コード例 #1
0
  private void init(int layers, int[] heightOfTrees, int[] winternitzParameter, int[] K)
      throws IllegalArgumentException {
    boolean valid = true;
    String errMsg = "";
    this.numOfLayers = layers;
    if ((numOfLayers != winternitzParameter.length)
        || (numOfLayers != heightOfTrees.length)
        || (numOfLayers != K.length)) {
      valid = false;
      errMsg = "Unexpected parameterset format";
    }
    for (int i = 0; i < numOfLayers; i++) {
      if ((K[i] < 2) || ((heightOfTrees[i] - K[i]) % 2 != 0)) {
        valid = false;
        errMsg = "Wrong parameter K (K >= 2 and H-K even required)!";
      }

      if ((heightOfTrees[i] < 4) || (winternitzParameter[i] < 2)) {
        valid = false;
        errMsg = "Wrong parameter H or w (H > 3 and w > 1 required)!";
      }
    }

    if (valid) {
      this.heightOfTrees = Arrays.clone(heightOfTrees);
      this.winternitzParameter = Arrays.clone(winternitzParameter);
      this.K = Arrays.clone(K);
    } else {
      throw new IllegalArgumentException(errMsg);
    }
  }
コード例 #2
0
ファイル: SCrypt.java プロジェクト: dfdenni/ripple-lib-java
  private static void SMix(int[] B, int BOff, int N, int r) {
    int BCount = r * 32;

    int[] blockX1 = new int[16];
    int[] blockX2 = new int[16];
    int[] blockY = new int[BCount];

    int[] X = new int[BCount];
    int[][] V = new int[N][];

    try {
      System.arraycopy(B, BOff, X, 0, BCount);

      for (int i = 0; i < N; ++i) {
        V[i] = Arrays.clone(X);
        BlockMix(X, blockX1, blockX2, blockY, r);
      }

      int mask = N - 1;
      for (int i = 0; i < N; ++i) {
        int j = X[BCount - 16] & mask;
        Xor(X, V[j], 0, X);
        BlockMix(X, blockX1, blockX2, blockY, r);
      }

      System.arraycopy(X, 0, B, BOff, BCount);
    } finally {
      ClearAll(V);
      ClearAll(new int[][] {X, blockX1, blockX2, blockY});
    }
  }
コード例 #3
0
 /**
  * Returns the parameter K needed for authentication path computation
  *
  * @return The parameter K needed for authentication path computation
  */
 public int[] getK() {
   return Arrays.clone(K);
 }
コード例 #4
0
 /**
  * Returns the array of WinternitzParameter (for each layer) of the authentication trees
  *
  * @return The array of WinternitzParameter (for each layer) of the authentication trees
  */
 public int[] getWinternitzParameter() {
   return Arrays.clone(winternitzParameter);
 }
コード例 #5
0
 /**
  * Returns the array of height (for each layer) of the authentication trees
  *
  * @return The array of height (for each layer) of the authentication trees
  */
 public int[] getHeightOfTrees() {
   return Arrays.clone(heightOfTrees);
 }