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>

1 files changed, 25 insertions, 10 deletions

diff --git a/package/libs/openssl/Makefile b/package/libs/openssl/Makefile
index 66872d5436..add3eb7db6 100644
--- a/package/libs/openssl/Makefile
+++ b/package/libs/openssl/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=openssl
 PKG_VERSION:=3.0.8
-PKG_RELEASE:=6
+PKG_RELEASE:=7
 PKG_BUILD_FLAGS:=no-mips16 gc-sections
 
 PKG_BUILD_PARALLEL:=1
@@ -64,7 +64,7 @@ PKG_CONFIG_DEPENDS:= \
 	CONFIG_OPENSSL_WITH_WHIRLPOOL
 
 include $(INCLUDE_DIR)/package.mk
-include $(INCLUDE_DIR)/openssl-engine.mk
+include $(INCLUDE_DIR)/openssl-module.mk
 
 ifneq ($(CONFIG_CCACHE),)
 HOSTCC=$(HOSTCC_NOCACHE)
@@ -129,8 +129,8 @@ endef
 
 define Package/libopenssl-conf/conffiles
 /etc/ssl/openssl.cnf
-$(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_DEVCRYPTO),/etc/ssl/engines.cnf.d/devcrypto.cnf)
-$(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_PADLOCK),/etc/ssl/engines.cnf.d/padlock.cnf)
+$(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_DEVCRYPTO),/etc/ssl/modules.cnf.d/devcrypto.cnf)
+$(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_PADLOCK),/etc/ssl/modules.cnf.d/padlock.cnf)
 endef
 
 define Package/libopenssl-conf/description
@@ -162,6 +162,20 @@ $(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_PADLOCK),add_engine_config padlock)
 endef
 endif
 
+$(eval $(call Package/openssl/add-provider,legacy))
+define Package/libopenssl-legacy
+  $(call Package/openssl/Default)
+  $(call Package/openssl/module/Default)
+  TITLE:=OpenSSL legacy provider
+endef
+
+define Package/libopenssl-legacy/description
+The OpenSSL legacy provider supplies OpenSSL implementations of algorithms that
+have been deemed legacy. Such algorithms have commonly fallen out of use, have
+been deemed insecure by the cryptography community, or something similar.  See
+https://www.openssl.org/docs/man3.0/man7/OSSL_PROVIDER-legacy.html
+endef
+
 $(eval $(call Package/openssl/add-engine,afalg))
 define Package/libopenssl-afalg
   $(call Package/openssl/Default)
@@ -174,7 +188,7 @@ endef
 define Package/libopenssl-afalg/description
 This package adds an engine that enables hardware acceleration
 through the AF_ALG kernel interface.
-See https://www.openssl.org/docs/man1.1.1/man5/config.html#Engine-Configuration-Module
+See https://www.openssl.org/docs/man3.0/man5/config.html#Engine-Configuration
 and https://openwrt.org/docs/techref/hardware/cryptographic.hardware.accelerators
 The engine_id is "afalg"
 endef
@@ -190,7 +204,7 @@ endef
 define Package/libopenssl-devcrypto/description
 This package adds an engine that enables hardware acceleration
 through the /dev/crypto kernel interface.
-See https://www.openssl.org/docs/man1.1.1/man5/config.html#Engine-Configuration-Module
+See https://www.openssl.org/docs/man3.0/man5/config.html#Engine-Configuration
 and https://openwrt.org/docs/techref/hardware/cryptographic.hardware.accelerators
 The engine_id is "devcrypto"
 endef
@@ -206,7 +220,7 @@ endef
 
 define Package/libopenssl-padlock/description
 This package adds an engine that enables VIA Padlock hardware acceleration.
-See https://www.openssl.org/docs/man1.1.1/man5/config.html#Engine-Configuration-Module
+See https://www.openssl.org/docs/man3.0/man5/config.html#Engine-Configuration
 and https://openwrt.org/docs/techref/hardware/cryptographic.hardware.accelerators
 The engine_id is "padlock"
 endef
@@ -403,16 +417,16 @@ define Package/libopenssl/install
 endef
 
 define Package/libopenssl-conf/install
-	$(INSTALL_DIR) $(1)/etc/ssl/engines.cnf.d $(1)/etc/config $(1)/etc/init.d
+	$(INSTALL_DIR) $(1)/etc/ssl/modules.cnf.d $(1)/etc/config $(1)/etc/init.d
 	$(CP) $(PKG_INSTALL_DIR)/etc/ssl/openssl.cnf $(1)/etc/ssl/
 	$(INSTALL_BIN) ./files/openssl.init $(1)/etc/init.d/openssl
 	$(SED) 's!%ENGINES_DIR%!/usr/lib/$(ENGINES_DIR)!' $(1)/etc/init.d/openssl
 	touch $(1)/etc/config/openssl
 	$(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_DEVCRYPTO),
-		$(CP) ./files/devcrypto.cnf $(1)/etc/ssl/engines.cnf.d/
+		$(CP) ./files/devcrypto.cnf $(1)/etc/ssl/modules.cnf.d/
 		echo -e "config engine 'devcrypto'\n\toption enabled '1'" >> $(1)/etc/config/openssl)
 	$(if $(CONFIG_OPENSSL_ENGINE_BUILTIN_PADLOCK),
-		$(CP) ./files/padlock.cnf $(1)/etc/ssl/engines.cnf.d/
+		$(CP) ./files/padlock.cnf $(1)/etc/ssl/modules.cnf.d/
 		echo -e "\nconfig engine 'padlock'\n\toption enabled '1'" >> $(1)/etc/config/openssl)
 endef
 
@@ -425,5 +439,6 @@ $(eval $(call BuildPackage,libopenssl))
 $(eval $(call BuildPackage,libopenssl-conf))
 $(eval $(call BuildPackage,libopenssl-afalg))
 $(eval $(call BuildPackage,libopenssl-devcrypto))
+$(eval $(call BuildPackage,libopenssl-legacy))
 $(eval $(call BuildPackage,libopenssl-padlock))
 $(eval $(call BuildPackage,openssl-util))