1 menu "Certificates for signature checking"
4 string "File name or PKCS#11 URI of module signing key"
5 default "certs/signing_key.pem"
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
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
17 config SYSTEM_TRUSTED_KEYRING
18 bool "Provide system-wide ring of trusted keys"
20 depends on ASYMMETRIC_KEY_TYPE
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.
28 Keys in this keyring are used by module signature checking.
30 config SYSTEM_TRUSTED_KEYS
31 string "Additional X.509 keys for default system keyring"
32 depends on SYSTEM_TRUSTED_KEYRING
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
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.
43 config SYSTEM_EXTRA_CERTIFICATE
44 bool "Reserve area for inserting a certificate without recompiling"
45 depends on SYSTEM_TRUSTED_KEYRING
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.
51 config SYSTEM_EXTRA_CERTIFICATE_SIZE
52 int "Number of bytes to reserve for the extra certificate"
53 depends on SYSTEM_EXTRA_CERTIFICATE
56 This is the number of bytes reserved in the kernel image for a
57 certificate to be inserted.
59 config SECONDARY_TRUSTED_KEYRING
60 bool "Provide a keyring to which extra trustable keys may be added"
61 depends on SYSTEM_TRUSTED_KEYRING
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.