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字符串desede 3des加密示例分享

运维开发网 https://www.qedev.com 2020-03-09 13:59 出处:网络 作者: 网络整理
复制代码 代码如下:/*字符串 DESede(3DES) 加密*/import java.security.Security;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;import sun.misc.BASE64Decode

复制代码 代码如下:

/*字符串 DESede(3DES) 加密*/

import java.security.Security;

import javax.crypto.Cipher;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

public class DES3 {

 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 String 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);

   // 开始加密运算

   byte[] encryptedByteArray = c1.doFinal(src);

   // 加密运算之后 将byte[]转化为base64的String

   BASE64Encoder enc = new BASE64Encoder();

   return enc.encode(encryptedByteArray);

  }

  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, String 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);

   // 解密运算之前

   BASE64Decoder dec = new BASE64Decoder();

   byte[] encryptedByteArray = dec.decodeBuffer(src);

   // 解密运算 将base64的String转化为byte[]

   return c1.doFinal(encryptedByteArray);

  } 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 = "This is a 3DES test. 测试";

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

  String encoded = encryptMode(keyBytes, szSrc.getBytes());

  System.out.println("加密后的字符串:" + encoded);

  byte[] srcBytes = decryptMode(keyBytes, encoded);

  System.out.println("解密后的字符串:" + (new String(srcBytes)));

 }

}

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