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author | Christian Grothoff <christian@grothoff.org> | 2019-01-11 21:27:34 +0100 |
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committer | Christian Grothoff <christian@grothoff.org> | 2019-01-11 21:43:15 +0100 |
commit | 54fc83ee6b910d482948c6ec8185df7aab1b0cb1 (patch) | |
tree | 10c04cad1392659a9ccef469271f866e393ebb48 /src/exchange-lib/exchange_api_track_transaction.c | |
parent | 57ab9f9fdba607fcc3817adf58f37c5390f8d220 (diff) | |
download | exchange-54fc83ee6b910d482948c6ec8185df7aab1b0cb1.tar.xz |
fix cyclic dependency by combining exchange-lib and auditor-lib directories
Diffstat (limited to 'src/exchange-lib/exchange_api_track_transaction.c')
-rw-r--r-- | src/exchange-lib/exchange_api_track_transaction.c | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/src/exchange-lib/exchange_api_track_transaction.c b/src/exchange-lib/exchange_api_track_transaction.c deleted file mode 100644 index d61344e59..000000000 --- a/src/exchange-lib/exchange_api_track_transaction.c +++ /dev/null @@ -1,367 +0,0 @@ -/* - This file is part of TALER - Copyright (C) 2014, 2015, 2016 GNUnet e.V. - - TALER is free software; you can redistribute it and/or modify it under the - terms of the GNU 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 General Public License for more details. - - You should have received a copy of the GNU General Public License along with - TALER; see the file COPYING. If not, see - <http://www.gnu.org/licenses/> -*/ -/** - * @file exchange-lib/exchange_api_track_transaction.c - * @brief Implementation of the /track/transaction request of the exchange's HTTP API - * @author Christian Grothoff - */ -#include "platform.h" -#include <jansson.h> -#include <microhttpd.h> /* just for HTTP status codes */ -#include <gnunet/gnunet_util_lib.h> -#include <gnunet/gnunet_json_lib.h> -#include <gnunet/gnunet_curl_lib.h> -#include "taler_json_lib.h" -#include "taler_exchange_service.h" -#include "exchange_api_handle.h" -#include "taler_signatures.h" -#include "curl_defaults.h" - - -/** - * @brief A Deposit Wtid Handle - */ -struct TALER_EXCHANGE_TrackTransactionHandle -{ - - /** - * The connection to exchange this request handle will use - */ - struct TALER_EXCHANGE_Handle *exchange; - - /** - * The url for this request. - */ - char *url; - - /** - * JSON encoding of the request to POST. - */ - char *json_enc; - - /** - * Handle for the request. - */ - struct GNUNET_CURL_Job *job; - - /** - * Function to call with the result. - */ - TALER_EXCHANGE_TrackTransactionCallback cb; - - /** - * Closure for @a cb. - */ - void *cb_cls; - - /** - * Information the exchange should sign in response. - * (with pre-filled fields from the request). - */ - struct TALER_ConfirmWirePS depconf; - -}; - - -/** - * Verify that the signature on the "200 OK" response - * from the exchange is valid. - * - * @param dwh deposit wtid handle - * @param json json reply with the signature - * @param[out] exchange_pub set to the exchange's public key - * @return #GNUNET_OK if the signature is valid, #GNUNET_SYSERR if not - */ -static int -verify_deposit_wtid_signature_ok (const struct TALER_EXCHANGE_TrackTransactionHandle *dwh, - const json_t *json, - struct TALER_ExchangePublicKeyP *exchange_pub) -{ - struct TALER_ExchangeSignatureP exchange_sig; - const struct TALER_EXCHANGE_Keys *key_state; - struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_fixed_auto ("exchange_sig", &exchange_sig), - GNUNET_JSON_spec_fixed_auto ("exchange_pub", exchange_pub), - GNUNET_JSON_spec_end() - }; - - if (GNUNET_OK != - GNUNET_JSON_parse (json, - spec, - NULL, NULL)) - { - GNUNET_break_op (0); - return GNUNET_SYSERR; - } - key_state = TALER_EXCHANGE_get_keys (dwh->exchange); - if (GNUNET_OK != - TALER_EXCHANGE_test_signing_key (key_state, - exchange_pub)) - { - GNUNET_break_op (0); - return GNUNET_SYSERR; - } - if (GNUNET_OK != - GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE, - &dwh->depconf.purpose, - &exchange_sig.eddsa_signature, - &exchange_pub->eddsa_pub)) - { - GNUNET_break_op (0); - return GNUNET_SYSERR; - } - return GNUNET_OK; -} - - -/** - * Function called when we're done processing the - * HTTP /track/transaction request. - * - * @param cls the `struct TALER_EXCHANGE_TrackTransactionHandle` - * @param response_code HTTP response code, 0 on error - * @param response parsed JSON result, NULL on error - */ -static void -handle_deposit_wtid_finished (void *cls, - long response_code, - const void *response) -{ - struct TALER_EXCHANGE_TrackTransactionHandle *dwh = cls; - const struct TALER_WireTransferIdentifierRawP *wtid = NULL; - struct GNUNET_TIME_Absolute execution_time = GNUNET_TIME_UNIT_FOREVER_ABS; - const struct TALER_Amount *coin_contribution = NULL; - struct TALER_Amount coin_contribution_s; - struct TALER_ExchangePublicKeyP exchange_pub; - struct TALER_ExchangePublicKeyP *ep = NULL; - const json_t *j = response; - - dwh->job = NULL; - switch (response_code) - { - case 0: - break; - case MHD_HTTP_OK: - { - struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_fixed_auto ("wtid", &dwh->depconf.wtid), - GNUNET_JSON_spec_absolute_time ("execution_time", &execution_time), - TALER_JSON_spec_amount ("coin_contribution", &coin_contribution_s), - GNUNET_JSON_spec_end() - }; - - if (GNUNET_OK != - GNUNET_JSON_parse (j, - spec, - NULL, NULL)) - { - GNUNET_break_op (0); - response_code = 0; - break; - } - wtid = &dwh->depconf.wtid; - dwh->depconf.execution_time = GNUNET_TIME_absolute_hton (execution_time); - TALER_amount_hton (&dwh->depconf.coin_contribution, - &coin_contribution_s); - coin_contribution = &coin_contribution_s; - if (GNUNET_OK != - verify_deposit_wtid_signature_ok (dwh, - j, - &exchange_pub)) - { - GNUNET_break_op (0); - response_code = 0; - } - else - { - ep = &exchange_pub; - } - } - break; - case MHD_HTTP_ACCEPTED: - { - /* Transaction known, but not executed yet */ - struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_absolute_time ("execution_time", &execution_time), - GNUNET_JSON_spec_end() - }; - - if (GNUNET_OK != - GNUNET_JSON_parse (j, - spec, - NULL, NULL)) - { - GNUNET_break_op (0); - response_code = 0; - break; - } - } - break; - case MHD_HTTP_BAD_REQUEST: - /* This should never happen, either us or the exchange is buggy - (or API version conflict); just pass JSON reply to the application */ - break; - case MHD_HTTP_UNAUTHORIZED: - /* Nothing really to verify, exchange says one of the signatures is - invalid; as we checked them, this should never happen, we - should pass the JSON reply to the application */ - break; - case MHD_HTTP_NOT_FOUND: - /* Exchange does not know about transaction; - we should pass the reply to the application */ - break; - case MHD_HTTP_INTERNAL_SERVER_ERROR: - /* Server had an internal issue; we should retry, but this API - leaves this to the application */ - break; - default: - /* unexpected response code */ - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "Unexpected response code %u\n", - (unsigned int) response_code); - GNUNET_break (0); - response_code = 0; - break; - } - dwh->cb (dwh->cb_cls, - response_code, - TALER_JSON_get_error_code (j), - ep, - j, - wtid, - execution_time, - coin_contribution); - TALER_EXCHANGE_track_transaction_cancel (dwh); -} - - -/** - * Obtain wire transfer details about an existing deposit operation. - * - * @param exchange the exchange to query - * @param merchant_priv the merchant's private key - * @param h_wire hash of merchant's wire transfer details - * @param h_contract_terms hash of the proposal data from the contract - * between merchant and customer - * @param coin_pub public key of the coin - * @param cb function to call with the result - * @param cb_cls closure for @a cb - * @return handle to abort request - */ -struct TALER_EXCHANGE_TrackTransactionHandle * -TALER_EXCHANGE_track_transaction (struct TALER_EXCHANGE_Handle *exchange, - const struct TALER_MerchantPrivateKeyP *merchant_priv, - const struct GNUNET_HashCode *h_wire, - const struct GNUNET_HashCode *h_contract_terms, - const struct TALER_CoinSpendPublicKeyP *coin_pub, - TALER_EXCHANGE_TrackTransactionCallback cb, - void *cb_cls) -{ - struct TALER_DepositTrackPS dtp; - struct TALER_MerchantSignatureP merchant_sig; - struct TALER_EXCHANGE_TrackTransactionHandle *dwh; - struct GNUNET_CURL_Context *ctx; - json_t *deposit_wtid_obj; - CURL *eh; - - if (GNUNET_YES != - TEAH_handle_is_ready (exchange)) - { - GNUNET_break (0); - return NULL; - } - dtp.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION); - dtp.purpose.size = htonl (sizeof (dtp)); - dtp.h_contract_terms = *h_contract_terms; - dtp.h_wire = *h_wire; - GNUNET_CRYPTO_eddsa_key_get_public (&merchant_priv->eddsa_priv, - &dtp.merchant.eddsa_pub); - - dtp.coin_pub = *coin_pub; - GNUNET_assert (GNUNET_OK == - GNUNET_CRYPTO_eddsa_sign (&merchant_priv->eddsa_priv, - &dtp.purpose, - &merchant_sig.eddsa_sig)); - deposit_wtid_obj = json_pack ("{s:o, s:o," /* H_wire, h_contract_terms */ - " s:o," /* coin_pub */ - " s:o, s:o}", /* merchant_pub, merchant_sig */ - "H_wire", GNUNET_JSON_from_data_auto (h_wire), - "h_contract_terms", GNUNET_JSON_from_data_auto (h_contract_terms), - "coin_pub", GNUNET_JSON_from_data_auto (coin_pub), - "merchant_pub", GNUNET_JSON_from_data_auto (&dtp.merchant), - "merchant_sig", GNUNET_JSON_from_data_auto (&merchant_sig)); - if (NULL == deposit_wtid_obj) - { - GNUNET_break (0); - return NULL; - } - - dwh = GNUNET_new (struct TALER_EXCHANGE_TrackTransactionHandle); - dwh->exchange = exchange; - dwh->cb = cb; - dwh->cb_cls = cb_cls; - dwh->url = TEAH_path_to_url (exchange, "/track/transaction"); - dwh->depconf.purpose.size = htonl (sizeof (struct TALER_ConfirmWirePS)); - dwh->depconf.purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE); - dwh->depconf.h_wire = *h_wire; - dwh->depconf.h_contract_terms = *h_contract_terms; - dwh->depconf.coin_pub = *coin_pub; - - eh = TEL_curl_easy_get (dwh->url); - GNUNET_assert (NULL != (dwh->json_enc = - json_dumps (deposit_wtid_obj, - JSON_COMPACT))); - json_decref (deposit_wtid_obj); - GNUNET_assert (CURLE_OK == - curl_easy_setopt (eh, - CURLOPT_POSTFIELDS, - dwh->json_enc)); - GNUNET_assert (CURLE_OK == - curl_easy_setopt (eh, - CURLOPT_POSTFIELDSIZE, - strlen (dwh->json_enc))); - ctx = TEAH_handle_to_context (exchange); - dwh->job = GNUNET_CURL_job_add (ctx, - eh, - GNUNET_YES, - &handle_deposit_wtid_finished, - dwh); - return dwh; -} - - -/** - * Cancel deposit wtid request. This function cannot be used on a request - * handle if a response is already served for it. - * - * @param dwh the wire deposits request handle - */ -void -TALER_EXCHANGE_track_transaction_cancel (struct TALER_EXCHANGE_TrackTransactionHandle *dwh) -{ - if (NULL != dwh->job) - { - GNUNET_CURL_job_cancel (dwh->job); - dwh->job = NULL; - } - GNUNET_free (dwh->url); - GNUNET_free (dwh->json_enc); - GNUNET_free (dwh); -} - - -/* end of exchange_api_deposit_wtid.c */ |