2 # Key management configuration
6 bool "Enable access key retention support"
8 This option provides support for retaining authentication tokens and
9 access keys in the kernel.
11 It also includes provision of methods by which such keys might be
12 associated with a process so that network filesystems, encryption
13 support and the like can find them.
15 Furthermore, a special type of key is available that acts as keyring:
16 a searchable sequence of keys. Each process is equipped with access
17 to five standard keyrings: UID-specific, GID-specific, session,
20 If you are unsure as to whether this is required, answer N.
23 tristate "TRUSTED KEYS"
24 depends on KEYS && TCG_TPM
29 This option provides support for creating, sealing, and unsealing
30 keys in the kernel. Trusted keys are random number symmetric keys,
31 generated and RSA-sealed by the TPM. The TPM only unseals the keys,
32 if the boot PCRs and other criteria match. Userspace will only ever
35 If you are unsure as to whether this is required, answer N.
38 tristate "ENCRYPTED KEYS"
47 This option provides support for create/encrypting/decrypting keys
48 in the kernel. Encrypted keys are kernel generated random numbers,
49 which are encrypted/decrypted with a 'master' symmetric key. The
50 'master' key can be either a trusted-key or user-key type.
51 Userspace only ever sees/stores encrypted blobs.
53 If you are unsure as to whether this is required, answer N.
55 config KEYS_DEBUG_PROC_KEYS
56 bool "Enable the /proc/keys file by which keys may be viewed"
59 This option turns on support for the /proc/keys file - through which
60 can be listed all the keys on the system that are viewable by the
63 The only keys included in the list are those that grant View
64 permission to the reading process whether or not it possesses them.
65 Note that LSM security checks are still performed, and may further
66 filter out keys that the current process is not authorised to view.
68 Only key attributes are listed here; key payloads are not included in
71 If you are unsure as to whether this is required, answer N.