发布:2023/11/5 13:42:07作者:管理员 来源:本站 浏览次数:464
var crypto=require("crypto");
var token={
createToken:function(obj,timeout){
console.log(parseInt(timeout)||0);
var obj2={
data:obj,//payload
created:parseInt(Date.now()/1000),//token生成的时间的,单位秒
exp:parseInt(timeout)||10//token有效期
};
//payload信息
var base64Str=Buffer.from(JSON.stringify(obj2),"utf8").toString("base64");
//添加签名,防篡改
var secret="hel.h-five.com";
var hash=crypto.createHmac('sha256',secret);
hash.update(base64Str);
var signature=hash.digest('base64');
return base64Str+"."+signature;
},
decodeToken:function(token){
var decArr=token.split(".");
if(decArr.length<2){
//token不合法
return false;
}
var payload={};
//将payload json字符串 解析为对象
try{
payload=JSON.parse(Buffer.from(decArr[0],"base64").toString("utf8"));
}catch(e){
return false;
}
//检验签名
var secret="hel.h-five.com";
var hash=crypto.createHmac('sha256',secret);
hash.update(decArr[0]);
var checkSignature=hash.digest('base64');
return {
payload:payload,
signature:decArr[1],
checkSignature:checkSignature
}
},
checkToken:function(token){
var resDecode=this.decodeToken(token);
if(!resDecode){
return false;
}
//是否过期
var expState=(parseInt(Date.now()/1000)-parseInt(resDecode.payload.created))>parseInt(resDecode.payload.exp)?false:true;
if(resDecode.signature===resDecode.checkSignature&&expState){
return true;
}
return false;
}
}
module.exports=exports=token;
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