1 Reply Latest reply on Jul 2, 2018 1:30 AM by mchoma

    Wildfly Elytron - DHE parameters config

    enpasos

      It is about the configuration of DHE parameters for TLS handshake.

       

      Before switching to Elytron my configuration of DHE in

      $JAVA_HOME/security/java.security

       

      jdk.tls.server.defaultDHEParameters= { \

            FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1 \

            29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD \

            EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245 \

            E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED \

            EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D \

            C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F \

            83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D \

            670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B \

            E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9 \

            DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510 \

            15728E5A 8AACAA68 FFFFFFFF FFFFFFFF, 2}

      was used by wildfly12 during TLS-Handshake (Server Key Exchange). Everything worked fine.

       

      After switching to Elytron my configuration parameter - the DHE module p - is no more used. Instead an other DHE module with half the size is used.

       

      I need to have some option to configure the DHE parameter. Maybe I'm not seeing an existing option, maybe it is missing.

       

      For my usecase I can not establish the TLS-connection because the TLS client does not accept Server Key Exchange with other DHE-Parameters than the above one.

        • 1. Re: Wildfly Elytron - DHE parameters config
          mchoma

          Are you saying Elytron is ignoring configuration from java.security? That is strange as Elytron delegates to jdk in regards to TLS handshake. Are you still on same java?

           

          However, same as in java.security file can be configured in subsystem with command bellow. Can you try?

          /subsystem=elytron:write-attribute(name=security-properties.a,value=b)