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Re: Should openssl accept weak DSA/DH keys with g = +/- 1 ?

From: Hanno Böck <hanno () hboeck de>
Date: Tue, 15 Apr 2014 21:20:11 +0200

On Tue, 15 Apr 2014 17:06:13 +0300
Georgi Guninski <guninski () guninski com> wrote:

openssl accepts DSA (and probably DH) keys with
g=1 (or g= -1). Both are extremely weak, in
practice plaintext.


openssl also accepts 15 as a prime for DH. I recently looked at this:
http://blog.hboeck.de/archives/841-Diffie-Hellman-and-TLS-with-nonsense-parameters.html

-- 
Hanno Böck
http://hboeck.de/

mail/jabber: hanno () hboeck de
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Current thread:

Should openssl accept weak DSA/DH keys with g = +/- 1 ? Georgi Guninski (Apr 15)
- Re: Should openssl accept weak DSA/DH keys with g = +/- 1 ? Hanno Böck (Apr 15)
  - Re: Should openssl accept weak DSA/DH keys with g = +/- 1 ? Georgi Guninski (Apr 16)
    - Re: Should openssl accept weak DSA/DH keys with g = +/- 1 ? Hanno Böck (Apr 16)
    - Re: Should openssl accept weak DSA/DH keys with g = +/- 1 ? Pavel Kankovsky (Apr 17)
    - Re: Should openssl accept weak DSA/DH keys with g = +/- 1 ? Jeffrey Walton (Apr 17)