Perl Implementation
MIME::Base64 is a Perl module for base-64 encoding and decoding. You can read about this module at http://www.perldoc.com/perl5.6.1/lib/MIME/Base64.html.
You can encode and decode strings using the MIME::Base64 encode_base64 and decode_base64 methods:
use MIME::Base64;
$encoded = encode_base64('Aladdin:open sesame');
$decoded = decode_base64($encoded);