}
}

var generateKeyTests = []struct {
	ExtKey     [32]byte
	Random     io.Reader
	ShouldPass bool
}{
	{ExtKey: [32]byte{}, Random: nil, ShouldPass: true},              // 0
	{ExtKey: [32]byte{}, Random: rand.Reader, ShouldPass: true},      // 1
	{ExtKey: [32]byte{}, Random: shortRandom(32), ShouldPass: true},  // 2
	{ExtKey: [32]byte{}, Random: shortRandom(31), ShouldPass: false}, // 3
}

// domain (SSE-C or SSE-S3).
func (key ObjectKey) Seal(extKey []byte, iv [32]byte, domain, bucket, object string) SealedKey {
	if len(extKey) != 32 {
		logger.CriticalIf(context.Background(), errors.New("crypto: invalid key length"))
	}
	var (
		sealingKey   [32]byte
		encryptedKey bytes.Buffer
	)
	mac := hmac.New(sha256.New, extKey)
	mac.Write(iv[:])
	mac.Write([]byte(domain))
	mac.Write([]byte(SealAlgorithm))