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Sinceb8c96a6b46("certs: simplify $(srctree)/ handling and remove config_filename macro"), when CONFIG_MODULE_SIG_KEY is empty, signing_key.x509 fails to build: CERT certs/signing_key.x509 Usage: extract-cert <source> <dest> make[1]: *** [certs/Makefile:78: certs/signing_key.x509] Error 2 make: *** [Makefile:1831: certs] Error 2 Pass "" to the first argument of extract-cert to fix the build error. Link: https://lore.kernel.org/linux-kbuild/20220120094606.2skuyb26yjlnu66q@lion.mk-sys.cz/T/#u Fixes:b8c96a6b46("certs: simplify $(srctree)/ handling and remove config_filename macro") Reported-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Michal Kubecek <mkubecek@suse.cz>
94 lines
3.2 KiB
Makefile
94 lines
3.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux kernel signature checking certificates.
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#
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obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o
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obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o
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obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
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ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),)
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obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
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else
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obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o
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endif
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quiet_cmd_extract_certs = CERT $@
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cmd_extract_certs = $(obj)/extract-cert $(2) $@
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$(obj)/system_certificates.o: $(obj)/x509_certificate_list
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$(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE
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$(call if_changed,extract_certs,$(if $(CONFIG_SYSTEM_TRUSTED_KEYS),$<,""))
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targets += x509_certificate_list
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ifeq ($(CONFIG_MODULE_SIG),y)
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SIGN_KEY = y
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endif
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ifeq ($(CONFIG_IMA_APPRAISE_MODSIG),y)
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ifeq ($(CONFIG_MODULES),y)
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SIGN_KEY = y
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endif
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endif
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ifdef SIGN_KEY
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###############################################################################
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#
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# If module signing is requested, say by allyesconfig, but a key has not been
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# supplied, then one will need to be generated to make sure the build does not
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# fail and that the kernel may be used afterwards.
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#
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###############################################################################
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# We do it this way rather than having a boolean option for enabling an
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# external private key, because 'make randconfig' might enable such a
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# boolean option and we unfortunately can't make it depend on !RANDCONFIG.
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ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_key.pem)
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keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1
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quiet_cmd_gen_key = GENKEY $@
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cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
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-batch -x509 -config $< \
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-outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1
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$(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
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$(call if_changed,gen_key)
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targets += signing_key.pem
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quiet_cmd_copy_x509_config = COPY $@
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cmd_copy_x509_config = cat $(srctree)/$(src)/default_x509.genkey > $@
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# You can provide your own config file. If not present, copy the default one.
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$(obj)/x509.genkey:
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$(call cmd,copy_x509_config)
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endif # CONFIG_MODULE_SIG_KEY
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# If CONFIG_MODULE_SIG_KEY isn't a PKCS#11 URI, depend on it
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ifneq ($(filter-out pkcs11:%, $(CONFIG_MODULE_SIG_KEY)),)
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X509_DEP := $(CONFIG_MODULE_SIG_KEY)
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endif
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$(obj)/system_certificates.o: $(obj)/signing_key.x509
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$(obj)/signing_key.x509: $(X509_DEP) $(obj)/extract-cert FORCE
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$(call if_changed,extract_certs,$(if $(CONFIG_MODULE_SIG_KEY),$(if $(X509_DEP),$<,$(CONFIG_MODULE_SIG_KEY)),""))
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endif # CONFIG_MODULE_SIG
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targets += signing_key.x509
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$(obj)/revocation_certificates.o: $(obj)/x509_revocation_list
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$(obj)/x509_revocation_list: $(CONFIG_SYSTEM_REVOCATION_KEYS) $(obj)/extract-cert FORCE
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$(call if_changed,extract_certs,$(if $(CONFIG_SYSTEM_REVOCATION_KEYS),$<,""))
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targets += x509_revocation_list
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hostprogs := extract-cert
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HOSTCFLAGS_extract-cert.o = $(shell pkg-config --cflags libcrypto 2> /dev/null)
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HOSTLDLIBS_extract-cert = $(shell pkg-config --libs libcrypto 2> /dev/null || echo -lcrypto)
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