This table can be used for 2 purposes:
1) Importing public/private key pair to serve as the device key when acting
as SSH client. This is done by setting entries to this table, according to
the specified format. When the last entry (footer) is set, the whole key
pair is checked and if valid, stored in CDB.
2) Exporting the device SSH client public/private key. This can be done by
performing GetNext operations on this table.