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