kotlin中图像的AES加密

Question

中加密AES并解密AES的图像

我正在尝试在Kotlin密钥生成

 override suspend fun key_genration(callback: Enc) {
    val keygenerator = KeyGenerator.getInstance("AES")
    keygenerator.init(128)
    val secretKey: Key = keygenerator.generateKey()
    val secretKey1 = secretKey.encoded
    val result = Firebase.firestore.collection("profiles").document("YHMauLouORRtrYBV2h4dHJ5A0s72").update("key","$secretKey1")

}

功能 - 解密

   override suspend fun encryption(imageView: ImageView, Key: ByteArray, name: String, uid: String) {

    val bitmap = (imageView.drawable as BitmapDrawable).bitmap
    val baos = ByteArrayOutputStream()
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos) // bm is the bitmap object
    val ba: ByteArray = baos.toByteArray()

    val cipher = Cipher.getInstance("AES")

    val keySpec = SecretKeySpec(Key, "AES")
   Log.d("key11119","$keySpec")

    cipher.init(Cipher.ENCRYPT_MODE, keySpec)
    val txt = cipher.doFinal(ba)
    Log.d("poott0","$txt")
    val p =  txt.toString(Charsets.ISO_8859_1)

    Log.d("poott","$p")


  //  val encryptText = String(txt, Charset.defaultCharset())
    val file = File.createTempFile("$name", ".txt")
    file.writeText(p)
    //val storageReference = FirebaseStorage.getInstance().getReference("image/$uid/$name")
    val storageReference = FirebaseStorage.getInstance()
        .getReference("/image/0XhL4jD4XCemk38rcRkIEjJMgjh2/Aadhar/")

    storageReference.putFile(Uri.fromFile(file))
}

功能

 val img = view.findViewById<ImageView>(R.id.imageView2)
    Firebase.firestore.collection("profiles").whereEqualTo("UID", "YHMauLouORRtrYBV2h4dHJ5A0s72").get()
            .addOnSuccessListener {
                val key = it.first().toObject(docretreving::class.java).key
                Log.d("key111","$key")
                Log.d("pooptt","Success")
                val storageRef =
                    FirebaseStorage.getInstance().reference?.child("/image/0XhL4jD4XCemk38rcRkIEjJMgjh2/Aadhar/")
                val localfile = File.createTempFile("temp",".txt")
                storageRef.getFile(localfile)
                    .addOnSuccessListener {
                        Log.d("pooptt","Success")
                        val inputStream: InputStream = localfile.inputStream()
                        val inputString = inputStream.bufferedReader().use { it.readText() }
                        println(inputString)
                        Log.d("pooptt", inputString)
                        val key1 = "mxkLZmSFE1aKWzr6JyybjQ==".toByteArray()
                        Log.d("key111","$key1")
                        val keySpec = SecretKeySpec(key1, "AES")
                        val isro= inputString.toByteArray(Charsets.ISO_8859_1)
                        val cipher = Cipher.getInstance("AES")
                        cipher.init(Cipher.DECRYPT_MODE,keySpec)
                        var decryptedText : ByteArray = cipher.doFinal(isro)
                        Log.d("key110","$decryptedText")
                        val baos = ObjectInputStream(ByteArrayInputStream(decryptedText))
                        val bitmap = baos.readObject() as Bitmap
                        img.setImageBitmap(bitmap)

                    }



            }

-它在解密函数中表示无效的块大小，我不确定是否正确执行此操作。密钥生成函数键并赋予加密功能[现在我只是用1个键转换为base64进行测试] 提前致谢

Answer 1

您不应将密码放在缓冲的读取器中，该读取器处理文本并可能更改二进制数据。文件和密文都由字节组成，您应该将其视为这样，而不是将其转换为文本。如果需要文本，请使用基本64。