draft-ietf-lamps-crmf-update-algs-01.txt   draft-ietf-lamps-crmf-update-algs-02.txt 
Network Working Group R. Housley Network Working Group R. Housley
Internet-Draft Vigil Security Internet-Draft Vigil Security
Updates: 4211 (if approved) 18 December 2020 Updates: 4211 (if approved) 21 December 2020
Intended status: Standards Track Intended status: Standards Track
Expires: 21 June 2021 Expires: 24 June 2021
Algorithm Requirements Update to the Internet X.509 Public Key Algorithm Requirements Update to the Internet X.509 Public Key
Infrastructure Certificate Request Message Format (CRMF) Infrastructure Certificate Request Message Format (CRMF)
draft-ietf-lamps-crmf-update-algs-01 draft-ietf-lamps-crmf-update-algs-02
Abstract Abstract
This document updates the cryptographic algorithm requirements for This document updates the cryptographic algorithm requirements for
the Password-Based Message Authentication Code in the Internet X.509 the Password-Based Message Authentication Code in the Internet X.509
Public Key Infrastructure Certificate Request Message Format (CRMF) Public Key Infrastructure Certificate Request Message Format (CRMF)
specified in RFC 4211. specified in RFC 4211.
Status of This Memo Status of This Memo
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on 21 June 2021. This Internet-Draft will expire on 24 June 2021.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 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 (https://trustee.ietf.org/ Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document. license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights Please review these documents carefully, as they describe your rights
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this may not be true with all hash functions in the future. this may not be true with all hash functions in the future.
NEW: NEW:
iterationCount identifies the number of times the hash is applied iterationCount identifies the number of times the hash is applied
during the key computation process. The iterationCount MUST be a during the key computation process. The iterationCount MUST be a
minimum of 100; however, the iterationCount SHOULD be as large as minimum of 100; however, the iterationCount SHOULD be as large as
server performance will allow, typically at least 10,000 server performance will allow, typically at least 10,000
[NISTSP800-63B]. There is a trade off between protection of the [NISTSP800-63B]. There is a trade off between protection of the
password from attacks and the time spent by the server processing password from attacks and the time spent by the server processing
the iterations. the iterations. A lower iteration count can be used, if automated
generation produces shared secrets with high entropy.
3.4. MAC Algorithm 3.4. MAC Algorithm
Change the paragraph describing the "mac" as follows: Change the paragraph describing the "mac" as follows:
OLD: OLD:
mac identifies the algorithm and associated parameters of the MAC mac identifies the algorithm and associated parameters of the MAC
function to be used. All implementations MUST support HMAC-SHA1 function to be used. All implementations MUST support HMAC-SHA1
[HMAC]. All implementations SHOULD support DES-MAC and Triple- [HMAC]. All implementations SHOULD support DES-MAC and Triple-
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When this The algorithm identifier is used, the parameters SHOULD be When this The algorithm identifier is used, the parameters SHOULD be
present. When present, the parameters MUST contain a type of NULL. present. When present, the parameters MUST contain a type of NULL.
The algorithm identifier for AES-GMAC [AES][GMAC] with a 128-bit key The algorithm identifier for AES-GMAC [AES][GMAC] with a 128-bit key
is defined in [I-D.housley-lamps-cms-aes-mac-alg]: is defined in [I-D.housley-lamps-cms-aes-mac-alg]:
id-aes128-GMAC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) id-aes128-GMAC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3) country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 9 } nistAlgorithm(4) aes(1) 9 }
When this The algorithm identifier is used, the parameters MUST be When this algorithm identifier is used, the parameters MUST be
present, and the parameters MUST contain the GMACParameters structure present, and the parameters MUST contain the GMACParameters structure
as follows: as follows:
GMACParameters ::= SEQUENCE { GMACParameters ::= SEQUENCE {
nonce OCTET STRING, -- recommended size is 12 octets nonce OCTET STRING, -- recommended size is 12 octets
length MACLength DEFAULT 12 } length MACLength DEFAULT 12 }
MACLength ::= INTEGER (12 | 13 | 14 | 15 | 16) MACLength ::= INTEGER (12 | 13 | 14 | 15 | 16)
The GMACParameters nonce parameter is the GMAC initialization vector. The GMACParameters nonce parameter is the GMAC initialization vector.
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