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/*
This file is part of TALER
Copyright (C) 2014, 2015, 2016 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-exchange-httpd_tracking.c
* @brief Handle wire transfer tracking-related requests
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include <pthread.h>
#include "taler_signatures.h"
#include "taler-exchange-httpd_parsing.h"
#include "taler-exchange-httpd_tracking.h"
#include "taler-exchange-httpd_responses.h"
/**
* Handle a "/track/transfer" request.
*
* @param rh context of the handler
* @param connection the MHD connection to handle
* @param[in,out] connection_cls the connection's closure (can be updated)
* @param upload_data upload data
* @param[in,out] upload_data_size number of bytes (left) in @a upload_data
* @return MHD result code
*/
int
TEH_TRACKING_handler_track_transfer (struct TEH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
struct TALER_WireTransferIdentifierRawP wtid;
int res;
res = TEH_PARSE_mhd_request_arg_data (connection,
"wtid",
&wtid,
sizeof (struct TALER_WireTransferIdentifierRawP));
if (GNUNET_SYSERR == res)
return MHD_NO; /* internal error */
if (GNUNET_NO == res)
return MHD_YES; /* parse error */
return TEH_DB_execute_track_transfer (connection,
&wtid);
}
/**
* Check the merchant signature, and if it is valid,
* return the wire transfer identifier.
*
* @param connection the MHD connection to handle
* @param tps signed request to execute
* @param merchant_pub public key from the merchant
* @param merchant_sig signature from the merchant (to be checked)
* @param transaction_id transaction ID (in host byte order)
* @return MHD result code
*/
static int
check_and_handle_track_transaction_request (struct MHD_Connection *connection,
const struct TALER_DepositTrackPS *tps,
struct TALER_MerchantPublicKeyP *merchant_pub,
struct TALER_MerchantSignatureP *merchant_sig,
uint64_t transaction_id)
{
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION,
&tps->purpose,
&merchant_sig->eddsa_sig,
&merchant_pub->eddsa_pub))
{
GNUNET_break_op (0);
return TEH_RESPONSE_reply_signature_invalid (connection,
"merchant_sig");
}
return TEH_DB_execute_track_transaction (connection,
&tps->h_contract,
&tps->h_wire,
&tps->coin_pub,
merchant_pub,
transaction_id);
}
/**
* Handle a "/track/transaction" request.
*
* @param rh context of the handler
* @param connection the MHD connection to handle
* @param[in,out] connection_cls the connection's closure (can be updated)
* @param upload_data upload data
* @param[in,out] upload_data_size number of bytes (left) in @a upload_data
* @return MHD result code
*/
int
TEH_TRACKING_handler_track_transaction (struct TEH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
int res;
json_t *json;
struct TALER_DepositTrackPS tps;
uint64_t transaction_id;
struct TALER_MerchantSignatureP merchant_sig;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_fixed_auto ("H_wire", &tps.h_wire),
GNUNET_JSON_spec_fixed_auto ("H_contract", &tps.h_contract),
GNUNET_JSON_spec_fixed_auto ("coin_pub", &tps.coin_pub),
GNUNET_JSON_spec_uint64 ("transaction_id", &transaction_id),
GNUNET_JSON_spec_fixed_auto ("merchant_pub", &tps.merchant),
GNUNET_JSON_spec_fixed_auto ("merchant_sig", &merchant_sig),
GNUNET_JSON_spec_end ()
};
res = TEH_PARSE_post_json (connection,
connection_cls,
upload_data,
upload_data_size,
&json);
if (GNUNET_SYSERR == res)
return MHD_NO;
if ( (GNUNET_NO == res) || (NULL == json) )
return MHD_YES;
res = TEH_PARSE_json_data (connection,
json,
spec);
if (GNUNET_OK != res)
{
json_decref (json);
return (GNUNET_NO == res) ? MHD_YES : MHD_NO;
}
tps.purpose.size = htonl (sizeof (struct TALER_DepositTrackPS));
tps.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION);
tps.transaction_id = GNUNET_htonll (transaction_id);
res = check_and_handle_track_transaction_request (connection,
&tps,
&tps.merchant,
&merchant_sig,
transaction_id);
GNUNET_JSON_parse_free (spec);
json_decref (json);
return res;
}
/* end of taler-exchange-httpd_tracking.c */
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