Revocation service

Perform and access key revocations. More...

Collaboration diagram for Revocation service:

Macros
#define	GNUNET_REVOCATION_VERSION   0x00000001
	Version of the key revocation API. More...

Typedefs
typedef void(*	GNUNET_REVOCATION_Callback) (void *cls, enum GNUNET_GenericReturnValue is_valid)
	Callback to call with the result of a key revocation query. More...

Functions
struct GNUNET_REVOCATION_Query *	GNUNET_REVOCATION_query (const struct GNUNET_CONFIGURATION_Handle *cfg, const struct GNUNET_CRYPTO_PublicKey *key, GNUNET_REVOCATION_Callback func, void *func_cls)
	Check if a key was revoked. More...
void	GNUNET_REVOCATION_query_cancel (struct GNUNET_REVOCATION_Query *q)
	Cancel key revocation check. More...
struct GNUNET_REVOCATION_Handle *	GNUNET_REVOCATION_revoke (const struct GNUNET_CONFIGURATION_Handle *cfg, const struct GNUNET_GNSRECORD_PowP *pow, GNUNET_REVOCATION_Callback func, void *func_cls)
	Perform key revocation. More...
void	GNUNET_REVOCATION_revoke_cancel (struct GNUNET_REVOCATION_Handle *h)
	Cancel key revocation. More...

Detailed Description

Perform and access key revocations.

See also

Documentation

Macro Definition Documentation

GNUNET_REVOCATION_VERSION

#define GNUNET_REVOCATION_VERSION   0x00000001

Version of the key revocation API.

Definition at line 58 of file gnunet_revocation_service.h.

Typedef Documentation

GNUNET_REVOCATION_Callback

typedef void(* GNUNET_REVOCATION_Callback) (void *cls, enum GNUNET_GenericReturnValue is_valid)

Callback to call with the result of a key revocation query.

Parameters

cls	closure
is_valid	GNUNET_NO of the key is/was revoked, GNUNET_YES if the key is still valid, GNUNET_SYSERR if we had trouble querying the service

Definition at line 75 of file gnunet_revocation_service.h.

Function Documentation

GNUNET_REVOCATION_query()

struct GNUNET_REVOCATION_Query * GNUNET_REVOCATION_query	(	const struct GNUNET_CONFIGURATION_Handle *	cfg,
		const struct GNUNET_CRYPTO_PublicKey *	key,
		GNUNET_REVOCATION_Callback	func,
		void *	func_cls
	)

Check if a key was revoked.

Parameters

cfg	the configuration to use
key	key to check for revocation
func	function to call with the result of the check
func_cls	closure to pass to func

Returns

handle to use in GNUNET_REVOCATION_query_cancel to stop REVOCATION from invoking the callback

Definition at line 108 of file revocation_api.c.

{
  struct GNUNET_REVOCATION_Query *q
    = GNUNET_new (struct GNUNET_REVOCATION_Query);
  struct GNUNET_MQ_MessageHandler handlers[] = {
    GNUNET_MQ_hd_fixed_size (revocation_query_response,
                             GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE,
                             struct QueryResponseMessage,
                             q),
    GNUNET_MQ_handler_end ()
  };
  struct QueryMessage *qm;
  struct GNUNET_MQ_Envelope *env;
  size_t key_len;
 
  q->mq = GNUNET_CLIENT_connect (cfg,
                                 "revocation",
                                 handlers,
                                 &query_mq_error_handler,
                                 q);
  if (NULL == q->mq)
  {
    GNUNET_free (q);
    return NULL;
  }
  q->func = func;
  q->func_cls = func_cls;
  key_len = GNUNET_CRYPTO_public_key_get_length (key);
  env = GNUNET_MQ_msg_extra (qm, key_len,
                             GNUNET_MESSAGE_TYPE_REVOCATION_QUERY);
  GNUNET_CRYPTO_write_public_key_to_buffer (key, &qm[1], key_len);
  qm->key_len = htonl (key_len);
  GNUNET_MQ_send (q->mq,
                  env);
  return q;
}

References cfg, env, GNUNET_REVOCATION_Query::func, GNUNET_REVOCATION_Query::func_cls, GNUNET_CLIENT_connect(), GNUNET_CRYPTO_public_key_get_length(), GNUNET_CRYPTO_write_public_key_to_buffer(), GNUNET_free, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_new, handlers, key, QueryMessage::key_len, GNUNET_REVOCATION_Query::mq, q, and query_mq_error_handler().

Referenced by recursive_gns_resolution_revocation(), and run().

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GNUNET_REVOCATION_query_cancel()

void GNUNET_REVOCATION_query_cancel

(

struct GNUNET_REVOCATION_Query *

q

)

Cancel key revocation check.

Parameters

q	query to cancel

Definition at line 155 of file revocation_api.c.

{
  if (NULL != q->mq)
  {
    GNUNET_MQ_destroy (q->mq);
    q->mq = NULL;
  }
  GNUNET_free (q);
}

References GNUNET_free, GNUNET_MQ_destroy(), GNUNET_REVOCATION_Query::mq, and q.

Referenced by do_shutdown(), GNS_resolver_lookup_cancel(), handle_revocation_query_response(), and query_mq_error_handler().

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GNUNET_REVOCATION_revoke()

struct GNUNET_REVOCATION_Handle * GNUNET_REVOCATION_revoke	(	const struct GNUNET_CONFIGURATION_Handle *	cfg,
		const struct GNUNET_GNSRECORD_PowP *	pow,
		GNUNET_REVOCATION_Callback	func,
		void *	func_cls
	)

Perform key revocation.

Parameters

cfg	the configuration to use
pow	proof of work to use (should have been created by iteratively calling #GNUNET_CRYPTO_pow_round)
func	function to call with the result of the check (called with is_valid being GNUNET_NO if the revocation worked).
func_cls	closure to pass to func

Returns

handle to use in GNUNET_REVOCATION_revoke_cancel to stop REVOCATION from invoking the callback

Parameters

cfg	the configuration to use
key	public key of the key to revoke
sig	signature to use on the revocation (should have been created using #GNUNET_REVOCATION_sign_revocation).
ts	revocation timestamp
pow	proof of work to use (should have been created by iteratively calling #GNUNET_REVOCATION_check_pow)
func	function to call with the result of the check (called with is_valid being GNUNET_NO if the revocation worked).
func_cls	closure to pass to func

Returns

handle to use in GNUNET_REVOCATION_revoke_cancel to stop REVOCATION from invoking the callback

Definition at line 249 of file revocation_api.c.

{
  struct GNUNET_REVOCATION_Handle *h
    = GNUNET_new (struct GNUNET_REVOCATION_Handle);
  struct GNUNET_MQ_MessageHandler handlers[] = {
    GNUNET_MQ_hd_fixed_size (revocation_response,
                             GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE,
                             struct RevocationResponseMessage,
                             h),
    GNUNET_MQ_handler_end ()
  };
  unsigned long long matching_bits;
  struct GNUNET_TIME_Relative epoch_duration;
  struct RevokeMessage *rm;
  struct GNUNET_MQ_Envelope *env;
 
  if ((GNUNET_OK !=
       GNUNET_CONFIGURATION_get_value_number (cfg,
                                              "REVOCATION",
                                              "WORKBITS",
                                              &matching_bits)))
  {
    GNUNET_break (0);
    GNUNET_free (h);
    return NULL;
  }
  if ((GNUNET_OK !=
       GNUNET_CONFIGURATION_get_value_time (cfg,
                                            "REVOCATION",
                                            "EPOCH_DURATION",
                                            &epoch_duration)))
  {
    GNUNET_break (0);
    GNUNET_free (h);
    return NULL;
  }
  if (GNUNET_YES != GNUNET_GNSRECORD_check_pow (pow,
                                                (unsigned int) matching_bits,
                                                epoch_duration))
  {
    GNUNET_break (0);
    GNUNET_free (h);
    return NULL;
  }
 
 
  h->mq = GNUNET_CLIENT_connect (cfg,
                                 "revocation",
                                 handlers,
                                 &revocation_mq_error_handler,
                                 h);
  if (NULL == h->mq)
  {
    GNUNET_free (h);
    return NULL;
  }
  h->func = func;
  h->func_cls = func_cls;
  size_t extra_len = GNUNET_GNSRECORD_proof_get_size (pow);
  env = GNUNET_MQ_msg_extra (rm,
                             extra_len,
                             GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE);
  rm->pow_size = htonl (extra_len);
  memcpy (&rm[1], pow, extra_len);
  GNUNET_MQ_send (h->mq,
                  env);
  return h;
}

References cfg, env, epoch_duration, GNUNET_break, GNUNET_CLIENT_connect(), GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONFIGURATION_get_value_time(), GNUNET_free, GNUNET_GNSRECORD_check_pow(), GNUNET_GNSRECORD_proof_get_size(), GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_new, GNUNET_OK, GNUNET_YES, h, handlers, matching_bits, GNUNET_ARM_Handle::mq, RevokeMessage::pow_size, and revocation_mq_error_handler().

Referenced by perform_revocation().

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GNUNET_REVOCATION_revoke_cancel()

void GNUNET_REVOCATION_revoke_cancel

(

struct GNUNET_REVOCATION_Handle *

h

)

Cancel key revocation.

Parameters

h	operation to cancel

Definition at line 323 of file revocation_api.c.

{
  if (NULL != h->mq)
  {
    GNUNET_MQ_destroy (h->mq);
    h->mq = NULL;
  }
  GNUNET_free (h);
}

References GNUNET_free, GNUNET_MQ_destroy(), h, and GNUNET_ARM_Handle::mq.

Referenced by do_shutdown(), handle_revocation_response(), and revocation_mq_error_handler().

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