GnuTLS/NSS interop in Exim 4.80 RC

Phil Pennock help-gnutls-phil at
Mon May 21 01:17:04 CEST 2012

On 2012-05-20 at 16:24 +0200, Nikos Mavrogiannopoulos wrote:
>  From what I can tell it is the client for some reason terminates the
> connection. What is the output on the client? Do you have a tcpdump of
> the issue? Have you tried alternative priority strings than normal
> [0]?
> [0].

Janne Snabb has done better detective work than I and found that NSS has
a hard-coded clamp on the number of DH bits used for ephemeral D-H and
GnuTLS's return value from gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH,
GNUTLS_SEC_PARAM_NORMAL) is over that limit.

I'll add a clamp option to Exim and default it to the current NSS limit.


More information about the Gnutls-help mailing list