exchange

exchange_api_post-management-denominations-H_DENOM_PUB-revoke.c (7434B)

---

 /*
   This file is part of TALER
   Copyright (C) 2015-2026 Taler Systems SA
 
   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU General Public License as published by the Free Software
   Foundation; either version 3, or (at your option) any later version.
 
   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License along with
   TALER; see the file COPYING.  If not, see
   <http://www.gnu.org/licenses/>
 */
 /**
  * @file lib/exchange_api_post-management-denominations-H_DENOM_PUB-revoke.c
  * @brief functions to revoke an exchange denomination key
  * @author Christian Grothoff
  */
 #include "taler/platform.h"
 #include "taler/taler_json_lib.h"
 #include <gnunet/gnunet_curl_lib.h>
 #include <microhttpd.h>
 #include "taler/taler_exchange_service.h"
 #include \
   "taler/taler-exchange/post-management-denominations-H_DENOM_PUB-revoke.h"
 #include "exchange_api_curl_defaults.h"
 #include "taler/taler_signatures.h"
 #include "taler/taler_curl_lib.h"
 
 
 /**
  * @brief Handle for a POST /management/denominations/$H_DENOM_PUB/revoke request.
  */
 struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle
 {
 
   /**
    * The base URL for this request.
    */
   char *base_url;
 
   /**
    * The full URL for this request, set during _start.
    */
   char *url;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_EXCHANGE_PostManagementDenominationsRevokeCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_EXCHANGE_POST_MANAGEMENT_DENOMINATIONS_REVOKE_RESULT_CLOSURE *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Hash of the denomination public key to revoke.
    */
   struct TALER_DenominationHashP h_denom_pub;
 
   /**
    * Signature affirming the revocation.
    */
   struct TALER_MasterSignatureP master_sig;
 
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP POST /management/denominations/$H_DENOM_PUB/revoke request.
  *
  * @param cls the `struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_denominations_revoke_finished (void *cls,
                                       long response_code,
                                       const void *response)
 {
   struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh = cls;
   const json_t *json = response;
   struct TALER_EXCHANGE_PostManagementDenominationsRevokeResponse res = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   pmdrh->job = NULL;
   switch (response_code)
   {
   case 0:
     /* no reply */
     res.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     res.hr.hint = "server offline?";
     break;
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_FORBIDDEN:
     res.hr.ec = TALER_JSON_get_error_code (json);
     res.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   default:
     /* unexpected response code */
     GNUNET_break_op (0);
     res.hr.ec = TALER_JSON_get_error_code (json);
     res.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d for exchange management revoke denomination\n",
                 (unsigned int) response_code,
                 (int) res.hr.ec);
     break;
   }
   if (NULL != pmdrh->cb)
   {
     pmdrh->cb (pmdrh->cb_cls,
                &res);
     pmdrh->cb = NULL;
   }
   TALER_EXCHANGE_post_management_denominations_revoke_cancel (pmdrh);
 }
 
 
 struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *
 TALER_EXCHANGE_post_management_denominations_revoke_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const struct TALER_DenominationHashP *h_denom_pub,
   const struct TALER_MasterSignatureP *master_sig)
 {
   struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh;
 
   pmdrh = GNUNET_new (
     struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle);
   pmdrh->ctx = ctx;
   pmdrh->base_url = GNUNET_strdup (url);
   pmdrh->h_denom_pub = *h_denom_pub;
   pmdrh->master_sig = *master_sig;
   return pmdrh;
 }
 
 
 enum TALER_ErrorCode
 TALER_EXCHANGE_post_management_denominations_revoke_start (
   struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh,
   TALER_EXCHANGE_PostManagementDenominationsRevokeCallback cb,
   TALER_EXCHANGE_POST_MANAGEMENT_DENOMINATIONS_REVOKE_RESULT_CLOSURE *cb_cls)
 {
   CURL *eh;
   json_t *body;
 
   pmdrh->cb = cb;
   pmdrh->cb_cls = cb_cls;
   {
     char epub_str[sizeof (pmdrh->h_denom_pub) * 2];
     char arg_str[sizeof (epub_str) + 64];
     char *end;
 
     end = GNUNET_STRINGS_data_to_string (&pmdrh->h_denom_pub,
                                          sizeof (pmdrh->h_denom_pub),
                                          epub_str,
                                          sizeof (epub_str));
     *end = '\0';
     GNUNET_snprintf (arg_str,
                      sizeof (arg_str),
                      "management/denominations/%s/revoke",
                      epub_str);
     pmdrh->url = TALER_url_join (pmdrh->base_url,
                                  arg_str,
                                  NULL);
   }
   if (NULL == pmdrh->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Could not construct request URL.\n");
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   }
   body = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_data_auto ("master_sig",
                                 &pmdrh->master_sig));
   eh = TALER_EXCHANGE_curl_easy_get_ (pmdrh->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&pmdrh->post_ctx,
                               eh,
                               body)) )
   {
     GNUNET_break (0);
     if (NULL != eh)
       curl_easy_cleanup (eh);
     json_decref (body);
     GNUNET_free (pmdrh->url);
     pmdrh->url = NULL;
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   json_decref (body);
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Requesting URL '%s'\n",
               pmdrh->url);
   pmdrh->job = GNUNET_CURL_job_add2 (pmdrh->ctx,
                                      eh,
                                      pmdrh->post_ctx.headers,
                                      &handle_denominations_revoke_finished,
                                      pmdrh);
   if (NULL == pmdrh->job)
   {
     GNUNET_break (0);
     TALER_curl_easy_post_finished (&pmdrh->post_ctx);
     GNUNET_free (pmdrh->url);
     pmdrh->url = NULL;
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_EXCHANGE_post_management_denominations_revoke_cancel (
   struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh)
 {
   if (NULL != pmdrh->job)
   {
     GNUNET_CURL_job_cancel (pmdrh->job);
     pmdrh->job = NULL;
   }
   TALER_curl_easy_post_finished (&pmdrh->post_ctx);
   GNUNET_free (pmdrh->url);
   GNUNET_free (pmdrh->base_url);
   GNUNET_free (pmdrh);
 }
 
 
 /* end of exchange_api_post-management-denominations-H_DENOM_PUB-revoke.c */