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/*
This file is part of TALER
Copyright (C) 2023 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. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-exchange-httpd_aml-decision-get.c
* @brief Return summary information about AML decision
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include <pthread.h>
#include "taler_json_lib.h"
#include "taler_mhd_lib.h"
#include "taler_signatures.h"
#include "taler-exchange-httpd.h"
#include "taler_exchangedb_plugin.h"
#include "taler-exchange-httpd_aml-decision.h"
#include "taler-exchange-httpd_metrics.h"
/**
* Maximum number of records we return per request.
*/
#define MAX_RECORDS 1024
/**
* Callback with KYC attributes about a particular user.
*
* @param[in,out] cls closure with a `json_t *` array to update
* @param h_payto account for which the attribute data is stored
* @param provider_section provider that must be checked
* @param collection_time when was the data collected
* @param expiration_time when does the data expire
* @param enc_attributes_size number of bytes in @a enc_attributes
* @param enc_attributes encrypted attribute data
*/
static void
kyc_attribute_cb (
void *cls,
const struct TALER_PaytoHashP *h_payto,
const char *provider_section,
struct GNUNET_TIME_Timestamp collection_time,
struct GNUNET_TIME_Timestamp expiration_time,
size_t enc_attributes_size,
const void *enc_attributes)
{
json_t *kyc_attributes = cls;
json_t *attributes;
attributes = TALER_CRYPTO_kyc_attributes_decrypt (&TEH_attribute_key,
enc_attributes,
enc_attributes_size);
GNUNET_break (NULL != attributes);
GNUNET_assert (
0 ==
json_array_append (
kyc_attributes,
GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("provider_section",
provider_section),
GNUNET_JSON_pack_timestamp ("collection_time",
collection_time),
GNUNET_JSON_pack_timestamp ("expiration_time",
expiration_time),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_object_steal ("attributes",
attributes))
)));
}
/**
* Return historic AML decision(s).
*
* @param[in,out] cls closure with a `json_t *` array to update
* @param new_threshold new monthly threshold that would trigger an AML check
* @param new_state AML decision status
* @param decision_time when was the decision made
* @param justification human-readable text justifying the decision
* @param decider_pub public key of the staff member
* @param decider_sig signature of the staff member
*/
static void
aml_history_cb (
void *cls,
const struct TALER_Amount *new_threshold,
enum TALER_AmlDecisionState new_state,
struct GNUNET_TIME_Timestamp decision_time,
const char *justification,
const struct TALER_AmlOfficerPublicKeyP *decider_pub,
const struct TALER_AmlOfficerSignatureP *decider_sig)
{
json_t *aml_history = cls;
GNUNET_assert (
0 ==
json_array_append (
aml_history,
GNUNET_JSON_PACK (
GNUNET_JSON_pack_data_auto ("decider_pub",
decider_pub),
GNUNET_JSON_pack_string ("justification",
justification),
TALER_JSON_pack_amount ("new_threshold",
new_threshold),
GNUNET_JSON_pack_int64 ("new_state",
new_state),
GNUNET_JSON_pack_timestamp ("decision_time",
decision_time)
)));
}
MHD_RESULT
TEH_handler_aml_decision_get (
struct TEH_RequestContext *rc,
const struct TALER_AmlOfficerPublicKeyP *officer_pub,
const char *const args[])
{
struct TALER_PaytoHashP h_payto;
if ( (NULL == args[0]) ||
(GNUNET_OK !=
GNUNET_STRINGS_string_to_data (args[0],
strlen (args[0]),
&h_payto,
sizeof (h_payto))) )
{
GNUNET_break_op (0);
return TALER_MHD_reply_with_error (rc->connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"h_payto");
}
if (NULL != args[1])
{
GNUNET_break_op (0);
return TALER_MHD_reply_with_error (rc->connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_ENDPOINT_UNKNOWN,
args[1]);
}
{
json_t *aml_history;
json_t *kyc_attributes;
enum GNUNET_DB_QueryStatus qs;
bool none = false;
aml_history = json_array ();
GNUNET_assert (NULL != aml_history);
qs = TEH_plugin->select_aml_history (TEH_plugin->cls,
&h_payto,
&aml_history_cb,
aml_history);
switch (qs)
{
case GNUNET_DB_STATUS_HARD_ERROR:
case GNUNET_DB_STATUS_SOFT_ERROR:
json_decref (aml_history);
GNUNET_break (0);
return TALER_MHD_reply_with_error (rc->connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_FETCH_FAILED,
NULL);
case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
none = true;
break;
case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
none = false;
break;
}
kyc_attributes = json_array ();
GNUNET_assert (NULL != kyc_attributes);
qs = TEH_plugin->select_kyc_attributes (TEH_plugin->cls,
&h_payto,
&kyc_attribute_cb,
kyc_attributes);
switch (qs)
{
case GNUNET_DB_STATUS_HARD_ERROR:
case GNUNET_DB_STATUS_SOFT_ERROR:
json_decref (aml_history);
json_decref (kyc_attributes);
GNUNET_break (0);
return TALER_MHD_reply_with_error (rc->connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_FETCH_FAILED,
NULL);
case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
if (none)
{
json_decref (aml_history);
json_decref (kyc_attributes);
return TALER_MHD_reply_static (
rc->connection,
MHD_HTTP_NO_CONTENT,
NULL,
NULL,
0);
}
break;
case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
break;
}
return TALER_MHD_REPLY_JSON_PACK (
rc->connection,
MHD_HTTP_OK,
GNUNET_JSON_pack_array_steal ("aml_history",
aml_history),
GNUNET_JSON_pack_array_steal ("kyc_attributes",
kyc_attributes));
}
}
/* end of taler-exchange-httpd_aml-decision_get.c */
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