PasswordCrackerBF.java

package org.ripple.power.password;

import java.util.Arrays;

public class PasswordCrackerBF {

	private char[] charSet;
	private char[] currentPass;

	public void init(char[] charS, String from) {
		charSet = charS;
		currentPass = from.toCharArray();
	}

	public String toString() {
		return String.valueOf(currentPass);
	}

	public String next() {
		nextGuess();
		return String.valueOf(currentPass);
	}

	public void nextGuess() {
		int index = currentPass.length - 1;
		for (; index >= 0;) {
			if (currentPass[index] == charSet[charSet.length - 1]) {
				if (index == 0) {
					currentPass = new char[currentPass.length];
					Arrays.fill(currentPass, charSet[0]);
					break;
				} else {
					currentPass[index] = charSet[0];
					index--;
				}
			} else {
				int i;
				for (i = 0; i < charSet.length; i++) {
					if (currentPass[index] == charSet[i]) {
						currentPass[index] = charSet[i + 1];
						break;
					}
				}
				break;
			}
		}
	}

}