anastasis

Credential backup and recovery protocol and service
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anastasis-db_get_latest_recovery_document.c (3253B)

      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_latest_recovery_document.c
     18  * @brief Anastasis database: get latest recovery document
     19  * @author Christian Grothoff
     20  */
     21 #include "platform.h"
     22 #include "anastasis-db_pg.h"
     23 #include "anastasis/anastasis-database/get_latest_recovery_document.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  * Fetch latest recovery document for user.
     31  *
     32  * @param account_pub public key of the user's account
     33  * @param account_sig signature
     34  * @param recovery_data_hash hash of the current recovery data
     35  * @param data_size size of data blob
     36  * @param data blob which contains the recovery document
     37  * @param[out] version set to the version number of the policy being returned
     38  * @return transaction status
     39  */
     40 enum GNUNET_DB_QueryStatus
     41 ANASTASIS_DB_get_latest_recovery_document (
     42   const struct ANASTASIS_CRYPTO_AccountPublicKeyP *account_pub,
     43   struct ANASTASIS_AccountSignatureP *account_sig,
     44   struct GNUNET_HashCode *recovery_data_hash,
     45   size_t *data_size,
     46   void **data,
     47   uint32_t *version)
     48 {
     49   struct GNUNET_PQ_QueryParam params[] = {
     50     GNUNET_PQ_query_param_auto_from_type (account_pub),
     51     GNUNET_PQ_query_param_end
     52   };
     53   struct GNUNET_PQ_ResultSpec rs[] = {
     54     GNUNET_PQ_result_spec_uint32 ("version",
     55                                   version),
     56     GNUNET_PQ_result_spec_auto_from_type ("account_sig",
     57                                           account_sig),
     58     GNUNET_PQ_result_spec_auto_from_type ("recovery_data_hash",
     59                                           recovery_data_hash),
     60     GNUNET_PQ_result_spec_variable_size ("recovery_data",
     61                                          data,
     62                                          data_size),
     63     GNUNET_PQ_result_spec_end
     64   };
     65 
     66   GNUNET_break (GNUNET_OK ==
     67                 ANASTASIS_DB_preflight ());
     68   PREPARE ("latest_recoverydocument_select",
     69            "SELECT "
     70            " version"
     71            ",account_sig"
     72            ",recovery_data_hash"
     73            ",recovery_data"
     74            " FROM anastasis_recoverydocument"
     75            " WHERE user_id=$1"
     76            " ORDER BY version DESC"
     77            " LIMIT 1;");
     78   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     79                                                    "latest_recoverydocument_select",
     80                                                    params,
     81                                                    rs);
     82 }
     83 
     84 
     85 /* end of anastasis-db_get_latest_recovery_document.c */