OSCL-LXR

0001 # SPDX-License-Identifier: GPL-2.0
0002 #
0003 # Makefile for the linux kernel signature checking certificates.
0004 #
0005
0006 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
0007 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o blacklist_hashes.o
0008 obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
0009
0010 $(obj)/blacklist_hashes.o: $(obj)/blacklist_hash_list
0011 CFLAGS_blacklist_hashes.o := -I $(obj)
0012
0013 quiet_cmd_check_and_copy_blacklist_hash_list = GEN     $@
0014       cmd_check_and_copy_blacklist_hash_list = \
0015         $(if $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST), \
0016         $(AWK) -f $(srctree)/$(src)/check-blacklist-hashes.awk $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) >&2; \
0017         { cat $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST); echo $(comma) NULL; } > $@, \
0018         echo NULL > $@)
0019
0020 $(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) FORCE
0021         $(call if_changed,check_and_copy_blacklist_hash_list)
0022
0023 targets += blacklist_hash_list
0024
0025 quiet_cmd_extract_certs  = CERT    $@
0026       cmd_extract_certs  = $(obj)/extract-cert $(extract-cert-in) $@
0027 extract-cert-in = $(or $(filter-out $(obj)/extract-cert, $(real-prereqs)),"")
0028
0029 $(obj)/system_certificates.o: $(obj)/x509_certificate_list
0030
0031 $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE
0032         $(call if_changed,extract_certs)
0033
0034 targets += x509_certificate_list
0035
0036 # If module signing is requested, say by allyesconfig, but a key has not been
0037 # supplied, then one will need to be generated to make sure the build does not
0038 # fail and that the kernel may be used afterwards.
0039 #
0040 # We do it this way rather than having a boolean option for enabling an
0041 # external private key, because 'make randconfig' might enable such a
0042 # boolean option and we unfortunately can't make it depend on !RANDCONFIG.
0043 ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_key.pem)
0044
0045 keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1
0046
0047 quiet_cmd_gen_key = GENKEY  $@
0048       cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
0049                 -batch -x509 -config $< \
0050                 -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1
0051
0052 $(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
0053         $(call if_changed,gen_key)
0054
0055 targets += signing_key.pem
0056
0057 quiet_cmd_copy_x509_config = COPY    $@
0058       cmd_copy_x509_config = cat $(srctree)/$(src)/default_x509.genkey > $@
0059
0060 # You can provide your own config file. If not present, copy the default one.
0061 $(obj)/x509.genkey:
0062         $(call cmd,copy_x509_config)
0063
0064 endif # CONFIG_MODULE_SIG_KEY
0065
0066 $(obj)/system_certificates.o: $(obj)/signing_key.x509
0067
0068 PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY))
0069 ifdef PKCS11_URI
0070 $(obj)/signing_key.x509: extract-cert-in := $(PKCS11_URI)
0071 endif
0072
0073 $(obj)/signing_key.x509: $(filter-out $(PKCS11_URI),$(CONFIG_MODULE_SIG_KEY)) $(obj)/extract-cert FORCE
0074         $(call if_changed,extract_certs)
0075
0076 targets += signing_key.x509
0077
0078 $(obj)/revocation_certificates.o: $(obj)/x509_revocation_list
0079
0080 $(obj)/x509_revocation_list: $(CONFIG_SYSTEM_REVOCATION_KEYS) $(obj)/extract-cert FORCE
0081         $(call if_changed,extract_certs)
0082
0083 targets += x509_revocation_list
0084
0085 hostprogs := extract-cert
0086
0087 HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null)
0088 HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)