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openwrt/package/network/services/dropbear/Makefile
Paul Spooren d0f295837a dropbear: Enable Ed25519 for normal devices 
The Ed25519 key pairs are much shorter than RSA pairs and are supported
by default in OpenSSH. Looking at websites explaining how to create new
SSH keys, many suggest using Ed25519 rather than RSA, however consider
the former as not yet widely established. OpenWrt likely has a positive
influence on that development.

As enabling Ed25519 is a compile time option, it is currently not
possible to install the feature via `opkg` nor select that option in an
ImageBuilder.

Due to the size impact of **12kB** the option should only be enabled for
devices with `!SMALL_FLASH`.

This approach seems cleaner than splitting `dropbear` into two packages
like `dropbear` and `dropbear-ed25519`.

Signed-off-by: Paul Spooren <mail@aparcar.org>
2020-09-06 23:19:20 +02:00

185 lines
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Makefile
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#
# Copyright (C) 2006-2020 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
PKG_NAME:=dropbear
PKG_VERSION:=2020.80
PKG_RELEASE:=3
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:= \
http://matt.ucc.asn.au/dropbear/releases/ \
https://dropbear.nl/mirror/releases/
PKG_HASH:=d927941b91f2da150b2033f1a88b6a47999bf0afb1493a73e9216cffdb5d7949
PKG_LICENSE:=MIT
PKG_LICENSE_FILES:=LICENSE libtomcrypt/LICENSE libtommath/LICENSE
PKG_CPE_ID:=cpe:/a:matt_johnston:dropbear_ssh_server
PKG_BUILD_PARALLEL:=1
PKG_ASLR_PIE_REGULAR:=1
PKG_USE_MIPS16:=0
PKG_FIXUP:=autoreconf
PKG_FLAGS:=nonshared
PKG_CONFIG_DEPENDS:= \
CONFIG_TARGET_INIT_PATH CONFIG_DROPBEAR_ECC CONFIG_DROPBEAR_ECC_FULL \
CONFIG_DROPBEAR_CURVE25519 CONFIG_DROPBEAR_ZLIB \
CONFIG_DROPBEAR_ED25519 CONFIG_DROPBEAR_CHACHA20POLY1305 \
CONFIG_DROPBEAR_UTMP CONFIG_DROPBEAR_PUTUTLINE \
CONFIG_DROPBEAR_DBCLIENT CONFIG_DROPBEAR_SCP
include $(INCLUDE_DIR)/package.mk
ifneq ($(DUMP),1)
STAMP_CONFIGURED:=$(strip $(STAMP_CONFIGURED))_$(shell echo $(CONFIG_TARGET_INIT_PATH) | mkhash md5)
endif
define Package/dropbear/Default
URL:=http://matt.ucc.asn.au/dropbear/
endef
define Package/dropbear/config
source "$(SOURCE)/Config.in"
endef
define Package/dropbear
$(call Package/dropbear/Default)
SECTION:=net
CATEGORY:=Base system
TITLE:=Small SSH2 client/server
DEPENDS:= +DROPBEAR_ZLIB:zlib
ALTERNATIVES:=
$(if $(CONFIG_DROPBEAR_SCP),ALTERNATIVES+= \
100:/usr/bin/scp:/usr/sbin/dropbear,)
$(if $(CONFIG_DROPBEAR_DBCLIENT),ALTERNATIVES+= \
100:/usr/bin/ssh:/usr/sbin/dropbear,)
endef
define Package/dropbear/description
A small SSH2 server/client designed for small memory environments.
endef
define Package/dropbear/conffiles
$(if $(CONFIG_DROPBEAR_ED25519),/etc/dropbear/dropbear_ed25519_host_key)
$(if $(CONFIG_DROPBEAR_ECC),/etc/dropbear/dropbear_ecdsa_host_key)
/etc/dropbear/dropbear_rsa_host_key
/etc/config/dropbear
endef
define Package/dropbearconvert
$(call Package/dropbear/Default)
SECTION:=utils
CATEGORY:=Utilities
TITLE:=Utility for converting SSH keys
DEPENDS:= +DROPBEAR_ZLIB:zlib
endef
CONFIGURE_ARGS += \
--disable-pam \
--enable-openpty \
--enable-syslog \
--disable-lastlog \
--disable-utmpx \
$(if $(CONFIG_DROPBEAR_UTMP),,--disable-utmp) \
--disable-wtmp \
--disable-wtmpx \
--disable-loginfunc \
$(if $(CONFIG_DROPBEAR_PUTUTLINE),,--disable-pututline) \
--disable-pututxline \
$(if $(CONFIG_DROPBEAR_ZLIB),,--disable-zlib) \
--enable-bundled-libtom
TARGET_CFLAGS += -DARGTYPE=3 -ffunction-sections -fdata-sections -flto
TARGET_LDFLAGS += -Wl,--gc-sections -flto=jobserver
define Build/Configure
: > $(PKG_BUILD_DIR)/localoptions.h
$(Build/Configure/Default)
echo '#define DEFAULT_PATH "$(TARGET_INIT_PATH)"' >> \
$(PKG_BUILD_DIR)/localoptions.h
echo '#define DROPBEAR_CURVE25519 $(if $(CONFIG_DROPBEAR_CURVE25519),1,0)' >> \
$(PKG_BUILD_DIR)/localoptions.h
for OPTION in DROPBEAR_ECDSA DROPBEAR_ECDH; do \
echo "#define $$$$OPTION $(if $(CONFIG_DROPBEAR_ECC),1,0)" >> \
$(PKG_BUILD_DIR)/localoptions.h; \
done
echo '#define DROPBEAR_ED25519 $(if $(CONFIG_DROPBEAR_ED25519),1,0)' >> \
$(PKG_BUILD_DIR)/localoptions.h
echo '#define DROPBEAR_CHACHA20POLY1305 $(if $(CONFIG_DROPBEAR_CHACHA20POLY1305),1,0)' >> \
$(PKG_BUILD_DIR)/localoptions.h
# remove protocol idented software version number
$(ESED) 's,^(#define LOCAL_IDENT) .*$$$$,\1 "SSH-2.0-dropbear",g' \
$(PKG_BUILD_DIR)/sysoptions.h
# disable legacy/unsafe methods and unused functionality
for OPTION in INETD_MODE DROPBEAR_CLI_NETCAT \
DROPBEAR_DSS DROPBEAR_USE_PASSWORD_ENV DO_MOTD ; do \
echo "#define $$$$OPTION 0" >> \
$(PKG_BUILD_DIR)/localoptions.h; \
done
# enable nistp384 and nistp521 only if full ECC support was requested
for OPTION in DROPBEAR_ECC_384 DROPBEAR_ECC_521; do \
$(ESED) 's,^(#define '$$$$OPTION') .*$$$$,\1 $(if $(CONFIG_DROPBEAR_ECC_FULL),1,0),g' \
$(PKG_BUILD_DIR)/sysoptions.h; \
done
# Enforce rebuild of svr-chansession.c
rm -f $(PKG_BUILD_DIR)/svr-chansession.o
# Rebuild them on config change
+$(MAKE) -C $(PKG_BUILD_DIR)/libtomcrypt clean
+$(MAKE) -C $(PKG_BUILD_DIR)/libtommath clean
endef
define Build/Compile
+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) \
$(TARGET_CONFIGURE_OPTS) \
PROGRAMS="dropbear $(if $(CONFIG_DROPBEAR_DBCLIENT),dbclient,) dropbearkey $(if $(CONFIG_DROPBEAR_SCP),scp,)" \
MULTI=1 SCPPROGRESS=1
+$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) \
$(TARGET_CONFIGURE_OPTS) \
PROGRAMS="dropbearconvert"
endef
define Package/dropbear/install
$(INSTALL_DIR) $(1)/usr/sbin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/dropbearmulti $(1)/usr/sbin/dropbear
$(INSTALL_DIR) $(1)/usr/bin
$(if $(CONFIG_DROPBEAR_DBCLIENT),$(LN) ../sbin/dropbear $(1)/usr/bin/dbclient,)
$(LN) ../sbin/dropbear $(1)/usr/bin/dropbearkey
$(INSTALL_DIR) $(1)/etc/config
$(INSTALL_CONF) ./files/dropbear.config $(1)/etc/config/dropbear
$(INSTALL_DIR) $(1)/etc/init.d
$(INSTALL_BIN) ./files/dropbear.init $(1)/etc/init.d/dropbear
$(INSTALL_DIR) $(1)/usr/lib/opkg/info
$(INSTALL_DIR) $(1)/etc/dropbear
$(INSTALL_DIR) $(1)/lib/preinit
$(INSTALL_DATA) ./files/dropbear.failsafe $(1)/lib/preinit/99_10_failsafe_dropbear
$(if $(CONFIG_DROPBEAR_ED25519),touch $(1)/etc/dropbear/dropbear_ed25519_host_key)
$(if $(CONFIG_DROPBEAR_ECC),touch $(1)/etc/dropbear/dropbear_ecdsa_host_key)
touch $(1)/etc/dropbear/dropbear_rsa_host_key
endef
define Package/dropbearconvert/install
$(INSTALL_DIR) $(1)/usr/bin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/dropbearconvert $(1)/usr/bin/dropbearconvert
endef
$(eval $(call BuildPackage,dropbear))
$(eval $(call BuildPackage,dropbearconvert))
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