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103 changes: 103 additions & 0 deletions
103
app/src/main/java/com/eveningoutpost/dexdrip/cloud/jamcm/JamCm.java
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| @@ -0,0 +1,103 @@ | ||
| package com.eveningoutpost.dexdrip.cloud.jamcm; | ||
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| import static com.eveningoutpost.dexdrip.utils.CipherUtils.hexToBytes; | ||
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| import android.os.Bundle; | ||
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| import com.eveningoutpost.dexdrip.GcmActivity; | ||
| import com.eveningoutpost.dexdrip.models.JoH; | ||
| import com.eveningoutpost.dexdrip.models.UserError; | ||
| import com.eveningoutpost.dexdrip.utils.CipherUtils; | ||
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| import java.net.DatagramPacket; | ||
| import java.net.DatagramSocket; | ||
| import java.net.InetAddress; | ||
| import java.nio.ByteBuffer; | ||
| import java.nio.ByteOrder; | ||
| import java.nio.charset.StandardCharsets; | ||
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| import lombok.val; | ||
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| /** | ||
| * JamOrHam | ||
| * <p> | ||
| * Replacement for GCM | ||
| */ | ||
| public class JamCm { | ||
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| private static final String TAG = "JamCm"; | ||
| private static final String serverInstance = "jamcm3749021"; | ||
| private static final String serverDomain = "bluejay.website"; | ||
| private static final String serverAddress = serverInstance + "." + serverDomain; | ||
| private static final int serverPort = 5228; | ||
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| private static final byte PROTOCOL_VERSION = 1; | ||
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| /** | ||
| * @noinspection DataFlowIssue | ||
| */ | ||
| public static String getId() { | ||
| if (GcmActivity.token == null) { | ||
| return null; | ||
| } | ||
| try { | ||
| return CipherUtils.getSHA256(GcmActivity.token).substring(0, 32); | ||
| } catch (Exception e) { | ||
| UserError.Log.wtf(TAG, "Got exception in getId: " + e); | ||
| return null; | ||
| } | ||
| } | ||
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| /** | ||
| * @noinspection DataFlowIssue | ||
| */ | ||
| public static void sendMessage(Bundle input) { | ||
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| val ids = getId(); | ||
| if (ids == null) { | ||
| if (JoH.ratelimit("sendMessage error", 1200)) { | ||
| UserError.Log.wtf(TAG, "Cannot send message due to missing id"); | ||
| } | ||
| return; | ||
| } | ||
| try { | ||
| UserError.Log.d(TAG, "sendMessage called"); | ||
| InetAddress address = InetAddress.getByName(serverAddress); | ||
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| byte[] id = hexToBytes(ids); | ||
| if (id.length != 16) { | ||
| throw new RuntimeException("Invalid id length: " + id.length); | ||
| } | ||
| byte[] channel = GcmActivity.myIdentity().getBytes(StandardCharsets.UTF_8); | ||
| if (channel.length != 32) { | ||
| throw new RuntimeException("Invalid channel length: " + channel.length); | ||
| } | ||
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| byte[] type = new byte[16]; | ||
| byte[] actionb = input.getString("action").getBytes(StandardCharsets.UTF_8); | ||
| System.arraycopy(actionb, 0, type, 0, Math.min(type.length, actionb.length)); | ||
| byte[] payload = input.getString("payload").getBytes(StandardCharsets.UTF_8); | ||
| short messageSize = (short) payload.length; | ||
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| val buffer = ByteBuffer.allocate(1 + 16 + 32 + 16 + 2 + payload.length); | ||
| buffer.order(ByteOrder.LITTLE_ENDIAN); | ||
| buffer.put(PROTOCOL_VERSION); | ||
| buffer.put(id); | ||
| buffer.put(channel); | ||
| buffer.put(type); | ||
| buffer.putShort(messageSize); | ||
| buffer.put(payload); | ||
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| val data = buffer.array(); | ||
| val packet = new DatagramPacket(data, data.length, address, serverPort); | ||
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| try (DatagramSocket socket = new DatagramSocket()) { | ||
| socket.send(packet); | ||
| UserError.Log.d(TAG, "Message sent to server"); | ||
| } | ||
| } catch (Exception e) { | ||
| UserError.Log.e(TAG, "Error: " + e); | ||
| } | ||
| } | ||
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| } |