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-rw-r--r--src/revocation/plugin_block_revocation.c275
1 files changed, 0 insertions, 275 deletions
diff --git a/src/revocation/plugin_block_revocation.c b/src/revocation/plugin_block_revocation.c
deleted file mode 100644
index da5882d59..000000000
--- a/src/revocation/plugin_block_revocation.c
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@@ -1,275 +0,0 @@
1/*
2 This file is part of GNUnet
3 Copyright (C) 2017 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 block/plugin_block_revocation.c
23 * @brief revocation for a block plugin
24 * @author Christian Grothoff
25 */
26
27#include "platform.h"
28#include "gnunet_signatures.h"
29#include "gnunet_block_plugin.h"
30#include "gnunet_block_group_lib.h"
31#include "revocation.h"
32#include "gnunet_revocation_service.h"
33
34#define DEBUG_REVOCATION GNUNET_EXTRA_LOGGING
35
36/**
37 * Number of bits we set per entry in the bloomfilter.
38 * Do not change!
39 */
40#define BLOOMFILTER_K 16
41
42
43/**
44 * How big is the BF we use for DHT blocks?
45 */
46#define REVOCATION_BF_SIZE 8
47
48
49/**
50 * Context used inside the plugin.
51 */
52struct InternalContext
53{
54 unsigned int matching_bits;
55 struct GNUNET_TIME_Relative epoch_duration;
56};
57
58
59/**
60 * Create a new block group.
61 *
62 * @param ctx block context in which the block group is created
63 * @param type type of the block for which we are creating the group
64 * @param nonce random value used to seed the group creation
65 * @param raw_data optional serialized prior state of the group, NULL if unavailable/fresh
66 * @param raw_data_size number of bytes in @a raw_data, 0 if unavailable/fresh
67 * @param va variable arguments specific to @a type
68 * @return block group handle, NULL if block groups are not supported
69 * by this @a type of block (this is not an error)
70 */
71static struct GNUNET_BLOCK_Group *
72block_plugin_revocation_create_group (void *cls,
73 enum GNUNET_BLOCK_Type type,
74 uint32_t nonce,
75 const void *raw_data,
76 size_t raw_data_size,
77 va_list va)
78{
79 unsigned int bf_size;
80 const char *guard;
81
82 guard = va_arg (va, const char *);
83 if (0 == strcmp (guard,
84 "seen-set-size"))
85 bf_size = GNUNET_BLOCK_GROUP_compute_bloomfilter_size (va_arg (va, unsigned
86 int),
87 BLOOMFILTER_K);
88 else if (0 == strcmp (guard,
89 "filter-size"))
90 bf_size = va_arg (va, unsigned int);
91 else
92 {
93 GNUNET_break (0);
94 bf_size = REVOCATION_BF_SIZE;
95 }
96 GNUNET_break (NULL == va_arg (va, const char *));
97 return GNUNET_BLOCK_GROUP_bf_create (cls,
98 bf_size,
99 BLOOMFILTER_K,
100 type,
101 nonce,
102 raw_data,
103 raw_data_size);
104}
105
106
107/**
108 * Function called to validate a reply or a request. For
109 * request evaluation, simply pass "NULL" for the reply_block.
110 *
111 * @param cls our `struct InternalContext`
112 * @param ctx context
113 * @param type block type
114 * @param group block group to use
115 * @param eo control flags
116 * @param query original query (hash)
117 * @param xquery extrended query data (can be NULL, depending on type)
118 * @param xquery_size number of bytes in xquery
119 * @param reply_block response to validate
120 * @param reply_block_size number of bytes in reply block
121 * @return characterization of result
122 */
123static enum GNUNET_BLOCK_EvaluationResult
124block_plugin_revocation_evaluate (void *cls,
125 struct GNUNET_BLOCK_Context *ctx,
126 enum GNUNET_BLOCK_Type type,
127 struct GNUNET_BLOCK_Group *group,
128 enum GNUNET_BLOCK_EvaluationOptions eo,
129 const struct GNUNET_HashCode *query,
130 const void *xquery,
131 size_t xquery_size,
132 const void *reply_block,
133 size_t reply_block_size)
134{
135 struct InternalContext *ic = cls;
136 struct GNUNET_HashCode chash;
137 ssize_t pklen;
138 const struct RevokeMessage *rm = reply_block;
139
140 if (NULL == reply_block)
141 return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
142 if (reply_block_size != sizeof(*rm))
143 {
144 GNUNET_break_op (0);
145 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
146 }
147 struct GNUNET_REVOCATION_PowP *pow = (struct GNUNET_REVOCATION_PowP *) &rm[1];
148 const struct GNUNET_IDENTITY_PublicKey *pk;
149 pk = (const struct GNUNET_IDENTITY_PublicKey *) &pow[1];
150 if (GNUNET_YES != GNUNET_REVOCATION_check_pow (pow,
151 ic->matching_bits,
152 ic->epoch_duration))
153 {
154 GNUNET_break_op (0);
155 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
156 }
157 pklen = GNUNET_IDENTITY_key_get_length (pk);
158 if (0 > pklen)
159 {
160 GNUNET_break_op (0);
161 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
162 }
163 GNUNET_CRYPTO_hash (pk,
164 pklen,
165 &chash);
166 if (GNUNET_YES ==
167 GNUNET_BLOCK_GROUP_bf_test_and_set (group,
168 &chash))
169 return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
170 return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
171}
172
173
174/**
175 * Function called to obtain the key for a block.
176 *
177 * @param cls closure
178 * @param type block type
179 * @param block block to get the key for
180 * @param block_size number of bytes in block
181 * @param key set to the key (query) for the given block
182 * @return #GNUNET_OK on success, #GNUNET_SYSERR if type not supported
183 * (or if extracting a key from a block of this type does not work)
184 */
185static int
186block_plugin_revocation_get_key (void *cls,
187 enum GNUNET_BLOCK_Type type,
188 const void *block,
189 size_t block_size,
190 struct GNUNET_HashCode *key)
191{
192 const struct RevokeMessage *rm = block;
193 ssize_t ksize;
194
195 if (block_size <= sizeof(*rm))
196 {
197 GNUNET_break_op (0);
198 return GNUNET_SYSERR;
199 }
200 struct GNUNET_REVOCATION_PowP *pow = (struct GNUNET_REVOCATION_PowP *) &rm[1];
201 const struct GNUNET_IDENTITY_PublicKey *pk;
202 pk = (const struct GNUNET_IDENTITY_PublicKey *) &pow[1];
203 ksize = GNUNET_IDENTITY_key_get_length (pk);
204 if (0 > ksize)
205 {
206 GNUNET_break_op (0);
207 return GNUNET_SYSERR;
208 }
209 GNUNET_CRYPTO_hash (pk,
210 ksize,
211 key);
212 return GNUNET_OK;
213}
214
215
216/**
217 * Entry point for the plugin.
218 *
219 * @param cls the configuration to use
220 */
221void *
222libgnunet_plugin_block_revocation_init (void *cls)
223{
224 static enum GNUNET_BLOCK_Type types[] = {
225 GNUNET_BLOCK_TYPE_REVOCATION,
226 GNUNET_BLOCK_TYPE_ANY /* end of list */
227 };
228 const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
229 struct GNUNET_BLOCK_PluginFunctions *api;
230 struct InternalContext *ic;
231 unsigned long long matching_bits;
232 struct GNUNET_TIME_Relative epoch_duration;
233
234 if (GNUNET_OK !=
235 GNUNET_CONFIGURATION_get_value_number (cfg,
236 "REVOCATION",
237 "WORKBITS",
238 &matching_bits))
239 return NULL;
240 if (GNUNET_OK !=
241 GNUNET_CONFIGURATION_get_value_time (cfg,
242 "REVOCATION",
243 "EPOCH_DURATION",
244 &epoch_duration))
245 return NULL;
246
247 api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
248 api->evaluate = &block_plugin_revocation_evaluate;
249 api->get_key = &block_plugin_revocation_get_key;
250 api->create_group = &block_plugin_revocation_create_group;
251 api->types = types;
252 ic = GNUNET_new (struct InternalContext);
253 ic->matching_bits = (unsigned int) matching_bits;
254 ic->epoch_duration = epoch_duration;
255 api->cls = ic;
256 return api;
257}
258
259
260/**
261 * Exit point from the plugin.
262 */
263void *
264libgnunet_plugin_block_revocation_done (void *cls)
265{
266 struct GNUNET_BLOCK_PluginFunctions *api = cls;
267 struct InternalContext *ic = api->cls;
268
269 GNUNET_free (ic);
270 GNUNET_free (api);
271 return NULL;
272}
273
274
275/* end of plugin_block_revocation.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-26 02:46:30 +0000