DeviceID

DeviceID.kt

import android.media.MediaDrm
import android.media.UnsupportedSchemeException
import android.os.Build
import java.security.MessageDigest
import java.security.NoSuchAlgorithmException
import java.util.UUID

object DeviceUtils {

  fun getUniqueDeviceId(): String? {
    val uuid = UUID(-0x121074568629b532L, -0x5c37d8232ae2de13L)
    var mediaDrm: MediaDrm? = null
    try {
      mediaDrm = MediaDrm(uuid)
      val widevineId: ByteArray =
        mediaDrm.getPropertyByteArray(MediaDrm.PROPERTY_DEVICE_UNIQUE_ID)
      val md: MessageDigest = MessageDigest.getInstance("SHA-256")
      md.update(widevineId)
      return bytesToHex(md.digest())
    } catch (e: UnsupportedSchemeException) {
      e.printStackTrace()
    } catch (e: NoSuchAlgorithmException) {
      e.printStackTrace()
    } finally {
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
        mediaDrm?.close()
      } else {
        mediaDrm?.release()
      }
    }
    return null
  }

  private const val digits = "0123456789ABCDEF"

  private fun bytesToHex(byteArray: ByteArray): String {
    val hexChars = CharArray(byteArray.size * 2)
    for (i in byteArray.indices) {
      val v = byteArray[i].toInt() and 0xff
      hexChars[i * 2] = digits[v shr 4]
      hexChars[i * 2 + 1] = digits[v and 0xf]
    }
    return String(hexChars)
  }
}