< draft-ietf-pkix-asn1-translation-02.txt		draft-ietf-pkix-asn1-translation-03.txt >
	Network Working Group C. Wallace		Network Working Group C. Wallace
	Internet-Draft Cygnacom Solutions		Internet-Draft Cygnacom Solutions
	Intended status: Informational C. Gardiner		Intended status: Informational C. Gardiner
	Expires: November 11, 2010 BBN Technologies		Expires: February 27, 2011 BBN Technologies
	May 10, 2010		August 26, 2010
	ASN.1 Translation		ASN.1 Translation
	draft-ietf-pkix-asn1-translation-02		draft-ietf-pkix-asn1-translation-03
	Abstract		Abstract
	Abstract Syntax Notation One (ASN.1) is widely used throughout the		Abstract Syntax Notation One (ASN.1) is widely used throughout the
	IETF security area and has been for many years. Some specifications		IETF security area and has been for many years. Some specifications
	were written using a now deprecated version of ASN.1 and some were		were written using a now deprecated version of ASN.1 and some were
	written using the current version of ASN.1. Not all ASN.1 compilers		written using the current version of ASN.1. Not all ASN.1 compilers
	support both older and current syntax. This document is intended to		support both older and current syntax. This document is intended to
	provide guidance to specification authors and to implementers		provide guidance to specification authors and to implementers
	converting ASN.1 modules written using one version of ASN.1 to		converting ASN.1 modules written using one version of ASN.1 to
	another version without causing changes to the "bits on the wire".		another version without causing changes to the "bits on the wire".
	This document does not provide a comprehensive tutorial of any		This document does not provide a comprehensive tutorial of any
	version of ASN.1. Instead, it addresses ASN.1 features that are used		version of ASN.1. Instead, it addresses ASN.1 features that are used
	in IETF security area specifications with focus on items that vary		in IETF security area specifications with focus on items that vary
	with the ASN.1 version.		with the ASN.1 version.
	Status of this Memo		Status of this Memo
	This Internet-Draft is submitted to IETF in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF), its areas, and its working groups. Note that		Task Force (IETF). Note that other groups may also distribute
	other groups may also distribute working documents as Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts.		Drafts is at http://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."
	The list of current Internet-Drafts can be accessed at		This Internet-Draft will expire on February 27, 2011.
	http://www.ietf.org/ietf/1id-abstracts.txt.
	The list of Internet-Draft Shadow Directories can be accessed at
	http://www.ietf.org/shadow.html.
	This Internet-Draft will expire on November 11, 2010.
	Copyright Notice		Copyright Notice
	Copyright (c) 2010 IETF Trust and the persons identified as the		Copyright (c) 2010 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
	(http://trustee.ietf.org/license-info) in effect on the date of		(http://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
	described in the BSD License.		described in the Simplified BSD License.
	Table of Contents		Table of Contents
	1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3		1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
	1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3		1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
	2. ASN.1 design elements . . . . . . . . . . . . . . . . . . . . 4		2. ASN.1 design elements . . . . . . . . . . . . . . . . . . . . 4
	2.1. Open types . . . . . . . . . . . . . . . . . . . . . . . . 4		2.1. Open types . . . . . . . . . . . . . . . . . . . . . . . . 4
	2.1.1. ANY DEFINED BY . . . . . . . . . . . . . . . . . . . . 4		2.1.1. ANY DEFINED BY . . . . . . . . . . . . . . . . . . . . 4
	2.1.2. OCTET STRINGs and BIT STRINGs . . . . . . . . . . . . 5		2.1.2. OCTET STRINGs and BIT STRINGs . . . . . . . . . . . . 5
	2.1.3. Information Object Classes . . . . . . . . . . . . . . 6		2.1.3. Information Object Classes . . . . . . . . . . . . . . 6
	skipping to change at page 3, line 36 ¶		skipping to change at page 4, line 5 ¶
	1.1. Terminology		1.1. Terminology
	This document addresses two different versions of ASN.1. The old		This document addresses two different versions of ASN.1. The old
	(1988) version was defined in a single document (X.208) and the newer		(1988) version was defined in a single document (X.208) and the newer
	(1998, 2002) version is defined in a series of documents (X.680,		(1998, 2002) version is defined in a series of documents (X.680,
	X.681, X.682 and X.683). For convenience, the series of documents is		X.681, X.682 and X.683). For convenience, the series of documents is
	henceforth referred to as X.68x. Specific documents from the series		henceforth referred to as X.68x. Specific documents from the series
	are referenced by name where appropriate.		are referenced by name where appropriate.
	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 [RFC2119].
	2. ASN.1 design elements		2. ASN.1 design elements
	When translating an ASN.1 module from X.208 syntax to X.68x syntax,		When translating an ASN.1 module from X.208 syntax to X.68x syntax,
	or vice versa, many definitions do not require or benefit from		or vice versa, many definitions do not require or benefit from
	change. Review of the original ASN.1 modules updated by		change. Review of the original ASN.1 modules updated by
	[I-D.ietf-pkix-new-asn1] and [I-D.ietf-smime-new-asn1] and the		[I-D.ietf-pkix-new-asn1] and [I-D.ietf-smime-new-asn1] and the
	revised modules included in those documents indicates that most		revised modules included in those documents indicates that most
	changes can be sorted into one of a few categories. This section		changes can be sorted into one of a few categories. This section
	describes these categories.		describes these categories.
	skipping to change at page 22, line 39 ¶		skipping to change at page 22, line 39 ¶
	Consultative Committee, "Abstract Syntax Notation One		Consultative Committee, "Abstract Syntax Notation One
	(ASN.1): Constraint specification", CCITT Recommendation		(ASN.1): Constraint specification", CCITT Recommendation
	X.682, July 2002.		X.682, July 2002.
	[CCITT.X683.2002]		[CCITT.X683.2002]
	International International Telephone and Telegraph		International International Telephone and Telegraph
	Consultative Committee, "Abstract Syntax Notation One		Consultative Committee, "Abstract Syntax Notation One
	(ASN.1): Parameterization of ASN.1 specifications",		(ASN.1): Parameterization of ASN.1 specifications",
	CCITT Recommendation X.683, July 2002.		CCITT Recommendation X.683, July 2002.
	[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
	Requirement Levels", BCP 14, RFC 2119, March 1997.
	7.2. Informative References		7.2. Informative References
	[CCITT.X209.1988]		[CCITT.X209.1988]
	International Telephone and Telegraph Consultative		International Telephone and Telegraph Consultative
	Committee, "Specification of Basic Encoding Rules for		Committee, "Specification of Basic Encoding Rules for
	Abstract Syntax Notation One (ASN.1)",		Abstract Syntax Notation One (ASN.1)",
	CCITT Recommendation X.209, 1988.		CCITT Recommendation X.209, 1988.
	[CCITT.X690.2002]		[CCITT.X690.2002]
	International International Telephone and Telegraph		International International Telephone and Telegraph
	skipping to change at page 24, line 9 ¶		skipping to change at page 24, line 9 ¶
	[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,		[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
	Housley, R., and W. Polk, "Internet X.509 Public Key		Housley, R., and W. Polk, "Internet X.509 Public Key
	Infrastructure Certificate and Certificate Revocation List		Infrastructure Certificate and Certificate Revocation List
	(CRL) Profile", RFC 5280, May 2008.		(CRL) Profile", RFC 5280, May 2008.
	Authors' Addresses		Authors' Addresses
	Carl Wallace		Carl Wallace
	Cygnacom Solutions		Cygnacom Solutions
	Suite 5200		Suite 5400
	7925 Jones Branch Drive		7925 Jones Branch Drive
	McLean, VA 22102		McLean, VA 22102
	Email: cwallace@cygnacom.com		Email: cwallace@cygnacom.com
	Charles Gardiner		Charles Gardiner
	BBN Technologies		BBN Technologies
	10 Moulton Street		10 Moulton Street
	Cambridge, MA 02138		Cambridge, MA 02138
End of changes. 9 change blocks.
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