Line data    Source code

       1              : /*
       2              :    This file is part of Challenger
       3              :    Copyright (C) 2023 Taler Systems SA
       4              : 
       5              :    Challenger 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              :    Challenger 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              :    Challenger; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15              :  */
      16              : /**
      17              :  * @file src/challengerdb/do_solve_challenge.c
      18              :  * @brief Implementation of the do_solve_challenge function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "platform.h"
      22              : #include <taler/taler_error_codes.h>
      23              : #include <taler/taler_dbevents.h>
      24              : #include <taler/taler_pq_lib.h>
      25              : #include "do_solve_challenge.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : 
      29              : enum GNUNET_DB_QueryStatus
      30           44 : CHALLENGERDB_do_solve_challenge (
      31              :   struct CHALLENGERDB_PostgresContext *ctx,
      32              :   const struct CHALLENGER_ValidationNonceP *nonce,
      33              :   uint32_t new_pin,
      34              :   bool *solved,
      35              :   bool *exhausted,
      36              :   bool *no_challenge,
      37              :   char **state,
      38              :   uint32_t *addr_left,
      39              :   uint32_t *auth_attempts_left,
      40              :   uint32_t *pin_transmissions_left,
      41              :   char **client_redirect_uri)
      42              : {
      43              :   struct GNUNET_TIME_Absolute now
      44           44 :     = GNUNET_TIME_absolute_get ();
      45           44 :   struct GNUNET_PQ_QueryParam params[] = {
      46           44 :     GNUNET_PQ_query_param_auto_from_type (nonce),
      47           44 :     GNUNET_PQ_query_param_uint32 (&new_pin),
      48           44 :     GNUNET_PQ_query_param_absolute_time (&now),
      49              :     GNUNET_PQ_query_param_end
      50              :   };
      51              :   bool not_found;
      52           44 :   struct GNUNET_PQ_ResultSpec rs[] = {
      53           44 :     GNUNET_PQ_result_spec_bool ("not_found",
      54              :                                 &not_found),
      55           44 :     GNUNET_PQ_result_spec_bool ("solved",
      56              :                                 solved),
      57           44 :     GNUNET_PQ_result_spec_bool ("exhausted",
      58              :                                 exhausted),
      59           44 :     GNUNET_PQ_result_spec_bool ("no_challenge",
      60              :                                 no_challenge),
      61           44 :     GNUNET_PQ_result_spec_uint32 ("address_attempts_left",
      62              :                                   addr_left),
      63           44 :     GNUNET_PQ_result_spec_uint32 ("auth_attempts_left",
      64              :                                   auth_attempts_left),
      65           44 :     GNUNET_PQ_result_spec_uint32 ("pin_transmissions_left",
      66              :                                   pin_transmissions_left),
      67           44 :     GNUNET_PQ_result_spec_allow_null (
      68              :       GNUNET_PQ_result_spec_string ("client_redirect_uri",
      69              :                                     client_redirect_uri),
      70              :       NULL),
      71           44 :     GNUNET_PQ_result_spec_allow_null (
      72              :       GNUNET_PQ_result_spec_string ("state",
      73              :                                     state),
      74              :       NULL),
      75              :     GNUNET_PQ_result_spec_end
      76              :   };
      77              :   enum GNUNET_DB_QueryStatus qs;
      78              : 
      79           44 :   *client_redirect_uri = NULL;
      80           44 :   PREPARE (ctx,
      81              :            "do_solve_challenge",
      82              :            "SELECT "
      83              :            " out_not_found AS not_found"
      84              :            ",out_solved AS solved"
      85              :            ",out_exhausted AS exhausted"
      86              :            ",out_no_challenge AS no_challenge"
      87              :            ",out_state AS state"
      88              :            ",out_address_attempts_left AS address_attempts_left"
      89              :            ",out_auth_attempts_left AS auth_attempts_left"
      90              :            ",out_pin_transmissions_left AS pin_transmissions_left"
      91              :            ",out_client_redirect_uri AS client_redirect_uri"
      92              :            " FROM challenger_do_validate_and_solve_pin"
      93              :            " ($1,$2,$3);");
      94           44 :   qs = GNUNET_PQ_eval_prepared_singleton_select (ctx->conn,
      95              :                                                  "do_solve_challenge",
      96              :                                                  params,
      97              :                                                  rs);
      98           44 :   if (qs <= 0)
      99            0 :     return qs;
     100           44 :   if (not_found)
     101            0 :     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
     102              :   /* On the solved path the stored procedure returns the -1 sentinel (kept in
     103              :      the DB to mark the challenge as solved), which the uint32 result spec reads
     104              :      as 4294967295.  That value is not meaningful to the caller (which only
     105              :      reads it when !solved); normalize it to 0 to avoid leaking the sentinel. */
     106           44 :   if (*solved)
     107           12 :     *auth_attempts_left = 0;
     108           44 :   return qs;
     109              : }