Java进行3DES加密解密

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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;elsehs = 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)));}}
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