anastasis

Credential backup and recovery protocol and service
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anastasis-db_get_key_share.c (2256B)

      1 /*
      2   This file is part of Anastasis
      3   Copyright (C) 2020-2022 Anastasis SARL
      4 
      5   Anastasis is free software; you can redistribute it and/or modify it under the
      6   terms of the GNU Affero General Public License as published by the Free Software
      7   Foundation; either version 3, or (at your option) any later version.
      8 
      9   Anastasis is distributed in the hope that it will be useful, but WITHOUT ANY
     10   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11   A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
     12 
     13   You should have received a copy of the GNU Affero General Public License along with
     14   Anastasis; see the file COPYING.GPL.  If not, see <http://www.gnu.org/licenses/>
     15 */
     16 /**
     17  * @file stasis/anastasis-db_get_key_share.c
     18  * @brief Anastasis database: get key share
     19  * @author Christian Grothoff
     20  */
     21 #include "platform.h"
     22 #include "anastasis-db_pg.h"
     23 #include "anastasis/anastasis-database/get_key_share.h"
     24 #include "anastasis/anastasis-database/transaction.h"
     25 #include "anastasis/anastasis-database/preflight.h"
     26 #include <taler/taler_pq_lib.h>
     27 
     28 
     29 /**
     30  * Lookup (encrypted) key share by @a truth_uuid.
     31  *
     32  * @param truth_uuid the identifier for the Truth
     33  * @param[out] key_share contains the encrypted Keyshare
     34  * @return transaction status
     35  */
     36 enum GNUNET_DB_QueryStatus
     37 ANASTASIS_DB_get_key_share (
     38   const struct ANASTASIS_CRYPTO_TruthUUIDP *truth_uuid,
     39   struct ANASTASIS_CRYPTO_EncryptedKeyShareP *key_share)
     40 {
     41   struct GNUNET_PQ_QueryParam params[] = {
     42     GNUNET_PQ_query_param_auto_from_type (truth_uuid),
     43     GNUNET_PQ_query_param_end
     44   };
     45   struct GNUNET_PQ_ResultSpec rs[] = {
     46     GNUNET_PQ_result_spec_auto_from_type ("key_share_data",
     47                                           key_share),
     48     GNUNET_PQ_result_spec_end
     49   };
     50 
     51   PREPARE ("key_share_select",
     52            "SELECT "
     53            "key_share_data "
     54            "FROM "
     55            "anastasis_truth "
     56            "WHERE truth_uuid =$1;");
     57   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     58                                                    "key_share_select",
     59                                                    params,
     60                                                    rs);
     61 }
     62 
     63 
     64 /* end of anastasis-db_get_key_share.c */