| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # Makefile for the linux kernel signature checking certificates. |
| # |
| |
| obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o |
| obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o |
| obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o |
| ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),"") |
| obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o |
| else |
| obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o |
| endif |
| |
| quiet_cmd_extract_certs = CERT $@ |
| cmd_extract_certs = scripts/extract-cert $(2) $@ |
| |
| ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y) |
| |
| $(eval $(call config_filename,SYSTEM_TRUSTED_KEYS)) |
| |
| # GCC doesn't include .incbin files in -MD generated dependencies (PR#66871) |
| $(obj)/system_certificates.o: $(obj)/x509_certificate_list |
| |
| targets += x509_certificate_list |
| $(obj)/x509_certificate_list: scripts/extract-cert $(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(SYSTEM_TRUSTED_KEYS_FILENAME) FORCE |
| $(call if_changed,extract_certs,$(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_TRUSTED_KEYS)) |
| endif # CONFIG_SYSTEM_TRUSTED_KEYRING |
| |
| clean-files := x509_certificate_list .x509.list x509_revocation_list |
| |
| ifeq ($(CONFIG_MODULE_SIG),y) |
| SIGN_KEY = y |
| endif |
| |
| ifeq ($(CONFIG_IMA_APPRAISE_MODSIG),y) |
| ifeq ($(CONFIG_MODULES),y) |
| SIGN_KEY = y |
| endif |
| endif |
| |
| ifdef SIGN_KEY |
| ############################################################################### |
| # |
| # If module signing is requested, say by allyesconfig, but a key has not been |
| # supplied, then one will need to be generated to make sure the build does not |
| # fail and that the kernel may be used afterwards. |
| # |
| ############################################################################### |
| |
| # We do it this way rather than having a boolean option for enabling an |
| # external private key, because 'make randconfig' might enable such a |
| # boolean option and we unfortunately can't make it depend on !RANDCONFIG. |
| ifeq ($(CONFIG_MODULE_SIG_KEY),"certs/signing_key.pem") |
| |
| keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1 |
| |
| quiet_cmd_gen_key = GENKEY $@ |
| cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \ |
| -batch -x509 -config $< \ |
| -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1 |
| |
| $(obj)/signing_key.pem: $(obj)/x509.genkey FORCE |
| $(call if_changed,gen_key) |
| |
| targets += signing_key.pem |
| |
| quiet_cmd_copy_x509_config = COPY $@ |
| cmd_copy_x509_config = cat $(srctree)/$(src)/default_x509.genkey > $@ |
| |
| # You can provide your own config file. If not present, copy the default one. |
| $(obj)/x509.genkey: |
| $(call cmd,copy_x509_config) |
| |
| endif # CONFIG_MODULE_SIG_KEY |
| |
| $(eval $(call config_filename,MODULE_SIG_KEY)) |
| |
| # If CONFIG_MODULE_SIG_KEY isn't a PKCS#11 URI, depend on it |
| ifeq ($(patsubst pkcs11:%,%,$(firstword $(MODULE_SIG_KEY_FILENAME))),$(firstword $(MODULE_SIG_KEY_FILENAME))) |
| X509_DEP := $(MODULE_SIG_KEY_SRCPREFIX)$(MODULE_SIG_KEY_FILENAME) |
| endif |
| |
| # GCC PR#66871 again. |
| $(obj)/system_certificates.o: $(obj)/signing_key.x509 |
| |
| targets += signing_key.x509 |
| $(obj)/signing_key.x509: scripts/extract-cert $(X509_DEP) FORCE |
| $(call if_changed,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY)) |
| endif # CONFIG_MODULE_SIG |
| |
| ifeq ($(CONFIG_SYSTEM_REVOCATION_LIST),y) |
| |
| $(eval $(call config_filename,SYSTEM_REVOCATION_KEYS)) |
| |
| $(obj)/revocation_certificates.o: $(obj)/x509_revocation_list |
| |
| targets += x509_revocation_list |
| $(obj)/x509_revocation_list: scripts/extract-cert $(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(SYSTEM_REVOCATION_KEYS_FILENAME) FORCE |
| $(call if_changed,extract_certs,$(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_REVOCATION_KEYS)) |
| endif |