<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE rfcSYSTEM "rfc2629.dtd"[ <!ENTITYRFC1321 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.1321.xml">nbsp " "> <!ENTITYRFC2104 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.2104.xml">zwsp "​"> <!ENTITYRFC2119 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.2119.xml">nbhy "‑"> <!ENTITYRFC2315 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.2315.xml"> <!ENTITY RFC3275 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3275.xml"> <!ENTITY RFC3394 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3394.xml"> <!ENTITY RFC3713 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3713.xml"> <!ENTITY RFC3986 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3986.xml"> <!ENTITY RFC4050 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4050.xml"> <!ENTITY RFC4055 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4055.xml"> <!ENTITY RFC4269 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4269.xml"> <!ENTITY RFC4648 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4648.xml"> <!ENTITY RFC5869 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.5869.xml"> <!ENTITY RFC6234 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6234.xml"> <!ENTITY RFC7748 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.7748.xml"> <!ENTITY RFC8017 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8017.xml"> <!ENTITY RFC8032 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8032.xml"> <!ENTITY RFC8126 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8126.xml"> <!ENTITY RFC8174 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8174.xml"> <!ENTITY RFC8391 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8391.xml"> <!ENTITY RFC8439 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8439.xml"> <!ENTITY RFC3075 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3075.xml"> <!ENTITY RFC3076 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3076.xml"> <!ENTITY RFC3092 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3092.xml"> <!ENTITY RFC3741 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3741.xml"> <!ENTITY RFC4010 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4010.xml"> <!ENTITY RFC6090 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6090.xml"> <!ENTITY RFC6151 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6151.xml"> <!ENTITY RFC6194 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6194.xml"> <!ENTITY RFC6931 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6931.xml"> <!ENTITY RFC7465 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.7465.xml"> <!ENTITY RFC7696 SYSTEM "https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.7696.xml">wj "⁠"> ]> <rfcsubmissionType="IETF"xmlns:xi="http://www.w3.org/2001/XInclude" docName="draft-eastlake-rfc6931bis-xmlsec-uris-27" number="9231" submissionType="IETF" category="std" consensus="true" obsoletes="6931"ipr="trust200902"> <!-- Generated by id2xml 1.5.0 on 2022-04-06T23:07:29Z --> <?rfc strict="yes"?> <?rfc compact="yes"?> <?rfc subcompact="no"?> <?rfc symrefs="yes"?> <?rfc sortrefs="yes"?> <?rfc text-list-symbols="o-*+"?> <?rfc toc="yes"?>updates="" ipr="trust200902" xml:lang="en" symRefs="true" sortRefs="true" tocInclude="true" version="3"> <front> <title abbrev="Additional XML Security URIs">Additional XML Security Uniform Resource Identifiers (URIs)</title> <seriesInfo name="RFC" value="9231"/> <author initials="D."surname="Eastlake"surname="Eastlake 3rd" fullname="Donald E. Eastlake 3rd"> <organization>Futurewei Technologies, Inc.</organization> <address> <postal> <street>2386 Panoramic Circle</street> <city>Apopka</city> <region>FL</region> <code>32703</code><country>USA</country><country>United States of America</country> </postal> <phone>+1-508-333-2270</phone> <email>d3e3e3@gmail.com</email><uri></uri><uri/> </address> </author> <date year="2022"month="April" /> <!-- [rfced] Please review. Unable to determine which <area> and <workgroup> this doc should belong to --> <area></area> <workgroup></workgroup> <abstract><t>month="June"/> <keyword> XMLSEC</keyword> <keyword>XMLDSIG </keyword> <keyword>XMLENC </keyword> <keyword>DigestMethod </keyword> <keyword>SigntureMethod </keyword> <keyword>EncryptionMethod </keyword> <keyword>AgreementMethod </keyword> <keyword>KeyDerivationMethod </keyword> <keyword>KeyInfoy </keyword> <abstract> <t> This document updates and corrects the IANA "XML Security URIs" registry that lists URIs intended for use with XML digital signatures, encryption, canonicalization, and key management. These URIs identify algorithms and types of information. This document alsoupdates,obsoletes and corrects three errataagainst, and obsoletesagainst RFC 6931.</t> </abstract> </front> <middle> <sectiontitle="Introduction" anchor="sect-1"><t>anchor="sect-1" numbered="true" toc="default"> <name>Introduction</name> <t> XML digital signatures, canonicalization, and encryption were standardized by the W3C and by the joint IETF/W3C XMLDSIG working group[W3C] [XMLSEC].<xref target="W3C" format="default"/> <xref target="XMLSEC" format="default"/>. These are now W3C Recommendations and some are also RFCs. They are available as follows:</t><figure><artwork><![CDATA[ RFC Status W3C REC Topic ----------- ------- ----- [RFC3275] [XMLDSIG10] XML<table> <thead> <tr> <th>RFC <br/>Status</th> <th>W3C REC</th> <th>Topic</th> </tr> </thead> <tbody> <tr> <td> <xref target="RFC3275"/> <br/>Draft Standard</td> <td><xref target="XMLDSIG10"/></td> <td>XML DigitalSignatures Draft Standard [RFC3076] [CANON10] Canonical XML InformationalSignatures</td> </tr> <tr> <td> <xref target="RFC3076"/> <br/>Informational</td> <td><xref target="CANON10"/></td> <td>Canonical XML</td> </tr> <tr> <td> - - - - - -[XMLENC10] XML</td> <td><xref target="XMLENC10"/></td> <td>XML Encryption1.0 [RFC3741] [XCANON] Exclusive1.0</td> </tr> <tr> <td> <xref target="RFC3741"/> <br/>Informational</td> <td><xref target="XCANON"/></td> <td>Exclusive XML Canonicalization1.0 Informational ]]></artwork> </figure>1.0</td> </tr> </tbody> </table> <t> These documents and recommendations use URIs <xreftarget="RFC3986"/>target="RFC3986" format="default"/> to identify algorithms and keying information types. The W3C has subsequently produced updated XML Signature 1.1 <xreftarget="XMLDSIG11"/>,target="XMLDSIG11" format="default"/>, Canonical XML 1.1 <xreftarget="CANON11"/>,target="CANON11" format="default"/>, and XML Encryption 1.1 <xreftarget="XMLENC11"/>target="XMLENC11" format="default"/> versions, as well as a new XML Signature Properties specification <xreftarget="XMLDSIG-PROP"/>.</t>target="XMLDSIG-PROP" format="default"/>.</t> <t> In addition, the XML Encryption recommendation has been augmented by <xreftarget="GENERIC"/>target="GENERIC" format="default"/>, which defines algorithms, XML types, and elements necessary to use generic hybrid ciphers in XMLSecuritysecurity applications. <xreftarget="GENERIC"/>target="GENERIC" format="default"/> also provides for a key encapsulation algorithm and a data encapsulation algorithm, with the combination of the two forming the generic hybrid cipher.</t> <t> All camel-case element names (names with both interior upper and lower case letters) herein, such as DigestValue, are from these documents.</t> <t> This document is an updated convenient reference list of URIs and corresponding algorithms in which there is expressed interest. This document fixes Errata[Err3597], [Err3965], [Err4004] against<xref target="Err3597" format="default"/>, <xref target="Err3965" format="default"/>, and <xref target="Err4004" format="default"/>, and obsoletes <xreftarget="RFC6931"/>.</t>target="RFC6931" format="default"/>.</t> <t> All of the URIs for algorithms and data types herein are listed in the indexes in <xreftarget="sect-4"/>.target="sect-4" format="default"/>. Of these URIs, those that were added by earlier RFCs or by this document have a subsection in Section <xreftarget="sect-2"/>target="sect-2" format="counter"/> or3.<xref target="sect-3" format="counter"/>. A few URIs defined elsewhere also have a subsection in Section <xreftarget="sect-2"/>target="sect-2" format="counter"/> or3<xref target="sect-3" format="counter"/>, but most such URIs do not. For example, use of SHA-256 as defined in <xreftarget="XMLENC11"/>target="XMLENC11" format="default"/> has no subsection here but is included in the indexes in <xreftarget="sect-4"/>.</t>target="sect-4" format="default"/>.</t> <t> Specification in this document of the URI representing an algorithm does not imply endorsement of the algorithm for any particular purpose. A protocol specification, which this is not, generally gives algorithm and implementation requirements for the protocol. Security considerations for algorithms are constantly evolving, as documented elsewhere. This specification simply provides some URIs and relevant formatting when those URIs are used.</t> <t> This document is not intended to change the algorithm implementation requirements of any IETF or W3C document. Use of<xref target="RFC2119"/>/<xref target="RFC8174"/>terminology from <xref target="RFC2119" format="default"/> and <xref target="RFC8174" format="default"/> is intended to be only such as is already stated or implied by other authoritative documents.</t> <t> Progressing XML Digital Signature <xreftarget="RFC3275"/>target="RFC3275" format="default"/> along the Standards Track required removal of any algorithms from the original version <xreftarget="RFC3075"/>target="RFC3075" format="default"/> for which there was not demonstrated interoperability. This required removal of the Minimal Canonicalization algorithm, in which there was continued interest. The URI for Minimal Canonicalization was included in <xreftarget="RFC6931"/>target="RFC6931" format="default"/> and is included here.</t> <sectiontitle="Terminology" anchor="sect-1.1"><t>anchor="sect-1.1" numbered="true" toc="default"> <name>Terminology</name> <t> The key words"MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY","<bcp14>MUST</bcp14>", "<bcp14>MUST NOT</bcp14>", "<bcp14>REQUIRED</bcp14>", "<bcp14>SHALL</bcp14>", "<bcp14>SHALL NOT</bcp14>", "<bcp14>SHOULD</bcp14>", "<bcp14>SHOULD NOT</bcp14>", "<bcp14>RECOMMENDED</bcp14>", "<bcp14>NOT RECOMMENDED</bcp14>", "<bcp14>MAY</bcp14>", and"OPTIONAL""<bcp14>OPTIONAL</bcp14>" in this document are to be interpreted as described inBCP 14BCP 14 <xreftarget="RFC2119"/>target="RFC2119" format="default"/> <xreftarget="RFC8174"/>target="RFC8174" format="default"/> when, and only when, they appear in all capitals, as shown here.</t> <t> "camel-case" refers to terms that are mostly lower case but have internal capital letters.</t> </section> <sectiontitle="Acronyms" anchor="sect-1.2">anchor="sect-1.2" numbered="true" toc="default"> <name>Acronyms</name> <t>The following acronyms are used in this document:<list> <t>AAD -</t> <dl> <dt>AAD -</dt><dd> Additional AuthenticatedData</t> <t>AEAD -Data</dd> <dt>AEAD -</dt><dd> Authenticated Encryption withAdditional Data</t> <t>HMAC -Associated Data</dd> <dt>ASN.1 -</dt><dd>Abstract Syntax Notation 1</dd> <dt>BER -</dt><dd>Basic Encoding Rules <xref target="ITU-T-X.680"/></dd> <dt>DSA -</dt><dd>Digital Signature Algorithm</dd> <dt>DSS -</dt><dd>Digital Signature Standard <xref target="FIPS186-4"/></dd> <dt>ECDSA -</dt><dd>Elliptic Curve DSA</dd> <dt>HMAC -</dt><dd> Hashed Message Authentication Code <xreftarget="RFC2104"/>target="RFC2104" format="default"/> <xreftarget="RFC5869"/></t> <t>IETF -target="RFC5869" format="default"/></dd> <dt>IETF -</dt><dd> Internet Engineering Task Force <ereftarget="https://www.ietf.org"/></t> <t>MAC -brackets="angle" target="https://www.ietf.org"/></dd> <dt>MAC -</dt><dd> Message AuthenticationCode</t> <t>MD -Code</dd> <dt>MD -</dt><dd> MessageDigest</t> <t>NIST - UnitedDigest</dd> <dt>NIST -</dt><dd>United States National Institute of Standards and Technology <ereftarget="https://www.nist.gov"/></t> <t>RSA -brackets="angle" target="https://www.nist.gov"/></dd> <dt>OID -</dt><dd>Object Identifier <xref target="ITU-T-X.660"/></dd> <dt>PKCS -</dt><dd>Public Key Cryptography Standard</dd> <dt>RSA -</dt><dd> Rivest, Shamir, andAdleman</t> <t>SHA -Adleman</dd> <dt>SHA -</dt><dd> Secure HashAlgorithm</t> <t>URI -Algorithm</dd> <dt>URI -</dt><dd> Uniform Resource Identifier <xreftarget="RFC3986"/></t> <t>W3C -target="RFC3986" format="default"/></dd> <dt>W3C -</dt><dd> World Wide Web Consortium <ereftarget="https://www.w3.org"/></t> <t>XML -brackets="angle" target="https://www.w3.org"/></dd> <dt>XML -</dt><dd> eXtensible MarkupLanguage</t> </list> </t>Language</dd> </dl> </section> </section> <sectiontitle="Algorithms" anchor="sect-2"><t>anchor="sect-2" numbered="true" toc="default"> <name>Algorithms</name> <t> The URI <xreftarget="RFC3986"/>target="RFC3986" format="default"/> that was dropped from the XML Digital Signature standard due to the transition from Proposed Standard to Draft Standard <xreftarget="RFC3275"/>target="RFC3275" format="default"/> is included in <xreftarget="sect-2.4"/> belowtarget="sect-2.4" format="default"/> with its original<list> <t><eref</t> <t indent="6"><eref target="http://www.w3.org/2000/09/xmldsig#"/></t></list></t><t>prefix so as to avoid changing the XMLDSIG standard's namespace.</t> <t>Additional algorithms in RFC 4051 were given URIs that start with<list> <t><eref</t> <t indent="6"> <eref target="http://www.w3.org/2001/04/xmldsig-more#"/></t></list></t> <t>further<t>Further algorithms added in[RFC6931]<xref target="RFC6931"/> were given URIs that start with<list> <t><eref</t> <t indent="6"><eref target="http://www.w3.org/2007/05/xmldsig-more#"/></t></list></t><t>and algorithms added in this document are given URIs that startwith <list> <t><erefwith</t> <t indent="6"> <eref target="http://www.w3.org/2021/04/xmldsig-more#"/></t></list></t><!-- [rfced] Should we update the URLs and identifiers throughout this document to "https"? For example: Also, would you like the eref element to be used so that these are clickable links (in the HTML and PDF outputs)? Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-512-rsa-MGF1 Waiting to hearr back from Donald. --> <t> In addition, for ease of reference, this document includes in the indexes in <xreftarget="sect-4"/>target="sect-4" format="default"/> many cryptographic algorithm URIs from XML security documents using the namespaces with which they are defined in those documents as follows:<list> <t><eref</t> <t indent="6"> <eref target="http://www.w3.org/2000/09/xmldsig#"/></t></list></t><t>for some URIs specified in[RFC3275], <list> <t><eref<xref target="RFC3275"/>, </t> <t indent="6"><eref target="http://www.w3.org/2001/04/xmlenc#"/></t></list></t><t>for some URIs specified in <xreftarget="XMLENC10"/>,target="XMLENC10" format="default"/>, and<list> <t><eref</t> <t indent="6"><eref target="http://www.w3/org/xmlsec-ghc#"/></t></list></t><t>for some URIs specified in <xreftarget="GENERIC"/>.</t>target="GENERIC" format="default"/>.</t> <t>See also <xreftarget="XMLSECXREF"/>.</t>target="XMLSECXREF" format="default"/>.</t> <sectiontitle="DigestMethodanchor="sect-2.1" numbered="true" toc="default"> <name>DigestMethod (Hash)Algorithms" anchor="sect-2.1"><t>Algorithms</name> <t> These algorithms are usable wherever a DigestMethod element occurs.</t> <sectiontitle="MD5" anchor="sect-2.1.1"> <figure><artwork><![CDATA[anchor="sect-2.1.1" numbered="true" toc="default"> <name>MD5</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#md5 ]]></artwork></figure><t> The MD5 algorithm <xreftarget="RFC1321"/>target="RFC1321" format="default"/> takes no explicit parameters. An example of an MD5 DigestAlgorithm element is:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ <DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#md5"/> ]]></artwork></figure><t> An MD5 digest is a 128-bit string. The content of the DigestValue elementSHALL<bcp14>SHALL</bcp14> be the base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoding of this bit string viewed as a 16-octet stream. See <xreftarget="RFC6151"/>target="RFC6151" format="default"/> for MD5 security considerations.</t> </section> <sectiontitle="SHA-224" anchor="sect-2.1.2"> <figure><artwork><![CDATA[anchor="sect-2.1.2" numbered="true" toc="default"> <name>SHA-224</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#sha224 ]]></artwork></figure><t> The SHA-224 algorithm <xreftarget="FIPS180-4"/>target="FIPS180-4" format="default"/> <xreftarget="RFC6234"/>target="RFC6234" format="default"/> takes no explicit parameters. An example of a SHA-224 DigestAlgorithm element is:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ <DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha224" /> ]]></artwork></figure><t> A SHA-224 digest is a 224-bit string. The content of the DigestValue elementSHALL<bcp14>SHALL</bcp14> be the base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoding of this string viewed as a 28-octet stream.</t> </section> <sectiontitle="SHA-384" anchor="sect-2.1.3"> <figure><artwork><![CDATA[anchor="sect-2.1.3" numbered="true" toc="default"> <name>SHA-384</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#sha384 ]]></artwork></figure><t> The SHA-384 algorithm <xreftarget="FIPS180-4"/>target="FIPS180-4" format="default"/> takes no explicit parameters. An example of a SHA-384 DigestAlgorithm element is:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ <DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha384" /> ]]></artwork></figure><t> A SHA-384 digest is a 384-bit string. The content of the DigestValue elementSHALL<bcp14>SHALL</bcp14> be the base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoding of this string viewed as a 48-octet stream.</t> </section> <sectiontitle="Whirlpool" anchor="sect-2.1.4"> <figure><artwork><![CDATA[anchor="sect-2.1.4" numbered="true" toc="default"> <name>Whirlpool</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2007/05/xmldsig-more#whirlpool ]]></artwork></figure><t> The Whirlpool algorithm <xreftarget="ISO-10118-3"/>target="ISO-10118-3" format="default"/> takes no explicit parameters. An example of a Whirlpool DigestAlgorithm element is:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ <DigestAlgorithm Algorithm="http://www.w3.org/2007/05/xmldsig-more#whirlpool" /> ]]></artwork></figure><t> A Whirlpool digest is a 512-bit string. The content of the DigestValue elementSHALL<bcp14>SHALL</bcp14> be the base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoding of this string viewed as a 64-octet stream.</t> </section> <sectiontitle="SHA3 Algorithms" anchor="sect-2.1.5"> <figure><artwork><![CDATA[anchor="sect-2.1.5" numbered="true" toc="default"> <name>SHA-3 Algorithms</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224 http://www.w3.org/2007/05/xmldsig-more#sha3-256 http://www.w3.org/2007/05/xmldsig-more#sha3-384 http://www.w3.org/2007/05/xmldsig-more#sha3-512 ]]></artwork></figure><t> NIST conducted a hash function competition for an alternative to the SHA family. The Keccak-f[1600] algorithm was selected <xreftarget="Keccak"/>.target="KECCAK" format="default"/>. This hash function is commonly referred to as "SHA-3" <xreftarget="FIPS202"/>.</t>target="FIPS202" format="default"/>.</t> <t> A SHA-3 224, 256, 384, and 512 digest is a 224-, 256-, 384-, and 512-bit string, respectively. The content of the DigestValue elementSHALL<bcp14>SHALL</bcp14> be the base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoding of this string viewed as a 28-, 32-, 48-, and 64-octet stream, respectively. An example of a SHA3-224 DigestAlgorithm element is:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ <DigestAlgorithm Algorithm="http://www.w3.org/2007/05/xmldsig-more#sha3-224" /> ]]></artwork></figure></section> </section> <sectiontitle="SignatureMethodanchor="sect-2.2" numbered="true" toc="default"> <name>SignatureMethod MACAlgorithms" anchor="sect-2.2"><t>Algorithms</name> <t> This section covers SignatureMethodMAC (MessageMessage AuthenticationCode)Code (MAC) Algorithms.</t> <t> Note: Some text in this section is duplicated from <xreftarget="RFC3275"/>target="RFC3275" format="default"/> for the convenience of the reader. <xreftarget="RFC3275"/>target="RFC3275" format="default"/> is normative in case of conflict.</t> <sectiontitle="HMAC-MD5" anchor="sect-2.2.1"> <figure><artwork><![CDATA[anchor="sect-2.2.1" numbered="true" toc="default"> <name>HMAC-MD5</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#hmac-md5 ]]></artwork></figure><t> The HMAC algorithm <xreftarget="RFC2104"/>target="RFC2104" format="default"/> takes the truncation length in bits as a parameter; if the parameter is not specified, then all the bits of the hash are output. An example of an HMAC-MD5 SignatureMethod element is as follows:</t><figure><artwork><![CDATA[<sourcecode type="xml"><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-md5"> <HMACOutputLength>112</HMACOutputLength> </SignatureMethod>]]></artwork> </figure>]]></sourcecode> <t> The output of the HMAC algorithm is the output (possibly truncated) of the chosen digest algorithm. This valueSHALL<bcp14>SHALL</bcp14> be base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoded in the same straightforward fashion as the output of the digest algorithms. Example: the SignatureValue element for the HMAC-MD5 digest</t><figure><artwork><![CDATA[<artwork> 9294727A 3638BB1C 13F48EF8 158BFC9Dfrom</artwork> <t>from the test vectors in[RFC2104]<xref target="RFC2104"/> wouldbebe</t> <artwork> kpRyejY4uxwT9I74FYv8nQ== </artwork> <t> Schema Definition: </t> <sourcecode type="xml"><![CDATA[ <simpleType name="HMACOutputLength"> <restriction base="integer"/> </simpleType> ]]></sourcecode> <t> DTD: </t> <sourcecode><![CDATA[ <!ELEMENT HMACOutputLength (#PCDATA) >]]></artwork> </figure>]]></sourcecode> <t> The Schema Definition and DTD immediately above are copied from <xreftarget="RFC3275"/>.</t>target="RFC3275" format="default"/>.</t> <t> See <xreftarget="RFC6151"/>target="RFC6151" format="default"/> for HMAC-MD5 security considerations.</t> </section> <sectiontitle="HMACanchor="sect-2.2.2" numbered="true" toc="default"> <name>HMAC SHAVariations" anchor="sect-2.2.2"> <figure><artwork><![CDATA[Variations</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#hmac-sha224 http://www.w3.org/2001/04/xmldsig-more#hmac-sha256 http://www.w3.org/2001/04/xmldsig-more#hmac-sha384 http://www.w3.org/2001/04/xmldsig-more#hmac-sha512 ]]></artwork></figure><t> SHA-224, SHA-256, SHA-384, and SHA-512 <xreftarget="FIPS180-4"/>target="FIPS180-4" format="default"/> <xreftarget="RFC6234"/>target="RFC6234" format="default"/> can also be used in HMAC as described in <xreftarget="sect-2.2.1"/> abovetarget="sect-2.2.1" format="default"/> for HMAC-MD5.</t> </section> <sectiontitle="HMAC-RIPEMD160" anchor="sect-2.2.3"> <figure><artwork><![CDATA[anchor="sect-2.2.3" numbered="true" toc="default"> <name>HMAC-RIPEMD160</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160 ]]></artwork></figure><t> RIPEMD-160 <xreftarget="ISO-10118-3"/>target="ISO-10118-3" format="default"/> is a 160-bit hash that is used here in HMAC. The output can be optionally truncated. An example is as follows:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160"> <HMACOutputLength>144</HMACOutputLength> </SignatureMethod>]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="Poly1305" anchor="sect-2.2.4"> <figure><artwork><![CDATA[anchor="sect-2.2.4" numbered="true" toc="default"> <name>Poly1305</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2021/04/xmldsig-more#poly1305 ]]></artwork></figure><t> Poly1305 <xreftarget="RFC8439"/>target="RFC8439" format="default"/> <xreftarget="Poly1305"/>target="POLY1305" format="default"/> is a high-speed message authentication code algorithm. It takes a 32-octet one-time key and a message and produces a 16-octettagtag, which is used to authenticate the message. An example of a Poly1305 SignatureMethod element is as follows:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2021/04/xmldsig-more#poly1305"/>]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="SipHash-2-4" anchor="sect-2.2.5"> <figure><artwork><![CDATA[anchor="sect-2.2.5" numbered="true" toc="default"> <name>SipHash-2-4</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2021/04/xmldsig-more#siphash-2-4 ]]></artwork></figure><t> SipHash[SipHash1] [SipHash2]<xref target="SipHash1" format="default"/> <xref target="SipHash2" format="default"/> computes a 64-bit MAC from a 128-bit secret key and avariable lengthvariable-length message. An example of a SipHash-2-4 SignatureMethod element is as follows:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2021/04/xmldsig-more#siphash-2-4"/>]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="XMSSanchor="sect-2.2.6" numbered="true" toc="default"> <name>XMSS andXMSSMT" anchor="sect-2.2.6"><t>XMSSMT</name> <t> XMSS (eXtended Merkle Signature Scheme) and XMSSMT (XMSS Multi-Tree) <xreftarget="RFC8391"/>target="RFC8391" format="default"/> are stateful hash-based signature schemes[NIST800-208].<xref target="NIST800-208" format="default"/>. According to NIST, it is believed that the security of these schemes depends only on the security of the underlying hashfunctions --functions, in particular the infeasibility of finding a preimage or a secondpreimage --preimage, and it is believed that the security of these hash functions will not be broken by the development of large-scale quantum computers.</t> <t> For further information on the intended usage of these signature schemes and the careful state management required to maintain their strength, see[NIST800-208].</t><xref target="NIST800-208" format="default"/>.</t> <t> IANA maintains a registry whose entries correspond to the XMSS Identifiers below (see[XMSS]).<xref target="XMSS" format="default"/>). The fragment part of the URIs is formed by replacing occurrences of underscore ("_") in the name appearing in the IANARegistryregistry with hyphen ("-").</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers for XMSS: http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-512 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-512 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-10-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-16-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-20-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-20-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-10-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-16-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-20-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-20-256 ]]></artwork></figure><t> The hash functions used in the XMSS signature schemes above are SHA2 <xreftarget="RFC6234"/>target="RFC6234" format="default"/> or one of the twotheSHAKE extensible output functions <xreftarget="FIPS202"/>target="FIPS202" format="default"/> as indicated by the second token of the URI extension (SHAKE means SHAKE128). The tree height for XMSS is 10, 16, or 20 as indicated by the third token of the URI extension. The SHA2 or SHAKE output size is 192, 256, or 512 bits as indicated by the final token of the URI extension. SHA2 with 192 bits of output means SHA2-256/192, that is, the most significant 192 bits of the SHA-256 hash as specified in[NIST800-208].</t><xref target="NIST800-208" format="default"/>.</t> <t> IANA maintains a registry whose entries correspond to the XMSSMT Identifiers below (see[XMSS]).<xref target="XMSS" format="default"/>). The fragment part of the URIs is formed by replacing occurrences of underscore ("_") and slash ("/") in the name appearing in the IANARegistryregistry with hyphen ("-").</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers for XMSSMT: http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-2-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-4-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-8-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-8-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-3-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-3-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-6-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-6-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-12-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-12-512 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-2-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-2-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-4-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-4-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-8-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-8-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-3-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-3-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-6-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-6-256 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-12-192 http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-12-256 ]]></artwork></figure><t> The hash functions used in the XMSSMT signature schemes above are SHA2 <xreftarget="RFC6234"/>target="RFC6234" format="default"/> or one of the two the SHAKE extensible output function <xreftarget="FIPS202"/>target="FIPS202" format="default"/> as indicated by the second token of the URI extension (SHAKE means SHAKE128). The tree height for XMSSMT is 20, 40, or 60 as indicated by the third token of the URI extension. The number of layers is indicated by a fourth token. The SHA2, SHAKE, or SHAKE256 output size is 192, 256, or 512 bits as indicated by the final token of the URI extension. SHA2 with 192 bits of output means SHA2-256/192, that is, the most significant 192 bits of the SHA-256 hash as specified in[NIST800-208].</t><xref target="NIST800-208" format="default"/>.</t> <t> An example of an XMSS SignatureAlgorithm element is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureAlgorithm Algorithm="http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-192" />]]></artwork> </figure>]]></sourcecode> </section> </section> <sectiontitle="SignatureMethodanchor="sect-2.3" numbered="true" toc="default"> <name>SignatureMethod Public Key SignatureAlgorithms" anchor="sect-2.3"><t>Algorithms</name> <t> These algorithms are distinguished from those in <xreftarget="sect-2.2"/> abovetarget="sect-2.2" format="default"/> in that they use public key methods. That is to say, the signing key is different from and not feasibly derivable from the verification key.</t> <sectiontitle="RSA-MD5" anchor="sect-2.3.1"> <figure><artwork><![CDATA[anchor="sect-2.3.1" numbered="true" toc="default"> <name>RSA-MD5</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-md5 ]]></artwork></figure><t>This implies thePKCS#1PKCS #1 v1.5 padding algorithm described in[RFC8017].<xref target="RFC8017"/>. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-md5" />]]></artwork> </figure>]]></sourcecode> <t> The SignatureValue content for an RSA-MD5 signature is the base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoding of the octet string computed as per <xreftarget="RFC8017"/>, Section 8.2.1,target="RFC8017" section="8.2.1" sectionFormat="of"/>, signature generation for the RSASSA-PKCS1-v1_5 signature scheme. As specified in the EMSA-PKCS1-V1_5-ENCODE function in <xreftarget="RFC8017"/>, Section 9.2,target="RFC8017" section="9.2" sectionFormat="of"/>, the value input to the signature functionMUST<bcp14>MUST</bcp14> contain a prepended algorithm object identifier for the hash function, but the availability of an ASN.1 parser and recognition of OIDs is not required of a signature verifier. ThePKCS#1PKCS #1 v1.5 representation appears as:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ CRYPT (PAD (ASN.1 (OID, DIGEST (data)))) ]]></artwork></figure><t>The padded ASN.1 will be of the following form:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ 01 | FF* | 00 | prefix | hash ]]></artwork></figure><t>VerticalThe vertical bar ("|") represents concatenation. "01", "FF", and "00" are fixed octets of the corresponding hexadecimal value, and the asterisk ("*") after "FF" indicates repetition. "hash" is the MD5 digest of the data. "prefix" is the ASN.1 BER MD5 algorithm designator prefix required in PKCS #1 <xreftarget="RFC8017"/>,target="RFC8017" format="default"/>, that is,</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ hex 30 20 30 0c 06 08 2a 86 48 86 f7 0d 02 05 05 00 04 10 ]]></artwork></figure><t> This prefix is included to make it easier to use standard cryptographic libraries. The FF octetMUST<bcp14>MUST</bcp14> be repeated enough times that the value of the quantity being CRYPTed is exactly one octet shorter than the RSA modulus.</t> <t> See <xreftarget="RFC6151"/>target="RFC6151" format="default"/> for MD5 security considerations.</t> </section> <sectiontitle="RSA-SHA256" anchor="sect-2.3.2"> <figure><artwork><![CDATA[anchor="sect-2.3.2" numbered="true" toc="default"> <name>RSA-SHA256</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha256 ]]></artwork></figure><t> This implies thePKCS#1PKCS #1 v1.5 padding algorithm <xreftarget="RFC8017"/>target="RFC8017" format="default"/> as described in <xreftarget="sect-2.3.1"/>,target="sect-2.3.1" format="default"/> but with the ASN.1 BER SHA-256 algorithm designator prefix. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="RSA-SHA384" anchor="sect-2.3.3"> <figure><artwork><![CDATA[anchor="sect-2.3.3" numbered="true" toc="default"> <name>RSA-SHA384</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha384 ]]></artwork></figure><t> This implies thePKCS#1PKCS #1 v1.5 padding algorithm <xreftarget="RFC8017"/>target="RFC8017" format="default"/> as described in <xreftarget="sect-2.3.1"/>,target="sect-2.3.1" format="default"/> but with the ASN.1 BER SHA-384 algorithm designator prefix. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha384" />]]></artwork> </figure>]]></sourcecode> <t> Because it takes about the same effort to calculate a SHA-384 message digest as it does a SHA-512 message digest, it is suggested that RSA- SHA512 be used in preference to RSA-SHA384 where possible.</t> </section> <sectiontitle="RSA-SHA512" anchor="sect-2.3.4"> <figure><artwork><![CDATA[anchor="sect-2.3.4" numbered="true" toc="default"> <name>RSA-SHA512</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha512 ]]></artwork></figure><t> This implies thePKCS#1PKCS #1 v1.5 padding algorithm <xreftarget="RFC8017"/>target="RFC8017" format="default"/> as described in <xreftarget="sect-2.3.1"/>,target="sect-2.3.1" format="default"/> but with the ASN.1 BER SHA-512 algorithm designator prefix. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha512" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="RSA-RIPEMD160" anchor="sect-2.3.5"> <figure><artwork><![CDATA[anchor="sect-2.3.5" numbered="true" toc="default"> <name>RSA-RIPEMD160</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160 ]]></artwork></figure><t> This implies thePKCS#1PKCS #1 v1.5 padding algorithm <xreftarget="RFC8017"/>target="RFC8017" format="default"/> as described in <xreftarget="sect-2.3.1"/>,target="sect-2.3.1" format="default"/> but with the ASN.1 BER RIPEMD160 algorithm designator prefix. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="ECDSA-SHA*,anchor="sect-2.3.6" numbered="true" toc="default"> <name>ECDSA-SHA*, ECDSA-RIPEMD160,ECDSA-Whirlpool" anchor="sect-2.3.6"> <figure><artwork><![CDATA[ECDSA-Whirlpool</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha224 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha384 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha512 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-224 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-256 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-384 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-512 http://www.w3.org/2007/05/xmldsig-more#ecdsa-ripemd160 http://www.w3.org/2007/05/xmldsig-more#ecdsa-whirlpool ]]></artwork></figure><t> The Elliptic Curve Digital Signature Algorithm (ECDSA) <xreftarget="FIPS186-4"/>target="FIPS186-4" format="default"/> is the elliptic curve analogue of the Digital Signature Algorithm (DSA) signature method, i.e., the Digital Signature Standard (DSS). It takes no explicit parameters. For some detailed specifications of how to use it with SHA hash functions and XML Digital Signature, please see <xreftarget="X9.62"/>target="X9.62" format="default"/> and <xreftarget="RFC4050"/>.target="RFC4050" format="default"/>. The #sha3-*, #ecdsa-ripemd160, and #ecdsa-whirlpool fragments identify signature methods processed in the same way as specified by the #ecdsa-sha1 fragment, with the exception that a SHA3 function (see <xreftarget="sect-2.1.5"/>),target="sect-2.1.5" format="default"/>), RIPEMD160, or Whirlpool (see <xreftarget="sect-2.1.4"/>)target="sect-2.1.4" format="default"/>) is used instead of SHA-1.</t> <t> The output of the ECDSA algorithm consists of a pair of integers usually referred to as the pair (r, s). The signature value consists of the base64 encoding of the concatenation of two octet streams that respectively result from the octet encoding of the values r and s in that order. Conversion from integer tooctet-streamoctet stream must be done according to the I2OSP operation defined in the <xreftarget="RFC8017"/>target="RFC8017" format="default"/> specification with the l parameter equal to the size of the base point order of the curve in octets (e.g., 32 for the P-256 curve and 66 for the P-521 curve <xreftarget="FIPS186-4"/>).</t>target="FIPS186-4" format="default"/>).</t> <t> For an introduction to elliptic curve cryptographic algorithms, see <xreftarget="RFC6090"/>target="RFC6090" format="default"/> and note the errata (Errata IDs 2773-2777).</t> </section> <sectiontitle="ESIGN-SHA*" anchor="sect-2.3.7"> <figure><artwork><![CDATA[anchor="sect-2.3.7" numbered="true" toc="default"> <name>ESIGN-SHA*</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#esign-sha1 http://www.w3.org/2001/04/xmldsig-more#esign-sha224 http://www.w3.org/2001/04/xmldsig-more#esign-sha256 http://www.w3.org/2001/04/xmldsig-more#esign-sha384 http://www.w3.org/2001/04/xmldsig-more#esign-sha512 ]]></artwork></figure><t>The ESIGN algorithm specified in <xreftarget="IEEEP1363a"/>target="IEEEP1363a" format="default"/> is a signature scheme based on the integer factorization problem. </t> <t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#esign-sha1" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="RSA-Whirlpool" anchor="sect-2.3.8"> <figure><artwork><![CDATA[anchor="sect-2.3.8" numbered="true" toc="default"> <name>RSA-Whirlpool</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool ]]></artwork></figure><t> As in the definition of the RSA-SHA1 algorithm in <xreftarget="XMLDSIG11"/>,target="XMLDSIG11" format="default"/>, the designator "RSA" means the RSASSA-PKCS1-v1_5 algorithm as defined in <xreftarget="RFC8017"/>.target="RFC8017" format="default"/>. When identified through the #rsa-whirlpool fragment identifier, Whirlpool is used as the hash algorithm instead. Use of the ASN.1 BER Whirlpool algorithm designator is implied. That designator is:</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ hex 30 4e 30 0a 06 06 28 cf 06 03 00 37 05 00 04 40 ]]></artwork></figure><t> as an explicit octet sequence. This corresponds to OID 1.0.10118.3.0.55 defined in <xreftarget="ISO-10118-3"/>.</t>target="ISO-10118-3" format="default"/>.</t> <t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="RSASSA-PSS with Parameters" anchor="sect-2.3.9"> <figure><artwork><![CDATA[anchor="sect-2.3.9" numbered="true" toc="default"> <name>RSASSA-PSS with Parameters</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2007/05/xmldsig-more#rsa-pss http://www.w3.org/2007/05/xmldsig-more#MGF1 ]]></artwork></figure><t> These identifiers use thePKCS#1PKCS #1 EMSA-PSS encoding algorithm <xreftarget="RFC8017"/>.target="RFC8017" format="default"/>. The RSASSA-PSS algorithm takes the digest method (hash function), a mask generation function, the salt length in octets (SaltLength), and the trailer field as explicit parameters.</t> <t> Algorithm identifiers for hash functions specified in XML encryption <xreftarget="XMLENC11"/>target="XMLENC11" format="default"/>, <xreftarget="XMLDSIG11"/>target="XMLDSIG11" format="default"/>, and in <xreftarget="sect-2.1"/>target="sect-2.1" format="default"/> are considered to be valid algorithm identifiers for hash functions. According to <xreftarget="RFC8017"/>,target="RFC8017" format="default"/>, the default value for the digest function is SHA-1, but due to the discovered weakness of SHA-1 <xreftarget="RFC6194"/>,target="RFC6194" format="default"/>, it is recommended that SHA-256 or a stronger hash function be used. Notwithstanding <xreftarget="RFC8017"/>,target="RFC8017" format="default"/>, SHA-256 is the default to be used with these SignatureMethod identifiers if no hash function has been specified.</t> <t> The default salt length for these SignatureMethod identifiers, if the SaltLength is not specified,SHALL<bcp14>SHALL</bcp14> be the number of octets in the hash value of the digestmethod,method as recommended in <xreftarget="RFC4055"/>.target="RFC4055" format="default"/>. In a parameterized RSASSA-PSSsignaturesignature, the ds:DigestMethod and the SaltLength parameters usually appear. If they do not, the defaults make this equivalent to <ereftarget="http://www.w3.org/2007/05/xmldsig-"/> more#sha256-rsa-MGF1brackets="angle" target="http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1"/> (see <xreftarget="sect-2.3.10"/>).target="sect-2.3.10" format="default"/>). The TrailerField defaults to 1 (0xBC) when omitted.</t> <t>Schema Definition (target namespace <eref brackets="angle" target="http://www.w3.org/2007/05/xmldsig-more#"/>):</t><figure><artwork><![CDATA[<sourcecode type="xml"><![CDATA[ <xs:element name="RSAPSSParams" type="pss:RSAPSSParamsType"> <xs:annotation> <xs:documentation> Top level element that can be used in xs:any namespace="#other" wildcard of ds:SignatureMethod content. </xs:documentation> </xs:annotation> </xs:element> <xs:complexType name="RSAPSSParamsType"> <xs:sequence> <xs:element ref="ds:DigestMethod" minOccurs="0"/> <xs:element name="MaskGenerationFunction" type="pss:MaskGenerationFunctionType" minOccurs="0"/> <xs:element name="SaltLength" type="xs:int" minOccurs="0"/> <xs:element name="TrailerField" type="xs:int" minOccurs="0"/> </xs:sequence> </xs:complexType> <xs:complexType name="MaskGenerationFunctionType"> <xs:sequence> <xs:element ref="ds:DigestMethod" minOccurs="0"/> </xs:sequence> <xs:attribute name="Algorithm" type="xs:anyURI" default="http://www.w3.org/2007/05/xmldsig-more#MGF1"/> </xs:complexType>]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="RSASSA-PSSanchor="sect-2.3.10" numbered="true" toc="default"> <name>RSASSA-PSS withoutParameters" anchor="sect-2.3.10"><t>Parameters</name> <t> <xreftarget="RFC8017"/>target="RFC8017" format="default"/> currently specifies only one mask generation function MGF1 based on a hash function. Although <xreftarget="RFC8017"/>target="RFC8017" format="default"/> allows for parameterization, the default is to use the same hash function as the digest method function. Only this default approach is supported by this section; therefore, the definition of a mask generation function type is not needed yet. The same applies to the trailer field. There is only one value (0xBC) specified in <xreftarget="RFC8017"/>.target="RFC8017" format="default"/>. Hence, this default parameter must be used for signature generation. The default salt length is the length of the hash function.</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-512-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#md2-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#md5-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha1-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha512-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#ripemd128-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#ripemd160-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#whirlpool-rsa-MGF1 ]]></artwork></figure><t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm= "http://www.w3.org/2007/05/xmldsig-more#SHA3-256-rsa-MGF1" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="RSA-SHA224" anchor="sect-2.3.11"> <figure><artwork><![CDATA[anchor="sect-2.3.11" numbered="true" toc="default"> <name>RSA-SHA224</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha224 ]]></artwork></figure><t> This implies thePKCS#1PKCS #1 v1.5 padding algorithm <xreftarget="RFC8017"/>target="RFC8017" format="default"/> as described in <xreftarget="sect-2.3.1"/>target="sect-2.3.1" format="default"/> but with the ASN.1 BER SHA-224 algorithm designator prefix. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha224" />]]></artwork> </figure>]]></sourcecode> <t> Because it takes about the same effort to calculate a SHA-224 message digest as it does a SHA-256 message digest, it is suggested that RSA-SHA256 be used in preference to RSA-SHA224 where possible.</t> <t> See alsoAppendix B<xref target="app-b"/> concerning an erroneous version of this URI that appeared in <xreftarget="RFC6931"/>.</t>target="RFC6931" format="default"/>.</t> </section> <sectiontitle="Edwards-Curve" anchor="sect-2.3.12"><t>anchor="sect-2.3.12" numbered="true" toc="default"> <name>Edwards-Curve</name> <t> The Edwards-curve Digital Signature Algorithm (EdDSA) is a variant of Schnorr's signature system with Edwards curves. A specification is provided and some advantages listed in <xreftarget="RFC8032"/>.target="RFC8032" format="default"/>. The general EdDSA takes 11 parameters that must be carefully chosen for secure and efficient operation. Identifiers for two variants, Ed25519 and Ed448, are given below.</t> <t> Ed25519 uses 32-octet public keys and produces 64-octet signatures. It provides about 128 bits of security and uses SHA-512 <xreftarget="RFC6234"/>target="RFC6234" format="default"/> internally as part of signature generation.</t> <t> Ed448 uses 57-octet public keys and produces 114-octet signatures. It provides about 224 bits of security and uses "SHAKE256" <xreftarget="FIPS202"/>target="FIPS202" format="default"/> internally as part of signature generation. (SHAKE256 is specified by NIST as an "Extensible Output Function" and not specified or approved by NIST as a secure hash function.)</t> <t> For further information on the variants of EdDSA identified below, see <xreftarget="RFC8032"/>.</t> <figure><artwork><![CDATA[target="RFC8032" format="default"/>.</t> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519ph http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519ctx http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519 http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448 http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448ph ]]></artwork></figure><t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <SignatureMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448" />]]></artwork> </figure>]]></sourcecode> </section> </section> <sectiontitle="Minimal Canonicalization" anchor="sect-2.4"><t>anchor="sect-2.4" numbered="true" toc="default"> <name>Minimal Canonicalization</name> <t> Thus far, two independent interoperable implementations of Minimal Canonicalization have not been announced. Therefore, whenXML Digital Signature"XML-Signature Syntax and Processing" was advanced along the Standards Track from <xreftarget="RFC3075"/>target="RFC3075" format="default"/> to <xreftarget="RFC3275"/>,target="RFC3275" format="default"/>, Minimal Canonicalization was dropped. However, there was still interest. For its definition, seeSection 6.5.1 of<xreftarget="RFC3075"/>.</t> <figure><artwork><![CDATA[target="RFC3075" section="6.5.1" sectionFormat="of"/>.</t> <artwork name="" type="" align="left" alt=""><![CDATA[ For reference, its identifier remains: http://www.w3.org/2000/09/xmldsig#minimal ]]></artwork></figure></section> <sectiontitle="Transform Algorithms" anchor="sect-2.5"><t>anchor="sect-2.5" numbered="true" toc="default"> <name>Transform Algorithms</name> <t> The XPointer Transform algorithm syntax is described below. All CanonicalizationMethod algorithms can also be used as Transform algorithms.</t> <sectiontitle="XPointer" anchor="sect-2.5.1"> <figure><artwork><![CDATA[anchor="sect-2.5.1" numbered="true" toc="default"> <name>XPointer</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#xptr ]]></artwork></figure><t> This transform algorithm takes an <xreftarget="XPointer"/>target="XPointer" format="default"/> as an explicit parameter. An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <Transform Algorithm="http://www.w3.org/2001/04/xmldsig-more/xptr"> <XPointer xmlns="http://www.w3.org/2001/04/xmldsig-more/xptr"> xpointer(id("foo")) xmlns(bar=http://foobar.example) xpointer(//bar:Zab[@Id="foo"]) </XPointer> </Transform> Schema Definition: <element name="XPointer" type="string"/> DTD: <!ELEMENT XPointer (#PCDATA) >]]></artwork> </figure>]]></sourcecode> <t> Input to this transform is an octet stream (which is then parsed into XML).</t> <t> Output from this transform is a node set; the results of the XPointer are processed as defined in the XMLDSIG specification <xreftarget="RFC3275"/>target="RFC3275" format="default"/> for a same-document XPointer.</t> </section> </section> <sectiontitle="EncryptionMethod Algorithms" anchor="sect-2.6"><t>anchor="sect-2.6" numbered="true" toc="default"> <name>EncryptionMethod Algorithms</name> <t> This subsection gives identifiers and information for several EncryptionMethod Algorithms.</t> <sectiontitle="ARCFOURanchor="sect-2.6.1" numbered="true" toc="default"> <name>ARCFOUR EncryptionAlgorithm" anchor="sect-2.6.1"> <figure><artwork><![CDATA[Algorithm</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2001/04/xmldsig-more#arcfour ]]></artwork></figure><t> ARCFOUR is a fast, simple stream encryption algorithm that is compatible with RSA Security's RC4 algorithm[RC4]<xref target="RC4" format="default"/> (Rivest Cipher 4); however, RC4 has been found to have a number of weaknesses and its use is prohibited in several IETFprotols,protocols, for example TLS <xreftarget="RFC7465"/>.target="RFC7465" format="default"/>. An example EncryptionMethod element using ARCFOUR is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#arcfour"> <KeySize>40</KeySize> </EncryptionMethod>]]></artwork> </figure>]]></sourcecode> <t>ArcfourARCFOUR makes use of the generic KeySize parameter specified and defined in <xreftarget="XMLENC11"/>.</t>target="XMLENC11" format="default"/>.</t> </section> <sectiontitle="Camelliaanchor="sect-2.6.2" numbered="true" toc="default"> <name>Camellia BlockEncryption" anchor="sect-2.6.2"> <figure><artwork><![CDATA[Encryption</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc http://www.w3.org/2001/04/xmldsig-more#camellia192-cbc http://www.w3.org/2001/04/xmldsig-more#camellia256-cbc ]]></artwork></figure><t> Camellia is a block cipher with the same interface as the AES[Camellia]<xreftarget="RFC3713"/>;target="CAMELLIA" format="default"/> <xref target="RFC3713" format="default"/>; it has a 128-bit block size and 128-, 192-, and 256-bit key sizes. In XMLEncryptionEncryption, Camellia is used in the same way as the AES: It is used in the Cipher Block Chaining (CBC) mode with a 128-bit initialization vector (IV). The resulting cipher text is prefixed by the IV. If included in XML output, it is then base64 encoded. An example Camellia EncryptionMethod is as follows:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm= "http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="Camelliaanchor="sect-2.6.3" numbered="true" toc="default"> <name>Camellia KeyWrap" anchor="sect-2.6.3"> <figure><artwork><![CDATA[Wrap</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#kw-camellia128 http://www.w3.org/2001/04/xmldsig-more#kw-camellia192 http://www.w3.org/2001/04/xmldsig-more#kw-camellia256 ]]></artwork></figure><t> Camellia[Camellia]<xreftarget="RFC3713"/>target="CAMELLIA" format="default"/> <xref target="RFC3713" format="default"/> key wrap is identical to the AES key wrap algorithm <xreftarget="RFC3394"/>target="RFC3394" format="default"/> specified in the XML Encryption standard with "AES" replaced by "Camellia". As with AES key wrap, the check value is 0xA6A6A6A6A6A6A6A6.</t> <t> The algorithm is the samewhateverregardless of the size of the Camellia key used in wrapping, called the "key encrypting key" or "KEK". If Camellia is supported, it is particularly suggested that wrapping 128-bit keys with a 128-bit KEK and wrapping 256-bit keys with a 256-bit KEK be supported.</t> <t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm= "http://www.w3.org/2001/04/xmldsig-more#kw-camellia128" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="PSEC-KEM,anchor="sect-2.6.4" numbered="true" toc="default"> <name>PSEC-KEM, RSAES-KEM, andECIES-KEM" anchor="sect-2.6.4"> <figure><artwork><![CDATA[ECIES-KEM</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#psec-kem http://www.w3.org/2010/xmlsec-ghc#rsaes-kem http://www.w3.org/2010/xmlsec-ghc#ecies-kem ]]></artwork></figure><t> These algorithms, specified in <xreftarget="ISO-18033-2"/>,target="ISO-18033-2" format="default"/>, are key encapsulation mechanisms using elliptic curve or RSA encryption. RSAEA-KEM and ECIES-KEM are also specified in <xreftarget="GENERIC"/>.</t>target="GENERIC" format="default"/>.</t> <t> An example of use of PSEC-KEM is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#psec-kem"> <ECParameters> <Version>version</Version> <FieldID>id</FieldID> <Curve>curve</Curve> <Base>base</Base> <Order>order</Order> <Cofactor>cofactor</Cofactor> </ECParameters> </EncryptionMethod>]]></artwork> </figure>]]></sourcecode> <t> See <xreftarget="ISO-18033-2"/>target="ISO-18033-2" format="default"/> for information on the parameters above.</t> </section> <sectiontitle="SEEDanchor="sect-2.6.5" numbered="true" toc="default"> <name>SEED BlockEncryption" anchor="sect-2.6.5"> <figure><artwork><![CDATA[Encryption</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2007/05/xmldsig-more#seed128-cbc ]]></artwork></figure><t> SEED <xreftarget="RFC4269"/>target="RFC4269" format="default"/> is a block cipher with a 128-bit block size and 128-bit key size. In XML Encryption, SEED can be used in the Cipher Block Chaining (CBC) mode with a 128-bit initialization vector (IV). The resulting cipher text is prefixed by the IV. If included in XML output, it is then base64 encoded.</t> <t> An example SEED EncryptionMethod is as follows:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#seed128-cbc" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="SEEDanchor="sect-2.6.6" numbered="true" toc="default"> <name>SEED KeyWrap" anchor="sect-2.6.6"> <figure><artwork><![CDATA[Wrap</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2007/05/xmldsig-more#kw-seed128 ]]></artwork></figure><t> Key wrapping with SEED is identical toSection 2.2.1 of<xreftarget="RFC3394"/>target="RFC3394" section="2.2.1" sectionFormat="of"/> with "AES" replaced by "SEED". The algorithm is specified in <xreftarget="RFC4010"/>.target="RFC4010" format="default"/>. The implementation of SEED is optional. The default initial value is 0xA6A6A6A6A6A6A6A6.</t> <t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm= "http://www.w3.org/2007/05/xmldsig-more#kw-seed128" />]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="ChaCha20" anchor="sect-2.6.7"> <figure><artwork><![CDATA[anchor="sect-2.6.7" numbered="true" toc="default"> <name>ChaCha20</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2021/04/xmldsig-more#chacha20 ]]></artwork></figure><t> ChaCha20 <xreftarget="RFC8439"/>,target="RFC8439" format="default"/>, a stream cipher, is a variant of Salsa20 <xreftarget="ChaCha"/>.target="ChaCha" format="default"/>. It is considerably faster than AES in software-only implementations. In addition to a 256-bit key and the plain text to be encrypted, ChaCha20 takes a 96-bit Nonce and an initial 32-bit Counter. The Nonce and Counter are represented as hex in nested elements as shown below.</t> <t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#chacha20"> <Nonce>0123456789abcdef01234567</Nonce> <Counter>fedcba09</Counter> </EncryptionMethod>]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="ChaCha20+Poly1305" anchor="sect-2.6.8"> <figure><artwork><![CDATA[anchor="sect-2.6.8" numbered="true" toc="default"> <name>ChaCha20+Poly1305</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2021/04/xmldsig-more#chacha20poly1305 ]]></artwork></figure><t> ChaCha20+Poly1305 is an Authenticated Encryption withAdditionalAssociated Data (AEAD) algorithm. In addition to a 256-bit key and plain text to be encrypted and authenticated, ChaCha20+Poly1305 takes a 96-bit Nonce andvariable lengthvariable-length Additional Authenticated Data (AAD). The Nonce is represented as a child element of the EncryptionMethod element with a hex value. The AAD is astringstring, which may be null. The AAD element may beabsentabsent, in which case the AAD is null. The CipherData, either present in the CipherValue or by reference, is the concatenation of the encrypted ChaCha20 output and the Poly1305 128-bit tag.</t> <t> An example of use is:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <EncryptionMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#chacha20poly1305"> <Nonce>0123456789abcdef01234567</Nonce> <AAD>The quick brown fox jumps over the lazy dog.</AAD> </EncryptionMethod>]]></artwork> </figure>]]></sourcecode> </section> </section> <sectiontitle="Keyanchor="sect-2.7" numbered="true" toc="default"> <name>Key AgreementMethodAlgorithms" anchor="sect-2.7">Algorithm</name> <t>This subsection gives identifiers and information<list style="symbols"><t>forfor an additional key AgreementMethod Algorithm <xreftarget="XMLENC11"/> and</t> <t>for a key derivation function HKDF since such an algorithm fits most naturally as an "AgreementMethod".</t> </list>target="XMLENC11" format="default"/>. </t> <sectiontitle="X25519anchor="sect-2.7.1" numbered="true" toc="default"> <name>X25519 and X448 KeyAgreement" anchor="sect-2.7.1"> <figure><artwork><![CDATA[Agreement</name> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2021/04/xmldsig-more#x25519 http://www.w3.org/2021/04/xmldsig-more#x448 ]]></artwork></figure><t> The X25519 and X448 key agreement algorithms are specified in <xreftarget="RFC7748"/>.</t>target="RFC7748" format="default"/>.</t> </section> </section> <sectiontitle="HKDFanchor = "sect-2.8" numbered="true" toc="default" > <name>KeyDerivationMethod Algorithm</name> <t>This subsection gives identifiers and information for an additional KeyDerivationMethod Algorithm <xref target="XMLENC11"/>. </t> <section anchor="sect-2.8.1" numbered="true" toc="default"> <name>HKDF KeyDerivation" anchor="sect-2.7.2"><t>Derivation</name> <t> This section covers the HMAC-based Extract-and-Expand Key Derivation Function (HKDF <xreftarget="RFC5869"/>).</t> <figure><artwork><![CDATA[target="RFC5869" format="default"/>).</t> <artwork name="" type="" align="left" alt=""><![CDATA[ Identifier: http://www.w3.org/2021/04/xmldsig-more#hkdf ]]></artwork></figure> <t> Although perhaps not exactly the sort of key agreement algorithm for which the AgreementMethod element was originally specified to go under the KeyInfo element, this is the most natural way to classify key derivation algorithms in XML security.</t><t> HKDF takes as inputs a hash function, an optional non-secret "salt", initial keying material (IKM), optional context andapplication specificapplication-specific "info", and the required output keying size. Note that these strictly determine the output so, for example, invoking HKDF at different times but with the same salt, info, initial keying material, and output key size will produce identical output keying material.</t> <t>The inputs can be supplied to HKDF as follows:</t><t><list style="hanging" hangIndent="6"> <t hangText="hash function:"><dl newline="false" spacing="normal" indent="6"> <dt>hash function:</dt> <dd> The algorithm attribute of a child DigestMethodelement.</t> <t hangText="salt:">element.</dd> <dt>salt:</dt> <dd> The content of a Salt child element of AgreementMethod in hex. If not provided, a string of zero octets as long as the hash function output is used as specified in <xreftarget="RFC5869"/>.</t> <t hangText="IKM:">target="RFC5869" format="default"/>.</dd> <dt>IKM:</dt> <dd> The content of an OriginatorKeyInfo child element of AgreementMethod in hex. May be absent in some applications where this is known through some other method.</t> <t hangText="info:"></dd> <dt>info:</dt> <dd> The content of the KA-Nonce child element of AgreementMethod in hex.</t> <t hangText="size:"></dd> <dt>size:</dt> <dd> The content of a KeySize child element of AgreementMethod as a decimalnumber.</t> </list> </t>number.</dd> </dl> <t> Here is the test case fromSection A.1 in Appendix A to<xreftarget="RFC5869"/>target="RFC5869" format="default" sectionFormat="of" section="A.1"/> as an example:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <AgreementMethod algorithm="http://www.w3.org/2021/04/xmldsig-more#hkdf"> <DigestMethod algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/> <Salt>000102030405060708090a0b0c</Salt> <OriginatorKeyInfo>0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b </OriginatorKeyInfo> <KA-Nonce>f0f1f2f3f4f5f6f7f8f9</KA-Nonce> <KeySize>42</KeySize> </AgreementMethod>]]></artwork> </figure>]]></sourcecode> </section> </section> </section> <sectiontitle="KeyInfo" anchor="sect-3"><t>anchor="sect-3" numbered="true" toc="default"> <name>KeyInfo</name> <t> In <xreftarget="sect-3.1"/> below,target="sect-3.1" format="default"/>, a KeyInfo element child is specified, while in <xreftarget="sect-3.2"/>,target="sect-3.2" format="default"/>, additional KeyInfo Type values for use in RetrievalMethod are specified.</t> <sectiontitle="PKCSanchor="sect-3.1" numbered="true" toc="default"> <name>PKCS #7 Bag of Certificates andCRLs" anchor="sect-3.1"><t>CRLs</name> <t> A PKCS #7 <xreftarget="RFC2315"/>target="RFC2315" format="default"/> "signedData" can also be used as a bag of certificates and/or certificate revocation lists (CRLs). The PKCS7signedData element is defined to accommodate such structures within KeyInfo. The binary PKCS #7 structure is base64 <xreftarget="RFC4648"/>target="RFC4648" format="default"/> encoded. Any signer information present is ignored. The following is an example <xreftarget="RFC3092"/>,target="RFC3092" format="default"/>, eliding the base64 data:</t><figure><artwork><![CDATA[<sourcecode><![CDATA[ <foo:PKCS7signedData xmlns:foo="http://www.w3.org/2001/04/xmldsig-more"> ... </foo:PKCS7signedData>]]></artwork> </figure>]]></sourcecode> </section> <sectiontitle="Additionalanchor="sect-3.2" numbered="true" toc="default"> <name>Additional RetrievalMethod TypeValues" anchor="sect-3.2"><t>Values</name> <t> The Type attribute of RetrievalMethod is an optional identifier for the type of data to be retrieved. The result of dereferencing a RetrievalMethod reference for all KeyInfo types with an XML structure is an XML element or document with that element as the root. The various "raw" key information types return a binary value. Thus, they require a Type attribute because they are not unambiguously parsable.</t><figure><artwork><![CDATA[<artwork name="" type="" align="left" alt=""><![CDATA[ Identifiers: http://www.w3.org/2001/04/xmldsig-more#KeyName http://www.w3.org/2001/04/xmldsig-more#KeyValue http://www.w3.org/2001/04/xmldsig-more#PKCS7signedData http://www.w3.org/2001/04/xmldsig-more#rawPGPKeyPacket http://www.w3.org/2001/04/xmldsig-more#rawPKCS7signedData http://www.w3.org/2001/04/xmldsig-more#rawSPKISexp http://www.w3.org/2001/04/xmldsig-more#rawX509CRL http://www.w3.org/2001/04/xmldsig-more#RetrievalMethod ]]></artwork></figure></section> </section> <sectiontitle="Indexes" anchor="sect-4"><t>anchor="sect-4" numbered="true" toc="default"> <name>Indexes</name> <t> The following subsections provide an index by URI and by fragment identifier (the portion of the URI after "#") of the algorithm and KeyInfo URIs defined in this document and in the standards plus the one KeyInfo child element name defined in this document. The "Sec/Doc" column has the section of this document or, if not specified in this document, the standards document where the item is specified. See also <xreftarget="XMLSECXREF"/>.</t>target="XMLSECXREF" format="default"/>.</t> <sectiontitle="Indexanchor="sect-4.1" numbered="true" toc="default"> <name>Index by FragmentIndex" anchor="sect-4.1"><t>Index</name> <t> The initial "http://www.w3.org/" part of the URI is not included below. The first six entries have a null fragment identifier or no fragment identifier. "{Bad}" indicates aBadbad value that was accidentally included in <xreftarget="RFC6931"/>.target="RFC6931" format="default"/>. ImplementationsSHOULD<bcp14>SHOULD</bcp14> only generate the correct URI butSHOULD<bcp14>SHOULD</bcp14> understand both the correct and erroneous URI. See alsoAppendix B.</t> <figure><artwork><![CDATA[<xref target="app-b"/>.</t> <artwork name="" type="" align="left" alt=""><![CDATA[ Fragment URI Sec/Doc --------- ---- -------- 2002/06/xmldsig-filter2 [XPATH] 2006/12/xmlc12n11# {Bad} [CANON11] 2006/12/xmlc14n11# [CANON11] TR/1999/REC-xslt-19991116 [XSLT] TR/1999/REC-xpath-19991116 [XPATH] TR/2001/06/xml-exc-c14n# [XCANON] TR/2001/REC-xml-c14n-20010315 [CANON10] TR/2001/REC-xmlschema-1-20010502[Schema][SCHEMA] aes128-cbc 2001/04/xmlenc#aes128-cbc [XMLENC11] aes128-gcm 2009/xmlenc11#aes128-gcm [XMLENC11] aes192-cbc 2001/04/xmlenc#aes192-cbc [XMLENC11] aes192-gcm 2009/xmlenc11#aes192-gcm [XMLENC11] aes256-cbc 2001/04/xmlenc#aes256-cbc [XMLENC11] aes256-gcm 2009/xmlenc11#aes256-gcm [XMLENC11] arcfour 2001/04/xmldsig-more#arcfour 2.6.1 base64 2000/09/xmldsig#base64 [RFC3275] camellia128-cbc 2001/04/xmldsig-more#camellia128-cbc 2.6.2 camellia192-cbc 2001/04/xmldsig-more#camellia192-cbc 2.6.2 camellia256-cbc 2001/04/xmldsig-more#camellia256-cbc 2.6.2 chacha20 2021/04/xmldsig-more#chacha20 2.6.7 chacha20poly1305 2021/04/xmldsig-more#chacha20poly1305 2.6.8 ConcatKDF 2009/xmlenc11#ConcatKDF [XMLENC11] decrypt#XML 2002/07/decrypt#XML [DECRYPT] decrypt#Binary 2002/07/decrypt#Binary [DECRYPT] DEREncodedKeyValue 2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11] dh 2001/04/xmlenc#dh [XMLENC11] dh-es 2009/xmlenc11#dh-es [XMLENC11] dsa-sha1 2000/09/xmldsig#dsa-sha1 [RFC3275] dsa-sha256 2009/xmldsig11#dsa-sha256 [XMLDSIG11] DSAKeyValue 2000/09/xmldsig#DSAKeyValue [XMLDSIG11] ECDH-ES 2009/xmlenc11#ECDH-ES [XMLENC11] ecdsa-ripemd160 2007/05/xmldsig-more#ecdsa-ripemd160 2.3.6 ecdsa-sha1 2001/04/xmldsig-more#ecdsa-sha1 2.3.6 ecdsa-sha224 2001/04/xmldsig-more#ecdsa-sha224 2.3.6 ecdsa-sha256 2001/04/xmldsig-more#ecdsa-sha256 2.3.6 ecdsa-sha384 2001/04/xmldsig-more#ecdsa-sha384 2.3.6 ecdsa-sha512 2001/04/xmldsig-more#ecdsa-sha512 2.3.6 ecdsa-sha3-224 2021/04/xmldsig-more#ecdsa-sha3-224 2.3.6 ecdsa-sha3-256 2021/04/xmldsig-more#ecdsa-sha3-256 2.3.6 ecdsa-sha3-384 2021/04/xmldsig-more#ecdsa-sha3-384 2.3.6 ecdsa-sha3-512 2021/04/xmldsig-more#ecdsa-sha3-512 2.3.6 ecdsa-whirlpool 2007/05/xmldsig-more#ecdsa-whirlpool 2.3.5 ecies-kem 2010/xmlsec-ghc#ecies-kem [GENERIC] ECKeyValue 2009/xmldsig11#ECKeyValue [XMLDSIG11] eddsa-ed25519 2021/04/xmldsig-more#eddsa-ed25519 2.3.12 eddsa-ed25519ctx 2021/04/xmldsig-more#eddsa-ed25519ctx 2.3.12 eddsa-ed25519ph 2021/04/xmldsig-more#eddsa-ed25519ph 2.3.12 eddsa-ed448 2021/04/xmldsig-more#eddsa-ed448 2.3.12 eddsa-ed448ph 2021/04/xmldsig-more#eddsa-ed448ph 2.3.12 enveloped-signature 2000/09/xmldsig#enveloped-signature [RFC3275] esign-sha1 2001/04/xmldsig-more#esign-sha1 2.3.7 esign-sha224 2001/04/xmldsig-more#esign-sha224 2.3.7 esign-sha256 2001/04/xmldsig-more#esign-sha256 2.3.7 esign-sha384 2001/04/xmldsig-more#esign-sha384 2.3.7 esign-sha512 2001/04/xmldsig-more#esign-sha512 2.3.7 generic-hybrid 2010/xmlsec-ghc#generic-hybrid [GENERIC] hkdf 2021/04/xmldsig-more#hkdf2.7.22.8.1 hmac-md5 2001/04/xmldsig-more#hmac-md5 2.2.1 hmac-ripemd160 2001/04/xmldsig-more#hmac-ripemd160 2.2.3 hmac-sha1 2000/09/xmldsig#hmac-sha1 [RFC3275] hmac-sha224 2001/04/xmldsig-more#hmac-sha224 2.2.2 hmac-sha256 2001/04/xmldsig-more#hmac-sha256 2.2.2 hmac-sha384 2001/04/xmldsig-more#hmac-sha384 2.2.2 hmac-sha512 2001/04/xmldsig-more#hmac-sha512 2.2.2 KeyName 2001/04/xmldsig-more#KeyName 3.2 KeyValue 2001/04/xmldsig-more#KeyValue 3.2 kw-aes128 2001/04/xmlenc#kw-aes128 [XMLENC11] kw-aes128-pad 2009/xmlenc11#kw-aes-128-pad [XMLENC11] kw-aes192 2001/04/xmlenc#kw-aes192 [XMLENC11] kw-aes192-pad 2009/xmlenc11#kw-aes-192-pad [XMLENC11] kw-aes256 2001/04/xmlenc#kw-aes256 [XMLENC11] kw-aes256-pad 2009/xmlenc11#kw-aes-256-pad [XMLENC11] kw-camellia128 2001/04/xmldsig-more#kw-camellia128 2.6.3 kw-camellia192 2001/04/xmldsig-more#kw-camellia192 2.6.3 kw-camellia256 2001/04/xmldsig-more#kw-camellia256 2.6.3 kw-seed128 2007/05/xmldsig-more#kw-seed128 2.6.6 md2-rsa-MGF1 2007/05/xmldsig-more#md2-rsa-MGF1 2.3.10 md5 2001/04/xmldsig-more#md5 2.1.1 md5-rsa-MGF1 2007/05/xmldsig-more#md5-rsa-MGF1 2.3.10 MGF1 2007/05/xmldsig-more#MGF1 2.3.9 mgf1sha1 2009/xmlenc11#mgf1sha1 [XMLENC11] mgf1sha224 2009/xmlenc11#mgf1sha224 [XMLENC11] mgf1sha256 2009/xmlenc11#mgf1sha256 [XMLENC11] mgf1sha384 2009/xmlenc11#mgf1sha384 [XMLENC11] mgf1sha512 2009/xmlenc11#mgf1sha512 [XMLENC11] MgmtData 2000/09/xmldsig#MgmtData [XMLDSIG11] minimal 2000/09/xmldsig#minimal 2.4 pbkdf2 2009/xmlenc11#pbkdf2 [XMLENC11] PGPData 2000/09/xmldsig#PGPData [XMLDSIG11] PKCS7signedData 2001/04/xmldsig-more#PKCS7signedData 3.1 PKCS7signedData 2001/04/xmldsig-more#PKCS7signedData 3.2 poly1305 2021/04/xmldsig-more#poly1305 2.2.4 psec-kem 2001/04/xmldsig-more#psec-kem 2.6.4 rawPGPKeyPacket 2001/04/xmldsig-more#rawPGPKeyPacket 3.2 rawPKCS7signedData 2001/04/xmldsig-more#rawPKCS7signedData 3.2 rawSPKISexp 2001/04/xmldsig-more#rawSPKISexp 3.2 rawX509Certificate 2000/09/xmldsig#rawX509Certificate [RFC3275] rawX509CRL 2001/04/xmldsig-more#rawX509CRL 3.2 RetrievalMethod 2001/04/xmldsig-more#RetrievalMethod 3.2 ripemd128-rsa-MGF1 2007/05/xmldsig-more#ripemd128-rsa-MGF1 2.3.10 ripemd160 2001/04/xmlenc#ripemd160 [XMLENC11] ripemd160-rsa-MGF1 2007/05/xmldsig-more#ripemd160-rsa-MGF1 2.3.10 rsa-1_5 2001/04/xmlenc#rsa-1_5 [XMLENC11] rsa-md5 2001/04/xmldsig-more#rsa-md5 2.3.1 rsa-oaep 2009/xmlenc11#rsa-oaep [XMLENC11] rsa-oaep-mgf1p 2001/04/xmlenc#rsa-oaep-mgf1p [XMLENC11] rsa-pss 2007/05/xmldsig-more#rsa-pss 2.3.9 rsa-ripemd160 2001/04/xmldsig-more#rsa-ripemd160 2.3.5 rsa-sha1 2000/09/xmldsig#rsa-sha1 [RFC3275] rsa-sha224 2007/05/xmldsig-more#rsa-sha224 {Bad} 2.3.11 rsa-sha224 2001/04/xmldsig-more#rsa-sha224 2.3.11 rsa-sha256 2001/04/xmldsig-more#rsa-sha256 2.3.2 rsa-sha384 2001/04/xmldsig-more#rsa-sha384 2.3.3 rsa-sha512 2001/04/xmldsig-more#rsa-sha512 2.3.4 rsa-whirlpool 2007/05/xmldsig-more#rsa-whirlpool 2.3.5 rsaes-kem 2010/xmlsec-ghc#rsaes-kem [GENERIC] RSAKeyValue 2000/09/xmldsig#RSAKeyValue [XMLDSIG11] seed128-cbc 2007/05/xmldsig-more#seed128-cbc 2.6.5 sha1 2000/09/xmldsig#sha1 [RFC3275] sha1-rsa-MGF1 2007/05/xmldsig-more#sha1-rsa-MGF1 2.3.10 sha224 2001/04/xmldsig-more#sha224 2.1.2 sha224-rsa-MGF1 2007/05/xmldsig-more#sha224-rsa-MGF1 2.3.10 sha256 2001/04/xmlenc#sha256 [XMLENC11] sha256-rsa-MGF1 2007/05/xmldsig-more#sha256-rsa-MGF1 2.3.10 sha3-224 2007/05/xmldsig-more#sha3-224 2.1.5 sha3-224-rsa-MGF1 2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10 sha3-256 2007/05/xmldsig-more#sha3-256 2.1.5 sha3-256-rsa-MGF1 2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10 sha3-384 2007/05/xmldsig-more#sha3-384 2.1.5 sha3-384-rsa-MGF1 2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10 sha3-512 2007/05/xmldsig-more#sha3-512 2.1.5 sha3-512-rsa-MGF1 2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10 sha384 2001/04/xmldsig-more#sha384 2.1.3 sha384-rsa-MGF1 2007/05/xmldsig-more#sha384-rsa-MGF1 2.3.10 sha512 2001/04/xmlenc#sha512 [XMLENC11] sha512-rsa-MGF1 2007/05/xmldsig-more#sha512-rsa-MGF1 2.3.10 siphash-2-4 2021/04/xmldsig-more#siphash-2-4 2.2.5 SPKIData 2000/09/xmldsig#SPKIData [XMLDSIG11] tripledes-cbc 2001/04/xmlenc#tripledes-cbc [XMLENC11] whirlpool 2007/05/xmldsig-more#whirlpool 2.1.4 whirlpool-rsa-MGF1 2007/05/xmldsig-more#whirlpool-rsa-MGF1 2.3.10 WithComments 2006/12/xmlc14n11#WithComments [CANON11] WithComments TR/2001/06/xml-exc-c14n#WithComments [XCANON] WithComments TR/2001/REC-xml-c14n-20010315#WithComments [CANON10] x25519 2021/04/xmldsig-more#x25519 2.7.1 x448 2021/04/xmldsig-more#x448 2.7.1 X509Data 2000/09/xmldsig#X509Data [XMLDSIG11] xmss-sha2-10-192 2021/04/xmldsig-more#xmss-sha2-10-192 2.2.6 xmss-sha2-10-256 2021/04/xmldsig-more#xmss-sha2-10-256 2.2.6 xmss-sha2-10-512 2021/04/xmldsig-more#xmss-sha2-10-512 2.2.6 xmss-sha2-16-192 2021/04/xmldsig-more#xmss-sha2-16-192 2.2.6 xmss-sha2-16-256 2021/04/xmldsig-more#xmss-sha2-16-256 2.2.6 xmss-sha2-16-512 2021/04/xmldsig-more#xmss-sha2-16-512 2.2.6 xmss-sha2-20-192 2021/04/xmldsig-more#xmss-sha2-20-192 2.2.6 xmss-sha2-20-256 2021/04/xmldsig-more#xmss-sha2-20-256 2.2.6 xmss-sha2-20-512 2021/04/xmldsig-more#xmss-sha2-20-512 2.2.6 xmss-shake-10-256 2021/04/xmldsig-more#xmss-shake-10-256 2.2.6 xmss-shake-10-512 2021/04/xmldsig-more#xmss-shake-10-512 2.2.6 xmss-shake-16-256 2021/04/xmldsig-more#xmss-shake-16-256 2.2.6 xmss-shake-16-512 2021/04/xmldsig-more#xmss-shake-16-512 2.2.6 xmss-shake-20-256 2021/04/xmldsig-more#xmss-shake-20-256 2.2.6 xmss-shake-20-512 2021/04/xmldsig-more#xmss-shake-20-512 2.2.6 xmss-shake256-10-192 2021/04/xmldsig-more#xmss-shake256-10-192 2.2.6 xmss-shake256-10-256 2021/04/xmldsig-more#xmss-shake256-10-256 2.2.6 xmss-shake256-16-192 2021/04/xmldsig-more#xmss-shake256-16-192 2.2.6 xmss-shake256-16-256 2021/04/xmldsig-more#xmss-shake256-16-256 2.2.6 xmss-shake256-20-192 2021/04/xmldsig-more#xmss-shake256-20-192 2.2.6 xmss-shake256-20-256 2021/04/xmldsig-more#xmss-shake256-20-256 2.2.6 xmssmt-sha2-20-2-192 2021/04/xmldsig-more#xmssmt-sha2-20-2-192 2.2.6 xmssmt-sha2-20-2-256 2021/04/xmldsig-more#xmssmt-sha2-20-2-256 2.2.6 xmssmt-sha2-20-2-256 2021/04/xmldsig-more#xmssmt-sha2-20-2-512 2.2.6 xmssmt-sha2-20-4-192 2021/04/xmldsig-more#xmssmt-sha2-20-4-192 2.2.6 xmssmt-sha2-20-4-256 2021/04/xmldsig-more#xmssmt-sha2-20-4-256 2.2.6 xmssmt-sha2-20-4-256 2021/04/xmldsig-more#xmssmt-sha2-20-4-512 2.2.6 xmssmt-sha2-40-2-192 2021/04/xmldsig-more#xmssmt-sha2-40-2-192 2.2.6 xmssmt-sha2-40-2-256 2021/04/xmldsig-more#xmssmt-sha2-40-2-256 2.2.6 xmssmt-sha2-40-2-256 2021/04/xmldsig-more#xmssmt-sha2-40-2-512 2.2.6 xmssmt-sha2-40-4-192 2021/04/xmldsig-more#xmssmt-sha2-40-4-192 2.2.6 xmssmt-sha2-40-4-256 2021/04/xmldsig-more#xmssmt-sha2-40-4-256 2.2.6 xmssmt-sha2-40-4-256 2021/04/xmldsig-more#xmssmt-sha2-40-4-512 2.2.6 xmssmt-sha2-40-8-192 2021/04/xmldsig-more#xmssmt-sha2-40-8-192 2.2.6 xmssmt-sha2-40-8-256 2021/04/xmldsig-more#xmssmt-sha2-40-8-256 2.2.6 xmssmt-sha2-40-8-256 2021/04/xmldsig-more#xmssmt-sha2-40-8-512 2.2.6 xmssmt-sha2-60-3-192 2021/04/xmldsig-more#xmssmt-sha2-60-3-192 2.2.6 xmssmt-sha2-60-3-256 2021/04/xmldsig-more#xmssmt-sha2-60-3-256 2.2.6 xmssmt-sha2-60-3-256 2021/04/xmldsig-more#xmssmt-sha2-60-3-512 2.2.6 xmssmt-sha2-60-6-192 2021/04/xmldsig-more#xmssmt-sha2-60-6-192 2.2.6 xmssmt-sha2-60-6-256 2021/04/xmldsig-more#xmssmt-sha2-60-6-256 2.2.6 xmssmt-sha2-60-6-256 2021/04/xmldsig-more#xmssmt-sha2-60-6-512 2.2.6 xmssmt-sha2-60-12-192 2021/04/xmldsig-more#xmssmt-sha2-60-12-192 2.2.6 xmssmt-sha2-60-12-256 2021/04/xmldsig-more#xmssmt-sha2-60-12-256 2.2.6 xmssmt-sha2-60-12-256 2021/04/xmldsig-more#xmssmt-sha2-60-12-512 2.2.6 xmssmt-shake-20-2-256 2021/04/xmldsig-more#xmssmt-shake-20-2-256 2.2.6 xmssmt-shake-20-2-512 2021/04/xmldsig-more#xmssmt-shake-20-2-512 2.2.6 xmssmt-shake-20-4-256 2021/04/xmldsig-more#xmssmt-shake-20-4-256 2.2.6 xmssmt-shake-20-4-512 2021/04/xmldsig-more#xmssmt-shake-20-4-512 2.2.6 xmssmt-shake-40-2-256 2021/04/xmldsig-more#xmssmt-shake-40-2-256 2.2.6 xmssmt-shake-40-2-512 2021/04/xmldsig-more#xmssmt-shake-40-2-512 2.2.6 xmssmt-shake-40-4-256 2021/04/xmldsig-more#xmssmt-shake-40-4-256 2.2.6 xmssmt-shake-40-4-512 2021/04/xmldsig-more#xmssmt-shake-40-4-512 2.2.6 xmssmt-shake-40-8-256 2021/04/xmldsig-more#xmssmt-shake-40-8-256 2.2.6 xmssmt-shake-40-8-512 2021/04/xmldsig-more#xmssmt-shake-40-8-512 2.2.6 xmssmt-shake-60-3-256 2021/04/xmldsig-more#xmssmt-shake-60-3-256 2.2.6 xmssmt-shake-60-3-512 2021/04/xmldsig-more#xmssmt-shake-60-3-512 2.2.6 xmssmt-shake-60-6-256 2021/04/xmldsig-more#xmssmt-shake-60-6-256 2.2.6 xmssmt-shake-60-6-512 2021/04/xmldsig-more#xmssmt-shake-60-6-512 2.2.6 xmssmt-shake-60-12-256 2021/04/xmldsig-more#xmssmt-shake-20-12-256 2.2.6 xmssmt-shake-60-12-512 2021/04/xmldsig-more#xmssmt-shake-20-12-512 2.2.6 xmssmt-shake256-20-2-192 2021/04/xmldsig-more#xmssmt-shake256-20-2-192 2.2.6 xmssmt-shake256-20-2-256 2021/04/xmldsig-more#xmssmt-shake256-20-2-256 2.2.6 xmssmt-shake256-20-4-192 2021/04/xmldsig-more#xmssmt-shake256-20-4-192 2.2.6 xmssmt-shake256-20-4-256 2021/04/xmldsig-more#xmssmt-shake256-20-4-256 2.2.6 xmssmt-shake256-40-2-192 2021/04/xmldsig-more#xmssmt-shake256-40-2-192 2.2.6 xmssmt-shake256-40-2-256 2021/04/xmldsig-more#xmssmt-shake256-40-2-256 2.2.6 xmssmt-shake256-40-4-192 2021/04/xmldsig-more#xmssmt-shake256-40-4-192 2.2.6 xmssmt-shake256-40-4-256 2021/04/xmldsig-more#xmssmt-shake256-40-4-256 2.2.6 xmssmt-shake256-40-8-192 2021/04/xmldsig-more#xmssmt-shake256-40-8-192 2.2.6 xmssmt-shake256-40-8-256 2021/04/xmldsig-more#xmssmt-shake256-40-8-256 2.2.6 xmssmt-shake256-60-3-192 2021/04/xmldsig-more#xmssmt-shake256-60-3-192 2.2.6 xmssmt-shake256-60-3-256 2021/04/xmldsig-more#xmssmt-shake256-60-3-256 2.2.6 xmssmt-shake256-60-6-192 2021/04/xmldsig-more#xmssmt-shake256-60-6-192 2.2.6 xmssmt-shake256-60-6-256 2021/04/xmldsig-more#xmssmt-shake256-60-6-256 2.2.6 xmssmt-shake256-60-12-192 2021/04/xmldsig-more#xmssmt-shake256-60-12-192 2.2.6 xmssmt-shake256-60-12-256 2021/04/xmldsig-more#xmssmt-shake256-60-12-256 2.2.6 xptr 2001/04/xmldsig-more#xptr 2.5.1 --------- ---- -------- Fragment URI Sec/Doc ]]></artwork></figure><t> The initial "http://www.w3.org/" part of the URI is not included above.</t> </section> <sectiontitle="Indexanchor="sect-4.2" numbered="true" toc="default"> <name>Index byURI" anchor="sect-4.2"><t>URI</name> <t> The initial "http://www.w3.org/" part of the URI is not included below. "{Bad}" indicates a Bad value that was accidentally included in <xreftarget="RFC6931"/>.target="RFC6931" format="default"/>. ImplementationsSHOULD<bcp14>SHOULD</bcp14> only generate the correct URI butSHOULD<bcp14>SHOULD</bcp14> understand both the correct and erroneous URI. See alsoAppendix B.</t> <figure><artwork><![CDATA[<xref target="app-b"/>.</t> <artwork name="" type="" align="left" alt=""><![CDATA[ URI Sec/Doc Type ---- -------- ------ 2000/09/xmldsig#base64 [RFC3275] Transform 2000/09/xmldsig#DSAKeyValue [RFC3275] Retrieval type 2000/09/xmldsig#dsa-sha1 [RFC3275] SignatureMethod 2000/09/xmldsig#enveloped-signature [RFC3275] Transform 2000/09/xmldsig#hmac-sha1 [RFC3275] SignatureMethod 2000/09/xmldsig#MgmtData [RFC3275] Retrieval type 2000/09/xmldsig#minimal 2.4 Canonicalization 2000/09/xmldsig#PGPData [RFC3275] Retrieval type 2000/09/xmldsig#rawX509Certificate [RFC3275] Retrieval type 2000/09/xmldsig#rsa-sha1 [RFC3275] SignatureMethod 2000/09/xmldsig#RSAKeyValue [RFC3275] Retrieval type 2000/09/xmldsig#sha1 [RFC3275] DigestAlgorithm 2000/09/xmldsig#SPKIData [RFC3275] Retrieval type 2000/09/xmldsig#X509Data [RFC3275] Retrieval type 2001/04/xmldsig-more#arcfour 2.6.1 EncryptionMethod 2001/04/xmldsig-more#camellia128-cbc 2.6.2 EncryptionMethod 2001/04/xmldsig-more#camellia192-cbc 2.6.2 EncryptionMethod 2001/04/xmldsig-more#camellia256-cbc 2.6.2 EncryptionMethod 2001/04/xmldsig-more#ecdsa-sha1 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha224 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha256 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha384 2.3.6 SignatureMethod 2001/04/xmldsig-more#ecdsa-sha512 2.3.6 SignatureMethod 2001/04/xmldsig-more#esign-sha1 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha224 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha256 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha384 2.3.7 SignatureMethod 2001/04/xmldsig-more#esign-sha512 2.3.7 SignatureMethod 2001/04/xmldsig-more#hmac-md5 2.2.1 SignatureMethod 2001/04/xmldsig-more#hmac-ripemd160 2.2.3 SignatureMethod 2001/04/xmldsig-more#hmac-sha224 2.2.2 SignatureMethod 2001/04/xmldsig-more#hmac-sha256 2.2.2 SignatureMethod 2001/04/xmldsig-more#hmac-sha384 2.2.2 SignatureMethod 2001/04/xmldsig-more#hmac-sha512 2.2.2 SignatureMethod 2001/04/xmldsig-more#KeyName 3.2 Retrieval type 2001/04/xmldsig-more#KeyValue 3.2 Retrieval type 2001/04/xmldsig-more#kw-camellia128 2.6.3 EncryptionMethod 2001/04/xmldsig-more#kw-camellia192 2.6.3 EncryptionMethod 2001/04/xmldsig-more#kw-camellia256 2.6.3 EncryptionMethod 2001/04/xmldsig-more#md5 2.1.1 DigestAlgorithm 2001/04/xmldsig-more#PKCS7signedData 3.2 Retrieval type 2001/04/xmldsig-more#psec-kem 2.6.4 EncryptionMethod 2001/04/xmldsig-more#rawPGPKeyPacket 3.2 Retrieval type 2001/04/xmldsig-more#rawPKCS7signedData 3.2 Retrieval type 2001/04/xmldsig-more#rawSPKISexp 3.2 Retrieval type 2001/04/xmldsig-more#rawX509CRL 3.2 Retrieval type 2001/04/xmldsig-more#RetrievalMethod 3.2 Retrieval type 2001/04/xmldsig-more#rsa-md5 2.3.1 SignatureMethod 2001/04/xmldsig-more#rsa-sha224 2.3.11 SignatureMethod 2001/04/xmldsig-more#rsa-sha256 2.3.2 SignatureMethod 2001/04/xmldsig-more#rsa-sha384 2.3.3 SignatureMethod 2001/04/xmldsig-more#rsa-sha512 2.3.4 SignatureMethod 2001/04/xmldsig-more#rsa-ripemd160 2.3.5 SignatureMethod 2001/04/xmldsig-more#sha224 2.1.2 DigestAlgorithm 2001/04/xmldsig-more#sha384 2.1.3 DigestAlgorithm 2001/04/xmldsig-more#xptr 2.5.1 Transform 2001/04/xmldsig-more#PKCS7signedData 3.1 KeyInfo child 2001/04/xmlenc#aes128-cbc [XMLENC11] EncryptionMethod 2001/04/xmlenc#aes192-cbc [XMLENC11] EncryptionMethod 2001/04/xmlenc#aes256-cbc [XMLENC11] EncryptionMethod 2001/04/xmlenc#dh [XMLENC11] AgreementMethod 2001/04/xmlenc#kw-aes128 [XMLENC11] EncryptionMethod 2001/04/xmlenc#kw-aes192 [XMLENC11] EncryptionMethod 2001/04/xmlenc#kw-aes256 [XMLENC11] EncryptionMethod 2001/04/xmlenc#ripemd160 [XMLENC11] DigestAlgorithm 2001/04/xmlenc#rsa-1_5 [XMLENC11] EncryptionMethod 2001/04/xmlenc#rsa-oaep-mgf1p [XMLENC11] EncryptionMethod 2001/04/xmlenc#sha256 [XMLENC11] DigestAlgorithm 2001/04/xmlenc#sha512 [XMLENC11] DigestAlgorithm 2001/04/xmlenc#tripledes-cbc [XMLENC11] EncryptionMethod 2002/06/xmldsig-filter2 [XPATH] Transform 2002/07/decrypt#XML [DECRYPT] Transform 2002/07/decrypt#Binary [DECRYPT] Transform 2006/12/xmlc12n11# {Bad} [CANON11] Canonicalization 2006/12/xmlc14n11# [CANON11] Canonicalization 2006/12/xmlc14n11#WithComments [CANON11] Canonicalization 2007/05/xmldsig-more#ecdsa-ripemd160 2.3.6 SignatureMethod 2007/05/xmldsig-more#ecdsa-whirlpool 2.3.5 SignatureMethod 2007/05/xmldsig-more#kw-seed128 2.6.6 EncryptionMethod 2007/05/xmldsig-more#md2-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#md5-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#MGF1 2.3.9 SignatureMethod 2007/05/xmldsig-more#ripemd128-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#ripemd160-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#rsa-pss 2.3.9 SignatureMethod 2007/05/xmldsig-more#rsa-sha224 {Bad} 2.3.11 SignatureMethod 2007/05/xmldsig-more#rsa-whirlpool 2.3.5 SignatureMethod 2007/05/xmldsig-more#seed128-cbc 2.6.5 EncryptionMethod 2007/05/xmldsig-more#sha1-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha224-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha256-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-224 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-256 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-384 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha3-512 2.1.5 DigestAlgorithm 2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha384-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#sha512-rsa-MGF1 2.3.10 SignatureMethod 2007/05/xmldsig-more#whirlpool 2.1.4 DigestAlgorithm 2007/05/xmldsig-more#whirlpool-rsa-MGF1 2.3.10 SignatureMethod 2009/xmlenc11#kw-aes-128-pad [XMLENC11] EncryptionMethod 2009/xmlenc11#kw-aes-192-pad [XMLENC11] EncryptionMethod 2009/xmlenc11#kw-aes-256-pad [XMLENC11] EncryptionMethod 2009/xmldsig11#dsa-sha256 [XMLDSIG11] SignatureMethod 2009/xmldsig11#ECKeyValue [XMLDSIG11] Retrieval type 2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11] Retrieval type 2009/xmlenc11#aes128-gcm [XMLENC11] EncryptionMethod 2009/xmlenc11#aes192-gcm [XMLENC11] EncryptionMethod 2009/xmlenc11#aes256-gcm [XMLENC11] EncryptionMethod 2009/xmlenc11#ConcatKDF [XMLENC11]EncryptionMethodKeyDerivation 2009/xmlenc11#mgf1sha1 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha224 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha256 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha384 [XMLENC11] SignatureMethod 2009/xmlenc11#mgf1sha512 [XMLENC11] SignatureMethod 2009/xmlenc11#pbkdf2 [XMLENC11]EncryptionMethodKeyDerivation 2009/xmlenc11#rsa-oaep [XMLENC11] EncryptionMethod 2009/xmlenc11#ECDH-ES [XMLENC11]EncryptionMethodAgreementMethod 2009/xmlenc11#dh-es [XMLENC11] EncryptionMethod 2010/xmlsec-ghc#generic-hybrid [GENERIC] Generic Hybrid 2010/xmlsec-ghc#rsaes-kem [GENERIC] Generic Hybrid 2010/xmlsec-ghc#ecies-kem [GENERIC] Generic Hybrid 2021/04/xmldsig-more#chacha20 2.6.7 EncryptionMethod 2021/04/xmldsig-more#chacha20poly1305 2.6.8 EncryptionMethod 2021/04/xmldsig-more#ecdsa-sha3-224 2.3.6 SignatureMethod 2021/04/xmldsig-more#ecdsa-sha3-256 2.3.6 SignatureMethod 2021/04/xmldsig-more#ecdsa-sha3-384 2.3.6 SignatureMethod 2021/04/xmldsig-more#ecdsa-sha3-512 2.3.6 SignatureMethod 2021/04/xmldsig-more#eddsa-ed25519ph 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed25519ctx 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed25519 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed448 2.3.12 SignatureMethod 2021/04/xmldsig-more#eddsa-ed448ph 2.3.12 SignatureMethod 2021/04/xmldsig-more#hkdf2.7.2 AgreementMethod2.8.1 KeyDerivation 2021/04/xmldsig-more#po1y305 2.2.4 SignatureMethod 2021/04/xmldsig-more#siphash-2-4 2.2.5 SignatureMethod 2021/04/xmldsig-more#x25519 2.7.1 AgreementMethod 2021/04/xmldsig-more#x448 2.7.1 AgreementMethod 2021/04/xmldsig-more#xmss-sha2-10-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-10-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-10-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-16-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-16-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-16-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-20-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-20-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-sha2-20-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-10-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-10-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-16-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-16-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-20-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake-20-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-10-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-10-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-16-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-16-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-20-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmss-shake256-20-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-20-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-8-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-8-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-40-8-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-3-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-3-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-3-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-6-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-6-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-6-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-12-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-12-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-sha2-60-12-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-20-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-2-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-4-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-8-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-40-8-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-3-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-3-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-6-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-6-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-12-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake-60-12-512 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-20-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-2-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-2-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-4-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-4-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-8-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-40-8-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-3-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-3-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-6-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-6-256 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-12-192 2.2.6 SignatureMethod 2021/04/xmldsig-more#xmssmt-shake256-60-12-256 2.2.6 SignatureMethod TR/1999/REC-xpath-19991116 [XPATH] Transform TR/1999/REC-xslt-19991116 [XSLT] Transform TR/2001/06/xml-exc-c14n# [XCANON] Canonicalization TR/2001/06/xml-exc-c14n#WithComments [XCANON] Canonicalization TR/2001/REC-xml-c14n-20010315 [CANON10] Canonicalization TR/2001/REC-xml-c14n-20010315#WithComments [CANON10] Canonicalization TR/2001/REC-xmlschema-1-20010502[Schema][SCHEMA] Transform ---- -------- ------ URI Sec/Doc Type ]]></artwork></figure><t> The initial "http://www.w3.org/" part of the URI is not included above. "{Bad}" indicates a Bad value that was accidentally included in <xreftarget="RFC6931"/>.target="RFC6931" format="default"/>. ImplementationsSHOULD<bcp14>SHOULD</bcp14> only generate the correct URI butSHOULD<bcp14>SHOULD</bcp14> understand both the correct and erroneous URI. See alsoAppendix B.</t><xref target="app-b"/>.</t> </section> </section> <sectiontitle="Allocation Considerations" anchor="sect-5"><t>anchor="sect-5" numbered="true" toc="default"> <name>Allocation Considerations</name> <t> W3C and IANA allocation considerations are given below.</t> <sectiontitle="W3Canchor="sect-5.1" numbered="true" toc="default"> <name>W3C AllocationConsiderations" anchor="sect-5.1"><t>Considerations</name> <t> As it is easy for people to construct their own unique URIs <xreftarget="RFC3986"/>target="RFC3986" format="default"/> and, if appropriate, to obtain a URI from the W3C, additional URI specification under the following XMLSEC URI prefixes is prohibited as shown:</t><figure><artwork><![CDATA[ URI Status --------------------------------------- ---------------------- http://www.w3.org/2000/09/xmldsig#<table> <thead> <tr> <th>URI</th> <th> Status</th> </tr> </thead> <tbody> <tr> <td> <eref target="http://www.w3.org/2000/09/xmldsig#"/> </td> <td> Frozen byW3C. http://www.w3.org/2001/04/xmldsig-more#W3C.</td> </tr> <tr> <td> <eref target="http://www.w3.org/2001/04/xmldsig-more#"/></td> <td> Frozen with RFC4051. http://www.w3.org/2007/05/xmldsig-more#4051.</td> </tr> <tr> <td> <eref target="http://www.w3.org/2007/05/xmldsig-more#"/></td> <td> Frozen with[RFC6931]. ]]></artwork> </figure><xref target="RFC6931"/>.</td> </tr> </tbody> </table> <t> The W3C has assigned"http://www.w3.org/2021/04/xmldsig-more#"<eref brackets="angle" target="http://www.w3.org/2021/04/xmldsig-more#"/> for additional new URIs specified in this document.</t> <t> There are also occurrences in this document of"http://www.w3.org/2010/xmlsec-ghc#"<eref brackets="angle" target="http://www.w3.org/2010/xmlsec-ghc#"/> due to the inclusion of some algorithms from <xreftarget="GENERIC"/>target="GENERIC" format="default"/> for convenience.</t> <t> An "xmldsig-more" URI does not imply any official W3C or IETF status for these algorithms or identifiers nor does it imply that they are only useful in digital signatures. Currently, dereferencing such URIs may or may not produce a temporary placeholder document. Permission to use these URI prefixes has been given by the W3C.</t> </section> <sectiontitle="IANA Considerations" anchor="sect-5.2"><t>anchor="sect-5.2" numbered="true" toc="default"> <name>IANA Considerations</name> <t> IANA has established a registry entitled "XML Security URIs". The contentswill behave been updated to correspond toSection 4.2<xref target="sect-4.2"/> of this document with each section number in the "Sec/Doc" column augmented with a reference to this RFC (for example, "2.6.4" means"[this document],"[RFC9231], Section 2.6.4"). All references to <xreftarget="RFC6931"/>target="RFC6931" format="default"/> in that registryshould behave been updated to[this document].</t>RFC 9231.</t> <t> New entries, including new Types, will be added based on Specification Required <xreftarget="RFC8126"/>.target="RFC8126" format="default"/>. Criteria for the designated expert for inclusion are (1) documentation sufficient for interoperability of the algorithm or data type and the XML syntax for its representation and use and (2) sufficient importance as normally indicated by inclusion in (2a) an approved W3C Note, Proposed Recommendation, orRecommendationRecommendation, or (2b) an approvedIETFRFC.</t> <t> Typically, the registry will reference a W3C or IETF document specifying such XML syntax; that document will either contain a more detailed description of the algorithm or data type or reference another document with a more detailed description.</t> </section> </section> <sectiontitle="Security Considerations" anchor="sect-6"><t>anchor="sect-6" numbered="true" toc="default"> <name>Security Considerations</name> <t> This RFC is concerned with documenting the URIs that designate algorithms and some data types used in connection with XML security. The security considerations vary widely with the particular algorithms, and the general security considerations for XML security are outside of the scope of this document but appear in <xreftarget="XMLDSIG11"/>,target="XMLDSIG11" format="default"/>, <xreftarget="XMLENC11"/>,target="XMLENC11" format="default"/>, <xreftarget="CANON10"/>,target="CANON10" format="default"/>, <xreftarget="CANON11"/>,target="CANON11" format="default"/>, and <xreftarget="GENERIC"/>.</t>target="GENERIC" format="default"/>.</t> <t> <xreftarget="RFC6151"/>target="RFC6151" format="default"/> should be consulted before considering the use of MD5 as a DigestMethod or the use of HMAC-MD5 or RSA-MD5 as a SignatureMethod.</t> <t> See <xreftarget="RFC6194"/>target="RFC6194" format="default"/> for SHA-1 security considerations.</t> <t> Additional security considerations are given in connection with the description of some algorithms in the body of this document.</t> <t> Implementers should be aware that cryptographic algorithms become weaker with time. As new cryptoanalysis techniques are developed and computing performance improves, the work factor to break a particular cryptographic algorithm will decrease. Therefore, cryptographic implementations should be modular, allowing new algorithms to be readily inserted. That is, implementers should be prepared for the set of mandatory-to-implement algorithms for any particular use to change over time. This is sometimes referred to as "algorithm agility" <xreftarget="RFC7696"/>.</t>target="RFC7696" format="default"/>.</t> </section> </middle> <back><references title="Normative References"><references> <name>References</name> <references> <name>Normative References</name> <referenceanchor="ISO-10118-3"><front>anchor="ISO-10118-3"> <front> <title>Information technology -- Security techniques --Hash-functions -- Part 3: Dedicated hash-functions</title> <author> <organization>ISO</organization> </author> <date year="2004"/> </front> <seriesInfo name="ISO/IEC" value="10118-3:2004"/> </reference> <referenceanchor="ISO-18033-2"><front>anchor="ISO-18033-2"> <front> <title>Information technology -- Security techniques --Encryption algorithms -- Part 3: Asymmetric ciphers</title> <author> <organization>ISO</organization> </author> <date year="2010"/> </front> <seriesInfo name="ISO/IEC" value="18033-2:2010"/> </reference> <reference anchor="FIPS180-4"target="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf"><front>target="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf"> <front> <title>Secure Hash Standard (SHS)</title> <author><organization>US National<organization>National Institute of Standards andTechnology</organization>Technology (NIST)</organization> </author> <datemonth="March" year="2012"/>month="August" year="2015"/> </front> <seriesInfo name="DOI" value="10.6028/NIST.FIPS.180-4"/> <seriesInfo name="FIPS" value="180-4"/> </reference> <reference anchor="FIPS186-4"target="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf"><front>target="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf"> <front> <title>Digital Signature Standard (DSS)</title> <author><organization>US National<organization>National Institute of Standards andTechnology</organization>Technology (NIST)</organization> </author> <date month="July" year="2013"/> </front> <seriesInfo name="FIPS" value="186-4"/> <seriesInfo name="DOI" value="10.6028/NIST.FIPS.186-4"/> </reference> <reference anchor="FIPS202"target="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf"><front>target="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf"> <front> <title>SHA-3 Standard: Permutation-Based Hash and Extendable-Output Functions</title> <author><organization>US National<organization>National Institute of Standards andTechnology</organization>Technology (NIST)</organization> </author> <date month="August" year="2015"/> </front> <seriesInfo name="FIPS" value="202"/> <seriesInfo name="DOI" value="10.6028/NIST.FIPS.202"/> </reference> <referenceanchor="IEEEP1363a"><front> <title>Standardanchor="IEEEP1363a"> <front> <title>IEEE Standard Specifications forPublic Key Cryptography-Public-Key Cryptography - Amendment 1: Additional Techniques</title> <author><organization>IEEE</organization><organization>Institute of Electrical and Electronics Engineers</organization> </author> <date year="2004"/> </front> <seriesInfoname="IEEE"name="IEEE Std" value="1363a-2004"/> </reference><!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(1966): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [NIST800-208] US National Institute of Standards and Technology, "Recommendation<reference anchor="NIST800-208" target="https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-208.pdf"> <front> <title>Recommendation for Stateful Hash-Based SignatureSchemes", NIST 800-208, Otober 202, <https://csrc.nist.gov/publications/detail/sp/800-208/final>. --> <!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(1971): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [RC4] Schneier, B., "AppliedSchemes</title> <author> <organization>National Institute of Standards and Technology (NIST)</organization> </author> <date month="October" year="2020"/> </front> <seriesInfo name="NIST" value="800-208"/> <seriesInfo name="DOI" value="10.6028/NIST.SP.800-208"/> </reference> <reference anchor="RC4"> <front> <title>Applied Cryptography: Protocols, Algorithms, and Source Code inC",C, SecondEdition, JohnEdition</title> <author initials="B." surname="Schneier" fullname="B. Schneier"> <organization/> </author> <date year="1996"/> </front> <seriesInfo name="John Wiley and Sons, New York,NY, 1996. --> &RFC1321; &RFC2104; &RFC2119; &RFC2315; &RFC3275; &RFC3394; &RFC3713; &RFC3986; &RFC4050; &RFC4055; &RFC4269; &RFC4648; &RFC5869; &RFC6234; &RFC7748; &RFC8017; &RFC8032; &RFC8126; &RFC8174; &RFC8391; &RFC8439; <!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2072): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [SipHash1] Aumasson, J. and D. Bernstein, "SipHash:NY" value=""/> </reference> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.1321.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.2104.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.2119.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.2315.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3275.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3394.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3713.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3986.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4050.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4055.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4269.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4648.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.5869.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6234.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.7748.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8017.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8032.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8126.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8174.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8391.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.8439.xml"/> <reference anchor="SipHash1" target="https://doi.org/10.1007/978-3-642-34931-7_28"> <front> <title>SipHash: A FastShort- Input PRF", ProgressShort-Input PRF</title> <author initials="J." surname="Aumasson" fullname="J. Aumasson"> <organization/> </author> <author initials="D." surname="Bernstein" fullname="D. Bernstein"> <organization/> </author> <date month="December" year="2012"/> </front> <seriesInfo name="Progress in Cryptology - INDOCRYPT 2012, Lecture Notes in ComputerScience, vol. 7668, December 2012, <https://doi.org/10.1007/978-3-642-34931-7_28>. -->Science" value="vol. 7668"/> </reference> <referenceanchor="X9.62"><front>anchor="X9.62"> <front> <title>Public Key Cryptography for the Financial Services Industry: The Elliptic Curve Digital Signature Algorithm (ECDSA)</title> <author> <organization>American National Standards Institute, Accredited Standards Committee X9</organization> </author> <date year="2005"/> </front> <seriesInfo name="ANSI" value="X9.62:2005"/> </reference> <reference anchor="XMLENC10"target="https://www.w3.org/TR/2002/REC-xmlenc-core-20021210/"><front>target="https://www.w3.org/TR/2002/REC-xmlenc-core-20021210/"> <front> <title>XML Encryption Syntax and Processing</title> <author initials="J." surname="Reagle" fullname="J. Reagle"> </author> <author initials="D."surname="Eastlake" fullname="D. Eastlake">surname="Eastlake 3rd" fullname="Donald Eastlake 3rd"> </author> <datemonth="10" year="December 2002"/>month="December" year="2002"/> </front> <seriesInfo name="W3C" value="Recommendation"/> </reference> <reference anchor="XMLENC11"target="https://www.w3.org/TR/xmlenc-core1/"><front>target="https://www.w3.org/TR/xmlenc-core1/"> <front> <title>XML Encryption Syntax and Processing Version 1.1</title> <author initials="D."surname="Eastlake" fullname="D. Eastlake">surname="Eastlake 3rd" fullname="Donald Eastlake 3rd"> </author> <author initials="J." surname="Reagle" fullname="J. Reagle"> </author> <author initials="F." surname="Hirsch" fullname="F. Hirsch"> </author> <author initials="T." surname="Roessler" fullname="T. Roessler"> </author> <datemonth="11" year="April 2013"/>month="April" year="2013"/> </front> <seriesInfo name="W3C" value="Proposed Recommendation"/> </reference> <reference anchor="XPointer"target="https://www.w3"><front>target="https://www.w3.org/TR/2003/REC-xptr-framework-20030325/"> <front> <title>XPointer Framework</title> <author initials="P." surname="Grosso" fullname="P. Grosso"> </author> <author initials="E." surname="Maler" fullname="E. Maler"> </author> <author initials="J." surname="Marsh" fullname="J. Marsh"> </author> <author initials="N." surname="Walsh" fullname="N. Walsh"> </author> <datemonth="25" year="March 2003"/>month="March" year="2003"/> </front> <seriesInfo name="W3C" value="Recommendation"/> </reference> </references><references title="Informational References"> <!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2097): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [Camellia] Aoki, K., Ichikawa, T., Matsui, M., Moriai, S., Nakajima, J., and T. Tokita, "Camellia:<references> <name>Informative References</name> <reference anchor="ITU-T-X.660" target="https://www.itu.int/rec/T-REC-X.660"> <front> <title>Information technology - Procedures for the operation of object identifier registration authorities: General procedures and top arcs of the international object identifier tree</title> <author> <organization showOnFrontPage="true">ITU-T</organization> </author> <date year="2011" month="July"/> </front> <seriesInfo name="ITU-T Recommendation" value="X.660"/> </reference> <reference anchor="ITU-T-X.680" target="https://www.itu.int/rec/T-REC-X.680"> <front> <title>Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation</title> <author> <organization showOnFrontPage="true">ITU-T</organization> </author> <date year="2021" month="February"/> </front> <seriesInfo name="ITU-T Recommendation" value="X.680"/> </reference> <reference anchor="CAMELLIA"> <front> <title>Camellia: A128-bit128-Bit Block Cipher Suitable for Multiple Platforms--- Design andAnalysis", inAnalysis</title> <author initials="K." surname="Aoki" fullname="Kazumaro Aoki"> <organization/> </author> <author initials="T." surname="Ichikawa" fullname="Tetsuya Ichikawa"> <organization/> </author> <author initials="M" surname="Kanda" fullname="Masayuki Kanda"> </author> <author initials="M." surname="Matsui" fullname="Mitsuru Matsui"> <organization/> </author> <author initials="S." surname="Moriai" fullname="Shiho Moriai"> <organization/> </author> <author initials="J." surname="Nakajima" fullname="Junko Nakajima"> <organization/> </author> <author initials="T." surname="Tokita" fullname="Toshio Tokita "> <organization/> </author> <date month="August" year="2000"/> </front> <refcontent>In Selected Areas inCryptography, 7thCryptography</refcontent> <refcontent>7th Annual InternationalWorkshop, SAC 2000, August 2000, Proceedings, Lecture Notes in Computer Science 2012, pp. 39-56, Springer-Verlag, 2001. -->Workshop</refcontent> <refcontent>SAC 2000</refcontent> </reference> <reference anchor="CANON10"target="https://www.w3.org/TR/2001/REC-xml-c14n-20010315"><front>target="https://www.w3.org/TR/2001/REC-xml-c14n-20010315"> <front> <title>Canonical XML Version 1.0</title> <author initials="J." surname="Boyer" fullname="J. Boyer"> </author> <datemonth="15" year="March 2001"/>month="March" year="2001"/> </front> <seriesInfo name="W3C" value="Recommendation"/> </reference> <reference anchor="CANON11"target="https://www.w3.org/TR/2008/REC-xml-c14n11-20080502/"><front>target="https://www.w3.org/TR/2008/REC-xml-c14n11-20080502/"> <front> <title>Canonical XML Version 1.1</title> <author initials="J." surname="Boyer" fullname="J. Boyer"> </author> <author initials="G." surname="Marcy" fullname="G. Marcy"> </author> <datemonth="2" year="May 2008"/>month="May" year="2008"/> </front> <seriesInfo name="W3C" value="Recommendation"/> </reference> <reference anchor="ChaCha"target="https://cr.yp.to/chacha/chacha-20080128.pdf"><front>target="https://cr.yp.to/chacha/chacha-20080128.pdf"> <front> <title>ChaCha, a variant of Salsa20</title> <author initials="D." surname="Bernstein" fullname="D. Bernstein"> </author> <date month="January" year="2008"/> </front> </reference> <reference anchor="DECRYPT"target="https://www.w3"><front>target="https://www.w3.org/TR/2002/REC-xmlenc-decrypt-20021210"> <front> <title>Decryption Transform for XML Signature</title> <author initials="M." surname="Hughes"fullname="M.fullname="Merlin Hughes"> </author> <author initials="T." surname="Imamura"fullname="T.fullname="Takeshi Imamura"> </author> <author initials="H." surname="Maruyama"fullname="H.fullname="Hiroshi Maruyama"> </author> <datemonth="10" year="December 2002"/>month="December" year="2002"/> </front> <seriesInfo name="W3C" value="Recommendation"/> </reference><!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2120): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [Err3597] RFC Errata, Errata<reference anchor="Err3597" target="https://www.rfc-editor.org/errata/eid3597"> <front> <title>Erratum ID3597, RFC 6931, <https://www.rfc-editor.org>. --> <!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2123): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [Err3965] RFC Errata, Errata3597</title> <author><organization>RFC Errata</organization></author> </front> <refcontent>RFC 6931</refcontent> </reference> <reference anchor="Err3965" target="https://www.rfc-editor.org/errata/eid3965"> <front> <title>Erratum ID3965, RFC 6931, <https://www.rfc-editor.org>. --> <!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2126): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [Err4004] RFC Errata,3965</title> <author> <organization>RFC Errata </organization> </author> </front> <refcontent>RFC 6931 </refcontent> </reference> <reference anchor="Err4004" target="https://www.rfc-editor.org/errata/eid4004"> <front> <title>Erratum ID4004, RFC 6931, <https://www.rfc-editor.org>. -->4004</title> <author> <organization>RFC Errata </organization> </author> </front> <refcontent>RFC 6931 </refcontent> </reference> <reference anchor="GENERIC"target="https://www.w3.org/TR/xmlsec-generic-hybrid/"><front>target="https://www.w3.org/TR/xmlsec-generic-hybrid/"> <front> <title>XML Security Generic Hybrid Ciphers</title> <author initials="M."surname="Nystrom" fullname="M. Nystrom">surname="Nyström" fullname="Magnus Nyström"> </author> <author initials="F." surname="Hirsch"fullname="F.fullname="Frederick Hirsch"> </author> <datemonth="11" year="April 2013"/>month="April" year="2013"/> </front> <seriesInfo name="W3C" value="Working Group Note"/> </reference> <referenceanchor="Keccak" target="http://keccak.noekeon.org"><front> <title>The KECCAKanchor="KECCAK" target="https://keccak.team/obsolete/Keccak-main-2.1.pdf"> <front> <title>KECCAK sponge function family</title> <author initials="G." surname="Bertoni"fullname="G.fullname="Guido Bertoni"> </author> <author initials="J." surname="Daeman"fullname="J. Daeman">fullname="Joan Daemen"> </author> <author initials="M." surname="Peeters"fullname="M.fullname="Michael Peeters"> </author> <author initials="G." surname="Van Assche"fullname="G.fullname="Gilles Van Assche"> </author> <datemonth="January" year="2013"/>month="June" year="2010"/> </front> <refcontent>Version 2.1</refcontent> </reference> <referenceanchor="Poly1305" target="https://cr.yp.to/mac/poly1305-20050329.pdf"><front>anchor="POLY1305" target="https://cr.yp.to/mac/poly1305-20050329.pdf"> <front> <title>The Poly1305-AES message-authentication code</title> <author initials="D." surname="Bernstein" fullname="D. Bernstein"> </author> <date month="March" year="2005"/> </front> </reference>&RFC3075; &RFC3076; &RFC3092; &RFC3741; &RFC4010; <!-- &RFC5869; Also in normative reference --> &RFC6090; &RFC6151; &RFC6194; &RFC6931; &RFC7465; &RFC7696;<xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3075.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3076.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3092.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.3741.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.4010.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6090.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6151.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6194.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.6931.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.7465.xml"/> <xi:include href="https://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.7696.xml"/> <referencegroup anchor="SCHEMA"> <referenceanchor="Schema" target="https://www.w3.org/TR/2004/REC-xmlschema-2-20041028/"><front>anchor='W3C.REC-xmlschema-1-20041028' target='https://www.w3.org/TR/2004/REC-xmlschema-1-20041028'> <front> <title>XML Schema Part 1: Structures SecondEdition", W3C Recommendation, 28 October 2004, <https://www.w3.org/TR/2004/REC-xmlschema-1-20041028/>. - Biron, P. and A. Malhotra, "XMLEdition</title> <author initials='H.' surname='Thompson' fullname='Henry Thompson'> <organization /> </author> <author initials='D.' surname='Beech' fullname='David Beech'> <organization /> </author> <author initials='M.' surname='Maloney' fullname='Murray Maloney'> <organization /> </author> <author initials='N.' surname='Mendelsohn' fullname='Noah Mendelsohn'> <organization /> </author> <date month='October' day='28' year='2004' /> </front> <seriesInfo name='W3C Recommendation' value='REC-xmlschema-1-20041028' /> </reference> <reference anchor='W3C.REC-xmlschema-2-20041028' target='https://www.w3.org/TR/2004/REC-xmlschema-2-20041028'> <front> <title>XML Schema Part 2: Datatypes Second Edition</title> <authorinitials="H." surname="Thompson" fullname="H. Thompson"> </author> <author initials="D." surname="Beech" fullname="D. Beech"> </author> <author initials="M." surname="Maloney" fullname="M. Maloney">initials='P.' surname='Biron' fullname='Paul V. Biron'> <organization /> </author> <authorinitials="N." surname="Mendelsohn" fullname="N. Mendelsohn">initials='A.' surname='Malhotra' fullname='Ashok Malhotra'> <organization /> </author> <datemonth="28" year="October 2004"/>month='October' day='28' year='2004' /> </front> <seriesInfoname="W3C" value="Recommendation"/>name='W3C Recommendation' value='REC-xmlschema-2-20041028' /> </reference><!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2204): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [SipHash2] Aumasson, J. and D. Bernstein, "SipHash:</referencegroup> <reference anchor="SipHash2" target="https://www.aumasson.jp/siphash/siphash.pdf"> <front> <title>SipHash: A FastShort- Input PRF", DepartmentShort-Input PRF</title> <author initials="J." surname="Aumasson" fullname="J. Aumasson"> <organization/> </author> <author initials="D." surname="Bernstein" fullname="D. Bernstein"> <organization/> </author> </front> <refcontent>Department of Computer Science,IniversityUniversity of Illinois atChicago, <https://www.aumasson.jp/siphash/siphash.pdf>. --> <!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2209): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [W3C] WorldChicago</refcontent> </reference> <reference anchor="W3C" target="https://www.w3.org"> <front> <title>World Wide WebConsortium, <https://www.w3.org>. -->Consortium (W3C)</title> <author></author> <date></date> </front> </reference> <reference anchor="XCANON"target="https://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/"><front>target="https://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/"> <front> <title>Exclusive XML Canonicalization Version 1.0</title> <author initials="J." surname="Boyer"fullname="J.fullname="John Boyer"> </author> <author initials="D."surname="Eastlake" fullname="D. Eastlake">surname="Eastlake 3rd" fullname="Donald Eastlake 3rd"> </author> <author initials="J." surname="Reagle"fullname="J.fullname="Joseph Reagle"> </author> <datemonth="18" year="July 2002"/>month="July" year="2002"/> </front><seriesInfo name="W3C" value="Recommendation"/><refcontent>W3C Recommendation</refcontent> </reference> <reference anchor="XMLDSIG10"target="https://www.w3.org/TR/2008/REC-xmldsig-core-20080610/"><front>target="https://www.w3.org/TR/2008/REC-xmldsig-core-20080610/"> <front> <title>XML Signature Syntax and Processing (Second Edition)</title> <authorinitials="D." surname="Eastlake" fullname="D. Eastlake">initials="M." surname="Bartel" fullname="Mark Bartel"> </author> <author initials="J."surname="Reagle" fullname="J. Reagle">surname="Boyer" fullname="John Boyer"> </author> <authorinitials="D." surname="Solo" fullname="D. Solo">initials="B." surname="Fox" fullname="Barb Fox"> </author> <authorinitials="F." surname="Hirsch" fullname="F. Hirsch">initials="E." surname="Simon" fullname="Ed Simon"> </author> <authorinitials="T." surname="Roessler" fullname="T. Roessler">initials="B" surname="LaMacchia" fullname="Brian LaMacchia"> </author> <datemonth="10" year="June 2008"/>month="June" year="2008"/> </front><seriesInfo name="W3C" value="Recommendation"/><refcontent>W3C Recommendation</refcontent> </reference> <reference anchor="XMLDSIG11"target="https://www.w3.org/TR/xmldsig-core1/"><front>target="https://www.w3.org/TR/xmldsig-core1/"> <front> <title>XML Signature Syntax and Processing Version 1.1</title> <authorinitials="D." surname="Eastlake" fullname="D. Eastlake"> </author>initials="M." surname="Bartel" fullname="Mark Bartel"/> <author initials="J."surname="Reagle" fullname="J. Reagle"> </author> <author initials="D." surname="Solo" fullname="D. Solo"> </author> <author initials="F." surname="Hirsch" fullname="F. Hirsch"> </author> <author initials="M." surname="Nystrom" fullname="M. Nystrom"> </author>surname="Boyer" fullname="John Boyer"/> <authorinitials="T." surname="Roessler" fullname="T. Roessler"> </author>initials="B." surname="Fox" fullname="Barb Fox"/> <authorinitials="K." surname="Yiu" fullname="K. Yiu"> </author>initials="E." surname="Simon" fullname="Ed Simon"/> <author initials="B" surname="LaMacchia" fullname="Brian LaMacchia"/> <datemonth="11" year="April 2013"/>month="April" year="2013"/> </front><seriesInfo name="W3C" value="Proposed Recommendation"/><refcontent>W3C Proposed Recommendation</refcontent> </reference> <reference anchor="XMLDSIG-PROP"target="https://www.w3.org/TR/2013/PR-xmldsig-properties-20130124/"><front>target="https://www.w3.org/TR/xmldsig-properties/"> <front> <title>XML Signature Properties</title> <author initials="F." surname="Hirsch"fullname="F.fullname="Frederick Hirsch"> </author> <datemonth="24" year="January 2013"/>month="April" year="2013"/> </front><seriesInfo name="W3C" value="Proposed Recommendation"/><refcontent>W3C Recommendation</refcontent> </reference><!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2229): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [XMLSEC] Eastlake, D., and K. Niles, "Secure<reference anchor="XMLSEC"> <front> <title>Secure XML: The New Syntax for Signatures andEncryption", Addison-WesleyEncryption</title> <author initials="D." surname="Eastlake 3rd" fullname="Donald Eastlake 3rd"> <organization/> </author> <author initials="K." surname="Niles" fullname="Kitty Niles"> <organization/> </author> <date year="2003"/> </front> <seriesInfo name="Addison-Wesley (PearsonEducation), 2003, ISBN 0-201-75605-6. -->Education)" value="ISBN 0-201-75605-6"/> </reference> <reference anchor="XMLSECXREF"target="https://www.w3"><front>target="https://www.w3.org/TR/xmlsec-algorithms/"> <front> <title>XML Security Algorithm Cross-Reference</title> <author initials="F." surname="Hirsch"fullname="F.fullname="Frederick Hirsch"> </author> <author initials="T." surname="Roessler"fullname="T.fullname="Thomas Roessler"> </author> <author initials="K." surname="Yiu"fullname="K.fullname="Kelvin Yiu"> </author> <datemonth="24" year="January 2013"/>month="April" year="2013"/> </front><seriesInfo name="W3C" value="Working<refcontent>W3C Working GroupNote"/>Note</refcontent> </reference><!-- draft-eastlake-rfc6931bis-xmlsec-uris-27-manual.txt(2238): Warning: Failed parsing a reference. Are all elements separated by commas (not periods, not just spaces)?: [XMSS] IANA Registry for XMSS and XMSSMT<reference anchor="XMSS" target="https://www.iana.org/assignments/xmss-extended-hash-based-signatures"> <front> <title>XMSS: Extended Hash-BasedSignature schemes: https://www.iana.org/assignments/xmss- extended-hash-based-signatures -->Signatures</title> <author><organization>IANA</organization></author> </front> </reference> <referencegroup anchor="XPATH"> <referenceanchor="XPATH" target="https://www.w3.org/TR/2010/REC-xpath20-20101214/"><front>anchor='W3C.REC-xmldsig-filter2-20021108' target='https://www.w3.org/TR/2002/REC-xmldsig-filter2-20021108'> <front> <title>XML-Signature XPath Filter2.0", W3C Recommendation, 8 November 2002, <https://www.w3.org/TR/2002/ REC-xmldsig-filter2-20021108/>. - Berglund, A., Boag, S., Chamberlin, D., Fernandez, M., Kay, M., Robie, J., and J. Simeon, "XML2.0</title> <author initials='J.' surname='Boyer' fullname='John Boyer'> <organization /> </author> <author initials='M.' surname='Hughes' fullname='Merlin Hughes'> <organization /> </author> <author initials='J.' surname='Reagle' fullname='Joseph Reagle'> <organization /> </author> <date month='November' day='8' year='2002' /> </front> <seriesInfo name='W3C Recommendation' value='REC-xmldsig-filter2-20021108' /> </reference> <reference anchor='W3C.REC-xpath20-20101214' target='https://www.w3.org/TR/2010/REC-xpath20-20101214'> <front> <title>XML Path Language (XPath) 2.0 (Second Edition)</title> <authorinitials="J." surname="Boyer" fullname="J. Boyer">initials='A.' surname='Berglund' fullname='Anders Berglund'> <organization /> </author> <authorinitials="M." surname="Hughes" fullname="M. Hughes">initials='S.' surname='Boag' fullname='Scott Boag'> <organization /> </author> <authorinitials="J." surname="Reagle" fullname="J. Reagle">initials='D.' surname='Chamberlin' fullname='Don Chamberlin'> <organization /> </author> <author initials='M.' surname='Fernandez' fullname='Mary Fernandez'> <organization /> </author> <author initials='M.' surname='Kay' fullname='Michael Kay'> <organization /> </author> <author initials='J.' surname='Robie' fullname='Jonathan Robie'> <organization /> </author> <author initials='J.' surname='Simeon' fullname='Jerome Simeon'> <organization /> </author> <datemonth="14" year="December 2010"/>month='December' day='14' year='2010' /> </front> <seriesInfoname="W3C" value="Recommendation"/>name='W3C Recommendation' value='REC-xpath20-20101214' /> </reference> </referencegroup> <reference anchor="XSLT"target="https://www.w3.org/TR/2007/REC-xslt20-20070123/"><front>target="https://www.w3.org/TR/xslt20/"> <front> <title>XSL Transformations (XSLT) Version 2.0</title> <author initials="M."surname="Saxonica" fullname="M. Saxonica">surname="Kay" fullname="Michael Kay"> </author> <datemonth="23" year="January 2007"/>month="March" year="2021"/> </front><seriesInfo name="W3C" value="Recommendation"/><refcontent>W3C Recommendation</refcontent> <refcontent>Second Edition</refcontent> </reference> </references> </references> <sectiontitle="Changesanchor="app-a" numbered="true" toc="default"> <name>Changes from[RFC6931]" anchor="sect-a"><t>RFC 6931</name> <t> The following changes have been made in <xreftarget="RFC6931"/>target="RFC6931" format="default"/> to produce this document.<!-- [rfced] This should be a numbered list. Changed to symbol because of the embedded <figure> --> <list style="symbols"> <t>Delete</t> <ul spacing="normal"> <li>Deleted Appendix on Changes from RFC 4051, since they were already included in <xreftarget="RFC6931"/>,target="RFC6931" format="default"/>, and remove reference to RFC 4051 and to the one Errata against RFC4051.</t> <t>Fix4051.</li> <li>Fixed three errata as follows:[Err3597], [Err3965],<xref target="Err3597" format="default"/>, <xref target="Err3965" format="default"/>, and[Err4004].<xref target="Err4004" format="default"/>. In cases where <xreftarget="RFC6931"/>target="RFC6931" format="default"/> had an erroneous URI, it is still included in the indices and it is stated that implementationsSHOULD<bcp14>SHOULD</bcp14> only generate the correct URI butSHOULD<bcp14>SHOULD</bcp14> understand both the correct and erroneousURI.</t> <t>AddedURI.</li> <li>Added the followingalgorithms:</t> </list></t> <figure><artwork><![CDATA[ Section Algorithm(s) ------- ------------ 2.2.4 Poly1305 2.2.5 SipHash-2-4 2.2.6 XMSS and XMSSMT 2.3.6 ECDSA with SHA3 2.3.12 Edwards-Curve Signatures 2.6.7 ChaCha20 2.6.8 ChaCha20+Poly1305 2.7.1 X25519 2.7.2 HKDF ]]></artwork> </figure> <t><list style="symbols"> <t>Listedalgorithms:</li> </ul> <table> <thead> <tr> <th> Section</th> <th> Algorithm(s)</th> </tr> </thead> <tbody> <tr> <td><xref target="sect-2.2.4" format="counter"/></td> <td>Poly1305</td> </tr> <tr> <td><xref target="sect-2.2.5" format="counter"/></td> <td>SipHash-2-4</td> </tr> <tr> <td><xref target="sect-2.2.6" format="counter"/></td> <td>XMSS and XMSSMT</td> </tr> <tr> <td><xref target="sect-2.3.6" format="counter"/></td> <td>ECDSA with SHA3</td> </tr> <tr> <td><xref target="sect-2.3.12" format="counter"/></td> <td>Edwards-Curve Signatures</td> </tr> <tr> <td><xref target="sect-2.6.7" format="counter"/></td> <td>ChaCha20</td> </tr> <tr> <td><xref target="sect-2.6.8" format="counter"/></td> <td>ChaCha20+Poly1305</td> </tr> <tr> <td><xref target="sect-2.7.1" format="counter"/></td> <td>X25519</td> </tr> <tr> <td><xref target="sect-2.8.1" format="counter"/></td> <td>HKDF</td> </tr> </tbody> </table> <ul spacing="normal"> <li>Listed ECIES-KEM and RSAES-KEM in <xreftarget="sect-2.6.4"/>target="sect-2.6.4" format="default"/> so they are easier to find even though the URI for them is specified in <xreftarget="GENERIC"/>.</t> <t>Updatedtarget="GENERIC" format="default"/>.</li> <li>Updated references for <xreftarget="GENERIC"/>target="GENERIC" format="default"/> and FIPS 186, added appropriatereferences.</t> <t>Addition ofreferences.</li> <li>Added some XMLexamples.</t> <t>Minor typo fixesexamples.</li> <li>Fixed minor typos and added editorialchanges.</t> </list></t>changes.</li> <li>A number of acronyms were added to <xref target="sect-1.2"/>.</li> </ul> </section> <sectiontitle="Bad URIs" anchor="sect-b"><t>anchor="app-b" numbered="true" toc="default"> <name>Bad URIs</name> <t> <xreftarget="RFC6931"/>target="RFC6931" format="default"/> included two bad URIs as shown below. "{Bad}" in the indexes (Sections4.1<xref target="sect-4.1" format="counter"/> and4.2)<xref target="sect-4.2" format="counter"/>) indicates such a bad value. ImplementationsSHOULD<bcp14>SHOULD</bcp14> only generate the correct URI butSHOULD<bcp14>SHOULD</bcp14> understand both the correct and erroneous URI.</t> <t>2006/12/xmlc12n11#<list> <t>Appears</t> <ul empty="true" spacing="normal"> <li>Appears in the indices(<xref target="sect-4.1"/>(Sections <xref section="4.1" sectionFormat="bare" target="RFC6931"/> and4.2] of<xref section="4.2" sectionFormat="bare" target="RFC6931"/> of <xref target="RFC6931" format="default"/>) when it should be "2006/12/xmlc14n11#" (i.e., the "12" inside "xmlc12n11" should have been "14"). This is[Err3965]<xref target="Err3965" format="default"/> and is corrected in this document.</t> </list> </t></li> </ul> <t>2007/05/xmldsig-more#rsa-sha224<list> <t>Appears</t> <ul empty="true" spacing="normal"> <li>Appears in the indices(<xref target="sect-4.1"/>(Sections <xref section="4.1" sectionFormat="bare" target="RFC6931"/> and4.2] of<xref section="4.2" sectionFormat="bare" target="RFC6931"/> of <xref target="RFC6931" format="default"/>) when it should be "2001/04/xmldsig-more#rsa-sha224". This is[Err4004]<xref target="Err4004" format="default"/> and is corrected in thisdocument.</t> </list> </t>document.</li> </ul> </section> <sectiontitle="Change History" anchor="sect-c"> <figure><artwork><![CDATA[ RFC Editor Note: Please delete this Appendix before publication. -00 to -01 to -02 to -03 to -04 to -05 to -06 to -07 to -08 Bump up version and date to keep draft alive as a place where new URIs can be accumulated. At some point in here, author address was updated. -08 to -09 to -10 Update author affiliation and references. -10 to -11 Update author address. -11 to -12 Bump up version and date to keep draft alive. -12 to -13 Numerous editorial/typo fixes thanks to Gayle Noble who is added toanchor="acknowledgements" numbered="false"> <name>Acknowledgements</name> <t>The contributions of theacknowledgements section. -13 to -14 Numerous additional algorithms almost all as requestedfollowing, listed in alphabetic order, byPimreporting errata against <xref target="RFC6931"/> or contributing to this document, are gratefully acknowledged:</t> <t indent="3"> <contact fullname="Roman Danyliw"/>, <contact fullname="Pim van derEijk who is added to the acknowledgements section. Update and add references. -14 to -15 Add URLs for ECDSA with SHA3, SipHash-2-4, X25519, XMSS and XMSSMT. Add RFC reference 5869 for HKDF but not yet added elsewhere in the document. -15 to -16 Fix text for ChaCha20 to include the required Nonce and Counter inputs. Add ChaCha20+Poly1305 AEAD algorithm. Add HKDF key derivation function. -16 to -17 Mostly editorial fixes. -17 to -18 Resolve AD review comments. Globally replace "byte" with "octet". Update reference to "US National InstituteEijk"/>, <contact fullname="Frederick Hirsch"/>, <contact fullname="Benjamin Kaduk"/>, <contact fullname="Alexey Melnikov"/>, <contact fullname="Gayle Noble"/>, <contact fullname="Axel Puhlmann"/>, <contact fullname= "Juraj Somorovsky"/>, <contact fullname="Peter Yee"/>, and <contact fullname="Annie Yousar"/>. </t> <t> The contributions ofStandards and Technology, "SHA-3 WINNER", February 2013" to reference [FIPS202]. -18 to -19 Resolve GENART review comments. -19 to -20 to -21 Minor Editorial improvements. -21 to -22 Fix typos. -22 to -23 Resolve IESG Discuss and Comments. -23 to -24 Minor fixes to 2.2.6 re XMSS & XMSSMT. -24 to -25 AddtheX448 key agreement algorithm so 2.7.1 as approved by IESG and sponsoring AD. -25 to -26 Fix typosfollowing, listed inURL for X448. -26alphabetic order, to-27 Fix typos. Add more explanatory text and re-order URIs for XMSS and XMSSMT. Add 512 bit XMSSMT versions. ]]></artwork> </figure><xref target="RFC6931"/>, on which this document is based, are gratefully acknowledged: </t> <t indent="3"> <contact fullname="Benoit Claise"/>, <contact fullname="Adrian Farrel"/>, <contact fullname="Stephen Farrell"/>, <contact fullname="Ernst Giessmann"/>, <contact fullname="Frederick Hirsch"/>, <contact fullname="Björn Höhrmann"/>, <contact fullname="Russ Housley"/>, <contact fullname="Satoru Kanno"/>, <contact fullname="Charlie Kaufman"/>, <contact fullname="Konrad Lanz"/>, <contact fullname="HwanJin Lee"/>, <contact fullname="Barry Leiba"/>, <contact fullname="Peter Lipp"/>, <contact fullname="Subramanian Moonesamy"/>, <contact fullname="Thomas Roessler"/>, <contact fullname="Hanseong Ryu"/>, <contact fullname="Peter Saint-Andre"/>, and <contact fullname="Sean Turner"/>. </t> <t> The following contributors to RFC 4051 are gratefully acknowledged: </t> <t indent="3"> <contact fullname="Glenn Adams"/>, <contact fullname="Joel Halpern"/>, <contact fullname="Russ Housley"/>, <contact fullname="Merlin Hughs"/>, <contact fullname="Gregor Karlinger"/>, <contact fullname="Brian LaMachia"/>, <contact fullname="Shiho Moriai"/>, and <contact fullname="Joseph Reagle"/>.</t> </section> </back> </rfc>