diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/Makefile.am | 1 | ||||
| -rw-r--r-- | src/lib/exchange_api_kyc_check.c | 215 |
2 files changed, 216 insertions, 0 deletions
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am index 22209de45..1a8ca6d28 100644 --- a/src/lib/Makefile.am +++ b/src/lib/Makefile.am @@ -27,6 +27,7 @@ libtalerexchange_la_SOURCES = \ exchange_api_handle.c exchange_api_handle.h \ exchange_api_deposit.c \ exchange_api_deposits_get.c \ + exchange_api_kyc_check.c \ exchange_api_link.c \ exchange_api_management_auditor_disable.c \ exchange_api_management_auditor_enable.c \ diff --git a/src/lib/exchange_api_kyc_check.c b/src/lib/exchange_api_kyc_check.c new file mode 100644 index 000000000..5b9d10164 --- /dev/null +++ b/src/lib/exchange_api_kyc_check.c @@ -0,0 +1,215 @@ +/* + This file is part of TALER + Copyright (C) 2021 Taler Systems SA + + 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 lib/exchange_api_kyc_check.c + * @brief Implementation of the /kyc-check request + * @author Christian Grothoff + */ +#include "platform.h" +#include <microhttpd.h> /* just for HTTP check codes */ +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_curl_lib.h> +#include "taler_exchange_service.h" +#include "taler_json_lib.h" +#include "exchange_api_handle.h" +#include "taler_signatures.h" +#include "exchange_api_curl_defaults.h" + + +/** + * @brief A ``/kyc-check`` handle + */ +struct TALER_EXCHANGE_KycCheckHandle +{ + + /** + * The connection to exchange this request handle will use + */ + struct TALER_EXCHANGE_Handle *exchange; + + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_EXCHANGE_KycStatusCallback cb; + + /** + * Closure for @e cb. + */ + void *cb_cls; + +}; + + +/** + * Function called when we're done processing the + * HTTP /kyc-check request. + * + * @param cls the `struct TALER_EXCHANGE_KycCheckHandle` + * @param response_code HTTP response code, 0 on error + * @param response parsed JSON result, NULL on error + */ +static void +handle_kyc_check_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_EXCHANGE_KycCheckHandle *kch = cls; + const json_t *j = response; + struct TALER_EXCHANGE_KycStatus ks = { + .http_status = (unsigned int) response_code + }; + + kch->job = NULL; + switch (response_code) + { + case 0: + ks.ec = TALER_EC_GENERIC_INVALID_RESPONSE; + break; + case MHD_HTTP_OK: + GNUNET_break (0); // FIXME + TALER_EXCHANGE_kyc_check_cancel (kch); + return; + case MHD_HTTP_ACCEPTED: + GNUNET_break (0); // FIXME + TALER_EXCHANGE_kyc_check_cancel (kch); + return; + case MHD_HTTP_NO_CONTENT: + GNUNET_break (0); // FIXME + TALER_EXCHANGE_kyc_check_cancel (kch); + return; + case MHD_HTTP_BAD_REQUEST: + ks.ec = TALER_JSON_get_error_code (j); + /* 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: + GNUNET_break (0); // FIXME + TALER_EXCHANGE_kyc_check_cancel (kch); + return; + case MHD_HTTP_NOT_FOUND: + ks.ec = TALER_JSON_get_error_code (j); + TALER_EXCHANGE_kyc_check_cancel (kch); + return; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + ks.ec = TALER_JSON_get_error_code (j); + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + ks.ec = TALER_JSON_get_error_code (j); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d for exchange kyc_check\n", + (unsigned int) response_code, + (int) ks.ec); + break; + } + TALER_EXCHANGE_kyc_check_cancel (kch); +} + + +/** + * Submit a kyc_check request to the exchange and get the exchange's response. + * + * 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. + * + * @param exchange the exchange handle; the exchange must be ready to operate + * @param coin_priv private key to request kyc_check data for + * @param kyc_check_cb the callback to call with the useful result of the + * refresh operation the @a coin_priv was involved in (if any) + * @param kyc_check_cb_cls closure for @a kyc_check_cb + * @return a handle for this request + */ +struct TALER_EXCHANGE_KycCheckHandle * +TALER_EXCHANGE_kyc_check (struct TALER_EXCHANGE_Handle *exchange, + uint64_t payment_target, + const struct GNUNET_HashCode *h_wire, + struct GNUNET_TIME_Relative timeout, + TALER_EXCHANGE_KycStatusCallback cb, + void *cb_cls) +{ + struct TALER_EXCHANGE_KycCheckHandle *kch; + CURL *eh; + struct GNUNET_CURL_Context *ctx; + + if (GNUNET_YES != + TEAH_handle_is_ready (exchange)) + { + GNUNET_break (0); + return NULL; + } + + kch = GNUNET_new (struct TALER_EXCHANGE_KycCheckHandle); + kch->exchange = exchange; + kch->cb = cb; + kch->cb_cls = cb_cls; + kch->url = TEAH_path_to_url (exchange, + "FIXME"); + if (NULL == kch->url) + { + GNUNET_free (kch); + return NULL; + } + eh = TALER_EXCHANGE_curl_easy_get_ (kch->url); + if (NULL == eh) + { + GNUNET_break (0); + GNUNET_free (kch->url); + GNUNET_free (kch); + return NULL; + } + ctx = TEAH_handle_to_context (exchange); + kch->job = GNUNET_CURL_job_add_with_ct_json (ctx, + eh, + &handle_kyc_check_finished, + kch); + return kch; +} + + +/** + * Cancel a kyc_check request. This function cannot be used + * on a request handle if the callback was already invoked. + * + * @param kch the kyc_check handle + */ +void +TALER_EXCHANGE_kyc_check_cancel (struct TALER_EXCHANGE_KycCheckHandle *kch) +{ + if (NULL != kch->job) + { + GNUNET_CURL_job_cancel (kch->job); + kch->job = NULL; + } + GNUNET_free (kch->url); + GNUNET_free (kch); +} + + +/* end of exchange_api_kyc_check.c */ |