Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2025 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 src/backenddb/iterate_order_token_blinded_sigs.c
      18              :  * @brief Implementation of the select blinded sigs by order_id function for Postgres
      19              :  * @author Bohdan Potuzhnyi
      20              :  */
      21              : #include "platform.h"
      22              : #include <taler/taler_pq_lib.h>
      23              : #include "merchant-database/iterate_order_token_blinded_sigs.h"
      24              : #include "helper.h"
      25              : 
      26              : /**
      27              :  * @brief Context for the callback to handle the result of the blinded sigs selection.
      28              :  */
      29              : struct SelectBlindedSigsContext
      30              : {
      31              :   /**
      32              :    * @brief Callback to be called with the result of the blinded sigs selection.
      33              :    */
      34              :   void *cb_cls;
      35              : 
      36              :   /**
      37              :    * @brief Callback to be called with the result of the blinded sigs selection.
      38              :    */
      39              :   TALER_MERCHANTDB_BlindedSigCallback cb;
      40              : 
      41              :   /**
      42              :    * @brief Result status of the query.
      43              :    */
      44              :   enum GNUNET_DB_QueryStatus qs;
      45              : };
      46              : 
      47              : 
      48              : /**
      49              :  * @brief Callback to handle the result of the blinded sigs selection.
      50              :  *
      51              :  * @param cls the closure containing the callback and its context
      52              :  * @param result the result of the query
      53              :  * @param num_results number of results in the result set
      54              :  */
      55              : static void
      56            4 : restore_sig_cb (void *cls,
      57              :                 PGresult *result,
      58              :                 unsigned int num_results)
      59              : {
      60            4 :   struct SelectBlindedSigsContext *ctx = cls;
      61              : 
      62            4 :   for (unsigned int i = 0; i < num_results; i++)
      63              :   {
      64              :     struct GNUNET_HashCode h_issue;
      65              :     struct GNUNET_CRYPTO_BlindedSignature *sig;
      66            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      67            0 :       GNUNET_PQ_result_spec_auto_from_type ("token_hash",
      68              :                                             &h_issue),
      69            0 :       GNUNET_PQ_result_spec_blinded_sig ("token_blinded_signature",
      70              :                                          &sig),
      71              :       GNUNET_PQ_result_spec_end
      72              :     };
      73              : 
      74            0 :     if (GNUNET_OK !=
      75            0 :         GNUNET_PQ_extract_result (result,
      76              :                                   rs,
      77              :                                   i))
      78              :     {
      79            0 :       ctx->qs = GNUNET_DB_STATUS_HARD_ERROR;
      80            0 :       return;
      81              :     }
      82            0 :     ctx->cb (ctx->cb_cls,
      83              :              &h_issue,
      84              :              sig);
      85            0 :     GNUNET_PQ_cleanup_result (rs);
      86              :   }
      87              : }
      88              : 
      89              : 
      90              : enum GNUNET_DB_QueryStatus
      91            4 : TALER_MERCHANTDB_iterate_order_token_blinded_sigs (
      92              :   struct TALER_MERCHANTDB_PostgresContext *pg,
      93              :   const char *order_id,
      94              :   TALER_MERCHANTDB_BlindedSigCallback cb,
      95              :   void *cb_cls)
      96              : {
      97            4 :   struct SelectBlindedSigsContext ctx = {
      98              :     .cb = cb,
      99              :     .cb_cls = cb_cls,
     100              :     .qs = GNUNET_DB_STATUS_SUCCESS_NO_RESULTS
     101              :   };
     102            4 :   struct GNUNET_PQ_QueryParam params[] = {
     103            4 :     GNUNET_PQ_query_param_string (order_id),
     104              :     GNUNET_PQ_query_param_end
     105              :   };
     106              :   enum GNUNET_DB_QueryStatus qs;
     107              : 
     108            4 :   GNUNET_assert (NULL != pg->current_merchant_id);
     109            4 :   TMH_PQ_prepare_anon (pg,
     110              :                        "SELECT"
     111              :                        "  motbs.token_blinded_signature"
     112              :                        " ,motbs.token_hash"
     113              :                        " FROM merchant_order_token_blinded_sigs AS motbs"
     114              :                        " JOIN merchant_contract_terms AS mct USING (order_serial)"
     115              :                        " WHERE mct.order_id = $1"
     116              :                        " ORDER BY motbs.token_index ASC");
     117            4 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     118              :     pg->conn,
     119              :     "",
     120              :     params,
     121              :     &restore_sig_cb,
     122              :     &ctx);
     123              :   /* propagate an extraction failure recorded by the row callback */
     124            4 :   if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != ctx.qs)
     125            0 :     return ctx.qs;
     126            4 :   return qs;
     127              : }