}

    /**
<<<<<<< HEAD
     * Check to see if a password matches any of the passwords stored in the
     * password history.
     *
     * @param password The password to check.
     * @return Whether the password matches any in the history.
     */
    public boolean checkPasswordHistory(String password) {
        String passwordHashString = new String(passwordToHash(password));
        String passwordHistory = getString(PASSWORD_HISTORY_KEY);
        if (passwordHistory == null) {
            return false;
        }
        // Password History may be too long...
        int passwordHashLength = passwordHashString.length();
        int passwordHistoryLength = getRequestedPasswordHistoryLength();
        if(passwordHistoryLength == 0) {
            return false;
        }
        int neededPasswordHistoryLength = passwordHashLength * passwordHistoryLength
                + passwordHistoryLength - 1;
        if (passwordHistory.length() > neededPasswordHistoryLength) {
            passwordHistory = passwordHistory.substring(0, neededPasswordHistoryLength);
        }
        return passwordHistory.contains(passwordHashString);
    }

    /**
     * Checks to see if the given file exists and contains any data. Returns
     * true if it does, false otherwise.
     *
     * @param filename
     * @return true if file exists and is non-empty.
     */
    private boolean nonEmptyFileExists(String filename) {
        try {
            // Check if we can read a byte from the file
            RandomAccessFile raf = new RandomAccessFile(filename, "r");
            raf.readByte();
            raf.close();
            return true;
        } catch (FileNotFoundException fnfe) {
            return false;
        } catch (IOException ioe) {
            return false;
        }
    }

    /**
=======
>>>>>>> 0b7b980761f3daa614ea725a5d432e8bd718eac6
     * Check to see if the user has stored a lock pattern.
     * @return Whether a saved pattern exists.
     */

    }

    /**
     * Check to see if a password matches any of the passwords stored in the
     * password history.
     *
     * @param password The password to check.
     * @return Whether the password matches any in the history.
     */
    public boolean checkPasswordHistory(String password) {
        String passwordHashString = new String(passwordToHash(password));
        String passwordHistory = getString(PASSWORD_HISTORY_KEY);
        if (passwordHistory == null) {
            return false;
        }
        // Password History may be too long...
        int passwordHashLength = passwordHashString.length();
        int passwordHistoryLength = getRequestedPasswordHistoryLength();
        if(passwordHistoryLength == 0) {
            return false;
        }
        int neededPasswordHistoryLength = passwordHashLength * passwordHistoryLength
                + passwordHistoryLength - 1;
        if (passwordHistory.length() > neededPasswordHistoryLength) {
            passwordHistory = passwordHistory.substring(0, neededPasswordHistoryLength);
        }
        return passwordHistory.contains(passwordHashString);
    }

    /**
     * Check to see if the user has stored a lock pattern.
     * @return Whether a saved pattern exists.
     */