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-rw-r--r--src/include/taler_exchange_service.h104
-rw-r--r--src/lib/Makefile.am1
-rw-r--r--src/lib/exchange_api_kyc_check.c215
3 files changed, 320 insertions, 0 deletions
diff --git a/src/include/taler_exchange_service.h b/src/include/taler_exchange_service.h
index f95577d0c..ed6f2eb1a 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -1899,6 +1899,110 @@ void
TALER_EXCHANGE_recoup_cancel (struct TALER_EXCHANGE_RecoupHandle *ph);
+/* ********************* /kyc* *********************** */
+
+/**
+ * Handle for a ``/kyc-check`` operation.
+ */
+struct TALER_EXCHANGE_KycCheckHandle;
+
+
+/**
+ * KYC status response details.
+ */
+struct TALER_EXCHANGE_KycStatus
+{
+ /**
+ * HTTP status code returned by the exchange.
+ */
+ unsigned int http_status;
+
+ /**
+ * Taler error code, if any.
+ */
+ enum TALER_ErrorCode ec;
+
+ union
+ {
+
+ /**
+ * KYC is OK, affirmation returned by the exchange.
+ */
+ struct
+ {
+
+ /**
+ * Time of the affirmation.
+ */
+ struct GNUNET_TIME_Absolute timestamp;
+
+ /**
+ * The signing public key used for @e exchange_sig.
+ */
+ struct TALER_ExchangePublicKeyP exchange_pub;
+
+ /**
+ * Signature of purpose
+ * #TALER_SIGNATURE_ACCOUNT_SETUP_SUCCESS affirming
+ * the successful KYC process.
+ */
+ struct TALER_ExchangeSignatureP exchange_sig;
+
+ } kyc_ok;
+
+ /**
+ * URL the user should open in a browser if
+ * the KYC process is to be run. Returned if
+ * @e http_status is #MHD_HTTP_ACCEPTED.
+ */
+ const char *kyc_url;
+
+ } details;
+
+};
+
+/**
+ * Function called with the result of a KYC check.
+ *
+ * @param cls closure
+ * @param ks the account's KYC status details
+ */
+typedef void
+(*TALER_EXCHANGE_KycStatusCallback)(
+ void *cls,
+ const struct TALER_EXCHANGE_KycStatus *ks);
+
+
+/**
+ * Run interaction with exchange to check KYC status
+ * of a merchant.
+ *
+ * @param eh exchange handle to use
+ * @param payment_target number identifying the target
+ * @param h_payto hash of the payto:// URI at @a payment_target
+ * @param timeout how long to wait for a positive KYC status
+ * @param cb function to call with the result
+ * @param cb_cls closure for @a cb
+ * @return NULL on error
+ */
+struct TALER_EXCHANGE_KycCheckHandle *
+TALER_EXCHANGE_kyc_check (struct TALER_EXCHANGE_Handle *eh,
+ uint64_t payment_target,
+ const struct GNUNET_HashCode *h_wire,
+ struct GNUNET_TIME_Relative timeout,
+ TALER_EXCHANGE_KycStatusCallback cb,
+ void *cb_cls);
+
+
+/**
+ * Cancel KYC check operation.
+ *
+ * @param kyc handle for operation to cancel
+ */
+void
+TALER_EXCHANGE_kyc_check_cancel (struct TALER_EXCHANGE_KycCheckHandle *kyc);
+
+
/* ********************* /management *********************** */
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 */
generated by cgit v1.2.3 (git 2.26.2) at 2024-10-30 08:45:43 +0000