#include "platform.h"
#include <math.h>
#include "gnunet_util_lib.h"
+#include "gnunet_block_lib.h"
#include "gnunet_constants.h"
#include "gnunet_protocols.h"
#include "gnunet_signatures.h"
* @param client the new client
* @param app_cls must alias @a client
*/
-static void
+static void
client_disconnect_cb (void *cls,
struct GNUNET_SERVICE_Client *client,
void *app_cls)
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
/* add to set for future connections */
e.size = htons (rm->header.size);
- e.element_type = 0;
+ e.element_type = GNUNET_BLOCK_TYPE_REVOCATION;
e.data = rm;
if (GNUNET_OK !=
GNUNET_SET_add_element (revocation_set,
GNUNET_break_op (0);
return;
}
- if (0 != element->element_type)
+ if (GNUNET_BLOCK_TYPE_REVOCATION != element->element_type)
{
GNUNET_STATISTICS_update (stats,
gettext_noop ("# unsupported revocations received via set union"),
- 1, GNUNET_NO);
+ 1,
+ GNUNET_NO);
return;
}
rm = element->data;
void *internal_cls)
{
struct PeerEntry *peer_entry = internal_cls;
-
+
if (0 == memcmp (peer,
&my_identity,
sizeof (my_identity)))
return;
- GNUNET_assert (NULL != peer_entry);
+ GNUNET_assert (NULL != peer_entry);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Peer `%s' disconnected from us\n",
GNUNET_i2s (peer));
static void
run (void *cls,
const struct GNUNET_CONFIGURATION_Handle *c,
- struct GNUNET_SERVICE_Handle *service)
+ struct GNUNET_SERVICE_Handle *service)
{
struct GNUNET_MQ_MessageHandler core_handlers[] = {
GNUNET_MQ_hd_fixed_size (p2p_revoke,
--- /dev/null
+/*
+ This file is part of GNUnet
+ Copyright (C) 2017 GNUnet e.V.
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+/**
+ * @file block/plugin_block_revocation.c
+ * @brief revocation for a block plugin
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include "gnunet_signatures.h"
+#include "gnunet_block_plugin.h"
+#include "gnunet_block_group_lib.h"
+#include "revocation.h"
+#include "gnunet_revocation_service.h"
+
+#define DEBUG_REVOCATION GNUNET_EXTRA_LOGGING
+
+/**
+ * Number of bits we set per entry in the bloomfilter.
+ * Do not change!
+ */
+#define BLOOMFILTER_K 16
+
+
+/**
+ * How big is the BF we use for DHT blocks?
+ */
+#define REVOCATION_BF_SIZE 8
+
+
+/**
+ * Context used inside the plugin.
+ */
+struct InternalContext
+{
+
+ unsigned int matching_bits;
+
+};
+
+
+/**
+ * Create a new block group.
+ *
+ * @param ctx block context in which the block group is created
+ * @param type type of the block for which we are creating the group
+ * @param nonce random value used to seed the group creation
+ * @param raw_data optional serialized prior state of the group, NULL if unavailable/fresh
+ * @param raw_data_size number of bytes in @a raw_data, 0 if unavailable/fresh
+ * @param va variable arguments specific to @a type
+ * @return block group handle, NULL if block groups are not supported
+ * by this @a type of block (this is not an error)
+ */
+static struct GNUNET_BLOCK_Group *
+block_plugin_revocation_create_group (void *cls,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t nonce,
+ const void *raw_data,
+ size_t raw_data_size,
+ va_list va)
+{
+ unsigned int bf_size;
+ const char *guard;
+
+ guard = va_arg (va, const char *);
+ if (0 == strcmp (guard,
+ "seen-set-size"))
+ bf_size = GNUNET_BLOCK_GROUP_compute_bloomfilter_size (va_arg (va, unsigned int),
+ BLOOMFILTER_K);
+ else if (0 == strcmp (guard,
+ "filter-size"))
+ bf_size = va_arg (va, unsigned int);
+ else
+ {
+ GNUNET_break (0);
+ bf_size = REVOCATION_BF_SIZE;
+ }
+ GNUNET_break (NULL == va_arg (va, const char *));
+ return GNUNET_BLOCK_GROUP_bf_create (cls,
+ bf_size,
+ BLOOMFILTER_K,
+ type,
+ nonce,
+ raw_data,
+ raw_data_size);
+}
+
+
+/**
+ * Function called to validate a reply or a request. For
+ * request evaluation, simply pass "NULL" for the reply_block.
+ *
+ * @param cls our `struct InternalContext`
+ * @param ctx context
+ * @param type block type
+ * @param group block group to use
+ * @param eo control flags
+ * @param query original query (hash)
+ * @param xquery extrended query data (can be NULL, depending on type)
+ * @param xquery_size number of bytes in xquery
+ * @param reply_block response to validate
+ * @param reply_block_size number of bytes in reply block
+ * @return characterization of result
+ */
+static enum GNUNET_BLOCK_EvaluationResult
+block_plugin_revocation_evaluate (void *cls,
+ struct GNUNET_BLOCK_Context *ctx,
+ enum GNUNET_BLOCK_Type type,
+ struct GNUNET_BLOCK_Group *group,
+ enum GNUNET_BLOCK_EvaluationOptions eo,
+ const struct GNUNET_HashCode *query,
+ const void *xquery,
+ size_t xquery_size,
+ const void *reply_block,
+ size_t reply_block_size)
+{
+ struct InternalContext *ic = cls;
+ struct GNUNET_HashCode chash;
+ const struct RevokeMessage *rm = reply_block;
+
+ if (NULL == reply_block)
+ return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
+ if (reply_block_size != sizeof (*rm))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
+ }
+ if (GNUNET_YES !=
+ GNUNET_REVOCATION_check_pow (&rm->public_key,
+ rm->proof_of_work,
+ ic->matching_bits))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_ecdsa_verify (GNUNET_SIGNATURE_PURPOSE_REVOCATION,
+ &rm->purpose,
+ &rm->signature,
+ &rm->public_key))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
+ }
+ GNUNET_CRYPTO_hash (&rm->public_key,
+ sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey),
+ &chash);
+ if (GNUNET_YES ==
+ GNUNET_BLOCK_GROUP_bf_test_and_set (group,
+ &chash))
+ return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
+ return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
+}
+
+
+/**
+ * Function called to obtain the key for a block.
+ *
+ * @param cls closure
+ * @param type block type
+ * @param block block to get the key for
+ * @param block_size number of bytes in block
+ * @param key set to the key (query) for the given block
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if type not supported
+ * (or if extracting a key from a block of this type does not work)
+ */
+static int
+block_plugin_revocation_get_key (void *cls,
+ enum GNUNET_BLOCK_Type type,
+ const void *block,
+ size_t block_size,
+ struct GNUNET_HashCode *key)
+{
+ const struct RevokeMessage *rm = block;
+
+ if (block_size != sizeof (*rm))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_CRYPTO_hash (&rm->public_key,
+ sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey),
+ key);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls the configuration to use
+ */
+void *
+libgnunet_plugin_block_revocation_init (void *cls)
+{
+ static enum GNUNET_BLOCK_Type types[] =
+ {
+ GNUNET_BLOCK_TYPE_REVOCATION,
+ GNUNET_BLOCK_TYPE_ANY /* end of list */
+ };
+ const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
+ struct GNUNET_BLOCK_PluginFunctions *api;
+ struct InternalContext *ic;
+ unsigned long long matching_bits;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg,
+ "REVOCATION",
+ "WORKBITS",
+ &matching_bits))
+ return NULL;
+
+ api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
+ api->evaluate = &block_plugin_revocation_evaluate;
+ api->get_key = &block_plugin_revocation_get_key;
+ api->create_group = &block_plugin_revocation_create_group;
+ api->types = types;
+ ic = GNUNET_new (struct InternalContext);
+ ic->matching_bits = (unsigned int) matching_bits;
+ api->cls = ic;
+ return api;
+}
+
+
+/**
+ * Exit point from the plugin.
+ */
+void *
+libgnunet_plugin_block_revocation_done (void *cls)
+{
+ struct GNUNET_BLOCK_PluginFunctions *api = cls;
+ struct InternalContext *ic = api->cls;
+
+ GNUNET_free (ic);
+ GNUNET_free (api);
+ return NULL;
+}
+
+/* end of plugin_block_revocation.c */
projects / oweals / gnunet.git / commitdiff