Adding upstream version 1.3.1.upstream/1.3.1 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-05-06 01:38:36 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-05-06 01:38:36 +0000
commit: 26367bfc399cb3862f94ddca8fce87f98f26d67e (patch)
tree: ba3a4e02ed5ec62fe645dfa810c01d26decf591f /modules/pam_selinux
parent: Initial commit. (diff)
download: pam-upstream/1.3.1.tar.xz
pam-upstream/1.3.1.zip
10 files changed, 2782 insertions, 0 deletions
diff --git a/modules/pam_selinux/Makefile.am b/modules/pam_selinux/Makefile.am
new file mode 100644
index 0000000..28c60d8
--- /dev/null
+++ b/modules/pam_selinux/Makefile.am
@@ -0,0 +1,40 @@
+#
+# Copyright (c) 2005, 2006, 2007 Thorsten Kukuk <kukuk@thkukuk.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = README $(XMLS) pam_selinux.8 pam_selinux_check.8 \
+		tst-pam_selinux
+
+if HAVE_LIBSELINUX
+  TESTS = tst-pam_selinux
+  man_MANS = pam_selinux.8
+endif
+
+XMLS = README.xml pam_selinux.8.xml
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+	-I$(top_srcdir)/libpam_misc/include
+
+pam_selinux_la_LDFLAGS = -no-undefined -avoid-version -module
+pam_selinux_la_LIBADD = $(top_builddir)/libpam/libpam.la @LIBSELINUX@ @LIBAUDIT@
+if HAVE_VERSIONING
+  pam_selinux_la_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+if HAVE_LIBSELINUX
+  securelib_LTLIBRARIES = pam_selinux.la
+  noinst_PROGRAMS = pam_selinux_check
+  pam_selinux_check_LDADD = $(top_builddir)/libpam/libpam.la \
+			    $(top_builddir)/libpam_misc/libpam_misc.la
+endif
+if ENABLE_REGENERATE_MAN
+noinst_DATA = README pam_selinux.8
+README: pam_selinux.8.xml
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_selinux/Makefile.in b/modules/pam_selinux/Makefile.in
new file mode 100644
index 0000000..6c39eef
--- /dev/null
+++ b/modules/pam_selinux/Makefile.in
@@ -0,0 +1,1150 @@
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+am__installdirs = "$(DESTDIR)$(securelibdir)" "$(DESTDIR)$(man8dir)"
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+GREP = @GREP@
+HAVE_KEY_MANAGEMENT = @HAVE_KEY_MANAGEMENT@
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+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LEX = @LEX@
+LEXLIB = @LEXLIB@
+LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@
+LIBAUDIT = @LIBAUDIT@
+LIBCRACK = @LIBCRACK@
+LIBCRYPT = @LIBCRYPT@
+LIBDB = @LIBDB@
+LIBDL = @LIBDL@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBOBJS = @LIBOBJS@
+LIBPRELUDE_CFLAGS = @LIBPRELUDE_CFLAGS@
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+SECUREDIR = @SECUREDIR@
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+SHELL = @SHELL@
+STRIP = @STRIP@
+TIRPC_CFLAGS = @TIRPC_CFLAGS@
+TIRPC_LIBS = @TIRPC_LIBS@
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+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+EXTRA_DIST = README $(XMLS) pam_selinux.8 pam_selinux_check.8 \
+		tst-pam_selinux
+
+@HAVE_LIBSELINUX_TRUE@TESTS = tst-pam_selinux
+@HAVE_LIBSELINUX_TRUE@man_MANS = pam_selinux.8
+XMLS = README.xml pam_selinux.8.xml
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+secureconfdir = $(SCONFIGDIR)
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
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+
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+	$(am__append_1)
+pam_selinux_la_LIBADD = $(top_builddir)/libpam/libpam.la @LIBSELINUX@ @LIBAUDIT@
+@HAVE_LIBSELINUX_TRUE@securelib_LTLIBRARIES = pam_selinux.la
+@HAVE_LIBSELINUX_TRUE@pam_selinux_check_LDADD = $(top_builddir)/libpam/libpam.la \
+@HAVE_LIBSELINUX_TRUE@			    $(top_builddir)/libpam_misc/libpam_misc.la
+
+@ENABLE_REGENERATE_MAN_TRUE@noinst_DATA = README pam_selinux.8
+all: all-am
+
+.SUFFIXES:
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+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu modules/pam_selinux/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu modules/pam_selinux/Makefile
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+	@case '$?' in \
+	  *config.status*) \
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+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
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+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
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+install-securelibLTLIBRARIES: $(securelib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(securelib_LTLIBRARIES)'; test -n "$(securelibdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(securelibdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(securelibdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(securelibdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(securelibdir)"; \
+	}
+
+uninstall-securelibLTLIBRARIES:
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+	@list='$(securelib_LTLIBRARIES)'; test -n "$(securelibdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(securelibdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(securelibdir)/$$f"; \
+	done
+
+clean-securelibLTLIBRARIES:
+	-test -z "$(securelib_LTLIBRARIES)" || rm -f $(securelib_LTLIBRARIES)
+	@list='$(securelib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+pam_selinux.la: $(pam_selinux_la_OBJECTS) $(pam_selinux_la_DEPENDENCIES) $(EXTRA_pam_selinux_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(pam_selinux_la_LINK) $(am_pam_selinux_la_rpath) $(pam_selinux_la_OBJECTS) $(pam_selinux_la_LIBADD) $(LIBS)
+
+clean-noinstPROGRAMS:
+	@list='$(noinst_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+pam_selinux_check$(EXEEXT): $(pam_selinux_check_OBJECTS) $(pam_selinux_check_DEPENDENCIES) $(EXTRA_pam_selinux_check_DEPENDENCIES) 
+	@rm -f pam_selinux_check$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(pam_selinux_check_OBJECTS) $(pam_selinux_check_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pam_selinux.Plo@am__quote@
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+
+clean-libtool:
+	-rm -rf .libs _libs
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+	@$(NORMAL_INSTALL)
+	@list1=''; \
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+distclean-tags:
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+# Recover from deleted '.trs' file; this should ensure that
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+.log.trs:
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+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
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+	echo "$${col}Testsuite summary for $(PACKAGE_STRING)$${std}";	\
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+	  echo "$$col$$br$$std";					\
+	fi;								\
+	$$success || exit 1
+
+check-TESTS:
+	@list='$(RECHECK_LOGS)';           test -z "$$list" || rm -f $$list
+	@list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
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+recheck: all 
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+	bases=`for i in $$bases; do echo $$i; done \
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
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+@ENABLE_REGENERATE_MAN_TRUE@README: pam_selinux.8.xml
+@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
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diff --git a/modules/pam_selinux/README b/modules/pam_selinux/README
new file mode 100644
index 0000000..fb4d449
--- /dev/null
+++ b/modules/pam_selinux/README
@@ -0,0 +1,85 @@
+pam_selinux — PAM module to set the default security context
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+pam_selinux is a PAM module that sets up the default SELinux security context
+for the next executed process.
+
+When a new session is started, the open_session part of the module computes and
+sets up the execution security context used for the next execve(2) call, the
+file security context for the controlling terminal, and the security context
+used for creating a new kernel keyring.
+
+When the session is ended, the close_session part of the module restores old
+security contexts that were in effect before the change made by the
+open_session part of the module.
+
+Adding pam_selinux into the PAM stack might disrupt behavior of other PAM
+modules which execute applications. To avoid that, pam_selinux.so open should
+be placed after such modules in the PAM stack, and pam_selinux.so close should
+be placed before them. When such a placement is not feasible, pam_selinux.so
+restore could be used to temporary restore original security contexts.
+
+OPTIONS
+
+open
+
+    Only execute the open_session part of the module.
+
+close
+
+    Only execute the close_session part of the module.
+
+restore
+
+    In open_session part of the module, temporarily restore the security
+    contexts as they were before the previous call of the module. Another call
+    of this module without the restore option will set up the new security
+    contexts again.
+
+nottys
+
+    Do not setup security context of the controlling terminal.
+
+debug
+
+    Turn on debug messages via syslog(3).
+
+verbose
+
+    Attempt to inform the user when security context is set.
+
+select_context
+
+    Attempt to ask the user for a custom security context role. If MLS is on,
+    ask also for sensitivity level.
+
+env_params
+
+    Attempt to obtain a custom security context role from PAM environment. If
+    MLS is on, obtain also sensitivity level. This option and the
+    select_context option are mutually exclusive. The respective PAM
+    environment variables are SELINUX_ROLE_REQUESTED, SELINUX_LEVEL_REQUESTED,
+    and SELINUX_USE_CURRENT_RANGE. The first two variables are self describing
+    and the last one if set to 1 makes the PAM module behave as if the
+    use_current_range was specified on the command line of the module.
+
+use_current_range
+
+    Use the sensitivity level of the current process for the user context
+    instead of the default level. Also suppresses asking of the sensitivity
+    level from the user or obtaining it from PAM environment.
+
+EXAMPLES
+
+auth     required  pam_unix.so
+session  required  pam_permit.so
+session  optional  pam_selinux.so
+
+
+AUTHOR
+
+pam_selinux was written by Dan Walsh <dwalsh@redhat.com>.
+
diff --git a/modules/pam_selinux/README.xml b/modules/pam_selinux/README.xml
new file mode 100644
index 0000000..7e1baf5
--- /dev/null
+++ b/modules/pam_selinux/README.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+"http://www.docbook.org/xml/4.3/docbookx.dtd"
+[
+<!--
+<!ENTITY pamaccess SYSTEM "pam_selinux.8.xml">
+-->
+]>
+
+<article>
+
+  <articleinfo>
+
+    <title>
+      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_selinux.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_selinux-name"]/*)'/>
+    </title>
+
+  </articleinfo>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_selinux.8.xml" xpointer='xpointer(//refsect1[@id = "pam_selinux-description"]/*)'/>
+  </section>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_selinux.8.xml" xpointer='xpointer(//refsect1[@id = "pam_selinux-options"]/*)'/>
+  </section>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_selinux.8.xml" xpointer='xpointer(//refsect1[@id = "pam_selinux-examples"]/*)'/>
+  </section>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_selinux.8.xml" xpointer='xpointer(//refsect1[@id = "pam_selinux-author"]/*)'/>
+  </section>
+
+</article>
diff --git a/modules/pam_selinux/pam_selinux.8 b/modules/pam_selinux/pam_selinux.8
new file mode 100644
index 0000000..5822cc1
--- /dev/null
+++ b/modules/pam_selinux/pam_selinux.8
@@ -0,0 +1,151 @@
+'\" t
+.\"     Title: pam_selinux
+.\"    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_SELINUX" "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_selinux \- PAM module to set the default security context
+.SH "SYNOPSIS"
+.HP \w'\fBpam_selinux\&.so\fR\ 'u
+\fBpam_selinux\&.so\fR [open] [close] [restore] [nottys] [debug] [verbose] [select_context] [env_params] [use_current_range]
+.SH "DESCRIPTION"
+.PP
+pam_selinux is a PAM module that sets up the default SELinux security context for the next executed process\&.
+.PP
+When a new session is started, the open_session part of the module computes and sets up the execution security context used for the next
+\fBexecve\fR(2)
+call, the file security context for the controlling terminal, and the security context used for creating a new kernel keyring\&.
+.PP
+When the session is ended, the close_session part of the module restores old security contexts that were in effect before the change made by the open_session part of the module\&.
+.PP
+Adding pam_selinux into the PAM stack might disrupt behavior of other PAM modules which execute applications\&. To avoid that,
+\fIpam_selinux\&.so open\fR
+should be placed after such modules in the PAM stack, and
+\fIpam_selinux\&.so close\fR
+should be placed before them\&. When such a placement is not feasible,
+\fIpam_selinux\&.so restore\fR
+could be used to temporary restore original security contexts\&.
+.SH "OPTIONS"
+.PP
+\fBopen\fR
+.RS 4
+Only execute the open_session part of the module\&.
+.RE
+.PP
+\fBclose\fR
+.RS 4
+Only execute the close_session part of the module\&.
+.RE
+.PP
+\fBrestore\fR
+.RS 4
+In open_session part of the module, temporarily restore the security contexts as they were before the previous call of the module\&. Another call of this module without the restore option will set up the new security contexts again\&.
+.RE
+.PP
+\fBnottys\fR
+.RS 4
+Do not setup security context of the controlling terminal\&.
+.RE
+.PP
+\fBdebug\fR
+.RS 4
+Turn on debug messages via
+\fBsyslog\fR(3)\&.
+.RE
+.PP
+\fBverbose\fR
+.RS 4
+Attempt to inform the user when security context is set\&.
+.RE
+.PP
+\fBselect_context\fR
+.RS 4
+Attempt to ask the user for a custom security context role\&. If MLS is on, ask also for sensitivity level\&.
+.RE
+.PP
+\fBenv_params\fR
+.RS 4
+Attempt to obtain a custom security context role from PAM environment\&. If MLS is on, obtain also sensitivity level\&. This option and the select_context option are mutually exclusive\&. The respective PAM environment variables are
+\fISELINUX_ROLE_REQUESTED\fR,
+\fISELINUX_LEVEL_REQUESTED\fR, and
+\fISELINUX_USE_CURRENT_RANGE\fR\&. The first two variables are self describing and the last one if set to 1 makes the PAM module behave as if the use_current_range was specified on the command line of the module\&.
+.RE
+.PP
+\fBuse_current_range\fR
+.RS 4
+Use the sensitivity level of the current process for the user context instead of the default level\&. Also suppresses asking of the sensitivity level from the user or obtaining it from PAM environment\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+Only the
+\fBsession\fR
+module type is provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_SUCCESS
+.RS 4
+The security context was set successfully\&.
+.RE
+.PP
+PAM_SESSION_ERR
+.RS 4
+Unable to get or set a valid context\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+The user is not known to the system\&.
+.RE
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory allocation error\&.
+.RE
+.SH "EXAMPLES"
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+auth     required  pam_unix\&.so
+session  required  pam_permit\&.so
+session  optional  pam_selinux\&.so
+    
+.fi
+.if n \{\
+.RE
+.\}
+.SH "SEE ALSO"
+.PP
+\fBexecve\fR(2),
+\fBtty\fR(4),
+\fBpam.d\fR(5),
+\fBpam\fR(8),
+\fBselinux\fR(8)
+.SH "AUTHOR"
+.PP
+pam_selinux was written by Dan Walsh <dwalsh@redhat\&.com>\&.
diff --git a/modules/pam_selinux/pam_selinux.8.xml b/modules/pam_selinux/pam_selinux.8.xml
new file mode 100644
index 0000000..28d465f
--- /dev/null
+++ b/modules/pam_selinux/pam_selinux.8.xml
@@ -0,0 +1,276 @@
+<?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_selinux">
+
+  <refmeta>
+    <refentrytitle>pam_selinux</refentrytitle>
+    <manvolnum>8</manvolnum>
+    <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+  </refmeta>
+
+  <refnamediv id="pam_selinux-name">
+    <refname>pam_selinux</refname>
+    <refpurpose>PAM module to set the default security context</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <cmdsynopsis id="pam_selinux-cmdsynopsis">
+      <command>pam_selinux.so</command>
+      <arg choice="opt">
+	open
+      </arg>
+      <arg choice="opt">
+	close
+      </arg>
+      <arg choice="opt">
+	restore
+      </arg>
+      <arg choice="opt">
+	nottys
+      </arg>
+      <arg choice="opt">
+	debug
+      </arg>
+      <arg choice="opt">
+	verbose
+      </arg>
+      <arg choice="opt">
+	select_context
+      </arg>
+      <arg choice="opt">
+	env_params
+      </arg>
+      <arg choice="opt">
+	use_current_range
+      </arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1 id="pam_selinux-description">
+    <title>DESCRIPTION</title>
+    <para>
+      pam_selinux is a PAM module that sets up the default SELinux security
+      context for the next executed process.
+    </para>
+    <para>
+      When a new session is started, the open_session part of the module
+      computes and sets up the execution security context used for the next
+      <citerefentry>
+        <refentrytitle>execve</refentrytitle><manvolnum>2</manvolnum>
+      </citerefentry>
+      call, the file security context for the controlling terminal, and
+      the security context used for creating a new kernel keyring.
+    </para>
+    <para>
+      When the session is ended, the close_session part of the module restores
+      old security contexts that were in effect before the change made
+      by the open_session part of the module.
+    </para>
+    <para>
+      Adding pam_selinux into the PAM stack might disrupt behavior of other
+      PAM modules which execute applications.  To avoid that,
+      <emphasis>pam_selinux.so open</emphasis> should be placed after such
+      modules in the PAM stack, and <emphasis>pam_selinux.so close</emphasis>
+      should be placed before them.  When such a placement is not feasible,
+      <emphasis>pam_selinux.so restore</emphasis> could be used to temporary
+      restore original security contexts.
+    </para>
+  </refsect1>
+
+  <refsect1 id="pam_selinux-options">
+    <title>OPTIONS</title>
+    <variablelist>
+      <varlistentry>
+        <term>
+          <option>open</option>
+        </term>
+        <listitem>
+          <para>
+            Only execute the open_session part of the module.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>close</option>
+        </term>
+        <listitem>
+          <para>
+            Only execute the close_session part of the module.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>restore</option>
+        </term>
+        <listitem>
+          <para>
+            In open_session part of the module, temporarily restore the
+            security contexts as they were before the previous call of
+            the module.  Another call of this module without the restore
+            option will set up the new security contexts again.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>nottys</option>
+        </term>
+        <listitem>
+          <para>
+            Do not setup security context of the controlling terminal.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>debug</option>
+        </term>
+        <listitem>
+          <para>
+            Turn on debug messages via
+            <citerefentry>
+              <refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum>
+            </citerefentry>.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>verbose</option>
+        </term>
+        <listitem>
+          <para>
+            Attempt to inform the user when security context is set.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>select_context</option>
+        </term>
+        <listitem>
+          <para>
+            Attempt to ask the user for a custom security context role.
+            If MLS is on, ask also for sensitivity level.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>env_params</option>
+        </term>
+        <listitem>
+          <para>
+            Attempt to obtain a custom security context role from PAM environment.
+            If MLS is on, obtain also sensitivity level.  This option and the
+            select_context option are mutually exclusive.  The respective PAM
+            environment variables are <emphasis>SELINUX_ROLE_REQUESTED</emphasis>,
+            <emphasis>SELINUX_LEVEL_REQUESTED</emphasis>, and
+            <emphasis>SELINUX_USE_CURRENT_RANGE</emphasis>.  The first two variables
+            are self describing and the last one if set to 1 makes the PAM module behave as
+            if the use_current_range was specified on the command line of the module.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
+          <option>use_current_range</option>
+        </term>
+        <listitem>
+          <para>
+            Use the sensitivity level of the current process for the user context
+            instead of the default level. Also suppresses asking of the
+            sensitivity level from the user or obtaining it from PAM environment.
+          </para>
+        </listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+
+  <refsect1 id="pam_selinux-types">
+    <title>MODULE TYPES PROVIDED</title>
+    <para>
+      Only the <option>session</option> module type is provided.
+    </para>
+  </refsect1>
+
+  <refsect1 id='pam_selinux-return_values'>
+    <title>RETURN VALUES</title>
+    <variablelist>
+      <varlistentry>
+        <term>PAM_SUCCESS</term>
+        <listitem>
+          <para>
+            The security context was set successfully.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>PAM_SESSION_ERR</term>
+        <listitem>
+          <para>
+            Unable to get or set a valid context.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>PAM_USER_UNKNOWN</term>
+        <listitem>
+          <para>
+            The user is not known to the system.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>PAM_BUF_ERR</term>
+        <listitem>
+          <para>
+            Memory allocation error.
+          </para>
+        </listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+
+  <refsect1 id='pam_selinux-examples'>
+    <title>EXAMPLES</title>
+    <programlisting>
+auth     required  pam_unix.so
+session  required  pam_permit.so
+session  optional  pam_selinux.so
+    </programlisting>
+  </refsect1>
+
+  <refsect1 id='pam_selinux-see_also'>
+    <title>SEE ALSO</title>
+    <para>
+      <citerefentry>
+	<refentrytitle>execve</refentrytitle><manvolnum>2</manvolnum>
+      </citerefentry>,
+      <citerefentry>
+	<refentrytitle>tty</refentrytitle><manvolnum>4</manvolnum>
+      </citerefentry>,
+      <citerefentry>
+	<refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+      </citerefentry>,
+      <citerefentry>
+	<refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+      </citerefentry>,
+      <citerefentry>
+	<refentrytitle>selinux</refentrytitle><manvolnum>8</manvolnum>
+      </citerefentry>
+    </para>
+  </refsect1>
+
+  <refsect1 id='pam_selinux-author'>
+    <title>AUTHOR</title>
+      <para>
+        pam_selinux was written by Dan Walsh &lt;dwalsh@redhat.com&gt;.
+      </para>
+  </refsect1>
+
+</refentry>
diff --git a/modules/pam_selinux/pam_selinux.c b/modules/pam_selinux/pam_selinux.c
new file mode 100644
index 0000000..348cdd4
--- /dev/null
+++ b/modules/pam_selinux/pam_selinux.c
@@ -0,0 +1,841 @@
+/******************************************************************************
+ * A module for Linux-PAM that will set the default security context after login
+ * via PAM.
+ *
+ * Copyright (c) 2003-2008 Red Hat, Inc.
+ * Written by Dan Walsh <dwalsh@redhat.com>
+ * Additional improvements by Tomas Mraz <tmraz@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, and the entire permission notice in its entirety,
+ *    including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <syslog.h>
+
+#define PAM_SM_AUTH
+#define PAM_SM_SESSION
+
+#include <security/pam_modules.h>
+#include <security/_pam_macros.h>
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+
+#include <selinux/selinux.h>
+#include <selinux/get_context_list.h>
+#include <selinux/flask.h>
+#include <selinux/av_permissions.h>
+#include <selinux/selinux.h>
+#include <selinux/context.h>
+#include <selinux/get_default_type.h>
+
+#ifdef HAVE_LIBAUDIT
+#include <libaudit.h>
+#include <sys/select.h>
+#include <errno.h>
+#endif
+
+/* Send audit message */
+static
+
+int send_audit_message(pam_handle_t *pamh, int success, security_context_t default_context,
+		       security_context_t selected_context)
+{
+	int rc=0;
+#ifdef HAVE_LIBAUDIT
+	char *msg = NULL;
+	int audit_fd = audit_open();
+	security_context_t default_raw=NULL;
+	security_context_t selected_raw=NULL;
+	const void *tty = NULL, *rhost = NULL;
+	rc = -1;
+	if (audit_fd < 0) {
+		if (errno == EINVAL || errno == EPROTONOSUPPORT ||
+                                        errno == EAFNOSUPPORT)
+                        return 0; /* No audit support in kernel */
+		pam_syslog(pamh, LOG_ERR, "Error connecting to audit system.");
+		return rc;
+	}
+	(void)pam_get_item(pamh, PAM_TTY, &tty);
+	(void)pam_get_item(pamh, PAM_RHOST, &rhost);
+	if (selinux_trans_to_raw_context(default_context, &default_raw) < 0) {
+		pam_syslog(pamh, LOG_ERR, "Error translating default context.");
+		default_raw = NULL;
+	}
+	if (selinux_trans_to_raw_context(selected_context, &selected_raw) < 0) {
+		pam_syslog(pamh, LOG_ERR, "Error translating selected context.");
+		selected_raw = NULL;
+	}
+	if (asprintf(&msg, "pam: default-context=%s selected-context=%s",
+		     default_raw ? default_raw : (default_context ? default_context : "?"),
+		     selected_raw ? selected_raw : (selected_context ? selected_context : "?")) < 0) {
+		pam_syslog(pamh, LOG_ERR, "Error allocating memory.");
+		goto out;
+	}
+	if (audit_log_user_message(audit_fd, AUDIT_USER_ROLE_CHANGE,
+				   msg, rhost, NULL, tty, success) <= 0) {
+		pam_syslog(pamh, LOG_ERR, "Error sending audit message.");
+		goto out;
+	}
+	rc = 0;
+      out:
+	free(msg);
+	freecon(default_raw);
+	freecon(selected_raw);
+	close(audit_fd);
+#else
+	pam_syslog(pamh, LOG_NOTICE, "pam: default-context=%s selected-context=%s success %d", default_context, selected_context, success);
+#endif
+	return rc;
+}
+static int
+send_text (pam_handle_t *pamh, const char *text, int debug)
+{
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "%s", text);
+  return pam_info (pamh, "%s", text);
+}
+
+/*
+ * This function sends a message to the user and gets the response. The caller
+ * is responsible for freeing the responses.
+ */
+static int
+query_response (pam_handle_t *pamh, const char *text, const char *def,
+		char **response, int debug)
+{
+  int rc;
+  if (def)
+    rc = pam_prompt (pamh, PAM_PROMPT_ECHO_ON, response, "%s [%s] ", text, def);
+  else
+    rc = pam_prompt (pamh, PAM_PROMPT_ECHO_ON, response, "%s ", text);
+
+  if (*response == NULL) {
+    rc = PAM_CONV_ERR;
+  }
+
+  if (rc != PAM_SUCCESS) {
+    pam_syslog(pamh, LOG_WARNING, "No response to query: %s", text);
+  } else  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "%s %s", text, *response);
+  return rc;
+}
+
+static int mls_range_allowed(pam_handle_t *pamh, security_context_t src, security_context_t dst, int debug)
+{
+  struct av_decision avd;
+  int retval;
+  security_class_t class;
+  access_vector_t bit;
+  context_t src_context;
+  context_t dst_context;
+
+  class = string_to_security_class("context");
+  if (!class) {
+    pam_syslog(pamh, LOG_ERR, "Failed to translate security class context. %m");
+    return 0;
+  }
+
+  bit = string_to_av_perm(class, "contains");
+  if (!bit) {
+    pam_syslog(pamh, LOG_ERR, "Failed to translate av perm contains. %m");
+    return 0;
+  }
+
+  src_context = context_new (src);
+  dst_context = context_new (dst);
+  context_range_set(dst_context, context_range_get(src_context));
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Checking if %s mls range valid for  %s", dst, context_str(dst_context));
+
+  retval = security_compute_av(context_str(dst_context), dst, class, bit, &avd);
+  context_free(src_context);
+  context_free(dst_context);
+  if (retval || ((bit & avd.allowed) != bit))
+    return 0;
+
+  return 1;
+}
+
+static security_context_t
+config_context (pam_handle_t *pamh, security_context_t defaultcon, int use_current_range, int debug)
+{
+  security_context_t newcon=NULL;
+  context_t new_context;
+  int mls_enabled = is_selinux_mls_enabled();
+  char *response=NULL;
+  char *type=NULL;
+  char resp_val = 0;
+
+  pam_prompt (pamh, PAM_TEXT_INFO, NULL, _("Default Security Context %s\n"), defaultcon);
+
+  while (1) {
+    if (query_response(pamh,
+		   _("Would you like to enter a different role or level?"), "n",
+		   &response, debug) == PAM_SUCCESS) {
+	resp_val = response[0];
+	_pam_drop(response);
+    } else {
+	resp_val = 'N';
+    }
+    if ((resp_val == 'y') || (resp_val == 'Y'))
+      {
+        if ((new_context = context_new(defaultcon)) == NULL)
+	    goto fail_set;
+
+	/* Allow the user to enter role and level individually */
+	if (query_response(pamh, _("role:"), context_role_get(new_context),
+		       &response, debug) == PAM_SUCCESS && response[0]) {
+	  if (get_default_type(response, &type)) {
+	    pam_prompt (pamh, PAM_ERROR_MSG, NULL, _("No default type for role %s\n"), response);
+	    _pam_drop(response);
+	    continue;
+	  } else {
+	    if (context_role_set(new_context, response))
+	      goto fail_set;
+	    if (context_type_set (new_context, type))
+	      goto fail_set;
+	    _pam_drop(type);
+	  }
+	}
+	_pam_drop(response);
+
+	if (mls_enabled)
+	  {
+	    if (use_current_range) {
+	        security_context_t mycon = NULL;
+	        context_t my_context;
+
+		if (getcon(&mycon) != 0)
+		    goto fail_set;
+		my_context = context_new(mycon);
+	        if (my_context == NULL) {
+		    freecon(mycon);
+		    goto fail_set;
+		}
+		freecon(mycon);
+		if (context_range_set(new_context, context_range_get(my_context))) {
+		    context_free(my_context);
+		    goto fail_set;
+		}
+		context_free(my_context);
+	    } else if (query_response(pamh, _("level:"), context_range_get(new_context),
+			   &response, debug) == PAM_SUCCESS && response[0]) {
+		if (context_range_set(new_context, response))
+		    goto fail_set;
+	    }
+	    _pam_drop(response);
+	  }
+
+	if (debug)
+	  pam_syslog(pamh, LOG_NOTICE, "Selected Security Context %s", context_str(new_context));
+
+        /* Get the string value of the context and see if it is valid. */
+        if (!security_check_context(context_str(new_context))) {
+	  newcon = strdup(context_str(new_context));
+	  if (newcon == NULL)
+	    goto fail_set;
+	  context_free(new_context);
+
+          /* we have to check that this user is allowed to go into the
+             range they have specified ... role is tied to an seuser, so that'll
+             be checked at setexeccon time */
+          if (mls_enabled && !mls_range_allowed(pamh, defaultcon, newcon, debug)) {
+	    pam_syslog(pamh, LOG_NOTICE, "Security context %s is not allowed for %s", defaultcon, newcon);
+
+	    send_audit_message(pamh, 0, defaultcon, newcon);
+
+	    free(newcon);
+            goto fail_range;
+	  }
+	  return newcon;
+	}
+	else {
+	  send_audit_message(pamh, 0, defaultcon, context_str(new_context));
+	  send_text(pamh,_("Not a valid security context"),debug);
+	}
+        context_free(new_context); /* next time around allocates another */
+      }
+    else
+      return strdup(defaultcon);
+  } /* end while */
+
+  return NULL;
+
+ fail_set:
+  free(type);
+  _pam_drop(response);
+  context_free (new_context);
+  send_audit_message(pamh, 0, defaultcon, NULL);
+ fail_range:
+  return NULL;
+}
+
+static security_context_t
+context_from_env (pam_handle_t *pamh, security_context_t defaultcon, int env_params, int use_current_range, int debug)
+{
+  security_context_t newcon = NULL;
+  context_t new_context;
+  context_t my_context = NULL;
+  int mls_enabled = is_selinux_mls_enabled();
+  const char *env = NULL;
+  char *type = NULL;
+  int fail = 1;
+
+  if ((new_context = context_new(defaultcon)) == NULL)
+    goto fail_set;
+
+  if (env_params && (env = pam_getenv(pamh, "SELINUX_ROLE_REQUESTED")) != NULL && env[0] != '\0') {
+    if (debug)
+	pam_syslog(pamh, LOG_NOTICE, "Requested role: %s", env);
+
+    if (get_default_type(env, &type)) {
+	pam_syslog(pamh, LOG_NOTICE, "No default type for role %s", env);
+	goto fail_set;
+    } else {
+	if (context_role_set(new_context, env))
+	    goto fail_set;
+	if (context_type_set(new_context, type))
+	    goto fail_set;
+    }
+  }
+
+  if (mls_enabled) {
+    if ((env = pam_getenv(pamh, "SELINUX_USE_CURRENT_RANGE")) != NULL && env[0] == '1') {
+        if (debug)
+	    pam_syslog(pamh, LOG_NOTICE, "SELINUX_USE_CURRENT_RANGE is set");
+	use_current_range = 1;
+    }
+
+    if (use_current_range) {
+        security_context_t mycon = NULL;
+
+	if (getcon(&mycon) != 0)
+	    goto fail_set;
+        my_context = context_new(mycon);
+        if (my_context == NULL) {
+            freecon(mycon);
+	    goto fail_set;
+	}
+	freecon(mycon);
+	env = context_range_get(my_context);
+    } else {
+        env = pam_getenv(pamh, "SELINUX_LEVEL_REQUESTED");
+    }
+
+    if (env != NULL && env[0] != '\0') {
+        if (debug)
+	    pam_syslog(pamh, LOG_NOTICE, "Requested level: %s", env);
+	if (context_range_set(new_context, env))
+	    goto fail_set;
+    }
+  }
+
+  newcon = strdup(context_str(new_context));
+  if (newcon == NULL)
+    goto fail_set;
+
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Selected Security Context %s", newcon);
+
+  /* Get the string value of the context and see if it is valid. */
+  if (security_check_context(newcon)) {
+    pam_syslog(pamh, LOG_NOTICE, "Not a valid security context %s", newcon);
+
+    goto fail_set;
+  }
+
+  /* we have to check that this user is allowed to go into the
+     range they have specified ... role is tied to an seuser, so that'll
+     be checked at setexeccon time */
+  if (mls_enabled && !mls_range_allowed(pamh, defaultcon, newcon, debug)) {
+    pam_syslog(pamh, LOG_NOTICE, "Security context %s is not allowed for %s", defaultcon, newcon);
+
+    goto fail_set;
+  }
+
+  fail = 0;
+
+ fail_set:
+  free(type);
+  context_free(my_context);
+  context_free(new_context);
+  if (fail) {
+    send_audit_message(pamh, 0, defaultcon, newcon);
+    freecon(newcon);
+    newcon = NULL;
+  }
+  return newcon;
+}
+
+#define DATANAME "pam_selinux_context"
+typedef struct {
+  security_context_t exec_context;
+  security_context_t prev_exec_context;
+  security_context_t default_user_context;
+  security_context_t tty_context;
+  security_context_t prev_tty_context;
+  char *tty_path;
+} module_data_t;
+
+static void
+free_module_data(module_data_t *data)
+{
+  free(data->tty_path);
+  freecon(data->prev_tty_context);
+  freecon(data->tty_context);
+  freecon(data->default_user_context);
+  freecon(data->prev_exec_context);
+  if (data->exec_context != data->default_user_context)
+    freecon(data->exec_context);
+  memset(data, 0, sizeof(*data));
+  free(data);
+}
+
+static void
+cleanup(pam_handle_t *pamh UNUSED, void *data, int err UNUSED)
+{
+  free_module_data(data);
+}
+
+static const module_data_t *
+get_module_data(const pam_handle_t *pamh)
+{
+  const void *data;
+
+  return (pam_get_data(pamh, DATANAME, &data) == PAM_SUCCESS) ? data : NULL;
+}
+
+static const char *
+get_item(const pam_handle_t *pamh, int item_type)
+{
+  const void *item;
+
+  return (pam_get_item(pamh, item_type, &item) == PAM_SUCCESS) ? item : NULL;
+}
+
+static int
+set_exec_context(const pam_handle_t *pamh, security_context_t context)
+{
+  if (setexeccon(context) == 0)
+    return 0;
+  pam_syslog(pamh, LOG_ERR, "Setting executable context \"%s\" failed: %m",
+	     context ? context : "");
+  return -1;
+}
+
+static int
+set_file_context(const pam_handle_t *pamh, security_context_t context,
+		 const char *file)
+{
+  if (!file)
+    return 0;
+  if (setfilecon(file, context) == 0 || errno == ENOENT)
+    return 0;
+  pam_syslog(pamh, LOG_ERR, "Setting file context \"%s\" failed for %s: %m",
+	     context ? context : "", file);
+  return -1;
+}
+
+static int
+compute_exec_context(pam_handle_t *pamh, module_data_t *data,
+		     int select_context, int use_current_range,
+		     int env_params, int debug)
+{
+  const char *username;
+
+#ifdef HAVE_GETSEUSER
+  const char *service;
+#endif
+  char *seuser = NULL;
+  char *level = NULL;
+  security_context_t *contextlist = NULL;
+  int num_contexts = 0;
+  const struct passwd *pwd;
+
+  if (!(username = get_item(pamh, PAM_USER))) {
+    pam_syslog(pamh, LOG_ERR, "Cannot obtain the user name");
+    return PAM_USER_UNKNOWN;
+  }
+
+  if ((pwd = pam_modutil_getpwnam(pamh, username)) != NULL) {
+    username = pwd->pw_name;
+  } /* ignore error and keep using original username */
+
+  /* compute execute context */
+#ifdef HAVE_GETSEUSER
+  if (!(service = get_item(pamh, PAM_SERVICE))) {
+    pam_syslog(pamh, LOG_ERR, "Cannot obtain the service name");
+    return PAM_SESSION_ERR;
+  }
+  if (getseuser(username, service, &seuser, &level) == 0) {
+#else
+  if (getseuserbyname(username, &seuser, &level) == 0) {
+#endif
+    num_contexts = get_ordered_context_list_with_level(seuser, level, NULL,
+						       &contextlist);
+    if (debug)
+      pam_syslog(pamh, LOG_DEBUG, "Username= %s SELinux User= %s Level= %s",
+		 username, seuser, level);
+    free(level);
+  }
+  if (num_contexts > 0) {
+    free(seuser);
+    data->default_user_context = strdup(contextlist[0]);
+    freeconary(contextlist);
+    if (!data->default_user_context) {
+      pam_syslog(pamh, LOG_CRIT, "Out of memory");
+      return PAM_BUF_ERR;
+    }
+
+    data->exec_context = data->default_user_context;
+    if (select_context)
+      data->exec_context = config_context(pamh, data->default_user_context,
+					  use_current_range, debug);
+    else if (env_params || use_current_range)
+      data->exec_context = context_from_env(pamh, data->default_user_context,
+					    env_params, use_current_range,
+					    debug);
+  }
+
+  if (!data->exec_context) {
+    pam_syslog(pamh, LOG_ERR, "Unable to get valid context for %s", username);
+    pam_prompt(pamh, PAM_ERROR_MSG, NULL,
+	       _("Unable to get valid context for %s"), username);
+  }
+
+  if (getexeccon(&data->prev_exec_context) < 0)
+    data->prev_exec_context = NULL;
+
+  return PAM_SUCCESS;
+}
+
+static int
+compute_tty_context(const pam_handle_t *pamh, module_data_t *data)
+{
+  const char *tty = get_item(pamh, PAM_TTY);
+
+  if (!tty || !*tty || !strcmp(tty, "ssh") || !strncmp(tty, "NODEV", 5)) {
+    tty = ttyname(STDIN_FILENO);
+    if (!tty || !*tty)
+      tty = ttyname(STDOUT_FILENO);
+    if (!tty || !*tty)
+      tty = ttyname(STDERR_FILENO);
+    if (!tty || !*tty)
+      return PAM_SUCCESS;
+  }
+
+  if (strncmp("/dev/", tty, 5)) {
+    if (asprintf(&data->tty_path, "%s%s", "/dev/", tty) < 0)
+      data->tty_path = NULL;
+  } else {
+    data->tty_path = strdup(tty);
+  }
+
+  if (!data->tty_path) {
+    pam_syslog(pamh, LOG_CRIT, "Out of memory");
+    return PAM_BUF_ERR;
+  }
+
+  if (getfilecon(data->tty_path, &data->prev_tty_context) < 0) {
+    data->prev_tty_context = NULL;
+    if (errno == ENOENT) {
+      free(data->tty_path);
+      data->tty_path = NULL;
+      return PAM_SUCCESS;
+    }
+    pam_syslog(pamh, LOG_ERR, "Failed to get current context for %s: %m",
+	       data->tty_path);
+    return (security_getenforce() == 1) ? PAM_SESSION_ERR : PAM_SUCCESS;
+  }
+
+  if (security_compute_relabel(data->exec_context, data->prev_tty_context,
+			       SECCLASS_CHR_FILE, &data->tty_context)) {
+    data->tty_context = NULL;
+    pam_syslog(pamh, LOG_ERR, "Failed to compute new context for %s: %m",
+	       data->tty_path);
+    freecon(data->prev_tty_context);
+    data->prev_tty_context = NULL;
+    free(data->tty_path);
+    data->tty_path = NULL;
+    return (security_getenforce() == 1) ? PAM_SESSION_ERR : PAM_SUCCESS;
+  }
+
+  return PAM_SUCCESS;
+}
+
+static int
+restore_context(const pam_handle_t *pamh, const module_data_t *data, int debug)
+{
+  int err;
+
+  if (!data) {
+    if (debug)
+      pam_syslog(pamh, LOG_NOTICE, "No context to restore");
+    return PAM_SUCCESS;
+  }
+
+  if (debug && data->tty_path)
+    pam_syslog(pamh, LOG_NOTICE,
+	       "Restore file context of tty %s: [%s] -> [%s]",
+	       data->tty_path,
+	       data->tty_context ? data->tty_context : "",
+	       data->prev_tty_context ? data->prev_tty_context : "");
+  err = set_file_context(pamh, data->prev_tty_context, data->tty_path);
+
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Restore executable context: [%s] -> [%s]",
+	       data->exec_context,
+	       data->prev_exec_context ? data->prev_exec_context : "");
+  err |= set_exec_context(pamh, data->prev_exec_context);
+
+  if (err && security_getenforce() == 1)
+    return PAM_SESSION_ERR;
+
+  return PAM_SUCCESS;
+}
+
+static int
+set_context(pam_handle_t *pamh, const module_data_t *data,
+	    int debug, int verbose)
+{
+  int rc, err;
+
+  if (debug && data->tty_path)
+    pam_syslog(pamh, LOG_NOTICE, "Set file context of tty %s: [%s] -> [%s]",
+	       data->tty_path,
+	       data->prev_tty_context ? data->prev_tty_context : "",
+	       data->tty_context ? data->tty_context : "");
+  err = set_file_context(pamh, data->tty_context, data->tty_path);
+
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Set executable context: [%s] -> [%s]",
+	       data->prev_exec_context ? data->prev_exec_context : "",
+	       data->exec_context);
+  rc = set_exec_context(pamh, data->exec_context);
+  err |= rc;
+
+  send_audit_message(pamh, !rc, data->default_user_context, data->exec_context);
+  if (verbose && !rc) {
+    char msg[PATH_MAX];
+
+    snprintf(msg, sizeof(msg),
+	     _("Security Context %s Assigned"), data->exec_context);
+    send_text(pamh, msg, debug);
+  }
+#ifdef HAVE_SETKEYCREATECON
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Set key creation context to %s",
+	       data->exec_context ? data->exec_context : "");
+  rc = setkeycreatecon(data->exec_context);
+  err |= rc;
+  if (rc)
+    pam_syslog(pamh, LOG_ERR, "Setting key creation context %s failed: %m",
+	       data->exec_context ? data->exec_context : "");
+  if (verbose && !rc) {
+    char msg[PATH_MAX];
+
+    snprintf(msg, sizeof(msg),
+	     _("Key Creation Context %s Assigned"), data->exec_context);
+    send_text(pamh, msg, debug);
+  }
+#endif
+
+  if (err && security_getenforce() == 1)
+    return PAM_SESSION_ERR;
+
+  return PAM_SUCCESS;
+}
+
+static int
+create_context(pam_handle_t *pamh, int argc, const char **argv,
+	       int debug, int verbose)
+{
+  int i;
+  int ttys = 1;
+  int select_context = 0;
+  int use_current_range = 0;
+  int env_params = 0;
+  module_data_t *data;
+
+  /* Parse arguments. */
+  for (i = 0; i < argc; i++) {
+    if (strcmp(argv[i], "nottys") == 0) {
+      ttys = 0;
+    }
+    if (strcmp(argv[i], "select_context") == 0) {
+      select_context = 1;
+    }
+    if (strcmp(argv[i], "use_current_range") == 0) {
+      use_current_range = 1;
+    }
+    if (strcmp(argv[i], "env_params") == 0) {
+      env_params = 1;
+    }
+  }
+
+  if (is_selinux_enabled() <= 0) {
+    if (debug)
+      pam_syslog(pamh, LOG_NOTICE, "SELinux is not enabled");
+    return PAM_SUCCESS;
+  }
+
+  if (select_context && env_params) {
+    pam_syslog(pamh, LOG_ERR,
+	       "select_context cannot be used with env_params");
+    select_context = 0;
+  }
+
+  if (!(data = calloc(1, sizeof(*data)))) {
+    pam_syslog(pamh, LOG_CRIT, "Out of memory");
+    return PAM_BUF_ERR;
+  }
+
+  i = compute_exec_context(pamh, data, select_context, use_current_range,
+			   env_params, debug);
+  if (i != PAM_SUCCESS) {
+    free_module_data(data);
+    return i;
+  }
+
+  if (!data->exec_context) {
+    free_module_data(data);
+    return (security_getenforce() == 1) ? PAM_SESSION_ERR : PAM_SUCCESS;
+  }
+
+  if (ttys && (i = compute_tty_context(pamh, data)) != PAM_SUCCESS) {
+    free_module_data(data);
+    return i;
+  }
+
+  if ((i = pam_set_data(pamh, DATANAME, data, cleanup)) != PAM_SUCCESS) {
+    pam_syslog(pamh, LOG_ERR, "Error saving context: %m");
+    free_module_data(data);
+    return i;
+  }
+
+  return set_context(pamh, data, debug, verbose);
+}
+
+int
+pam_sm_authenticate(pam_handle_t *pamh UNUSED, int flags UNUSED,
+		    int argc UNUSED, const char **argv UNUSED)
+{
+  /* Fail by default. */
+  return PAM_AUTH_ERR;
+}
+
+int
+pam_sm_setcred(pam_handle_t *pamh UNUSED, int flags UNUSED,
+	       int argc UNUSED, const char **argv UNUSED)
+{
+  return PAM_SUCCESS;
+}
+
+int
+pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
+		    int argc, const char **argv)
+{
+  const module_data_t *data;
+  int i, debug = 0, verbose = 0, close_session = 0, restore = 0;
+
+  /* Parse arguments. */
+  for (i = 0; i < argc; i++) {
+    if (strcmp(argv[i], "debug") == 0) {
+      debug = 1;
+    }
+    if (strcmp(argv[i], "verbose") == 0) {
+      verbose = 1;
+    }
+    if (strcmp(argv[i], "close") == 0) {
+      close_session = 1;
+    }
+    if (strcmp(argv[i], "restore") == 0) {
+      restore = 1;
+    }
+  }
+
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Open Session");
+
+  /* Is this module supposed to execute close_session only? */
+  if (close_session)
+    return PAM_SUCCESS;
+
+  data = get_module_data(pamh);
+
+  /* Is this module supposed only to restore original context? */
+  if (restore)
+    return restore_context(pamh, data, debug);
+
+  /* If there is a saved context, this module is supposed to set it again. */
+  return data ? set_context(pamh, data, debug, verbose) :
+    create_context(pamh, argc, argv, debug, verbose);
+}
+
+int
+pam_sm_close_session(pam_handle_t *pamh, int flags UNUSED,
+		     int argc, const char **argv)
+{
+  int i, debug = 0, open_session = 0;
+
+  /* Parse arguments. */
+  for (i = 0; i < argc; i++) {
+    if (strcmp(argv[i], "debug") == 0) {
+      debug = 1;
+    }
+    if (strcmp(argv[i], "open") == 0) {
+      open_session = 1;
+    }
+  }
+
+  if (debug)
+    pam_syslog(pamh, LOG_NOTICE, "Close Session");
+
+  /* Is this module supposed to execute open_session only? */
+  if (open_session)
+    return PAM_SUCCESS;
+
+  /* Restore original context. */
+  return restore_context(pamh, get_module_data(pamh), debug);
+}
diff --git a/modules/pam_selinux/pam_selinux_check.8 b/modules/pam_selinux/pam_selinux_check.8
new file mode 100644
index 0000000..34f578d
--- /dev/null
+++ b/modules/pam_selinux/pam_selinux_check.8
@@ -0,0 +1,35 @@
+.TH pam_selinux_check 8 2002/05/23 "Red Hat Linux" "System Administrator's Manual"
+.SH NAME
+pam_selinux_check \- login program to test pam_selinux.so
+.SH SYNOPSIS
+.B pam_selinux_check [user]
+.br
+
+.SH DESCRIPTION
+With no arguments,
+.B pam_selinux_check
+will prompt for user
+
+.SH OPTIONS
+.IP target_user
+The user to login as.
+
+.SH DIAGNOSTICS
+You must setup a /etc/pam.d/pam_selinux_check file, in order for the check to work.
+
+When checking if a selinux is valid,
+.B pam_selinux_check
+returns an exit code of 0 for success and > 0 on error:
+
+.nf
+1: Authentication failure
+.fi
+
+.SH SEE ALSO
+pam_selinux(8)
+
+.SH BUGS
+Let's hope not, but if you find any, please email the author.
+
+.SH AUTHOR
+Dan Walsh <dwalsh@redhat.com>
diff --git a/modules/pam_selinux/pam_selinux_check.c b/modules/pam_selinux/pam_selinux_check.c
new file mode 100644
index 0000000..30526d3
--- /dev/null
+++ b/modules/pam_selinux/pam_selinux_check.c
@@ -0,0 +1,161 @@
+/******************************************************************************
+ * A module for Linux-PAM that will set the default security context after login
+ * via PAM.
+ *
+ * Copyright (c) 2003 Red Hat, Inc.
+ * Written by Dan Walsh <dwalsh@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, and the entire permission notice in its entirety,
+ *    including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/************************************************************************
+ *
+ * All PAM code goes in this section.
+ *
+ ************************************************************************/
+
+#include "config.h"
+
+#include <errno.h>
+#include <syslog.h>
+#include <unistd.h>               /* for getuid(), exit(), getopt() */
+#include <signal.h>
+#include <sys/wait.h>		  /* for wait() */
+
+#include <security/pam_appl.h>    /* for PAM functions */
+#include <security/pam_misc.h>    /* for misc_conv PAM utility function */
+
+#define SERVICE_NAME "pam_selinux_check"   /* the name of this program for PAM */
+				  /* The file containing the context to run
+				   * the scripts under.                     */
+int authenticate_via_pam( const char *user ,   pam_handle_t **pamh);
+
+/* authenticate_via_pam()
+ *
+ * in:     user
+ * out:    nothing
+ * return: value   condition
+ *         -----   ---------
+ *           1     pam thinks that the user authenticated themselves properly
+ *           0     otherwise
+ *
+ * this function uses pam to authenticate the user running this
+ * program.  this is the only function in this program that makes pam
+ * calls.
+ *
+ */
+
+int authenticate_via_pam( const char *user ,   pam_handle_t **pamh) {
+
+  struct pam_conv *conv;
+  int result = 0;    /* our result, set to 0 (not authenticated) by default */
+
+  /* this is a jump table of functions for pam to use when it wants to *
+   * communicate with the user.  we'll be using misc_conv(), which is  *
+   * provided for us via pam_misc.h.                                   */
+  struct pam_conv pam_conversation = {
+    misc_conv,
+    NULL
+  };
+  conv = &pam_conversation;
+
+
+  /* make `p_pam_handle' a valid pam handle so we can use it when *
+   * calling pam functions.                                       */
+  if( PAM_SUCCESS != pam_start( SERVICE_NAME,
+				user,
+				conv,
+				pamh ) ) {
+    fprintf( stderr, _("failed to initialize PAM\n") );
+    exit( -1 );
+  }
+
+  if( PAM_SUCCESS != pam_set_item(*pamh, PAM_RUSER, user))
+  {
+      fprintf( stderr, _("failed to pam_set_item()\n") );
+      exit( -1 );
+  }
+
+  /* Ask PAM to authenticate the user running this program */
+  if( PAM_SUCCESS == pam_authenticate(*pamh,0) ) {
+    if ( PAM_SUCCESS == pam_open_session(*pamh, 0) )
+      result = 1;  /* user authenticated OK! */
+  }
+  return( result );
+
+} /* authenticate_via_pam() */
+
+int
+main (int argc, char **argv)
+{
+  pam_handle_t *pamh;
+  int childPid;
+
+  if (argc < 1)
+    exit (-1);
+
+  if (!authenticate_via_pam(argv[1],&pamh))
+    exit(-1);
+
+  childPid = fork();
+  if (childPid < 0) {
+    /* error in fork() */
+    fprintf(stderr, _("login: failure forking: %m"));
+    pam_close_session(pamh, 0);
+    /* We're done with PAM.  Free `pam_handle'. */
+    pam_end( pamh, PAM_SUCCESS );
+    exit(0);
+  }
+  if (childPid) {
+    close(0); close(1); close(2);
+    struct sigaction sa;
+    memset(&sa,0,sizeof(sa));
+    sa.sa_handler = SIG_IGN;
+    sigaction(SIGQUIT, &sa, NULL);
+    sigaction(SIGINT, &sa, NULL);
+    while(wait(NULL) == -1 && errno == EINTR) /**/ ;
+    openlog("login", LOG_ODELAY, LOG_AUTHPRIV);
+    pam_close_session(pamh, 0);
+    /* We're done with PAM.  Free `pam_handle'. */
+    pam_end( pamh, PAM_SUCCESS );
+    exit(0);
+  }
+  argv[0]=strdup ("/bin/sh");
+  argv[1]=NULL;
+
+  /* NOTE: The environment has not been sanitized. LD_PRELOAD and other fun
+   * things could be set. */
+  execv("/bin/sh",argv);
+  fprintf(stderr,"Failure\n");
+  return 0;
+}
diff --git a/modules/pam_selinux/tst-pam_selinux b/modules/pam_selinux/tst-pam_selinux
new file mode 100755
index 0000000..14c3d82
--- /dev/null
+++ b/modules/pam_selinux/tst-pam_selinux
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_selinux.so
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-05-06 01:38:36 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-05-06 01:38:36 +0000
commit	26367bfc399cb3862f94ddca8fce87f98f26d67e (patch)
tree	ba3a4e02ed5ec62fe645dfa810c01d26decf591f /modules/pam_selinux
parent	Initial commit. (diff)
download	pam-upstream/1.3.1.tar.xz pam-upstream/1.3.1.zip