Asp.net 加密和解密FormsAuthenticationTicket以验证用户身份

Asp.net 加密和解密FormsAuthenticationTicket以验证用户身份,asp.net,asp.net-mvc,asp.net-mvc-4,forms-authentication,httpmodule,Asp.net,Asp.net Mvc,Asp.net Mvc 4,Forms Authentication,Httpmodule,我正在尝试创建自己的身份验证机制,该机制依赖于FormsAuthentication。我基本上使用OAuth来允许用户在授权服务器中进行身份验证,一旦他们通过身份验证,我需要使用FormsAuthentication在整个会话中对他们进行身份验证。无论如何,我创建了一个HttpModule和一个helper类来实现这一点。不幸的是,事实并非如此 发生的情况是,在PostAuthenticateRequest上,我加密票据并向响应中添加cookie,然后将用户重定向到网站的根目录。重新定向用户后,

我正在尝试创建自己的身份验证机制,该机制依赖于
FormsAuthentication
。我基本上使用OAuth来允许用户在授权服务器中进行身份验证,一旦他们通过身份验证,我需要使用
FormsAuthentication
在整个会话中对他们进行身份验证。无论如何,我创建了一个
HttpModule
和一个helper类来实现这一点。不幸的是,事实并非如此

发生的情况是,在
PostAuthenticateRequest
上,我加密票据并向响应中添加cookie,然后将用户重定向到网站的根目录。重新定向用户后,将发出另一个HTTP请求,以便再次触发
HttpModule
,在
AuthenticateRequest
事件中,我将检查此用户是否经过身份验证。为了检查用户是否经过身份验证,我尝试读取cookie,从中获取用户名,然后设置
Thread.CurrentPrincipal
属性。但是,由于某些原因,无法找到cookie

这是我的密码:

public class OAuthModule : IHttpModule
{
    private const String USERNAME = "username";

    public void Dispose()
    {
    }

    public void Init(HttpApplication context)
    {
        context.AuthenticateRequest += context_AuthenticateRequest;
        context.PostAuthenticateRequest += context_PostAuthenticateRequest;
    }

    void context_PostAuthenticateRequest(object sender, EventArgs e)
    {
        var application = sender as HttpApplication;
        if (application != null)
        {
            String username = application.Context.Items[USERNAME].ToString();
            String uri = RemoveQueryStringFromUri(application.Context.Request.Url.AbsoluteUri);
            var cookie = IdentityHelper.GetEncryptedFormsAuthenticationCookie(username, uri);
            application.Context.Response.Cookies.Add(cookie);

            application.Context.Response.Redirect(uri);
        }
    }

    void context_AuthenticateRequest(object sender, EventArgs e)
    {
        HttpApplication application = sender as HttpApplication;
        if (sender != null)
        {
            if (!application.Context.Request.Url.AbsolutePath.Contains("."))
            {
                if (!IdentityHelper.IsAuthenticated)
                {
                    HttpContextWrapper wrapper = new HttpContextWrapper(application.Context);
                    String clientId = WebConfigurationManager.AppSettings["ClientId"];
                    String clientSecret = WebConfigurationManager.AppSettings["ClientSecret"];
                    String authorizationServerAddress = WebConfigurationManager.AppSettings["AuthorizationServerAddress"];
                    var client = OAuthClientFactory.CreateWebServerClient(clientId, clientSecret, authorizationServerAddress);
                    if (String.IsNullOrEmpty(application.Context.Request.QueryString["code"]))
                    {
                        InitAuthentication(wrapper, client);
                    }
                    else
                    {
                        OnAuthCallback(wrapper, client);
                    }
                }
            }
        }
    }


    private void InitAuthentication(HttpContextWrapper context, WebServerClient client)
    {
        var state = new AuthorizationState();
        var uri = context.Request.Url.AbsoluteUri;
        uri = RemoveQueryStringFromUri(uri);
        state.Callback = new Uri(uri);
        var address = "https://localhost";
        state.Scope.Add(address);

        OutgoingWebResponse outgoingWebResponse =  client.PrepareRequestUserAuthorization(state);
        outgoingWebResponse.Respond(context);
    }

    private void OnAuthCallback(HttpContextWrapper context, WebServerClient client)
    {
        try
        {
            IAuthorizationState authorizationState = client.ProcessUserAuthorization(context.Request);
            AccessToken accessToken = AccessTokenSerializer.Deserialize(authorizationState.AccessToken);
            String username = accessToken.User;
            context.Items[USERNAME] = username;                
        }
        catch (ProtocolException e)
        {
            EventLog.WriteEntry("OAuth Client", e.InnerException.Message);
        }
    }

    private String RemoveQueryStringFromUri(String uri)
    {
        int index = uri.IndexOf('?');
        if (index > -1)
        {
            uri = uri.Substring(0, index);
        }
        return uri;
    }
}


public class IdentityHelper
{
    public static Boolean IsAuthenticated
    {
        get
        {
            String username = DecryptFormsAuthenticationCookie();
            if (!String.IsNullOrEmpty(username))
            {
                SetIdentity(username);
                return Thread.CurrentPrincipal.Identity.IsAuthenticated;
            }
            return false;
        }
    }

    private static String DecryptFormsAuthenticationCookie() 
    {
        var cookie = HttpContext.Current.Request.Cookies[FormsAuthentication.FormsCookieName];
        if (cookie != null)
        {
            FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(cookie.Value);
            return ticket.UserData;
        }
        return String.Empty;
    }

    internal static HttpCookie GetEncryptedFormsAuthenticationCookie(String username, String domain)
    {
        var expires = DateTime.Now.AddMinutes(30);
        FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, username, DateTime.Now, expires, true, username, FormsAuthentication.FormsCookiePath);
        var cookie = new HttpCookie(FormsAuthentication.FormsCookieName);
        cookie.Value = FormsAuthentication.Encrypt(ticket);
        cookie.Domain = domain;
        cookie.Expires = expires;
        return cookie;
    }

    private static void SetIdentity(String username)
    {
        ClaimsIdentity claimsIdentity = new ClaimsIdentity(new List<Claim> { new Claim(ClaimTypes.Name, username) });
        var principal = new ClaimsPrincipal(claimsIdentity);
        Thread.CurrentPrincipal = principal;
    }
}
公共类OAuthModule:IHttpModule
{
私有常量字符串USERNAME=“USERNAME”;
公共空间处置()
{
}
公共void Init(HttpApplication上下文)
{
context.AuthenticateRequest+=context\u AuthenticateRequest;
context.PostAuthenticateRequest+=context\u PostAuthenticateRequest;
}
void context\u PostAuthenticateRequest(对象发送方,事件参数e)
{
var应用程序=发送方作为HttpApplication;
if(应用程序!=null)
{
字符串username=application.Context.Items[username].ToString();
字符串uri=RemoveQueryStringFromUri(application.Context.Request.Url.AbsoluteUri);
var cookie=IdentityHelper.GetEncryptedFormsAuthenticationCookie(用户名,uri);
application.Context.Response.Cookies.Add(cookie);
application.Context.Response.Redirect(uri);
}
}
void context_AuthenticateRequest(对象发送方,事件参数e)
{
HttpApplication application=发送方作为HttpApplication;
if(发送方!=null)
{
如果(!application.Context.Request.Url.AbsolutePath.Contains(“.”)包含
{
如果(!IdentityHelper.IsAuthenticated)
{
HttpContextWrapper=新的HttpContextWrapper(application.Context);
字符串clientId=WebConfigurationManager.AppSettings[“clientId”];
字符串clientSecret=WebConfiguration Manager.AppSettings[“clientSecret”];
String authorizationServerAddress=WebConfiguration Manager.AppSettings[“authorizationServerAddress”];
var client=OAuthClientFactory.CreateWebServerClient(clientId、clientSecret、authorizationServerAddress);
if(String.IsNullOrEmpty(application.Context.Request.QueryString[“code”]))
{
初始化身份验证(包装器、客户端);
}
其他的
{
OnAuthCallback(包装器、客户端);
}
}
}
}
}
私有void InitAuthentication(HttpContextWrapper上下文,WebServerClient客户端)
{
var state=新授权状态();
var uri=context.Request.Url.AbsoluteUri;
uri=RemoveQueryStringFromUri(uri);
state.Callback=新Uri(Uri);
变量地址=”https://localhost";
state.Scope.Add(地址);
OutgoingWebResponse OutgoingWebResponse=client.PrepareRequestUserAuthorization(状态);
outgoingWebResponse.Response(上下文);
}
AuthCallback上的私有void(HttpContextWrapper上下文,WebServerClient)
{
尝试
{
IAAuthorizationState authorizationState=client.ProcessUserAuthorization(context.Request);
AccessToken AccessToken=AccessTokenSerializer.Deserialize(authorizationState.AccessToken);
字符串username=accessToken.User;
context.Items[USERNAME]=用户名;
}
捕获(协议例外e)
{
WriteEntry(“OAuth客户端”,e.InnerException.Message);
}
}
私有字符串RemoveQueryStringFromUri(字符串uri)
{
int index=uri.IndexOf('?');
如果(索引>-1)
{
uri=uri.Substring(0,索引);
}
返回uri;
}
}
公共类标识帮助器
{
已验证公共静态布尔值
{
得到
{
字符串用户名=DecryptFormsAuthenticationCookie();
如果(!String.IsNullOrEmpty(用户名))
{
SetIdentity(用户名);
返回Thread.CurrentPrincipal.Identity.IsAuthenticated;
}
返回false;
}
}
私有静态字符串解密FormsAuthenticationCookie()
{
var cookie=HttpContext.Current.Request.Cookies[FormsAuthentication.FormScookeName];
if(cookie!=null)
{
FormsAuthenticationTicket票证=FormsAuthentication.Decrypt(cookie.Value);
返回票证.UserData;
}
返回字符串。空;
}
内部静态HttpCookie GetEncryptedFormsAuthenticationCookie(字符串用户名,字符串域)
{
var expires=DateTime.Now.AddMinutes(30);
FormsAuthenticationTicket票证=新的FormsAuthenticationTicket(1,用户名,日期时间。现在,过期,true,用户名,FormsAuthentication.FormsScookePath);
var cookie=新的HttpCookie(FormsAuthentication.formscookeName);
cookie.Value=FormsAuthentication.Encrypt(票据);
cookie.Domain=域;
cookie.Expires=过期;
返回cookie;
}
私有静态void SetIdentity(字符串用户名)
{
ClaimsIdentity ClaimsIdentity=新索赔
application.Context.Response.Redirect(uri, false);