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/*
This file is part of TALER
(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:
* - actually verify coin signature
* - revisit `struct Deposit` parsing once the struct
* has been finalized
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include <libpq-fe.h>
#include <pthread.h>
#include "mint.h"
#include "mint_db.h"
#include "taler_signatures.h"
#include "taler_json_lib.h"
#include "taler-mint-httpd_parsing.h"
#include "taler-mint-httpd_keys.h"
#include "taler-mint-httpd_db.h"
#include "taler-mint-httpd_deposit.h"
#include "taler-mint-httpd_responses.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 Deposit *deposit)
{
struct MintKeyState *key_state;
struct TALER_CoinPublicInfo coin_info;
memcpy (&coin_info.coin_pub,
&deposit->coin_pub,
sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
coin_info.denom_pub = deposit->denom_pub;
coin_info.denom_sig = deposit->ubsig;
key_state = TALER_MINT_key_state_acquire ();
if (GNUNET_YES !=
TALER_MINT_test_coin_valid (key_state,
&coin_info))
{
TALER_MINT_key_state_release (key_state);
return TALER_MINT_reply_json_pack (connection,
MHD_HTTP_NOT_FOUND,
"{s:s}",
"error", "Coin is not valid");
}
TALER_MINT_key_state_release (key_state);
/* FIXME: verify coin signature! */
/*
if (GNUNET_OK != GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_DEPOSIT,
&deposit->purpose,
&deposit->coin_sig,
&deposit->coin_pub))
{
resp = json_pack ("{s:s}", "error", "Signature verfication failed");
resp_code = MHD_HTTP_NOT_FOUND;
goto EXITIF_exit;
}
*/
return TALER_MINT_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 data and execute the deposit.
*
* @param connection the MHD connection to handle
* @param root root of the posted JSON
* @param purpose is this a #TALER_SIGNATURE_DEPOSIT or
* #TALER_SIGNATURE_INCREMENTAL_DEPOSIT
* @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,
uint32_t purpose,
const json_t *wire)
{
struct Deposit *deposit;
char *wire_enc;
size_t len;
int res;
// FIXME: `struct Deposit` is clearly ill-defined, we should
// not have to do this...
if (NULL == (wire_enc = json_dumps (wire, JSON_COMPACT | JSON_SORT_KEYS)))
{
GNUNET_break_op (0);
return TALER_MINT_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s}",
"error", "Bad format");
}
len = strlen (wire_enc) + 1;
GNUNET_free (wire_enc);
deposit = GNUNET_malloc (sizeof (struct Deposit) + len);
{
struct GNUNET_MINT_ParseFieldSpec spec[] =
{
TALER_MINT_PARSE_FIXED ("coin_pub", &deposit->coin_pub),
TALER_MINT_PARSE_FIXED ("denom_pub", &deposit->denom_pub),
TALER_MINT_PARSE_FIXED ("ubsig", &deposit->ubsig),
TALER_MINT_PARSE_FIXED ("merchant_pub", &deposit->merchant_pub),
TALER_MINT_PARSE_FIXED ("H_a", &deposit->h_contract),
TALER_MINT_PARSE_FIXED ("H_wire", &deposit->h_wire),
TALER_MINT_PARSE_FIXED ("csig", &deposit->coin_sig),
TALER_MINT_PARSE_FIXED ("transaction_id", &deposit->transaction_id),
TALER_MINT_PARSE_END
};
res = TALER_MINT_parse_json_data (connection,
wire, /* FIXME: wire or root here? */
spec);
if (GNUNET_SYSERR == res)
return MHD_NO; /* hard failure */
if (GNUNET_NO == res)
return MHD_YES; /* failure */
deposit->purpose.purpose = htonl (purpose);
deposit->purpose.size = htonl (sizeof (struct Deposit)
- offsetof (struct Deposit, purpose));
res = verify_and_execute_deposit (connection,
deposit);
TALER_MINT_release_parsed_data (spec);
}
GNUNET_free (deposit);
return res;
}
/**
* Handle a "/deposit" request. Parses the JSON in the post and, if
* successful, passes the JSON data to
* #parse_and_handle_deposit_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
TALER_MINT_handler_deposit (struct RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
json_t *json;
json_t *wire;
const char *deposit_type;
int res;
uint32_t purpose;
res = TALER_MINT_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}",
"type", &deposit_type,
"wire", &wire))
{
GNUNET_break_op (0);
return TALER_MINT_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s}",
"error", "Bad format");
}
if (0 == strcmp ("DIRECT_DEPOSIT", deposit_type))
purpose = TALER_SIGNATURE_DEPOSIT;
else if (0 == strcmp ("INCREMENTAL_DEPOSIT", deposit_type))
purpose = TALER_SIGNATURE_INCREMENTAL_DEPOSIT;
else
{
GNUNET_break_op (0);
json_decref (wire);
return TALER_MINT_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s}",
"error", "Bad format");
}
res = parse_and_handle_deposit_request (connection,
json,
purpose,
wire);
json_decref (wire);
return res;
}
/* end of taler-mint-httpd_deposit.c */
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