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Diffstat (limited to '')
| -rw-r--r-- | certs/Makefile | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/certs/Makefile b/certs/Makefile new file mode 100644 index 000000000..799ad7b9e --- /dev/null +++ b/certs/Makefile @@ -0,0 +1,88 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the linux kernel signature checking certificates. +# + +obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o +obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o blacklist_hashes.o +obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o + +$(obj)/blacklist_hashes.o: $(obj)/blacklist_hash_list +CFLAGS_blacklist_hashes.o := -I $(obj) + +quiet_cmd_check_and_copy_blacklist_hash_list = GEN $@ + cmd_check_and_copy_blacklist_hash_list = \ + $(if $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST), \ + $(AWK) -f $(srctree)/$(src)/check-blacklist-hashes.awk $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) >&2; \ + { cat $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST); echo $(comma) NULL; } > $@, \ + echo NULL > $@) + +$(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) FORCE + $(call if_changed,check_and_copy_blacklist_hash_list) + +targets += blacklist_hash_list + +quiet_cmd_extract_certs = CERT $@ + cmd_extract_certs = $(obj)/extract-cert "$(extract-cert-in)" $@ +extract-cert-in = $(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 + $(call if_changed,extract_certs) + +targets += x509_certificate_list + +# If module signing is requested, say by allyesconfig, but a key has not been +# supplied, then one will need to be generated to make sure the build does not +# fail and that the kernel may be used afterwards. +# +# We do it this way rather than having a boolean option for enabling an +# external private key, because 'make randconfig' might enable such a +# boolean option and we unfortunately can't make it depend on !RANDCONFIG. +ifeq ($(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) |