Diff: rfc8842v3.txt - rfc8842.txt

	rfc8842v3.txt	rfc8842.txt

	Internet Engineering Task Force (IETF) C. Holmberg	Internet Engineering Task Force (IETF) C. Holmberg
	Request for Comments: 8842 Ericsson	Request for Comments: 8842 Ericsson
	Updates: 5763, 7345 R. Shpount	Updates: 5763, 7345 R. Shpount
	Category: Standards Track TurboBridge	Category: Standards Track TurboBridge

	ISSN: 2070-1721 May 2020	ISSN: 2070-1721 January 2021

	Session Description Protocol (SDP) Offer/Answer Considerations for	Session Description Protocol (SDP) Offer/Answer Considerations for
	Datagram Transport Layer Security (DTLS) and Transport Layer Security	Datagram Transport Layer Security (DTLS) and Transport Layer Security
	(TLS)	(TLS)

	Abstract	Abstract

	This document defines the Session Description Protocol (SDP) offer/	This document defines the Session Description Protocol (SDP) offer/
	answer procedures for negotiating and establishing a Datagram	answer procedures for negotiating and establishing a Datagram
	Transport Layer Security (DTLS) association. The document also	Transport Layer Security (DTLS) association. The document also

	skipping to change at line 44 ¶	skipping to change at line 44 ¶
	received public review and has been approved for publication by the	received public review and has been approved for publication by the
	Internet Engineering Steering Group (IESG). Further information on	Internet Engineering Steering Group (IESG). Further information on
	Internet Standards is available in Section 2 of RFC 7841.	Internet Standards is available in Section 2 of RFC 7841.

	Information about the current status of this document, any errata,	Information about the current status of this document, any errata,
	and how to provide feedback on it may be obtained at	and how to provide feedback on it may be obtained at
	https://www.rfc-editor.org/info/rfc8842.	https://www.rfc-editor.org/info/rfc8842.

	Copyright Notice	Copyright Notice


	Copyright (c) 2020 IETF Trust and the persons identified as the	Copyright (c) 2021 IETF Trust and the persons identified as the
	document authors. All rights reserved.	document authors. All rights reserved.

	This document is subject to BCP 78 and the IETF Trust's Legal	This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents	Provisions Relating to IETF Documents
	(https://trustee.ietf.org/license-info) in effect on the date of	(https://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents	publication of this document. Please review these documents
	carefully, as they describe your rights and restrictions with respect	carefully, as they describe your rights and restrictions with respect
	to this document. Code Components extracted from this document must	to this document. Code Components extracted from this document must
	include Simplified BSD License text as described in Section 4.e of	include Simplified BSD License text as described in Section 4.e of
	the Trust Legal Provisions and are provided without warranty as	the Trust Legal Provisions and are provided without warranty as

	skipping to change at line 221 ¶	skipping to change at line 221 ¶
	Name: tls-id	Name: tls-id

	Value: tls-id-value	Value: tls-id-value

	Usage Level: media	Usage Level: media

	Charset Dependent: no	Charset Dependent: no

	Default Value: N/A	Default Value: N/A


	Syntax: tls-id-value = 20*255(tls-id-char)	Syntax:
		tls-id-value = 20*255(tls-id-char)
	tls-id-char = ALPHA / DIGIT / "+" / "/" / "-" / "_"	tls-id-char = ALPHA / DIGIT / "+" / "/" / "-" / "_"

	<ALPHA and DIGIT defined in RFC 4566>	<ALPHA and DIGIT defined in RFC 4566>


	Example: a=tls-id:abc3de65cddef001be82	Example:
		a=tls-id:abc3de65cddef001be82

	Every time an endpoint requests to establish a new DTLS association,	Every time an endpoint requests to establish a new DTLS association,
	the endpoint MUST generate a new local "tls-id" attribute value. An	the endpoint MUST generate a new local "tls-id" attribute value. An
	unchanged local "tls-id" attribute value, in combination with non-	unchanged local "tls-id" attribute value, in combination with non-
	changed fingerprints, indicates that the endpoint intends to reuse	changed fingerprints, indicates that the endpoint intends to reuse
	the existing DTLS association.	the existing DTLS association.

	The "tls-id" attribute value MUST be generated using a strong random	The "tls-id" attribute value MUST be generated using a strong random
	function and include at least 120 bits of randomness.	function and include at least 120 bits of randomness.


	skipping to change at line 872 ¶	skipping to change at line 874 ¶

	[RFC8445] Keranen, A., Holmberg, C., and J. Rosenberg, "Interactive	[RFC8445] Keranen, A., Holmberg, C., and J. Rosenberg, "Interactive
	Connectivity Establishment (ICE): A Protocol for Network	Connectivity Establishment (ICE): A Protocol for Network
	Address Translator (NAT) Traversal", RFC 8445,	Address Translator (NAT) Traversal", RFC 8445,
	DOI 10.17487/RFC8445, July 2018,	DOI 10.17487/RFC8445, July 2018,
	<https://www.rfc-editor.org/info/rfc8445>.	<https://www.rfc-editor.org/info/rfc8445>.

	[RFC8843] Holmberg, C., Alvestrand, H., and C. Jennings,	[RFC8843] Holmberg, C., Alvestrand, H., and C. Jennings,
	"Negotiating Media Multiplexing Using the Session	"Negotiating Media Multiplexing Using the Session
	Description Protocol (SDP)", RFC 8843,	Description Protocol (SDP)", RFC 8843,

	DOI 10.17487/RFC8843, 2020,	DOI 10.17487/RFC8843, January 2021,
	<https://www.rfc-editor.org/info/rfc8843>.	<https://www.rfc-editor.org/info/rfc8843>.


	[RFC8859] Nandakumar, S., "A Framework for SDP Attributes when	[RFC8859] Nandakumar, S., "A Framework for Session Description
	Multiplexing", RFC 8859, DOI 10.17487/RFC8859, February	Protocol (SDP) Attributes When Multiplexing", RFC 8859,
	2018, <https://www.rfc-editor.org/info/rfc8859>.	DOI 10.17487/RFC8859, January 2021,
		<https://www.rfc-editor.org/info/rfc8859>.

	12.2. Informative References	12.2. Informative References

	[ITU.T38] ITU-T, "Procedures for real-time Group 3 facsimile	[ITU.T38] ITU-T, "Procedures for real-time Group 3 facsimile
	communication over IP networks", Recommendation T.38,	communication over IP networks", Recommendation T.38,
	September 2010, <https://www.itu.int/rec/T-REC-T.38/en>.	September 2010, <https://www.itu.int/rec/T-REC-T.38/en>.

	[RFC4474] Peterson, J. and C. Jennings, "Enhancements for	[RFC4474] Peterson, J. and C. Jennings, "Enhancements for
	Authenticated Identity Management in the Session	Authenticated Identity Management in the Session
	Initiation Protocol (SIP)", RFC 4474,	Initiation Protocol (SIP)", RFC 4474,

	skipping to change at line 922 ¶	skipping to change at line 925 ¶
	<https://www.rfc-editor.org/info/rfc7983>.	<https://www.rfc-editor.org/info/rfc7983>.

	[RFC8224] Peterson, J., Jennings, C., Rescorla, E., and C. Wendt,	[RFC8224] Peterson, J., Jennings, C., Rescorla, E., and C. Wendt,
	"Authenticated Identity Management in the Session	"Authenticated Identity Management in the Session
	Initiation Protocol (SIP)", RFC 8224,	Initiation Protocol (SIP)", RFC 8224,
	DOI 10.17487/RFC8224, February 2018,	DOI 10.17487/RFC8224, February 2018,
	<https://www.rfc-editor.org/info/rfc8224>.	<https://www.rfc-editor.org/info/rfc8224>.

	[RFC8839] Petit-Huguenin, M., Nandakumar, S., Holmberg, C., Keränen,	[RFC8839] Petit-Huguenin, M., Nandakumar, S., Holmberg, C., Keränen,
	A., and R. Shpount, "Session Description Protocol (SDP)	A., and R. Shpount, "Session Description Protocol (SDP)

	Offer/Answer procedures for Interactive Connectivity	Offer/Answer Procedures for Interactive Connectivity
	Establishment (ICE)", RFC 8839, DOI 10.17487/RFC8839,	Establishment (ICE)", RFC 8839, DOI 10.17487/RFC8839,

	2020, <https://www.rfc-editor.org/info/rfc8839>.	January 2021, <https://www.rfc-editor.org/info/rfc8839>.


	[RFC8844] Thomson, M. and E. Rescorla, "Unknown Key Share Attacks on	[RFC8844] Thomson, M. and E. Rescorla, "Unknown Key-Share Attacks on
	uses of TLS with the Session Description Protocol (SDP)",	Uses of TLS with the Session Description Protocol (SDP)",
	RFC 8844, DOI 10.17487/RFC8844, 2020,	RFC 8844, DOI 10.17487/RFC8844, January 2021,
	<https://www.rfc-editor.org/info/rfc8844>.	<https://www.rfc-editor.org/info/rfc8844>.

	Acknowledgements	Acknowledgements

	Thanks to Justin Uberti, Martin Thomson, Paul Kyzivat, Jens Guballa,	Thanks to Justin Uberti, Martin Thomson, Paul Kyzivat, Jens Guballa,
	Charles Eckel, Gonzalo Salgueiro, and Paul Jones for providing	Charles Eckel, Gonzalo Salgueiro, and Paul Jones for providing
	comments and suggestions on the document. Ben Campbell performed an	comments and suggestions on the document. Ben Campbell performed an
	Area Director review. Paul Kyzivat performed a Gen-ART review.	Area Director review. Paul Kyzivat performed a Gen-ART review.

	Authors' Addresses	Authors' Addresses

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