perl-Digest-SHA1 -- Digest-SHA1 Perl module
http://search.cpan.org/dist/Digest-SHA1/
The Digest::SHA1 module allows you to use the NIST SHA-1 message digest
algorithm from within Perl programs. The algorithm takes as input a
message of arbitrary length and produces as output a 160-bit "fingerprint"
or "message digest" of the input.
The Digest::SHA1 module provide a procedural interface for simple use,
as well as an object oriented interface that can handle messages of
arbitrary length and which can read files directly.
A binary digest will be 20 bytes long. A hex digest will be 40 characters
long. A base64 digest will be 27 characters long.