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Technical Details: FreeOTFE Critical Data Block (CDB) Layout (CDB Format ID 4)

CDB layout format 4 is identical to CDB layout format 3, with the one exception that the Master key stored within the Volume details block may include multiple keys, one after the other

For example:

In all cases, the Master key length will indicate the total length of all keys. It is the responsibility of the cypher driver to determine how the key material is used.

FreeOTFE v3.0 (and later) and FreeOTFE4PDA v3.0 (and later) create volumes using this layout.