AES 加密

秒速五厘米 2022-12-29 15:28 173阅读 0赞

import javax.crypto.Cipher;
    import javax.crypto.KeyGenerator;
    import javax.crypto.SecretKey;
    import javax.crypto.spec.SecretKeySpec;
    import java.security.NoSuchAlgorithmException;
    
    import org.apache.tomcat.util.codec.binary.Base64;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import java.security.SecureRandom;
    
    /**
     * @author :zoboy
     * @Description:
     * @ Date: Created in 2019-03-20 11:34
     */
    public class AESUtil {
        static Logger logger = LoggerFactory.getLogger(AESUtil.class);
        private static final String KEY_ALGORITHM = "AES";
        private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法
        private static final String ENCRYPT_KEY = "JXU0RTJEJXU4MjJBJXU4QkFGJXU3Njg0JXU3Q0JFJXU1NEMxJXU0RUE3JXU1NEMx";
    
        /**
         * AES 加密操作
         *
         * @param content  待加密内容
         * @param password 加密密码
         * @return 返回Base64转码后的加密数据
         */
        public static String encrypt(String content) {
            try {
                Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
    
                byte[] byteContent = content.getBytes("utf-8");
    
                cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(ENCRYPT_KEY));// 初始化为加密模式的密码器
    
                byte[] result = cipher.doFinal(byteContent);// 加密
    
                return Base64.encodeBase64String(result);//通过Base64转码返回
            } catch (Exception ex) {
                logger.error("加密错误", ex);
            }
    
            return null;
        }
    
        public static String encrypt(String content, SecretKeySpec secretKeySpec) {
            try {
                Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
    
                byte[] byteContent = content.getBytes("utf-8");
    
                cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);// 初始化为加密模式的密码器
    
                byte[] result = cipher.doFinal(byteContent);// 加密
    
                return Base64.encodeBase64String(result);//通过Base64转码返回
            } catch (Exception ex) {
                logger.error("加密错误", ex);
            }
    
            return null;
        }
    
        /**
         * AES 解密操作
         *
         * @param content
         * @param password
         * @return
         */
        public static String decrypt(String content, SecretKeySpec secretKeySpec) {
    
            try {
                //实例化
                Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
    
                //使用密钥初始化，设置为解密模式
                cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
    
                //执行操作
                byte[] result = cipher.doFinal(Base64.decodeBase64(content));
    
                return new String(result, "utf-8");
            } catch (Exception ex) {
                logger.error("解密错误", ex);
            }
    
            return null;
        }
    
        public static String decrypt(String content) {
    
            try {
                //实例化
                Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
    
                //使用密钥初始化，设置为解密模式
                cipher.init(Cipher.DECRYPT_MODE, getSecretKey(ENCRYPT_KEY));
    
                //执行操作
                byte[] result = cipher.doFinal(Base64.decodeBase64(content));
    
                return new String(result, "utf-8");
            } catch (Exception ex) {
                logger.error("解密错误", ex);
            }
    
            return null;
        }
    
        /**
         * 生成加密秘钥
         *
         * @return
         */
        private static SecretKeySpec getSecretKey(final String password) {
            //返回生成指定算法密钥生成器的 KeyGenerator 对象
            KeyGenerator kg = null;
            SecureRandom random = null;
            try {
                random = SecureRandom.getInstance("SHA1PRNG");
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
            random.setSeed(password.getBytes());
            try {
                kg = KeyGenerator.getInstance(KEY_ALGORITHM);
                //AES 要求密钥长度为 128
                kg.init(128, random);
                //生成一个密钥
                SecretKey secretKey = kg.generateKey();
                System.out.println("aes1  : " + java.util.Base64.getEncoder().encodeToString(secretKey.getEncoded()));
                SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为AES专用密钥
                String key = java.util.Base64.getEncoder().encodeToString(secretKeySpec.getEncoded());
                System.out.println("aes2  : " + key);
                return secretKeySpec;
            } catch (NoSuchAlgorithmException ex) {
                logger.error("生成加密秘钥错误", ex);
            }
    
            return null;
        }
    
    
        public static void main(String[] args) {
            String ss = "h2fJi/f9o6nEcbPxko9m61==";
            SecretKeySpec secretKeySpec =  getSecretKey(ss);
    //        byte[] keys = java.util.Base64.getDecoder().decode(ss);
    //        SecretKeySpec secretKeySpec = new SecretKeySpec(keys, KEY_ALGORITHM);// 转换为AES专用密钥
            String key = java.util.Base64.getEncoder().encodeToString(secretKeySpec.getEncoded());
            System.out.println("aes key : " + key);
            String encrypt = "zhonggsasda";
            String encryptStr = encrypt(encrypt, secretKeySpec);
            System.out.println("encryptStr : " + encryptStr);
            String decryptStr = decrypt(encryptStr, secretKeySpec);
            System.out.println("decryptStr : " + decryptStr);
        }
    
        public static String replaceidCard(String idCard) {
            if (idCard == null || "".equals(idCard)) return null;
            StringBuilder sb = new StringBuilder(idCard);
            sb.replace(6, 14, "********");
            return sb.toString();
        }
    
        public static String replacePhone(String phone) {
            if (phone == null || "".equals(phone)) return null;
            StringBuilder sb = new StringBuilder(phone);
            sb.replace(4, 8, "****");
            return sb.toString();
        }
    }