java接口加签验签方法

喜欢ヅ旅行 2023-02-11 04:36 93阅读 0赞

计算字符串ascii值

public   int  getStrAscii(String  s){
            int  asciiValue=0;
            if(StringUtils.isNotBlank(s)){
                int  len=s.length();
                char[] chars = s.toCharArray();
                for(char  ch: chars){
                    asciiValue=((int) ch)+asciiValue;
                }
            }
            return asciiValue;
      }

将参数封装到map中进行md5签名

/**
         * 参数签名
         * @param map
         * @return
         */
        public String  getSign(Map<String,Object> map){
            StringBuilder  sb=new StringBuilder();
            String  signKey="sign";
            Set<String> keyList = map.keySet();
            keyList.stream().sorted((s1, s2) -> getStrAscii(s1) - getStrAscii(s2)).forEach((t)->{
                 if(!signKey.equals(t)){
                     sb.append(t).append("=").append(map.get(t)).append("&");
                 }
            });
            String s = sb.toString();
            //加签内容
            String encryptedContent= s.substring(0, s.length() - 1);
            //密文
            return MD5Util.getMD5String(encryptedContent);
        }

参数验签

/**
         * 参数验签
         * @param map
         * @return
         */
        private  static   boolean  validSign(Map<String,Object> map){
            String signContent= (String) map.get("sign");
            //password双方约定好，不传输
            map.put("password",123456);
            String cipherText = getSign(map);
            System.out.println("cipherText-->"+cipherText+",signContent="+signContent);
            return StringUtils.equals(cipherText,signContent);
        }

md5方法

public class MD5Util
    {
      protected static char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
    
      protected static MessageDigest messagedigest = null;
    
      public static String getMD5String(String s)
      {
        return getMD5String(s.getBytes());
      }
    
      public static boolean checkPassword(String password, String md5PwdStr) {
        String s = getMD5String(password);
        return s.equals(md5PwdStr);
      }
    
      public static String getMD5String(byte[] bytes) {
        messagedigest.update(bytes);
        return bufferToHex(messagedigest.digest());
      }
    
      private static String bufferToHex(byte[] bytes) {
        return bufferToHex(bytes, 0, bytes.length);
      }
    
      private static String bufferToHex(byte[] bytes, int m, int n) {
        StringBuffer stringbuffer = new StringBuffer(2 * n);
        int k = m + n;
        for (int l = m; l < k; l++) {
          appendHexPair(bytes[l], stringbuffer);
        }
        return stringbuffer.toString();
      }
    
      private static void appendHexPair(byte bt, StringBuffer stringbuffer) {
        char c0 = hexDigits[((bt & 0xF0) >> 4)];
        char c1 = hexDigits[(bt & 0xF)];
        stringbuffer.append(c0);
        stringbuffer.append(c1);
      }
    
    }