com.nulabinc.zxcvbn.guesses.SequenceGuess Maven / Gradle / Ivy

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This is a java port of zxcvbn, which is a JavaScript password strength generator.

There is a newer version: 1.9.0

package com.nulabinc.zxcvbn.guesses;

import com.nulabinc.zxcvbn.matchers.Match;

import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;

public class SequenceGuess extends BaseGuess {

    private final static List START_POINTS = Arrays.asList(new Character[]{'a', 'A', 'z', 'Z', '0', '1', '9'});

    @Override
    public double exec(Match match) {
        final char firstChr = match.token.charAt(0);
        double baseGuesses;
        if (START_POINTS.contains(firstChr)) {
            baseGuesses = 4;
        } else {
            if (Pattern.compile("\\d").matcher(String.valueOf(firstChr)).find()) {
                baseGuesses = 10;
            } else {
                baseGuesses = 26;
            }
        };
        if (!match.ascending) baseGuesses *= 2;
        return baseGuesses * match.tokenLength();
    }
}