Digest::SHA::PurePerl is a complete implementation of the NIST
Secure Hash Standard. It gives Perl programmers a convenient way
to calculate SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512 message
digests. The module can handle all types of input, including
Digest::SHA::PurePerl is written entirely in Perl. If your platform
has a C compiler, you should install the functionally-equivalent
(but much faster) Digest::SHA module.
Submitted by: Gabor Kovesdan