How to process encrypted pictures

[lbj1203]

When I use glide, I process the request in the inherited DataFetcher class and don’t decrypt the data, but I don’t know how to do it in the coil. For example, the url of the image I loaded is downloaded with the suffix of .bnc. I need to put the specific letters of the data in it according to The password book has been replaced, but now I don't know how to do it, can you call me.
Below is my decryption code in glide,the rules are simple
val keyMap = hashMapOf( "0" to "!", "1" to ")", "9" to "&", "a" to "*", "c" to "%", "3" to ":", "2" to "+", "d" to "-", "6" to "<" )
`@Override
public void loadData(@nonnull Priority priority, @nonnull DataCallback<? super ByteBuffer> callback) {
try {
Request request = new Request.Builder().url(model)
.addHeader("referer", ImageLoader.INSTANCE.getReferer())
.build();
call = new OkHttpClient.Builder().build().newCall(request);
Response response = call.execute();
if (response.code() == 200) {
if (model.contains(".enc")) {
String responseBody = response.body().string().replace(" ", "");
HashMap<String, String> keymap = ImageLoader.INSTANCE.getKeyMap();
for (String key : keymap.keySet()) {
responseBody = responseBody.replace(keymap.get(key), key);
}
callback.onDataReady(ByteBuffer.wrap(Hex.decode(responseBody)));
} else if (model.contains(".bnc")) {
byte[] result = ImageLoader.INSTANCE.decryptOrigin(response.body().bytes(), ImageLoader.INSTANCE.getAES_KEY());
callback.onDataReady(ByteBuffer.wrap(result));
} else {
callback.onDataReady(ByteBuffer.wrap(response.body().bytes()));
}

        }
    } catch (Exception e) {
        e.printStackTrace();
        callback.onLoadFailed(e);
        Log.e("TAG", "loadData: " + model + "---" + e.toString());
    }
}`