JAVA中使用AES加密解密

Posted 2020-09-27 大浪不惊涛

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    /**
     * AES加密测试
     *
     * @param str 加密参数
     */
    public void aesTest(String str) {
        log.info("[rsaTest获取请求:{}]", str);
        try {
            String encryptResult = AESUtil.encrypt(str, "123456");
            log.info("[AES加密后的参数为:{}]", encryptResult);
            String decryptResult = AESUtil.decrypt(encryptResult, "123456");
            log.info("[AES解密后的参数为:{}]", decryptResult);
        } catch (Exception e) {
            log.info("[AES加密解密出现异常:{}]", e);
        }
    }


    /**
     * AES加密
     *
     * @param content  需要加密的内容
     * @param password 加密密码
     * @return
     */
    public static String encrypt(String content, String password) {
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(password.getBytes()));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] result = cipher.doFinal(byteContent);
            Base64 base64 = new Base64();
            return base64.encodeToString(result);
        } catch (Exception e) {
            log.info("AES加密出现异常:{}", e);
        }
        return null;
    }

    /**
     * AES解密
     *
     * @param content  待解密内容
     * @param password 解密密钥
     * @return
     */
    public static String decrypt(String content, String password) {
        try {
            Base64 base64 = new Base64();
            byte[] text = base64.decode(content);
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(password.getBytes()));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] result = cipher.doFinal(text);
            return new String(result);
        } catch (Exception e) {
            log.info("AES解密出现异常:{}", e);
        }
        return null;
    }