package com.shanhy.tools.packers;                import java.security.Security;                import javax.crypto.Cipher;        import javax.crypto.SecretKey;        import javax.crypto.spec.SecretKeySpec;                /**        * 3DES加密        *         * @author SHANHY(365384722@QQ.COM)        * @date 2015-8-18        */        public class ThreeDES {                    private static final String Algorithm = "DESede"; // 定义 加密算法,可用                                                                // DES,DESede,Blowfish                    /**            * 加密方法            *             * @param keybyte            *            加密密钥，长度为24字节            * @param src            *            被加密的数据缓冲区（源）            * @return            * @author SHANHY            * @date 2015-8-18            */            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;            }                    /**            * 解密            *             * @param keybyte            *            加密密钥，长度为24字节            * @param src            *            加密后的缓冲区            * @return            * @author SHANHY            * @date 2015-8-18            */            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            *             * @param b            * @return            * @author SHANHY            * @date 2015-8-18            */            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();            }                    /**            * 测试            *             * @param args            * @author SHANHY            * @date 2015-8-18            */            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());                        // 24字节的密钥（我们可以取apk签名的指纹的前12个byte和后12个byte拼接在一起为我们的密钥）                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 };                String szSrc = "This is a 3DES test. 测试";                        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)));            }                }