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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>6.13. pam_keyinit - display the keyinit file</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><link rel="home" href="Linux-PAM_SAG.html" title="The Linux-PAM System Administrators' Guide"><link rel="up" href="sag-module-reference.html" title="Chapter 6. A reference guide for available modules"><link rel="prev" href="sag-pam_issue.html" title="6.12. pam_issue - add issue file to user prompt"><link rel="next" href="sag-pam_lastlog.html" title="6.14. pam_lastlog - display date of last login"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">6.13. pam_keyinit - display the keyinit file</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sag-pam_issue.html">Prev</a> </td><th width="60%" align="center">Chapter 6. A reference guide for available modules</th><td width="20%" align="right"> <a accesskey="n" href="sag-pam_lastlog.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sag-pam_keyinit"></a>6.13. pam_keyinit - display the keyinit file</h2></div></div></div><div class="cmdsynopsis"><p><code class="command">pam_keyinit.so</code>  [
	debug
      ] [
	force
      ] [
	revoke
      ]</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_keyinit-description"></a>6.13.1. DESCRIPTION</h3></div></div></div><p>
      The pam_keyinit PAM module ensures that the invoking process has a
      session keyring other than the user default session keyring.
    </p><p>
      The session component of the module checks to see if the process's
      session keyring is the user default, and, if it is, creates a new
      anonymous session keyring with which to replace it.
    </p><p>
      If a new session keyring is created, it will install a link to the user
      common keyring in the session keyring so that keys common to the user
      will be automatically accessible through it.
    </p><p>
      The session keyring of the invoking process will thenceforth be inherited
      by all its children unless they override it.
    </p><p>
      This module is intended primarily for use by login processes.  Be aware
      that after the session keyring has been replaced, the old session keyring
      and the keys it contains will no longer be accessible.
    </p><p>
      This module should not, generally, be invoked by programs like
      <span class="emphasis"><em>su</em></span>, since it is usually desirable for the
      key set to percolate through to the alternate context.  The keys have
      their own permissions system to manage this.
    </p><p>
      This module should be included as early as possible in a PAM
      configuration, so that other PAM modules can attach tokens to the
      keyring.
    </p><p>
      The keyutils package is used to manipulate keys more directly.  This
      can be obtained from:
    </p><p>
      <a class="ulink" href="http://people.redhat.com/~dhowells/keyutils/" target="_top">
	Keyutils
      </a>
    </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_keyinit-options"></a>6.13.2. OPTIONS</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">
          <code class="option">debug</code>
        </span></dt><dd><p>
            Log debug information with <span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span>.
          </p></dd><dt><span class="term">
          <code class="option">force</code>
        </span></dt><dd><p>
	    Causes the session keyring of the invoking process to be replaced
	    unconditionally.
          </p></dd><dt><span class="term">
          <code class="option">revoke</code>
        </span></dt><dd><p>
	    Causes the session keyring of the invoking process to be revoked
	    when the invoking process exits if the session keyring was created
	    for this process in the first place.
          </p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_keyinit-types"></a>6.13.3. MODULE TYPES PROVIDED</h3></div></div></div><p>
      Only the <code class="option">session</code> module type is provided.
    </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_keyinit-return_values"></a>6.13.4. RETURN VALUES</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">PAM_SUCCESS</span></dt><dd><p>
	    This module will usually return this value
	  </p></dd><dt><span class="term">PAM_AUTH_ERR</span></dt><dd><p>
             Authentication failure.
          </p></dd><dt><span class="term">PAM_BUF_ERR</span></dt><dd><p>
             Memory buffer error.
          </p></dd><dt><span class="term">PAM_IGNORE</span></dt><dd><p>
            The return value should be ignored by PAM dispatch.
          </p></dd><dt><span class="term">PAM_SERVICE_ERR</span></dt><dd><p>
	    Cannot determine the user name.
          </p></dd><dt><span class="term">PAM_SESSION_ERR</span></dt><dd><p>
	    This module will return this value if its arguments are invalid or
	    if a system error such as ENOMEM occurs.
	  </p></dd><dt><span class="term">PAM_USER_UNKNOWN</span></dt><dd><p>
            User not known.
          </p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_keyinit-examples"></a>6.13.5. EXAMPLES</h3></div></div></div><p>
      Add this line to your login entries to start each login session with its
      own session keyring:
      </p><pre class="programlisting">
session  required  pam_keyinit.so
      </pre><p>
    </p><p>
      This will prevent keys from one session leaking into another session for
      the same user.
    </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_keyinit-author"></a>6.13.6. AUTHOR</h3></div></div></div><p>
        pam_keyinit was written by David Howells, <dhowells@redhat.com>.
      </p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sag-pam_issue.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sag-module-reference.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sag-pam_lastlog.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">6.12. pam_issue - add issue file to user prompt </td><td width="20%" align="center"><a accesskey="h" href="Linux-PAM_SAG.html">Home</a></td><td width="40%" align="right" valign="top"> 6.14. pam_lastlog - display date of last login</td></tr></table></div></body></html>