Thanks.
We already pre-generate the DH parameters for sendmail and have them
sitting around in a dhparms.pem file unique to the server. I wonder if
anyone has created a patch that allows UW IMAP to read such a file and
supply the parameters?
-Erik Kangas
On April 5, 2017 06:07:15 pm EDT, "Dan Lukes" <[email protected]> wrote:
Erik Kangas, Ph.D. wrote:
Has anyone found a way to get the Diffie Hellman TLS v1.2 ciphers (e.g.
DHE-RSA-AES256-GCM-SHA384) to work with UW IMAP / Panda IMAP?
In order to perform a DH key exchange the server must use a DH group (DH
parameters) and generate a DH key.
UW IMAP neither generate DH parameters on the fly nor supply the
parameters - thus no DHE can be negotiated.
You may patch the code and use SSL_CTX_set_options(3) to set
SSL_OP_SINGLE_DH_USE option, but generating DH parameters on the fly is
extremely time consuming.
Dan
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