if (off + sizeof (rec) > dest_size) | ||
325 | return -1; | ||
326 | GNUNET_memcpy (&dest[off], &rec, sizeof (rec)); | ||
327 | off += sizeof (rec); | ||
328 | if (off + dd[i].issuer_attribute_len > dest_size) | ||
329 | return -1; | ||
330 | GNUNET_memcpy (&dest[off], | ||
331 | dd[i].issuer_attribute, | ||
332 | dd[i].issuer_attribute_len); | ||
333 | off += dd[i].issuer_attribute_len; | ||
334 | if (0 == dd[i].subject_attribute_len) | ||
335 | continue; | ||
336 | if (off + dd[i].subject_attribute_len > dest_size) | ||
337 | return -1; | ||
338 | GNUNET_memcpy (&dest[off], | ||
339 | dd[i].subject_attribute, | ||
340 | dd[i].subject_attribute_len); | ||
341 | off += dd[i].subject_attribute_len; | ||
342 | } | ||
343 | return off + GNUNET_ABD_delegates_serialize (c_count, | ||
344 | cd, | ||
345 | dest_size - off, | ||
346 | &dest[off]); | ||
347 | } | ||
348 | |||
349 | |||
350 | /** | ||
351 | * Deserialize the given destination | ||
352 | * | ||
353 | * @param len size of the serialized delegation chain and cred | ||
354 | * @param src the serialized data | ||
355 | * @param d_count the number of delegation chain entries | ||
356 | * @param dd where to put the delegation chain entries | ||
357 | * @param c_count the number of abd entries | ||
358 | * @param cd where to put the abd data | ||
359 | * @return #GNUNET_OK on success, #GNUNET_SYSERR on error | ||
360 | */ | ||
361 | int | ||
362 | GNUNET_ABD_delegation_chain_deserialize ( | ||
363 | size_t len, | ||
364 | const char *src, | ||
365 | unsigned int d_count, | ||
366 | struct GNUNET_ABD_Delegation *dd, | ||
367 | unsigned int c_count, | ||
368 | struct GNUNET_ABD_Delegate *cd) | ||
369 | { | ||
370 | struct ChainEntry rec; | ||
371 | unsigned int i; | ||
372 | size_t off; | ||
373 | |||
374 | off = 0; | ||
375 | for (i = 0; i < d_count; i++) | ||
376 | { | ||
377 | if (off + sizeof (rec) > len) | ||
378 | return GNUNET_SYSERR; | ||
379 | GNUNET_memcpy (&rec, &src[off], sizeof (rec)); | ||
380 | dd[i].issuer_attribute_len = ntohl ((uint32_t) rec.issuer_attribute_len); | ||
381 | dd[i].issuer_key = rec.issuer_key; | ||
382 | dd[i].subject_key = rec.subject_key; | ||
383 | off += sizeof (rec); | ||
384 | if (off + dd[i].issuer_attribute_len > len) | ||
385 | return GNUNET_SYSERR; | ||
386 | dd[i].issuer_attribute = &src[off]; | ||
387 | off += dd[i].issuer_attribute_len; | ||
388 | dd[i].subject_attribute_len = ntohl ((uint32_t) rec.subject_attribute_len); | ||
389 | if (off + dd[i].subject_attribute_len > len) | ||
390 | return GNUNET_SYSERR; | ||
391 | dd[i].subject_attribute = &src[off]; | ||
392 | off += dd[i].subject_attribute_len; | ||
393 | } | ||
394 | return GNUNET_ABD_delegates_deserialize (len - off, | ||
395 | &src[off], | ||
396 | c_count, | ||
397 | cd); | ||
398 | } | ||
399 | |||
400 | |||
401 | int | ||
402 | GNUNET_ABD_delegate_serialize (struct GNUNET_ABD_Delegate *dele, | ||
403 | char **data) | ||
404 | { | ||
405 | size_t size; | ||
406 | struct DelegateEntry *cdata; | ||
407 | int attr_len; | ||
408 | |||
409 | // +1 for \0 | ||
410 | if (0 == dele->subject_attribute_len) | ||
411 | { | ||
412 | attr_len = dele->issuer_attribute_len + 1; | ||
413 | } | ||
414 | else | ||
415 | { | ||
416 | attr_len = dele->issuer_attribute_len + dele->subject_attribute_len + 2; | ||
417 | } | ||
418 | size = sizeof (struct DelegateEntry) + attr_len; | ||
419 | |||
420 | char tmp_str[attr_len]; | ||
421 | GNUNET_memcpy (tmp_str, dele->issuer_attribute, dele->issuer_attribute_len); | ||
422 | if (0 != dele->subject_attribute_len) | ||
423 | { | ||
424 | tmp_str[dele->issuer_attribute_len] = '\0'; | ||
425 | GNUNET_memcpy (tmp_str + dele->issuer_attribute_len + 1, | ||
426 | dele->subject_attribute, | ||
427 | dele->subject_attribute_len); | ||
428 | } | ||
429 | tmp_str[attr_len - 1] = '\0'; | ||
430 | |||
431 | *data = GNUNET_malloc (size); | ||
432 | cdata = (struct DelegateEntry *) *data; | ||
433 | cdata->subject_key = dele->subject_key; | ||
434 | cdata->issuer_key = dele->issuer_key; | ||
435 | cdata->expiration = GNUNET_htonll (dele->expiration.abs_value_us); | ||
436 | cdata->signature = dele->signature; | ||
437 | cdata->issuer_attribute_len = htonl (dele->issuer_attribute_len + 1); | ||
438 | if (0 == dele->subject_attribute_len) | ||
439 | { | ||
440 | cdata->subject_attribute_len = htonl (0); | ||
441 | } | ||
442 | else | ||
443 | { | ||
444 | cdata->subject_attribute_len = htonl (dele->subject_attribute_len + 1); | ||
445 | } | ||
446 | cdata->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_DELEGATE); | ||
447 | cdata->purpose.size = | ||
448 | htonl (size - sizeof (struct GNUNET_CRYPTO_EcdsaSignature)); | ||
449 | |||
450 | GNUNET_memcpy (&cdata[1], tmp_str, attr_len); | ||
451 | |||
452 | if (GNUNET_OK != | ||
453 | GNUNET_CRYPTO_ecdsa_verify (GNUNET_SIGNATURE_PURPOSE_DELEGATE, | ||
454 | cdata, | ||
455 | &cdata->signature, | ||
456 | &cdata->issuer_key)) | ||
457 | { | ||
458 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Serialize: Invalid delegate\n"); | ||
459 | return 0; | ||
460 | } | ||
461 | return size; | ||
462 | } | ||
463 | |||
464 | |||
465 | struct GNUNET_ABD_Delegate * | ||
466 | GNUNET_ABD_delegate_deserialize (const char *data, size_t data_size) | ||
467 | { | ||
468 | struct GNUNET_ABD_Delegate *dele; | ||
469 | struct DelegateEntry *cdata; | ||
470 | char *attr_combo_str; | ||
471 | |||
472 | if (data_size < sizeof (struct DelegateEntry)) | ||
473 | return NULL; | ||
474 | cdata = (struct DelegateEntry *) data; | ||
475 | if (GNUNET_OK != | ||
476 | GNUNET_CRYPTO_ecdsa_verify (GNUNET_SIGNATURE_PURPOSE_DELEGATE, | ||
477 | cdata, | ||
478 | &cdata->signature, | ||
479 | &cdata->issuer_key)) | ||
480 | { | ||
481 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Deserialize: Invalid delegate\n"); | ||
482 | return NULL; | ||
483 | } | ||
484 | attr_combo_str = (char *) &cdata[1]; | ||
485 | int iss_len = ntohl (cdata->issuer_attribute_len); | ||
486 | int sub_len = ntohl (cdata->subject_attribute_len); | ||
487 | int attr_combo_len = iss_len + sub_len; | ||
488 | |||
489 | dele = | ||
490 | GNUNET_malloc (sizeof (struct GNUNET_ABD_Delegate) + attr_combo_len); | ||
491 | |||
492 | dele->issuer_key = cdata->issuer_key; | ||
493 | dele->subject_key = cdata->subject_key; | ||
494 | GNUNET_memcpy (&dele[1], attr_combo_str, attr_combo_len); | ||
495 | dele->signature = cdata->signature; | ||
496 | |||
497 | // Set the pointers for the attributes | ||
498 | dele->issuer_attribute = (char *) &dele[1]; | ||
499 | dele->issuer_attribute_len = iss_len; | ||
500 | dele->subject_attribute_len = sub_len; | ||
501 | if (0 == sub_len) | ||
502 | { | ||
503 | dele->subject_attribute = NULL; | ||
504 | } | ||
505 | else | ||
506 | { | ||
507 | dele->subject_attribute = (char *) &dele[1] + iss_len; | ||
508 | } | ||
509 | |||
510 | dele->expiration.abs_value_us = GNUNET_ntohll (cdata->expiration); | ||
511 | |||
512 | return dele; | ||
513 | } | ||
514 | |||
515 | |||
516 | /* end of abd_serialization.c */ | ||