Password

// 2012-09-12 johnpfeiffer
// TODO: password + salt

package net.kittyandbear.util;

import java.security.SecureRandom;

public class Password
{
    private String password = "";
    private static final String CLASSVERSION = "0.35";
    private static String symbols = "aAbBcCdDeEfFGHJKLMnNPrRStTVWXYy023456789";
    public static final int MINLENGTH = 1;
    public static final int MAXLENGTH = 99;

    public Password( int length )
    {
        if( length < MINLENGTH )
        {
            throw new IllegalArgumentException( "Length must be greater than " + MINLENGTH );
        }
        if( length > MAXLENGTH )
        {
            throw new IllegalArgumentException( "Length must be less than or equal to " + MAXLENGTH );
        }
        this.password = generateRandomString( length );
    }

    public static String getVersion()
    {
        return CLASSVERSION;
    }

    public String get()
    {
        return this.password;
    }

    public boolean isValid( String input )
    {
        boolean result = false;
        if( input != null && !input.isEmpty() && input.equals( this.password ) ) // injection protection for <html/javascript>?
        {
            result = true;
        }
        return result;
    }

    private static String generateRandomString( int length )
    {
        StringBuffer stringbuffer = new StringBuffer();
        SecureRandom random = new SecureRandom();
        char c = 0;
        for( int i = 0 ; i < length ; i++ )
        {
            int temp = random.nextInt( symbols.length() );
            if( temp < symbols.length() && temp >= 0 )
            {
                c = symbols.charAt( temp );
                stringbuffer.append( c );
            }
        }
        return stringbuffer.toString();
    }

} // end class