AES加密

偏执的太偏执、 2022-04-14 05:14 274阅读 0赞

AES加密是一种对称加密,即加密秘钥与解密秘钥相同

示例如下:

public class Aes {
        //算法
        private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
        
     
      
        /** 
         * 将byte[]转为各种进制的字符串 
         * @param bytes byte[] 
         * @param radix 可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制 
         * @return 转换后的字符串 
         */  
        public static String binary(byte[] bytes, int radix){  
            return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数  
        }  
      
        /** 
         * base 64 encode 
         * @param bytes 待编码的byte[] 
         * @return 编码后的base 64 code 
         */  
        public static String base64Encode(byte[] bytes){  
            return Base64.encodeBase64String(bytes);  
        }  
      
        /** 
         * base 64 decode 
         * @param base64Code 待解码的base 64 code 
         * @return 解码后的byte[] 
         * @throws Exception 
         */  
        public static byte[] base64Decode(String base64Code) throws Exception{  
            return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);  
        }  
      
          
        /** 
         * AES加密 
         * @param content 待加密的内容 
         * @param encryptKey 加密密钥 
         * @return 加密后的byte[] 
         * @throws Exception 
         */  
        public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {  
            KeyGenerator kgen = KeyGenerator.getInstance("AES");  
            kgen.init(128);  
            Cipher cipher = Cipher.getInstance(ALGORITHMSTR);  
            cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));  
      
            return cipher.doFinal(content.getBytes("utf-8"));  
        }  
      
      
        /** 
         * AES加密为base 64 code 
         * @param content 待加密的内容 
         * @param encryptKey 加密密钥 
         * @return 加密后的base 64 code 
         * @throws Exception 
         */  
        public static String aesEncrypt(String content, String encryptKey) throws Exception {  
            return base64Encode(aesEncryptToBytes(content, encryptKey));  
        }  
      
        /** 
         * AES解密 
         * @param encryptBytes 待解密的byte[] 
         * @param decryptKey 解密密钥 
         * @return 解密后的String 
         * @throws Exception 
         */  
        public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {  
            KeyGenerator kgen = KeyGenerator.getInstance("AES");  
            kgen.init(128);  
      
            Cipher cipher = Cipher.getInstance(ALGORITHMSTR);  
            cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));  
            byte[] decryptBytes = cipher.doFinal(encryptBytes);  
            return new String(decryptBytes);  
        }  
      
      
        /** 
         * 将base 64 code AES解密 
         * @param encryptStr 待解密的base 64 code 
         * @param decryptKey 解密密钥 
         * @return 解密后的string 
         * @throws Exception 
         */  
        public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {  
            return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);  
        } 
        
    }

实现后台加密解密

前端代码

传入相同的key值即可对原文和密文进行对应的加密与解密操作,密钥限制为64bits