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NAME
Digest::BubbleBabble - Create bubble-babble fingerprints
SYNOPSIS
# Create a fingerprint of a simple string.
use Digest::BubbleBabble qw( bubblebabble );
my $fingerprint = bubblebabble( Digest => "Pineapple" );
# Create a fingerprint of a SHA-1 hash.
use Digest::SHA1 qw( sha1 );
$fingerprint = bubblebabble( Digest => sha1("hello") );
DESCRIPTION
*Digest::BubbleBabble* takes a message digest (often generated by either
of the MD5 or SHA-1 message digest algorithms) and creates a fingerprint
of that digest in "bubble babble" format. Bubble babble is a method of
representing a message digest as a string of "real" words, to make the
fingerprint easier to remember. The "words" are not necessarily real
words, but they look more like words than a string of hex characters.
Bubble babble fingerprinting is used by the SSH2 suite (and,
consequently, by *Net::SSH::Perl*, the Perl SSH implementation) to
display easy-to-remember key fingerprints. The key (a DSA or RSA key) is
converted into a textual form, digested using *Digest::SHA1*, and run
through *bubblebabble* to create the key fingerprint.
USAGE
*Digest::BubbleBabble* conditionally exports one function called
*bubblebabble*; to import the function you must choose to import it,
like this:
use Digest::BubbleBabble qw( bubblebabble );
bubblebabble( Digest => $digest )
Currently takes only one pair of arguments, the key of which must be
*Digest*, the value of which is the actual message digest *$digest*. You
should generate this message digest yourself using either *Digest::MD5*
of *Digest::SHA1*.
Returns the bubble babble form of the digest.
SEE ALSO
The BubbleBabble specification is available at:
http://web.mit.edu/kenta/www/one/bubblebabble/spec/jrtrjwzi/draft-huima-
01.txt
LICENSE
Digest::BubbleBabble is free software; you may redistribute it and/or
modify it under the same terms as Perl itself.
AUTHOR & COPYRIGHTS
Benjamin Trott, cpan@stupidfool.org
Except where otherwise noted, Digest::BubbleBabble is Copyright 2001
Benjamin Trott. All rights reserved.
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