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Versions: (draft-huston-sidr-rpki-algs) 00 01
02 03 04 05 RFC 6485
SIDR G. Huston
Internet-Draft APNIC
Intended status: Informational August 25, 2009
Expires: February 26, 2010
A Profile for Algorithms and Key Sizes for use in the Resource Public
Key Infrastructure
draft-ietf-sidr-rpki-algs-00.txt
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft will expire on February 26, 2010.
Copyright Notice
Copyright (c) 2009 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 in effect on the date of
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Abstract
This document defines a profile for the algorithm and key size to be
used for signatures applied to certificates, Certificate Revocation
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Internet-Draft RPKI Algorithm Profile August 2009
Lists, and signed objects in the context of the Resource Public Key
Infrastructure.
1. Introduction
This document defines a profile for the algorithm and key size to be
used for signatures applied to certificates, Certificate Revocation
Lists (CRLs), and signed objects in the context of the Resource
Public Key Infrastructure (RPKI) [I-D.ietf-sidr-arch].
This section of the profile is specified in a distinct profile
document, referenced by the RPKI Certificate Policy (CP)
[I-D.ietf-sidr-cp] and the RPKI Certificate Profile
[I-D.ietf-sidr-res-certs], in order to allow for a degree of
algorithm and key agility in the RPKI, while permitting some longer
term stability in the CP and Certificate Profile specifications.
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 RFC 2119.
2. Algorithm and Key Size
This profile specifies the use of the RSA algorithm [RFC3447] to
compute the signature of certificates, CRLs and signed objects in the
context of the RPKI. This profile specifies a default of SHA-256
with RSA (sha256WithRSAEncryption), and allows for the use of SHA-384
(sha384WithRSAEncryption) or SHA-512 (sha384WithRSAEncryption).
Accordingly, The OID values used in the RPKI for such signatures MUST
be one of { pkcs-1 11 }, { pkcs-1 12 } or { pkcs-1 13 } [RFC4055].
The required RSA key size MUST be 2048 bits.
The public exponent (e) of the RSA algorithm is F4 (65,537).
3. Future Upates
It is anticipated that the RPKI will require the adoption of updated
key sizes and a different set of signature and hash algorithms over
time, in order to maintain an acceptable level of cryptographic
security to protect the integrity of signed products in the RPKI.
This profile should be updated to specify such future requirements,
as and when appropriate.
Certification Authorities (CAs) and Relying Parties (RPs) should be
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capable of supporting a transition to allow for the phased
introduction of additional encryption algorithms and key
specifications, and also accomodate the orderly deprecation of
previously specified algorithms and keys. Accordingly, CAs and RPs
SHOULD be capable of supporting multiple RPKI algorithm and key
profiles simultaneously within the scope of such anticipated
transitions.
4. Security Considerations
The Security Considerations of [RFC3779], [RFC5280], and [RFC4055]
apply to signatures as defined by this profile, and their use.
5. IANA Considerations
[There are no IANA considerations in this document.]
6. Acknowledgments
The author acknowledges the re-use in this draft of material
originally contained in working drafts the RPKI Certificate Policy
and Resource Certificate profile documents. The co-authors of these
two documents, namely Stephen Kent, Derrick Kong, Karen Seo, Ronald
Watro, George Michaelson and Robert Loomans, are acknowledged with
thanks. The constraint on key size noted in this profile is the
outcome of comments from Stephen Kent and review comments from David
Cooper.
7. Normative References
[I-D.ietf-sidr-arch]
Lepinski, M. and S. Kent, "An Infrastructure to Support
Secure Internet Routing", draft-ietf-sidr-arch (work in
progress), July 2009.
[I-D.ietf-sidr-cp]
Seo, K., Watro, R., Kong, D., and S. Kent, "Certificate
Policy (CP) for the Resource PKI (RPKI)",
draft-ietf-sidr-cp (work in progress), July 2009.
[I-D.ietf-sidr-res-certs]
Husotn, G., Michaelson, G., and R. Loomans, "A Profile for
X.509 PKIX Resource Certificates",
draft-ietf-sidr-res-certs (work in progress),
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Internet-Draft RPKI Algorithm Profile August 2009
February 2008.
[RFC3447] Jonsson, J. and B. Kaliski, "Public-Key Cryptography
Standards (PKCS) #1: RSA Cryptography Specifications
Version 2.1", RFC 3447, February 2003.
[RFC3779] Lynn, C., Kent, S., and K. Seo, "X.509 Extensions for IP
Addresses and AS Identifiers", RFC 3779, June 2004.
[RFC4055] Schaad, J., Kaliski, B., and R. Housley, "Additional
Algorithms and Identifiers for RSA Cryptography for use in
the Internet X.509 Public Key Infrastructure Certificate
and Certificate Revocation List (CRL) Profile", RFC 4055,
June 2005.
[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, May 2008.
Author's Address
Geoff Huston
Asia Pacific Network Information Centre
Email: gih@apnic.net
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