On Mon, Jan 22, 2018 at 1:44 AM, Gladewitz, Robert via openssl-users <openssl-users@xxxxxxxxxxx> wrote: > > Thank you all for all the answers. > The problem is that Cisco prescribes the attributes. > ... > > Unfortunately, the Cisco CUCM telephone systems do not seem to accept certificates without these attributes :-(. > > If I understand everything correctly, would the only (and unclean) workaround be adding "TLS Web Client Authentication" to solve my problem? > I think you have a couple of choices. First, you can downgrade to a version of OpenSSL that follows the RFC. Second, you can patch OpenSSL to follow the RFC. Third, you can implement the verify_callback and override the errant behavior. Jeff -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users