GNUnet  0.11.x
Data Structures | Functions | Variables
gnunet-service-revocation.c File Reference

key revocation service More...

#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"
#include "gnunet_statistics_service.h"
#include "gnunet_core_service.h"
#include "gnunet_revocation_service.h"
#include "gnunet_setu_service.h"
#include "revocation.h"
#include <gcrypt.h>
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Data Structures

struct  PeerEntry
 Per-peer information. More...
 

Functions

static struct PeerEntrynew_peer_entry (const struct GNUNET_PeerIdentity *peer)
 Create a new PeerEntry and add it to the peers multipeermap. More...
 
static int verify_revoke_message (const struct RevokeMessage *rm)
 An revoke message has been received, check that it is well-formed. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 Handle client connecting to the service. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_cls)
 Handle client connecting to the service. More...
 
static void handle_query_message (void *cls, const struct QueryMessage *qm)
 Handle QUERY message from client. More...
 
static int do_flood (void *cls, const struct GNUNET_PeerIdentity *target, void *value)
 Flood the given revocation message to all neighbours. More...
 
static int publicize_rm (const struct RevokeMessage *rm)
 Publicize revocation message. More...
 
static void handle_revoke_message (void *cls, const struct RevokeMessage *rm)
 Handle REVOKE message from client. More...
 
static void handle_p2p_revoke (void *cls, const struct RevokeMessage *rm)
 Core handler for flooded revocation messages. More...
 
static void add_revocation (void *cls, const struct GNUNET_SETU_Element *element, uint64_t current_size, enum GNUNET_SETU_Status status)
 Callback for set operation results. More...
 
static void transmit_task_cb (void *cls)
 The timeout for performing the set union has expired, run the set operation on the revocation certificates. More...
 
static void * handle_core_connect (void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
 Method called whenever a peer connects. More...
 
static void handle_core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
 Method called whenever a peer disconnects. More...
 
static int free_entry (void *cls, const struct GNUNET_HashCode *key, void *value)
 Free all values in a hash map. More...
 
static void shutdown_task (void *cls)
 Task run during shutdown. More...
 
static void core_init (void *cls, const struct GNUNET_PeerIdentity *identity)
 Called on core init/fail. More...
 
static void handle_revocation_union_request (void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SETU_Request *request)
 Called when another peer wants to do a set operation with the local peer. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
 Handle network size estimate clients. More...
 
 GNUNET_SERVICE_MAIN ("revocation", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_fixed_size(query_message, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, struct QueryMessage, NULL), GNUNET_MQ_hd_fixed_size(revoke_message, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, struct RevokeMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static struct GNUNET_SETU_Handlerevocation_set
 Set from all revocations known to us. More...
 
static struct GNUNET_CONTAINER_MultiHashMaprevocation_map
 Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessage. More...
 
static const struct GNUNET_CONFIGURATION_Handlecfg
 Handle to our current configuration. More...
 
static struct GNUNET_STATISTICS_Handlestats
 Handle to the statistics service. More...
 
static struct GNUNET_CORE_Handlecore_api
 Handle to the core service (for flooding) More...
 
static struct GNUNET_CONTAINER_MultiPeerMappeers
 Map of all connected peers. More...
 
static struct GNUNET_PeerIdentity my_identity
 The peer identity of this peer. More...
 
static struct GNUNET_DISK_FileHandlerevocation_db
 File handle for the revocation database. More...
 
static struct GNUNET_SETU_ListenHandlerevocation_union_listen_handle
 Handle for us listening to incoming revocation set union requests. More...
 
static unsigned long long revocation_work_required
 Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits. More...
 
static struct GNUNET_TIME_Relative epoch_duration
 Length of an expiration expoch. More...
 
static struct GNUNET_HashCode revocation_set_union_app_id
 Our application ID for set union operations. More...
 

Detailed Description

key revocation service

Author
Christian Grothoff

The purpose of this service is to allow users to permanently revoke (compromised) keys. This is done by flooding the network with the revocation requests. To reduce the attack potential offered by such flooding, revocations must include a proof of work. We use the set service for efficiently computing the union of revocations of peers that connect.

TODO:

Definition in file gnunet-service-revocation.c.

Function Documentation

◆ new_peer_entry()

static struct PeerEntry* new_peer_entry ( const struct GNUNET_PeerIdentity peer)
static

Create a new PeerEntry and add it to the peers multipeermap.

Parameters
peerthe peer identity
Returns
a pointer to the new PeerEntry

Definition at line 150 of file gnunet-service-revocation.c.

References GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_put(), GNUNET_new, GNUNET_OK, PeerEntry::id, and peer.

Referenced by handle_core_connect(), and handle_revocation_union_request().

151 {
152  struct PeerEntry *peer_entry;
153 
154  peer_entry = GNUNET_new (struct PeerEntry);
155  peer_entry->id = *peer;
158  &peer_entry->id,
159  peer_entry,
161  return peer_entry;
162 }
Per-peer information.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
struct GNUNET_PeerIdentity id
What is the identity of the peer?
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◆ verify_revoke_message()

static int verify_revoke_message ( const struct RevokeMessage rm)
static

An revoke message has been received, check that it is well-formed.

Parameters
rmthe message to verify
Returns
GNUNET_YES if the message is verified GNUNET_NO if the key/signature don't verify

Definition at line 173 of file gnunet-service-revocation.c.

References epoch_duration, GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_REVOCATION_check_pow(), GNUNET_YES, RevokeMessage::proof_of_work, and revocation_work_required.

Referenced by publicize_rm().

174 {
176  (unsigned
179  {
181  "Proof of work invalid!\n");
182  GNUNET_break_op (0);
183  return GNUNET_NO;
184  }
185  return GNUNET_YES;
186 }
struct GNUNET_REVOCATION_PowP proof_of_work
Number that causes a hash collision with the public_key.
Definition: revocation.h:95
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
static unsigned long long revocation_work_required
Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits.
static struct GNUNET_TIME_Relative epoch_duration
Length of an expiration expoch.
#define GNUNET_log(kind,...)
enum GNUNET_GenericReturnValue GNUNET_REVOCATION_check_pow(const struct GNUNET_REVOCATION_PowP *pow, unsigned int matching_bits, struct GNUNET_TIME_Relative epoch_duration)
Check if the given proof-of-work is valid.
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◆ client_connect_cb()

static void* client_connect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
struct GNUNET_MQ_Handle mq 
)
static

Handle client connecting to the service.

Parameters
clsNULL
clientthe new client
mqthe message queue of client
Returns
client

Definition at line 198 of file gnunet-service-revocation.c.

Referenced by run().

201 {
202  return client;
203 }
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◆ client_disconnect_cb()

static void client_disconnect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  app_cls 
)
static

Handle client connecting to the service.

Parameters
clsNULL
clientthe new client
app_clsmust alias client

Definition at line 214 of file gnunet-service-revocation.c.

References GNUNET_assert.

Referenced by run().

217 {
218  GNUNET_assert (client == app_cls);
219 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
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◆ handle_query_message()

static void handle_query_message ( void *  cls,
const struct QueryMessage qm 
)
static

Handle QUERY message from client.

Parameters
clsclient who sent the message
qmthe message received

Definition at line 229 of file gnunet-service-revocation.c.

References env, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CRYPTO_hash(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_get_mq(), GNUNET_YES, QueryResponseMessage::is_valid, QueryMessage::key, and res.

231 {
232  struct GNUNET_SERVICE_Client *client = cls;
233  struct GNUNET_MQ_Envelope *env;
234  struct QueryResponseMessage *qrm;
235  struct GNUNET_HashCode hc;
236  int res;
237 
238  GNUNET_CRYPTO_hash (&qm->key,
239  sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey),
240  &hc);
242  &hc);
244  (GNUNET_NO == res)
245  ? "Received revocation check for valid key `%s' from client\n"
246  : "Received revocation check for revoked key `%s' from client\n",
247  GNUNET_h2s (&hc));
248  env = GNUNET_MQ_msg (qrm,
250  qrm->is_valid = htonl ((GNUNET_YES == res) ? GNUNET_NO : GNUNET_YES);
252  env);
254 }
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2436
static struct GNUNET_CONTAINER_MultiHashMap * revocation_map
Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessag...
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL)...
Handle to a client that is connected to a service.
Definition: service.c:250
#define GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE
Service to client: answer if key was revoked!
Key revocation response.
Definition: revocation.h:59
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:48
A 512-bit hashcode.
static int res
uint32_t is_valid
GNUNET_NO if revoked, GNUNET_YES if valid.
Definition: revocation.h:69
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GNUNET_CRYPTO_EcdsaPublicKey key
Key to check.
Definition: revocation.h:52
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
#define GNUNET_log(kind,...)
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2242
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◆ do_flood()

static int do_flood ( void *  cls,
const struct GNUNET_PeerIdentity target,
void *  value 
)
static

Flood the given revocation message to all neighbours.

Parameters
clsthe struct RevokeMessage to flood
targeta neighbour
valueour struct PeerEntry for the neighbour
Returns
GNUNET_OK (continue to iterate)

Definition at line 266 of file gnunet-service-revocation.c.

References e, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_OK, PeerEntry::mq, and value.

Referenced by publicize_rm().

269 {
270  const struct RevokeMessage *rm = cls;
271  struct PeerEntry *pe = value;
272  struct GNUNET_MQ_Envelope *e;
273  struct RevokeMessage *cp;
274 
275  if (NULL == pe->mq)
276  return GNUNET_OK; /* peer connected to us via SET,
277  but we have no direct CORE
278  connection for flooding */
279  e = GNUNET_MQ_msg (cp,
281  *cp = *rm;
283  "Flooding revocation to `%s'\n",
284  GNUNET_i2s (target));
285  GNUNET_MQ_send (pe->mq,
286  e);
287  return GNUNET_OK;
288 }
Per-peer information.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
static struct Experiment * e
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE
Client to service OR peer-to-peer: revoke this key!
Revoke key.
Definition: revocation.h:80
static char * value
Value of the record to add/remove.
struct GNUNET_MQ_Handle * mq
Queue for sending messages to this peer.
#define GNUNET_log(kind,...)
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ publicize_rm()

static int publicize_rm ( const struct RevokeMessage rm)
static

Publicize revocation message.

Stores the message locally in the database and passes it to all connected neighbours (and adds it to the set for future connections).

Parameters
rmmessage to publicize
Returns
GNUNET_OK on success, GNUNET_NO if we encountered an error, GNUNET_SYSERR if the message was malformed

Definition at line 301 of file gnunet-service-revocation.c.

References GNUNET_SETU_Element::data, do_flood(), GNUNET_SETU_Element::element_type, GNUNET_BLOCK_TYPE_REVOCATION, GNUNET_break, GNUNET_break_op, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_copy_message(), GNUNET_CRYPTO_hash(), GNUNET_DISK_file_sync(), GNUNET_DISK_file_write(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_log_strerror, GNUNET_NO, GNUNET_OK, GNUNET_SETU_add_element(), GNUNET_SYSERR, GNUNET_YES, RevokeMessage::header, GNUNET_REVOCATION_PowP::key, RevokeMessage::proof_of_work, GNUNET_SETU_Element::size, GNUNET_MessageHeader::size, and verify_revoke_message().

Referenced by handle_p2p_revoke(), and handle_revoke_message().

302 {
303  struct RevokeMessage *cp;
304  struct GNUNET_HashCode hc;
305  struct GNUNET_SETU_Element e;
306 
308  sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey),
309  &hc);
310  if (GNUNET_YES ==
312  &hc))
313  {
315  "Duplicate revocation received from peer. Ignored.\n");
316  return GNUNET_OK;
317  }
318  if (GNUNET_OK !=
320  {
321  GNUNET_break_op (0);
322  return GNUNET_SYSERR;
323  }
324  /* write to disk */
325  if (sizeof(struct RevokeMessage) !=
327  rm,
328  sizeof(struct RevokeMessage)))
329  {
331  "write");
332  return GNUNET_NO;
333  }
334  if (GNUNET_OK !=
336  {
338  "sync");
339  return GNUNET_NO;
340  }
341  /* keep copy in memory */
342  cp = (struct RevokeMessage *) GNUNET_copy_message (&rm->header);
345  &hc,
346  cp,
348  /* add to set for future connections */
349  e.size = htons (rm->header.size);
350  e.element_type = GNUNET_BLOCK_TYPE_REVOCATION;
351  e.data = rm;
352  if (GNUNET_OK !=
354  &e,
355  NULL,
356  NULL))
357  {
358  GNUNET_break (0);
359  return GNUNET_OK;
360  }
361  else
362  {
364  "Added revocation info to SET\n");
365  }
366  /* flood to neighbours */
368  &do_flood,
369  cp);
370  return GNUNET_OK;
371 }
struct GNUNET_REVOCATION_PowP proof_of_work
Number that causes a hash collision with the public_key.
Definition: revocation.h:95
int GNUNET_DISK_file_sync(const struct GNUNET_DISK_FileHandle *h)
Write file changes to disk.
Definition: disk.c:1433
static int do_flood(void *cls, const struct GNUNET_PeerIdentity *target, void *value)
Flood the given revocation message to all neighbours.
struct GNUNET_CRYPTO_EcdsaPublicKey key
The revoked public key.
static int verify_revoke_message(const struct RevokeMessage *rm)
An revoke message has been received, check that it is well-formed.
Block type for a revocation message by which a key is revoked.
static struct GNUNET_CONTAINER_MultiHashMap * revocation_map
Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessag...
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
static struct Experiment * e
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL)...
static struct GNUNET_DISK_FileHandle * revocation_db
File handle for the revocation database.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_log_strerror(level, cmd)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
Revoke key.
Definition: revocation.h:80
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:48
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:820
A 512-bit hashcode.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE.
Definition: revocation.h:85
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
#define GNUNET_log(kind,...)
int GNUNET_SETU_add_element(struct GNUNET_SETU_Handle *set, const struct GNUNET_SETU_Element *element, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Add an element to the given set.
Definition: setu_api.c:428
static struct GNUNET_SETU_Handle * revocation_set
Set from all revocations known to us.
struct GNUNET_MessageHeader * GNUNET_copy_message(const struct GNUNET_MessageHeader *msg)
Create a copy of the given message.
Element stored in a set.
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◆ handle_revoke_message()

static void handle_revoke_message ( void *  cls,
const struct RevokeMessage rm 
)
static

Handle REVOKE message from client.

Parameters
clsclient who sent the message
rmthe message received

Definition at line 381 of file gnunet-service-revocation.c.

References env, GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_client_get_mq(), GNUNET_SYSERR, GNUNET_YES, RevocationResponseMessage::is_valid, publicize_rm(), and ret.

383 {
384  struct GNUNET_SERVICE_Client *client = cls;
385  struct GNUNET_MQ_Envelope *env;
386  struct RevocationResponseMessage *rrm;
387  int ret;
388 
390  "Received REVOKE message from client\n");
391  if (GNUNET_SYSERR == (ret = publicize_rm (rm)))
392  {
393  GNUNET_break_op (0);
395  return;
396  }
397  env = GNUNET_MQ_msg (rrm,
399  rrm->is_valid = htonl ((GNUNET_OK == ret) ? GNUNET_NO : GNUNET_YES);
401  env);
403 }
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2436
static int publicize_rm(const struct RevokeMessage *rm)
Publicize revocation message.
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
Handle to a client that is connected to a service.
Definition: service.c:250
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE
Service to client: revocation confirmed.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2323
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
Key revocation response.
Definition: revocation.h:102
#define GNUNET_log(kind,...)
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
uint32_t is_valid
GNUNET_NO if revocation failed for internal reasons (e.g.
Definition: revocation.h:113
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2242
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◆ handle_p2p_revoke()

static void handle_p2p_revoke ( void *  cls,
const struct RevokeMessage rm 
)
static

Core handler for flooded revocation messages.

Parameters
clsclosure unused
rmrevocation message

Definition at line 413 of file gnunet-service-revocation.c.

References GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_SYSERR, and publicize_rm().

Referenced by add_revocation().

415 {
417  "Received REVOKE message\n");
419  publicize_rm (rm));
420 }
static int publicize_rm(const struct RevokeMessage *rm)
Publicize revocation message.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_log(kind,...)
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◆ add_revocation()

static void add_revocation ( void *  cls,
const struct GNUNET_SETU_Element element,
uint64_t  current_size,
enum GNUNET_SETU_Status  status 
)
static

Callback for set operation results.

Called for each element in the result set. Each element contains a revocation, which we should validate and then add to our revocation list (and set).

Parameters
clsclosure
elementa result element, only valid if status is #GNUNET_SETU_STATUS_OK
current_sizecurrent set size
statussee enum GNUNET_SETU_Status

Definition at line 434 of file gnunet-service-revocation.c.

References _, GNUNET_SETU_Element::data, GNUNET_SETU_Element::element_type, gettext_noop, GNUNET_BLOCK_TYPE_REVOCATION, GNUNET_break, GNUNET_break_op, GNUNET_ERROR_TYPE_WARNING, GNUNET_i2s(), GNUNET_log, GNUNET_NO, GNUNET_SETU_STATUS_ADD_LOCAL, GNUNET_SETU_STATUS_DONE, GNUNET_SETU_STATUS_FAILURE, GNUNET_STATISTICS_update(), handle_p2p_revoke(), PeerEntry::id, GNUNET_SETU_Element::size, and PeerEntry::so.

Referenced by handle_revocation_union_request().

438 {
439  struct PeerEntry *peer_entry = cls;
440  const struct RevokeMessage *rm;
441 
442  switch (status)
443  {
445  if (element->size != sizeof(struct RevokeMessage))
446  {
447  GNUNET_break_op (0);
448  return;
449  }
451  {
453  gettext_noop (
454  "# unsupported revocations received via set union"),
455  1,
456  GNUNET_NO);
457  return;
458  }
459  rm = element->data;
460  (void) handle_p2p_revoke (NULL,
461  rm);
463  gettext_noop (
464  "# revocation messages received via set union"),
465  1, GNUNET_NO);
466  break;
469  _ ("Error computing revocation set union with %s\n"),
470  GNUNET_i2s (&peer_entry->id));
471  peer_entry->so = NULL;
473  gettext_noop ("# revocation set unions failed"),
474  1,
475  GNUNET_NO);
476  break;
478  peer_entry->so = NULL;
480  gettext_noop (
481  "# revocation set unions completed"),
482  1,
483  GNUNET_NO);
484  break;
485  default:
486  GNUNET_break (0);
487  break;
488  }
489 }
static void handle_p2p_revoke(void *cls, const struct RevokeMessage *rm)
Core handler for flooded revocation messages.
Per-peer information.
const void * data
Actual data of the element.
struct GNUNET_SETU_OperationHandle * so
Handle to active set union operation (over revocation sets).
Block type for a revocation message by which a key is revoked.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define _(String)
GNU gettext support macro.
Definition: platform.h:184
The other peer refused to do the operation with us, or something went wrong.
Revoke key.
Definition: revocation.h:80
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
Success, all elements have been sent (and received).
uint16_t element_type
Application-specific element type.
Element should be added to the result set of the local peer, i.e.
uint16_t status
See PRISM_STATUS_*-constants.
#define GNUNET_log(kind,...)
struct GNUNET_PeerIdentity id
What is the identity of the peer?
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
uint16_t size
Number of bytes in the buffer pointed to by data.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ transmit_task_cb()

static void transmit_task_cb ( void *  cls)
static

The timeout for performing the set union has expired, run the set operation on the revocation certificates.

Parameters
clsNULL

Definition at line 499 of file gnunet-service-revocation.c.

References GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_SETU_prepare(), PeerEntry::id, revocation_set_union_app_id, PeerEntry::so, and PeerEntry::transmit_task.

Referenced by handle_core_connect().

500 {
501  struct PeerEntry *peer_entry = cls;
502 
504  "Starting set exchange with peer `%s'\n",
505  GNUNET_i2s (&peer_entry->id));
506  peer_entry->transmit_task = NULL;
507  GNUNET_assert (NULL == peer_entry->so);
508  peer_entry->so = GNUNET_SETU_prepare (&peer_entry->id,
510  NULL,
511  (struct GNUNET_SETU_Option[]) { { 0 } },
513  peer_entry);
514  if (GNUNET_OK !=
515  GNUNET_SETU_commit (peer_entry->so,
517  {
519  _ ("SET service crashed, terminating revocation service\n"));
521  return;
522  }
523 }
struct GNUNET_SETU_OperationHandle * GNUNET_SETU_prepare(const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_HashCode *app_id, const struct GNUNET_MessageHeader *context_msg, const struct GNUNET_SETU_Option options[], GNUNET_SETU_ResultIterator result_cb, void *result_cls)
Prepare a set operation to be evaluated with another peer.
Definition: setu_api.c:508
int GNUNET_SETU_commit(struct GNUNET_SETU_OperationHandle *oh, struct GNUNET_SETU_Handle *set)
Commit a set to be used with a set operation.
Definition: setu_api.c:837
Per-peer information.
struct GNUNET_SETU_OperationHandle * so
Handle to active set union operation (over revocation sets).
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
Option for set operations.
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
#define _(String)
GNU gettext support macro.
Definition: platform.h:184
static struct GNUNET_HashCode revocation_set_union_app_id
Our application ID for set union operations.
struct GNUNET_SCHEDULER_Task * transmit_task
Tasked used to trigger the set union operation.
static void add_revocation(void *cls, const struct GNUNET_SETU_Element *element, uint64_t current_size, enum GNUNET_SETU_Status status)
Callback for set operation results.
#define GNUNET_log(kind,...)
static struct GNUNET_SETU_Handle * revocation_set
Set from all revocations known to us.
struct GNUNET_PeerIdentity id
What is the identity of the peer?
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ handle_core_connect()

static void* handle_core_connect ( void *  cls,
const struct GNUNET_PeerIdentity peer,
struct GNUNET_MQ_Handle mq 
)
static

Method called whenever a peer connects.

Sets up the PeerEntry and schedules the initial revocation set exchange with this peer.

Parameters
clsclosure
peerpeer identity this notification is about

Definition at line 534 of file gnunet-service-revocation.c.

References GNUNET_CONTAINER_multipeermap_get(), GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_hash_cmp(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_NO, GNUNET_SCHEDULER_add_delayed(), GNUNET_STATISTICS_update(), GNUNET_TIME_UNIT_SECONDS, PeerEntry::mq, my_identity, new_peer_entry(), PeerEntry::transmit_task, and transmit_task_cb().

Referenced by run().

537 {
538  struct PeerEntry *peer_entry;
539  struct GNUNET_HashCode my_hash;
540  struct GNUNET_HashCode peer_hash;
541 
542  if (0 == GNUNET_memcmp (peer,
543  &my_identity))
544  {
545  return NULL;
546  }
547 
549  "Peer `%s' connected to us\n",
550  GNUNET_i2s (peer));
552  "# peers connected",
553  1,
554  GNUNET_NO);
556  peer);
557  if (NULL != peer_entry)
558  {
559  /* This can happen if "core"'s notification is a tad late
560  and CADET+SET were faster and already produced a
561  #handle_revocation_union_request() for us to deal
562  with. This should be rare, but isn't impossible. */
563  peer_entry->mq = mq;
564  return peer_entry;
565  }
566  peer_entry = new_peer_entry (peer);
567  peer_entry->mq = mq;
569  sizeof(my_identity),
570  &my_hash);
571  GNUNET_CRYPTO_hash (peer,
572  sizeof(*peer),
573  &peer_hash);
574  if (0 < GNUNET_CRYPTO_hash_cmp (&my_hash,
575  &peer_hash))
576  {
578  "Starting SET operation with peer `%s'\n",
579  GNUNET_i2s (peer));
580  peer_entry->transmit_task =
583  peer_entry);
584  }
585  return peer_entry;
586 }
Per-peer information.
#define GNUNET_TIME_UNIT_SECONDS
One second.
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
static void transmit_task_cb(void *cls)
The timeout for performing the set union has expired, run the set operation on the revocation certifi...
static struct GNUNET_PeerIdentity my_identity
The peer identity of this peer.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1269
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:48
A 512-bit hashcode.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
struct GNUNET_MQ_Handle * mq
Queue for sending messages to this peer.
struct GNUNET_SCHEDULER_Task * transmit_task
Tasked used to trigger the set union operation.
static struct PeerEntry * new_peer_entry(const struct GNUNET_PeerIdentity *peer)
Create a new PeerEntry and add it to the peers multipeermap.
int GNUNET_CRYPTO_hash_cmp(const struct GNUNET_HashCode *h1, const struct GNUNET_HashCode *h2)
Compare function for HashCodes, producing a total ordering of all hashcodes.
Definition: crypto_hash.c:311
void * GNUNET_CONTAINER_multipeermap_get(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Given a key find a value in the map matching the key.
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
#define GNUNET_log(kind,...)
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ handle_core_disconnect()

static void handle_core_disconnect ( void *  cls,
const struct GNUNET_PeerIdentity peer,
void *  internal_cls 
)
static

Method called whenever a peer disconnects.

Deletes the PeerEntry and cancels any pending transmission requests to that peer.

Parameters
clsclosure
peerpeer identity this notification is about
internal_clsour struct PeerEntry for this peer

Definition at line 598 of file gnunet-service-revocation.c.

References GNUNET_assert, GNUNET_CONTAINER_multipeermap_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_NO, GNUNET_SCHEDULER_cancel(), GNUNET_SETU_operation_cancel(), GNUNET_STATISTICS_update(), GNUNET_YES, my_identity, PeerEntry::so, and PeerEntry::transmit_task.

Referenced by run().

601 {
602  struct PeerEntry *peer_entry = internal_cls;
603 
604  if (0 == GNUNET_memcmp (peer,
605  &my_identity))
606  return;
607  GNUNET_assert (NULL != peer_entry);
609  "Peer `%s' disconnected from us\n",
610  GNUNET_i2s (peer));
613  peer,
614  peer_entry));
615  if (NULL != peer_entry->transmit_task)
616  {
618  peer_entry->transmit_task = NULL;
619  }
620  if (NULL != peer_entry->so)
621  {
622  GNUNET_SETU_operation_cancel (peer_entry->so);
623  peer_entry->so = NULL;
624  }
625  GNUNET_free (peer_entry);
627  "# peers connected",
628  -1,
629  GNUNET_NO);
630 }
Per-peer information.
struct GNUNET_SETU_OperationHandle * so
Handle to active set union operation (over revocation sets).
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
int GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
static struct GNUNET_PeerIdentity my_identity
The peer identity of this peer.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
struct GNUNET_SCHEDULER_Task * transmit_task
Tasked used to trigger the set union operation.
void GNUNET_SETU_operation_cancel(struct GNUNET_SETU_OperationHandle *oh)
Cancel the given set operation.
Definition: setu_api.c:319
#define GNUNET_log(kind,...)
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_free(ptr)
Wrapper around free.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
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◆ free_entry()

static int free_entry ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Free all values in a hash map.

Parameters
clsNULL
keythe key
valuevalue to free
Returns
GNUNET_OK (continue to iterate)

Definition at line 642 of file gnunet-service-revocation.c.

References GNUNET_free, and GNUNET_OK.

Referenced by shutdown_task().

645 {
646  GNUNET_free (value);
647  return GNUNET_OK;
648 }
static char * value
Value of the record to add/remove.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ shutdown_task()

static void shutdown_task ( void *  cls)
static

Task run during shutdown.

Parameters
clsunused

Definition at line 657 of file gnunet-service-revocation.c.

References free_entry(), GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multipeermap_destroy(), GNUNET_CORE_disconnect(), GNUNET_DISK_file_close(), GNUNET_NO, GNUNET_SETU_destroy(), GNUNET_SETU_listen_cancel(), and GNUNET_STATISTICS_destroy().

Referenced by run().

658 {
659  if (NULL != revocation_set)
660  {
662  revocation_set = NULL;
663  }
664  if (NULL != revocation_union_listen_handle)
665  {
668  }
669  if (NULL != core_api)
670  {
672  core_api = NULL;
673  }
674  if (NULL != stats)
675  {
677  stats = NULL;
678  }
679  if (NULL != peers)
680  {
682  peers = NULL;
683  }
684  if (NULL != revocation_db)
685  {
687  revocation_db = NULL;
688  }
690  &free_entry,
691  NULL);
693 }
static struct GNUNET_SETU_ListenHandle * revocation_union_listen_handle
Handle for us listening to incoming revocation set union requests.
int GNUNET_DISK_file_close(struct GNUNET_DISK_FileHandle *h)
Close an open file.
Definition: disk.c:1280
static struct GNUNET_CONTAINER_MultiHashMap * revocation_map
Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessag...
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
static struct GNUNET_DISK_FileHandle * revocation_db
File handle for the revocation database.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
static int free_entry(void *cls, const struct GNUNET_HashCode *key, void *value)
Free all values in a hash map.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:730
void GNUNET_SETU_destroy(struct GNUNET_SETU_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: setu_api.c:470
void GNUNET_SETU_listen_cancel(struct GNUNET_SETU_ListenHandle *lh)
Cancel the given listen operation.
Definition: setu_api.c:740
static struct GNUNET_CORE_Handle * core_api
Handle to the core service (for flooding)
static struct GNUNET_SETU_Handle * revocation_set
Set from all revocations known to us.
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
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◆ core_init()

static void core_init ( void *  cls,
const struct GNUNET_PeerIdentity identity 
)
static

Called on core init/fail.

Parameters
clsservice closure
identitythe public identity of this peer

Definition at line 703 of file gnunet-service-revocation.c.

References GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_SCHEDULER_shutdown(), identity, and my_identity.

Referenced by run().

705 {
706  if (NULL == identity)
707  {
709  "Connection to core FAILED!\n");
711  return;
712  }
714 }
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
static struct GNUNET_PeerIdentity my_identity
The peer identity of this peer.
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
#define GNUNET_log(kind,...)
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◆ handle_revocation_union_request()

static void handle_revocation_union_request ( void *  cls,
const struct GNUNET_PeerIdentity other_peer,
const struct GNUNET_MessageHeader context_msg,
struct GNUNET_SETU_Request request 
)
static

Called when another peer wants to do a set operation with the local peer.

If a listen error occurs, the 'request' is NULL.

Parameters
clsclosure
other_peerthe other peer
context_msgmessage with application specific information from the other peer
requestrequest from the other peer (never NULL), use GNUNET_SETU_accept() to accept it, otherwise the request will be refused Note that we can't just return value from the listen callback, as it is also necessary to specify the set we want to do the operation with, whith sometimes can be derived from the context message. It's necessary to specify the timeout.

Definition at line 733 of file gnunet-service-revocation.c.

References add_revocation(), GNUNET_break, GNUNET_break_op, GNUNET_CONTAINER_multipeermap_get(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_OK, GNUNET_SCHEDULER_shutdown(), GNUNET_SETU_accept(), GNUNET_SETU_commit(), new_peer_entry(), and PeerEntry::so.

Referenced by run().

737 {
738  struct PeerEntry *peer_entry;
739 
740  if (NULL == request)
741  {
742  GNUNET_break (0);
743  return;
744  }
746  "Received set exchange request from peer `%s'\n",
747  GNUNET_i2s (other_peer));
749  other_peer);
750  if (NULL == peer_entry)
751  {
752  peer_entry = new_peer_entry (other_peer);
753  }
754  if (NULL != peer_entry->so)
755  {
756  GNUNET_break_op (0);
757  return;
758  }
759  peer_entry->so = GNUNET_SETU_accept (request,
760  (struct GNUNET_SETU_Option[]) { { 0 } },
762  peer_entry);
763  if (GNUNET_OK !=
764  GNUNET_SETU_commit (peer_entry->so,
766  {
767  GNUNET_break (0);
769  return;
770  }
771 }
int GNUNET_SETU_commit(struct GNUNET_SETU_OperationHandle *oh, struct GNUNET_SETU_Handle *set)
Commit a set to be used with a set operation.
Definition: setu_api.c:837
Per-peer information.
struct GNUNET_SETU_OperationHandle * so
Handle to active set union operation (over revocation sets).
Option for set operations.
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_SETU_OperationHandle * GNUNET_SETU_accept(struct GNUNET_SETU_Request *request, const struct GNUNET_SETU_Option options[], GNUNET_SETU_ResultIterator result_cb, void *result_cls)
Accept a request we got via GNUNET_SETU_listen().
Definition: setu_api.c:774
static struct PeerEntry * new_peer_entry(const struct GNUNET_PeerIdentity *peer)
Create a new PeerEntry and add it to the peers multipeermap.
static void add_revocation(void *cls, const struct GNUNET_SETU_Element *element, uint64_t current_size, enum GNUNET_SETU_Status status)
Callback for set operation results.
void * GNUNET_CONTAINER_multipeermap_get(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Given a key find a value in the map matching the key.
#define GNUNET_log(kind,...)
static struct GNUNET_SETU_Handle * revocation_set
Set from all revocations known to us.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ run()

static void run ( void *  cls,
const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_SERVICE_Handle service 
)
static

Handle network size estimate clients.

Parameters
clsclosure
serverthe initialized server
cconfiguration to use

Definition at line 782 of file gnunet-service-revocation.c.

References _, __attribute__, client_connect_cb(), client_disconnect_cb(), core_init(), epoch_duration, fn, GNUNET_break, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONFIGURATION_get_value_time(), GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_create(), GNUNET_CORE_connect(), GNUNET_CRYPTO_hash(), GNUNET_DISK_file_open(), GNUNET_DISK_file_read(), GNUNET_DISK_file_size(), GNUNET_DISK_OPEN_CREATE, GNUNET_DISK_OPEN_READWRITE, GNUNET_DISK_PERM_GROUP_READ, GNUNET_DISK_PERM_OTHER_READ, GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log_config_invalid(), GNUNET_log_config_missing(), GNUNET_log_strerror_file, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, GNUNET_SETU_create(), GNUNET_SETU_listen(), GNUNET_STATISTICS_create(), GNUNET_YES, handle_core_connect(), handle_core_disconnect(), handle_revocation_union_request(), GNUNET_REVOCATION_PowP::key, RevokeMessage::proof_of_work, RevokeMessage::reserved, revocation_set_union_app_id, revocation_work_required, and shutdown_task().

785 {
786  struct GNUNET_MQ_MessageHandler core_handlers[] = {
787  GNUNET_MQ_hd_fixed_size (p2p_revoke,
789  struct RevokeMessage,
790  NULL),
792  };
793  char *fn;
794  uint64_t left;
795  struct RevokeMessage *rm;
796  struct GNUNET_HashCode hc;
797 
798  GNUNET_CRYPTO_hash ("revocation-set-union-application-id",
799  strlen ("revocation-set-union-application-id"),
801  if (GNUNET_OK !=
803  "REVOCATION",
804  "DATABASE",
805  &fn))
806  {
808  "REVOCATION",
809  "DATABASE");
811  return;
812  }
813  cfg = c;
815  GNUNET_NO);
816  if (GNUNET_OK !=
818  "REVOCATION",
819  "WORKBITS",
821  {
823  "REVOCATION",
824  "WORKBITS");
826  GNUNET_free (fn);
827  return;
828  }
829  if (revocation_work_required >= sizeof(struct GNUNET_HashCode) * 8)
830  {
832  "REVOCATION",
833  "WORKBITS",
834  _ ("Value is too large.\n"));
836  GNUNET_free (fn);
837  return;
838  }
839  if (GNUNET_OK !=
841  "REVOCATION",
842  "EPOCH_DURATION",
843  &epoch_duration))
844  {
846  "REVOCATION",
847  "EPOCH_DURATION");
849  GNUNET_free (fn);
850  return;
851  }
852 
858  NULL);
866  if (NULL == revocation_db)
867  {
869  "REVOCATION",
870  "DATABASE",
871  _ ("Could not open revocation database file!"));
873  GNUNET_free (fn);
874  return;
875  }
876  if (GNUNET_OK !=
878  left = 0;
879  while (left > sizeof(struct RevokeMessage))
880  {
881  rm = GNUNET_new (struct RevokeMessage);
882  if (sizeof(struct RevokeMessage) !=
884  rm,
885  sizeof(struct RevokeMessage)))
886  {
888  "read",
889  fn);
890  GNUNET_free (rm);
892  GNUNET_free (fn);
893  return;
894  }
895  GNUNET_break (0 == ntohl (rm->reserved));
897  sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey),
898  &hc);
901  &hc,
902  rm,
904  }
905  GNUNET_free (fn);
906 
908  NULL);
910  GNUNET_YES);
911  /* Connect to core service and register core handlers */
912  core_api = GNUNET_CORE_connect (cfg, /* Main configuration */
913  NULL, /* Closure passed to functions */
914  &core_init, /* Call core_init once connected */
915  &handle_core_connect, /* Handle connects */
916  &handle_core_disconnect, /* Handle disconnects */
917  core_handlers); /* Register these handlers */
918  if (NULL == core_api)
919  {
921  return;
922  }
923  stats = GNUNET_STATISTICS_create ("revocation",
924  cfg);
925 }
struct GNUNET_REVOCATION_PowP proof_of_work
Number that causes a hash collision with the public_key.
Definition: revocation.h:95
static void shutdown_task(void *cls)
Task run during shutdown.
static struct GNUNET_SETU_ListenHandle * revocation_union_listen_handle
Handle for us listening to incoming revocation set union requests.
Create file if it doesn&#39;t exist.
int GNUNET_CONFIGURATION_get_value_time(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, struct GNUNET_TIME_Relative *time)
Get a configuration value that should be a relative time.
static void * handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
int GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
struct GNUNET_CRYPTO_EcdsaPublicKey key
The revoked public key.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Handle to our current configuration.
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:732
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1331
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
static struct GNUNET_CONTAINER_MultiHashMap * revocation_map
Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessag...
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
static void core_init(void *cls, const struct GNUNET_PeerIdentity *identity)
Called on core init/fail.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_log_config_invalid(enum GNUNET_ErrorType kind, const char *section, const char *option, const char *required)
Log error message about invalid configuration option value.
static struct GNUNET_DISK_FileHandle * revocation_db
File handle for the revocation database.
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
struct GNUNET_SETU_Handle * GNUNET_SETU_create(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create an empty set, supporting the specified operation.
Definition: setu_api.c:383
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE
Client to service OR peer-to-peer: revoke this key!
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define _(String)
GNU gettext support macro.
Definition: platform.h:184
Revoke key.
Definition: revocation.h:80
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
static char * fn
Filename of the unique file.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:48
A 512-bit hashcode.
Message handler for a specific message type.
static struct GNUNET_HashCode revocation_set_union_app_id
Our application ID for set union operations.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
struct GNUNET_SETU_ListenHandle * GNUNET_SETU_listen(const struct GNUNET_CONFIGURATION_Handle *cfg, const struct GNUNET_HashCode *app_id, GNUNET_SETU_ListenCallback listen_cb, void *listen_cls)
Wait for set operation requests for the given application ID.
Definition: setu_api.c:708
struct GNUNET_CORE_Handle * GNUNET_CORE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls, GNUNET_CORE_StartupCallback init, GNUNET_CORE_ConnectEventHandler connects, GNUNET_CORE_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Connect to the core service.
Definition: core_api.c:692
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
int GNUNET_DISK_file_size(const char *filename, uint64_t *size, int include_symbolic_links, int single_file_mode)
Get the size of the file (or directory) of the given file (in bytes).
Definition: disk.c:257
Everybody can read.
static unsigned long long revocation_work_required
Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits.
static struct GNUNET_TIME_Relative epoch_duration
Length of an expiration expoch.
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
Open the file for both reading and writing.
static void handle_revocation_union_request(void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SETU_Request *request)
Called when another peer wants to do a set operation with the local peer.
static void handle_core_disconnect(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a peer disconnects.
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
static struct GNUNET_CORE_Handle * core_api
Handle to the core service (for flooding)
static struct GNUNET_SETU_Handle * revocation_set
Set from all revocations known to us.
struct GNUNET_DISK_FileHandle * GNUNET_DISK_file_open(const char *fn, enum GNUNET_DISK_OpenFlags flags, enum GNUNET_DISK_AccessPermissions perm)
Open a file.
Definition: disk.c:1203
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_free(ptr)
Wrapper around free.
uint32_t reserved
For alignment.
Definition: revocation.h:90
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◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "revocation"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_fixed_size(query_message, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, struct QueryMessage, NULL)  ,
GNUNET_MQ_hd_fixed_size(revoke_message, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, struct RevokeMessage, NULL)  ,
GNUNET_MQ_handler_end()   
)

Define "main" method using service macro.

Referenced by run().

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Variable Documentation

◆ revocation_set

struct GNUNET_SETU_Handle* revocation_set
static

Set from all revocations known to us.

Definition at line 83 of file gnunet-service-revocation.c.

◆ revocation_map

struct GNUNET_CONTAINER_MultiHashMap* revocation_map
static

Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessage.

Definition at line 89 of file gnunet-service-revocation.c.

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

Handle to our current configuration.

Definition at line 94 of file gnunet-service-revocation.c.

◆ stats

struct GNUNET_STATISTICS_Handle* stats
static

Handle to the statistics service.

Definition at line 99 of file gnunet-service-revocation.c.

◆ core_api

struct GNUNET_CORE_Handle* core_api
static

Handle to the core service (for flooding)

Definition at line 104 of file gnunet-service-revocation.c.

◆ peers

struct GNUNET_CONTAINER_MultiPeerMap* peers
static

Map of all connected peers.

Definition at line 109 of file gnunet-service-revocation.c.

◆ my_identity

struct GNUNET_PeerIdentity my_identity
static

The peer identity of this peer.

Definition at line 114 of file gnunet-service-revocation.c.

Referenced by core_init(), handle_core_connect(), and handle_core_disconnect().

◆ revocation_db

struct GNUNET_DISK_FileHandle* revocation_db
static

File handle for the revocation database.

Definition at line 119 of file gnunet-service-revocation.c.

◆ revocation_union_listen_handle

struct GNUNET_SETU_ListenHandle* revocation_union_listen_handle
static

Handle for us listening to incoming revocation set union requests.

Definition at line 124 of file gnunet-service-revocation.c.

◆ revocation_work_required

unsigned long long revocation_work_required
static

Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits.

Definition at line 129 of file gnunet-service-revocation.c.

Referenced by run(), and verify_revoke_message().

◆ epoch_duration

struct GNUNET_TIME_Relative epoch_duration
static

Length of an expiration expoch.

Definition at line 134 of file gnunet-service-revocation.c.

Referenced by run(), and verify_revoke_message().

◆ revocation_set_union_app_id

struct GNUNET_HashCode revocation_set_union_app_id
static

Our application ID for set union operations.

Must be the same for all (compatible) peers.

Definition at line 140 of file gnunet-service-revocation.c.

Referenced by run(), and transmit_task_cb().