oracular (3) Object::Signature.3pm.gz

Provided by: libobject-signature-perl_1.08-1_all bug

NAME
       Object::Signature - Generate cryptographic signatures for objects


SYNOPSIS
         # In your module
         package My::Module
         use base 'Object::Signature';

         # In outside code
         my $Object = My::Module->new;
         print "Object Signature: " . $Object->signature;


DESCRIPTION
       Object::Signature is an abstract base class that you can inherit from in order to allow your objects to
       generate unique cryptographic signatures.

       The method used to generate the signature is based on Storable and Digest::MD5. The object is fed to
       "Storable::nfreeze" to get a string, which is then passed to Digest::MD5::md5_hex to get a unique 32
       character hexadecimal signature.


METHODS
   signature
       The "signature" method is the only method added to your class, and will generate a unique 32 hexadecimal
       signature for any object it is called on.


SUPPORT
       All bugs should be filed via the bug tracker at

       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Object-Signature>

       For other issues, or commercial enhancement or support, contact the author.


TO DO
   Incremental Generation
       Currently has to generate the entire Storable string before digesting it. Would be nice if there was a
       way to incrementally Storablise and Digest in one pass so that it becomes much more memory efficient for
       large objects.

   Strengthen the Digest Algorithm
       Once the current (as of 2005) hashing controversy settles down, consider selecting a newer and more
       powerful hashing algorithm to replace MD5. Or offer alternatives depending on how important the security
       situation is, as MD5 is very fast (90 meg a second) and many more-secure ones are a lot slower (more than
       10 times slower in some cases).

       On our side is the fact we use Storable. It should be much harder to create collisions when you don't
       control the string, only the structure before it goes through Storable.


AUTHOR
       Adam Kennedy <adamk@cpan.org>


SEE ALSO
       Object::Signature::File, <http://ali.as/>


       Copyright 2004 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.

       The full text of the license can be found in the LICENSE file included with this module.