Keyfile ::= SEQUENCE {
	EncryptedFlag	BOOLEAN,
	Credentials ::= SEQUENCE {
		Username	IA5STRING,
		EcdsaSig	OCTET STRING
	}
}


KeyfileEncrypted ::= SEQUENCE {
	EncryptedFlag	BOOLEAN,
	KDFSalt		OCTET STRING,
	EncryptedData	OCTET STRING
};