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[TLS] What does "renegotiation_info" mean?

"Salz, Rich" <rsalz@akamai.com> Wed, 13 June 2018 19:47 UTC

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From: "Salz, Rich" <rsalz@akamai.com>
To: "tls@ietf.org" <tls@ietf.org>
Thread-Topic: What does "renegotiation_info" mean?
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Date: Wed, 13 Jun 2018 19:47:11 +0000
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Subject: [TLS] What does "renegotiation_info" mean?
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It seems that the semantics of the "renegotiation_info" extension are slightly muddy. Qualys understands it to mean that the server will not perform insecure renegotiation, full stop. But OpenSSL further understands it to mean that the server *will* perform secure negotiation. OpenSSL therefore makes it difficult to simultaneously simultaneously satisfy both of Qualys's expectations, since disabling all renegotiation will cause it not to send the "renegotiation_info" extension. Popular open source web servers implement a workaround which achieves Qualys's desired behavior.  Comments?

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