Exemplo n.º 1
0
 public void updateLeafData(int index, Indexable b) {
   // Check to see if we need to grow tree
   if (index <= root.max) {
     // node already exists, simply update
     store.set(index, b);
     MerkleTreeNode node = nodeMap.get(index);
     MerkleTreeNode newNode = new MerkleTreeNode(b.getBytes(), index);
     newNode.parent = node.parent;
     if (newNode.parent.leftChild == node) {
       newNode.parent.leftChild = newNode;
     } else {
       newNode.parent.rightChild = newNode;
     }
     markChainDirty(newNode);
   } else {
     // node is beyond our scope, grow tree
     while (index > root.max) {
       Vector<Indexable> vec = new Vector<Indexable>();
       int origSize = store.size();
       for (int i = origSize; i < 2 * origSize; i++) {
         if (i == index) {
           vec.add(i - origSize, b);
         } else {
           vec.add(i - origSize, null);
         }
       }
       MerkleTree newtree = new MerkleTree(vec);
       root = MerkleTreeNode.combineDigestFactory(root, newtree.root);
       for (int i = origSize; i < 2 * origSize; i++) {
         MerkleTreeNode tempNode = newtree.nodeMap.get(i - origSize);
         tempNode.max += origSize;
         tempNode.min += origSize;
         nodeMap.put(i, tempNode);
         store.add(i, newtree.store.get(i - origSize));
       }
     }
   }
 }
Exemplo n.º 2
0
  public static void main(String[] args) {
    Vector<Indexable> files = new Vector<Indexable>();
    for (int i = 0; i < 5; i++) {
      files.add(new BFTFile(new String("Taylor" + i)));
    }
    MerkleTree tree = new MerkleTree(files);
    // System.out.println(tree.getRoot().min + ":" + tree.getRoot().max);
    BFT.util.UnsignedTypes.printBytes(tree.getRoot().getBytes());

    // System.out.println("Changing a leaf!");
    BFTFile newFile = new BFTFile(new String("Hello World!"));
    tree.updateLeafData(3, newFile);
    tree.update();
    // System.out.println(tree.getRoot().min + ":" + tree.getRoot().max);
    BFT.util.UnsignedTypes.printBytes(tree.getRoot().getBytes());

    // System.out.println("Adding a leaf past the current capacity!");
    newFile = new BFTFile(new String("Goodbye Cruel World!"));
    tree.updateLeafData(12, newFile);
    tree.update();
    // System.out.println(tree.getRoot().min + ":" + tree.getRoot().max);
    BFT.util.UnsignedTypes.printBytes(tree.getRoot().getBytes());

    // System.out.println("Changing a leaf!");
    newFile = new BFTFile(new String("Hello World!"));
    tree.updateLeafData(14, newFile);
    tree.update();
    // System.out.println(tree.getRoot().min + ":" + tree.getRoot().max);
    BFT.util.UnsignedTypes.printBytes(tree.getRoot().getBytes());

    // System.out.println("Adding a leaf past the current capacity!");
    newFile = new BFTFile(new String("Goodbye Cruel World!"));
    tree.updateLeafData(49, newFile);
    tree.update();
    // System.out.println(tree.getRoot().min + ":" + tree.getRoot().max);
    BFT.util.UnsignedTypes.printBytes(tree.getRoot().getBytes());

    System.out.print("Testing leaf node retrieval 1: ");
    MerkleTreeNode test = new MerkleTreeNode(12);
    MerkleTreeNode test1 = tree.getNode(12);
    if (test.equals(test1)) {
      // System.out.println("FAIL");
      BFT.util.UnsignedTypes.printBytes(test.getBytes());
      // System.out.println();
      BFT.util.UnsignedTypes.printBytes(test1.getBytes());
    } else {
      // System.out.println("WIN");
    }

    System.out.print("Testing leaf node retrieval 2 (");
    newFile = (BFTFile) tree.getLeafData(49);
    System.out.print(newFile.getFilename() + "): ");
    test = new MerkleTreeNode(newFile.getBytes(), 49);
    test1 = tree.getNode(49);
    if (test.equals(test1)) {
      // System.out.println("WIN");
    } else {
      // System.out.println("FAIL");
      BFT.util.UnsignedTypes.printBytes(test.getBytes());
      // System.out.println();
      BFT.util.UnsignedTypes.printBytes(test1.getBytes());
    }

    System.out.print("Testing intermediate node retrieval (52,53): ");
    try {
      test = tree.getNode(52, 53);
      // if(test.min == 52 && test.max == 53) //System.out.println("WIN");
      // else //System.out.println("FAIL");
    } catch (NotInTreeException e3) {
      // System.out.println("FAIL");
    }

    System.out.print("Testing tree equality 1: ");
    Vector<Indexable> files1 = new Vector<Indexable>();
    for (int i = 0; i < 5; i++) {
      files1.add(new BFTFile(new String("Taylor" + i)));
    }
    Vector<Indexable> files2 = new Vector<Indexable>();
    for (int i = 0; i < 5; i++) {
      files2.add(new BFTFile(new String("Taylor" + i)));
    }
    MerkleTree tree1 = new MerkleTree(files1);
    MerkleTree tree2 = new MerkleTree(files2);
    if (tree1.getRoot().equals(tree2.getRoot())) // System.out.println("WIN");
      // else //System.out.println("FAIL");

      System.out.print("Testing tree equality 2: ");
    tree2.updateLeafData(7, new BFTFile(new String("IGGY IGGY")));
    tree2.update();
    if (!tree1.getRoot().equals(tree2.getRoot())) // System.out.println("WIN");
      // else //System.out.println("FAIL");

      System.out.print("Testing tree equality 3: ");
    MerkleTreeNode pullNode = null;
    try {
      pullNode = tree1.getNode(0, 3);
      // if(tree2.equals(pullNode)) //System.out.println("WIN");
      // else //System.out.println("FAIL");
    } catch (NotInTreeException e2) {
      // System.out.println("FAIL");
    }

    System.out.print("Testing tree equality 4: ");
    try {
      pullNode = tree1.getNode(0, 3);
      byte[] token = pullNode.getToken();
      // if(tree2.equals(token)) //System.out.println("WIN");
      // else //System.out.println("FAIL");
    } catch (NotInTreeException e1) {
      // System.out.println("FAIL");
    }

    System.out.print("Testing get methods 1: ");
    try {
      pullNode = tree1.getNode(32, 33);
      // System.out.println("FAIL");
    } catch (NotInTreeException e) {
      // System.out.println("WIN");
    }

    System.out.print("Testing get methods 2: ");
    tree1.updateLeafData(33, new BFTFile(new String("IGGY IGGY")));
    try {
      pullNode = tree1.getNode(32, 33);
      // System.out.println("WIN");
    } catch (NotInTreeException e) {
      // System.out.println("FAIL");
    }

    System.out.print("Testing get methods 3: ");
    if (pullNode.min == 32 && pullNode.max == 33) {
      // System.out.println("WIN");
    } else {
      // System.out.println("FAIL");
    }
  }
Exemplo n.º 3
0
 public Indexable getLeafData(int index) {
   return store.get(index);
 }
Exemplo n.º 4
0
 public MerkleTree(Vector<Indexable> v) {
   nodeMap = new HashMap<Integer, MerkleTreeNode>();
   this.store = v;
   int exp = 0;
   while ((int) Math.pow(2, exp) < store.size()) {
     exp++;
   }
   for (int i = store.size(); i < (int) Math.pow(2, exp); i++) {
     store.add(i, null);
   }
   Vector<MerkleTreeNode> hashes = new Vector<MerkleTreeNode>();
   for (int i = 0; i < store.size(); i++) {
     if (store.get(i) != null) {
       MerkleTreeNode temp = new MerkleTreeNode(store.get(i).getBytes(), i);
       nodeMap.put(i, temp);
       hashes.add(temp);
     } else {
       MerkleTreeNode temp = new MerkleTreeNode(i);
       nodeMap.put(i, temp);
       hashes.add(temp);
     }
   }
   while (hashes.size() > 1) {
     Vector<MerkleTreeNode> temp = new Vector<MerkleTreeNode>();
     for (int i = 0; i < hashes.size(); i += 2) {
       temp.add(MerkleTreeNode.combineDigestFactory(hashes.get(i), hashes.get(i + 1)));
     }
     hashes = temp;
   }
   root = hashes.get(0);
 }