Ein Lösungsweg

[Google weiß alles]

Ein paar Fehler der Fingerübung (überflüssige/falsche Zeilenumbrüche im Ergebnis) entfernt, strict hinzugefügt, mehr Tests. Verschönert.

#!/usr/bin/perl
use strict;

sub htpasswd_wrapper {
    ## return a fine hashed password for Apache 2.4 oder 2.2
    ## usage htpasswd_wrapper($passwd_clear, '2.4')
    ## or htpasswd_wrapper($passwd_clear, '2.2')

    my $passwd_clear = shift;
    my $version      = shift;
    my $sys          = '';
    my $passwd_hash  = '';
    $passwd_clear    =~ s/\"/\\\"/g;
    $passwd_clear    =~ s/\`/\\\`/g;

    if      ( $version eq "2.2" ) {
        $sys = "echo \"$passwd_clear\" | /usr/bin/htpasswd -in \"USER\";";
    } elsif ( $version eq "2.4" ) {
        $sys = "echo \"$passwd_clear\" | /usr/bin/htpasswd -Bin \"USER\";";
    }

    if ($sys) {
        $passwd_hash = `$sys`;
        $passwd_hash =~ s/\s+$//;
        $passwd_hash =~ s/^USER://;
        return $passwd_hash;
    } else {
        return '';
    }
}

## Tests:
my $passwd_hash;
$passwd_hash = htpasswd_wrapper("hallo", '2.4');
print $passwd_hash . "\n";
$passwd_hash = htpasswd_wrapper("hallo", '2.4');
print $passwd_hash . "\n";
print '-' x 60 . "\n";
$passwd_hash = htpasswd_wrapper("ha'llo", '2.4');
print $passwd_hash . "\n";
$passwd_hash = htpasswd_wrapper('ha"llo', '2.4');
print $passwd_hash . "\n";
$passwd_hash = htpasswd_wrapper('ha`ll`o', '2.4');
print $passwd_hash . "\n";
$passwd_hash = htpasswd_wrapper('ha` | less`o', '2.4');
print $passwd_hash . "\n";