#include "gnunet_common.h"
#include "gnunet_util_lib.h"
#include "gnunet_messenger_service.h"
#include "gnunet_namestore_service.h"
#include "messenger_api_contact_store.h"

Include dependency graph for messenger_api_handle.h:

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Data Structures
struct	GNUNET_MESSENGER_Handle

Functions
struct GNUNET_MESSENGER_Handle *	create_handle (const struct GNUNET_CONFIGURATION_Handle cfg, GNUNET_MESSENGER_MessageCallback msg_callback, void msg_cls)
	Creates and allocates a new handle using a given configuration and a custom message callback with a given closure for the client API. More...

void	destroy_handle (struct GNUNET_MESSENGER_Handle *handle)
	Destroys a handle and frees its memory fully from the client API. More...

void	set_handle_name (struct GNUNET_MESSENGER_Handle handle, const char name)
	Sets the name of a handle to a specific name. More...

const char *	get_handle_name (const struct GNUNET_MESSENGER_Handle *handle)
	Returns the current name of a given handle or NULL if no valid name was assigned yet. More...

void	set_handle_key (struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_CRYPTO_PrivateKey key)
	Sets the keypair of a given handle to the keypair of a specific private key. More...

const struct GNUNET_CRYPTO_PrivateKey *	get_handle_key (const struct GNUNET_MESSENGER_Handle *handle)
	Returns the private key of a given handle. More...

const struct GNUNET_CRYPTO_PublicKey *	get_handle_pubkey (const struct GNUNET_MESSENGER_Handle *handle)
	Returns the public key of a given handle. More...

struct GNUNET_MESSENGER_ContactStore *	get_handle_contact_store (struct GNUNET_MESSENGER_Handle *handle)
	Returns the used contact store of a given handle. More...

struct GNUNET_MESSENGER_Contact *	get_handle_contact (struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_HashCode key)
	Returns the contact of a given handle in a room identified by a given key. More...

void	open_handle_room (struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_HashCode key)
	Marks a room known to a handle identified by a given key as open. More...

void	entry_handle_room_at (struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_PeerIdentity door, const struct GNUNET_HashCode *key)
	Adds a tunnel for a room known to a handle identified by a given key to a list of opened connections. More...

void	close_handle_room (struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_HashCode key)
	Destroys and so implicitly closes a room known to a handle identified by a given key. More...

struct GNUNET_MESSENGER_Room *	get_handle_room (struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_HashCode key)
	Returns the room known to a handle identified by a given key. More...

enum GNUNET_GenericReturnValue	store_handle_epoch_key (const struct GNUNET_MESSENGER_Handle handle, const struct GNUNET_HashCode key, const struct GNUNET_HashCode hash, const struct GNUNET_ShortHashCode identifier, const struct GNUNET_CRYPTO_SymmetricSessionKey shared_key, uint32_t flags, GNUNET_NAMESTORE_ContinuationWithStatus cont, void cont_cls, struct GNUNET_NAMESTORE_QueueEntry **query)
	Stores/deletes a shared_key for a given room from a handle identified by its key in an epoch with certain hash using a specific identifier for this epoch key. More...

Function Documentation

◆ create_handle()

struct GNUNET_MESSENGER_Handle * create_handle	(	const struct GNUNET_CONFIGURATION_Handle *	cfg,
		GNUNET_MESSENGER_MessageCallback	msg_callback,
		void *	msg_cls
	)

Creates and allocates a new handle using a given configuration and a custom message callback with a given closure for the client API.

Parameters

[in]	cfg	Configuration
[in]	msg_callback	Message callback
[in,out]	msg_cls	Closure

Returns: New handle

Definition at line 35 of file messenger_api_handle.c.

{
  struct GNUNET_MESSENGER_Handle *handle;
 
  GNUNET_assert (config);
 
  handle = GNUNET_new (struct GNUNET_MESSENGER_Handle);
 
  handle->config = config;
  handle->mq = NULL;
 
  handle->group_keys = GNUNET_CONFIGURATION_get_value_yesno (
    handle->config,
    GNUNET_MESSENGER_SERVICE_NAME,
    "MESSENGER_GROUP_KEYS");
 
  if (handle->config)
    handle->namestore = GNUNET_NAMESTORE_connect (handle->config);
 
  handle->msg_callback = msg_callback;
  handle->msg_cls = msg_cls;
 
  handle->name = NULL;
  handle->key = NULL;
  handle->pubkey = NULL;
 
  handle->reconnect_time = GNUNET_TIME_relative_get_zero_ ();
  handle->reconnect_task = NULL;
 
  handle->key_monitor = NULL;
 
  handle->rooms = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
 
  init_contact_store (get_handle_contact_store (handle));
 
  return handle;
}

References config, get_handle_contact_store(), GNUNET_assert, GNUNET_CONFIGURATION_get_value_yesno(), GNUNET_CONTAINER_multihashmap_create(), GNUNET_MESSENGER_SERVICE_NAME, GNUNET_NAMESTORE_connect(), GNUNET_new, GNUNET_NO, GNUNET_TIME_relative_get_zero_(), handle, init_contact_store(), GNUNET_VPN_Handle::mq, GNUNET_MESSENGER_Handle::msg_callback, and GNUNET_MESSENGER_Handle::msg_cls.

Referenced by GNUNET_MESSENGER_connect().

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◆ destroy_handle()

void destroy_handle ( struct GNUNET_MESSENGER_Handle * handle )

Destroys a handle and frees its memory fully from the client API.

Parameters

[in,out] handle Handle

Definition at line 93 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  clear_contact_store (get_handle_contact_store (handle));
 
  if (handle->rooms)
  {
    GNUNET_CONTAINER_multihashmap_iterate (
      handle->rooms, iterate_destroy_room, NULL);
 
    GNUNET_CONTAINER_multihashmap_destroy (handle->rooms);
  }
 
  if (handle->key_monitor)
    GNUNET_NAMESTORE_zone_monitor_stop (handle->key_monitor);
 
  if (handle->reconnect_task)
    GNUNET_SCHEDULER_cancel (handle->reconnect_task);
 
  if (handle->mq)
    GNUNET_MQ_destroy (handle->mq);
 
  if (handle->namestore)
    GNUNET_NAMESTORE_disconnect (handle->namestore);
 
  if (handle->name)
    GNUNET_free (handle->name);
 
  if (handle->key)
    GNUNET_free (handle->key);
 
  if (handle->pubkey)
    GNUNET_free (handle->pubkey);
 
  GNUNET_free (handle);
}

References clear_contact_store(), get_handle_contact_store(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_free, GNUNET_MQ_destroy(), GNUNET_NAMESTORE_disconnect(), GNUNET_NAMESTORE_zone_monitor_stop(), GNUNET_SCHEDULER_cancel(), handle, iterate_destroy_room(), and GNUNET_VPN_Handle::mq.

Referenced by GNUNET_MESSENGER_connect(), and GNUNET_MESSENGER_disconnect().

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◆ set_handle_name()

void set_handle_name	(	struct GNUNET_MESSENGER_Handle *	handle,
		const char *	name
	)

Sets the name of a handle to a specific name.

Parameters

[in,out]	handle	Handle
[in]	name	New name

Definition at line 133 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  if (handle->name)
    GNUNET_free (handle->name);
 
  handle->name = name ? GNUNET_strdup (name) : NULL;
}

References GNUNET_assert, GNUNET_free, GNUNET_strdup, handle, and name.

Referenced by GNUNET_MESSENGER_connect(), and GNUNET_MESSENGER_set_name().

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◆ get_handle_name()

const char * get_handle_name ( const struct GNUNET_MESSENGER_Handle * handle )

Returns the current name of a given handle or NULL if no valid name was assigned yet.

Parameters

[in] handle Handle

Returns: Name of the handle or NULL

Definition at line 146 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  return handle->name;
}

References GNUNET_assert, and handle.

Referenced by cb_key_error(), cb_key_sync(), GNUNET_MESSENGER_get_name(), handle_name_message(), iterate_send_name_to_room(), and send_message_to_room_with_key().

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◆ set_handle_key()

void set_handle_key	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_CRYPTO_PrivateKey *	key
	)

Sets the keypair of a given handle to the keypair of a specific private key.

Parameters

[in,out]	handle	Handle
[in]	key	Private key or NULL

Definition at line 380 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  if (handle->key_monitor)
  {
    GNUNET_NAMESTORE_zone_monitor_stop (handle->key_monitor);
    handle->key_monitor = NULL;
  }
 
  if (! key)
  {
    if (handle->key)
      GNUNET_free (handle->key);
 
    if (handle->pubkey)
      GNUNET_free (handle->pubkey);
 
    handle->key = NULL;
    handle->pubkey = NULL;
    return;
  }
 
  if (! handle->key)
    handle->key = GNUNET_new (struct GNUNET_CRYPTO_PrivateKey);
 
  if (! handle->pubkey)
    handle->pubkey = GNUNET_new (struct GNUNET_CRYPTO_PublicKey);
 
  GNUNET_memcpy (handle->key, key, sizeof(*key));
  GNUNET_CRYPTO_key_get_public (key, handle->pubkey);
 
  // Resets epoch and group keys as not stored yet
  GNUNET_CONTAINER_multihashmap_iterate (
    handle->rooms, it_room_store_keys, NULL);
 
  handle->key_monitor = GNUNET_NAMESTORE_zone_monitor_start2 (
    handle->config,
    handle->key,
    GNUNET_YES,
    cb_key_error,
    handle,
    cb_key_monitor,
    handle,
    cb_key_sync,
    handle,
    GNUNET_GNSRECORD_FILTER_NONE);
}

References cb_key_error(), cb_key_monitor(), cb_key_sync(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CRYPTO_key_get_public(), GNUNET_free, GNUNET_GNSRECORD_FILTER_NONE, GNUNET_memcpy, GNUNET_NAMESTORE_zone_monitor_start2(), GNUNET_NAMESTORE_zone_monitor_stop(), GNUNET_new, GNUNET_YES, handle, it_room_store_keys(), and key.

Referenced by GNUNET_MESSENGER_connect(), and GNUNET_MESSENGER_set_key().

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◆ get_handle_key()

const struct GNUNET_CRYPTO_PrivateKey * get_handle_key ( const struct GNUNET_MESSENGER_Handle * handle )

Returns the private key of a given handle.

Parameters

[in] handle Handle

Returns: Private key of the handle

Definition at line 432 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  if (handle->key)
    return handle->key;
 
  return get_anonymous_private_key ();
}

References get_anonymous_private_key(), GNUNET_assert, and handle.

Referenced by enqueue_message_to_room(), handle_member_id(), handle_private_message(), and store_handle_epoch_key().

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◆ get_handle_pubkey()

const struct GNUNET_CRYPTO_PublicKey * get_handle_pubkey ( const struct GNUNET_MESSENGER_Handle * handle )

Returns the public key of a given handle.

Parameters

[in] handle Handle

Returns: Public key of the handle

Definition at line 444 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  if (handle->pubkey)
    return handle->pubkey;
 
  return get_anonymous_public_key ();
}

References get_anonymous_public_key(), GNUNET_assert, and handle.

Referenced by get_handle_contact(), GNUNET_MESSENGER_get_key(), handle_join_message(), send_enter_room(), send_message_to_room_with_key(), and send_open_room().

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◆ get_handle_contact_store()

struct GNUNET_MESSENGER_ContactStore * get_handle_contact_store ( struct GNUNET_MESSENGER_Handle * handle )

Returns the used contact store of a given handle.

Parameters

[in,out] handle Handle

Returns: Contact store

Definition at line 456 of file messenger_api_handle.c.

{
  GNUNET_assert (handle);
 
  return &(handle->contact_store);
}

References GNUNET_assert, and handle.

Referenced by create_handle(), destroy_handle(), get_handle_contact(), handle_id_message(), handle_join_message(), handle_key_message(), handle_transcript_message(), process_message_control(), and task_message_control().

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◆ get_handle_contact()

struct GNUNET_MESSENGER_Contact * get_handle_contact	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_HashCode *	key
	)

Returns the contact of a given handle in a room identified by a given key.

Parameters

[in,out]	handle	Handle
[in]	key	Key of room

Returns: Contact

Definition at line 465 of file messenger_api_handle.c.

{
  struct GNUNET_MESSENGER_Room *room;
  const struct GNUNET_ShortHashCode *contact_id;
 
  GNUNET_assert ((handle) && (key));
 
  room = GNUNET_CONTAINER_multihashmap_get (handle->rooms, key);
 
  if (! room)
    return NULL;
 
  contact_id = get_room_sender_id (room);
 
  if (! contact_id)
    return NULL;
 
  {
    struct GNUNET_HashCode context;
    get_context_from_member (key, contact_id, &context);
 
    return get_store_contact (get_handle_contact_store (handle),
                              &context,
                              get_handle_pubkey (handle));
  }
}

References context, get_context_from_member(), get_handle_contact_store(), get_handle_pubkey(), get_room_sender_id(), get_store_contact(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), handle, and key.

Referenced by get_room_availble_epoch_entry(), handle_appeal_message(), handle_epoch_announcement(), and handle_private_message().

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◆ open_handle_room()

void open_handle_room	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_HashCode *	key
	)

Marks a room known to a handle identified by a given key as open.

Parameters

[in,out]	handle	Handle
[in]	key	Key of room

Definition at line 495 of file messenger_api_handle.c.

{
  struct GNUNET_MESSENGER_Room *room;
 
  GNUNET_assert ((handle) && (key));
 
  room = GNUNET_CONTAINER_multihashmap_get (handle->rooms, key);
 
  if (room)
    room->opened = GNUNET_YES;
}

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_YES, handle, key, and GNUNET_MESSENGER_Room::opened.

Referenced by handle_room_open().

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◆ entry_handle_room_at()

void entry_handle_room_at	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_PeerIdentity *	door,
		const struct GNUNET_HashCode *	key
	)

Adds a tunnel for a room known to a handle identified by a given key to a list of opened connections.

Parameters

[in,out]	handle	Handle
[in]	door	Peer identity
[in]	key	Key of room

Definition at line 510 of file messenger_api_handle.c.

{
  struct GNUNET_MESSENGER_Room *room;
 
  GNUNET_assert ((handle) && (door) && (key));
 
  room = GNUNET_CONTAINER_multihashmap_get (handle->rooms, key);
 
  if (room)
    add_to_list_tunnels (&(room->entries), door, NULL);
}

References add_to_list_tunnels(), GNUNET_MESSENGER_Room::entries, GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), handle, and key.

Referenced by handle_room_entry().

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◆ close_handle_room()

void close_handle_room	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_HashCode *	key
	)

Destroys and so implicitly closes a room known to a handle identified by a given key.

Parameters

[in,out]	handle	Handle
[in]	key	Key of room

Definition at line 526 of file messenger_api_handle.c.

{
  struct GNUNET_MESSENGER_Room *room;
 
  GNUNET_assert ((handle) && (key));
 
  room = GNUNET_CONTAINER_multihashmap_get (handle->rooms, key);
 
  if ((room) && (GNUNET_YES == GNUNET_CONTAINER_multihashmap_remove (
                   handle->rooms, key, room)))
    destroy_room (room);
}

References destroy_room(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_remove(), GNUNET_YES, handle, and key.

Referenced by handle_room_close().

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◆ get_handle_room()

struct GNUNET_MESSENGER_Room * get_handle_room	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_HashCode *	key
	)

Returns the room known to a handle identified by a given key.

Parameters

[in,out]	handle	handle Handle
[in]	key	Key of room

Returns: Room or NULL

Definition at line 542 of file messenger_api_handle.c.

{
  GNUNET_assert ((handle) && (key));
 
  return GNUNET_CONTAINER_multihashmap_get (handle->rooms, key);
}

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), handle, and key.

Referenced by cb_key_monitor(), handle_member_id(), handle_miss_message(), handle_recv_message(), handle_room_close(), handle_room_entry(), handle_room_open(), and handle_room_sync().

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◆ store_handle_epoch_key()

enum GNUNET_GenericReturnValue store_handle_epoch_key	(	const struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_HashCode *	key,
		const struct GNUNET_HashCode *	hash,
		const struct GNUNET_ShortHashCode *	identifier,
		const struct GNUNET_CRYPTO_SymmetricSessionKey *	shared_key,
		uint32_t	flags,
		GNUNET_NAMESTORE_ContinuationWithStatus	cont,
		void *	cont_cls,
		struct GNUNET_NAMESTORE_QueueEntry **	query
	)

Stores/deletes a shared_key for a given room from a handle identified by its key in an epoch with certain hash using a specific identifier for this epoch key.

Parameters

[in]	handle	Handle
[in]	key	Room key
[in]	hash	Epoch hash
[in]	identifier	Epoch key identifier
[in]	shared_key	Shared epoch key or NULL
[in]	flags	Epoch key flags
[in]	cont	Continuation status callback or NULL
[in]	cont_cls	Continuation closure or NULL
[out]	query

Returns: GNUNET_OK on success, otherwise GNUNET_SYSERR

Definition at line 552 of file messenger_api_handle.c.

{
  const struct GNUNET_CRYPTO_PrivateKey *zone;
  struct GNUNET_TIME_Absolute expiration;
  struct GNUNET_GNSRECORD_Data data;
  struct GNUNET_MESSENGER_RoomEpochKeyRecord record;
  char *label;
 
  GNUNET_assert ((handle) && (key) && (hash) && (identifier) && (query));
 
  if (! handle->namestore)
    return GNUNET_SYSERR;
 
  zone = get_handle_key (handle);
 
  if (! zone)
    return GNUNET_SYSERR;
 
  expiration = GNUNET_TIME_absolute_get_forever_ ();
 
  memset (&data, 0, sizeof (data));
  memset (&record, 0, sizeof (record));
 
  if (shared_key)
  {
    struct GNUNET_CRYPTO_SymmetricSessionKey skey;
    struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
 
    if (GNUNET_YES != GNUNET_CRYPTO_kdf (&skey, sizeof (skey),
                                         key, sizeof (*key),
                                         zone, sizeof (*zone),
                                         hash, sizeof (*hash),
                                         identifier, sizeof (*identifier),
                                         NULL))
      return GNUNET_SYSERR;
 
    GNUNET_memcpy (&(record.key), key, sizeof (record.key));
    GNUNET_memcpy (&(record.hash), hash, sizeof (record.hash));
    GNUNET_memcpy (
      &(record.identifier),
      identifier,
      sizeof (record.identifier));
 
    GNUNET_CRYPTO_symmetric_derive_iv (
      &iv,
      &skey,
      key, sizeof (*key),
      hash, sizeof (*hash),
      identifier, sizeof (*identifier),
      NULL);
 
    if (-1 == GNUNET_CRYPTO_symmetric_encrypt (shared_key,
                                               sizeof (*shared_key),
                                               &skey,
                                               &iv,
                                               &(record.shared_key)))
      return GNUNET_SYSERR;
 
    record.flags = flags;
 
    data.record_type = GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY;
    data.data = &record;
    data.data_size = sizeof (record);
    data.expiration_time = expiration.abs_value_us;
    data.flags = GNUNET_GNSRECORD_RF_PRIVATE;
 
    GNUNET_CRYPTO_zero_keys (&skey, sizeof (skey));
  }
 
  {
    char lower_key [9];
    char lower_hash [9];
    char lower_id [7];
    const char *s;
 
    memset (lower_key, 0, sizeof (lower_key));
    memset (lower_hash, 0, sizeof (lower_hash));
    memset (lower_id, 0, sizeof (lower_id));
 
    s = GNUNET_h2s (key);
    if (GNUNET_OK != GNUNET_STRINGS_utf8_tolower (s, lower_key))
      GNUNET_memcpy (lower_key, s, sizeof (lower_key));
 
    s = GNUNET_h2s (hash);
    if (GNUNET_OK != GNUNET_STRINGS_utf8_tolower (s, lower_hash))
      GNUNET_memcpy (lower_hash, s, sizeof (lower_hash));
 
    s = GNUNET_sh2s (identifier);
    if (GNUNET_OK != GNUNET_STRINGS_utf8_tolower (s, lower_id))
      GNUNET_memcpy (lower_id, s, sizeof (lower_id));
 
    GNUNET_asprintf (
      &label,
      "epoch_key_%s%s%s",
      lower_key,
      lower_hash,
      lower_id);
  }
 
  if (! label)
    return GNUNET_SYSERR;
 
  if (*query)
    GNUNET_NAMESTORE_cancel (*query);
 
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Store epoch key record with label: %s [%d]\n",
              label,
              shared_key? 1 : 0);
 
  *query = GNUNET_NAMESTORE_record_set_store (
    handle->namestore,
    zone,
    label,
    shared_key? 1 : 0,
    &data,
    cont,
    cont_cls);
 
  GNUNET_free (label);
  return GNUNET_OK;
}

References data, expiration, get_handle_key(), GNUNET_asprintf(), GNUNET_assert, GNUNET_CRYPTO_kdf(), GNUNET_CRYPTO_symmetric_derive_iv(), GNUNET_CRYPTO_symmetric_encrypt(), GNUNET_CRYPTO_zero_keys(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_GNSRECORD_RF_PRIVATE, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY, GNUNET_h2s(), GNUNET_log, GNUNET_memcpy, GNUNET_NAMESTORE_cancel(), GNUNET_NAMESTORE_record_set_store(), GNUNET_OK, GNUNET_sh2s(), GNUNET_STRINGS_utf8_tolower(), GNUNET_SYSERR, GNUNET_TIME_absolute_get_forever_(), GNUNET_YES, handle, GNUNET_MESSENGER_RoomEpochKeyRecord::hash, GNUNET_MESSENGER_RoomEpochKeyRecord::identifier, key, record(), and GNUNET_MESSENGER_RoomEpochKeyRecord::shared_key.

Referenced by write_epoch_announcement_record(), and write_epoch_group_record().

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Data Structures

Functions

Function Documentation

◆ create_handle()

◆ destroy_handle()

◆ set_handle_name()

◆ get_handle_name()

◆ set_handle_key()

◆ get_handle_key()

◆ get_handle_pubkey()

◆ get_handle_contact_store()

◆ get_handle_contact()

◆ open_handle_room()

◆ entry_handle_room_at()

◆ close_handle_room()

◆ get_handle_room()

◆ store_handle_epoch_key()