Enum KeyLookup 

pub enum KeyLookup {
    Absent,
    Unavailable(Unavailable),
    Found(KeyFile),
}

What the named key file turned out to be.

Variants

Absent

No file is named.

Unavailable(Unavailable)

A named file this runtime cannot reach: a path that does not exist here, or a file it may not open or read. Under a read-only check that is an observation boundary, not a defect: the file can exist on the host that named it and be absent from a container.

Found(KeyFile)

A readable, owner-only PEM private key.