Bug#648546: add OpenPGP ASCII armor checksum to Digest::CRC

[Daniel Kahn Gillmor]

Package: libdigest-crc-perl
Version: 0.17-1
Severity: wishlist
Tags: patch upstream

One common CRC used on the 'net today is the radix-64 armor checksum
specified in the OpenPGP standard:

 https://tools.ietf.org/html/rfc4880#section-6

This is already possible to implement with Digest::CRC using the
following object:

my $ctx = Digest::CRC->new(width => 24, init=> 0xB704CE,
                           xorout => 0x000000, refout => 0,
                           poly => 0x864CFB, refin => 0,
                           cont => 1);

But this is kind of bulky and inconvenient to use.

The attached patch enhances Digest::CRC by adding a crcopenpgparmor
type, and exporting a function of the same name.  It should apply to
version 0.17 of Digest::CRC.

I'd be happy to have this patch included upstream, and release it under
the same terms as the upstream source.

Thanks for Digest::CRC, it's very much appreciated.

Regards,

        --dkg

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