# short numbers and numbers with letters are no longer kosher.
# 1 Feb 2001 - 0.22 released, new maintainer, MakeMaker installation
# 3 May 2001 - 0.23 released, silly bug in test.pl
+# 11 Jun 2001 - 0.24. added enRoute, JCB, BankCard, rewrote with regexes
#
# Copyright 1995,1996,1997 Jon Orwant. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
-# Version 0.23. Module list status is "Rdpf."
+# Version 0.24. Module list status is "Rdpf."
require 5;
return "Not a credit card" unless length($number) >= 13 && 0+$number;
- return "VISA card" if substr($number,0,1) == "4";
- return "MasterCard" if substr($number,0,1) == "5";
- return "Discover card" if substr($number,0,1) == "6";
- return "American Express card" if substr($number,0,2) == "37";
- return "Diner's Club, Transmedia, or other dining/entertainment card" if substr($number,0,1) == "3";
+ return "VISA card" if $number =~ /^4\d{12}\d{3}?$/;
+ return "MasterCard" if $number =~ /^5[1-5]\d{14}$/;
+ return "Discover card" if $number =~ /^6011\d{12}$/;
+ return "American Express card" if $number =~ /^3[47]\d{13}/;
+ return "Diner's Club/Carte Blanche"
+ if $number =~ /^3(0[0-5]|[68]\d)\d{11}$/;
+ return "enRoute" if $number =~ /^2(014|149)\d{11}$/;
+ return "JCB" if $number =~ /^3\d{15}$/
+ || $number =~ /^(2131|1800)\d{11}$/;
+ return "BankCard" if $number =~ /^56(10\d\d|022[1-5])\d{10}$/;
return "Unknown";
}
+# from http://perl.about.com/compute/perl/library/nosearch/P073000.htm
+# Card Type Prefix Length
+# MasterCard 51-55 16
+# VISA 4 13, 16
+# American Express (AMEX) 34, 37 15
+# Diners Club/Carte Blanche 300-305, 36, 38 14
+# enRoute 2014, 2149 15
+# Discover 6011 16
+# JCB 3 16
+# JCB 2131, 1800 15
+#
+# from Neale Banks <neale@lowendale.com.au>
+# According to a booklet I have from Westpac (an Aussie bank), a card number
+# starting with 5610 or 56022[1-5] is a BankCard
+# BankCards have exactly 16 digits.
+
sub generate_last_digit {
my ($number) = @_;
my ($i, $sum, $weight);