├── .gitignore ├── LICENSE ├── README.md ├── app ├── build.gradle ├── proguard-rules.pro └── src │ └── main │ ├── AndroidManifest.xml │ ├── assets │ └── fonts │ │ ├── opensans-bold.ttf │ │ ├── opensans-extrabold.ttf │ │ ├── opensans-light.ttf │ │ ├── opensans-regular.ttf │ │ └── opensans-semibold.ttf │ ├── java │ └── com │ │ └── ledger │ │ └── android │ │ └── u2f │ │ └── bridge │ │ ├── MainActivity.java │ │ ├── TypefaceHelper.java │ │ ├── U2FHelper.java │ │ ├── U2FTransportAndroid.java │ │ ├── U2FTransportAndroidHID.java │ │ ├── U2FTransportFactoryCallback.java │ │ └── utils │ │ └── Dump.java │ └── res │ ├── drawable-hdpi │ └── ic_launcher.png │ ├── drawable-mdpi │ └── ic_launcher.png │ ├── drawable-v21 │ ├── bg_green_button.xml │ └── bg_grey_button.xml │ ├── drawable-xhdpi │ └── ic_launcher.png │ ├── drawable-xxhdpi │ └── ic_launcher.png │ ├── drawable-xxxhdpi │ └── ic_launcher.png │ ├── drawable │ ├── bg_edittext.xml │ ├── bg_green_button.xml │ ├── bg_grey_button.xml │ └── bg_window.xml │ ├── layout │ ├── activity_main.xml │ └── content_main.xml │ ├── menu │ └── menu_main.xml │ ├── values-v11 │ └── styles.xml │ ├── values-v14 │ └── styles.xml │ ├── values-v21 │ └── styles.xml │ ├── values-w820dp │ └── dimens.xml │ └── values │ ├── colors.xml │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml ├── build.gradle ├── circle.yml ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | .gradle 2 | app/build 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Android U2F Bridge 2 | 3 | This application is an early implementation of an U2F implementation for USB devices on Android. Expect alpha quality software : the UI is buggy, the U2F implementation has been thoroughly simplified, and it works sometimes, for many devices, and sometimes not (typically on a Yubikey v4, for unknown reasons). It is mostly intended for developers, U2F fans or Ethereum enthusiasts who want to join the latest popular ICO with MyEtherWallet on Android. 4 | 5 | The bridge aggressively catches events sent to Google Authenticator - if you wish to test it with a different event source, comment it out in the manifest. 6 | 7 | Building 8 | ======== 9 | 10 | Use gradlew assembleDebug 11 | 12 | Contact 13 | ======= 14 | 15 | Please report bugs and features to hello@ledger.fr 16 | 17 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | android { 3 | packagingOptions { 4 | } 5 | compileSdkVersion 23 6 | buildToolsVersion '23.0.2' 7 | 8 | defaultConfig { 9 | applicationId 'com.ledger.android.u2f.bridge' 10 | minSdkVersion 14 11 | targetSdkVersion 23 12 | versionCode 1 13 | // Don't use defaultConfig.getProperty("versionCode") in versionName 14 | // because it breaks F-Droid! 15 | versionName "1.0" 16 | } 17 | buildTypes { 18 | release { 19 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 20 | multiDexEnabled true 21 | minifyEnabled true 22 | shrinkResources true 23 | } 24 | debug { 25 | multiDexEnabled true 26 | } 27 | } 28 | productFlavors { 29 | production { 30 | } 31 | } 32 | dexOptions { 33 | javaMaxHeapSize "2g" 34 | } 35 | } 36 | 37 | configurations { 38 | } 39 | 40 | dependencies { 41 | compile 'com.android.support:support-v4:23.1.1' 42 | compile 'com.android.support:appcompat-v7:23.1.1' 43 | compile 'com.google.protobuf:protobuf-java:2.6.1' 44 | compile 'com.android.support:design:22.2.0' 45 | } 46 | 47 | repositories { 48 | jcenter() 49 | } 50 | 51 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in ANDROID_HOME/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | 19 | -keep class org.codehaus.jackson.** { *; } 20 | -keep class android.support.v7.** { *; } 21 | 22 | # BEGIN for protobuf in trezor: 23 | -keep class com.satoshilabs.trezor.** { *; } 24 | -keepattributes InnerClasses,EnclosingMethod 25 | # END for protobuf in trezor 26 | 27 | -dontwarn org.codehaus.jackson.** 28 | -dontwarn com.google.common.** 29 | -dontwarn org.slf4j.** 30 | -dontwarn sun.nio.** 31 | -dontwarn sun.misc.** 32 | -dontwarn okio.** 33 | -dontwarn org.bitcoinj.store.** 34 | -dontwarn com.mysql.** 35 | -dontwarn org.h2.** 36 | -dontwarn org.postgresql.** 37 | 38 | 39 | -keepnames class ** { *; } 40 | -keepattributes SourceFile,LineNumberTable 41 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 10 | 11 | 16 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | -------------------------------------------------------------------------------- /app/src/main/assets/fonts/opensans-bold.ttf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/assets/fonts/opensans-bold.ttf -------------------------------------------------------------------------------- /app/src/main/assets/fonts/opensans-extrabold.ttf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/assets/fonts/opensans-extrabold.ttf -------------------------------------------------------------------------------- /app/src/main/assets/fonts/opensans-light.ttf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/assets/fonts/opensans-light.ttf -------------------------------------------------------------------------------- /app/src/main/assets/fonts/opensans-regular.ttf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/assets/fonts/opensans-regular.ttf -------------------------------------------------------------------------------- /app/src/main/assets/fonts/opensans-semibold.ttf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/assets/fonts/opensans-semibold.ttf -------------------------------------------------------------------------------- /app/src/main/java/com/ledger/android/u2f/bridge/MainActivity.java: -------------------------------------------------------------------------------- 1 | /* 2 | ******************************************************************************* 3 | * Android U2F USB BridgE 4 | * (c) 2016 Ledger 5 | * 6 | * Licensed under the Apache License, Version 2.0 (the "License"); 7 | * you may not use this file except in compliance with the License. 8 | * You may obtain a copy of the License at 9 | * 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * 12 | * Unless required by applicable law or agreed to in writing, software 13 | * distributed under the License is distributed on an "AS IS" BASIS, 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | * See the License for the specific language governing permissions and 16 | * limitations under the License. 17 | ********************************************************************************/ 18 | 19 | 20 | package com.ledger.android.u2f.bridge; 21 | 22 | import java.util.Iterator; 23 | import java.util.Set; 24 | import java.util.Vector; 25 | import java.io.IOException; 26 | import java.io.ByteArrayOutputStream; 27 | import java.security.MessageDigest; 28 | 29 | import org.json.JSONObject; 30 | import org.json.JSONArray; 31 | import org.json.JSONException; 32 | 33 | import android.annotation.SuppressLint; 34 | import android.content.ComponentName; 35 | import android.content.Context; 36 | import android.content.Intent; 37 | import android.content.ServiceConnection; 38 | import android.content.SharedPreferences; 39 | import android.content.pm.PackageInfo; 40 | import android.content.pm.PackageManager; 41 | import android.os.Bundle; 42 | import android.os.IBinder; 43 | import android.support.v7.app.AppCompatActivity; 44 | import android.support.v7.widget.Toolbar; 45 | import android.view.View; 46 | import android.view.ViewGroup; 47 | import android.app.Activity; 48 | import android.widget.Button; 49 | import android.widget.TextView; 50 | import android.widget.Toast; 51 | import android.util.Log; 52 | import android.util.Base64; 53 | 54 | @SuppressLint("NewApi") 55 | public class MainActivity extends AppCompatActivity { 56 | 57 | private static final String TAG = "LedgerU2FBridge"; 58 | 59 | private static final String ACTION_GOOGLE = "com.google.android.apps.authenticator.AUTHENTICATE"; 60 | private static final String ACTION_LEDGER = "com.ledger.android.u2f.bridge.AUTHENTICATE"; 61 | private static final String TAG_REQUEST = "request"; 62 | private static final String TAG_RESULT_DATA = "resultData"; 63 | private static final String TAG_JSON_TYPE = "type"; 64 | private static final String TAG_JSON_APPID = "appId"; 65 | private static final String TAG_JSON_CHALLENGE = "challenge"; 66 | private static final String TAG_JSON_REGISTERED_KEYS = "registeredKeys"; 67 | private static final String TAG_JSON_REGISTER_REQUESTS = "registerRequests"; 68 | private static final String TAG_JSON_KEYHANDLE = "keyHandle"; 69 | private static final String TAG_JSON_VERSION = "version"; 70 | private static final String TAG_JSON_REQUESTID = "requestId"; 71 | private static final String TAG_JSON_RESPONSEDATA = "responseData"; 72 | private static final String TAG_JSON_CLIENTDATA = "clientData"; 73 | private static final String TAG_JSON_SIGNATUREDATA = "signatureData"; 74 | private static final String TAG_JSON_REGISTRATIONDATA = "registrationData"; 75 | private static final String TAG_JSON_TYP = "typ"; 76 | private static final String TAG_JSON_ORIGIN = "origin"; 77 | private static final String TAG_JSON_CID_PUBKEY = "cid_pubkey"; 78 | 79 | private static final String SIGN_REQUEST_TYPE = "u2f_sign_request"; 80 | private static final String SIGN_RESPONSE_TYPE = "u2f_sign_response"; 81 | private static final String SIGN_RESPONSE_TYP = "navigator.id.getAssertion"; 82 | private static final String REGISTER_REQUEST_TYPE = "u2f_register_request"; 83 | private static final String REGISTER_RESPONSE_TYPE = "u2f_register_response"; 84 | private static final String REGISTER_RESPONSE_TYP = "navigator.id.finishEnrollment"; 85 | private static final String CID_UNAVAILABLE = "unavailable"; 86 | 87 | private static final String VERSION_U2F_V2 = "U2F_V2"; 88 | 89 | private static final int SW_OK = 0x9000; 90 | private static final int SW_USER_PRESENCE_REQUIRED = 0x6985; 91 | 92 | private class U2FContext { 93 | 94 | public U2FContext(String appId, byte[] challenge, Vector keyHandles, int requestId, boolean sign) { 95 | this.appId = appId; 96 | this.challenge = challenge; 97 | this.keyHandles = keyHandles; 98 | this.requestId = requestId; 99 | this.sign = sign; 100 | } 101 | 102 | public String getAppId() { 103 | return appId; 104 | } 105 | 106 | public byte[] getChallenge() { 107 | return challenge; 108 | } 109 | 110 | public Vector getKeyHandles() { 111 | return keyHandles; 112 | } 113 | 114 | public void setChosenKeyHandle(byte[] chosenKeyHandle) { 115 | this.chosenKeyHandle = chosenKeyHandle; 116 | } 117 | 118 | public byte[] getChosenKeyHandle() { 119 | return chosenKeyHandle; 120 | } 121 | 122 | public int getRequestId() { 123 | return requestId; 124 | } 125 | 126 | public boolean isSign() { 127 | return sign; 128 | } 129 | 130 | private String appId; 131 | private byte[] challenge; 132 | private Vector keyHandles; 133 | private byte[] chosenKeyHandle; 134 | private int requestId; 135 | private boolean sign; 136 | } 137 | 138 | private class U2FAuthRunner extends Thread implements U2FTransportFactoryCallback { 139 | 140 | //private static final int PAUSE = 50; 141 | private static final int PAUSE = 300; 142 | 143 | private static final int FIDO_CLA = 0x00; 144 | private static final int FIDO_INS_AUTH = 0x02; 145 | private static final int FIDO_INS_REGISTER = 0x01; 146 | private static final int FIDO_P1_SIGN = 0x03; 147 | 148 | 149 | private U2FContext context; 150 | private U2FTransportAndroid transportBuilder; 151 | private boolean stopped; 152 | 153 | public U2FAuthRunner(U2FContext context) { 154 | this.context = context; 155 | transportBuilder = new U2FTransportAndroid(MainActivity.this); 156 | } 157 | 158 | public void markStopped() { 159 | stopped = true; 160 | transportBuilder.markStopped(); 161 | } 162 | 163 | private boolean isResponseOK(byte[] response) { 164 | if ((response == null) || (response.length < 2)) { 165 | return false; 166 | } 167 | int sw = ((response[response.length - 2] & 0xff) << 8) | (response[response.length - 1] & 0xff); 168 | return sw == SW_OK; 169 | } 170 | 171 | private boolean isResponseBusy(byte[] response) { 172 | if ((response == null) || (response.length < 2)) { 173 | return false; 174 | } 175 | int sw = ((response[response.length - 2] & 0xff) << 8) | (response[response.length - 1] & 0xff); 176 | return sw == SW_USER_PRESENCE_REQUIRED; 177 | } 178 | 179 | private byte[] processSign(U2FTransportAndroidHID transport) throws Exception { 180 | byte[] response = null; 181 | choiceLoop: 182 | for (byte[] keyHandle : context.getKeyHandles()) { 183 | if (stopped) { 184 | break; 185 | } 186 | for(;;) { 187 | if (stopped) { 188 | break; 189 | } 190 | ByteArrayOutputStream bos = new ByteArrayOutputStream(); 191 | int msgLength = 32 + 32 + 1 + keyHandle.length; 192 | bos.write(FIDO_CLA); 193 | bos.write(FIDO_INS_AUTH); 194 | bos.write(FIDO_P1_SIGN); 195 | bos.write(0x00); // p2 196 | bos.write(0x00); // extended length 197 | bos.write(msgLength >> 8); 198 | bos.write(msgLength & 0xff); 199 | MessageDigest digest = MessageDigest.getInstance("SHA-256"); 200 | bos.write(digest.digest(MainActivity.this.createClientData(context).getBytes("UTF-8"))); 201 | bos.write(digest.digest(context.getAppId().getBytes("UTF-8"))); 202 | bos.write(keyHandle.length); 203 | bos.write(keyHandle); 204 | bos.write(0x00); 205 | bos.write(0x00); 206 | byte[] authApdu = bos.toByteArray(); 207 | response = transport.exchange(authApdu); 208 | if (isResponseOK(response)) { 209 | context.setChosenKeyHandle(keyHandle); 210 | break choiceLoop; 211 | } 212 | if (!isResponseBusy(response)) { 213 | break; 214 | } 215 | else { 216 | response = null; 217 | Thread.sleep(PAUSE); 218 | } 219 | } 220 | } 221 | return response; 222 | } 223 | 224 | private byte[] processRegister(U2FTransportAndroidHID transport) throws Exception { 225 | byte[] response = null; 226 | for (;;) { 227 | if (stopped) { 228 | break; 229 | } 230 | ByteArrayOutputStream bos = new ByteArrayOutputStream(); 231 | int msgLength = 32 + 32; 232 | bos.write(FIDO_CLA); 233 | bos.write(FIDO_INS_REGISTER); 234 | bos.write(0x00); // p1 235 | bos.write(0x00); // p2 236 | bos.write(0x00); // extended length 237 | bos.write(msgLength >> 8); 238 | bos.write(msgLength & 0xff); 239 | MessageDigest digest = MessageDigest.getInstance("SHA-256"); 240 | bos.write(digest.digest(MainActivity.this.createClientData(context).getBytes("UTF-8"))); 241 | bos.write(digest.digest(context.getAppId().getBytes("UTF-8"))); 242 | bos.write(0x00); 243 | bos.write(0x00); 244 | byte[] authApdu = bos.toByteArray(); 245 | response = transport.exchange(authApdu); 246 | if (isResponseOK(response)) { 247 | break; 248 | } 249 | if (isResponseBusy(response)) { 250 | response = null; 251 | Thread.sleep(200); 252 | } 253 | else { 254 | response = null; 255 | break; 256 | } 257 | } 258 | return response; 259 | } 260 | 261 | 262 | public void onConnected(boolean success) { 263 | byte[] response = null; 264 | if (success) { 265 | U2FTransportAndroidHID transport = transportBuilder.getTransport(); 266 | try { 267 | transport.setDebug(true); 268 | transport.init(); 269 | if (context.isSign()) { 270 | response = processSign(transport); 271 | } 272 | else { 273 | response = processRegister(transport); 274 | } 275 | } 276 | catch(Exception e) { 277 | e.printStackTrace(); 278 | response = null; 279 | } 280 | try { 281 | transport.close(); 282 | } 283 | catch(IOException e) { 284 | } 285 | } 286 | else { 287 | } 288 | final byte[] sentResponse = (isResponseOK(response) ? response : null); 289 | MainActivity.this.runOnUiThread(new Runnable() { 290 | public void run() { 291 | MainActivity.this.postResponse(sentResponse); 292 | } 293 | }); 294 | } 295 | 296 | public void run() { 297 | while (!transportBuilder.isPluggedIn() && !stopped) { 298 | try { 299 | Thread.sleep(PAUSE); 300 | } 301 | catch(InterruptedException e) { 302 | } 303 | } 304 | if (stopped) { 305 | return; 306 | } 307 | transportBuilder.connect(MainActivity.this, this); 308 | } 309 | } 310 | 311 | 312 | private Button mCancelButton; 313 | private U2FContext mU2FContext; 314 | private U2FAuthRunner mAuthThread; 315 | 316 | 317 | private U2FContext parseU2FContext(String data) { 318 | try { 319 | JSONObject json = new JSONObject(data); 320 | String requestType = json.getString(TAG_JSON_TYPE); 321 | if (requestType.equals(SIGN_REQUEST_TYPE)) { 322 | return parseU2FContextSign(json); 323 | } 324 | else 325 | if (requestType.equals(REGISTER_REQUEST_TYPE)) { 326 | return parseU2FContextRegister(json); 327 | } 328 | else { 329 | Log.e(TAG, "Invalid request type"); 330 | return null; 331 | } 332 | } 333 | catch(JSONException e) { 334 | Log.e(TAG, "Error decoding request"); 335 | return null; 336 | } 337 | 338 | } 339 | 340 | private U2FContext parseU2FContextSign(JSONObject json) { 341 | try { 342 | String appId = json.getString(TAG_JSON_APPID); 343 | byte[] challenge = Base64.decode(json.getString(TAG_JSON_CHALLENGE), Base64.URL_SAFE); 344 | int requestId = json.getInt(TAG_JSON_REQUESTID); 345 | JSONArray array = json.getJSONArray(TAG_JSON_REGISTERED_KEYS); 346 | Vector keyHandles = new Vector(); 347 | for (int i=0; i sTypefaceCache = new HashMap<>(); 32 | 33 | public static void applyFonts(ViewGroup parent) { 34 | final int childCount = parent.getChildCount(); 35 | for (int childIndex = 0; childIndex < childCount; childIndex++) { 36 | final View child = parent.getChildAt(childIndex); 37 | if (child instanceof TextView) { 38 | applyFont((TextView) child); 39 | } else if (child instanceof ViewGroup) { 40 | applyFonts((ViewGroup) child); 41 | } 42 | } 43 | } 44 | 45 | public static void applyFont(TextView textView) { 46 | if (textView.getTypeface() != null && textView.getTypeface().isBold()) { 47 | textView.setTypeface(getTypeface(textView.getContext(), FontStyle.BOLD)); 48 | } else { 49 | textView.setTypeface(getTypeface(textView.getContext(), FontStyle.REGULAR)); 50 | } 51 | } 52 | 53 | private static Typeface getTypeface(Context context, FontStyle style) { 54 | if (sTypefaceCache.containsKey(style)) { 55 | return sTypefaceCache.get(style); 56 | } else { 57 | try { 58 | final Typeface typeface = Typeface.createFromAsset(context.getAssets(), style.getFontPath()); 59 | sTypefaceCache.put(style, typeface); 60 | return typeface; 61 | } catch (Exception ex) { 62 | // Do nothing 63 | ex.printStackTrace(); 64 | } 65 | } 66 | return Typeface.defaultFromStyle(style == FontStyle.BOLD ? Typeface.BOLD : Typeface.NORMAL); 67 | } 68 | 69 | private enum FontStyle { 70 | REGULAR("fonts/opensans-regular.ttf"), 71 | BOLD("fonts/opensans-semibold.ttf"); 72 | 73 | private String mFontPath; 74 | 75 | FontStyle(String fontPath) { 76 | mFontPath = fontPath; 77 | } 78 | 79 | String getFontPath() { 80 | return mFontPath; 81 | } 82 | } 83 | 84 | } 85 | -------------------------------------------------------------------------------- /app/src/main/java/com/ledger/android/u2f/bridge/U2FHelper.java: -------------------------------------------------------------------------------- 1 | /* 2 | ******************************************************************************* 3 | * Android U2F USB Bridge 4 | * (c) 2016 Ledger 5 | * 6 | * Licensed under the Apache License, Version 2.0 (the "License"); 7 | * you may not use this file except in compliance with the License. 8 | * You may obtain a copy of the License at 9 | * 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * 12 | * Unless required by applicable law or agreed to in writing, software 13 | * distributed under the License is distributed on an "AS IS" BASIS, 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | * See the License for the specific language governing permissions and 16 | * limitations under the License. 17 | ********************************************************************************/ 18 | 19 | package com.ledger.android.u2f.bridge; 20 | 21 | import java.io.ByteArrayOutputStream; 22 | import java.io.IOException; 23 | 24 | public class U2FHelper { 25 | 26 | private static final int CHANNEL_BROADCAST = 0xffffffff; 27 | 28 | private int channel; 29 | 30 | public U2FHelper() { 31 | channel = CHANNEL_BROADCAST; 32 | } 33 | 34 | public int getChannel() { 35 | return channel; 36 | } 37 | 38 | public void setChannel(int channel) { 39 | this.channel = channel; 40 | } 41 | 42 | public byte[] wrapCommandAPDU(byte tag, byte[] command, int packetSize) throws IOException { 43 | ByteArrayOutputStream output = new ByteArrayOutputStream(); 44 | int sequenceIdx = 0; 45 | int offset = 0; 46 | output.write(channel >> 24); 47 | output.write(channel >> 16); 48 | output.write(channel >> 8); 49 | output.write(channel); 50 | output.write(tag); 51 | output.write(command.length >> 8); 52 | output.write(command.length); 53 | int blockSize = (command.length > packetSize - 7 ? packetSize - 7 : command.length); 54 | output.write(command, offset, blockSize); 55 | offset += blockSize; 56 | while (offset != command.length) { 57 | output.write(channel >> 24); 58 | output.write(channel >> 16); 59 | output.write(channel >> 8); 60 | output.write(channel); 61 | output.write(sequenceIdx); 62 | sequenceIdx++; 63 | blockSize = (command.length - offset > packetSize - 5 ? packetSize - 5 : command.length - offset); 64 | output.write(command, offset, blockSize); 65 | offset += blockSize; 66 | } 67 | if ((output.size() % packetSize) != 0) { 68 | byte[] padding = new byte[packetSize - (output.size() % packetSize)]; 69 | output.write(padding, 0, padding.length); 70 | } 71 | return output.toByteArray(); 72 | } 73 | 74 | public byte[] unwrapResponseAPDU(byte tag, byte[] data, int packetSize) throws IOException { 75 | ByteArrayOutputStream response = new ByteArrayOutputStream(); 76 | int offset = 0; 77 | int responseLength; 78 | int sequenceIdx = 0; 79 | int readChannel; 80 | if ((data == null) || (data.length < 7)) { 81 | return null; 82 | } 83 | readChannel = ((data[offset] & 0xff) << 24) | ((data[offset + 1] & 0xff) << 16) | ((data[offset + 2] & 0xff) << 8) | (data[offset + 3] & 0xff); 84 | if (readChannel != channel) { 85 | if (channel == CHANNEL_BROADCAST) { 86 | channel = readChannel; 87 | } 88 | else { 89 | throw new IOException("Invalid channel"); 90 | } 91 | } 92 | offset += 4; 93 | if (data[offset++] != tag) { 94 | throw new IOException("Invalid command"); 95 | } 96 | responseLength = ((data[offset++] & 0xff) << 8); 97 | responseLength |= (data[offset++] & 0xff); 98 | if (data.length < 7 + responseLength) { 99 | return null; 100 | } 101 | int blockSize = (responseLength > packetSize - 7 ? packetSize - 7 : responseLength); 102 | response.write(data, offset, blockSize); 103 | offset += blockSize; 104 | while (response.size() != responseLength) { 105 | if (offset == data.length) { 106 | return null; 107 | } 108 | readChannel = ((data[offset] & 0xff) << 24) | ((data[offset + 1] & 0xff) << 16) | ((data[offset + 2] & 0xff) << 8) | (data[offset + 3] & 0xff); 109 | offset += 4; 110 | if (readChannel != channel) { 111 | throw new IOException("Invalid channel"); 112 | } 113 | if (data[offset++] != sequenceIdx) { 114 | throw new IOException("Invalid sequence"); 115 | } 116 | blockSize = (responseLength - response.size() > packetSize - 5 ? packetSize - 5 : responseLength - response.size()); 117 | if (blockSize > data.length - offset) { 118 | return null; 119 | } 120 | response.write(data, offset, blockSize); 121 | offset += blockSize; 122 | sequenceIdx++; 123 | } 124 | return response.toByteArray(); 125 | } 126 | 127 | } 128 | -------------------------------------------------------------------------------- /app/src/main/java/com/ledger/android/u2f/bridge/U2FTransportAndroid.java: -------------------------------------------------------------------------------- 1 | /* 2 | ******************************************************************************* 3 | * Android U2F USB Bridge 4 | * (c) 2016 Ledger 5 | * 6 | * Licensed under the Apache License, Version 2.0 (the "License"); 7 | * you may not use this file except in compliance with the License. 8 | * You may obtain a copy of the License at 9 | * 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * 12 | * Unless required by applicable law or agreed to in writing, software 13 | * distributed under the License is distributed on an "AS IS" BASIS, 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | * See the License for the specific language governing permissions and 16 | * limitations under the License. 17 | ********************************************************************************/ 18 | 19 | package com.ledger.android.u2f.bridge; 20 | 21 | import android.app.PendingIntent; 22 | import android.content.BroadcastReceiver; 23 | import android.content.Context; 24 | import android.content.Intent; 25 | import android.content.IntentFilter; 26 | import android.hardware.usb.*; 27 | import android.util.Log; 28 | 29 | import java.util.HashMap; 30 | import java.util.concurrent.LinkedBlockingQueue; 31 | 32 | import com.ledger.android.u2f.bridge.utils.Dump; 33 | 34 | public class U2FTransportAndroid { 35 | 36 | private boolean stopped; 37 | private UsbManager usbManager; 38 | private U2FTransportAndroidHID transport; 39 | private final LinkedBlockingQueue gotRights = new LinkedBlockingQueue(1); 40 | 41 | private static final String LOG_TAG = "U2FTransportAndroid"; 42 | 43 | private static final String ACTION_USB_PERMISSION = "USB_PERMISSION"; 44 | 45 | /** 46 | * Receives broadcast when a supported USB device is attached, detached or 47 | * when a permission to communicate to the device has been granted. 48 | */ 49 | private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { 50 | @Override 51 | public void onReceive(Context context, Intent intent) { 52 | String action = intent.getAction(); 53 | UsbDevice usbDevice = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); 54 | String deviceName = usbDevice.getDeviceName(); 55 | 56 | if (ACTION_USB_PERMISSION.equals(action)) { 57 | boolean permission = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, 58 | false); 59 | // sync with connect 60 | gotRights.clear(); 61 | gotRights.add(permission); 62 | context.unregisterReceiver(mUsbReceiver); 63 | } 64 | } 65 | }; 66 | 67 | public U2FTransportAndroid(Context context) { 68 | usbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE); 69 | } 70 | 71 | public boolean isPluggedIn() { 72 | return getDevice(usbManager) != null; 73 | } 74 | 75 | public void markStopped() { 76 | stopped = true; 77 | } 78 | 79 | public U2FTransportAndroidHID getTransport() { 80 | return transport; 81 | } 82 | 83 | public boolean connect(final Context context, final U2FTransportFactoryCallback callback) { 84 | if (transport != null) { 85 | try { 86 | transport.close(); 87 | } catch (Exception e) { 88 | } 89 | } 90 | IntentFilter filter = new IntentFilter(); 91 | filter.addAction(ACTION_USB_PERMISSION); 92 | context.registerReceiver(mUsbReceiver, filter); 93 | 94 | 95 | final UsbDevice device = getDevice(usbManager); 96 | final Intent intent = new Intent(ACTION_USB_PERMISSION); 97 | 98 | gotRights.clear(); 99 | usbManager.requestPermission(device, PendingIntent.getBroadcast(context, 0, intent, 0)); 100 | // retry because of InterruptedException 101 | while (true) { 102 | try { 103 | // gotRights.take blocks until the UsbManager gives us the rights via callback to the BroadcastReceiver 104 | // this might need an user interaction 105 | if (gotRights.take()) { 106 | if (!stopped) { 107 | transport = open(usbManager, device); 108 | callback.onConnected((transport != null ? true : false)); 109 | } 110 | return true; 111 | } else { 112 | if (!stopped) { 113 | callback.onConnected(false); 114 | } 115 | return true; 116 | } 117 | } catch (InterruptedException ignored) { 118 | } 119 | } 120 | } 121 | 122 | public static UsbDevice getDevice(UsbManager manager) { 123 | HashMap deviceList = manager.getDeviceList(); 124 | for (UsbDevice device : deviceList.values()) { 125 | if ((device.getDeviceClass() == UsbConstants.USB_CLASS_HID) || (device.getDeviceClass() == UsbConstants.USB_CLASS_PER_INTERFACE)) { 126 | return device; 127 | } 128 | } 129 | return null; 130 | } 131 | 132 | private static final int LIBUSB_REQUEST_GET_DESCRIPTOR = 0x06; 133 | private static final int LIBUSB_DT_REPORT = 0x22; 134 | private static final int LIBUSB_RECIPIENT_INTERFACE = 0x01; 135 | 136 | 137 | private static int getBytes(byte[] data, int length, int size, int cur) { 138 | int result = 0; 139 | if (cur + size >= length) { 140 | return 0; 141 | } 142 | switch(size) { 143 | case 0: 144 | break; 145 | case 1: 146 | result = (data[cur + 1] & 0xff); 147 | break; 148 | case 2: 149 | result = ((data[cur + 2] & 0xff) << 8) | (data[cur + 1] & 0xff); 150 | break; 151 | case 3: 152 | result = ((data[cur + 4] & 0xff) << 24) | ((data[cur + 3] & 0xff) << 16) | ((data[cur + 2] & 0xff) << 8) | (data[cur + 1] & 0xff); 153 | break; 154 | } 155 | return result; 156 | } 157 | 158 | private static int getUsage(byte[] report) { 159 | return getUsagePageOrUsage(report, report.length, true); 160 | } 161 | 162 | private static int getUsagePage(byte[] report) { 163 | return getUsagePageOrUsage(report, report.length, false); 164 | } 165 | 166 | private static int getUsagePageOrUsage(byte[] data, int size, boolean getUsage) { 167 | int result = -1; 168 | int i = 0; 169 | int size_code; 170 | int data_len, key_size; 171 | while (i < size) { 172 | int key = (data[i] & 0xff); 173 | int key_cmd = key & 0xfc; 174 | if ((key & 0xf0) == 0xf0) { 175 | if (i + 1 < size) { 176 | data_len = data[i + 1]; 177 | } 178 | else { 179 | data_len = 0; 180 | } 181 | key_size = 3; 182 | } 183 | else { 184 | size_code = key & 0x03; 185 | switch(size_code) { 186 | case 0: 187 | case 1: 188 | case 2: 189 | data_len = size_code; 190 | break; 191 | case 3: 192 | data_len = 4; 193 | break; 194 | default: 195 | data_len = 0; 196 | break; 197 | } 198 | key_size = 1; 199 | } 200 | if ((key_cmd == 0x04) && !getUsage) { 201 | result = getBytes(data, size, data_len, i); 202 | break; 203 | } 204 | if ((key_cmd == 0x08) && getUsage) { 205 | result = getBytes(data, size, data_len, i); 206 | break; 207 | } 208 | i += data_len + key_size; 209 | } 210 | return result; 211 | } 212 | 213 | public static U2FTransportAndroidHID open(UsbManager manager, UsbDevice device) { 214 | // Must only be called once permission is granted (see http://developer.android.com/reference/android/hardware/usb/UsbManager.html) 215 | // Important if enumerating, rather than being awaken by the intent notification 216 | for (int interfaceIndex=0; interfaceIndex " + Dump.dump(command)); 92 | } 93 | command = helper.wrapCommandAPDU(tag, command, HID_BUFFER_SIZE); 94 | UsbRequest requestWrite = new UsbRequest(); 95 | if (!requestWrite.initialize(connection, out)) { 96 | throw new IOException(); 97 | } 98 | while (offset != command.length) { 99 | int blockSize = (command.length - offset > HID_BUFFER_SIZE ? HID_BUFFER_SIZE : command.length - offset); 100 | System.arraycopy(command, offset, transferBuffer, 0, blockSize); 101 | if (debug) { 102 | Log.d(LOG_TAG, "wire => " + Dump.dump(transferBuffer)); 103 | } 104 | if (!requestWrite.queue(ByteBuffer.wrap(transferBuffer), HID_BUFFER_SIZE)) { 105 | requestWrite.close(); 106 | throw new IOException(); 107 | } 108 | connection.requestWait(); 109 | offset += blockSize; 110 | } 111 | ByteBuffer responseBuffer = ByteBuffer.allocate(HID_BUFFER_SIZE); 112 | UsbRequest requestRead = new UsbRequest(); 113 | if (!requestRead.initialize(connection, in)) { 114 | requestRead.close(); 115 | requestWrite.close(); 116 | throw new IOException(); 117 | } 118 | while ((responseData = helper.unwrapResponseAPDU(tag, response.toByteArray(), HID_BUFFER_SIZE)) == null) { 119 | responseBuffer.clear(); 120 | if (!requestRead.queue(responseBuffer, HID_BUFFER_SIZE)) { 121 | requestRead.close(); 122 | requestWrite.close(); 123 | throw new IOException(); 124 | } 125 | connection.requestWait(); 126 | responseBuffer.rewind(); 127 | responseBuffer.get(transferBuffer, 0, HID_BUFFER_SIZE); 128 | if (debug) { 129 | Log.d(LOG_TAG, "wire <= " + Dump.dump(transferBuffer)); 130 | } 131 | response.write(transferBuffer, 0, HID_BUFFER_SIZE); 132 | } 133 | if (debug) { 134 | Log.d(LOG_TAG, "<= " + Dump.dump(responseData)); 135 | } 136 | 137 | requestWrite.close(); 138 | requestRead.close(); 139 | return responseData; 140 | } 141 | 142 | public void close() throws IOException { 143 | connection.releaseInterface(dongleInterface); 144 | connection.close(); 145 | } 146 | 147 | 148 | public void setDebug(boolean debugFlag) { 149 | this.debug = debugFlag; 150 | } 151 | 152 | private static final int HID_BUFFER_SIZE = 64; 153 | private static final int SW1_DATA_AVAILABLE = 0x61; 154 | } 155 | -------------------------------------------------------------------------------- /app/src/main/java/com/ledger/android/u2f/bridge/U2FTransportFactoryCallback.java: -------------------------------------------------------------------------------- 1 | /* 2 | ******************************************************************************* 3 | * Android U2F USB Bridge 4 | * (c) 2016 Ledger 5 | * 6 | * Licensed under the Apache License, Version 2.0 (the "License"); 7 | * you may not use this file except in compliance with the License. 8 | * You may obtain a copy of the License at 9 | * 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * 12 | * Unless required by applicable law or agreed to in writing, software 13 | * distributed under the License is distributed on an "AS IS" BASIS, 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | * See the License for the specific language governing permissions and 16 | * limitations under the License. 17 | ********************************************************************************/ 18 | 19 | package com.ledger.android.u2f.bridge; 20 | 21 | public interface U2FTransportFactoryCallback { 22 | 23 | public void onConnected(boolean success); 24 | 25 | } 26 | -------------------------------------------------------------------------------- /app/src/main/java/com/ledger/android/u2f/bridge/utils/Dump.java: -------------------------------------------------------------------------------- 1 | /* 2 | ******************************************************************************* 3 | * Android U2F USB Bridge 4 | * (c) 2016 Ledger 5 | * 6 | * Licensed under the Apache License, Version 2.0 (the "License"); 7 | * you may not use this file except in compliance with the License. 8 | * You may obtain a copy of the License at 9 | * 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * 12 | * Unless required by applicable law or agreed to in writing, software 13 | * distributed under the License is distributed on an "AS IS" BASIS, 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | * See the License for the specific language governing permissions and 16 | * limitations under the License. 17 | ********************************************************************************/ 18 | 19 | package com.ledger.android.u2f.bridge.utils; 20 | 21 | import java.io.ByteArrayOutputStream; 22 | 23 | public class Dump { 24 | 25 | public static String dump(byte[] buffer, int offset, int length) { 26 | String result = ""; 27 | for (int i=0; i= '0' && x <= '9') || (x >= 'A' && x <= 'F') || (x >= 'a' && x <= 'f'))) { 47 | i++; 48 | continue; 49 | } 50 | try { 51 | result.write(Integer.valueOf("" + src.charAt(i) + src.charAt(i + 1), 16)); 52 | i += 2; 53 | } 54 | catch (Exception e) { 55 | return null; 56 | } 57 | } 58 | return result.toByteArray(); 59 | } 60 | 61 | } 62 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/res/drawable-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/res/drawable-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-v21/bg_green_button.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-v21/bg_grey_button.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/res/drawable-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/res/drawable-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LedgerHQ/android-u2f-bridge/7091ab4392fdcd310ff27b27f1d4ff21d275d2cf/app/src/main/res/drawable-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/bg_edittext.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 8 | 9 | 14 | 15 | 19 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/bg_green_button.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/bg_grey_button.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/bg_window.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 11 | 12 | 16 | 17 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | -------------------------------------------------------------------------------- /app/src/main/res/layout/content_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 13 | 14 | 23 | 24 | 35 | 36 |