Key Generation in Java

From SkullSecurity
Revision as of 04:04, 27 February 2008 by Ron (talk | contribs) (New page: ==WardenRandom.java== <pre>package warden; import util.Buffer; import util.ByteFromIntArray; public class WardenRandom { int position = 0; byte []random_data; byte []randomSource1; b...)
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WardenRandom.java

package warden;

import util.Buffer;
import util.ByteFromIntArray;

public class WardenRandom
{
	int position = 0;
	byte []random_data;
	byte []randomSource1;
	byte []randomSource2;
	
	public WardenRandom(byte []seed)
	{
		int length1 = seed.length >>> 1;
		int length2 = seed.length - length1;
		
		byte []seed1 = new byte[length1];
		byte []seed2 = new byte[length2];
		
		int i;
		
		for(i = 0; i < length1; i++)
			seed1[i] = seed[i];
		
		for(i = 0; i < length2; i++)
			seed2[i] = seed[i + length1];

		random_data = new byte[0x14];
		
		randomSource1 = ByteFromIntArray.LITTLEENDIAN.getByteArray(WardenSHA1.hash(seed1));
		randomSource2 = ByteFromIntArray.LITTLEENDIAN.getByteArray(WardenSHA1.hash(seed2));

		this.update();

		position = 0;

	}

	private void update()
	{
		WardenSHA1 sha1 = new WardenSHA1();
		sha1.update(this.randomSource1);
		sha1.update(this.random_data);
		sha1.update(this.randomSource2);
		this.random_data = ByteFromIntArray.LITTLEENDIAN.getByteArray(sha1.digest());
	}


	byte getByte()
	{
		int i = this.position;
		byte value = this.random_data[i];

		i++;
		if(i >= 0x14)
		{
			i = 0;
			this.update();
		}
		this.position = i;

		return value;
	}

	byte []getBytes(int bytes)
	{
		int i;
		byte []buffer = new byte[bytes];

		for(i = 0; i < bytes; i++)
			buffer[i] = this.getByte();
		
		return buffer;
	}

	public static void main(String []args)
	{
		WardenRandom source = new WardenRandom(new byte[] { 0x11, 0x22, 0x33, 0x44, 0x55 });
		Buffer b = new Buffer(source.getBytes(0x100));
		System.out.println(b);
		System.out.println();
		
		System.out.println("Should be:");
		System.out.println("94 76 f0 7d b1 56 ea 1c fc c6 a6 92 a7 89 55 8e");
		System.out.println("2e 92 79 20 7d c8 56 b8 96 ed 7a f7 99 2d dc a2");
		System.out.println("1e 92 c2 c6 03 72 b1 a8 82 0a a5 c6 14 4d 71 8e");
		System.out.println("57 3b 72 0b 88 2e 49 e7 71 9d 74 c1 8d cf 8d ed");
		System.out.println("f7 15 e2 02 a1 2a 56 8a 5b a8 97 56 ee 4e 02 bf");
		System.out.println("53 41 81 c6 21 ea 50 5e 6e fa db 13 cb 94 5f a2");
		System.out.println("bf 8b 2e 52 8e 79 84 85 58 b0 a4 bc 85 ff e7 a6");
		System.out.println("db 04 9c a1 76 2b 92 10 21 5b 21 e1 11 d5 1c a3");
		System.out.println("c6 e4 77 d9 bc 76 93 6e 37 44 09 66 23 cc e8 47");
		System.out.println("75 f5 85 ca 68 3b 3a 50 08 f4 4b ef 89 a0 6a fe");
		System.out.println("da c5 0a 47 7a 45 56 61 c8 10 b0 4a a4 78 fc 3e");
		System.out.println("41 06 ad ea e3 f5 52 75 4b 6c ab 8f 30 93 97 49");
		System.out.println("c7 74 2f 94 8d 36 0c 7b 2a f2 66 24 a5 bf 8e 77");
		System.out.println("3c 05 bd e3 6d 8d ff b9 37 fe 00 ba f6 53 02 5d");
		System.out.println("d3 5d ae 6b 0a 70 b5 c1 88 12 42 1a 6d 33 0e 5f");
		System.out.println("82 33 26 32 54 a1 28 3f 2d ae ae 52 60 da 4e 65");
	}
}

util.ByteFromIntArray

/*

 * ByteFromIntArray.java

 *

 * Created on May 21, 2004, 11:39 AM

 */



package util;



/** This is a class to take care of treating an array of ints like a an array of bytes.

 * Note that this always works in Little Endian

 */

public class ByteFromIntArray

{

    private boolean littleEndian;

    

    public static final ByteFromIntArray LITTLEENDIAN = new ByteFromIntArray(true);

    public static final ByteFromIntArray BIGENDIAN = new ByteFromIntArray(false);



    /**

     * @param args the command line arguments

     */

    /*public static void main(String[] args)

    {

        int []test = { 0x01234567, 0x89abcdef };

        

        ByteFromIntArray bfia = new ByteFromIntArray(false);

        

        byte []newArray = bfia.getByteArray(test);

        

        for(int i = 0; i < newArray.length; i++)

            System.out.print(" " + PadString.padHex(newArray[i], 2));

    }*/

    

    public ByteFromIntArray(boolean littleEndian)

    {

        this.littleEndian = littleEndian;

    }



    public byte getByte(int[] array, int location)

    {

        if((location / 4) >= array.length)

            throw new ArrayIndexOutOfBoundsException("location = " + location + ", number of bytes = " + (array.length * 4));

        

        int theInt = location / 4; // rounded

        int theByte = location % 4; // remainder

        

        

        // reverse the byte to simulate little endian

        if(littleEndian)

            theByte = 3 - theByte;

        

        // I was worried about sign-extension here, but then I realized that they are being

        // put into a byte anyway so it wouldn't matter.

        if(theByte == 0)

            return (byte)((array[theInt] & 0x000000FF) >> 0);

        else if(theByte == 1)

            return (byte)((array[theInt] & 0x0000FF00) >> 8);

        else if(theByte == 2)

            return (byte)((array[theInt] & 0x00FF0000) >> 16);

        else if(theByte == 3)

            return (byte)((array[theInt] & 0xFF000000) >> 24);

        

        return 0;

    }

    

    

    /** This function is used to insert the byte into a specified spot in

     * an int array.  This is used to simulate pointers used in C++.

     * Note that this works in little endian only.

     * @param intBuffer The buffer to insert the int into.

     * @param b The byte we're inserting.

     * @param location The location (which byte) we're inserting it into.

     * @return The new array - this is returned for convenience only.

     */

    public int[] insertByte(int[] intBuffer, int location, byte b)

    {

        // Get the location in the array and in the int

        int theInt = location / 4;

        int theByte = location % 4;



        // If we're using little endian reverse the hex position

        if(littleEndian == false)

            theByte = 3 - theByte;

        

        int replaceInt = intBuffer[theInt];

        

        // Creating a new variable here because b is a byte and I need an int

        int newByte = b << (8 * theByte);



        if(theByte == 0)

            replaceInt &= 0xFFFFFF00;

        else if(theByte == 1)

            replaceInt &= 0xFFFF00FF;

        else if(theByte == 2)

            replaceInt &= 0xFF00FFFF;

        else if(theByte == 3)

            replaceInt &= 0x00FFFFFF;

        

        replaceInt = replaceInt | newByte;

        

        intBuffer[theInt] = replaceInt;

        

        return intBuffer;

        

    }



    

    public byte[] getByteArray(int[] array)

    {

        byte[] newArray = new byte[array.length * 4];

        

        int pos = 0;

        for(int i = 0; i < array.length; i++)

        {

            if(littleEndian)

            {

                newArray[pos++] = (byte)((array[i] >> 0) & 0xFF);

                newArray[pos++] = (byte)((array[i] >> 8) & 0xFF);

                newArray[pos++] = (byte)((array[i] >> 16) & 0xFF);

                newArray[pos++] = (byte)((array[i] >> 24) & 0xFF);

            }

            else

            {

                newArray[pos++] = (byte)((array[i] >> 24) & 0xFF);

                newArray[pos++] = (byte)((array[i] >> 16) & 0xFF);

                newArray[pos++] = (byte)((array[i] >> 8) & 0xFF);

                newArray[pos++] = (byte)((array[i] >> 0) & 0xFF);

            }

        }

        

        return newArray;

    }

    

    public byte[] getByteArray(int integer)

    {

        int[] temp = new int[1];

        temp[0] = integer;

        return getByteArray(temp);

    }

}