diff --git a/tea.go b/tea.go
index 2754482..52bbcce 100644
--- a/tea.go
+++ b/tea.go
@@ -11,10 +11,10 @@ type TEA [4]uint32
 //go:nosplit
 func NewTeaCipher(key []byte) (t TEA) {
 	if len(key) == 16 {
-		t[3] = binary.BigEndian.Uint32(key[12:])
-		t[2] = binary.BigEndian.Uint32(key[8:])
-		t[1] = binary.BigEndian.Uint32(key[4:])
-		t[0] = binary.BigEndian.Uint32(key[0:])
+		t[3] = binary.BigEndian.Uint32(key[12:16])
+		t[2] = binary.BigEndian.Uint32(key[8:12])
+		t[1] = binary.BigEndian.Uint32(key[4:8])
+		t[0] = binary.BigEndian.Uint32(key[0:4])
 	}
 	return
 }
@@ -22,10 +22,28 @@ func NewTeaCipher(key []byte) (t TEA) {
 //go:nosplit
 func NewTeaCipherLittleEndian(key []byte) (t TEA) {
 	if len(key) == 16 {
-		t[3] = binary.LittleEndian.Uint32(key[12:])
-		t[2] = binary.LittleEndian.Uint32(key[8:])
-		t[1] = binary.LittleEndian.Uint32(key[4:])
-		t[0] = binary.LittleEndian.Uint32(key[0:])
+		t[3] = binary.LittleEndian.Uint32(key[12:16])
+		t[2] = binary.LittleEndian.Uint32(key[8:12])
+		t[1] = binary.LittleEndian.Uint32(key[4:8])
+		t[0] = binary.LittleEndian.Uint32(key[0:4])
 	}
 	return
 }
+
+func (t TEA) ToBytes() []byte {
+	var buf [16]byte
+	binary.BigEndian.PutUint32(buf[0:4], t[0])
+	binary.BigEndian.PutUint32(buf[4:8], t[1])
+	binary.BigEndian.PutUint32(buf[8:12], t[2])
+	binary.BigEndian.PutUint32(buf[12:16], t[3])
+	return buf[:]
+}
+
+func (t TEA) ToBytesLittleEndian() []byte {
+	var buf [16]byte
+	binary.LittleEndian.PutUint32(buf[0:4], t[0])
+	binary.LittleEndian.PutUint32(buf[4:8], t[1])
+	binary.LittleEndian.PutUint32(buf[8:12], t[2])
+	binary.LittleEndian.PutUint32(buf[12:16], t[3])
+	return buf[:]
+}