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-rw-r--r--modules/pam_access/Makefile.am36
-rw-r--r--modules/pam_access/Makefile.in1222
-rw-r--r--modules/pam_access/README131
-rw-r--r--modules/pam_access/README.xml39
-rw-r--r--modules/pam_access/access.conf122
-rw-r--r--modules/pam_access/access.conf.5222
-rw-r--r--modules/pam_access/access.conf.5.xml253
-rw-r--r--modules/pam_access/pam_access.8139
-rw-r--r--modules/pam_access/pam_access.8.xml265
-rw-r--r--modules/pam_access/pam_access.c985
-rwxr-xr-xmodules/pam_access/tst-pam_access2
11 files changed, 3416 insertions, 0 deletions
diff --git a/modules/pam_access/Makefile.am b/modules/pam_access/Makefile.am
new file mode 100644
index 0000000..5723dd5
--- /dev/null
+++ b/modules/pam_access/Makefile.am
@@ -0,0 +1,36 @@
+#
+# Copyright (c) 2005, 2006, 2009 Thorsten Kukuk <kukuk@thkukuk.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = $(XMLS)
+
+if HAVE_DOC
+dist_man_MANS = access.conf.5 pam_access.8
+endif
+XMLS = README.xml access.conf.5.xml pam_access.8.xml
+dist_check_SCRIPTS = tst-pam_access
+TESTS = $(dist_check_SCRIPTS)
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ -DPAM_ACCESS_CONFIG=\"$(SCONFIGDIR)/access.conf\" \
+ -DACCESS_CONF_GLOB=\"$(SCONFIGDIR)/access.d/*.conf\" $(WARN_CFLAGS)
+AM_LDFLAGS = -no-undefined -avoid-version -module
+if HAVE_VERSIONING
+ AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_access.la
+pam_access_la_LIBADD = $(top_builddir)/libpam/libpam.la
+
+dist_secureconf_DATA = access.conf
+
+if ENABLE_REGENERATE_MAN
+dist_noinst_DATA = README
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_access/Makefile.in b/modules/pam_access/Makefile.in
new file mode 100644
index 0000000..6f9abf4
--- /dev/null
+++ b/modules/pam_access/Makefile.in
@@ -0,0 +1,1222 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 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.
+
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+distdir: $(BUILT_SOURCES)
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+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
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+ fi
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+clean-generic:
+ -test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
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diff --git a/modules/pam_access/README b/modules/pam_access/README
new file mode 100644
index 0000000..26aad33
--- /dev/null
+++ b/modules/pam_access/README
@@ -0,0 +1,131 @@
+pam_access — PAM module for logdaemon style login access control
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+The pam_access PAM module is mainly for access management. It provides
+logdaemon style login access control based on login names, host or domain
+names, internet addresses or network numbers, or on terminal line names, X
+$DISPLAY values, or PAM service names in case of non-networked logins.
+
+By default rules for access management are taken from config file /etc/security
+/access.conf if you don't specify another file. Then individual *.conf files
+from the /etc/security/access.d/ directory are read. The files are parsed one
+after another in the order of the system locale. The effect of the individual
+files is the same as if all the files were concatenated together in the order
+of parsing. This means that once a pattern is matched in some file no further
+files are parsed. If a config file is explicitly specified with the accessfile
+option the files in the above directory are not parsed.
+
+If Linux PAM is compiled with audit support the module will report when it
+denies access based on origin (host, tty, etc.).
+
+OPTIONS
+
+accessfile=/path/to/access.conf
+
+ Indicate an alternative access.conf style configuration file to override
+ the default. This can be useful when different services need different
+ access lists.
+
+debug
+
+ A lot of debug information is printed with syslog(3).
+
+noaudit
+
+ Do not report logins from disallowed hosts and ttys to the audit subsystem.
+
+fieldsep=separators
+
+ This option modifies the field separator character that pam_access will
+ recognize when parsing the access configuration file. For example: fieldsep
+ =| will cause the default `:' character to be treated as part of a field
+ value and `|' becomes the field separator. Doing this may be useful in
+ conjunction with a system that wants to use pam_access with X based
+ applications, since the PAM_TTY item is likely to be of the form
+ "hostname:0" which includes a `:' character in its value. But you should
+ not need this.
+
+listsep=separators
+
+ This option modifies the list separator character that pam_access will
+ recognize when parsing the access configuration file. For example: listsep
+ =, will cause the default ` ' (space) and `\t' (tab) characters to be
+ treated as part of a list element value and `,' becomes the only list
+ element separator. Doing this may be useful on a system with group
+ information obtained from a Windows domain, where the default built-in
+ groups "Domain Users", "Domain Admins" contain a space.
+
+nodefgroup
+
+ User tokens which are not enclosed in parentheses will not be matched
+ against the group database. The backwards compatible default is to try the
+ group database match even for tokens not enclosed in parentheses.
+
+EXAMPLES
+
+These are some example lines which might be specified in /etc/security/
+access.conf.
+
+User root should be allowed to get access via cron, X11 terminal :0, tty1, ...,
+tty5, tty6.
+
++:root:crond :0 tty1 tty2 tty3 tty4 tty5 tty6
+
+User root should be allowed to get access from hosts which own the IPv4
+addresses. This does not mean that the connection have to be a IPv4 one, a IPv6
+connection from a host with one of this IPv4 addresses does work, too.
+
++:root:192.168.200.1 192.168.200.4 192.168.200.9
+
++:root:127.0.0.1
+
+User root should get access from network 192.168.201. where the term will be
+evaluated by string matching. But it might be better to use network/netmask
+instead. The same meaning of 192.168.201. is 192.168.201.0/24 or 192.168.201.0/
+255.255.255.0.
+
++:root:192.168.201.
+
+User root should be able to have access from hosts foo1.bar.org and
+foo2.bar.org (uses string matching also).
+
++:root:foo1.bar.org foo2.bar.org
+
+User root should be able to have access from domain foo.bar.org (uses string
+matching also).
+
++:root:.foo.bar.org
+
+User root should be denied to get access from all other sources.
+
+-:root:ALL
+
+User foo and members of netgroup admins should be allowed to get access from
+all sources. This will only work if netgroup service is available.
+
++:@admins foo:ALL
+
+User john and foo should get access from IPv6 host address.
+
++:john foo:2001:db8:0:101::1
+
+User john should get access from IPv6 net/mask.
+
++:john:2001:db8:0:101::/64
+
+Members of group wheel should be allowed to get access from all sources.
+
++:(wheel):ALL
+
+Disallow console logins to all but the shutdown, sync and all other accounts,
+which are a member of the wheel group.
+
+-:ALL EXCEPT (wheel) shutdown sync:LOCAL
+
+All other users should be denied to get access from all sources.
+
+-:ALL:ALL
+
diff --git a/modules/pam_access/README.xml b/modules/pam_access/README.xml
new file mode 100644
index 0000000..8c7d078
--- /dev/null
+++ b/modules/pam_access/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_access.8.xml">
+-->
+<!--
+<!ENTITY accessconf SYSTEM "access.conf.5.xml">
+-->
+]>
+
+<article>
+
+ <articleinfo>
+
+ <title>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_access.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_access-name"]/*)'/>
+ </title>
+
+ </articleinfo>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_access.8.xml" xpointer='xpointer(//refsect1[@id = "pam_access-description"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_access.8.xml" xpointer='xpointer(//refsect1[@id = "pam_access-options"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="access.conf.5.xml" xpointer='xpointer(//refsect1[@id = "access.conf-examples"]/*)'/>
+ </section>
+
+</article>
diff --git a/modules/pam_access/access.conf b/modules/pam_access/access.conf
new file mode 100644
index 0000000..47b6b84
--- /dev/null
+++ b/modules/pam_access/access.conf
@@ -0,0 +1,122 @@
+# Login access control table.
+#
+# Comment line must start with "#", no space at front.
+# Order of lines is important.
+#
+# When someone logs in, the table is scanned for the first entry that
+# matches the (user, host) combination, or, in case of non-networked
+# logins, the first entry that matches the (user, tty) combination. The
+# permissions field of that table entry determines whether the login will
+# be accepted or refused.
+#
+# Format of the login access control table is three fields separated by a
+# ":" character:
+#
+# [Note, if you supply a 'fieldsep=|' argument to the pam_access.so
+# module, you can change the field separation character to be
+# '|'. This is useful for configurations where you are trying to use
+# pam_access with X applications that provide PAM_TTY values that are
+# the display variable like "host:0".]
+#
+# permission:users:origins
+#
+# The first field should be a "+" (access granted) or "-" (access denied)
+# character.
+#
+# The second field should be a list of one or more login names, group
+# names, or ALL (always matches). A pattern of the form user@host is
+# matched when the login name matches the "user" part, and when the
+# "host" part matches the local machine name.
+#
+# The third field should be a list of one or more tty names (for
+# non-networked logins), host names, domain names (begin with "."), host
+# addresses, internet network numbers (end with "."), ALL (always
+# matches), NONE (matches no tty on non-networked logins) or
+# LOCAL (matches any string that does not contain a "." character).
+#
+# You can use @netgroupname in host or user patterns; this even works
+# for @usergroup@@hostgroup patterns.
+#
+# The EXCEPT operator makes it possible to write very compact rules.
+#
+# The group file is searched only when a name does not match that of the
+# logged-in user. Both the user's primary group is matched, as well as
+# groups in which users are explicitly listed.
+# To avoid problems with accounts, which have the same name as a group,
+# you can use brackets around group names '(group)' to differentiate.
+# In this case, you should also set the "nodefgroup" option.
+#
+# TTY NAMES: Must be in the form returned by ttyname(3) less the initial
+# "/dev" (e.g. tty1 or vc/1)
+#
+##############################################################################
+#
+# Disallow non-root logins on tty1
+#
+#-:ALL EXCEPT root:tty1
+#
+# Disallow console logins to all but a few accounts.
+#
+#-:ALL EXCEPT wheel shutdown sync:LOCAL
+#
+# Same, but make sure that really the group wheel and not the user
+# wheel is used (use nodefgroup argument, too):
+#
+#-:ALL EXCEPT (wheel) shutdown sync:LOCAL
+#
+# Disallow non-local logins to privileged accounts (group wheel).
+#
+#-:wheel:ALL EXCEPT LOCAL .win.tue.nl
+#
+# Some accounts are not allowed to login from anywhere:
+#
+#-:wsbscaro wsbsecr wsbspac wsbsym wscosor wstaiwde:ALL
+#
+# All other accounts are allowed to login from anywhere.
+#
+##############################################################################
+# All lines from here up to the end are building a more complex example.
+##############################################################################
+#
+# User "root" should be allowed to get access via cron .. tty5 tty6.
+#+:root:cron crond :0 tty1 tty2 tty3 tty4 tty5 tty6
+#
+# User "root" should be allowed to get access from hosts with ip addresses.
+#+:root:192.168.200.1 192.168.200.4 192.168.200.9
+#+:root:127.0.0.1
+#
+# User "root" should get access from network 192.168.201.
+# This term will be evaluated by string matching.
+# comment: It might be better to use network/netmask instead.
+# The same is 192.168.201.0/24 or 192.168.201.0/255.255.255.0
+#+:root:192.168.201.
+#
+# User "root" should be able to have access from domain.
+# Uses string matching also.
+#+:root:.foo.bar.org
+#
+# User "root" should be denied to get access from all other sources.
+#-:root:ALL
+#
+# User "foo" and members of netgroup "nis_group" should be
+# allowed to get access from all sources.
+# This will only work if netgroup service is available.
+#+:@nis_group foo:ALL
+#
+# User "john" should get access from ipv4 net/mask
+#+:john:127.0.0.0/24
+#
+# User "john" should get access from ipv4 as ipv6 net/mask
+#+:john:::ffff:127.0.0.0/127
+#
+# User "john" should get access from ipv6 host address
+#+:john:2001:4ca0:0:101::1
+#
+# User "john" should get access from ipv6 host address (same as above)
+#+:john:2001:4ca0:0:101:0:0:0:1
+#
+# User "john" should get access from ipv6 net/mask
+#+:john:2001:4ca0:0:101::/64
+#
+# All other users should be denied to get access from all sources.
+#-:ALL:ALL
diff --git a/modules/pam_access/access.conf.5 b/modules/pam_access/access.conf.5
new file mode 100644
index 0000000..3204aed
--- /dev/null
+++ b/modules/pam_access/access.conf.5
@@ -0,0 +1,222 @@
+'\" t
+.\" Title: access.conf
+.\" Author: [see the "AUTHORS" 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 "ACCESS\&.CONF" "5" "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"
+access.conf \- the login access control table file
+.SH "DESCRIPTION"
+.PP
+The
+/etc/security/access\&.conf
+file specifies (\fIuser/group\fR,
+\fIhost\fR), (\fIuser/group\fR,
+\fInetwork/netmask\fR), (\fIuser/group\fR,
+\fItty\fR), (\fIuser/group\fR,
+\fIX\-$DISPLAY\-value\fR), or (\fIuser/group\fR,
+\fIpam\-service\-name\fR) combinations for which a login will be either accepted or refused\&.
+.PP
+When someone logs in, the file
+access\&.conf
+is scanned for the first entry that matches the (\fIuser/group\fR,
+\fIhost\fR) or (\fIuser/group\fR,
+\fInetwork/netmask\fR) combination, or, in case of non\-networked logins, the first entry that matches the (\fIuser/group\fR,
+\fItty\fR) combination, or in the case of non\-networked logins without a tty, the first entry that matches the (\fIuser/group\fR,
+\fIX\-$DISPLAY\-value\fR) or (\fIuser/group\fR,
+\fIpam\-service\-name/\fR) combination\&. The permissions field of that table entry determines whether the login will be accepted or refused\&.
+.PP
+Each line of the login access control table has three fields separated by a ":" character (colon):
+.PP
+\fIpermission\fR:\fIusers/groups\fR:\fIorigins\fR
+.PP
+The first field, the
+\fIpermission\fR
+field, can be either a "\fI+\fR" character (plus) for access granted or a "\fI\-\fR" character (minus) for access denied\&.
+.PP
+The second field, the
+\fIusers\fR/\fIgroup\fR
+field, should be a list of one or more login names, group names, or
+\fIALL\fR
+(which always matches)\&. To differentiate user entries from group entries, group entries should be written with brackets, e\&.g\&.
+\fI(group)\fR\&.
+.PP
+The third field, the
+\fIorigins\fR
+field, should be a list of one or more tty names (for non\-networked logins), X
+\fI$DISPLAY\fR
+values or PAM service names (for non\-networked logins without a tty), host names, domain names (begin with "\&."), host addresses, internet network numbers (end with "\&."), internet network addresses with network mask (where network mask can be a decimal number or an internet address also),
+\fIALL\fR
+(which always matches) or
+\fILOCAL\fR\&. The
+\fILOCAL\fR
+keyword matches if and only if
+\fBpam_get_item\fR(3), when called with an
+\fIitem_type\fR
+of
+\fIPAM_RHOST\fR, returns
+NULL
+or an empty string (and therefore the
+\fIorigins\fR
+field is compared against the return value of
+\fBpam_get_item\fR(3)
+called with an
+\fIitem_type\fR
+of
+\fIPAM_TTY\fR
+or, absent that,
+\fIPAM_SERVICE\fR)\&.
+.PP
+If supported by the system you can use
+\fI@netgroupname\fR
+in host or user patterns\&. The
+\fI@@netgroupname\fR
+syntax is supported in the user pattern only and it makes the local system hostname to be passed to the netgroup match call in addition to the user name\&. This might not work correctly on some libc implementations causing the match to always fail\&.
+.PP
+The
+\fIEXCEPT\fR
+operator makes it possible to write very compact rules\&.
+.PP
+If the
+\fBnodefgroup\fR
+is not set, the group file is searched when a name does not match that of the logged\-in user\&. Only groups are matched in which users are explicitly listed\&. However the PAM module does not look at the primary group id of a user\&.
+.PP
+The "\fI#\fR" character at start of line (no space at front) can be used to mark this line as a comment line\&.
+.SH "EXAMPLES"
+.PP
+These are some example lines which might be specified in
+/etc/security/access\&.conf\&.
+.PP
+User
+\fIroot\fR
+should be allowed to get access via
+\fIcron\fR, X11 terminal
+\fI:0\fR,
+\fItty1\fR, \&.\&.\&.,
+\fItty5\fR,
+\fItty6\fR\&.
+.PP
++:root:crond :0 tty1 tty2 tty3 tty4 tty5 tty6
+.PP
+User
+\fIroot\fR
+should be allowed to get access from hosts which own the IPv4 addresses\&. This does not mean that the connection have to be a IPv4 one, a IPv6 connection from a host with one of this IPv4 addresses does work, too\&.
+.PP
++:root:192\&.168\&.200\&.1 192\&.168\&.200\&.4 192\&.168\&.200\&.9
+.PP
++:root:127\&.0\&.0\&.1
+.PP
+User
+\fIroot\fR
+should get access from network
+192\&.168\&.201\&.
+where the term will be evaluated by string matching\&. But it might be better to use network/netmask instead\&. The same meaning of
+192\&.168\&.201\&.
+is
+\fI192\&.168\&.201\&.0/24\fR
+or
+\fI192\&.168\&.201\&.0/255\&.255\&.255\&.0\fR\&.
+.PP
++:root:192\&.168\&.201\&.
+.PP
+User
+\fIroot\fR
+should be able to have access from hosts
+\fIfoo1\&.bar\&.org\fR
+and
+\fIfoo2\&.bar\&.org\fR
+(uses string matching also)\&.
+.PP
++:root:foo1\&.bar\&.org foo2\&.bar\&.org
+.PP
+User
+\fIroot\fR
+should be able to have access from domain
+\fIfoo\&.bar\&.org\fR
+(uses string matching also)\&.
+.PP
++:root:\&.foo\&.bar\&.org
+.PP
+User
+\fIroot\fR
+should be denied to get access from all other sources\&.
+.PP
+\-:root:ALL
+.PP
+User
+\fIfoo\fR
+and members of netgroup
+\fIadmins\fR
+should be allowed to get access from all sources\&. This will only work if netgroup service is available\&.
+.PP
++:@admins foo:ALL
+.PP
+User
+\fIjohn\fR
+and
+\fIfoo\fR
+should get access from IPv6 host address\&.
+.PP
++:john foo:2001:db8:0:101::1
+.PP
+User
+\fIjohn\fR
+should get access from IPv6 net/mask\&.
+.PP
++:john:2001:db8:0:101::/64
+.PP
+Members of group
+\fIwheel\fR
+should be allowed to get access from all sources\&.
+.PP
++:(wheel):ALL
+.PP
+Disallow console logins to all but the shutdown, sync and all other accounts, which are a member of the wheel group\&.
+.PP
+\-:ALL EXCEPT (wheel) shutdown sync:LOCAL
+.PP
+All other users should be denied to get access from all sources\&.
+.PP
+\-:ALL:ALL
+.SH "NOTES"
+.PP
+The default separators of list items in a field are space, \*(Aq,\*(Aq, and tabulator characters\&. Thus conveniently if spaces are put at the beginning and the end of the fields they are ignored\&. However if the list separator is changed with the
+\fIlistsep\fR
+option, the spaces will become part of the actual item and the line will be most probably ignored\&. For this reason, it is not recommended to put spaces around the \*(Aq:\*(Aq characters\&.
+.SH "SEE ALSO"
+.PP
+\fBpam_access\fR(8),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+.SH "AUTHORS"
+.PP
+Original
+\fBlogin.access\fR(5)
+manual was provided by Guido van Rooij which was renamed to
+\fBaccess.conf\fR(5)
+to reflect relation to default config file\&.
+.PP
+Network address / netmask description and example text was introduced by Mike Becher <mike\&.becher@lrz\-muenchen\&.de>\&.
diff --git a/modules/pam_access/access.conf.5.xml b/modules/pam_access/access.conf.5.xml
new file mode 100644
index 0000000..8fdbc31
--- /dev/null
+++ b/modules/pam_access/access.conf.5.xml
@@ -0,0 +1,253 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
+ "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
+
+<refentry id="access.conf">
+
+ <refmeta>
+ <refentrytitle>access.conf</refentrytitle>
+ <manvolnum>5</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname>access.conf</refname>
+ <refpurpose>the login access control table file</refpurpose>
+ </refnamediv>
+
+
+ <refsect1 id='access.conf-description'>
+ <title>DESCRIPTION</title>
+ <para>
+ The <filename>/etc/security/access.conf</filename> file specifies
+ (<replaceable>user/group</replaceable>, <replaceable>host</replaceable>),
+ (<replaceable>user/group</replaceable>, <replaceable>network/netmask</replaceable>),
+ (<replaceable>user/group</replaceable>, <replaceable>tty</replaceable>),
+ (<replaceable>user/group</replaceable>,
+ <replaceable>X-$DISPLAY-value</replaceable>), or
+ (<replaceable>user/group</replaceable>,
+ <replaceable>pam-service-name</replaceable>)
+ combinations for which a login will be either accepted or refused.
+ </para>
+ <para>
+ When someone logs in, the file <filename>access.conf</filename> is
+ scanned for the first entry that matches the
+ (<replaceable>user/group</replaceable>, <replaceable>host</replaceable>) or
+ (<replaceable>user/group</replaceable>, <replaceable>network/netmask</replaceable>)
+ combination, or, in case of non-networked logins, the first entry
+ that matches the
+ (<replaceable>user/group</replaceable>, <replaceable>tty</replaceable>)
+ combination, or in the case of non-networked logins without a
+ tty, the first entry that matches the
+ (<replaceable>user/group</replaceable>,
+ <replaceable>X-$DISPLAY-value</replaceable>) or
+ (<replaceable>user/group</replaceable>,
+ <replaceable>pam-service-name/</replaceable>)
+ combination. The permissions field of that table entry
+ determines
+ whether the login will be accepted or refused.
+ </para>
+
+ <para>
+ Each line of the login access control table has three fields separated
+ by a ":" character (colon):
+ </para>
+
+ <para>
+ <replaceable>permission</replaceable>:<replaceable>users/groups</replaceable>:<replaceable>origins</replaceable>
+ </para>
+
+
+ <para>
+ The first field, the <replaceable>permission</replaceable> field, can be either a
+ "<emphasis>+</emphasis>" character (plus) for access granted or a
+ "<emphasis>-</emphasis>" character (minus) for access denied.
+ </para>
+
+ <para>
+ The second field, the
+ <replaceable>users</replaceable>/<replaceable>group</replaceable>
+ field, should be a list of one or more login names, group names, or
+ <emphasis>ALL</emphasis> (which always matches). To differentiate
+ user entries from group entries, group entries should be written
+ with brackets, e.g. <emphasis>(group)</emphasis>.
+ </para>
+
+ <para>
+ The third field, the <replaceable>origins</replaceable>
+ field, should be a list of one or more tty names (for non-networked
+ logins), X <varname>$DISPLAY</varname> values or PAM service
+ names (for non-networked logins without a tty), host names,
+ domain names (begin with "."), host addresses,
+ internet network numbers (end with "."), internet network addresses
+ with network mask (where network mask can be a decimal number or an
+ internet address also), <emphasis>ALL</emphasis> (which always matches)
+ or <emphasis>LOCAL</emphasis>. The <emphasis>LOCAL</emphasis>
+ keyword matches if and only if
+ <citerefentry><refentrytitle>pam_get_item</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ when called with an <parameter>item_type</parameter> of
+ <emphasis>PAM_RHOST</emphasis>, returns <code>NULL</code> or an
+ empty string (and therefore the
+ <replaceable>origins</replaceable> field is compared against the
+ return value of
+ <citerefentry><refentrytitle>pam_get_item</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ called with an <parameter>item_type</parameter> of
+ <emphasis>PAM_TTY</emphasis> or, absent that,
+ <emphasis>PAM_SERVICE</emphasis>).
+ </para>
+
+ <para>
+ If supported by the system you can use
+ <emphasis>@netgroupname</emphasis> in host or user patterns. The
+ <emphasis>@@netgroupname</emphasis> syntax is supported in the user
+ pattern only and it makes the local system hostname to be passed
+ to the netgroup match call in addition to the user name. This might not
+ work correctly on some libc implementations causing the match to
+ always fail.
+ </para>
+
+ <para>
+ The <replaceable>EXCEPT</replaceable> operator makes it possible to
+ write very compact rules.
+ </para>
+
+ <para>
+ If the <option>nodefgroup</option> is not set, the group file
+ is searched when a name does not match that of the logged-in
+ user. Only groups are matched in which users are explicitly listed.
+ However the PAM module does not look at the primary group id of a user.
+ </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>
+
+ </refsect1>
+
+ <refsect1 id="access.conf-examples">
+ <title>EXAMPLES</title>
+ <para>
+ These are some example lines which might be specified in
+ <filename>/etc/security/access.conf</filename>.
+ </para>
+
+ <para>
+ User <emphasis>root</emphasis> should be allowed to get access via
+ <emphasis>cron</emphasis>, X11 terminal <emphasis remap='I'>:0</emphasis>,
+ <emphasis>tty1</emphasis>, ..., <emphasis>tty5</emphasis>,
+ <emphasis>tty6</emphasis>.
+ </para>
+ <para>+:root:crond :0 tty1 tty2 tty3 tty4 tty5 tty6</para>
+
+ <para>
+ User <emphasis>root</emphasis> should be allowed to get access from
+ hosts which own the IPv4 addresses. This does not mean that the
+ connection have to be a IPv4 one, a IPv6 connection from a host with
+ one of this IPv4 addresses does work, too.
+ </para>
+ <para>+:root:192.168.200.1 192.168.200.4 192.168.200.9</para>
+ <para>+:root:127.0.0.1</para>
+
+ <para>
+ User <emphasis>root</emphasis> should get access from network
+ <literal>192.168.201.</literal> where the term will be evaluated by
+ string matching. But it might be better to use network/netmask instead.
+ The same meaning of <literal>192.168.201.</literal> is
+ <emphasis>192.168.201.0/24</emphasis> or
+ <emphasis>192.168.201.0/255.255.255.0</emphasis>.
+ </para>
+ <para>+:root:192.168.201.</para>
+
+ <para>
+ User <emphasis>root</emphasis> should be able to have access from hosts
+ <emphasis>foo1.bar.org</emphasis> and <emphasis>foo2.bar.org</emphasis>
+ (uses string matching also).
+ </para>
+ <para>+:root:foo1.bar.org foo2.bar.org</para>
+
+ <para>
+ User <emphasis>root</emphasis> should be able to have access from
+ domain <emphasis>foo.bar.org</emphasis> (uses string matching also).
+ </para>
+ <para>+:root:.foo.bar.org</para>
+
+ <para>
+ User <emphasis>root</emphasis> should be denied to get access
+ from all other sources.
+ </para>
+ <para>-:root:ALL</para>
+
+ <para>
+ User <emphasis>foo</emphasis> and members of netgroup
+ <emphasis>admins</emphasis> should be allowed to get access
+ from all sources. This will only work if netgroup service is available.
+ </para>
+ <para>+:@admins foo:ALL</para>
+
+ <para>
+ User <emphasis>john</emphasis> and <emphasis>foo</emphasis>
+ should get access from IPv6 host address.
+ </para>
+ <para>+:john foo:2001:db8:0:101::1</para>
+
+ <para>
+ User <emphasis>john</emphasis> should get access from IPv6 net/mask.
+ </para>
+ <para>+:john:2001:db8:0:101::/64</para>
+
+ <para>
+ Members of group <emphasis>wheel</emphasis> should be allowed to get access
+ from all sources.
+ </para>
+ <para>+:(wheel):ALL</para>
+
+ <para>
+ Disallow console logins to all but the shutdown, sync and all
+ other accounts, which are a member of the wheel group.
+ </para>
+ <para>-:ALL EXCEPT (wheel) shutdown sync:LOCAL</para>
+
+ <para>
+ All other users should be denied to get access from all sources.
+ </para>
+ <para>-:ALL:ALL</para>
+
+ </refsect1>
+
+ <refsect1 id="access.conf-notes">
+ <title>NOTES</title>
+ <para>
+ The default separators of list items in a field are space, ',', and tabulator
+ characters. Thus conveniently if spaces are put at the beginning and the end of
+ the fields they are ignored. However if the list separator is changed with the
+ <emphasis>listsep</emphasis> option, the spaces will become part of the actual
+ item and the line will be most probably ignored. For this reason, it is not
+ recommended to put spaces around the ':' characters.
+ </para>
+ </refsect1>
+
+ <refsect1 id="access.conf-see_also">
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry><refentrytitle>pam_access</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id="access.conf-author">
+ <title>AUTHORS</title>
+ <para>
+ Original <citerefentry><refentrytitle>login.access</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ manual was provided by Guido van Rooij which was renamed to
+ <citerefentry><refentrytitle>access.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ to reflect relation to default config file.
+ </para>
+ <para>
+ Network address / netmask description and example text was
+ introduced by Mike Becher &lt;mike.becher@lrz-muenchen.de&gt;.
+ </para>
+ </refsect1>
+</refentry>
diff --git a/modules/pam_access/pam_access.8 b/modules/pam_access/pam_access.8
new file mode 100644
index 0000000..92de516
--- /dev/null
+++ b/modules/pam_access/pam_access.8
@@ -0,0 +1,139 @@
+'\" t
+.\" Title: pam_access
+.\" Author: [see the "AUTHORS" 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_ACCESS" "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_access \- PAM module for logdaemon style login access control
+.SH "SYNOPSIS"
+.HP \w'\fBpam_access\&.so\fR\ 'u
+\fBpam_access\&.so\fR [debug] [nodefgroup] [noaudit] [accessfile=\fIfile\fR] [fieldsep=\fIsep\fR] [listsep=\fIsep\fR]
+.SH "DESCRIPTION"
+.PP
+The pam_access PAM module is mainly for access management\&. It provides logdaemon style login access control based on login names, host or domain names, internet addresses or network numbers, or on terminal line names, X
+\fI$DISPLAY\fR
+values, or PAM service names in case of non\-networked logins\&.
+.PP
+By default rules for access management are taken from config file
+/etc/security/access\&.conf
+if you don\*(Aqt specify another file\&. Then individual
+*\&.conf
+files from the
+/etc/security/access\&.d/
+directory are read\&. The files are parsed one after another in the order of the system locale\&. The effect of the individual files is the same as if all the files were concatenated together in the order of parsing\&. This means that once a pattern is matched in some file no further files are parsed\&. If a config file is explicitly specified with the
+\fBaccessfile\fR
+option the files in the above directory are not parsed\&.
+.PP
+If Linux PAM is compiled with audit support the module will report when it denies access based on origin (host, tty, etc\&.)\&.
+.SH "OPTIONS"
+.PP
+\fBaccessfile=\fR\fB\fI/path/to/access\&.conf\fR\fR
+.RS 4
+Indicate an alternative
+access\&.conf
+style configuration file to override the default\&. This can be useful when different services need different access lists\&.
+.RE
+.PP
+\fBdebug\fR
+.RS 4
+A lot of debug information is printed with
+\fBsyslog\fR(3)\&.
+.RE
+.PP
+\fBnoaudit\fR
+.RS 4
+Do not report logins from disallowed hosts and ttys to the audit subsystem\&.
+.RE
+.PP
+\fBfieldsep=\fR\fB\fIseparators\fR\fR
+.RS 4
+This option modifies the field separator character that pam_access will recognize when parsing the access configuration file\&. For example:
+\fBfieldsep=|\fR
+will cause the default `:\*(Aq character to be treated as part of a field value and `|\*(Aq becomes the field separator\&. Doing this may be useful in conjunction with a system that wants to use pam_access with X based applications, since the
+\fBPAM_TTY\fR
+item is likely to be of the form "hostname:0" which includes a `:\*(Aq character in its value\&. But you should not need this\&.
+.RE
+.PP
+\fBlistsep=\fR\fB\fIseparators\fR\fR
+.RS 4
+This option modifies the list separator character that pam_access will recognize when parsing the access configuration file\&. For example:
+\fBlistsep=,\fR
+will cause the default ` \*(Aq (space) and `\et\*(Aq (tab) characters to be treated as part of a list element value and `,\*(Aq becomes the only list element separator\&. Doing this may be useful on a system with group information obtained from a Windows domain, where the default built\-in groups "Domain Users", "Domain Admins" contain a space\&.
+.RE
+.PP
+\fBnodefgroup\fR
+.RS 4
+User tokens which are not enclosed in parentheses will not be matched against the group database\&. The backwards compatible default is to try the group database match even for tokens not enclosed in parentheses\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+All module types (\fBauth\fR,
+\fBaccount\fR,
+\fBpassword\fR
+and
+\fBsession\fR) are provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_SUCCESS
+.RS 4
+Access was granted\&.
+.RE
+.PP
+PAM_PERM_DENIED
+.RS 4
+Access was not granted\&.
+.RE
+.PP
+PAM_IGNORE
+.RS 4
+\fBpam_setcred\fR
+was called which does nothing\&.
+.RE
+.PP
+PAM_ABORT
+.RS 4
+Not all relevant data or options could be gotten\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+The user is not known to the system\&.
+.RE
+.SH "FILES"
+.PP
+/etc/security/access\&.conf
+.RS 4
+Default configuration file
+.RE
+.SH "SEE ALSO"
+.PP
+\fBaccess.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)\&.
+.SH "AUTHORS"
+.PP
+The logdaemon style login access control scheme was designed and implemented by Wietse Venema\&. The pam_access PAM module was developed by Alexei Nogin <alexei@nogin\&.dnttm\&.ru>\&. The IPv6 support and the network(address) / netmask feature was developed and provided by Mike Becher <mike\&.becher@lrz\-muenchen\&.de>\&.
diff --git a/modules/pam_access/pam_access.8.xml b/modules/pam_access/pam_access.8.xml
new file mode 100644
index 0000000..9a6556c
--- /dev/null
+++ b/modules/pam_access/pam_access.8.xml
@@ -0,0 +1,265 @@
+<?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_access'>
+
+ <refmeta>
+ <refentrytitle>pam_access</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id='pam_access-name'>
+ <refname>pam_access</refname>
+ <refpurpose>
+ PAM module for logdaemon style login access control
+ </refpurpose>
+ </refnamediv>
+
+<!-- body begins here -->
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pam_access-cmdsynopsis">
+ <command>pam_access.so</command>
+ <arg choice="opt">
+ debug
+ </arg>
+ <arg choice="opt">
+ nodefgroup
+ </arg>
+ <arg choice="opt">
+ noaudit
+ </arg>
+ <arg choice="opt">
+ accessfile=<replaceable>file</replaceable>
+ </arg>
+ <arg choice="opt">
+ fieldsep=<replaceable>sep</replaceable>
+ </arg>
+ <arg choice="opt">
+ listsep=<replaceable>sep</replaceable>
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+
+ <refsect1 id="pam_access-description">
+ <title>DESCRIPTION</title>
+ <para>
+ The pam_access PAM module is mainly for access management.
+ It provides logdaemon style login access control based on login
+ names, host or domain names, internet addresses or network numbers,
+ or on terminal line names, X <varname>$DISPLAY</varname> values,
+ or PAM service names in case of non-networked logins.
+ </para>
+ <para>
+ By default rules for access management are taken from config file
+ <filename>/etc/security/access.conf</filename> if you don't specify
+ another file.
+ Then individual <filename>*.conf</filename> files from the
+ <filename>/etc/security/access.d/</filename> directory are read.
+ The files are parsed one after another in the order of the system locale.
+ The effect of the individual files is the same as if all the files were
+ concatenated together in the order of parsing. This means that once
+ a pattern is matched in some file no further files are parsed.
+ If a config file is explicitly specified with the <option>accessfile</option>
+ option the files in the above directory are not parsed.
+ </para>
+ <para>
+ If Linux PAM is compiled with audit support the module will report
+ when it denies access based on origin (host, tty, etc.).
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_access-options">
+ <title>OPTIONS</title>
+ <variablelist>
+
+ <varlistentry>
+ <term>
+ <option>accessfile=<replaceable>/path/to/access.conf</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Indicate an alternative <filename>access.conf</filename>
+ style configuration file to override the default. This can
+ be useful when different services need different access lists.
+ </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>noaudit</option>
+ </term>
+ <listitem>
+ <para>
+ Do not report logins from disallowed hosts and ttys to the audit subsystem.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>fieldsep=<replaceable>separators</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ This option modifies the field separator character that
+ pam_access will recognize when parsing the access
+ configuration file. For example:
+ <emphasis remap='B'>fieldsep=|</emphasis> will cause the
+ default `:' character to be treated as part of a field value
+ and `|' becomes the field separator. Doing this may be
+ useful in conjunction with a system that wants to use
+ pam_access with X based applications, since the
+ <emphasis remap='B'>PAM_TTY</emphasis> item is likely to be
+ of the form "hostname:0" which includes a `:' character in
+ its value. But you should not need this.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>listsep=<replaceable>separators</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ This option modifies the list separator character that
+ pam_access will recognize when parsing the access
+ configuration file. For example:
+ <emphasis remap='B'>listsep=,</emphasis> will cause the
+ default ` ' (space) and `\t' (tab) characters to be treated
+ as part of a list element value and `,' becomes the only
+ list element separator. Doing this may be useful on a system
+ with group information obtained from a Windows domain,
+ where the default built-in groups "Domain Users",
+ "Domain Admins" contain a space.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>nodefgroup</option>
+ </term>
+ <listitem>
+ <para>
+ User tokens which are not enclosed in parentheses will not be
+ matched against the group database. The backwards compatible default is
+ to try the group database match even for tokens not enclosed
+ in parentheses.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_access-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ All module types (<option>auth</option>, <option>account</option>,
+ <option>password</option> and <option>session</option>) are provided.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_access-return_values">
+ <title>RETURN VALUES</title>
+ <variablelist>
+ <varlistentry>
+ <term>PAM_SUCCESS</term>
+ <listitem>
+ <para>
+ Access was granted.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_PERM_DENIED</term>
+ <listitem>
+ <para>
+ Access was not granted.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_IGNORE</term>
+ <listitem>
+ <para>
+ <function>pam_setcred</function> was called which does nothing.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_ABORT</term>
+ <listitem>
+ <para>
+ Not all relevant data or options could be gotten.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_USER_UNKNOWN</term>
+ <listitem>
+ <para>
+ The user is not known to the system.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_access-files">
+ <title>FILES</title>
+ <variablelist>
+ <varlistentry>
+ <term><filename>/etc/security/access.conf</filename></term>
+ <listitem>
+ <para>Default configuration file</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_access-see_also">
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>access.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_access-authors">
+ <title>AUTHORS</title>
+ <para>
+ The logdaemon style login access control scheme was designed and implemented by
+ Wietse Venema.
+ The pam_access PAM module was developed by
+ Alexei Nogin &lt;alexei@nogin.dnttm.ru&gt;.
+ The IPv6 support and the network(address) / netmask feature
+ was developed and provided by Mike Becher &lt;mike.becher@lrz-muenchen.de&gt;.
+ </para>
+ </refsect1>
+</refentry>
diff --git a/modules/pam_access/pam_access.c b/modules/pam_access/pam_access.c
new file mode 100644
index 0000000..277192b
--- /dev/null
+++ b/modules/pam_access/pam_access.c
@@ -0,0 +1,985 @@
+/*
+ * pam_access module
+ *
+ * Written by Alexei Nogin <alexei@nogin.dnttm.ru> 1997/06/15
+ * (I took login_access from logdaemon-5.6 and converted it to PAM
+ * using parts of pam_time code.)
+ *
+ ************************************************************************
+ * Copyright message from logdaemon-5.6 (original file name DISCLAIMER)
+ ************************************************************************
+ * Copyright 1995 by Wietse Venema. All rights reserved. Individual files
+ * may be covered by other copyrights (as noted in the file itself.)
+ *
+ * This material was originally written and compiled by Wietse Venema at
+ * Eindhoven University of Technology, The Netherlands, in 1990, 1991,
+ * 1992, 1993, 1994 and 1995.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this entire copyright notice is duplicated in all such
+ * copies.
+ *
+ * This software is provided "as is" and without any expressed or implied
+ * warranties, including, without limitation, the implied warranties of
+ * merchantability and fitness for any particular purpose.
+ *************************************************************************
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <stdarg.h>
+#include <syslog.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <grp.h>
+#include <errno.h>
+#include <ctype.h>
+#include <sys/utsname.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <glob.h>
+#ifdef HAVE_LIBAUDIT
+#include <libaudit.h>
+#endif
+
+#include <security/_pam_macros.h>
+#include <security/pam_modules.h>
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+#include "pam_cc_compat.h"
+#include "pam_inline.h"
+
+/* login_access.c from logdaemon-5.6 with several changes by A.Nogin: */
+
+ /*
+ * This module implements a simple but effective form of login access
+ * control based on login names and on host (or domain) names, internet
+ * addresses (or network numbers), or on terminal line names in case of
+ * non-networked logins. Diagnostics are reported through syslog(3).
+ *
+ * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
+ */
+
+#if !defined(MAXHOSTNAMELEN) || (MAXHOSTNAMELEN < 64)
+#undef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN 256
+#endif
+
+ /* Delimiters for fields and for lists of users, ttys or hosts. */
+
+
+#define ALL 2
+#define YES 1
+#define NO 0
+#define NOMATCH -1
+
+ /*
+ * A structure to bundle up all login-related information to keep the
+ * functional interfaces as generic as possible.
+ */
+struct login_info {
+ const struct passwd *user;
+ const char *from;
+ const char *config_file;
+ const char *hostname;
+ int debug; /* Print debugging messages. */
+ int only_new_group_syntax; /* Only allow group entries of the form "(xyz)" */
+ int noaudit; /* Do not audit denials */
+ const char *fs; /* field separator */
+ const char *sep; /* list-element separator */
+ int from_remote_host; /* If PAM_RHOST was used for from */
+ struct addrinfo *res; /* Cached DNS resolution of from */
+ int gai_rv; /* Cached retval of getaddrinfo */
+};
+
+/* Parse module config arguments */
+
+static int
+parse_args(pam_handle_t *pamh, struct login_info *loginfo,
+ int argc, const char **argv)
+{
+ int i;
+
+ loginfo->noaudit = NO;
+ loginfo->debug = NO;
+ loginfo->only_new_group_syntax = NO;
+ loginfo->fs = ":";
+ loginfo->sep = ", \t";
+ for (i=0; i<argc; ++i) {
+ const char *str;
+
+ if ((str = pam_str_skip_prefix(argv[i], "fieldsep=")) != NULL) {
+
+ /* the admin wants to override the default field separators */
+ loginfo->fs = str;
+
+ } else if ((str = pam_str_skip_prefix(argv[i], "listsep=")) != NULL) {
+
+ /* the admin wants to override the default list separators */
+ loginfo->sep = str;
+
+ } else if ((str = pam_str_skip_prefix(argv[i], "accessfile=")) != NULL) {
+ FILE *fp = fopen(str, "r");
+
+ if (fp) {
+ loginfo->config_file = str;
+ fclose(fp);
+ } else {
+ pam_syslog(pamh, LOG_ERR,
+ "failed to open accessfile=[%s]: %m", str);
+ return 0;
+ }
+
+ } else if (strcmp (argv[i], "debug") == 0) {
+ loginfo->debug = YES;
+ } else if (strcmp (argv[i], "nodefgroup") == 0) {
+ loginfo->only_new_group_syntax = YES;
+ } else if (strcmp (argv[i], "noaudit") == 0) {
+ loginfo->noaudit = YES;
+ } else {
+ pam_syslog(pamh, LOG_ERR, "unrecognized option [%s]", argv[i]);
+ }
+ }
+
+ return 1; /* OK */
+}
+
+/* --- static functions for checking whether the user should be let in --- */
+
+typedef int match_func (pam_handle_t *, char *, struct login_info *);
+
+static int list_match (pam_handle_t *, char *, char *, struct login_info *,
+ match_func *);
+static int user_match (pam_handle_t *, char *, struct login_info *);
+static int group_match (pam_handle_t *, const char *, const char *, int);
+static int from_match (pam_handle_t *, char *, struct login_info *);
+static int remote_match (pam_handle_t *, char *, struct login_info *);
+static int string_match (pam_handle_t *, const char *, const char *, int);
+static int network_netmask_match (pam_handle_t *, const char *, const char *, struct login_info *);
+
+
+/* isipaddr - find out if string provided is an IP address or not */
+
+static int
+isipaddr (const char *string, int *addr_type,
+ struct sockaddr_storage *addr)
+{
+ struct sockaddr_storage local_addr;
+ int is_ip;
+
+ /* We use struct sockaddr_storage addr because
+ * struct in_addr/in6_addr is an integral part
+ * of struct sockaddr and we doesn't want to
+ * use its value.
+ */
+
+ if (addr == NULL)
+ addr = &local_addr;
+
+ memset(addr, 0, sizeof(struct sockaddr_storage));
+
+ /* first ipv4 */
+ if (inet_pton(AF_INET, string, addr) > 0)
+ {
+ if (addr_type != NULL)
+ *addr_type = AF_INET;
+
+ is_ip = YES;
+ }
+ else if (inet_pton(AF_INET6, string, addr) > 0)
+ { /* then ipv6 */
+ if (addr_type != NULL) {
+ *addr_type = AF_INET6;
+ }
+ is_ip = YES;
+ }
+ else
+ is_ip = NO;
+
+ return is_ip;
+}
+
+
+/* are_addresses_equal - translate IP address strings to real IP
+ * addresses and compare them to find out if they are equal.
+ * If netmask was provided it will be used to focus comparison to
+ * relevant bits.
+ */
+static int
+are_addresses_equal (const char *ipaddr0, const char *ipaddr1,
+ const char *netmask)
+{
+ struct sockaddr_storage addr0;
+ struct sockaddr_storage addr1;
+ int addr_type0 = 0;
+ int addr_type1 = 0;
+
+ if (isipaddr (ipaddr0, &addr_type0, &addr0) == NO)
+ return NO;
+
+ if (isipaddr (ipaddr1, &addr_type1, &addr1) == NO)
+ return NO;
+
+ if (addr_type0 != addr_type1)
+ /* different address types */
+ return NO;
+
+ if (netmask != NULL) {
+ /* Got a netmask, so normalize addresses? */
+ struct sockaddr_storage nmask;
+ unsigned char *byte_a, *byte_nm;
+
+ memset(&nmask, 0, sizeof(struct sockaddr_storage));
+ if (inet_pton(addr_type0, netmask, (void *)&nmask) > 0) {
+ unsigned int i;
+ byte_a = (unsigned char *)(&addr0);
+ byte_nm = (unsigned char *)(&nmask);
+ for (i=0; i<sizeof(struct sockaddr_storage); i++) {
+ byte_a[i] = byte_a[i] & byte_nm[i];
+ }
+
+ byte_a = (unsigned char *)(&addr1);
+ byte_nm = (unsigned char *)(&nmask);
+ for (i=0; i<sizeof(struct sockaddr_storage); i++) {
+ byte_a[i] = byte_a[i] & byte_nm[i];
+ }
+ }
+ }
+
+
+ /* Are the two addresses equal? */
+ if (memcmp((void *)&addr0, (void *)&addr1,
+ sizeof(struct sockaddr_storage)) == 0) {
+ return(YES);
+ }
+
+ return(NO);
+}
+
+static char *
+number_to_netmask (long netmask, int addr_type,
+ char *ipaddr_buf, size_t ipaddr_buf_len)
+{
+ /* We use struct sockaddr_storage addr because
+ * struct in_addr/in6_addr is an integral part
+ * of struct sockaddr and we doesn't want to
+ * use its value.
+ */
+ struct sockaddr_storage nmask;
+ unsigned char *byte_nm;
+ const char *ipaddr_dst = NULL;
+ int i, ip_bytes;
+
+ if (netmask == 0) {
+ /* mask 0 is the same like no mask */
+ return(NULL);
+ }
+
+ memset(&nmask, 0, sizeof(struct sockaddr_storage));
+ if (addr_type == AF_INET6) {
+ /* ipv6 address mask */
+ ip_bytes = 16;
+ } else {
+ /* default might be an ipv4 address mask */
+ addr_type = AF_INET;
+ ip_bytes = 4;
+ }
+
+ byte_nm = (unsigned char *)(&nmask);
+ /* translate number to mask */
+ for (i=0; i<ip_bytes; i++) {
+ if (netmask >= 8) {
+ byte_nm[i] = 0xff;
+ netmask -= 8;
+ } else
+ if (netmask > 0) {
+ byte_nm[i] = 0xff << (8 - netmask);
+ break;
+ } else
+ if (netmask <= 0) {
+ break;
+ }
+ }
+
+ /* now generate netmask address string */
+ ipaddr_dst = inet_ntop(addr_type, &nmask, ipaddr_buf, ipaddr_buf_len);
+ if (ipaddr_dst == ipaddr_buf) {
+ return (ipaddr_buf);
+ }
+
+ return (NULL);
+}
+
+/* login_access - match username/group and host/tty with access control file */
+
+static int
+login_access (pam_handle_t *pamh, struct login_info *item)
+{
+ FILE *fp;
+ char line[BUFSIZ];
+ char *perm; /* becomes permission field */
+ char *users; /* becomes list of login names */
+ char *froms; /* becomes list of terminals or hosts */
+ int match = NO;
+#ifdef HAVE_LIBAUDIT
+ int nonall_match = NO;
+#endif
+ int end;
+ int lineno = 0; /* for diagnostics */
+ char *sptr;
+
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "login_access: user=%s, from=%s, file=%s",
+ item->user->pw_name,
+ item->from, item->config_file);
+
+ /*
+ * Process the table one line at a time and stop at the first match.
+ * Blank lines and lines that begin with a '#' character are ignored.
+ * Non-comment lines are broken at the ':' character. All fields are
+ * mandatory. The first field should be a "+" or "-" character. A
+ * non-existing table means no access control.
+ */
+
+ if ((fp = fopen(item->config_file, "r"))!=NULL) {
+ while (!match && fgets(line, sizeof(line), fp)) {
+ lineno++;
+ if (line[end = strlen(line) - 1] != '\n') {
+ pam_syslog(pamh, LOG_ERR,
+ "%s: line %d: missing newline or line too long",
+ item->config_file, lineno);
+ continue;
+ }
+ if (line[0] == '#')
+ continue; /* comment line */
+ while (end > 0 && isspace(line[end - 1]))
+ end--;
+ line[end] = 0; /* strip trailing whitespace */
+ if (line[0] == 0) /* skip blank lines */
+ continue;
+
+ /* Allow field separator in last field of froms */
+ if (!(perm = strtok_r(line, item->fs, &sptr))
+ || !(users = strtok_r(NULL, item->fs, &sptr))
+ || !(froms = strtok_r(NULL, "\n", &sptr))) {
+ pam_syslog(pamh, LOG_ERR, "%s: line %d: bad field count",
+ item->config_file, lineno);
+ continue;
+ }
+ if (perm[0] != '+' && perm[0] != '-') {
+ pam_syslog(pamh, LOG_ERR, "%s: line %d: bad first field",
+ item->config_file, lineno);
+ continue;
+ }
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "line %d: %s : %s : %s", lineno, perm, users, froms);
+ match = list_match(pamh, users, NULL, item, user_match);
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG, "user_match=%d, \"%s\"",
+ match, item->user->pw_name);
+ if (match) {
+ match = list_match(pamh, froms, NULL, item, from_match);
+#ifdef HAVE_LIBAUDIT
+ if (!match && perm[0] == '+') {
+ nonall_match = YES;
+ }
+#endif
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "from_match=%d, \"%s\"", match, item->from);
+ }
+ }
+ (void) fclose(fp);
+ } else if (errno == ENOENT) {
+ /* This is no error. */
+ pam_syslog(pamh, LOG_WARNING, "warning: cannot open %s: %m",
+ item->config_file);
+ } else {
+ pam_syslog(pamh, LOG_ERR, "cannot open %s: %m", item->config_file);
+ return NO;
+ }
+#ifdef HAVE_LIBAUDIT
+ if (!item->noaudit && (match == YES || (match == ALL &&
+ nonall_match == YES)) && line[0] == '-') {
+ pam_modutil_audit_write(pamh, AUDIT_ANOM_LOGIN_LOCATION,
+ "pam_access", 0);
+ }
+#endif
+ if (match == NO)
+ return NOMATCH;
+ if (line[0] == '+')
+ return YES;
+ return NO;
+}
+
+
+/* list_match - match an item against a list of tokens with exceptions */
+
+static int
+list_match(pam_handle_t *pamh, char *list, char *sptr,
+ struct login_info *item, match_func *match_fn)
+{
+ char *tok;
+ int match = NO;
+
+ if (item->debug && list != NULL)
+ pam_syslog (pamh, LOG_DEBUG,
+ "list_match: list=%s, item=%s", list, item->user->pw_name);
+
+ /*
+ * Process tokens one at a time. We have exhausted all possible matches
+ * when we reach an "EXCEPT" token or the end of the list. If we do find
+ * a match, look for an "EXCEPT" list and recurse to determine whether
+ * the match is affected by any exceptions.
+ */
+
+ for (tok = strtok_r(list, item->sep, &sptr); tok != 0;
+ tok = strtok_r(NULL, item->sep, &sptr)) {
+ if (strcasecmp(tok, "EXCEPT") == 0) /* EXCEPT: give up */
+ break;
+ if ((match = (*match_fn) (pamh, tok, item))) /* YES */
+ break;
+ }
+ /* Process exceptions to matches. */
+
+ if (match != NO) {
+ while ((tok = strtok_r(NULL, item->sep, &sptr)) && strcasecmp(tok, "EXCEPT"))
+ /* VOID */ ;
+ if (tok == 0)
+ return match;
+ if (list_match(pamh, NULL, sptr, item, match_fn) == NO)
+ return YES; /* drop special meaning of ALL */
+ }
+ return (NO);
+}
+
+/* netgroup_match - match group against machine or user */
+
+static int
+netgroup_match (pam_handle_t *pamh, const char *netgroup,
+ const char *machine, const char *user, int debug)
+{
+ int retval;
+ char *mydomain = NULL;
+
+#ifdef HAVE_GETDOMAINNAME
+ char domainname_res[256];
+
+ if (getdomainname (domainname_res, sizeof (domainname_res)) == 0)
+ {
+ if (domainname_res[0] != '\0' && strcmp (domainname_res, "(none)") != 0)
+ {
+ mydomain = domainname_res;
+ }
+ }
+#endif
+
+#ifdef HAVE_INNETGR
+ retval = innetgr (netgroup, machine, user, mydomain);
+#else
+ retval = 0;
+ pam_syslog (pamh, LOG_ERR, "pam_access does not have netgroup support");
+#endif
+ if (debug == YES)
+ pam_syslog (pamh, LOG_DEBUG,
+ "netgroup_match: %d (netgroup=%s, machine=%s, user=%s, domain=%s)",
+ retval, netgroup ? netgroup : "NULL",
+ machine ? machine : "NULL",
+ user ? user : "NULL", mydomain ? mydomain : "NULL");
+ return retval;
+}
+
+/* user_match - match a username against one token */
+
+static int
+user_match (pam_handle_t *pamh, char *tok, struct login_info *item)
+{
+ char *string = item->user->pw_name;
+ struct login_info fake_item;
+ char *at;
+ int rv;
+
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "user_match: tok=%s, item=%s", tok, string);
+
+ /*
+ * If a token has the magic value "ALL" the match always succeeds.
+ * Otherwise, return YES if the token fully matches the username, if the
+ * token is a group that contains the username, or if the token is the
+ * name of the user's primary group.
+ */
+
+ /* Try to split on a pattern (@*[^@]+)(@+.*) */
+ for (at = tok; *at == '@'; ++at);
+
+ if (tok[0] == '(' && tok[strlen(tok) - 1] == ')') {
+ return (group_match (pamh, tok, string, item->debug));
+ } else if ((at = strchr(at, '@')) != NULL) {
+ /* split user@host pattern */
+ if (item->hostname == NULL)
+ return NO;
+ memcpy (&fake_item, item, sizeof(fake_item));
+ fake_item.from = item->hostname;
+ fake_item.gai_rv = 0;
+ fake_item.res = NULL;
+ fake_item.from_remote_host = 1; /* hostname should be resolvable */
+ *at = 0;
+ if (!user_match (pamh, tok, item))
+ return NO;
+ rv = from_match (pamh, at + 1, &fake_item);
+ if (fake_item.gai_rv == 0 && fake_item.res)
+ freeaddrinfo(fake_item.res);
+ return rv;
+ } else if (tok[0] == '@') { /* netgroup */
+ const char *hostname = NULL;
+ if (tok[1] == '@') { /* add hostname to netgroup match */
+ if (item->hostname == NULL)
+ return NO;
+ ++tok;
+ hostname = item->hostname;
+ }
+ return (netgroup_match (pamh, tok + 1, hostname, string, item->debug));
+ } else if ((rv=string_match (pamh, tok, string, item->debug)) != NO) /* ALL or exact match */
+ return rv;
+ else if (item->only_new_group_syntax == NO &&
+ pam_modutil_user_in_group_nam_nam (pamh,
+ item->user->pw_name, tok))
+ /* try group membership */
+ return YES;
+
+ return NO;
+}
+
+
+/* group_match - match a username against token named group */
+
+static int
+group_match (pam_handle_t *pamh, const char *tok, const char* usr,
+ int debug)
+{
+ char grptok[BUFSIZ];
+
+ if (debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "group_match: grp=%s, user=%s", tok, usr);
+
+ if (strlen(tok) < 3)
+ return NO;
+
+ /* token is received under the format '(...)' */
+ memset(grptok, 0, BUFSIZ);
+ strncpy(grptok, tok + 1, strlen(tok) - 2);
+
+ if (pam_modutil_user_in_group_nam_nam(pamh, usr, grptok))
+ return YES;
+
+ return NO;
+}
+
+
+/* from_match - match a host or tty against a list of tokens */
+
+static int
+from_match (pam_handle_t *pamh, char *tok, struct login_info *item)
+{
+ const char *string = item->from;
+ int rv;
+
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "from_match: tok=%s, item=%s", tok, string);
+
+ /*
+ * If a token has the magic value "ALL" the match always succeeds. Return
+ * YES if the token fully matches the string. If the token is a domain
+ * name, return YES if it matches the last fields of the string. If the
+ * token has the magic value "LOCAL", return YES if the from field was
+ * not taken by PAM_RHOST. If the token is a network number, return YES
+ * if it matches the head of the string.
+ */
+
+ if (string == NULL) {
+ return NO;
+ } else if (tok[0] == '@') { /* netgroup */
+ return (netgroup_match (pamh, tok + 1, string, (char *) 0, item->debug));
+ } else if ((rv = string_match(pamh, tok, string, item->debug)) != NO) {
+ /* ALL or exact match */
+ return rv;
+ } else if (strcasecmp(tok, "LOCAL") == 0) {
+ /* LOCAL matches only local accesses */
+ if (!item->from_remote_host)
+ return YES;
+ return NO;
+ } else if (item->from_remote_host) {
+ return remote_match(pamh, tok, item);
+ }
+ return NO;
+}
+
+static int
+remote_match (pam_handle_t *pamh, char *tok, struct login_info *item)
+{
+ const char *string = item->from;
+ size_t tok_len = strlen(tok);
+ size_t str_len;
+
+ if (tok[0] == '.') { /* domain: match last fields */
+ if ((str_len = strlen(string)) > tok_len
+ && strcasecmp(tok, string + str_len - tok_len) == 0)
+ return YES;
+ } else if (tok[tok_len - 1] == '.') {
+ struct addrinfo hint;
+
+ memset (&hint, '\0', sizeof (hint));
+ hint.ai_flags = AI_CANONNAME;
+ hint.ai_family = AF_INET;
+
+ if (item->gai_rv != 0)
+ return NO;
+ else if (!item->res &&
+ (item->gai_rv = getaddrinfo (string, NULL, &hint, &item->res)) != 0)
+ return NO;
+ else
+ {
+ struct addrinfo *runp = item->res;
+
+ while (runp != NULL)
+ {
+ char buf[INET_ADDRSTRLEN+2];
+
+ if (runp->ai_family == AF_INET)
+ {
+ DIAG_PUSH_IGNORE_CAST_ALIGN;
+ inet_ntop (runp->ai_family,
+ &((struct sockaddr_in *) runp->ai_addr)->sin_addr,
+ buf, sizeof (buf));
+ DIAG_POP_IGNORE_CAST_ALIGN;
+
+ strcat (buf, ".");
+
+ if (strncmp(tok, buf, tok_len) == 0)
+ {
+ return YES;
+ }
+ }
+ runp = runp->ai_next;
+ }
+ }
+ return NO;
+ }
+
+ /* Assume network/netmask with an IP of a host. */
+ return network_netmask_match(pamh, tok, string, item);
+}
+
+/* string_match - match a string against one token */
+
+static int
+string_match (pam_handle_t *pamh, const char *tok, const char *string,
+ int debug)
+{
+
+ if (debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "string_match: tok=%s, item=%s", tok, string);
+
+ /*
+ * If the token has the magic value "ALL" the match always succeeds.
+ * Otherwise, return YES if the token fully matches the string.
+ * "NONE" token matches NULL string.
+ */
+
+ if (strcasecmp(tok, "ALL") == 0) { /* all: always matches */
+ return (ALL);
+ } else if (string != NULL) {
+ if (strcasecmp(tok, string) == 0) { /* try exact match */
+ return (YES);
+ }
+ } else if (strcasecmp(tok, "NONE") == 0) {
+ return (YES);
+ }
+ return (NO);
+}
+
+
+/* network_netmask_match - match a string against one token
+ * where string is a hostname or ip (v4,v6) address and tok
+ * represents either a single ip (v4,v6) address or a network/netmask
+ */
+static int
+network_netmask_match (pam_handle_t *pamh,
+ const char *tok, const char *string, struct login_info *item)
+{
+ char *netmask_ptr;
+ char netmask_string[MAXHOSTNAMELEN + 1];
+ int addr_type;
+
+ if (item->debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "network_netmask_match: tok=%s, item=%s", tok, string);
+ /* OK, check if tok is of type addr/mask */
+ if ((netmask_ptr = strchr(tok, '/')) != NULL)
+ {
+ long netmask = 0;
+
+ /* YES */
+ *netmask_ptr = 0;
+ netmask_ptr++;
+
+ if (isipaddr(tok, &addr_type, NULL) == NO)
+ { /* no netaddr */
+ return NO;
+ }
+
+ /* check netmask */
+ if (isipaddr(netmask_ptr, NULL, NULL) == NO)
+ { /* netmask as integre value */
+ char *endptr = NULL;
+ netmask = strtol(netmask_ptr, &endptr, 0);
+ if ((endptr == netmask_ptr) || (*endptr != '\0'))
+ { /* invalid netmask value */
+ return NO;
+ }
+ if ((netmask < 0)
+ || (addr_type == AF_INET && netmask > 32)
+ || (addr_type == AF_INET6 && netmask > 128))
+ { /* netmask value out of range */
+ return NO;
+ }
+
+ netmask_ptr = number_to_netmask(netmask, addr_type,
+ netmask_string, MAXHOSTNAMELEN);
+ }
+ }
+ else
+ /* NO, then check if it is only an addr */
+ if (isipaddr(tok, NULL, NULL) != YES)
+ {
+ return NO;
+ }
+
+ if (isipaddr(string, NULL, NULL) != YES)
+ {
+ /* Assume network/netmask with a name of a host. */
+ struct addrinfo hint;
+
+ memset (&hint, '\0', sizeof (hint));
+ hint.ai_flags = AI_CANONNAME;
+ hint.ai_family = AF_UNSPEC;
+
+ if (item->gai_rv != 0)
+ return NO;
+ else if (!item->res &&
+ (item->gai_rv = getaddrinfo (string, NULL, &hint, &item->res)) != 0)
+ return NO;
+ else
+ {
+ struct addrinfo *runp = item->res;
+
+ while (runp != NULL)
+ {
+ char buf[INET6_ADDRSTRLEN];
+
+ DIAG_PUSH_IGNORE_CAST_ALIGN;
+ inet_ntop (runp->ai_family,
+ runp->ai_family == AF_INET
+ ? (void *) &((struct sockaddr_in *) runp->ai_addr)->sin_addr
+ : (void *) &((struct sockaddr_in6 *) runp->ai_addr)->sin6_addr,
+ buf, sizeof (buf));
+ DIAG_POP_IGNORE_CAST_ALIGN;
+
+ if (are_addresses_equal(buf, tok, netmask_ptr))
+ {
+ return YES;
+ }
+ runp = runp->ai_next;
+ }
+ }
+ }
+ else
+ return (are_addresses_equal(string, tok, netmask_ptr));
+
+ return NO;
+}
+
+
+/* --- public PAM management functions --- */
+
+int
+pam_sm_authenticate (pam_handle_t *pamh, int flags UNUSED,
+ int argc, const char **argv)
+{
+ struct login_info loginfo;
+ const char *user=NULL;
+ const void *void_from=NULL;
+ const char *from;
+ const char *default_config = PAM_ACCESS_CONFIG;
+ struct passwd *user_pw;
+ char hostname[MAXHOSTNAMELEN + 1];
+ int rv;
+
+
+ /* set username */
+
+ if (pam_get_user(pamh, &user, NULL) != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_NOTICE, "cannot determine user name");
+ return PAM_USER_UNKNOWN;
+ }
+
+ if ((user_pw=pam_modutil_getpwnam(pamh, user))==NULL)
+ return (PAM_USER_UNKNOWN);
+
+ /*
+ * Bundle up the arguments to avoid unnecessary clumsiness later on.
+ */
+ memset(&loginfo, '\0', sizeof(loginfo));
+ loginfo.user = user_pw;
+ loginfo.config_file = default_config;
+
+ /* parse the argument list */
+
+ if (!parse_args(pamh, &loginfo, argc, argv)) {
+ pam_syslog(pamh, LOG_ERR, "failed to parse the module arguments");
+ return PAM_ABORT;
+ }
+
+ /* remote host name */
+
+ if (pam_get_item(pamh, PAM_RHOST, &void_from)
+ != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_ERR, "cannot find the remote host name");
+ return PAM_ABORT;
+ }
+ from = void_from;
+
+ if ((from==NULL) || (*from=='\0')) {
+
+ /* local login, set tty name */
+
+ loginfo.from_remote_host = 0;
+
+ if (pam_get_item(pamh, PAM_TTY, &void_from) != PAM_SUCCESS
+ || void_from == NULL) {
+ D(("PAM_TTY not set, probing stdin"));
+ from = ttyname(STDIN_FILENO);
+ if (from != NULL) {
+ if (pam_set_item(pamh, PAM_TTY, from) != PAM_SUCCESS)
+ pam_syslog(pamh, LOG_WARNING, "couldn't set tty name");
+ } else {
+ if (pam_get_item(pamh, PAM_SERVICE, &void_from) != PAM_SUCCESS
+ || void_from == NULL) {
+ pam_syslog (pamh, LOG_ERR,
+ "cannot determine remote host, tty or service name");
+ return PAM_ABORT;
+ }
+ from = void_from;
+ if (loginfo.debug)
+ pam_syslog (pamh, LOG_DEBUG,
+ "cannot determine tty or remote hostname, using service %s",
+ from);
+ }
+ }
+ else
+ from = void_from;
+
+ if (from[0] == '/') { /* full path, remove device path. */
+ const char *f;
+ from++;
+ if ((f = strchr(from, '/')) != NULL) {
+ from = f + 1;
+ }
+ }
+ }
+ else
+ loginfo.from_remote_host = 1;
+
+ loginfo.from = from;
+
+ hostname[sizeof(hostname)-1] = '\0';
+ if (gethostname(hostname, sizeof(hostname)-1) == 0)
+ loginfo.hostname = hostname;
+ else {
+ pam_syslog (pamh, LOG_ERR, "gethostname failed: %m");
+ loginfo.hostname = NULL;
+ }
+
+ rv = login_access(pamh, &loginfo);
+
+ if (rv == NOMATCH && loginfo.config_file == default_config) {
+ glob_t globbuf;
+ int i, glob_rv;
+
+ /* We do not manipulate locale as setlocale() is not
+ * thread safe. We could use uselocale() in future.
+ */
+ glob_rv = glob(ACCESS_CONF_GLOB, GLOB_ERR, NULL, &globbuf);
+ if (!glob_rv) {
+ /* Parse the *.conf files. */
+ for (i = 0; globbuf.gl_pathv[i] != NULL; i++) {
+ loginfo.config_file = globbuf.gl_pathv[i];
+ rv = login_access(pamh, &loginfo);
+ if (rv != NOMATCH)
+ break;
+ }
+ globfree(&globbuf);
+ }
+ }
+
+ if (loginfo.gai_rv == 0 && loginfo.res)
+ freeaddrinfo(loginfo.res);
+
+ if (rv) {
+ return (PAM_SUCCESS);
+ } else {
+ pam_syslog(pamh, LOG_ERR,
+ "access denied for user `%s' from `%s'",user,from);
+ return (PAM_PERM_DENIED);
+ }
+}
+
+int
+pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ return PAM_IGNORE;
+}
+
+int
+pam_sm_acct_mgmt (pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ return pam_sm_authenticate (pamh, flags, argc, argv);
+}
+
+int
+pam_sm_open_session(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+int
+pam_sm_close_session(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+int
+pam_sm_chauthtok(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+/* end of module definition */
diff --git a/modules/pam_access/tst-pam_access b/modules/pam_access/tst-pam_access
new file mode 100755
index 0000000..271e69f
--- /dev/null
+++ b/modules/pam_access/tst-pam_access
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_access.so
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 03:31:39 +0000