Question

http://www.hanewin.net/encrypt/aes/aes-test.htm

如果您访问此网站并输入以下内容：

"Key In Hex":        00000000000000000000000000123456

"Plain Text in Hex": 00000000000000000000000000000000

然后点击“加密”按钮，你会看到十六进制的密文是：

3fa9f2a6e4c2b440fb6f676076a8ba04

是否有Java程序可以执行此操作（即是否有一个AES库，它将在上面输入“Hex In Hex”，上面的“Hex Text”，并在上面生成十六进制的密文？）？

我很感激任何有关这样做的Java示例代码的建议或链接。

Answer 1

请参阅下面的代码，了解使用JCE类执行此操作的标准方法。

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;

public class EncryptionExample {

  public static void main(String[] args) throws Exception {
    final String keyHex = "00000000000000000000000000123456";
    final String plaintextHex = "00000000000000000000000000000000";

    SecretKey key = new SecretKeySpec(DatatypeConverter
        .parseHexBinary(keyHex), "AES");

    Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, key);

    byte[] result = cipher.doFinal(DatatypeConverter
        .parseHexBinary(plaintextHex));

    System.out.println(DatatypeConverter.printHexBinary(result));
  }
}

打印：

3FA9F2A6E4C2B440FB6F676076A8BA04

Answer 2

而不是将字节转换为HEX，您也可以转换为Base64。我喜欢使用Apache Commons。这是一个例子。

要编译，您需要额外的Apache Commons Codec jar，可在此处获取：

http://commons.apache.org/proper/commons-codec/download_codec.cgi

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

public class Encryptor {
    public static String encrypt(String key1, String key2, String value) {
        try {
            IvParameterSpec iv = new IvParameterSpec(key2.getBytes("UTF-8"));

            SecretKeySpec skeySpec = new SecretKeySpec(key1.getBytes("UTF-8"),
                    "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
            byte[] encrypted = cipher.doFinal(value.getBytes());
            System.out.println("encrypted string:"
                    + Base64.encodeBase64String(encrypted));
            return Base64.encodeBase64String(encrypted);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return null;
    }

    public static String decrypt(String key1, String key2, String encrypted) {
        try {
            IvParameterSpec iv = new IvParameterSpec(key2.getBytes("UTF-8"));

            SecretKeySpec skeySpec = new SecretKeySpec(key1.getBytes("UTF-8"),
                    "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
            byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));

            return new String(original);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {

        String key1 = "Bar12345Bar12345"; // 128 bit key
        String key2 = "ThisIsASecretKet";
        System.out.println(decrypt(key1, key2,
                encrypt(key1, key2, "Hello World")));
    }
}

有没有像本网站那样进行AES加密的示例Java代码？

2 个答案: