Added KeyInfo class

app/src/main/java/me/impy/aegis/ScannerActivity.java

@@ -16,6 +16,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import me.dm7.barcodescanner.zxing.ZXingScannerView;
+import me.impy.aegis.crypto.KeyInfo;
 
 public class ScannerActivity extends Activity implements ZXingScannerView.ResultHandler {
     private ZXingScannerView mScannerView;
@@ -26,7 +27,7 @@ public class ScannerActivity extends Activity implements ZXingScannerView.Result
         mScannerView = new ZXingScannerView(this);   // Programmatically initialize the scanner view
         setContentView(mScannerView);                // Set the scanner view as the content view
         mScannerView.setFormats(getSupportedFormats());
-        mScannerView.
+
         ActivityCompat.requestPermissions(ScannerActivity.this, new String[]{Manifest.permission.CAMERA}, 1);
     }
 
@@ -44,8 +45,14 @@ public class ScannerActivity extends Activity implements ZXingScannerView.Result
     @Override
     public void handleResult(Result rawResult) {
         // Do something with the result here
-        Log.v("Aegis ", rawResult.getText()); // Prints scan results
-        Log.v("Aegis ", rawResult.getBarcodeFormat().toString()); // Prints the scan format (qrcode, pdf417 etc.)
+        Toast.makeText(this, rawResult.getText(), Toast.LENGTH_SHORT).show();
+
+        try {
+            KeyInfo info = KeyInfo.FromURL(rawResult.getText());
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
 
         // If you would like to resume scanning, call this method below:
         mScannerView.resumeCameraPreview(this);

app/src/main/java/me/impy/aegis/crypto/KeyInfo.java

@@ -0,0 +1,42 @@
+package me.impy.aegis.crypto;
+
+import android.net.Uri;
+
+import me.impy.aegis.encoding.Base32;
+
+public class KeyInfo {
+    private String _type;
+    private String _label;
+    private byte[] _secret;
+    private String _issuer;
+    private String _algo;
+    private int _digits;
+    private long _counter;
+    private String _period;
+
+    private KeyInfo() {
+
+    }
+
+    public static KeyInfo FromURL(String s) throws Exception {
+        final Uri url = Uri.parse(s);
+
+        if (!url.getScheme().equals("otpauth")) {
+            throw new Exception("unsupported protocol");
+        }
+
+        KeyInfo info = new KeyInfo();
+        info._type = url.getHost();
+
+        String secret = url.getQueryParameter("secret");
+        info._secret = Base32.decode(secret);
+        info._issuer = url.getQueryParameter("issuer");
+        info._label = url.getPath();
+        info._algo = url.getQueryParameter("algorithm");
+        info._period = url.getQueryParameter("period");
+        info._digits = url.getQueryParameter("digits") != null ? Integer.getInteger(url.getQueryParameter("digits")) : 6;
+        info._counter = url.getQueryParameter("counter") != null ? Long.getLong(url.getQueryParameter("counter")) : 0;
+
+        return info;
+    }
+}

app/src/main/java/me/impy/aegis/encoding/Base32.java

@@ -0,0 +1,147 @@
+package me.impy.aegis.encoding;
+
+/* (PD) 2001 The Bitzi Corporation
+ * Please see http://bitzi.com/publicdomain for more info.
+ *
+ * As modified by Patrick Woodworth:
+ *
+ * Copyright 2011 Patrick Woodworth
+ *
+ * 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.
+ */
+
+import java.io.UnsupportedEncodingException;
+
+/**
+ * Base32 - encodes and decodes RFC3548 Base32
+ * (see http://www.faqs.org/rfcs/rfc3548.html )
+ *
+ * @author Robert Kaye
+ * @author Gordon Mohr
+ */
+public class Base32 {
+    private static final String base32Chars =
+            "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+    private static final int[] base32Lookup =
+            { 0xFF,0xFF,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F, // '0', '1', '2', '3', '4', '5', '6', '7'
+                    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, // '8', '9', ':', ';', '<', '=', '>', '?'
+                    0xFF,0x00,0x01,0x02,0x03,0x04,0x05,0x06, // '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G'
+                    0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E, // 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O'
+                    0x0F,0x10,0x11,0x12,0x13,0x14,0x15,0x16, // 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W'
+                    0x17,0x18,0x19,0xFF,0xFF,0xFF,0xFF,0xFF, // 'X', 'Y', 'Z', '[', '\', ']', '^', '_'
+                    0xFF,0x00,0x01,0x02,0x03,0x04,0x05,0x06, // '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g'
+                    0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E, // 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o'
+                    0x0F,0x10,0x11,0x12,0x13,0x14,0x15,0x16, // 'p', 'q', 'r', 's', 't', 'u', 'v', 'w'
+                    0x17,0x18,0x19,0xFF,0xFF,0xFF,0xFF,0xFF  // 'x', 'y', 'z', '{', '|', '}', '~', 'DEL'
+            };
+
+    public static byte[] encode(byte[] data) throws UnsupportedEncodingException {
+        String lower = encodeOriginal(data).toLowerCase();
+        return lower.getBytes("US-ASCII");
+    }
+
+    public static byte[] decodeModified(String data) {
+        return decode(data.replace('8', 'L').replace('9', 'O'));
+    }
+
+
+    /**
+     * Encodes byte array to Base32 String.
+     *
+     * @param bytes Bytes to encode.
+     * @return Encoded byte array <code>bytes</code> as a String.
+     *
+     */
+    static public String encodeOriginal(final byte[] bytes) {
+        int i = 0, index = 0, digit = 0;
+        int currByte, nextByte;
+        StringBuffer base32 = new StringBuffer((bytes.length + 7) * 8 / 5);
+
+        while (i < bytes.length) {
+            currByte = (bytes[i] >= 0) ? bytes[i] : (bytes[i] + 256); // unsign
+
+            /* Is the current digit going to span a byte boundary? */
+            if (index > 3) {
+                if ((i + 1) < bytes.length) {
+                    nextByte =
+                            (bytes[i + 1] >= 0) ? bytes[i + 1] : (bytes[i + 1] + 256);
+                } else {
+                    nextByte = 0;
+                }
+
+                digit = currByte & (0xFF >> index);
+                index = (index + 5) % 8;
+                digit <<= index;
+                digit |= nextByte >> (8 - index);
+                i++;
+            } else {
+                digit = (currByte >> (8 - (index + 5))) & 0x1F;
+                index = (index + 5) % 8;
+                if (index == 0)
+                    i++;
+            }
+            base32.append(base32Chars.charAt(digit));
+        }
+
+        return base32.toString();
+    }
+
+    /**
+     * Decodes the given Base32 String to a raw byte array.
+     *
+     * @param base32
+     * @return Decoded <code>base32</code> String as a raw byte array.
+     */
+    static public byte[] decode(final String base32) {
+        int i, index, lookup, offset, digit;
+        byte[] bytes = new byte[base32.length() * 5 / 8];
+
+        for (i = 0, index = 0, offset = 0; i < base32.length(); i++) {
+            lookup = base32.charAt(i) - '0';
+
+            /* Skip chars outside the lookup table */
+            if (lookup < 0 || lookup >= base32Lookup.length) {
+                continue;
+            }
+
+            digit = base32Lookup[lookup];
+
+            /* If this digit is not in the table, ignore it */
+            if (digit == 0xFF) {
+                continue;
+            }
+
+            if (index <= 3) {
+                index = (index + 5) % 8;
+                if (index == 0) {
+                    bytes[offset] |= digit;
+                    offset++;
+                    if (offset >= bytes.length)
+                        break;
+                } else {
+                    bytes[offset] |= digit << (8 - index);
+                }
+            } else {
+                index = (index + 5) % 8;
+                bytes[offset] |= (digit >>> index);
+                offset++;
+
+                if (offset >= bytes.length) {
+                    break;
+                }
+                bytes[offset] |= digit << (8 - index);
+            }
+        }
+        return bytes;
+    }
+}