diff options
Diffstat (limited to 'src/exchange/taler-exchange-httpd_reserve.c')
| -rw-r--r-- | src/exchange/taler-exchange-httpd_reserve.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/exchange/taler-exchange-httpd_reserve.c b/src/exchange/taler-exchange-httpd_reserve.c new file mode 100644 index 000000000..45f073107 --- /dev/null +++ b/src/exchange/taler-exchange-httpd_reserve.c @@ -0,0 +1,186 @@ +/* + 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-exchange-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-exchange-httpd_reserve.h" +#include "taler-exchange-httpd_parsing.h" +#include "taler-exchange-httpd_responses.h" +#include "taler-exchange-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_EXCHANGEDB_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); + TMH_KS_release (ks); + 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-exchange-httpd_reserve.c */ |