gtls Network Stream Driver

This network stream driver implements a TLS protected transport via the GnuTLS library.

Supported Driver Modes

0 - unencrypted trasmission (just like ptcp driver)
1 - TLS-protected operation

Note: mode 0 does not provide any benefit over the ptcp driver. This mode exists for technical reasons, but should not be used. It may be removed in the future.
Supported Authentication Modes

anon - anonymous authentication as described in IETF's draft-ietf-syslog-transport-tls-12 Internet draft
x509/fingerprint - certificate fingerprint authentication as described in IETF's draft-ietf-syslog-transport-tls-12 Internet draft
x509/name - certificate validation and subject name authentication as described in IETF's draft-ietf-syslog-transport-tls-12 Internet draft [NOT YET IMPLEMENTED]

Note: "anon" does not permit to authenticate the remote peer. As such, this mode is vulnerable to man in the middle attacks as well as unauthorized access. It is recommended NOT to use this mode.

Known Problems

Even in x509/fingerprint mode, both the client and sever certificate currently must be signed by the same root CA. This is an artifact of the underlying GnuTLS library and the way we use it. It is expected that we can resolve this issue in the future.

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