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#! /usr/bin/perl -w -I ..
#
# check_ssh tests
#
#
use strict;
use warnings;
use Test::More;
use NPTest;
use JSON;
# Required parameters
my $ssh_host = getTestParameter("NP_SSH_HOST",
"A host providing SSH service",
"localhost");
my $host_nonresponsive = getTestParameter("NP_HOST_NONRESPONSIVE",
"The hostname of system not responsive to network requests",
"10.0.0.1" );
my $hostname_invalid = getTestParameter("NP_HOSTNAME_INVALID",
"An invalid (not known to DNS) hostname",
"nosuchhost" );
my $outputFormat = '--output-format mp-test-json';
plan tests => 24;
my $output;
my $result;
SKIP: {
skip "SSH_HOST must be defined", 6 unless $ssh_host;
my $result = NPTest->testCmd(
"./check_ssh -H $ssh_host" ." ". $outputFormat
);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "OK", "State was correct");
$result = NPTest->testCmd(
"./check_ssh -H $host_nonresponsive -t 2" ." ". $outputFormat
);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "CRITICAL", "State was correct");
$result = NPTest->testCmd(
"./check_ssh -H $hostname_invalid -t 2" ." ". $outputFormat
);
cmp_ok($result->return_code, '==', 3, "Exit with return code 3 (UNKNOWN)");
like($result->output, '/^check_ssh: Invalid hostname/', "Status text if command returned none (OK)");
}
SKIP: {
skip "No netcat available", 14 unless (system("which nc > /dev/null") == 0);
# netcat on linux (on debian) will just keep the socket open if not advised otherwise
# therefore we add -q to close it after two seconds after receiving the EOF from input
my $nc_flags = "-l 5003 -N";
#A valid protocol version control string has the form
# SSH-protoversion-softwareversion SP comments CR LF
#
# where `comments` is optional, protoversion is the SSH protocol version and
# softwareversion is an arbitrary string representing the server software version
my $found_version = 0;
open(NC, "echo 'SSH-2.0-nagiosplug.ssh.0.1' | nc ${nc_flags}|");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "OK", "State was correct");
# looking for the version
for my $subcheck (@{$output->{'checks'}}) {
if ($subcheck->{'output'} =~ /.*nagiosplug.ssh.0.1 \(protocol version: 2.0\).*/ ){
$found_version = 1;
}
}
cmp_ok($found_version, '==', 1, "Output OK");
close NC;
open(NC, "echo 'SSH-2.0-3.2.9.1' | nc ${nc_flags}|");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "OK", "State was correct");
$found_version = 0;
for my $subcheck (@{$output->{'checks'}}) {
if ($subcheck->{'output'} =~ /3.2.9.1 \(protocol version: 2.0\)/ ){
$found_version = 1;
}
}
cmp_ok($found_version, '==', 1, "Output OK");
close NC;
open(NC, "echo 'SSH-2.0-nagiosplug.ssh.0.1 this is a comment' | nc ${nc_flags} |");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003 -r nagiosplug.ssh.0.1" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "OK", "State was correct");
# looking for the version
$found_version = 0;
for my $subcheck (@{$output->{'checks'}}) {
if ($subcheck->{'output'} =~ /nagiosplug.ssh.0.1 \(protocol version: 2.0\)/ ){
$found_version = 1;
}
}
cmp_ok($found_version, '==', 1, "Output OK");
close NC;
open(NC, "echo 'SSH-' | nc ${nc_flags}|");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "CRITICAL", "Got invalid SSH protocol version control string");
close NC;
open(NC, "echo '' | nc ${nc_flags}|");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "CRITICAL", "No version control string received");
close NC;
open(NC, "echo 'Not a version control string' | nc ${nc_flags}|");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "CRITICAL", "No version control string received");
close NC;
#RFC 4253 permits servers to send any number of data lines prior to sending the protocol version control string
open(NC, "{ echo 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'; sleep 0.5;
echo 'BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB'; sleep 0.5;
echo 'CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC'; sleep 0.2;
echo 'DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD'; sleep 0.3;
printf 'EEEEEEEEEEEEEEEEEE'; sleep 0.2;
printf 'EEEEEEEEEEEEEEEEEE\n'; sleep 0.2;
echo 'Some\nPrepended\nData\nLines\n'; sleep 0.2;
echo 'SSH-2.0-nagiosplug.ssh.0.2';} | nc ${nc_flags}|");
sleep 0.1;
$result = NPTest->testCmd( "./check_ssh -H localhost -p 5003" ." ". $outputFormat);
cmp_ok($result->return_code, '==', 0, "Exit with return code 0 (OK)");
$output = decode_json($result->output);
is($output->{'state'}, "OK", "State was correct");
# looking for the version
$found_version = 0;
for my $subcheck (@{$output->{'checks'}}) {
if ($subcheck->{'output'} =~ /nagiosplug.ssh.0.2 \(protocol version: 2.0\)/ ){
$found_version = 1;
}
}
cmp_ok($found_version, '==', 1, "Output OK");
close NC;
}
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