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 $(call config_filename,SYSTEM_TRUSTED_KEYS)) 21 22# GCC doesn't include .incbin files in -MD generated dependencies (PR#66871) 23$(obj)/system_certificates.o: $(obj)/x509_certificate_list 24 25$(obj)/x509_certificate_list: scripts/extract-cert $(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(SYSTEM_TRUSTED_KEYS_FILENAME) FORCE 26 $(call if_changed,extract_certs,$(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_TRUSTED_KEYS)) 27endif # CONFIG_SYSTEM_TRUSTED_KEYRING 28 29targets += x509_certificate_list 30 31ifeq ($(CONFIG_MODULE_SIG),y) 32 SIGN_KEY = y 33endif 34 35ifeq ($(CONFIG_IMA_APPRAISE_MODSIG),y) 36ifeq ($(CONFIG_MODULES),y) 37 SIGN_KEY = y 38endif 39endif 40 41ifdef SIGN_KEY 42############################################################################### 43# 44# If module signing is requested, say by allyesconfig, but a key has not been 45# supplied, then one will need to be generated to make sure the build does not 46# fail and that the kernel may be used afterwards. 47# 48############################################################################### 49 50# We do it this way rather than having a boolean option for enabling an 51# external private key, because 'make randconfig' might enable such a 52# boolean option and we unfortunately can't make it depend on !RANDCONFIG. 53ifeq ($(CONFIG_MODULE_SIG_KEY),"certs/signing_key.pem") 54 55keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1 56 57quiet_cmd_gen_key = GENKEY $@ 58 cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \ 59 -batch -x509 -config $< \ 60 -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1 61 62$(obj)/signing_key.pem: $(obj)/x509.genkey FORCE 63 $(call if_changed,gen_key) 64 65targets += signing_key.pem 66 67quiet_cmd_copy_x509_config = COPY $@ 68 cmd_copy_x509_config = cat $(srctree)/$(src)/default_x509.genkey > $@ 69 70# You can provide your own config file. If not present, copy the default one. 71$(obj)/x509.genkey: 72 $(call cmd,copy_x509_config) 73 74endif # CONFIG_MODULE_SIG_KEY 75 76$(eval $(call config_filename,MODULE_SIG_KEY)) 77 78# If CONFIG_MODULE_SIG_KEY isn't a PKCS#11 URI, depend on it 79ifeq ($(patsubst pkcs11:%,%,$(firstword $(MODULE_SIG_KEY_FILENAME))),$(firstword $(MODULE_SIG_KEY_FILENAME))) 80X509_DEP := $(MODULE_SIG_KEY_SRCPREFIX)$(MODULE_SIG_KEY_FILENAME) 81endif 82 83# GCC PR#66871 again. 84$(obj)/system_certificates.o: $(obj)/signing_key.x509 85 86$(obj)/signing_key.x509: scripts/extract-cert $(X509_DEP) FORCE 87 $(call if_changed,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY)) 88endif # CONFIG_MODULE_SIG 89 90targets += signing_key.x509 91 92ifeq ($(CONFIG_SYSTEM_REVOCATION_LIST),y) 93 94$(eval $(call config_filename,SYSTEM_REVOCATION_KEYS)) 95 96$(obj)/revocation_certificates.o: $(obj)/x509_revocation_list 97 98$(obj)/x509_revocation_list: scripts/extract-cert $(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(SYSTEM_REVOCATION_KEYS_FILENAME) FORCE 99 $(call if_changed,extract_certs,$(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_REVOCATION_KEYS)) 100endif 101 102targets += x509_revocation_list 103