2015-08-06 00:00:40 +02:00
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/*
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This file is part of TALER
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2020-02-26 22:24:22 +01:00
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Copyright (C) 2015-2020 Taler Systems SA
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2015-08-06 00:00:40 +02:00
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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2016-07-07 17:55:25 +02:00
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TALER; see the file COPYING. If not, see
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2015-08-06 00:00:40 +02:00
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<http://www.gnu.org/licenses/>
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*/
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/**
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2020-02-29 16:42:10 +01:00
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* @file lib/exchange_api_link.c
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* @brief Implementation of the /coins/$COIN_PUB/link request
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2015-08-06 00:00:40 +02:00
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <microhttpd.h> /* just for HTTP status codes */
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#include <gnunet/gnunet_util_lib.h>
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2016-04-17 17:45:15 +02:00
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#include <gnunet/gnunet_curl_lib.h>
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2016-03-01 15:35:04 +01:00
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#include "taler_exchange_service.h"
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2016-03-19 15:54:21 +01:00
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#include "taler_json_lib.h"
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2016-03-01 15:35:04 +01:00
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#include "exchange_api_handle.h"
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2015-08-06 00:00:40 +02:00
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#include "taler_signatures.h"
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2019-01-11 21:27:34 +01:00
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#include "exchange_api_curl_defaults.h"
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2015-08-06 00:00:40 +02:00
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/**
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2020-02-29 16:42:10 +01:00
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* @brief A /coins/$COIN_PUB/link Handle
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2015-08-06 00:00:40 +02:00
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*/
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2020-02-29 16:42:10 +01:00
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struct TALER_EXCHANGE_LinkHandle
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2015-08-06 00:00:40 +02:00
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{
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/**
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2016-03-01 15:35:04 +01:00
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* The connection to exchange this request handle will use
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2015-08-06 00:00:40 +02:00
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*/
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2016-03-01 15:35:04 +01:00
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struct TALER_EXCHANGE_Handle *exchange;
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2015-08-06 00:00:40 +02:00
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/**
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* The url for this request.
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*/
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char *url;
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/**
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* Handle for the request.
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*/
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2016-04-17 17:45:15 +02:00
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struct GNUNET_CURL_Job *job;
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2015-08-06 00:00:40 +02:00
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/**
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* Function to call with the result.
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*/
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2020-02-29 16:42:10 +01:00
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TALER_EXCHANGE_LinkCallback link_cb;
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2015-08-06 00:00:40 +02:00
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/**
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* Closure for @e cb.
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*/
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void *link_cb_cls;
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2015-08-08 23:03:26 +02:00
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/**
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* Private key of the coin, required to decode link information.
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*/
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struct TALER_CoinSpendPrivateKeyP coin_priv;
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2015-08-06 00:00:40 +02:00
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};
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2015-08-08 23:03:26 +02:00
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/**
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* Parse the provided linkage data from the "200 OK" response
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* for one of the coins.
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*
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2020-02-29 16:42:10 +01:00
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* @param lh link handle
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2015-08-08 23:03:26 +02:00
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* @param json json reply with the data for one coin
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2016-08-05 16:08:19 +02:00
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* @param coin_num number of the coin to decode
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2015-08-08 23:03:26 +02:00
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* @param trans_pub our transfer public key
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* @param[out] coin_priv where to return private coin key
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* @param[out] sig where to return private coin signature
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* @param[out] pub where to return the public key for the coin
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
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*/
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static int
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2020-02-29 16:42:10 +01:00
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parse_link_coin (const struct TALER_EXCHANGE_LinkHandle *lh,
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const json_t *json,
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unsigned int coin_num,
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const struct TALER_TransferPublicKeyP *trans_pub,
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struct TALER_CoinSpendPrivateKeyP *coin_priv,
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struct TALER_DenominationSignature *sig,
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struct TALER_DenominationPublicKey *pub)
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2015-08-08 23:03:26 +02:00
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{
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2016-03-21 14:40:57 +01:00
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struct GNUNET_CRYPTO_RsaSignature *bsig;
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struct GNUNET_CRYPTO_RsaPublicKey *rpub;
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2019-06-26 16:13:17 +02:00
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struct TALER_CoinSpendSignatureP link_sig;
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2016-03-19 15:54:21 +01:00
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struct GNUNET_JSON_Specification spec[] = {
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GNUNET_JSON_spec_rsa_public_key ("denom_pub", &rpub),
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GNUNET_JSON_spec_rsa_signature ("ev_sig", &bsig),
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2019-06-26 16:13:17 +02:00
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GNUNET_JSON_spec_fixed_auto ("link_sig", &link_sig),
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2019-08-25 16:18:24 +02:00
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GNUNET_JSON_spec_end ()
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2015-08-08 23:03:26 +02:00
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};
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2016-08-05 16:08:19 +02:00
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struct TALER_TransferSecretP secret;
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2017-10-31 12:38:14 +01:00
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struct TALER_PlanchetSecretsP fc;
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2016-08-05 16:08:19 +02:00
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2015-08-08 23:03:26 +02:00
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/* parse reply */
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if (GNUNET_OK !=
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2016-03-19 15:54:21 +01:00
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GNUNET_JSON_parse (json,
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spec,
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NULL, NULL))
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2015-08-08 23:03:26 +02:00
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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2016-08-05 16:08:19 +02:00
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TALER_link_recover_transfer_secret (trans_pub,
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2020-02-29 16:42:10 +01:00
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&lh->coin_priv,
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2016-08-05 16:08:19 +02:00
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&secret);
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2017-10-31 12:44:17 +01:00
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TALER_planchet_setup_refresh (&secret,
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2019-06-26 16:13:17 +02:00
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coin_num,
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&fc);
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2015-08-08 23:03:26 +02:00
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/* extract coin and signature */
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2016-08-05 16:08:19 +02:00
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*coin_priv = fc.coin_priv;
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2015-08-08 23:03:26 +02:00
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sig->rsa_signature
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2020-12-04 12:09:27 +01:00
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= TALER_rsa_unblind (bsig,
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&fc.blinding_key.bks,
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rpub);
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2019-06-26 16:13:17 +02:00
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/* verify link_sig */
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{
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struct TALER_PlanchetDetail pd;
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2020-04-12 16:44:28 +02:00
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struct GNUNET_HashCode c_hash;
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struct TALER_LinkDataPS ldp = {
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.purpose.size = htonl (sizeof (ldp)),
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.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_LINK),
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.transfer_pub = *trans_pub
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};
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2019-06-26 16:13:17 +02:00
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2020-02-29 16:42:10 +01:00
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GNUNET_CRYPTO_eddsa_key_get_public (&lh->coin_priv.eddsa_priv,
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2019-06-26 16:13:17 +02:00
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&ldp.old_coin_pub.eddsa_pub);
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pub->rsa_public_key = rpub;
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if (GNUNET_OK !=
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TALER_planchet_prepare (pub,
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&fc,
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2020-04-12 16:44:28 +02:00
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&c_hash,
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2019-06-26 16:13:17 +02:00
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&pd))
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{
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GNUNET_break (0);
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GNUNET_JSON_parse_free (spec);
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return GNUNET_SYSERR;
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}
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ldp.h_denom_pub = pd.denom_pub_hash;
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GNUNET_CRYPTO_hash (pd.coin_ev,
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pd.coin_ev_size,
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&ldp.coin_envelope_hash);
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GNUNET_free (pd.coin_ev);
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2019-08-25 16:18:24 +02:00
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2019-06-26 16:13:17 +02:00
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if (GNUNET_OK !=
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GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_LINK,
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2020-04-08 18:18:20 +02:00
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&ldp,
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2019-06-26 16:13:17 +02:00
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&link_sig.eddsa_signature,
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&ldp.old_coin_pub.eddsa_pub))
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{
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GNUNET_break_op (0);
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GNUNET_JSON_parse_free (spec);
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return GNUNET_SYSERR;
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}
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}
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2019-08-25 16:18:24 +02:00
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2015-08-08 23:03:26 +02:00
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/* clean up */
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2015-08-17 03:35:11 +02:00
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pub->rsa_public_key = GNUNET_CRYPTO_rsa_public_key_dup (rpub);
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2016-03-19 15:54:21 +01:00
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GNUNET_JSON_parse_free (spec);
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2015-08-08 23:03:26 +02:00
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return GNUNET_OK;
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}
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/**
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* Parse the provided linkage data from the "200 OK" response
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* for one of the coins.
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*
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2020-02-29 16:42:10 +01:00
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* @param[in,out] lh link handle (callback may be zero'ed out)
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2015-08-08 23:03:26 +02:00
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* @param json json reply with the data for one coin
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
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*/
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static int
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2020-02-29 16:42:10 +01:00
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parse_link_ok (struct TALER_EXCHANGE_LinkHandle *lh,
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const json_t *json)
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2015-08-08 23:03:26 +02:00
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{
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2015-08-17 03:24:10 +02:00
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unsigned int session;
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2015-08-08 23:03:26 +02:00
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unsigned int num_coins;
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int ret;
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2020-04-05 22:05:38 +02:00
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struct TALER_EXCHANGE_HttpResponse hr = {
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.reply = json,
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.http_status = MHD_HTTP_OK
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};
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2015-08-08 23:03:26 +02:00
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2015-08-17 03:24:10 +02:00
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if (! json_is_array (json))
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2015-08-08 23:03:26 +02:00
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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2015-08-17 03:24:10 +02:00
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num_coins = 0;
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2016-01-21 16:12:05 +01:00
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/* Theoretically, a coin may have been melted repeatedly
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into different sessions; so the response is an array
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which contains information by melting session. That
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array contains another array. However, our API returns
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a single 1d array, so we flatten the 2d array that is
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returned into a single array. Note that usually a coin
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is melted at most once, and so we'll only run this
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loop once for 'session=0' in most cases.
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num_coins tracks the size of the 1d array we return,
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2020-01-18 19:16:33 +01:00
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whilst 'i' and 'session' track the 2d array. *///
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for (session = 0; session<json_array_size (json); session++)
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2015-08-08 23:03:26 +02:00
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{
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2015-08-17 03:24:10 +02:00
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json_t *jsona;
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2016-03-19 15:54:21 +01:00
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struct GNUNET_JSON_Specification spec[] = {
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GNUNET_JSON_spec_json ("new_coins", &jsona),
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2019-08-25 16:18:24 +02:00
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GNUNET_JSON_spec_end ()
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2015-08-17 03:24:10 +02:00
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};
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if (GNUNET_OK !=
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2019-06-26 16:13:17 +02:00
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GNUNET_JSON_parse (json_array_get (json,
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2016-03-19 15:54:21 +01:00
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session),
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spec,
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NULL, NULL))
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2015-08-17 03:24:10 +02:00
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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if (! json_is_array (jsona))
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{
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GNUNET_break_op (0);
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2016-03-19 15:54:21 +01:00
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GNUNET_JSON_parse_free (spec);
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2015-08-17 03:24:10 +02:00
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return GNUNET_SYSERR;
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}
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/* count all coins over all sessions */
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num_coins += json_array_size (jsona);
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2016-03-19 15:54:21 +01:00
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GNUNET_JSON_parse_free (spec);
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2015-08-08 23:03:26 +02:00
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}
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2016-01-21 16:12:05 +01:00
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/* Now that we know how big the 1d array is, allocate
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and fill it. */
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2015-08-08 23:03:26 +02:00
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{
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2016-01-21 16:12:05 +01:00
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unsigned int off_coin; /* index into 1d array */
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2015-08-08 23:03:26 +02:00
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unsigned int i;
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2020-01-18 19:16:33 +01:00
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struct TALER_CoinSpendPrivateKeyP coin_privs[GNUNET_NZL (num_coins)];
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struct TALER_DenominationSignature sigs[GNUNET_NZL (num_coins)];
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struct TALER_DenominationPublicKey pubs[GNUNET_NZL (num_coins)];
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2016-01-20 16:21:32 +01:00
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2016-01-21 16:12:05 +01:00
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memset (sigs, 0, sizeof (sigs));
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memset (pubs, 0, sizeof (pubs));
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2015-08-17 03:24:10 +02:00
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off_coin = 0;
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2019-08-25 16:18:24 +02:00
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for (session = 0; session<json_array_size (json); session++)
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2015-08-08 23:03:26 +02:00
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{
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2015-08-17 03:24:10 +02:00
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json_t *jsona;
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struct TALER_TransferPublicKeyP trans_pub;
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2016-03-19 15:54:21 +01:00
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struct GNUNET_JSON_Specification spec[] = {
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2019-06-26 16:13:17 +02:00
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GNUNET_JSON_spec_json ("new_coins",
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2016-08-07 23:21:49 +02:00
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&jsona),
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2019-06-26 16:13:17 +02:00
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GNUNET_JSON_spec_fixed_auto ("transfer_pub",
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2016-08-07 23:21:49 +02:00
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&trans_pub),
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2019-08-25 16:18:24 +02:00
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GNUNET_JSON_spec_end ()
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2015-08-17 03:24:10 +02:00
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};
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2015-08-08 23:03:26 +02:00
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if (GNUNET_OK !=
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2019-06-26 16:13:17 +02:00
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GNUNET_JSON_parse (json_array_get (json,
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2016-03-19 15:54:21 +01:00
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session),
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spec,
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NULL, NULL))
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2015-08-08 23:03:26 +02:00
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{
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2019-06-26 16:13:17 +02:00
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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2015-08-08 23:03:26 +02:00
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}
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2015-08-17 03:24:10 +02:00
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if (! json_is_array (jsona))
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{
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2019-06-26 16:13:17 +02:00
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GNUNET_break_op (0);
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GNUNET_JSON_parse_free (spec);
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return GNUNET_SYSERR;
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2015-08-17 03:24:10 +02:00
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}
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2016-01-20 16:21:32 +01:00
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2015-08-17 03:24:10 +02:00
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/* decode all coins */
|
2019-08-25 16:18:24 +02:00
|
|
|
for (i = 0; i<json_array_size (jsona); i++)
|
2015-08-17 03:24:10 +02:00
|
|
|
{
|
2017-10-06 21:27:58 +02:00
|
|
|
GNUNET_assert (i + off_coin < num_coins);
|
2019-06-26 16:13:17 +02:00
|
|
|
if (GNUNET_OK !=
|
2020-02-29 16:42:10 +01:00
|
|
|
parse_link_coin (lh,
|
|
|
|
json_array_get (jsona,
|
|
|
|
i),
|
|
|
|
i,
|
|
|
|
&trans_pub,
|
|
|
|
&coin_privs[i + off_coin],
|
|
|
|
&sigs[i + off_coin],
|
|
|
|
&pubs[i + off_coin]))
|
2019-06-26 16:13:17 +02:00
|
|
|
{
|
|
|
|
GNUNET_break_op (0);
|
|
|
|
break;
|
|
|
|
}
|
2015-08-17 03:24:10 +02:00
|
|
|
}
|
|
|
|
/* check if we really got all, then invoke callback */
|
2016-01-21 16:12:05 +01:00
|
|
|
off_coin += i;
|
2015-08-17 03:24:10 +02:00
|
|
|
if (i != json_array_size (jsona))
|
|
|
|
{
|
2019-06-26 16:13:17 +02:00
|
|
|
GNUNET_break_op (0);
|
|
|
|
ret = GNUNET_SYSERR;
|
|
|
|
GNUNET_JSON_parse_free (spec);
|
|
|
|
break;
|
2015-08-17 03:24:10 +02:00
|
|
|
}
|
2016-03-19 15:54:21 +01:00
|
|
|
GNUNET_JSON_parse_free (spec);
|
2016-01-20 16:21:32 +01:00
|
|
|
} /* end of for (session) */
|
|
|
|
|
2015-08-17 03:24:10 +02:00
|
|
|
if (off_coin == num_coins)
|
2015-08-08 23:03:26 +02:00
|
|
|
{
|
2020-02-29 16:42:10 +01:00
|
|
|
lh->link_cb (lh->link_cb_cls,
|
2020-04-05 22:05:38 +02:00
|
|
|
&hr,
|
2020-02-29 16:42:10 +01:00
|
|
|
num_coins,
|
|
|
|
coin_privs,
|
|
|
|
sigs,
|
2020-04-05 22:05:38 +02:00
|
|
|
pubs);
|
2020-02-29 16:42:10 +01:00
|
|
|
lh->link_cb = NULL;
|
2015-08-08 23:03:26 +02:00
|
|
|
ret = GNUNET_OK;
|
|
|
|
}
|
2015-08-17 03:24:10 +02:00
|
|
|
else
|
|
|
|
{
|
|
|
|
GNUNET_break_op (0);
|
|
|
|
ret = GNUNET_SYSERR;
|
|
|
|
}
|
2015-08-08 23:03:26 +02:00
|
|
|
|
|
|
|
/* clean up */
|
2017-10-06 21:32:33 +02:00
|
|
|
GNUNET_assert (off_coin <= num_coins);
|
2019-08-25 16:18:24 +02:00
|
|
|
for (i = 0; i<off_coin; i++)
|
2016-01-21 16:12:05 +01:00
|
|
|
{
|
2015-08-08 23:03:26 +02:00
|
|
|
if (NULL != sigs[i].rsa_signature)
|
|
|
|
GNUNET_CRYPTO_rsa_signature_free (sigs[i].rsa_signature);
|
2016-01-21 16:12:05 +01:00
|
|
|
if (NULL != pubs[i].rsa_public_key)
|
|
|
|
GNUNET_CRYPTO_rsa_public_key_free (pubs[i].rsa_public_key);
|
|
|
|
}
|
2015-08-08 23:03:26 +02:00
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2015-08-06 00:00:40 +02:00
|
|
|
/**
|
|
|
|
* Function called when we're done processing the
|
2020-02-29 16:42:10 +01:00
|
|
|
* HTTP /coins/$COIN_PUB/link request.
|
2015-08-06 00:00:40 +02:00
|
|
|
*
|
2020-02-29 16:42:10 +01:00
|
|
|
* @param cls the `struct TALER_EXCHANGE_LinkHandle`
|
2016-04-17 17:45:15 +02:00
|
|
|
* @param response_code HTTP response code, 0 on error
|
2018-10-22 16:59:09 +02:00
|
|
|
* @param response parsed JSON result, NULL on error
|
2015-08-06 00:00:40 +02:00
|
|
|
*/
|
|
|
|
static void
|
2020-02-29 16:42:10 +01:00
|
|
|
handle_link_finished (void *cls,
|
|
|
|
long response_code,
|
|
|
|
const void *response)
|
2015-08-06 00:00:40 +02:00
|
|
|
{
|
2020-02-29 16:42:10 +01:00
|
|
|
struct TALER_EXCHANGE_LinkHandle *lh = cls;
|
2018-10-22 16:59:09 +02:00
|
|
|
const json_t *j = response;
|
2020-04-05 22:05:38 +02:00
|
|
|
struct TALER_EXCHANGE_HttpResponse hr = {
|
|
|
|
.reply = j,
|
|
|
|
.http_status = (unsigned int) response_code
|
|
|
|
};
|
2015-08-06 00:00:40 +02:00
|
|
|
|
2020-02-29 16:42:10 +01:00
|
|
|
lh->job = NULL;
|
2015-08-06 00:00:40 +02:00
|
|
|
switch (response_code)
|
|
|
|
{
|
|
|
|
case 0:
|
2020-11-07 18:51:14 +01:00
|
|
|
hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
|
2015-08-06 00:00:40 +02:00
|
|
|
break;
|
|
|
|
case MHD_HTTP_OK:
|
2015-08-08 23:03:26 +02:00
|
|
|
if (GNUNET_OK !=
|
2020-02-29 16:42:10 +01:00
|
|
|
parse_link_ok (lh,
|
|
|
|
j))
|
2015-08-08 23:03:26 +02:00
|
|
|
{
|
|
|
|
GNUNET_break_op (0);
|
2020-04-05 22:05:38 +02:00
|
|
|
hr.http_status = 0;
|
2020-11-07 18:51:14 +01:00
|
|
|
hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
|
2020-03-20 02:36:50 +01:00
|
|
|
break;
|
2015-08-08 23:03:26 +02:00
|
|
|
}
|
2020-03-20 02:36:50 +01:00
|
|
|
GNUNET_assert (NULL == lh->link_cb);
|
|
|
|
TALER_EXCHANGE_link_cancel (lh);
|
|
|
|
return;
|
2015-08-06 00:00:40 +02:00
|
|
|
case MHD_HTTP_BAD_REQUEST:
|
2020-04-05 22:05:38 +02:00
|
|
|
hr.ec = TALER_JSON_get_error_code (j);
|
|
|
|
hr.hint = TALER_JSON_get_error_hint (j);
|
2016-03-01 15:35:04 +01:00
|
|
|
/* This should never happen, either us or the exchange is buggy
|
2015-08-06 00:00:40 +02:00
|
|
|
(or API version conflict); just pass JSON reply to the application */
|
|
|
|
break;
|
|
|
|
case MHD_HTTP_NOT_FOUND:
|
2020-04-05 22:05:38 +02:00
|
|
|
hr.ec = TALER_JSON_get_error_code (j);
|
|
|
|
hr.hint = TALER_JSON_get_error_hint (j);
|
2016-03-01 15:35:04 +01:00
|
|
|
/* Nothing really to verify, exchange says this coin was not melted; we
|
2015-08-06 00:00:40 +02:00
|
|
|
should pass the JSON reply to the application */
|
|
|
|
break;
|
|
|
|
case MHD_HTTP_INTERNAL_SERVER_ERROR:
|
2020-04-05 22:05:38 +02:00
|
|
|
hr.ec = TALER_JSON_get_error_code (j);
|
|
|
|
hr.hint = TALER_JSON_get_error_hint (j);
|
2015-08-06 00:00:40 +02:00
|
|
|
/* Server had an internal issue; we should retry, but this API
|
|
|
|
leaves this to the application */
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* unexpected response code */
|
2020-04-05 22:05:38 +02:00
|
|
|
GNUNET_break_op (0);
|
|
|
|
hr.ec = TALER_JSON_get_error_code (j);
|
|
|
|
hr.hint = TALER_JSON_get_error_hint (j);
|
2015-08-06 00:00:40 +02:00
|
|
|
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
|
2020-04-05 22:05:38 +02:00
|
|
|
"Unexpected response code %u/%d\n",
|
|
|
|
(unsigned int) response_code,
|
|
|
|
(int) hr.ec);
|
2015-08-06 00:00:40 +02:00
|
|
|
break;
|
|
|
|
}
|
2020-02-29 16:42:10 +01:00
|
|
|
if (NULL != lh->link_cb)
|
|
|
|
lh->link_cb (lh->link_cb_cls,
|
2020-04-05 22:05:38 +02:00
|
|
|
&hr,
|
2020-02-29 16:42:10 +01:00
|
|
|
0,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
2020-04-05 22:05:38 +02:00
|
|
|
NULL);
|
2020-02-29 16:42:10 +01:00
|
|
|
TALER_EXCHANGE_link_cancel (lh);
|
2015-08-06 00:00:40 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
2016-03-01 15:35:04 +01:00
|
|
|
* Submit a link request to the exchange and get the exchange's response.
|
2015-08-06 00:00:40 +02:00
|
|
|
*
|
2020-02-29 16:42:10 +01:00
|
|
|
* This API is typically not used by anyone, it is more a threat against those
|
|
|
|
* trying to receive a funds transfer by abusing the refresh protocol.
|
2015-08-06 00:00:40 +02:00
|
|
|
*
|
2016-03-01 15:35:04 +01:00
|
|
|
* @param exchange the exchange handle; the exchange must be ready to operate
|
2015-08-06 00:00:40 +02:00
|
|
|
* @param coin_priv private key to request link data for
|
|
|
|
* @param link_cb the callback to call with the useful result of the
|
|
|
|
* refresh operation the @a coin_priv was involved in (if any)
|
|
|
|
* @param link_cb_cls closure for @a link_cb
|
|
|
|
* @return a handle for this request
|
|
|
|
*/
|
2020-02-29 16:42:10 +01:00
|
|
|
struct TALER_EXCHANGE_LinkHandle *
|
|
|
|
TALER_EXCHANGE_link (struct TALER_EXCHANGE_Handle *exchange,
|
|
|
|
const struct TALER_CoinSpendPrivateKeyP *coin_priv,
|
|
|
|
TALER_EXCHANGE_LinkCallback link_cb,
|
|
|
|
void *link_cb_cls)
|
2015-08-06 00:00:40 +02:00
|
|
|
{
|
2020-02-29 16:42:10 +01:00
|
|
|
struct TALER_EXCHANGE_LinkHandle *lh;
|
2015-08-06 00:00:40 +02:00
|
|
|
CURL *eh;
|
2016-04-17 17:45:15 +02:00
|
|
|
struct GNUNET_CURL_Context *ctx;
|
2015-08-08 23:03:26 +02:00
|
|
|
struct TALER_CoinSpendPublicKeyP coin_pub;
|
2020-02-26 22:24:22 +01:00
|
|
|
char arg_str[sizeof (struct TALER_CoinSpendPublicKeyP) * 2 + 32];
|
2015-08-06 00:00:40 +02:00
|
|
|
|
|
|
|
if (GNUNET_YES !=
|
2018-11-25 14:40:03 +01:00
|
|
|
TEAH_handle_is_ready (exchange))
|
2015-08-06 00:00:40 +02:00
|
|
|
{
|
|
|
|
GNUNET_break (0);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2015-08-08 23:03:26 +02:00
|
|
|
GNUNET_CRYPTO_eddsa_key_get_public (&coin_priv->eddsa_priv,
|
|
|
|
&coin_pub.eddsa_pub);
|
2020-02-26 22:24:22 +01:00
|
|
|
{
|
|
|
|
char pub_str[sizeof (struct TALER_CoinSpendPublicKeyP) * 2];
|
|
|
|
char *end;
|
|
|
|
|
|
|
|
end = GNUNET_STRINGS_data_to_string (&coin_pub,
|
|
|
|
sizeof (struct
|
|
|
|
TALER_CoinSpendPublicKeyP),
|
|
|
|
pub_str,
|
|
|
|
sizeof (pub_str));
|
|
|
|
*end = '\0';
|
|
|
|
GNUNET_snprintf (arg_str,
|
|
|
|
sizeof (arg_str),
|
|
|
|
"/coins/%s/link",
|
|
|
|
pub_str);
|
|
|
|
}
|
2020-02-29 16:42:10 +01:00
|
|
|
lh = GNUNET_new (struct TALER_EXCHANGE_LinkHandle);
|
|
|
|
lh->exchange = exchange;
|
|
|
|
lh->link_cb = link_cb;
|
|
|
|
lh->link_cb_cls = link_cb_cls;
|
|
|
|
lh->coin_priv = *coin_priv;
|
|
|
|
lh->url = TEAH_path_to_url (exchange,
|
|
|
|
arg_str);
|
2020-02-29 16:54:58 +01:00
|
|
|
eh = TALER_EXCHANGE_curl_easy_get_ (lh->url);
|
2020-03-03 17:14:00 +01:00
|
|
|
if (NULL == eh)
|
|
|
|
{
|
|
|
|
GNUNET_break (0);
|
|
|
|
GNUNET_free (lh->url);
|
|
|
|
GNUNET_free (lh);
|
|
|
|
return NULL;
|
|
|
|
}
|
2018-11-25 14:40:03 +01:00
|
|
|
ctx = TEAH_handle_to_context (exchange);
|
2020-07-16 20:36:51 +02:00
|
|
|
lh->job = GNUNET_CURL_job_add_with_ct_json (ctx,
|
|
|
|
eh,
|
|
|
|
&handle_link_finished,
|
|
|
|
lh);
|
2020-02-29 16:42:10 +01:00
|
|
|
return lh;
|
2015-08-06 00:00:40 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
2020-02-29 16:42:10 +01:00
|
|
|
* Cancel a link request. This function cannot be used
|
2015-08-06 00:00:40 +02:00
|
|
|
* on a request handle if the callback was already invoked.
|
|
|
|
*
|
2020-02-29 16:42:10 +01:00
|
|
|
* @param lh the link handle
|
2015-08-06 00:00:40 +02:00
|
|
|
*/
|
|
|
|
void
|
2020-02-29 16:42:10 +01:00
|
|
|
TALER_EXCHANGE_link_cancel (struct TALER_EXCHANGE_LinkHandle *lh)
|
2015-08-06 00:00:40 +02:00
|
|
|
{
|
2020-02-29 16:42:10 +01:00
|
|
|
if (NULL != lh->job)
|
2015-08-06 00:00:40 +02:00
|
|
|
{
|
2020-02-29 16:42:10 +01:00
|
|
|
GNUNET_CURL_job_cancel (lh->job);
|
|
|
|
lh->job = NULL;
|
2015-08-06 00:00:40 +02:00
|
|
|
}
|
2020-02-29 16:42:10 +01:00
|
|
|
GNUNET_free (lh->url);
|
|
|
|
GNUNET_free (lh);
|
2015-08-06 00:00:40 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2020-02-29 16:42:10 +01:00
|
|
|
/* end of exchange_api_link.c */
|