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/*
This file is part of TALER
Copyright (C) 2014,2015 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, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-mint-httpd_reserve.c
* @brief Handle /reserve/ requests
* @author Florian Dold
* @author Benedikt Mueller
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include "taler-mint-httpd_reserve.h"
#include "taler-mint-httpd_parsing.h"
#include "taler-mint-httpd_responses.h"
#include "taler-mint-httpd_keystate.h"
/**
* Handle a "/reserve/status" request. Parses the
* given "reserve_pub" argument (which should contain the
* EdDSA public key of a reserve) and then respond with the
* status of the reserve.
*
* @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
TMH_RESERVE_handler_reserve_status (struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
struct TALER_ReservePublicKeyP reserve_pub;
int res;
res = TMH_PARSE_mhd_request_arg_data (connection,
"reserve_pub",
&reserve_pub,
sizeof (struct TALER_ReservePublicKeyP));
if (GNUNET_SYSERR == res)
return MHD_NO; /* internal error */
if (GNUNET_NO == res)
return MHD_YES; /* parse error */
return TMH_DB_execute_reserve_status (connection,
&reserve_pub);
}
/**
* Handle a "/reserve/withdraw" request. Parses the "reserve_pub"
* EdDSA key of the reserve and the requested "denom_pub" which
* specifies the key/value of the coin to be withdrawn, and checks
* that the signature "reserve_sig" makes this a valid withdrawl
* request from the specified reserve. If so, the envelope
* with the blinded coin "coin_ev" is passed down to execute the
* withdrawl operation.
*
* @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
TMH_RESERVE_handler_reserve_withdraw (struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
json_t *root;
struct TALER_WithdrawRequestPS wsrd;
int res;
struct TALER_DenominationPublicKey denomination_pub;
char *blinded_msg;
size_t blinded_msg_len;
struct TALER_Amount amount;
struct TALER_Amount amount_with_fee;
struct TALER_Amount fee_withdraw;
struct TALER_ReserveSignatureP signature;
struct TALER_MINTDB_DenominationKeyIssueInformation *dki;
struct TMH_KS_StateHandle *ks;
struct TMH_PARSE_FieldSpecification spec[] = {
TMH_PARSE_member_variable ("coin_ev",
(void **) &blinded_msg,
&blinded_msg_len),
TMH_PARSE_member_fixed ("reserve_pub",
&wsrd.reserve_pub),
TMH_PARSE_member_fixed ("reserve_sig",
&signature),
TMH_PARSE_member_denomination_public_key ("denom_pub",
&denomination_pub),
TMH_PARSE_MEMBER_END
};
res = TMH_PARSE_post_json (connection,
connection_cls,
upload_data,
upload_data_size,
&root);
if (GNUNET_SYSERR == res)
return MHD_NO;
if ( (GNUNET_NO == res) || (NULL == root) )
return MHD_YES;
res = TMH_PARSE_json_data (connection,
root,
spec);
json_decref (root);
if (GNUNET_OK != res)
return (GNUNET_SYSERR == res) ? MHD_NO : MHD_YES;
ks = TMH_KS_acquire ();
dki = TMH_KS_denomination_key_lookup (ks,
&denomination_pub,
TMH_KS_DKU_WITHDRAW);
if (NULL == dki)
{
TMH_PARSE_release_data (spec);
return TMH_RESPONSE_reply_arg_unknown (connection,
"denom_pub");
}
TALER_amount_ntoh (&amount,
&dki->issue.properties.value);
TALER_amount_ntoh (&fee_withdraw,
&dki->issue.properties.fee_withdraw);
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&amount_with_fee,
&amount,
&fee_withdraw));
TALER_amount_hton (&wsrd.amount_with_fee,
&amount_with_fee);
TALER_amount_hton (&wsrd.withdraw_fee,
&fee_withdraw);
TMH_KS_release (ks);
/* verify signature! */
wsrd.purpose.size = htonl (sizeof (struct TALER_WithdrawRequestPS));
wsrd.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_RESERVE_WITHDRAW);
GNUNET_CRYPTO_rsa_public_key_hash (denomination_pub.rsa_public_key,
&wsrd.h_denomination_pub);
GNUNET_CRYPTO_hash (blinded_msg,
blinded_msg_len,
&wsrd.h_coin_envelope);
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_RESERVE_WITHDRAW,
&wsrd.purpose,
&signature.eddsa_signature,
&wsrd.reserve_pub.eddsa_pub))
{
TALER_LOG_WARNING ("Client supplied invalid signature for /reserve/withdraw request\n");
TMH_PARSE_release_data (spec);
return TMH_RESPONSE_reply_signature_invalid (connection,
"reserve_sig");
}
res = TMH_DB_execute_reserve_withdraw (connection,
&wsrd.reserve_pub,
&denomination_pub,
blinded_msg,
blinded_msg_len,
&signature);
TMH_PARSE_release_data (spec);
return res;
}
/* end of taler-mint-httpd_reserve.c */
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