added tacacsplus probe -- Gary.Mikula nasd.com

2 files changed, 258 insertions, 0 deletions

diff --git a/CHANGES b/CHANGES
index d338ce6..f8521ca 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,5 @@
+* added TacacsPlus probe -- tobi, Gary.Mikula nasd.com
+
 2006/7/14 -- released version 20060714_trunk
 
 2006/7/13 -- released version 20060713_trunk
diff --git a/lib/Smokeping/probes/TacacsPlus.pm b/lib/Smokeping/probes/TacacsPlus.pm
new file mode 100644
index 0000000..7cc9173
--- /dev/null
+++ b/lib/Smokeping/probes/TacacsPlus.pm
@@ -0,0 +1,256 @@
+package Smokeping::probes::TacacsPlus;
+
+=head1 301 Moved Permanently
+
+This is a Smokeping probe module. Please use the command 
+
+C<smokeping -man Smokeping::probes::TacacsPlus>
+
+to view the documentation or the command
+
+C<smokeping -makepod Smokeping::probes::TacacsPlus>
+
+to generate the POD document.
+
+=cut
+use strict;
+use base qw(Smokeping::probes::passwordchecker);
+use Authen::TacacsPlus;
+use Time::HiRes qw(gettimeofday sleep);
+use Carp;
+
+my $DEFAULTINTERVAL = 1;
+
+sub pod_hash {
+	return {
+		name => <<DOC,
+Smokeping::probes::TacacsPlus - a TacacsPlus authentication probe for SmokePing
+DOC
+		overview => <<DOC,
+Measures TacacsPlus authentication latency for SmokePing
+DOC
+		description => <<DOC,
+This probe measures TacacsPlus authentication latency for SmokePing.
+
+The username to be tested is specified in either the probe-specific or the 
+target-specific variable `username', with the target-specific one overriding
+the probe-specific one.
+
+The password can be specified either (in order of precedence, with
+the latter overriding the former) in the probe-specific variable
+`password', in an external file or in the target-specific variable
+`password'.  The location of this file is given in the probe-specific
+variable `passwordfile'. See Smokeping::probes::passwordchecker(3pm) for the
+format of this file (summary: colon-separated triplets of the form
+`<host>:<username>:<password>')
+
+The TacacsPlus protocol requires a shared secret between the server and the client.
+This secret can be specified either (in order of precedence, with the latter
+overriding the former) in the probe-specific variable `secret', in an external file
+or in the target-specific variable `secret'.
+This external file is located by the probe-specific variable `secretfile', and it should
+contain whitespace-separated pairs of the form `<host> <secret>'. Comments and blank lines
+are OK.
+
+The default TacacsPlus authentication type is ASCII.  PAP and CHAP are also available.
+See the Authen::TacacsPlus documentation for more information;
+
+The probe tries to be nice to the server and does not send authentication
+requests more frequently than once every X seconds, where X is the value
+of the target-specific "min_interval" variable ($DEFAULTINTERVAL by default).
+DOC
+		authors => <<'DOC',
+Gary Mikula <g2ugzm@hotmail.com>
+DOC
+		bugs => <<DOC,
+Not as yet....
+DOC
+	}
+}
+
+sub ProbeDesc {
+	return "TacacsPlus Authentication Attempts";
+}
+
+sub new {
+        my $proto = shift;
+        my $class = ref($proto) || $proto;
+        my $self = $class->SUPER::new(@_);
+
+	# no need for this if we run as a cgi
+	unless ($ENV{SERVER_SOFTWARE}) {
+	        if (defined $self->{properties}{secretfile}) {
+                        my @stat = stat($self->{properties}{secretfile});
+                        my $mode = $stat[2];
+                        carp("Warning: secret file $self->{properties}{secretfile} is world-readable\n") 
+                                if defined $mode and $mode & 04;
+			open(S, "<$self->{properties}{secretfile}") 
+				or croak("Error opening specified secret file $self->{properties}{secretfile}: $!");
+			while (<S>) {
+				chomp;
+				next unless /\S/;
+				next if /^\s*#/;
+				my ($host, $secret) = split;
+				carp("Line $. in $self->{properties}{secretfile} is invalid"), next 
+					unless defined $host and defined $secret;
+				$self->secret($host, $secret);
+			}
+			close S;
+	        }
+
+	}
+
+        return $self;
+}
+
+sub secret {
+	my $self = shift;
+	my $host = shift;
+	my $newval = shift;
+	
+	$self->{secret}{$host} = $newval if defined $newval;
+	return $self->{secret}{$host};
+}
+
+sub pingone {
+	my $self        = shift;
+	my $target      = shift;
+	my $host        = $target->{addr};
+	my $vars        = $target->{vars};
+	my $mininterval = $vars->{mininterval};
+	my $username    = $vars->{username};
+	my $authen_type = $vars->{authtype};
+	my $secret      = $self->secret($host);
+	my @times;
+	my $elapsed;
+	my $result;
+	my $start;
+	my $authen;
+	my $end;
+
+	if (defined $vars->{secret} and 
+	    $vars->{secret} ne ($self->{properties}{secret}||"")) {
+		$secret = $vars->{secret};
+	}
+	$secret ||= $self->{properties}{secret};
+
+	my $timeout = $vars->{timeout};
+
+	$self->do_log("Missing TacacsPlus secret for $host"), return 
+		unless defined $secret;
+
+	$self->do_log("Missing TacacsPlus username for $host"), return 
+		unless defined $username;
+
+	my $password = $self->password($host, $username);
+	if (defined $vars->{password} and
+	    $vars->{password} ne ($self->{properties}{password}||"")) {
+	    	$password = $vars->{password};
+	}
+	$password ||= $self->{properties}{password};
+
+	$self->do_log("Missing TacacsPlus password for $host/$username"), return 
+		unless defined $password;
+
+	my $port = $vars->{port};
+	$host .= ":$port" if defined $port;
+
+	for (1..$self->pings($target)) {
+		if (defined $elapsed) {
+			my $timeleft = $mininterval - $elapsed;
+			sleep $timeleft if $timeleft > 0;
+		}
+		$host =~ s/:[0-9]+//g;
+		my $r = new Authen::TacacsPlus(Host => $host, Key => $secret, Port =>$port);
+		if( $r ) {
+		  $start = gettimeofday();
+		  if( $authen_type eq 'PAP' ){
+		    $authen = &Authen::TacacsPlus::TAC_PLUS_AUTHEN_TYPE_PAP;
+		  }elsif( $authen_type eq 'CHAP'){
+		    $authen = &Authen::TacacsPlus::TAC_PLUS_AUTHEN_TYPE_CHAP;
+		  }else{
+		    $authen = &Authen::TacacsPlus::TAC_PLUS_AUTHEN_TYPE_ASCII;
+		  }
+		  if( $r->authen($username, $password, $authen ) ) {
+		    $end = gettimeofday();
+		    $elapsed = $end - $start;
+		    $self->do_debug("$host: TacacsPlus Authen Granted: $elapsed time");
+		    push @times, $elapsed;
+		    $r->close();
+		  }else{
+	            $self->do_log("Unable to Autenticate to:$host with ID:$username Key:$secret");
+		    $result = "Unable to Authenticate Msg: " . Authen::TacacsPlus::errmsg();
+		    $self->do_debug("$result");
+		  }
+		}else{
+	          $self->do_log("Unable to Create Constructor Authen::TacacsPlus for host:$host");
+		  $result = "Unable to Build Constructor Msg: " . Authen::TacacsPlus::errmsg();
+		  $self->do_debug("$result");
+		}
+	}
+	return sort { $a <=> $b } @times;
+}
+
+sub probevars {
+	my $class = shift;
+	my $h = $class->SUPER::probevars;
+	delete $h->{timeout};
+	return $class->_makevars($h, {
+		secretfile => {
+			_doc => <<DOC,
+A file containing the TacacsPlus shared secrets for the targets. It should contain
+whitespace-separated pairs of the form `<host> <secret>'. Comments and blank lines
+are OK.
+DOC
+			_example => '/another/place/secret',
+			_sub => sub {
+				my $val = shift;
+				-r $val or return "ERROR: secret file $val is not readable.";
+				return undef;
+			},
+		},
+	});
+}
+		
+sub targetvars {
+	my $class = shift;
+	return $class->_makevars($class->SUPER::targetvars, {
+		_mandatory => [ 'username' ],
+		username => {
+			_doc => 'The username to be tested.',
+			_example => 'test-user',
+		},
+		password => {
+			_doc => 'The password for the user, if not present in the password file.',
+			_example => 'test-password',
+		},
+		secret => {
+			_doc => 'The TacacsPlus shared secret for the target, if not present in the secrets file.',
+			_example => 'test-secret',
+		},
+		mininterval => {
+                        _default => $DEFAULTINTERVAL,
+                        _doc => "The minimum interval between each authentication request sent, in (possibly fractional) seconds.",
+                        _re => '(\d*\.)?\d+',
+		},
+		timeout => {
+			_default => 5,
+			_doc => "Timeout in seconds for the TacacsPlus queries.",
+			_re => '\d+',
+		},
+		port => {
+                        _default => 49,
+			_doc => 'The TacacsPlus port to be used',
+			_re => '\d+',
+			_example => 49,
+		},
+		authtype => {
+                        _default => 'ASCII',
+			_doc => 'The TacacsPlus Authentication type:ASCII(default), CHAP, PAP',
+			_re => '(ASCII|CHAP|PAP)',
+			_example => 'CHAP',
+		},
+	});
+}
+
+1;