switch sealedKey.Algorithm {
	default:
		return Errorf("The sealing algorithm '%s' is not supported", sealedKey.Algorithm)
	case SealAlgorithm:
		mac := hmac.New(sha256.New, extKey)
		mac.Write(sealedKey.IV[:])
		mac.Write([]byte(domain))
		mac.Write([]byte(SealAlgorithm))
		mac.Write([]byte(path.Join(bucket, object))) // use path.Join for canonical 'bucket/object'

	if sealedKey.Algorithm != SealAlgorithm {
		logger.CriticalIf(context.Background(), Errorf("The seal algorithm '%s' is invalid for SSE-C", sealedKey.Algorithm))
	}

	if metadata == nil {
		metadata = make(map[string]string, 3)
	}
	metadata[MetaAlgorithm] = SealAlgorithm
	metadata[MetaIV] = base64.StdEncoding.EncodeToString(sealedKey.IV[:])

	"net/http"

	"github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/sio"
)

const (
	// SealAlgorithm is the encryption/sealing algorithm used to derive & seal
	// the key-encryption-key and to en/decrypt the object data.
	SealAlgorithm = "DAREv2-HMAC-SHA256"

	// InsecureSealAlgorithm is the legacy encryption/sealing algorithm used

			}
			return crypto.ErrInvalidCustomerKey // To provide strict AWS S3 compatibility we return: access denied.
		}

		if subtle.ConstantTimeCompare(oldKey, newKey) == 1 && sealedKey.Algorithm == crypto.SealAlgorithm {
			return nil // don't rotate on equal keys if seal algorithm is latest
		}
		sealedKey = objectKey.Seal(newKey, sealedKey.IV, crypto.SSEC.String(), bucket, object)
		crypto.SSEC.CreateMetadata(metadata, sealedKey)