Informational Add-on for HTTP over the Secure Sockets Layer (SSL) Protocol and/or the Transport Layer Security (TLS) Protocol
draft-hoehlhubmer-https-addon-07
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Active Internet-Draft (individual)
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Walter H.
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2014-05-27
(latest revision 2013-11-25)
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ISE
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Intended RFC status |
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Informational
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Network Working Group W. Hoehlhubmer
Internet-Draft Nov 25, 2013
Category: Best Current Practice
Intended status: Informational
Expires: May 25, 2014
Informational Add-on for HTTP over
the Secure Sockets Layer (SSL) Protocol and/or
the Transport Layer Security (TLS) Protocol
draft-hoehlhubmer-https-addon-07
Abstract
This document describes an Add-on for websites providing encrypted
connectivity (HTTP over TLS).
The Add-on has two parts, one for the Domain Name System (DNS) -
storing the X.509 certificate hashes - and one for the webserver
itself - an additional webpage providing specific informations.
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 May 25, 2014.
Copyright Notice
Copyright (c) 2013 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
Hoehlhubmer Expires May 25, 2014 [Page 1]
Internet-Draft Informational Add-on for HTTP over SSL/TLS Nov 2013
(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
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
1.1. Requirements Notation . . . . . . . . . . . . . . . . . . . 4
2. Implementing this Add-on . . . . . . . . . . . . . . . . . . 5
2.1. Implementing the DNS part . . . . . . . . . . . . . . . . . 5
2.1.1. Calculating the Hashes . . . . . . . . . . . . . . . . . 5
2.1.1.1. Calculating the Packed form . . . . . . . . . . . . . . 7
2.1.2. Formatting the Date and Time . . . . . . . . . . . . . . 7
2.1.3. Arbitrary String Attribute Syntax . . . . . . . . . . . . 7
2.1.4. DNS-entry Namespace . . . . . . . . . . . . . . . . . . 9
2.2. Implementing the HTTP part . . . . . . . . . . . . . . . . 9
2.2.1. Webpage Content . . . . . . . . . . . . . . . . . . . . . 10
2.2.2. Formating and Presenting the Webpage . . . . . . . . . . 11
3. DNS part Details . . . . . . . . . . . . . . . . . . . . . . 11
3.1. Handling Certificate Rollover . . . . . . . . . . . . . . . 11
3.2. Verification Procedure . . . . . . . . . . . . . . . . . . 12
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
5. Security Considerations . . . . . . . . . . . . . . . . . . . 12
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
7. Recommendations . . . . . . . . . . . . . . . . . . . . . . . 12
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.1. Normative References . . . . . . . . . . . . . . . . . . . 13
8.2. Informative References . . . . . . . . . . . . . . . . . . 13
9. Discussions . . . . . . . . . . . . . . . . . . . . . . . . . 16
A. Example certificates . . . . . . . . . . . . . . . . . . . . 17
A.1. The DER-encoded CA certificate . . . . . . . . . . . . . . 17
A.1.1. The CA's public key . . . . . . . . . . . . . . . . . . . 17
A.2. The DER-encoded SSL certificate . . . . . . . . . . . . . . 18
B. Script Examples for the Add-on webpage . . . . . . . . . . . 19
B.1. PHP-script . . . . . . . . . . . . . . . . . . . . . . . . 19
B.2. CGI-script: A BASH shell script . . . . . . . . . . . . . . 20
B.3. CGI-script: A compiled C program . . . . . . . . . . . . . 20
C. Sample Content of the Add-on webpage . . . . . . . . . . . . 23
C.1. A complete sample content . . . . . . . . . . . . . . . . . 23
C.1.1. ..., the client certificate part . . . . . . . . . . . . 24
C.2. Picking another cipher suite . . . . . . . . . . . . . . . 24
C.2.1. ..., and one more . . . . . . . . . . . . . . . . . . . 24
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 25
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