On Mon, Apr 30, 2012, barcaroller wrote:

> 
> I have an SSL server that requests a client certificate from an SSL
> client.  Both were written using OpenSSL.  This all works fine until
> I ask the server to use Diffie-Hellman parameters; then the client
> will not respond.
> 
> My question is this: what impact do Diffie-Hellman parameters have
> on client certificate requests?
> 
> 
> With Diffie-Hellman parameters  (does not work)
> ==============================
> Client: Client Hello
> 
> Server: Server Hello (Cipher Suite: TLS_DH_anon_WITH_AES_256_CBC_SHA (0x003a))
>        Server Key Exchange
>        Certificate Request
>        Server Hello Done
> 
> Client: <client never responds>
> 

Wrong ciphersuite. Client certificates cannot be requested by anon DH
ciphersuites.

Steve.
--
Dr Stephen N. Henson. OpenSSL project core developer.
Commercial tech support now available see: http://www.openssl.org
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