merchant

merchant_api_post-management-instances-INSTANCE-auth.c (8410B)

---

 /*
   This file is part of TALER
   Copyright (C) 2014-2026 Taler Systems SA
 
   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU Lesser General Public License as published by the Free Software
   Foundation; either version 2.1, 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 Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public License along with
   TALER; see the file COPYING.LGPL.  If not, see
   <http://www.gnu.org/licenses/>
 */
 /**
  * @file merchant_api_post-management-instances-INSTANCE-auth-new.c
  * @brief Implementation of the POST /management/instances/$INSTANCE/auth request
  * @author Christian Grothoff
  */
 #include "taler/platform.h"
 #include <curl/curl.h>
 #include <jansson.h>
 #include <microhttpd.h> /* just for HTTP status codes */
 #include <gnunet/gnunet_util_lib.h>
 #include <gnunet/gnunet_curl_lib.h>
 #include <taler/taler-merchant/post-management-instances-INSTANCE-auth.h>
 #include "merchant_api_curl_defaults.h"
 #include "merchant_api_common.h"
 #include <taler/taler_json_lib.h>
 #include <taler/taler_curl_lib.h>
 
 
 /**
  * Handle for a POST /management/instances/$INSTANCE/auth operation.
  */
 struct TALER_MERCHANT_PostManagementInstancesAuthHandle
 {
   /**
    * Base URL of the merchant backend.
    */
   char *base_url;
 
   /**
    * The full URL for this request.
    */
   char *url;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_PostManagementInstancesAuthCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_MERCHANT_POST_MANAGEMENT_INSTANCES_AUTH_RESULT_CLOSURE *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 
   /**
    * Instance identifier.
    */
   char *instance_id;
 
   /**
    * New authentication password.
    */
   char *auth_password;
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP POST /management/instances/$INSTANCE/auth request.
  *
  * @param cls the `struct TALER_MERCHANT_PostManagementInstancesAuthHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_post_management_instances_auth_finished (void *cls,
                                                 long response_code,
                                                 const void *response)
 {
   struct TALER_MERCHANT_PostManagementInstancesAuthHandle *piah = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_PostManagementInstancesAuthResponse iar = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   piah->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "POST /management/instances/$INSTANCE/auth completed with "
               "response code %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_ACCEPTED:
     if (GNUNET_OK !=
         TALER_MERCHANT_parse_mfa_challenge_response_ (
           json,
           &iar.details.accepted))
     {
       GNUNET_break_op (0);
       iar.hr.http_status = 0;
       iar.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     }
     break;
   case MHD_HTTP_BAD_REQUEST:
     iar.hr.ec = TALER_JSON_get_error_code (json);
     iar.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_UNAUTHORIZED:
     iar.hr.ec = TALER_JSON_get_error_code (json);
     iar.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   default:
     iar.hr.ec = TALER_JSON_get_error_code (json);
     iar.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
                 (int) iar.hr.ec);
     break;
   }
   piah->cb (piah->cb_cls,
             &iar);
   if (MHD_HTTP_ACCEPTED == response_code)
     TALER_MERCHANT_mfa_challenge_response_free (
       &iar.details.accepted);
   TALER_MERCHANT_post_management_instances_auth_cancel (piah);
 }
 
 
 struct TALER_MERCHANT_PostManagementInstancesAuthHandle *
 TALER_MERCHANT_post_management_instances_auth_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const char *instance_id)
 {
   struct TALER_MERCHANT_PostManagementInstancesAuthHandle *piah;
 
   piah = GNUNET_new (struct TALER_MERCHANT_PostManagementInstancesAuthHandle);
   piah->ctx = ctx;
   piah->base_url = GNUNET_strdup (url);
   if (NULL != instance_id)
     piah->instance_id = GNUNET_strdup (instance_id);
   return piah;
 }
 
 
 void
 TALER_MERCHANT_post_management_instances_auth_set_options_ (
   struct TALER_MERCHANT_PostManagementInstancesAuthHandle *piah,
   unsigned int num_options,
   const struct TALER_MERCHANT_PostManagementInstancesAuthOptionValue options[])
 {
   for (unsigned int i = 0; i < num_options; i++)
   {
     switch (options[i].option)
     {
     case TALER_MERCHANT_POST_MANAGEMENT_INSTANCES_AUTH_OPTION_END:
       return;
     case TALER_MERCHANT_POST_MANAGEMENT_INSTANCES_AUTH_OPTION_PASSWORD:
       GNUNET_free (piah->auth_password);
       if (NULL != options[i].details.password)
         piah->auth_password = GNUNET_strdup (
           options[i].details.password);
       break;
     }
   }
 }
 
 
 enum TALER_ErrorCode
 TALER_MERCHANT_post_management_instances_auth_start (
   struct TALER_MERCHANT_PostManagementInstancesAuthHandle *piah,
   TALER_MERCHANT_PostManagementInstancesAuthCallback cb,
   TALER_MERCHANT_POST_MANAGEMENT_INSTANCES_AUTH_RESULT_CLOSURE *cb_cls)
 {
   json_t *req_obj;
   CURL *eh;
 
   piah->cb = cb;
   piah->cb_cls = cb_cls;
   if (NULL != piah->instance_id)
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "management/instances/%s/auth",
                      piah->instance_id);
     piah->url = TALER_url_join (piah->base_url,
                                 path,
                                 NULL);
     GNUNET_free (path);
   }
   else
   {
     /* backend_url is already identifying the instance */
     piah->url = TALER_url_join (piah->base_url,
                                 "private/auth",
                                 NULL);
   }
   if (NULL == piah->url)
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
 
   if (NULL == piah->auth_password)
   {
     req_obj = GNUNET_JSON_PACK (
       GNUNET_JSON_pack_string ("method",
                                "external"));
   }
   else
   {
     req_obj = GNUNET_JSON_PACK (
       GNUNET_JSON_pack_string ("method",
                                "token"),
       GNUNET_JSON_pack_string ("password",
                                piah->auth_password));
   }
   eh = TALER_MERCHANT_curl_easy_get_ (piah->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&piah->post_ctx,
                               eh,
                               req_obj)) )
   {
     GNUNET_break (0);
     json_decref (req_obj);
     if (NULL != eh)
       curl_easy_cleanup (eh);
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   json_decref (req_obj);
   GNUNET_assert (CURLE_OK ==
                  curl_easy_setopt (eh,
                                    CURLOPT_CUSTOMREQUEST,
                                    MHD_HTTP_METHOD_POST));
   piah->job = GNUNET_CURL_job_add2 (piah->ctx,
                                     eh,
                                     piah->post_ctx.headers,
                                     &
                                     handle_post_management_instances_auth_finished,
                                     piah);
   if (NULL == piah->job)
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_MERCHANT_post_management_instances_auth_cancel (
   struct TALER_MERCHANT_PostManagementInstancesAuthHandle *piah)
 {
   if (NULL != piah->job)
   {
     GNUNET_CURL_job_cancel (piah->job);
     piah->job = NULL;
   }
   TALER_curl_easy_post_finished (&piah->post_ctx);
   GNUNET_free (piah->instance_id);
   GNUNET_free (piah->auth_password);
   GNUNET_free (piah->url);
   GNUNET_free (piah->base_url);
   GNUNET_free (piah);
 }
 
 
 /* end of merchant_api_post-management-instances-INSTANCE-auth-new.c */