Imported Upstream version 5.0.1

6 files changed, 1012 insertions, 0 deletions

diff --git a/src/libcharon/plugins/xauth_pam/Makefile.am b/src/libcharon/plugins/xauth_pam/Makefile.am
new file mode 100644
index 000000000..47521a3ff
--- /dev/null
+++ b/src/libcharon/plugins/xauth_pam/Makefile.am
@@ -0,0 +1,17 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = -rdynamic
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-xauth-pam.la
+else
+plugin_LTLIBRARIES = libstrongswan-xauth-pam.la
+endif
+
+libstrongswan_xauth_pam_la_SOURCES = \
+	xauth_pam_plugin.h xauth_pam_plugin.c \
+	xauth_pam.h xauth_pam.c
+
+libstrongswan_xauth_pam_la_LDFLAGS = -module -avoid-version -lpam
diff --git a/src/libcharon/plugins/xauth_pam/Makefile.in b/src/libcharon/plugins/xauth_pam/Makefile.in
new file mode 100644
index 000000000..c3514473c
--- /dev/null
+++ b/src/libcharon/plugins/xauth_pam/Makefile.in
@@ -0,0 +1,622 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
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+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = src/libcharon/plugins/xauth_pam
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
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+am__aclocal_m4_deps = $(top_srcdir)/m4/config/libtool.m4 \
+	$(top_srcdir)/m4/config/ltoptions.m4 \
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+	$(top_srcdir)/m4/config/ltversion.m4 \
+	$(top_srcdir)/m4/config/lt~obsolete.m4 \
+	$(top_srcdir)/m4/macros/with.m4 \
+	$(top_srcdir)/m4/macros/enable-disable.m4 \
+	$(top_srcdir)/m4/macros/add-plugin.m4 \
+	$(top_srcdir)/configure.in
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+am_libstrongswan_xauth_pam_la_OBJECTS = xauth_pam_plugin.lo \
+	xauth_pam.lo
+libstrongswan_xauth_pam_la_OBJECTS =  \
+	$(am_libstrongswan_xauth_pam_la_OBJECTS)
+libstrongswan_xauth_pam_la_LINK = $(LIBTOOL) --tag=CC \
+	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+	$(AM_CFLAGS) $(CFLAGS) $(libstrongswan_xauth_pam_la_LDFLAGS) \
+	$(LDFLAGS) -o $@
+@MONOLITHIC_FALSE@am_libstrongswan_xauth_pam_la_rpath = -rpath \
+@MONOLITHIC_FALSE@	$(plugindir)
+@MONOLITHIC_TRUE@am_libstrongswan_xauth_pam_la_rpath =
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+soup_LIBS = @soup_LIBS@
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+	-I$(top_srcdir)/src/libcharon
+
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+@MONOLITHIC_TRUE@noinst_LTLIBRARIES = libstrongswan-xauth-pam.la
+@MONOLITHIC_FALSE@plugin_LTLIBRARIES = libstrongswan-xauth-pam.la
+libstrongswan_xauth_pam_la_SOURCES = \
+	xauth_pam_plugin.h xauth_pam_plugin.c \
+	xauth_pam.h xauth_pam.c
+
+libstrongswan_xauth_pam_la_LDFLAGS = -module -avoid-version -lpam
+all: all-am
+
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+	      exit 1;; \
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+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/libcharon/plugins/xauth_pam/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/libcharon/plugins/xauth_pam/Makefile
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+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
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+	@$(NORMAL_INSTALL)
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+	}
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+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(plugindir)/$$f'"; \
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+	done
+
+clean-pluginLTLIBRARIES:
+	-test -z "$(plugin_LTLIBRARIES)" || rm -f $(plugin_LTLIBRARIES)
+	@list='$(plugin_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+libstrongswan-xauth-pam.la: $(libstrongswan_xauth_pam_la_OBJECTS) $(libstrongswan_xauth_pam_la_DEPENDENCIES) 
+	$(libstrongswan_xauth_pam_la_LINK) $(am_libstrongswan_xauth_pam_la_rpath) $(libstrongswan_xauth_pam_la_OBJECTS) $(libstrongswan_xauth_pam_la_LIBADD) $(LIBS)
+
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+
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+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/xauth_pam_plugin.Plo@am__quote@
+
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+	-rm -f *.lo
+
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+	-rm -rf .libs _libs
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+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
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+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
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+	  test -n "$$unique" || unique=$$empty_fix; \
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+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/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,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+	for dir in "$(DESTDIR)$(plugindir)"; do \
+	  test -z "$$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='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	clean-pluginLTLIBRARIES mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-pluginLTLIBRARIES
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-pluginLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libtool clean-noinstLTLIBRARIES clean-pluginLTLIBRARIES \
+	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-pdf install-pdf-am \
+	install-pluginLTLIBRARIES install-ps install-ps-am \
+	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-pluginLTLIBRARIES
+
+
+# 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/src/libcharon/plugins/xauth_pam/xauth_pam.c b/src/libcharon/plugins/xauth_pam/xauth_pam.c
new file mode 100644
index 000000000..98c1a97a4
--- /dev/null
+++ b/src/libcharon/plugins/xauth_pam/xauth_pam.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "xauth_pam.h"
+
+#include <daemon.h>
+#include <library.h>
+
+#include <security/pam_appl.h>
+
+typedef struct private_xauth_pam_t private_xauth_pam_t;
+
+/**
+ * Private data of an xauth_pam_t object.
+ */
+struct private_xauth_pam_t {
+
+	/**
+	 * Public interface.
+	 */
+	xauth_pam_t public;
+
+	/**
+	 * ID of the peer
+	 */
+	identification_t *peer;
+};
+
+METHOD(xauth_method_t, initiate, status_t,
+	private_xauth_pam_t *this, cp_payload_t **out)
+{
+	cp_payload_t *cp;
+
+	cp = cp_payload_create_type(CONFIGURATION_V1, CFG_REQUEST);
+	cp->add_attribute(cp, configuration_attribute_create_chunk(
+				CONFIGURATION_ATTRIBUTE_V1, XAUTH_USER_NAME, chunk_empty));
+	cp->add_attribute(cp, configuration_attribute_create_chunk(
+				CONFIGURATION_ATTRIBUTE_V1, XAUTH_USER_PASSWORD, chunk_empty));
+	*out = cp;
+	return NEED_MORE;
+}
+
+/**
+ * PAM conv callback function
+ */
+static int auth_conv(int num_msg, const struct pam_message **msg,
+					 struct pam_response **resp, char *password)
+{
+	struct pam_response *response;
+
+	if (num_msg != 1)
+	{
+		return PAM_CONV_ERR;
+	}
+	response = malloc(sizeof(struct pam_response));
+	response->resp = strdup(password);
+	response->resp_retcode = 0;
+	*resp = response;
+	return PAM_SUCCESS;
+}
+
+/**
+ * Authenticate a username/password using PAM
+ */
+static bool authenticate(char *service, char *user, char *password)
+{
+	pam_handle_t *pamh = NULL;
+	static struct pam_conv conv;
+	int ret;
+
+	conv.conv = (void*)auth_conv;
+	conv.appdata_ptr = password;
+
+	ret = pam_start(service, user, &conv, &pamh);
+	if (ret != PAM_SUCCESS)
+	{
+		DBG1(DBG_IKE, "XAuth pam_start for '%s' failed: %s",
+			 user, pam_strerror(pamh, ret));
+		return FALSE;
+	}
+	ret = pam_authenticate(pamh, 0);
+	if (ret == PAM_SUCCESS)
+	{
+		ret = pam_acct_mgmt(pamh, 0);
+		if (ret != PAM_SUCCESS)
+		{
+			DBG1(DBG_IKE, "XAuth pam_acct_mgmt for '%s' failed: %s",
+				 user, pam_strerror(pamh, ret));
+		}
+	}
+	else
+	{
+		DBG1(DBG_IKE, "XAuth pam_authenticate for '%s' failed: %s",
+			 user, pam_strerror(pamh, ret));
+	}
+	pam_end(pamh, ret);
+	return ret == PAM_SUCCESS;
+}
+
+/**
+ * Convert configuration attribute content to a null-terminated string
+ */
+static void attr2string(char *buf, size_t len, chunk_t chunk)
+{
+	if (chunk.len && chunk.len < len)
+	{
+		snprintf(buf, len, "%.*s", (int)chunk.len, chunk.ptr);
+	}
+}
+
+METHOD(xauth_method_t, process, status_t,
+	private_xauth_pam_t *this, cp_payload_t *in, cp_payload_t **out)
+{
+	char *service, user[128] = "", pass[128] = "", *pos;
+	configuration_attribute_t *attr;
+	enumerator_t *enumerator;
+	chunk_t chunk;
+
+	enumerator = in->create_attribute_enumerator(in);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		switch (attr->get_type(attr))
+		{
+			case XAUTH_USER_NAME:
+				/* trim to username part if email address given */
+				chunk = attr->get_chunk(attr);
+				pos = memchr(chunk.ptr, '@', chunk.len);
+				if (pos)
+				{
+					chunk.len = (u_char*)pos - chunk.ptr;
+				}
+				attr2string(user, sizeof(user), chunk);
+				break;
+			case XAUTH_USER_PASSWORD:
+				attr2string(pass, sizeof(pass), attr->get_chunk(attr));
+				break;
+			default:
+				break;
+		}
+	}
+	enumerator->destroy(enumerator);
+
+	if (!user[0] || !pass[0])
+	{
+		DBG1(DBG_IKE, "peer did not respond to our XAuth request");
+		return FAILED;
+	}
+
+	this->peer->destroy(this->peer);
+	this->peer = identification_create_from_string(user);
+
+	/* Look for PAM service, with a legacy fallback for the eap-gtc plugin.
+	 * Default to "login". */
+	service = lib->settings->get_str(lib->settings,
+				"%s.plugins.xauth-pam.pam_service",
+					lib->settings->get_str(lib->settings,
+						"%s.plugins.eap-gtc.pam_service",
+						"login", charon->name),
+				charon->name);
+
+	if (authenticate(service, user, pass))
+	{
+		DBG1(DBG_IKE, "PAM authentication of '%s' successful", user);
+		return SUCCESS;
+	}
+	return FAILED;
+}
+
+METHOD(xauth_method_t, get_identity, identification_t*,
+	private_xauth_pam_t *this)
+{
+	return this->peer;
+}
+
+METHOD(xauth_method_t, destroy, void,
+	private_xauth_pam_t *this)
+{
+	this->peer->destroy(this->peer);
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+xauth_pam_t *xauth_pam_create_server(identification_t *server,
+									 identification_t *peer)
+{
+	private_xauth_pam_t *this;
+
+	INIT(this,
+		.public = {
+			.xauth_method = {
+				.initiate = _initiate,
+				.process = _process,
+				.get_identity = _get_identity,
+				.destroy = _destroy,
+			},
+		},
+		.peer = peer->clone(peer),
+	);
+
+	return &this->public;
+}
diff --git a/src/libcharon/plugins/xauth_pam/xauth_pam.h b/src/libcharon/plugins/xauth_pam/xauth_pam.h
new file mode 100644
index 000000000..f2d310c0d
--- /dev/null
+++ b/src/libcharon/plugins/xauth_pam/xauth_pam.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup xauth_pam_i xauth_pam
+ * @{ @ingroup xauth_pam
+ */
+
+#ifndef XAUTH_PAM_H_
+#define XAUTH_PAM_H_
+
+typedef struct xauth_pam_t xauth_pam_t;
+
+#include <sa/xauth/xauth_method.h>
+
+/**
+ * XAuth plugin using Pluggable Authentication Modules to verify credentials.
+ */
+struct xauth_pam_t {
+
+	/**
+	 * Implemented xauth_method_t interface.
+	 */
+	xauth_method_t xauth_method;
+};
+
+/**
+ * Creates the XAuth method using PAM, acting as server.
+ *
+ * @param server	ID of the XAuth server
+ * @param peer		ID of the XAuth client
+ * @return			xauth_pam_t object
+ */
+xauth_pam_t *xauth_pam_create_server(identification_t *server,
+									 identification_t *peer);
+
+#endif /** XAUTH_PAM_H_ @}*/
diff --git a/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.c b/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.c
new file mode 100644
index 000000000..b9ba0b5ac
--- /dev/null
+++ b/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "xauth_pam_plugin.h"
+#include "xauth_pam.h"
+
+#include <daemon.h>
+
+#ifndef CAP_AUDIT_WRITE
+#define CAP_AUDIT_WRITE 29
+#endif
+
+METHOD(plugin_t, get_name, char*,
+	xauth_pam_plugin_t *this)
+{
+	return "xauth-pam";
+}
+
+METHOD(plugin_t, get_features, int,
+	xauth_pam_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+		PLUGIN_CALLBACK(xauth_method_register, xauth_pam_create_server),
+			PLUGIN_PROVIDE(XAUTH_SERVER, "pam"),
+	};
+	*features = f;
+	return countof(f);
+}
+
+METHOD(plugin_t, destroy, void,
+	xauth_pam_plugin_t *this)
+{
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *xauth_pam_plugin_create()
+{
+	xauth_pam_plugin_t *this;
+
+	INIT(this,
+		.plugin = {
+			.get_name = _get_name,
+			.get_features = _get_features,
+			.destroy = _destroy,
+		},
+	);
+
+	/* required for PAM authentication */
+	charon->caps->keep(charon->caps, CAP_AUDIT_WRITE);
+
+	return &this->plugin;
+}
diff --git a/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.h b/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.h
new file mode 100644
index 000000000..b75268880
--- /dev/null
+++ b/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup xauth_pam xauth_pam
+ * @ingroup cplugins
+ *
+ * @defgroup xauth_pam_plugin xauth_pam_plugin
+ * @{ @ingroup xauth_pam
+ */
+
+#ifndef XAUTH_PAM_PLUGIN_H_
+#define XAUTH_PAM_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct xauth_pam_plugin_t xauth_pam_plugin_t;
+
+/**
+ * XAuth plugin using Pluggable Authentication Modules to verify credentials.
+ */
+struct xauth_pam_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** XAUTH_PAM_PLUGIN_H_ @}*/