| # 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),) |
| quiet_cmd_check_blacklist_hashes = CHECK $(patsubst "%",%,$(2)) |
| cmd_check_blacklist_hashes = $(AWK) -f $(srctree)/scripts/check-blacklist-hashes.awk $(2); touch $@ |
| |
| $(eval $(call config_filename,SYSTEM_BLACKLIST_HASH_LIST)) |
| |
| $(obj)/blacklist_hashes.o: $(obj)/blacklist_hashes_checked |
| |
| CFLAGS_blacklist_hashes.o += -I$(srctree) |
| |
| targets += blacklist_hashes_checked |
| $(obj)/blacklist_hashes_checked: $(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(SYSTEM_BLACKLIST_HASH_LIST_FILENAME) scripts/check-blacklist-hashes.awk FORCE |
| $(call if_changed,check_blacklist_hashes,$(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(CONFIG_SYSTEM_BLACKLIST_HASH_LIST)) |
| obj-$(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 = $(obj)/extract-cert $(extract-cert-in) $@ |
| extract-cert-in = $(or $(filter-out $(obj)/extract-cert, $(real-prereqs)),"") |
| |
| $(obj)/system_certificates.o: $(obj)/x509_certificate_list |
| |
| $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE |
| $(call if_changed,extract_certs) |
| |
| targets += x509_certificate_list blacklist_hashes_checked |
| |
| # If module signing is requested, say by allyesconfig, but a key has not been |
| # supplied, then one will need to be generated to make sure the build does not |
| # fail and that the kernel may be used afterwards. |
| # |
| # We do it this way rather than having a boolean option for enabling an |
| # external private key, because 'make randconfig' might enable such a |
| # boolean option and we unfortunately can't make it depend on !RANDCONFIG. |
| ifeq ($(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 |
| |
| $(obj)/system_certificates.o: $(obj)/signing_key.x509 |
| |
| PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY)) |
| ifdef PKCS11_URI |
| $(obj)/signing_key.x509: extract-cert-in := $(PKCS11_URI) |
| endif |
| |
| $(obj)/signing_key.x509: $(filter-out $(PKCS11_URI),$(CONFIG_MODULE_SIG_KEY)) $(obj)/extract-cert FORCE |
| $(call if_changed,extract_certs) |
| |
| targets += signing_key.x509 |
| |
| $(obj)/revocation_certificates.o: $(obj)/x509_revocation_list |
| |
| $(obj)/x509_revocation_list: $(CONFIG_SYSTEM_REVOCATION_KEYS) $(obj)/extract-cert FORCE |
| $(call if_changed,extract_certs) |
| |
| targets += x509_revocation_list |
| |
| hostprogs := extract-cert |
| |
| HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null) |
| HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto) |