1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # 2 #
3 # Makefile for the linux kernel signature chec 3 # Makefile for the linux kernel signature checking certificates.
4 # 4 #
5 5
6 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system 6 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
7 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blac !! 7 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o
8 obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revoca 8 obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
>> 9 ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),)
9 10
10 $(obj)/blacklist_hashes.o: $(obj)/blacklist_ha 11 $(obj)/blacklist_hashes.o: $(obj)/blacklist_hash_list
11 CFLAGS_blacklist_hashes.o := -I $(obj) 12 CFLAGS_blacklist_hashes.o := -I $(obj)
12 13
13 quiet_cmd_check_and_copy_blacklist_hash_list = 14 quiet_cmd_check_and_copy_blacklist_hash_list = GEN $@
14 cmd_check_and_copy_blacklist_hash_list = 15 cmd_check_and_copy_blacklist_hash_list = \
15 $(if $(CONFIG_SYSTEM_BLACKLIST_HASH_LI !! 16 $(AWK) -f $(srctree)/scripts/check-blacklist-hashes.awk $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) >&2; \
16 $(AWK) -f $(src)/check-blacklist-hashe !! 17 cat $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) > $@
17 { cat $(CONFIG_SYSTEM_BLACKLIST_HASH_L <<
18 echo NULL > $@) <<
19 18
20 $(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BL 19 $(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) FORCE
21 $(call if_changed,check_and_copy_black 20 $(call if_changed,check_and_copy_blacklist_hash_list)
22 !! 21 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
>> 22 else
>> 23 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o
>> 24 endif
23 targets += blacklist_hash_list 25 targets += blacklist_hash_list
24 26
25 quiet_cmd_extract_certs = CERT $@ 27 quiet_cmd_extract_certs = CERT $@
26 cmd_extract_certs = $(obj)/extract-cert !! 28 cmd_extract_certs = $(obj)/extract-cert $(extract-cert-in) $@
27 extract-cert-in = $(filter-out $(obj)/extract- !! 29 extract-cert-in = $(or $(filter-out $(obj)/extract-cert, $(real-prereqs)),"")
28 30
29 $(obj)/system_certificates.o: $(obj)/x509_cert 31 $(obj)/system_certificates.o: $(obj)/x509_certificate_list
30 32
31 $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_ 33 $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE
32 $(call if_changed,extract_certs) 34 $(call if_changed,extract_certs)
33 35
34 targets += x509_certificate_list 36 targets += x509_certificate_list
35 37
36 # If module signing is requested, say by allye 38 # If module signing is requested, say by allyesconfig, but a key has not been
37 # supplied, then one will need to be generated 39 # supplied, then one will need to be generated to make sure the build does not
38 # fail and that the kernel may be used afterwa 40 # fail and that the kernel may be used afterwards.
39 # 41 #
40 # We do it this way rather than having a boole 42 # We do it this way rather than having a boolean option for enabling an
41 # external private key, because 'make randconf 43 # external private key, because 'make randconfig' might enable such a
42 # boolean option and we unfortunately can't ma 44 # boolean option and we unfortunately can't make it depend on !RANDCONFIG.
43 ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_k 45 ifeq ($(CONFIG_MODULE_SIG_KEY),certs/signing_key.pem)
44 46
45 keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := 47 keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_curve:secp384r1
46 48
47 quiet_cmd_gen_key = GENKEY $@ 49 quiet_cmd_gen_key = GENKEY $@
48 cmd_gen_key = openssl req -new -nodes -u 50 cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
49 -batch -x509 -config $< \ 51 -batch -x509 -config $< \
50 -outform PEM -out $@ -keyout $ 52 -outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1
51 53
52 $(obj)/signing_key.pem: $(obj)/x509.genkey FOR 54 $(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
53 $(call if_changed,gen_key) 55 $(call if_changed,gen_key)
54 56
55 targets += signing_key.pem 57 targets += signing_key.pem
56 58
57 quiet_cmd_copy_x509_config = COPY $@ 59 quiet_cmd_copy_x509_config = COPY $@
58 cmd_copy_x509_config = cat $(src)/defaul !! 60 cmd_copy_x509_config = cat $(srctree)/$(src)/default_x509.genkey > $@
59 61
60 # You can provide your own config file. If not 62 # You can provide your own config file. If not present, copy the default one.
61 $(obj)/x509.genkey: 63 $(obj)/x509.genkey:
62 $(call cmd,copy_x509_config) 64 $(call cmd,copy_x509_config)
63 65
64 endif # CONFIG_MODULE_SIG_KEY 66 endif # CONFIG_MODULE_SIG_KEY
65 67
66 $(obj)/system_certificates.o: $(obj)/signing_k 68 $(obj)/system_certificates.o: $(obj)/signing_key.x509
67 69
68 PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODU 70 PKCS11_URI := $(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY))
69 ifdef PKCS11_URI 71 ifdef PKCS11_URI
70 $(obj)/signing_key.x509: extract-cert-in := $( 72 $(obj)/signing_key.x509: extract-cert-in := $(PKCS11_URI)
71 endif 73 endif
72 74
73 $(obj)/signing_key.x509: $(filter-out $(PKCS11 75 $(obj)/signing_key.x509: $(filter-out $(PKCS11_URI),$(CONFIG_MODULE_SIG_KEY)) $(obj)/extract-cert FORCE
74 $(call if_changed,extract_certs) 76 $(call if_changed,extract_certs)
75 77
76 targets += signing_key.x509 78 targets += signing_key.x509
77 79
78 $(obj)/revocation_certificates.o: $(obj)/x509_ 80 $(obj)/revocation_certificates.o: $(obj)/x509_revocation_list
79 81
80 $(obj)/x509_revocation_list: $(CONFIG_SYSTEM_R 82 $(obj)/x509_revocation_list: $(CONFIG_SYSTEM_REVOCATION_KEYS) $(obj)/extract-cert FORCE
81 $(call if_changed,extract_certs) 83 $(call if_changed,extract_certs)
82 84
83 targets += x509_revocation_list 85 targets += x509_revocation_list
84 86
85 hostprogs := extract-cert 87 hostprogs := extract-cert
86 88
87 HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_ 89 HOSTCFLAGS_extract-cert.o = $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null)
88 HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CO 90 HOSTLDLIBS_extract-cert = $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)
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