4 files changed, 1113 insertions, 10 deletions
diff --git a/modules/pam_xauth/.cvsignore b/modules/pam_xauth/.cvsignore
deleted file mode 100644
index 1611e414..00000000
--- a/modules/pam_xauth/.cvsignore
+++ /dev/null
@@ -1,10 +0,0 @@
-*.la
-*.lo
-*.so
-*~
-.deps
-.libs
-Makefile
-Makefile.in
-README
-pam_xauth.8
diff --git a/modules/pam_xauth/Makefile.in b/modules/pam_xauth/Makefile.in
new file mode 100644
index 00000000..d8e56b0b
--- /dev/null
+++ b/modules/pam_xauth/Makefile.in
@@ -0,0 +1,684 @@
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+	      ;; \
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+		echo "PASS: $$tst"; \
+	      ;; \
+	      esac; \
+	    elif test $$? -ne 77; then \
+	      all=`expr $$all + 1`; \
+	      case " $(XFAIL_TESTS) " in \
+	      *[\ \	]$$tst[\ \	]*) \
+		xfail=`expr $$xfail + 1`; \
+		echo "XFAIL: $$tst"; \
+	      ;; \
+	      *) \
+		failed=`expr $$failed + 1`; \
+		echo "FAIL: $$tst"; \
+	      ;; \
+	      esac; \
+	    else \
+	      skip=`expr $$skip + 1`; \
+	      echo "SKIP: $$tst"; \
+	    fi; \
+	  done; \
+	  if test "$$all" -eq 1; then \
+	    tests="test"; \
+	    All=""; \
+	  else \
+	    tests="tests"; \
+	    All="All "; \
+	  fi; \
+	  if test "$$failed" -eq 0; then \
+	    if test "$$xfail" -eq 0; then \
+	      banner="$$All$$all $$tests passed"; \
+	    else \
+	      if test "$$xfail" -eq 1; then failures=failure; else failures=failures; fi; \
+	      banner="$$All$$all $$tests behaved as expected ($$xfail expected $$failures)"; \
+	    fi; \
+	  else \
+	    if test "$$xpass" -eq 0; then \
+	      banner="$$failed of $$all $$tests failed"; \
+	    else \
+	      if test "$$xpass" -eq 1; then passes=pass; else passes=passes; fi; \
+	      banner="$$failed of $$all $$tests did not behave as expected ($$xpass unexpected $$passes)"; \
+	    fi; \
+	  fi; \
+	  dashes="$$banner"; \
+	  skipped=""; \
+	  if test "$$skip" -ne 0; then \
+	    if test "$$skip" -eq 1; then \
+	      skipped="($$skip test was not run)"; \
+	    else \
+	      skipped="($$skip tests were not run)"; \
+	    fi; \
+	    test `echo "$$skipped" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$skipped"; \
+	  fi; \
+	  report=""; \
+	  if test "$$failed" -ne 0 && test -n "$(PACKAGE_BUGREPORT)"; then \
+	    report="Please report to $(PACKAGE_BUGREPORT)"; \
+	    test `echo "$$report" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$report"; \
+	  fi; \
+	  dashes=`echo "$$dashes" | sed s/./=/g`; \
+	  echo "$$dashes"; \
+	  echo "$$banner"; \
+	  test -z "$$skipped" || echo "$$skipped"; \
+	  test -z "$$report" || echo "$$report"; \
+	  echo "$$dashes"; \
+	  test "$$failed" -eq 0; \
+	else :; fi
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -pR $(srcdir)/$$file $(distdir)$$dir || exit 1; \
+	    fi; \
+	    cp -pR $$d/$$file $(distdir)$$dir || exit 1; \
+	  else \
+	    test -f $(distdir)/$$file \
+	    || cp -p $$d/$$file $(distdir)/$$file \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(MANS) $(DATA)
+installdirs:
+	for dir in "$(DESTDIR)$(securelibdir)" "$(DESTDIR)$(man8dir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-securelibLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
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+
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+install-ps: install-ps-am
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
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+mostlyclean: mostlyclean-am
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+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
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+uninstall-man: uninstall-man8
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+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-TESTS check-am clean \
+	clean-generic clean-libtool clean-securelibLTLIBRARIES ctags \
+	distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-man8 install-pdf \
+	install-pdf-am install-ps install-ps-am \
+	install-securelibLTLIBRARIES install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags uninstall uninstall-am uninstall-man uninstall-man8 \
+	uninstall-securelibLTLIBRARIES
+
+@ENABLE_REGENERATE_MAN_TRUE@README: pam_xauth.8.xml
+@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/modules/pam_xauth/README b/modules/pam_xauth/README
new file mode 100644
index 00000000..a32822d2
--- /dev/null
+++ b/modules/pam_xauth/README
@@ -0,0 +1,90 @@
+pam_xauth — PAM module to forward xauth keys between users
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+The pam_xauth PAM module is designed to forward xauth keys (sometimes referred
+to as "cookies") between users.
+
+Without pam_xauth, when xauth is enabled and a user uses the su(1) command to
+assume another user's privileges, that user is no longer able to access the
+original user's X display because the new user does not have the key needed to
+access the display. pam_xauth solves the problem by forwarding the key from the
+user running su (the source user) to the user whose identity the source user is
+assuming (the target user) when the session is created, and destroying the key
+when the session is torn down.
+
+This means, for example, that when you run su(1) from an xterm session, you
+will be able to run X programs without explicitly dealing with the xauth(1)
+xauth command or ~/.Xauthority files.
+
+pam_xauth will only forward keys if xauth can list a key connected to the
+$DISPLAY environment variable.
+
+Primitive access control is provided by ~/.xauth/export in the invoking user's
+home directory and ~/.xauth/import in the target user's home directory.
+
+If a user has a ~/.xauth/import file, the user will only receive cookies from
+users listed in the file. If there is no ~/.xauth/import file, the user will
+accept cookies from any other user.
+
+If a user has a .xauth/export file, the user will only forward cookies to users
+listed in the file. If there is no ~/.xauth/export file, and the invoking user
+is not root, the user will forward cookies to any other user. If there is no ~
+/.xauth/export file, and the invoking user is root, the user will not forward
+cookies to other users.
+
+Both the import and export files support wildcards (such as *). Both the import
+and export files can be empty, signifying that no users are allowed.
+
+OPTIONS
+
+debug
+
+    Print debug information.
+
+xauthpath=/path/to/xauth
+
+    Specify the path the xauth program (it is expected in /usr/X11R6/bin/xauth,
+    /usr/bin/xauth, or /usr/bin/X11/xauth by default).
+
+systemuser=UID
+
+    Specify the highest UID which will be assumed to belong to a "system" user.
+    pam_xauth will refuse to forward credentials to users with UID less than or
+    equal to this number, except for root and the "targetuser", if specified.
+
+targetuser=UID
+
+    Specify a single target UID which is exempt from the systemuser check.
+
+EXAMPLES
+
+Add the following line to /etc/pam.d/su to forward xauth keys between users
+when calling su:
+
+session  optional  pam_xauth.so
+
+
+IMPLEMENTATION DETAILS
+
+pam_xauth will work only if it is used from a setuid application in which the
+getuid() call returns the id of the user running the application, and for which
+PAM can supply the name of the account that the user is attempting to assume.
+The typical application of this type is su(1). The application must call both
+pam_open_session() and pam_close_session() with the ruid set to the uid of the
+calling user and the euid set to root, and must have provided as the PAM_USER
+item the name of the target user.
+
+pam_xauth calls xauth(1) as the source user to extract the key for $DISPLAY,
+then calls xauth as the target user to merge the key into the a temporary
+database and later remove the database.
+
+pam_xauth cannot be told to not remove the keys when the session is closed.
+
+AUTHOR
+
+pam_xauth was written by Nalin Dahyabhai <nalin@redhat.com>, based on original
+version by Michael K. Johnson <johnsonm@redhat.com>.
+
diff --git a/modules/pam_xauth/pam_xauth.8 b/modules/pam_xauth/pam_xauth.8
new file mode 100644
index 00000000..efccae3d
--- /dev/null
+++ b/modules/pam_xauth/pam_xauth.8
@@ -0,0 +1,339 @@
+.\"     Title: pam_xauth
+.\"    Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
+.\"      Date: 06/16/2009
+.\"    Manual: Linux-PAM Manual
+.\"    Source: Linux-PAM Manual
+.\"  Language: English
+.\"
+.TH "PAM_XAUTH" "8" "06/16/2009" "Linux-PAM Manual" "Linux\-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * (re)Define some macros
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" toupper - uppercase a string (locale-aware)
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.de toupper
+.tr aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ
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+..
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+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.\}
+.toupper \\$*
+.el \{\
+\\$*
+.\}
+..
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+.\" if n (TTY output), use uppercase
+.toupper \\$*
+.\}
+.el \{\
+.nr an-break-flag 0
+.\" if not n (not TTY), use normal case (not uppercase)
+\\$1
+.in \\n[an-margin]u
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+.\" if not n (not TTY), put a border/line under subheading
+.sp -.6
+\l'\n(.lu'
+.\}
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" SS - level-two heading that works better for non-TTY output
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.in \\n[IN]u
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+.it 1 an-trap
+.nr an-no-space-flag 1
+.nr an-break-flag 1
+.ps \\n[PS-SS]u
+\." make the size of the head bigger
+.ps +2
+.ft B
+.ne (2v + 1u)
+.if \\n[.$] \&\\$*
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" BB/BE - put background/screen (filled box) around block of text
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.de BB
+.if t \{\
+.sp -.5
+.br
+.in +2n
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+.di BX
+.\}
+..
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+.\}
+.el \{\
+\M[\\$1]\h'1n'\v'-.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[]
+.\}
+.in 0
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+.in
+.sp .5v
+.fi
+.\}
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" BM/EM - put colored marker in margin next to block of text
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.in 0
+.nf
+.BX
+.in
+.fi
+.\}
+..
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "Name"
+pam_xauth \- PAM module to forward xauth keys between users
+.SH "Synopsis"
+.fam C
+.HP \w'\fBpam_xauth\&.so\fR\ 'u
+\fBpam_xauth\&.so\fR [debug] [xauthpath=\fI/path/to/xauth\fR] [systemuser=\fIUID\fR] [targetuser=\fIUID\fR]
+.fam
+.SH "DESCRIPTION"
+.PP
+The pam_xauth PAM module is designed to forward xauth keys (sometimes referred to as "cookies") between users\&.
+.PP
+Without pam_xauth, when xauth is enabled and a user uses the
+\fBsu\fR(1)
+command to assume another user\'s privileges, that user is no longer able to access the original user\'s X display because the new user does not have the key needed to access the display\&. pam_xauth solves the problem by forwarding the key from the user running su (the source user) to the user whose identity the source user is assuming (the target user) when the session is created, and destroying the key when the session is torn down\&.
+.PP
+This means, for example, that when you run
+\fBsu\fR(1)
+from an xterm session, you will be able to run X programs without explicitly dealing with the
+\fBxauth\fR(1)
+xauth command or ~/\&.Xauthority files\&.
+.PP
+pam_xauth will only forward keys if xauth can list a key connected to the $DISPLAY environment variable\&.
+.PP
+Primitive access control is provided by
+\FC~/\&.xauth/export\F[]
+in the invoking user\'s home directory and
+\FC~/\&.xauth/import\F[]
+in the target user\'s home directory\&.
+.PP
+If a user has a
+\FC~/\&.xauth/import\F[]
+file, the user will only receive cookies from users listed in the file\&. If there is no
+\FC~/\&.xauth/import\F[]
+file, the user will accept cookies from any other user\&.
+.PP
+If a user has a
+\FC\&.xauth/export\F[]
+file, the user will only forward cookies to users listed in the file\&. If there is no
+\FC~/\&.xauth/export\F[]
+file, and the invoking user is not
+\fBroot\fR, the user will forward cookies to any other user\&. If there is no
+\FC~/\&.xauth/export\F[]
+file, and the invoking user is
+\fBroot\fR, the user will
+\fInot\fR
+forward cookies to other users\&.
+.PP
+Both the import and export files support wildcards (such as
+\fI*\fR)\&. Both the import and export files can be empty, signifying that no users are allowed\&.
+.SH "OPTIONS"
+.PP
+\fBdebug\fR
+.RS 4
+Print debug information\&.
+.RE
+.PP
+\fBxauthpath=\fR\fB\fI/path/to/xauth\fR\fR
+.RS 4
+Specify the path the xauth program (it is expected in
+\FC/usr/X11R6/bin/xauth\F[],
+\FC/usr/bin/xauth\F[], or
+\FC/usr/bin/X11/xauth\F[]
+by default)\&.
+.RE
+.PP
+\fBsystemuser=\fR\fB\fIUID\fR\fR
+.RS 4
+Specify the highest UID which will be assumed to belong to a "system" user\&. pam_xauth will refuse to forward credentials to users with UID less than or equal to this number, except for root and the "targetuser", if specified\&.
+.RE
+.PP
+\fBtargetuser=\fR\fB\fIUID\fR\fR
+.RS 4
+Specify a single target UID which is exempt from the systemuser check\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+Only the
+\fBsession\fR
+type is provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_PERM_DENIED
+.RS 4
+Permission denied by import/export file\&.
+.RE
+.PP
+PAM_SESSION_ERR
+.RS 4
+Cannot determine user name, UID or access users home directory\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+Success\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+User not known\&.
+.RE
+.SH "EXAMPLES"
+.PP
+Add the following line to
+\FC/etc/pam\&.d/su\F[]
+to forward xauth keys between users when calling su:
+.sp
+.if n \{\
+.RS 4
+.\}
+.fam C
+.ps -1
+.nf
+.if t \{\
+.sp -1
+.\}
+.BB lightgray adjust-for-leading-newline
+.sp -1
+
+session  optional  pam_xauth\&.so
+      
+.EB lightgray adjust-for-leading-newline
+.if t \{\
+.sp 1
+.\}
+.fi
+.fam
+.ps +1
+.if n \{\
+.RE
+.\}
+.sp
+.SH "IMPLEMENTATION DETAILS"
+.PP
+pam_xauth will work
+\fIonly\fR
+if it is used from a setuid application in which the
+\fBgetuid\fR() call returns the id of the user running the application, and for which PAM can supply the name of the account that the user is attempting to assume\&. The typical application of this type is
+\fBsu\fR(1)\&. The application must call both
+\fBpam_open_session\fR() and
+\fBpam_close_session\fR() with the ruid set to the uid of the calling user and the euid set to root, and must have provided as the PAM_USER item the name of the target user\&.
+.PP
+pam_xauth calls
+\fBxauth\fR(1)
+as the source user to extract the key for $DISPLAY, then calls xauth as the target user to merge the key into the a temporary database and later remove the database\&.
+.PP
+pam_xauth cannot be told to not remove the keys when the session is closed\&.
+.SH "FILES"
+.PP
+\FC~/\&.xauth/import\F[]
+.RS 4
+XXX
+.RE
+.PP
+\FC~/\&.xauth/export\F[]
+.RS 4
+XXX
+.RE
+.SH "SEE ALSO"
+.PP
+
+\fBpam.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+.SH "AUTHOR"
+.PP
+pam_xauth was written by Nalin Dahyabhai <nalin@redhat\&.com>, based on original version by Michael K\&. Johnson <johnsonm@redhat\&.com>\&.