107 lines
4.1 KiB
Makefile
107 lines
4.1 KiB
Makefile
|
# 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
|
||
|
|
ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),"")
|
||
|
|
obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
|
||
|
|
else
|
||
|
|
obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o
|
||
|
|
endif
|
||
|
|
|
||
|
|
ifeq ($(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
|
||
|
|
|
||
|
|
# Cope with signing_key.x509 existing in $(srctree) not $(objtree)
|
||
|
|
AFLAGS_system_certificates.o := -I$(srctree)
|
||
|
|
|
||
|
|
quiet_cmd_extract_certs = EXTRACT_CERTS $(patsubst "%",%,$(2))
|
||
|
|
cmd_extract_certs = scripts/extract-cert $(2) $@ || ( rm $@; exit 1)
|
||
|
|
|
||
|
|
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)$(CONFIG_SYSTEM_TRUSTED_KEYS))
|
||
|
|
endif # CONFIG_SYSTEM_TRUSTED_KEYRING
|
||
|
|
|
||
|
|
clean-files := x509_certificate_list .x509.list
|
||
|
|
|
||
|
|
ifeq ($(CONFIG_MODULE_SIG),y)
|
||
|
|
###############################################################################
|
||
|
|
#
|
||
|
|
# 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.
|
||
|
|
#
|
||
|
|
###############################################################################
|
||
|
|
ifndef CONFIG_MODULE_SIG_HASH
|
||
|
|
$(error Could not determine digest type to use from kernel config)
|
||
|
|
endif
|
||
|
|
|
||
|
|
redirect_openssl = 2>&1
|
||
|
|
quiet_redirect_openssl = 2>&1
|
||
|
|
silent_redirect_openssl = 2>/dev/null
|
||
|
|
|
||
|
|
# We do it this way rather than having a boolean option for enabling an
|
||
|
|
# external private key, because 'make randconfig' might enable such a
|
||
|
|
# boolean option and we unfortunately can't make it depend on !RANDCONFIG.
|
||
|
|
ifeq ($(CONFIG_MODULE_SIG_KEY),"certs/signing_key.pem")
|
||
|
|
$(obj)/signing_key.pem: $(obj)/x509.genkey
|
||
|
|
@$(kecho) "###"
|
||
|
|
@$(kecho) "### Now generating an X.509 key pair to be used for signing modules."
|
||
|
|
@$(kecho) "###"
|
||
|
|
@$(kecho) "### If this takes a long time, you might wish to run rngd in the"
|
||
|
|
@$(kecho) "### background to keep the supply of entropy topped up. It"
|
||
|
|
@$(kecho) "### needs to be run as root, and uses a hardware random"
|
||
|
|
@$(kecho) "### number generator if one is available."
|
||
|
|
@$(kecho) "###"
|
||
|
|
$(Q)openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
|
||
|
|
-batch -x509 -config $(obj)/x509.genkey \
|
||
|
|
-outform PEM -out $(obj)/signing_key.pem \
|
||
|
|
-keyout $(obj)/signing_key.pem \
|
||
|
|
$($(quiet)redirect_openssl)
|
||
|
|
@$(kecho) "###"
|
||
|
|
@$(kecho) "### Key pair generated."
|
||
|
|
@$(kecho) "###"
|
||
|
|
|
||
|
|
$(obj)/x509.genkey:
|
||
|
|
@$(kecho) Generating X.509 key generation config
|
||
|
|
@echo >$@ "[ req ]"
|
||
|
|
@echo >>$@ "default_bits = 4096"
|
||
|
|
@echo >>$@ "distinguished_name = req_distinguished_name"
|
||
|
|
@echo >>$@ "prompt = no"
|
||
|
|
@echo >>$@ "string_mask = utf8only"
|
||
|
|
@echo >>$@ "x509_extensions = myexts"
|
||
|
|
@echo >>$@
|
||
|
|
@echo >>$@ "[ req_distinguished_name ]"
|
||
|
|
@echo >>$@ "#O = Unspecified company"
|
||
|
|
@echo >>$@ "CN = Build time autogenerated kernel key"
|
||
|
|
@echo >>$@ "#emailAddress = unspecified.user@unspecified.company"
|
||
|
|
@echo >>$@
|
||
|
|
@echo >>$@ "[ myexts ]"
|
||
|
|
@echo >>$@ "basicConstraints=critical,CA:FALSE"
|
||
|
|
@echo >>$@ "keyUsage=digitalSignature"
|
||
|
|
@echo >>$@ "subjectKeyIdentifier=hash"
|
||
|
|
@echo >>$@ "authorityKeyIdentifier=keyid"
|
||
|
|
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
|