- /*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)));
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/2003201511932.html
来源: http://www.codesnippet.cn/detail/2003201511932.html