Importing old PGP key

[vedaal at hush.com]

>Message: 6
>Date: Wed, 13 Aug 2008 11:54:18 +0200 (CEST)
>From: "Kiss Gabor (Bitman)" <kissg at ssg.ki.iif.hu>
>Subject: Importing old PGP key

>I have the same problem as was answered by David Shaw in 2004:
>http://osdir.com/ml/gnu.gnupg.users/2004-06/msg00022.html
>(Converting a veeeery old PGP key (2.6.3ia) to GnuPG.)
>
>However the method he suggested does not work for me:
>
>
>$ gpg --s2k-cipher-algo cast5 --edit-key 0x5D144299
>gpg (GnuPG) 1.4.6; Copyright (C) 2006 Free Software Foundation, 
>Inc.
>This program comes with ABSOLUTELY NO WARRANTY.
>This is free software, and you are welcome to redistribute it
>under certain conditions. See the file COPYING for details.
>
>Secret key is available.
>
>pub   512R/5D144299  created: 1999-04-12  expires: never       
>usage:
>SCEA
>                     trust: unknown       validity: unknown
>[ unknown] (1). hun.admin.news
>
>Command> passwd
>Key is protected.
>gpg: protection algorithm 1 (IDEA) is not supported
>gpg: the IDEA cipher plugin is not present
>gpg: please see http://www.gnupg.org/faq/why-not-idea.html for 
>more information
>Can't edit this key: unknown cipher algorithm
>
>Command> 
>
>
>What should I do?


get the IDEA algorithm
ftp://ftp.gnupg.dk/pub/contrib-dk/ideadll.zip

unzip it, and save it to any folder
(for illustration, let's say it was saved as 'c:\gnupg\idea.dll')

add this line to your gpg.conf :
load-extension c:\gnupg\idea.dll

then follow David's suggestion

then consider following Robert's suggestion ;-)
(generate a new key,
and decrypt whatever files are encrypted to the old key, 
and re-encrypt them to the new key)

n.b.

if, for some reason, you still need to communicate 
with die-hard pgp 2.x users,
(relax, i'm one of them ;-) )

then i suggest you generate a 2047 key in pgp 2.x
and re-import it to gnupg,
and use the option of --pgp2 whenever you need to communicate with 
a pgp 2.x user)

(some 'really early' versions of pgp 2.x,
had a max of 2047, not 2048 ;-) )
and current versions of gnupg won't let you generate a v3 key,
and even if you have an older version that does,
it's not such a simple procedure to generate a pgp 2.x compatible 
one...)

otherwise,
just use the 'default' for gnupg key generation


vedaal


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