Java进行3DES加密解密详解编程语言

* @author SHANHY([email protected]) * @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))); }

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