| Network Working Group | J. Gould |
| Internet-Draft | VeriSign, Inc. |
| Intended status: Standards Track | K. Feher |
| Expires: February 22, 2019 | Neustar |
| August 21, 2018 |
Allocation Token Extension for the Extensible Provisioning Protocol (EPP)
draft-ietf-regext-allocation-token-10
This document describes an Extensible Provisioning Protocol (EPP) extension for including an Allocation Token in "query" and "transform" commands. The Allocation Token is used as a credential that authorizes a client to request the allocation of a specific object from the server, using one of the EPP transform commands including create and transfer.
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This document describes an extension mapping for version 1.0 of the Extensible Provisioning Protocol (EPP). This mapping, an extension to EPP object mappings like the EPP domain name mapping, supports passing an Allocation Token as a credential that authorizes a client to request the allocation of a specific object from the server, using one of the EPP transform commands including create and transfer.
Allocation is when a server assigns the sponsoring client of an object based on the use of an Allocation Token credential. Examples include allocating a registration based on a pre-eligibility Allocation Token, allocating a premium domain name registration based on an auction Allocation Token, allocating a registration based on a founders Allocation Token, and allocating an existing domain name held by the server or by a different sponsoring client based on an Allocation Token passed with a transfer command.
Clients pass an Allocation Token to the server for validation, and the server determines if the supplied Allocation Token is one supported by the server. It is up to server policy which EPP transform commands and which objects require the Allocation Token. The Allocation Token MAY be returned to an authorized client for passing out-of-band to a client that uses it with an EPP transform command.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.
XML is case sensitive. Unless stated otherwise, XML specifications and examples provided in this document MUST be interpreted in the character case presented in order to develop a conforming implementation.
In examples, "C:" represents lines sent by a protocol client and "S:" represents lines returned by a protocol server. Indentation and white space in the examples are provided only to illustrate element relationships and are not REQUIRED in the protocol.
The XML namespace prefix "allocationToken" is used for the namespace "urn:ietf:params:xml:ns:allocationToken-1.0", but implementations MUST NOT depend on it and instead employ a proper namespace-aware XML parser and serializer to interpret and output the XML documents.
The "abc123" token value is used as a placeholder value in the examples. The server MUST support token values that follow the Security Considerations section.
The domain object attribute values, including the "2fooBAR" <domain:pw> value, in the examples are provided for illustration purposes only. Refer to [RFC5731] for details on the domain object attributes.
This extension adds additional elements to EPP object mappings like the EPP domain name mapping. Only those new elements are described here.
The Allocation Token is a simple XML "token" type. The exact format of the Allocation Token is up to server policy. The server MAY have the Allocation Token for each object to match against the Allocation Token passed by the client to authorize the allocation of the object. The <allocationToken:allocationToken> element is used for all of the supported EPP commands as well as the info response. If the supplied Allocation Token passed to the server does not apply to the object, the server MUST return an EPP error result code of 2201.
Authorization information, like what is defined in the EPP domain name mapping, is associated with objects to facilitate transfer operations. The authorization information is assigned when an object is created. The Allocation Token and the authorization information are both credentials, but used for different purposes and used in different ways. The Allocation Token is used to facilitate the allocation of an object instead of transferring the sponsorship of the object. The Allocation Token is not managed by the client, but is validated by the server to authorize assigning the initial sponsoring client of the object.
An example <allocationToken:allocationToken> element with value of "abc123":
<allocationToken:allocationToken xmlns:allocationToken=
"urn:ietf:params:xml:ns:allocationToken-1.0">
abc123
</allocationToken:allocationToken>
A detailed description of the EPP syntax and semantics can be found in the EPP core protocol specification [RFC5730].
EPP provides three commands to retrieve object information: <check> to determine if an object can be provisioned, <info> to retrieve information associated with an object, and <transfer> to retrieve object transfer status information.
This extension defines additional elements to extend the EPP <check> command of an object mapping like [RFC5731].
This extension allows clients to check the availability of an object with an Allocation Token, as described in Section 2.1. Clients can check if an object can be created using the Allocation Token. The Allocation Token is applied to all object names included in the EPP <check> command.
Example <check> command for the allocation.example domain name using the <allocationToken:allocationToken> extension with the allocation token of 'abc123':
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?> C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> C: <command> C: <check> C: <domain:check C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> C: <domain:name>allocation.example</domain:name> C: </domain:check> C: </check> C: <extension> C: <allocationToken:allocationToken C: xmlns:allocationToken= C: "urn:ietf:params:xml:ns:allocationToken-1.0"> C: abc123 C: </allocationToken:allocationToken> C: </extension> C: <clTRID>ABC-12345</clTRID> C: </command> C:</epp>
If the query was successful, the server replies with a <check> response providing the availability status of the queried object based on the following Allocation Token cases, where the object is otherwise available:
Example <check> domain response for a <check> command using the <allocationToken:allocationToken> extension:
S:<?xml version="1.0" encoding="UTF-8"?> S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> S: <response> S: <result code="1000"> S: <msg lang="en-US">Command completed successfully</msg> S: </result> S: <resData> S: <domain:chkData S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> S: <domain:cd> S: <domain:name avail="0">allocation.example</domain:name> S: <domain:reason>Allocation Token mismatch</domain:reason> S: </domain:cd> S: </domain:chkData> S: </resData> S: <trID> S: <clTRID>ABC-DEF-12345</clTRID> S: <svTRID>54321-XYZ</svTRID> S: </trID> S: </response> S:</epp>
Example <check> command with the <allocationToken:allocationToken> extension for the allocation.example and allocation2.example domain names. Availability of allocation.example and allocation2.example domain names are based on the Allocation Token 'abc123':
C:<?xml version="1.0" encoding="UTF-8"?> C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> C: <command> C: <check> C: <domain:check C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> C: <domain:name>allocation.example</domain:name> C: <domain:name>allocation2.example</domain:name> C: </domain:check> C: </check> C: <extension> C: <allocationToken:allocationToken C: xmlns:allocationToken= C: "urn:ietf:params:xml:ns:allocationToken-1.0"> C: abc123 C: </allocationToken:allocationToken> C: </extension> C: <clTRID>ABC-DEF-12345</clTRID> C: </command> C:</epp>
Example <check> domain response for multiple domain names in the <check> command using the <allocationToken:allocationToken> extension:
S:<?xml version="1.0" encoding="UTF-8"?> S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> S: <response> S: <result code="1000"> S: <msg lang="en-US">Command completed successfully</msg> S: </result> S: <resData> S: <domain:chkData S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> S: <domain:cd> S: <domain:name avail="0">allocation.example</domain:name> S: <domain:reason>Allocation Token mismatch</domain:reason> S: </domain:cd> S: <domain:cd> S: <domain:name avail="1">allocation2.example</domain:name> S: </domain:cd> S: </domain:chkData> S: </resData> S: <trID> S: <clTRID>ABC-DEF-12345</clTRID> S: <svTRID>54321-XYZ</svTRID> S: </trID> S: </response> S:</epp>
This extension does not add any elements to the EPP <check> response described in the [RFC5730].
This extension defines additional elements to extend the EPP <info> command of an object mapping like [RFC5731].
The EPP <info> command allows a client to request information associated with an existing object. Authorized clients MAY retrieve the Allocation Token along with the other object information by supplying the <allocationToken:info> element in the command. Authorized clients MAY retrieve the Allocation Token along with the other object information using the <allocationToken:info> element. The <allocationToken:info> element is an empty element that serves as a marker to the server to return the <allocationToken:allocationToken> element in the info response. If the client is not authorized to receive the Allocation Token, the server MUST return an EPP error result code of 2201. If the client is authorized to receive the Allocation Token, but there is no Allocation Token associated with the object, the server MUST return an EPP error result code of 2303. The authorization is subject to server policy.
Example <info> command with the allocationToken:info extension for the allocation.example domain name:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?> C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> C: <command> C: <info> C: <domain:info C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0" C: xsi:schemaLocation="urn:ietf:params:xml:ns:domain-1.0 C: domain-1.0.xsd"> C: <domain:name>allocation.example</domain:name> C: </domain:info> C: </info> C: <extension> C: <allocationToken:info C: xmlns:allocationToken= C: "urn:ietf:params:xml:ns:allocationToken-1.0/> C: </extension> C: <clTRID>ABC-12345</clTRID> C: </command> C:</epp>
If the query was successful, the server replies with an <allocationToken:allocationToken> element along with the regular EPP <resData>. The <allocationToken:allocationToken> element is described in Section 2.1.
Example <info> domain response using the <allocationToken:allocationToken> extension:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?> S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> S: <response> S: <result code="1000"> S: <msg>Command completed successfully</msg> S: </result> S: <resData> S: <domain:infData S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> S: <domain:name>allocation.example</domain:name> S: <domain:roid>EXAMPLE1-REP</domain:roid> S: <domain:status s="pendingCreate"/> S: <domain:registrant>jd1234</domain:registrant> S: <domain:contact type="admin">sh8013</domain:contact> S: <domain:contact type="tech">sh8013</domain:contact> S: <domain:clID>ClientX</domain:clID> S: <domain:crID>ClientY</domain:crID> S: <domain:crDate>2012-04-03T22:00:00.0Z</domain:crDate> S: <domain:authInfo> S: <domain:pw>2fooBAR</domain:pw> S: </domain:authInfo> S: </domain:infData> S: </resData> S: <extension> S: <allocationToken:allocationToken S: xmlns:allocationToken= S: "urn:ietf:params:xml:ns:allocationToken-1.0"> S: abc123 S: </allocationToken:allocationToken> S: </extension> S: <trID> S: <clTRID>ABC-12345</clTRID> S: <svTRID>54321-XYZ</svTRID> S: </trID> S: </response> S:</epp>
This extension does not add any elements to the EPP <transfer> query command or <transfer> query response described in [RFC5730].
EPP provides five commands to transform objects: <create> to create an instance of an object, <delete> to delete an instance of an object, <renew> to extend the validity period of an object, <transfer> to manage object sponsorship changes, and <update> to change information associated with an object.
This extension defines additional elements to extend the EPP <create> command of an object mapping like [RFC5731].
The EPP <create> command provides a transform operation that allows a client to create an instance of an object. In addition to the EPP command elements described in an object mapping like [RFC5731], the command MUST contain a child <allocationToken:allocationToken> element for the client to be authorized to create and allocate the object. If the Allocation Token does not apply to the object, the server MUST return an EPP error result code of 2201.
Example <create> command to create a domain object with an Allocation Token:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?> C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> C: <command> C: <create> C: <domain:create C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> C: <domain:name>allocation.example</domain:name> C: <domain:registrant>jd1234</domain:registrant> C: <domain:contact type="admin">sh8013</domain:contact> C: <domain:contact type="tech">sh8013</domain:contact> C: <domain:authInfo> C: <domain:pw>2fooBAR</domain:pw> C: </domain:authInfo> C: </domain:create> C: </create> C: <extension> C: <allocationToken:allocationToken C: xmlns:allocationToken= C: "urn:ietf:params:xml:ns:allocationToken-1.0"> C: abc123 C: </allocationToken:allocationToken> C: </extension> C: <clTRID>ABC-12345</clTRID> C: </command> C:</epp>
This extension does not add any elements to the EPP <create> response described in the [RFC5730].
This extension does not add any elements to the EPP <delete> command or <delete> response described in the [RFC5730].
This extension does not add any elements to the EPP <renew> command or <renew> response described in the [RFC5730].
This extension defines additional elements to extend the EPP <transfer> request command of an object mapping like [RFC5731].
The EPP <transfer> request command provides a transform operation that allows a client to request the transfer of an object. In addition to the EPP command elements described in an object mapping like [RFC5731], the command MUST contain a child <allocationToken:allocationToken> element for the client to be authorized to transfer and allocate the object. The authorization associated with the Allocation Token is in addition to and does not replace the authorization mechanism defined for the object's <transfer> request command. If the Allocation Token is invalid or not required for the object, the server MUST return an EPP error result code of 2201.
Example <transfer> request command to allocate the domain object with the Allocation Token:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?> C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"> C: <command> C: <transfer op="request"> C: <domain:transfer C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"> C: <domain:name>example1.tld</domain:name> C: <domain:period unit="y">1</domain:period> C: <domain:authInfo> C: <domain:pw>2fooBAR</domain:pw> C: </domain:authInfo> C: </domain:transfer> C: </transfer> C: <extension> C: <allocationToken:allocationToken C: xmlns:allocationToken= C: "urn:ietf:params:xml:ns:allocationToken-1.0"> C: abc123 C: </allocationToken:allocationToken> C: </extension> C: <clTRID>ABC-12345</clTRID> C: </command> C:</epp>
This extension does not add any elements to the EPP <transfer> response described in the [RFC5730].
This extension does not add any elements to the EPP <update> command or <update> response described in the [RFC5730].
One schema is presented here that is the EPP Allocation Token Extension schema.
The formal syntax presented here is a complete schema representation of the object mapping suitable for automated validation of EPP XML instances. The BEGIN and END tags are not part of the schema; they are used to note the beginning and ending of the schema for URI registration purposes.
BEGIN
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:allocationToken="urn:ietf:params:xml:ns:allocationToken-1.0"
targetNamespace="urn:ietf:params:xml:ns:allocationToken-1.0"
elementFormDefault="qualified">
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0
Allocation Token Extension
</documentation>
</annotation>
<!-- Element used in info command to get allocation token. -->
<element name="info">
<complexType>
<complexContent>
<restriction base="anyType" />
</complexContent>
</complexType>
</element>
<!-- Allocation Token used in transform
commands and info response -->
<element name="allocationToken"
type="allocationToken:allocationTokenType" />
<simpleType name="allocationTokenType">
<restriction base="token">
<minLength value="1" />
</restriction>
</simpleType>
<!-- End of schema. -->
</schema>
END
This document uses URNs to describe XML namespaces and XML schemas conforming to a registry mechanism described in [RFC3688].
Registration request for the allocationToken namespace:
Registration request for the allocationToken XML schema:
The following registration of the EPP Extension Registry, described in [RFC7451], is requested:
Name of Extension: "Allocation Token Extension for the Extensible Provisioning Protocol (EPP)"
Document status: Standards Track
Reference: (insert reference to RFC version of this document)
Registrant Name and Email Address: IESG, <iesg@ietf.org>
TLDs: Any
IPR Disclosure: None
Status: Active
Notes: None
Note to RFC Editor: Please remove this section and the reference to RFC 7942 before publication.
This section records the status of known implementations of the protocol defined by this specification at the time of posting of this Internet-Draft, and is based on a proposal described in RFC 7942. The description of implementations in this section is intended to assist the IETF in its decision processes in progressing drafts to RFCs. Please note that the listing of any individual implementation here does not imply endorsement by the IETF. Furthermore, no effort has been spent to verify the information presented here that was supplied by IETF contributors. This is not intended as, and must not be construed to be, a catalog of available implementations or their features. Readers are advised to note that other implementations may exist.
According to RFC 7942, "this will allow reviewers and working groups to assign due consideration to documents that have the benefit of running code, which may serve as evidence of valuable experimentation and feedback that have made the implemented protocols more mature. It is up to the individual working groups to use this information as they see fit".
Organization: Verisign Inc.
Name: Verisign EPP SDK
Description: The Verisign EPP SDK includes both a full client implementation and a full server stub implementation of draft-ietf-regext-allocation-token.
Level of maturity: Production
Coverage: All aspects of the protocol are implemented.
Licensing: GNU Lesser General Public License
Contact: jgould@verisign.com
URL: https://www.verisign.com/en_US/channel-resources/domain-registry-products/epp-sdks
Organisation: Neustar Inc.
Name: Neustar EPP SDK
Description: The Neustar EPP SDK includes a full client implementation of draft-ietf-regext-allocation-token.
Level of maturity: Production
Coverage: All aspects of the protocol are implemented.
Licensing: GNU Lesser General Public License
Contact: quoc-anh.np@team.neustar
URL: http://registrytoolkit.neustar
Organisation: Neustar Inc.
Name: Neustar generic Top Level Domain (gTLD) Shared Registry System (SRS).
Description: The Neustar gTLD SRS implements the server side of draft-ietf-regext-allocation-token for several Top Level Domains.
Level of maturity: Production
Coverage: All server side aspects of the protocol are implemented.
Licensing: Proprietary
Contact: quoc-anh.np@team.neustar
Organization: Dot and Co
Name: Net::DRI
Description: Net::DRI implements the client-side of draft-ietf-regext-allocation-token.
Level of maturity: Production
Coverage: All client-side aspects of the protocol are implemented.
Licensing: GNU Lesser General Public License
Contact: netdri@dotandco.com
The mapping described in this document does not provide any security services beyond those described by EPP and protocol layers used by EPP. The security considerations described in these other specifications apply to this specification as well.
The mapping acts as a conduit for the passing of Allocation Tokens between a client and a server. The definition of the Allocation Token SHOULD be defined outside of this mapping. The following are security considerations in the definition and use of an Allocation Token:
The authors wish to acknowledge the original concept for this draft and the efforts in the initial versions of this draft by Trung Tran and Sharon Wodjenski.
Special suggestions that have been incorporated into this document were provided by Scott Hollenbeck, Benjamin Kaduk, Mirja Kuehlewind, Rubens Kuhl, Alexander Mayrhofer, Patrick Mevzek, Eric Rescoria, and Adam Roach.
| [RFC2119] | Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997. |
| [RFC3688] | Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004. |
| [RFC5730] | Hollenbeck, S., "Extensible Provisioning Protocol (EPP)", STD 69, RFC 5730, DOI 10.17487/RFC5730, August 2009. |
| [RFC5731] | Hollenbeck, S., "Extensible Provisioning Protocol (EPP) Domain Name Mapping", STD 69, RFC 5731, DOI 10.17487/RFC5731, August 2009. |
| [RFC7942] | Sheffer, Y. and A. Farrel, "Improving Awareness of Running Code: The Implementation Status Section", BCP 205, RFC 7942, DOI 10.17487/RFC7942, July 2016. |
| [RFC4648] | Josefsson, S., "The Base16, Base32, and Base64 Data Encodings", RFC 4648, DOI 10.17487/RFC4648, October 2006. |
| [RFC7451] | Hollenbeck, S., "Extension Registry for the Extensible Provisioning Protocol", RFC 7451, DOI 10.17487/RFC7451, February 2015. |
| [RFC8174] | Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017. |