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Subject Author Date
Regex for password checking Owen 05-23-2008
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Posted by Owen on May 23, 2008, 11:16 pm
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 Hi,

Just wondering if [:print:], with a pretest for a space would meet all
the requirements of a unix password. (mixed case, numbers, and
symbols)

Or is there some easier way of doing it?

TIA


Owen


#!/usr/bin/perl -w

use strict;

while (<DATA>) {
chomp;
my $new_pass = $_;
if ( $new_pass =~ / / ) { print "$new_pass Error, contains space
\n" }

#unless ( $new_pass =~ /[a-zA-Z0-9_\^\.\|\(\)\[\]\`~!@#%&*;:'"+,?
\/><]/ )
#unless ( $new_pass =~ /[[:alnum:]_\^\.\|\(\)\[\]\`~!@#%&*;:'"+,?
\/]></ )

#unless ( $new_pass =~ /[[:alnum:][:print:]]/ )
unless ( $new_pass =~ /[[:print:]]/ )
{
print "$new_pass Error, not printable\n";
}
}

__DATA__
Ddfrew3>
cF4444!,

Posted by Joe Smith on May 24, 2008, 2:44 am
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 Owen wrote:
> Just wondering if [:print:], with a pretest for a space would meet all
> the requirements of a unix password. (mixed case, numbers, and
> symbols)
>
> Or is there some easier way of doing it?

I'd say it is more straightforward to make such tests one at a time.

my $good = 0;
++$good if /[a-z]/;
++$good if /[A-Z]/;
++$good if /[0-9]/;
++$good if /\W/;
redo unless $good >= 3;

        -Joe
Doctor Who?

Posted by Tad J McClellan on May 24, 2008, 9:44 am
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> Just wondering if [:print:], with a pretest for a space would meet all
> the requirements of a unix password. (mixed case, numbers, and
> symbols)


A "unix password" _can_ have space characters in it.


--
Tad McClellan
email: perl -le "print scalar reverse qq/moc.noitatibaher0cmdat/"

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