Encrypt a file

Utils.kt

@Throws(Exception::class)
fun encrypt(yourKey: SecretKey, fileData: ByteArray): ByteArray {
     val data = yourKey.getEncoded()
     val skeySpec = SecretKeySpec(data, 0, data.size, "AES")
     val cipher = Cipher.getInstance("AES", "BC")
     cipher.init(Cipher.ENCRYPT_MODE, skeySpec, IvParameterSpec(ByteArray(cipher.getBlockSize())))
     return cipher.doFinal(fileData)
}