AB#1902 Ping Coordinator from initramfs for key (#53)

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

state/mapper/mapper.go

@@ -36,6 +36,16 @@ func (m *Mapper) Close() error {
 	return errors.New("unable to close crypt device")
 }
 
+// IsLUKSDevice returns true if the device is formatted as a LUKS device.
+func (m *Mapper) IsLUKSDevice() bool {
+	return m.device.Load(cryptsetup.LUKS2{}) == nil
+}
+
+// GetUUID gets the device's UUID.
+func (m *Mapper) DiskUUID() string {
+	return m.device.GetUUID()
+}
+
 // FormatDisk formats the disk and adds passphrase in keyslot 0.
 func (m *Mapper) FormatDisk(passphrase string) error {
 	luksParams := cryptsetup.LUKS2{