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/*
This file is part of TALER
(C) 2014, 2015 Christian Grothoff (and other contributing authors)
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, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file backend/taler-merchant-httpd_contract.c
* @brief HTTP serving layer mainly intended to communicate with the frontend
* @author Marcello Stanisci
*/
#include "platform.h"
#include <microhttpd.h>
#include <jansson.h>
#include <gnunet/gnunet_util_lib.h>
#include <curl/curl.h>
#include <taler/taler_signatures.h>
#include <taler/taler_amount_lib.h>
#include <taler/taler_json_lib.h>
#include <taler/taler_mint_service.h>
#include "taler-merchant-httpd.h"
#include "taler-merchant-httpd_parsing.h"
#include "taler-merchant-httpd_auditors.h"
#include "taler-merchant-httpd_mints.h"
#include "taler-merchant-httpd_responses.h"
#include "taler_merchantdb_lib.h"
#include "taler-merchant-httpd.h"
/**
* Manage a contract request. In practical terms, it adds the fields 'mints',
* 'merchant_pub', and 'H_wire' to the contract 'proposition' gotten from the
* frontend. Finally, it adds (outside of the contract) a signature of the
* (hashed stringification) of this contract and the hashed stringification
* of this contract to the final bundle sent back to the frontend.
* @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
MH_handler_contract (struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
json_t *root;
int res;
struct GNUNET_HashCode h_wire;
struct GNUNET_CRYPTO_EddsaPublicKey pubkey;
struct TALER_ContractPS contract;
struct GNUNET_CRYPTO_EddsaSignature contract_sig;
res = TMH_PARSE_post_json (connection,
connection_cls,
upload_data,
upload_data_size,
&root);
if (GNUNET_SYSERR == res)
return MHD_NO;
/* the POST's body has to be further fetched */
if ((GNUNET_NO == res) || (NULL == root))
return MHD_YES;
json_object_set_new (root,
"mints",
trusted_mints);
json_object_set_new (root,
"auditors",
j_auditors);
json_object_set_new (root,
"H_wire",
TALER_json_from_data (&h_wire,
sizeof (h_wire)));
GNUNET_CRYPTO_eddsa_key_get_public (privkey, &pubkey);
json_object_set_new (root,
"merchant_pub",
TALER_json_from_data (&pubkey, sizeof (pubkey)));
GNUNET_assert (GNUNET_OK ==
TALER_hash_json (root,
&contract.h_contract));
contract.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_CONTRACT);
contract.purpose.size = htonl (sizeof (contract));
GNUNET_CRYPTO_eddsa_sign (privkey,
&contract.purpose,
&contract_sig);
return TMH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_OK,
"{s:o, s:o, s:o}",
"contract", root,
"sig", TALER_json_from_data
(&contract_sig,
sizeof (contract_sig)),
"H_contract", TALER_json_from_data
(&contract.h_contract,
sizeof (contract.h_contract)));
}
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