Though for the sake of readability I'd rather go for a hash of boundaries.
you may also want to limit the max length of your password.
use strict;
use warnings;
use Data::Dump qw/pp dd/;
use List::Util qw/min/;
sub pw_not_ok {
my $pw = shift;
my $short =
sub { "is too short" };
my $lowercase =
sub { /[a-z]/ ? "" : "has no lowercase character" };
my $uppercase =
sub { /[A-Z]/ ? "" : "has no uppercase character" }; ### UPDATE
+D
my $number =
sub { /[0-9]/ ? "" : "has no number" };
my $special =
sub {
if (
/[\x21-\x2F]/ ||
/[\x3A-\x40]/ ||
/[\x5B-\x60]/ ||
/[\x7B-\x7E]/
) {
return "";
} else {
return "has no special characters";
}
};
my $pass = sub {""};
my %rules_by_max_length =
(
7 => [ $short ],
11 => [ $lowercase, $uppercase, $number ,$special ],
15 => [ $lowercase, $uppercase, $number ],
19 => [ $lowercase, $uppercase ],
50 => [ $pass ]
);
my $len = length $pw;
return "too long" if $len >= 50;
my @boundaries = sort { $a <=> $b } keys %rules_by_max_length;
for my $boundary ( @boundaries ) {
next if $len > $boundary;
my $rules = $rules_by_max_length{$boundary};
for my $rule ( @$rules ) {
$_ = $pw;
if ( my $err = $rule->() ) {
return $err;
}
}
}
return;
}
# --------- Tests
for my $pw (
"A" x 3 ,
"A" x 7 ,
"A" x 11,
"a" x 5 . "A" x 3,
"a" x 5 . "A" x 3 . "1",
"a" x 5 . "A" x 3 . "1" .":",
"a" x 24,
"a" x 100,
){
if ( my $err = pw_not_ok($pw) ){
warn "ERROR: $pw is $err\n";
} else {
print "OK: $pw\n"
}
}
ERROR: AAA is is too short
ERROR: AAAAAAA is is too short
ERROR: AAAAAAAAAAA is has no lowercase character
ERROR: aaaaaAAA is has no number
ERROR: aaaaaAAA1 is has no special characters
ERROR: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa is too long
OK: aaaaaAAA1:
OK: aaaaaaaaaaaaaaaaaaaaaaaa
UPDATE
see Re^6: Efficient way to verify scalar contents
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