Digest::OMAC::Base - The One-key CBC MAC message authentication code (base class for OMAC hashes)
use base qw(Digest::OMAC::Base);
This module is used internally by Digest::CMAC/Digest::OMAC1 and Digest::OMAC2 (which does different shifting than OMAC1 but is otherwise the same).
To install Digest::CMAC, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.