以前好像看到sipo說asp寫openid有些不能解決的問題，我也沒查openid的規范。
這個對付簡單的登錄還是沒問題的，不過代碼還沒測試。

先放上來，有興趣的可以看看

 <script language="JScript" runat="server">
/*
ASP Openid
by fisker
2008-9-3
*/
var alert=PRint=write=function(str){Response.Write(str);}
var openid = new fiskerOpenid();
var input=getInput();
if(input["openid.mode"]=="id_res"){
  var nickname = input["openid.sreg.nickname"];
  var email = input["openid.sreg.email"];
  var returnUrl=input["return"];
  returnUrl += returnUrl.indexOf("?")!=-1?"&":"?";
  returnUrl += "nickname="+nickname;
  returnUrl += "&email="+email;

  Response.Redirect(returnUrl);
}else{
  if(input["openid"]==""||input["return"]==""){
    Response.write("<sc"+"ript>");
    Response.write("alert(/"error/");");
    Response.write("window.history.forward(1);");
    Response.write("</sc"+"ript>");
    Response.end();
  }
 
  openid.url = input["openid"];
  openid.get();
}

function getInput(){
    var input=new Array();
    var e=new Enumerator(Request.QueryString);
    for (;!e.atEnd();e.moveNext()){
      x=e.item();
      input[String(x).toLowerCase()]=String(Request.QueryString(x));
    }
    e=new Enumerator(Request.Form);
    for (;!e.atEnd();e.moveNext()){
      x=e.item();
      input[String(x).toLowerCase()]=String(Request.Form(x));
    }
    return input;
}

function fiskerOpenid(){
  this.url="";
  this.server="";
  this.delegate="";
  this.user = null;
  this.trust_root="";
  this.return_to="";
  this.sreg_required="nickname,email";

  this.get = function(info){
    if(!this.init()){Response.write("error");return;}
    if(info!=undefined)this.sreg_required=info;
    var html=this.request(this.server,"openid.mode=associate&openid.assoc_type=HMAC-SHA1");
    if (html==""){Response.write("error");return;}
    var assoc_handle = "";
    var assoc_type = "";
    var expires_in = "";
    var mac_key = "";
    try{
      var re=new RegExp("assoc_handle:(.+)","ig");
      assoc_handle = re.exec(html)[1];
      var re=new RegExp("assoc_type:(.+)","ig");
      aassoc_type = re.exec(html)[1];
      var re=new RegExp("expires_in:(.+)","ig");
      expires_in = re.exec(html)[1];
      var re=new RegExp("mac_key:(.+)","ig");
      mac_key = re.exec(html)[1];
      delete re;
    }catch(e){}

    var url = this.server;
    url += url.indexOf("?")!=-1?"&":"?";
    url += "openid.mode="+Server.URLEncode("checkid_setup");
    url += "&openid.identity="+Server.URLEncode(this.delegate);
    url += "&openid.trust_root="+Server.URLEncode(this.trust_root);
    url += "&openid.return_to="+Server.URLEncode(this.return_to);
    url += "&openid.assoc_handle="+Server.URLEncode(assoc_handle);
    url += "&openid.sreg.required="+Server.URLEncode(this.sreg_required);

    Response.Redirect(url);
  }

  this.init = function(){
    if(!this.check()) return false;

    if(this.trust_root==""||this.return_to==""){
      var thisServer="";
      var thisUrl="";
      thisServer+=String(Request.serverVariables("https")).toLowerCase()=="off"?"http://":"https://";
      thisServer+=String(Request.serverVariables("server_name"));
      thisServer+=String(Request.serverVariables("server_port"))=="80"?"":":"+String(Request.ServerVariables("server_port"));
      thisUrl+=thisServer;
      thisUrl+=String(Request.serverVariables("URL"));
      thisUrl+=String(Request.QueryString)==""?"":"?"+String(Request.QueryString);
      this.trust_root=(this.trust_root==""?thisServer:this.trust_root);
      this.return_to=(this.return_to==""?thisUrl:this.return_to);
    }

    var html = this.request(this.url);
    if (html=="") return false;
    html=html.replace(//'/ig,"/"");
    var re=new RegExp("<link(.*?)rel=/"(.*?)/"(.*?)href=/"(.*?)/"(.*?)>","ig");
    var arr=[];
    while ((arrMatch = re.exec(html)) != null){
      var index=arrMatch[2].toLowerCase();
      var value=arrMatch[4];
      if(index.indexOf(" ")){
        for(var j=0;j<index.split(" ").length;j++)arr[index.split(" ")[j]]=value;
      }else{
        arr[index]=value;
      }
    }
    delete re;
    if(arr["openid.server"]!=""){
      this.server=arr["openid.server"];
    }else{
      return false;
    }
    this.delegate = arr["openid.delegate"]==undefined?this.url:arr["openid.delegate"];
    return true;
  }

  this.check = function(){
    if (this.url=="") return false;
    if(this.url.indexOf("://")==-1) this.url="http://"+this.url;
    return true;
  }

  this.request = function(url,data){
    if (data == undefined)var data = null;
    var method = data ? 'POST' : 'GET';
    var html="";
    try{
      var xmlhttp=Server.CreateObject("MSXML2.Serverxmlhttp.3.0");
      xmlhttp.open(method,url,false);
      xmlhttp.send(data);
        html = this.bytesToStr(xmlhttp.responseBody);
      delete xmlhttp;
    }catch(e){}
      return html;
    }

  this.bytesToStr = function(CodeBody){
    var objStream= Server.CreateObject("ado"+"db.stream") ;
    objStream.Type = 1 ;
    objStream.Mode =3 ;
    objStream.Open() ;
    objStream.Write(CodeBody);
    objStream.Position = 0 ;
    objStream.Type = 2 ;
    objStream.charset = "utf-8" ;
    var returnstr = objStream.ReadText;
    objStream.Close();
    delete objStream;
    return returnstr;
  }

}
</script>

作者：fisker