/*
This file is part of TALER
Copyright (C) 2015-2023 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
*/
/**
* @file lib/exchange_api_kyc_info.c
* @brief Implementation of the /kyc-info/$AT request
* @author Christian Grothoff
*/
#include "platform.h"
#include /* just for HTTP status codes */
#include
#include
#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-info Handle
*/
struct TALER_EXCHANGE_KycInfoHandle
{
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_EXCHANGE_KycInfoCallback kyc_info_cb;
/**
* Closure for @e cb.
*/
void *kyc_info_cb_cls;
};
/**
* Parse the provided kyc_infoage data from the "200 OK" response
* for one of the coins.
*
* @param[in,out] lh kyc_info handle (callback may be zero'ed out)
* @param json json reply with the data for one coin
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
static enum GNUNET_GenericReturnValue
parse_kyc_info_ok (struct TALER_EXCHANGE_KycInfoHandle *lh,
const json_t *json)
{
const json_t *jrequirements = NULL;
const json_t *jvoluntary_checks = NULL;
struct TALER_EXCHANGE_KycProcessClientInformation lr = {
.hr.reply = json,
.hr.http_status = MHD_HTTP_OK
};
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_array_const ("requirements",
&jrequirements),
GNUNET_JSON_spec_bool ("is_and_combinator",
&lr.details.ok.is_and_combinator),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_object_const ("voluntary_checks",
&jvoluntary_checks),
NULL),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (json,
spec,
NULL, NULL))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
lr.details.ok.vci_length
= (unsigned int) json_object_size (jvoluntary_checks);
if ( ((size_t) lr.details.ok.vci_length)
!= json_object_size (jvoluntary_checks))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
lr.details.ok.requirements_length
= json_array_size (jrequirements);
if ( ((size_t) lr.details.ok.requirements_length)
!= json_array_size (jrequirements))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
{
struct TALER_EXCHANGE_VoluntaryCheckInformation vci[
GNUNET_NZL (lr.details.ok.vci_length)];
struct TALER_EXCHANGE_RequirementInformation requirements[
GNUNET_NZL (lr.details.ok.requirements_length)];
const char *name;
const json_t *jreq;
const json_t *jvc;
size_t off;
memset (vci,
0,
sizeof (vci));
memset (requirements,
0,
sizeof (requirements));
json_array_foreach ((json_t *) jrequirements, off, jreq)
{
struct TALER_EXCHANGE_RequirementInformation *req = &requirements[off];
struct GNUNET_JSON_Specification ispec[] = {
GNUNET_JSON_spec_string ("form",
&req->form),
GNUNET_JSON_spec_string ("description",
&req->description),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_object_const ("description_i18n",
&req->description_i18n),
NULL),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_string ("id",
&req->id),
NULL),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (jreq,
ispec,
NULL, NULL))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
}
GNUNET_assert (off == lr.details.ok.requirements_length);
off = 0;
json_object_foreach ((json_t *) jvoluntary_checks, name, jvc)
{
struct TALER_EXCHANGE_VoluntaryCheckInformation *vc = &vci[off++];
struct GNUNET_JSON_Specification ispec[] = {
GNUNET_JSON_spec_string ("description",
&vc->description),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_object_const ("description_i18n",
&vc->description_i18n),
NULL),
GNUNET_JSON_spec_end ()
};
vc->name = name;
if (GNUNET_OK !=
GNUNET_JSON_parse (jvc,
ispec,
NULL, NULL))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
}
GNUNET_assert (off == lr.details.ok.vci_length);
lr.details.ok.vci = vci;
lr.details.ok.requirements = requirements;
lh->kyc_info_cb (lh->kyc_info_cb_cls,
&lr);
lh->kyc_info_cb = NULL;
return GNUNET_OK;
}
}
/**
* Function called when we're done processing the
* HTTP /kyc-info/$AT request.
*
* @param cls the `struct TALER_EXCHANGE_KycInfoHandle`
* @param response_code HTTP response code, 0 on error
* @param response parsed JSON result, NULL on error
*/
static void
handle_kyc_info_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_EXCHANGE_KycInfoHandle *lh = cls;
const json_t *j = response;
struct TALER_EXCHANGE_KycProcessClientInformation lr = {
.hr.reply = j,
.hr.http_status = (unsigned int) response_code
};
lh->job = NULL;
switch (response_code)
{
case 0:
lr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
case MHD_HTTP_OK:
if (GNUNET_OK !=
parse_kyc_info_ok (lh,
j))
{
GNUNET_break_op (0);
lr.hr.http_status = 0;
lr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
break;
}
GNUNET_assert (NULL == lh->kyc_info_cb);
TALER_EXCHANGE_kyc_info_cancel (lh);
return;
case MHD_HTTP_NO_CONTENT:
break;
case MHD_HTTP_BAD_REQUEST:
lr.hr.ec = TALER_JSON_get_error_code (j);
lr.hr.hint = TALER_JSON_get_error_hint (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_NOT_FOUND:
lr.hr.ec = TALER_JSON_get_error_code (j);
lr.hr.hint = TALER_JSON_get_error_hint (j);
/* Nothing really to verify, exchange says this coin was not melted; we
should pass the JSON reply to the application */
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
lr.hr.ec = TALER_JSON_get_error_code (j);
lr.hr.hint = TALER_JSON_get_error_hint (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);
lr.hr.ec = TALER_JSON_get_error_code (j);
lr.hr.hint = TALER_JSON_get_error_hint (j);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d for exchange /kyc-info\n",
(unsigned int) response_code,
(int) lr.hr.ec);
break;
}
if (NULL != lh->kyc_info_cb)
lh->kyc_info_cb (lh->kyc_info_cb_cls,
&lr);
TALER_EXCHANGE_kyc_info_cancel (lh);
}
struct TALER_EXCHANGE_KycInfoHandle *
TALER_EXCHANGE_kyc_info (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_AccountAccessTokenP *token,
const char *if_none_match,
struct GNUNET_TIME_Relative timeout,
TALER_EXCHANGE_KycInfoCallback cb,
void *cb_cls)
{
struct TALER_EXCHANGE_KycInfoHandle *lh;
CURL *eh;
char arg_str[sizeof (struct TALER_AccountAccessTokenP) * 2 + 32];
unsigned int tms
= (unsigned int) timeout.rel_value_us
/ GNUNET_TIME_UNIT_MILLISECONDS.rel_value_us;
struct curl_slist *job_headers = NULL;
{
char at_str[sizeof (struct TALER_AccountAccessTokenP) * 2];
char *end;
end = GNUNET_STRINGS_data_to_string (
token,
sizeof (*token),
at_str,
sizeof (at_str));
*end = '\0';
GNUNET_snprintf (arg_str,
sizeof (arg_str),
"kyc-info/%s",
at_str);
}
lh = GNUNET_new (struct TALER_EXCHANGE_KycInfoHandle);
lh->kyc_info_cb = cb;
lh->kyc_info_cb_cls = cb_cls;
{
char timeout_str[32];
GNUNET_snprintf (timeout_str,
sizeof (timeout_str),
"%u",
tms);
lh->url = TALER_url_join (url,
arg_str,
"timeout_ms",
(0 == tms)
? NULL
: timeout_str,
NULL);
}
if (NULL == lh->url)
{
GNUNET_free (lh);
return NULL;
}
eh = TALER_EXCHANGE_curl_easy_get_ (lh->url);
if (NULL == eh)
{
GNUNET_break (0);
GNUNET_free (lh->url);
GNUNET_free (lh);
return NULL;
}
if (0 != tms)
{
GNUNET_break (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_TIMEOUT_MS,
(long) (tms + 100L)));
}
job_headers = curl_slist_append (job_headers,
"Content-Type: application/json");
if (NULL != if_none_match)
{
char *hdr;
GNUNET_asprintf (&hdr,
"%s: %s",
MHD_HTTP_HEADER_IF_NONE_MATCH,
if_none_match);
job_headers = curl_slist_append (job_headers,
hdr);
GNUNET_free (hdr);
}
lh->job = GNUNET_CURL_job_add2 (ctx,
eh,
job_headers,
&handle_kyc_info_finished,
lh);
curl_slist_free_all (job_headers);
return lh;
}
void
TALER_EXCHANGE_kyc_info_cancel (struct TALER_EXCHANGE_KycInfoHandle *lh)
{
if (NULL != lh->job)
{
GNUNET_CURL_job_cancel (lh->job);
lh->job = NULL;
}
GNUNET_free (lh->url);
GNUNET_free (lh);
}
/* end of exchange_api_kyc_info.c */