1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.4/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 "http://www.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-&linux-pam-version;.tar.bz2">
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8 | <!ENTITY linux-pam-download-ftp "ftp://ftp.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-&linux-pam-version;.tar.bz2">
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9 | <!ENTITY linux-pam-md5sum "267ea71253615342261f9fc486d06647">
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10 | <!ENTITY linux-pam-size "783 KB">
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11 | <!ENTITY linux-pam-buildsize "19.8 MB">
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12 | <!ENTITY linux-pam-time "0.5 SBU">
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13 | <!ENTITY linux-pam-docs-download "http://www.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-&linux-pam-version;-docs.tar.bz2">
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14 | ]>
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15 |
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16 | <sect1 id="linux-pam" xreflabel="Linux-PAM-&linux-pam-version;">
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17 | <?dbhtml filename="linux-pam.html"?>
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18 |
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19 | <sect1info>
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20 | <othername>$LastChangedBy$</othername>
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21 | <date>$Date$</date>
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22 | </sect1info>
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23 |
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24 | <title>Linux-PAM-&linux-pam-version;</title>
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25 |
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26 | <indexterm zone="linux-pam">
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27 | <primary sortas="a-Linux-PAM">Linux-PAM</primary>
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28 | </indexterm>
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29 |
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30 | <sect2 role="package">
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31 | <title>Introduction to Linux-PAM</title>
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32 |
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33 | <para>The <application>Linux-PAM</application> package contains
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34 | Pluggable Authentication Modules. This is useful to enable the
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35 | local system administrator to choose how applications authenticate
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36 | users.</para>
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37 |
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38 | <bridgehead renderas="sect3">Package Information</bridgehead>
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39 | <itemizedlist spacing="compact">
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40 | <listitem>
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41 | <para>Download (HTTP): <ulink url="&linux-pam-download-http;"/></para>
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42 | </listitem>
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43 | <listitem>
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44 | <para>Download (FTP): <ulink url="&linux-pam-download-ftp;"/></para>
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45 | </listitem>
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46 | <listitem>
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47 | <para>Download MD5 sum: &linux-pam-md5sum;</para>
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48 | </listitem>
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49 | <listitem>
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50 | <para>Download size: &linux-pam-size;</para>
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51 | </listitem>
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52 | <listitem>
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53 | <para>Estimated disk space required: &linux-pam-buildsize;</para>
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54 | </listitem>
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55 | <listitem>
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56 | <para>Estimated build time: &linux-pam-time;</para>
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57 | </listitem>
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58 | </itemizedlist>
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59 |
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60 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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61 | <itemizedlist spacing='compact'>
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62 | <listitem>
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63 | <para>Optional documentation:
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64 | <ulink url="&linux-pam-docs-download;"/></para>
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65 | </listitem>
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66 | </itemizedlist>
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67 |
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68 | <bridgehead renderas="sect3">Linux-PAM Dependencies</bridgehead>
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69 |
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70 | <!-- Moved to optional after discussion on BLFS-Dev
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71 |
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72 | <bridgehead renderas="sect4">Recommended</bridgehead>
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73 | <para role="recommended"><xref linkend="cracklib"/></para>
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74 |
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75 | -->
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76 |
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77 | <bridgehead renderas="sect4">Optional</bridgehead>
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78 | <para role="optional"><xref linkend="cracklib"/>,
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79 | <!-- <xref linkend="db"/> (for the pam_userdb module), -->
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80 | <ulink url="http://www.prelude-ids.org/">Prelude</ulink>, and
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81 | <ulink url="http://sourceforge.net/projects/sgmltools-lite/">sgmltools-lite</ulink></para>
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82 |
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83 | <para condition="html" role="usernotes">User Notes:
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84 | <ulink url="&blfs-wiki;/linux-pam"/></para>
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85 |
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86 | </sect2>
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87 |
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88 | <sect2 role="installation">
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89 | <title>Installation of Linux-PAM</title>
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90 |
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91 | <para>If you downloaded the documentation, unpack the tarball into the
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92 | <filename class='directory'>doc</filename> directory of the source
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93 | tree:</para>
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94 |
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95 | <screen><userinput>tar -xf ../Linux-PAM-&linux-pam-version;-docs.tar.bz2 -C doc</userinput></screen>
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96 |
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97 | <para>Install <application>Linux-PAM</application> by
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98 | running the following commands:</para>
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99 |
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100 | <screen><userinput>./configure --libdir=/usr/lib \
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101 | --sbindir=/lib/security \
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102 | --enable-securedir=/lib/security \
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103 | --enable-docdir=/usr/share/doc/Linux-PAM-&linux-pam-version; \
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104 | --enable-read-both-confs &&
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105 | make</userinput></screen>
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106 |
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107 | <para>The test suite will not provide meaningful results until the package
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108 | has been installed and configured. If, after installing the package and
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109 | creating a minimum configuration as shown below in the 'other' example,
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110 | you wish to run the tests, issue <command>make check</command>.</para>
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111 |
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112 | <tip>
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113 | <para>Don't delete the <application>Linux-PAM</application> source tree
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114 | until after you reinstall the <application>Shadow</application> package.
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115 | The reinstallation of the Shadow package includes much more stringent
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116 | security for the PAM configuration, and you can run the
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117 | <application>Linux-PAM</application> test suite after completing the
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118 | <application>Shadow</application> instructions to test the new setup. All
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119 | the tests should pass.</para>
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120 | </tip>
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121 |
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122 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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123 |
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124 | <screen role="root"><userinput>make install &&
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125 | chmod -v 4755 /lib/security/unix_chkpwd &&
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126 | mv -v /lib/security/pam_tally /sbin &&
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127 | mv -v /usr/lib/libpam*.so.0* /lib &&
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128 | ln -v -sf ../../lib/libpam.so.0.81.3 /usr/lib/libpam.so &&
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129 | ln -v -sf ../../lib/libpamc.so.0.81.0 /usr/lib/libpamc.so &&
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130 | ln -v -sf ../../lib/libpam_misc.so.0.81.2 /usr/lib/libpam_misc.so</userinput></screen>
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131 |
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132 | <para>If you downloaded the documentation, install it using the following
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133 | command:</para>
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134 |
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135 | <screen role="root"><userinput>for DOCTYPE in html pdf ps txts
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136 | do
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137 | cp -v -R doc/$DOCTYPE /usr/share/doc/Linux-PAM-&linux-pam-version;
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138 | done</userinput></screen>
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139 |
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140 | </sect2>
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141 |
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142 | <sect2 role="commands">
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143 | <title>Command Explanations</title>
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144 |
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145 | <para><parameter>--libdir=/usr/lib</parameter>: This parameter results in
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146 | the libraries being installed in
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147 | <filename class='directory'>/usr/lib</filename>.</para>
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148 |
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149 | <para><parameter>--sbindir=/lib/security</parameter>: This parameter
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150 | results in two executables, one which is not intended to be run from the
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151 | command line, being installed in the same directory as the PAM modules.
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152 | One of the executables is later moved to the
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153 | <filename class='directory'>/sbin</filename> directory.</para>
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154 |
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155 | <para><parameter>--enable-securedir=/lib/security</parameter>: This
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156 | parameter results in the PAM modules being installed in
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157 | <filename class='directory'>/lib/security</filename>.</para>
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158 |
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159 | <para><parameter>--enable-docdir=...</parameter>: This parameter results in
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160 | the documentation being installed in a versioned directory name.</para>
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161 |
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162 | <para><parameter>--enable-read-both-confs</parameter>: This parameter
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163 | allows the local administrator to choose which configuration file setup to
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164 | use.</para>
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165 |
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166 | <para><command>chmod -v 4755 /lib/security/unix_chkpwd</command>:
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167 | The <command>unix_chkpwd</command> password-helper program must be setuid
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168 | so that non-<systemitem class="username">root</systemitem> processes can
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169 | access the shadow-password file.</para>
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170 |
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171 | <para><command>mv -v /lib/security/pam_tally /sbin</command>: The
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172 | <command>pam_tally</command> program is designed to be run by the system
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173 | administrator, possibly in single-user mode, so it is moved to the
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174 | appropriate directory.</para>
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175 |
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176 | <para><command>mv -v /usr/lib/libpam*.so.0* /lib</command>: This command
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177 | moves the dynamic libraries to <filename class='directory'>/lib</filename>
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178 | as they may be required in single user mode.</para>
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179 |
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180 | <para><command>ln -v -sf ...</command>: These commands recreate the
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181 | <filename class='symlink'>.so</filename> symlinks as the libraries they
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182 | pointed to were moved to <filename class='directory'>/lib</filename>.</para>
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183 |
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184 | </sect2>
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185 |
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186 | <sect2 role="configuration">
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187 | <title>Configuring Linux-PAM</title>
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188 |
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189 | <sect3 id="pam-config">
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190 | <title>Config Files</title>
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191 |
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192 | <para><filename>/etc/security/*</filename> and
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193 | <filename>/etc/pam.d/*</filename> or
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194 | <filename>/etc/pam.conf</filename></para>
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195 |
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196 | <indexterm zone="linux-pam pam-config">
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197 | <primary sortas="e-etc-security">/etc/security/*</primary>
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198 | </indexterm>
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199 |
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200 | <indexterm zone="linux-pam pam-config">
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201 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
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202 | </indexterm>
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203 |
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204 | <indexterm zone="linux-pam pam-config">
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205 | <primary sortas="e-etc-pam.conf">/etc/pam.conf</primary>
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206 | </indexterm>
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207 |
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208 | </sect3>
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209 |
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210 | <sect3>
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211 | <title>Configuration Information</title>
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212 |
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213 | <para>Configuration information is placed in
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214 | <filename class='directory'>/etc/pam.d/</filename> or
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215 | <filename>/etc/pam.conf</filename> depending on system administrator
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216 | preference. Below are example files of each type:</para>
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217 |
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218 | <screen><literal># Begin /etc/pam.d/other
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219 |
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220 | auth required pam_unix.so nullok
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221 | account required pam_unix.so
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222 | session required pam_unix.so
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223 | password required pam_unix.so nullok
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224 |
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225 | # End /etc/pam.d/other
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226 |
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227 | # Begin /etc/pam.conf
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228 |
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229 | other auth required pam_unix.so nullok
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230 | other account required pam_unix.so
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231 | other session required pam_unix.so
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232 | other password required pam_unix.so nullok
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233 |
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234 | # End /etc/pam.conf</literal></screen>
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235 |
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236 | <para>The <application>PAM</application> man page
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237 | (<command>man pam</command>) provides a good starting point for
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238 | descriptions of fields and allowable entries. The <ulink
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239 | url="http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/pam.html">
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240 | Linux-PAM System Administrators' Guide</ulink>
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241 | is recommended for additional information.</para>
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242 |
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243 | <para>Refer to <ulink
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244 | url="http://www.kernel.org/pub/linux/libs/pam/modules.html"/>
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245 | for a list of various modules available.</para>
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246 |
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247 | <important>
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248 | <para>You should now reinstall the <xref linkend="shadow"/>
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249 | package.</para>
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250 | </important>
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251 |
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252 | </sect3>
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253 |
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254 | </sect2>
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255 |
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256 | <sect2 role="content">
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257 | <title>Contents</title>
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258 |
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259 | <segmentedlist>
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260 | <segtitle>Installed Program</segtitle>
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261 | <segtitle>Installed Libraries</segtitle>
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262 | <segtitle>Installed Directories</segtitle>
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263 |
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264 | <seglistitem>
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265 | <seg>pam_tally</seg>
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266 | <seg>libpam.{so,a}, libpamc.{so,a}, and libpam_misc.{so,a}</seg>
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267 | <seg>/etc/pam.d, /etc/security, /lib/security and
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268 | /usr/include/security</seg>
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269 | </seglistitem>
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270 | </segmentedlist>
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271 |
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272 | <variablelist>
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273 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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274 | <?dbfo list-presentation="list"?>
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275 | <?dbhtml list-presentation="table"?>
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276 |
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277 | <varlistentry id="pam_tally">
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278 | <term><command>pam_tally</command></term>
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279 | <listitem>
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280 | <para>is used to view or manipulate the <filename>faillog</filename>
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281 | file.</para>
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282 | <indexterm zone="linux-pam pam_tally">
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283 | <primary sortas="b-pam_tally">pam_tally</primary>
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284 | </indexterm>
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285 | </listitem>
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286 | </varlistentry>
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287 |
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288 | <varlistentry id="libpam">
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289 | <term><filename class='libraryfile'>libpam.{so,a}</filename></term>
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290 | <listitem>
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291 | <para>provides the interfaces between applications and the
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292 | PAM modules.</para>
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293 | <indexterm zone="linux-pam libpam">
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294 | <primary sortas="c-libpam">libpam.{so,a}</primary>
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295 | </indexterm>
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296 | </listitem>
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297 | </varlistentry>
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298 |
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299 | </variablelist>
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300 |
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301 | </sect2>
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302 |
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303 | </sect1>
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