November 2016 – Stephen R Lang

This article simply contains how to test a few languages with a hello world script and a way to test mail functionality.

PHP

PHP script that will output hello world:

[root@web01 ~]# vim hello_world.php
#!/usr/bin/php
<?php
print "Hello World!\n";
?>

[root@web01 ~]# php hello_world.php 
Hello World!

PHP script to test mail functionality:

[root@web01 ~]# vim email_test.php
#!/usr/bin/php
<?php
$hostname = shell_exec('hostname');
$to = "[email protected]";
$subject = "Test mail";
$message = "Hello! This is a simple email message.";
$from = "root@" . $hostname;
$headers = "From:" . $from;
$parameters = "-f " . $from;
mail($to,$subject,$message,$headers,$parameters);
echo "Mail Sent.\n";
?>

[root@web01 ~]# php email_test.php
Mail Sent.

PHP script to test MySQL access:

[root@web01 ~]# db_test.php
<?php
# Fill our vars and run on cli
$dbname = 'DATABASE_NAME';
$dbuser = 'DATABASE_USER';
$dbpass = 'DATABASE_PASS';
$dbhost = 'DATABASE_HOST';
$link = mysqli_connect($dbhost, $dbuser, $dbpass) or die("Unable to Connect to '$dbhost'");
mysqli_select_db($link, $dbname) or die("Could not open the db '$dbname'");
$test_query = "SHOW TABLES FROM $dbname";
$result = mysqli_query($link, $test_query);
$tblCnt = 0;
while($tbl = mysqli_fetch_array($result)) {
$tblCnt++;
}
if (!$tblCnt) {
echo "There are no tables<br />\n";
} else {
echo "There are $tblCnt tables<br />\n";
}

[root@web01 ~]# php db_test.php
There are no tables

Perl

Perl script that will output hello world:

[root@web01 ~]# vim hello_world.pl
#!/usr/bin/perl
print "Hello World!\n";

[root@web01 ~]# perl hello_world.pl
Hello World!

Perl script to test mail functionality:

[root@web01 ~]# vim email_test.pl
#!/usr/bin/perl
use Sys::Hostname;
$hostname = hostname;
$to = '[email protected]';
$subject = 'Test mail';
$message = 'Hello! This is a simple email message.';
$from = 'root@' . $hostname;
open (MAIL,'|/usr/sbin/sendmail -t');
print MAIL "To: $to\n";
print MAIL "From: $from\n";
print MAIL "Subject: $subject\n\n";
print MAIL $message;
close (MAIL);
print "Mail Sent.\n";

[root@web01 ~]# perl email_test.pl
Mail Sent.

Python
Python script that will output hello world:

[root@web01 ~]# vim hello_world.py
#!/usr/bin/python
print "Hello World!";

[root@web01 ~]# python hello_world.py
Hello World!

Python script to test mail functionality:

[root@web01 ~]# vim email_test.py
#!/usr/bin/python
import smtplib
import socket
hostname = socket.getfqdn()
mailfrom = 'root@' + hostname
to = '[email protected]'
subject = 'Test mail'
message = 'Hello! This is a simple email message.'
smtpserver = smtplib.SMTP("127.0.0.1",25)
header = 'To:' + to + '\n' + 'From: ' + mailfrom + '\n' + 'Subject:' + subject + '\n\n'
smtpserver.sendmail(mailfrom, to, header + message)
print 'Mail Sent.'
smtpserver.close()

[root@web01 ~]# python email_test.py
Mail Sent.

Ruby

Ruby script that will output hello world:

[root@web01 ~]# vim hello_world.rb
#!/usr/bin/ruby
puts 'Hello World!'

[root@web01 ~]# ruby hello_world.rb
Hello World!

Ruby script to test mail functionality:

[root@web01 ~]# vim email_test.rb
#!/usr/bin/ruby
require 'net/smtp'
require 'socket'
hostname = Socket.gethostname
from = 'root@' + hostname
to = '[email protected]'
subject = 'Test mail'
message = 'Hello! This is a simple email message.'
msg = <<EOF
From: #{from}
To: #{to}
Subject: #{subject}
#{message}
EOF
Net::SMTP.start('localhost').send_message msg, from, to
puts 'Mail Sent.'

[root@web01 ~]# ruby email_test.rb
Mail Sent.

Month: November 2016

CVE-2016-2183 SWEET32 Birthday attacks

Quick programming language test scripts