/** * @Author: Helon * @Description: AES加密工具类 * @Data: Created in 2018/7/28 18:38 * @Modified By: */ public class AESSecretUtil { /**秘钥的大小*/ private static final int KEYSIZE = 128; /** * @Author: Helon * @Description: AES加密 * @param data - 待加密内容 * @param key - 加密秘钥 * @Data: 2018/7/28 18:42 * @Modified By: */ public static byte[] encrypt(String data, String key) { if(StringUtils.isNotBlank(data)){ try { KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); //选择一种固定算法，为了避免不同java实现的不同算法，生成不同的密钥，而导致解密失败 SecureRandom random = SecureRandom.getInstance("SHA1PRNG"); random.setSeed(key.getBytes()); keyGenerator.init(KEYSIZE, random); SecretKey secretKey = keyGenerator.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); SecretKeySpec secretKeySpec = new SecretKeySpec(enCodeFormat, "AES"); Cipher cipher = Cipher.getInstance("AES");// 创建密码器 byte[] byteContent = data.getBytes("utf-8"); cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);// 初始化 byte[] result = cipher.doFinal(byteContent); return result; // 加密 } catch (Exception e) { e.printStackTrace(); } } return null; } /** * @Author: Helon * @Description: AES加密，返回String * @param data - 待加密内容 * @param key - 加密秘钥 * @Data: 2018/7/28 18:59 * @Modified By: */ public static String encryptToStr(String data, String key){ return StringUtils.isNotBlank(data)?parseByte2HexStr(encrypt(data, key)):null; } /** * @Author: Helon * @Description: AES解密 * @param data - 待解密字节数组 * @param key - 秘钥 * @Data: 2018/7/28 19:01 * @Modified By: */ public static byte[] decrypt(byte[] data, String key) { if (ArrayUtils.isNotEmpty(data)) { try { KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); //选择一种固定算法，为了避免不同java实现的不同算法，生成不同的密钥，而导致解密失败 SecureRandom random = SecureRandom.getInstance("SHA1PRNG"); random.setSeed(key.getBytes()); keyGenerator.init(KEYSIZE, random); SecretKey secretKey = keyGenerator.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); SecretKeySpec secretKeySpec = new SecretKeySpec(enCodeFormat, "AES"); Cipher cipher = Cipher.getInstance("AES");// 创建密码器 cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);// 初始化 byte[] result = cipher.doFinal(data); return result; // 加密 } catch (Exception e) { e.printStackTrace(); } } return null; } /** * @Author: Helon * @Description: AES解密，返回String * @param enCryptdata - 待解密字节数组 * @param key - 秘钥 * @Data: 2018/7/28 19:01 * @Modified By: */ public static String decryptToStr(String enCryptdata, String key) { return StringUtils.isNotBlank(enCryptdata)?new String(decrypt(parseHexStr2Byte(enCryptdata), key)):null; } /** * @Author: Helon * @Description: 将二进制转换成16进制 * @param buf - 二进制数组 * @Data: 2018/7/28 19:12 * @Modified By: */ public static String parseByte2HexStr(byte buf[]) { StringBuffer sb = new StringBuffer(); for (int i = 0; i < buf.length; i++) { String hex = Integer.toHexString(buf[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } sb.append(hex.toUpperCase()); } return sb.toString(); } /** * @Author: Helon * @Description: 将16进制转换为二进制 * @param hexStr - 16进制字符串 * @Data: 2018/7/28 19:13 * @Modified By: */ public static byte[] parseHexStr2Byte(String hexStr) { if (hexStr.length() < 1) return null; byte[] result = new byte[hexStr.length()/2]; for (int i = 0;i< hexStr.length()/2; i++) { int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16); int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16); result[i] = (byte) (high * 16 + low); } return result; } public static void main(String[] args) { String ss = encryptToStr("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VySWQiOiIxMjMiLCJ1c2VyTmFtZSI6Ikp1ZHkiLCJleHAiOjE1MzI3Nzk2MjIsIm5iZiI6MTUzMjc3NzgyMn0.sIw_leDZwG0pJ8ty85Iecd_VXjObYutILNEwPUyeVSo", SecretConstant.DATAKEY); System.out.println(ss); System.out.println(decryptToStr(ss, SecretConstant.DATAKEY)); }
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