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/*
This file is part of TALER
Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)
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, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file util/wireformats.c
* @brief helper functions for JSON processing using libjansson
* @author Sree Harsha Totakura <sreeharsha@totakura.in>
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include "taler_util.h"
/**
* Shorthand for exit jumps.
*/
#define EXITIF(cond) \
do { \
if (cond) { GNUNET_break (0); goto EXITIF_exit; } \
} while (0)
/**
* Shorthand for JSON parsing related exit jumps.
*/
#define UNPACK_EXITIF(cond) \
do { \
if (cond) { TALER_json_warn (error); goto EXITIF_exit; } \
} while (0)
/* Taken from GNU gettext */
/**
* Entry in the country table.
*/
struct table_entry
{
/**
* 2-Character international country code.
*/
const char *code;
/**
* Long English name of the country.
*/
const char *english;
};
/* Keep the following table in sync with gettext.
WARNING: the entries should stay sorted according to the code */
/**
* List of country codes.
*/
static const struct table_entry country_table[] =
{
{ "AE", "U.A.E." },
{ "AF", "Afghanistan" },
{ "AL", "Albania" },
{ "AM", "Armenia" },
{ "AN", "Netherlands Antilles" },
{ "AR", "Argentina" },
{ "AT", "Austria" },
{ "AU", "Australia" },
{ "AZ", "Azerbaijan" },
{ "BA", "Bosnia and Herzegovina" },
{ "BD", "Bangladesh" },
{ "BE", "Belgium" },
{ "BG", "Bulgaria" },
{ "BH", "Bahrain" },
{ "BN", "Brunei Darussalam" },
{ "BO", "Bolivia" },
{ "BR", "Brazil" },
{ "BT", "Bhutan" },
{ "BY", "Belarus" },
{ "BZ", "Belize" },
{ "CA", "Canada" },
{ "CG", "Congo" },
{ "CH", "Switzerland" },
{ "CI", "Cote d'Ivoire" },
{ "CL", "Chile" },
{ "CM", "Cameroon" },
{ "CN", "People's Republic of China" },
{ "CO", "Colombia" },
{ "CR", "Costa Rica" },
{ "CS", "Serbia and Montenegro" },
{ "CZ", "Czech Republic" },
{ "DE", "Germany" },
{ "DK", "Denmark" },
{ "DO", "Dominican Republic" },
{ "DZ", "Algeria" },
{ "EC", "Ecuador" },
{ "EE", "Estonia" },
{ "EG", "Egypt" },
{ "ER", "Eritrea" },
{ "ES", "Spain" },
{ "ET", "Ethiopia" },
{ "FI", "Finland" },
{ "FO", "Faroe Islands" },
{ "FR", "France" },
{ "GB", "United Kingdom" },
{ "GD", "Caribbean" },
{ "GE", "Georgia" },
{ "GL", "Greenland" },
{ "GR", "Greece" },
{ "GT", "Guatemala" },
{ "HK", "Hong Kong" },
{ "HK", "Hong Kong S.A.R." },
{ "HN", "Honduras" },
{ "HR", "Croatia" },
{ "HT", "Haiti" },
{ "HU", "Hungary" },
{ "ID", "Indonesia" },
{ "IE", "Ireland" },
{ "IL", "Israel" },
{ "IN", "India" },
{ "IQ", "Iraq" },
{ "IR", "Iran" },
{ "IS", "Iceland" },
{ "IT", "Italy" },
{ "JM", "Jamaica" },
{ "JO", "Jordan" },
{ "JP", "Japan" },
{ "KE", "Kenya" },
{ "KG", "Kyrgyzstan" },
{ "KH", "Cambodia" },
{ "KR", "South Korea" },
{ "KW", "Kuwait" },
{ "KZ", "Kazakhstan" },
{ "LA", "Laos" },
{ "LB", "Lebanon" },
{ "LI", "Liechtenstein" },
{ "LK", "Sri Lanka" },
{ "LT", "Lithuania" },
{ "LU", "Luxembourg" },
{ "LV", "Latvia" },
{ "LY", "Libya" },
{ "MA", "Morocco" },
{ "MC", "Principality of Monaco" },
{ "MD", "Moldava" },
{ "MD", "Moldova" },
{ "ME", "Montenegro" },
{ "MK", "Former Yugoslav Republic of Macedonia" },
{ "ML", "Mali" },
{ "MM", "Myanmar" },
{ "MN", "Mongolia" },
{ "MO", "Macau S.A.R." },
{ "MT", "Malta" },
{ "MV", "Maldives" },
{ "MX", "Mexico" },
{ "MY", "Malaysia" },
{ "NG", "Nigeria" },
{ "NI", "Nicaragua" },
{ "NL", "Netherlands" },
{ "NO", "Norway" },
{ "NP", "Nepal" },
{ "NZ", "New Zealand" },
{ "OM", "Oman" },
{ "PA", "Panama" },
{ "PE", "Peru" },
{ "PH", "Philippines" },
{ "PK", "Islamic Republic of Pakistan" },
{ "PL", "Poland" },
{ "PR", "Puerto Rico" },
{ "PT", "Portugal" },
{ "PY", "Paraguay" },
{ "QA", "Qatar" },
{ "RE", "Reunion" },
{ "RO", "Romania" },
{ "RS", "Serbia" },
{ "RU", "Russia" },
{ "RW", "Rwanda" },
{ "SA", "Saudi Arabia" },
{ "SE", "Sweden" },
{ "SG", "Singapore" },
{ "SI", "Slovenia" },
{ "SK", "Slovak" },
{ "SN", "Senegal" },
{ "SO", "Somalia" },
{ "SR", "Suriname" },
{ "SV", "El Salvador" },
{ "SY", "Syria" },
{ "TH", "Thailand" },
{ "TJ", "Tajikistan" },
{ "TM", "Turkmenistan" },
{ "TN", "Tunisia" },
{ "TR", "Turkey" },
{ "TT", "Trinidad and Tobago" },
{ "TW", "Taiwan" },
{ "TZ", "Tanzania" },
{ "UA", "Ukraine" },
{ "US", "United States" },
{ "UY", "Uruguay" },
{ "VA", "Vatican" },
{ "VE", "Venezuela" },
{ "VN", "Viet Nam" },
{ "YE", "Yemen" },
{ "ZA", "South Africa" },
{ "ZW", "Zimbabwe" }
};
/**
* Country code comparator function, for binary search with bsearch().
*
* @param ptr1 pointer to a `struct table_entry`
* @param ptr2 pointer to a `struct table_entry`
* @return result of strncmp()'ing the 2-digit country codes of the entries
*/
static int
cmp_country_code (const void *ptr1,
const void *ptr2)
{
const struct table_entry *cc1 = ptr1;
const struct table_entry *cc2 = ptr2;
return strncmp (cc1->code, cc2->code, 2);
}
/**
* Validates given IBAN according to the European Banking Standards. See:
* http://www.europeanpaymentscouncil.eu/documents/ECBS%20IBAN%20standard%20EBS204_V3.2.pdf
*
* @param iban the IBAN number to validate
* @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
*/
static int
validate_iban (const char *iban)
{
char cc[2];
char ibancpy[35];
struct table_entry cc_entry;
unsigned int len;
char *nbuf;
unsigned int i;
unsigned int j;
unsigned long long dividend;
unsigned long long remainder;
int nread;
int ret;
len = strlen (iban);
if (len > 34)
return GNUNET_NO;
strncpy (cc, iban, 2);
strncpy (ibancpy, iban + 4, len - 4);
strncpy (ibancpy + len - 4, iban, 4);
ibancpy[len] = '\0';
cc_entry.code = cc;
cc_entry.english = NULL;
if (NULL ==
bsearch (&cc_entry,
country_table,
sizeof (country_table) / sizeof (struct table_entry),
sizeof (struct table_entry),
&cmp_country_code))
return GNUNET_NO;
nbuf = GNUNET_malloc ((len * 2) + 1);
for (i=0, j=0; i < len; i++)
{
if (isalpha ((int) ibancpy[i]))
{
EXITIF(2 != snprintf(&nbuf[j],
3,
"%2u",
(ibancpy[i] - 'A' + 10)));
j += 2;
continue;
}
nbuf[j] = ibancpy[i];
j++;
}
for (j=0;'\0' != nbuf[j];j++)
GNUNET_assert (isdigit(nbuf[j]));
GNUNET_assert (sizeof(dividend) >= 8);
remainder = 0;
for (i=0; i<j; i+=16)
{
EXITIF (1 !=
(ret = sscanf (&nbuf[i],
"%16llu %n",
÷nd,
&nread)));
if (0 != remainder)
dividend += remainder * (pow (10, nread));
remainder = dividend % 97;
}
if (1 == remainder)
{
GNUNET_free (nbuf);
return GNUNET_YES;
}
EXITIF_exit:
GNUNET_free (nbuf);
return GNUNET_NO;
}
/**
* Validate SEPA account details.
*
* @param wire JSON with the SEPA details
* @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
*/
static int
validate_sepa (const json_t *wire)
{
json_error_t error;
const char *type;
const char *iban;
const char *name;
const char *bic;
uint64_t r;
const char *address;
UNPACK_EXITIF (0 != json_unpack_ex
((json_t *) wire,
&error, JSON_STRICT,
"{"
"s:s " /* TYPE: sepa */
"s:s " /* IBAN: iban */
"s:s " /* name: beneficiary name */
"s:s " /* BIC: beneficiary bank's BIC */
"s:i " /* r: random 64-bit integer nounce */
"s?s " /* address: address of the beneficiary */
"}",
"type", &type,
"IBAN", &iban,
"name", &name,
"bic", &bic,
"r", &r,
"address", &address));
if (1 != validate_iban (iban))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"IBAN `%s' invalid\n",
iban);
return GNUNET_NO;
}
return GNUNET_YES;
EXITIF_exit:
return GNUNET_NO;
}
/**
* Validate TEST account details. The "test" format is used
* for testing, so this validator does nothing.
*
* @param wire JSON with the TEST details
* @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
*/
static int
validate_test (const json_t *wire)
{
return GNUNET_YES;
}
/**
* Handler for a wire format.
*/
struct FormatHandler
{
/**
* Type handled by this format handler.
*/
const char *type;
/**
* Function to call to evaluate the format.
*
* @param wire the JSON to evaluate
* @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
*/
int (*handler)(const json_t *wire);
};
/**
* Check if the given wire format JSON object is correctly formatted
*
* @param allowed NULL-terminated array of allowed wire format types
* @param wire the JSON wire format object
* @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
*/
int
TALER_json_validate_wireformat (const char **allowed,
const json_t *wire)
{
static const struct FormatHandler format_handlers[] = {
{ "SEPA", &validate_sepa },
{ "TEST", &validate_test },
{ NULL, NULL}
};
unsigned int i;
const char *stype;
json_error_t error;
UNPACK_EXITIF (0 != json_unpack_ex
((json_t *) wire,
&error, 0,
"{s:s}",
"type", &stype));
for (i=0;NULL != allowed[i];i++)
if (0 == strcasecmp (allowed[i],
stype))
break;
if (NULL == allowed[i])
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Wireformat `%s' does not match mint's allowed formats\n",
stype);
return GNUNET_NO;
}
for (i=0;NULL != format_handlers[i].type;i++)
if (0 == strcasecmp (format_handlers[i].type,
stype))
return format_handlers[i].handler (wire);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Wireformat `%s' not supported\n",
stype);
return GNUNET_NO;
EXITIF_exit:
return GNUNET_NO;
}
/* end of wireformats.c */
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