AES加密，key, 支持解密-代码

秒速五厘米 2022-03-25 12:50 199阅读 0赞

传入一个私密的key, 一个需要加密的信息， 进行加密。

传入一个私密的key, 一个需要解密的秘闻信息，进行解密。

import java.security.Key;
    import java.security.SecureRandom;
    
    import javax.crypto.Cipher;
    import javax.crypto.KeyGenerator;
    
    import sun.misc.BASE64Decoder;
    import sun.misc.BASE64Encoder;
    
    /**
     * @author wangwei
     * @version v1.0.0
     * @description AES加密工具
     * @date 2019-01-14
     */
    public class SecurityUtil {
    
        // optional value AES/DES/DESede
        public static String DES = "AES";
        // optional value AES/DES/DESede
        public static String CIPHER_ALGORITHM = "AES";
    
        public static Key getKey(String strKey) {
            try {
                if (strKey == null) {
                    strKey = "";
                }
                KeyGenerator _generator = KeyGenerator.getInstance("AES");
                SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
                secureRandom.setSeed(strKey.getBytes());
                _generator.init(128, secureRandom);
                return _generator.generateKey();
            } catch (Exception e) {
                throw new RuntimeException(" 密钥出现异常 ");
            }
        }
    
        public static String encrypt(String data, String key) throws Exception {
            SecureRandom sr = new SecureRandom();
            Key secureKey = getKey(key);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, secureKey, sr);
            byte[] bt = cipher.doFinal(data.getBytes());
            String strS = new BASE64Encoder().encode(bt);
            return strS;
        }
    
    
        public static String decrypt(String message, String key) throws Exception {
            SecureRandom sr = new SecureRandom();
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            Key secureKey = getKey(key);
            cipher.init(Cipher.DECRYPT_MODE, secureKey, sr);
            byte[] res = new BASE64Decoder().decodeBuffer(message);
            res = cipher.doFinal(res);
            return new String(res);
        }
    
        public static void main(String[] args) throws Exception {
            String message = "123456";
            String key = "key_123456";
            String encryptMsg = encrypt(message, key);
            System.out.println("加密信息");
            System.out.println(encryptMsg);
    
            String decryptedMsg = decrypt(encryptMsg, key);
            System.out.println("解密信息");
            System.out.println(decryptedMsg);
        }
    
    }