Text Encodings of Some Security Related Structures
draft-josefsson-pkix-textual-00
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Simon Josefsson
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2012-01-27
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Network Working Group S. Josefsson
Internet-Draft SJD AB
Intended status: Informational January 27, 2012
Expires: July 30, 2012
Text Encodings of Some Security Related Structures
draft-josefsson-pkix-textual-00
Abstract
This document describe and discuss the text encodings of Public-Key
Infrastructure using X.509 (PKIX) Certificates, PKIX Certificate
Revocation Lists (CRLs), PKCS #10 Certificate Request Syntax, PKCS #7
structures, and Attribute Certificates. The text encodings are well-
known, implemented by several applications and libraries, and is
widely deployed. This document is intended to articulate the de-
facto rules that existing implementations operate by, and to give
recommendations that will promote interoperability going forward.
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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on July 30, 2012.
Copyright Notice
Copyright (c) 2012 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
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
Josefsson Expires July 30, 2012 [Page 1]
Internet-Draft Security-Related Text Encodings January 2012
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. General Considerations . . . . . . . . . . . . . . . . . . . . 3
3. Text Encoding of PKIX Certificate . . . . . . . . . . . . . . 4
4. Text Encoding of PKIX CRLs . . . . . . . . . . . . . . . . . . 5
5. Text Encoding of PKCS #10 Certification Request Syntax . . . . 5
6. Text Encoding of PKCS #7 Cryptographic Message Syntax . . . . 6
7. Text Encoding of Attribute Certificates . . . . . . . . . . . 6
8. Non-comforming Examples . . . . . . . . . . . . . . . . . . . 7
9. Security Considerations . . . . . . . . . . . . . . . . . . . 8
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 9
12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 9
12.1. Normative References . . . . . . . . . . . . . . . . . . 9
12.2. Informative References . . . . . . . . . . . . . . . . . 10
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 10
Josefsson Expires July 30, 2012 [Page 2]
Internet-Draft Security-Related Text Encodings January 2012
1. Introduction
Several security-related standards used on the Internet define data
formats that are normally encoded using Distinguished Encoding Rules
(DER) [CCITT.X690.2002], which is a binary data format. This
document is about text encodings of some of these formats. In
particular, we describe text encodings for the following formats.
1. Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile [RFC5280], for both
Certificates and Certificate Revocation Lists (CRLs).
2. PKCS #10: Certification Request Syntax [RFC2986].
3. PKCS #7: Cryptographic Message Syntax [RFC2315].
4. An Internet Attribute Certificate Profile for Authorization
[RFC5755].
One motivation for a text encoding is that a binary data format has
the disadvantage that it cannot be interchanged in textual
transports, such as e-mail or text documents. One advantage with
text encodings is that they are easy to modify without special-
purpose tools; for example, using a text editor you may concatenate
several certificates to form a certificate chain.
The exact history of the text encodings are unknown to the author of
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