RC4 Algorithmus

[ProggerSchaf]

Huhu Leute ich hab ein Problem, mein RC4 funktioniert nicht so wie ich weill, es kommt was anderes als bei CrypTool raus obwohl laut Wiki mein Code richtig sein müsste:

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new Algorithmus();
	}

	short[] sbox = new short[256];
	short[] key = {0xac,0xfa, 0x0c,00,11,22,33,44};
	
	private void initalizeSandbox(){
		int i = 0;
		int j = 0;
		for(i = 0; i < 256; i++){
			sbox[i] = (short) (i);
		}		
		i = 0;
		
		for(i = 0; i < 256; i++){
			j = (j + sbox[i] + key[(i%8)]) % 256;
			short newSi = sbox[j];
			short newSj = sbox[i];
			sbox[i] = newSi;
			sbox[j] = newSj;
		}	
		
		for(i = 0; i < 256; i++){
			j = (j + sbox[i] + key[(i%8)]) % 256;
			short newSi = sbox[j];
			short newSj = sbox[i];
			sbox[i] = newSi;
			sbox[j] = newSj;
		}
	}	

	
	
	
	public static String arrayToHex(byte[] data, boolean setdelimeter) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
            String bs = Integer.toHexString(data[i] & 0xFF);
            if (bs.length() == 1) {
                sb.append(0);
            }
            sb.append(bs);
            if( setdelimeter){
            sb.append("-");
            }
        }
       return sb.toString();
    } 
	
	public Algorithmus(){
		initalizeSandbox();	
		encryptSequenz("Codierung");
	}

	private void encryptSequenz(String string) {
		int i = 0;
		int j = 0;
		String[] s = string.split("");
		
		for(int z = 1; z < s.length; z++){
			System.out.println((int)s[z].charAt(0));
		}
		
		StringBuffer sb = new StringBuffer();
		for(int laenge = 1;  laenge < s.length; laenge++){
			i = (i+1) % 256;
			j = (j + sbox[i]) % 256;
			short newj = sbox[i];
			short newi = sbox[j];
			sbox[i] = newi;
			sbox[j] = newj;
			short randomnumber = sbox[((sbox[i] + sbox[j]) % 256)];
			short chiffre = (short) (((short)((int) s[laenge].charAt(0)))^ randomnumber);
			int zeichen = ((int) chiffre);
			sb.append(zeichen + "-");
		}
		
		System.out.println(sb.toString());
	}

 

[Murray]

1. Code-Tags verwenden
2. Was kommt raus, was soll rauskommen?

 

[ProggerSchaf]

Code Tags sind verwendet^^

Java meint: 141-133-189-225-29-182-146-161-102 also das sind halt Dez werte

CrypTool meint: 56-DD-92-F1-1C-19-17-15-98

 

[ProggerSchaf]

HALT


ERROR FOUND ^^

Zu doof

siehe in der Deklaration des schlüssels
keine Hexdefinition für 00 bis 44

korrektur:

	short[] key = {0xac,0xfa, 0x0c,0x00,0x11,0x22,0x33,0x44};