rfc5843.xml

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<!DOCTYPE rfc
  PUBLIC "" "rfc2629.dtd">
<rfc number="5843" category="info" ipr="trust200902">
    <front>        
      <title abbrev="More Algorithms for HTTP Instance Digests">Additional Hash Algorithms for HTTP Instance Digests</title>
      <author initials="A." surname="Bryan" fullname="Anthony Bryan">
	    <organization></organization>
	    <address>
		  <postal>
			<street></street>
		    <city>Pompano Beach</city>
			<region>FL</region>
			<country>USA</country>
		  </postal>
	      <email>anthonybryan@gmail.com</email>	
	      <uri>http://www.metalinker.org</uri>		
	    </address>
      </author>
	<date month="April" year="2010"/>        

<!-- [rfced] Please insert any keywords (beyond those that appear in
the title) for use on http://www.rfc-editor.org/rfcsearch.html. Hypertext Transfer Protocol (HTTP) Digest Algorithm Values registry update-->

      <abstract>
	<t>The IANA registry named "Hypertext Transfer Protocol (HTTP) Digest Algorithm Values" defines values for digest algorithms used by Instance Digests in HTTP. Instance Digests in HTTP provide a digest, also known as a checksum or hash, of an entire representation of the current state of a
   resource. This document adds new values to the registry and updates previous values.
</t>
      </abstract>    
	  
  </front>    

  <middle>
    <section title="Introduction">
      <t>The IANA registry named "Hypertext Transfer Protocol (HTTP) Digest Algorithm Values" defines values for digest algorithms used by Instance Digests in HTTP.</t>
	  
	  <t>Note: This is unrelated to HTTP Digest Authentication. Instance Digests in HTTP provide a digest, also known as a checksum or hash, of an entire representation of the current state of a
   resource.</t>
	  <t>The registry was created by <xref target="RFC3230"/> in 2002. This document adds new values to the registry and updates previous values that had redundant or outdated references.</t> 


      <section title="Example"><t><figure> 
	  <preamble>Example of Instance Digest for SHA-256:</preamble>

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	  <artwork type="example">
Digest: SHA-256=MWVkMWQxYTRiMzk5MDQ0MzI3NGU5NDEyZTk5OWY1ZGFmNzgyZTJlO
DYzYjRjYzFhOTlmNTQwYzI2M2QwM2U2MQ==
</artwork></figure></t>
      </section> 

    </section>

	<section title="IANA Considerations" anchor="IANA">
	<t>This document makes use of the IANA registry named "Hypertext Transfer Protocol (HTTP) Digest Algorithm Values" specified in <xref target="RFC3230"/>.</t>
<section title="Previous Registrations Updated">

	<t>Accordingly, IANA has updated the following registrations:</t>
   <t><list>
   <t>Digest Algorithm: MD5</t>
   <t>Description: The MD5 algorithm, as specified in
   <xref target="RFC1321"/>. The output of this algorithm is encoded
   using the base64 encoding <xref target="RFC4648"/>.</t>
   <t>Reference: <xref target="RFC1321"/>, <xref target="RFC4648"/>,
   this document.</t>
   </list></t>

   <t><list>   
   <t>Digest Algorithm: SHA</t>
   <t>Description: The SHA-1 algorithm
   <xref target="FIPS-180-3"/>. The output of this algorithm is
   encoded using the base64 encoding <xref target="RFC4648"/>.</t>
   <t>Reference: <xref target="FIPS-180-3"/>, <xref target="RFC4648"/>,
   this document.</t>
   </list></t>

</section>
<section title="New Registrations">
	<t>Accordingly, IANA has made the following registrations:</t>

   <t><list>   
   <t>Digest Algorithm: SHA-256</t>
   <t>Description: The SHA-256 algorithm <xref target="FIPS-180-3"/>. The output of this algorithm is encoded using the base64 encoding <xref target="RFC4648"/>.</t>
   <t>Reference: <xref target="FIPS-180-3"/>, <xref target="RFC4648"/>,
   this document.</t>
   </list></t>
    
   <t><list>
   <t>Digest Algorithm: SHA-512</t>
   <t>Description: The SHA-512 algorithm <xref target="FIPS-180-3"/>. The output of this algorithm is encoded using the base64 encoding <xref target="RFC4648"/>.</t>
   <t>Reference: <xref target="FIPS-180-3"/>, <xref target="RFC4648"/>,
   this document.</t>   
   </list></t>
</section>
   
	</section>


	
	  <section title="Security Considerations">

        <t>Same as <xref target="RFC3230"/>.</t>
		
	  </section>
	  
	  <section title="Changes Compared to RFC 3230">
	    <t>The reference for base64 encoding has been updated for both MD5 and SHA.</t>
		<t>The reference for SHA has been updated.</t>
        <t>The SHA-256 and SHA-512 algorithms have been added to the registry.</t>		
	    <t>All other previous values to the registry are still valid.</t>
	  </section>

	</middle> 

	<back> 
	  
	  <references title="Normative References">

<reference anchor="RFC1321">

<front>
<title>The MD5 Message-Digest Algorithm</title>
<author initials="R." surname="Rivest" fullname="R. Rivest">
<organization/></author>
<date year="1992" month="April"/></front>

<seriesInfo name="RFC" value="1321"/>
</reference>

<reference anchor="RFC3230">

<front>
<title>Instance Digests in HTTP</title>
<author initials="J." surname="Mogul" fullname="J. Mogul">
<organization/></author>
<author initials="A." surname="Van Hoff" fullname="A. Van Hoff">
<organization/></author>
<date year="2002" month="January"/></front>

<seriesInfo name="RFC" value="3230"/>
</reference>

<reference anchor="RFC4648">

<front>
<title>The Base16, Base32, and Base64 Data Encodings</title>
<author initials="S." surname="Josefsson" fullname="S. Josefsson">
<organization/></author>
<date year="2006" month="October"/></front>

<seriesInfo name="RFC" value="4648"/>
</reference>


<reference anchor="FIPS-180-3">
<front>
<title>Secure Hash Standard (SHS)</title>
<author>
    <organization>National Institute of Standards and Technology (NIST)</organization>
</author>
<date year="2008" month="October"></date>
</front>
<seriesInfo name="FIPS PUB" value="180-3"></seriesInfo>
</reference>



	  </references>
	  

		
	    <section title="Acknowledgements and Contributors">
		  <t>Thanks to Mark Nottingham, Eran Hammer-Lahav, Nils Maier, Lisa Dusseault, Alfred Hoenes, Pasi Eronen, Gonzalo Camarillo, Radia Perlman, and Jeffrey Mogul.</t>
    </section>

	   
	  </back> 
	</rfc>