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    Network Working Group                                           J. Gould
    Internet-Draft                                            VeriSign, Inc.
    Intended status: Standards Track                        November 9, 2015
    Expires: May 12, 2016

      Verification Code Extension for the Extensible Provisioning Protocol
                                     (EPP)
                     draft-gould-eppext-verificationcode-02

    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 May 12, 2016.

    Copyright Notice

       Copyright (c) 2015 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 . . . . . . . . . . . . . . . . . . . . . .   3
         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
       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
       [W3C.CR-xmldsig-core2-20120124] and is "base64" encoded.  The

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       "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.

    2.  Object Attributes

       This extension adds additional elements to EPP object mappings like
       the EPP domain name mapping [RFC5731], EPP host mapping [RFC5732],

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

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       A <verificationCode:signedCode> element subsitutes 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 subsitution 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>
        jMu4PfyQGiJBF0GWSEPFCJjmywCEqR2h4LD+ge6XQ+JnmKFFCuCZS/3SLKAx0L1w
        QDFO2e0Y69k2G7/LGE37X3vOflobFM1oGwja8+GMVraoto5xAd4/AF7eHukgAymD
        o9toxoa2h0yV4A4PmXzsU6S86XtCcUE+S/WM72nyn47zoUCzzPKHZBRyeWehVFQ+

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        jYRMIAMzM57HHQA+6eaXefRvtPETgUO4aVIVSugc4OUAZZwbYcZrC6wOaQqqqAZi
        30aPOBYbAvHMSmWSS+hFkbshomJfHxb97TD2grlYNrQIzqXk7WbHWy2SYdA+sI/Z
        ipJsXNa6osTUw1CzA7jfwA==
          </SignatureValue>
          <KeyInfo>
           <X509Data>
           <X509Certificate>
        MIIESTCCAzGgAwIBAgIBAjANBgkqhkiG9w0BAQsFADBiMQswCQYDVQQGEwJVUzEL
        MAkGA1UECBMCQ0ExFDASBgNVBAcTC0xvcyBBbmdlbGVzMRMwEQYDVQQKEwpJQ0FO
        TiBUTUNIMRswGQYDVQQDExJJQ0FOTiBUTUNIIFRFU1QgQ0EwHhcNMTMwMjA4MDAw
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        MB8GA1UEAxMYVmFsaWRhdG9yIFRNQ0ggVEVTVCBDRVJUMIIBIjANBgkqhkiG9w0B
        AQEFAAOCAQ8AMIIBCgKCAQEAo/cwvXhbVYl0RDWWvoyeZpETVZVVcMCovUVNg/sw
        WinuMgEWgVQFrz0xA04pEhXCFVv4evbUpekJ5buqU1gmQyOsCKQlhOHTdPjvkC5u
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        5bOVnIos+HifrAtrIv4qEqwLL4FTZAUpaCa2BmgXfy2CSRQbxD5Or1gcSa3vurh5
        sPMCNxqaXmIXmQipS+DuEBqMM8tldaN7RYojUEKrGVsNk5i9y2/7sjn1zyyUPf7v
        L4GgDYqhJYWV61DnXgx/Jd6CWxvsnDF6scscQzUTEl+hywIDAQABo4H/MIH8MAwG
        A1UdEwEB/wQCMAAwHQYDVR0OBBYEFPZEcIQcD/Bj2IFz/LERuo2ADJviMIGMBgNV
        HSMEgYQwgYGAFO0/7kEh3FuEKS+Q/kYHaD/W6wihoWakZDBiMQswCQYDVQQGEwJV
        UzELMAkGA1UECBMCQ0ExFDASBgNVBAcTC0xvcyBBbmdlbGVzMRMwEQYDVQQKEwpJ
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        AQH/BAQDAgeAMC4GA1UdHwQnMCUwI6AhoB+GHWh0dHA6Ly9jcmwuaWNhbm4ub3Jn
        L3RtY2guY3JsMA0GCSqGSIb3DQEBCwUAA4IBAQB2qSy7ui+43cebKUKwWPrzz9y/
        IkrMeJGKjo40n+9uekaw3DJ5EqiOf/qZ4pjBD++oR6BJCb6NQuQKwnoAz5lE4Ssu
        y5+i93oT3HfyVc4gNMIoHm1PS19l7DBKrbwbzAea/0jKWVzrvmV7TBfjxD3AQo1R
        bU5dBr6IjbdLFlnO5x0G0mrG7x5OUPuurihyiURpFDpwH8KAH1wMcCpXGXFRtGKk
        wydgyVYAty7otkl/z3bZkCVT34gPvF70sR6+QxUy8u0LzF5A/beYaZpxSYG31amL
        AdXitTWFipaIGea9lEGFM0L9+Bg7XzNn4nVLXokyEB3bgS4scG6QznX23FGk
          </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:

       <verificationCode:code>  One or more <verificationCode:code> elements
           that is an encoded form of the digitally signed
           <verificationCode:signedCode> element, described in

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           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
       OnZlcmlmaWNhdGlvbkNvZGU9CiAgICAgICAgICAidXJuOmlldGY6cGFyYW1zOnht
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       aTkzb1QzSGZ5VmM0Z05NSW9IbTFQUzE5bDdEQktyYndiekFlYS8waktXVnpydm1W
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       aWh5aVVScEZEcHdIOEtBSDF3TWNDcFhHWEZSdEdLawogd3lkZ3lWWUF0eTdvdGts
       L3ozYlprQ1ZUMzRnUHZGNzBzUjYrUXhVeTh1MEx6RjVBL2JlWWFacHhTWUczMWFt
       TAogQWRYaXRUV0ZpcGFJR2VhOWxFR0ZNMEw5K0JnN1h6Tm40blZMWG9reUVCM2Jn
       UzRzY0c2UXpuWDIzRkdrCiAgIDwvWDUwOUNlcnRpZmljYXRlPgogICA8L1g1MDlE
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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>
           </create>
           <extension>
             <verificationCode:encodedSignedCode

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               xmlns:verificationCode=
                 "urn:ietf:params:xml:ns:verificationCode-1.0">
               <verificationCode:code>
       ICAgICAgPHZlcmlmaWNhdGlvbkNvZGU6c2lnbmVkQ29kZQogICAgICAgIHhtbG5z
       OnZlcmlmaWNhdGlvbkNvZGU9CiAgICAgICAgICAidXJuOmlldGY6cGFyYW1zOnht
       bDpuczp2ZXJpZmljYXRpb25Db2RlLTEuMCIKICAgICAgICAgIGlkPSJzaWduZWRD
       b2RlIj4KICAgCQk8dmVyaWZpY2F0aW9uQ29kZTpjb2RlPjEtYWJjMTIzPC92ZXJp
       ZmljYXRpb25Db2RlOmNvZGU+CiAgPFNpZ25hdHVyZSB4bWxucz0iaHR0cDovL3d3
       dy53My5vcmcvMjAwMC8wOS94bWxkc2lnIyI+CiAgIDxTaWduZWRJbmZvPgogICAg
       PENhbm9uaWNhbGl6YXRpb25NZXRob2QKIEFsZ29yaXRobT0iaHR0cDovL3d3dy53
       My5vcmcvMjAwMS8xMC94bWwtZXhjLWMxNG4jIi8+CiAgICA8U2lnbmF0dXJlTWV0
       aG9kCiBBbGdvcml0aG09Imh0dHA6Ly93d3cudzMub3JnLzIwMDEvMDQveG1sZHNp
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       aXRobT0iaHR0cDovL3d3dy53My5vcmcvMjAwMC8wOS94bWxkc2lnI2VudmVsb3Bl
       ZC1zaWduYXR1cmUiLz4KICAgICA8L1RyYW5zZm9ybXM+CiAgICAgPERpZ2VzdE1l
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       CiBqWVJNSUFNek01N0hIUUErNmVhWGVmUnZ0UEVUZ1VPNGFWSVZTdWdjNE9VQVpa
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       CiAgICA8WDUwOURhdGE+CiAgICA8WDUwOUNlcnRpZmljYXRlPgogTUlJRVNUQ0NB
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       NGV2YlVwZWtKNWJ1cVUxZ21ReU9zQ0tRbGhPSFRkUGp2a0M1dQogcERxYTUxRmxr
       MFRNYU1rSVFqczdhVUtDbUE0Ukc0dFRUR0svRWpSMWl4OC9EMGdIWVZSbGR5MVlQ
       ck1QK291NwogNWJPVm5Jb3MrSGlmckF0ckl2NHFFcXdMTDRGVFpBVXBhQ2EyQm1n
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       Z0RZcWhKWVdWNjFEblhneC9KZDZDV3h2c25ERjZzY3NjUXpVVEVsK2h5d0lEQVFB
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       SVFjRC9CajJJRnovTEVSdW8yQURKdmlNSUdNQmdOVgogSFNNRWdZUXdnWUdBRk8w
       LzdrRWgzRnVFS1MrUS9rWUhhRC9XNndpaG9XYWtaREJpTVFzd0NRWURWUVFHRXdK

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       VgogVXpFTE1Ba0dBMVVFQ0JNQ1EwRXhGREFTQmdOVkJBY1RDMHh2Y3lCQmJtZGxi
       R1Z6TVJNd0VRWURWUVFLRXdwSgogUTBGT1RpQlVUVU5JTVJzd0dRWURWUVFERXhK
       SlEwRk9UaUJVVFVOSUlGUkZVMVFnUTBHQ0FRRXdEZ1lEVlIwUAogQVFIL0JBUURB
       Z2VBTUM0R0ExVWRId1FuTUNVd0k2QWhvQitHSFdoMGRIQTZMeTlqY213dWFXTmhi
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       MnFTeTd1aSs0M2NlYktVS3dXUHJ6ejl5LwogSWtyTWVKR0tqbzQwbis5dWVrYXcz
       REo1RXFpT2YvcVo0cGpCRCsrb1I2QkpDYjZOUXVRS3dub0F6NWxFNFNzdQogeTUr
       aTkzb1QzSGZ5VmM0Z05NSW9IbTFQUzE5bDdEQktyYndiekFlYS8waktXVnpydm1W
       N1RCZmp4RDNBUW8xUgogYlU1ZEJyNklqYmRMRmxuTzV4MEcwbXJHN3g1T1VQdXVy
       aWh5aVVScEZEcHdIOEtBSDF3TWNDcFhHWEZSdEdLawogd3lkZ3lWWUF0eTdvdGts
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       YXRhPgogICA8L0tleUluZm8+CiAgPC9TaWduYXR1cmU+CgkJPC92ZXJpZmljYXRp
       b25Db2RlOnNpZ25lZENvZGU+Cg==
               </verificationCode:code>
               <verificationCode:code>
       PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48dmVyaWZpY2F0
       aW9uQ29kZTpzaWduZWRDb2RlIHhtbG5zOnZlcmlmaWNhdGlvbkNvZGU9InVybjpp
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       ZWRDb2RlIiB0eXBlPSJyZWdpc3RyYW50Ij48dmVyaWZpY2F0aW9uQ29kZTpjb2Rl
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       IHhtbG5zOmRzaWc9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvMDkveG1sZHNpZyMi
       Pjxkc2lnOlNpZ25lZEluZm8+PGRzaWc6Q2Fub25pY2FsaXphdGlvbk1ldGhvZCBB
       bGdvcml0aG09Imh0dHA6Ly93d3cudzMub3JnL1RSLzIwMDEvUkVDLXhtbC1jMTRu
       LTIwMDEwMzE1I1dpdGhDb21tZW50cyIvPjxkc2lnOlNpZ25hdHVyZU1ldGhvZCBB
       bGdvcml0aG09Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvMDkveG1sZHNpZyNyc2Et
       c2hhMSIvPjxkc2lnOlJlZmVyZW5jZSBVUkk9IiNzaWduZWRDb2RlIj48ZHNpZzpU
       cmFuc2Zvcm1zPjxkc2lnOlRyYW5zZm9ybSBBbGdvcml0aG09Imh0dHA6Ly93d3cu
       dzMub3JnLzIwMDAvMDkveG1sZHNpZyNlbnZlbG9wZWQtc2lnbmF0dXJlIi8+PC9k
       c2lnOlRyYW5zZm9ybXM+PGRzaWc6RGlnZXN0TWV0aG9kIEFsZ29yaXRobT0iaHR0
       cDovL3d3dy53My5vcmcvMjAwMS8wNC94bWxlbmMjc2hhMjU2Ii8+PGRzaWc6RGln
       ZXN0VmFsdWU+SFg2TU1WUWdnSStzNG9tT3haYjBGTW1VSlBRdk15WmUybDVEdEhh
       QlZMND08L2RzaWc6RGlnZXN0VmFsdWU+PC9kc2lnOlJlZmVyZW5jZT48L2RzaWc6
       U2lnbmVkSW5mbz48ZHNpZzpTaWduYXR1cmVWYWx1ZT5VOUhPNVlYVWE0ZUsyYXRz
       U1RuQk1DU3dXM0dWUzZnUEtkaDBZTlZicERud1d4b1BtYlR2YkVsNDE4NFlKZ3Uw
       WXB3RkROMmZLY3JVCk1YV0hncE56K0oycTh6MWpTcVJMUEw0UmpnRWw0eGhiOXl5
       cExOZC8xQXJXRVlhWWZEdUc1S3FYV05MRG5YVzJoQkEzK0R5Wk82MFQKcTVPd0R5
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       UEhkUlJVdjdzQzRmM0NnWmFaSWFXNQp2RmJnTmJodFJVa0hsSVhnYVNGWDgvcFdV
       RXFIY0dLTUxnRU1nbHBnQ3RtOFlIcXVqb0tXUk0yUDNiK2h3ZTRsU0hSWVRjK0pB
       eEluClU4RDc1WnliWThnSWFuZUprS2dwVTk2T0tJTGQ5L0l0UVhaeHZnPT08L2Rz
       aWc6U2lnbmF0dXJlVmFsdWU+PGRzaWc6S2V5SW5mbz48ZHNpZzpYNTA5RGF0YT48
       ZHNpZzpYNTA5Q2VydGlmaWNhdGU+TUlJRGlUQ0NBbkdnQXdJQkFnSUVmcXE2SFRB
       TkJna3Foa2lHOXcwQkFRc0ZBREIxTVJBd0RnWURWUVFHRXdkVmJtdHViM2R1TVJB
       dwpEZ1lEVlFRSUV3ZFZibXR1YjNkdU1SQXdEZ1lEVlFRSEV3ZFZibXR1YjNkdU1S
       QXdEZ1lEVlFRS0V3ZFZibXR1YjNkdU1SQXdEZ1lEClZRUUxFd2RWYm10dWIzZHVN
       Umt3RndZRFZRUURFeEIyWlhKcFptbGpZWFJwYjI1RGIyUmxNQjRYRFRFMU1EWXhO

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       VEl4TURBeU1sb1gKRFRNMU1EWXhNREl4TURBeU1sb3dkVEVRTUE0R0ExVUVCaE1I
       Vlc1cmJtOTNiakVRTUE0R0ExVUVDQk1IVlc1cmJtOTNiakVRTUE0RwpBMVVFQnhN
       SFZXNXJibTkzYmpFUU1BNEdBMVVFQ2hNSFZXNXJibTkzYmpFUU1BNEdBMVVFQ3hN
       SFZXNXJibTkzYmpFWk1CY0dBMVVFCkF4TVFkbVZ5YVdacFkyRjBhVzl1UTI5a1pU
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       cmsKUWFJL2lHUEZ3WmVITjFnRFVhcTltVnJmQis2eWR5Qmdoc2FHVFZoaERIOFNO
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       VDc1L2J0SDZ1YytmClJOdE5FcmhJdVlJUmN0WTZIRmRaR3BlS3cxYnlYK0RsNkJP
       L3ZLdnQ4NDllY1R3aEZIcDUwWGh2NFVTL0Z5aWVLaGs3dDdHRnJGRlQKL2NCTGsy
       WmxFa1lLcFlEU2dlc2lseFg2QkpTZVdCbXZLQzlTL2pBZDhNWmRHVUg2aHNHRXBl
       U1BmZkZQV3FWcXl6V0p5bG91OXF4ZQpnUTZjOFo2SVpXZkUzakxSOUVySDhzOTFD
       Mm1pTFZrQ0F3RUFBYU1oTUI4d0hRWURWUjBPQkJZRUZIY0JLdk03dmk3dUZNTUx5
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       NDJXTVVUSlUyVFlWVldtdUs2NFkwQXFrN2FldzkvVzIzZEcrT2xhOW9VYnBrSXJr
       dDRDN3hRa0d5SXN2eUo3bi91OFhBRDIKbno1T1cvek5GWnlrZDAzT2N3M240NkZx
       c1IwVDlBbFBEWHQxUjlmMjZMd1lxdjk3dWtVNEcrMVRJNHorV0F2TCtVRk9FVnNu
       PC9kc2lnOlg1MDlDZXJ0aWZpY2F0ZT48L2RzaWc6WDUwOURhdGE+PC9kc2lnOktl
       eUluZm8+PC9kc2lnOlNpZ25hdHVyZT48L3ZlcmlmaWNhdGlvbkNvZGU6c2lnbmVk
       Q29kZT4=
               </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
       server.  If no verification profile is assigned to the client, no
       additional verification is required by the client.

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    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:SHhiOTdURDJncmxZTnJRSXpxWGs3V2JIV3kyU1lkQStzSS9aCiBpcEpzWE5hNm9z
       C:VFV3MUN6QTdqZndBPT0KICAgPC9TaWduYXR1cmVWYWx1ZT4KICAgPEtleUluZm8+
       C:CiAgICA8WDUwOURhdGE+CiAgICA8WDUwOUNlcnRpZmljYXRlPgogTUlJRVNUQ0NB
       C:ekdnQXdJQkFnSUJBakFOQmdrcWhraUc5dzBCQVFzRkFEQmlNUXN3Q1FZRFZRUUdF
       C:d0pWVXpFTAogTUFrR0ExVUVDQk1DUTBFeEZEQVNCZ05WQkFjVEMweHZjeUJCYm1k
       C:bGJHVnpNUk13RVFZRFZRUUtFd3BKUTBGTwogVGlCVVRVTklNUnN3R1FZRFZRUURF
       C:eEpKUTBGT1RpQlVUVU5JSUZSRlUxUWdRMEV3SGhjTk1UTXdNakE0TURBdwogTURB
       C:d1doY05NVGd3TWpBM01qTTFPVFU1V2pCc01Rc3dDUVlEVlFRR0V3SlZVekVMTUFr

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       C:R0ExVUVDQk1DUTBFeAogRkRBU0JnTlZCQWNUQzB4dmN5QkJibWRsYkdWek1SY3dG
       C:UVlEVlFRS0V3NVdZV3hwWkdGMGIzSWdWRTFEU0RFaAogTUI4R0ExVUVBeE1ZVm1G
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       C:SlEwRk9UaUJVVFVOSUlGUkZVMVFnUTBHQ0FRRXdEZ1lEVlIwUAogQVFIL0JBUURB
       C:Z2VBTUM0R0ExVWRId1FuTUNVd0k2QWhvQitHSFdoMGRIQTZMeTlqY213dWFXTmhi
       C:bTR1YjNKbgogTDNSdFkyZ3VZM0pzTUEwR0NTcUdTSWIzRFFFQkN3VUFBNElCQVFC
       C:MnFTeTd1aSs0M2NlYktVS3dXUHJ6ejl5LwogSWtyTWVKR0tqbzQwbis5dWVrYXcz
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       C:L3ozYlprQ1ZUMzRnUHZGNzBzUjYrUXhVeTh1MEx6RjVBL2JlWWFacHhTWUczMWFt
       C:TAogQWRYaXRUV0ZpcGFJR2VhOWxFR0ZNMEw5K0JnN1h6Tm40blZMWG9reUVCM2Jn
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       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>

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

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

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

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

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         </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="verificationCode:verificationCodeType">
               <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="verificationCode:verificationCodeType">
               <attribute name="date" type="dateTime"
                 use="required"/>
             </extension>
           </simpleContent>
         </complexType>

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

       </schema>
       END

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    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

       IPR Disclosure: None

       Status: Active

       Notes: None

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    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.

       [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.

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       [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.

    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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