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           41 : signkeys_cb_helper (void *cls,
      57              :                     PGresult *result,
      58              :                     unsigned int num_results)
      59              : {
      60           41 :   struct SignkeysIteratorContext *dic = cls;
      61              : 
      62           68 :   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           27 :     struct GNUNET_PQ_ResultSpec rs[] = {
      68           27 :       GNUNET_PQ_result_spec_auto_from_type ("master_sig",
      69              :                                             &master_sig),
      70           27 :       GNUNET_PQ_result_spec_auto_from_type ("exchange_pub",
      71              :                                             &exchange_pub),
      72           27 :       GNUNET_PQ_result_spec_timestamp ("valid_from",
      73              :                                        &meta.start),
      74           27 :       GNUNET_PQ_result_spec_timestamp ("expire_sign",
      75              :                                        &meta.expire_sign),
      76           27 :       GNUNET_PQ_result_spec_timestamp ("expire_legal",
      77              :                                        &meta.expire_legal),
      78              :       GNUNET_PQ_result_spec_end
      79              :     };
      80              : 
      81           27 :     if (GNUNET_OK !=
      82           27 :         GNUNET_PQ_extract_result (result,
      83              :                                   rs,
      84              :                                   i))
      85              :     {
      86            0 :       GNUNET_break (0);
      87            0 :       return;
      88              :     }
      89           27 :     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           41 : TEH_PG_iterate_active_signkeys (void *cls,
     109              :                                 TALER_EXCHANGEDB_ActiveSignkeysCallback cb,
     110              :                                 void *cb_cls)
     111              : {
     112           41 :   struct PostgresClosure *pg = cls;
     113           41 :   struct GNUNET_TIME_Absolute now = {0};
     114           41 :   struct GNUNET_PQ_QueryParam params[] = {
     115           41 :     GNUNET_PQ_query_param_absolute_time (&now),
     116              :     GNUNET_PQ_query_param_end
     117              :   };
     118           41 :   struct SignkeysIteratorContext dic = {
     119              :     .cb = cb,
     120              :     .cb_cls = cb_cls,
     121              :   };
     122              : 
     123           41 :   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           41 :   now = GNUNET_TIME_absolute_get ();
     139           41 :   return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     140              :                                                "select_signkeys",
     141              :                                                params,
     142              :                                                &signkeys_cb_helper,
     143              :                                                &dic);
     144              : }