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_revoke_signing_key.c
      19             :  * @brief functions to revoke an exchange online signing 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             : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle
      34             : {
      35             : 
      36             :   /**
      37             :    * The url for this request.
      38             :    */
      39             :   char *url;
      40             : 
      41             :   /**
      42             :    * Minor context that holds body and headers.
      43             :    */
      44             :   struct TALER_CURL_PostContext post_ctx;
      45             : 
      46             :   /**
      47             :    * Handle for the request.
      48             :    */
      49             :   struct GNUNET_CURL_Job *job;
      50             : 
      51             :   /**
      52             :    * Function to call with the result.
      53             :    */
      54             :   TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb;
      55             : 
      56             :   /**
      57             :    * Closure for @a cb.
      58             :    */
      59             :   void *cb_cls;
      60             : 
      61             :   /**
      62             :    * Reference to the execution context.
      63             :    */
      64             :   struct GNUNET_CURL_Context *ctx;
      65             : };
      66             : 
      67             : 
      68             : /**
      69             :  * Function called when we're done processing the
      70             :  * HTTP /management/signkeys/%s/revoke request.
      71             :  *
      72             :  * @param cls the `struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *`
      73             :  * @param response_code HTTP response code, 0 on error
      74             :  * @param response response body, NULL if not in JSON
      75             :  */
      76             : static void
      77           0 : handle_revoke_signing_finished (void *cls,
      78             :                                 long response_code,
      79             :                                 const void *response)
      80             : {
      81           0 :   struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh = cls;
      82           0 :   const json_t *json = response;
      83           0 :   struct TALER_EXCHANGE_ManagementRevokeSigningKeyResponse rsr = {
      84           0 :     .hr.http_status = (unsigned int) response_code,
      85             :     .hr.reply = json
      86             :   };
      87             : 
      88           0 :   rh->job = NULL;
      89           0 :   switch (response_code)
      90             :   {
      91           0 :   case 0:
      92             :     /* no reply */
      93           0 :     rsr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
      94           0 :     rsr.hr.hint = "server offline?";
      95           0 :     break;
      96           0 :   case MHD_HTTP_NO_CONTENT:
      97           0 :     break;
      98           0 :   case MHD_HTTP_FORBIDDEN:
      99           0 :     rsr.hr.ec = TALER_JSON_get_error_code (json);
     100           0 :     rsr.hr.hint = TALER_JSON_get_error_hint (json);
     101           0 :     break;
     102           0 :   default:
     103             :     /* unexpected response code */
     104           0 :     GNUNET_break_op (0);
     105           0 :     rsr.hr.ec = TALER_JSON_get_error_code (json);
     106           0 :     rsr.hr.hint = TALER_JSON_get_error_hint (json);
     107           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     108             :                 "Unexpected response code %u/%d for exchange management revoke signkey\n",
     109             :                 (unsigned int) response_code,
     110             :                 (int) rsr.hr.ec);
     111           0 :     break;
     112             :   }
     113           0 :   if (NULL != rh->cb)
     114             :   {
     115           0 :     rh->cb (rh->cb_cls,
     116             :             &rsr);
     117           0 :     rh->cb = NULL;
     118             :   }
     119           0 :   TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
     120           0 : }
     121             : 
     122             : 
     123             : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *
     124           0 : TALER_EXCHANGE_management_revoke_signing_key (
     125             :   struct GNUNET_CURL_Context *ctx,
     126             :   const char *url,
     127             :   const struct TALER_ExchangePublicKeyP *exchange_pub,
     128             :   const struct TALER_MasterSignatureP *master_sig,
     129             :   TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb,
     130             :   void *cb_cls)
     131             : {
     132             :   struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh;
     133             :   CURL *eh;
     134             :   json_t *body;
     135             : 
     136           0 :   rh = GNUNET_new (struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle);
     137           0 :   rh->cb = cb;
     138           0 :   rh->cb_cls = cb_cls;
     139           0 :   rh->ctx = ctx;
     140             :   {
     141             :     char epub_str[sizeof (*exchange_pub) * 2];
     142             :     char arg_str[sizeof (epub_str) + 64];
     143             :     char *end;
     144             : 
     145           0 :     end = GNUNET_STRINGS_data_to_string (exchange_pub,
     146             :                                          sizeof (*exchange_pub),
     147             :                                          epub_str,
     148             :                                          sizeof (epub_str));
     149           0 :     *end = '\0';
     150           0 :     GNUNET_snprintf (arg_str,
     151             :                      sizeof (arg_str),
     152             :                      "management/signkeys/%s/revoke",
     153             :                      epub_str);
     154           0 :     rh->url = TALER_url_join (url,
     155             :                               arg_str,
     156             :                               NULL);
     157             :   }
     158           0 :   if (NULL == rh->url)
     159             :   {
     160           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     161             :                 "Could not construct request URL.\n");
     162           0 :     GNUNET_free (rh);
     163           0 :     return NULL;
     164             :   }
     165           0 :   body = GNUNET_JSON_PACK (
     166             :     GNUNET_JSON_pack_data_auto ("master_sig",
     167             :                                 master_sig));
     168           0 :   eh = TALER_EXCHANGE_curl_easy_get_ (rh->url);
     169           0 :   if ( (NULL == eh) ||
     170             :        (GNUNET_OK !=
     171           0 :         TALER_curl_easy_post (&rh->post_ctx,
     172             :                               eh,
     173             :                               body)) )
     174             :   {
     175           0 :     GNUNET_break (0);
     176           0 :     if (NULL != eh)
     177           0 :       curl_easy_cleanup (eh);
     178           0 :     json_decref (body);
     179           0 :     GNUNET_free (rh->url);
     180           0 :     GNUNET_free (rh);
     181           0 :     return NULL;
     182             :   }
     183           0 :   json_decref (body);
     184           0 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     185             :               "Requesting URL '%s'\n",
     186             :               rh->url);
     187           0 :   rh->job = GNUNET_CURL_job_add2 (ctx,
     188             :                                   eh,
     189           0 :                                   rh->post_ctx.headers,
     190             :                                   &handle_revoke_signing_finished,
     191             :                                   rh);
     192           0 :   if (NULL == rh->job)
     193             :   {
     194           0 :     TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
     195           0 :     return NULL;
     196             :   }
     197           0 :   return rh;
     198             : }
     199             : 
     200             : 
     201             : void
     202           0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (
     203             :   struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh)
     204             : {
     205           0 :   if (NULL != rh->job)
     206             :   {
     207           0 :     GNUNET_CURL_job_cancel (rh->job);
     208           0 :     rh->job = NULL;
     209             :   }
     210           0 :   TALER_curl_easy_post_finished (&rh->post_ctx);
     211           0 :   GNUNET_free (rh->url);
     212           0 :   GNUNET_free (rh);
     213           0 : }