source: server/fedora/config/etc/syslog-ng/d_zroot.pl @ 779

#!/usr/bin/perl

use strict;
use warnings;
use Sys::Hostname;
use Time::HiRes qw(ualarm);
use File::Temp;

our $ZCLASS = "scripts-auto";
our @USERS = qw/root logview/;

our %USERS;
@USERS{@USERS} = undef;

sub zwrite($;$$) {
    my ($message, $class, $instance) = @_;
    $class ||= $ZCLASS;
    $instance ||= 'root.'.hostname;
    open(ZWRITE, "|-", qw|/usr/bin/zwrite -d -O log -c|, $class, '-i', $instance, '-s', hostname) or die "Couldn't open zwrite";
    print ZWRITE $message;
    close(ZWRITE);
}

my %toclass;

my %sshkeys;

sub buildKeyMap($) {
    my ($file) = @_;
    open (KEYS, $file) or warn "Couldn't open $file: $!";
    while (<KEYS>) {
        chomp;
        my ($fingerprint, $comment) = parseKey($_);
        $sshkeys{$fingerprint} = $comment;
    }
    close(KEYS);
}

sub parseKey($) {
    my ($key) = @_;
    my $tmp = new File::Temp;
    print $tmp $key;
    close $tmp;
    open (KEYGEN, "-|", qw(/usr/bin/ssh-keygen -l -f), $tmp) or die "Couldn't call ssh-keygen: $!";
    my ($line) = <KEYGEN>;
    close(KEYGEN);
    my (undef, $fingerprint, undef) = split(' ', $line, 3);
    my (undef, undef, $comment) = split(' ', $key, 3);
    print "$fingerprint $comment";
    return ($fingerprint, $comment);
}

buildKeyMap("/root/.ssh/authorized_keys2");

while (1) {
    my @message = scalar(<>);
    eval {
        local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required
        ualarm(500*1000);
        while (<>) { push @message, $_; }
    };
    chomp @message;
    map { s/^(.*?): // } @message;
    %toclass = ();
    foreach my $message (@message) {
        sub sendmsg ($;$) {
            my ($message, $class) = @_;
            $class ||= $ZCLASS;
            $toclass{$class} .= $message."\n";
        }
        if ($message =~ m|Accepted (\S+) for (\S+)|) {
            sendmsg($message) if exists $USERS{$2}
        } elsif ($message =~ m|Authorized to (\S+),|) {
            sendmsg($message) if exists $USERS{$1};
        } elsif ($message =~ m|Root (\S+) shell|) {
            sendmsg($message);
        } elsif ($message =~ m|session \S+ for user (\S+)|) {
            sendmsg($message) if exists $USERS{$1};
        } elsif ($message =~ m|^Found matching (\w+) key: (\S+)|) {
            if ($sshkeys{$2}) {
                sendmsg($message." (".$sshkeys{$2}.")");
            } else {
                sendmsg($message." (UNKNOWN KEY)");
            }
        } elsif ($message =~ m|^Connection closed|) {
            # Do nothing
        } elsif ($message =~ m|^Closing connection to |) {
        } elsif ($message =~ m|^Connection from (\S+) port (\S+)|) {
        } elsif ($message =~ m|^Invalid user|) {
        } elsif ($message =~ m|^input_userauth_request: invalid user|) {
        } elsif ($message =~ m|^Received disconnect from|) {
        } elsif ($message =~ m|^fatal: Read from socket failed: Connection reset by peer$|) {
        } elsif ($message =~ m|^reverse mapping checking getaddrinfo|) {
        } elsif ($message =~ m|^pam_succeed_if\(sshd\:auth\)\:|) {
        } elsif ($message =~ m|^error: PAM: Authentication failure|) {
        } elsif ($message =~ m|^pam_unix\(sshd:auth\): authentication failure|) {
        } elsif ($message =~ m|^Postponed keyboard-interactive for invalid user |) {
        } elsif ($message =~ m|^Failed keyboard-interactive/pam for invalid user |) {
        } elsif ($message =~ m|^Postponed gssapi-with-mic for |) {
        } elsif ($message =~ m|^Address \S+ maps to \S+, but this does not map back to the address|) {
        } else {
            sendmsg($message, "scripts-spew");
        }
    }

    foreach my $class (keys %toclass) {
        zwrite($toclass{$class}, $class);
    }
}