2 # Key management configuration
6 bool "Enable access key retention support"
7 select ASSOCIATIVE_ARRAY
9 This option provides support for retaining authentication tokens and
10 access keys in the kernel.
12 It also includes provision of methods by which such keys might be
13 associated with a process so that network filesystems, encryption
14 support and the like can find them.
16 Furthermore, a special type of key is available that acts as keyring:
17 a searchable sequence of keys. Each process is equipped with access
18 to five standard keyrings: UID-specific, GID-specific, session,
21 If you are unsure as to whether this is required, answer N.
24 tristate "Large payload keys"
28 This option provides support for holding large keys within the kernel
29 (for example Kerberos ticket caches). The data may be stored out to
32 If you are unsure as to whether this is required, answer N.
35 tristate "TRUSTED KEYS"
36 depends on KEYS && TCG_TPM
41 This option provides support for creating, sealing, and unsealing
42 keys in the kernel. Trusted keys are random number symmetric keys,
43 generated and RSA-sealed by the TPM. The TPM only unseals the keys,
44 if the boot PCRs and other criteria match. Userspace will only ever
47 If you are unsure as to whether this is required, answer N.
50 tristate "ENCRYPTED KEYS"
59 This option provides support for create/encrypting/decrypting keys
60 in the kernel. Encrypted keys are kernel generated random numbers,
61 which are encrypted/decrypted with a 'master' symmetric key. The
62 'master' key can be either a trusted-key or user-key type.
63 Userspace only ever sees/stores encrypted blobs.
65 If you are unsure as to whether this is required, answer N.
67 config KEYS_DEBUG_PROC_KEYS
68 bool "Enable the /proc/keys file by which keys may be viewed"
71 This option turns on support for the /proc/keys file - through which
72 can be listed all the keys on the system that are viewable by the
75 The only keys included in the list are those that grant View
76 permission to the reading process whether or not it possesses them.
77 Note that LSM security checks are still performed, and may further
78 filter out keys that the current process is not authorised to view.
80 Only key attributes are listed here; key payloads are not included in
83 If you are unsure as to whether this is required, answer N.