The Transport Layer Security (TLS) Protocol Version 1.3
draft-ietf-tls-rfc8446bis-00
Network Working Group E. Rescorla
Internet-Draft Mozilla
Obsoletes: 5077, 5246, 6961, 8446 (if approved) 5 October 2020
Updates: 4492, 5705, 6066 (if approved)
Intended status: Standards Track
Expires: 8 April 2021
The Transport Layer Security (TLS) Protocol Version 1.3
draft-ietf-tls-rfc8446bis-00
Abstract
This document specifies version 1.3 of the Transport Layer Security
(TLS) protocol. TLS allows client/server applications to communicate
over the Internet in a way that is designed to prevent eavesdropping,
tampering, and message forgery.
This document updates RFCs 5705 and 6066 and obsoletes RFCs 5077,
5246, and 6961. This document also specifies new requirements for
TLS 1.2 implementations.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on 8 April 2021.
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Please review these documents carefully, as they describe your rights
Rescorla Expires 8 April 2021 [Page 1]
Internet-Draft TLS October 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Conventions and Terminology . . . . . . . . . . . . . . . 6
1.2. Relationship to RFC 8446 . . . . . . . . . . . . . . . . 7
1.3. Major Differences from TLS 1.2 . . . . . . . . . . . . . 7
1.4. Updates Affecting TLS 1.2 . . . . . . . . . . . . . . . . 8
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 9
2.1. Incorrect DHE Share . . . . . . . . . . . . . . . . . . . 12
2.2. Resumption and Pre-Shared Key (PSK) . . . . . . . . . . . 13
2.3. 0-RTT Data . . . . . . . . . . . . . . . . . . . . . . . 15
3. Presentation Language . . . . . . . . . . . . . . . . . . . . 17
3.1. Basic Block Size . . . . . . . . . . . . . . . . . . . . 17
3.2. Miscellaneous . . . . . . . . . . . . . . . . . . . . . . 17
3.3. Numbers . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4. Vectors . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5. Enumerateds . . . . . . . . . . . . . . . . . . . . . . . 19
3.6. Constructed Types . . . . . . . . . . . . . . . . . . . . 20
3.7. Constants . . . . . . . . . . . . . . . . . . . . . . . . 20
3.8. Variants . . . . . . . . . . . . . . . . . . . . . . . . 21
4. Handshake Protocol . . . . . . . . . . . . . . . . . . . . . 22
4.1. Key Exchange Messages . . . . . . . . . . . . . . . . . . 23
4.1.1. Cryptographic Negotiation . . . . . . . . . . . . . . 23
4.1.2. Client Hello . . . . . . . . . . . . . . . . . . . . 24
4.1.3. Server Hello . . . . . . . . . . . . . . . . . . . . 27
4.1.4. Hello Retry Request . . . . . . . . . . . . . . . . . 30
4.2. Extensions . . . . . . . . . . . . . . . . . . . . . . . 31
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