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Re: [GNU Crypto] Problems using Asyncron encryption...


From: Casey Marshall
Subject: Re: [GNU Crypto] Problems using Asyncron encryption...
Date: Mon, 29 Mar 2004 21:08:41 -0800
User-agent: Gnus/5.1002 (Gnus v5.10.2) Emacs/21.2 (gnu/linux)

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>>>>> ":" ==   <address@hidden> writes:

:> Hi :) I am trying too use Diffie-Hellman key agreement
:> protocols. How ever, I cant seem to get it to work when using 2
:> different applications. It is like some parameter is missing...  I
:> am wondering if there is a bug or some parameter I am nor getting
:> right... I hope somebody here might know what's wrong...

Do you get an error that says "p is far too small"?

There is a bug in gnu.crypto.key.dh.GnuDHKeyPairGenerator where it
uses a prime size that is too small (512, when the key agreement
expects a prime 1024 bits or larger). I changed the key agreement code
(I think for 2.0.1) to explicitly reject small primes, but didn't
check the default parameters of the key generator class.

Pass a larger number as the `PRIME_SIZE' parameter of the key pair
generator (1024 is fine), instead of using the default parameters.

This is a bug and will be fixed for 2.0.2, probably to be released
soon, since I have a few other things in the queue that could go in.

Cheers and HTH.

- -- 
Casey Marshall || address@hidden
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