Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022 Taler Systems SA
       4             : 
       5             :    TALER is free software; you can redistribute it and/or modify it under the
       6             :    terms of the GNU General Public License as published by the Free Software
       7             :    Foundation; either version 3, or (at your option) any later version.
       8             : 
       9             :    TALER 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 General Public License for more details.
      12             : 
      13             :    You should have received a copy of the GNU General Public License along with
      14             :    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15             :  */
      16             : /**
      17             :  * @file exchangedb/pg_iterate_active_signkeys.c
      18             :  * @brief Implementation of the iterate_active_signkeys function for Postgres
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "taler/platform.h"
      22             : #include "taler/taler_error_codes.h"
      23             : #include "taler/taler_dbevents.h"
      24             : #include "taler/taler_pq_lib.h"
      25             : #include "pg_iterate_active_signkeys.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #signkeys_cb_helper()
      31             :  */
      32             : struct SignkeysIteratorContext
      33             : {
      34             :   /**
      35             :    * Function to call with the results.
      36             :    */
      37             :   TALER_EXCHANGEDB_ActiveSignkeysCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure to pass to @e cb
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             : };
      45             : 
      46             : 
      47             : /**
      48             :  * Helper function for #TEH_PG_iterate_active_signkeys().
      49             :  * Calls the callback with each signkey.
      50             :  *
      51             :  * @param cls a `struct SignkeysIteratorContext`
      52             :  * @param result db results
      53             :  * @param num_results number of results in @a result
      54             :  */
      55             : static void
      56          89 : signkeys_cb_helper (void *cls,
      57             :                     PGresult *result,
      58             :                     unsigned int num_results)
      59             : {
      60          89 :   struct SignkeysIteratorContext *dic = cls;
      61             : 
      62         208 :   for (unsigned int i = 0; i<num_results; i++)
      63             :   {
      64             :     struct TALER_EXCHANGEDB_SignkeyMetaData meta;
      65             :     struct TALER_ExchangePublicKeyP exchange_pub;
      66             :     struct TALER_MasterSignatureP master_sig;
      67         119 :     struct GNUNET_PQ_ResultSpec rs[] = {
      68         119 :       GNUNET_PQ_result_spec_auto_from_type ("master_sig",
      69             :                                             &master_sig),
      70         119 :       GNUNET_PQ_result_spec_auto_from_type ("exchange_pub",
      71             :                                             &exchange_pub),
      72         119 :       GNUNET_PQ_result_spec_timestamp ("valid_from",
      73             :                                        &meta.start),
      74         119 :       GNUNET_PQ_result_spec_timestamp ("expire_sign",
      75             :                                        &meta.expire_sign),
      76         119 :       GNUNET_PQ_result_spec_timestamp ("expire_legal",
      77             :                                        &meta.expire_legal),
      78             :       GNUNET_PQ_result_spec_end
      79             :     };
      80             : 
      81         119 :     if (GNUNET_OK !=
      82         119 :         GNUNET_PQ_extract_result (result,
      83             :                                   rs,
      84             :                                   i))
      85             :     {
      86           0 :       GNUNET_break (0);
      87           0 :       return;
      88             :     }
      89         119 :     dic->cb (dic->cb_cls,
      90             :              &exchange_pub,
      91             :              &meta,
      92             :              &master_sig);
      93             :   }
      94             : }
      95             : 
      96             : 
      97             : /**
      98             :  * Function called to invoke @a cb on every non-revoked exchange signing key
      99             :  * that has been signed by the master key.  Revoked and (for signing!)
     100             :  * expired keys are skipped. Runs in its own read-only transaction.
     101             :  *
     102             :  * @param cls the @e cls of this struct with the plugin-specific state
     103             :  * @param cb function to call on each signing key
     104             :  * @param cb_cls closure for @a cb
     105             :  * @return transaction status code
     106             :  */
     107             : enum GNUNET_DB_QueryStatus
     108          89 : TEH_PG_iterate_active_signkeys (void *cls,
     109             :                                 TALER_EXCHANGEDB_ActiveSignkeysCallback cb,
     110             :                                 void *cb_cls)
     111             : {
     112          89 :   struct PostgresClosure *pg = cls;
     113          89 :   struct GNUNET_TIME_Absolute now = {0};
     114          89 :   struct GNUNET_PQ_QueryParam params[] = {
     115          89 :     GNUNET_PQ_query_param_absolute_time (&now),
     116             :     GNUNET_PQ_query_param_end
     117             :   };
     118          89 :   struct SignkeysIteratorContext dic = {
     119             :     .cb = cb,
     120             :     .cb_cls = cb_cls,
     121             :   };
     122             : 
     123          89 :   PREPARE (pg,
     124             :            "select_signkeys",
     125             :            "SELECT"
     126             :            " master_sig"
     127             :            ",exchange_pub"
     128             :            ",valid_from"
     129             :            ",expire_sign"
     130             :            ",expire_legal"
     131             :            " FROM exchange_sign_keys esk"
     132             :            " WHERE"
     133             :            "   expire_sign > $1"
     134             :            " AND NOT EXISTS "
     135             :            "  (SELECT esk_serial "
     136             :            "     FROM signkey_revocations skr"
     137             :            "    WHERE esk.esk_serial = skr.esk_serial);");
     138          89 :   now = GNUNET_TIME_absolute_get ();
     139          89 :   return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     140             :                                                "select_signkeys",
     141             :                                                params,
     142             :                                                &signkeys_cb_helper,
     143             :                                                &dic);
     144             : }