<!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>krb5_pac_verify - Verify a PAC. — 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: '1.18.2',
COLLAPSE_INDEX: false,
FILE_SUFFIX: '.html',
HAS_SOURCE: true,
SOURCELINK_SUFFIX: '.txt'
};
</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="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="krb5_pac_verify_ext - Verify a PAC, possibly from a specified realm." href="krb5_pac_verify_ext.html" />
<link rel="prev" title="krb5_pac_sign_ext - Sign a PAC, possibly with a specified realm." href="krb5_pac_sign_ext.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="krb5_pac_sign_ext.html" title="krb5_pac_sign_ext - Sign a PAC, possibly with a specified realm."
accesskey="P">previous</a> |
<a href="krb5_pac_verify_ext.html" title="krb5_pac_verify_ext - Verify a PAC, possibly from a specified realm."
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__krb5_pac_verify - Verify a PAC.">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">
<div class="section" id="krb5-pac-verify-verify-a-pac">
<h1>krb5_pac_verify - Verify a PAC.<a class="headerlink" href="#krb5-pac-verify-verify-a-pac" title="Permalink to this headline">¶</a></h1>
<dl class="function">
<dt id="c.krb5_pac_verify">
<a class="reference internal" href="../types/krb5_error_code.html#c.krb5_error_code" title="krb5_error_code">krb5_error_code</a> <code class="descname">krb5_pac_verify</code><span class="sig-paren">(</span><a class="reference internal" href="../types/krb5_context.html#c.krb5_context" title="krb5_context">krb5_context</a><em> context</em>, const <a class="reference internal" href="../types/krb5_pac.html#c.krb5_pac" title="krb5_pac">krb5_pac</a><em> pac</em>, <a class="reference internal" href="../types/krb5_timestamp.html#c.krb5_timestamp" title="krb5_timestamp">krb5_timestamp</a><em> authtime</em>, <a class="reference internal" href="../types/krb5_const_principal.html#c.krb5_const_principal" title="krb5_const_principal">krb5_const_principal</a><em> principal</em>, const <a class="reference internal" href="../types/krb5_keyblock.html#c.krb5_keyblock" title="krb5_keyblock">krb5_keyblock</a> *<em> server</em>, const <a class="reference internal" href="../types/krb5_keyblock.html#c.krb5_keyblock" title="krb5_keyblock">krb5_keyblock</a> *<em> privsvr</em><span class="sig-paren">)</span><a class="headerlink" href="#c.krb5_pac_verify" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">param:</th><td class="field-body"><p class="first"><strong>[in]</strong> <strong>context</strong> - Library context</p>
<p><strong>[in]</strong> <strong>pac</strong> - PAC handle</p>
<p><strong>[in]</strong> <strong>authtime</strong> - Expected timestamp</p>
<p><strong>[in]</strong> <strong>principal</strong> - Expected principal name (or NULL)</p>
<p><strong>[in]</strong> <strong>server</strong> - Key to validate server checksum (or NULL)</p>
<p class="last"><strong>[in]</strong> <strong>privsvr</strong> - Key to validate KDC checksum (or NULL)</p>
</td>
</tr>
</tbody>
</table>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">retval:</th><td class="field-body"><ul class="first last simple">
<li>0 Success; otherwise - Kerberos error codes</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>This function validates <em>pac</em> against the supplied <em>server</em> , <em>privsvr</em> , <em>principal</em> and <em>authtime</em> . If <em>principal</em> is NULL, the principal and authtime are not verified. If <em>server</em> or <em>privsvr</em> is NULL, the corresponding checksum is not verified.</p>
<p>If successful, <em>pac</em> is marked as verified.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">A checksum mismatch can occur if the PAC was copied from a cross-realm TGT by an ignorant KDC; also macOS Server Open Directory (as of 10.6) generates PACs with no server checksum at all. One should consider not failing the whole authentication because of this reason, but, instead, treating the ticket as if it did not contain a PAC or marking the PAC information as non-verified.</p>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="sidebar">
<h2>On this page</h2>
<ul>
<li><a class="reference internal" href="#">krb5_pac_verify - Verify a PAC.</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"><a class="reference internal" href="../../y2038.html">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 current"><a class="reference internal" href="../index.html">Complete reference - API and datatypes</a><ul class="current">
<li class="toctree-l3 current"><a class="reference internal" href="index.html">krb5 API</a></li>
<li class="toctree-l3"><a class="reference internal" href="../types/index.html">krb5 types and structures</a></li>
<li class="toctree-l3"><a class="reference internal" href="../macros/index.html">krb5 simple macros</a></li>
</ul>
</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: 1.18.2</i><br />
© <a href="../../../copyright.html">Copyright</a> 1985-2020, MIT.
</div>
<div class="left">
<a href="../../../index.html" title="Full Table of Contents"
>Contents</a> |
<a href="krb5_pac_sign_ext.html" title="krb5_pac_sign_ext - Sign a PAC, possibly with a specified realm."
>previous</a> |
<a href="krb5_pac_verify_ext.html" title="krb5_pac_verify_ext - Verify a PAC, possibly from a specified realm."
>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__krb5_pac_verify - Verify a PAC.">feedback</a>
</div>
</div>
</div>
</body>
</html>