295 lines
10 KiB
C
295 lines
10 KiB
C
/*
|
|
This file is part of TALER
|
|
Copyright (C) 2014 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_deposit.c
|
|
* @brief Handle /deposit requests; parses the POST and JSON and
|
|
* verifies the coin signature before handing things off
|
|
* to the database.
|
|
* @author Florian Dold
|
|
* @author Benedikt Mueller
|
|
* @author Christian Grothoff
|
|
*
|
|
* TODO:
|
|
* - missing 'wire' format check (well-formed SEPA-details)
|
|
* - ugliy if-construction for deposit type
|
|
*/
|
|
#include "platform.h"
|
|
#include <gnunet/gnunet_util_lib.h>
|
|
#include <jansson.h>
|
|
#include <microhttpd.h>
|
|
#include <pthread.h>
|
|
#include "taler_mintdb_plugin.h"
|
|
#include "taler_signatures.h"
|
|
#include "taler_util.h"
|
|
#include "taler-mint-httpd_parsing.h"
|
|
#include "taler-mint-httpd_db.h"
|
|
#include "taler-mint-httpd_deposit.h"
|
|
#include "taler-mint-httpd_responses.h"
|
|
#include "taler-mint-httpd_keystate.h"
|
|
|
|
|
|
/**
|
|
* We have parsed the JSON information about the deposit, do some
|
|
* basic sanity checks (especially that the signature on the coin is
|
|
* valid, and that this type of coin exists) and then execute the
|
|
* deposit.
|
|
*
|
|
* @param connection the MHD connection to handle
|
|
* @param deposit information about the deposit
|
|
* @return MHD result code
|
|
*/
|
|
static int
|
|
verify_and_execute_deposit (struct MHD_Connection *connection,
|
|
const struct TALER_MINTDB_Deposit *deposit)
|
|
{
|
|
struct TMH_KS_StateHandle *key_state;
|
|
struct TALER_DepositRequestPS dr;
|
|
struct TALER_MINTDB_DenominationKeyIssueInformation *dki;
|
|
struct TALER_Amount fee_deposit;
|
|
|
|
dr.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_DEPOSIT);
|
|
dr.purpose.size = htonl (sizeof (struct TALER_DepositRequestPS));
|
|
dr.h_contract = deposit->h_contract;
|
|
dr.h_wire = deposit->h_wire;
|
|
dr.timestamp = GNUNET_TIME_absolute_hton (deposit->timestamp);
|
|
dr.refund_deadline = GNUNET_TIME_absolute_hton (deposit->refund_deadline);
|
|
dr.transaction_id = GNUNET_htonll (deposit->transaction_id);
|
|
TALER_amount_hton (&dr.amount_with_fee,
|
|
&deposit->amount_with_fee);
|
|
TALER_amount_hton (&dr.deposit_fee,
|
|
&deposit->deposit_fee);
|
|
dr.merchant = deposit->merchant_pub;
|
|
dr.coin_pub = deposit->coin.coin_pub;
|
|
if (GNUNET_OK !=
|
|
GNUNET_CRYPTO_ecdsa_verify (TALER_SIGNATURE_WALLET_COIN_DEPOSIT,
|
|
&dr.purpose,
|
|
&deposit->csig.ecdsa_signature,
|
|
&deposit->coin.coin_pub.ecdsa_pub))
|
|
{
|
|
TALER_LOG_WARNING ("Invalid signature on /deposit request\n");
|
|
return TMH_RESPONSE_reply_arg_invalid (connection,
|
|
"csig");
|
|
}
|
|
/* check denomination exists and is valid */
|
|
key_state = TMH_KS_acquire ();
|
|
dki = TMH_KS_denomination_key_lookup (key_state,
|
|
&deposit->coin.denom_pub);
|
|
if (NULL == dki)
|
|
{
|
|
TMH_KS_release (key_state);
|
|
TALER_LOG_WARNING ("Unknown denomination key in /deposit request\n");
|
|
return TMH_RESPONSE_reply_arg_invalid (connection,
|
|
"denom_pub");
|
|
}
|
|
/* check coin signature */
|
|
if (GNUNET_YES !=
|
|
TALER_test_coin_valid (&deposit->coin))
|
|
{
|
|
TALER_LOG_WARNING ("Invalid coin passed for /deposit\n");
|
|
TMH_KS_release (key_state);
|
|
return TMH_RESPONSE_reply_coin_invalid (connection);
|
|
}
|
|
TALER_amount_ntoh (&fee_deposit,
|
|
&dki->issue.fee_deposit);
|
|
if (TALER_amount_cmp (&fee_deposit,
|
|
&deposit->amount_with_fee) < 0)
|
|
{
|
|
TMH_KS_release (key_state);
|
|
return (MHD_YES ==
|
|
TMH_RESPONSE_reply_external_error (connection,
|
|
"deposited amount smaller than depositing fee"))
|
|
? GNUNET_NO : GNUNET_SYSERR;
|
|
}
|
|
TMH_KS_release (key_state);
|
|
|
|
return TMH_DB_execute_deposit (connection,
|
|
deposit);
|
|
}
|
|
|
|
|
|
/**
|
|
* Handle a "/deposit" request. This function parses the
|
|
* JSON information and then calls #verify_and_execute_deposit()
|
|
* to verify the signatures and execute the deposit.
|
|
*
|
|
* @param connection the MHD connection to handle
|
|
* @param root root of the posted JSON
|
|
* @param amount how much should be deposited
|
|
* @param wire json describing the wire details (?)
|
|
* @return MHD result code
|
|
*/
|
|
static int
|
|
parse_and_handle_deposit_request (struct MHD_Connection *connection,
|
|
const json_t *root,
|
|
const struct TALER_Amount *amount,
|
|
json_t *wire)
|
|
{
|
|
int res;
|
|
struct TALER_MINTDB_Deposit deposit;
|
|
char *wire_enc;
|
|
size_t len;
|
|
struct TALER_MINTDB_DenominationKeyIssueInformation *dki;
|
|
struct TMH_KS_StateHandle *ks;
|
|
struct TMH_PARSE_FieldSpecification spec[] = {
|
|
TMH_PARSE_MEMBER_DENOMINATION_PUBLIC_KEY ("denom_pub", &deposit.coin.denom_pub),
|
|
TMH_PARSE_MEMBER_DENOMINATION_SIGNATURE ("ubsig", &deposit.coin.denom_sig),
|
|
TMH_PARSE_MEMBER_FIXED ("coin_pub", &deposit.coin.coin_pub),
|
|
TMH_PARSE_MEMBER_FIXED ("merchant_pub", &deposit.merchant_pub),
|
|
TMH_PARSE_MEMBER_FIXED ("H_a", &deposit.h_contract),
|
|
TMH_PARSE_MEMBER_FIXED ("H_wire", &deposit.h_wire),
|
|
TMH_PARSE_MEMBER_FIXED ("csig", &deposit.csig),
|
|
TMH_PARSE_MEMBER_FIXED ("transaction_id", &deposit.transaction_id),
|
|
TMH_PARSE_MEMBER_TIME_ABS ("timestamp", &deposit.timestamp),
|
|
TMH_PARSE_MEMBER_TIME_ABS ("refund_deadline", &deposit.refund_deadline),
|
|
TMH_PARSE_MEMBER_END
|
|
};
|
|
|
|
memset (&deposit, 0, sizeof (deposit));
|
|
res = TMH_PARSE_json_data (connection,
|
|
root,
|
|
spec);
|
|
if (GNUNET_SYSERR == res)
|
|
return MHD_NO; /* hard failure */
|
|
if (GNUNET_NO == res)
|
|
return MHD_YES; /* failure */
|
|
if (GNUNET_YES !=
|
|
TALER_json_validate_wireformat (TMH_expected_wire_format,
|
|
wire))
|
|
{
|
|
TMH_PARSE_release_data (spec);
|
|
return TMH_RESPONSE_reply_arg_invalid (connection,
|
|
"wire");
|
|
}
|
|
if (NULL == (wire_enc = json_dumps (wire, JSON_COMPACT | JSON_SORT_KEYS)))
|
|
{
|
|
TALER_LOG_WARNING ("Failed to parse JSON wire format specification for /deposit request\n");
|
|
TMH_PARSE_release_data (spec);
|
|
return TMH_RESPONSE_reply_arg_invalid (connection,
|
|
"wire");
|
|
}
|
|
len = strlen (wire_enc) + 1;
|
|
GNUNET_CRYPTO_hash (wire_enc,
|
|
len,
|
|
&deposit.h_wire);
|
|
GNUNET_free (wire_enc);
|
|
ks = TMH_KS_acquire ();
|
|
dki = TMH_KS_denomination_key_lookup (ks,
|
|
&deposit.coin.denom_pub);
|
|
if (NULL == dki)
|
|
{
|
|
TMH_KS_release (ks);
|
|
TMH_PARSE_release_data (spec);
|
|
return TMH_RESPONSE_reply_arg_invalid (connection,
|
|
"denom_pub");
|
|
}
|
|
TALER_amount_ntoh (&deposit.deposit_fee,
|
|
&dki->issue.fee_deposit);
|
|
TMH_KS_release (ks);
|
|
deposit.wire = wire;
|
|
deposit.amount_with_fee = *amount;
|
|
if (-1 == TALER_amount_cmp (&deposit.amount_with_fee,
|
|
&deposit.deposit_fee))
|
|
{
|
|
/* Total amount smaller than fee, invalid */
|
|
TMH_PARSE_release_data (spec);
|
|
return TMH_RESPONSE_reply_arg_invalid (connection,
|
|
"f");
|
|
}
|
|
res = verify_and_execute_deposit (connection,
|
|
&deposit);
|
|
TMH_PARSE_release_data (spec);
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* Handle a "/deposit" request. Parses the JSON in the post to find
|
|
* the "type" (either DIRECT_DEPOSIT or INCREMENTAL_DEPOSIT), and, if
|
|
* successful, passes the JSON data to
|
|
* #parse_and_handle_deposit_request() to further check the details
|
|
* of the operation specified in the "wire" field of the JSON data.
|
|
* If everything checks out, this will ultimately lead to the
|
|
* "/deposit" being executed, or rejected.
|
|
*
|
|
* @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_DEPOSIT_handler_deposit (struct TMH_RequestHandler *rh,
|
|
struct MHD_Connection *connection,
|
|
void **connection_cls,
|
|
const char *upload_data,
|
|
size_t *upload_data_size)
|
|
{
|
|
json_t *json;
|
|
json_t *wire;
|
|
int res;
|
|
struct TALER_Amount amount;
|
|
json_t *f;
|
|
|
|
res = TMH_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;
|
|
if (-1 == json_unpack (json,
|
|
"{s:s, s:o, f:o}",
|
|
"wire", &wire,
|
|
"f", &f))
|
|
{
|
|
GNUNET_break_op (0);
|
|
json_decref (json);
|
|
return TMH_RESPONSE_reply_json_pack (connection,
|
|
MHD_HTTP_BAD_REQUEST,
|
|
"{s:s}",
|
|
"error", "Bad format");
|
|
}
|
|
res = TMH_PARSE_amount_json (connection,
|
|
f,
|
|
&amount);
|
|
json_decref (f);
|
|
if (GNUNET_SYSERR == res)
|
|
{
|
|
json_decref (wire);
|
|
json_decref (json);
|
|
return MHD_NO;
|
|
}
|
|
if (GNUNET_NO == res)
|
|
{
|
|
json_decref (wire);
|
|
json_decref (json);
|
|
return MHD_YES;
|
|
}
|
|
res = parse_and_handle_deposit_request (connection,
|
|
json,
|
|
&amount,
|
|
wire);
|
|
json_decref (wire);
|
|
json_decref (json);
|
|
return res;
|
|
}
|
|
|
|
|
|
/* end of taler-mint-httpd_deposit.c */
|