Master key with advanced specification in Jetpack Security

AdvMasterKey.kt

fun generateAdvMasterKey(context: Context): MasterKey {
    val advSpec = KeyGenParameterSpec.Builder(
        "key_name", // define your master key name
        KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT
    ).apply {
          setBlockModes(KeyProperties.BLOCK_MODE_GCM)
          setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
          setKeySize(256)
          setUserAuthenticationRequired(true)
          setUserAuthenticationValidityDurationSeconds(120)
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
              setUnlockDeviceRequired(true)
              setIsStrongBoxBacked(true)
          }
    }.build()
    
    val master = MasterKey.Builder(context).setKeyGenParameterSpec(advSpec)
          
    return master.build()
}