Cose Key
constructor(type: CoseKeyType, keyId: ByteArray? = null, algorithm: CoseAlgorithm? = null, operations: Array<CoseKeyOperation>? = null, baseIv: ByteArray? = null, curve: CoseEllipticCurve? = null, x: ByteArray? = null, y: ByteArray? = null, d: ByteArray? = null)