Example #1
0
  // This finds the final sums of iR[i]
  private int findSumiRi() {
    int[] sum = new int[29];
    int length = 28;

    // Find iRi
    int[] iR = new int[29];

    for (int i = 0; i < 29; i++) iR[i] = M.myMod((i * R[i]), 29);

    // System.out.print("iRi: ");
    // for(int i = 0; i < 29; i++)
    // System.out.print(iR[i] + " ");
    // System.out.println();

    for (int i = 0; i < 29; i++) sum[i] = iR[i];

    for (int j = 0; j < 28; j++) {
      for (int i = 0; i < length; i++) {
        sum[i] = sum[i + 1] - sum[i];
        sum[i] = M.myMod(sum[i], 29);
        // System.out.print(sum[i] + " ");
      }
      length = length - 1;
      // System.out.println();
    }
    return sum[0];
  }
Example #2
0
 // Main method just calls various functions and prints messages
 public static void main(String[] args) throws IOException {
   M.getFileInput();
   M.processAllBlocks();
   M.writeFile();
   M.checkForError();
   System.out.println("\nRecieved Message: " + message);
   System.out.println("Decoded Message: " + decodedMessage);
 }
Example #3
0
  // This finds the final sums of EiRi[] and stores it in RiEiLeading[]
  private void findSums(int[] myArray) // This is for RiEi
      {
    int[] sum = myArray;
    int length = 28;

    /*
     * System.out.print("Ri: "); // Delete Later for(int i = 0; i < 29; i++)
     * System.out.print(R[i] + ", "); System.out.println();
     *
     * System.out.print("Ei: "); // Delete Later for(int i = 0; i < 29; i++)
     * System.out.print(Ei[i] + ", "); System.out.println("\n");
     *
     * System.out.print("RiEi: "); for(int i = 0; i < 29; i++)
     * System.out.print(myArray[i] + ", "); System.out.println();
     */

    RiEiLeading[0] = myArray[0];

    for (int j = 0; j < 28; j++) {
      for (int i = 0; i < length; i++) {
        sum[i] = sum[i + 1] - sum[i];
        sum[i] = M.myMod(sum[i], 29);
        // System.out.print(sum[i] + " ");
      }
      RiEiLeading[j + 1] = sum[0];
      length--;
    }
  }
Example #4
0
  private void findRiandEiandEiRi() {
    // FIND EI AND RIEI
    for (int j = 0; j < 29; j++) {
      Ei[j] = (j + (alpha + 29)) % 29;
      RiEi[j] = (Ei[j] * R[j]) % 29;
    }

    // FIND LEADING COEFFECIENTs FOR ALL SUMS OF RIEI
    M.findSums(RiEi);
  }
Example #5
0
  // For each block, this finds E(t), Q(t), P(t)
  private void processAllBlocks() {
    for (int i = 0; i < message.length() / 29; i++) {
      System.out.print("\nFor block #" + i);
      M.convert();
      M.getRiAndiRi(i);
      M.findAlpha(i);
      M.findRiandEiandEiRi();
      M.alterCArray();

      M.buildQ();
      M.buildP();
      M.printP();

      start = start + 29;

      // RESET EVERYTHING
      Q = new int[28];
      P = new int[27];
      R = new int[29];
    }
  }
Example #6
0
  // This finds the final sums of R[i]
  private int findSumRi() {
    int[] sum = new int[29];
    int length = 28;

    for (int i = 0; i < 29; i++) sum[i] = R[i];

    // System.out.print("Ri: ");
    // for(int i = 0; i < 29; i++)
    // System.out.print(R[i] + " "); // WAS System.out.print(R[i + start] +
    // " ");

    System.out.println();

    for (int j = 0; j < 28; j++) {
      for (int i = 0; i < length; i++) {
        sum[i] = sum[i + 1] - sum[i];
        sum[i] = M.myMod(sum[i], 29);
        // System.out.print(sum[i] + " ");
      }
      length = length - 1;
      // System.out.println();
    }
    return sum[0];
  }
Example #7
0
 // This multiplies each leading sum of RiEi with each of the corresponding
 // C_K value and stores it in alteredCArrays
 private void alterCArray() {
   for (int k = 0; k < 28; k++) alteredCArrays[k] = M.multiplyArray(RiEiLeading[k], cArrays[k]);
 }
Example #8
0
 // This calls the other methods to get the finalSums of Ri and iRi
 private void getRiAndiRi(int i) {
   finalSumRi[i] = M.findSumRi();
   finalSumiRi[i] = M.findSumiRi();
 }