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import java.security.Key;
import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;
public class MainClass {
public static void main(String[] args) throws Exception {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
KeyGenerator generator = KeyGenerator.getInstance("AES", "BC");
generator.init(128);
Key keyToBeWrapped = generator.generateKey();
System.out.println("input : " + new String(keyToBeWrapped.getEncoded()));
// create a wrapper and do the wrapping
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding", "BC");
KeyGenerator keyGen = KeyGenerator.getInstance("AES", "BC");
keyGen.init(256);
Key wrapKey = keyGen.generateKey();
cipher.init(Cipher.ENCRYPT_MODE, wrapKey);
byte[] wrappedKey = cipher.doFinal(keyToBeWrapped.getEncoded());
System.out.println("wrapped : " + new String(wrappedKey));
// unwrap the wrapped key
cipher.init(Cipher.DECRYPT_MODE, wrapKey);
Key key = new SecretKeySpec(cipher.doFinal(wrappedKey), "AES");
System.out.println("unwrapped: " + new String(key.getEncoded()));
}
}
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WrapAndUnwrapKey.zip( 1,198 k)