blog.Toby

  BlogJava :: 首页 :: 新随笔 :: 联系 :: 聚合  :: 管理 ::
  130 随笔 :: 2 文章 :: 150 评论 :: 0 Trackbacks

/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2006-2-16
 * Time: 14:33:57
 * To change this template use File | Settings | File Templates.
 */
/*
字符串 DESede(3DES) 加密
*/
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;

public class Test3Des {

    private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish

    //keybyte为加密密钥,长度为24字节
    //src为被加密的数据缓冲区(源)
    public static byte[] encryptMode(byte[] keybyte, byte[] src) {
       try {
            //生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

            //加密
            Cipher c1 = Cipher.getInstance(Algorithm);
            c1.init(Cipher.ENCRYPT_MODE, deskey);
            return c1.doFinal(src);
        } catch (java.security.NoSuchAlgorithmException e1) {
            e1.printStackTrace();
        } catch (javax.crypto.NoSuchPaddingException e2) {
            e2.printStackTrace();
        } catch (java.lang.Exception e3) {
            e3.printStackTrace();
        }
        return null;
    }

    //keybyte为加密密钥,长度为24字节
    //src为加密后的缓冲区
    public static byte[] decryptMode(byte[] keybyte, byte[] src) {
 try {
            //生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

            //解密
            Cipher c1 = Cipher.getInstance(Algorithm);
            c1.init(Cipher.DECRYPT_MODE, deskey);
            return c1.doFinal(src);
        } catch (java.security.NoSuchAlgorithmException e1) {
            e1.printStackTrace();
        } catch (javax.crypto.NoSuchPaddingException e2) {
            e2.printStackTrace();
        } catch (java.lang.Exception e3) {
            e3.printStackTrace();
        }
        return null;
    }

    //转换成十六进制字符串
    public static String byte2hex(byte[] b) {
        String hs="";
        String stmp="";

        for (int n=0;n<b.length;n++) {
            stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));
            if (stmp.length()==1) hs=hs+"0"+stmp;
            else hs=hs+stmp;
            if (n<b.length-1)  hs=hs+":";
        }
        return hs.toUpperCase();
    }

    public static void main(String[] args)
    {
        //添加新安全算法,如果用JCE就要把它添加进去
        Security.addProvider(new com.sun.crypto.provider.SunJCE());

        final byte[] keyBytes = {0x11, 0x22, 0x4F, 0x58, (byte)0x88, 0x10, 0x40, 0x38
                               , 0x28, 0x25, 0x79, 0x51, (byte)0xCB, (byte)0xDD, 0x55, 0x66
                               , 0x77, 0x29, 0x74, (byte)0x98, 0x30, 0x40, 0x36, (byte)0xE2}; //24字节的密钥
        String szSrc = "my name is Sidney.";

        System.out.println("加密前的字符串:" + szSrc);

        byte[] encoded = encryptMode(keyBytes, szSrc.getBytes());
        System.out.println("加密后的字符串:" + new String(encoded));

        byte[] srcBytes = decryptMode(keyBytes, encoded);
        System.out.println("解密后的字符串:" + (new String(srcBytes)));
    }
}

 

posted on 2006-02-16 14:45 渠上月 阅读(4996) 评论(1)  编辑  收藏 所属分类: java tips

评论

# re: Java中3DES加密解密调用示例(来自网络)[未登录] 2008-07-28 14:52 Tom
谢谢了,正需要用!  回复  更多评论
  


只有注册用户登录后才能发表评论。


网站导航: