Merge branch 'master' of git+ssh://gnunet.org/gnunet
[oweals/gnunet.git] / src / identity-provider / gnunet-service-identity-provider.c
index 8746e39f76d13e7cd0cfe2d122b7623051be8a31..711ae76cece7ab3697b269f0ec965956c7058d5d 100644 (file)
 #include "gnunet_identity_service.h"
 #include "gnunet_gnsrecord_lib.h"
 #include "gnunet_namestore_service.h"
+#include "gnunet_abe_lib.h"
 #include "gnunet_credential_service.h"
 #include "gnunet_statistics_service.h"
 #include "gnunet_gns_service.h"
+#include "gnunet_identity_provider_plugin.h"
+#include "gnunet_identity_attribute_lib.h"
 #include "gnunet_signatures.h"
 #include "identity_provider.h"
-#include "identity_token.h"
-#include <inttypes.h>
 
 /**
  * First pass state
  */
 static struct GNUNET_IDENTITY_Handle *identity_handle;
 
+/**
+ * Database handle
+ */
+static struct GNUNET_IDENTITY_PROVIDER_PluginFunctions *TKT_database;
+
+/**
+ * Name of DB plugin
+ */
+static char *db_lib_name;
+
 /**
  * Token expiration interval
  */
@@ -129,43 +140,251 @@ static struct GNUNET_STATISTICS_Handle *stats;
  */
 static const struct GNUNET_CONFIGURATION_Handle *cfg;
 
-struct VerifiedAttributeEntry
+/**
+ * An idp client
+ */
+struct IdpClient;
+
+/**
+ * A ticket iteration operation.
+ */
+struct TicketIteration
 {
   /**
    * DLL
    */
-  struct VerifiedAttributeEntry *prev;
+  struct TicketIteration *next;
 
   /**
    * DLL
    */
-  struct VerifiedAttributeEntry *next;
+  struct TicketIteration *prev;
+
+  /**
+   * Client which intiated this zone iteration
+   */
+  struct IdpClient *client;
+
+  /**
+   * Key of the identity we are iterating over.
+   */
+  struct GNUNET_CRYPTO_EcdsaPublicKey identity;
+
+  /**
+   * Identity is audience
+   */
+  uint32_t is_audience;
+
+  /**
+   * The operation id fot the iteration in the response for the client
+   */
+  uint32_t r_id;
 
   /**
-   * Attribute Name
+   * Offset of the iteration used to address next result of the 
+   * iteration in the store
+   *
+   * Initialy set to 0 in handle_iteration_start
+   * Incremented with by every call to handle_iteration_next
    */
-  char* name;
+  uint32_t offset;
+
 };
 
-struct ParallelLookups;
 
-struct ExchangeHandle
+
+/**
+ * Callback after an ABE bootstrap
+ *
+ * @param cls closure
+ * @param abe_key the ABE key that exists or was created
+ */
+typedef void
+(*AbeBootstrapResult) (void *cls,
+                       struct GNUNET_ABE_AbeMasterKey *abe_key);
+
+
+struct AbeBootstrapHandle
 {
+  /**
+   * Function to call when finished
+   */
+  AbeBootstrapResult proc;
 
   /**
-   * Client connection
+   * Callback closure
+   */
+  char *proc_cls;
+
+  /**
+   * Key of the zone we are iterating over.
+   */
+  struct GNUNET_CRYPTO_EcdsaPrivateKey identity;
+
+  /**
+   * Namestore Queue Entry
+   */
+  struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
+
+  /**
+   * The issuer egos ABE master key
+   */
+  struct GNUNET_ABE_AbeMasterKey *abe_key;
+};
+
+/**
+ * An attribute iteration operation.
+ */
+struct AttributeIterator
+{
+  /**
+   * Next element in the DLL
+   */
+  struct AttributeIterator *next;
+
+  /**
+   * Previous element in the DLL
+   */
+  struct AttributeIterator *prev;
+
+  /**
+   * IDP client which intiated this zone iteration
+   */
+  struct IdpClient *client;
+
+  /**
+   * Key of the zone we are iterating over.
+   */
+  struct GNUNET_CRYPTO_EcdsaPrivateKey identity;
+
+  /**
+   * The issuer egos ABE master key
+   */
+  struct GNUNET_ABE_AbeMasterKey *abe_key;
+
+  /**
+   * Namestore iterator
+   */
+  struct GNUNET_NAMESTORE_ZoneIterator *ns_it;
+
+  /**
+   * The operation id fot the zone iteration in the response for the client
+   */
+  uint32_t request_id;
+
+};
+
+
+
+/**
+ * An idp client
+ */
+struct IdpClient
+{
+
+  /**
+   * The client
    */
   struct GNUNET_SERVICE_Client *client;
 
   /**
-   * Ticket
+   * Message queue for transmission to @e client
+   */
+  struct GNUNET_MQ_Handle *mq;
+  
+  /**
+   * Head of the DLL of
+   * Attribute iteration operations in 
+   * progress initiated by this client
+   */
+  struct AttributeIterator *op_head;
+
+  /**
+   * Tail of the DLL of
+   * Attribute iteration operations 
+   * in progress initiated by this client
+   */
+  struct AttributeIterator *op_tail;
+
+  /**
+   * Head of DLL of ticket iteration ops
+   */
+  struct TicketIteration *ticket_iter_head;
+
+  /**
+   * Tail of DLL of ticket iteration ops
+   */
+  struct TicketIteration *ticket_iter_tail;
+
+
+  /**
+   * Head of DLL of ticket revocation ops
+   */
+  struct TicketRevocationHandle *revocation_list_head;
+
+  /**
+   * Tail of DLL of ticket revocation ops
+   */
+  struct TicketRevocationHandle *revocation_list_tail;
+};
+
+
+
+struct AttributeStoreHandle
+{
+
+  /**
+   * Client connection
+   */
+  struct IdpClient *client;
+
+  /**
+   * Identity
+   */
+  struct GNUNET_CRYPTO_EcdsaPrivateKey identity;
+
+  /**
+   * Identity pubkey
+   */
+  struct GNUNET_CRYPTO_EcdsaPublicKey identity_pkey;
+
+  /**
+   * The issuer egos ABE master key
+   */
+  struct GNUNET_ABE_AbeMasterKey *abe_key;
+
+  /**
+   * QueueEntry
+   */
+  struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
+
+  /**
+   * The attribute to store
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_Claim *claim;
+
+  /**
+   * request id
+   */
+  uint32_t r_id;
+};
+
+
+/* Prototype */
+struct ParallelLookup;
+
+struct ConsumeTicketHandle
+{
+
+  /**
+   * Client connection
    */
-  struct TokenTicket *ticket;
+  struct IdpClient *client;
 
   /**
-   * Token returned
+   * Ticket
    */
-  struct IdentityToken *token;
+  struct GNUNET_IDENTITY_PROVIDER_Ticket ticket;
 
   /**
    * LookupRequest
@@ -175,128 +394,173 @@ struct ExchangeHandle
   /**
    * Audience Key
    */
-  struct GNUNET_CRYPTO_EcdsaPrivateKey aud_privkey;
-  
+  struct GNUNET_CRYPTO_EcdsaPrivateKey identity;
+
+  /**
+   * Audience Key
+   */
+  struct GNUNET_CRYPTO_EcdsaPublicKey identity_pub;
+
   /**
-   * ParallelLookups DLL
+   * Lookup DLL
    */
   struct ParallelLookup *parallel_lookups_head;
+
+  /**
+   * Lookup DLL
+   */
   struct ParallelLookup *parallel_lookups_tail;
   
+  /**
+   * Kill task
+   */
   struct GNUNET_SCHEDULER_Task *kill_task;
-  struct GNUNET_CRYPTO_AbeKey *key;
 
   /**
-   * Label to return
+   * The ABE key
    */
-  char *label;
+  struct GNUNET_ABE_AbeKey *key;
 
+  /**
+   * Attributes
+   */
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs;
+  
+  /**
+   * Lookup time
+   */
+  struct GNUNET_TIME_Absolute lookup_start_time;
   /**
    * request id
    */
   uint32_t r_id;
 };
 
+/**
+ * Handle for a parallel GNS lookup job
+ */
 struct ParallelLookup
 {
+  /* DLL */
   struct ParallelLookup *next;
 
+  /* DLL */
   struct ParallelLookup *prev;
 
+  /* The GNS request */
   struct GNUNET_GNS_LookupRequest *lookup_request;
 
-  struct ExchangeHandle *handle;
+  /* The handle the return to */
+  struct ConsumeTicketHandle *handle;
+
+  /**
+   * Lookup time
+   */
+  struct GNUNET_TIME_Absolute lookup_start_time;
 
+  /* The label to look up */
   char *label;
 };
 
-struct IssueHandle
+/**
+ * Ticket revocation request handle
+ */
+struct TicketRevocationHandle
 {
-
   /**
-   * Client connection
+   * DLL
    */
-  struct GNUNET_SERVICE_Client *client;
+  struct TicketRevocationHandle *next;
 
   /**
-   * Issuer Key
+   * DLL
    */
-  struct GNUNET_CRYPTO_EcdsaPrivateKey iss_key;
+  struct TicketRevocationHandle *prev;
 
   /**
-   * Issue pubkey
+   * Client connection
    */
-  struct GNUNET_CRYPTO_EcdsaPublicKey iss_pkey;
+  struct IdpClient *client;
 
   /**
-   * Audience Key
+   * Attributes to reissue
    */
-  struct GNUNET_CRYPTO_EcdsaPublicKey aud_key;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs;
 
   /**
-   * The issuer egos ABE master key
+   * Attributes to revoke
    */
-  struct GNUNET_CRYPTO_AbeMasterKey *abe_key;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *rvk_attrs;
 
   /**
-   * Expiration
+   * Issuer Key
    */
-  struct GNUNET_TIME_Absolute expiration;
+  struct GNUNET_CRYPTO_EcdsaPrivateKey identity;
 
   /**
-   * Scopes
+   * Ticket to issue
    */
-  char *scopes;
+  struct GNUNET_IDENTITY_PROVIDER_Ticket ticket;
 
   /**
-   * DLL
+   * QueueEntry
    */
-  struct VerifiedAttributeEntry *v_attr_head;
+  struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
 
   /**
-   * DLL
+   * Namestore iterator
    */
-  struct VerifiedAttributeEntry *v_attr_tail;
+  struct GNUNET_NAMESTORE_ZoneIterator *ns_it;
 
   /**
-   * nonce
+   * The ABE master key
    */
-  uint64_t nonce;
+  struct GNUNET_ABE_AbeMasterKey *abe_key;
 
   /**
-   * NS iterator
+   * Offset
    */
-  struct GNUNET_NAMESTORE_ZoneIterator *ns_it;
+  uint32_t offset;
 
   /**
-   * Cred request
+   * request id
    */
-  struct GNUNET_CREDENTIAL_Request *credential_request;
+  uint32_t r_id;
+};
+
+
+
+/**
+ * Ticket issue request handle
+ */
+struct TicketIssueHandle
+{
 
   /**
-   * Attribute map
+   * Client connection
    */
-  struct GNUNET_CONTAINER_MultiHashMap *attr_map;
+  struct IdpClient *client;
 
   /**
-   * Token
+   * Attributes to issue
    */
-  struct IdentityToken *token;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs;
 
   /**
-   * Ticket
+   * Issuer Key
    */
-  struct TokenTicket *ticket;
+  struct GNUNET_CRYPTO_EcdsaPrivateKey identity;
 
   /**
-   * QueueEntry
+   * Ticket to issue
    */
-  struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
+  struct GNUNET_IDENTITY_PROVIDER_Ticket ticket;
 
   /**
-   * The label the token is stored under
+   * QueueEntry
    */
-  char *label;
+  struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
 
   /**
    * request id
@@ -304,6 +568,7 @@ struct IssueHandle
   uint32_t r_id;
 };
 
+
 /**
  * DLL for ego handles to egos containing the ID_ATTRS in a map in json_t format
  *
@@ -345,7 +610,10 @@ cleanup()
     GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
     stats = NULL;
   }
-
+  GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name,
+                                              TKT_database)); 
+  GNUNET_free (db_lib_name);
+  db_lib_name = NULL;
   if (NULL != timeout_task)
     GNUNET_SCHEDULER_cancel (timeout_task);
   if (NULL != update_task)
@@ -362,10 +630,8 @@ cleanup()
     GNUNET_NAMESTORE_cancel (ns_qe);
   if (NULL != ns_handle)
     GNUNET_NAMESTORE_disconnect (ns_handle);
-  if (NULL != token)
-    GNUNET_free (token);
-  if (NULL != label)
-    GNUNET_free (label);
+  GNUNET_free_non_null (token);
+  GNUNET_free_non_null (label);
 
 }
 
@@ -373,7 +639,6 @@ cleanup()
  * Shutdown task
  *
  * @param cls NULL
- * @param tc task context
  */
 static void
 do_shutdown (void *cls)
@@ -383,120 +648,130 @@ do_shutdown (void *cls)
   cleanup();
 }
 
-
-static struct GNUNET_MQ_Envelope*
-create_exchange_result_message (const char* token,
-                                const char* label,
-                                uint64_t ticket_nonce,
-                                uint64_t id)
+/**
+ * Finished storing newly bootstrapped ABE key
+ */
+static void
+bootstrap_store_cont (void *cls,
+                      int32_t success,
+                      const char *emsg)
 {
-  struct GNUNET_MQ_Envelope *env;
-  struct ExchangeResultMessage *erm;
-  uint16_t token_len = strlen (token) + 1;
-
-  env = GNUNET_MQ_msg_extra (erm,
-                             token_len,
-                             GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE_RESULT);
-  erm->ticket_nonce = htonl (ticket_nonce);
-  erm->id = id;
-  GNUNET_memcpy (&erm[1], token, token_len);
-  return env;
+  struct AbeBootstrapHandle *abh = cls;
+  if (GNUNET_SYSERR == success)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to bootstrap ABE master %s\n",
+                emsg);
+    abh->proc (abh->proc_cls, NULL);
+    GNUNET_free (abh->abe_key);
+    GNUNET_free (abh);
+    return;
+  }
+  abh->proc (abh->proc_cls, abh->abe_key);
+  GNUNET_free (abh);
 }
 
-
-static struct GNUNET_MQ_Envelope*
-create_issue_result_message (const char* label,
-                             const char* ticket,
-                             const char* token,
-                             uint64_t id)
+/**
+ * Generates and stores a new ABE key
+ */
+static void
+bootstrap_store_task (void *cls)
 {
-  struct GNUNET_MQ_Envelope *env;
-  struct IssueResultMessage *irm;
-  char *tmp_str;
-  size_t len;
+  struct AbeBootstrapHandle *abh = cls;
+  struct GNUNET_GNSRECORD_Data rd[1];
+  char *key;
 
-  GNUNET_asprintf (&tmp_str, "%s,%s,%s", label, ticket, token);
-  len = strlen (tmp_str) + 1;
-  env = GNUNET_MQ_msg_extra (irm,
-                             len,
-                             GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE_RESULT);
-  irm->id = id;
-  GNUNET_memcpy (&irm[1], tmp_str, strlen (tmp_str) + 1);
-  GNUNET_free (tmp_str);
-  return env;
+  rd[0].data_size = GNUNET_ABE_cpabe_serialize_master_key (abh->abe_key,
+                                                              (void**)&key);
+  rd[0].data = key;
+  rd[0].record_type = GNUNET_GNSRECORD_TYPE_ABE_MASTER;
+  rd[0].flags = GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION | GNUNET_GNSRECORD_RF_PRIVATE;
+  rd[0].expiration_time = GNUNET_TIME_UNIT_HOURS.rel_value_us; //TODO sane?
+  abh->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
+                                               &abh->identity,
+                                               "+",
+                                               1,
+                                               rd,
+                                               &bootstrap_store_cont,
+                                               abh);
+  GNUNET_free (key);
 }
 
+/**
+ * Error checking for ABE master
+ */
 static void
-cleanup_issue_handle (struct IssueHandle *handle)
-{
-  if (NULL != handle->attr_map)
-    GNUNET_CONTAINER_multihashmap_destroy (handle->attr_map);
-  if (NULL != handle->scopes)
-    GNUNET_free (handle->scopes);
-  if (NULL != handle->token)
-    token_destroy (handle->token);
-  if (NULL != handle->ticket)
-    ticket_destroy (handle->ticket);
-  if (NULL != handle->label)
-    GNUNET_free (handle->label);
-  if (NULL != handle->ns_it)
-    GNUNET_NAMESTORE_zone_iteration_stop (handle->ns_it);
-  if (NULL != handle->credential_request)
-    GNUNET_CREDENTIAL_request_cancel (handle->credential_request);
-  GNUNET_free (handle);
+bootstrap_abe_error (void *cls)
+{
+  struct AbeBootstrapHandle *abh = cls;
+  GNUNET_free (abh);
+  abh->proc (abh->proc_cls, NULL);
+  GNUNET_free (abh);
 }
 
+
+/**
+ * Handle ABE lookup in namestore
+ */
 static void
-store_record_issue_cont (void *cls,
-                        int32_t success,
-                        const char *emsg)
+bootstrap_abe_result (void *cls,
+                      const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
+                      const char *label,
+                      unsigned int rd_count,
+                      const struct GNUNET_GNSRECORD_Data *rd)
 {
-  struct IssueHandle *handle = cls;
-  struct GNUNET_MQ_Envelope *env;
-  char *ticket_str;
-  char *token_str;
+  struct AbeBootstrapHandle *abh = cls;
+  struct GNUNET_ABE_AbeMasterKey *abe_key;
 
-  handle->ns_qe = NULL;
-  if (GNUNET_SYSERR == success)
-  {
-    cleanup_issue_handle (handle);
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
-                "Unknown Error\n");
-    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
+  for (uint32_t i=0;i<rd_count;i++) {
+    if (GNUNET_GNSRECORD_TYPE_ABE_MASTER != rd[i].record_type)
+      continue;
+    abe_key = GNUNET_ABE_cpabe_deserialize_master_key (rd[i].data,
+                                                          rd[i].data_size);
+    abh->proc (abh->proc_cls, abe_key);
+    GNUNET_free (abh);
     return;
   }
-  if (GNUNET_OK != ticket_serialize (handle->ticket,
-                                     &handle->iss_key,
-                                     &ticket_str))
+
+  //No ABE master found, bootstrapping...
+  abh->abe_key = GNUNET_ABE_cpabe_create_master_key ();
+  GNUNET_SCHEDULER_add_now (&bootstrap_store_task, abh);
+}
+
+/**
+ * Bootstrap ABE master if it does not yet exists.
+ * Will call the AbeBootstrapResult processor when done.
+ * will always recreate the ABE key of GNUNET_YES == recreate
+ */
+static void
+bootstrap_abe (const struct GNUNET_CRYPTO_EcdsaPrivateKey *identity,
+               AbeBootstrapResult proc,
+               void* cls,
+               int recreate)
+{
+  struct AbeBootstrapHandle *abh;
+
+  abh = GNUNET_new (struct AbeBootstrapHandle);
+  abh->proc = proc;
+  abh->proc_cls = cls;
+  abh->identity = *identity;
+  if (GNUNET_YES == recreate)
   {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
-                "Error serializing ticket\n");
-    cleanup_issue_handle (handle);
-    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
-    return;
-  }
-  if (GNUNET_OK != token_to_string (handle->token,
-                                    &handle->iss_key,
-                                    &token_str))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
-                "Error serializing token\n");
-    GNUNET_free (ticket_str);
-    cleanup_issue_handle (handle);
-    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
-    return;
+    abh->abe_key = GNUNET_ABE_cpabe_create_master_key ();
+    GNUNET_SCHEDULER_add_now (&bootstrap_store_task, abh);
+  } else {
+    abh->ns_qe = GNUNET_NAMESTORE_records_lookup (ns_handle,
+                                                  identity,
+                                                  "+",
+                                                  &bootstrap_abe_error,
+                                                  abh,
+                                                  &bootstrap_abe_result,
+                                                  abh);
   }
-  env = create_issue_result_message (handle->label,
-                                     ticket_str,
-                                     token_str,
-                                     handle->r_id);
-  GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq(handle->client),
-                  env);
-  cleanup_issue_handle (handle);
-  GNUNET_free (ticket_str);
-  GNUNET_free (token_str);
 }
 
+
+
 static int
 create_sym_key_from_ecdh(const struct GNUNET_HashCode *new_key_hash,
                          struct GNUNET_CRYPTO_SymmetricSessionKey *skey,
@@ -520,44 +795,133 @@ create_sym_key_from_ecdh(const struct GNUNET_HashCode *new_key_hash,
   return GNUNET_OK;
 }
 
+static void
+cleanup_ticket_issue_handle (struct TicketIssueHandle *handle)
+{
+  if (NULL != handle->attrs)
+    GNUNET_IDENTITY_ATTRIBUTE_list_destroy (handle->attrs);
+  if (NULL != handle->ns_qe)
+    GNUNET_NAMESTORE_cancel (handle->ns_qe);
+  GNUNET_free (handle);
+}
+
+
+static void
+send_ticket_result (struct IdpClient *client,
+                    uint32_t r_id,
+                    const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket,
+                    const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs)
+{
+  struct TicketResultMessage *irm;
+  struct GNUNET_MQ_Envelope *env;
+  struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket_buf;
+
+  /* store ticket in DB */
+  if (GNUNET_OK != TKT_database->store_ticket (TKT_database->cls,
+                                               ticket,
+                                               attrs))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unable to store ticket after issue\n");
+    GNUNET_break (0);
+  }
+
+  env = GNUNET_MQ_msg_extra (irm,
+                             sizeof (struct GNUNET_IDENTITY_PROVIDER_Ticket),
+                             GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_TICKET_RESULT);
+  ticket_buf = (struct GNUNET_IDENTITY_PROVIDER_Ticket *)&irm[1];
+  *ticket_buf = *ticket;
+  irm->id = htonl (r_id);
+  GNUNET_MQ_send (client->mq,
+                  env);
+}
+
+static void
+store_ticket_issue_cont (void *cls,
+                         int32_t success,
+                         const char *emsg)
+{
+  struct TicketIssueHandle *handle = cls;
+
+  handle->ns_qe = NULL;
+  if (GNUNET_SYSERR == success)
+  {
+    cleanup_ticket_issue_handle (handle);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
+                "Unknown Error\n");
+    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
+    return;
+  }
+  send_ticket_result (handle->client,
+                      handle->r_id,
+                      &handle->ticket,
+                      handle->attrs);
+  cleanup_ticket_issue_handle (handle);
+}
+
+
+
 int
-serialize_abe_keyinfo (const struct IssueHandle *handle,
-                 const struct GNUNET_CRYPTO_AbeKey *rp_key,
-                 struct GNUNET_CRYPTO_EcdhePrivateKey **ecdh_privkey,
-                 char **result)
+serialize_abe_keyinfo2 (const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket,
+                        const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs,
+                        const struct GNUNET_ABE_AbeKey *rp_key,
+                        struct GNUNET_CRYPTO_EcdhePrivateKey **ecdh_privkey,
+                        char **result)
 {
+  struct GNUNET_CRYPTO_EcdhePublicKey ecdh_pubkey;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *le;
   char *enc_keyinfo;
   char *serialized_key;
   char *buf;
-  struct GNUNET_CRYPTO_EcdhePublicKey ecdh_pubkey;
+  char *write_ptr;
+  char attrs_str_len;
   ssize_t size;
-  
+
   struct GNUNET_CRYPTO_SymmetricSessionKey skey;
   struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
   struct GNUNET_HashCode new_key_hash;
   ssize_t enc_size;
-  
-  size = GNUNET_CRYPTO_cpabe_serialize_key (rp_key,
+
+  size = GNUNET_ABE_cpabe_serialize_key (rp_key,
                                             (void**)&serialized_key);
-  buf = GNUNET_malloc (strlen (handle->scopes) + 1 + size);
-  GNUNET_memcpy (buf,
-                 handle->scopes,
-                 strlen (handle->scopes) + 1);
-  GNUNET_memcpy (buf + strlen (handle->scopes) + 1,
+  attrs_str_len = 0;
+  for (le = attrs->list_head; NULL != le; le = le->next) {
+    attrs_str_len += strlen (le->claim->name) + 1;
+  }
+  buf = GNUNET_malloc (attrs_str_len + size);
+  write_ptr = buf;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Writing attributes\n");
+  for (le = attrs->list_head; NULL != le; le = le->next) {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "%s\n", le->claim->name);
+
+
+    GNUNET_memcpy (write_ptr,
+                   le->claim->name,
+                   strlen (le->claim->name));
+    write_ptr[strlen (le->claim->name)] = ',';
+    write_ptr += strlen (le->claim->name) + 1;
+  }
+  write_ptr--;
+  write_ptr[0] = '\0'; //replace last , with a 0-terminator
+  write_ptr++;
+  GNUNET_memcpy (write_ptr,
                  serialized_key,
                  size);
+  GNUNET_free (serialized_key);
   // ECDH keypair E = eG
   *ecdh_privkey = GNUNET_CRYPTO_ecdhe_key_create();
   GNUNET_CRYPTO_ecdhe_key_get_public (*ecdh_privkey,
                                       &ecdh_pubkey);
-  enc_keyinfo = GNUNET_malloc (size + strlen (handle->scopes) + 1);
+  enc_keyinfo = GNUNET_malloc (size + attrs_str_len);
   // Derived key K = H(eB)
   GNUNET_assert (GNUNET_OK == GNUNET_CRYPTO_ecdh_ecdsa (*ecdh_privkey,
-                                                        &handle->aud_key,
+                                                        &ticket->audience,
                                                         &new_key_hash));
   create_sym_key_from_ecdh(&new_key_hash, &skey, &iv);
   enc_size = GNUNET_CRYPTO_symmetric_encrypt (buf,
-                                              size + strlen (handle->scopes) + 1,
+                                              size + attrs_str_len,
                                               &skey, &iv,
                                               enc_keyinfo);
   *result = GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_EcdhePublicKey)+
@@ -569,393 +933,697 @@ serialize_abe_keyinfo (const struct IssueHandle *handle,
                  enc_keyinfo,
                  enc_size);
   GNUNET_free (enc_keyinfo);
+  GNUNET_free (buf);
   return sizeof (struct GNUNET_CRYPTO_EcdhePublicKey)+enc_size;
 }
 
+
+
 static void
-cleanup_exchange_handle (struct ExchangeHandle *handle)
+issue_ticket_after_abe_bootstrap (void *cls,
+                                  struct GNUNET_ABE_AbeMasterKey *abe_key)
 {
-  if (NULL != handle->ticket)
-    ticket_destroy (handle->ticket);
-  if (NULL != handle->token)
-    token_destroy (handle->token);
-  GNUNET_free (handle);
+  struct TicketIssueHandle *ih = cls;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *le;
+  struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe_privkey;
+  struct GNUNET_GNSRECORD_Data code_record[1];
+  struct GNUNET_ABE_AbeKey *rp_key;
+  char *code_record_data;
+  char **attrs;
+  char *label;
+  char *policy;
+  int attrs_len;
+  uint32_t i;
+  size_t code_record_len;
+
+  //Create new ABE key for RP
+  attrs_len = 0;
+  for (le = ih->attrs->list_head; NULL != le; le = le->next)
+    attrs_len++;
+  attrs = GNUNET_malloc ((attrs_len + 1)*sizeof (char*));
+  i = 0;
+  for (le = ih->attrs->list_head; NULL != le; le = le->next) {
+    GNUNET_asprintf (&policy, "%s_%lu",
+                     le->claim->name,
+                     le->claim->version);
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Adding attribute to key: %s\n",
+                policy);
+    attrs[i] = policy;
+    i++;
+  }
+  attrs[i] = NULL;
+  rp_key = GNUNET_ABE_cpabe_create_key (abe_key,
+                                           attrs);
+
+  //TODO review this wireformat
+  code_record_len = serialize_abe_keyinfo2 (&ih->ticket,
+                                            ih->attrs,
+                                            rp_key,
+                                            &ecdhe_privkey,
+                                            &code_record_data);
+  code_record[0].data = code_record_data;
+  code_record[0].data_size = code_record_len;
+  code_record[0].expiration_time = GNUNET_TIME_UNIT_DAYS.rel_value_us;
+  code_record[0].record_type = GNUNET_GNSRECORD_TYPE_ABE_KEY;
+  code_record[0].flags = GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION;
+
+  label = GNUNET_STRINGS_data_to_string_alloc (&ih->ticket.rnd,
+                                               sizeof (uint64_t));
+  //Publish record
+  ih->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
+                                              &ih->identity,
+                                              label,
+                                              1,
+                                              code_record,
+                                              &store_ticket_issue_cont,
+                                              ih);
+  //for (; i > 0; i--)
+  //  GNUNET_free (attrs[i-1]);
+  GNUNET_free (ecdhe_privkey);
+  GNUNET_free (label);
+  GNUNET_free (attrs);
+  GNUNET_free (code_record_data);
+  GNUNET_ABE_cpabe_delete_key (rp_key,
+                                  GNUNET_YES);
+  GNUNET_ABE_cpabe_delete_master_key (abe_key);
+}
+
+
+static int
+check_issue_ticket_message(void *cls,
+                           const struct IssueTicketMessage *im)
+{
+  uint16_t size;
+
+  size = ntohs (im->header.size);
+  if (size <= sizeof (struct IssueTicketMessage))
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
+static void
+handle_issue_ticket_message (void *cls,
+                             const struct IssueTicketMessage *im)
+{
+  struct TicketIssueHandle *ih;
+  struct IdpClient *idp = cls;
+  size_t attrs_len;
+
+  ih = GNUNET_new (struct TicketIssueHandle);
+  attrs_len = ntohs (im->attr_len);
+  ih->attrs = GNUNET_IDENTITY_ATTRIBUTE_list_deserialize ((char*)&im[1], attrs_len);
+  ih->r_id = ntohl (im->id);
+  ih->client = idp;
+  ih->identity = im->identity;
+  GNUNET_CRYPTO_ecdsa_key_get_public (&ih->identity,
+                                      &ih->ticket.identity);
+  ih->ticket.audience = im->rp;
+  ih->ticket.rnd =
+    GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
+                              UINT64_MAX);
+  bootstrap_abe (&ih->identity, &issue_ticket_after_abe_bootstrap, ih, GNUNET_NO);
+  GNUNET_SERVICE_client_continue (idp->client);
+
 }
 
+/**********************************************************
+ * Revocation
+ **********************************************************/
 
 /**
- * Build a token and store it
+ * Cleanup revoke handle
  *
- * @param cls the IssueHandle
+ * @param rh the ticket revocation handle
  */
 static void
-sign_and_return_token (void *cls)
+cleanup_revoke_ticket_handle (struct TicketRevocationHandle *rh)
 {
-  struct ExchangeHandle *handle = cls;
-  struct GNUNET_MQ_Envelope *env;
-  char *token_str;
-  uint64_t time;
-  uint64_t exp_time;
+  if (NULL != rh->attrs)
+    GNUNET_IDENTITY_ATTRIBUTE_list_destroy (rh->attrs);
+  if (NULL != rh->rvk_attrs)
+    GNUNET_IDENTITY_ATTRIBUTE_list_destroy (rh->rvk_attrs);
+  if (NULL != rh->abe_key)
+    GNUNET_ABE_cpabe_delete_master_key (rh->abe_key);
+  if (NULL != rh->ns_qe)
+    GNUNET_NAMESTORE_cancel (rh->ns_qe);
+  if (NULL != rh->ns_it)
+    GNUNET_NAMESTORE_zone_iteration_stop (rh->ns_it);
+  GNUNET_free (rh);
+}
 
-  time = GNUNET_TIME_absolute_get().abs_value_us;
-  exp_time = time + token_expiration_interval.rel_value_us;
 
-  token_add_attr_int (handle->token, "nbf", time);
-  token_add_attr_int (handle->token, "iat", time);
-  token_add_attr_int (handle->token, "exp", exp_time);
-  
-  //Readable
-  GNUNET_assert (GNUNET_OK == token_to_string (handle->token,
-                                               &handle->aud_privkey,
-                                               &token_str));
-
-  env = create_exchange_result_message (token_str,
-                                        handle->label,
-                                        handle->ticket->payload->nonce,
-                                        handle->r_id);
-  GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq(handle->client),
+/**
+ * Send revocation result
+ *
+ * @param rh ticket revocation handle
+ * @param success GNUNET_OK if successful result
+ */
+static void
+send_revocation_finished (struct TicketRevocationHandle *rh,
+                          uint32_t success)
+{
+  struct GNUNET_MQ_Envelope *env;
+  struct RevokeTicketResultMessage *trm;
+
+  env = GNUNET_MQ_msg (trm,
+                       GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_REVOKE_TICKET_RESULT);
+  trm->id = htonl (rh->r_id);
+  trm->success = htonl (success);
+  GNUNET_MQ_send (rh->client->mq,
                   env);
-  cleanup_exchange_handle (handle);
-  GNUNET_free (token_str);
+  GNUNET_CONTAINER_DLL_remove (rh->client->revocation_list_head,
+                               rh->client->revocation_list_tail,
+                               rh);
+}
 
+
+/**
+ * Process ticket from database
+ *
+ * @param cls struct TicketIterationProcResult
+ * @param ticket the ticket
+ * @param attrs the attributes
+ */
+static void
+ticket_reissue_proc (void *cls,
+                     const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket,
+                     const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs);
+
+static void
+revocation_reissue_tickets (struct TicketRevocationHandle *rh);
+
+
+static void reissue_next (void *cls)
+{
+  struct TicketRevocationHandle *rh = cls;
+  revocation_reissue_tickets (rh);
+}
+
+
+static void
+reissue_ticket_cont (void *cls,
+                     int32_t success,
+                     const char *emsg)
+{
+  struct TicketRevocationHandle *rh = cls;
+
+  rh->ns_qe = NULL;
+  if (GNUNET_SYSERR == success)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
+                "Unknown Error\n");
+    send_revocation_finished (rh, GNUNET_SYSERR);
+    cleanup_revoke_ticket_handle (rh);
+    return;
+  }
+  rh->offset++;
+  GNUNET_SCHEDULER_add_now (&reissue_next, rh);
 }
 
+
 /**
- * Build an ABE key and store it
+ * Process ticket from database
  *
- * @param cls the IssueHandle
+ * @param cls struct TicketIterationProcResult
+ * @param ticket the ticket
+ * @param attrs the attributes
  */
 static void
-issue_ticket (void *cls)
+ticket_reissue_proc (void *cls,
+                     const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket,
+                     const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs)
 {
-  struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
+  struct TicketRevocationHandle *rh = cls;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *le;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *le_rollover;
   struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe_privkey;
-  struct IssueHandle *handle = cls;
   struct GNUNET_GNSRECORD_Data code_record[1];
-  struct GNUNET_CRYPTO_AbeKey *rp_key;
-  char *nonce_str;
+  struct GNUNET_ABE_AbeKey *rp_key;
   char *code_record_data;
-  char **attrs;
-  char *scope;
-  char *scopes_tmp;
+  char **attr_arr;
+  char *label;
+  char *policy;
   int attrs_len;
-  int i;
-  uint64_t time;
-  uint64_t exp_time;
+  uint32_t i;
+  int reissue_ticket;
   size_t code_record_len;
 
-  //Remote nonce
-  nonce_str = NULL;
-  GNUNET_asprintf (&nonce_str, "%lu", handle->nonce);
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Request nonce: %s\n", nonce_str);
 
-  GNUNET_CRYPTO_ecdsa_key_get_public (&handle->iss_key,
-                                      &pub_key);
-  handle->ticket = ticket_create (handle->nonce,
-                                  &pub_key,
-                                  handle->label,
-                                  &handle->aud_key);
+  if (NULL == ticket)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Iteration done\n");
+    return;
+  }
+
+  if (0 == memcmp (&ticket->audience,
+                   &rh->ticket.audience,
+                   sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Do not reissue for this identity.!\n");
+
+    rh->offset++;
+    GNUNET_SCHEDULER_add_now (&reissue_next, rh);
+    return;
+  }
+
+  /* 
+   * Check if any attribute of this ticket intersects with a rollover attribute
+   */
+  reissue_ticket = GNUNET_NO;
+  for (le = attrs->list_head; NULL != le; le = le->next)
+  {
+    for (le_rollover = rh->rvk_attrs->list_head;
+         NULL != le_rollover;
+         le_rollover = le_rollover->next)
+    {
+      if (0 == strcmp (le_rollover->claim->name,
+                       le->claim->name))
+      {
+        reissue_ticket = GNUNET_YES;
+        le->claim->version = le_rollover->claim->version;
+      }
+    }
+  }
+
+  if (GNUNET_NO == reissue_ticket)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Skipping ticket.\n");
+
+    rh->offset++;
+    GNUNET_SCHEDULER_add_now (&reissue_next, rh);
 
-  time = GNUNET_TIME_absolute_get().abs_value_us;
-  exp_time = time + token_expiration_interval.rel_value_us;
 
-  token_add_attr_int (handle->token, "nbf", time);
-  token_add_attr_int (handle->token, "iat", time);
-  token_add_attr_int (handle->token, "exp", exp_time);
-  token_add_attr (handle->token, "nonce", nonce_str);
+    return;
+  }
 
   //Create new ABE key for RP
-  attrs_len = (GNUNET_CONTAINER_multihashmap_size (handle->attr_map) + 1) * sizeof (char*);
-  attrs = GNUNET_malloc (attrs_len);
+  attrs_len = 0;
+
+  /* If this is the RP we want to revoke attributes of, the do so */
+
+  for (le = attrs->list_head; NULL != le; le = le->next)
+    attrs_len++;
+  attr_arr = GNUNET_malloc ((attrs_len + 1)*sizeof (char*));
   i = 0;
-  scopes_tmp = GNUNET_strdup (handle->scopes);
-  for (scope = strtok (scopes_tmp, ","); NULL != scope; scope = strtok (NULL, ",")) {
-    attrs[i] = scope;
+  for (le = attrs->list_head; NULL != le; le = le->next) {
+    GNUNET_asprintf (&policy, "%s_%lu",
+                     le->claim->name,
+                     le->claim->version);
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Recreating key with %s\n", policy);
+    attr_arr[i] = policy;
     i++;
   }
-  rp_key = GNUNET_CRYPTO_cpabe_create_key (handle->abe_key,
-                                           attrs);
-  code_record_len = serialize_abe_keyinfo (handle,
-                                           rp_key,
-                                           &ecdhe_privkey,
-                                           &code_record_data);
+  attr_arr[i] = NULL;
+  rp_key = GNUNET_ABE_cpabe_create_key (rh->abe_key,
+                                           attr_arr);
+
+  //TODO review this wireformat
+  code_record_len = serialize_abe_keyinfo2 (ticket,
+                                            attrs,
+                                            rp_key,
+                                            &ecdhe_privkey,
+                                            &code_record_data);
   code_record[0].data = code_record_data;
   code_record[0].data_size = code_record_len;
-  code_record[0].expiration_time = exp_time;
+  code_record[0].expiration_time = GNUNET_TIME_UNIT_DAYS.rel_value_us;
   code_record[0].record_type = GNUNET_GNSRECORD_TYPE_ABE_KEY;
-  code_record[0].flags = GNUNET_GNSRECORD_RF_NONE;
-
+  code_record[0].flags = GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION;
 
+  label = GNUNET_STRINGS_data_to_string_alloc (&ticket->rnd,
+                                               sizeof (uint64_t));
   //Publish record
-  handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
-                                                  &handle->iss_key,
-                                                  handle->label,
-                                                  1,
-                                                  code_record,
-                                                  &store_record_issue_cont,
-                                                  handle);
+  rh->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
+                                              &rh->identity,
+                                              label,
+                                              1,
+                                              code_record,
+                                              &reissue_ticket_cont,
+                                              rh);
+  //for (; i > 0; i--)
+  //  GNUNET_free (attr_arr[i-1]);
   GNUNET_free (ecdhe_privkey);
-  GNUNET_free (nonce_str);
+  GNUNET_free (label);
+  GNUNET_free (attr_arr);
   GNUNET_free (code_record_data);
+  GNUNET_ABE_cpabe_delete_key (rp_key, GNUNET_YES);
 }
 
-/**
- * Credential to JSON
- * @param cred the credential
- * @return the resulting json, NULL if failed
- */
-static json_t*
-credential_to_json (struct GNUNET_CREDENTIAL_Credential *cred)
-{
-  char *issuer;
-  char *subject;
-  char *signature;
-  char attribute[cred->issuer_attribute_len + 1];
-  json_t *cred_obj;
 
-  issuer = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->issuer_key);
-  if (NULL == issuer)
+/* Prototype for below function */
+static void
+attr_reenc_cont (void *cls,
+                 int32_t success,
+                 const char *emsg);
+
+static void
+revocation_reissue_tickets (struct TicketRevocationHandle *rh)
+{
+  int ret;
+  /* Done, issue new keys */
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Revocation Phase III: Reissuing Tickets\n");
+  if (GNUNET_SYSERR == (ret = TKT_database->iterate_tickets (TKT_database->cls,
+                                                             &rh->ticket.identity,
+                                                             GNUNET_NO,
+                                                             rh->offset,
+                                                             &ticket_reissue_proc,
+                                                             rh)))
   {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Issuer in credential malformed\n");
-    return NULL;
-  }  
-  subject = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->subject_key);
-  if (NULL == subject)
+    GNUNET_break (0);
+  }
+  if (GNUNET_NO == ret)
   {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Subject in credential malformed\n");
-    GNUNET_free (issuer);
-    return NULL;
+    send_revocation_finished (rh, GNUNET_OK);
+    cleanup_revoke_ticket_handle (rh);
+    return;
   }
-  GNUNET_STRINGS_base64_encode ((char*)&cred->signature,
-                                sizeof (struct GNUNET_CRYPTO_EcdsaSignature),
-                                &signature);
-  memcpy (attribute,
-          cred->issuer_attribute,
-          cred->issuer_attribute_len);
-  attribute[cred->issuer_attribute_len] = '\0';
-  cred_obj = json_object ();
-  json_object_set_new (cred_obj, "issuer", json_string (issuer));
-  json_object_set_new (cred_obj, "subject", json_string (subject));
-  json_object_set_new (cred_obj, "attribute", json_string (attribute));
-  json_object_set_new (cred_obj, "signature", json_string (signature));
-  json_object_set_new (cred_obj, "expiration", json_integer (cred->expiration.abs_value_us));
-  GNUNET_free (issuer);
-  GNUNET_free (subject);
-  GNUNET_free (signature);
-  return cred_obj;
 }
 
-
+/**
+ * Revoke next attribte by reencryption with
+ * new ABE master
+ */
 static void
-handle_vattr_collection (void* cls,
-                         unsigned int d_count,
-                         struct GNUNET_CREDENTIAL_Delegation *dc,
-                         unsigned int c_count,
-                         struct GNUNET_CREDENTIAL_Credential *cred)
-{
-  struct IssueHandle *handle = cls;
-  struct VerifiedAttributeEntry *vattr;
-  json_t *cred_json;
-  json_t *cred_array;
-  int i;
-  handle->credential_request = NULL;
-
-  if (NULL == cred)
+reenc_next_attribute (struct TicketRevocationHandle *rh)
+{
+  struct GNUNET_GNSRECORD_Data rd[1];
+  char* buf;
+  char* enc_buf;
+  size_t enc_size;
+  char* rd_buf;
+  size_t buf_size;
+  char* policy;
+  uint32_t attr_ver;
+
+  if (NULL == rh->attrs->list_head)
   {
-    GNUNET_SCHEDULER_add_now (&issue_ticket, handle);
+    revocation_reissue_tickets (rh);
     return;
   }
-  cred_array = json_array();
-  for (i=0;i<c_count;i++)
-  {
-    cred_json = credential_to_json (cred);
-    if (NULL == cred_json)
-      continue;
-    json_array_append (cred_array, cred_json);
-    token_add_attr_json (handle->token,
-                         handle->v_attr_head->name,
-                         cred_array);
-  }
-  json_decref (cred_array);
-  vattr = handle->v_attr_head;
+  buf_size = GNUNET_IDENTITY_ATTRIBUTE_serialize_get_size (rh->attrs->list_head->claim);
+  buf = GNUNET_malloc (buf_size);
+  GNUNET_IDENTITY_ATTRIBUTE_serialize (rh->attrs->list_head->claim,
+                       buf);
+  rh->attrs->list_head->claim->version++;
+  GNUNET_asprintf (&policy, "%s_%lu",
+                   rh->attrs->list_head->claim->name,
+                   rh->attrs->list_head->claim->version);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Encrypting with policy %s\n", policy);
+  /**
+   * Encrypt the attribute value and store in namestore
+   */
+  enc_size = GNUNET_ABE_cpabe_encrypt (buf,
+                                          buf_size,
+                                          policy, //Policy
+                                          rh->abe_key,
+                                          (void**)&enc_buf);
+  GNUNET_free (buf);
+  GNUNET_free (policy);
+  rd[0].data_size = enc_size + sizeof (uint32_t);
+  rd_buf = GNUNET_malloc (rd[0].data_size);
+  attr_ver = htonl (rh->attrs->list_head->claim->version);
+  GNUNET_memcpy (rd_buf,
+                 &attr_ver,
+                 sizeof (uint32_t));
+  GNUNET_memcpy (rd_buf+sizeof (uint32_t),
+                 enc_buf,
+                 enc_size);
+  rd[0].data = rd_buf;
+  rd[0].record_type = GNUNET_GNSRECORD_TYPE_ID_ATTR;
+  rd[0].flags = GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION;
+  rd[0].expiration_time = GNUNET_TIME_UNIT_HOURS.rel_value_us; //TODO sane?
+  rh->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
+                                              &rh->identity,
+                                              rh->attrs->list_head->claim->name,
+                                              1,
+                                              rd,
+                                              &attr_reenc_cont,
+                                              rh);
+  GNUNET_free (enc_buf);
+  GNUNET_free (rd_buf);
+}
 
-  GNUNET_CONTAINER_DLL_remove (handle->v_attr_head,
-                               handle->v_attr_tail,
-                               vattr);
-  GNUNET_free (vattr->name);
-  GNUNET_free (vattr);
+/**
+ * Namestore callback after revoked attribute
+ * is stored
+ */
+static void
+attr_reenc_cont (void *cls,
+                 int32_t success,
+                 const char *emsg)
+{
+  struct TicketRevocationHandle *rh = cls;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *le;
 
-  if (NULL == handle->v_attr_head)
+  if (GNUNET_SYSERR == success)
   {
-    GNUNET_SCHEDULER_add_now (&issue_ticket, handle);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to reencrypt attribute %s\n",
+                emsg);
+    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
     return;
   }
-  handle->credential_request = GNUNET_CREDENTIAL_collect (credential_handle,
-                                                          &handle->aud_key,
-                                                          handle->v_attr_head->name,
-                                                          &handle->iss_key,
-                                                          &handle_vattr_collection,
-                                                          handle);
+  if (NULL == rh->attrs->list_head)
+  {
+    revocation_reissue_tickets (rh);
+    return;
+  }
+  le = rh->attrs->list_head;
+  GNUNET_CONTAINER_DLL_remove (rh->attrs->list_head,
+                               rh->attrs->list_tail,
+                               le);
+  GNUNET_assert (NULL != rh->rvk_attrs);
+  GNUNET_CONTAINER_DLL_insert (rh->rvk_attrs->list_head,
+                               rh->rvk_attrs->list_tail,
+                               le);
+
 
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Re-encrypting next attribute\n");
+  reenc_next_attribute (rh);
 }
 
 
 static void
-attr_collect_error (void *cls)
+process_attributes_to_update (void *cls,
+                              const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket,
+                              const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs)
 {
-  struct IssueHandle *handle = cls;
+  struct TicketRevocationHandle *rh = cls;
+
+  rh->attrs = GNUNET_IDENTITY_ATTRIBUTE_list_dup (attrs);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Revocation Phase I: Collecting attributes\n");
+  /* Reencrypt all attributes with new key */
+  if (NULL == rh->attrs->list_head)
+  {
+    /* No attributes to reencrypt */
+    send_revocation_finished (rh, GNUNET_OK);
+    cleanup_revoke_ticket_handle (rh);
+    return;
+  } else {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Revocation Phase II: Re-encrypting attributes\n");
+    reenc_next_attribute (rh);
+  }
 
-  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Adding attribute Error!\n");
-  handle->ns_it = NULL;
-  GNUNET_SCHEDULER_add_now (&issue_ticket, handle);
 }
 
 
+
 static void
-attr_collect_finished (void *cls)
+get_ticket_after_abe_bootstrap (void *cls,
+                                struct GNUNET_ABE_AbeMasterKey *abe_key)
 {
-  struct IssueHandle *handle = cls;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Finished ABE bootstrap\n");
+  struct TicketRevocationHandle *rh = cls;
+  rh->abe_key = abe_key;
+  TKT_database->get_ticket_attributes (TKT_database->cls,
+                                       &rh->ticket,
+                                       &process_attributes_to_update,
+                                       rh);
+}
 
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding attribute END: \n");
-  handle->ns_it = NULL;
+static int
+check_revoke_ticket_message(void *cls,
+                            const struct RevokeTicketMessage *im)
+{
+  uint16_t size;
 
-  if (NULL == handle->v_attr_head)
+  size = ntohs (im->header.size);
+  if (size <= sizeof (struct RevokeTicketMessage))
   {
-    GNUNET_SCHEDULER_add_now (&issue_ticket, handle);
-    return;
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
   }
-  handle->credential_request = GNUNET_CREDENTIAL_collect (credential_handle,
-                                                          &handle->aud_key,
-                                                          handle->v_attr_head->name,
-                                                          &handle->iss_key,
-                                                          &handle_vattr_collection,
-                                                          handle);
+  return GNUNET_OK;
 }
-/**
- * Collect attributes for token
- */
+
 static void
-attr_collect (void *cls,
-              const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
-              const char *label,
-              unsigned int rd_count,
-              const struct GNUNET_GNSRECORD_Data *rd)
+handle_revoke_ticket_message (void *cls,
+                              const struct RevokeTicketMessage *rm)
 {
-  struct IssueHandle *handle = cls;
-  int i;
-  char* data;
-  struct GNUNET_HashCode key;
-
-  GNUNET_CRYPTO_hash (label,
-                      strlen (label),
-                      &key);
-
-  if (0 == rd_count ||
-      ( (NULL != handle->attr_map) &&
-        (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains (handle->attr_map,
-                                                               &key))
-      )
-     )
-  {
-    GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
-    return;
-  }
+  struct TicketRevocationHandle *rh;
+  struct IdpClient *idp = cls;
+  struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket;
+
+  rh = GNUNET_new (struct TicketRevocationHandle);
+  ticket = (struct GNUNET_IDENTITY_PROVIDER_Ticket*)&rm[1];
+  rh->rvk_attrs = GNUNET_new (struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList);
+  rh->ticket = *ticket;
+  rh->r_id = ntohl (rm->id);
+  rh->client = idp;
+  rh->identity = rm->identity;
+  GNUNET_CRYPTO_ecdsa_key_get_public (&rh->identity,
+                                      &rh->ticket.identity);
+  GNUNET_CONTAINER_DLL_insert (idp->revocation_list_head,
+                               idp->revocation_list_tail,
+                               rh);
+  bootstrap_abe (&rh->identity, &get_ticket_after_abe_bootstrap, rh, GNUNET_NO);
+  GNUNET_SERVICE_client_continue (idp->client);
 
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding attribute: %s\n", label);
+}
 
-  if (1 == rd_count)
-  {
-    if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
-    {
-      data = GNUNET_GNSRECORD_value_to_string (rd->record_type,
-                                               rd->data,
-                                               rd->data_size);
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding value: %s\n", data);
-      token_add_attr (handle->token,
-                      label,
-                      data);
-      GNUNET_free (data);
-    }
-    GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
-    return;
-  }
 
-  i = 0;
-  for (; i < rd_count; i++)
+static void
+cleanup_consume_ticket_handle (struct ConsumeTicketHandle *handle)
+{
+  if (NULL != handle->key)
+    GNUNET_ABE_cpabe_delete_key (handle->key,
+                                    GNUNET_YES);
+  if (NULL != handle->attrs)
+    GNUNET_IDENTITY_ATTRIBUTE_list_destroy (handle->attrs);
+  GNUNET_free (handle);
+}
+
+
+
+static int
+check_consume_ticket_message(void *cls,
+                             const struct ConsumeTicketMessage *cm)
+{
+  uint16_t size;
+
+  size = ntohs (cm->header.size);
+  if (size <= sizeof (struct ConsumeTicketMessage))
   {
-    if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
-    {
-      data = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
-                                               rd[i].data,
-                                               rd[i].data_size);
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding value: %s\n", data);
-      token_add_attr (handle->token, label, data);
-      GNUNET_free (data);
-    }
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
   }
-
-  GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
+  return GNUNET_OK;
 }
 
 static void
-process_parallel_lookup (void *cls, uint32_t rd_count,
-                         const struct GNUNET_GNSRECORD_Data *rd)
+process_parallel_lookup2 (void *cls, uint32_t rd_count,
+                          const struct GNUNET_GNSRECORD_Data *rd)
 {
-  GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Parallel lookup finished (count=%u)\n", rd_count);
   struct ParallelLookup *parallel_lookup = cls;
-  struct ExchangeHandle *handle = parallel_lookup->handle;
+  struct ConsumeTicketHandle *handle = parallel_lookup->handle;
+  struct ConsumeTicketResultMessage *crm;
+  struct GNUNET_MQ_Envelope *env;
+  struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry *attr_le;
+  struct GNUNET_TIME_Absolute decrypt_duration;
   char *data;
-  int i;
+  char *data_tmp;
+  ssize_t attr_len;
+  size_t attrs_len;
 
   GNUNET_CONTAINER_DLL_remove (handle->parallel_lookups_head,
                                handle->parallel_lookups_tail,
                                parallel_lookup);
+  GNUNET_free (parallel_lookup->label);
+
+  GNUNET_STATISTICS_update (stats,
+                            "attribute_lookup_time_total",
+                            GNUNET_TIME_absolute_get_duration (parallel_lookup->lookup_start_time).rel_value_us,
+                            GNUNET_YES);
+  GNUNET_STATISTICS_update (stats,
+                            "attribute_lookups_count",
+                            1,
+                            GNUNET_YES);
+
+
   GNUNET_free (parallel_lookup);
-  if (1 == rd_count)
+  if (1 != rd_count)
+    GNUNET_break(0);//TODO
+  if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
   {
-    if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
+    decrypt_duration = GNUNET_TIME_absolute_get ();
+    attr_len = GNUNET_ABE_cpabe_decrypt (rd->data + sizeof (uint32_t),
+                                            rd->data_size - sizeof (uint32_t),
+                                            handle->key,
+                                            (void**)&data);
+    if (GNUNET_SYSERR != attr_len) 
     {
-      GNUNET_CRYPTO_cpabe_decrypt (rd->data,
-                                   rd->data_size,
-                                   handle->key,
-                                   (void**)&data);
-      GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, "Adding value: %s\n", data);
-      token_add_attr (handle->token,
-                      parallel_lookup->label,
-                      data);
+      GNUNET_STATISTICS_update (stats,
+                                "abe_decrypt_time_total",
+                                GNUNET_TIME_absolute_get_duration (decrypt_duration).rel_value_us,
+                                GNUNET_YES);
+      GNUNET_STATISTICS_update (stats,
+                                "abe_decrypt_count",
+                                1,
+                                GNUNET_YES);
+
+      attr_le = GNUNET_new (struct GNUNET_IDENTITY_ATTRIBUTE_ClaimListEntry);
+      attr_le->claim = GNUNET_IDENTITY_ATTRIBUTE_deserialize (data,
+                                                  attr_len);
+      attr_le->claim->version = ntohl(*(uint32_t*)rd->data);
+      GNUNET_CONTAINER_DLL_insert (handle->attrs->list_head,
+                                   handle->attrs->list_tail,
+                                   attr_le);
       GNUNET_free (data);
     }
-  } else {
-    i = 0;
-    for (; i < rd_count; i++)
-    {
-      if (rd[i].record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
-      {
-        data = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
-                                                 rd[i].data,
-                                                 rd[i].data_size);
-        GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, "Adding value: %s\n", data);
-        token_add_attr (handle->token, parallel_lookup->label, data);
-        GNUNET_free (data);
-      }
-    }
   }
   if (NULL != handle->parallel_lookups_head)
     return; //Wait for more
-  //Else we are done
+  /* Else we are done */
+
+  /* Store ticket in DB */
+  if (GNUNET_OK != TKT_database->store_ticket (TKT_database->cls,
+                                               &handle->ticket,
+                                               handle->attrs))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unable to store ticket after consume\n");
+    GNUNET_break (0);
+  }
+
   GNUNET_SCHEDULER_cancel (handle->kill_task);
-  GNUNET_SCHEDULER_add_now (&sign_and_return_token, handle);
+  attrs_len = GNUNET_IDENTITY_ATTRIBUTE_list_serialize_get_size (handle->attrs);
+  env = GNUNET_MQ_msg_extra (crm,
+                             attrs_len,
+                             GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_CONSUME_TICKET_RESULT);
+  crm->id = htonl (handle->r_id);
+  crm->attrs_len = htons (attrs_len);
+  crm->identity = handle->ticket.identity;
+  data_tmp = (char *) &crm[1];
+  GNUNET_IDENTITY_ATTRIBUTE_list_serialize (handle->attrs,
+                            data_tmp);
+  GNUNET_MQ_send (handle->client->mq, env);
+  cleanup_consume_ticket_handle (handle);
 }
 
 void
-abort_parallel_lookups (void *cls)
+abort_parallel_lookups2 (void *cls)
 {
-  struct ExchangeHandle *handle = cls;
+  struct ConsumeTicketHandle *handle = cls;
   struct ParallelLookup *lu;
   struct ParallelLookup *tmp;
+  struct AttributeResultMessage *arm;
+  struct GNUNET_MQ_Envelope *env;
 
   for (lu = handle->parallel_lookups_head;
        NULL != lu;) {
@@ -965,18 +1633,23 @@ abort_parallel_lookups (void *cls)
     GNUNET_CONTAINER_DLL_remove (handle->parallel_lookups_head,
                                  handle->parallel_lookups_tail,
                                  lu);
-      GNUNET_free (lu);
-      lu = tmp;
+    GNUNET_free (lu);
+    lu = tmp;
   }
-  GNUNET_SCHEDULER_add_now (&sign_and_return_token, handle);
+  env = GNUNET_MQ_msg (arm,
+                       GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_RESULT);
+  arm->id = htonl (handle->r_id);
+  arm->attr_len = htons (0);
+  GNUNET_MQ_send (handle->client->mq, env);
 
 }
 
+
 static void
-process_lookup_result (void *cls, uint32_t rd_count,
-                       const struct GNUNET_GNSRECORD_Data *rd)
+process_consume_abe_key (void *cls, uint32_t rd_count,
+                         const struct GNUNET_GNSRECORD_Data *rd)
 {
-  struct ExchangeHandle *handle = cls;
+  struct ConsumeTicketHandle *handle = cls;
   struct GNUNET_HashCode new_key_hash;
   struct GNUNET_CRYPTO_SymmetricSessionKey enc_key;
   struct GNUNET_CRYPTO_SymmetricInitializationVector enc_iv;
@@ -993,7 +1666,7 @@ process_lookup_result (void *cls, uint32_t rd_count,
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Number of keys %d != 1.",
                 rd_count);
-    cleanup_exchange_handle (handle);
+    cleanup_consume_ticket_handle (handle);
     GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
     return;
   }
@@ -1005,7 +1678,7 @@ process_lookup_result (void *cls, uint32_t rd_count,
 
   //Calculate symmetric key from ecdh parameters
   GNUNET_assert (GNUNET_OK == 
-                 GNUNET_CRYPTO_ecdsa_ecdh (&handle->aud_privkey,
+                 GNUNET_CRYPTO_ecdsa_ecdh (&handle->identity,
                                            ecdh_key,
                                            &new_key_hash));
   create_sym_key_from_ecdh (&new_key_hash,
@@ -1020,322 +1693,674 @@ process_lookup_result (void *cls, uint32_t rd_count,
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Decrypted bytes: %zd Expected bytes: %zd\n",
               size, rd->data_size - sizeof (struct GNUNET_CRYPTO_EcdhePublicKey));
-
+  GNUNET_STATISTICS_update (stats,
+                            "abe_key_lookup_time_total",
+                            GNUNET_TIME_absolute_get_duration (handle->lookup_start_time).rel_value_us,
+                            GNUNET_YES);
+  GNUNET_STATISTICS_update (stats,
+                            "abe_key_lookups_count",
+                            1,
+                            GNUNET_YES);
   scopes = GNUNET_strdup (buf);
-  GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Scopes %s\n", scopes);
-  handle->key = GNUNET_CRYPTO_cpabe_deserialize_key ((void*)(buf + strlen (scopes) + 1),
-                                         rd->data_size - sizeof (struct GNUNET_CRYPTO_EcdhePublicKey)
-                                         - strlen (scopes) - 1);
+  handle->key = GNUNET_ABE_cpabe_deserialize_key ((void*)(buf + strlen (scopes) + 1),
+                                                     rd->data_size - sizeof (struct GNUNET_CRYPTO_EcdhePublicKey)
+                                                     - strlen (scopes) - 1);
 
   for (scope = strtok (scopes, ","); NULL != scope; scope = strtok (NULL, ","))
   {
     GNUNET_asprintf (&lookup_query,
                      "%s.gnu",
                      scope);
-    GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                 "Looking up %s\n", lookup_query);
     parallel_lookup = GNUNET_new (struct ParallelLookup);
     parallel_lookup->handle = handle;
     parallel_lookup->label = GNUNET_strdup (scope);
+    parallel_lookup->lookup_start_time = GNUNET_TIME_absolute_get();
     parallel_lookup->lookup_request
       = GNUNET_GNS_lookup (gns_handle,
                            lookup_query,
-                           &handle->ticket->payload->identity_key,
+                           &handle->ticket.identity,
                            GNUNET_GNSRECORD_TYPE_ID_ATTR,
-                           GNUNET_GNS_LO_LOCAL_MASTER,
-                           &process_parallel_lookup,
+                           GNUNET_GNS_LO_DEFAULT,
+                           &process_parallel_lookup2,
                            parallel_lookup);
     GNUNET_CONTAINER_DLL_insert (handle->parallel_lookups_head,
                                  handle->parallel_lookups_tail,
                                  parallel_lookup);
+    GNUNET_free (lookup_query);
   }
+  GNUNET_free (scopes);
+  GNUNET_free (buf);
   handle->kill_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES,3),
-                                &abort_parallel_lookups,
-                                handle);
+                                                    &abort_parallel_lookups2,
+                                                    handle);
 }
 
-/**
- * Checks a exchange message
- *
- * @param cls client sending the message
- * @param xm message of type `struct ExchangeMessage`
- * @return #GNUNET_OK if @a xm is well-formed
- */
-static int
-check_exchange_message (void *cls,
-                        const struct ExchangeMessage *xm)
+
+static void
+handle_consume_ticket_message (void *cls,
+                               const struct ConsumeTicketMessage *cm)
 {
-  uint16_t size;
+  struct ConsumeTicketHandle *ch;
+  struct IdpClient *idp = cls;
+  char* lookup_query;
+  char* rnd_label;
+
+  ch = GNUNET_new (struct ConsumeTicketHandle);
+  ch->r_id = ntohl (cm->id);
+  ch->client = idp;
+  ch->identity = cm->identity;
+  ch->attrs = GNUNET_new (struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList);
+  GNUNET_CRYPTO_ecdsa_key_get_public (&ch->identity,
+                                      &ch->identity_pub);
+  ch->ticket = *((struct GNUNET_IDENTITY_PROVIDER_Ticket*)&cm[1]);
+  rnd_label = GNUNET_STRINGS_data_to_string_alloc (&ch->ticket.rnd,
+                                                   sizeof (uint64_t));
+  GNUNET_asprintf (&lookup_query,
+                   "%s.gnu",
+                   rnd_label);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Looking for ABE key under %s\n", lookup_query);
+  ch->lookup_start_time = GNUNET_TIME_absolute_get ();
+  ch->lookup_request
+    = GNUNET_GNS_lookup (gns_handle,
+                         lookup_query,
+                         &ch->ticket.identity,
+                         GNUNET_GNSRECORD_TYPE_ABE_KEY,
+                         GNUNET_GNS_LO_DEFAULT,
+                         &process_consume_abe_key,
+                         ch);
+  GNUNET_free (rnd_label);
+  GNUNET_free (lookup_query);
+  GNUNET_SERVICE_client_continue (idp->client);
+}
 
-  size = ntohs (xm->header.size);
-  if (size <= sizeof (struct ExchangeMessage))
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
+static void
+cleanup_as_handle (struct AttributeStoreHandle *handle)
+{
+  if (NULL != handle->claim)
+    GNUNET_free (handle->claim);
+  if (NULL != handle->abe_key)
+    GNUNET_ABE_cpabe_delete_master_key (handle->abe_key);
+  GNUNET_free (handle);
 }
 
-/**
- *
- * Handler for exchange message
- *
- * @param cls unused
- * @param client who sent the message
- * @param message the message
- */
 static void
-handle_exchange_message (void *cls,
-                         const struct ExchangeMessage *xm)
+attr_store_cont (void *cls,
+                 int32_t success,
+                 const char *emsg)
 {
-  struct ExchangeHandle *xchange_handle;
-  struct GNUNET_SERVICE_Client *client = cls;
-  const char *ticket;
-  char *lookup_query;
+  struct AttributeStoreHandle *as_handle = cls;
+  struct GNUNET_MQ_Envelope *env;
+  struct AttributeStoreResultMessage *acr_msg;
 
-  ticket = (const char *) &xm[1];
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-              "Received EXCHANGE of `%s' from client\n",
-              ticket);
-  xchange_handle = GNUNET_malloc (sizeof (struct ExchangeHandle));
-  xchange_handle->aud_privkey = xm->aud_privkey;
-  xchange_handle->r_id = xm->id;
-  if (GNUNET_SYSERR == ticket_parse (ticket,
-                                     &xchange_handle->aud_privkey,
-                                     &xchange_handle->ticket))
+  if (GNUNET_SYSERR == success)
   {
-    GNUNET_free (xchange_handle);
-    GNUNET_SERVICE_client_drop (client);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Failed to store attribute %s\n",
+                emsg);
+    cleanup_as_handle (as_handle);
+    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
     return;
   }
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking for ABE key under %s\n",
-              xchange_handle->ticket->payload->label);
-  GNUNET_asprintf (&lookup_query,
-                   "%s.gnu",
-                   xchange_handle->ticket->payload->label);
-  GNUNET_SERVICE_client_continue (client);
-  xchange_handle->client = client;
-  xchange_handle->token = token_create (&xchange_handle->ticket->payload->identity_key,
-                                        &xchange_handle->ticket->payload->identity_key);
-  xchange_handle->lookup_request
-    = GNUNET_GNS_lookup (gns_handle,
-                         lookup_query,
-                         &xchange_handle->ticket->payload->identity_key,
-                         GNUNET_GNSRECORD_TYPE_ABE_KEY,
-                         GNUNET_GNS_LO_LOCAL_MASTER,
-                         &process_lookup_result,
-                         xchange_handle);
-  GNUNET_free (lookup_query);
 
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Sending ATTRIBUTE_STORE_RESPONSE message\n");
+  env = GNUNET_MQ_msg (acr_msg,
+                       GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_STORE_RESPONSE);
+  acr_msg->id = htonl (as_handle->r_id);
+  acr_msg->op_result = htonl (GNUNET_OK);
+  GNUNET_MQ_send (as_handle->client->mq,
+                  env);
+  cleanup_as_handle (as_handle);
+}
+
+static void
+attr_store_task (void *cls)
+{
+  struct AttributeStoreHandle *as_handle = cls;
+  struct GNUNET_GNSRECORD_Data rd[1];
+  char* buf;
+  char* policy;
+  char* enc_buf;
+  char* rd_buf;
+  size_t enc_size;
+  size_t buf_size;
+  uint32_t attr_ver;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Storing attribute\n");
+  buf_size = GNUNET_IDENTITY_ATTRIBUTE_serialize_get_size (as_handle->claim);
+  buf = GNUNET_malloc (buf_size);
+
+  GNUNET_IDENTITY_ATTRIBUTE_serialize (as_handle->claim,
+                       buf);
+
+  GNUNET_asprintf (&policy,
+                   "%s_%lu",
+                   as_handle->claim->name,
+                   as_handle->claim->version);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Encrypting with policy %s\n", policy);
+  /**
+   * Encrypt the attribute value and store in namestore
+   */
+  enc_size = GNUNET_ABE_cpabe_encrypt (buf,
+                                          buf_size,
+                                          policy, //Policy
+                                          as_handle->abe_key,
+                                          (void**)&enc_buf);
+  GNUNET_free (buf);
+  GNUNET_free (policy);
+  rd[0].data_size = enc_size + sizeof (uint32_t);
+  rd_buf = GNUNET_malloc (rd[0].data_size);
+  attr_ver = htonl (as_handle->claim->version);
+  GNUNET_memcpy (rd_buf,
+                 &attr_ver,
+                 sizeof (uint32_t));
+  GNUNET_memcpy (rd_buf+sizeof (uint32_t),
+                 enc_buf,
+                 enc_size);
+  rd[0].data = rd_buf;
+  rd[0].record_type = GNUNET_GNSRECORD_TYPE_ID_ATTR;
+  rd[0].flags = GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION;
+  rd[0].expiration_time = GNUNET_TIME_UNIT_HOURS.rel_value_us; //TODO sane?
+  as_handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
+                                                     &as_handle->identity,
+                                                     as_handle->claim->name,
+                                                     1,
+                                                     rd,
+                                                     &attr_store_cont,
+                                                     as_handle);
+  GNUNET_free (enc_buf);
+  GNUNET_free (rd_buf);
+}
+
+
+static void
+store_after_abe_bootstrap (void *cls,
+                           struct GNUNET_ABE_AbeMasterKey *abe_key)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Finished ABE bootstrap\n");
+  struct AttributeStoreHandle *ash = cls;
+  ash->abe_key = abe_key;
+  GNUNET_SCHEDULER_add_now (&attr_store_task, ash);
 }
 
-/**
- * Checks an issue message
- *
- * @param cls client sending the message
- * @param im message of type `struct IssueMessage`
- * @return #GNUNET_OK if @a im is well-formed
- */
 static int
-check_issue_message(void *cls,
-                    const struct IssueMessage *im)
+check_attribute_store_message(void *cls,
+                              const struct AttributeStoreMessage *sam)
 {
   uint16_t size;
 
-  size = ntohs (im->header.size);
-  if (size <= sizeof (struct IssueMessage))
+  size = ntohs (sam->header.size);
+  if (size <= sizeof (struct AttributeStoreMessage))
   {
     GNUNET_break (0);
     return GNUNET_SYSERR;
   }
-  scopes = (char *) &im[1];
-  if ('\0' != scopes[size - sizeof (struct IssueMessage) - 1])
+  return GNUNET_OK;
+}
+
+
+static void
+handle_attribute_store_message (void *cls,
+                                const struct AttributeStoreMessage *sam)
+{
+  struct AttributeStoreHandle *as_handle;
+  struct IdpClient *idp = cls;
+  size_t data_len;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received ATTRIBUTE_STORE message\n");
+
+  data_len = ntohs (sam->attr_len);
+
+  as_handle = GNUNET_new (struct AttributeStoreHandle);
+  as_handle->claim = GNUNET_IDENTITY_ATTRIBUTE_deserialize ((char*)&sam[1],
+                                                data_len);
+
+  as_handle->r_id = ntohl (sam->id);
+  as_handle->identity = sam->identity;
+  GNUNET_CRYPTO_ecdsa_key_get_public (&sam->identity,
+                                      &as_handle->identity_pkey);
+
+  GNUNET_SERVICE_client_continue (idp->client);
+  as_handle->client = idp;
+  bootstrap_abe (&as_handle->identity, &store_after_abe_bootstrap, as_handle, GNUNET_NO);
+}
+
+static void
+cleanup_iter_handle (struct AttributeIterator *ai)
+{
+  if (NULL != ai->abe_key)
+    GNUNET_ABE_cpabe_delete_master_key (ai->abe_key);
+  GNUNET_CONTAINER_DLL_remove (ai->client->op_head,
+                               ai->client->op_tail,
+                               ai);
+  GNUNET_free (ai);
+}
+
+static void
+attr_iter_error (void *cls)
+{
+  struct AttributeIterator *ai = cls;
+  //TODO
+  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+              "Failed to iterate over attributes\n");
+  cleanup_iter_handle (ai);
+  GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
+}
+
+static void
+attr_iter_finished (void *cls)
+{
+  struct AttributeIterator *ai = cls;
+  struct GNUNET_MQ_Envelope *env;
+  struct AttributeResultMessage *arm;
+
+  env = GNUNET_MQ_msg (arm,
+                       GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_RESULT);
+  arm->id = htonl (ai->request_id);
+  arm->attr_len = htons (0);
+  GNUNET_MQ_send (ai->client->mq, env);
+  cleanup_iter_handle (ai);
+}
+
+static void
+attr_iter_cb (void *cls,
+              const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
+              const char *label,
+              unsigned int rd_count,
+              const struct GNUNET_GNSRECORD_Data *rd)
+{
+  struct AttributeIterator *ai = cls;
+  struct AttributeResultMessage *arm;
+  struct GNUNET_ABE_AbeKey *key;
+  struct GNUNET_MQ_Envelope *env;
+  ssize_t msg_extra_len;
+  char* attr_ser;
+  char* attrs[2];
+  char* data_tmp;
+  char* policy;
+  uint32_t attr_ver;
+
+  if (rd_count != 1)
   {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Malformed scopes received!\n");
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
+    GNUNET_NAMESTORE_zone_iterator_next (ai->ns_it);
+    return;
   }
-  return GNUNET_OK;
+
+  if (GNUNET_GNSRECORD_TYPE_ID_ATTR != rd->record_type) {
+    GNUNET_NAMESTORE_zone_iterator_next (ai->ns_it);
+    return;
+  }
+  attr_ver = ntohl(*((uint32_t*)rd->data));
+  GNUNET_asprintf (&policy, "%s_%lu",
+                   label, attr_ver);
+  attrs[0] = policy;
+  attrs[1] = 0;
+  key = GNUNET_ABE_cpabe_create_key (ai->abe_key,
+                                        attrs);
+  msg_extra_len = GNUNET_ABE_cpabe_decrypt (rd->data+sizeof (uint32_t),
+                                               rd->data_size-sizeof (uint32_t),
+                                               key,
+                                               (void**)&attr_ser);
+
+  GNUNET_ABE_cpabe_delete_key (key,
+                                  GNUNET_YES);
+  //GNUNET_free (policy);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Found attribute: %s\n", label);
+  env = GNUNET_MQ_msg_extra (arm,
+                             msg_extra_len,
+                             GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_RESULT);
+  arm->id = htonl (ai->request_id);
+  arm->attr_len = htons (msg_extra_len);
+  GNUNET_CRYPTO_ecdsa_key_get_public (zone,
+                                      &arm->identity);
+  data_tmp = (char *) &arm[1];
+  GNUNET_memcpy (data_tmp,
+                 attr_ser,
+                 msg_extra_len);
+  GNUNET_MQ_send (ai->client->mq, env);
+  GNUNET_free (attr_ser);
+  GNUNET_ABE_cpabe_delete_master_key (ai->abe_key);
+  ai->abe_key = NULL;
 }
 
+
 void
-attr_collect_task (void *cls)
-{
-  struct IssueHandle *issue_handle = cls;
-
-  issue_handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
-                                                               &issue_handle->iss_key,
-                                                               &attr_collect_error,
-                                                               issue_handle,
-                                                               &attr_collect,
-                                                               issue_handle,
-                                                               &attr_collect_finished,
-                                                               issue_handle);
+iterate_after_abe_bootstrap (void *cls,
+                             struct GNUNET_ABE_AbeMasterKey *abe_key)
+{
+  struct AttributeIterator *ai = cls;
+  ai->abe_key = abe_key;
+  ai->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
+                                                     &ai->identity,
+                                                     &attr_iter_error,
+                                                     ai,
+                                                     &attr_iter_cb,
+                                                     ai,
+                                                     &attr_iter_finished,
+                                                     ai);
 }
 
 void
-store_bootstrap_cont (void *cls,
-                      int32_t success,
-                      const char *emsg)
+iterate_next_after_abe_bootstrap (void *cls,
+                                  struct GNUNET_ABE_AbeMasterKey *abe_key)
 {
-  if (GNUNET_SYSERR == success)
+  struct AttributeIterator *ai = cls;
+  ai->abe_key = abe_key;
+  GNUNET_NAMESTORE_zone_iterator_next (ai->ns_it);
+}
+
+
+
+static void
+handle_iteration_start (void *cls,
+                        const struct AttributeIterationStartMessage *ais_msg)
+{
+  struct IdpClient *idp = cls;
+  struct AttributeIterator *ai;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received ATTRIBUTE_ITERATION_START message\n");
+  ai = GNUNET_new (struct AttributeIterator);
+  ai->request_id = ntohl (ais_msg->id);
+  ai->client = idp;
+  ai->identity = ais_msg->identity;
+
+  GNUNET_CONTAINER_DLL_insert (idp->op_head,
+                               idp->op_tail,
+                               ai);
+  bootstrap_abe (&ai->identity, &iterate_after_abe_bootstrap, ai, GNUNET_NO);
+  GNUNET_SERVICE_client_continue (idp->client);
+}
+
+
+static void
+handle_iteration_stop (void *cls,
+                       const struct AttributeIterationStopMessage *ais_msg)
+{
+  struct IdpClient *idp = cls;
+  struct AttributeIterator *ai;
+  uint32_t rid;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received `%s' message\n",
+              "ATTRIBUTE_ITERATION_STOP");
+  rid = ntohl (ais_msg->id);
+  for (ai = idp->op_head; NULL != ai; ai = ai->next)
+    if (ai->request_id == rid)
+      break;
+  if (NULL == ai)
   {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Failed to bootstrap ABE master %s\n",
-                emsg);
-    GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (idp->client);
     return;
   }
-  GNUNET_SCHEDULER_add_now (&attr_collect_task, cls);
+  GNUNET_CONTAINER_DLL_remove (idp->op_head,
+                               idp->op_tail,
+                               ai);
+  GNUNET_free (ai);
+  GNUNET_SERVICE_client_continue (idp->client);
 }
 
-void
-store_bootstrap_task (void *cls)
+
+static void
+handle_iteration_next (void *cls,
+                       const struct AttributeIterationNextMessage *ais_msg)
 {
-  struct IssueHandle *issue_handle = cls;
-  struct GNUNET_GNSRECORD_Data rd[1];
+  struct IdpClient *idp = cls;
+  struct AttributeIterator *ai;
+  uint32_t rid;
 
-  rd[0].data_size = GNUNET_CRYPTO_cpabe_serialize_master_key (issue_handle->abe_key,
-                                                              (void**)&rd[0].data);
-  rd[0].record_type = GNUNET_GNSRECORD_TYPE_ABE_MASTER;
-  rd[0].flags = GNUNET_GNSRECORD_RF_NONE | GNUNET_GNSRECORD_RF_PRIVATE;
-  rd[0].expiration_time = GNUNET_TIME_UNIT_HOURS.rel_value_us; //TODO sane?
-  issue_handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
-                                                        &issue_handle->iss_key,
-                                                        "+",
-                                                        1,
-                                                        rd,
-                                                        &store_bootstrap_cont,
-                                                        issue_handle);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received ATTRIBUTE_ITERATION_NEXT message\n");
+  rid = ntohl (ais_msg->id);
+  for (ai = idp->op_head; NULL != ai; ai = ai->next)
+    if (ai->request_id == rid)
+      break;
+  if (NULL == ai)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (idp->client);
+    return;
+  }
+  bootstrap_abe (&ai->identity,
+                 &iterate_next_after_abe_bootstrap,
+                 ai,
+                 GNUNET_NO);
+  GNUNET_SERVICE_client_continue (idp->client);
 }
 
-void
-abe_key_lookup_error (void *cls)
+/**
+ * Ticket iteration processor result
+ */
+enum ZoneIterationResult
+{
+  /**
+   * Iteration start.
+   */
+  IT_START = 0,
+
+  /**
+   * Found tickets,
+   * Continue to iterate with next iteration_next call
+   */
+  IT_SUCCESS_MORE_AVAILABLE = 1,
+
+  /**
+   * Iteration complete
+   */
+  IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE = 2
+};
+
+
+/**
+ * Context for ticket iteration
+ */
+struct TicketIterationProcResult
+{
+  /**
+   * The ticket iteration handle
+   */
+  struct TicketIteration *ti;
+
+  /**
+   * Iteration result: iteration done?
+   * #IT_SUCCESS_MORE_AVAILABLE:  if there may be more results overall but
+   * we got one for now and have sent it to the client
+   * #IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE: if there are no further results,
+   * #IT_START: if we are still trying to find a result.
+   */
+  int res_iteration_finished;
+
+};
+
+static void
+cleanup_ticket_iter_handle (struct TicketIteration *ti)
 {
-  GNUNET_SCHEDULER_add_now (&do_shutdown, cls);
+  GNUNET_free (ti);
 }
 
-void
-abe_key_lookup_result (void *cls,
-                       const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
-                       const char *label,
-                       unsigned int rd_count,
-                       const struct GNUNET_GNSRECORD_Data *rd)
+/**
+ * Process ticket from database
+ *
+ * @param cls struct TicketIterationProcResult
+ * @param ticket the ticket
+ * @param attrs the attributes
+ */
+static void
+ticket_iterate_proc (void *cls,
+                     const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket,
+                     const struct GNUNET_IDENTITY_ATTRIBUTE_ClaimList *attrs)
 {
-  struct IssueHandle *handle = cls;
-  int i;
+  struct TicketIterationProcResult *proc = cls;
 
-  for (i=0;i<rd_count;i++) {
-    if (GNUNET_GNSRECORD_TYPE_ABE_MASTER != rd[i].record_type)
-      continue;
-    handle->abe_key = GNUNET_CRYPTO_cpabe_deserialize_master_key ((void**)rd[i].data,
-                                                                  rd[i].data_size);
-    GNUNET_SCHEDULER_add_now (&attr_collect_task, handle);
+  if (NULL == ticket)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Iteration done\n");
+    proc->res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
     return;
   }
+  proc->res_iteration_finished = IT_SUCCESS_MORE_AVAILABLE;
+  send_ticket_result (proc->ti->client,
+                      proc->ti->r_id,
+                      ticket,
+                      attrs);
 
-  //No ABE master found, bootstrapping...
-  handle->abe_key = GNUNET_CRYPTO_cpabe_create_master_key ();
-  GNUNET_SCHEDULER_add_now (&store_bootstrap_task, handle);
 }
 
 /**
+ * Perform ticket iteration step
  *
- * Handler for issue message
- *
- * @param cls unused
- * @param client who sent the message
- * @param message the message
+ * @param ti ticket iterator to process
  */
 static void
-handle_issue_message (void *cls,
-                      const struct IssueMessage *im)
+run_ticket_iteration_round (struct TicketIteration *ti)
 {
-  const char *scopes;
-  char *scopes_tmp;
-  char *scope;
-  const char *v_attrs;
-  uint64_t rnd_key;
-  struct GNUNET_HashCode key;
-  struct IssueHandle *issue_handle;
-  struct VerifiedAttributeEntry *vattr_entry;
-  struct GNUNET_SERVICE_Client *client = cls;
-
-  scopes = (const char *) &im[1];
-  v_attrs = (const char *) &im[1] + ntohl(im->scope_len);
-  issue_handle = GNUNET_malloc (sizeof (struct IssueHandle));
-  issue_handle->attr_map = GNUNET_CONTAINER_multihashmap_create (5,
-                                                                 GNUNET_NO);
-  scopes_tmp = GNUNET_strdup (scopes);
-
-  for (scope = strtok (scopes_tmp, ","); NULL != scope; scope = strtok (NULL, ","))
+  struct TicketIterationProcResult proc;
+  struct GNUNET_MQ_Envelope *env;
+  struct TicketResultMessage *trm;
+  int ret;
+
+  memset (&proc, 0, sizeof (proc));
+  proc.ti = ti;
+  proc.res_iteration_finished = IT_START;
+  while (IT_START == proc.res_iteration_finished)
+  {
+    if (GNUNET_SYSERR ==
+        (ret = TKT_database->iterate_tickets (TKT_database->cls,
+                                              &ti->identity,
+                                              ti->is_audience,
+                                              ti->offset,
+                                              &ticket_iterate_proc,
+                                              &proc)))
+    {
+      GNUNET_break (0);
+      break;
+    }
+    if (GNUNET_NO == ret)
+      proc.res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
+    ti->offset++;
+  }
+  if (IT_SUCCESS_MORE_AVAILABLE == proc.res_iteration_finished)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "More results available\n");
+    return; /* more later */
+  }
+  /* send empty response to indicate end of list */
+  env = GNUNET_MQ_msg (trm,
+                       GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_TICKET_RESULT);
+  trm->id = htonl (ti->r_id);
+  GNUNET_MQ_send (ti->client->mq,
+                  env);
+  GNUNET_CONTAINER_DLL_remove (ti->client->ticket_iter_head,
+                               ti->client->ticket_iter_tail,
+                               ti);
+  cleanup_ticket_iter_handle (ti);
+}
+
+static void
+handle_ticket_iteration_start (void *cls,
+                               const struct TicketIterationStartMessage *tis_msg)
+{
+  struct IdpClient *client = cls;
+  struct TicketIteration *ti;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received TICKET_ITERATION_START message\n");
+  ti = GNUNET_new (struct TicketIteration);
+  ti->r_id = ntohl (tis_msg->id);
+  ti->offset = 0;
+  ti->client = client;
+  ti->identity = tis_msg->identity;
+  ti->is_audience = ntohl (tis_msg->is_audience);
+
+  GNUNET_CONTAINER_DLL_insert (client->ticket_iter_head,
+                               client->ticket_iter_tail,
+                               ti);
+  run_ticket_iteration_round (ti);
+  GNUNET_SERVICE_client_continue (client->client);
+}
+
+
+static void
+handle_ticket_iteration_stop (void *cls,
+                              const struct TicketIterationStopMessage *tis_msg)
+{
+  struct IdpClient *client = cls;
+  struct TicketIteration *ti;
+  uint32_t rid;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received `%s' message\n",
+              "TICKET_ITERATION_STOP");
+  rid = ntohl (tis_msg->id);
+  for (ti = client->ticket_iter_head; NULL != ti; ti = ti->next)
+    if (ti->r_id == rid)
+      break;
+  if (NULL == ti)
   {
-    GNUNET_CRYPTO_hash (scope,
-                        strlen (scope),
-                        &key);
-    GNUNET_CONTAINER_multihashmap_put (issue_handle->attr_map,
-                                       &key,
-                                       scope,
-                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client->client);
+    return;
   }
-  GNUNET_free (scopes_tmp);
-  /*scopes_tmp = GNUNET_strdup (v_attrs);
+  GNUNET_CONTAINER_DLL_remove (client->ticket_iter_head,
+                               client->ticket_iter_tail,
+                               ti);
+  cleanup_ticket_iter_handle (ti);
+  GNUNET_SERVICE_client_continue (client->client);
+}
+
+
+static void
+handle_ticket_iteration_next (void *cls,
+                              const struct TicketIterationNextMessage *tis_msg)
+{
+  struct IdpClient *client = cls;
+  struct TicketIteration *ti;
+  uint32_t rid;
 
-  for (scope = strtok (scopes_tmp, ","); NULL != scope; scope = strtok (NULL, ","))
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received TICKET_ITERATION_NEXT message\n");
+  rid = ntohl (tis_msg->id);
+  for (ti = client->ticket_iter_head; NULL != ti; ti = ti->next)
+    if (ti->r_id == rid)
+      break;
+  if (NULL == ti)
   {
-    vattr_entry = GNUNET_new (struct VerifiedAttributeEntry);
-    vattr_entry->name = GNUNET_strdup (scope);
-    GNUNET_CONTAINER_DLL_insert (issue_handle->v_attr_head,
-                                 issue_handle->v_attr_tail,
-                                 vattr_entry);
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client->client);
+    return;
   }
-  GNUNET_free (scopes_tmp);*/
-
-
-
-  issue_handle->r_id = im->id;
-  issue_handle->aud_key = im->aud_key;
-  issue_handle->iss_key = im->iss_key;
-  GNUNET_CRYPTO_ecdsa_key_get_public (&im->iss_key,
-                                      &issue_handle->iss_pkey);
-  issue_handle->expiration = GNUNET_TIME_absolute_ntoh (im->expiration);
-  issue_handle->nonce = ntohl (im->nonce);
-  GNUNET_SERVICE_client_continue (client);
-  issue_handle->client = client;
-  issue_handle->scopes = GNUNET_strdup (scopes);
-  issue_handle->token = token_create (&issue_handle->iss_pkey,
-                                      &issue_handle->aud_key);
-  rnd_key =
-    GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
-                              UINT64_MAX);
-  GNUNET_STRINGS_base64_encode ((char*)&rnd_key,
-                                sizeof (uint64_t),
-                                &issue_handle->label);
-  issue_handle->ns_qe = GNUNET_NAMESTORE_records_lookup (ns_handle,
-                                                         &issue_handle->iss_key,
-                                                         "+",
-                                                         &abe_key_lookup_error,
-                                                         issue_handle,
-                                                         &abe_key_lookup_result,
-                                                         issue_handle);
+  run_ticket_iteration_round (ti);
+  GNUNET_SERVICE_client_continue (client->client);
 }
 
 
+
+
 /**
  * Main function that will be run
  *
  * @param cls closure
- * @param args remaining command-line arguments
- * @param cfgfile name of the configuration file used (for saving, can be NULL)
- * @param c configuration
+ * @param c the configuration used 
+ * @param server the service handle
  */
 static void
 run (void *cls,
      const struct GNUNET_CONFIGURATION_Handle *c,
      struct GNUNET_SERVICE_Handle *server)
 {
+  char *database;
   cfg = c;
 
   stats = GNUNET_STATISTICS_create ("identity-provider", cfg);
@@ -1360,6 +2385,28 @@ run (void *cls,
   identity_handle = GNUNET_IDENTITY_connect (cfg,
                                              NULL,
                                              NULL);
+  /* Loading DB plugin */
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_string (cfg,
+                                             "identity-provider",
+                                             "database",
+                                             &database))
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "No database backend configured\n");
+  GNUNET_asprintf (&db_lib_name,
+                   "libgnunet_plugin_identity_provider_%s",
+                   database);
+  TKT_database = GNUNET_PLUGIN_load (db_lib_name,
+                                     (void *) cfg);
+  GNUNET_free (database);
+  if (NULL == TKT_database)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not load database backend `%s'\n",
+                db_lib_name);
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
 
   if (GNUNET_OK ==
       GNUNET_CONFIGURATION_get_value_time (cfg,
@@ -1390,9 +2437,39 @@ client_disconnect_cb (void *cls,
                       struct GNUNET_SERVICE_Client *client,
                       void *app_ctx)
 {
+  struct IdpClient *idp = app_ctx;
+  struct AttributeIterator *ai;
+  struct TicketIteration *ti;
+  struct TicketRevocationHandle *rh;
+
+  //TODO other operations
+
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Client %p disconnected\n",
               client);
+
+  while (NULL != (ai = idp->op_head))
+  {
+    GNUNET_CONTAINER_DLL_remove (idp->op_head,
+                                 idp->op_tail,
+                                 ai);
+    GNUNET_free (ai);
+  }
+  while (NULL != (rh = idp->revocation_list_head))
+  {
+    GNUNET_CONTAINER_DLL_remove (idp->revocation_list_head,
+                                 idp->revocation_list_tail,
+                                 rh);
+    cleanup_revoke_ticket_handle (rh);
+  }
+  while (NULL != (ti = idp->ticket_iter_head))
+  {
+    GNUNET_CONTAINER_DLL_remove (idp->ticket_iter_head,
+                                 idp->ticket_iter_tail,
+                                 ti);
+    cleanup_ticket_iter_handle (ti);
+  }
+  GNUNET_free (idp);
 }
 
 
@@ -1409,10 +2486,14 @@ client_connect_cb (void *cls,
                    struct GNUNET_SERVICE_Client *client,
                    struct GNUNET_MQ_Handle *mq)
 {
+  struct IdpClient *idp;
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Client %p connected\n",
               client);
-  return client;
+  idp = GNUNET_new (struct IdpClient);
+  idp->client = client;
+  idp->mq = mq;
+  return idp;
 }
 
 
@@ -1427,13 +2508,45 @@ GNUNET_SERVICE_MAIN
  &client_connect_cb,
  &client_disconnect_cb,
  NULL,
- GNUNET_MQ_hd_var_size (issue_message,
-                        GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE,
-                        struct IssueMessage,
+ GNUNET_MQ_hd_var_size (attribute_store_message,
+                        GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_STORE,
+                        struct AttributeStoreMessage,
+                        NULL),
+ GNUNET_MQ_hd_fixed_size (iteration_start, 
+                          GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_ITERATION_START,
+                          struct AttributeIterationStartMessage,
+                          NULL),
+ GNUNET_MQ_hd_fixed_size (iteration_next, 
+                          GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_ITERATION_NEXT,
+                          struct AttributeIterationNextMessage,
+                          NULL),
+ GNUNET_MQ_hd_fixed_size (iteration_stop, 
+                          GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ATTRIBUTE_ITERATION_STOP,
+                          struct AttributeIterationStopMessage,
+                          NULL),
+ GNUNET_MQ_hd_var_size (issue_ticket_message,
+                        GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE_TICKET,
+                        struct IssueTicketMessage,
+                        NULL),
+ GNUNET_MQ_hd_var_size (consume_ticket_message,
+                        GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_CONSUME_TICKET,
+                        struct ConsumeTicketMessage,
                         NULL),
- GNUNET_MQ_hd_var_size (exchange_message,
-                        GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE,
-                        struct ExchangeMessage,
+ GNUNET_MQ_hd_fixed_size (ticket_iteration_start, 
+                          GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_TICKET_ITERATION_START,
+                          struct TicketIterationStartMessage,
+                          NULL),
+ GNUNET_MQ_hd_fixed_size (ticket_iteration_next, 
+                          GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_TICKET_ITERATION_NEXT,
+                          struct TicketIterationNextMessage,
+                          NULL),
+ GNUNET_MQ_hd_fixed_size (ticket_iteration_stop, 
+                          GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_TICKET_ITERATION_STOP,
+                          struct TicketIterationStopMessage,
+                          NULL),
+ GNUNET_MQ_hd_var_size (revoke_ticket_message,
+                        GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_REVOKE_TICKET,
+                        struct RevokeTicketMessage,
                         NULL),
  GNUNET_MQ_handler_end());
 /* end of gnunet-service-identity-provider.c */