merchant

Merchant backend to process payments, run by merchants
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solve_mfa_challenge.c (2835B)

      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/solve_mfa_challenge.c
     18  * @brief Implementation of the solve_mfa_challenge function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "platform.h"
     22 #include <taler/taler_pq_lib.h>
     23 #include "taler/taler_merchant_util.h"
     24 #include "merchant-database/solve_mfa_challenge.h"
     25 #include "helper.h"
     26 
     27 
     28 enum GNUNET_DB_QueryStatus
     29 TALER_MERCHANTDB_solve_mfa_challenge (
     30   struct TALER_MERCHANTDB_PostgresContext *pg,
     31   uint64_t challenge_id,
     32   const struct TALER_MERCHANT_MFA_BodyHash *h_body,
     33   const char *solution,
     34   bool *solved,
     35   uint32_t *retry_counter)
     36 {
     37   struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
     38   bool no_match;
     39   struct GNUNET_PQ_QueryParam params[] = {
     40     GNUNET_PQ_query_param_uint64 (&challenge_id),
     41     GNUNET_PQ_query_param_auto_from_type (h_body),
     42     GNUNET_PQ_query_param_string (solution),
     43     GNUNET_PQ_query_param_absolute_time (&now),
     44     GNUNET_PQ_query_param_end
     45   };
     46   struct GNUNET_PQ_ResultSpec rs[] = {
     47     GNUNET_PQ_result_spec_bool ("out_solved",
     48                                 solved),
     49     GNUNET_PQ_result_spec_allow_null (
     50       GNUNET_PQ_result_spec_uint32 ("out_retry_counter",
     51                                     retry_counter),
     52       &no_match),
     53     GNUNET_PQ_result_spec_end
     54   };
     55   enum GNUNET_DB_QueryStatus qs;
     56 
     57   /* conservatively set security-relevant return values to
     58      safe values, even though these should not be used with qs <= 0 */
     59   *solved = false;
     60   *retry_counter = 0;
     61   TMH_PQ_prepare_anon (pg,
     62                        "SELECT"
     63                        "  out_solved"
     64                        " ,out_retry_counter"
     65                        "  FROM merchant.merchant_do_solve_mfa_challenge"
     66                        " ($1, $2, $3, $4);");
     67   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     68                                                  "",
     69                                                  params,
     70                                                  rs);
     71   if (qs <= 0)
     72     return qs;
     73   if (no_match)
     74   {
     75     GNUNET_PQ_cleanup_result (rs);
     76     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
     77   }
     78   GNUNET_PQ_cleanup_result (rs);
     79   return qs;
     80 }