[b4b71892] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[b4b71892] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[1ae6204] | 7 | <!ENTITY linux-pam-download-http "https://fedorahosted.org/releases/l/i/linux-pam/Linux-PAM-&linux-pam-version;.tar.bz2">
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| 8 | <!ENTITY linux-pam-download-ftp " ">
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| 9 | <!ENTITY linux-pam-md5sum "927ee5585bdec5256c75117e9348aa47">
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[a263ccb3] | 10 | <!ENTITY linux-pam-size "1.1 MB">
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[1ae6204] | 11 | <!ENTITY linux-pam-buildsize "28 MB (includes installing the optional documentation)">
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| 12 | <!ENTITY linux-pam-time "0.3 SBU">
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[903f671] | 13 |
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[1ae6204] | 14 | <!ENTITY linux-pam-docs-download "https://fedorahosted.org/releases/l/i/linux-pam/Linux-PAM-&linux-pam-version;-docs.tar.bz2">
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| 15 | <!ENTITY linux-pam-docs-md5sum "987e14ddce375ec7ddd2b91fbc2bd46d">
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| 16 | <!ENTITY linux-pam-docs-size "487 KB">
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| 17 | <!ENTITY debian-pam-docs "http://debian.securedservers.com/kernel/pub/linux/libs/pam">
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[b4b71892] | 18 | ]>
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| 19 |
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[6603f8b] | 20 | <sect1 id="linux-pam" xreflabel="Linux-PAM-&linux-pam-version;">
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| 21 | <?dbhtml filename="linux-pam.html"?>
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[c7eb655] | 22 |
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| 23 | <sect1info>
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| 24 | <othername>$LastChangedBy$</othername>
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| 25 | <date>$Date$</date>
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| 26 | </sect1info>
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| 27 |
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[6603f8b] | 28 | <title>Linux-PAM-&linux-pam-version;</title>
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[c7eb655] | 29 |
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[6603f8b] | 30 | <indexterm zone="linux-pam">
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| 31 | <primary sortas="a-Linux-PAM">Linux-PAM</primary>
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[c7eb655] | 32 | </indexterm>
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| 33 |
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| 34 | <sect2 role="package">
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| 35 | <title>Introduction to Linux-PAM</title>
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| 36 |
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| 37 | <para>The <application>Linux-PAM</application> package contains
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| 38 | Pluggable Authentication Modules. This is useful to enable the
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| 39 | local system administrator to choose how applications authenticate
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| 40 | users.</para>
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| 41 |
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[1ae6204] | 42 | &lfs70_checked;
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[f4797d2] | 43 |
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[c7eb655] | 44 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 45 | <itemizedlist spacing="compact">
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| 46 | <listitem>
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[6603f8b] | 47 | <para>Download (HTTP): <ulink url="&linux-pam-download-http;"/></para>
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[c7eb655] | 48 | </listitem>
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| 49 | <listitem>
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[6603f8b] | 50 | <para>Download (FTP): <ulink url="&linux-pam-download-ftp;"/></para>
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[c7eb655] | 51 | </listitem>
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| 52 | <listitem>
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[6603f8b] | 53 | <para>Download MD5 sum: &linux-pam-md5sum;</para>
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[c7eb655] | 54 | </listitem>
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| 55 | <listitem>
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[6603f8b] | 56 | <para>Download size: &linux-pam-size;</para>
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[c7eb655] | 57 | </listitem>
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| 58 | <listitem>
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[6603f8b] | 59 | <para>Estimated disk space required: &linux-pam-buildsize;</para>
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[c7eb655] | 60 | </listitem>
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| 61 | <listitem>
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[6603f8b] | 62 | <para>Estimated build time: &linux-pam-time;</para>
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[c7eb655] | 63 | </listitem>
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| 64 | </itemizedlist>
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| 65 |
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| 66 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 67 | <itemizedlist spacing='compact'>
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[07f0c976] | 68 | <title>Optional Documentation</title>
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[c7eb655] | 69 | <listitem>
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[07f0c976] | 70 | <para>Download (HTTP): <ulink url="&linux-pam-docs-download;"/></para>
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[903f671] | 71 | </listitem>
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| 72 | <listitem>
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[07f0c976] | 73 | <para>Download MD5 sum: &linux-pam-docs-md5sum;</para>
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[903f671] | 74 | </listitem>
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| 75 | <listitem>
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| 76 | <para>Download size &linux-pam-docs-size;</para>
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[6576f3e] | 77 | </listitem>
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| 78 | </itemizedlist>
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| 79 |
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[c7eb655] | 80 | <bridgehead renderas="sect3">Linux-PAM Dependencies</bridgehead>
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| 81 |
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| 82 | <bridgehead renderas="sect4">Optional</bridgehead>
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[903f671] | 83 | <para role="optional"><xref linkend="cracklib"/>,
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[de7f20e] | 84 | <xref linkend="x-window-system"/>,
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| 85 | <xref linkend="db"/> (for the pam_userdb module), and
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[c03a8bd] | 86 | <ulink url="http://www.prelude-ids.org/">Prelude</ulink></para>
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| 87 |
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| 88 | <bridgehead renderas="sect4">Optional (To {,Re}build the Documentation)</bridgehead>
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| 89 | <para role="optional"><xref linkend="libxslt"/>,
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| 90 | <xref linkend="DocBook"/>,
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| 91 | <xref linkend="docbook-xsl"/>,
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| 92 | <xref linkend="w3m"/>, and
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| 93 | <xref linkend="fop"/></para>
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[c7eb655] | 94 |
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[3597eb6] | 95 | <para condition="html" role="usernotes">User Notes:
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| 96 | <ulink url="&blfs-wiki;/linux-pam"/></para>
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| 97 |
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[c7eb655] | 98 | </sect2>
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| 99 |
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| 100 | <sect2 role="installation">
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| 101 | <title>Installation of Linux-PAM</title>
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| 102 |
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[903f671] | 103 | <para>If you downloaded the documentation, unpack the tarball by issuing
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| 104 | the following command.</para>
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| 105 |
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[651ec29] | 106 | <screen><userinput>tar -xf ../Linux-PAM-&linux-pam-version;-docs.tar.bz2 --strip-components=1</userinput></screen>
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[ccb8b2d] | 107 |
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[c7eb655] | 108 | <para>Install <application>Linux-PAM</application> by
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| 109 | running the following commands:</para>
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| 110 |
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[903f671] | 111 | <screen><userinput>./configure --sbindir=/lib/security \
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[c03a8bd] | 112 | --docdir=/usr/share/doc/Linux-PAM-&linux-pam-version; \
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[903f671] | 113 | --enable-read-both-confs &&
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[c7eb655] | 114 | make</userinput></screen>
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[17fb537e] | 115 |
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[903f671] | 116 | <para>To test the results, a configuration file must be created. This file
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| 117 | will be removed after the tests have completed. Ensure there are no errors
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| 118 | produced by the tests before continuing the installation. First create the
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| 119 | configuration file by issuing the following commands as the
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| 120 | <systemitem class="username">root</systemitem> user:</para>
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| 121 |
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| 122 | <screen role="root"><userinput>install -v -m755 -d /etc/pam.d &&
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[c03a8bd] | 123 |
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[903f671] | 124 | cat > /etc/pam.d/other << "EOF"
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| 125 | auth required pam_deny.so
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| 126 | account required pam_deny.so
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| 127 | password required pam_deny.so
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| 128 | session required pam_deny.so
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| 129 | EOF</userinput></screen>
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[1ad238d8] | 130 |
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[903f671] | 131 | <para>Now run the tests by issuing <command>make check</command>.</para>
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| 132 |
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| 133 | <para>Remove the configuration file created earlier by issuing the
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| 134 | following command as the
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| 135 | <systemitem class="username">root</systemitem> user:</para>
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| 136 |
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| 137 | <screen role="root"><userinput>rm -rfv /etc/pam.d</userinput></screen>
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[f691f2b] | 138 |
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[c7eb655] | 139 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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[17fb537e] | 140 |
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[c7eb655] | 141 | <screen role="root"><userinput>make install &&
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[ee05358] | 142 | chmod -v 4755 /lib/security/unix_chkpwd &&
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[6869595] | 143 |
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[ccb8b2d] | 144 | mv -v /lib/security/pam_tally /sbin &&
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[6869595] | 145 |
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| 146 | mv -v /lib/libpam{,c,_misc}.la /usr/lib &&
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| 147 | sed -i 's| /lib| /usr/lib|' /usr/lib/libpam_misc.la &&
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| 148 |
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[336d44e3] | 149 | if [ -L /lib/libpam.so ]; then
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| 150 | for LINK in libpam{,c,_misc}.so; do
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| 151 | ln -v -sf ../../lib/$(readlink /lib/${LINK}) /usr/lib/${LINK} &&
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| 152 | rm -v /lib/${LINK}
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| 153 | done
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| 154 | fi</userinput></screen>
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[b4b71892] | 155 |
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[c7eb655] | 156 | </sect2>
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[b4b71892] | 157 |
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[c7eb655] | 158 | <sect2 role="commands">
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| 159 | <title>Command Explanations</title>
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[b4b71892] | 160 |
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[ccb8b2d] | 161 | <para><parameter>--sbindir=/lib/security</parameter>: This parameter
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[903f671] | 162 | results in three executables, two of which are not intended to be run from
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| 163 | the command line, being installed in the same directory as the PAM modules.
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[6869595] | 164 | The other executable is later moved to the
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[ccb8b2d] | 165 | <filename class='directory'>/sbin</filename> directory.</para>
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[b4b71892] | 166 |
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[c03a8bd] | 167 | <para><parameter>--docdir=...</parameter>: This parameter results in
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[ccb8b2d] | 168 | the documentation being installed in a versioned directory name.</para>
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[b4b71892] | 169 |
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[ccb8b2d] | 170 | <para><parameter>--enable-read-both-confs</parameter>: This parameter
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| 171 | allows the local administrator to choose which configuration file setup to
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| 172 | use.</para>
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[b4b71892] | 173 |
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[903f671] | 174 | <!-- This appears unnecessary as the xauth module is created even if X
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| 175 | has not yet been installed.
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| 176 | <para><parameter>-with-xauth=/usr/X11R6/bin/xauth</parameter>: This
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[a63de0c] | 177 | parameter forces the build of the pam_xauth module, even if xauth is not
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| 178 | yet installed. Omit this switch if you have no plans to build
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| 179 | <application>Xorg</application>, or modify the path if you intend to
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[903f671] | 180 | install <application>Xorg</application> into a non-standard path.</para> -->
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[a63de0c] | 181 |
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[ee05358] | 182 | <para><command>chmod -v 4755 /lib/security/unix_chkpwd</command>:
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| 183 | The <command>unix_chkpwd</command> password-helper program must be setuid
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| 184 | so that non-<systemitem class="username">root</systemitem> processes can
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| 185 | access the shadow-password file.</para>
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| 186 |
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[ccb8b2d] | 187 | <para><command>mv -v /lib/security/pam_tally /sbin</command>: The
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| 188 | <command>pam_tally</command> program is designed to be run by the system
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| 189 | administrator, possibly in single-user mode, so it is moved to the
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| 190 | appropriate directory.</para>
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| 191 |
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[6869595] | 192 | <para><command>mv -v /lib/libpam{,c,_misc}.la /usr/lib</command>: This
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| 193 | command moves the <application>Libtool</application> library files to
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| 194 | <filename class='directory'>/usr/lib</filename> as they are expected to
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| 195 | reside there.</para>
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| 196 |
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| 197 | <para><command>sed -i 's| /lib| /usr/lib|'
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| 198 | /usr/lib/libpam_misc.la</command>: This command corrects an installation
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| 199 | reference due to the file being moved in the previous step.</para>
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| 200 |
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| 201 | <para><command>for ...; do ...; done</command>: These commands are used
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[821b3bfc] | 202 | to relocate the <filename class='symlink'>.so</filename> symbolic links
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| 203 | into the <filename class='directory'>/usr/lib</filename> directory by
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| 204 | cloning and then removing the existing symlinks. Using
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| 205 | <command>readlink</command> ensures the new symlinks point at the correct
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| 206 | library filenames.</para>
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[aadd9ef] | 207 |
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[c7eb655] | 208 | </sect2>
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[b4b71892] | 209 |
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[c7eb655] | 210 | <sect2 role="configuration">
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| 211 | <title>Configuring Linux-PAM</title>
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[b4b71892] | 212 |
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[c7eb655] | 213 | <sect3 id="pam-config">
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| 214 | <title>Config Files</title>
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[b4b71892] | 215 |
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[c7eb655] | 216 | <para><filename>/etc/security/*</filename> and
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| 217 | <filename>/etc/pam.d/*</filename> or
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| 218 | <filename>/etc/pam.conf</filename></para>
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[b4b71892] | 219 |
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[6603f8b] | 220 | <indexterm zone="linux-pam pam-config">
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[c7eb655] | 221 | <primary sortas="e-etc-security">/etc/security/*</primary>
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| 222 | </indexterm>
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[b4b71892] | 223 |
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[6603f8b] | 224 | <indexterm zone="linux-pam pam-config">
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[c7eb655] | 225 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
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| 226 | </indexterm>
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| 227 |
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[6603f8b] | 228 | <indexterm zone="linux-pam pam-config">
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[c7eb655] | 229 | <primary sortas="e-etc-pam.conf">/etc/pam.conf</primary>
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| 230 | </indexterm>
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| 231 |
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| 232 | </sect3>
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| 233 |
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| 234 | <sect3>
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| 235 | <title>Configuration Information</title>
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| 236 |
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| 237 | <para>Configuration information is placed in
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| 238 | <filename class='directory'>/etc/pam.d/</filename> or
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[ccb8b2d] | 239 | <filename>/etc/pam.conf</filename> depending on system administrator
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| 240 | preference. Below are example files of each type:</para>
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[c7eb655] | 241 |
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| 242 | <screen><literal># Begin /etc/pam.d/other
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[b4b71892] | 243 |
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| 244 | auth required pam_unix.so nullok
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| 245 | account required pam_unix.so
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| 246 | session required pam_unix.so
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| 247 | password required pam_unix.so nullok
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| 248 |
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| 249 | # End /etc/pam.d/other
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| 250 |
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| 251 | # Begin /etc/pam.conf
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| 252 |
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| 253 | other auth required pam_unix.so nullok
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| 254 | other account required pam_unix.so
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| 255 | other session required pam_unix.so
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| 256 | other password required pam_unix.so nullok
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| 257 |
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[c7eb655] | 258 | # End /etc/pam.conf</literal></screen>
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| 259 |
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[1ae6204] | 260 | <para>The <application>PAM</application> man page (<command>man
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| 261 | pam</command>) provides a good starting point for descriptions of fields
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| 262 | and allowable entries. The <ulink
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| 263 | url="&debian-pam-docs;/Linux-PAM-html/Linux-PAM_SAG.html"> Linux-PAM
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| 264 | System Administrators' Guide</ulink> is recommended for additional
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| 265 | information.</para>
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[c7eb655] | 266 |
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[1ae6204] | 267 | <para>Refer to <ulink url="&debian-pam-docs;/modules.html"/> for a list
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| 268 | of various third-party modules available.</para>
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[c7eb655] | 269 |
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[ccb8b2d] | 270 | <important>
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[c7eb655] | 271 | <para>You should now reinstall the <xref linkend="shadow"/>
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| 272 | package.</para>
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[ccb8b2d] | 273 | </important>
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[c7eb655] | 274 |
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| 275 | </sect3>
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| 276 |
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| 277 | </sect2>
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| 278 |
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| 279 | <sect2 role="content">
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| 280 | <title>Contents</title>
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| 281 |
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| 282 | <segmentedlist>
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[ccb8b2d] | 283 | <segtitle>Installed Program</segtitle>
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[c7eb655] | 284 | <segtitle>Installed Libraries</segtitle>
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| 285 | <segtitle>Installed Directories</segtitle>
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| 286 |
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| 287 | <seglistitem>
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[ccb8b2d] | 288 | <seg>pam_tally</seg>
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[903f671] | 289 | <seg>libpam.{so,a}, libpamc.{so,a}, libpam_misc.{so,a} and
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| 290 | numerous PAM modules</seg>
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[3c9d219] | 291 | <seg>/etc/security, /lib/security, /usr/include/security,
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| 292 | /usr/share/doc/Linux-PAM-&linux-pam-version;,
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[903f671] | 293 | and /var/run/sepermit</seg>
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[c7eb655] | 294 | </seglistitem>
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| 295 | </segmentedlist>
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| 296 |
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| 297 | <variablelist>
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| 298 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 299 | <?dbfo list-presentation="list"?>
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| 300 | <?dbhtml list-presentation="table"?>
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| 301 |
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| 302 | <varlistentry id="pam_tally">
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| 303 | <term><command>pam_tally</command></term>
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| 304 | <listitem>
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| 305 | <para>is used to view or manipulate the <filename>faillog</filename>
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| 306 | file.</para>
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[6603f8b] | 307 | <indexterm zone="linux-pam pam_tally">
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[c7eb655] | 308 | <primary sortas="b-pam_tally">pam_tally</primary>
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| 309 | </indexterm>
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| 310 | </listitem>
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| 311 | </varlistentry>
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| 312 |
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| 313 | <varlistentry id="libpam">
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[3597eb6] | 314 | <term><filename class='libraryfile'>libpam.{so,a}</filename></term>
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[c7eb655] | 315 | <listitem>
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| 316 | <para>provides the interfaces between applications and the
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| 317 | PAM modules.</para>
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[6603f8b] | 318 | <indexterm zone="linux-pam libpam">
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[3597eb6] | 319 | <primary sortas="c-libpam">libpam.{so,a}</primary>
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[c7eb655] | 320 | </indexterm>
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| 321 | </listitem>
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| 322 | </varlistentry>
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| 323 |
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| 324 | </variablelist>
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| 325 |
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| 326 | </sect2>
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[b4b71892] | 327 |
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[3c52f859] | 328 | </sect1>
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