openwrt/include/openssl-module.mk
Eneas U de Queiroz 0dc5fc8fa5
openssl: add legacy provider
This adapts the engine build infrastructure to allow building providers,
and packages the legacy provider.  Providers are the successors of
engines, which have been deprecated.

The legacy provider supplies OpenSSL implementations of algorithms that
have been deemed legacy, including DES, IDEA, MDC2, SEED, and Whirlpool.

Even though these algorithms are implemented in a separate package,
their removal makes the regular library smaller by 3%, so the build
options will remain to allow lean custom builds.  Their defaults will
change to 'y' if not bulding for a small flash, so that the regular
legacy package will contain a complete set of algorithms.

The engine build and configuration structure was changed to accomodate
providers, and adapt to the new style of openssl.cnf in version 3.0.

There is not a clean upgrade path for the /etc/ssl/openssl.cnf file,
installed by the openssl-conf package.  It is recommended to rename or
remove the old config file when flashing an image with the updated
openssl-conf package, then apply the changes manually.

An old openssl.cnf file will silently work, but new engine or provider
packages will not be enabled.  Any remaining engine config files under
/etc/ssl/engines.cnf.d can be removed.

On the build side, the include file used by engine packages was renamed
to openssl-module.mk, so the engine packages in other feeds need to
adapt.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
2023-04-05 08:24:49 -03:00

80 lines
2.1 KiB
Makefile

# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2022-2023 Enéas Ulir de Queiroz
ENGINES_DIR=engines-3
define Package/openssl/module/Default
SECTION:=libs
CATEGORY:=Libraries
SUBMENU:=SSL
DEPENDS:=libopenssl +libopenssl-conf
endef
define Package/openssl/engine/Default
$(Package/openssl/module/Default)
DEPENDS+=@OPENSSL_ENGINE
endef
# 1 = moudule type (engine|provider)
# 2 = module name
# 3 = directory to save .so file
# 4 = [ package name, defaults to libopenssl-$(2) ]
define Package/openssl/add-module
$(eval MOD_TYPE:=$(1))
$(eval MOD_NAME:=$(2))
$(eval MOD_DIR:=$(3))
$(eval OSSL_PKG:=$(if $(4),$(4),libopenssl-$(MOD_NAME)))
$(info Package/openssl/add-module 1='$(1)'; 2='$(2)'; 3='$(3)' 4='$(4)')
$(info MOD_TYPE='$(MOD_TYPE)'; MOD_NAME='$(MOD_NAME)'; MOD_DIR='$(MOD_DIR)' OSSL_PKG='$(OSSL_PKG)')
Package/$(OSSL_PKG)/conffiles:=/etc/ssl/modules.cnf.d/$(MOD_NAME).cnf
define Package/$(OSSL_PKG)/install
$$(INSTALL_DIR) $$(1)/$(MOD_DIR)
$$(INSTALL_BIN) $$(PKG_INSTALL_DIR)/$(MOD_DIR)/$(MOD_NAME).so \
$$(1)/$(MOD_DIR)
$$(INSTALL_DIR) $$(1)/etc/ssl/modules.cnf.d
$$(INSTALL_DATA) ./files/$(MOD_NAME).cnf $$(1)/etc/ssl/modules.cnf.d/
endef
define Package/$(OSSL_PKG)/postinst
#!/bin/sh
OPENSSL_UCI="$$$${IPKG_INSTROOT}/etc/config/openssl"
[ -z "$$$${IPKG_INSTROOT}" ] \
&& uci -q get openssl.$(MOD_NAME) >/dev/null \
&& exit 0
cat << EOF >> "$$$${OPENSSL_UCI}"
config $(MOD_TYPE) '$(MOD_NAME)'
option enabled '1'
EOF
[ -n "$$$${IPKG_INSTROOT}" ] || /etc/init.d/openssl reload
exit 0
endef
define Package/$(OSSL_PKG)/postrm
#!/bin/sh
[ -n "$$$${IPKG_INSTROOT}" ] && exit 0
uci -q delete openssl.$(MOD_NAME) && uci commit openssl
/etc/init.d/openssl reload
exit 0
endef
endef
# 1 = engine name
# 2 - package name, defaults to libopenssl-$(1)
define Package/openssl/add-engine
$(call Package/openssl/add-module,engine,$(1),/usr/lib/$(ENGINES_DIR),$(2))
endef
# 1 = provider name
# 2 = [ package name, defaults to libopenssl-$(1) ]
define Package/openssl/add-provider
$(call Package/openssl/add-module,provider,$(1),/usr/lib/ossl-modules,$(2))
endef