it-sicherheit lab02 determineKey()

XorAndCompressCracker.java

	public int[] determineKey(int keylength, int depth) throws IOException {
		totalNumberOfKeysToTest = getNumberOfCandidateKeys(keylength, depth);
		numberOfKeysTested = 0;
		ByteFrequencyTable[] frequencyTable = getFrequencyTableForKeyLength(keylength); 
		int[] key = null;

		//TODO
		KeyGenerator gen = new KeyGenerator(frequencyTable, depth, 0);

		while ((key = gen.getNextCandidateKey()) != null) {
			if(encryptedZipFile.tryDecryption(key)) {
				return key;
			}
		}

		return key;
	}