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1# SPDX-License-Identifier: GPL-2.02#3# Makefile for the linux kernel signature checking certificates.4#5 6obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o7obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o blacklist_hashes.o8obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o9 10$(obj)/blacklist_hashes.o: $(obj)/blacklist_hash_list11CFLAGS_blacklist_hashes.o := -I $(obj)12 13quiet_cmd_check_and_copy_blacklist_hash_list = GEN $@14 cmd_check_and_copy_blacklist_hash_list = \15 $(if $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST), \16 $(AWK) -f $(src)/check-blacklist-hashes.awk $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) >&2; \17 { cat $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST); echo $(comma) NULL; } > $@, \18 echo NULL > $@)19 20$(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) FORCE21 $(call if_changed,check_and_copy_blacklist_hash_list)22 23targets += blacklist_hash_list24 25quiet_cmd_extract_certs = CERT $@26 cmd_extract_certs = $(obj)/extract-cert "$(extract-cert-in)" $@27extract-cert-in = $(filter-out $(obj)/extract-cert, $(real-prereqs))28 29$(obj)/system_certificates.o: $(obj)/x509_certificate_list30 31$(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE32 $(call if_changed,extract_certs)33 34targets += x509_certificate_list35 36# If module signing is requested, say by allyesconfig, but a key has not been37# supplied, then one will need to be generated to make sure the build does not38# fail and that the kernel may be used afterwards.39#40# We do it this way rather than having a boolean option for enabling an41# external private key, because 'make randconfig' might enable such a42# boolean option and we unfortunately can't make it depend on !RANDCONFIG.43ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_key.pem)44 45keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r146 47quiet_cmd_gen_key = GENKEY $@48 cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \49 -batch -x509 -config $< \50 -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&151 52$(obj)/signing_key.pem: $(obj)/x509.genkey FORCE53 $(call if_changed,gen_key)54 55targets += signing_key.pem56 57quiet_cmd_copy_x509_config = COPY $@58 cmd_copy_x509_config = cat $(src)/default_x509.genkey > $@59 60# You can provide your own config file. If not present, copy the default one.61$(obj)/x509.genkey:62 $(call cmd,copy_x509_config)63 64endif # CONFIG_MODULE_SIG_KEY65 66$(obj)/system_certificates.o: $(obj)/signing_key.x50967 68PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY))69ifdef PKCS11_URI70$(obj)/signing_key.x509: extract-cert-in := $(PKCS11_URI)71endif72 73$(obj)/signing_key.x509: $(filter-out $(PKCS11_URI),$(CONFIG_MODULE_SIG_KEY)) $(obj)/extract-cert FORCE74 $(call if_changed,extract_certs)75 76targets += signing_key.x50977 78$(obj)/revocation_certificates.o: $(obj)/x509_revocation_list79 80$(obj)/x509_revocation_list: $(CONFIG_SYSTEM_REVOCATION_KEYS) $(obj)/extract-cert FORCE81 $(call if_changed,extract_certs)82 83targets += x509_revocation_list84 85hostprogs := extract-cert86 87HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null) -I$(srctree)/scripts88HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)89