Java：從編碼密鑰獲取密鑰

Question

如何從編碼的byte []返回到java.security.Key？

import java.security.Key;
import javax.crypto.SecretKey;
import javax.crypto.KeyGenerator;

public class TestRSA {

    public static void main(String[] args) throws Exception {

    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128);
    SecretKey key = kgen.generateKey();
    byte[] encoded = key.getEncoded();

    // now, how to get back the Key object from the encoded byte[]?

    }
}

Answer 1

找到了！ http://www.exampledepot.com/egs/javax.crypto/GetKeyBytes.html

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