Java 機密情報暗号化処理のサンプルコード共有

crypt | |--annotation | |--DecryptFiled | |--EncryptFiled |--crypt | |--EncryptDecryptInterface |--domain | |--BaseInfo | |--SimpleDomain |--utils | |--MySqlUtils

/** * Created by bright on 2017/2/22. * * @author : */ @Target(ElementType.FIELD) @Retention(RetentionPolicy.RUNTIME) public @interface EncryptFiled { String value() default ""; } 自定义注解

/** * Created by bright on 2017/2/22. * * @author : */ public interface EncryptDecryptInterface { public  T encryptSelf(); public  T decryptSelf(); } 自定义接口

/** * Created by bright on 2017/2/22. * * @author : */ @Component public class MySqlUtils { private static final String ENCRYPTTYPE= "AES";//加密方式 private static final String ENCODING = "UTF-8";//加密时编码 private static String MYSQLUTILSKEY = "aaa";//加密密盐 private static MySqlUtils mysqlUtils;//单例 private static Cipher encryptCipher ;//加密cipher private static Cipher decryptChipher;//解密chipher /** * 该方法可用在spring项目中使用配置文件设置密盐，默认值为123 * @param key */ @Value("${mysql.column.crypt.key:123}") public void setMysqlutilskey(String key){ MySqlUtils.MYSQLUTILSKEY = key; } /** * encryptCipher、decryptChipher初始化 */ public static void init(){ try { encryptCipher = Cipher.getInstance(ENCRYPTTYPE); decryptChipher = Cipher.getInstance(ENCRYPTTYPE); encryptCipher.init(Cipher.ENCRYPT_MODE, generateMySQLAESKey(MYSQLUTILSKEY, ENCODING)); decryptChipher.init(Cipher.DECRYPT_MODE, generateMySQLAESKey(MYSQLUTILSKEY, ENCODING)); } catch (InvalidKeyException e) { throw new RuntimeException(e); } catch (NoSuchAlgorithmException e) { throw new RuntimeException(e); } catch (NoSuchPaddingException e) { throw new RuntimeException(e); } } /** * 单例获取方法实现 * @return */ public synchronized static MySqlUtils getInstance(){ if(mysqlUtils == null){ mysqlUtils = new MySqlUtils(); init(); } return mysqlUtils; } /** * 加密算法 * @param encryptString * @return */ public String mysqlAESEncrypt(String encryptString) { try{ return new String(Hex.encodeHex(encryptCipher.doFinal(encryptString.getBytes(ENCODING)))).toUpperCase(); } catch (BadPaddingException e) { throw new RuntimeException(e); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } catch (IllegalBlockSizeException e) { throw new RuntimeException(e); } } /** * 解密算法 * @param decryptString * @return */ public String mysqlAESDecrypt(String decryptString){ try { return new String(decryptChipher.doFinal(Hex.decodeHex(decryptString.toCharArray()))); } catch (DecoderException nspe) { throw new RuntimeException(nspe); } catch (BadPaddingException nsae) { throw new RuntimeException(nsae); } catch (IllegalBlockSizeException ike) { throw new RuntimeException(ike); } } /** * 产生mysql-aes_encrypt * @param key 加密的密盐 * @param encoding 编码 * @return */ public static SecretKeySpec generateMySQLAESKey(final String key, final String encoding) { try { final byte[] finalKey = new byte[16]; int i = 0; for(byte b : key.getBytes(encoding)) finalKey[i++%16] ^= b; return new SecretKeySpec(finalKey, "AES"); } catch(UnsupportedEncodingException e) { throw new RuntimeException(e); } } } MysqlUtils

/** * Created by bright on 2017/2/22. * * @author : */ public class BaseInfo implements Cloneable, EncryptDecryptInterface { /** * 拷贝一个对象，并对新对象进行加密 * 该方法主要用在日志打印上，可防止原对象被加密而影响程序执行 * @param  * @return */ public  T cloneAndEncrypt() { T cloneT = null; try { cloneT = (T) this.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); return null; } if(cloneT !=null) return cloneT.encryptSelf(); throw new RuntimeException("拷贝对象异常"); } /** * 重写clone方法 * @return * @throws CloneNotSupportedException */ @Override protected Object clone() throws CloneNotSupportedException { try { return super.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); return null; } } /** * 实现自加密 * * @param  * @return */ public  T encryptSelf() { Field[] declaredFields = this.getClass().getDeclaredFields(); try { if (declaredFields != null && declaredFields.length > 0) { for (Field field : declaredFields) { if (field.isAnnotationPresent(EncryptFiled.class) && field.getType().toString().endsWith("String")) { field.setAccessible(true); String fieldValue = (String) field.get(this); if (StringUtils.isNotEmpty(fieldValue)) { field.set(this, MySqlUtils.getInstance().mysqlAESEncrypt(fieldValue)); } field.setAccessible(false); } } } } catch (IllegalAccessException e) { throw new RuntimeException(e); } return (T) this; } /** * 实现自解密 * * @param  * @return */ public  T decryptSelf() { Field[] declaredFields = this.getClass().getDeclaredFields(); try { if (declaredFields != null && declaredFields.length > 0) { for (Field field : declaredFields) { if (field.isAnnotationPresent(DecryptFiled.class) && field.getType().toString().endsWith("String")) { field.setAccessible(true); String fieldValue = (String)field.get(this); if(StringUtils.isNotEmpty(fieldValue)) { field.set(this, MySqlUtils.getInstance().mysqlAESDecrypt(fieldValue)); } } } } } catch (IllegalAccessException e) { throw new RuntimeException(e); } return (T) this; } } BaseInfo

/** * Created by bright on 2017/2/22. * * @author : */ public class SimpleDomain extends BaseInfo{ @EncryptFiled @DecryptFiled private String id; public String getId() { return id; } public void setId(String id) { this.id = id; } } SimpleDomain

public class Client { @Test public void test(){ SimpleDomain sd = new SimpleDomain();//要进行加密解密的实体类 sd.setId("6029131988005021537");//注入身份证号 System.out.println(JSON.toJSONString(sd.encryptSelf()));//执行自加密后输出 System.out.println(JSON.toJSONString(sd.decryptSelf()));//执行自解密后输出 } } Client