Unicode::Security - Check scripts for confusables and mixed script strings
say "Nope" if mixed-script( "abcdef" );
say "Yea" if mixed-script( "aαbβ" );
say "Looks fake, Rick" if confusable('paypal',
say "No problem" unless confusable('Paypal', 'paypal');
say "Not confusing" unless whole-script-confusable("Latin", "DFRVz");
say "Confusing" if whole-script-confusable("Cyrillic", "scope");
Unicode::Security is a (partial) transcription of its namesake Perl
module. It incorporates confusion tables from the Unicode consortium
to detect which graphemes can cause confusion between two alphabets,
or which strings could be confused between two or more alphabets; also
detect when some strings have mixed scripts, which can be used to slip
by literal-string detectors.
The list of confusables is generated from the list published by the
unicode consortium using the scripts in
resources/script. You should
have received a copy along with this. The scripts generate two JSON
files, which must be moved by hand to the
directory. You don't need to do this unless you're certain that the
supplied copy is really out of sync with the real ones.
sub confusable( $string-a, $string-b )
Returns true if one string could be confusable for the other.
sub whole-script-comfusable( $script, $string )
Returns True if the string would be confusable for another written in the indicated script
sub mixed-script( $str )
True if the string includes several scripts,
sub mixed-script-confusable( $str )
True if the scripts present in a string could make it
confusable for any of them.
JJ Merelo firstname.lastname@example.org
COPYRIGHT AND LICENSE
Copyright 2019 JJ Merelo
This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.