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diff --git a/doc/html/appdev/y2038.html b/doc/html/appdev/y2038.html new file mode 100644 index 000000000000..9b5959cb4497 --- /dev/null +++ b/doc/html/appdev/y2038.html @@ -0,0 +1,165 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> + + +<html xmlns="http://www.w3.org/1999/xhtml"> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> + + <title>Year 2038 considerations for uses of krb5_timestamp — MIT Kerberos Documentation</title> + + <link rel="stylesheet" href="../_static/agogo.css" type="text/css" /> + <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> + <link rel="stylesheet" href="../_static/kerb.css" type="text/css" /> + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT: '../', + VERSION: '1.16', + COLLAPSE_INDEX: false, + FILE_SUFFIX: '.html', + HAS_SOURCE: true + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + <link rel="author" title="About these documents" href="../about.html" /> + <link rel="copyright" title="Copyright" href="../copyright.html" /> + <link rel="top" title="MIT Kerberos Documentation" href="../index.html" /> + <link rel="up" title="For application developers" href="index.html" /> + <link rel="next" title="Differences between Heimdal and MIT Kerberos API" href="h5l_mit_apidiff.html" /> + <link rel="prev" title="Developing with GSSAPI" href="gssapi.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="gssapi.html" title="Developing with GSSAPI" + accesskey="P">previous</a> | + <a href="h5l_mit_apidiff.html" title="Differences between Heimdal and MIT Kerberos API" + 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__Year 2038 considerations for uses of krb5_timestamp">feedback</a> + </div> + </div> + </div> + + <div class="content-wrapper"> + <div class="content"> + <div class="document"> + + <div class="documentwrapper"> + <div class="bodywrapper"> + <div class="body"> + + <div class="section" id="year-2038-considerations-for-uses-of-krb5-timestamp"> +<h1>Year 2038 considerations for uses of krb5_timestamp<a class="headerlink" href="#year-2038-considerations-for-uses-of-krb5-timestamp" title="Permalink to this headline">ΒΆ</a></h1> +<p>POSIX time values, which measure the number of seconds since January 1 +1970, will exceed the maximum value representable in a signed 32-bit +integer in January 2038. This documentation describes considerations +for consumers of the MIT krb5 libraries.</p> +<p>Applications or libraries which use libkrb5 and consume the timestamps +included in credentials or other structures make use of the +<a class="reference internal" href="refs/types/krb5_timestamp.html#c.krb5_timestamp" title="krb5_timestamp"><tt class="xref c c-type docutils literal"><span class="pre">krb5_timestamp</span></tt></a> type. For historical reasons, krb5_timestamp +is a signed 32-bit integer, even on platforms where a larger type is +natively used to represent time values. To behave properly for time +values after January 2038, calling code should cast krb5_timestamp +values to uint32_t, and then to time_t:</p> +<div class="highlight-python"><div class="highlight"><pre>(time_t)(uint32_t)timestamp +</pre></div> +</div> +<p>Used in this way, krb5_timestamp values can represent time values up +until February 2106, provided that the platform uses a 64-bit or +larger time_t type. This usage will also remain safe if a later +version of MIT krb5 changes krb5_timestamp to an unsigned 32-bit +integer.</p> +<p>The GSSAPI only uses representations of time intervals, not absolute +times. Callers of the GSSAPI should require no changes to behave +correctly after January 2038, provided that they use MIT krb5 release +1.16 or later.</p> +</div> + + + </div> + </div> + </div> + </div> + <div class="sidebar"> + <h2>On this page</h2> + <ul> +<li><a class="reference internal" href="#">Year 2038 considerations for uses of krb5_timestamp</a></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 current"><a class="reference internal" href="index.html">For application developers</a><ul class="current"> +<li class="toctree-l2"><a class="reference internal" href="gssapi.html">Developing with GSSAPI</a></li> +<li class="toctree-l2 current"><a class="current reference internal" href="">Year 2038 considerations for uses of krb5_timestamp</a></li> +<li class="toctree-l2"><a class="reference internal" href="h5l_mit_apidiff.html">Differences between Heimdal and MIT Kerberos API</a></li> +<li class="toctree-l2"><a class="reference internal" href="init_creds.html">Initial credentials</a></li> +<li class="toctree-l2"><a class="reference internal" href="princ_handle.html">Principal manipulation and parsing</a></li> +<li class="toctree-l2"><a class="reference internal" href="refs/index.html">Complete reference - API and datatypes</a></li> +</ul> +</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"><a class="reference internal" href="../formats/index.html">Protocols and file formats</a></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: 1.16</i><br /> + © <a href="../copyright.html">Copyright</a> 1985-2017, MIT. + </div> + <div class="left"> + + <a href="../index.html" title="Full Table of Contents" + >Contents</a> | + <a href="gssapi.html" title="Developing with GSSAPI" + >previous</a> | + <a href="h5l_mit_apidiff.html" title="Differences between Heimdal and MIT Kerberos API" + >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__Year 2038 considerations for uses of krb5_timestamp">feedback</a> + </div> + </div> + </div> + + </body> +</html>
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