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strongswan: gmpdh plugin, package and strongswan-isakmp metapackage 

gmpdh plugin implements DH Groups (same as normal GMP plugin), but links to GMP statically and is stripped of all RSA based stuff. Binary size for plugin is ~20kbytes with no dependency on libgmp (200+ kbytes after squash), easilly fitting into flash space restricted devices.

strongswan-isakmp metapackage defines a minimal set of strongswan plugins (including gmpdh) for ISAKMP / IKEv1 PSK tunnels. Will fit even 4mb routers (like tplink wr841n) with disabled IPv6 support and packages (so its a trade - IPv6 or ipsec tunnels).

Signed-of-by: Mikalai Miadzvedz <brainsucker.na@gmail.com>
lilik-openwrt-22.03
brainsucker-na 9 years ago
committed by Mikalai Miadzvedz
parent
fbec0d5d11
commit
f705b3c0bf
2 changed files with 260 additions and 1 deletions
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  1. +39
    -1
      net/strongswan/Makefile
  2. +221
    -0
      net/strongswan/patches/305-minimal_dh_plugin.patch

+ 39
- 1
net/strongswan/Makefile View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=strongswan
PKG_VERSION:=5.3.3
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:=http://download.strongswan.org/ http://download2.strongswan.org/
@ -45,6 +45,7 @@ PKG_MOD_AVAILABLE:= \
gcm \
gcrypt \
gmp \
gmpdh \
ha \
hmac \
kernel-libipsec \
@ -254,6 +255,37 @@ $(call Package/strongswan/description/Default)
This meta-package contains only dependencies to match upstream defaults.
endef
define Package/strongswan-isakmp
$(call Package/strongswan/Default)
TITLE+= (isakmp)
DEPENDS:= +strongswan \
+strongswan-charon \
+strongswan-mod-aes \
+strongswan-mod-des \
+strongswan-mod-gmpdh \
+strongswan-mod-hmac \
+strongswan-mod-kernel-netlink \
+strongswan-mod-md5 \
+strongswan-mod-nonce \
+strongswan-mod-pubkey \
+strongswan-mod-random \
+strongswan-mod-sha1 \
+strongswan-mod-socket-default \
+strongswan-mod-stroke \
+strongswan-mod-uci \
+strongswan-mod-updown \
+strongswan-utils
endef
define Package/strongswan-isakmp/description
$(call Package/strongswan/description/Default)
This meta-package contains only dependencies to establish ISAKMP /
IKE PSK connections, dropping other capabilities in favor of small size
Can fit most routers even with 4Mb flash (after removing IPv6 support).
endef
define Package/strongswan-minimal
$(call Package/strongswan/Default)
TITLE+= (minimal)
@ -376,6 +408,10 @@ define Package/strongswan-full/install
true
endef
define Package/strongswan-isakmp/install
true
endef
define Package/strongswan-minimal/install
true
endef
@ -454,6 +490,7 @@ $(eval $(call BuildPackage,strongswan))
$(eval $(call BuildPackage,strongswan-default))
$(eval $(call BuildPackage,strongswan-full))
$(eval $(call BuildPackage,strongswan-minimal))
$(eval $(call BuildPackage,strongswan-isakmp))
$(eval $(call BuildPackage,strongswan-charon))
$(eval $(call BuildPackage,strongswan-utils))
$(eval $(call BuildPackage,strongswan-libtls))
@ -484,6 +521,7 @@ $(eval $(call BuildPlugin,fips-prf,FIPS PRF crypto,+strongswan-mod-sha1))
$(eval $(call BuildPlugin,gcm,GCM AEAD wrapper crypto,))
$(eval $(call BuildPlugin,gcrypt,libgcrypt,+PACKAGE_strongswan-mod-gcrypt:libgcrypt))
$(eval $(call BuildPlugin,gmp,libgmp,+PACKAGE_strongswan-mod-gmp:libgmp))
$(eval $(call BuildPlugin,gmpdh,DH-Groups; no libgmp dep,))
$(eval $(call BuildPlugin,ha,high availability cluster,))
$(eval $(call BuildPlugin,hmac,HMAC crypto,))
$(eval $(call BuildPlugin,kernel-libipsec,libipsec kernel interface,))


+ 221
- 0
net/strongswan/patches/305-minimal_dh_plugin.patch View File

@ -0,0 +1,221 @@
--- a/configure.ac
+++ b/configure.ac
@@ -135,6 +135,7 @@ ARG_DISBL_SET([fips-prf], [disable
ARG_ENABL_SET([gcm], [enables the GCM AEAD wrapper crypto plugin.])
ARG_ENABL_SET([gcrypt], [enables the libgcrypt plugin.])
ARG_DISBL_SET([gmp], [disable GNU MP (libgmp) based crypto implementation plugin.])
+ARG_DISBL_SET([gmpdh], [disable GNU MP (libgmp) based static-linked crypto DH minimal implementation plugin.])
ARG_DISBL_SET([hmac], [disable HMAC crypto implementation plugin.])
ARG_ENABL_SET([md4], [enable MD4 software implementation plugin.])
ARG_DISBL_SET([md5], [disable MD5 software implementation plugin.])
@@ -1310,6 +1311,7 @@ ADD_PLUGIN([gcrypt], [s ch
ADD_PLUGIN([af-alg], [s charon scepclient pki scripts medsrv attest nm cmd aikgen])
ADD_PLUGIN([fips-prf], [s charon nm cmd])
ADD_PLUGIN([gmp], [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
+ADD_PLUGIN([gmpdh], [s charon scepclient pki scripts manager medsrv attest nm cmd aikgen])
ADD_PLUGIN([agent], [s charon nm cmd])
ADD_PLUGIN([keychain], [s charon cmd])
ADD_PLUGIN([chapoly], [s charon scripts nm cmd])
@@ -1441,6 +1443,7 @@ AM_CONDITIONAL(USE_SHA1, test x$sha1 = x
AM_CONDITIONAL(USE_SHA2, test x$sha2 = xtrue)
AM_CONDITIONAL(USE_FIPS_PRF, test x$fips_prf = xtrue)
AM_CONDITIONAL(USE_GMP, test x$gmp = xtrue)
+AM_CONDITIONAL(USE_GMPDH, test x$gmpdh = xtrue)
AM_CONDITIONAL(USE_RDRAND, test x$rdrand = xtrue)
AM_CONDITIONAL(USE_AESNI, test x$aesni = xtrue)
AM_CONDITIONAL(USE_RANDOM, test x$random = xtrue)
@@ -1688,6 +1691,7 @@ AC_CONFIG_FILES([
src/libstrongswan/plugins/sha2/Makefile
src/libstrongswan/plugins/fips_prf/Makefile
src/libstrongswan/plugins/gmp/Makefile
+ src/libstrongswan/plugins/gmpdh/Makefile
src/libstrongswan/plugins/rdrand/Makefile
src/libstrongswan/plugins/aesni/Makefile
src/libstrongswan/plugins/random/Makefile
--- a/src/libstrongswan/Makefile.am
+++ b/src/libstrongswan/Makefile.am
@@ -295,6 +295,13 @@ if MONOLITHIC
endif
endif
+if USE_GMPDH
+ SUBDIRS += plugins/gmpdh
+if MONOLITHIC
+ libstrongswan_la_LIBADD += plugins/gmpdh/libstrongswan-gmpdh.la
+endif
+endif
+
if USE_RDRAND
SUBDIRS += plugins/rdrand
if MONOLITHIC
--- /dev/null
+++ b/src/libstrongswan/plugins/gmpdh/Makefile.am
@@ -0,0 +1,19 @@
+AM_CPPFLAGS = \
+ -I$(top_srcdir)/src/libstrongswan
+
+AM_CFLAGS = \
+ $(PLUGIN_CFLAGS)
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-gmpdh.la
+else
+plugin_LTLIBRARIES = libstrongswan-gmpdh.la
+endif
+
+libstrongswan_gmpdh_la_SOURCES = \
+ gmpdh_plugin.h gmpdh_plugin.c \
+ ../gmp/gmp_diffie_hellman.c ../gmp/gmp_diffie_hellman.h
+
+
+libstrongswan_gmpdh_la_LDFLAGS = -module -avoid-version -Wl,-Bstatic -Wl,-lgmp -Wl,-Bdynamic -Wl,--as-needed
+libstrongswan_gmpdh_la_LIBADD =
--- /dev/null
+++ b/src/libstrongswan/plugins/gmpdh/gmpdh_plugin.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2008-2009 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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 "gmpdh_plugin.h"
+
+#include <library.h>
+#include "../gmp/gmp_diffie_hellman.h"
+
+typedef struct private_gmpdh_plugin_t private_gmpdh_plugin_t;
+
+/**
+ * private data of gmp_plugin
+ */
+struct private_gmpdh_plugin_t {
+
+ /**
+ * public functions
+ */
+ gmpdh_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+ private_gmpdh_plugin_t *this)
+{
+ return "gmpdh";
+}
+
+METHOD(plugin_t, get_features, int,
+ private_gmpdh_plugin_t *this, plugin_feature_t *features[])
+{
+ static plugin_feature_t f[] = {
+ /* DH groups */
+ PLUGIN_REGISTER(DH, gmp_diffie_hellman_create),
+ PLUGIN_PROVIDE(DH, MODP_2048_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_2048_224),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_2048_256),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_1536_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_3072_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_4096_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_6144_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_8192_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_1024_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_1024_160),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_PROVIDE(DH, MODP_768_BIT),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ PLUGIN_REGISTER(DH, gmp_diffie_hellman_create_custom),
+ PLUGIN_PROVIDE(DH, MODP_CUSTOM),
+ PLUGIN_DEPENDS(RNG, RNG_STRONG),
+ };
+ *features = f;
+ return countof(f);
+}
+
+METHOD(plugin_t, destroy, void,
+ private_gmpdh_plugin_t *this)
+{
+ free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *gmpdh_plugin_create()
+{
+ private_gmpdh_plugin_t *this;
+
+ INIT(this,
+ .public = {
+ .plugin = {
+ .get_name = _get_name,
+ .get_features = _get_features,
+ .destroy = _destroy,
+ },
+ },
+ );
+
+ return &this->public.plugin;
+}
+
--- /dev/null
+++ b/src/libstrongswan/plugins/gmpdh/gmpdh_plugin.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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 gmpdh_p gmpdh
+ * @ingroup plugins
+ *
+ * @defgroup gmpdh_plugin gmpdh_plugin
+ * @{ @ingroup gmpdh_p
+ */
+
+#ifndef GMPDH_PLUGIN_H_
+#define GMPDH_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct gmpdh_plugin_t gmpdh_plugin_t;
+
+/**
+ * Plugin implementing asymmetric crypto algorithms using the GNU MP library.
+ */
+struct gmpdh_plugin_t {
+
+ /**
+ * implements plugin interface
+ */
+ plugin_t plugin;
+};
+
+#endif /** GMPDH_PLUGIN_H_ @}*/

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