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David Howellscfc411e2015-08-14 15:20:41 +01001menu "Certificates for signature checking"
2
3config MODULE_SIG_KEY
4 string "File name or PKCS#11 URI of module signing key"
5 default "certs/signing_key.pem"
6 depends on MODULE_SIG
7 help
8 Provide the file name of a private key/certificate in PEM format,
9 or a PKCS#11 URI according to RFC7512. The file should contain, or
10 the URI should identify, both the certificate and its corresponding
11 private key.
12
13 If this option is unchanged from its default "certs/signing_key.pem",
14 then the kernel will automatically generate the private key and
15 certificate as described in Documentation/module-signing.txt
16
17config SYSTEM_TRUSTED_KEYRING
18 bool "Provide system-wide ring of trusted keys"
19 depends on KEYS
David Howells99716b72016-04-06 16:14:26 +010020 depends on ASYMMETRIC_KEY_TYPE
David Howellscfc411e2015-08-14 15:20:41 +010021 help
22 Provide a system keyring to which trusted keys can be added. Keys in
23 the keyring are considered to be trusted. Keys may be added at will
24 by the kernel from compiled-in data and from hardware key stores, but
25 userspace may only add extra keys if those keys can be verified by
26 keys already in the keyring.
27
28 Keys in this keyring are used by module signature checking.
29
30config SYSTEM_TRUSTED_KEYS
31 string "Additional X.509 keys for default system keyring"
32 depends on SYSTEM_TRUSTED_KEYRING
33 help
34 If set, this option should be the filename of a PEM-formatted file
35 containing trusted X.509 certificates to be included in the default
36 system keyring. Any certificate used for module signing is implicitly
37 also trusted.
38
39 NOTE: If you previously provided keys for the system keyring in the
40 form of DER-encoded *.x509 files in the top-level build directory,
41 those are no longer used. You will need to set this option instead.
42
Mehmet Kayaalpc4c36102015-11-24 16:18:05 -050043config SYSTEM_EXTRA_CERTIFICATE
44 bool "Reserve area for inserting a certificate without recompiling"
45 depends on SYSTEM_TRUSTED_KEYRING
46 help
47 If set, space for an extra certificate will be reserved in the kernel
48 image. This allows introducing a trusted certificate to the default
49 system keyring without recompiling the kernel.
50
51config SYSTEM_EXTRA_CERTIFICATE_SIZE
52 int "Number of bytes to reserve for the extra certificate"
53 depends on SYSTEM_EXTRA_CERTIFICATE
54 default 4096
55 help
56 This is the number of bytes reserved in the kernel image for a
57 certificate to be inserted.
58
David Howellsd3bfe842016-04-06 16:14:27 +010059config SECONDARY_TRUSTED_KEYRING
60 bool "Provide a keyring to which extra trustable keys may be added"
61 depends on SYSTEM_TRUSTED_KEYRING
62 help
63 If set, provide a keyring to which extra keys may be added, provided
64 those keys are not blacklisted and are vouched for by a key built
65 into the kernel or already in the secondary trusted keyring.
66
David Howells734114f2017-04-03 16:07:24 +010067config SYSTEM_BLACKLIST_KEYRING
68 bool "Provide system-wide ring of blacklisted keys"
69 depends on KEYS
70 help
71 Provide a system keyring to which blacklisted keys can be added.
72 Keys in the keyring are considered entirely untrusted. Keys in this
73 keyring are used by the module signature checking to reject loading
74 of modules signed with a blacklisted key.
75
76config SYSTEM_BLACKLIST_HASH_LIST
77 string "Hashes to be preloaded into the system blacklist keyring"
78 depends on SYSTEM_BLACKLIST_KEYRING
79 help
80 If set, this option should be the filename of a list of hashes in the
81 form "<hash>", "<hash>", ... . This will be included into a C
82 wrapper to incorporate the list into the kernel. Each <hash> should
83 be a string of hex digits.
84
David Howellscfc411e2015-08-14 15:20:41 +010085endmenu