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Subject[PATCH 2/9] keys: update the description with info about "logon" keys
From: Jeff Layton <>

Signed-off-by: Jeff Layton <>
Signed-off-by: David Howells <>

Documentation/security/keys.txt | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt
index 7877170..4c8cf36 100644
--- a/Documentation/security/keys.txt
+++ b/Documentation/security/keys.txt
@@ -123,7 +123,7 @@ KEY SERVICE OVERVIEW

The key service provides a number of features besides keys:

- (*) The key service defines two special key types:
+ (*) The key service defines three special key types:

(+) "keyring"

@@ -137,6 +137,19 @@ The key service provides a number of features besides keys:
blobs of data. These can be created, updated and read by userspace,
and aren't intended for use by kernel services.

+ (+) "logon"
+ Like a "user" key, a "logon" key has a payload that is an arbitrary
+ blob of data. It is intended as a place to store secrets that the
+ to which the kernel should have access but that should not be
+ accessable from userspace.
+ The description can be arbitrary, but must be prefixed with a non-zero
+ length string that describes the key "subclass". The subclass is
+ separated from the rest of the description by a ':'. "logon" keys can
+ be created and updated by userspace, but the payload is only readable
+ from kernel space.
(*) Each process subscribes to three keyrings: a thread-specific keyring, a
process-specific keyring, and a session-specific keyring.

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