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keys-encrypted: add nvdimm key format type to encrypted keys

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Adding nvdimm key format type to encrypted keys in order to limit the size
of the key to 32bytes.

Signed-off-by: Dave Jiang <[email protected]>
Acked-by: Mimi Zohar <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Dave Jiang 2018-12-04 10:31:33 -08:00 • committed by Dan Williams
commit 9db67581b9
2 changed files with 25 additions and 10 deletions
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6
Documentation/security/keys/trusted-encrypted.rst
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@ -76,7 +76,7 @@ Usage::
Where::
format:= 'default | ecryptfs'
format:= 'default | ecryptfs | enc32'
key-type:= 'trusted' | 'user'
@ -173,3 +173,7 @@ are anticipated. In particular the new format 'ecryptfs' has been defined in
in order to use encrypted keys to mount an eCryptfs filesystem. More details
about the usage can be found in the file
``Documentation/security/keys/ecryptfs.rst``.
Another new format 'enc32' has been defined in order to support encrypted keys
with payload size of 32 bytes. This will initially be used for nvdimm security
but may expand to other usages that require 32 bytes payload.