KEYS: Move the key config into security/keys/Kconfig

Move the key config into security/keys/Kconfig as there are going to be a lot
of key-related options.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Mimi Zohar <zohar@us.ibm.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/security/keys/Kconfig b/security/keys/Kconfig
new file mode 100644
index 00000000000..a90d6d300db
--- /dev/null
+++ b/security/keys/Kconfig
@@ -0,0 +1,71 @@
+#
+# Key management configuration
+#
+
+config KEYS
+        bool "Enable access key retention support"
+        help
+          This option provides support for retaining authentication tokens and
+          access keys in the kernel.
+
+          It also includes provision of methods by which such keys might be
+          associated with a process so that network filesystems, encryption
+          support and the like can find them.
+
+          Furthermore, a special type of key is available that acts as keyring:
+          a searchable sequence of keys. Each process is equipped with access
+          to five standard keyrings: UID-specific, GID-specific, session,
+          process and thread.
+
+          If you are unsure as to whether this is required, answer N.
+
+config TRUSTED_KEYS
+        tristate "TRUSTED KEYS"
+        depends on KEYS && TCG_TPM
+        select CRYPTO
+        select CRYPTO_HMAC
+        select CRYPTO_SHA1
+        help
+          This option provides support for creating, sealing, and unsealing
+          keys in the kernel. Trusted keys are random number symmetric keys,
+          generated and RSA-sealed by the TPM. The TPM only unseals the keys,
+          if the boot PCRs and other criteria match.  Userspace will only ever
+          see encrypted blobs.
+
+          If you are unsure as to whether this is required, answer N.
+
+config ENCRYPTED_KEYS
+        tristate "ENCRYPTED KEYS"
+        depends on KEYS
+        select CRYPTO
+        select CRYPTO_HMAC
+        select CRYPTO_AES
+        select CRYPTO_CBC
+        select CRYPTO_SHA256
+        select CRYPTO_RNG
+        help
+          This option provides support for create/encrypting/decrypting keys
+          in the kernel.  Encrypted keys are kernel generated random numbers,
+          which are encrypted/decrypted with a 'master' symmetric key. The
+          'master' key can be either a trusted-key or user-key type.
+          Userspace only ever sees/stores encrypted blobs.
+
+          If you are unsure as to whether this is required, answer N.
+
+config KEYS_DEBUG_PROC_KEYS
+        bool "Enable the /proc/keys file by which keys may be viewed"
+        depends on KEYS
+        help
+          This option turns on support for the /proc/keys file - through which
+          can be listed all the keys on the system that are viewable by the
+          reading process.
+
+          The only keys included in the list are those that grant View
+          permission to the reading process whether or not it possesses them.
+          Note that LSM security checks are still performed, and may further
+          filter out keys that the current process is not authorised to view.
+
+          Only key attributes are listed here; key payloads are not included in
+          the resulting table.
+
+          If you are unsure as to whether this is required, answer N.