One document matched: draft-ietf-trade-iotp-http-05.txt
Differences from draft-ietf-trade-iotp-http-04.txt
Internet Open Trading Protocol (IOTP) HTTP Supplement
-------- ---- ------- -------- ------ ---- ----------
<draft-ietf-trade-iotp-http-05.txt>
Donald E. Eastlake 3rd
Chris J. Smith
Status of This Document
This draft is intended to become a Proposed Standard RFC.
Distribution of this document is unlimited. Comments should be sent
to the TRADE WG mailing list <ietf-trade@eListX.com> or to the
authors.
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas,
and its working groups. Note that other groups may also distribute
working documents as Internet-Drafts.
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."
The list of current Internet-Drafts can be accessed at
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.
Abstract
Internet Open Trading Protocol (IOTP [draft-ietf-trade-iotp-v1.0-
protocol-*.txt]) messages will be carried as XML documents. As such,
the goal of mapping to the transport layer is to ensure that the
underlying XML documents are carried successfully between the various
parties.
This documents describes that mapping for the Hyper Text Transport
Protocol (HTTP), Versions 1.0 and 1.1.
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Table of Contents
Status of This Document....................................1
Abstract...................................................1
Table of Contents..........................................2
1. Introduction............................................3
2. HTTP Servers and Clients................................3
3. HTTP Net Locations......................................3
4. Consumer Clients........................................3
4.1 Starting the IOTP Client and the Merchant IOTP Server..4
4.2 Ongoing IOTP Messages..................................4
4.3 Stopping an IOTP Transaction...........................5
5. Starting the Payment handler and Deliverer IOTP Servers.6
6. Security Considerations.................................6
7. IANA Considerations.....................................6
References.................................................8
Authors Addresses..........................................9
Expiration and File Name...................................9
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1. Introduction
Internet Open Trading Protocol (IOTP) messages will be carried as XML
[XML] documents. As such, the goal of mapping to the transport layer
is to ensure that the underlying XML documents are carried
successfully between the various parties.
This documents describes that mapping for the Hyper Text Transport
Protocol (HTTP), Versions 1.0 and 1.1 [RFCs 1945, 2616].
There may be future documents describing IOTP over email (SMTP), TCP,
cable TV, or other transports.
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 [RFC2119].
2. HTTP Servers and Clients
The structure of IOTP maps on to the structure of HTTP in the
following way:
The merchant, payment handler, delivery handler, and customer care
roles are all represented by HTTP servers. Each may be represented
by a separate server, or they may be combined in any combination.
The consumer role is represented by an HTTP client.
Note: A Merchant, may act in the role of a consumer, for example to
deposit electronic cash. In this case the Merchant, as an
organization rather than as a role, would need to be supported by an
HTTP client.
3. HTTP Net Locations
The Net Locations contained within the IOTP specification are all
URIs [RFC 2396]. If a secure connection is required or desired any
secure channel that both the HTTP Server and Client support may be
used, for example SSL version 3 or TLS [RFC 2246].
4. Consumer Clients
In most environments, the consumer agent will initially be an HTML
browser. However, current browsers do not provide the needed
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capability to act as an agent for the consumer for an IOTP
transaction. This leads to two requirements:
a method of starting and passing control to the IOTP client, and
a method of closing down the IOTP client cleanly and passing control
back to the HTML browser once the IOTP Transaction has finished.
4.1 Starting the IOTP Client and the Merchant IOTP Server
At some point, the HTTP client at the consumer will send an HTTP
request that is interpreted as an "IOTP Startup Request" by the
Merchant HTTP server. This might, for example, be the result of
clicking on a "pay" button. This message is a stand-in for a request
message of some form and the Merchant Server will respond with the
first IOTP Message in the form of an XML document.
The MIME type for all IOTP messages is: "application/iotp"; however
"application/x-iotp" has been in use for experimentation and
development and SHOULD also be recognized. See section 7 below for
the MIME type registration template for application/iotp. Because
HTTP is binary clean, no content-transfer-encoding is required. (See
[RFC 2376] re the application/xml type which has some similar
considerations.)
This HTTP response will be interpreted by the HTML browser as a
request to start the application associated with MIME type
"application/iotp", and to pass the content of this message to that
application.
At this point, the IOTP client will be started and have the first
message.
IOTP messages are short-lived. Therefore, the HTTP server should
avoid having its responses cached. In HTTP V1.0, the "nocache"
pragma can be used. This can be neglected on SSL/TLS secured
connections which are not cached and on HTTP POST requests in HTTP
v1.1 as in v1.1 POST responses are not cached.
4.2 Ongoing IOTP Messages
Data from earlier IOTP Messages in a transaction must be retained by
the IOTP Client so that it may (1) be copied to make up part of later
IOTP messages, (2) used in calculations to verify signatures in later
IOTP message, (3) be resent in some cases where a request has timed
out without response, (4) used as input to the Customer Care role in
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later versions of IOTP, etc. The way in which the data is copied
depends on the IOTP Transaction.
The IOTP messages contain Net Locations (e.g. the PayReqNetLocn)
which for HTTP will contain the URIs to which the IOTP client must
ship IOTP messages.
Subsequent IOTP messages (XML documents) will be sent using the POST
function of HTTP. The HTTP client has to perform full HTTP POST
requests.
The XML documents will be sent in a manner compatible with the
external encodings allowed by the XML [XML] specification.
4.3 Stopping an IOTP Transaction
The following should be read in conjunction with [draft-ietf-trade-
iotp-v1.0-protocol-*.txt]
An IOTP Transaction is complete when
-- the IOTP client decides to fail the IOTP Transaction for some
reason either by canceling the transaction or as a result of
discovering an error in an IOTP message received, or
-- a "time out" occurs or a connection fails, e.g. a response to an
IOTP Message, has not been received after some user-defined period
of Time (including retransmissions).
An IOTP Client which processes an IOTP Transaction which:
-- completes successfully (i.e. it has not received an Error Block
with a HardError or a Cancel Block) must direct the browser to the
Net Location specified in SuccessNetLocn in the Protocol Options
Component, i.e., cause it to do an HTTP GET with that URL.
-- does not complete successfully, because it has received some Error
Trading Block, must display the information in the Error Message,
stop the transaction, then pass control to the browser so that it
will do a GET on the Error Net Location specified for the role
from which the error was received.
-- is cancelled since a Cancel Block has been received, stops the
IOTP Transaction, and hands control to the browser so that it will
do a GET on the on the Cancel Net Location specified for the role
from which the Cancel Block was received.
-- is in error because an IOTP Message does not conform to this
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specification, sends an IOTP Message containing a Error Trading
Block to role from which the erroneous message was received and
the ErrorLogNetLoc specified for that role, stops the IOTP
Transaction, and hands control to the browser so that it will do a
GET from the Error Net Location specified for the role from which
the bad message was received.
-- has a "time out", must display a message describing the time out.
May give the user the option of cancelling or retrying and/or may
automatically retry. On failure due to time out, treat as an
error above.
Each implementation of an IOTP client may decide whether or not to
terminate the IOTP Client application immediately upon completing an
IOTP Transaction or whether to wait until it is closed down as a
result of, for example, user shut down or browser shut down.
5. Starting the Payment handler and Deliverer IOTP Servers
Payment Handler and Deliverer IOTP Servers are started by receiving
an IOTP Message which contains:
-- for a Payment handler, a Payment Request Block, and
-- for a Delivery Handler, a Delivery Request Block
6. Security Considerations
Security of Internet Open Trade Protocol messages is primarily
dependent on signatures within IOTP as described in [draft-ietf-
trade-iotp-v1.0-protocol-*.txt] and [draft-ietf-trade-iotp-v1.0-
dsig-*.txt]. Privacy protection for IOTP interactions should be
obtained by using a secure channel for IOTP messages, such as SSL/TLS
[RFC 2246].
Note that the security of payment protocols transported by IOTP is
the responsibility of those payment protocols, NOT of IOTP.
7. IANA Considerations
This specification defines the application/iotp mime type. The
registration template is as follows [RFC 2048]:
To: ietf-types@iana.org
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Subject: Registration of MIME media type APPLICATION/IOTP
MIME media type name: APPLICATION
MIME subtype name: IOTP
Required parameters: (none)
Optional parameters: charset - see RFC 2376
Encoding considerations: Content is XML and may in some cases
require quoted printable or base64 encoding. However, no encoding
is required for HTTP transport which is expected to be common.
Security considerations: IOTP includes provisions for digital
authentication but for confidentiality, other mechanisms such as
TLS should be used. See draft-ietf-trade-iotp-v1.0-protocol-
07.txt and draft-ietf-trade-iotp-v1.0-dsig-*.txt in RFC Editor's
queue.
Interoperability considerations: See draft-ietf-trade-iotp-v1.0-
protocol-07.txt in RFC Editor's queue.
Published specification: See draft-ietf-trade-iotp-v1.0-protocol-
07.txt and draft-ietf-trade-iotp-v1.0-dsig-*.txt in RFC Editor's
queue.
Applications which use this media type: Internet Open Trading
Protocol applications.
Additional information: (none)
Person & email address to contact for further information:
Name: Donald E. Eastlake 3rd
Email: Donald.Eastlake@motorola.com
Intended usage: COMMON
Author/Change controller: IETF
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References
[RFC 1945] - "Hypertext Transfer Protocol -- HTTP/1.0", T. Berners-
Lee, R. Fielding & H. Frystyk. May 1996.
[RFC 2048] - "Multipurpose Internet Mail Extensions (MIME) Part Four:
Registration Procedure", N. Freed, J. Klensin, J. Postel, November
1996.
[RFC 2119] - "Key words for use in RFCs to Indicate Requirement
Levels", S. Bradner, March 1997.
[RFC 2246] - "The TLS Protocol Version 1.0", T. Dierks, C. Allen.
January 1999.
[RFC 2376] - "XML Media Types", E. Whitehead, M. Murata. July 1998.
[RFC 2396] - "Uniform Resource Identifiers (URI): Generic Syntax", T.
Berners-Lee, R. Fielding, L. Masinter, August 1998.
[RFC 2616] - "Hypertext Transfer Protocol -- HTTP/1.1", R. Fielding,
J. Gettys, J. Mogul, H. Frystyk, L. Masinter, P. Leach, T. Berners-
Lee, June 1999.
[draft-ietf-trade-iotp-v1.0-protocol-*.txt] - David Burdett
[draft-ietf-trade-iotp-v1.0-dsig-*.txt] - Kent Davidson, Yoshiaki
Kawatsura
[XML] - "Extensible Markup Language (XML) 1.0"
<http://www.w3.org/TR/REC-xml>, Tim Bray, Jean Paoli, C. M.
Sperberg-McQueen, 10 February 1998
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Authors Addresses
Donald E. Eastlake 3rd
Motorola
65 Shindegan Hill Road
Carmel, NY 10512 USA
Telephone: +1 914-276-2668(h)
+1 508-261-5434(w)
FAX: +1 508-261-4447(w)
email: Donald.Eastlake@motorola.com
Chris J. Smith
Royal Bank of Canada
277 Front Street West
Toronto, Ontario M5V 3A4 CANADA
Telephone: +1 416-348-6090
FAX: +1 416-348-2210
email: chris.smith@royalbank.com
Expiration and File Name
This draft expires October 2000.
Its file name is draft-ietf-trade-iotp-http-05.txt.
D. Eastlake, C. Smith [Page 9]
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