Internet DRAFT - draft-gould-eppext-verificationcode

draft-gould-eppext-verificationcode







Network Working Group                                           J. Gould
Internet-Draft                                            VeriSign, Inc.
Intended status: Standards Track                          March 10, 2016
Expires: September 11, 2016


  Verification Code Extension for the Extensible Provisioning Protocol
                                 (EPP)
                 draft-gould-eppext-verificationcode-03

Abstract

   This document describes an Extensible Provisioning Protocol (EPP)
   extension for including a verification code for marking the data for
   a transform command as being verified by a 3rd party, which is
   referred to as the Verification Service Provider (VSP).  The
   verification code is digitally signed by the VSP using XML Signature
   and is "base64" encoded.  The XML Signature includes the VSP signer
   certificate, so the server can verify that the verification code
   originated from the VSP.

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 September 11, 2016.

Copyright Notice

   Copyright (c) 2016 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



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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions Used in This Document . . . . . . . . . . . .   3
   2.  Object Attributes . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Verification Code . . . . . . . . . . . . . . . . . . . .   4
       2.1.1.  Signed Code . . . . . . . . . . . . . . . . . . . . .   4
       2.1.2.  Encoded Signed Code . . . . . . . . . . . . . . . . .   6
     2.2.  Verification Profile  . . . . . . . . . . . . . . . . . .  11
   3.  EPP Command Mapping . . . . . . . . . . . . . . . . . . . . .  12
     3.1.  EPP Query Commands  . . . . . . . . . . . . . . . . . . .  12
       3.1.1.  EPP <check> Command . . . . . . . . . . . . . . . . .  12
       3.1.2.  EPP <info> Command  . . . . . . . . . . . . . . . . .  12
       3.1.3.  EPP <transfer> Command  . . . . . . . . . . . . . . .  24
     3.2.  EPP Transform Commands  . . . . . . . . . . . . . . . . .  25
       3.2.1.  EPP <create> Command  . . . . . . . . . . . . . . . .  25
       3.2.2.  EPP <delete> Command  . . . . . . . . . . . . . . . .  27
       3.2.3.  EPP <renew> Command . . . . . . . . . . . . . . . . .  28
       3.2.4.  EPP <transfer> Command  . . . . . . . . . . . . . . .  28
       3.2.5.  EPP <update> Command  . . . . . . . . . . . . . . . .  28
   4.  Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . .  28
     4.1.  Verification Code Extension Schema  . . . . . . . . . . .  28
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  32
     5.1.  XML Namespace . . . . . . . . . . . . . . . . . . . . . .  32
     5.2.  EPP Extension Registry  . . . . . . . . . . . . . . . . .  32
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  33
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  33
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  34
   Appendix B.  Change History . . . . . . . . . . . . . . . . . . .  34
     B.1.  Change from 00 to 01  . . . . . . . . . . . . . . . . . .  34
     B.2.  Change from 01 to 02  . . . . . . . . . . . . . . . . . .  34
     B.3.  Change from 02 to 03  . . . . . . . . . . . . . . . . . .  34
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  34

1.  Introduction

   This document describes an extension mapping for version 1.0 of the
   Extensible Provisioning Protocol (EPP) [RFC5730].  This mapping, an
   extension to EPP object mappings like the EPP domain name mapping
   [RFC5731], EPP host mapping [RFC5732], and EPP contact mapping
   [RFC5733], can be used to pass a verification code to one of the EPP
   transform commands.  The domain name object is used for examples in
   the document.  The verification code is signed using XML Signature



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   [W3C.CR-xmldsig-core2-20120124] and is "base64" encoded.  The
   "base64" encoded text of the verification code MUST conform to
   [RFC2045].  The verification code demonstrates that verification was
   done by a Verification Service Provider (VSP).

   The Verification Service Provider (VSP) is a certified party to
   verify that data is in compliance with the policies of a locality.  A
   locality MAY require the client to have data verified in accordance
   with local regulations or laws utilizing data sources not available
   to the server.  The VSP has access to the local data sources and is
   authorized to verify the data.  Examples include verifying that the
   domain name is not prohibited and verifying that the domain name
   registrant is a valid individual, organization, or business in the
   locality.  The data verified, and the objects and operations that
   require the verification code to be passed to the server is up to the
   policies of the locality.  The verification code represents a marker
   that the verification was completed.  The data verified by the VSP
   MUST be stored by the VSP along with the generated verification code
   to address any compliance issues.  The signer certificate and the
   digital signature of the verification code MUST be verified by the
   server.

1.1.  Conventions Used in This Document

   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].

   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 examples are provided only to illustrate element
   relationships and are not a REQUIRED feature of this protocol.

   "verificationCode-1.0" is used as an abbreviation for
   "urn:ietf:params:xml:ns:verificationCode-1.0".  The XML namespace
   prefix "verificationCode" is used, 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.








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2.  Object Attributes

   This extension adds additional elements to EPP object mappings like
   the EPP domain name mapping [RFC5731], EPP host mapping [RFC5732],
   and EPP contact mapping [RFC5733].  Only those new elements are
   described here.

2.1.  Verification Code

   The Verification Code is a formatted token, referred to as the
   Verification Code Token, that is digitally signed by a Verification
   Service Provider (VSP) using XML Signature
   [W3C.CR-xmldsig-core2-20120124], using the process described in
   Section 2.1.1, and is then "base64" encoded, as defined in
   Section 2.1.2.  The Verification Code Token syntax is specified using
   Augmented Backus-Naur Form (ABNF) grammar [RFC5234] as follows:

   Verification Code Token ABNF

   token     = vsp-id "-" verification-id ; Verification Code Token
   vsp-id    = 1*DIGIT                    ; VSP Identifier
   verification-id = 1*(DIGIT / ALPHA)    ; Verification Identifier

   For a VSP given VSP Identifier "1" and with a Verification Identifier
   of "abc123", the resulting Verification Code Token is "1-abc123".
   The Verification Identifier MUST be unique within a VSP and the VSP
   Identifier MUST be unique across supporting VSP's, so the
   Verification Code Token MUST be unique to an individual verification.
   The VSP Identifiers MAY require registration within an IANA registry.

2.1.1.  Signed Code

   The <verificationCode:signedCode> is the fragment of XML that is
   digitally signed using XML Signature [W3C.CR-xmldsig-core2-20120124].
   The <verificationCode:signedCode> includes a required "id" attribute
   of type XSD ID for use with an IDREF URI from the Signature element.
   The certificate of the issuer MUST be included with the Signature so
   it that can be chained with the issuer's certificate by the
   validating client.

   The <verificationCode:signedCode> element includes a REQUIRED "type"
   attribute for use in defining the type of the signed code.  It is up
   to the VSP and the server to define the valid values for the "type"
   attribute.  Examples of possible "type" attribute values include
   "domain" for verification of the domain name, "registrant" for
   verification of the registrant contact, or "domain-registrant" for
   verification of both the domain name and the registrant.  The typed
   signed code is used to indicate the verifications that are done by



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   the VSP.  The "type" attribute values MAY require registration within
   an IANA registry.

   A <verificationCode:signedCode> element substitutes for the
   <verificationCode:abstractSignedCode> abstract element to define a
   concrete definition of a signed code.  The
   <verificationCode:abstractSignedCode> element can be replaced by
   other signed code definitions using the XML schema substitution
   groups feature.

   The child elements of the <verificationCode:signedCode> element
   include:

   <verificationCode:code>  Contains the Verification Code Token as
       defined by the ABNF in Section 2.1.
   <Signature>  XML Signature [W3C.CR-xmldsig-core2-20120124] for the
       <verificationCode:signedCode>.  Use of a namespace prefix, like
       "dsig", is recommended for the XML Signature
       [W3C.CR-xmldsig-core2-20120124] elements.

   Example of a "domain" typed signed code using the
   <verificationCode:signedCode> element and XML Signature
   [W3C.CR-xmldsig-core2-20120124]:

   <verificationCode:signedCode
     xmlns:verificationCode=
     "urn:ietf:params:xml:ns:verificationCode-1.0"
     id="signedCode">
     <verificationCode:code type="domain">1-abc111
     </verificationCode:code>
     <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
      <SignedInfo>
       <CanonicalizationMethod
    Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
       <SignatureMethod
    Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
       <Reference URI="#signedCode">
        <Transforms>
         <Transform
    Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
        </Transforms>
        <DigestMethod
    Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
    <DigestValue>wgyW3nZPoEfpptlhRILKnOQnbdtU6ArM7ShrAfHgDFg=
    </DigestValue>
       </Reference>
      </SignedInfo>
      <SignatureValue>



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    jMu4PfyQGiJBF0GWSEPFCJjmywCEqR2h4LD+ge6XQ+JnmKFFCuCZS/3SLKAx0L1w
    QDFO2e0Y69k2G7/LGE37X3vOflobFM1oGwja8+GMVraoto5xAd4/AF7eHukgAymD
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    ipJsXNa6osTUw1CzA7jfwA==
      </SignatureValue>
      <KeyInfo>
       <X509Data>
       <X509Certificate>
    MIIESTCCAzGgAwIBAgIBAjANBgkqhkiG9w0BAQsFADBiMQswCQYDVQQGEwJVUzEL
    MAkGA1UECBMCQ0ExFDASBgNVBAcTC0xvcyBBbmdlbGVzMRMwEQYDVQQKEwpJQ0FO
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    wydgyVYAty7otkl/z3bZkCVT34gPvF70sR6+QxUy8u0LzF5A/beYaZpxSYG31amL
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      </X509Certificate>
      </X509Data>
      </KeyInfo>
     </Signature>
   </verificationCode:signedCode>

2.1.2.  Encoded Signed Code

   The <verificationCode:encodedSignedCode> element contains one or more
   encoded form of the digitally signed <verificationCode:signedCode>
   element, described in Section 2.1.1.

   The child elements of the <verificationCode:encodedSignedCode>
   element include:




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   <verificationCode:code>  One or more <verificationCode:code> elements
       that is an encoded form of the digitally signed
       <verificationCode:signedCode> element, described in
       Section 2.1.1, with the encoding defined by the "encoding"
       attribute with the default "encoding" value of "base64".  The
       "base64" encoded text of the <verificationCode:encodedSignedCode>
       element MUST conform to [RFC2045].

   Example <verificationCode:encodedSignedCode> element that contains
   one "base64" encoded <verificationCode:signedCode> contained in the
   <verificationCode:code> element:

   <verificationCode:encodedSignedCode
     xmlns:verificationCode=
       "urn:ietf:params:xml:ns:verificationCode-1.0">
     <verificationCode:code>
   ICAgICAgPHZlcmlmaWNhdGlvbkNvZGU6c2lnbmVkQ29kZQogICAgICAgIHhtbG5z
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   b25Db2RlOnNpZ25lZENvZGU+Cg==
     </verificationCode:code>
   </verificationCode:encodedSignedCode>

   Example <verificationCode:encodedSignedCode> element that contains
   two <verificationCode:code> elements ;.

   <?xml version="1.0" encoding="UTF-8" standalone="no"?>
   <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
     <command>
       <create>
         <domain:create
          xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
           <domain:name>domain.example</domain:name>
           <domain:registrant>jd1234</domain:registrant>
           <domain:contact type="admin">sh8013</domain:contact>
           <domain:contact type="tech">sh8013</domain:contact>
           <domain:authInfo>
             <domain:pw>2fooBAR</domain:pw>
           </domain:authInfo>
         </domain:create>



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       </create>
       <extension>
         <verificationCode:encodedSignedCode
           xmlns:verificationCode=
             "urn:ietf:params:xml:ns:verificationCode-1.0">
           <verificationCode:code>
   ICAgICAgPHZlcmlmaWNhdGlvbkNvZGU6c2lnbmVkQ29kZQogICAgICAgIHhtbG5z
   OnZlcmlmaWNhdGlvbkNvZGU9CiAgICAgICAgICAidXJuOmlldGY6cGFyYW1zOnht
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           </verificationCode:code>
           <verificationCode:code>
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   dwpEZ1lEVlFRSUV3ZFZibXR1YjNkdU1SQXdEZ1lEVlFRSEV3ZFZibXR1YjNkdU1S
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           </verificationCode:code>
       </verificationCode:encodedSignedCode>
       </extension>
       <clTRID>ABC-12345</clTRID>
     </command>
   </epp>

2.2.  Verification Profile

   A Verification Profile defines the set of verification code types,
   the commands that the verification code types are required,
   supported, or not supported, and the grace period by which the
   verification code types MUST be set.  A server MAY support many
   verification profiles, each with a unique name and a unique
   verification policy that is implemented by the server.  Each client
   MAY have zero or more server assigned verification profiles that will
   enforce the required verification policies.  Most likely a client
   will be assigned zero or one server assigned verification profile,
   but overlapping profiles is possible.  Overlapping verification
   profiles MUST be treated as a logical "and" of the policies by the




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   server.  If no verification profile is assigned to the client, no
   additional verification is required by the client.

3.  EPP Command Mapping

   A detailed description of the EPP syntax and semantics can be found
   in the EPP core protocol specification [RFC5730].

3.1.  EPP Query Commands

   EPP provides three commands to retrieve object information: <check>
   to determine if an object is known to the server, <info> to retrieve
   detailed information associated with an object, and <transfer> to
   retrieve object transfer status information.

3.1.1.  EPP <check> Command

   This extension does not add any elements to the EPP <check> command
   or <check> response described in the [RFC5730].

3.1.2.  EPP <info> Command

   This extension defines additional elements to extend the EPP <info>
   command of an object mapping like the EPP domain name mapping
   [RFC5731], EPP host mapping [RFC5732], and EPP contact mapping
   [RFC5733].

   The EPP <info> command is used to retrieve the verification
   information.  The verification information is based on the
   verification profile, as defined in Section 2.2, set in the server
   for the client.  The <verificationCode:info> element is an empty
   element that indicates that the client requests the verification
   information.  The OPTIONAL "profile" attribute can be used by the
   client to explicitly specify a verification profile, as defined in
   Section 2.2, to base the verification information on.  It is up to
   server policy on the set of verification profiles that the client is
   allowed to explicitly specify, and if the client is not allowed, the
   server MUST return the 2201 error response.













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   Example <info> domain command with the <verificationCode:info>
   extension to retrieve the verification information for the domain
   "domain.example", using the profiles associated with the client:

   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:        <domain:name>domain.example</domain:name>
   C:      </domain:info>
   C:    </info>
   C:    <extension>
   C:      <verificationCode:info
   C:        xmlns:verificationCode=
   C:          "urn:ietf:params:xml:ns:verificationCode-1.0"/>
   C:    </extension>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   Example <info> domain command with the <verificationCode:info>
   extension to retrieve the verification information for the domain
   "domain.example", using the profiles associated with the client and
   with the authorization information to retrieve the verification codes
   from the non-sponsoring client:

   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:        <domain:name>domain.example</domain:name>
   C:        <domain:authInfo>
   C:          <domain:pw>2fooBAR</domain:pw>
   C:        </domain:authInfo>
   C:      </domain:info>
   C:    </info>
   C:    <extension>
   C:      <verificationCode:info
   C:        xmlns:verificationCode=
   C:          "urn:ietf:params:xml:ns:verificationCode-1.0"/>
   C:    </extension>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>



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   Example <info> domain command with the <verificationCode:info>
   extension to retrieve the verification information for the domain
   "domain.example", using the the "sample" profile:

   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:        <domain:name>domain.example</domain:name>
   C:      </domain:info>
   C:    </info>
   C:    <extension>
   C:      <verificationCode:info
   C:        xmlns:verificationCode=
   C:          "urn:ietf:params:xml:ns:verificationCode-1.0"
   C:        profile="sample"/>
   C:    </extension>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   If the query was successful, the server replies with a
   <verificationCode:infData> element along with the regular EPP
   <resData>.  The <verificationCode:infData> element contains the
   following child elements:

   <verificationCode:status>  The status of the verification for the
       object, using all of the verification profiles assigned to the
       client.  There are four possible values for the status:


       notApplicable  The status is not applicable to the client since
           there is no assigned verification profile.
       nonCompliant  The object is non-compliant according to the
           verification profiles.  If at least one of the profiles is
           "nonCompliant", the object is "nonCompliant".
       pendingCompliance  The object is not in compliance with the
           verification profiles, but has a grace period to set the
           required set of verification codes, as reflected by the due
           date of the verification code type.  If at least one of the
           profiles is "pendingCompliance" and none of the profiles is
           "nonCompliant", the object is "pendingCompliance".
       compliant  The object is compliant with the verification
           profiles.  If All of the profiles for the object are
           "compliant" or if the object has no assignd profiles, the
           object is "compliant".



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   <verificationCode:profile>  Zero or more OPTIONAL
       <verificationCode:profile> elements that defines the verification
       status of the object based on the profile.  The required "name"
       attribute defines the name of the profile.  The
       <verificationCode:profile> element contains the following child
       elements:


       <verificationCode:status>  The status of the verification for the
           object and the profile.  There are four possible values for
           the status:


           notApplicable  The profile status is not applicable to the
               client based on the assigned verification profiles or the
               profile specified.
           nonCompliant  The object is non-compliant according to the
               verification profile.
           pendingCompliance  The object is not in compliance with the
               verification profile, but has a grace period to set the
               required set of verification codes, as reflected by the
               due date of the verification code type.
           compliant  The object is compliant with the verification
               profile.
       <verificationCode:missing>  OPTIONAL list of missing verification
           code types.  The <verificationCode:missing> element is
           returned only if there is at least one missing verification
           code type and based on server policy.  The
           <verificationCode:missing> element contains the following
           child elements:


           <verificationCode:code>  One or more <verificationCode:code>
               elements that is empty with the REQUIRED "type" attribute
               that indicates the verification code type and the
               REQUIRED "due" attribute that indicates when the
               verification code type was or is due.  Past due
               verification code types will result in the
               <verificationCode:status> element being set to
               "nonCompliant".
       <verificationCode:set>  OPTIONAL list of set verification codes.
           The <verificationCode:set> element is returned only if there
           is at least one set verification code.  The
           <verificationCode:set> element contains the following child
           elements:






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           <verificationCode:code>  One or more <verificationCode:code>
               elements containing the verification code with a REQUIRED
               "type" attribute that indicates the code type and a
               REQUIRED "date" attribute that indicates when the
               verification code was set.  The inclusion of the code
               value is up server policy, so if the server determines
               that the code value cannot be exposed to a non-sponsoring
               client, the <verificationCode:code> element MUST be
               empty.

   Example <info> domain response using the <verificationCode:infData>
   extension for a compliant domain using the "sample" profile, and with
   the two verification codes, from the sponsoring or authorized client:

   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>domain.example</domain:name>
   S:        <domain:roid>DOMAIN-REP</domain:roid>
   S:        <domain:status s="ok"/>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>2010-04-03T22:00:00.0Z
   S:        </domain:crDate>
   S:        <domain:exDate>2015-04-03T22:00:00.0Z
   S:        </domain:exDate>
   S:        <domain:authInfo>
   S:          <domain:pw>2fooBAR</domain:pw>
   S:        </domain:authInfo>
   S:      </domain:infData>
   S:    </resData>
   S:    <extension>
   S:      <verificationCode:infData
   S:        xmlns:verificationCode=
   S:        "urn:ietf:params:xml:ns:verificationCode-1.0">
   S:        <verificationCode:status>compliant
   S:        </verificationCode:status>
   S:        <verificationCode:profile name="sample">
   S:          <verificationCode:status>compliant
   S:          </verificationCode:status>
   S:          <verificationCode:set>
   S:            <verificationCode:code type="domain"



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   S:              date="2010-04-03T22:00:00.0Z">1-abc333
   S:            </verificationCode:code>
   S:            <verificationCode:code type="registrant"
   S:              date="2010-04-03T22:00:00.0Z">1-abc444
   S:            </verificationCode:code>
   S:          </verificationCode:set>
   S:        </verificationCode:profile>
   S:      </verificationCode:infData>
   S:    </extension>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   Example <info> domain response using the <verificationCode:infData>
   extension for a compliant domain using the "sample" profile, and with
   the two verification codes, from the sponsoring or authorized client
   that also includes codes set for the "sample2" profile:

   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>domain.example</domain:name>
   S:        <domain:roid>DOMAIN-REP</domain:roid>
   S:        <domain:status s="ok"/>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>2010-04-03T22:00:00.0Z
   S:        </domain:crDate>
   S:        <domain:exDate>2015-04-03T22:00:00.0Z
   S:        </domain:exDate>
   S:        <domain:authInfo>
   S:          <domain:pw>2fooBAR</domain:pw>
   S:        </domain:authInfo>
   S:      </domain:infData>
   S:    </resData>
   S:    <extension>
   S:      <verificationCode:infData
   S:        xmlns:verificationCode=
   S:        "urn:ietf:params:xml:ns:verificationCode-1.0">



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   S:        <verificationCode:status>compliant
   S:        </verificationCode:status>
   S:        <verificationCode:profile name="sample">
   S:          <verificationCode:status>compliant
   S:          </verificationCode:status>
   S:          <verificationCode:set>
   S:            <verificationCode:code type="domain"
   S:              date="2010-04-03T22:00:00.0Z">1-abc333
   S:            </verificationCode:code>
   S:            <verificationCode:code type="registrant"
   S:              date="2010-04-03T22:00:00.0Z">1-abc444
   S:            </verificationCode:code>
   S:          </verificationCode:set>
   S:        </verificationCode:profile>
   S:        <verificationCode:profile name="sample2">
   S:          <verificationCode:status>notApplicable
   S:          </verificationCode:status>
   S:          <verificationCode:set>
   S:            <verificationCode:code type="domain"
   S:              date="2010-04-03T22:00:00.0Z">2-abc555
   S:            </verificationCode:code>
   S:          </verificationCode:set>
   S:        </verificationCode:profile>
   S:      </verificationCode:infData>
   S:    </extension>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>




















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   Example <info> domain response using the <verificationCode:infData>
   extension for a compliant domain using the "sample" profile, and with
   the two verification code types, from the non-sponsoring client:

   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>domain.example</domain:name>
   S:        <domain:roid>DOMAIN-REP</domain:roid>
   S:        <domain:status s="ok"/>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>2010-04-03T22:00:00.0Z
   S:        </domain:crDate>
   S:        <domain:exDate>2015-04-03T22:00:00.0Z
   S:        </domain:exDate>
   S:      </domain:infData>
   S:    </resData>
   S:    <extension>
   S:      <verificationCode:infData
   S:        xmlns:verificationCode=
   S:        "urn:ietf:params:xml:ns:verificationCode-1.0">
   S:        <verificationCode:status>compliant
   S:        </verificationCode:status>
   S:        <verificationCode:profile name="sample">
   S:          <verificationCode:status>compliant
   S:          </verificationCode:status>
   S:          <verificationCode:set>
   S:            <verificationCode:code type="domain"
   S:              date="2010-04-03T22:00:00.0Z"/>
   S:            <verificationCode:code type="registrant"
   S:              date="2010-04-03T22:00:00.0Z"/>
   S:          </verificationCode:set>
   S:        </verificationCode:profile>
   S:      </verificationCode:infData>
   S:    </extension>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>



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   Example <info> domain response using the <verificationCode:infData>
   extension for a non-compliant domain using the "sample" profile, and
   with the verification code types missing along with their due dates:
















































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   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>domain.example</domain:name>
   S:        <domain:roid>DOMAIN-REP</domain:roid>
   S:        <domain:status s="serverHold"/>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>2010-04-03T22:00:00.0Z
   S:        </domain:crDate>
   S:        <domain:exDate>2015-04-03T22:00:00.0Z
   S:        </domain:exDate>
   S:      </domain:infData>
   S:    </resData>
   S:    <extension>
   S:      <verificationCode:infData
   S:        xmlns:verificationCode=
   S:        "urn:ietf:params:xml:ns:verificationCode-1.0">
   S:        <verificationCode:status>nonCompliant
   S:        </verificationCode:status>
   S:        <verificationCode:profile name="sample">
   S:          <verificationCode:status>nonCompliant
   S:          </verificationCode:status>
   S:          <verificationCode:missing>
   S:            <verificationCode:code
   S:              type="domain"
   S:              due="2010-04-03T22:00:00.0Z"/>
   S:            <verificationCode:code
   S:              type="registrant"
   S:              due="2010-04-08T22:00:00.0Z"/>
   S:          </verificationCode:missing>
   S:        </verificationCode:profile>
   S:      </verificationCode:infData>
   S:    </extension>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   Example <info> domain response using the <verificationCode:infData>



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   extension for a pending compliance domain using the "sample" profile,
   with the verification code type missing along with the due date, and
   with set verification code:
















































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   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>domain.example</domain:name>
   S:        <domain:roid>DOMAIN-REP</domain:roid>
   S:        <domain:status s="ok"/>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>2010-04-03T22:00:00.0Z
   S:        </domain:crDate>
   S:        <domain:exDate>2015-04-03T22:00:00.0Z
   S:        </domain:exDate>
   S:      </domain:infData>
   S:    </resData>
   S:    <extension>
   S:      <verificationCode:infData
   S:        xmlns:verificationCode=
   S:        "urn:ietf:params:xml:ns:verificationCode-1.0">
   S:        <verificationCode:status>pendingCompliance
   S:        </verificationCode:status>
   S:        <verificationCode:profile name="sample">
   S:          <verificationCode:status>pendingCompliance
   S:          </verificationCode:status>
   S:          <verificationCode:missing>
   S:            <verificationCode:code
   S:              type="registrant"
   S:              due="2010-04-08T22:00:00.0Z"/>
   S:          </verificationCode:missing>
   S:          <verificationCode:set>
   S:            <verificationCode:code type="domain"
   S:              date="2010-04-03T22:00:00.0Z">1-abc333
   S:            </verificationCode:code>
   S:          </verificationCode:set>
   S:        </verificationCode:profile>
   S:      </verificationCode:infData>
   S:    </extension>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>



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   Example <info> domain response using the <verificationCode:infData>
   extension for a client that does not have a verification profile
   assigned:

   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>domain.example</domain:name>
   S:        <domain:roid>DOMAIN-REP</domain:roid>
   S:        <domain:status s="ok"/>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>2010-04-03T22:00:00.0Z
   S:        </domain:crDate>
   S:        <domain:exDate>2015-04-03T22:00:00.0Z
   S:        </domain:exDate>
   S:      </domain:infData>
   S:    </resData>
   S:    <extension>
   S:      <verificationCode:infData
   S:        xmlns:verificationCode=
   S:        "urn:ietf:params:xml:ns:verificationCode-1.0">
   S:        <verificationCode:status>notApplicable
   S:        </verificationCode:status>
   S:      </verificationCode:infData>
   S:    </extension>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

3.1.3.  EPP <transfer> Command

   This extension does not add any elements to the EPP <transfer> query
   command or <transfer> response described in the [RFC5730].








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3.2.  EPP Transform Commands

   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.

3.2.1.  EPP <create> Command

   This extension defines additional elements to extend the EPP <create>
   command of an object mapping like the EPP domain name mapping
   [RFC5731], EPP host mapping [RFC5732], and EPP contact mapping
   [RFC5733].

   The EPP <create> command provides a transform operation that allows a
   client to create an object.  In addition to the EPP command elements
   described in an object mapping like [RFC5731], the command MAY
   contain a child <verificationCode:encodedSignedCode> element, as
   defined in Section 2.1.2, that identifies the extension namespace for
   the client to provide proof of verification by a Verification Service
   Provider (VSP).  The server MAY support multiple policies for the
   passing of the <verificationCode:encodedSignedCode> element based on
   the client profile, which include:

   required  The client MUST pass a valid
       <verificationCode:encodedSignedCode> element containing the
       required set of verification codes.  If a
       <verificationCode:encodedSignedCode> element is not passed or the
       required set of verification codes is not included, the server
       MUST return an EPP error result code of 2306.  If an invalid
       <verificationCode:encodedSignedCode> element is passed, the
       server MUST return an EPP error result code of 2005.
   optional  The client MAY pass a valid
       <verificationCode:encodedSignedCode> element.  If an invalid
       <verificationCode:encodedSignedCode> element is passed, the
       server MUST return an EPP error result code of 2005.
   not supported  The client MUST NOT pass a
       <verificationCode:encodedSignedCode> element.  If a
       <verificationCode:encodedSignedCode> element is passed, the
       server MUST return an EPP error result code of 2102.

   Example <create> command to create a domain object with a
   verification code:

   C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
   C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
   C:  <command>



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   C:    <create>
   C:      <domain:create
   C:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   C:        <domain:name>domain.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:      <verificationCode:encodedSignedCode
   C:        xmlns:verificationCode=
   C:          "urn:ietf:params:xml:ns:verificationCode-1.0">
   C:        <verificationCode:code>
   C:ICAgICAgPHZlcmlmaWNhdGlvbkNvZGU6c2lnbmVkQ29kZQogICAgICAgIHhtbG5z
   C:OnZlcmlmaWNhdGlvbkNvZGU9CiAgICAgICAgICAidXJuOmlldGY6cGFyYW1zOnht
   C:bDpuczp2ZXJpZmljYXRpb25Db2RlLTEuMCIKICAgICAgICAgIGlkPSJzaWduZWRD
   C:b2RlIj4KICAgCQk8dmVyaWZpY2F0aW9uQ29kZTpjb2RlPjEtYWJjMTIzPC92ZXJp
   C:ZmljYXRpb25Db2RlOmNvZGU+CiAgPFNpZ25hdHVyZSB4bWxucz0iaHR0cDovL3d3
   C:dy53My5vcmcvMjAwMC8wOS94bWxkc2lnIyI+CiAgIDxTaWduZWRJbmZvPgogICAg
   C:PENhbm9uaWNhbGl6YXRpb25NZXRob2QKIEFsZ29yaXRobT0iaHR0cDovL3d3dy53
   C:My5vcmcvMjAwMS8xMC94bWwtZXhjLWMxNG4jIi8+CiAgICA8U2lnbmF0dXJlTWV0
   C:aG9kCiBBbGdvcml0aG09Imh0dHA6Ly93d3cudzMub3JnLzIwMDEvMDQveG1sZHNp
   C:Zy1tb3JlI3JzYS1zaGEyNTYiLz4KICAgIDxSZWZlcmVuY2UgVVJJPSIjc2lnbmVk
   C:Q29kZSI+CiAgICAgPFRyYW5zZm9ybXM+CiAgICAgIDxUcmFuc2Zvcm0KIEFsZ29y
   C:aXRobT0iaHR0cDovL3d3dy53My5vcmcvMjAwMC8wOS94bWxkc2lnI2VudmVsb3Bl
   C:ZC1zaWduYXR1cmUiLz4KICAgICA8L1RyYW5zZm9ybXM+CiAgICAgPERpZ2VzdE1l
   C:dGhvZAogQWxnb3JpdGhtPSJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGVu
   C:YyNzaGEyNTYiLz4KIDxEaWdlc3RWYWx1ZT53Z3lXM25aUG9FZnBwdGxoUklMS25P
   C:UW5iZHRVNkFyTTdTaHJBZkhnREZnPTwvRGlnZXN0VmFsdWU+CiAgICA8L1JlZmVy
   C:ZW5jZT4KICAgPC9TaWduZWRJbmZvPgogICA8U2lnbmF0dXJlVmFsdWU+CiBqTXU0
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   C:CiBqWVJNSUFNek01N0hIUUErNmVhWGVmUnZ0UEVUZ1VPNGFWSVZTdWdjNE9VQVpa
   C:d2JZY1pyQzZ3T2FRcXFxQVppCiAzMGFQT0JZYkF2SE1TbVdTUytoRmtic2hvbUpm
   C:SHhiOTdURDJncmxZTnJRSXpxWGs3V2JIV3kyU1lkQStzSS9aCiBpcEpzWE5hNm9z
   C:VFV3MUN6QTdqZndBPT0KICAgPC9TaWduYXR1cmVWYWx1ZT4KICAgPEtleUluZm8+
   C:CiAgICA8WDUwOURhdGE+CiAgICA8WDUwOUNlcnRpZmljYXRlPgogTUlJRVNUQ0NB
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   C:d0pWVXpFTAogTUFrR0ExVUVDQk1DUTBFeEZEQVNCZ05WQkFjVEMweHZjeUJCYm1k
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   C:eEpKUTBGT1RpQlVUVU5JSUZSRlUxUWdRMEV3SGhjTk1UTXdNakE0TURBdwogTURB
   C:d1doY05NVGd3TWpBM01qTTFPVFU1V2pCc01Rc3dDUVlEVlFRR0V3SlZVekVMTUFr



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   C:R0ExVUVDQk1DUTBFeAogRkRBU0JnTlZCQWNUQzB4dmN5QkJibWRsYkdWek1SY3dG
   C:UVlEVlFRS0V3NVdZV3hwWkdGMGIzSWdWRTFEU0RFaAogTUI4R0ExVUVBeE1ZVm1G
   C:c2FXUmhkRzl5SUZSTlEwZ2dWRVZUVkNCRFJWSlVNSUlCSWpBTkJna3Foa2lHOXcw
   C:QgogQVFFRkFBT0NBUThBTUlJQkNnS0NBUUVBby9jd3ZYaGJWWWwwUkRXV3ZveWVa
   C:cEVUVlpWVmNNQ292VVZOZy9zdwogV2ludU1nRVdnVlFGcnoweEEwNHBFaFhDRlZ2
   C:NGV2YlVwZWtKNWJ1cVUxZ21ReU9zQ0tRbGhPSFRkUGp2a0M1dQogcERxYTUxRmxr
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   C:L3ozYlprQ1ZUMzRnUHZGNzBzUjYrUXhVeTh1MEx6RjVBL2JlWWFacHhTWUczMWFt
   C:TAogQWRYaXRUV0ZpcGFJR2VhOWxFR0ZNMEw5K0JnN1h6Tm40blZMWG9reUVCM2Jn
   C:UzRzY0c2UXpuWDIzRkdrCiAgIDwvWDUwOUNlcnRpZmljYXRlPgogICA8L1g1MDlE
   C:YXRhPgogICA8L0tleUluZm8+CiAgPC9TaWduYXR1cmU+CgkJPC92ZXJpZmljYXRp
   C:b25Db2RlOnNpZ25lZENvZGU+Cg==
   C:        </verificationCode:code>
   C:      </verificationCode:encodedSignedCode>
   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].

3.2.2.  EPP <delete> Command

   This extension defines additional elements to extend the EPP <delete>
   command and response in the same fashion as defined for the EPP
   <create> Command (Section 3.2.1).







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3.2.3.  EPP <renew> Command

   This extension defines additional elements to extend the EPP <renew>
   command and response in the same fashion as defined for the EPP
   <create> Command (Section 3.2.1).

3.2.4.  EPP <transfer> Command

   This extension defines additional elements to extend the EPP
   <transfer> command and response in the same fashion as defined for
   the EPP <create> Command (Section 3.2.1).

3.2.5.  EPP <update> Command

   This extension defines additional elements to extend the EPP <update>
   command and response in the same fashion as defined for the EPP
   <create> Command (Section 3.2.1).

4.  Formal Syntax

   One schema is presented here that is the EPP Verification Code
   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.

4.1.  Verification Code Extension Schema

   BEGIN
   <?xml version="1.0" encoding="UTF-8"?>
   <schema
     targetNamespace=
       "urn:ietf:params:xml:ns:verificationCode-1.0"
     xmlns:verificationCode=
       "urn:ietf:params:xml:ns:verificationCode-1.0"
     xmlns:dsig="http://www.w3.org/2000/09/xmldsig#"
     xmlns="http://www.w3.org/2001/XMLSchema"
     elementFormDefault="qualified">

     <annotation>
       <documentation>
         Extensible Provisioning Protocol v1.0
         Verification Code Extension.
       </documentation>
     </annotation>



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     <import namespace="http://www.w3.org/2000/09/xmldsig#"
       schemaLocation="xmldsig-core-schema.xsd"/>

     <!-- Abstract signed code for substitution -->
     <element name="abstractSignedCode"
       type="verificationCode:abstractSignedCodeType"
       abstract="true"/>

     <!-- Empty type for use in extending for a signed code -->
     <complexType name="abstractSignedCodeType"/>

     <!-- Definition of concrete signed code -->
     <element name="signedCode"
       type="verificationCode:signedCodeType"
       substitutionGroup="verificationCode:abstractSignedCode"/>

     <complexType name="signedCodeType">
       <complexContent>
         <extension base="verificationCode:abstractSignedCodeType">
           <sequence>
             <element name="code"
               type="verificationCode:verificationCodeType"/>
             <element ref="dsig:Signature"/>
           </sequence>
           <attribute name="id" type="ID" use="required"/>
         </extension>
       </complexContent>
     </complexType>

     <simpleType name="verificationCodeValueType">
       <restriction base="token">
           <pattern value="\d+-[A-Za-z0-9]+"/>
       </restriction>
     </simpleType>

     <complexType name="verificationCodeType">
       <simpleContent>
         <extension base=
           "verificationCode:verificationCodeValueType">
           <attribute name="type" type="token"
             use="required"/>
         </extension>
       </simpleContent>
     </complexType>

     <!-- Definition of an encoded signed code -->
     <element name="encodedSignedCode"
       type="verificationCode:encodedSignedCodeListType"/>



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     <complexType name="encodedSignedCodeListType">
       <sequence>
          <element name="code"
             type="verificationCode:encodedSignedCodeType"
             minOccurs="1" maxOccurs="unbounded"/>
       </sequence>
     </complexType>

     <complexType name="encodedSignedCodeType">
       <simpleContent>
         <extension base="token">
           <attribute name="encoding"
             type="token" default="base64"/>
         </extension>
       </simpleContent>
     </complexType>

     <!-- info command extension elements -->
     <element name="info" type="verificationCode:infoType"/>

     <complexType name="infoType">
       <simpleContent>
         <extension base="token">
            <attribute name="profile" type="token"/>
         </extension>
       </simpleContent>
     </complexType>


     <!-- info response extension elements -->
     <element name="infData" type="verificationCode:infDataType"/>

     <complexType name="infDataType">
       <sequence>
         <element name="status"
           type="verificationCode:statusEnum"/>
         <element name="profile"
           type="verificationCode:profileDataType"
           minOccurs="0" maxOccurs="unbounded"/>
       </sequence>
     </complexType>

     <complexType name="profileDataType">
       <sequence>
         <element name="status"
           type="verificationCode:statusEnum"/>
         <element name="missing"
           type="verificationCode:missingCodes"



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           minOccurs="0"/>
         <element name="set"
           type="verificationCode:codesType"
           minOccurs="0"/>
       </sequence>
       <attribute name="name" type="token"/>
     </complexType>

     <simpleType name="statusEnum">
       <restriction base="token">
         <enumeration value="notApplicable"/>
         <enumeration value="nonCompliant"/>
         <enumeration value="pendingCompliance"/>
         <enumeration value="compliant"/>
       </restriction>
     </simpleType>

     <complexType name="missingVerificationCode">
       <simpleContent>
         <extension base="token">
           <attribute name="type" type="token"
             use="required"/>
           <attribute name="due" type="dateTime"
             use="required"/>
         </extension>
       </simpleContent>
     </complexType>

     <complexType name="missingCodes">
       <sequence>
         <element name="code"
           type="verificationCode:missingVerificationCode"
           minOccurs="1" maxOccurs="unbounded"/>
       </sequence>
     </complexType>

     <complexType name="infoVerificationCodeType">
       <simpleContent>
         <extension base="token">
           <attribute name="type" type="token"
             use="required"/>
           <attribute name="date" type="dateTime"
             use="required"/>
         </extension>
       </simpleContent>
     </complexType>

     <complexType name="codesType">



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       <sequence>
         <element name="code"
           type="verificationCode:infoVerificationCodeType"
           minOccurs="1" maxOccurs="unbounded"/>
       </sequence>
     </complexType>

   </schema>
   END

5.  IANA Considerations

5.1.  XML Namespace

   This document uses URNs to describe XML namespaces and XML schemas
   conforming to a registry mechanism described in [RFC3688].

   Registration request for the verificationCode namespace:

      URI: ietf:params:xml:ns:verificationCode-1.0
      Registrant Contact: See the "Author's Address" section of this
      document.
      XML: None.  Namespace URIs do not represent an XML specification.

   Registration request for the verificationCode XML schema:

      URI: ietf:params:xml:ns:verificationCode-1.0
      Registrant Contact: See the "Author's Address" section of this
      document.
      XML: See the "Formal Syntax" section of this document.

5.2.  EPP Extension Registry

   The EPP extension described in this document should be registered by
   the IANA in the EPP Extension Registry described in [RFC7451].  The
   details of the registration are as follows:

   Name of Extension: "Verification Code 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




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   IPR Disclosure: None

   Status: Active

   Notes: None

6.  Security Considerations

   The mapping extension described in this document is based on the
   security services described by EPP [RFC5730] and protocol layers used
   by EPP.  The security considerations described in these other
   specifications apply to this specification as well.

   XML Signature [W3C.CR-xmldsig-core2-20120124] is used in this
   extension to verify that the Verification Code originated from a
   trusted Verification Service Provider (VSP) and that it wasn't
   tampered with in transit from the VSP to the client to the server.
   To support multiple VSP keys, the VSP certificate chain MUST be
   included in the <X509Certificate> elements of the Signed Code
   (Section 2.1.1) and MUST chain up and be verified by the server
   against a set of trusted certificates.

   It is RECOMMENDED that signed codes do not include white-spaces
   between the XML elements in order to mitigate risks of invalidating
   the digital signature when transferring of signed codes between
   applications takes place.

   Use of XML canonicalization SHOULD be used when generating the signed
   code.  SHA256/RSA-SHA256 SHOULD be used for digesting and signing.
   The size of the RSA key SHOULD be at least 2048 bits.

7.  Normative References

   [RFC2045]  Freed, N. and N. Borenstein, "Multipurpose Internet Mail
              Extensions (MIME) Part One: Format of Internet Message
              Bodies", RFC 2045, November 1996.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              January 2004.

   [RFC5234]  Crocker, D. and P. Overell, "Augmented BNF for Syntax
              Specifications: ABNF", STD 68, RFC 5234, January 2008.

   [RFC5730]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
              STD 69, RFC 5730, August 2009.



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   [RFC5731]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Domain Name Mapping", STD 69, RFC 5731, August 2009.

   [RFC5732]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Host Mapping", STD 69, RFC 5732, August 2009.

   [RFC5733]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Contact Mapping", STD 69, RFC 5733, August 2009.

   [RFC7451]  Hollenbeck, S., "Extension Registry for the Extensible
              Provisioning Protocol", RFC 7451, February 2015.

   [W3C.CR-xmldsig-core2-20120124]
              Cantor, S., Roessler, T., Eastlake, D., Yiu, K., Reagle,
              J., Solo, D., Datta, P., and F. Hirsch, "XML Signature
              Syntax and Processing Version 2.0", World Wide Web
              Consortium CR CR-xmldsig-core2-20120124, January 2012,
              <http://www.w3.org/TR/2012/CR-xmldsig-core2-20120124>.

Appendix A.  Acknowledgements

Appendix B.  Change History

B.1.  Change from 00 to 01

   1.  Fixed pendingComplaince and complaint to pendingCompliance and
       compliant in text.
   2.  Fixed verificaton to verification.

B.2.  Change from 01 to 02

   1.  Added support for the notApplicable status value.

B.3.  Change from 02 to 03

   1.  Added regular expression pattern for the format of the
       verification code token value in the XML schema.

Author's Address

   James Gould
   VeriSign, Inc.
   12061 Bluemont Way
   Reston, VA  20190
   US

   Email: jgould@verisign.com
   URI:   http://www.verisign.com



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