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-rw-r--r--src/include/taler_exchange_service.h82
-rw-r--r--src/lib/Makefile.am1
-rw-r--r--src/lib/exchange_api_kyc_proof.c217
3 files changed, 300 insertions, 0 deletions
diff --git a/src/include/taler_exchange_service.h b/src/include/taler_exchange_service.h
index 361956cbe..54fca65cb 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -2161,6 +2161,88 @@ TALER_EXCHANGE_kyc_check_cancel (struct TALER_EXCHANGE_KycCheckHandle *kyc);
/**
+ * KYC proof response details.
+ */
+struct TALER_EXCHANGE_KycProofResponse
+{
+ /**
+ * 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
+ {
+
+ /**
+ * Where to redirect the client next.
+ */
+ const char *redirect_url;
+
+ } found;
+
+ } 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_KycProofCallback)(
+ void *cls,
+ const struct TALER_EXCHANGE_KycProofResponse *kpr);
+
+
+/**
+ * Handle for a /kyc-proof operation.
+ */
+struct TALER_EXCHANGE_KycProofHandle;
+
+
+/**
+ * Run interaction with exchange to provide proof of KYC status.
+ *
+ * @param eh exchange handle to use
+ * @param payment_target number identifying the target
+ * @param code OAuth 2.0 code argument
+ * @param state OAuth 2.0 state argument
+ * @param cb function to call with the result
+ * @param cb_cls closure for @a cb
+ * @return NULL on error
+ */
+struct TALER_EXCHANGE_KycProofHandle *
+TALER_EXCHANGE_kyc_proof (struct TALER_EXCHANGE_Handle *eh,
+ uint64_t payment_target,
+ const char *code,
+ const char *state,
+ TALER_EXCHANGE_KycProofCallback cb,
+ void *cb_cls);
+
+
+/**
+ * Cancel KYC proof operation.
+ *
+ * @param kph handle for operation to cancel
+ */
+void
+TALER_EXCHANGE_kyc_proof_cancel (struct TALER_EXCHANGE_KycProofHandle *kph);
+
+
+/**
* Handle for a ``/kyc-wallet`` operation.
*/
struct TALER_EXCHANGE_KycWalletHandle;
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 518b725a8..2862799df 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -28,6 +28,7 @@ libtalerexchange_la_SOURCES = \
exchange_api_deposit.c \
exchange_api_deposits_get.c \
exchange_api_kyc_check.c \
+ exchange_api_kyc_proof.c \
exchange_api_kyc_wallet.c \
exchange_api_link.c \
exchange_api_management_auditor_disable.c \
diff --git a/src/lib/exchange_api_kyc_proof.c b/src/lib/exchange_api_kyc_proof.c
new file mode 100644
index 000000000..802152277
--- /dev/null
+++ b/src/lib/exchange_api_kyc_proof.c
@@ -0,0 +1,217 @@
+/*
+ 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_proof.c
+ * @brief Implementation of the /kyc-proof request
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <microhttpd.h> /* just for HTTP proof 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-proof`` handle
+ */
+struct TALER_EXCHANGE_KycProofHandle
+{
+
+ /**
+ * The connection to exchange this request handle will use
+ */
+ struct TALER_EXCHANGE_Handle *exchange;
+
+ /**
+ * The url for this request.
+ */
+ char *url;
+
+ /**
+ * Handle to our CURL request.
+ */
+ CURL *eh;
+
+ /**
+ * Handle for the request.
+ */
+ struct GNUNET_CURL_Job *job;
+
+ /**
+ * Function to call with the result.
+ */
+ TALER_EXCHANGE_KycProofCallback cb;
+
+ /**
+ * Closure for @e cb.
+ */
+ void *cb_cls;
+
+};
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP /kyc-proof request.
+ *
+ * @param cls the `struct TALER_EXCHANGE_KycProofHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param response parsed JSON result, NULL on error
+ */
+static void
+handle_kyc_proof_finished (void *cls,
+ long response_code,
+ const void *response)
+{
+ struct TALER_EXCHANGE_KycProofHandle *kph = cls;
+ const json_t *j = response;
+ struct TALER_EXCHANGE_KycProofResponse kpr = {
+ .http_status = (unsigned int) response_code
+ };
+
+ kph->job = NULL;
+ switch (response_code)
+ {
+ case 0:
+ kpr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
+ break;
+ case MHD_HTTP_FOUND:
+ {
+ char *redirect_url;
+
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_getinfo (kph->eh,
+ CURLINFO_REDIRECT_URL,
+ &redirect_url));
+ kpr.details.found.redirect_url = redirect_url;
+ break;
+ }
+ case MHD_HTTP_BAD_REQUEST:
+ kpr.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:
+ kpr.ec = TALER_JSON_get_error_code (j);
+ break;
+ case MHD_HTTP_NOT_FOUND:
+ kpr.ec = TALER_JSON_get_error_code (j);
+ break;
+ case MHD_HTTP_BAD_GATEWAY:
+ kpr.ec = TALER_JSON_get_error_code (j);
+ /* Server had an internal issue; we should retry, but this API
+ leaves this to the application */
+ break;
+ case MHD_HTTP_GATEWAY_TIMEOUT:
+ kpr.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);
+ kpr.ec = TALER_JSON_get_error_code (j);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unexpected response code %u/%d for exchange kyc_proof\n",
+ (unsigned int) response_code,
+ (int) kpr.ec);
+ break;
+ }
+ kph->cb (kph->cb_cls,
+ &kpr);
+ TALER_EXCHANGE_kyc_proof_cancel (kph);
+}
+
+
+struct TALER_EXCHANGE_KycProofHandle *
+TALER_EXCHANGE_kyc_proof (struct TALER_EXCHANGE_Handle *exchange,
+ uint64_t payment_target,
+ const char *code,
+ const char *state,
+ TALER_EXCHANGE_KycProofCallback cb,
+ void *cb_cls)
+{
+ struct TALER_EXCHANGE_KycProofHandle *kph;
+ struct GNUNET_CURL_Context *ctx;
+ char *arg_str;
+
+ if (GNUNET_YES !=
+ TEAH_handle_is_ready (exchange))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ /* TODO: any escaping of code/state needed??? */
+ GNUNET_asprintf (&arg_str,
+ "/kyc-proof/%llu?code=%s&state=%s",
+ (unsigned long long) payment_target,
+ code,
+ state);
+ kph = GNUNET_new (struct TALER_EXCHANGE_KycProofHandle);
+ kph->exchange = exchange;
+ kph->cb = cb;
+ kph->cb_cls = cb_cls;
+ kph->url = TEAH_path_to_url (exchange,
+ arg_str);
+ GNUNET_free (arg_str);
+ if (NULL == kph->url)
+ {
+ GNUNET_free (kph);
+ return NULL;
+ }
+ kph->eh = TALER_EXCHANGE_curl_easy_get_ (kph->url);
+ if (NULL == kph->eh)
+ {
+ GNUNET_break (0);
+ GNUNET_free (kph->url);
+ GNUNET_free (kph);
+ return NULL;
+ }
+ /* disable location following, we want to learn the
+ result of a 302 redirect! */
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (kph->eh,
+ CURLOPT_FOLLOWLOCATION,
+ 0L));
+ ctx = TEAH_handle_to_context (exchange);
+ kph->job = GNUNET_CURL_job_add_with_ct_json (ctx,
+ kph->eh,
+ &handle_kyc_proof_finished,
+ kph);
+ return kph;
+}
+
+
+void
+TALER_EXCHANGE_kyc_proof_cancel (struct TALER_EXCHANGE_KycProofHandle *kph)
+{
+ if (NULL != kph->job)
+ {
+ GNUNET_CURL_job_cancel (kph->job);
+ kph->job = NULL;
+ }
+ GNUNET_free (kph->url);
+ GNUNET_free (kph);
+}
+
+
+/* end of exchange_api_kyc_proof.c */
generated by cgit v1.2.3 (git 2.26.2) at 2024-10-30 17:39:05 +0000