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diff --git a/crypto/krb5/doc/html/formats/cookie.html b/crypto/krb5/doc/html/formats/cookie.html deleted file mode 100644 index e5f148c4758c..000000000000 --- a/crypto/krb5/doc/html/formats/cookie.html +++ /dev/null @@ -1,229 +0,0 @@ -<!DOCTYPE html> - -<html lang="en" data-content_root="../"> - <head> - <meta charset="utf-8" /> - <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" /> - - <title>KDC cookie format — MIT Kerberos Documentation</title> - <link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=fa44fd50" /> - <link rel="stylesheet" type="text/css" href="../_static/agogo.css?v=879f3c71" /> - <link rel="stylesheet" type="text/css" href="../_static/kerb.css?v=6a0b3979" /> - <script src="../_static/documentation_options.js?v=236fef3b"></script> - <script src="../_static/doctools.js?v=888ff710"></script> - <script src="../_static/sphinx_highlight.js?v=dc90522c"></script> - <link rel="author" title="About these documents" href="../about.html" /> - <link rel="index" title="Index" href="../genindex.html" /> - <link rel="search" title="Search" href="../search.html" /> - <link rel="copyright" title="Copyright" href="../copyright.html" /> - <link rel="next" title="PKINIT freshness tokens" href="freshness_token.html" /> - <link rel="prev" title="Replay cache file format" href="rcache_file_format.html" /> - </head><body> - <div class="header-wrapper"> - <div class="header"> - - - <h1><a href="../index.html">MIT Kerberos Documentation</a></h1> - - <div class="rel"> - - <a href="../index.html" title="Full Table of Contents" - accesskey="C">Contents</a> | - <a href="rcache_file_format.html" title="Replay cache file format" - accesskey="P">previous</a> | - <a href="freshness_token.html" title="PKINIT freshness tokens" - accesskey="N">next</a> | - <a href="../genindex.html" title="General Index" - accesskey="I">index</a> | - <a href="../search.html" title="Enter search criteria" - accesskey="S">Search</a> | - <a href="mailto:krb5-bugs@mit.edu?subject=Documentation__KDC cookie format">feedback</a> - </div> - </div> - </div> - - <div class="content-wrapper"> - <div class="content"> - <div class="document"> - - <div class="documentwrapper"> - <div class="bodywrapper"> - <div class="body" role="main"> - - <section id="kdc-cookie-format"> -<h1>KDC cookie format<a class="headerlink" href="#kdc-cookie-format" title="Link to this heading">¶</a></h1> -<p><span class="target" id="index-0"></span><a class="rfc reference external" href="https://datatracker.ietf.org/doc/html/rfc6113.html"><strong>RFC 6113</strong></a> section 5.2 specifies a pa-data type PA-FX-COOKIE, which -clients are required to reflect back to the KDC during -pre-authentication. The MIT krb5 KDC uses the following formats for -cookies.</p> -<section id="trivial-cookie-version-0"> -<h2>Trivial cookie (version 0)<a class="headerlink" href="#trivial-cookie-version-0" title="Link to this heading">¶</a></h2> -<p>If there is no pre-authentication mechanism state information to save, -a trivial cookie containing the value “MIT” is used. A trivial cookie -is needed to indicate that the conversation can continue.</p> -</section> -<section id="secure-cookie-version-1"> -<h2>Secure cookie (version 1)<a class="headerlink" href="#secure-cookie-version-1" title="Link to this heading">¶</a></h2> -<p>In release 1.14 and later, a secure cookie can be sent if there is any -mechanism state to save for the next request. A secure cookie -contains the concatenation of the following:</p> -<ul class="simple"> -<li><p>the four bytes “MIT1”</p></li> -<li><p>a four-byte big-endian kvno value</p></li> -<li><p>an <span class="target" id="index-1"></span><a class="rfc reference external" href="https://datatracker.ietf.org/doc/html/rfc3961.html"><strong>RFC 3961</strong></a> ciphertext</p></li> -</ul> -<p>The ciphertext is encrypted in the cookie key with key usage -number 513. The cookie key is derived from a key in the local krbtgt -principal entry for the realm (e.g. <code class="docutils literal notranslate"><span class="pre">krbtgt/KRBTEST.COM@KRBTEST.COM</span></code> -if the request is to the <code class="docutils literal notranslate"><span class="pre">KRBTEST.COM</span></code> realm). The first krbtgt key -for the indicated kvno value is combined with the client principal as -follows:</p> -<div class="highlight-abnf notranslate"><div class="highlight"><pre><span></span><span class="nc">cookie-key</span><span class="w"> </span><-<span class="w"> </span><span class="nc">random-to-key</span><span class="p">(</span><span class="nc">PRF</span>+<span class="p">(</span><span class="nc">tgt-key</span>,<span class="w"> </span><span class="l">"COOKIE"</span><span class="w"> </span>|<span class="w"> </span><span class="nc">client-princ</span><span class="p">))</span> -</pre></div> -</div> -<p>where <strong>random-to-key</strong> is the <span class="target" id="index-2"></span><a class="rfc reference external" href="https://datatracker.ietf.org/doc/html/rfc3961.html"><strong>RFC 3961</strong></a> random-to-key operation for -the krbtgt key’s encryption type, <strong>PRF+</strong> is defined in <span class="target" id="index-3"></span><a class="rfc reference external" href="https://datatracker.ietf.org/doc/html/rfc6113.html"><strong>RFC 6113</strong></a>, -and <code class="docutils literal notranslate"><span class="pre">|</span></code> denotes concatenation. <em>client-princ</em> is the request client -principal name with realm, marshalled according to <span class="target" id="index-4"></span><a class="rfc reference external" href="https://datatracker.ietf.org/doc/html/rfc1964.html"><strong>RFC 1964</strong></a> section -2.1.1.</p> -<p>The plain text of the encrypted part of a cookie is the DER encoding -of the following ASN.1 type:</p> -<div class="highlight-bnf notranslate"><div class="highlight"><pre><span></span>SecureCookie <span class="o">::=</span> SEQUENCE { - time INTEGER, - data SEQUENCE OF PA-DATA, - ... -} -</pre></div> -</div> -<p>The time field represents the cookie creation time; for brevity, it is -encoded as an integer giving the POSIX timestamp rather than as an -ASN.1 GeneralizedTime value. The data field contains one element for -each pre-authentication type which requires saved state. For -mechanisms which have separate request and reply types, the request -type is used; this allows the KDC to determine whether a cookie is -relevant to a request by comparing the request pa-data types to the -cookie data types.</p> -</section> -<section id="spake-cookie-format-version-1"> -<h2>SPAKE cookie format (version 1)<a class="headerlink" href="#spake-cookie-format-version-1" title="Link to this heading">¶</a></h2> -<p>Inside the SecureCookie wrapper, a data value of type 151 contains -state for SPAKE pre-authentication. This data has the following -binary format with big-endian integer encoding:</p> -<div class="highlight-bnf notranslate"><div class="highlight"><pre><span></span>cookie <span class="o">::=</span> - version (16 bits) [with the value 1] - stage number (16 bits) - group number (32 bits) - SPAKE value length (32 bits) - SPAKE value - transcript hash length (32 bits) - transcript hash - second factor record 1 (factor-record) - second factor record 2 (factor-record) - ... - -factor-record <span class="o">::=</span> - second factor type (32 bits) - second factor data length (32 bits) - second factor data -</pre></div> -</div> -<p>The stage value is 0 if the cookie was sent with a challenge message. -Otherwise it is 1 for the first encdata message sent by the KDC during -an exchange, 2 for the second, etc..</p> -<p>The group value indicates the group number used in the SPAKE challenge.</p> -<p>For a stage-0 cookie, the SPAKE value is the KDC private key, -represented in the scalar marshalling form of the group. For other -cookies, the SPAKE value is the SPAKE result K, represented in the -group element marshalling form.</p> -<p>For a stage-0 cookie, the transcript hash is the intermediate hash -after updating with the client support message (if one was sent) and -challenge. For other cookies it is the final hash.</p> -<p>For a stage-0 cookie, there may be any number of second-factor -records, including none; a second-factor type need not create a state -field if it does not need one, and no record is created for SF-NONE. -For other cookies, there must be exactly one second-factor record -corresponding to the factor type chosen by the client.</p> -</section> -</section> - - - <div class="clearer"></div> - </div> - </div> - </div> - </div> - <div class="sidebar"> - - <h2>On this page</h2> - <ul> -<li><a class="reference internal" href="#">KDC cookie format</a><ul> -<li><a class="reference internal" href="#trivial-cookie-version-0">Trivial cookie (version 0)</a></li> -<li><a class="reference internal" href="#secure-cookie-version-1">Secure cookie (version 1)</a></li> -<li><a class="reference internal" href="#spake-cookie-format-version-1">SPAKE cookie format (version 1)</a></li> -</ul> -</li> -</ul> - - <br/> - <h2>Table of contents</h2> - <ul class="current"> -<li class="toctree-l1"><a class="reference internal" href="../user/index.html">For users</a></li> -<li class="toctree-l1"><a class="reference internal" href="../admin/index.html">For administrators</a></li> -<li class="toctree-l1"><a class="reference internal" href="../appdev/index.html">For application developers</a></li> -<li class="toctree-l1"><a class="reference internal" href="../plugindev/index.html">For plugin module developers</a></li> -<li class="toctree-l1"><a class="reference internal" href="../build/index.html">Building Kerberos V5</a></li> -<li class="toctree-l1"><a class="reference internal" href="../basic/index.html">Kerberos V5 concepts</a></li> -<li class="toctree-l1 current"><a class="reference internal" href="index.html">Protocols and file formats</a><ul class="current"> -<li class="toctree-l2"><a class="reference internal" href="ccache_file_format.html">Credential cache file format</a></li> -<li class="toctree-l2"><a class="reference internal" href="keytab_file_format.html">Keytab file format</a></li> -<li class="toctree-l2"><a class="reference internal" href="rcache_file_format.html">Replay cache file format</a></li> -<li class="toctree-l2 current"><a class="current reference internal" href="#">KDC cookie format</a></li> -<li class="toctree-l2"><a class="reference internal" href="freshness_token.html">PKINIT freshness tokens</a></li> -<li class="toctree-l2"><a class="reference internal" href="database_formats.html">Kerberos Database (KDB) Formats</a></li> -</ul> -</li> -<li class="toctree-l1"><a class="reference internal" href="../mitK5features.html">MIT Kerberos features</a></li> -<li class="toctree-l1"><a class="reference internal" href="../build_this.html">How to build this documentation from the source</a></li> -<li class="toctree-l1"><a class="reference internal" href="../about.html">Contributing to the MIT Kerberos Documentation</a></li> -<li class="toctree-l1"><a class="reference internal" href="../resources.html">Resources</a></li> -</ul> - - <br/> - <h4><a href="../index.html">Full Table of Contents</a></h4> - <h4>Search</h4> - <form class="search" action="../search.html" method="get"> - <input type="text" name="q" size="18" /> - <input type="submit" value="Go" /> - <input type="hidden" name="check_keywords" value="yes" /> - <input type="hidden" name="area" value="default" /> - </form> - - </div> - <div class="clearer"></div> - </div> - </div> - - <div class="footer-wrapper"> - <div class="footer" > - <div class="right" ><i>Release: 1.22-final</i><br /> - © <a href="../copyright.html">Copyright</a> 1985-2025, MIT. - </div> - <div class="left"> - - <a href="../index.html" title="Full Table of Contents" - >Contents</a> | - <a href="rcache_file_format.html" title="Replay cache file format" - >previous</a> | - <a href="freshness_token.html" title="PKINIT freshness tokens" - >next</a> | - <a href="../genindex.html" title="General Index" - >index</a> | - <a href="../search.html" title="Enter search criteria" - >Search</a> | - <a href="mailto:krb5-bugs@mit.edu?subject=Documentation__KDC cookie format">feedback</a> - </div> - </div> - </div> - - </body> -</html>
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