diff --git a/commands/constructors.go b/commands/constructors.go
index 5ec39b7..887393f 100644
--- a/commands/constructors.go
+++ b/commands/constructors.go
@@ -9,7 +9,6 @@ import (
 	"github.com/certusone/yubihsm-go/authkey"
 )
 
-
 func CreateDeviceInfoCommand() (*CommandMessage, error) {
 	command := &CommandMessage{
 		CommandType: CommandTypeDeviceInfo,
@@ -117,6 +116,20 @@ func CreateSignDataPkcs1Command(keyID uint16, data []byte) (*CommandMessage, err
 	return command, nil
 }
 
+func CreateHMACDataCommand(keyID uint16, data []byte) (*CommandMessage, error) {
+	command := &CommandMessage{
+		CommandType: CommandTypeHMACData,
+	}
+
+	payload := bytes.NewBuffer([]byte{})
+	binary.Write(payload, binary.BigEndian, keyID)
+	payload.Write(data)
+
+	command.Data = payload.Bytes()
+
+	return command, nil
+}
+
 func CreatePutAsymmetricKeyCommand(keyID uint16, label []byte, domains uint16, capabilities uint64, algorithm Algorithm, keyPart1 []byte, keyPart2 []byte) (*CommandMessage, error) {
 	if len(label) > LabelLength {
 		return nil, errors.New("label is too long")
diff --git a/commands/response.go b/commands/response.go
index f8f1a2e..476c566 100644
--- a/commands/response.go
+++ b/commands/response.go
@@ -76,6 +76,10 @@ type (
 		Signature []byte
 	}
 
+	HMACDataResponse struct {
+		Data []byte
+	}
+
 	SignDataEcdsaResponse struct {
 		Signature []byte
 	}
@@ -185,6 +189,8 @@ func ParseResponse(data []byte) (Response, error) {
 		return parseSignDataEcdsaResponse(payload)
 	case CommandTypeSignDataPkcs1:
 		return parseSignDataPkcs1Response(payload)
+	case CommandTypeHMACData:
+		return parseHMACDataResponse(payload)
 	case CommandTypePutAsymmetric:
 		return parsePutAsymmetricKeyResponse(payload)
 	case CommandTypeListObjects:
@@ -314,6 +320,16 @@ func parseSignDataPkcs1Response(payload []byte) (Response, error) {
 	}, nil
 }
 
+func parseHMACDataResponse(payload []byte) (Response, error) {
+	if len(payload) < 1 {
+		return nil, errors.New("invalid response payload length")
+	}
+
+	return &HMACDataResponse{
+		Data: payload,
+	}, nil
+}
+
 func parseSignDataEcdsaResponse(payload []byte) (Response, error) {
 	return &SignDataEcdsaResponse{
 		Signature: payload,