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-rw-r--r--modules/pam_lastlog/Makefile.am33
-rw-r--r--modules/pam_lastlog/Makefile.in1150
-rw-r--r--modules/pam_lastlog/README96
-rw-r--r--modules/pam_lastlog/README.xml41
-rw-r--r--modules/pam_lastlog/pam_lastlog.8197
-rw-r--r--modules/pam_lastlog/pam_lastlog.8.xml343
-rw-r--r--modules/pam_lastlog/pam_lastlog.c804
-rwxr-xr-xmodules/pam_lastlog/tst-pam_lastlog2
8 files changed, 2666 insertions, 0 deletions
diff --git a/modules/pam_lastlog/Makefile.am b/modules/pam_lastlog/Makefile.am
new file mode 100644
index 0000000..dc0c7c4
--- /dev/null
+++ b/modules/pam_lastlog/Makefile.am
@@ -0,0 +1,33 @@
+#
+# Copyright (c) 2005, 2006, 2009 Thorsten Kukuk <kukuk@suse.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = $(XMLS)
+
+if HAVE_DOC
+dist_man_MANS = pam_lastlog.8
+endif
+XMLS = README.xml pam_lastlog.8.xml
+dist_check_SCRIPTS = tst-pam_lastlog
+TESTS = $(dist_check_SCRIPTS)
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ $(WARN_CFLAGS)
+AM_LDFLAGS = -no-undefined -avoid-version -module
+if HAVE_VERSIONING
+ AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_lastlog.la
+pam_lastlog_la_LIBADD = $(top_builddir)/libpam/libpam.la -lutil
+
+if ENABLE_REGENERATE_MAN
+dist_noinst_DATA = README
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_lastlog/Makefile.in b/modules/pam_lastlog/Makefile.in
new file mode 100644
index 0000000..16baea8
--- /dev/null
+++ b/modules/pam_lastlog/Makefile.in
@@ -0,0 +1,1150 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
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+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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+
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+distdir: $(BUILT_SOURCES)
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+distdir-am: $(DISTFILES)
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+ for file in $$dist_files; do \
+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
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+ else \
+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
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+check-am: all-am
+ $(MAKE) $(AM_MAKEFLAGS) $(dist_check_SCRIPTS)
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+ test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+ done
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+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+ fi
+mostlyclean-generic:
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+clean-generic:
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+distclean-generic:
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+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/modules/pam_lastlog/README b/modules/pam_lastlog/README
new file mode 100644
index 0000000..9b0cff9
--- /dev/null
+++ b/modules/pam_lastlog/README
@@ -0,0 +1,96 @@
+pam_lastlog — PAM module to display date of last login and perform inactive
+account lock out
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+pam_lastlog is a PAM module to display a line of information about the last
+login of the user. In addition, the module maintains the /var/log/lastlog file.
+
+Some applications may perform this function themselves. In such cases, this
+module is not necessary.
+
+The module checks LASTLOG_UID_MAX option in /etc/login.defs and does not update
+or display last login records for users with UID higher than its value. If the
+option is not present or its value is invalid, no user ID limit is applied.
+
+If the module is called in the auth or account phase, the accounts that were
+not used recently enough will be disallowed to log in. The check is not
+performed for the root account so the root is never locked out. It is also not
+performed for users with UID higher than the LASTLOG_UID_MAX value.
+
+OPTIONS
+
+debug
+
+ Print debug information.
+
+silent
+
+ Don't inform the user about any previous login, just update the /var/log/
+ lastlog file. This option does not affect display of bad login attempts.
+
+never
+
+ If the /var/log/lastlog file does not contain any old entries for the user,
+ indicate that the user has never previously logged in with a welcome
+ message.
+
+nodate
+
+ Don't display the date of the last login.
+
+noterm
+
+ Don't display the terminal name on which the last login was attempted.
+
+nohost
+
+ Don't indicate from which host the last login was attempted.
+
+nowtmp
+
+ Don't update the wtmp entry.
+
+noupdate
+
+ Don't update any file.
+
+showfailed
+
+ Display number of failed login attempts and the date of the last failed
+ attempt from btmp. The date is not displayed when nodate is specified.
+
+inactive=<days>
+
+ This option is specific for the auth or account phase. It specifies the
+ number of days after the last login of the user when the user will be
+ locked out by the module. The default value is 90.
+
+unlimited
+
+ If the fsize limit is set, this option can be used to override it,
+ preventing failures on systems with large UID values that lead lastlog to
+ become a huge sparse file.
+
+EXAMPLES
+
+Add the following line to /etc/pam.d/login to display the last login time of a
+user:
+
+ session required pam_lastlog.so nowtmp
+
+
+To reject the user if he did not login during the previous 50 days the
+following line can be used:
+
+ auth required pam_lastlog.so inactive=50
+
+
+AUTHOR
+
+pam_lastlog was written by Andrew G. Morgan <morgan@kernel.org>.
+
+Inactive account lock out added by Tomáš Mráz <tm@t8m.info>.
+
diff --git a/modules/pam_lastlog/README.xml b/modules/pam_lastlog/README.xml
new file mode 100644
index 0000000..7fe7033
--- /dev/null
+++ b/modules/pam_lastlog/README.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+"http://www.docbook.org/xml/4.3/docbookx.dtd"
+[
+<!--
+<!ENTITY pamaccess SYSTEM "pam_lastlog.8.xml">
+-->
+]>
+
+<article>
+
+ <articleinfo>
+
+ <title>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_lastlog.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_lastlog-name"]/*)'/>
+ </title>
+
+ </articleinfo>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_lastlog.8.xml" xpointer='xpointer(//refsect1[@id = "pam_lastlog-description"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_lastlog.8.xml" xpointer='xpointer(//refsect1[@id = "pam_lastlog-options"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_lastlog.8.xml" xpointer='xpointer(//refsect1[@id = "pam_lastlog-examples"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_lastlog.8.xml" xpointer='xpointer(//refsect1[@id = "pam_lastlog-author"]/*)'/>
+ </section>
+
+</article>
diff --git a/modules/pam_lastlog/pam_lastlog.8 b/modules/pam_lastlog/pam_lastlog.8
new file mode 100644
index 0000000..325456e
--- /dev/null
+++ b/modules/pam_lastlog/pam_lastlog.8
@@ -0,0 +1,197 @@
+'\" t
+.\" Title: pam_lastlog
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
+.\" Date: 09/03/2021
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_LASTLOG" "8" "09/03/2021" "Linux-PAM Manual" "Linux\-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+pam_lastlog \- PAM module to display date of last login and perform inactive account lock out
+.SH "SYNOPSIS"
+.HP \w'\fBpam_lastlog\&.so\fR\ 'u
+\fBpam_lastlog\&.so\fR [debug] [silent] [never] [nodate] [nohost] [noterm] [nowtmp] [noupdate] [showfailed] [inactive=<days>] [unlimited]
+.SH "DESCRIPTION"
+.PP
+pam_lastlog is a PAM module to display a line of information about the last login of the user\&. In addition, the module maintains the
+/var/log/lastlog
+file\&.
+.PP
+Some applications may perform this function themselves\&. In such cases, this module is not necessary\&.
+.PP
+The module checks
+\fBLASTLOG_UID_MAX\fR
+option in
+/etc/login\&.defs
+and does not update or display last login records for users with UID higher than its value\&. If the option is not present or its value is invalid, no user ID limit is applied\&.
+.PP
+If the module is called in the auth or account phase, the accounts that were not used recently enough will be disallowed to log in\&. The check is not performed for the root account so the root is never locked out\&. It is also not performed for users with UID higher than the
+\fBLASTLOG_UID_MAX\fR
+value\&.
+.SH "OPTIONS"
+.PP
+\fBdebug\fR
+.RS 4
+Print debug information\&.
+.RE
+.PP
+\fBsilent\fR
+.RS 4
+Don\*(Aqt inform the user about any previous login, just update the
+/var/log/lastlog
+file\&. This option does not affect display of bad login attempts\&.
+.RE
+.PP
+\fBnever\fR
+.RS 4
+If the
+/var/log/lastlog
+file does not contain any old entries for the user, indicate that the user has never previously logged in with a welcome message\&.
+.RE
+.PP
+\fBnodate\fR
+.RS 4
+Don\*(Aqt display the date of the last login\&.
+.RE
+.PP
+\fBnoterm\fR
+.RS 4
+Don\*(Aqt display the terminal name on which the last login was attempted\&.
+.RE
+.PP
+\fBnohost\fR
+.RS 4
+Don\*(Aqt indicate from which host the last login was attempted\&.
+.RE
+.PP
+\fBnowtmp\fR
+.RS 4
+Don\*(Aqt update the wtmp entry\&.
+.RE
+.PP
+\fBnoupdate\fR
+.RS 4
+Don\*(Aqt update any file\&.
+.RE
+.PP
+\fBshowfailed\fR
+.RS 4
+Display number of failed login attempts and the date of the last failed attempt from btmp\&. The date is not displayed when
+\fBnodate\fR
+is specified\&.
+.RE
+.PP
+\fBinactive=<days>\fR
+.RS 4
+This option is specific for the auth or account phase\&. It specifies the number of days after the last login of the user when the user will be locked out by the module\&. The default value is 90\&.
+.RE
+.PP
+\fBunlimited\fR
+.RS 4
+If the
+\fIfsize\fR
+limit is set, this option can be used to override it, preventing failures on systems with large UID values that lead lastlog to become a huge sparse file\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+The
+\fBauth\fR
+and
+\fBaccount\fR
+module type allows one to lock out users who did not login recently enough\&. The
+\fBsession\fR
+module type is provided for displaying the information about the last login and/or updating the lastlog and wtmp files\&.
+.SH "RETURN VALUES"
+.PP
+.PP
+PAM_SUCCESS
+.RS 4
+Everything was successful\&.
+.RE
+.PP
+PAM_SERVICE_ERR
+.RS 4
+Internal service module error\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+User not known\&.
+.RE
+.PP
+PAM_AUTH_ERR
+.RS 4
+User locked out in the auth or account phase due to inactivity\&.
+.RE
+.PP
+PAM_IGNORE
+.RS 4
+There was an error during reading the lastlog file in the auth or account phase and thus inactivity of the user cannot be determined\&.
+.RE
+.SH "EXAMPLES"
+.PP
+Add the following line to
+/etc/pam\&.d/login
+to display the last login time of a user:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ session required pam_lastlog\&.so nowtmp
+
+.fi
+.if n \{\
+.RE
+.\}
+.PP
+To reject the user if he did not login during the previous 50 days the following line can be used:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ auth required pam_lastlog\&.so inactive=50
+
+.fi
+.if n \{\
+.RE
+.\}
+.SH "FILES"
+.PP
+/var/log/lastlog
+.RS 4
+Lastlog logging file
+.RE
+.SH "SEE ALSO"
+.PP
+\fBlimits.conf\fR(5),
+\fBpam.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+.SH "AUTHOR"
+.PP
+pam_lastlog was written by Andrew G\&. Morgan <morgan@kernel\&.org>\&.
+.PP
+Inactive account lock out added by Tomáš Mráz <tm@t8m\&.info>\&.
diff --git a/modules/pam_lastlog/pam_lastlog.8.xml b/modules/pam_lastlog/pam_lastlog.8.xml
new file mode 100644
index 0000000..bada2ea
--- /dev/null
+++ b/modules/pam_lastlog/pam_lastlog.8.xml
@@ -0,0 +1,343 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+ "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
+
+<refentry id="pam_lastlog">
+
+ <refmeta>
+ <refentrytitle>pam_lastlog</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id="pam_lastlog-name">
+ <refname>pam_lastlog</refname>
+ <refpurpose>PAM module to display date of last login and perform inactive account lock out</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pam_lastlog-cmdsynopsis">
+ <command>pam_lastlog.so</command>
+ <arg choice="opt">
+ debug
+ </arg>
+ <arg choice="opt">
+ silent
+ </arg>
+ <arg choice="opt">
+ never
+ </arg>
+ <arg choice="opt">
+ nodate
+ </arg>
+ <arg choice="opt">
+ nohost
+ </arg>
+ <arg choice="opt">
+ noterm
+ </arg>
+ <arg choice="opt">
+ nowtmp
+ </arg>
+ <arg choice="opt">
+ noupdate
+ </arg>
+ <arg choice="opt">
+ showfailed
+ </arg>
+ <arg choice="opt">
+ inactive=&lt;days&gt;
+ </arg>
+ <arg choice="opt">
+ unlimited
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1 id="pam_lastlog-description">
+
+ <title>DESCRIPTION</title>
+
+ <para>
+ pam_lastlog is a PAM module to display a line of information
+ about the last login of the user. In addition, the module maintains
+ the <filename>/var/log/lastlog</filename> file.
+ </para>
+ <para>
+ Some applications may perform this function themselves. In such
+ cases, this module is not necessary.
+ </para>
+ <para>
+ The module checks <option>LASTLOG_UID_MAX</option> option in
+ <filename>/etc/login.defs</filename> and does not update or display
+ last login records for users with UID higher than its value.
+ If the option is not present or its value is invalid, no user ID
+ limit is applied.
+ </para>
+ <para>
+ If the module is called in the auth or account phase, the accounts that
+ were not used recently enough will be disallowed to log in. The
+ check is not performed for the root account so the root is never
+ locked out. It is also not performed for users with UID higher
+ than the <option>LASTLOG_UID_MAX</option> value.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_lastlog-options">
+
+ <title>OPTIONS</title>
+ <variablelist>
+ <varlistentry>
+ <term>
+ <option>debug</option>
+ </term>
+ <listitem>
+ <para>
+ Print debug information.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>silent</option>
+ </term>
+ <listitem>
+ <para>
+ Don't inform the user about any previous login,
+ just update the <filename>/var/log/lastlog</filename> file.
+ This option does not affect display of bad login attempts.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>never</option>
+ </term>
+ <listitem>
+ <para>
+ If the <filename>/var/log/lastlog</filename> file does
+ not contain any old entries for the user, indicate that
+ the user has never previously logged in with a welcome
+ message.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>nodate</option>
+ </term>
+ <listitem>
+ <para>
+ Don't display the date of the last login.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>noterm</option>
+ </term>
+ <listitem>
+ <para>
+ Don't display the terminal name on which the
+ last login was attempted.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>nohost</option>
+ </term>
+ <listitem>
+ <para>
+ Don't indicate from which host the last login was
+ attempted.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>nowtmp</option>
+ </term>
+ <listitem>
+ <para>
+ Don't update the wtmp entry.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>noupdate</option>
+ </term>
+ <listitem>
+ <para>
+ Don't update any file.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>showfailed</option>
+ </term>
+ <listitem>
+ <para>
+ Display number of failed login attempts and the date of the
+ last failed attempt from btmp. The date is not displayed
+ when <option>nodate</option> is specified.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>inactive=&lt;days&gt;</option>
+ </term>
+ <listitem>
+ <para>
+ This option is specific for the auth or account phase. It
+ specifies the number of days after the last login of the user
+ when the user will be locked out by the module. The default
+ value is 90.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>unlimited</option>
+ </term>
+ <listitem>
+ <para>
+ If the <emphasis>fsize</emphasis> limit is set, this option can be
+ used to override it, preventing failures on systems with large UID
+ values that lead lastlog to become a huge sparse file.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_lastlog-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ The <option>auth</option> and <option>account</option> module type
+ allows one to lock out users who did not login recently enough.
+ The <option>session</option> module type is provided for displaying
+ the information about the last login and/or updating the lastlog and
+ wtmp files.
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_lastlog-return_values'>
+ <title>RETURN VALUES</title>
+ <para>
+ <variablelist>
+
+ <varlistentry>
+ <term>PAM_SUCCESS</term>
+ <listitem>
+ <para>
+ Everything was successful.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>PAM_SERVICE_ERR</term>
+ <listitem>
+ <para>
+ Internal service module error.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>PAM_USER_UNKNOWN</term>
+ <listitem>
+ <para>
+ User not known.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>PAM_AUTH_ERR</term>
+ <listitem>
+ <para>
+ User locked out in the auth or account phase due to
+ inactivity.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>PAM_IGNORE</term>
+ <listitem>
+ <para>
+ There was an error during reading the lastlog file
+ in the auth or account phase and thus inactivity
+ of the user cannot be determined.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_lastlog-examples'>
+ <title>EXAMPLES</title>
+ <para>
+ Add the following line to <filename>/etc/pam.d/login</filename> to
+ display the last login time of a user:
+ </para>
+ <programlisting>
+ session required pam_lastlog.so nowtmp
+ </programlisting>
+ <para>
+ To reject the user if he did not login during the previous 50 days
+ the following line can be used:
+ </para>
+ <programlisting>
+ auth required pam_lastlog.so inactive=50
+ </programlisting>
+ </refsect1>
+
+ <refsect1 id="pam_lastlog-files">
+ <title>FILES</title>
+ <variablelist>
+ <varlistentry>
+ <term><filename>/var/log/lastlog</filename></term>
+ <listitem>
+ <para>Lastlog logging file</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id='pam_lastlog-see_also'>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>limits.conf</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_lastlog-author'>
+ <title>AUTHOR</title>
+ <para>
+ pam_lastlog was written by Andrew G. Morgan &lt;morgan@kernel.org&gt;.
+ </para>
+ <para>
+ Inactive account lock out added by Tomáš Mráz &lt;tm@t8m.info&gt;.
+ </para>
+ </refsect1>
+
+</refentry>
diff --git a/modules/pam_lastlog/pam_lastlog.c b/modules/pam_lastlog/pam_lastlog.c
new file mode 100644
index 0000000..abd048d
--- /dev/null
+++ b/modules/pam_lastlog/pam_lastlog.c
@@ -0,0 +1,804 @@
+/*
+ * pam_lastlog module
+ *
+ * Written by Andrew Morgan <morgan@linux.kernel.org> 1996/3/11
+ *
+ * This module does the necessary work to display the last login
+ * time+date for this user, it then updates this entry for the
+ * present (login) service.
+ */
+
+#include "config.h"
+
+#include <fcntl.h>
+#include <time.h>
+#include <errno.h>
+#ifdef HAVE_UTMP_H
+# include <utmp.h>
+#else
+# include <lastlog.h>
+#endif
+#include <pwd.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <syslog.h>
+#include <unistd.h>
+
+#if defined(hpux) || defined(sunos) || defined(solaris)
+# ifndef _PATH_LASTLOG
+# define _PATH_LASTLOG "/usr/adm/lastlog"
+# endif /* _PATH_LASTLOG */
+# ifndef UT_HOSTSIZE
+# define UT_HOSTSIZE 16
+# endif /* UT_HOSTSIZE */
+# ifndef UT_LINESIZE
+# define UT_LINESIZE 12
+# endif /* UT_LINESIZE */
+#endif
+#if defined(hpux)
+struct lastlog {
+ time_t ll_time;
+ char ll_line[UT_LINESIZE];
+ char ll_host[UT_HOSTSIZE]; /* same as in utmp */
+};
+#endif /* hpux */
+
+#ifndef _PATH_BTMP
+# define _PATH_BTMP "/var/log/btmp"
+#endif
+
+#ifndef PATH_LOGIN_DEFS
+# define PATH_LOGIN_DEFS "/etc/login.defs"
+#endif
+
+/* XXX - time before ignoring lock. Is 1 sec enough? */
+#define LASTLOG_IGNORE_LOCK_TIME 1
+
+#define DEFAULT_HOST "" /* "[no.where]" */
+#define DEFAULT_TERM "" /* "tt???" */
+
+#define DEFAULT_INACTIVE_DAYS 90
+#define MAX_INACTIVE_DAYS 100000
+
+#include <security/pam_modules.h>
+#include <security/_pam_macros.h>
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+#include "pam_inline.h"
+
+/* argument parsing */
+
+#define LASTLOG_DATE 01 /* display the date of the last login */
+#define LASTLOG_HOST 02 /* display the last host used (if set) */
+#define LASTLOG_LINE 04 /* display the last terminal used */
+#define LASTLOG_NEVER 010 /* display a welcome message for first login */
+#define LASTLOG_DEBUG 020 /* send info to syslog(3) */
+#define LASTLOG_QUIET 040 /* keep quiet about things */
+#define LASTLOG_WTMP 0100 /* log to wtmp as well as lastlog */
+#define LASTLOG_BTMP 0200 /* display failed login info from btmp */
+#define LASTLOG_UPDATE 0400 /* update the lastlog and wtmp files (default) */
+#define LASTLOG_UNLIMITED 01000 /* unlimited file size (ignore 'fsize' limit) */
+
+static int
+_pam_auth_parse(pam_handle_t *pamh, int flags, int argc, const char **argv,
+ time_t *inactive)
+{
+ int ctrl = 0;
+
+ *inactive = DEFAULT_INACTIVE_DAYS;
+
+ /* does the application require quiet? */
+ if (flags & PAM_SILENT) {
+ ctrl |= LASTLOG_QUIET;
+ }
+
+ /* step through arguments */
+ for (; argc-- > 0; ++argv) {
+ const char *str;
+ char *ep = NULL;
+ long l;
+
+ if (!strcmp(*argv,"debug")) {
+ ctrl |= LASTLOG_DEBUG;
+ } else if (!strcmp(*argv,"silent")) {
+ ctrl |= LASTLOG_QUIET;
+ } else if ((str = pam_str_skip_prefix(*argv, "inactive=")) != NULL) {
+ l = strtol(str, &ep, 10);
+ if (ep != str && l > 0 && l < MAX_INACTIVE_DAYS)
+ *inactive = l;
+ else {
+ pam_syslog(pamh, LOG_ERR, "bad option value: %s", *argv);
+ }
+ } else {
+ pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+ }
+ }
+
+ D(("ctrl = %o", ctrl));
+ return ctrl;
+}
+
+static int
+_pam_session_parse(pam_handle_t *pamh, int flags, int argc, const char **argv)
+{
+ int ctrl=(LASTLOG_DATE|LASTLOG_HOST|LASTLOG_LINE|LASTLOG_WTMP|LASTLOG_UPDATE);
+
+ /* step through arguments */
+ for (; argc-- > 0; ++argv) {
+
+ /* generic options */
+
+ if (!strcmp(*argv,"debug")) {
+ ctrl |= LASTLOG_DEBUG;
+ } else if (!strcmp(*argv,"nodate")) {
+ ctrl &= ~LASTLOG_DATE;
+ } else if (!strcmp(*argv,"noterm")) {
+ ctrl &= ~LASTLOG_LINE;
+ } else if (!strcmp(*argv,"nohost")) {
+ ctrl &= ~LASTLOG_HOST;
+ } else if (!strcmp(*argv,"silent")) {
+ ctrl |= LASTLOG_QUIET;
+ } else if (!strcmp(*argv,"never")) {
+ ctrl |= LASTLOG_NEVER;
+ } else if (!strcmp(*argv,"nowtmp")) {
+ ctrl &= ~LASTLOG_WTMP;
+ } else if (!strcmp(*argv,"noupdate")) {
+ ctrl &= ~(LASTLOG_WTMP|LASTLOG_UPDATE);
+ } else if (!strcmp(*argv,"showfailed")) {
+ ctrl |= LASTLOG_BTMP;
+ } else if (!strcmp(*argv,"unlimited")) {
+ ctrl |= LASTLOG_UNLIMITED;
+ } else {
+ pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+ }
+ }
+
+ /* does the application require quiet? */
+ if (flags & PAM_SILENT) {
+ ctrl |= LASTLOG_QUIET;
+ ctrl &= ~LASTLOG_BTMP;
+ }
+
+ D(("ctrl = %o", ctrl));
+ return ctrl;
+}
+
+static const char *
+get_tty(pam_handle_t *pamh)
+{
+ const void *void_terminal_line = NULL;
+ const char *terminal_line;
+ const char *str;
+
+ if (pam_get_item(pamh, PAM_TTY, &void_terminal_line) != PAM_SUCCESS
+ || void_terminal_line == NULL) {
+ terminal_line = DEFAULT_TERM;
+ } else {
+ terminal_line = void_terminal_line;
+ }
+
+ /* strip leading "/dev/" from tty. */
+ str = pam_str_skip_prefix(terminal_line, "/dev/");
+ if (str != NULL)
+ terminal_line = str;
+
+ D(("terminal = %s", terminal_line));
+ return terminal_line;
+}
+
+#define MAX_UID_VALUE 0xFFFFFFFFUL
+
+static uid_t
+get_lastlog_uid_max(pam_handle_t *pamh)
+{
+ uid_t uid_max = MAX_UID_VALUE;
+ unsigned long ul;
+ char *s, *ep;
+
+ s = pam_modutil_search_key(pamh, PATH_LOGIN_DEFS, "LASTLOG_UID_MAX");
+ if (s == NULL)
+ return uid_max;
+
+ ep = s + strlen(s);
+ while (ep > s && isspace(*(--ep))) {
+ *ep = '\0';
+ }
+ errno = 0;
+ ul = strtoul(s, &ep, 10);
+ if (!(ul >= MAX_UID_VALUE
+ || (uid_t)ul >= MAX_UID_VALUE
+ || (errno != 0 && ul == 0)
+ || s == ep
+ || *ep != '\0')) {
+ uid_max = (uid_t)ul;
+ }
+ free(s);
+
+ return uid_max;
+}
+
+static int
+last_login_open(pam_handle_t *pamh, int announce, uid_t uid)
+{
+ int last_fd;
+
+ /* obtain the last login date and all the relevant info */
+ last_fd = open(_PATH_LASTLOG, announce&LASTLOG_UPDATE ? O_RDWR : O_RDONLY);
+ if (last_fd < 0) {
+ if (errno == ENOENT && (announce & LASTLOG_UPDATE)) {
+ last_fd = open(_PATH_LASTLOG, O_RDWR|O_CREAT,
+ S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+ if (last_fd < 0) {
+ pam_syslog(pamh, LOG_ERR,
+ "unable to create %s: %m", _PATH_LASTLOG);
+ D(("unable to create %s file", _PATH_LASTLOG));
+ return -1;
+ }
+ pam_syslog(pamh, LOG_NOTICE,
+ "file %s created", _PATH_LASTLOG);
+ D(("file %s created", _PATH_LASTLOG));
+ } else {
+ pam_syslog(pamh, LOG_ERR, "unable to open %s: %m", _PATH_LASTLOG);
+ D(("unable to open %s file", _PATH_LASTLOG));
+ return -1;
+ }
+ }
+
+ if (lseek(last_fd, sizeof(struct lastlog) * (off_t) uid, SEEK_SET) < 0) {
+ pam_syslog(pamh, LOG_ERR, "failed to lseek %s: %m", _PATH_LASTLOG);
+ D(("unable to lseek %s file", _PATH_LASTLOG));
+ close(last_fd);
+ return -1;
+ }
+
+ return last_fd;
+}
+
+
+static int
+last_login_read(pam_handle_t *pamh, int announce, int last_fd, uid_t uid, time_t *lltime)
+{
+ struct flock last_lock;
+ struct lastlog last_login;
+ int retval = PAM_SUCCESS;
+ char the_time[256];
+ char *date = NULL;
+ char *host = NULL;
+ char *line = NULL;
+
+ memset(&last_lock, 0, sizeof(last_lock));
+ last_lock.l_type = F_RDLCK;
+ last_lock.l_whence = SEEK_SET;
+ last_lock.l_start = sizeof(last_login) * (off_t) uid;
+ last_lock.l_len = sizeof(last_login);
+
+ if (fcntl(last_fd, F_SETLK, &last_lock) < 0) {
+ D(("locking %s failed..(waiting a little)", _PATH_LASTLOG));
+ pam_syslog(pamh, LOG_WARNING,
+ "file %s is locked/read", _PATH_LASTLOG);
+ sleep(LASTLOG_IGNORE_LOCK_TIME);
+ }
+
+ if (pam_modutil_read(last_fd, (char *) &last_login,
+ sizeof(last_login)) != sizeof(last_login)) {
+ memset(&last_login, 0, sizeof(last_login));
+ }
+
+ last_lock.l_type = F_UNLCK;
+ (void) fcntl(last_fd, F_SETLK, &last_lock); /* unlock */
+
+ *lltime = last_login.ll_time;
+ if (!last_login.ll_time) {
+ if (announce & LASTLOG_DEBUG) {
+ pam_syslog(pamh, LOG_DEBUG,
+ "first login for user with uid %lu",
+ (unsigned long int)uid);
+ }
+ }
+
+ if (!(announce & LASTLOG_QUIET)) {
+
+ if (last_login.ll_time) {
+
+ /* we want the date? */
+ if (announce & LASTLOG_DATE) {
+ struct tm *tm, tm_buf;
+ time_t ll_time;
+
+ ll_time = last_login.ll_time;
+ if ((tm = localtime_r (&ll_time, &tm_buf)) != NULL) {
+ strftime (the_time, sizeof (the_time),
+ /* TRANSLATORS: "strftime options for date of last login" */
+ _(" %a %b %e %H:%M:%S %Z %Y"), tm);
+ date = the_time;
+ }
+ }
+
+ /* we want & have the host? */
+ if ((announce & LASTLOG_HOST)
+ && (last_login.ll_host[0] != '\0')) {
+ /* TRANSLATORS: " from <host>" */
+ if (asprintf(&host, _(" from %.*s"), UT_HOSTSIZE,
+ last_login.ll_host) < 0) {
+ pam_syslog(pamh, LOG_CRIT, "out of memory");
+ retval = PAM_BUF_ERR;
+ goto cleanup;
+ }
+ }
+
+ /* we want and have the terminal? */
+ if ((announce & LASTLOG_LINE)
+ && (last_login.ll_line[0] != '\0')) {
+ /* TRANSLATORS: " on <terminal>" */
+ if (asprintf(&line, _(" on %.*s"), UT_LINESIZE,
+ last_login.ll_line) < 0) {
+ pam_syslog(pamh, LOG_CRIT, "out of memory");
+ retval = PAM_BUF_ERR;
+ goto cleanup;
+ }
+ }
+
+ if (date != NULL || host != NULL || line != NULL)
+ /* TRANSLATORS: "Last login: <date> from <host> on <terminal>" */
+ retval = pam_info(pamh, _("Last login:%s%s%s"),
+ date ? date : "",
+ host ? host : "",
+ line ? line : "");
+ } else if (announce & LASTLOG_NEVER) {
+ D(("this is the first time this user has logged in"));
+ retval = pam_info(pamh, "%s", _("Welcome to your new account!"));
+ }
+ }
+
+ /* cleanup */
+ cleanup:
+ memset(&last_login, 0, sizeof(last_login));
+ _pam_overwrite(date);
+ _pam_overwrite(host);
+ _pam_drop(host);
+ _pam_overwrite(line);
+ _pam_drop(line);
+
+ return retval;
+}
+
+static int
+last_login_write(pam_handle_t *pamh, int announce, int last_fd,
+ uid_t uid, const char *user)
+{
+ static struct rlimit no_limit = {
+ RLIM_INFINITY,
+ RLIM_INFINITY
+ };
+ struct rlimit old_limit;
+ int setrlimit_res;
+ struct flock last_lock;
+ struct lastlog last_login;
+ time_t ll_time;
+ const void *void_remote_host = NULL;
+ const char *remote_host;
+ const char *terminal_line;
+ int retval = PAM_SUCCESS;
+
+ /* rewind */
+ if (lseek(last_fd, sizeof(last_login) * (off_t) uid, SEEK_SET) < 0) {
+ pam_syslog(pamh, LOG_ERR, "failed to lseek %s: %m", _PATH_LASTLOG);
+ return PAM_SERVICE_ERR;
+ }
+
+ memset(&last_login, 0, sizeof(last_login));
+
+ /* set this login date */
+ D(("set the most recent login time"));
+ (void) time(&ll_time); /* set the time */
+ last_login.ll_time = ll_time;
+
+ /* set the remote host */
+ if (pam_get_item(pamh, PAM_RHOST, &void_remote_host) != PAM_SUCCESS
+ || void_remote_host == NULL) {
+ remote_host = DEFAULT_HOST;
+ } else {
+ remote_host = void_remote_host;
+ }
+
+ /* copy to last_login */
+ strncat(last_login.ll_host, remote_host, sizeof(last_login.ll_host)-1);
+
+ /* set the terminal line */
+ terminal_line = get_tty(pamh);
+
+ /* copy to last_login */
+ strncat(last_login.ll_line, terminal_line, sizeof(last_login.ll_line)-1);
+ terminal_line = NULL;
+
+ D(("locking lastlog file"));
+
+ /* now we try to lock this file-record exclusively; non-blocking */
+ memset(&last_lock, 0, sizeof(last_lock));
+ last_lock.l_type = F_WRLCK;
+ last_lock.l_whence = SEEK_SET;
+ last_lock.l_start = sizeof(last_login) * (off_t) uid;
+ last_lock.l_len = sizeof(last_login);
+
+ if (fcntl(last_fd, F_SETLK, &last_lock) < 0) {
+ D(("locking %s failed..(waiting a little)", _PATH_LASTLOG));
+ pam_syslog(pamh, LOG_WARNING, "file %s is locked/write", _PATH_LASTLOG);
+ sleep(LASTLOG_IGNORE_LOCK_TIME);
+ }
+
+ /*
+ * Failing to set the 'fsize' limit is not a fatal error. We try to write
+ * lastlog anyway, under the risk of dying due to a SIGXFSZ.
+ */
+ D(("setting limit for 'fsize'"));
+
+ if ((announce & LASTLOG_UNLIMITED) == 0) { /* don't set to unlimited */
+ setrlimit_res = -1;
+ } else if (getrlimit(RLIMIT_FSIZE, &old_limit) == 0) {
+ if (old_limit.rlim_cur == RLIM_INFINITY) { /* already unlimited */
+ setrlimit_res = -1;
+ } else {
+ setrlimit_res = setrlimit(RLIMIT_FSIZE, &no_limit);
+ if (setrlimit_res != 0)
+ pam_syslog(pamh, LOG_WARNING, "Could not set limit for 'fsize': %m");
+ }
+ } else {
+ setrlimit_res = -1;
+ if (errno == EINVAL) {
+ pam_syslog(pamh, LOG_INFO, "Limit for 'fsize' not supported: %m");
+ } else {
+ pam_syslog(pamh, LOG_WARNING, "Could not get limit for 'fsize': %m");
+ }
+ }
+
+ D(("writing to the lastlog file"));
+ if (pam_modutil_write (last_fd, (char *) &last_login,
+ sizeof (last_login)) != sizeof(last_login)) {
+ pam_syslog(pamh, LOG_ERR, "failed to write %s: %m", _PATH_LASTLOG);
+ retval = PAM_SERVICE_ERR;
+ }
+
+ /*
+ * Failing to restore the 'fsize' limit is a fatal error.
+ */
+ D(("restoring limit for 'fsize'"));
+ if (setrlimit_res == 0) {
+ setrlimit_res = setrlimit(RLIMIT_FSIZE, &old_limit);
+ if (setrlimit_res != 0) {
+ pam_syslog(pamh, LOG_ERR, "Could not restore limit for 'fsize': %m");
+ retval = PAM_SERVICE_ERR;
+ }
+ }
+
+ last_lock.l_type = F_UNLCK;
+ (void) fcntl(last_fd, F_SETLK, &last_lock); /* unlock */
+ D(("unlocked"));
+
+ if (announce & LASTLOG_WTMP) {
+ /* write wtmp entry for user */
+ logwtmp(last_login.ll_line, user, remote_host);
+ }
+
+ /* cleanup */
+ memset(&last_login, 0, sizeof(last_login));
+
+ return retval;
+}
+
+static int
+last_login_date(pam_handle_t *pamh, int announce, uid_t uid, const char *user, time_t *lltime)
+{
+ int retval;
+ int last_fd;
+
+ if (uid > get_lastlog_uid_max(pamh)) {
+ return PAM_SUCCESS;
+ }
+
+ /* obtain the last login date and all the relevant info */
+ last_fd = last_login_open(pamh, announce, uid);
+ if (last_fd < 0) {
+ return PAM_SERVICE_ERR;
+ }
+
+ retval = last_login_read(pamh, announce, last_fd, uid, lltime);
+ if (retval != PAM_SUCCESS)
+ {
+ close(last_fd);
+ D(("error while reading lastlog file"));
+ return retval;
+ }
+
+ if (announce & LASTLOG_UPDATE) {
+ retval = last_login_write(pamh, announce, last_fd, uid, user);
+ }
+
+ close(last_fd);
+ D(("all done with last login"));
+
+ return retval;
+}
+
+static int
+last_login_failed(pam_handle_t *pamh, int announce, const char *user, time_t lltime)
+{
+ int retval;
+ int fd;
+ struct utmp ut;
+ struct utmp utuser;
+ int failed = 0;
+ char the_time[256];
+ char *date = NULL;
+ char *host = NULL;
+ char *line = NULL;
+
+ if (strlen(user) > UT_NAMESIZE) {
+ pam_syslog(pamh, LOG_WARNING, "username too long, output might be inaccurate");
+ }
+
+ /* obtain the failed login attempt records from btmp */
+ fd = open(_PATH_BTMP, O_RDONLY);
+ if (fd < 0) {
+ int save_errno = errno;
+ pam_syslog(pamh, LOG_ERR, "unable to open %s: %m", _PATH_BTMP);
+ D(("unable to open %s file", _PATH_BTMP));
+ if (save_errno == ENOENT)
+ return PAM_SUCCESS;
+ else
+ return PAM_SERVICE_ERR;
+ }
+
+ while ((retval=pam_modutil_read(fd, (void *)&ut,
+ sizeof(ut))) == sizeof(ut)) {
+ if (ut.ut_tv.tv_sec >= lltime && strncmp(ut.ut_user, user, UT_NAMESIZE) == 0) {
+ memcpy(&utuser, &ut, sizeof(utuser));
+ failed++;
+ }
+ }
+
+ if (retval != 0)
+ pam_syslog(pamh, LOG_ERR, "corruption detected in %s", _PATH_BTMP);
+ retval = PAM_SUCCESS;
+
+ if (failed) {
+ /* we want the date? */
+ if (announce & LASTLOG_DATE) {
+ struct tm *tm, tm_buf;
+ time_t lf_time;
+
+ lf_time = utuser.ut_tv.tv_sec;
+ tm = localtime_r (&lf_time, &tm_buf);
+ strftime (the_time, sizeof (the_time),
+ /* TRANSLATORS: "strftime options for date of last login" */
+ _(" %a %b %e %H:%M:%S %Z %Y"), tm);
+
+ date = the_time;
+ }
+
+ /* we want & have the host? */
+ if ((announce & LASTLOG_HOST)
+ && (utuser.ut_host[0] != '\0')) {
+ /* TRANSLATORS: " from <host>" */
+ if (asprintf(&host, _(" from %.*s"), UT_HOSTSIZE,
+ utuser.ut_host) < 0) {
+ pam_syslog(pamh, LOG_CRIT, "out of memory");
+ retval = PAM_BUF_ERR;
+ goto cleanup;
+ }
+ }
+
+ /* we want and have the terminal? */
+ if ((announce & LASTLOG_LINE)
+ && (utuser.ut_line[0] != '\0')) {
+ /* TRANSLATORS: " on <terminal>" */
+ if (asprintf(&line, _(" on %.*s"), UT_LINESIZE,
+ utuser.ut_line) < 0) {
+ pam_syslog(pamh, LOG_CRIT, "out of memory");
+ retval = PAM_BUF_ERR;
+ goto cleanup;
+ }
+ }
+
+ if (line != NULL || date != NULL || host != NULL) {
+ /* TRANSLATORS: "Last failed login: <date> from <host> on <terminal>" */
+ pam_info(pamh, _("Last failed login:%s%s%s"),
+ date ? date : "",
+ host ? host : "",
+ line ? line : "");
+ }
+
+ _pam_drop(line);
+#if defined HAVE_DNGETTEXT && defined ENABLE_NLS
+ retval = asprintf (&line, dngettext(PACKAGE,
+ "There was %d failed login attempt since the last successful login.",
+ "There were %d failed login attempts since the last successful login.",
+ failed),
+ failed);
+#else
+ if (failed == 1)
+ retval = asprintf(&line,
+ _("There was %d failed login attempt since the last successful login."),
+ failed);
+ else
+ retval = asprintf(&line,
+ /* TRANSLATORS: only used if dngettext is not supported */
+ _("There were %d failed login attempts since the last successful login."),
+ failed);
+#endif
+ if (retval >= 0)
+ retval = pam_info(pamh, "%s", line);
+ else {
+ retval = PAM_BUF_ERR;
+ line = NULL;
+ }
+ }
+
+cleanup:
+ free(host);
+ free(line);
+ close(fd);
+ D(("all done with btmp"));
+
+ return retval;
+}
+
+/* --- authentication (locking out inactive users) functions --- */
+int
+pam_sm_authenticate(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int retval, ctrl;
+ const char *user = NULL;
+ const struct passwd *pwd;
+ uid_t uid;
+ time_t lltime = 0;
+ time_t inactive_days = 0;
+ int last_fd;
+
+ /*
+ * Lock out the user if he did not login recently enough.
+ */
+
+ ctrl = _pam_auth_parse(pamh, flags, argc, argv, &inactive_days);
+
+ /* which user? */
+
+ if (pam_get_user(pamh, &user, NULL) != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_NOTICE, "cannot determine user name");
+ return PAM_USER_UNKNOWN;
+ }
+
+ /* what uid? */
+
+ pwd = pam_modutil_getpwnam (pamh, user);
+ if (pwd == NULL) {
+ pam_syslog(pamh, LOG_NOTICE, "user unknown");
+ return PAM_USER_UNKNOWN;
+ }
+ uid = pwd->pw_uid;
+ pwd = NULL; /* tidy up */
+
+ if (uid == 0 || uid > get_lastlog_uid_max(pamh))
+ return PAM_SUCCESS;
+
+ /* obtain the last login date and all the relevant info */
+ last_fd = last_login_open(pamh, ctrl, uid);
+ if (last_fd < 0) {
+ return PAM_IGNORE;
+ }
+
+ retval = last_login_read(pamh, ctrl|LASTLOG_QUIET, last_fd, uid, &lltime);
+ close(last_fd);
+
+ if (retval != PAM_SUCCESS) {
+ D(("error while reading lastlog file"));
+ return PAM_IGNORE;
+ }
+
+ if (lltime == 0) { /* user never logged in before */
+ if (ctrl & LASTLOG_DEBUG)
+ pam_syslog(pamh, LOG_DEBUG, "user never logged in - pass");
+ return PAM_SUCCESS;
+ }
+
+ lltime = (time(NULL) - lltime) / (24*60*60);
+
+ if (lltime > inactive_days) {
+ pam_syslog(pamh, LOG_INFO, "user %s inactive for %ld days - denied",
+ user, (long) lltime);
+ return PAM_AUTH_ERR;
+ }
+
+ return PAM_SUCCESS;
+}
+
+int
+pam_sm_setcred(pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ return PAM_SUCCESS;
+}
+
+int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+/* --- session management functions --- */
+
+int
+pam_sm_open_session(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int retval, ctrl;
+ const void *user;
+ const struct passwd *pwd;
+ uid_t uid;
+ time_t lltime = 0;
+
+ /*
+ * this module gets the uid of the PAM_USER. Uses it to display
+ * last login info and then updates the lastlog for that user.
+ */
+
+ ctrl = _pam_session_parse(pamh, flags, argc, argv);
+
+ /* which user? */
+
+ retval = pam_get_item(pamh, PAM_USER, &user);
+ if (retval != PAM_SUCCESS || user == NULL || *(const char *)user == '\0') {
+ pam_syslog(pamh, LOG_NOTICE, "user unknown");
+ return PAM_USER_UNKNOWN;
+ }
+
+ /* what uid? */
+
+ pwd = pam_modutil_getpwnam (pamh, user);
+ if (pwd == NULL) {
+ D(("couldn't identify user %s", user));
+ return PAM_USER_UNKNOWN;
+ }
+ uid = pwd->pw_uid;
+ pwd = NULL; /* tidy up */
+
+ /* process the current login attempt (indicate last) */
+
+ retval = last_login_date(pamh, ctrl, uid, user, &lltime);
+
+ if ((ctrl & LASTLOG_BTMP) && retval == PAM_SUCCESS) {
+ retval = last_login_failed(pamh, ctrl, user, lltime);
+ }
+
+ /* indicate success or failure */
+
+ uid = -1; /* forget this */
+
+ return retval;
+}
+
+int
+pam_sm_close_session (pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ const char *terminal_line;
+
+ if (!(_pam_session_parse(pamh, flags, argc, argv) & LASTLOG_WTMP))
+ return PAM_SUCCESS;
+
+ terminal_line = get_tty(pamh);
+
+ /* Wipe out utmp logout entry */
+ logwtmp(terminal_line, "", "");
+
+ return PAM_SUCCESS;
+}
+
+/* end of module definition */
diff --git a/modules/pam_lastlog/tst-pam_lastlog b/modules/pam_lastlog/tst-pam_lastlog
new file mode 100755
index 0000000..ea9a5eb
--- /dev/null
+++ b/modules/pam_lastlog/tst-pam_lastlog
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_lastlog.so
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 14:57:22 +0000