java 3des 解密_Java 3DES加密解密（Commons.Codec Base64）-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42493313/article/details/114422849

本文介绍了一种基于3DES算法的加密与解密方法，包括十六进制字符串转换、3DES加密及3DES解密的具体实现过程。通过示例展示了如何使用该方法对特定字符串进行加密与解密。

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依赖包import org.apache.commons.codec.digest.DigestUtils; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Base64;

算法代码/** * 转换成十六进制字符串 * @param username * @return * * lee on 2017-08-09 10:54:19 */ public static byte[] hex(String key){ String f = DigestUtils.md5Hex(key); byte[] bkeys = new String(f).getBytes(); byte[] enk = new byte[24]; for (int i=0;i<24;i++){ enk[i] = bkeys[i]; } return enk; } /** * 3DES加密 * @param key 密钥，24位 * @param srcStr 将加密的字符串 * @return * * lee on 2017-08-09 10:51:44 */ public static String encode3Des(String key,String srcStr){ byte[] keybyte = hex(key); byte[] src = srcStr.getBytes(); try { //生成密钥 SecretKey deskey = new SecretKeySpec(keybyte, "DESede"); //加密 Cipher c1 = Cipher.getInstance("DESede"); c1.init(Cipher.ENCRYPT_MODE, deskey); String pwd = Base64.encodeBase64String(c1.doFinal(src)); // return c1.doFinal(src);//在单一方面的加密或解密 return pwd; } catch (java.security.NoSuchAlgorithmException e1) { // TODO: handle exception e1.printStackTrace(); }catch(javax.crypto.NoSuchPaddingException e2){ e2.printStackTrace(); }catch(java.lang.Exception e3){ e3.printStackTrace(); } return null; } /** * 3DES解密 * @param key 加密密钥，长度为24字节 * @param desStr 解密后的字符串 * @return * * lee on 2017-08-09 10:52:54 */ public static String decode3Des(String key, String desStr){ Base64 base64 = new Base64(); byte[] keybyte = hex(key); byte[] src = base64.decode(desStr); try { //生成密钥 SecretKey deskey = new SecretKeySpec(keybyte, "DESede"); //解密 Cipher c1 = Cipher.getInstance("DESede"); c1.init(Cipher.DECRYPT_MODE, deskey); String pwd = new String(c1.doFinal(src)); // return c1.doFinal(src); return pwd; } catch (java.security.NoSuchAlgorithmException e1) { // TODO: handle exception e1.printStackTrace(); }catch(javax.crypto.NoSuchPaddingException e2){ e2.printStackTrace(); }catch(java.lang.Exception e3){ e3.printStackTrace(); } return null; }

调用String key = "xUHdKxzVCbsgVIwTnc1jtpWn"; String idcard = "130682199606071234"; String encode = DemoApplication.encode3Des(key, idcard); System.out.println("原串：" + idcard); System.out.println("加密后的串：" + encode); System.out.println("解密后的串：" + DemoApplication.decode3Des(key, encode));

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