Hi Tom, Thanks for the review. We will update the draft text addressing your comments and those we received form Cyril. Some notes inline below
On 4 Nov 2015, at 19:55 , t.p. <[email protected]<mailto:[email protected]>> wrote: s.3 At first, I was unsure whether or not both parties sent a StartTLS. "The StartTLS message is a PCEP message sent by a PCC to a PCE and by a PCE to a PCC " suggests both "Once the TCP connection has been successfully established, the first message sent by the PCC to the PCE or by the PCE to the PCC MUST be a StartTLS message " suggests only one. Section 3.3 makes it clearer that both send it. This is fine but I am unaware of any other protocol where this happens so I would suggest /or/and/ in that second sentence and expanding the earlier sentence OLD 2. Initiating the TLS Procedures by the StartTLS message. NEW 2. Initiating the TLS Procedures by the StartTLS message from PCE to PCC and from PCC to PCE. DRL> You are right in the ambiguity and we will correct it as you suggest. I focus on this because I was also looking to see which became TLS Client. TLS is asymmetric, designed to authenticate a (HTTP) server to a client. Netconf (and SNMP), which I know better, struggled with this because the key for Netconf is to authenticate the client to the server, which TLS does not do so well. Posts on the TLS list suggest that there are very few implementations of TLS client authentication, rather something else is done once the secure channel has been established. DRL> I’d not say there are few implementations, but that client authentication is not commonly employed, especially in the web environment where other mechanisms are preferred, like using a TLS connection based on server authentication to retrieve password credentials from the user… As far as I can tell, TLS is only asymmetric in this requirement for authentication of both peers, as the crypto exchanges become essentially equal if client authentication is required. So, do you care who is TLS client and who TLS server? It will be interesting to see a security review of this. DRL> What we had in mind was that the natural approach taking into account the structure of PCEP was to have the PCC peer acting as client and the PCE acting as server. We’ll include a requirement in section 3.2 on this. I do not see any security issue here, but we could certainly request the UTA WG to make a review. I’d say this completely falls under their area of interest. In passing, RFC7465 prohibits RC4 with TLS so I would think it unlikely that "SHOULD support TLS_RSA_WITH_RC4_128_SHA" will be acceptable. DRL> Good catch. It will ve deleted in the coming version. Be goode, -- "Esta vez no fallaremos, Doctor Infierno" Dr Diego R. Lopez Telefonica I+D http://people.tid.es/diego.lopez/ e-mail: [email protected] Tel: +34 913 129 041 Mobile: +34 682 051 091 ---------------------------------- ________________________________ Este mensaje y sus adjuntos se dirigen exclusivamente a su destinatario, puede contener información privilegiada o confidencial y es para uso exclusivo de la persona o entidad de destino. Si no es usted. el destinatario indicado, queda notificado de que la lectura, utilización, divulgación y/o copia sin autorización puede estar prohibida en virtud de la legislación vigente. Si ha recibido este mensaje por error, le rogamos que nos lo comunique inmediatamente por esta misma vía y proceda a su destrucción. The information contained in this transmission is privileged and confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this transmission in error, do not read it. Please immediately reply to the sender that you have received this communication in error and then delete it. Esta mensagem e seus anexos se dirigem exclusivamente ao seu destinatário, pode conter informação privilegiada ou confidencial e é para uso exclusivo da pessoa ou entidade de destino. Se não é vossa senhoria o destinatário indicado, fica notificado de que a leitura, utilização, divulgação e/ou cópia sem autorização pode estar proibida em virtude da legislação vigente. Se recebeu esta mensagem por erro, rogamos-lhe que nos o comunique imediatamente por esta mesma via e proceda a sua destruição
_______________________________________________ Pce mailing list [email protected] https://www.ietf.org/mailman/listinfo/pce
