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Versions: (draft-gould-regext-login-security) 00 01

    Network Working Group                                           J. Gould
    Internet-Draft                                                  M. Pozun
    Intended status: Standards Track                          VeriSign, Inc.
    Expires: October 11, 2019                                  April 9, 2019

    Login Security Extension for the Extensible Provisioning Protocol (EPP)
                      draft-ietf-regext-login-security-01

    Abstract

       The Extensible Provisioning Protocol (EPP) includes a client
       authentication scheme that is based on a user identifier and
       password.  The structure of the password field is defined by an XML
       Schema data type that specifies minimum and maximum password length
       values, but there are no other provisions for password management
       other than changing the password.  This document describes an EPP
       extension that allows longer passwords to be created and adds
       additional security features to the EPP login command and response.

    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 October 11, 2019.

    Copyright Notice

       Copyright (c) 2019 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
       to this document.  Code Components extracted from this document must

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       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.  Migrating to Newer Versions of This Extension . . . . . . . .   3
       3.  Object Attributes . . . . . . . . . . . . . . . . . . . . . .   4
         3.1.  Event . . . . . . . . . . . . . . . . . . . . . . . . . .   4
         3.2.  "[LOGIN-SECURITY]" Password . . . . . . . . . . . . . . .   5
         3.3.  Dates and Times . . . . . . . . . . . . . . . . . . . . .   6
       4.  EPP Command Mapping . . . . . . . . . . . . . . . . . . . . .   6
         4.1.  EPP <login> Command . . . . . . . . . . . . . . . . . . .   6
       5.  Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . .  14
         5.1.  Login Security Extension Schema . . . . . . . . . . . . .  14
       6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
         6.1.  XML Namespace . . . . . . . . . . . . . . . . . . . . . .  16
         6.2.  EPP Extension Registry  . . . . . . . . . . . . . . . . .  17
       7.  Implementation Status . . . . . . . . . . . . . . . . . . . .  17
       8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
       9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  18
       10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
         10.1.  Normative References . . . . . . . . . . . . . . . . . .  18
         10.2.  Informative References . . . . . . . . . . . . . . . . .  18
         10.3.  URIs . . . . . . . . . . . . . . . . . . . . . . . . . .  19
       Appendix A.  Change History . . . . . . . . . . . . . . . . . . .  19
         A.1.  Change from 00 to 01  . . . . . . . . . . . . . . . . . .  19
         A.2.  Change from 01 to 02  . . . . . . . . . . . . . . . . . .  19
         A.3.  Change from 02 to 03  . . . . . . . . . . . . . . . . . .  19
         A.4.  Change from 03 to REGEXT 00 . . . . . . . . . . . . . . .  19
         A.5.  Change from REGEXT 00 to REGEXT 01  . . . . . . . . . . .  19
       Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  20

    1.  Introduction

       This document describes an Extensible Provisioning Protocol (EPP)
       extension for enhancing the security of the EPP login command in EPP
       RFC 5730.  The enhancements include supporting longer passwords (or
       passphrases) than the 16-character maximum and providing a list of
       security events in the login response.  The password (current and
       new) in EPP RFC 5730 can be overridden by the password included in
       the extension to extend past the 16-character maximum.  The security
       events supported include: password expiry, client certificate expiry,
       insecure cipher, insecure TLS protocol, new pasword complexity, login
       security statistical warning, and a custom event.  The attributes
       supported by the security events include identifying the event type

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       or sub-type, indicating the security level of warning or error, a
       future or past-due expiration date, the value that resulted in the
       event, the duration of the statistical event, and a free-form
       description with an optional language.

    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.

       "loginSec-0.4" is used as an abbreviation for
       "urn:ietf:params:xml:ns:epp:loginSec-0.4".  The XML namespace prefix
       "loginSec" 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.  Migrating to Newer Versions of This Extension

       (Note to RFC Editor: remove this section before publication as an
       RFC.)

       Servers which implement this extension SHOULD provide a way for
       clients to progressively update their implementations when a new
       version of the extension is deployed.

       Servers SHOULD (for a temporary migration period) provide support for
       older versions of the extension in parallel to the newest version,
       and allow clients to select their preferred version via the
       <svcExtension> element of the <login> command.

       If a client requests multiple versions of the extension at login,
       then, when preparing responses to commands which do not include
       extension elements, the server SHOULD only include extension elements
       in the namespace of the newest version of the extension requested by
       the client.

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       When preparing responses to commands which do include extension
       elements, the server SHOULD only include extension elements for the
       extension versions present in the command.

    3.  Object Attributes

       This extension adds additional elements to [RFC5730] login command
       and response.  Only those new elements are described here.

    3.1.  Event

       A security event, using the <loginSec:event> element, represents
       either a warning or error identified by the server after the client
       has connected and submitted the login command.  There MAY be multiple
       events returned that provides information for the client to address.
       The <loginSec:event> MAY include a free form description.  All of the
       security events use a consistent set of attributes, where the exact
       set of applicable attributes is based on the event type.  The
       supported set of <loginSec:event> element attributes include:

       "type":  A REQUIRED attribute that defines the type of security
           event.  The enumerated list of "type" values include:

           "password":  Identifies a password expiry event, where the
               password expires in the future or has expired based on the
               "exDate" date and time.
           "certificate":  Identifies a client certificate expiry event,
               where the client certificate will expire at the "exDate" date
               and time.
           "cipher":  Identifies the use of an insecure or deprecated TLS
               cipher suite.
           "tlsProtocol":  Identifies the use of an insecure or deprecated
               TLS protocol.
           "newPW":  The new password does not meet the server password
               complexity requirements.
           "stat":  Provides a login security statistical warning that MUST
               set the "name" of the statistic.
           "custom":  Custom event type that MUST set the "name" attribute
               with the custom event type name.
       "name":  Used to define a sub-type or the type name when the "type"
           attribute is "custom".
       "level":  Defines the level of the event as either "warning" for a
           warning event that needs action, or "error" for an error event
           that requires immediate action.
       "exDate":  Contains the date and time that a "warning" level has or
           will become an "error" level.  At expiry there MAY be an error to
           connect or MAY be an error to login.  An example is an expired

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           certificate that will result in a error to connect or an expired
           password that may result in a failed login.
       "value":  Identifies the value that resulted in the login security
           event.  An example is the negotiated insecure cipher suite or the
           negotiated insecure TLS protocol.
       "duration":  Defines the duration that a statistical event is
           associated with.
       "lang":  Identifies the language of the free form description if the
           negotiated language is something other than the default value of
           "en" (English).

       Example login security event for a password expiring in a week:

       <loginSec:event
         type="password"
         level="warning"
         exDate="2018-04-01T22:00:00.0Z"
         lang="en">
         Password expiration soon
       </loginSec:event>

       Example login security event for identifying 100 failed logins over
       the last day, using the "stat" sub-type of "failedLogins":

       <loginSec:event
         type="stat"
         name="failedLogins"
         level="warning"
         value="100"
         duration="P1D">
         Excessive invalid daily logins
       </loginSec:event>

    3.2.  "[LOGIN-SECURITY]" Password

       The <loginSec:pw> element MUST override the [RFC5730] <pw> element
       only if the <pw> contains the predefined value of "[LOGIN-SECURITY]",
       which is a constant value for the server to use the <loginSec:pw>
       element for the password.  Similarly, the <loginSec:newPW> element
       MUST override the [RFC5730] <newPW> element only if the <newPW>
       contains the predefined value of "[LOGIN-SECURITY]", which is a
       constant value for the server to use the <loginSec:newPW> element for
       the new password.  The "[LOGIN-SECURITY]" pre-defined string MUST be
       supported by the server for the client to explicitly indicate to the
       server whether to use <loginSec:pw> element in place of the [RFC5730]
       <pw> element or to use the <loginSec:newPW> in place of the [RFC5730]
       <newPW> element.

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    3.3.  Dates and Times

       Date and time attribute values MUST be represented in Universal
       Coordinated Time (UTC) using the Gregorian calendar.  The extended
       date-time form using upper case "T" and "Z" characters defined in
       [W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
       values, as XML Schema does not support truncated date-time forms or
       lower case "T" and "Z" characters.

    4.  EPP Command Mapping

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

    4.1.  EPP <login> Command

       This extension defines additional elements to extend the EPP <login>
       command and response to be used in conjunction with [RFC5730].

       The EPP <login> command is used to establish a session with an EPP
       server.  This extension overrides the password that is passed with
       the [RFC5730] <pw> or the <newPW> element as defined in Section 3.2.
       A <loginSec:loginSec> element is sent along with the [RFC5730]
       <login> command and MUST contain at least one of the following child
       elements:

       <loginSec:userAgent>:  OPTIONAL client user agent that identifies the
           client software, language, and operating system used by the
           server to identify functional or security constraints, current
           security issues, and potential future functional or security
           issues for the client.  The <loginSec:userAgent> element contains
           the following child elements:

           <loginSec:app>:  OPTIONAL name of the client application software
               with version if available, such as the name of the client SDK
               "EPP SDK 1.0.0".
           <loginSec:tech>:  OPTIONAL technology used for the client
               software with version if available, such as "Java 11.0.2".
           <loginSec:os>:  OPTIONAL client operating system used with
               version if available, such as "x86_64 Mac OS X 10.11.6".
       <loginSec:pw>:  OPTIONAL plain text password that is case sensitive,
           has a minimum length of 6 characters, and has a maximum length
           that is up to server policy.  All leading and trailing whitespace
           is removed, and all internal contiguous whitespace that includes
           #x9 (tab), #xA (linefeed), #xD (carriage return), and #x20
           (space) is replaced with a single #x20 (space).  This element

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           MUST only be used if the [RFC5730] <pw> element is set to the
           "[LOGIN-SECURITY]" value.
       <loginSec:newPW>:  OPTIONAL plain text new password that is case
           sensitive, has a minimum length of 6 characters, and has a
           maximum length that is up to server policy.  All leading and
           trailing whitespace is removed, and all internal contiguous
           whitespace that includes #x9 (tab), #xA (linefeed), #xD (carriage
           return), and #x20 (space) is replaced with a single #x20 (space).
           This element MUST only be used if the [RFC5730] <newPW> element
           is set to the "[LOGIN-SECURITY]" value.

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       Example login command that uses the <loginSec:pw> element instead of
       the [RFC5730] <pw> element to establish the session and includes the
       <loginSec:userAgent> element:

       C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
       C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
       C:  <command>
       C:    <login>
       C:      <clID>ClientX</clID>
       C:      <pw>[LOGIN-SECURITY]</pw>
       C:      <options>
       C:        <version>1.0</version>
       C:        <lang>en</lang>
       C:      </options>
       C:      <svcs>
       C:        <objURI>urn:ietf:params:xml:ns:obj1</objURI>
       C:        <objURI>urn:ietf:params:xml:ns:obj2</objURI>
       C:        <objURI>urn:ietf:params:xml:ns:obj3</objURI>
       C:        <svcExtension>
       C:          <extURI>urn:ietf:params:xml:ns:epp:loginSec-0.4</extURI>
       C:        </svcExtension>
       C:      </svcs>
       C:    </login>
       C:    <extension>
       C:      <loginSec:loginSec
       C:        xmlns:loginSec=
       C:          "urn:ietf:params:xml:ns:epp:loginSec-0.4">
       C:        <loginSec:userAgent>
       C:          <loginSec:app>EPP SDK 1.0.0</loginSec:app>
       C:          <loginSec:tech>Java 11.0.2</loginSec:tech>
       C:          <loginSec:os>x86_64 Mac OS X 10.11.6</loginSec:os>
       C:        </loginSec:userAgent>
       C:        <loginSec:pw>this is a long password</loginSec:pw>
       C:      </loginSec:loginSec>
       C:    </extension>
       C:    <clTRID>ABC-12345</clTRID>
       C:  </command>
       C:</epp>

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       Example login command that uses the <loginSec:pw> element instead of
       the [RFC5730] <pw> element to establish the session, and uses the
       <loginSec:newPW> element instead of the [RFC5730] <newPW> element to
       set the new password:

       C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
       C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
       C:  <command>
       C:    <login>
       C:      <clID>ClientX</clID>
       C:      <pw>[LOGIN-SECURITY]</pw>
       C:      <newPW>[LOGIN-SECURITY]</newPW>
       C:      <options>
       C:        <version>1.0</version>
       C:        <lang>en</lang>
       C:      </options>
       C:      <svcs>
       C:        <objURI>urn:ietf:params:xml:ns:obj1</objURI>
       C:        <objURI>urn:ietf:params:xml:ns:obj2</objURI>
       C:        <objURI>urn:ietf:params:xml:ns:obj3</objURI>
       C:        <svcExtension>
       C:          <extURI>urn:ietf:params:xml:ns:epp:loginSec-0.4</extURI>
       C:        </svcExtension>
       C:      </svcs>
       C:    </login>
       C:    <extension>
       C:      <loginSec:loginSec
       C:        xmlns:loginSec=
       C:          "urn:ietf:params:xml:ns:epp:loginSec-0.4">
       C:        <loginSec:pw>this is a long password
       C:        </loginSec:pw>
       C:        <loginSec:newPW>new password that is still long
       C:        </loginSec:newPW>
       C:      </loginSec:loginSec>
       C:    </extension>
       C:    <clTRID>ABC-12345</clTRID>
       C:  </command>
       C:</epp>

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       Example login command that uses the [RFC5730] <pw> element to
       establish the session, and uses the <loginSec:newPW> element instead
       of the [RFC5730] <newPW> element to set the new password:

       C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
       C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
       C:  <command>
       C:    <login>
       C:      <clID>ClientX</clID>
       C:      <pw>shortpassword</pw>
       C:      <newPW>[LOGIN-SECURITY]</newPW>
       C:      <options>
       C:        <version>1.0</version>
       C:        <lang>en</lang>
       C:      </options>
       C:      <svcs>
       C:        <objURI>urn:ietf:params:xml:ns:obj1</objURI>
       C:        <objURI>urn:ietf:params:xml:ns:obj2</objURI>
       C:        <objURI>urn:ietf:params:xml:ns:obj3</objURI>
       C:        <svcExtension>
       C:          <extURI>urn:ietf:params:xml:ns:epp:loginSec-0.4</extURI>
       C:        </svcExtension>
       C:      </svcs>
       C:    </login>
       C:    <extension>
       C:      <loginSec:loginSec
       C:        xmlns:loginSec=
       C:          "urn:ietf:params:xml:ns:epp:loginSec-0.4">
       C:        <loginSec:newPW>new password that is still long
       C:        </loginSec:newPW>
       C:      </loginSec:loginSec>
       C:    </extension>
       C:    <clTRID>ABC-12345</clTRID>
       C:  </command>
       C:</epp>

       Upon a completed login command (success or failed), the extension
       MUST be included in the response based on the following conditions:

       Client supports extension:  client supports the extension based on
           the <svcExtension> element of the <login> command.
       At least one login security event:  The server has identified at
           least one login security event to communicate to the client.

       The extension to the EPP response uses the <loginSec:loginSecData>
       element that contains the following child elements:

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       <loginSec:event>:  One or more <loginSec:event> elements defined in
           Section 3.1.

       Example EPP response to a successful login command where the password
       will expire in a week:

       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:    <extension>
       S:      <loginSec:loginSecData
       S:        xmlns:loginSec=
       S:          "urn:ietf:params:xml:ns:epp:loginSec-0.4">
       S:        <loginSec:event
       S:          type="password"
       S:          level="warning"
       S:          exDate="2018-04-01T22:00:00.0Z"
       S:          lang="en">
       S:          Password expiring in a week
       S:        </loginSec:event>
       S:      </loginSec:loginSecData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:  </response>
       S:</epp>

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       Example EPP response to a failed login command where the password has
       expired and the new password does not meet the server complexity
       requirements:

       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="2200">
       S:      <msg>Authentication error</msg>
       S:    </result>
       S:    <extension>
       S:      <loginSec:loginSecData
       S:        xmlns:loginSec=
       S:          "urn:ietf:params:xml:ns:epp:loginSec-0.4">
       S:        <loginSec:event
       S:          type="password"
       S:          level="error"
       S:          exDate="2018-03-26T22:00:00.0Z">
       S:          Password has expired
       S:        </loginSec:event>
       S:        <loginSec:event
       S:          type="newPW"
       S:          level="error">
       S:          New password does not meet complexity requirements
       S:        </loginSec:event>
       S:      </loginSec:loginSecData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:  </response>
       S:</epp>

       Example EPP response to a successful login command where there is a
       set of login security events:

       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:    <extension>
       S:      <loginSec:loginSecData
       S:        xmlns:loginSec=
       S:          "urn:ietf:params:xml:ns:epp:loginSec-0.4">
       S:        <loginSec:event

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       S:          type="password"
       S:          level="warning"
       S:          exDate="2018-04-01T22:00:00.0Z"
       S:          lang="en">
       S:          Password expiration soon
       S:        </loginSec:event>
       S:        <loginSec:event
       S:          type="certificate"
       S:          level="warning"
       S:          exDate="2018-04-02T22:00:00.0Z"/>
       S:        <loginSec:event
       S:          type="cipher"
       S:          level="warning"
       S:          value="TLS_RSA_WITH_AES_128_CBC_SHA">
       S:          Non-PFS Cipher negotiated
       S:        </loginSec:event>
       S:        <loginSec:event
       S:          type="tlsProtocol"
       S:          level="warning"
       S:          value="TLSv1.0">
       S:          Insecure TLS protocol negotiated
       S:        </loginSec:event>
       S:        <loginSec:event
       S:          type="stat"
       S:          name="failedLogins"
       S:          level="warning"
       S:          value="100"
       S:          duration="P1D">
       S:          Excessive invalid daily logins
       S:        </loginSec:event>
       S:        <loginSec:event
       S:          type="custom"
       S:          name="myCustomEvent"
       S:          level="warning">
       S:          A custom login security event occured
       S:        </loginSec:event>
       S:      </loginSec:loginSecData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:  </response>
       S:</epp>

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    5.  Formal Syntax

       One schema is presented here that is the EPP Login Security 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.

    5.1.  Login Security Extension Schema

       BEGIN
       <?xml version="1.0" encoding="UTF-8"?>
       <schema xmlns="http://www.w3.org/2001/XMLSchema"
         xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
         xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
         xmlns:loginSec="urn:ietf:params:xml:ns:epp:loginSec-0.4"
         targetNamespace="urn:ietf:params:xml:ns:epp:loginSec-0.4"
         elementFormDefault="qualified">

         <!--
         Import common element types.
         -->
         <import namespace="urn:ietf:params:xml:ns:eppcom-1.0" />
         <import namespace="urn:ietf:params:xml:ns:epp-1.0" />

         <annotation>
           <documentation>Extensible Provisioning Protocol v1.0
              Login Security Extension Schema.</documentation>
         </annotation>

         <!-- Login command extension elements -->
         <element name="loginSec" type="loginSec:loginSecType" />

         <!--
           Attributes associated with the login command extension.
          -->
         <complexType name="loginSecType">
           <sequence>
             <element name="userAgent"
               type="loginSec:userAgentType" minOccurs="0" />
             <element name="pw"
               type="loginSec:pwType" minOccurs="0" />
             <element name="newPW"
               type="loginSec:pwType" minOccurs="0" />
           </sequence>

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         </complexType>

         <simpleType name="pwType">
           <restriction base="token">
             <minLength value="6" />
           </restriction>
         </simpleType>

         <complexType name="userAgentType">
           <sequence>
             <element name="app"
               type="token" minOccurs="0" />
             <element name="tech"
               type="token" minOccurs="0" />
             <element name="os"
               type="token" minOccurs="0" />
           </sequence>
         </complexType>

         <!-- Login response extension elements -->
         <element name="loginSecData"
           type="loginSec:loginSecDataType" />
         <complexType name="loginSecDataType">
           <sequence>
             <element name="event"
               type="loginSec:eventType"
               minOccurs="1" maxOccurs="unbounded" />
           </sequence>
         </complexType>

         <!-- Security event element -->
         <complexType name="eventType">
           <simpleContent>
             <extension base="normalizedString">
               <attribute name="type"
                 type="loginSec:typeEnum" use="required" />
               <attribute name="name"
                 type="token" />
               <attribute name="level"
                 type="loginSec:levelEnum" use="required" />
               <attribute name="exDate"
                 type="dateTime" />
               <attribute name="value"
                 type="token" />
               <attribute name="duration"
                 type="duration" />
               <attribute name="lang"
                 type="language" default="en" />

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             </extension>
           </simpleContent>
         </complexType>

         <!--
           Enumerated list of event types, with extensibility via "custom".
           -->
         <simpleType name="typeEnum">
           <restriction base="token">
             <enumeration value="password" />
             <enumeration value="certificate" />
             <enumeration value="cipher" />
             <enumeration value="tlsProtocol" />
             <enumeration value="newPW" />
             <enumeration value="stat" />
             <enumeration value="custom" />
           </restriction>
         </simpleType>

         <!--
           Enumerated list of levels.
           -->
         <simpleType name="levelEnum">
           <restriction base="token">
             <enumeration value="warning" />
             <enumeration value="error" />
           </restriction>
         </simpleType>
        <!--
        End of schema.
        -->
       </schema>
       END

    6.  IANA Considerations

    6.1.  XML Namespace

       This document uses URNs to describe XML namespaces and XML schemas
       conforming to a registry mechanism described in [RFC3688].  The
       following URI assignment is requested of IANA:

       Registration request for the loginSec namespace:

          URI: urn:ietf:params:xml:ns:epp:loginSec-0.4
          Registrant Contact: IESG
          XML: None.  Namespace URIs do not represent an XML specification.

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       Registration request for the loginSec XML schema:

          URI: urn:ietf:params:xml:schema:epp:loginSec-0.4
          Registrant Contact: IESG
          XML: See the "Formal Syntax" section of this document.

    6.2.  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: "Login Security 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

    7.  Implementation Status

       Note to RFC Editor: Please remove this section and the reference to
       RFC 7942 [RFC7942] before publication.

       TBD

    8.  Security Considerations

       The extension leaves the password (<pw> element) and new password
       (<newPW> element) minimum length beyond 6 characters and the maximum
       length up to sever policy.  The server SHOULD enforce minimum and
       maximum length requirements that are appropriate for their operating
       environment.  One example of a guideline for password length policies
       can be found in section 5 of NIST Special Publication 800-63B [1].

       The client SHOULD NOT decrease the security of a new password by
       decreasing the length of the current password.  For example, a client
       with a 20 character password set using the extension, should not use

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       the login command in [RFC5730] without using the extension, to set a
       new password that is less than or equal to 16 characters.

       The extension provides an extensible list of login security events to
       inform clients of connection and login warnings and errors.

    9.  Acknowledgements

       The authors wish to thank the following persons for their feedback
       and suggestions:

       o  Martin Casanova
       o  Scott Hollenbeck
       o  Patrick Mevzek

    10.  References

    10.1.  Normative References

       [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
                  Requirement Levels", BCP 14, RFC 2119,
                  DOI 10.17487/RFC2119, March 1997, <https://www.rfc-
                  editor.org/info/rfc2119>.

       [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
                  DOI 10.17487/RFC3688, January 2004, <https://www.rfc-
                  editor.org/info/rfc3688>.

       [RFC5730]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
                  STD 69, RFC 5730, DOI 10.17487/RFC5730, August 2009,
                  <https://www.rfc-editor.org/info/rfc5730>.

       [RFC7942]  Sheffer, Y. and A. Farrel, "Improving Awareness of Running
                  Code: The Implementation Status Section", BCP 205,
                  RFC 7942, DOI 10.17487/RFC7942, July 2016,
                  <https://www.rfc-editor.org/info/rfc7942>.

       [W3C.REC-xmlschema-2-20041028]
                  Biron, P. and A. Malhotra, "XML Schema Part 2: Datatypes
                  Second Edition", World Wide Web Consortium Recommendation
                  REC-xmlschema-2-20041028, October 2004,
                  <http://www.w3.org/TR/2004/REC-xmlschema-2-20041028>.

    10.2.  Informative References

       [RFC7451]  Hollenbeck, S., "Extension Registry for the Extensible
                  Provisioning Protocol", RFC 7451, DOI 10.17487/RFC7451,
                  February 2015, <https://www.rfc-editor.org/info/rfc7451>.

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    10.3.  URIs

       [1] https://pages.nist.gov/800-63-3/sp800-63b.html

    Appendix A.  Change History

    A.1.  Change from 00 to 01

       1.  Based on the feedback from Patrick Mevzek and a proposal from
           Scott Hollenbeck, changed the minimum length of the password from
           8 to 6, revised the description of the password, and added text
           in the Security Considerations section for the server password
           length policy.

    A.2.  Change from 01 to 02

       1.  Changed the XML namespace from urn:ietf:params:xml:ns:loginSec-
           0.3 to urn:ietf:params:xml:ns:epp:loginSec-0.3, and changed the
           XML schema registration from urn:ietf:params:xml:ns:loginSec-0.3
           to urn:ietf:params:xml:schema:epp:loginSec-0.3 based on a request
           from IANA with draft-ietf-regext-allocation-token.

    A.3.  Change from 02 to 03

       Updates based on the review by Patrick Mevzek, that include:

       1.  Fix the inconsistent case for newPW, that required a global
           change in the draft text and an update to the XML schema to
           "urn:ietf:params:xml:ns:loginSec-0.3".
       2.  Changed "contains the following child elements" to "MUST contain
           at least one of the following child elements", section "EPP
           <login> Command" to ensure that an empty <loginSec:loginSec>
           element is not passed.
       3.  Add "The client SHOULD NOT decrease the security of a new
           password by decreasing the length of the current password." along
           with an example to the "Security Considerations" section.

    A.4.  Change from 03 to REGEXT 00

       Changed to regext working group draft by changing draft-gould-regext-
       login-security to draft-ietf-regext-login-security.

    A.5.  Change from REGEXT 00 to REGEXT 01

       Changed the <loginSec:userAgent> element to be structured with the
       <loginSec:app>, <loginSec:tech>, and <loginSec:os> sub-elements.
       This was based on the feedback from Martin Casanova.  This resulted
       in the need to change the XML namespace from

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       urn:ietf:params:xml:ns:epp:loginSec-0.3 to
       urn:ietf:params:xml:ns:epp:loginSec-0.4.

    Authors' Addresses

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

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

       Matthew Pozun
       VeriSign, Inc.
       12061 Bluemont Way
       Reston, VA  20190
       US

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

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