Key generation using AES Symmetric key Algorithm

الكود مكتوب بلغه الجافا

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import javax.swing.*;

import java.security.SecureRandom;

import javax.crypto.Cipher;

import javax.crypto.KeyGenerator;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

import java.util.Random ;

class AESKeyGeneration {

byte[] skey = new byte[1000];

String skeyString;

static byte[] raw;

public AESKeyGeneration() {

generateSymmetricKey();

}

void generateSymmetricKey() {

try {

Random r = new Random();

int num = r.nextInt(10000);

String knum = String.valueOf(num);

byte[] knumb = knum.getBytes();

skey=getRawKey(knumb);

skeyString = new String(skey);

System.out.println("AES Symmetric key = "+skeyString);

}

catch(Exception e) {

System.out.println(e);

}

}

private static byte[] getRawKey(byte[] seed) throws Exception {

KeyGenerator kgen = KeyGenerator.getInstance("AES");

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

sr.setSeed(seed);

kgen.init(128, sr); // 192 and 256 bits may not be available

SecretKey skey = kgen.generateKey();

raw = skey.getEncoded();

return raw;

}

public byte[] getSessionKey() {

return raw;

}

public static void main(String args[]) {

AESKeyGeneration aeskey = new AESKeyGeneration();

}

}

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