| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY linux-pam-download-http "https://github.com/linux-pam/linux-pam/releases/download/v&linux-pam-version;/Linux-PAM-&linux-pam-version;.tar.xz">
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| 8 | <!ENTITY linux-pam-download-ftp " ">
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| 9 | <!ENTITY linux-pam-md5sum "895e8adfa14af334f679bbeb28503f66">
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| 10 | <!ENTITY linux-pam-size "966 KB">
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| 11 | <!ENTITY linux-pam-buildsize "39 MB (with tests)">
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| 12 | <!ENTITY linux-pam-time "0.4 SBU (with tests)">
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| 13 |
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| 14 | <!ENTITY linux-pam-docs-download "https://github.com/linux-pam/linux-pam/releases/download/v&linux-pam-version;/Linux-PAM-&linux-pam-docs-version;-docs.tar.xz">
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| 15 | <!ENTITY linux-pam-docs-md5sum "ceb3dc248cb2f49a40904b93cb91db1b">
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| 16 | <!ENTITY linux-pam-docs-size "433 KB">
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| 17 | <!--
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| 18 | <!ENTITY debian-pam-docs "http://debian.securedservers.com/kernel/pub/linux/libs/pam">
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| 19 | -->
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| 20 | ]>
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| 21 |
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| 22 | <sect1 id="linux-pam" xreflabel="Linux-PAM-&linux-pam-version;">
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| 23 | <?dbhtml filename="linux-pam.html"?>
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| 24 |
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| 25 |
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| 26 | <title>Linux-PAM-&linux-pam-version;</title>
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| 27 |
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| 28 | <indexterm zone="linux-pam">
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| 29 | <primary sortas="a-Linux-PAM">Linux-PAM</primary>
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| 30 | </indexterm>
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| 31 |
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| 32 | <sect2 role="package">
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| 33 | <title>Introduction to Linux PAM</title>
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| 34 |
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| 35 | <para>
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| 36 | The <application>Linux PAM</application> package contains
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| 37 | Pluggable Authentication Modules used by the local
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| 38 | system administrator to control how application programs authenticate
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| 39 | users.
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| 40 | </para>
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| 41 |
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| 42 | &lfs113_checked;
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| 43 |
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| 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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| 47 | <para>
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| 48 | Download (HTTP): <ulink url="&linux-pam-download-http;"/>
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| 49 | </para>
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| 50 | </listitem>
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| 51 | <listitem>
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| 52 | <para>
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| 53 | Download (FTP): <ulink url="&linux-pam-download-ftp;"/>
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| 54 | </para>
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| 55 | </listitem>
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| 56 | <listitem>
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| 57 | <para>
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| 58 | Download MD5 sum: &linux-pam-md5sum;
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| 59 | </para>
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| 60 | </listitem>
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| 61 | <listitem>
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| 62 | <para>
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| 63 | Download size: &linux-pam-size;
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| 64 | </para>
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| 65 | </listitem>
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| 66 | <listitem>
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| 67 | <para>
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| 68 | Estimated disk space required: &linux-pam-buildsize;
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| 69 | </para>
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| 70 | </listitem>
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| 71 | <listitem>
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| 72 | <para>
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| 73 | Estimated build time: &linux-pam-time;
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| 74 | </para>
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| 75 | </listitem>
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| 76 | </itemizedlist>
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| 77 |
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| 78 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 79 | <itemizedlist spacing="compact">
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| 80 | <title>Optional Documentation</title>
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| 81 | <listitem>
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| 82 | <para>
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| 83 | Download (HTTP): <ulink url="&linux-pam-docs-download;"/>
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| 84 | </para>
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| 85 | </listitem>
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| 86 | <listitem>
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| 87 | <para>
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| 88 | Download MD5 sum: &linux-pam-docs-md5sum;
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| 89 | </para>
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| 90 | </listitem>
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| 91 | <listitem>
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| 92 | <para>
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| 93 | Download size &linux-pam-docs-size;
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| 94 | </para>
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| 95 | </listitem>
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| 96 | </itemizedlist>
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| 97 |
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| 98 | <bridgehead renderas="sect3">Linux PAM Dependencies</bridgehead>
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| 99 |
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| 100 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 101 | <para role="optional">
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| 102 | <xref linkend="db"/>,
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| 103 | <xref linkend="libnsl"/>,
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| 104 | <xref linkend="libtirpc"/>,
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| 105 | <ulink url="https://github.com/linux-audit/audit-userspace">libaudit</ulink>, and
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| 106 | <ulink url="https://www.prelude-siem.org">Prelude</ulink>
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| 107 | </para>
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| 108 |
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| 109 | <bridgehead renderas="sect4">Optional (To Rebuild the Documentation)</bridgehead>
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| 110 | <para role="optional">
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| 111 | <xref linkend="DocBook"/>,
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| 112 | <xref linkend="docbook-xsl"/>,
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| 113 | <xref linkend="fop"/>,
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| 114 | <xref linkend="libxslt"/> and either
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| 115 | <xref linkend="lynx"/> or
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| 116 | <ulink url="&w3m-url;">W3m</ulink>
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| 117 | </para>
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| 118 |
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| 119 | <note>
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| 120 | <para role="required">
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| 121 | <xref role="runtime" linkend="shadow"/>
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| 122 | <phrase revision="systemd"> and <xref role="runtime" linkend="systemd"/>
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| 123 | must</phrase><phrase revision="sysv">must</phrase> be reinstalled
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| 124 | and reconfigured
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| 125 | after installing and configuring <application>Linux PAM</application>.
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| 126 | </para>
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| 127 |
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| 128 | <para role="recommended">
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| 129 | With Linux-PAM-1.4.0 and higher, the pam_cracklib module is not
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| 130 | installed by default. Use <xref role="runtime" linkend="libpwquality"/>
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| 131 | to enforce strong passwords.
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| 132 | </para>
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| 133 | </note>
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| 134 |
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| 135 | <para condition="html" role="usernotes">User Notes:
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| 136 | <ulink url="&blfs-wiki;/linux-pam"/>
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| 137 | </para>
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| 138 | </sect2>
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| 139 |
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| 140 | <sect2 role="installation">
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| 141 | <title>Installation of Linux PAM</title>
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| 142 |
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| 143 | <para revision="sysv">
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| 144 | First, prevent the installation of an unneeded systemd file:
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| 145 | </para>
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| 146 |
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| 147 | <screen revision="sysv"><userinput>sed -e /service_DATA/d \
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| 148 | -i modules/pam_namespace/Makefile.am &&
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| 149 | autoreconf</userinput></screen>
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| 150 |
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| 151 | <para>
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| 152 | If you downloaded the documentation, unpack the tarball by issuing
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| 153 | the following command.
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| 154 | </para>
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| 155 |
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| 156 | <screen><userinput>tar -xf ../Linux-PAM-&linux-pam-docs-version;-docs.tar.xz --strip-components=1</userinput></screen>
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| 157 |
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| 158 | <para>
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| 159 | If you want to regenerate the documentation yourself, fix the
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| 160 | <command>configure</command> script so it will detect lynx:
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| 161 | </para>
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| 162 |
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| 163 | <screen><userinput>sed -e 's/dummy elinks/dummy lynx/' \
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| 164 | -e 's/-no-numbering -no-references/-force-html -nonumbers -stdin/' \
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| 165 | -i configure</userinput></screen>
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| 166 |
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| 167 | <para>
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| 168 | Compile and link <application>Linux PAM</application> by
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| 169 | running the following commands:
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| 170 | </para>
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| 171 |
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| 172 | <screen><userinput>./configure --prefix=/usr \
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| 173 | --sbindir=/usr/sbin \
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| 174 | --sysconfdir=/etc \
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| 175 | --libdir=/usr/lib \
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| 176 | --enable-securedir=/usr/lib/security \
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| 177 | --docdir=/usr/share/doc/Linux-PAM-&linux-pam-version; &&
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| 178 | make</userinput></screen>
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| 179 |
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| 180 | <para>
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| 181 | To test the results, a suitable <filename>/etc/pam.d/other</filename>
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| 182 | configuration file must exist.
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| 183 | </para>
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| 184 |
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| 185 | <caution>
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| 186 | <title>Reinstallation or Upgrade of Linux PAM</title>
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| 187 | <para>
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| 188 | If you have a system with Linux PAM installed and working, be careful
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| 189 | when modifying the files in
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| 190 | <filename class="directory">/etc/pam.d</filename>, since your system
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| 191 | may become totally unusable. If you want to run the tests, you do not
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| 192 | need to create another <filename>/etc/pam.d/other</filename> file. The
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| 193 | existing file can be used for the tests.
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| 194 | </para>
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| 195 |
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| 196 | <para>
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| 197 | You should also be aware that <command>make install</command>
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| 198 | overwrites the configuration files in
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| 199 | <filename class="directory">/etc/security</filename> as well as
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| 200 | <filename>/etc/environment</filename>. If you
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| 201 | have modified those files, be sure to back them up.
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| 202 | </para>
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| 203 | </caution>
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| 204 |
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| 205 | <para>
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| 206 | For a first-time installation, create a configuration file by issuing the
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| 207 | following commands as the <systemitem class="username">root</systemitem>
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| 208 | user:
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| 209 | </para>
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| 210 |
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| 211 | <screen role="root"><userinput>install -v -m755 -d /etc/pam.d &&
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| 212 |
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| 213 | cat > /etc/pam.d/other << "EOF"
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| 214 | <literal>auth required pam_deny.so
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| 215 | account required pam_deny.so
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| 216 | password required pam_deny.so
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| 217 | session required pam_deny.so</literal>
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| 218 | EOF</userinput></screen>
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| 219 |
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| 220 | <para>
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| 221 | Now run the tests by issuing <command>make check</command>.
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| 222 | Be sure the tests produced no errors before continuing the
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| 223 | installation. Note that the tests are very long.
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| 224 | Redirect the output to a log file, so you can inspect it thoroughly.
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| 225 | </para>
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| 226 |
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| 227 | <para>
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| 228 | For a first-time installation, remove the configuration file
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| 229 | created earlier by issuing the following command as the
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| 230 | <systemitem class="username">root</systemitem> user:
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| 231 | </para>
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| 232 |
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| 233 | <screen role="root"><userinput>rm -fv /etc/pam.d/other</userinput></screen>
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| 234 |
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| 235 | <para>
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| 236 | Now, as the <systemitem class="username">root</systemitem>
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| 237 | user:
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| 238 | </para>
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| 239 |
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| 240 | <screen role="root"><userinput>make install &&
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| 241 | chmod -v 4755 /usr/sbin/unix_chkpwd</userinput></screen>
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| 242 |
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| 243 | </sect2>
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| 244 |
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| 245 | <sect2 role="commands">
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| 246 | <title>Command Explanations</title>
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| 247 |
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| 248 | <para>
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| 249 | <parameter>--enable-securedir=/usr/lib/security</parameter>:
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| 250 | This switch sets the installation location for the
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| 251 | <application>PAM</application> modules.
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| 252 | </para>
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| 253 |
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| 254 | <para>
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| 255 | <option>--disable-regenerate-docu</option> : If the needed dependencies
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| 256 | (<xref linkend="DocBook"/>, <xref linkend="docbook-xsl"/>, <xref
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| 257 | linkend="libxslt"/>, and <xref linkend="lynx"/> or <ulink
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| 258 | url="&w3m-url;">W3m</ulink>) are installed, the manual pages, and the
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| 259 | html and text documentation files, are generated and installed.
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| 260 | Furthermore, if <xref linkend="fop"/> is installed, the PDF
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| 261 | documentation is generated and installed. Use this switch if you do not
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| 262 | want to rebuild the documentation.
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| 263 | </para>
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| 264 |
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| 265 | <para>
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| 266 | <command>chmod -v 4755 /usr/sbin/unix_chkpwd</command>:
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| 267 | The setuid bit for the <command>unix_chkpwd</command> helper program must be
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| 268 | turned on, so that non-<systemitem class="username">root</systemitem>
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| 269 | processes can access the shadow file.
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| 270 | </para>
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| 271 |
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| 272 | </sect2>
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| 273 |
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| 274 | <sect2 role="configuration">
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| 275 | <title>Configuring Linux-PAM</title>
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| 276 |
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| 277 | <sect3 id="pam-config">
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| 278 | <title>Configuration Files</title>
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| 279 |
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| 280 | <para>
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| 281 | <filename>/etc/security/*</filename> and
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| 282 | <filename>/etc/pam.d/*</filename>
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| 283 | </para>
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| 284 |
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| 285 | <indexterm zone="linux-pam pam-config">
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| 286 | <primary sortas="e-etc-security">/etc/security/*</primary>
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| 287 | </indexterm>
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| 288 |
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| 289 | <indexterm zone="linux-pam pam-config">
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| 290 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
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| 291 | </indexterm>
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| 292 |
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| 293 | </sect3>
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| 294 |
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| 295 | <sect3>
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| 296 | <title>Configuration Information</title>
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| 297 |
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| 298 | <para>
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| 299 | Configuration information is placed in
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| 300 | <filename class="directory">/etc/pam.d/</filename>.
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| 301 | Here is a sample file:
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| 302 | </para>
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| 303 |
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| 304 | <screen><literal># Begin /etc/pam.d/other
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| 305 |
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| 306 | auth required pam_unix.so nullok
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| 307 | account required pam_unix.so
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| 308 | session required pam_unix.so
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| 309 | password required pam_unix.so nullok
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| 310 |
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| 311 | # End /etc/pam.d/other</literal></screen>
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| 312 |
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| 313 | <para>
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| 314 | Now create some generic configuration files. As the
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| 315 | <systemitem class="username">root</systemitem> user:
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| 316 | </para>
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| 317 |
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| 318 | <screen role="root"><userinput>install -vdm755 /etc/pam.d &&
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| 319 | cat > /etc/pam.d/system-account << "EOF" &&
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| 320 | <literal># Begin /etc/pam.d/system-account
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| 321 |
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| 322 | account required pam_unix.so
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| 323 |
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| 324 | # End /etc/pam.d/system-account</literal>
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| 325 | EOF
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| 326 |
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| 327 | cat > /etc/pam.d/system-auth << "EOF" &&
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| 328 | <literal># Begin /etc/pam.d/system-auth
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| 329 |
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| 330 | auth required pam_unix.so
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| 331 |
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| 332 | # End /etc/pam.d/system-auth</literal>
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| 333 | EOF
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| 334 |
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| 335 | cat > /etc/pam.d/system-session << "EOF" &&
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| 336 | <literal># Begin /etc/pam.d/system-session
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| 337 |
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| 338 | session required pam_unix.so
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| 339 |
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| 340 | # End /etc/pam.d/system-session</literal>
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| 341 | EOF
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| 342 |
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| 343 | cat > /etc/pam.d/system-password << "EOF"
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| 344 | <literal># Begin /etc/pam.d/system-password
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| 345 |
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| 346 | # use sha512 hash for encryption, use shadow, and try to use any previously
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| 347 | # defined authentication token (chosen password) set by any prior module.
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| 348 | # Use the same number of rounds as shadow.
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| 349 | password required pam_unix.so sha512 shadow try_first_pass \
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| 350 | rounds=500000
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| 351 |
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| 352 | # End /etc/pam.d/system-password</literal>
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| 353 | EOF
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| 354 | </userinput></screen>
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| 355 |
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| 356 | <para>
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| 357 | If you wish to enable strong password support, install
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| 358 | <xref linkend="libpwquality"/>, and follow the
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| 359 | instructions on that page to configure the pam_pwquality
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| 360 | PAM module with strong password support.
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| 361 | </para>
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| 362 |
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| 363 | <!-- With the removal of the pam_cracklib module, we're supposed to be using
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| 364 | libpwquality. That already includes instructions in its configuration
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| 365 | information page, so we'll use those instead.
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| 366 |
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| 367 | Linux-PAM must be installed prior to libpwquality so that PAM support
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| 368 | is built in, and the PAM module is built.
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| 369 | -->
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| 370 | <!-- WARNING: If for any reason the instructions below are reinstated be
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| 371 | careful with the number of rounds, which should match the one in shadow.
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| 372 | <para>
|
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| 373 | The remaining generic file depends on whether <xref
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| 374 | linkend="cracklib"/> is installed. If it is installed, use:
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| 375 | </para>
|
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| 376 |
|
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| 377 | <screen role="root"><userinput>cat > /etc/pam.d/system-password << "EOF"
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| 378 | <literal># Begin /etc/pam.d/system-password
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| 379 |
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| 380 | # check new passwords for strength (man pam_cracklib)
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| 381 | password required pam_cracklib.so authtok_type=UNIX retry=1 difok=5 \
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| 382 | minlen=9 dcredit=1 ucredit=1 \
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| 383 | lcredit=1 ocredit=1 minclass=0 \
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|---|
| 384 | maxrepeat=0 maxsequence=0 \
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|---|
| 385 | maxclassrepeat=0 \
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| 386 | dictpath=/lib/cracklib/pw_dict
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| 387 | # use sha512 hash for encryption, use shadow, and use the
|
|---|
| 388 | # authentication token (chosen password) set by pam_cracklib
|
|---|
| 389 | # above (or any previous modules)
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|---|
| 390 | password required pam_unix.so sha512 shadow use_authtok
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| 391 |
|
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| 392 | # End /etc/pam.d/system-password</literal>
|
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| 393 | EOF</userinput></screen>
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| 394 |
|
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| 395 | <note>
|
|---|
| 396 | <para>
|
|---|
| 397 | In its default configuration, pam_cracklib will
|
|---|
| 398 | allow multiple case passwords as short as 6 characters, even with
|
|---|
| 399 | the <parameter>minlen</parameter> value set to 11. You should review
|
|---|
| 400 | the pam_cracklib(8) man page and determine if these default values
|
|---|
| 401 | are acceptable for the security of your system.
|
|---|
| 402 | </para>
|
|---|
| 403 | </note>
|
|---|
| 404 |
|
|---|
| 405 | <para>
|
|---|
| 406 | If <xref linkend="cracklib"/> is <emphasis>NOT</emphasis> installed,
|
|---|
| 407 | use:
|
|---|
| 408 | </para>
|
|---|
| 409 |
|
|---|
| 410 | <screen role="nodump"><userinput>cat > /etc/pam.d/system-password << "EOF"
|
|---|
| 411 | <literal># Begin /etc/pam.d/system-password
|
|---|
| 412 |
|
|---|
| 413 | # use sha512 hash for encryption, use shadow, and try to use any previously
|
|---|
| 414 | # defined authentication token (chosen password) set by any prior module
|
|---|
| 415 | password required pam_unix.so sha512 shadow try_first_pass
|
|---|
| 416 |
|
|---|
| 417 | # End /etc/pam.d/system-password</literal>
|
|---|
| 418 | EOF</userinput></screen>
|
|---|
| 419 | -->
|
|---|
| 420 | <para>
|
|---|
| 421 | Next, add a restrictive <filename>/etc/pam.d/other</filename>
|
|---|
| 422 | configuration file. With this file, programs that are PAM aware will
|
|---|
| 423 | not run unless a configuration file specifically for that application
|
|---|
| 424 | exists.
|
|---|
| 425 | </para>
|
|---|
| 426 |
|
|---|
| 427 | <screen role="root"><userinput>cat > /etc/pam.d/other << "EOF"
|
|---|
| 428 | <literal># Begin /etc/pam.d/other
|
|---|
| 429 |
|
|---|
| 430 | auth required pam_warn.so
|
|---|
| 431 | auth required pam_deny.so
|
|---|
| 432 | account required pam_warn.so
|
|---|
| 433 | account required pam_deny.so
|
|---|
| 434 | password required pam_warn.so
|
|---|
| 435 | password required pam_deny.so
|
|---|
| 436 | session required pam_warn.so
|
|---|
| 437 | session required pam_deny.so
|
|---|
| 438 |
|
|---|
| 439 | # End /etc/pam.d/other</literal>
|
|---|
| 440 | EOF</userinput></screen>
|
|---|
| 441 |
|
|---|
| 442 | <para>
|
|---|
| 443 | The <application>PAM</application> man page (<command>man
|
|---|
| 444 | pam</command>) provides a good starting point to learn
|
|---|
| 445 | about the several fields, and allowable entries.
|
|---|
| 446 | <!-- not accessible 2022-09-08 -->
|
|---|
| 447 | <!-- it's available at a different address 2022-10-23-->
|
|---|
| 448 | The
|
|---|
| 449 | <ulink url="https://www.docs4dev.com/docs/en/linux-pam/1.1.2/reference/Linux-PAM_SAG.html">
|
|---|
| 450 | Linux-PAM System Administrators' Guide
|
|---|
| 451 | </ulink> is recommended for additional information.
|
|---|
| 452 | </para>
|
|---|
| 453 |
|
|---|
| 454 | <important>
|
|---|
| 455 | <para>
|
|---|
| 456 | You should now reinstall the <xref linkend="shadow"/>
|
|---|
| 457 | <phrase revision="sysv">package</phrase>
|
|---|
| 458 | <phrase revision="systemd"> and <xref linkend="systemd"/>
|
|---|
| 459 | packages</phrase>.
|
|---|
| 460 | </para>
|
|---|
| 461 | </important>
|
|---|
| 462 |
|
|---|
| 463 | </sect3>
|
|---|
| 464 |
|
|---|
| 465 | </sect2>
|
|---|
| 466 |
|
|---|
| 467 | <sect2 role="content">
|
|---|
| 468 | <title>Contents</title>
|
|---|
| 469 |
|
|---|
| 470 | <segmentedlist>
|
|---|
| 471 | <segtitle>Installed Program</segtitle>
|
|---|
| 472 | <segtitle>Installed Libraries</segtitle>
|
|---|
| 473 | <segtitle>Installed Directories</segtitle>
|
|---|
| 474 |
|
|---|
| 475 | <seglistitem>
|
|---|
| 476 | <seg>
|
|---|
| 477 | faillock, mkhomedir_helper, pam_namespace_helper,
|
|---|
| 478 | pam_timestamp_check, pwhistory_helper, unix_chkpwd and
|
|---|
| 479 | unix_update
|
|---|
| 480 | </seg>
|
|---|
| 481 | <seg>
|
|---|
| 482 | libpam.so, libpamc.so and libpam_misc.so
|
|---|
| 483 | </seg>
|
|---|
| 484 | <seg>
|
|---|
| 485 | /etc/security,
|
|---|
| 486 | /usr/lib/security,
|
|---|
| 487 | /usr/include/security and
|
|---|
| 488 | /usr/share/doc/Linux-PAM-&linux-pam-version;
|
|---|
| 489 | </seg>
|
|---|
| 490 | </seglistitem>
|
|---|
| 491 | </segmentedlist>
|
|---|
| 492 |
|
|---|
| 493 | <variablelist>
|
|---|
| 494 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
|---|
| 495 | <?dbfo list-presentation="list"?>
|
|---|
| 496 | <?dbhtml list-presentation="table"?>
|
|---|
| 497 |
|
|---|
| 498 | <varlistentry id="faillock">
|
|---|
| 499 | <term><command>faillock</command></term>
|
|---|
| 500 | <listitem>
|
|---|
| 501 | <para>
|
|---|
| 502 | displays and modifies the authentication failure record files
|
|---|
| 503 | </para>
|
|---|
| 504 | <indexterm zone="linux-pam faillock">
|
|---|
| 505 | <primary sortas="b-faillock">faillock</primary>
|
|---|
| 506 | </indexterm>
|
|---|
| 507 | </listitem>
|
|---|
| 508 | </varlistentry>
|
|---|
| 509 |
|
|---|
| 510 | <varlistentry id="mkhomedir_helper">
|
|---|
| 511 | <term><command>mkhomedir_helper</command></term>
|
|---|
| 512 | <listitem>
|
|---|
| 513 | <para>
|
|---|
| 514 | is a helper binary that creates home directories
|
|---|
| 515 | </para>
|
|---|
| 516 | <indexterm zone="linux-pam mkhomedir_helper">
|
|---|
| 517 | <primary sortas="b-mkhomedir_helper">mkhomedir_helper</primary>
|
|---|
| 518 | </indexterm>
|
|---|
| 519 | </listitem>
|
|---|
| 520 | </varlistentry>
|
|---|
| 521 |
|
|---|
| 522 | <varlistentry id="pam_namespace_helper">
|
|---|
| 523 | <term><command>pam_namespace_helper</command></term>
|
|---|
| 524 | <listitem>
|
|---|
| 525 | <para>
|
|---|
| 526 | is a helper program used to configure a private namespace for a
|
|---|
| 527 | user session
|
|---|
| 528 | </para>
|
|---|
| 529 | <indexterm zone="linux-pam pam_namespace_helper">
|
|---|
| 530 | <primary sortas="b-pam_namespace_helper">pam_namespace_helper</primary>
|
|---|
| 531 | </indexterm>
|
|---|
| 532 | </listitem>
|
|---|
| 533 | </varlistentry>
|
|---|
| 534 |
|
|---|
| 535 | <varlistentry id="pwhistory_helper">
|
|---|
| 536 | <term><command>pwhistory_helper</command></term>
|
|---|
| 537 | <listitem>
|
|---|
| 538 | <para>
|
|---|
| 539 | is a helper program that transfers password hashes from passwd or
|
|---|
| 540 | shadow to opasswd
|
|---|
| 541 | </para>
|
|---|
| 542 | <indexterm zone="linux-pam pwhistory_helper">
|
|---|
| 543 | <primary sortas="b-pwhistory_helper">pwhistory_helper</primary>
|
|---|
| 544 | </indexterm>
|
|---|
| 545 | </listitem>
|
|---|
| 546 | </varlistentry>
|
|---|
| 547 | <!-- Removed with the removal of the pam_tally{,2} module
|
|---|
| 548 | <varlistentry id="pam_tally">
|
|---|
| 549 | <term><command>pam_tally</command></term>
|
|---|
| 550 | <listitem>
|
|---|
| 551 | <para>
|
|---|
| 552 | is used to interrogate and manipulate the login counter file.
|
|---|
| 553 | </para>
|
|---|
| 554 | <indexterm zone="linux-pam pam_tally">
|
|---|
| 555 | <primary sortas="b-pam_tally">pam_tally</primary>
|
|---|
| 556 | </indexterm>
|
|---|
| 557 | </listitem>
|
|---|
| 558 | </varlistentry>
|
|---|
| 559 |
|
|---|
| 560 | <varlistentry id="pam_tally2">
|
|---|
| 561 | <term><command>pam_tally2</command></term>
|
|---|
| 562 | <listitem>
|
|---|
| 563 | <para>
|
|---|
| 564 | is used to interrogate and manipulate the login counter file, but
|
|---|
| 565 | does not have some limitations that <command>pam_tally</command>
|
|---|
| 566 | does.
|
|---|
| 567 | </para>
|
|---|
| 568 | <indexterm zone="linux-pam pam_tally2">
|
|---|
| 569 | <primary sortas="b-pam_tally2">pam_tally2</primary>
|
|---|
| 570 | </indexterm>
|
|---|
| 571 | </listitem>
|
|---|
| 572 | </varlistentry>
|
|---|
| 573 | -->
|
|---|
| 574 |
|
|---|
| 575 | <varlistentry id="pam_timestamp_check">
|
|---|
| 576 | <term><command>pam_timestamp_check</command></term>
|
|---|
| 577 | <listitem>
|
|---|
| 578 | <para>
|
|---|
| 579 | is used to check if the default timestamp is valid
|
|---|
| 580 | </para>
|
|---|
| 581 | <indexterm zone="linux-pam pam_timestamp_check">
|
|---|
| 582 | <primary sortas="b-pam_timestamp_check">pam_timestamp_check</primary>
|
|---|
| 583 | </indexterm>
|
|---|
| 584 | </listitem>
|
|---|
| 585 | </varlistentry>
|
|---|
| 586 |
|
|---|
| 587 | <varlistentry id="unix_chkpwd">
|
|---|
| 588 | <term><command>unix_chkpwd</command></term>
|
|---|
| 589 | <listitem>
|
|---|
| 590 | <para>
|
|---|
| 591 | is a helper binary that verifies the password of the current user
|
|---|
| 592 | </para>
|
|---|
| 593 | <indexterm zone="linux-pam unix_chkpwd">
|
|---|
| 594 | <primary sortas="b-unix_chkpwd">unix_chkpwd</primary>
|
|---|
| 595 | </indexterm>
|
|---|
| 596 | </listitem>
|
|---|
| 597 | </varlistentry>
|
|---|
| 598 |
|
|---|
| 599 | <varlistentry id="unix_update">
|
|---|
| 600 | <term><command>unix_update</command></term>
|
|---|
| 601 | <listitem>
|
|---|
| 602 | <para>
|
|---|
| 603 | is a helper binary that updates the password of a given user
|
|---|
| 604 | </para>
|
|---|
| 605 | <indexterm zone="linux-pam unix_update">
|
|---|
| 606 | <primary sortas="b-unix_update">unix_update</primary>
|
|---|
| 607 | </indexterm>
|
|---|
| 608 | </listitem>
|
|---|
| 609 | </varlistentry>
|
|---|
| 610 |
|
|---|
| 611 | <varlistentry id="libpam">
|
|---|
| 612 | <term><filename class="libraryfile">libpam.so</filename></term>
|
|---|
| 613 | <listitem>
|
|---|
| 614 | <para>
|
|---|
| 615 | provides the interfaces between applications and the
|
|---|
| 616 | PAM modules
|
|---|
| 617 | </para>
|
|---|
| 618 | <indexterm zone="linux-pam libpam">
|
|---|
| 619 | <primary sortas="c-libpam">libpam.so</primary>
|
|---|
| 620 | </indexterm>
|
|---|
| 621 | </listitem>
|
|---|
| 622 | </varlistentry>
|
|---|
| 623 |
|
|---|
| 624 | </variablelist>
|
|---|
| 625 |
|
|---|
| 626 | </sect2>
|
|---|
| 627 |
|
|---|
| 628 | </sect1>
|
|---|
