James, thanks for the reply. At this point I am using compiled Windows binaries, and am running a compiled Windows application that uses the SSL DLLs. The Windows application does let me specify a cipher list, but I do not have source to that application to re-build. I don?t think that in this situation I am able to call SSL_CTX_set_options. I guess I might be stuck if I can?t use the cipher list to disable SSL3 while leaving TLS1 enabled. Not the end of the world, but not ideal. Sincerely, David Rueter From: openssl-users [mailto:openssl-users-bounces@xxxxxxxxxxx] On Behalf Of James Sent: Monday, April 06, 2015 6:45 PM To: openssl-users at openssl.org Subject: Re: Disable SSL3 and enable TLS1? / Ambiguous "DES-CBC3-SHA" Hi, Can you try this option SSL_CTX_set_options(m_SslCtx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3); instead of disabling using the cipher list regards, James Arivazhagan On Tue, Apr 7, 2015 at 5:41 AM, David Rueter <drueter at assyst.com <mailto:drueter at assyst.com> > wrote: I would like to disable SSL3 (to prevent POODLE attacks), but I would like to leave TLS1 enabled (particularly DES-CBC3-SHA, AES128-SHA and AES256-SHA). However disabling SSL3 with !SSLv3 disables TLSv1 also. Furthermore, disabling SSL3 with -SSLv3 then adding in individual ciphers such as +DES-CBC3-SHA seems to re-enable SSLv3. In looking at https://www.openssl.org/docs/apps/ciphers.html it looks like SSL_RSA_WITH_3DES_EDE_CBC_SHA and TLS_RSA_WITH_3DES_EDE_CBC_SHA are both referred to as DES-CBC3-SHA. Is this intentional? Are not SSL_RSA_WITH_3DES_EDE_CBC_SHA and TLS_RSA_WITH_3DES_EDE_CBC_SHA different ciphers? Is there no way to disable SSL3 while leaving TLS_RSA_WITH_3DES_EDE_CBC_SHA enabled? _______________________________________________ openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20150406/b853fb50/attachment.html>
