1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for the linux kernel signature checking certificates. 4# 5 6obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o 7obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o 8obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o 9ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),"") 10obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o 11else 12obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o 13endif 14 15quiet_cmd_extract_certs = CERT $@ 16 cmd_extract_certs = scripts/extract-cert $(2) $@ 17 18ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y) 19 20$(eval $(call config_filename,SYSTEM_TRUSTED_KEYS)) 21 22$(obj)/system_certificates.o: $(obj)/x509_certificate_list 23 24$(obj)/x509_certificate_list: scripts/extract-cert $(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(SYSTEM_TRUSTED_KEYS_FILENAME) FORCE 25 $(call if_changed,extract_certs,$(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_TRUSTED_KEYS)) 26endif # CONFIG_SYSTEM_TRUSTED_KEYRING 27 28targets += x509_certificate_list 29 30ifeq ($(CONFIG_MODULE_SIG),y) 31 SIGN_KEY = y 32endif 33 34ifeq ($(CONFIG_IMA_APPRAISE_MODSIG),y) 35ifeq ($(CONFIG_MODULES),y) 36 SIGN_KEY = y 37endif 38endif 39 40ifdef SIGN_KEY 41############################################################################### 42# 43# If module signing is requested, say by allyesconfig, but a key has not been 44# supplied, then one will need to be generated to make sure the build does not 45# fail and that the kernel may be used afterwards. 46# 47############################################################################### 48 49# We do it this way rather than having a boolean option for enabling an 50# external private key, because 'make randconfig' might enable such a 51# boolean option and we unfortunately can't make it depend on !RANDCONFIG. 52ifeq ($(CONFIG_MODULE_SIG_KEY),"certs/signing_key.pem") 53 54keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1 55 56quiet_cmd_gen_key = GENKEY $@ 57 cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \ 58 -batch -x509 -config $< \ 59 -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1 60 61$(obj)/signing_key.pem: $(obj)/x509.genkey FORCE 62 $(call if_changed,gen_key) 63 64targets += signing_key.pem 65 66quiet_cmd_copy_x509_config = COPY $@ 67 cmd_copy_x509_config = cat $(srctree)/$(src)/default_x509.genkey > $@ 68 69# You can provide your own config file. If not present, copy the default one. 70$(obj)/x509.genkey: 71 $(call cmd,copy_x509_config) 72 73endif # CONFIG_MODULE_SIG_KEY 74 75$(eval $(call config_filename,MODULE_SIG_KEY)) 76 77# If CONFIG_MODULE_SIG_KEY isn't a PKCS#11 URI, depend on it 78ifeq ($(patsubst pkcs11:%,%,$(firstword $(MODULE_SIG_KEY_FILENAME))),$(firstword $(MODULE_SIG_KEY_FILENAME))) 79X509_DEP := $(MODULE_SIG_KEY_SRCPREFIX)$(MODULE_SIG_KEY_FILENAME) 80endif 81 82$(obj)/system_certificates.o: $(obj)/signing_key.x509 83 84$(obj)/signing_key.x509: scripts/extract-cert $(X509_DEP) FORCE 85 $(call if_changed,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY)) 86endif # CONFIG_MODULE_SIG 87 88targets += signing_key.x509 89 90ifeq ($(CONFIG_SYSTEM_REVOCATION_LIST),y) 91 92$(eval $(call config_filename,SYSTEM_REVOCATION_KEYS)) 93 94$(obj)/revocation_certificates.o: $(obj)/x509_revocation_list 95 96$(obj)/x509_revocation_list: scripts/extract-cert $(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(SYSTEM_REVOCATION_KEYS_FILENAME) FORCE 97 $(call if_changed,extract_certs,$(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_REVOCATION_KEYS)) 98endif 99 100targets += x509_revocation_list 101