1 # SPDX-License-Identifier: GPL-2.0-only
2 #
3 # Key management configuration
4 #
5
6 config KEYS
7 bool "Enable access key retention supp
8 select ASSOCIATIVE_ARRAY
9 help
10 This option provides support for ret
11 access keys in the kernel.
12
13 It also includes provision of method
14 associated with a process so that ne
15 support and the like can find them.
16
17 Furthermore, a special type of key i
18 a searchable sequence of keys. Each
19 to five standard keyrings: UID-speci
20 process and thread.
21
22 If you are unsure as to whether this
23
24 config KEYS_REQUEST_CACHE
25 bool "Enable temporary caching of the
26 depends on KEYS
27 help
28 This option causes the result of the
29 call that didn't upcall to the kerne
30 task_struct. The cache is cleared b
31 resumption of userspace.
32
33 This allows the key used for multipl
34 wants to request a key that is likel
35 by the last step to save on the sear
36
37 An example of such a process is a pa
38 filesystem in which each method need
39 key. Pathwalk will call multiple me
40 (permission, d_revalidate, lookup, g
41
42 config PERSISTENT_KEYRINGS
43 bool "Enable register of persistent pe
44 depends on KEYS
45 help
46 This option provides a register of p
47 primarily aimed at Kerberos key stor
48 in the sense that they stay around a
49 have exited, not that they survive t
50
51 A particular keyring may be accessed
52 it is or by a process with administr
53 LSMs gets to rule on which admin-lev
54 cache.
55
56 Keyrings are created and added into
57 removed if they expire (a default ti
58
59 config BIG_KEYS
60 bool "Large payload keys"
61 depends on KEYS
62 depends on TMPFS
63 depends on CRYPTO_LIB_CHACHA20POLY1305
64 help
65 This option provides support for hol
66 (for example Kerberos ticket caches)
67 swapspace by tmpfs.
68
69 If you are unsure as to whether this
70
71 config TRUSTED_KEYS
72 tristate "TRUSTED KEYS"
73 depends on KEYS
74 help
75 This option provides support for cre
76 keys in the kernel. Trusted keys are
77 generated and sealed by a trust sour
78 Userspace will only ever see encrypt
79
80 If you are unsure as to whether this
81
82 if TRUSTED_KEYS
83 source "security/keys/trusted-keys/Kconfig"
84 endif
85
86 config ENCRYPTED_KEYS
87 tristate "ENCRYPTED KEYS"
88 depends on KEYS
89 select CRYPTO
90 select CRYPTO_HMAC
91 select CRYPTO_AES
92 select CRYPTO_CBC
93 select CRYPTO_SHA256
94 select CRYPTO_RNG
95 help
96 This option provides support for cre
97 in the kernel. Encrypted keys are i
98 generated random numbers or provided
99 encrypted/decrypted with a 'master'
100 key can be either a trusted-key or u
101 blobs are ever output to Userspace.
102
103 If you are unsure as to whether this
104
105 config USER_DECRYPTED_DATA
106 bool "Allow encrypted keys with user d
107 depends on ENCRYPTED_KEYS
108 help
109 This option provides support for ins
110 user-provided decrypted data. The d
111 encoded.
112
113 If you are unsure as to whether this
114
115 config KEY_DH_OPERATIONS
116 bool "Diffie-Hellman operations on reta
117 depends on KEYS
118 select CRYPTO
119 select CRYPTO_KDF800108_CTR
120 select CRYPTO_DH
121 help
122 This option provides support for calc
123 public keys and shared secrets using
124 in the kernel.
125
126 If you are unsure as to whether this
127
128 config KEY_NOTIFICATIONS
129 bool "Provide key/keyring change notif
130 depends on KEYS && WATCH_QUEUE
131 help
132 This option provides support for get
133 on keys and keyrings on which the ca
134 This makes use of pipes to handle th
135 provides KEYCTL_WATCH_KEY to enable/
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