Add a keystore implementation that stores secure AES keys in a
key repository, located in a directory, e.g. '/etc/zkey/repository'.
The keystore allows you to generate, validate, re-encipher, modify,
list, delete, etc secure keys.
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>