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/*
This file is part of TALER
(C) 2014--2021 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Lesser 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 taler-merchant-httpd_helper.c
* @brief shared logic for various handlers
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <taler/taler_util.h>
#include <taler/taler_json_lib.h>
#include "taler-merchant-httpd_helper.h"
/**
* check @a payto_uris for well-formedness
*
* @param payto_uris JSON array of payto URIs (presumably)
* @return true if they are all valid URIs (and this is an array of strings)
*/
bool
TMH_payto_uri_array_valid (const json_t *payto_uris)
{
bool payto_ok = true;
if (! json_is_array (payto_uris))
{
GNUNET_break_op (0);
payto_ok = false;
}
else
{
unsigned int len = json_array_size (payto_uris);
for (unsigned int i = 0; i<len; i++)
{
json_t *payto_uri = json_array_get (payto_uris,
i);
const char *uri;
if (! json_is_string (payto_uri))
payto_ok = false;
uri = json_string_value (payto_uri);
/* Test for the same payto:// URI being given twice */
for (unsigned int j = 0; j<i; j++)
{
json_t *old_uri = json_array_get (payto_uris,
j);
if (json_equal (payto_uri,
old_uri))
{
GNUNET_break_op (0);
payto_ok = false;
break;
}
}
if (! payto_ok)
break;
if (GNUNET_SYSERR ==
TALER_JSON_validate_payto (uri))
{
payto_ok = false;
break;
}
}
}
return payto_ok;
}
bool
TMH_location_object_valid (const json_t *location)
{
return true; // FIXME
}
// FIXME
bool
TMH_i18n_object_valid (const json_t *i18n)
{
return true; // FIXME
}
// FIXME
bool
TMH_image_data_url_valid (const char *image_data_url)
{
if (0 == strcmp (image_data_url,
""))
return true;
if (0 != strncasecmp ("data:image/",
image_data_url,
strlen ("data:image/")))
return false;
if (NULL == strstr (image_data_url,
";base64,"))
return false;
// FIXME: write generic URI syntax validation */
return true;
}
bool
TMH_taxes_array_valid (const json_t *taxes)
{
json_t *tax;
size_t idx;
if (! json_is_array (taxes))
return false;
json_array_foreach (taxes, idx, tax)
{
struct TALER_Amount amount;
const char *name;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("name",
&name),
TALER_JSON_spec_amount_any ("tax",
&amount),
GNUNET_JSON_spec_end ()
};
enum GNUNET_GenericReturnValue res;
res = TALER_MHD_parse_json_data (NULL,
tax,
spec);
if (GNUNET_OK != res)
{
GNUNET_break_op (0);
return false;
}
}
return true;
}
struct TMH_WireMethod *
TMH_setup_wire_account (const char *payto_uri)
{
struct GNUNET_HashCode salt;
struct TMH_WireMethod *wm;
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_NONCE,
&salt,
sizeof (salt));
wm = GNUNET_new (struct TMH_WireMethod);
wm->j_wire = GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("payto_uri",
payto_uri),
GNUNET_JSON_pack_data_auto ("salt",
&salt));
GNUNET_assert (NULL != wm->j_wire);
/* This also tests for things like the IBAN being malformed */
GNUNET_assert (GNUNET_OK ==
TALER_JSON_merchant_wire_signature_hash (wm->j_wire,
&wm->h_wire));
wm->wire_method
= TALER_payto_get_method (payto_uri);
GNUNET_assert (NULL != wm->wire_method); /* checked earlier */
wm->active = true;
return wm;
}
enum GNUNET_GenericReturnValue
TMH_check_auth_config (struct MHD_Connection *connection,
const json_t *jauth,
const char **auth_token)
{
bool auth_wellformed = false;
const char *auth_method = json_string_value (json_object_get (jauth,
"method"));
*auth_token = NULL;
if (NULL == auth_method)
{
GNUNET_break_op (0);
}
else if (0 == strcmp (auth_method,
"external"))
{
auth_wellformed = true;
}
else if (0 == strcmp (auth_method,
"token"))
{
*auth_token = json_string_value (json_object_get (jauth,
"token"));
if (NULL == *auth_token)
{
GNUNET_break_op (0);
}
else
{
if (0 != strncasecmp (RFC_8959_PREFIX,
*auth_token,
strlen (RFC_8959_PREFIX)))
GNUNET_break_op (0);
else
auth_wellformed = true;
}
}
if (! auth_wellformed)
{
GNUNET_break_op (0);
return (MHD_YES ==
TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_MERCHANT_PRIVATE_POST_INSTANCES_BAD_AUTH,
"bad authentication config")) ?
GNUNET_NO : GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Generate binary UUID from client-provided UUID-string.
*
* @param uuids string intpu
* @param[out] uuid set to binary UUID
*/
void
TMH_uuid_from_string (const char *uuids,
struct GNUNET_Uuid *uuid)
{
struct GNUNET_HashCode hc;
GNUNET_CRYPTO_hash (uuids,
strlen (uuids),
&hc);
GNUNET_static_assert (sizeof (hc) > sizeof (*uuid));
memcpy (uuid,
&hc,
sizeof (*uuid));
}
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