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-rw-r--r--modules/pam_env/Makefile.am37
-rw-r--r--modules/pam_env/Makefile.in1211
-rw-r--r--modules/pam_env/README96
-rw-r--r--modules/pam_env/README.xml39
-rw-r--r--modules/pam_env/environment5
-rw-r--r--modules/pam_env/environment.51
-rw-r--r--modules/pam_env/pam_env.8158
-rw-r--r--modules/pam_env/pam_env.8.xml263
-rw-r--r--modules/pam_env/pam_env.c882
-rw-r--r--modules/pam_env/pam_env.conf73
-rw-r--r--modules/pam_env/pam_env.conf.5132
-rw-r--r--modules/pam_env/pam_env.conf.5.xml136
-rwxr-xr-xmodules/pam_env/tst-pam_env2
13 files changed, 3035 insertions, 0 deletions
diff --git a/modules/pam_env/Makefile.am b/modules/pam_env/Makefile.am
new file mode 100644
index 0000000..d6f081f
--- /dev/null
+++ b/modules/pam_env/Makefile.am
@@ -0,0 +1,37 @@
+#
+# Copyright (c) 2005, 2009 Thorsten Kukuk <kukuk@suse.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = README pam_env.conf $(MANS) $(XMLS) tst-pam_env environment
+
+man_MANS = pam_env.conf.5 pam_env.8 environment.5
+
+XMLS = README.xml pam_env.conf.5.xml pam_env.8.xml
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ -DDEFAULT_CONF_FILE=\"$(SCONFIGDIR)/pam_env.conf\"
+AM_LDFLAGS = -no-undefined -avoid-version -module
+if HAVE_VERSIONING
+ AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_env.la
+pam_env_la_LIBADD = $(top_builddir)/libpam/libpam.la
+
+secureconf_DATA = pam_env.conf
+sysconf_DATA = environment
+
+if ENABLE_REGENERATE_MAN
+noinst_DATA = README
+README: pam_env.8.xml pam_env.conf.5.xml
+environment.5: pam_env.conf.5.xml
+-include $(top_srcdir)/Make.xml.rules
+endif
+
+TESTS = tst-pam_env
diff --git a/modules/pam_env/Makefile.in b/modules/pam_env/Makefile.in
new file mode 100644
index 0000000..87ae8c0
--- /dev/null
+++ b/modules/pam_env/Makefile.in
@@ -0,0 +1,1211 @@
+# Makefile.in generated by automake 1.13.4 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# 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
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+#
+# Copyright (c) 2005, 2009 Thorsten Kukuk <kukuk@suse.de>
+#
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+recheck: all
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+distdir: $(DISTFILES)
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+ dist_files=`for file in $$list; do echo $$file; done | \
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+ sort -u` ;; \
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+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
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+ fi
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+ install-exec install-exec-am install-html install-html-am \
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+@ENABLE_REGENERATE_MAN_TRUE@README: pam_env.8.xml pam_env.conf.5.xml
+@ENABLE_REGENERATE_MAN_TRUE@environment.5: pam_env.conf.5.xml
+@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/modules/pam_env/README b/modules/pam_env/README
new file mode 100644
index 0000000..65a35ce
--- /dev/null
+++ b/modules/pam_env/README
@@ -0,0 +1,96 @@
+pam_env — PAM module to set/unset environment variables
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+The pam_env PAM module allows the (un)setting of environment variables.
+Supported is the use of previously set environment variables as well as
+PAM_ITEMs such as PAM_RHOST.
+
+By default rules for (un)setting of variables are taken from the config file /
+etc/security/pam_env.conf. An alternate file can be specified with the conffile
+option.
+
+Second a file (/etc/environment by default) with simple KEY=VAL pairs on
+separate lines will be read. With the envfile option an alternate file can be
+specified. And with the readenv option this can be completly disabled.
+
+Third it will read a user configuration file ($HOME/.pam_environment by
+default). The default file file can be changed with the user_envfile option and
+it can be turned on and off with the user_readenv option.
+
+Since setting of PAM environment variables can have side effects to other
+modules, this module should be the last one on the stack.
+
+OPTIONS
+
+conffile=/path/to/pam_env.conf
+
+ Indicate an alternative pam_env.conf style configuration file to override
+ the default. This can be useful when different services need different
+ environments.
+
+debug
+
+ A lot of debug information is printed with syslog(3).
+
+envfile=/path/to/environment
+
+ Indicate an alternative environment file to override the default. The
+ syntax are simple KEY=VAL pairs on separate lines. The export instruction
+ can be specified for bash compatibility, but will be ignored. This can be
+ useful when different services need different environments.
+
+readenv=0|1
+
+ Turns on or off the reading of the file specified by envfile (0 is off, 1
+ is on). By default this option is on.
+
+user_envfile=filename
+
+ Indicate an alternative .pam_environment file to override the default.The
+ syntax is the same as for /etc/environment. The filename is relative to the
+ user home directory. This can be useful when different services need
+ different environments.
+
+user_readenv=0|1
+
+ Turns on or off the reading of the user specific environment file. 0 is
+ off, 1 is on. By default this option is on.
+
+EXAMPLES
+
+These are some example lines which might be specified in /etc/security/
+pam_env.conf.
+
+Set the REMOTEHOST variable for any hosts that are remote, default to
+"localhost" rather than not being set at all
+
+ REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
+
+
+Set the DISPLAY variable if it seems reasonable
+
+ DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY}
+
+
+Now some simple variables
+
+ PAGER DEFAULT=less
+ MANPAGER DEFAULT=less
+ LESS DEFAULT="M q e h15 z23 b80"
+ NNTPSERVER DEFAULT=localhost
+ PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin\
+ :/usr/bin:/usr/local/bin/X11:/usr/bin/X11
+ XDG_DATA_HOME @{HOME}/share/
+
+
+Silly examples of escaped variables, just to show how they work.
+
+ DOLLAR DEFAULT=\$
+ DOLLARDOLLAR DEFAULT= OVERRIDE=\$${DOLLAR}
+ DOLLARPLUS DEFAULT=\${REMOTEHOST}${REMOTEHOST}
+ ATSIGN DEFAULT="" OVERRIDE=\@
+
+
diff --git a/modules/pam_env/README.xml b/modules/pam_env/README.xml
new file mode 100644
index 0000000..21a9b85
--- /dev/null
+++ b/modules/pam_env/README.xml
@@ -0,0 +1,39 @@
+<?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_env.8.xml">
+-->
+<!--
+<!ENTITY accessconf SYSTEM "pam_env.conf.5.xml">
+-->
+]>
+
+<article>
+
+ <articleinfo>
+
+ <title>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_env.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_env-name"]/*)'/>
+ </title>
+
+ </articleinfo>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_env.8.xml" xpointer='xpointer(//refsect1[@id = "pam_env-description"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_env.8.xml" xpointer='xpointer(//refsect1[@id = "pam_env-options"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_env.conf.5.xml" xpointer='xpointer(//refsect1[@id = "pam_env.conf-examples"]/*)'/>
+ </section>
+
+</article>
diff --git a/modules/pam_env/environment b/modules/pam_env/environment
new file mode 100644
index 0000000..3e704a6
--- /dev/null
+++ b/modules/pam_env/environment
@@ -0,0 +1,5 @@
+#
+# This file is parsed by pam_env module
+#
+# Syntax: simple "KEY=VAL" pairs on separate lines
+#
diff --git a/modules/pam_env/environment.5 b/modules/pam_env/environment.5
new file mode 100644
index 0000000..415dfc1
--- /dev/null
+++ b/modules/pam_env/environment.5
@@ -0,0 +1 @@
+.so pam_env.conf.5
diff --git a/modules/pam_env/pam_env.8 b/modules/pam_env/pam_env.8
new file mode 100644
index 0000000..2a3ea16
--- /dev/null
+++ b/modules/pam_env/pam_env.8
@@ -0,0 +1,158 @@
+'\" t
+.\" Title: pam_env
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\" Date: 05/18/2017
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_ENV" "8" "05/18/2017" "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_env \- PAM module to set/unset environment variables
+.SH "SYNOPSIS"
+.HP \w'\fBpam_env\&.so\fR\ 'u
+\fBpam_env\&.so\fR [debug] [conffile=\fIconf\-file\fR] [envfile=\fIenv\-file\fR] [readenv=\fI0|1\fR] [user_envfile=\fIenv\-file\fR] [user_readenv=\fI0|1\fR]
+.SH "DESCRIPTION"
+.PP
+The pam_env PAM module allows the (un)setting of environment variables\&. Supported is the use of previously set environment variables as well as
+\fIPAM_ITEM\fRs such as
+\fIPAM_RHOST\fR\&.
+.PP
+By default rules for (un)setting of variables are taken from the config file
+/etc/security/pam_env\&.conf\&. An alternate file can be specified with the
+\fIconffile\fR
+option\&.
+.PP
+Second a file (/etc/environment
+by default) with simple
+\fIKEY=VAL\fR
+pairs on separate lines will be read\&. With the
+\fIenvfile\fR
+option an alternate file can be specified\&. And with the
+\fIreadenv\fR
+option this can be completly disabled\&.
+.PP
+Third it will read a user configuration file ($HOME/\&.pam_environment
+by default)\&. The default file file can be changed with the
+\fIuser_envfile\fR
+option and it can be turned on and off with the
+\fIuser_readenv\fR
+option\&.
+.PP
+Since setting of PAM environment variables can have side effects to other modules, this module should be the last one on the stack\&.
+.SH "OPTIONS"
+.PP
+\fBconffile=\fR\fB\fI/path/to/pam_env\&.conf\fR\fR
+.RS 4
+Indicate an alternative
+pam_env\&.conf
+style configuration file to override the default\&. This can be useful when different services need different environments\&.
+.RE
+.PP
+\fBdebug\fR
+.RS 4
+A lot of debug information is printed with
+\fBsyslog\fR(3)\&.
+.RE
+.PP
+\fBenvfile=\fR\fB\fI/path/to/environment\fR\fR
+.RS 4
+Indicate an alternative
+environment
+file to override the default\&. The syntax are simple
+\fIKEY=VAL\fR
+pairs on separate lines\&. The
+\fIexport\fR
+instruction can be specified for bash compatibility, but will be ignored\&. This can be useful when different services need different environments\&.
+.RE
+.PP
+\fBreadenv=\fR\fB\fI0|1\fR\fR
+.RS 4
+Turns on or off the reading of the file specified by envfile (0 is off, 1 is on)\&. By default this option is on\&.
+.RE
+.PP
+\fBuser_envfile=\fR\fB\fIfilename\fR\fR
+.RS 4
+Indicate an alternative
+\&.pam_environment
+file to override the default\&.The syntax is the same as for
+\fI/etc/environment\fR\&. The filename is relative to the user home directory\&. This can be useful when different services need different environments\&.
+.RE
+.PP
+\fBuser_readenv=\fR\fB\fI0|1\fR\fR
+.RS 4
+Turns on or off the reading of the user specific environment file\&. 0 is off, 1 is on\&. By default this option is on\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+The
+\fBauth\fR
+and
+\fBsession\fR
+module types are provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_ABORT
+.RS 4
+Not all relevant data or options could be gotten\&.
+.RE
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_IGNORE
+.RS 4
+No pam_env\&.conf and environment file was found\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+Environment variables were set\&.
+.RE
+.SH "FILES"
+.PP
+/etc/security/pam_env\&.conf
+.RS 4
+Default configuration file
+.RE
+.PP
+/etc/environment
+.RS 4
+Default environment file
+.RE
+.PP
+$HOME/\&.pam_environment
+.RS 4
+User specific environment file
+.RE
+.SH "SEE ALSO"
+.PP
+\fBpam_env.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8),
+\fBenviron\fR(7)\&.
+.SH "AUTHOR"
+.PP
+pam_env was written by Dave Kinchlea <kinch@kinch\&.ark\&.com>\&.
diff --git a/modules/pam_env/pam_env.8.xml b/modules/pam_env/pam_env.8.xml
new file mode 100644
index 0000000..d6e20a2
--- /dev/null
+++ b/modules/pam_env/pam_env.8.xml
@@ -0,0 +1,263 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
+
+<refentry id='pam_env'>
+
+ <refmeta>
+ <refentrytitle>pam_env</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id='pam_env-name'>
+ <refname>pam_env</refname>
+ <refpurpose>
+ PAM module to set/unset environment variables
+ </refpurpose>
+ </refnamediv>
+
+<!-- body begins here -->
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pam_env-cmdsynopsis">
+ <command>pam_env.so</command>
+ <arg choice="opt">
+ debug
+ </arg>
+ <arg choice="opt">
+ conffile=<replaceable>conf-file</replaceable>
+ </arg>
+ <arg choice="opt">
+ envfile=<replaceable>env-file</replaceable>
+ </arg>
+ <arg choice="opt">
+ readenv=<replaceable>0|1</replaceable>
+ </arg>
+ <arg choice="opt">
+ user_envfile=<replaceable>env-file</replaceable>
+ </arg>
+ <arg choice="opt">
+ user_readenv=<replaceable>0|1</replaceable>
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+
+ <refsect1 id="pam_env-description">
+ <title>DESCRIPTION</title>
+ <para>
+ The pam_env PAM module allows the (un)setting of environment
+ variables. Supported is the use of previously set environment
+ variables as well as <emphasis>PAM_ITEM</emphasis>s such as
+ <emphasis>PAM_RHOST</emphasis>.
+ </para>
+ <para>
+ By default rules for (un)setting of variables are taken from the
+ config file <filename>/etc/security/pam_env.conf</filename>. An
+ alternate file can be specified with the <emphasis>conffile</emphasis>
+ option.
+ </para>
+ <para>
+ Second a file (<filename>/etc/environment</filename> by default) with simple
+ <emphasis>KEY=VAL</emphasis> pairs on separate lines will be read.
+ With the <emphasis>envfile</emphasis> option an alternate file can be specified.
+ And with the <emphasis>readenv</emphasis> option this can be completly disabled.
+ </para>
+ <para>
+ Third it will read a user configuration file
+ (<filename>$HOME/.pam_environment</filename> by default).
+ The default file file can be changed with the
+ <emphasis>user_envfile</emphasis> option
+ and it can be turned on and off with the <emphasis>user_readenv</emphasis> option.
+ </para>
+ <para>
+ Since setting of PAM environment variables can have side effects
+ to other modules, this module should be the last one on the stack.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_env-options">
+ <title>OPTIONS</title>
+ <variablelist>
+
+ <varlistentry>
+ <term>
+ <option>conffile=<replaceable>/path/to/pam_env.conf</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Indicate an alternative <filename>pam_env.conf</filename>
+ style configuration file to override the default. This can
+ be useful when different services need different environments.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>debug</option>
+ </term>
+ <listitem>
+ <para>
+ A lot of debug information is printed with
+ <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>envfile=<replaceable>/path/to/environment</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Indicate an alternative <filename>environment</filename>
+ file to override the default. The syntax are simple
+ <emphasis>KEY=VAL</emphasis> pairs on separate lines. The
+ <emphasis>export</emphasis> instruction can be specified for bash
+ compatibility, but will be ignored.
+ This can be useful when different services need different environments.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>readenv=<replaceable>0|1</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Turns on or off the reading of the file specified by envfile
+ (0 is off, 1 is on). By default this option is on.
+ </para>
+ </listitem>
+ </varlistentry>
+
+
+ <varlistentry>
+ <term>
+ <option>user_envfile=<replaceable>filename</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Indicate an alternative <filename>.pam_environment</filename>
+ file to override the default.The syntax is the same as
+ for <emphasis>/etc/environment</emphasis>.
+ The filename is relative to the user home directory.
+ This can be useful when different services need different
+ environments.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>user_readenv=<replaceable>0|1</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Turns on or off the reading of the user specific environment
+ file. 0 is off, 1 is on. By default this option is on.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_env-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ The <option>auth</option> and <option>session</option> module
+ types are provided.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_env-return_values">
+ <title>RETURN VALUES</title>
+ <variablelist>
+ <varlistentry>
+ <term>PAM_ABORT</term>
+ <listitem>
+ <para>
+ Not all relevant data or options could be gotten.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_BUF_ERR</term>
+ <listitem>
+ <para>
+ Memory buffer error.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_IGNORE</term>
+ <listitem>
+ <para>
+ No pam_env.conf and environment file was found.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_SUCCESS</term>
+ <listitem>
+ <para>
+ Environment variables were set.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_env-files">
+ <title>FILES</title>
+ <variablelist>
+ <varlistentry>
+ <term><filename>/etc/security/pam_env.conf</filename></term>
+ <listitem>
+ <para>Default configuration file</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><filename>/etc/environment</filename></term>
+ <listitem>
+ <para>Default environment file</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><filename>$HOME/.pam_environment</filename></term>
+ <listitem>
+ <para>User specific environment file</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_env-see_also">
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>pam_env.conf</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum>
+ </citerefentry>.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_env-authors">
+ <title>AUTHOR</title>
+ <para>
+ pam_env was written by Dave Kinchlea &lt;kinch@kinch.ark.com&gt;.
+ </para>
+ </refsect1>
+</refentry>
diff --git a/modules/pam_env/pam_env.c b/modules/pam_env/pam_env.c
new file mode 100644
index 0000000..3846e35
--- /dev/null
+++ b/modules/pam_env/pam_env.c
@@ -0,0 +1,882 @@
+/* pam_env module */
+
+/*
+ * Written by Dave Kinchlea <kinch@kinch.ark.com> 1997/01/31
+ * Inspired by Andrew Morgan <morgan@kernel.org>, who also supplied the
+ * template for this file (via pam_mail)
+ */
+
+#define DEFAULT_ETC_ENVFILE "/etc/environment"
+#define DEFAULT_READ_ENVFILE 1
+
+#define DEFAULT_USER_ENVFILE ".pam_environment"
+#define DEFAULT_USER_READ_ENVFILE 1
+
+#include "config.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <pwd.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+/*
+ * here, we make a definition for the externally accessible function
+ * in this file (this definition is required for static a module
+ * but strongly encouraged generally) it is used to instruct the
+ * modules include file to define the function prototypes.
+ */
+
+#define PAM_SM_AUTH /* This is primarily a AUTH_SETCRED module */
+#define PAM_SM_SESSION /* But I like to be friendly */
+#define PAM_SM_PASSWORD /* "" */
+#define PAM_SM_ACCOUNT /* "" */
+
+#include <security/pam_modules.h>
+#include <security/pam_modutil.h>
+#include <security/_pam_macros.h>
+#include <security/pam_ext.h>
+
+/* This little structure makes it easier to keep variables together */
+
+typedef struct var {
+ char *name;
+ char *value;
+ char *defval;
+ char *override;
+} VAR;
+
+#define BUF_SIZE 1024
+#define MAX_ENV 8192
+
+#define GOOD_LINE 0
+#define BAD_LINE 100 /* This must be > the largest PAM_* error code */
+
+#define DEFINE_VAR 101
+#define UNDEFINE_VAR 102
+#define ILLEGAL_VAR 103
+
+static int _assemble_line(FILE *, char *, int);
+static int _parse_line(const pam_handle_t *, char *, VAR *);
+static int _check_var(pam_handle_t *, VAR *); /* This is the real meat */
+static void _clean_var(VAR *);
+static int _expand_arg(pam_handle_t *, char **);
+static const char * _pam_get_item_byname(pam_handle_t *, const char *);
+static int _define_var(pam_handle_t *, int, VAR *);
+static int _undefine_var(pam_handle_t *, int, VAR *);
+
+/* This is a flag used to designate an empty string */
+static char quote='Z';
+
+/* argument parsing */
+
+#define PAM_DEBUG_ARG 0x01
+
+static int
+_pam_parse (const pam_handle_t *pamh, int argc, const char **argv,
+ const char **conffile, const char **envfile, int *readenv,
+ const char **user_envfile, int *user_readenv)
+{
+ int ctrl=0;
+
+ *user_envfile = DEFAULT_USER_ENVFILE;
+ *envfile = DEFAULT_ETC_ENVFILE;
+ *readenv = DEFAULT_READ_ENVFILE;
+ *user_readenv = DEFAULT_USER_READ_ENVFILE;
+ *conffile = DEFAULT_CONF_FILE;
+
+ /* step through arguments */
+ for (; argc-- > 0; ++argv) {
+
+ /* generic options */
+
+ if (!strcmp(*argv,"debug"))
+ ctrl |= PAM_DEBUG_ARG;
+ else if (!strncmp(*argv,"conffile=",9)) {
+ if ((*argv)[9] == '\0') {
+ pam_syslog(pamh, LOG_ERR,
+ "conffile= specification missing argument - ignored");
+ } else {
+ *conffile = 9+*argv;
+ D(("new Configuration File: %s", *conffile));
+ }
+ } else if (!strncmp(*argv,"envfile=",8)) {
+ if ((*argv)[8] == '\0') {
+ pam_syslog (pamh, LOG_ERR,
+ "envfile= specification missing argument - ignored");
+ } else {
+ *envfile = 8+*argv;
+ D(("new Env File: %s", *envfile));
+ }
+ } else if (!strncmp(*argv,"user_envfile=",13)) {
+ if ((*argv)[13] == '\0') {
+ pam_syslog (pamh, LOG_ERR,
+ "user_envfile= specification missing argument - ignored");
+ } else {
+ *user_envfile = 13+*argv;
+ D(("new User Env File: %s", *user_envfile));
+ }
+ } else if (!strncmp(*argv,"readenv=",8))
+ *readenv = atoi(8+*argv);
+ else if (!strncmp(*argv,"user_readenv=",13))
+ *user_readenv = atoi(13+*argv);
+ else
+ pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+ }
+
+ return ctrl;
+}
+
+static int
+_parse_config_file(pam_handle_t *pamh, int ctrl, const char *file)
+{
+ int retval;
+ char buffer[BUF_SIZE];
+ FILE *conf;
+ VAR Var, *var=&Var;
+
+ D(("Called."));
+
+ var->name=NULL; var->defval=NULL; var->override=NULL;
+
+ D(("Config file name is: %s", file));
+
+ /*
+ * Lets try to open the config file, parse it and process
+ * any variables found.
+ */
+
+ if ((conf = fopen(file,"r")) == NULL) {
+ pam_syslog(pamh, LOG_ERR, "Unable to open config file: %s: %m", file);
+ return PAM_IGNORE;
+ }
+
+ /* _pam_assemble_line will provide a complete line from the config file,
+ * with all comments removed and any escaped newlines fixed up
+ */
+
+ while (( retval = _assemble_line(conf, buffer, BUF_SIZE)) > 0) {
+ D(("Read line: %s", buffer));
+
+ if ((retval = _parse_line(pamh, buffer, var)) == GOOD_LINE) {
+ retval = _check_var(pamh, var);
+
+ if (DEFINE_VAR == retval) {
+ retval = _define_var(pamh, ctrl, var);
+
+ } else if (UNDEFINE_VAR == retval) {
+ retval = _undefine_var(pamh, ctrl, var);
+ }
+ }
+ if (PAM_SUCCESS != retval && ILLEGAL_VAR != retval
+ && BAD_LINE != retval && PAM_BAD_ITEM != retval) break;
+
+ _clean_var(var);
+
+ } /* while */
+
+ (void) fclose(conf);
+
+ /* tidy up */
+ _clean_var(var); /* We could have got here prematurely,
+ * this is safe though */
+ D(("Exit."));
+ return (retval != 0 ? PAM_ABORT : PAM_SUCCESS);
+}
+
+static int
+_parse_env_file(pam_handle_t *pamh, int ctrl, const char *file)
+{
+ int retval=PAM_SUCCESS, i, t;
+ char buffer[BUF_SIZE], *key, *mark;
+ FILE *conf;
+
+ D(("Env file name is: %s", file));
+
+ if ((conf = fopen(file,"r")) == NULL) {
+ pam_syslog(pamh, LOG_ERR, "Unable to open env file: %s: %m", file);
+ return PAM_IGNORE;
+ }
+
+ while (_assemble_line(conf, buffer, BUF_SIZE) > 0) {
+ D(("Read line: %s", buffer));
+ key = buffer;
+
+ /* skip leading white space */
+ key += strspn(key, " \n\t");
+
+ /* skip blanks lines and comments */
+ if (key[0] == '#')
+ continue;
+
+ /* skip over "export " if present so we can be compat with
+ bash type declarations */
+ if (strncmp(key, "export ", (size_t) 7) == 0)
+ key += 7;
+
+ /* now find the end of value */
+ mark = key;
+ while(mark[0] != '\n' && mark[0] != '#' && mark[0] != '\0')
+ mark++;
+ if (mark[0] != '\0')
+ mark[0] = '\0';
+
+ /*
+ * sanity check, the key must be alpha-numeric
+ */
+
+ for ( i = 0 ; key[i] != '=' && key[i] != '\0' ; i++ )
+ if (!isalnum(key[i]) && key[i] != '_') {
+ pam_syslog(pamh, LOG_ERR,
+ "non-alphanumeric key '%s' in %s', ignoring",
+ key, file);
+ break;
+ }
+ /* non-alphanumeric key, ignore this line */
+ if (key[i] != '=' && key[i] != '\0')
+ continue;
+
+ /* now we try to be smart about quotes around the value,
+ but not too smart, we can't get all fancy with escaped
+ values like bash */
+ if (key[i] == '=' && (key[++i] == '\"' || key[i] == '\'')) {
+ for ( t = i+1 ; key[t] != '\0' ; t++)
+ if (key[t] != '\"' && key[t] != '\'')
+ key[i++] = key[t];
+ else if (key[t+1] != '\0')
+ key[i++] = key[t];
+ key[i] = '\0';
+ }
+
+ /* if this is a request to delete a variable, check that it's
+ actually set first, so we don't get a vague error back from
+ pam_putenv() */
+ for (i = 0; key[i] != '=' && key[i] != '\0'; i++);
+
+ if (key[i] == '\0' && !pam_getenv(pamh,key))
+ continue;
+
+ /* set the env var, if it fails, we break out of the loop */
+ retval = pam_putenv(pamh, key);
+ if (retval != PAM_SUCCESS) {
+ D(("error setting env \"%s\"", key));
+ break;
+ } else if (ctrl & PAM_DEBUG_ARG) {
+ pam_syslog(pamh, LOG_DEBUG,
+ "pam_putenv(\"%s\")", key);
+ }
+ }
+
+ (void) fclose(conf);
+
+ /* tidy up */
+ D(("Exit."));
+ return retval;
+}
+
+/*
+ * This is where we read a line of the PAM config file. The line may be
+ * preceeded by lines of comments and also extended with "\\\n"
+ */
+
+static int _assemble_line(FILE *f, char *buffer, int buf_len)
+{
+ char *p = buffer;
+ char *s, *os;
+ int used = 0;
+ int whitespace;
+
+ /* loop broken with a 'break' when a non-'\\n' ended line is read */
+
+ D(("called."));
+ for (;;) {
+ if (used >= buf_len) {
+ /* Overflow */
+ D(("_assemble_line: overflow"));
+ return -1;
+ }
+ if (fgets(p, buf_len - used, f) == NULL) {
+ if (used) {
+ /* Incomplete read */
+ return -1;
+ } else {
+ /* EOF */
+ return 0;
+ }
+ }
+
+ /* skip leading spaces --- line may be blank */
+
+ whitespace = strspn(p, " \n\t");
+ s = p + whitespace;
+ if (*s && (*s != '#')) {
+ used += whitespace;
+ os = s;
+
+ /*
+ * we are only interested in characters before the first '#'
+ * character
+ */
+
+ while (*s && *s != '#')
+ ++s;
+ if (*s == '#') {
+ *s = '\0';
+ used += strlen(os);
+ break; /* the line has been read */
+ }
+
+ s = os;
+
+ /*
+ * Check for backslash by scanning back from the end of
+ * the entered line, the '\n' has been included since
+ * normally a line is terminated with this
+ * character. fgets() should only return one though!
+ */
+
+ s += strlen(s);
+ while (s > os && ((*--s == ' ') || (*s == '\t')
+ || (*s == '\n')));
+
+ /* check if it ends with a backslash */
+ if (*s == '\\') {
+ *s = '\0'; /* truncate the line here */
+ used += strlen(os);
+ p = s; /* there is more ... */
+ } else {
+ /* End of the line! */
+ used += strlen(os);
+ break; /* this is the complete line */
+ }
+
+ } else {
+ /* Nothing in this line */
+ /* Don't move p */
+ }
+ }
+
+ return used;
+}
+
+static int
+_parse_line (const pam_handle_t *pamh, char *buffer, VAR *var)
+{
+ /*
+ * parse buffer into var, legal syntax is
+ * VARIABLE [DEFAULT=[[string]] [OVERRIDE=[value]]
+ *
+ * Any other options defined make this a bad line,
+ * error logged and no var set
+ */
+
+ int length, quoteflg=0;
+ char *ptr, **valptr, *tmpptr;
+
+ D(("Called buffer = <%s>", buffer));
+
+ length = strcspn(buffer," \t\n");
+
+ if ((var->name = malloc(length + 1)) == NULL) {
+ pam_syslog(pamh, LOG_CRIT, "Couldn't malloc %d bytes", length+1);
+ return PAM_BUF_ERR;
+ }
+
+ /*
+ * The first thing on the line HAS to be the variable name,
+ * it may be the only thing though.
+ */
+ strncpy(var->name, buffer, length);
+ var->name[length] = '\0';
+ D(("var->name = <%s>, length = %d", var->name, length));
+
+ /*
+ * Now we check for arguments, we only support two kinds and ('cause I am lazy)
+ * each one can actually be listed any number of times
+ */
+
+ ptr = buffer+length;
+ while ((length = strspn(ptr, " \t")) > 0) {
+ ptr += length; /* remove leading whitespace */
+ D((ptr));
+ if (strncmp(ptr,"DEFAULT=",8) == 0) {
+ ptr+=8;
+ D(("Default arg found: <%s>", ptr));
+ valptr=&(var->defval);
+ } else if (strncmp(ptr, "OVERRIDE=", 9) == 0) {
+ ptr+=9;
+ D(("Override arg found: <%s>", ptr));
+ valptr=&(var->override);
+ } else {
+ D(("Unrecognized options: <%s> - ignoring line", ptr));
+ pam_syslog(pamh, LOG_ERR, "Unrecognized Option: %s - ignoring line", ptr);
+ return BAD_LINE;
+ }
+
+ if ('"' != *ptr) { /* Escaped quotes not supported */
+ length = strcspn(ptr, " \t\n");
+ tmpptr = ptr+length;
+ } else {
+ tmpptr = strchr(++ptr, '"');
+ if (!tmpptr) {
+ D(("Unterminated quoted string: %s", ptr-1));
+ pam_syslog(pamh, LOG_ERR, "Unterminated quoted string: %s", ptr-1);
+ return BAD_LINE;
+ }
+ length = tmpptr - ptr;
+ if (*++tmpptr && ' ' != *tmpptr && '\t' != *tmpptr && '\n' != *tmpptr) {
+ D(("Quotes must cover the entire string: <%s>", ptr));
+ pam_syslog(pamh, LOG_ERR, "Quotes must cover the entire string: <%s>", ptr);
+ return BAD_LINE;
+ }
+ quoteflg++;
+ }
+ if (length) {
+ if ((*valptr = malloc(length + 1)) == NULL) {
+ D(("Couldn't malloc %d bytes", length+1));
+ pam_syslog(pamh, LOG_CRIT, "Couldn't malloc %d bytes", length+1);
+ return PAM_BUF_ERR;
+ }
+ (void)strncpy(*valptr,ptr,length);
+ (*valptr)[length]='\0';
+ } else if (quoteflg--) {
+ *valptr = &quote; /* a quick hack to handle the empty string */
+ }
+ ptr = tmpptr; /* Start the search where we stopped */
+ } /* while */
+
+ /*
+ * The line is parsed, all is well.
+ */
+
+ D(("Exit."));
+ ptr = NULL; tmpptr = NULL; valptr = NULL;
+ return GOOD_LINE;
+}
+
+static int _check_var(pam_handle_t *pamh, VAR *var)
+{
+ /*
+ * Examine the variable and determine what action to take.
+ * Returns DEFINE_VAR, UNDEFINE_VAR depending on action to take
+ * or a PAM_* error code if passed back from other routines
+ *
+ * if no DEFAULT provided, the empty string is assumed
+ * if no OVERRIDE provided, the empty string is assumed
+ * if DEFAULT= and OVERRIDE evaluates to the empty string,
+ * this variable should be undefined
+ * if DEFAULT="" and OVERRIDE evaluates to the empty string,
+ * this variable should be defined with no value
+ * if OVERRIDE=value and value turns into the empty string, DEFAULT is used
+ *
+ * If DEFINE_VAR is to be returned, the correct value to define will
+ * be pointed to by var->value
+ */
+
+ int retval;
+
+ D(("Called."));
+
+ /*
+ * First thing to do is to expand any arguments, but only
+ * if they are not the special quote values (cause expand_arg
+ * changes memory).
+ */
+
+ if (var->defval && (&quote != var->defval) &&
+ ((retval = _expand_arg(pamh, &(var->defval))) != PAM_SUCCESS)) {
+ return retval;
+ }
+ if (var->override && (&quote != var->override) &&
+ ((retval = _expand_arg(pamh, &(var->override))) != PAM_SUCCESS)) {
+ return retval;
+ }
+
+ /* Now its easy */
+
+ if (var->override && *(var->override) && &quote != var->override) {
+ /* if there is a non-empty string in var->override, we use it */
+ D(("OVERRIDE variable <%s> being used: <%s>", var->name, var->override));
+ var->value = var->override;
+ retval = DEFINE_VAR;
+ } else {
+
+ var->value = var->defval;
+ if (&quote == var->defval) {
+ /*
+ * This means that the empty string was given for defval value
+ * which indicates that a variable should be defined with no value
+ */
+ *var->defval = '\0';
+ D(("An empty variable: <%s>", var->name));
+ retval = DEFINE_VAR;
+ } else if (var->defval) {
+ D(("DEFAULT variable <%s> being used: <%s>", var->name, var->defval));
+ retval = DEFINE_VAR;
+ } else {
+ D(("UNDEFINE variable <%s>", var->name));
+ retval = UNDEFINE_VAR;
+ }
+ }
+
+ D(("Exit."));
+ return retval;
+}
+
+static int _expand_arg(pam_handle_t *pamh, char **value)
+{
+ const char *orig=*value, *tmpptr=NULL;
+ char *ptr; /*
+ * Sure would be nice to use tmpptr but it needs to be
+ * a constant so that the compiler will shut up when I
+ * call pam_getenv and _pam_get_item_byname -- sigh
+ */
+
+ /* No unexpanded variable can be bigger than BUF_SIZE */
+ char type, tmpval[BUF_SIZE];
+
+ /* I know this shouldn't be hard-coded but it's so much easier this way */
+ char tmp[MAX_ENV];
+
+ D(("Remember to initialize tmp!"));
+ memset(tmp, 0, MAX_ENV);
+
+ /*
+ * (possibly non-existent) environment variables can be used as values
+ * by prepending a "$" and wrapping in {} (ie: ${HOST}), can escape with "\"
+ * (possibly non-existent) PAM items can be used as values
+ * by prepending a "@" and wrapping in {} (ie: @{PAM_RHOST}, can escape
+ *
+ */
+ D(("Expanding <%s>",orig));
+ while (*orig) { /* while there is some input to deal with */
+ if ('\\' == *orig) {
+ ++orig;
+ if ('$' != *orig && '@' != *orig) {
+ D(("Unrecognized escaped character: <%c> - ignoring", *orig));
+ pam_syslog(pamh, LOG_ERR,
+ "Unrecognized escaped character: <%c> - ignoring",
+ *orig);
+ } else if ((strlen(tmp) + 1) < MAX_ENV) {
+ tmp[strlen(tmp)] = *orig++; /* Note the increment */
+ } else {
+ /* is it really a good idea to try to log this? */
+ D(("Variable buffer overflow: <%s> + <%s>", tmp, tmpptr));
+ pam_syslog (pamh, LOG_ERR, "Variable buffer overflow: <%s> + <%s>",
+ tmp, tmpptr);
+ return PAM_BUF_ERR;
+ }
+ continue;
+ }
+ if ('$' == *orig || '@' == *orig) {
+ if ('{' != *(orig+1)) {
+ D(("Expandable variables must be wrapped in {}"
+ " <%s> - ignoring", orig));
+ pam_syslog(pamh, LOG_ERR, "Expandable variables must be wrapped in {}"
+ " <%s> - ignoring", orig);
+ if ((strlen(tmp) + 1) < MAX_ENV) {
+ tmp[strlen(tmp)] = *orig++; /* Note the increment */
+ }
+ continue;
+ } else {
+ D(("Expandable argument: <%s>", orig));
+ type = *orig;
+ orig+=2; /* skip the ${ or @{ characters */
+ ptr = strchr(orig, '}');
+ if (ptr) {
+ *ptr++ = '\0';
+ } else {
+ D(("Unterminated expandable variable: <%s>", orig-2));
+ pam_syslog(pamh, LOG_ERR,
+ "Unterminated expandable variable: <%s>", orig-2);
+ return PAM_ABORT;
+ }
+ strncpy(tmpval, orig, sizeof(tmpval));
+ tmpval[sizeof(tmpval)-1] = '\0';
+ orig=ptr;
+ /*
+ * so, we know we need to expand tmpval, it is either
+ * an environment variable or a PAM_ITEM. type will tell us which
+ */
+ switch (type) {
+
+ case '$':
+ D(("Expanding env var: <%s>",tmpval));
+ tmpptr = pam_getenv(pamh, tmpval);
+ D(("Expanded to <%s>", tmpptr));
+ break;
+
+ case '@':
+ D(("Expanding pam item: <%s>",tmpval));
+ tmpptr = _pam_get_item_byname(pamh, tmpval);
+ D(("Expanded to <%s>", tmpptr));
+ break;
+
+ default:
+ D(("Impossible error, type == <%c>", type));
+ pam_syslog(pamh, LOG_CRIT, "Impossible error, type == <%c>", type);
+ return PAM_ABORT;
+ } /* switch */
+
+ if (tmpptr) {
+ if ((strlen(tmp) + strlen(tmpptr)) < MAX_ENV) {
+ strcat(tmp, tmpptr);
+ } else {
+ /* is it really a good idea to try to log this? */
+ D(("Variable buffer overflow: <%s> + <%s>", tmp, tmpptr));
+ pam_syslog (pamh, LOG_ERR,
+ "Variable buffer overflow: <%s> + <%s>", tmp, tmpptr);
+ return PAM_BUF_ERR;
+ }
+ }
+ } /* if ('{' != *orig++) */
+ } else { /* if ( '$' == *orig || '@' == *orig) */
+ if ((strlen(tmp) + 1) < MAX_ENV) {
+ tmp[strlen(tmp)] = *orig++; /* Note the increment */
+ } else {
+ /* is it really a good idea to try to log this? */
+ D(("Variable buffer overflow: <%s> + <%s>", tmp, tmpptr));
+ pam_syslog(pamh, LOG_ERR,
+ "Variable buffer overflow: <%s> + <%s>", tmp, tmpptr);
+ return PAM_BUF_ERR;
+ }
+ }
+ } /* for (;*orig;) */
+
+ if (strlen(tmp) > strlen(*value)) {
+ free(*value);
+ if ((*value = malloc(strlen(tmp) +1)) == NULL) {
+ D(("Couldn't malloc %d bytes for expanded var", strlen(tmp)+1));
+ pam_syslog (pamh, LOG_CRIT, "Couldn't malloc %lu bytes for expanded var",
+ (unsigned long)strlen(tmp)+1);
+ return PAM_BUF_ERR;
+ }
+ }
+ strcpy(*value, tmp);
+ memset(tmp,'\0',sizeof(tmp));
+ D(("Exit."));
+
+ return PAM_SUCCESS;
+}
+
+static const char * _pam_get_item_byname(pam_handle_t *pamh, const char *name)
+{
+ /*
+ * This function just allows me to use names as given in the config
+ * file and translate them into the appropriate PAM_ITEM macro
+ */
+
+ int item;
+ const void *itemval;
+
+ D(("Called."));
+ if (strcmp(name, "PAM_USER") == 0 || strcmp(name, "HOME") == 0 || strcmp(name, "SHELL") == 0) {
+ item = PAM_USER;
+ } else if (strcmp(name, "PAM_USER_PROMPT") == 0) {
+ item = PAM_USER_PROMPT;
+ } else if (strcmp(name, "PAM_TTY") == 0) {
+ item = PAM_TTY;
+ } else if (strcmp(name, "PAM_RUSER") == 0) {
+ item = PAM_RUSER;
+ } else if (strcmp(name, "PAM_RHOST") == 0) {
+ item = PAM_RHOST;
+ } else {
+ D(("Unknown PAM_ITEM: <%s>", name));
+ pam_syslog (pamh, LOG_ERR, "Unknown PAM_ITEM: <%s>", name);
+ return NULL;
+ }
+
+ if (pam_get_item(pamh, item, &itemval) != PAM_SUCCESS) {
+ D(("pam_get_item failed"));
+ return NULL; /* let pam_get_item() log the error */
+ }
+
+ if (itemval && (strcmp(name, "HOME") == 0 || strcmp(name, "SHELL") == 0)) {
+ struct passwd *user_entry;
+ user_entry = pam_modutil_getpwnam (pamh, (char *) itemval);
+ if (!user_entry) {
+ pam_syslog(pamh, LOG_ERR, "No such user!?");
+ return NULL;
+ }
+ return (strcmp(name, "SHELL") == 0) ?
+ user_entry->pw_shell :
+ user_entry->pw_dir;
+ }
+
+ D(("Exit."));
+ return itemval;
+}
+
+static int _define_var(pam_handle_t *pamh, int ctrl, VAR *var)
+{
+ /* We have a variable to define, this is a simple function */
+
+ char *envvar;
+ int retval = PAM_SUCCESS;
+
+ D(("Called."));
+ if (asprintf(&envvar, "%s=%s", var->name, var->value) < 0) {
+ pam_syslog(pamh, LOG_CRIT, "out of memory");
+ return PAM_BUF_ERR;
+ }
+
+ retval = pam_putenv(pamh, envvar);
+ if (ctrl & PAM_DEBUG_ARG) {
+ pam_syslog(pamh, LOG_DEBUG, "pam_putenv(\"%s\")", envvar);
+ }
+ _pam_drop(envvar);
+ D(("Exit."));
+ return retval;
+}
+
+static int _undefine_var(pam_handle_t *pamh, int ctrl, VAR *var)
+{
+ /* We have a variable to undefine, this is a simple function */
+
+ D(("Called and exit."));
+ if (ctrl & PAM_DEBUG_ARG) {
+ pam_syslog(pamh, LOG_DEBUG, "remove variable \"%s\"", var->name);
+ }
+ return pam_putenv(pamh, var->name);
+}
+
+static void _clean_var(VAR *var)
+{
+ if (var->name) {
+ free(var->name);
+ }
+ if (var->defval && (&quote != var->defval)) {
+ free(var->defval);
+ }
+ if (var->override && (&quote != var->override)) {
+ free(var->override);
+ }
+ var->name = NULL;
+ var->value = NULL; /* never has memory specific to it */
+ var->defval = NULL;
+ var->override = NULL;
+ return;
+}
+
+
+
+/* --- authentication management functions (only) --- */
+
+int
+pam_sm_authenticate (pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ return PAM_IGNORE;
+}
+
+static int
+handle_env (pam_handle_t *pamh, int argc, const char **argv)
+{
+ int retval, ctrl, readenv=DEFAULT_READ_ENVFILE;
+ int user_readenv = DEFAULT_USER_READ_ENVFILE;
+ const char *conf_file = NULL, *env_file = NULL, *user_env_file = NULL;
+
+ /*
+ * this module sets environment variables read in from a file
+ */
+
+ D(("Called."));
+ ctrl = _pam_parse(pamh, argc, argv, &conf_file, &env_file,
+ &readenv, &user_env_file, &user_readenv);
+
+ retval = _parse_config_file(pamh, ctrl, conf_file);
+
+ if(readenv && retval == PAM_SUCCESS) {
+ retval = _parse_env_file(pamh, ctrl, env_file);
+ if (retval == PAM_IGNORE)
+ retval = PAM_SUCCESS;
+ }
+
+ if(user_readenv && retval == PAM_SUCCESS) {
+ char *envpath = NULL;
+ struct passwd *user_entry = NULL;
+ const char *username;
+ struct stat statbuf;
+
+ username = _pam_get_item_byname(pamh, "PAM_USER");
+
+ if (username)
+ user_entry = pam_modutil_getpwnam (pamh, username);
+ if (!user_entry) {
+ pam_syslog(pamh, LOG_ERR, "No such user!?");
+ }
+ else {
+ if (asprintf(&envpath, "%s/%s", user_entry->pw_dir, user_env_file) < 0)
+ {
+ pam_syslog(pamh, LOG_CRIT, "Out of memory");
+ return PAM_BUF_ERR;
+ }
+ if (stat(envpath, &statbuf) == 0) {
+ PAM_MODUTIL_DEF_PRIVS(privs);
+
+ if (pam_modutil_drop_priv(pamh, &privs, user_entry)) {
+ retval = PAM_SESSION_ERR;
+ } else {
+ retval = _parse_config_file(pamh, ctrl, envpath);
+ if (pam_modutil_regain_priv(pamh, &privs))
+ retval = PAM_SESSION_ERR;
+ }
+ if (retval == PAM_IGNORE)
+ retval = PAM_SUCCESS;
+ }
+ free(envpath);
+ }
+ }
+
+ /* indicate success or failure */
+ D(("Exit."));
+ return retval;
+}
+
+int
+pam_sm_acct_mgmt (pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ pam_syslog (pamh, LOG_NOTICE, "pam_sm_acct_mgmt called inappropriately");
+ return PAM_SERVICE_ERR;
+}
+
+int
+pam_sm_setcred (pam_handle_t *pamh, int flags UNUSED,
+ int argc, const char **argv)
+{
+ D(("Called"));
+ return handle_env (pamh, argc, argv);
+}
+
+int
+pam_sm_open_session (pam_handle_t *pamh, int flags UNUSED,
+ int argc, const char **argv)
+{
+ D(("Called"));
+ return handle_env (pamh, argc, argv);
+}
+
+int
+pam_sm_close_session (pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ D(("Called and Exit"));
+ return PAM_SUCCESS;
+}
+
+int
+pam_sm_chauthtok (pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ pam_syslog (pamh, LOG_NOTICE, "pam_sm_chauthtok called inappropriately");
+ return PAM_SERVICE_ERR;
+}
+
+/* end of module definition */
diff --git a/modules/pam_env/pam_env.conf b/modules/pam_env/pam_env.conf
new file mode 100644
index 0000000..30e9d00
--- /dev/null
+++ b/modules/pam_env/pam_env.conf
@@ -0,0 +1,73 @@
+#
+# This is the configuration file for pam_env, a PAM module to load in
+# a configurable list of environment variables for a
+#
+# The original idea for this came from Andrew G. Morgan ...
+#<quote>
+# Mmm. Perhaps you might like to write a pam_env module that reads a
+# default environment from a file? I can see that as REALLY
+# useful... Note it would be an "auth" module that returns PAM_IGNORE
+# for the auth part and sets the environment returning PAM_SUCCESS in
+# the setcred function...
+#</quote>
+#
+# What I wanted was the REMOTEHOST variable set, purely for selfish
+# reasons, and AGM didn't want it added to the SimpleApps login
+# program (which is where I added the patch). So, my first concern is
+# that variable, from there there are numerous others that might/would
+# be useful to be set: NNTPSERVER, LESS, PATH, PAGER, MANPAGER .....
+#
+# Of course, these are a different kind of variable than REMOTEHOST in
+# that they are things that are likely to be configured by
+# administrators rather than set by logging in, how to treat them both
+# in the same config file?
+#
+# Here is my idea:
+#
+# Each line starts with the variable name, there are then two possible
+# options for each variable DEFAULT and OVERRIDE.
+# DEFAULT allows and administrator to set the value of the
+# variable to some default value, if none is supplied then the empty
+# string is assumed. The OVERRIDE option tells pam_env that it should
+# enter in its value (overriding the default value) if there is one
+# to use. OVERRIDE is not used, "" is assumed and no override will be
+# done.
+#
+# VARIABLE [DEFAULT=[value]] [OVERRIDE=[value]]
+#
+# (Possibly non-existent) environment variables may be used in values
+# using the ${string} syntax and (possibly non-existent) PAM_ITEMs may
+# be used in values using the @{string} syntax. Both the $ and @
+# characters can be backslash escaped to be used as literal values
+# values can be delimited with "", escaped " not supported.
+# Note that many environment variables that you would like to use
+# may not be set by the time the module is called.
+# For example, HOME is used below several times, but
+# many PAM applications don't make it available by the time you need it.
+#
+#
+# First, some special variables
+#
+# Set the REMOTEHOST variable for any hosts that are remote, default
+# to "localhost" rather than not being set at all
+#REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
+#
+# Set the DISPLAY variable if it seems reasonable
+#DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY}
+#
+#
+# Now some simple variables
+#
+#PAGER DEFAULT=less
+#MANPAGER DEFAULT=less
+#LESS DEFAULT="M q e h15 z23 b80"
+#NNTPSERVER DEFAULT=localhost
+#PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin\
+#:/usr/bin:/usr/local/bin/X11:/usr/bin/X11
+#
+# silly examples of escaped variables, just to show how they work.
+#
+#DOLLAR DEFAULT=\$
+#DOLLARDOLLAR DEFAULT= OVERRIDE=\$${DOLLAR}
+#DOLLARPLUS DEFAULT=\${REMOTEHOST}${REMOTEHOST}
+#ATSIGN DEFAULT="" OVERRIDE=\@
diff --git a/modules/pam_env/pam_env.conf.5 b/modules/pam_env/pam_env.conf.5
new file mode 100644
index 0000000..ffa35a1
--- /dev/null
+++ b/modules/pam_env/pam_env.conf.5
@@ -0,0 +1,132 @@
+'\" t
+.\" Title: pam_env.conf
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\" Date: 05/18/2017
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_ENV\&.CONF" "5" "05/18/2017" "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_env.conf, environment \- the environment variables config files
+.SH "DESCRIPTION"
+.PP
+The
+/etc/security/pam_env\&.conf
+file specifies the environment variables to be set, unset or modified by
+\fBpam_env\fR(8)\&. When someone logs in, this file is read and the environment variables are set according\&.
+.PP
+Each line starts with the variable name, there are then two possible options for each variable DEFAULT and OVERRIDE\&. DEFAULT allows and administrator to set the value of the variable to some default value, if none is supplied then the empty string is assumed\&. The OVERRIDE option tells pam_env that it should enter in its value (overriding the default value) if there is one to use\&. OVERRIDE is not used, "" is assumed and no override will be done\&.
+.PP
+\fIVARIABLE\fR
+[\fIDEFAULT=[value]\fR] [\fIOVERRIDE=[value]\fR]
+.PP
+(Possibly non\-existent) environment variables may be used in values using the ${string} syntax and (possibly non\-existent) PAM_ITEMs as well as HOME and SHELL may be used in values using the @{string} syntax\&. Both the $ and @ characters can be backslash escaped to be used as literal values values can be delimited with "", escaped " not supported\&. Note that many environment variables that you would like to use may not be set by the time the module is called\&. For example, ${HOME} is used below several times, but many PAM applications don\*(Aqt make it available by the time you need it\&. The special variables @{HOME} and @{SHELL} are expanded to the values for the user from his
+\fIpasswd\fR
+entry\&.
+.PP
+The "\fI#\fR" character at start of line (no space at front) can be used to mark this line as a comment line\&.
+.PP
+The
+/etc/environment
+file specifies the environment variables to be set\&. The file must consist of simple
+\fINAME=VALUE\fR
+pairs on separate lines\&. The
+\fBpam_env\fR(8)
+module will read the file after the
+pam_env\&.conf
+file\&.
+.SH "EXAMPLES"
+.PP
+These are some example lines which might be specified in
+/etc/security/pam_env\&.conf\&.
+.PP
+Set the REMOTEHOST variable for any hosts that are remote, default to "localhost" rather than not being set at all
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
+
+.fi
+.if n \{\
+.RE
+.\}
+.PP
+Set the DISPLAY variable if it seems reasonable
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ DISPLAY DEFAULT=${REMOTEHOST}:0\&.0 OVERRIDE=${DISPLAY}
+
+.fi
+.if n \{\
+.RE
+.\}
+.PP
+Now some simple variables
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ PAGER DEFAULT=less
+ MANPAGER DEFAULT=less
+ LESS DEFAULT="M q e h15 z23 b80"
+ NNTPSERVER DEFAULT=localhost
+ PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin\e
+ :/usr/bin:/usr/local/bin/X11:/usr/bin/X11
+ XDG_DATA_HOME @{HOME}/share/
+
+.fi
+.if n \{\
+.RE
+.\}
+.PP
+Silly examples of escaped variables, just to show how they work\&.
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ DOLLAR DEFAULT=\e$
+ DOLLARDOLLAR DEFAULT= OVERRIDE=\e$${DOLLAR}
+ DOLLARPLUS DEFAULT=\e${REMOTEHOST}${REMOTEHOST}
+ ATSIGN DEFAULT="" OVERRIDE=\e@
+
+.fi
+.if n \{\
+.RE
+.\}
+.SH "SEE ALSO"
+.PP
+\fBpam_env\fR(8),
+\fBpam.d\fR(5),
+\fBpam\fR(8),
+\fBenviron\fR(7)
+.SH "AUTHOR"
+.PP
+pam_env was written by Dave Kinchlea <kinch@kinch\&.ark\&.com>\&.
diff --git a/modules/pam_env/pam_env.conf.5.xml b/modules/pam_env/pam_env.conf.5.xml
new file mode 100644
index 0000000..c47f17d
--- /dev/null
+++ b/modules/pam_env/pam_env.conf.5.xml
@@ -0,0 +1,136 @@
+<?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_env.conf">
+
+ <refmeta>
+ <refentrytitle>pam_env.conf</refentrytitle>
+ <manvolnum>5</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname>pam_env.conf</refname>
+ <refname>environment</refname>
+ <refpurpose>the environment variables config files</refpurpose>
+ </refnamediv>
+
+
+ <refsect1 id='pam_env.conf-description'>
+ <title>DESCRIPTION</title>
+
+ <para>
+ The <filename>/etc/security/pam_env.conf</filename> file specifies
+ the environment variables to be set, unset or modified by
+ <citerefentry><refentrytitle>pam_env</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
+ When someone logs in, this file is read and the environment
+ variables are set according.
+ </para>
+ <para>
+ Each line starts with the variable name, there are then two possible
+ options for each variable DEFAULT and OVERRIDE. DEFAULT allows and
+ administrator to set the value of the variable to some default
+ value, if none is supplied then the empty string is assumed. The
+ OVERRIDE option tells pam_env that it should enter in its value
+ (overriding the default value) if there is one to use. OVERRIDE is
+ not used, "" is assumed and no override will be done.
+ </para>
+ <para>
+ <replaceable>VARIABLE</replaceable>
+ [<replaceable>DEFAULT=[value]</replaceable>]
+ [<replaceable>OVERRIDE=[value]</replaceable>]
+ </para>
+
+ <para>
+ (Possibly non-existent) environment variables may be used in values
+ using the ${string} syntax and (possibly non-existent) PAM_ITEMs as well
+ as HOME and SHELL may be used in values using the @{string} syntax. Both
+ the $ and @ characters can be backslash escaped to be used as literal values
+ values can be delimited with "", escaped " not supported.
+ Note that many environment variables that you would like to use
+ may not be set by the time the module is called.
+ For example, ${HOME} is used below several times, but
+ many PAM applications don't make it available by the time you need it.
+ The special variables @{HOME} and @{SHELL} are expanded to the values
+ for the user from his <emphasis>passwd</emphasis> entry.
+ </para>
+
+ <para>
+ The "<emphasis>#</emphasis>" character at start of line (no space
+ at front) can be used to mark this line as a comment line.
+ </para>
+
+ <para>
+ The <filename>/etc/environment</filename> file specifies
+ the environment variables to be set. The file must consist of simple
+ <emphasis>NAME=VALUE</emphasis> pairs on separate lines.
+ The <citerefentry><refentrytitle>pam_env</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ module will read the file after the <filename>pam_env.conf</filename>
+ file.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_env.conf-examples">
+ <title>EXAMPLES</title>
+ <para>
+ These are some example lines which might be specified in
+ <filename>/etc/security/pam_env.conf</filename>.
+ </para>
+
+ <para>
+ Set the REMOTEHOST variable for any hosts that are remote, default
+ to "localhost" rather than not being set at all
+ </para>
+ <programlisting>
+ REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
+ </programlisting>
+
+ <para>
+ Set the DISPLAY variable if it seems reasonable
+ </para>
+ <programlisting>
+ DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY}
+ </programlisting>
+
+ <para>
+ Now some simple variables
+ </para>
+ <programlisting>
+ PAGER DEFAULT=less
+ MANPAGER DEFAULT=less
+ LESS DEFAULT="M q e h15 z23 b80"
+ NNTPSERVER DEFAULT=localhost
+ PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin\
+ :/usr/bin:/usr/local/bin/X11:/usr/bin/X11
+ XDG_DATA_HOME @{HOME}/share/
+ </programlisting>
+
+ <para>
+ Silly examples of escaped variables, just to show how they work.
+ </para>
+ <programlisting>
+ DOLLAR DEFAULT=\$
+ DOLLARDOLLAR DEFAULT= OVERRIDE=\$${DOLLAR}
+ DOLLARPLUS DEFAULT=\${REMOTEHOST}${REMOTEHOST}
+ ATSIGN DEFAULT="" OVERRIDE=\@
+ </programlisting>
+ </refsect1>
+
+ <refsect1 id="pam_env.conf-see_also">
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry><refentrytitle>pam_env</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_env.conf-author">
+ <title>AUTHOR</title>
+ <para>
+ pam_env was written by Dave Kinchlea &lt;kinch@kinch.ark.com&gt;.
+ </para>
+ </refsect1>
+</refentry>
diff --git a/modules/pam_env/tst-pam_env b/modules/pam_env/tst-pam_env
new file mode 100755
index 0000000..c40e70a
--- /dev/null
+++ b/modules/pam_env/tst-pam_env
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_env.so
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 23:13:16 +0000