See MIME::Base64 and perhaps pack.

Update: Although I do not receive the same result - are you sure about the input and output?

use strict;
use warnings;
use MIME::Base64 'encode_base64';

use Test::More tests => 1;

is (encode_base64((pack 'q', -281581062704388899), ''), '/Befg+4HJN0')
+;

[download]

gives '3SQH7oOfF/w=' instead.

In reply to Re^3: Signed Long Hash by hippo
in thread Signed Long Hash by breezykatt

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