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/*
This file is part of TALER
Copyright (C) 2015-2020 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_management_revoke_denomination_key.c
* @brief functions to revoke an exchange denomination key
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_exchange_service.h"
#include "exchange_api_curl_defaults.h"
#include "taler_signatures.h"
#include "taler_curl_lib.h"
#include "taler_json_lib.h"
/**
* @brief Handle for a POST /management/denominations/$H_DENOM_PUB/revoke request.
*/
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle
{
/**
* The url for this request.
*/
char *url;
/**
* Minor context that holds body and headers.
*/
struct TALER_CURL_PostContext post_ctx;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_EXCHANGE_ManagementRevokeDenominationKeyCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Function called when we're done processing the
* HTTP /management/denominations/$H_DENOM_PUB/revoke request.
*
* @param cls the `struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *`
* @param response_code HTTP response code, 0 on error
* @param response response body, NULL if not in JSON
*/
static void
handle_revoke_denomination_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *rh = cls;
const json_t *json = response;
struct TALER_EXCHANGE_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
rh->job = NULL;
switch (response_code)
{
case 0:
/* no reply */
hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
hr.hint = "server offline?";
break;
case MHD_HTTP_NO_CONTENT:
break;
case MHD_HTTP_FORBIDDEN:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
default:
/* unexpected response code */
GNUNET_break_op (0);
hr.ec = TALER_JSON_get_error_code (json);
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) hr.ec);
break;
}
if (NULL != rh->cb)
{
rh->cb (rh->cb_cls,
&hr);
rh->cb = NULL;
}
TALER_EXCHANGE_management_revoke_denomination_key_cancel (rh);
}
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *
TALER_EXCHANGE_management_revoke_denomination_key (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_DenominationHashP *h_denom_pub,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementRevokeDenominationKeyCallback cb,
void *cb_cls)
{
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *rh;
CURL *eh;
json_t *body;
rh = GNUNET_new (struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle);
rh->cb = cb;
rh->cb_cls = cb_cls;
rh->ctx = ctx;
{
char epub_str[sizeof (*h_denom_pub) * 2];
char arg_str[sizeof (epub_str) + 64];
char *end;
end = GNUNET_STRINGS_data_to_string (h_denom_pub,
sizeof (*h_denom_pub),
epub_str,
sizeof (epub_str));
*end = '\0';
GNUNET_snprintf (arg_str,
sizeof (arg_str),
"management/denominations/%s/revoke",
epub_str);
rh->url = TALER_url_join (url,
arg_str,
NULL);
}
if (NULL == rh->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
GNUNET_free (rh);
return NULL;
}
body = GNUNET_JSON_PACK (
GNUNET_JSON_pack_data_auto ("master_sig",
master_sig));
if (NULL == body)
{
GNUNET_break (0);
GNUNET_free (rh->url);
GNUNET_free (rh);
return NULL;
}
eh = TALER_EXCHANGE_curl_easy_get_ (rh->url);
if (GNUNET_OK !=
TALER_curl_easy_post (&rh->post_ctx,
eh,
body))
{
GNUNET_break (0);
json_decref (body);
GNUNET_free (rh->url);
GNUNET_free (eh);
return NULL;
}
json_decref (body);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Requesting URL '%s'\n",
rh->url);
rh->job = GNUNET_CURL_job_add2 (ctx,
eh,
rh->post_ctx.headers,
&handle_revoke_denomination_finished,
rh);
if (NULL == rh->job)
{
TALER_EXCHANGE_management_revoke_denomination_key_cancel (rh);
return NULL;
}
return rh;
}
void
TALER_EXCHANGE_management_revoke_denomination_key_cancel (
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *rh)
{
if (NULL != rh->job)
{
GNUNET_CURL_job_cancel (rh->job);
rh->job = NULL;
}
TALER_curl_easy_post_finished (&rh->post_ctx);
GNUNET_free (rh->url);
GNUNET_free (rh);
}
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