Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions an |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.usb; |
| 18 | |
| 19 | import android.content.ActivityNotFoundException; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.net.LocalSocket; |
| 23 | import android.net.LocalSocketAddress; |
| 24 | import android.os.Handler; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 25 | import android.os.Environment; |
| 26 | import android.os.FileUtils; |
| 27 | import android.os.Looper; |
| 28 | import android.os.Message; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 29 | import android.os.SystemClock; |
| 30 | import android.util.Slog; |
| 31 | import android.util.Base64; |
Dianne Hackborn | 8d044e8 | 2013-04-30 17:24:15 -0700 | [diff] [blame] | 32 | import com.android.server.FgThread; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 33 | |
| 34 | import java.lang.Thread; |
| 35 | import java.io.File; |
| 36 | import java.io.FileDescriptor; |
| 37 | import java.io.FileOutputStream; |
| 38 | import java.io.IOException; |
| 39 | import java.io.InputStream; |
| 40 | import java.io.OutputStream; |
| 41 | import java.io.PrintWriter; |
| 42 | import java.security.MessageDigest; |
| 43 | import java.util.Arrays; |
| 44 | |
| 45 | public class UsbDebuggingManager implements Runnable { |
| 46 | private static final String TAG = "UsbDebuggingManager"; |
| 47 | private static final boolean DEBUG = false; |
| 48 | |
| 49 | private final String ADBD_SOCKET = "adbd"; |
| 50 | private final String ADB_DIRECTORY = "misc/adb"; |
| 51 | private final String ADB_KEYS_FILE = "adb_keys"; |
| 52 | private final int BUFFER_SIZE = 4096; |
| 53 | |
| 54 | private final Context mContext; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 55 | private final Handler mHandler; |
Benoit Goby | 509bf2d | 2012-08-29 15:23:30 -0700 | [diff] [blame] | 56 | private Thread mThread; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 57 | private boolean mAdbEnabled = false; |
| 58 | private String mFingerprints; |
| 59 | private LocalSocket mSocket = null; |
| 60 | private OutputStream mOutputStream = null; |
| 61 | |
| 62 | public UsbDebuggingManager(Context context) { |
Dianne Hackborn | 8d044e8 | 2013-04-30 17:24:15 -0700 | [diff] [blame] | 63 | mHandler = new UsbDebuggingHandler(FgThread.get().getLooper()); |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 64 | mContext = context; |
| 65 | } |
| 66 | |
| 67 | private void listenToSocket() throws IOException { |
| 68 | try { |
| 69 | byte[] buffer = new byte[BUFFER_SIZE]; |
| 70 | LocalSocketAddress address = new LocalSocketAddress(ADBD_SOCKET, |
| 71 | LocalSocketAddress.Namespace.RESERVED); |
| 72 | InputStream inputStream = null; |
| 73 | |
| 74 | mSocket = new LocalSocket(); |
| 75 | mSocket.connect(address); |
| 76 | |
| 77 | mOutputStream = mSocket.getOutputStream(); |
| 78 | inputStream = mSocket.getInputStream(); |
| 79 | |
| 80 | while (true) { |
| 81 | int count = inputStream.read(buffer); |
| 82 | if (count < 0) { |
| 83 | Slog.e(TAG, "got " + count + " reading"); |
| 84 | break; |
| 85 | } |
| 86 | |
| 87 | if (buffer[0] == 'P' && buffer[1] == 'K') { |
| 88 | String key = new String(Arrays.copyOfRange(buffer, 2, count)); |
| 89 | Slog.d(TAG, "Received public key: " + key); |
| 90 | Message msg = mHandler.obtainMessage(UsbDebuggingHandler.MESSAGE_ADB_CONFIRM); |
| 91 | msg.obj = key; |
| 92 | mHandler.sendMessage(msg); |
| 93 | } |
| 94 | else { |
| 95 | Slog.e(TAG, "Wrong message: " + (new String(Arrays.copyOfRange(buffer, 0, 2)))); |
| 96 | break; |
| 97 | } |
| 98 | } |
| 99 | } catch (IOException ex) { |
| 100 | Slog.e(TAG, "Communication error: ", ex); |
| 101 | throw ex; |
| 102 | } finally { |
| 103 | closeSocket(); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | @Override |
| 108 | public void run() { |
| 109 | while (mAdbEnabled) { |
| 110 | try { |
| 111 | listenToSocket(); |
| 112 | } catch (Exception e) { |
| 113 | /* Don't loop too fast if adbd dies, before init restarts it */ |
| 114 | SystemClock.sleep(1000); |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | private void closeSocket() { |
| 120 | try { |
| 121 | mOutputStream.close(); |
| 122 | } catch (IOException e) { |
| 123 | Slog.e(TAG, "Failed closing output stream: " + e); |
| 124 | } |
| 125 | |
| 126 | try { |
| 127 | mSocket.close(); |
| 128 | } catch (IOException ex) { |
| 129 | Slog.e(TAG, "Failed closing socket: " + ex); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | private void sendResponse(String msg) { |
| 134 | if (mOutputStream != null) { |
| 135 | try { |
| 136 | mOutputStream.write(msg.getBytes()); |
| 137 | } |
| 138 | catch (IOException ex) { |
| 139 | Slog.e(TAG, "Failed to write response:", ex); |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | class UsbDebuggingHandler extends Handler { |
| 145 | private static final int MESSAGE_ADB_ENABLED = 1; |
| 146 | private static final int MESSAGE_ADB_DISABLED = 2; |
| 147 | private static final int MESSAGE_ADB_ALLOW = 3; |
| 148 | private static final int MESSAGE_ADB_DENY = 4; |
| 149 | private static final int MESSAGE_ADB_CONFIRM = 5; |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 150 | private static final int MESSAGE_ADB_CLEAR = 6; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 151 | |
| 152 | public UsbDebuggingHandler(Looper looper) { |
| 153 | super(looper); |
| 154 | } |
| 155 | |
| 156 | public void handleMessage(Message msg) { |
| 157 | switch (msg.what) { |
| 158 | case MESSAGE_ADB_ENABLED: |
| 159 | if (mAdbEnabled) |
| 160 | break; |
| 161 | |
| 162 | mAdbEnabled = true; |
| 163 | |
Dianne Hackborn | efa92b2 | 2013-05-03 14:11:43 -0700 | [diff] [blame] | 164 | mThread = new Thread(UsbDebuggingManager.this, TAG); |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 165 | mThread.start(); |
| 166 | |
| 167 | break; |
| 168 | |
| 169 | case MESSAGE_ADB_DISABLED: |
| 170 | if (!mAdbEnabled) |
| 171 | break; |
| 172 | |
| 173 | mAdbEnabled = false; |
| 174 | closeSocket(); |
| 175 | |
| 176 | try { |
| 177 | mThread.join(); |
| 178 | } catch (Exception ex) { |
| 179 | } |
| 180 | |
Benoit Goby | 509bf2d | 2012-08-29 15:23:30 -0700 | [diff] [blame] | 181 | mThread = null; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 182 | mOutputStream = null; |
| 183 | mSocket = null; |
Benoit Goby | 37ce5c5 | 2012-08-29 13:49:07 -0700 | [diff] [blame] | 184 | break; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 185 | |
| 186 | case MESSAGE_ADB_ALLOW: { |
| 187 | String key = (String)msg.obj; |
| 188 | String fingerprints = getFingerprints(key); |
| 189 | |
| 190 | if (!fingerprints.equals(mFingerprints)) { |
| 191 | Slog.e(TAG, "Fingerprints do not match. Got " |
| 192 | + fingerprints + ", expected " + mFingerprints); |
| 193 | break; |
| 194 | } |
| 195 | |
| 196 | if (msg.arg1 == 1) { |
| 197 | writeKey(key); |
| 198 | } |
| 199 | |
| 200 | sendResponse("OK"); |
| 201 | break; |
| 202 | } |
| 203 | |
| 204 | case MESSAGE_ADB_DENY: |
| 205 | sendResponse("NO"); |
| 206 | break; |
| 207 | |
| 208 | case MESSAGE_ADB_CONFIRM: { |
| 209 | String key = (String)msg.obj; |
| 210 | mFingerprints = getFingerprints(key); |
| 211 | showConfirmationDialog(key, mFingerprints); |
| 212 | break; |
| 213 | } |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 214 | |
| 215 | case MESSAGE_ADB_CLEAR: |
| 216 | deleteKeyFile(); |
| 217 | break; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | private String getFingerprints(String key) { |
| 223 | String hex = "0123456789ABCDEF"; |
| 224 | StringBuilder sb = new StringBuilder(); |
| 225 | MessageDigest digester; |
| 226 | |
| 227 | try { |
| 228 | digester = MessageDigest.getInstance("MD5"); |
| 229 | } catch (Exception ex) { |
| 230 | Slog.e(TAG, "Error getting digester: " + ex); |
| 231 | return ""; |
| 232 | } |
| 233 | |
| 234 | byte[] base64_data = key.split("\\s+")[0].getBytes(); |
| 235 | byte[] digest = digester.digest(Base64.decode(base64_data, Base64.DEFAULT)); |
| 236 | |
| 237 | for (int i = 0; i < digest.length; i++) { |
| 238 | sb.append(hex.charAt((digest[i] >> 4) & 0xf)); |
| 239 | sb.append(hex.charAt(digest[i] & 0xf)); |
| 240 | if (i < digest.length - 1) |
| 241 | sb.append(":"); |
| 242 | } |
| 243 | return sb.toString(); |
| 244 | } |
| 245 | |
| 246 | private void showConfirmationDialog(String key, String fingerprints) { |
| 247 | Intent dialogIntent = new Intent(); |
| 248 | |
| 249 | dialogIntent.setClassName("com.android.systemui", |
| 250 | "com.android.systemui.usb.UsbDebuggingActivity"); |
| 251 | dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| 252 | dialogIntent.putExtra("key", key); |
| 253 | dialogIntent.putExtra("fingerprints", fingerprints); |
| 254 | try { |
| 255 | mContext.startActivity(dialogIntent); |
| 256 | } catch (ActivityNotFoundException e) { |
| 257 | Slog.e(TAG, "unable to start UsbDebuggingActivity"); |
| 258 | } |
| 259 | } |
| 260 | |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 261 | private File getUserKeyFile() { |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 262 | File dataDir = Environment.getDataDirectory(); |
| 263 | File adbDir = new File(dataDir, ADB_DIRECTORY); |
| 264 | |
| 265 | if (!adbDir.exists()) { |
| 266 | Slog.e(TAG, "ADB data directory does not exist"); |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 267 | return null; |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 270 | return new File(adbDir, ADB_KEYS_FILE); |
| 271 | } |
| 272 | |
| 273 | private void writeKey(String key) { |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 274 | try { |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 275 | File keyFile = getUserKeyFile(); |
| 276 | |
| 277 | if (keyFile == null) { |
| 278 | return; |
| 279 | } |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 280 | |
| 281 | if (!keyFile.exists()) { |
| 282 | keyFile.createNewFile(); |
| 283 | FileUtils.setPermissions(keyFile.toString(), |
| 284 | FileUtils.S_IRUSR | FileUtils.S_IWUSR | |
| 285 | FileUtils.S_IRGRP, -1, -1); |
| 286 | } |
| 287 | |
| 288 | FileOutputStream fo = new FileOutputStream(keyFile, true); |
| 289 | fo.write(key.getBytes()); |
| 290 | fo.write('\n'); |
| 291 | fo.close(); |
| 292 | } |
| 293 | catch (IOException ex) { |
| 294 | Slog.e(TAG, "Error writing key:" + ex); |
| 295 | } |
| 296 | } |
| 297 | |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 298 | private void deleteKeyFile() { |
| 299 | File keyFile = getUserKeyFile(); |
| 300 | if (keyFile != null) { |
| 301 | keyFile.delete(); |
| 302 | } |
| 303 | } |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 304 | |
| 305 | public void setAdbEnabled(boolean enabled) { |
| 306 | mHandler.sendEmptyMessage(enabled ? UsbDebuggingHandler.MESSAGE_ADB_ENABLED |
| 307 | : UsbDebuggingHandler.MESSAGE_ADB_DISABLED); |
| 308 | } |
| 309 | |
| 310 | public void allowUsbDebugging(boolean alwaysAllow, String publicKey) { |
| 311 | Message msg = mHandler.obtainMessage(UsbDebuggingHandler.MESSAGE_ADB_ALLOW); |
| 312 | msg.arg1 = alwaysAllow ? 1 : 0; |
| 313 | msg.obj = publicKey; |
| 314 | mHandler.sendMessage(msg); |
| 315 | } |
| 316 | |
| 317 | public void denyUsbDebugging() { |
| 318 | mHandler.sendEmptyMessage(UsbDebuggingHandler.MESSAGE_ADB_DENY); |
| 319 | } |
| 320 | |
Benoit Goby | cd7a17c | 2012-12-21 16:44:50 -0800 | [diff] [blame] | 321 | public void clearUsbDebuggingKeys() { |
| 322 | mHandler.sendEmptyMessage(UsbDebuggingHandler.MESSAGE_ADB_CLEAR); |
| 323 | } |
Benoit Goby | 4e68bd4 | 2012-04-25 18:06:00 -0700 | [diff] [blame] | 324 | |
| 325 | public void dump(FileDescriptor fd, PrintWriter pw) { |
| 326 | pw.println(" USB Debugging State:"); |
| 327 | pw.println(" Connected to adbd: " + (mOutputStream != null)); |
| 328 | pw.println(" Last key received: " + mFingerprints); |
| 329 | pw.println(" User keys:"); |
| 330 | try { |
| 331 | pw.println(FileUtils.readTextFile(new File("/data/misc/adb/adb_keys"), 0, null)); |
| 332 | } catch (IOException e) { |
| 333 | pw.println("IOException: " + e); |
| 334 | } |
| 335 | pw.println(" System keys:"); |
| 336 | try { |
| 337 | pw.println(FileUtils.readTextFile(new File("/adb_keys"), 0, null)); |
| 338 | } catch (IOException e) { |
| 339 | pw.println("IOException: " + e); |
| 340 | } |
| 341 | } |
| 342 | } |