Nate Lewis > FWS-V2 > FWS::V2::Safety

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Module Version: 1.13091122   Source  

NAME ^

FWS::V2::Safety - Framework Sites version 2 safe data wrappers

VERSION ^

Version 1.13091122

SYNOPSIS ^

    use FWS::V2;
    
    my $fws = FWS::V2->new();

    #
    # each one of these statements will clean the string up to make it "safe"
    # depending on its context
    #    

    print $fws->safeDir( "../../this/could/be/dangrous" );
    
    print $fws->safeFile( "../../i-am-trying-to-change-dir.ext" );
    
    print $fws->safeSQL( "this ' or 1=1 or ' is super bad" );

DESCRIPTION ^

FWS version 2 safety methods are used for security when using unknown parameters that could be malicious. Whenever data is passed to another method it should be wrapped in its appropriate safety wrapper under the guidance of each method.

METHODS ^

safeDir

All directories or directry with file combination should be wrapped in this method before being used. It will remove any context that could change its scope to higher than its given location. When using directories ALWAYS prepend them with $fws->{fileDir} or $fws->{secureFileDir} to ensure they root path is always in a known location to further prevent any tampering. NEVER use a directory that is not prepended with a known depth!

In addition this also will convert any directory backslashes to forward slashes in case a dos style windows path was tossed into the directory.

    #
    # will return //this/could/be/dangerous
    #
    print $fws->safeDir( "../../this/could/be/dangrous" );

    #
    # will return this/is/fine
    #
    print $fws->safeDir( "this/is/fine" );

    #
    # using this with files is fine also
    #
    print $fws->safeDir( "c:/this/is/fine/also.zip" );

safeFile

All files should be wrapped in this method before being applied. It will remove any context that could change its scope to a different directory.

    #
    # will return ....i-am-trying-to-change-dir.ext
    #
    print $fws->safeFile( "../../i-am-trying-to-change-dir.ext" );

safeNumber

Make sure a number is a valid number and strip anything that would make it not. The first character in the string has to be a '-' for the number to maintain its negative status.

    #
    # will return -34663.43
    #
    print $fws->safeNumber( '- $34,663.43' );

safeSQL

All fields and dynamic content in SQL statements should be wrapped in this method before being applied. It will add double tics and escape any escapes so you can not break out of a statement and inject anything not intended.

    #
    # will return this '' or 1=1 or '' is super bad
    #
    print $fws->safeSQL("this ' or 1=1 or ' is super bad");

safeQuery

Remove anything from a query string that could advocate a cross site scripting attack

    #
    # Do something that could be used for evil
    #
    my $querySting = 'id=<script>alert( 'bo!' )</script>url&this=that';
    $valueHash{html} .= '<a href="http://www.frameworksites.com/cgi-bin/go.pl?' . $fws->safeQuery( $queryString ) . '">Click Me</a>';

safeURL

Switch a string into a safe url by replacing all non 0-9 a-z A-Z with a dash but not start with a dash. For SEO reasons this will also switch any & with the word "and".

    #
    # change the product name into a safe url
    #
    my $productName = 'My super cool product & title';
    my $frindlyURL = $fws->safeURL( $productName ) . '.html';

    #
    # change an name into a safe class name
    #
    my $productAttribute = 'Size: Large';
    my $className = 'productAttribute_' . $fws->safeURL( $productAttribute );

safeJSON

Replace any thing harmful to an JSON node that could cause it to fail. It will escape stuff like quotes and such.

    #
    # make a node safe
    #
    my $sillyNode = 'This "Can not" be in json';
    my $safeSillyNode = $fws->safeJSON( $sillyNode );
    print 'Safe JSON: '.$sillyNode;

safeXML

Replace any thing harmful to an XML node that could cause it to fail validation. & and < will be converted to &amp; and &lt;

    #
    # make a node safe
    #
    my $sillyNode = '55 is < 66 & 77';
    my $safeSillyNode = $fws->safeXML( $sillyNode );
    print '<silly>' . $safeSillyNode . '</silly>';
    
    #
    # all in one
    #
    print '<silly>' . $fws->safeXML( '55 is < 66 & 77' ) . '</silly>';

AUTHOR ^

Nate Lewis, <nlewis at gnetworks.com>

BUGS ^

Please report any bugs or feature requests to bug-fws-v2 at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=FWS-V2. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT ^

You can find documentation for this module with the perldoc command.

    perldoc FWS::V2::Safety

You can also look for information at:

LICENSE AND COPYRIGHT ^

Copyright 2013 Nate Lewis.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

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