Merge pull request #5 from flocke/master

Add a export script for the pure XML files

README.md

@@ -10,12 +10,23 @@ __Be sure to understand the security implications of backing up the secrets from
 
 # Instructions
 
+## ADB Backup
+
 Make an adb backup of FreeOTP, (details on how to do this are currenly left as an excercise for the reader. While you are doing the backup, consider the above warning!). Open the adb backup file (.ab) with this app. Read the displayed qrcodes with the authenticator app on your other phone.
 
 The author has tested the app with current Google Chrome and Mozilla Firefox on Ubuntu 16.04 in April 2017. Other browsers probably do not work. Generated qrcodes have been succesfully imported in FreeOTP and Google Authenticator on Android and Microsoft Authenticator on Windows Phone 8, Windows Phone 10 and Android.
 
 This app can be opened directly at https://rawgit.com/viljoviitanen/freeotp-export/master/export.html 
 
+## XML Backup
+
+If your phone is already rooted you can directly backup the XML file containing all your accounts.
+Just use a root explorer to copy the tokens.xml file from `/data/data/org.fedorahosted.freeotp/shared_prefs/tokens.xml` to your phones internal storage.
+From there you can copy it onto you PC any way you like.
+Open the tokens.xml file with this app. Read the displayed qrcodes with the authenticator app on your other phone.
+
+This app can be opened directly at https://rawgit.com/viljoviitanen/freeotp-export/master/export-xml.html
+
 # Acknowledgements
 
 Based on https://github.com/philipsharp/FreeOTPDecoder (Apache license)

export-xml.html

@@ -0,0 +1,141 @@
+<!--
+ * Based on php code by Philip Sharp, converted to javascript by Viljo Viitanen
+ *
+ * FreeOTP Decoder Javascript
+ * 
+ * Copyright 2015 Philip Sharp, Viljo Viitanen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+
+-->
+<style>
+p{margin:50px}
+div{margin:10px}
+</style>
+<script src="https://rawgit.com/viljoviitanen/pako/master/dist/pako_inflate.js"></script>
+<script src="https://rawgit.com/viljoviitanen/js-untar/master/build/dist/untar.js"></script>
+<script src="https://rawgit.com/viljoviitanen/qrcodejs/master/qrcode.min.js"></script>
+<script type="text/javascript">
+
+//ported from original PHP function
+/**
+ * Convert stored secret into otpauth URI parameter
+ *
+ * Port of encodeInternal() method from Google Authenticator via FreeOTP
+ * @link https://fedorahosted.org/freeotp/browser/android/app/src/main/java/com/google/android/apps/authenticator/Base32String.java
+ *
+ * @param array $data Internal representation of the secret as byte array
+ * @return string Secret as Base32 encode string
+ */
+function encodeSecretBytes(data) {
+    DIGITS = ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','2','3','4','5','6','7','']; // 32 chars
+    SHIFT = 5; // trailing zeros in binary representation of the size of the alphabet
+    MASK = 31; // one less than size of alphabet
+    
+    // SHIFT is the number of bits per output character, so the length of the
+    // output is the length of the input multiplied by 8/SHIFT, rounded up.
+    if (data.length >= (1 << 28)) {
+        alert('Bad Secret');
+    }
+    outputLength = (data.length * 8 + SHIFT - 1) / SHIFT;
+    result = '';
+    buffer = data[0];
+    next = 1;
+    bitsLeft = 8;
+    while (bitsLeft > 0 || next < data.length) {
+        if (bitsLeft < SHIFT) {
+            if (next < data.length) {
+                buffer <<= 8;
+                buffer |= (data[next++] & 0xff);
+                bitsLeft += 8;
+            } else {
+                pad = SHIFT - bitsLeft;
+                buffer <<= pad;
+                bitsLeft += pad;
+            }
+        }
+        index = MASK & (buffer >> (bitsLeft - SHIFT));
+        bitsLeft -= SHIFT;
+        result += DIGITS[index];
+    }
+    return result;
+}
+
+//small helper function
+function querydata(p)
+{
+  var r= [];
+  for (var d in p) {
+    r.push(encodeURIComponent(d)+"="+encodeURIComponent(p[d]));
+  }
+  return r.join("&");
+}
+
+function parsexml(param) {
+  parser = new DOMParser();
+  xml=parser.parseFromString(param, "text/xml");
+  s=xml.getElementsByTagName('string');
+  if (s.length==0) {
+    alert('Cannot parse the file');
+  }
+  for (var i = 0, len = s.length; i < len; i++) {
+    name=s[i].attributes['name'].value;
+    if (name == 'tokenOrder') {
+      continue;
+    }
+    j=JSON.parse(s[i].textContent);
+    console.log(j);
+    issuer = j['issuerInt'] ? j['issuerInt'] : j['issuerExt'];
+    issuer = issuer ? issuer : j['issuerAlt'];
+    issuer = issuer ? issuer : j['labelAlt'];
+    issuer = issuer ? issuer : 'Unknown'+i;
+    param={
+      'secret'    : encodeSecretBytes(j['secret']),
+      'issuer'    : issuer,
+      'algorithm' : j['algo'],
+      'digits'    : j['digits'],
+      'period'    : j['period'],
+    }
+    label = (j['issuerExt']) ? j['issuerExt']+':'+j['label'] : j['label'];
+    uri='otpauth://'+j['type'].toLowerCase()+'/'+encodeURIComponent(label)+'?'+querydata(param);
+    console.log(uri);
+    document.getElementById("file").insertAdjacentHTML('afterend', '<p><div>'+name+'</div><div id="'+i+'"></div>' );
+    new QRCode(document.getElementById(i),uri);
+  }
+}
+ 
+var decoder = new TextDecoder();
+if (!decoder) {
+   alert ("error: browser does not support TextDecoder")
+}
+
+var reader = new FileReader();
+
+
+function onChange(event) {
+  var file = event.target.files[0];
+  var reader = new FileReader();
+  reader.onload = function(event) {
+    var text = event.target.result;
+    parsexml(text);
+  };
+
+  reader.readAsText(file);
+}
+
+</script>
+
+<a href="https://github.com/viljoviitanen/freeotp-export">Instructions at GitHub</a>
+<br>
+FreeOTP XML file: <input id="file" type="file" onchange="onChange(event)">
+