/*
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
*/
/**
* @file plugin_kyclogic_persona.c
* @brief persona for an authentication flow logic
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_kyclogic_plugin.h"
#include "taler_mhd_lib.h"
#include "taler_curl_lib.h"
#include "taler_json_lib.h"
#include "taler_kyclogic_lib.h"
#include "taler_templating_lib.h"
#include
#include "taler_util.h"
/**
* Which version of the persona API are we implementing?
*/
#define PERSONA_VERSION "2021-07-05"
/**
* 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;
/**
* Authorization token to use when receiving webhooks from the Persona service. Optional. Note that
* webhooks are *global* and not per template.
*/
char *webhook_token;
};
/**
* 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;
/**
* Salt to use for idempotency.
*/
char *salt;
/**
* Authorization token to use when talking
* to the service.
*/
char *auth_token;
/**
* Template ID for the KYC check to perform.
*/
char *template_id;
/**
* Subdomain to use.
*/
char *subdomain;
/**
* 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;
/**
* Request-specific headers to use.
*/
struct curl_slist *slist;
};
/**
* 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;
/**
* Connection we are handling.
*/
struct MHD_Connection *connection;
/**
* Task for asynchronous execution.
*/
struct GNUNET_SCHEDULER_Task *task;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* URL of the cURL request.
*/
char *url;
/**
* Hash of the payto:// URI we are checking the KYC for.
*/
struct TALER_PaytoHashP h_payto;
/**
* Row in the legitimization processes of the
* legitimization proof that is being checked.
*/
uint64_t process_row;
/**
* Account ID at the provider.
*/
char *provider_user_id;
/**
* Inquiry ID at the provider.
*/
char *inquiry_id;
};
/**
* 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 *inquiry_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;
/**
* ID of the template the webhook is about,
* according to the service.
*/
const char *template_id;
/**
* Our account ID.
*/
struct TALER_PaytoHashP h_payto;
/**
* UUID being checked.
*/
uint64_t process_row;
/**
* HTTP response code to return asynchronously.
*/
unsigned int response_code;
};
/**
* Release configuration resources previously loaded
*
* @param[in] pd configuration to release
*/
static void
persona_unload_configuration (struct TALER_KYCLOGIC_ProviderDetails *pd)
{
curl_slist_free_all (pd->slist);
GNUNET_free (pd->auth_token);
GNUNET_free (pd->template_id);
GNUNET_free (pd->subdomain);
GNUNET_free (pd->salt);
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 *
persona_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_PERSONA_VALIDITY",
&pd->validity))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
provider_section_name,
"KYC_PERSONA_VALIDITY");
persona_unload_configuration (pd);
return NULL;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (ps->cfg,
provider_section_name,
"KYC_PERSONA_AUTH_TOKEN",
&pd->auth_token))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
provider_section_name,
"KYC_PERSONA_AUTH_TOKEN");
persona_unload_configuration (pd);
return NULL;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (ps->cfg,
provider_section_name,
"KYC_PERSONA_SALT",
&pd->salt))
{
uint32_t salt[8];
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_NONCE,
salt,
sizeof (salt));
pd->salt = GNUNET_STRINGS_data_to_string_alloc (salt,
sizeof (salt));
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (ps->cfg,
provider_section_name,
"KYC_PERSONA_SUBDOMAIN",
&pd->subdomain))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
provider_section_name,
"KYC_PERSONA_SUBDOMAIN");
persona_unload_configuration (pd);
return NULL;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (ps->cfg,
provider_section_name,
"KYC_PERSONA_POST_URL",
&pd->post_kyc_redirect_url))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
provider_section_name,
"KYC_PERSONA_POST_URL");
persona_unload_configuration (pd);
return NULL;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (ps->cfg,
provider_section_name,
"KYC_PERSONA_TEMPLATE_ID",
&pd->template_id))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
provider_section_name,
"KYC_PERSONA_TEMPLATE_ID");
persona_unload_configuration (pd);
return NULL;
}
{
char *auth;
GNUNET_asprintf (&auth,
"%s: Bearer %s",
MHD_HTTP_HEADER_AUTHORIZATION,
pd->auth_token);
pd->slist = curl_slist_append (NULL,
auth);
GNUNET_free (auth);
GNUNET_asprintf (&auth,
"%s: %s",
MHD_HTTP_HEADER_ACCEPT,
"application/json");
pd->slist = curl_slist_append (pd->slist,
"Persona-Version: "
PERSONA_VERSION);
GNUNET_free (auth);
}
return pd;
}
/**
* Cancel KYC check initiation.
*
* @param[in] ih handle of operation to cancel
*/
static void
persona_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);
curl_slist_free_all (ih->slist);
GNUNET_free (ih);
}
/**
* Function called when we're done processing the
* HTTP POST "/api/v1/inquiries" 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 struct TALER_KYCLOGIC_ProviderDetails *pd = ih->pd;
const json_t *j = response;
char *url;
json_t *data;
const char *type;
const char *inquiry_id;
const char *persona_account_id;
const char *ename;
unsigned int eline;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("type",
&type),
GNUNET_JSON_spec_string ("id",
&inquiry_id),
GNUNET_JSON_spec_end ()
};
ih->job = NULL;
switch (response_code)
{
case MHD_HTTP_CREATED:
/* handled below */
break;
case MHD_HTTP_UNAUTHORIZED:
case MHD_HTTP_FORBIDDEN:
{
const char *msg;
msg = json_string_value (
json_object_get (
json_array_get (
json_object_get (j,
"errors"),
0),
"title"));
ih->cb (ih->cb_cls,
TALER_EC_EXCHANGE_KYC_CHECK_AUTHORIZATION_FAILED,
NULL,
NULL,
NULL,
msg);
persona_initiate_cancel (ih);
return;
}
case MHD_HTTP_NOT_FOUND:
case MHD_HTTP_CONFLICT:
{
const char *msg;
msg = json_string_value (
json_object_get (
json_array_get (
json_object_get (j,
"errors"),
0),
"title"));
ih->cb (ih->cb_cls,
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY,
NULL,
NULL,
NULL,
msg);
persona_initiate_cancel (ih);
return;
}
case MHD_HTTP_BAD_REQUEST:
case MHD_HTTP_UNPROCESSABLE_ENTITY:
{
const char *msg;
GNUNET_break (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
msg = json_string_value (
json_object_get (
json_array_get (
json_object_get (j,
"errors"),
0),
"title"));
ih->cb (ih->cb_cls,
TALER_EC_EXCHANGE_KYC_GENERIC_LOGIC_BUG,
NULL,
NULL,
NULL,
msg);
persona_initiate_cancel (ih);
return;
}
case MHD_HTTP_TOO_MANY_REQUESTS:
{
const char *msg;
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Rate limiting requested:\n");
json_dumpf (j,
stderr,
JSON_INDENT (2));
msg = json_string_value (
json_object_get (
json_array_get (
json_object_get (j,
"errors"),
0),
"title"));
ih->cb (ih->cb_cls,
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_RATE_LIMIT_EXCEEDED,
NULL,
NULL,
NULL,
msg);
persona_initiate_cancel (ih);
return;
}
default:
{
char *err;
GNUNET_break_op (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
GNUNET_asprintf (&err,
"Unexpected HTTP status %u from Persona\n",
(unsigned int) response_code);
ih->cb (ih->cb_cls,
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY,
NULL,
NULL,
NULL,
err);
GNUNET_free (err);
persona_initiate_cancel (ih);
return;
}
}
data = json_object_get (j,
"data");
if (NULL == data)
{
GNUNET_break_op (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
persona_initiate_cancel (ih);
return;
}
if (GNUNET_OK !=
GNUNET_JSON_parse (data,
spec,
&ename,
&eline))
{
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,
ename);
persona_initiate_cancel (ih);
return;
}
persona_account_id
= json_string_value (
json_object_get (
json_object_get (
json_object_get (
json_object_get (data,
"relationships"),
"account"),
"data"),
"id"));
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Starting inquiry %s for Persona account %s\n",
inquiry_id,
persona_account_id);
GNUNET_asprintf (&url,
"https://%s.withpersona.com/verify"
"?inquiry-id=%s",
pd->subdomain,
inquiry_id);
ih->cb (ih->cb_cls,
TALER_EC_NONE,
url,
persona_account_id,
inquiry_id,
NULL);
GNUNET_free (url);
persona_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 *
persona_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://withpersona.com/api/v1/inquiries");
{
char *payto_s;
char *proof_url;
char ref_s[24];
GNUNET_snprintf (ref_s,
sizeof (ref_s),
"%llu",
(unsigned long long) ih->legitimization_uuid);
payto_s = GNUNET_STRINGS_data_to_string_alloc (&ih->h_payto,
sizeof (ih->h_payto));
/* NOTE: check here that exchange_base_url ends
with a '/'? */
GNUNET_asprintf (&proof_url,
"%skyc-proof/%s/%s",
pd->ps->exchange_base_url,
payto_s,
pd->section);
body = GNUNET_JSON_PACK (
GNUNET_JSON_pack_object_steal (
"data",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_object_steal (
"attributes",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("inquiry_template_id",
pd->template_id),
GNUNET_JSON_pack_string ("reference_id",
ref_s),
GNUNET_JSON_pack_string ("redirect_uri",
proof_url)
)))));
GNUNET_assert (NULL != body);
GNUNET_free (payto_s);
GNUNET_free (proof_url);
}
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));
ih->ctx.disable_compression = true;
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;
}
json_decref (body);
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);
{
char *ikh;
GNUNET_asprintf (&ikh,
"Idempotency-Key: %llu-%s",
(unsigned long long) ih->legitimization_uuid,
pd->salt);
ih->slist = curl_slist_append (NULL,
ikh);
GNUNET_free (ikh);
}
GNUNET_CURL_extend_headers (ih->job,
ih->slist);
return ih;
}
/**
* Cancel KYC proof.
*
* @param[in] ph handle of operation to cancel
*/
static void
persona_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->provider_user_id);
GNUNET_free (ph->inquiry_id);
GNUNET_free (ph);
}
/**
* Call @a ph callback with the operation result.
*
* @param ph proof handle to generate reply for
* @param status status to return
* @param account_id account to return
* @param inquiry_id inquiry ID to supply
* @param http_status HTTP status to use
* @param template template to instantiate
* @param[in] body body for the template to use (reference
* is consumed)
*/
static void
proof_generic_reply (struct TALER_KYCLOGIC_ProofHandle *ph,
enum TALER_KYCLOGIC_KycStatus status,
const char *account_id,
const char *inquiry_id,
unsigned int http_status,
const char *template,
json_t *body)
{
struct MHD_Response *resp;
enum GNUNET_GenericReturnValue ret;
struct GNUNET_TIME_Absolute expiration;
if (TALER_KYCLOGIC_STATUS_SUCCESS == status)
expiration = GNUNET_TIME_relative_to_absolute (ph->pd->validity);
else
expiration = GNUNET_TIME_UNIT_ZERO_ABS;
ret = TALER_TEMPLATING_build (ph->connection,
&http_status,
template,
NULL,
NULL,
body,
&resp);
json_decref (body);
if (GNUNET_SYSERR == ret)
{
GNUNET_break (0);
resp = NULL; /* good luck */
}
ph->cb (ph->cb_cls,
status,
account_id,
inquiry_id,
expiration,
http_status,
resp);
}
/**
* Call @a ph callback with HTTP error response.
*
* @param ph proof handle to generate reply for
* @param inquiry_id inquiry ID to supply
* @param http_status HTTP status to use
* @param template template to instantiate
* @param[in] body body for the template to use (reference
* is consumed)
*/
static void
proof_reply_error (struct TALER_KYCLOGIC_ProofHandle *ph,
const char *inquiry_id,
unsigned int http_status,
const char *template,
json_t *body)
{
proof_generic_reply (ph,
TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
NULL, /* user id */
inquiry_id,
http_status,
template,
body);
}
/**
* Function called when we're done processing the
* HTTP "/api/v1/verifications/{verification-id}" 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_proof_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_KYCLOGIC_ProofHandle *ph = cls;
const json_t *j = response;
const json_t *data = json_object_get (j,
"data");
ph->job = NULL;
switch (response_code)
{
case MHD_HTTP_OK:
{
const char *inquiry_id;
const char *account_id;
const char *type = NULL;
json_t *attributes;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("type",
&type),
GNUNET_JSON_spec_string ("id",
&inquiry_id),
GNUNET_JSON_spec_json ("attributes",
&attributes),
GNUNET_JSON_spec_end ()
};
if ( (NULL == data) ||
(GNUNET_OK !=
GNUNET_JSON_parse (data,
spec,
NULL, NULL)) ||
(0 != strcmp (type,
"inquiry")) )
{
GNUNET_break_op (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-logic-failure",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
GNUNET_JSON_pack_string ("persona_inquiry_id",
inquiry_id),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data"),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *) data))));
break;
}
{
const char *status; /* "completed", what else? */
const char *reference_id; /* or legitimization number */
const char *expired_at = NULL; /* often 'null' format: "2022-08-18T10:14:26.000Z" */
struct GNUNET_JSON_Specification ispec[] = {
GNUNET_JSON_spec_string ("status",
&status),
GNUNET_JSON_spec_string ("reference_id",
&reference_id),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_string ("expired_at",
&expired_at),
NULL),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (attributes,
ispec,
NULL, NULL))
{
GNUNET_break_op (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-invalid-response",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
GNUNET_JSON_pack_string ("persona_inquiry_id",
inquiry_id),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-attributes"),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *) data))));
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
{
unsigned long long idr;
char dummy;
if ( (1 != sscanf (reference_id,
"%llu%c",
&idr,
&dummy)) ||
(idr != ph->process_row) )
{
GNUNET_break_op (0);
proof_reply_error (ph,
inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-invalid-response",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
GNUNET_JSON_pack_string ("persona_inquiry_id",
inquiry_id),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-attributes-reference_id"),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
}
if (0 != strcmp (inquiry_id,
ph->inquiry_id))
{
GNUNET_break_op (0);
proof_reply_error (ph,
inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-invalid-response",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
GNUNET_JSON_pack_string ("persona_inquiry_id",
inquiry_id),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-id"),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
account_id = json_string_value (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
data,
"relationships"),
"account"),
"data"),
"id"));
if (0 != strcmp (status,
"completed"))
{
proof_generic_reply (ph,
TALER_KYCLOGIC_STATUS_FAILED,
account_id,
inquiry_id,
MHD_HTTP_OK,
"persona-kyc-failed",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
GNUNET_JSON_pack_string ("persona_inquiry_id",
inquiry_id),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
if (NULL == account_id)
{
GNUNET_break_op (0);
json_dumpf (data,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-invalid-response",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
GNUNET_JSON_pack_string ("persona_inquiry_id",
inquiry_id),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-relationships-account-data-id"),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
}
{
struct MHD_Response *resp;
struct GNUNET_TIME_Absolute expiration;
expiration = GNUNET_TIME_relative_to_absolute (ph->pd->validity);
resp = MHD_create_response_from_buffer (0,
"",
MHD_RESPMEM_PERSISTENT);
GNUNET_break (MHD_YES ==
MHD_add_response_header (resp,
MHD_HTTP_HEADER_LOCATION,
ph->pd->post_kyc_redirect_url));
TALER_MHD_add_global_headers (resp);
ph->cb (ph->cb_cls,
TALER_KYCLOGIC_STATUS_SUCCESS,
account_id,
inquiry_id,
expiration,
MHD_HTTP_SEE_OTHER,
resp);
}
GNUNET_JSON_parse_free (ispec);
}
GNUNET_JSON_parse_free (spec);
break;
}
case MHD_HTTP_BAD_REQUEST:
case MHD_HTTP_NOT_FOUND:
case MHD_HTTP_CONFLICT:
case MHD_HTTP_UNPROCESSABLE_ENTITY:
/* These are errors with this code */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-logic-failure",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
case MHD_HTTP_UNAUTHORIZED:
/* These are failures of the exchange operator */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Refused access with HTTP status code %u\n",
(unsigned int) response_code);
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_INTERNAL_SERVER_ERROR,
"persona-exchange-unauthorized",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_ACCESS_REFUSED),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
case MHD_HTTP_PAYMENT_REQUIRED:
/* These are failures of the exchange operator */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Refused access with HTTP status code %u\n",
(unsigned int) response_code);
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_INTERNAL_SERVER_ERROR,
"persona-exchange-unpaid",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_ACCESS_REFUSED),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
case MHD_HTTP_REQUEST_TIMEOUT:
/* These are networking issues */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_GATEWAY_TIMEOUT,
"persona-network-timeout",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_TIMEOUT),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
case MHD_HTTP_TOO_MANY_REQUESTS:
/* This is a load issue */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_SERVICE_UNAVAILABLE,
"persona-load-failure",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_RATE_LIMIT_EXCEEDED),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
/* This is an issue with Persona */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-provider-failure",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_PROOF_BACKEND_ERROR),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
default:
/* This is an issue with Persona */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
proof_reply_error (ph,
ph->inquiry_id,
MHD_HTTP_BAD_GATEWAY,
"persona-invalid-response",
GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("persona_http_status",
response_code),
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-relationships-account-data-id"),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_incref ("data",
(json_t *)
data))));
break;
}
persona_proof_cancel (ph);
}
/**
* Check KYC status and return final result 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 process_row row in the legitimization processes table the legitimization is for
* @param provider_user_id user ID (or NULL) the proof is for
* @param inquiry_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 *
persona_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 process_row,
const char *provider_user_id,
const char *inquiry_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;
ph->process_row = process_row;
ph->h_payto = *account_id;
/* Note: we do not expect this to be non-NULL */
if (NULL != provider_user_id)
ph->provider_user_id = GNUNET_strdup (provider_user_id);
if (NULL != inquiry_id)
ph->inquiry_id = GNUNET_strdup (inquiry_id);
GNUNET_asprintf (&ph->url,
"https://withpersona.com/api/v1/inquiries/%s",
inquiry_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,
ph->url));
ph->job = GNUNET_CURL_job_add2 (ps->curl_ctx,
eh,
pd->slist,
&handle_proof_finished,
ph);
return ph;
}
/**
* Cancel KYC webhook execution.
*
* @param[in] wh handle of operation to cancel
*/
static void
persona_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->inquiry_id);
GNUNET_free (wh->url);
GNUNET_free (wh);
}
/**
* Call @a wh callback with the operation result.
*
* @param wh proof handle to generate reply for
* @param status status to return
* @param account_id account to return
* @param inquiry_id inquiry ID to supply
* @param http_status HTTP status to use
*/
static void
webhook_generic_reply (struct TALER_KYCLOGIC_WebhookHandle *wh,
enum TALER_KYCLOGIC_KycStatus status,
const char *account_id,
const char *inquiry_id,
unsigned int http_status)
{
struct MHD_Response *resp;
struct GNUNET_TIME_Absolute expiration;
if (TALER_KYCLOGIC_STATUS_SUCCESS == status)
expiration = GNUNET_TIME_relative_to_absolute (wh->pd->validity);
else
expiration = GNUNET_TIME_UNIT_ZERO_ABS;
resp = MHD_create_response_from_buffer (0,
"",
MHD_RESPMEM_PERSISTENT);
TALER_MHD_add_global_headers (resp);
wh->cb (wh->cb_cls,
wh->process_row,
&wh->h_payto,
account_id,
wh->pd->section,
inquiry_id,
status,
expiration,
http_status,
resp);
}
/**
* Call @a wh callback with HTTP error response.
*
* @param wh proof handle to generate reply for
* @param inquiry_id inquiry ID to supply
* @param http_status HTTP status to use
*/
static void
webhook_reply_error (struct TALER_KYCLOGIC_WebhookHandle *wh,
const char *inquiry_id,
unsigned int http_status)
{
webhook_generic_reply (wh,
TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
NULL, /* user id */
inquiry_id,
http_status);
}
/**
* 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;
const json_t *data = json_object_get (j,
"data");
wh->job = NULL;
switch (response_code)
{
case MHD_HTTP_OK:
{
const char *inquiry_id;
const char *account_id;
const char *type = NULL;
json_t *attributes;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("type",
&type),
GNUNET_JSON_spec_string ("id",
&inquiry_id),
GNUNET_JSON_spec_json ("attributes",
&attributes),
GNUNET_JSON_spec_end ()
};
if ( (NULL == data) ||
(GNUNET_OK !=
GNUNET_JSON_parse (data,
spec,
NULL, NULL)) ||
(0 != strcmp (type,
"inquiry")) )
{
GNUNET_break_op (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
inquiry_id,
MHD_HTTP_BAD_GATEWAY);
break;
}
{
const char *status; /* "completed", what else? */
const char *reference_id; /* or legitimization number */
const char *expired_at = NULL; /* often 'null' format: "2022-08-18T10:14:26.000Z" */
struct GNUNET_JSON_Specification ispec[] = {
GNUNET_JSON_spec_string ("status",
&status),
GNUNET_JSON_spec_string ("reference_id",
&reference_id),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_string ("expired_at",
&expired_at),
NULL),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (attributes,
ispec,
NULL, NULL))
{
GNUNET_break_op (0);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
inquiry_id,
MHD_HTTP_BAD_GATEWAY);
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
{
unsigned long long idr;
char dummy;
if ( (1 != sscanf (reference_id,
"%llu%c",
&idr,
&dummy)) ||
(idr != wh->process_row) )
{
GNUNET_break_op (0);
webhook_reply_error (wh,
inquiry_id,
MHD_HTTP_BAD_GATEWAY);
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
}
if (0 != strcmp (inquiry_id,
wh->inquiry_id))
{
GNUNET_break_op (0);
webhook_reply_error (wh,
inquiry_id,
MHD_HTTP_BAD_GATEWAY);
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
account_id = json_string_value (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
data,
"relationships"),
"account"),
"data"),
"id"));
if (0 != strcmp (status,
"completed"))
{
webhook_generic_reply (wh,
TALER_KYCLOGIC_STATUS_FAILED,
account_id,
inquiry_id,
MHD_HTTP_OK);
GNUNET_JSON_parse_free (ispec);
GNUNET_JSON_parse_free (spec);
break;
}
if (NULL == account_id)
{
GNUNET_break_op (0);
json_dumpf (data,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
inquiry_id,
MHD_HTTP_BAD_GATEWAY);
break;
}
webhook_generic_reply (wh,
TALER_KYCLOGIC_STATUS_SUCCESS,
account_id,
inquiry_id,
MHD_HTTP_OK);
GNUNET_JSON_parse_free (ispec);
}
GNUNET_JSON_parse_free (spec);
break;
}
case MHD_HTTP_BAD_REQUEST:
case MHD_HTTP_NOT_FOUND:
case MHD_HTTP_CONFLICT:
case MHD_HTTP_UNPROCESSABLE_ENTITY:
/* These are errors with this code */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_BAD_GATEWAY);
break;
case MHD_HTTP_UNAUTHORIZED:
/* These are failures of the exchange operator */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Refused access with HTTP status code %u\n",
(unsigned int) response_code);
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_INTERNAL_SERVER_ERROR);
break;
case MHD_HTTP_PAYMENT_REQUIRED:
/* These are failures of the exchange operator */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Refused access with HTTP status code %u\n",
(unsigned int) response_code);
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_INTERNAL_SERVER_ERROR);
break;
case MHD_HTTP_REQUEST_TIMEOUT:
/* These are networking issues */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_GATEWAY_TIMEOUT);
break;
case MHD_HTTP_TOO_MANY_REQUESTS:
/* This is a load issue */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_SERVICE_UNAVAILABLE);
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
/* This is an issue with Persona */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_BAD_GATEWAY);
break;
default:
/* This is an issue with Persona */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"PERSONA failed with response %u:\n",
(unsigned int) response_code);
json_dumpf (j,
stderr,
JSON_INDENT (2));
webhook_reply_error (wh,
wh->inquiry_id,
MHD_HTTP_BAD_GATEWAY);
break;
}
persona_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->task = NULL;
wh->cb (wh->cb_cls,
wh->process_row,
(0 == wh->process_row)
? NULL
: &wh->h_payto,
wh->pd->section,
NULL,
wh->inquiry_id, /* provider legi ID */
TALER_KYCLOGIC_STATUS_PROVIDER_FAILED,
GNUNET_TIME_UNIT_ZERO_ABS, /* expiration */
wh->response_code,
wh->resp);
persona_webhook_cancel (wh);
}
/**
* Function called with the provider details and
* associated plugin closures for matching logics.
*
* @param cls closure
* @param pd provider details of a matching logic
* @param plugin_cls closure of the plugin
* @return #GNUNET_OK to continue to iterate
*/
static enum GNUNET_GenericReturnValue
locate_details_cb (
void *cls,
const struct TALER_KYCLOGIC_ProviderDetails *pd,
void *plugin_cls)
{
struct TALER_KYCLOGIC_WebhookHandle *wh = cls;
/* This type-checks 'pd' */
GNUNET_assert (plugin_cls == wh->ps);
if (0 == strcmp (pd->template_id,
wh->template_id))
{
wh->pd = pd;
return GNUNET_NO;
}
return GNUNET_OK;
}
/**
* Check KYC status and return result for Webhook. We do NOT implement the
* authentication check proposed by the PERSONA documentation, as it would
* allow an attacker who learns the access token to easily bypass the KYC
* checks. Instead, we insist on explicitly requesting the KYC status from the
* provider (at least on success).
*
* @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 *
persona_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;
enum GNUNET_DB_QueryStatus qs;
const char *persona_inquiry_id;
const char *auth_header;
/* Persona webhooks are expected by logic, not by template */
GNUNET_break_op (NULL == pd);
wh = GNUNET_new (struct TALER_KYCLOGIC_WebhookHandle);
wh->cb = cb;
wh->cb_cls = cb_cls;
wh->ps = ps;
wh->connection = connection;
wh->pd = pd;
auth_header = MHD_lookup_connection_value (connection,
MHD_HEADER_KIND,
MHD_HTTP_HEADER_AUTHORIZATION);
if ( (NULL != ps->webhook_token) &&
(0 != strcmp (ps->webhook_token,
auth_header)) )
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Invalid authorization header `%s' received for Persona webhook\n",
auth_header);
wh->resp = TALER_MHD_MAKE_JSON_PACK (
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_WEBHOOK_UNAUTHORIZED),
GNUNET_JSON_pack_string ("detail",
"unexpected 'Authorization' header"));
wh->response_code = MHD_HTTP_UNAUTHORIZED;
wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
wh);
return wh;
}
wh->template_id
= json_string_value (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
body,
"data"),
"attributes"),
"payload"),
"data"),
"relationships"),
"inquiry_template"),
"data"),
"id"));
if (NULL == wh->template_id)
{
GNUNET_break_op (0);
json_dumpf (body,
stderr,
JSON_INDENT (2));
wh->resp = TALER_MHD_MAKE_JSON_PACK (
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-attributes-payload-data-id"),
GNUNET_JSON_pack_object_incref ("webhook_body",
(json_t *) body));
wh->response_code = MHD_HTTP_BAD_REQUEST;
wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
wh);
return wh;
}
TALER_KYCLOGIC_kyc_get_details ("persona",
&locate_details_cb,
wh);
if (NULL == wh->pd)
{
GNUNET_break_op (0);
json_dumpf (body,
stderr,
JSON_INDENT (2));
wh->resp = TALER_MHD_MAKE_JSON_PACK (
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_LOGIC_UNKNOWN),
GNUNET_JSON_pack_string ("detail",
wh->template_id),
GNUNET_JSON_pack_object_incref ("webhook_body",
(json_t *) body));
wh->response_code = MHD_HTTP_BAD_REQUEST;
wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
wh);
return wh;
}
persona_inquiry_id
= json_string_value (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
json_object_get (
body,
"data"),
"attributes"),
"payload"),
"data"),
"id"));
if (NULL == persona_inquiry_id)
{
GNUNET_break_op (0);
json_dumpf (body,
stderr,
JSON_INDENT (2));
wh->resp = TALER_MHD_MAKE_JSON_PACK (
TALER_JSON_pack_ec (
TALER_EC_EXCHANGE_KYC_GENERIC_PROVIDER_UNEXPECTED_REPLY),
GNUNET_JSON_pack_string ("detail",
"data-attributes-payload-data-id"),
GNUNET_JSON_pack_object_incref ("webhook_body",
(json_t *) body));
wh->response_code = MHD_HTTP_BAD_REQUEST;
wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
wh);
return wh;
}
qs = plc (plc_cls,
wh->pd->section,
persona_inquiry_id,
&wh->h_payto,
&wh->process_row);
if (qs < 0)
{
wh->resp = TALER_MHD_make_error (TALER_EC_GENERIC_DB_FETCH_FAILED,
"provider-legitimization-lookup");
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 Persona kyc-webhook for unknown verification ID `%s'\n",
persona_inquiry_id);
wh->resp = TALER_MHD_make_error (
TALER_EC_EXCHANGE_KYC_PROOF_REQUEST_UNKNOWN,
persona_inquiry_id);
wh->response_code = MHD_HTTP_NOT_FOUND;
wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
wh);
return wh;
}
wh->inquiry_id = GNUNET_strdup (persona_inquiry_id);
eh = curl_easy_init ();
if (NULL == eh)
{
GNUNET_break (0);
wh->resp = TALER_MHD_make_error (
TALER_EC_GENERIC_ALLOCATION_FAILURE,
NULL);
wh->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
wh->task = GNUNET_SCHEDULER_add_now (&async_webhook_reply,
wh);
return wh;
}
GNUNET_asprintf (&wh->url,
"https://withpersona.com/api/v1/inquiries/%s",
persona_inquiry_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,
wh->url));
wh->job = GNUNET_CURL_job_add2 (ps->curl_ctx,
eh,
wh->pd->slist,
&handle_webhook_finished,
wh);
return wh;
}
/**
* Initialize persona logic plugin
*
* @param cls a configuration instance
* @return NULL on error, otherwise a `struct TALER_KYCLOGIC_Plugin`
*/
void *
libtaler_plugin_kyclogic_persona_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;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (ps->cfg,
"kyclogic-persona",
"WEBHOOK_AUTH_TOKEN",
&ps->webhook_token))
{
/* optional */
ps->webhook_token = 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
= &persona_load_configuration;
plugin->unload_configuration
= &persona_unload_configuration;
plugin->initiate
= &persona_initiate;
plugin->initiate_cancel
= &persona_initiate_cancel;
plugin->proof
= &persona_proof;
plugin->proof_cancel
= &persona_proof_cancel;
plugin->webhook
= &persona_webhook;
plugin->webhook_cancel
= &persona_webhook_cancel;
return plugin;
}
/**
* Unload authorization plugin
*
* @param cls a `struct TALER_KYCLOGIC_Plugin`
* @return NULL (always)
*/
void *
libtaler_plugin_kyclogic_persona_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->webhook_token);
GNUNET_free (ps);
GNUNET_free (plugin);
return NULL;
}
/* end of plugin_kyclogic_persona.c */