aboutsummaryrefslogtreecommitdiff
path: root/src/kyclogic/plugin_kyclogic_kycaid.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/kyclogic/plugin_kyclogic_kycaid.c')
-rw-r--r--src/kyclogic/plugin_kyclogic_kycaid.c1386
1 files changed, 1386 insertions, 0 deletions
diff --git a/src/kyclogic/plugin_kyclogic_kycaid.c b/src/kyclogic/plugin_kyclogic_kycaid.c
new file mode 100644
index 000000000..4c773e93e
--- /dev/null
+++ b/src/kyclogic/plugin_kyclogic_kycaid.c
@@ -0,0 +1,1386 @@
+/*
+ This file is part of GNU Taler
+ Copyright (C) 2022 Taler Systems SA
+
+ Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU Affero 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ Taler; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file plugin_kyclogic_kycaid.c
+ * @brief kycaid for an authentication flow logic
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_kyclogic_plugin.h"
+#include <taler/taler_mhd_lib.h>
+#include <taler/taler_curl_lib.h>
+#include <taler/taler_json_lib.h>
+#include <regex.h>
+#include "taler_util.h"
+
+
+/**
+ * Saves the state of a plugin.
+ */
+struct PluginState
+{
+
+ /**
+ * Our base URL.
+ */
+ char *exchange_base_url;
+
+ /**
+ * Our global configuration.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Context for CURL operations (useful to the event loop)
+ */
+ struct GNUNET_CURL_Context *curl_ctx;
+
+ /**
+ * Context for integrating @e curl_ctx with the
+ * GNUnet event loop.
+ */
+ struct GNUNET_CURL_RescheduleContext *curl_rc;
+
+};
+
+
+/**
+ * Keeps the plugin-specific state for
+ * a given configuration section.
+ */
+struct TALER_KYCLOGIC_ProviderDetails
+{
+
+ /**
+ * Overall plugin state.
+ */
+ struct PluginState *ps;
+
+ /**
+ * Configuration section that configured us.
+ */
+ char *section;
+
+ /**
+ * Authorization token to use when talking
+ * to the service.
+ */
+ char *auth_token;
+
+ /**
+ * Form ID for the KYC check to perform.
+ */
+ char *form_id;
+
+ /**
+ * Where to redirect the client upon completion.
+ */
+ char *post_kyc_redirect_url;
+
+ /**
+ * Validity time for a successful KYC process.
+ */
+ struct GNUNET_TIME_Relative validity;
+
+ /**
+ * Curl-ready authentication header to use.
+ */
+ struct curl_slist *slist;
+
+};
+
+
+/**
+ * Handle for an initiation operation.
+ */
+struct TALER_KYCLOGIC_InitiateHandle
+{
+
+ /**
+ * Hash of the payto:// URI we are initiating
+ * the KYC for.
+ */
+ struct TALER_PaytoHashP h_payto;
+
+ /**
+ * UUID being checked.
+ */
+ uint64_t legitimization_uuid;
+
+ /**
+ * Our configuration details.
+ */
+ const struct TALER_KYCLOGIC_ProviderDetails *pd;
+
+ /**
+ * Continuation to call.
+ */
+ TALER_KYCLOGIC_InitiateCallback cb;
+
+ /**
+ * Closure for @a cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Context for #TEH_curl_easy_post(). Keeps the data that must
+ * persist for Curl to make the upload.
+ */
+ struct TALER_CURL_PostContext ctx;
+
+ /**
+ * Handle for the request.
+ */
+ struct GNUNET_CURL_Job *job;
+
+ /**
+ * URL of the cURL request.
+ */
+ char *url;
+
+};
+
+
+/**
+ * Handle for an KYC proof operation.
+ */
+struct TALER_KYCLOGIC_ProofHandle
+{
+
+ /**
+ * Overall plugin state.
+ */
+ struct PluginState *ps;
+
+ /**
+ * Our configuration details.
+ */
+ const struct TALER_KYCLOGIC_ProviderDetails *pd;
+
+ /**
+ * Continuation to call.
+ */
+ TALER_KYCLOGIC_ProofCallback cb;
+
+ /**
+ * Closure for @e cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Handle for the request.
+ */
+ struct GNUNET_CURL_Job *job;
+
+ /**
+ * URL of the cURL request.
+ */
+ char *url;
+
+ /**
+ * Connection we are handling.
+ */
+ struct MHD_Connection *connection;
+};
+
+
+/**
+ * Handle for an KYC Web hook operation.
+ */
+struct TALER_KYCLOGIC_WebhookHandle
+{
+
+ /**
+ * Continuation to call when done.
+ */
+ TALER_KYCLOGIC_WebhookCallback cb;
+
+ /**
+ * Closure for @a cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Task for asynchronous execution.
+ */
+ struct GNUNET_SCHEDULER_Task *task;
+
+ /**
+ * Overall plugin state.
+ */
+ struct PluginState *ps;
+
+ /**
+ * Our configuration details.
+ */
+ const struct TALER_KYCLOGIC_ProviderDetails *pd;
+
+ /**
+ * Connection we are handling.
+ */
+ struct MHD_Connection *connection;
+
+ /**
+ * Verification ID from the service.
+ */
+ char *verification_id;
+
+ /**
+ * Applicant ID from the service.
+ */
+ char *applicant_id;
+
+ /**
+ * URL of the cURL request.
+ */
+ char *url;
+
+ /**
+ * Handle for the request.
+ */
+ struct GNUNET_CURL_Job *job;
+
+ /**
+ * Response to return asynchronously.
+ */
+ struct MHD_Response *resp;
+
+ /**
+ * Our account ID.
+ */
+ struct TALER_PaytoHashP h_payto;
+
+ /**
+ * Row in legitimizations for the given
+ * @e verification_id.
+ */
+ uint64_t legi_row;
+
+ /**
+ * HTTP response code to return asynchronously.
+ */
+ unsigned int response_code;
+};
+
+
+/**
+ * Release configuration resources previously loaded
+ *
+ * @param[in] pd configuration to release
+ */
+static void
+kycaid_unload_configuration (struct TALER_KYCLOGIC_ProviderDetails *pd)
+{
+ curl_slist_free_all (pd->slist);
+ GNUNET_free (pd->auth_token);
+ GNUNET_free (pd->form_id);
+ GNUNET_free (pd->section);
+ GNUNET_free (pd->post_kyc_redirect_url);
+ GNUNET_free (pd);
+}
+
+
+/**
+ * Load the configuration of the KYC provider.
+ *
+ * @param cls closure
+ * @param provider_section_name configuration section to parse
+ * @return NULL if configuration is invalid
+ */
+static struct TALER_KYCLOGIC_ProviderDetails *
+kycaid_load_configuration (void *cls,
+ const char *provider_section_name)
+{
+ struct PluginState *ps = cls;
+ struct TALER_KYCLOGIC_ProviderDetails *pd;
+
+ pd = GNUNET_new (struct TALER_KYCLOGIC_ProviderDetails);
+ pd->ps = ps;
+ pd->section = GNUNET_strdup (provider_section_name);
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (ps->cfg,
+ provider_section_name,
+ "KYC_KYCAID_VALIDITY",
+ &pd->validity))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ provider_section_name,
+ "KYC_KYCAID_VALIDITY");
+ kycaid_unload_configuration (pd);
+ return NULL;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (ps->cfg,
+ provider_section_name,
+ "KYC_KYCAID_AUTH_TOKEN",
+ &pd->auth_token))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ provider_section_name,
+ "KYC_KYCAID_AUTH_TOKEN");
+ kycaid_unload_configuration (pd);
+ return NULL;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (ps->cfg,
+ provider_section_name,
+ "KYC_KYCAID_POST_URL",
+ &pd->post_kyc_redirect_url))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ provider_section_name,
+ "KYC_KYCAID_POST_URL");
+ kycaid_unload_configuration (pd);
+ return NULL;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (ps->cfg,
+ provider_section_name,
+ "KYC_KYCAID_FORM_ID",
+ &pd->form_id))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ provider_section_name,
+ "KYC_KYCAID_FORM_ID");
+ kycaid_unload_configuration (pd);
+ return NULL;
+ }
+ {
+ char *auth;
+
+ GNUNET_asprintf (&auth,
+ "%s: Token %s",
+ MHD_HTTP_HEADER_AUTHORIZATION,
+ pd->auth_token);
+ pd->slist = curl_slist_append (NULL,
+ auth);
+ GNUNET_free (auth);
+ }
+ return pd;
+}
+
+
+/**
+ * Cancel KYC check initiation.
+ *
+ * @param[in] ih handle of operation to cancel
+ */
+static void
+kycaid_initiate_cancel (struct TALER_KYCLOGIC_InitiateHandle *ih)
+{
+ if (NULL != ih->job)
+ {
+ GNUNET_CURL_job_cancel (ih->job);
+ ih->job = NULL;
+ }
+ GNUNET_free (ih->url);
+ TALER_curl_easy_post_finished (&ih->ctx);
+ GNUNET_free (ih);
+}
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP "/forms/{form_id}/urls" request.
+ *
+ * @param cls the `struct TALER_KYCLOGIC_InitiateHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param response parsed JSON result, NULL on error
+ */
+static void
+handle_initiate_finished (void *cls,
+ long response_code,
+ const void *response)
+{
+ struct TALER_KYCLOGIC_InitiateHandle *ih = cls;
+ const json_t *j = response;
+
+ ih->job = NULL;
+ switch (response_code)
+ {
+ case MHD_HTTP_OK:
+ {
+ const char *verification_id;
+ const char *form_url;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("verification_id",
+ &verification_id),
+ GNUNET_JSON_spec_string ("form_url",
+ &form_url),
+ GNUNET_JSON_spec_end ()
+ };
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (j,
+ spec,
+ NULL, NULL))
+ {
+ GNUNET_break_op (0);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ }
+ ih->cb (ih->cb_cls,
+ TALER_EC_NONE,
+ form_url,
+ NULL, /* no provider_user_id */
+ verification_id,
+ NULL /* no error */);
+ GNUNET_JSON_parse_free (spec);
+ }
+ break;
+ case MHD_HTTP_BAD_REQUEST:
+ case MHD_HTTP_NOT_FOUND:
+ case MHD_HTTP_CONFLICT:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "KYCAID failed with response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_LOGIC_BUG,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ case MHD_HTTP_UNAUTHORIZED:
+ case MHD_HTTP_PAYMENT_REQUIRED:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Refused access with HTTP status code %u\n",
+ (unsigned int) response_code);
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_ACCESS_REFUSED,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ case MHD_HTTP_REQUEST_TIMEOUT:
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_TIMEOUT,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ case MHD_HTTP_UNPROCESSABLE_CONTENT: /* validation */
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "KYCAID failed with response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ case MHD_HTTP_TOO_MANY_REQUESTS:
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_RATE_LIMIT_EXCEEDED,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ case MHD_HTTP_INTERNAL_SERVER_ERROR:
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unexpected KYCAID response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ ih->cb (ih->cb_cls,
+ TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY,
+ NULL,
+ NULL,
+ NULL,
+ json_string_value (json_object_get (j,
+ "type")));
+ break;
+ }
+ kycaid_initiate_cancel (ih);
+}
+
+
+/**
+ * Initiate KYC check.
+ *
+ * @param cls the @e cls of this struct with the plugin-specific state
+ * @param pd provider configuration details
+ * @param account_id which account to trigger process for
+ * @param legitimization_uuid unique ID for the legitimization process
+ * @param cb function to call with the result
+ * @param cb_cls closure for @a cb
+ * @return handle to cancel operation early
+ */
+static struct TALER_KYCLOGIC_InitiateHandle *
+kycaid_initiate (void *cls,
+ const struct TALER_KYCLOGIC_ProviderDetails *pd,
+ const struct TALER_PaytoHashP *account_id,
+ uint64_t legitimization_uuid,
+ TALER_KYCLOGIC_InitiateCallback cb,
+ void *cb_cls)
+{
+ struct PluginState *ps = cls;
+ struct TALER_KYCLOGIC_InitiateHandle *ih;
+ json_t *body;
+ CURL *eh;
+
+ eh = curl_easy_init ();
+ if (NULL == eh)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ ih = GNUNET_new (struct TALER_KYCLOGIC_InitiateHandle);
+ ih->legitimization_uuid = legitimization_uuid;
+ ih->cb = cb;
+ ih->cb_cls = cb_cls;
+ ih->h_payto = *account_id;
+ ih->pd = pd;
+ GNUNET_asprintf (&ih->url,
+ "https://api.kycaid.com/forms/%s/urls",
+ pd->form_id);
+ body = GNUNET_JSON_PACK (
+ GNUNET_JSON_pack_string ("redirect_url",
+ pd->post_kyc_redirect_url),
+ GNUNET_JSON_pack_data64_auto ("external_applicant_id",
+ account_id)
+ );
+ GNUNET_break (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_VERBOSE,
+ 0));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_MAXREDIRS,
+ 1L));
+ GNUNET_break (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_URL,
+ ih->url));
+ if (GNUNET_OK !=
+ TALER_curl_easy_post (&ih->ctx,
+ eh,
+ body))
+ {
+ GNUNET_break (0);
+ GNUNET_free (ih->url);
+ GNUNET_free (ih);
+ curl_easy_cleanup (eh);
+ json_decref (body);
+ return NULL;
+ }
+ ih->job = GNUNET_CURL_job_add2 (ps->curl_ctx,
+ eh,
+ ih->ctx.headers,
+ &handle_initiate_finished,
+ ih);
+ GNUNET_CURL_extend_headers (ih->job,
+ pd->slist);
+ return ih;
+}
+
+
+/**
+ * Cancel KYC proof.
+ *
+ * @param[in] ph handle of operation to cancel
+ */
+static void
+kycaid_proof_cancel (struct TALER_KYCLOGIC_ProofHandle *ph)
+{
+ if (NULL != ph->job)
+ {
+ GNUNET_CURL_job_cancel (ph->job);
+ ph->job = NULL;
+ }
+ GNUNET_free (ph->url);
+ GNUNET_free (ph);
+}
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP "/verifications/{verification_id}" request.
+ *
+ * @param cls the `struct TALER_KYCLOGIC_ProofHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param response parsed JSON result, NULL on error
+ */
+static void
+handle_proof_finished (void *cls,
+ long response_code,
+ const void *response)
+{
+ struct TALER_KYCLOGIC_ProofHandle *ph = cls;
+ const json_t *j = response;
+ struct MHD_Response *resp;
+
+ ph->job = NULL;
+ switch (response_code)
+ {
+ case MHD_HTTP_OK:
+ {
+ const char *applicant_id;
+ const char *verification_id;
+ bool verified;
+ json_t *verifications;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("applicant_id",
+ &applicant_id),
+ GNUNET_JSON_spec_string ("verification_id",
+ &verification_id),
+ GNUNET_JSON_spec_bool ("verified",
+ &verified),
+ GNUNET_JSON_spec_json ("verifications",
+ &verifications),
+ GNUNET_JSON_spec_end ()
+ };
+ struct GNUNET_TIME_Absolute expiration;
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (j,
+ spec,
+ NULL, NULL))
+ {
+ GNUNET_break_op (0);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ }
+ /* FIXME: comment out, unless debugging ... */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "The provider returned the following verifications:\n");
+ json_dumpf (verifications,
+ stderr,
+ JSON_INDENT (2));
+ if (verified)
+ {
+ resp = NULL; // FIXME: generate response!
+ expiration = GNUNET_TIME_relative_to_absolute (ph->pd->validity);
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_SUCCESS,
+ applicant_id,
+ verification_id,
+ expiration,
+ MHD_HTTP_OK,
+ resp);
+ }
+ else
+ {
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_USER_ABORTED,
+ applicant_id,
+ verification_id,
+ GNUNET_TIME_UNIT_ZERO_ABS,
+ MHD_HTTP_OK,
+ resp);
+ }
+ GNUNET_JSON_parse_free (spec);
+ }
+ break;
+ case MHD_HTTP_BAD_REQUEST:
+ case MHD_HTTP_NOT_FOUND:
+ case MHD_HTTP_CONFLICT:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "KYCAID failed with response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_INTERNAL_SERVER_ERROR,
+ resp);
+ break;
+ case MHD_HTTP_UNAUTHORIZED:
+ case MHD_HTTP_PAYMENT_REQUIRED:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Refused access with HTTP status code %u\n",
+ (unsigned int) response_code);
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_NETWORK_AUTHENTICATION_REQUIRED,
+ resp);
+ break;
+ case MHD_HTTP_REQUEST_TIMEOUT:
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_GATEWAY_TIMEOUT,
+ resp);
+ break;
+ case MHD_HTTP_UNPROCESSABLE_CONTENT: /* validation */
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "KYCAID failed with response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ case MHD_HTTP_TOO_MANY_REQUESTS:
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_SERVICE_UNAVAILABLE,
+ resp);
+ break;
+ case MHD_HTTP_INTERNAL_SERVER_ERROR:
+ resp = NULL; // FIXME: generate response!
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ default:
+ resp = NULL; // FIXME: generate response!
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unexpected KYCAID response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ ph->cb (ph->cb_cls,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ NULL, /* user id */
+ NULL, /* provider legi ID */
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ }
+ kycaid_proof_cancel (ph);
+}
+
+
+/**
+ * Check KYC status and return status to human.
+ *
+ * @param cls the @e cls of this struct with the plugin-specific state
+ * @param pd provider configuration details
+ * @param url_path rest of the URL after `/kyc-webhook/`
+ * @param connection MHD connection object (for HTTP headers)
+ * @param account_id which account to trigger process for
+ * @param legi_row row in the table the legitimization is for
+ * @param provider_user_id user ID (or NULL) the proof is for
+ * @param provider_legitimization_id legitimization ID the proof is for
+ * @param cb function to call with the result
+ * @param cb_cls closure for @a cb
+ * @return handle to cancel operation early
+ */
+static struct TALER_KYCLOGIC_ProofHandle *
+kycaid_proof (void *cls,
+ const struct TALER_KYCLOGIC_ProviderDetails *pd,
+ const char *const url_path[],
+ struct MHD_Connection *connection,
+ const struct TALER_PaytoHashP *account_id,
+ uint64_t legi_row,
+ const char *provider_user_id,
+ const char *provider_legitimization_id,
+ TALER_KYCLOGIC_ProofCallback cb,
+ void *cb_cls)
+{
+ struct PluginState *ps = cls;
+ struct TALER_KYCLOGIC_ProofHandle *ph;
+ CURL *eh;
+
+ eh = curl_easy_init ();
+ if (NULL == eh)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+
+ ph = GNUNET_new (struct TALER_KYCLOGIC_ProofHandle);
+ ph->ps = ps;
+ ph->pd = pd;
+ ph->cb = cb;
+ ph->cb_cls = cb_cls;
+ ph->connection = connection;
+ GNUNET_asprintf (&ph->url,
+ "https://api.kycaid.com/verifications/%s",
+ provider_legitimization_id);
+ GNUNET_break (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_VERBOSE,
+ 1));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_MAXREDIRS,
+ 1L));
+ GNUNET_break (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_URL,
+ ph->url));
+ ph->job = GNUNET_CURL_job_add (ps->curl_ctx,
+ eh,
+ &handle_proof_finished,
+ ph);
+ GNUNET_CURL_extend_headers (ph->job,
+ pd->slist);
+ return ph;
+}
+
+
+/**
+ * Cancel KYC webhook execution.
+ *
+ * @param[in] wh handle of operation to cancel
+ */
+static void
+kycaid_webhook_cancel (struct TALER_KYCLOGIC_WebhookHandle *wh)
+{
+ if (NULL != wh->task)
+ {
+ GNUNET_SCHEDULER_cancel (wh->task);
+ wh->task = NULL;
+ }
+ if (NULL != wh->job)
+ {
+ GNUNET_CURL_job_cancel (wh->job);
+ wh->job = NULL;
+ }
+ GNUNET_free (wh->verification_id);
+ GNUNET_free (wh->applicant_id);
+ GNUNET_free (wh);
+}
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP "/verifications/{verification_id}" request.
+ *
+ * @param cls the `struct TALER_KYCLOGIC_WebhookHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param response parsed JSON result, NULL on error
+ */
+static void
+handle_webhook_finished (void *cls,
+ long response_code,
+ const void *response)
+{
+ struct TALER_KYCLOGIC_WebhookHandle *wh = cls;
+ const json_t *j = response;
+ struct MHD_Response *resp;
+
+ wh->job = NULL;
+ switch (response_code)
+ {
+ case MHD_HTTP_OK:
+ {
+ const char *applicant_id;
+ const char *verification_id;
+ bool verified;
+ json_t *verifications;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("applicant_id",
+ &applicant_id),
+ GNUNET_JSON_spec_string ("verification_id",
+ &verification_id),
+ GNUNET_JSON_spec_bool ("verified",
+ &verified),
+ GNUNET_JSON_spec_json ("verifications",
+ &verifications),
+ GNUNET_JSON_spec_end ()
+ };
+ struct GNUNET_TIME_Absolute expiration;
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (j,
+ spec,
+ NULL, NULL))
+ {
+ GNUNET_break_op (0);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ }
+ /* FIXME: comment out, unless debugging ... */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "The provider returned the following verifications:\n");
+ json_dumpf (verifications,
+ stderr,
+ JSON_INDENT (2));
+ if (verified)
+ {
+ resp = NULL; // FIXME: generate response!
+ expiration = GNUNET_TIME_relative_to_absolute (wh->pd->validity);
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_SUCCESS,
+ expiration,
+ MHD_HTTP_OK,
+ resp);
+ }
+ else
+ {
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_USER_ABORTED,
+ GNUNET_TIME_UNIT_ZERO_ABS,
+ MHD_HTTP_OK,
+ resp);
+ }
+ GNUNET_JSON_parse_free (spec);
+ }
+ break;
+ case MHD_HTTP_BAD_REQUEST:
+ case MHD_HTTP_NOT_FOUND:
+ case MHD_HTTP_CONFLICT:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "KYCAID failed with response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_INTERNAL_SERVER_ERROR,
+ resp);
+ break;
+ case MHD_HTTP_UNAUTHORIZED:
+ case MHD_HTTP_PAYMENT_REQUIRED:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Refused access with HTTP status code %u\n",
+ (unsigned int) response_code);
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_NETWORK_AUTHENTICATION_REQUIRED,
+ resp);
+ break;
+ case MHD_HTTP_REQUEST_TIMEOUT:
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_GATEWAY_TIMEOUT,
+ resp);
+ break;
+ case MHD_HTTP_UNPROCESSABLE_CONTENT: /* validation */
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "KYCAID failed with response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ case MHD_HTTP_TOO_MANY_REQUESTS:
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_SERVICE_UNAVAILABLE,
+ resp);
+ break;
+ case MHD_HTTP_INTERNAL_SERVER_ERROR:
+ resp = NULL; // FIXME: generate response!
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ default:
+ resp = NULL; // FIXME: generate response!
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unexpected KYCAID response %u:\n",
+ (unsigned int) response_code);
+ json_dumpf (j,
+ stderr,
+ JSON_INDENT (2));
+ wh->cb (wh->cb_cls,
+ wh->legi_row,
+ &wh->h_payto,
+ wh->applicant_id,
+ wh->verification_id,
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ MHD_HTTP_BAD_GATEWAY,
+ resp);
+ break;
+ }
+ kycaid_webhook_cancel (wh);
+}
+
+
+/**
+ * Asynchronously return a reply for the webhook.
+ *
+ * @param cls a `struct TALER_KYCLOGIC_WebhookHandle *`
+ */
+static void
+async_webhook_reply (void *cls)
+{
+ struct TALER_KYCLOGIC_WebhookHandle *wh = cls;
+
+ wh->cb (wh->cb_cls,
+ 0LLU, /* legitimization row ID (unknown) */
+ NULL, /* our account ID */
+ NULL, /* provider user ID */
+ NULL, /* provider legi ID */
+ TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
+ GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
+ wh->response_code,
+ wh->resp);
+ kycaid_webhook_cancel (wh);
+}
+
+
+/**
+ * Check KYC status and return result for Webhook.
+ *
+ * @param cls the @e cls of this struct with the plugin-specific state
+ * @param pd provider configuration details
+ * @param plc callback to lookup accounts with
+ * @param plc_cls closure for @a plc
+ * @param http_method HTTP method used for the webhook
+ * @param url_path rest of the URL after `/kyc-webhook/`
+ * @param connection MHD connection object (for HTTP headers)
+ * @param body HTTP request body
+ * @param cb function to call with the result
+ * @param cb_cls closure for @a cb
+ * @return handle to cancel operation early
+ */
+static struct TALER_KYCLOGIC_WebhookHandle *
+kycaid_webhook (void *cls,
+ const struct TALER_KYCLOGIC_ProviderDetails *pd,
+ TALER_KYCLOGIC_ProviderLookupCallback plc,
+ void *plc_cls,
+ const char *http_method,
+ const char *const url_path[],
+ struct MHD_Connection *connection,
+ const json_t *body,
+ TALER_KYCLOGIC_WebhookCallback cb,
+ void *cb_cls)
+{
+ struct PluginState *ps = cls;
+ struct TALER_KYCLOGIC_WebhookHandle *wh;
+ CURL *eh;
+ const char *request_id;
+ const char *type;
+ const char *verification_id;
+ const char *applicant_id;
+ const char *status;
+ bool verified;
+ json_t *verifications;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("request_id",
+ &request_id),
+ GNUNET_JSON_spec_string ("type",
+ &type),
+ GNUNET_JSON_spec_string ("verification_id",
+ &verification_id),
+ GNUNET_JSON_spec_string ("applicant_id",
+ &applicant_id),
+ GNUNET_JSON_spec_string ("status",
+ &status),
+ GNUNET_JSON_spec_bool ("verified",
+ &verified),
+ GNUNET_JSON_spec_json ("verifications",
+ &verifications),
+ GNUNET_JSON_spec_end ()
+ };
+ enum GNUNET_DB_QueryStatus qs;
+
+ wh = GNUNET_new (struct TALER_KYCLOGIC_WebhookHandle);
+ wh->cb = cb;
+ wh->cb_cls = cb_cls;
+ wh->ps = ps;
+ wh->pd = pd;
+ wh->connection = connection;
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (body,
+ spec,
+ NULL, NULL))
+ {
+ GNUNET_break_op (0);
+ json_dumpf (body,
+ stderr,
+ JSON_INDENT (2));
+ wh->resp = NULL; // FIXME: generate response!
+ wh->response_code = MHD_HTTP_BAD_REQUEST;
+ wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
+ wh);
+ return wh;
+ }
+ qs = plc (plc_cls,
+ pd->section,
+ verification_id,
+ &wh->h_payto,
+ &wh->legi_row);
+ if (qs < 0)
+ {
+ wh->resp = NULL; // FIXME: generate response!
+ wh->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
+ wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
+ wh);
+ return wh;
+ }
+ if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Received webhook for unknown verification ID `%s'\n",
+ verification_id);
+ wh->resp = NULL; // FIXME: generate response!
+ wh->response_code = MHD_HTTP_NOT_FOUND;
+ wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
+ wh);
+ return wh;
+ }
+ wh->verification_id = GNUNET_strdup (verification_id);
+ wh->applicant_id = GNUNET_strdup (applicant_id);
+
+ eh = curl_easy_init ();
+ if (NULL == eh)
+ {
+ GNUNET_break (0);
+ wh->resp = NULL; // FIXME: generate response!
+ wh->response_code = MHD_HTTP_BAD_REQUEST;
+ wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
+ wh);
+ return wh;
+ }
+
+ GNUNET_asprintf (&wh->url,
+ "https://api.kycaid.com/verifications/%s",
+ verification_id);
+ GNUNET_break (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_VERBOSE,
+ 1));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_MAXREDIRS,
+ 1L));
+ GNUNET_break (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_URL,
+ wh->url));
+ wh->job = GNUNET_CURL_job_add (ps->curl_ctx,
+ eh,
+ &handle_webhook_finished,
+ wh);
+ GNUNET_CURL_extend_headers (wh->job,
+ pd->slist);
+ return wh;
+}
+
+
+/**
+ * Initialize Kycaid.0 KYC logic plugin
+ *
+ * @param cls a configuration instance
+ * @return NULL on error, otherwise a `struct TALER_KYCLOGIC_Plugin`
+ */
+void *
+libtaler_plugin_kyclogic_kycaid_init (void *cls)
+{
+ const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
+ struct TALER_KYCLOGIC_Plugin *plugin;
+ struct PluginState *ps;
+
+ ps = GNUNET_new (struct PluginState);
+ ps->cfg = cfg;
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg,
+ "exchange",
+ "BASE_URL",
+ &ps->exchange_base_url))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ "exchange",
+ "BASE_URL");
+ GNUNET_free (ps);
+ return NULL;
+ }
+
+ ps->curl_ctx
+ = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,
+ &ps->curl_rc);
+ if (NULL == ps->curl_ctx)
+ {
+ GNUNET_break (0);
+ GNUNET_free (ps->exchange_base_url);
+ GNUNET_free (ps);
+ return NULL;
+ }
+ ps->curl_rc = GNUNET_CURL_gnunet_rc_create (ps->curl_ctx);
+
+ plugin = GNUNET_new (struct TALER_KYCLOGIC_Plugin);
+ plugin->cls = ps;
+ plugin->load_configuration
+ = &kycaid_load_configuration;
+ plugin->unload_configuration
+ = &kycaid_unload_configuration;
+ plugin->initiate
+ = &kycaid_initiate;
+ plugin->initiate_cancel
+ = &kycaid_initiate_cancel;
+ plugin->proof
+ = &kycaid_proof;
+ plugin->proof_cancel
+ = &kycaid_proof_cancel;
+ plugin->webhook
+ = &kycaid_webhook;
+ plugin->webhook_cancel
+ = &kycaid_webhook_cancel;
+ return plugin;
+}
+
+
+/**
+ * Unload authorization plugin
+ *
+ * @param cls a `struct TALER_KYCLOGIC_Plugin`
+ * @return NULL (always)
+ */
+void *
+libtaler_plugin_kyclogic_kycaid_done (void *cls)
+{
+ struct TALER_KYCLOGIC_Plugin *plugin = cls;
+ struct PluginState *ps = plugin->cls;
+
+ if (NULL != ps->curl_ctx)
+ {
+ GNUNET_CURL_fini (ps->curl_ctx);
+ ps->curl_ctx = NULL;
+ }
+ if (NULL != ps->curl_rc)
+ {
+ GNUNET_CURL_gnunet_rc_destroy (ps->curl_rc);
+ ps->curl_rc = NULL;
+ }
+ GNUNET_free (ps->exchange_base_url);
+ GNUNET_free (ps);
+ GNUNET_free (plugin);
+ return NULL;
+}