Internet DRAFT - draft-pala-ocspv2
draft-pala-ocspv2
Network Working Group M. Pala
Internet-Draft CableLabs
Intended status: Experimental February 5, 2019
Expires: August 9, 2019
Online Certificate Status Protocol - Version 2 (OCSPv2)
draft-pala-ocspv2-00
Abstract
With the increase number of protocols and applications that rely on
digital certificates to authenticate either the communication channel
(TLS) or the data itself (PKIX), the need for providing an efficient
revocation system is paramount. Although the Online Certificate
Status Protocol (OCSP) allows for efficient lookup of the revocation
status of a certificate, the distribution of this information via
HTTP (or very rarely) HTTPS is not particularly efficient for high
volume websites without incurring in high distribution costs (e.g.,
CDN).
In particular, this specification defines a new set of messages
(i.e., OCSPv2 Request and OCSPv2 Response) that address the
inefficiencies of OCSPv1 by (a) providing range-based responses to
optimize (reduce) the number of pre-computed responses required by a
CA, and (b) allowing the inclusion of other (certificate chain)
responses in the same response for round-trip and caching
optimization.
The deployment of OCSPv2 to validate the status of a certificate is
meant to lower the costs of providing revocation services and
increase the efficiency of the service, thus allowing for short-lived
responses (i.e., hours instead of days).
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
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material or to cite them other than as "work in progress."
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Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
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described in the Simplified BSD License.
Table of Contents
1. Requirements notation . . . . . . . . . . . . . . . . . . . . 2
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Limitations of previous versions of OCSPv1 . . . . . . . . . 2
4. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 3
5. The OCSPv2 Request . . . . . . . . . . . . . . . . . . . . . 3
6. The OCSPv2 Response . . . . . . . . . . . . . . . . . . . . . 3
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
8. Security Considerations . . . . . . . . . . . . . . . . . . . 3
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 3
10. Normative References . . . . . . . . . . . . . . . . . . . . 3
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4
1. Requirements notation
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
2. Introduction
Introduction
3. Limitations of previous versions of OCSPv1
Explains the limitations of OCSPv1 when it comes to efficiency.
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4. Protocol Overview
Provides a description of the protocol with particular emphasis on
the different approach (range vs. one-by-one).
5. The OCSPv2 Request
The OCSPv2 Request.
6. The OCSPv2 Response
The OCSPv2 Response.
7. IANA Considerations
No special considerations for IANA.
8. Security Considerations
Several security considerations need to be explicitly considered for
the system administrators and application developers to understand
the weaknesses of the overall architecture.
9. Acknowledgments
The authors would like to thank everybody who provided insightful
comments and helped in the definition of the deployment
considerations. Last but not least, the authors would like to thank
all the people that expressed interest in implementing support for
this proposal.
10. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66,
RFC 3986, DOI 10.17487/RFC3986, January 2005,
<https://www.rfc-editor.org/info/rfc3986>.
[RFC4501] Josefsson, S., "Domain Name System Uniform Resource
Identifiers", RFC 4501, DOI 10.17487/RFC4501, May 2006,
<https://www.rfc-editor.org/info/rfc4501>.
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[RFC5019] Deacon, A. and R. Hurst, "The Lightweight Online
Certificate Status Protocol (OCSP) Profile for High-Volume
Environments", RFC 5019, DOI 10.17487/RFC5019, September
2007, <https://www.rfc-editor.org/info/rfc5019>.
[RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", STD 68, RFC 5234,
DOI 10.17487/RFC5234, January 2008,
<https://www.rfc-editor.org/info/rfc5234>.
[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
Housley, R., and W. Polk, "Internet X.509 Public Key
Infrastructure Certificate and Certificate Revocation List
(CRL) Profile", RFC 5280, DOI 10.17487/RFC5280, May 2008,
<https://www.rfc-editor.org/info/rfc5280>.
[RFC6960] Santesson, S., Myers, M., Ankney, R., Malpani, A.,
Galperin, S., and C. Adams, "X.509 Internet Public Key
Infrastructure Online Certificate Status Protocol - OCSP",
RFC 6960, DOI 10.17487/RFC6960, June 2013,
<https://www.rfc-editor.org/info/rfc6960>.
Author's Address
Massimiliano Pala
CableLabs
858 Coal Creek Cir
Louisville, CO 80027
USA
Email: director@openca.org
URI: http://www.linkedin.com/in/mpala
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