exchange

testing_api_cmd_reserve_attest.c (6619B)

---

 /*
   This file is part of TALER
   Copyright (C) 2014-2022 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 testing/testing_api_cmd_reserve_attest.c
  * @brief Implement the /reserve/$RID/attest test command.
  * @author Christian Grothoff
  */
 #include "taler/platform.h"
 #include "taler/taler_json_lib.h"
 #include <gnunet/gnunet_curl_lib.h>
 #include "taler/taler_testing_lib.h"
 
 /**
  * State for a "attest" CMD.
  */
 struct AttestState
 {
   /**
    * Label to the command which created the reserve to check,
    * needed to resort the reserve key.
    */
   const char *reserve_reference;
 
   /**
    * Handle to the "reserve attest" operation.
    */
   struct TALER_EXCHANGE_ReservesAttestHandle *rsh;
 
   /**
    * Private key of the reserve being analyzed.
    */
   const struct TALER_ReservePrivateKeyP *reserve_priv;
 
   /**
    * Public key of the reserve being analyzed.
    */
   struct TALER_ReservePublicKeyP reserve_pub;
 
   /**
    * Array of attributes to request, of length @e attrs_len.
    */
   const char **attrs;
 
   /**
    * Length of the @e attrs array.
    */
   unsigned int attrs_len;
 
   /**
    * Expected HTTP response code.
    */
   unsigned int expected_response_code;
 
   /**
    * Interpreter state.
    */
   struct TALER_TESTING_Interpreter *is;
 
   /* FIXME: expose fields below as traits... */
 
   /**
    * Attested attributes returned by the exchange.
    */
   json_t *attributes;
 
   /**
    * Expiration time of the attested attributes.
    */
   struct GNUNET_TIME_Timestamp expiration_time;
 
   /**
    * Signature by the exchange affirming the attributes.
    */
   struct TALER_ExchangeSignatureP exchange_sig;
 
   /**
    * Online signing key used by the exchange.
    */
   struct TALER_ExchangePublicKeyP exchange_pub;
 };
 
 
 /**
  * Check that the reserve balance and HTTP response code are
  * both acceptable.
  *
  * @param cls closure.
  * @param rs HTTP response details
  */
 static void
 reserve_attest_cb (
   void *cls,
   const struct TALER_EXCHANGE_ReservePostAttestResult *rs)
 {
   struct AttestState *ss = cls;
   struct TALER_TESTING_Interpreter *is = ss->is;
 
   ss->rsh = NULL;
   if (ss->expected_response_code != rs->hr.http_status)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected HTTP response code: %d in %s:%u\n",
                 rs->hr.http_status,
                 __FILE__,
                 __LINE__);
     json_dumpf (rs->hr.reply,
                 stderr,
                 JSON_INDENT (2));
     TALER_TESTING_interpreter_fail (ss->is);
     return;
   }
   if (MHD_HTTP_OK != rs->hr.http_status)
   {
     TALER_TESTING_interpreter_next (is);
     return;
   }
   ss->attributes = json_incref ((json_t*) rs->details.ok.attributes);
   ss->expiration_time = rs->details.ok.expiration_time;
   ss->exchange_pub = rs->details.ok.exchange_pub;
   ss->exchange_sig = rs->details.ok.exchange_sig;
   TALER_TESTING_interpreter_next (is);
 }
 
 
 /**
  * Run the command.
  *
  * @param cls closure.
  * @param cmd the command being executed.
  * @param is the interpreter state.
  */
 static void
 attest_run (void *cls,
             const struct TALER_TESTING_Command *cmd,
             struct TALER_TESTING_Interpreter *is)
 {
   struct AttestState *ss = cls;
   const struct TALER_TESTING_Command *create_reserve;
   const char *exchange_url;
 
   ss->is = is;
   exchange_url = TALER_TESTING_get_exchange_url (is);
   if (NULL == exchange_url)
   {
     GNUNET_break (0);
     return;
   }
   create_reserve
     = TALER_TESTING_interpreter_lookup_command (is,
                                                 ss->reserve_reference);
 
   if (NULL == create_reserve)
   {
     GNUNET_break (0);
     TALER_TESTING_interpreter_fail (is);
     return;
   }
   if (GNUNET_OK !=
       TALER_TESTING_get_trait_reserve_priv (create_reserve,
                                             &ss->reserve_priv))
   {
     GNUNET_break (0);
     TALER_LOG_ERROR ("Failed to find reserve_priv for attest query\n");
     TALER_TESTING_interpreter_fail (is);
     return;
   }
   GNUNET_CRYPTO_eddsa_key_get_public (&ss->reserve_priv->eddsa_priv,
                                       &ss->reserve_pub.eddsa_pub);
   ss->rsh = TALER_EXCHANGE_reserves_attest (
     TALER_TESTING_interpreter_get_context (is),
     exchange_url,
     TALER_TESTING_get_keys (is),
     ss->reserve_priv,
     ss->attrs_len,
     ss->attrs,
     &reserve_attest_cb,
     ss);
 }
 
 
 /**
  * Cleanup the state from a "reserve attest" CMD, and possibly
  * cancel a pending operation thereof.
  *
  * @param cls closure.
  * @param cmd the command which is being cleaned up.
  */
 static void
 attest_cleanup (void *cls,
                 const struct TALER_TESTING_Command *cmd)
 {
   struct AttestState *ss = cls;
 
   if (NULL != ss->rsh)
   {
     TALER_TESTING_command_incomplete (ss->is,
                                       cmd->label);
     TALER_EXCHANGE_reserves_attest_cancel (ss->rsh);
     ss->rsh = NULL;
   }
   json_decref (ss->attributes);
   GNUNET_free (ss->attrs);
   GNUNET_free (ss);
 }
 
 
 struct TALER_TESTING_Command
 TALER_TESTING_cmd_reserve_attest (const char *label,
                                   const char *reserve_reference,
                                   unsigned int expected_response_code,
                                   ...)
 {
   struct AttestState *ss;
   unsigned int num_args;
   const char *ea;
   va_list ap;
 
   num_args = 0;
   va_start (ap, expected_response_code);
   while (NULL != va_arg (ap, const char *))
     num_args++;
   va_end (ap);
 
   GNUNET_assert (NULL != reserve_reference);
   ss = GNUNET_new (struct AttestState);
   ss->reserve_reference = reserve_reference;
   ss->expected_response_code = expected_response_code;
   ss->attrs_len = num_args;
   ss->attrs = GNUNET_new_array (num_args,
                                 const char *);
   num_args = 0;
   va_start (ap, expected_response_code);
   while (NULL != (ea = va_arg (ap, const char *)))
     ss->attrs[num_args++] = ea;
   va_end (ap);
 
   {
     struct TALER_TESTING_Command cmd = {
       .cls = ss,
       .label = label,
       .run = &attest_run,
       .cleanup = &attest_cleanup
     };
 
     return cmd;
   }
 }