js JavaScript RSA 加密

JS JavaScript RSA 加密

https://github.com/travist/jsencrypt

let publicKey = '<你的公钥 />';
let privateKey = '<你的私钥 />';

//使用 公钥 加密
const fnencrypt = (password) => {
  let encryptor = new JSEncrypt();  // JSEncrypt对象
  encryptor.setPublicKey(publicKey);  // 公钥
  let rsaPassWord = encryptor.encrypt(password);  // 密码进行加密
  return rsaPassWord;
};

// 使用 私钥 解密
 const fndecrypt = (password) => {
   let decryptor = new JSEncrypt();
   decryptor.setPrivateKey(privateKey);    // 私钥
   let rsaPassWord = decryptor.decrypt(password);
   return rsaPassWord;
 };

//超过117(加密)长度的原文内容分割成多个部分

// 在源码 自己 添加 
***

    JSEncrypt.prototype.encryptLong = function(string) {
      var k = this.getKey();
      try {
        var lt = "";
        var ct = "";
        //RSA每次加密117bytes，需要辅助方法判断字符串截取位置
        //1.获取字符串截取点
        var bytes = new Array();
        bytes.push(0);
        var byteNo = 0;
        var len,c;
        len = string.length;
        var temp = 0;
        for(var i = 0; i < len; i++){
          c = string.charCodeAt(i);
          if(c >= 0x010000 && c <= 0x10FFFF){
            byteNo += 4;
          }else if(c >= 0x000800 && c <= 0x00FFFF){
            byteNo += 3;
          }else if(c >= 0x000080 && c <= 0x0007FF){
            byteNo += 2;
          }else{
            byteNo += 1;
          }
          if((byteNo % 117) >= 114 || (byteNo % 117) == 0){
            if(byteNo-temp >= 114){
              bytes.push(i);
              temp = byteNo;
            }
          }
        }
        //2.截取字符串并分段加密
        if(bytes.length > 1){
          for(var i=0;i< bytes.length-1; i++){
            var str;
            if(i == 0){
              str = string.substring(0,bytes[i+1]+1);
            }else{
              str = string.substring(bytes[i]+1,bytes[i+1]+1);
            }
            var t1 = k.encrypt(str);
            ct += t1;
          };
          if(bytes[bytes.length-1] != string.length-1){
            var lastStr = string.substring(bytes[bytes.length-1]+1);
            ct += k.encrypt(lastStr);
          }
          return hex2b64(ct);
        }
        var t = k.encrypt(string);
        var y = hex2b64(t);
        return y;
      } catch (ex) {
        return false;
      }
    };

***
const fnencryptLone = (password) => {
  let encryptor = new JSEncrypt();  // JSEncrypt对象
  encryptor.setPublicKey(publicKey);  // 公钥
  let rsaPassWord = encryptor.encryptLong(password);  // 超长密码进行加密
  return rsaPassWord;
};