Imported Upstream version 4.5.2

6 files changed, 1054 insertions, 0 deletions

diff --git a/src/libcharon/plugins/coupling/Makefile.am b/src/libcharon/plugins/coupling/Makefile.am
new file mode 100644
index 000000000..642ce820c
--- /dev/null
+++ b/src/libcharon/plugins/coupling/Makefile.am
@@ -0,0 +1,16 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = -rdynamic
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-coupling.la
+else
+plugin_LTLIBRARIES = libstrongswan-coupling.la
+endif
+
+libstrongswan_coupling_la_SOURCES = coupling_plugin.h coupling_plugin.c \
+	coupling_validator.h coupling_validator.c
+
+libstrongswan_coupling_la_LDFLAGS = -module -avoid-version
diff --git a/src/libcharon/plugins/coupling/Makefile.in b/src/libcharon/plugins/coupling/Makefile.in
new file mode 100644
index 000000000..a3104e4c0
--- /dev/null
+++ b/src/libcharon/plugins/coupling/Makefile.in
@@ -0,0 +1,608 @@
+# 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@
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+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
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+host_triplet = @host@
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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_coupling_la_OBJECTS = coupling_plugin.lo \
+	coupling_validator.lo
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+	$(am_libstrongswan_coupling_la_OBJECTS)
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+	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+	$(AM_CFLAGS) $(CFLAGS) $(libstrongswan_coupling_la_LDFLAGS) \
+	$(LDFLAGS) -o $@
+@MONOLITHIC_FALSE@am_libstrongswan_coupling_la_rpath = -rpath \
+@MONOLITHIC_FALSE@	$(plugindir)
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+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = -rdynamic
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+@MONOLITHIC_FALSE@plugin_LTLIBRARIES = libstrongswan-coupling.la
+libstrongswan_coupling_la_SOURCES = coupling_plugin.h coupling_plugin.c \
+	coupling_validator.h coupling_validator.c
+
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+	  */*) $(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/coupling/coupling_plugin.c b/src/libcharon/plugins/coupling/coupling_plugin.c
new file mode 100644
index 000000000..7ccc51db5
--- /dev/null
+++ b/src/libcharon/plugins/coupling/coupling_plugin.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 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 "coupling_plugin.h"
+
+#include "coupling_validator.h"
+
+#include <daemon.h>
+
+typedef struct private_coupling_plugin_t private_coupling_plugin_t;
+
+/**
+ * private data of coupling plugin
+ */
+struct private_coupling_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	coupling_plugin_t public;
+
+	/**
+	 * validator controlling couplings
+	 */
+	coupling_validator_t *validator;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_coupling_plugin_t *this)
+{
+	return "coupling";
+}
+
+METHOD(plugin_t, destroy, void,
+	private_coupling_plugin_t *this)
+{
+	lib->credmgr->remove_validator(lib->credmgr, &this->validator->validator);
+	this->validator->destroy(this->validator);
+	free(this);
+}
+
+/**
+ * Plugin constructor
+ */
+plugin_t *coupling_plugin_create()
+{
+	private_coupling_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.reload = (void*)return_false,
+				.destroy = _destroy,
+			},
+		},
+		.validator = coupling_validator_create(),
+	);
+
+	if (!this->validator)
+	{
+		free(this);
+		return NULL;
+	}
+
+	lib->credmgr->add_validator(lib->credmgr, &this->validator->validator);
+
+	return &this->public.plugin;
+}
diff --git a/src/libcharon/plugins/coupling/coupling_plugin.h b/src/libcharon/plugins/coupling/coupling_plugin.h
new file mode 100644
index 000000000..645100b45
--- /dev/null
+++ b/src/libcharon/plugins/coupling/coupling_plugin.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 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 coupling coupling
+ * @ingroup cplugins
+ *
+ * @defgroup coupling_plugin coupling_plugin
+ * @{ @ingroup coupling
+ */
+
+#ifndef COUPLING_PLUGIN_H_
+#define COUPLING_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct coupling_plugin_t coupling_plugin_t;
+
+/**
+ * Plugin to couple peer certificates permanently to peer authentication.
+ */
+struct coupling_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** COUPLING_PLUGIN_H_ @}*/
diff --git a/src/libcharon/plugins/coupling/coupling_validator.c b/src/libcharon/plugins/coupling/coupling_validator.c
new file mode 100644
index 000000000..06b6f7d86
--- /dev/null
+++ b/src/libcharon/plugins/coupling/coupling_validator.c
@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 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 "coupling_validator.h"
+
+#include <errno.h>
+#include <time.h>
+
+#include <daemon.h>
+#include <threading/mutex.h>
+
+/* buffer size for hex-encoded hash */
+#define MAX_HASH_SIZE (HASH_SIZE_SHA512 * 2 + 1)
+
+typedef struct private_coupling_validator_t private_coupling_validator_t;
+
+/**
+ * Private data of an coupling_validator_t object.
+ */
+struct private_coupling_validator_t {
+
+	/**
+	 * Public coupling_validator_t interface.
+	 */
+	coupling_validator_t public;
+
+	/**
+	 * Mutex
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * File with device couplings
+	 */
+	FILE *f;
+
+	/**
+	 * Hasher to create hashes
+	 */
+	hasher_t *hasher;
+
+	/**
+	 * maximum number of couplings
+	 */
+	int max_couplings;
+};
+
+/**
+ * Get hash of a certificate
+ */
+static bool get_cert_hash(private_coupling_validator_t *this,
+						  certificate_t *cert, char *hex)
+{
+	char buf[MAX_HASH_SIZE];
+	chunk_t encoding;
+
+	if (!cert->get_encoding(cert, CERT_ASN1_DER, &encoding))
+	{
+		return FALSE;
+	}
+	this->hasher->get_hash(this->hasher, encoding, buf);
+	free(encoding.ptr);
+	chunk_to_hex(chunk_create(buf, this->hasher->get_hash_size(this->hasher)),
+				 hex, FALSE);
+	return TRUE;
+}
+
+/**
+ * Check if we have an entry for a given hash
+ */
+static bool has_entry(private_coupling_validator_t *this, char *hash)
+{
+	char line[256];
+	int hash_len;
+
+	hash_len = strlen(hash);
+	rewind(this->f);
+
+	while (fgets(line, sizeof(line), this->f))
+	{
+		if (strlen(line) >= hash_len &&
+			strncaseeq(line, hash, hash_len))
+		{
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+/**
+ * Get the number of coupling entries we currently have
+ */
+static int get_number_of_entries(private_coupling_validator_t *this)
+{
+	char line[256];
+	int count = 0;
+
+	rewind(this->f);
+
+	while (fgets(line, sizeof(line), this->f))
+	{
+		/* valid entries start with hex encoded hash */
+		if (strchr("1234567890abcdefABCDEF", line[0]))
+		{
+			count++;
+		}
+	}
+	return count;
+}
+
+/**
+ * Add a new entry to the file
+ */
+static bool add_entry(private_coupling_validator_t *this, char *hash,
+					  identification_t *id)
+{
+	return fseek(this->f, 0, SEEK_END) == 0 &&
+		   fprintf(this->f, "%s %u '%Y'\n", hash, time(NULL), id) > 0;
+}
+
+METHOD(cert_validator_t, validate, bool,
+	private_coupling_validator_t *this,
+	certificate_t *subject, certificate_t *issuer,
+	bool online, u_int pathlen, bool anchor, auth_cfg_t *auth)
+{
+	bool valid = FALSE;
+	char hash[MAX_HASH_SIZE];
+
+	if (pathlen != 0)
+	{
+		return TRUE;
+	}
+	if (get_cert_hash(this, subject, hash))
+	{
+		this->mutex->lock(this->mutex);
+		if (has_entry(this, hash))
+		{
+			DBG1(DBG_CFG, "coupled certificate '%Y' found, accepted",
+				 subject->get_subject(subject));
+			valid = TRUE;
+		}
+		else if (get_number_of_entries(this) < this->max_couplings)
+		{
+			if (add_entry(this, hash, subject->get_subject(subject)))
+			{
+				DBG1(DBG_CFG, "coupled new certificate '%Y'",
+					 subject->get_subject(subject));
+				valid = TRUE;
+			}
+			else
+			{
+				DBG1(DBG_CFG, "coupling new certificate '%Y' failed",
+					 subject->get_subject(subject));
+			}
+		}
+		else
+		{
+			DBG1(DBG_CFG, "coupling new certificate '%Y' failed, limit of %d "
+				 "couplings reached", subject->get_subject(subject),
+				 this->max_couplings);
+		}
+		this->mutex->unlock(this->mutex);
+	}
+	return valid;
+}
+
+METHOD(coupling_validator_t, destroy, void,
+	private_coupling_validator_t *this)
+{
+	if (this->f)
+	{
+		fclose(this->f);
+	}
+	DESTROY_IF(this->hasher);
+	this->mutex->destroy(this->mutex);
+	free(this);
+}
+
+/**
+ * See header
+ */
+coupling_validator_t *coupling_validator_create()
+{
+	private_coupling_validator_t *this;
+	char *path, *hash;
+	int i;
+	struct {
+		hash_algorithm_t alg;
+		char *name;
+	} hash_types[] = {
+		{ HASH_MD5,		"md5"},
+		{ HASH_SHA1,	"sha1"},
+		{ HASH_SHA256,	"sha256"},
+		{ HASH_SHA384,	"sha384"},
+		{ HASH_SHA512,	"sha512"},
+	};
+
+	INIT(this,
+		.public = {
+			.validator = {
+				.validate = _validate,
+			},
+			.destroy = _destroy,
+		},
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+		.max_couplings = lib->settings->get_int(lib->settings,
+									  "charon.plugins.coupling.max", 1),
+	);
+
+	hash = lib->settings->get_str(lib->settings,
+								  "charon.plugins.coupling.hash", "sha1");
+	for (i = 0; i < countof(hash_types); i++)
+	{
+		if (strcaseeq(hash_types[i].name, hash))
+		{
+			this->hasher = lib->crypto->create_hasher(lib->crypto,
+													  hash_types[i].alg);
+			break;
+		}
+	}
+	if (!this->hasher)
+	{
+		DBG1(DBG_CFG, "unsupported coupling hash algorithm: %s", hash);
+		destroy(this);
+		return NULL;
+	}
+
+	path = lib->settings->get_str(lib->settings,
+								  "charon.plugins.coupling.file", NULL);
+	if (!path)
+	{
+		DBG1(DBG_CFG, "coupling file path unspecified");
+		destroy(this);
+		return NULL;
+	}
+	this->f = fopen(path, "a+");
+	if (!this->f)
+	{
+		DBG1(DBG_CFG, "opening coupling file '%s' failed: %s",
+			 path, strerror(errno));
+		destroy(this);
+		return NULL;
+	}
+	setlinebuf(this->f);
+	return &this->public;
+}
diff --git a/src/libcharon/plugins/coupling/coupling_validator.h b/src/libcharon/plugins/coupling/coupling_validator.h
new file mode 100644
index 000000000..d6b4d3718
--- /dev/null
+++ b/src/libcharon/plugins/coupling/coupling_validator.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 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 coupling_validator coupling_validator
+ * @{ @ingroup coupling
+ */
+
+#ifndef COUPLING_VALIDATOR_H_
+#define COUPLING_VALIDATOR_H_
+
+#include <credentials/cert_validator.h>
+
+typedef struct coupling_validator_t coupling_validator_t;
+
+/**
+ * Validator that couples authenticated certificates permanently.
+ */
+struct coupling_validator_t {
+
+	/**
+	 * Implements cert_validator_t interface.
+	 */
+	cert_validator_t validator;
+
+	/**
+	 * Destroy a coupling_validator_t.
+	 */
+	void (*destroy)(coupling_validator_t *this);
+};
+
+/**
+ * Create a coupling_validator instance.
+ */
+coupling_validator_t *coupling_validator_create();
+
+#endif /** COUPLING_VALIDATOR_H_ @}*/