LCOV - code coverage report
Current view: top level - lib - exchange_api_management_post_keys.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 49 80 61.2 %
Date: 2025-06-22 12:09:43 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2015-2021 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
      15             :   <http://www.gnu.org/licenses/>
      16             : */
      17             : /**
      18             :  * @file lib/exchange_api_management_post_keys.c
      19             :  * @brief functions to affirm the validity of exchange keys using the master private key
      20             :  * @author Christian Grothoff
      21             :  */
      22             : #include "taler/platform.h"
      23             : #include "taler/taler_json_lib.h"
      24             : #include <gnunet/gnunet_curl_lib.h>
      25             : #include <microhttpd.h>
      26             : #include "taler/taler_exchange_service.h"
      27             : #include "exchange_api_curl_defaults.h"
      28             : #include "taler/taler_signatures.h"
      29             : #include "taler/taler_curl_lib.h"
      30             : #include "taler/taler_json_lib.h"
      31             : 
      32             : 
      33             : /**
      34             :  * @brief Handle for a POST /management/keys request.
      35             :  */
      36             : struct TALER_EXCHANGE_ManagementPostKeysHandle
      37             : {
      38             : 
      39             :   /**
      40             :    * The url for this request.
      41             :    */
      42             :   char *url;
      43             : 
      44             :   /**
      45             :    * Minor context that holds body and headers.
      46             :    */
      47             :   struct TALER_CURL_PostContext post_ctx;
      48             : 
      49             :   /**
      50             :    * Handle for the request.
      51             :    */
      52             :   struct GNUNET_CURL_Job *job;
      53             : 
      54             :   /**
      55             :    * Function to call with the result.
      56             :    */
      57             :   TALER_EXCHANGE_ManagementPostKeysCallback cb;
      58             : 
      59             :   /**
      60             :    * Closure for @a cb.
      61             :    */
      62             :   void *cb_cls;
      63             : 
      64             :   /**
      65             :    * Reference to the execution context.
      66             :    */
      67             :   struct GNUNET_CURL_Context *ctx;
      68             : };
      69             : 
      70             : 
      71             : /**
      72             :  * Function called when we're done processing the
      73             :  * HTTP POST /management/keys request.
      74             :  *
      75             :  * @param cls the `struct TALER_EXCHANGE_ManagementPostKeysHandle *`
      76             :  * @param response_code HTTP response code, 0 on error
      77             :  * @param response response body, NULL if not in JSON
      78             :  */
      79             : static void
      80          21 : handle_post_keys_finished (void *cls,
      81             :                            long response_code,
      82             :                            const void *response)
      83             : {
      84          21 :   struct TALER_EXCHANGE_ManagementPostKeysHandle *ph = cls;
      85          21 :   const json_t *json = response;
      86          21 :   struct TALER_EXCHANGE_ManagementPostKeysResponse pkr = {
      87          21 :     .hr.http_status = (unsigned int) response_code,
      88             :     .hr.reply = json
      89             :   };
      90             : 
      91          21 :   ph->job = NULL;
      92          21 :   switch (response_code)
      93             :   {
      94          21 :   case MHD_HTTP_NO_CONTENT:
      95          21 :     break;
      96           0 :   case MHD_HTTP_FORBIDDEN:
      97           0 :     pkr.hr.ec = TALER_JSON_get_error_code (json);
      98           0 :     pkr.hr.hint = TALER_JSON_get_error_hint (json);
      99           0 :     break;
     100           0 :   case MHD_HTTP_NOT_FOUND:
     101           0 :     pkr.hr.ec = TALER_JSON_get_error_code (json);
     102           0 :     pkr.hr.hint = TALER_JSON_get_error_hint (json);
     103           0 :     break;
     104           0 :   case MHD_HTTP_REQUEST_ENTITY_TOO_LARGE:
     105           0 :     pkr.hr.ec = TALER_JSON_get_error_code (json);
     106           0 :     pkr.hr.hint = TALER_JSON_get_error_hint (json);
     107           0 :     break;
     108           0 :   default:
     109             :     /* unexpected response code */
     110           0 :     GNUNET_break_op (0);
     111           0 :     pkr.hr.ec = TALER_JSON_get_error_code (json);
     112           0 :     pkr.hr.hint = TALER_JSON_get_error_hint (json);
     113           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     114             :                 "Unexpected response code %u/%d for exchange management post keys\n",
     115             :                 (unsigned int) response_code,
     116             :                 (int) pkr.hr.ec);
     117           0 :     break;
     118             :   }
     119          21 :   if (NULL != ph->cb)
     120             :   {
     121          21 :     ph->cb (ph->cb_cls,
     122             :             &pkr);
     123          21 :     ph->cb = NULL;
     124             :   }
     125          21 :   TALER_EXCHANGE_post_management_keys_cancel (ph);
     126          21 : }
     127             : 
     128             : 
     129             : struct TALER_EXCHANGE_ManagementPostKeysHandle *
     130          21 : TALER_EXCHANGE_post_management_keys (
     131             :   struct GNUNET_CURL_Context *ctx,
     132             :   const char *url,
     133             :   const struct TALER_EXCHANGE_ManagementPostKeysData *pkd,
     134             :   TALER_EXCHANGE_ManagementPostKeysCallback cb,
     135             :   void *cb_cls)
     136             : {
     137             :   struct TALER_EXCHANGE_ManagementPostKeysHandle *ph;
     138             :   CURL *eh;
     139             :   json_t *body;
     140             :   json_t *denom_sigs;
     141             :   json_t *signkey_sigs;
     142             : 
     143          21 :   ph = GNUNET_new (struct TALER_EXCHANGE_ManagementPostKeysHandle);
     144          21 :   ph->cb = cb;
     145          21 :   ph->cb_cls = cb_cls;
     146          21 :   ph->ctx = ctx;
     147          21 :   ph->url = TALER_url_join (url,
     148             :                             "management/keys",
     149             :                             NULL);
     150          21 :   if (NULL == ph->url)
     151             :   {
     152           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     153             :                 "Could not construct request URL.\n");
     154           0 :     GNUNET_free (ph);
     155           0 :     return NULL;
     156             :   }
     157          21 :   denom_sigs = json_array ();
     158          21 :   GNUNET_assert (NULL != denom_sigs);
     159        6241 :   for (unsigned int i = 0; i<pkd->num_denom_sigs; i++)
     160             :   {
     161        6220 :     const struct TALER_EXCHANGE_DenominationKeySignature *dks
     162        6220 :       = &pkd->denom_sigs[i];
     163             : 
     164        6220 :     GNUNET_assert (0 ==
     165             :                    json_array_append_new (
     166             :                      denom_sigs,
     167             :                      GNUNET_JSON_PACK (
     168             :                        GNUNET_JSON_pack_data_auto ("h_denom_pub",
     169             :                                                    &dks->h_denom_pub),
     170             :                        GNUNET_JSON_pack_data_auto ("master_sig",
     171             :                                                    &dks->master_sig))));
     172             :   }
     173          21 :   signkey_sigs = json_array ();
     174          21 :   GNUNET_assert (NULL != signkey_sigs);
     175          88 :   for (unsigned int i = 0; i<pkd->num_sign_sigs; i++)
     176             :   {
     177          67 :     const struct TALER_EXCHANGE_SigningKeySignature *sks
     178          67 :       = &pkd->sign_sigs[i];
     179             : 
     180          67 :     GNUNET_assert (0 ==
     181             :                    json_array_append_new (
     182             :                      signkey_sigs,
     183             :                      GNUNET_JSON_PACK (
     184             :                        GNUNET_JSON_pack_data_auto ("exchange_pub",
     185             :                                                    &sks->exchange_pub),
     186             :                        GNUNET_JSON_pack_data_auto ("master_sig",
     187             :                                                    &sks->master_sig))));
     188             :   }
     189          21 :   body = GNUNET_JSON_PACK (
     190             :     GNUNET_JSON_pack_array_steal ("denom_sigs",
     191             :                                   denom_sigs),
     192             :     GNUNET_JSON_pack_array_steal ("signkey_sigs",
     193             :                                   signkey_sigs));
     194          21 :   eh = TALER_EXCHANGE_curl_easy_get_ (ph->url);
     195          42 :   if ( (NULL == eh) ||
     196             :        (GNUNET_OK !=
     197          21 :         TALER_curl_easy_post (&ph->post_ctx,
     198             :                               eh,
     199             :                               body)) )
     200             :   {
     201           0 :     GNUNET_break (0);
     202           0 :     if (NULL != eh)
     203           0 :       curl_easy_cleanup (eh);
     204           0 :     json_decref (body);
     205           0 :     GNUNET_free (ph->url);
     206           0 :     return NULL;
     207             :   }
     208          21 :   json_decref (body);
     209          21 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     210             :               "Requesting URL '%s'\n",
     211             :               ph->url);
     212          42 :   ph->job = GNUNET_CURL_job_add2 (ctx,
     213             :                                   eh,
     214          21 :                                   ph->post_ctx.headers,
     215             :                                   &handle_post_keys_finished,
     216             :                                   ph);
     217          21 :   if (NULL == ph->job)
     218             :   {
     219           0 :     TALER_EXCHANGE_post_management_keys_cancel (ph);
     220           0 :     return NULL;
     221             :   }
     222          21 :   return ph;
     223             : }
     224             : 
     225             : 
     226             : void
     227          21 : TALER_EXCHANGE_post_management_keys_cancel (
     228             :   struct TALER_EXCHANGE_ManagementPostKeysHandle *ph)
     229             : {
     230          21 :   if (NULL != ph->job)
     231             :   {
     232           0 :     GNUNET_CURL_job_cancel (ph->job);
     233           0 :     ph->job = NULL;
     234             :   }
     235          21 :   TALER_curl_easy_post_finished (&ph->post_ctx);
     236          21 :   GNUNET_free (ph->url);
     237          21 :   GNUNET_free (ph);
     238          21 : }

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