private static void tryKeyAt(char ch, int row, int col) {
String cipherText = cipherTexts.get(row);
printChangesInCell(-1, col);
key[col] = CryptoHelpers.xorCharAt(cipherText, ch, col);
printChangesInCell(-1, col);
for (int i = 0; i < possibleLetters.length; i++) {
printChangesInCell(i, col);
resultLetters[i][col] = CryptoHelpers.xorCharAt(cipherTexts.get(i), key[col], col);
printChangesInCell(i, col);
}
}
private static void calculateXorsGrid() {
if (DEBUG) System.out.println(cipherTexts.get(cipherTexts.size() - 1));
for (int i = 0; i < possibleLetters.length; i++) {
String currText = cipherTexts.get(i);
String currTextXorResult =
CryptoHelpers.xorHex(currText, cipherTexts.get(cipherTexts.size() - 1));
String xorText = CryptoHelpers.fromHex(currTextXorResult);
if (DEBUG) System.out.println(currText + "\n" + xorText);
for (int j = 0; j < possibleLetters[0].length && j < xorText.length(); j++)
possibleLetters[i][j] = xorText.charAt(j);
}
}