asp.net-mvc-4 – MVC4/DotNetOpenAuth中的自定义OAuth客户端 – 缺少访问令牌密钥

我目前正在为我的应用程序实现Dropbox OAuth客户端.直到我结束,这是一个相当轻松的过程.一旦我获得授权,当我尝试访问用户数据时,我从Dropbox返回401关于该令牌无效的消息.我在Dropbox论坛上问过,看起来我的请求缺少Dropbox返回的access_token_secret.我能够使用Fiddler来挖掘秘密,并将其添加到我的请求网址,它工作正常,所以这绝对是问题所在.那么为什么DotNetOpenAuth在返回访问令牌时不返回访问令牌秘密？

供参考,我的代码：

public class DropboxClient : OAuthClient
{
    public static readonly ServiceProviderDescription DropboxServiceDescription = new ServiceProviderDescription
    {
        RequestTokenEndpoint = new MessageReceivingEndpoint("https://api.dropbox.com/1/oauth/request_token",HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://www.dropbox.com/1/oauth/authorize",AccessTokenEndpoint = new MessageReceivingEndpoint("https://api.dropbox.com/1/oauth/access_token",TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new PlaintextSigningBindingElement() }
    };

    public DropboxClient(string consumerKey,string consumerSecret) : 
        this(consumerKey,consumerSecret,new AuthenticationOnlyCookieOAuthTokenManager())
    {
    }

    public DropboxClient(string consumerKey,string consumerSecret,IOAuthTokenManager tokenManager) : 
        base("dropbox",DropboxServiceDescription,new SimpleConsumerTokenManager(consumerKey,tokenManager))
    {
    }

    protected override DotNetOpenAuth.AspNet.AuthenticationResult VerifyAuthenticationCore(DotNetOpenAuth.OAuth.Messages.AuthorizedTokenResponse response)
    {            
        var profileEndpoint = new MessageReceivingEndpoint("https://api.dropbox.com/1/account/info",HttpDeliveryMethods.GetRequest);
        HttpWebRequest request = this.WebWorker.PrepareAuthorizedRequest(profileEndpoint,response.AccessToken);

        try
        {
            using (WebResponse profileResponse = request.GetResponse())
            {
                using (Stream profileResponseStream = profileResponse.GetResponseStream())
                {
                    using (StreamReader reader = new StreamReader(profileResponseStream))
                    {
                        string jsonText = reader.ReadToEnd();
                        JavaScriptSerializer jss = new JavaScriptSerializer();
                        dynamic jsonData = jss.DeserializeObject(jsonText);
                        Dictionary<string,string> extraData = new Dictionary<string,string>();
                        extraData.Add("displayName",jsonData.display_name ?? "Unknown");
                        extraData.Add("userId",jsonData.uid ?? "Unknown");
                        return new DotNetOpenAuth.AspNet.AuthenticationResult(true,ProviderName,extraData["userId"],extraData["displayName"],extraData);
                    }
                }
            }
        }
        catch (WebException ex)
        {
            using (Stream s = ex.Response.GetResponseStream())
            {
                using (StreamReader sr = new StreamReader(s))
                {
                    string body = sr.ReadToEnd();
                    return new DotNetOpenAuth.AspNet.AuthenticationResult(new Exception(body,ex));
                }
            }
        }
    }
}

解决方法

我还会在这里复制并粘贴完整帖子：

DotNetOpenAuth.AspNet 401未经授权的错误和持久访问令牌秘密修复

在设计我们的云电子书管理器QuietThyme时,我们知道每个人都讨厌像我们一样创建新帐户.我们开始寻找可以利用社交登录的OAuth和OpenId库.我们最终使用DotNetOpenAuth.AspNet库进行用户身份验证,因为它支持Microsoft,Twitter,Facebook,LinkedIn和Yahoo等许多其他人.虽然我们有一些问题需要设置,但最后我们只需要进行一些小的自定义来完成大部分工作(在previous coderwall post中描述).我们注意到,与其他所有人不同,LinkedIn客户端不会进行身份验证,从DotNetOpenAuth返回401 Unauthorized Error.很快就发现这是由于签名问题,在查看源代码后,我们能够确定检索到的AccessToken机密未与经过身份验证的配置文件信息请求一起使用.

它实际上是有道理的,OAuthClient类不包含检索的访问令牌秘密的原因是它通常不需要用于身份验证,这是ASP.NET OAuth库的主要目的.

我们需要在用户登录后对api进行身份验证请求,以检索一些标准配置文件信息,包括电子邮件地址和全名.我们能够通过暂时使用InMemoryOAuthTokenManager来解决这个问题.

public class LinkedInCustomClient : OAuthClient
{
    private static XDocument LoadXDocumentFromStream(Stream stream)
    {
        var settings = new XmlReaderSettings
        {
            MaxCharactersInDocument = 65536L
        };
        return XDocument.Load(XmlReader.Create(stream,settings));
    }

    /// Describes the OAuth service provider endpoints for LinkedIn.
    private static readonly ServiceProviderDescription LinkedInServiceDescription =
            new ServiceProviderDescription
            {
                AccessTokenEndpoint =
                        new MessageReceivingEndpoint("https://api.linkedin.com/uas/oauth/accessToken",HttpDeliveryMethods.PostRequest),RequestTokenEndpoint =
                        new MessageReceivingEndpoint("https://api.linkedin.com/uas/oauth/requestToken?scope=r_basicprofile+r_emailaddress",UserAuthorizationEndpoint =
                        new MessageReceivingEndpoint("https://www.linkedin.com/uas/oauth/authorize",TamperProtectionElements =
                        new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() },//ProtocolVersion = ProtocolVersion.V10a
            };

    private string ConsumerKey { get; set; }
    private string ConsumerSecret { get; set; }

    public LinkedInCustomClient(string consumerKey,string consumerSecret)
        : this(consumerKey,new AuthenticationOnlyCookieOAuthTokenManager()) { }

    public LinkedInCustomClient(string consumerKey,IOAuthTokenManager tokenManager)
        : base("linkedIn",LinkedInServiceDescription,tokenManager))
    {
        ConsumerKey = consumerKey;
        ConsumerSecret = consumerSecret;
    }

    //public LinkedInCustomClient(string consumerKey,string consumerSecret) :
    //    base("linkedIn",consumerKey,consumerSecret) { }

    /// Check if authentication succeeded after user is redirected back from the service provider.
    /// The response token returned from service provider authentication result. 
    [SuppressMessage("Microsoft.Design","CA1031:DoNotCatchGeneralExceptionTypes",Justification = "We don't care if the request fails.")]
    protected override AuthenticationResult VerifyAuthenticationCore(AuthorizedTokenResponse response)
    {
        // See here for Field Selectors API http://developer.linkedin.com/docs/DOC-1014
        const string profileRequestUrl =
            "https://api.linkedin.com/v1/people/~:(id,first-name,last-name,headline,industry,summary,email-address)";

        string accessToken = response.AccessToken;

        var profileEndpoint =
            new MessageReceivingEndpoint(profileRequestUrl,HttpDeliveryMethods.GetRequest);

        try
        {
            InMemoryOAuthTokenManager imoatm = new InMemoryOAuthTokenManager(ConsumerKey,ConsumerSecret);
            imoatm.ExpireRequestTokenAndStoreNewAccessToken(String.Empty,String.Empty,accessToken,(response as ITokenSecretContainingMessage).TokenSecret);
            WebConsumer w = new WebConsumer(LinkedInServiceDescription,imoatm);

            HttpWebRequest request = w.PrepareAuthorizedRequest(profileEndpoint,accessToken);

            using (WebResponse profileResponse = request.GetResponse())
            {
                using (Stream responseStream = profileResponse.GetResponseStream())
                {
                    XDocument document = LoadXDocumentFromStream(responseStream);
                    string userId = document.Root.Element("id").Value;

                    string firstName = document.Root.Element("first-name").Value;
                    string lastName = document.Root.Element("last-name").Value;
                    string userName = firstName + " " + lastName;

                    string email = String.Empty;
                    try
                    {
                        email = document.Root.Element("email-address").Value;
                    }
                    catch(Exception)
                    {
                    }

                    var extraData = new Dictionary<string,string>();
                    extraData.Add("accesstoken",accessToken);
                    extraData.Add("name",userName);
                    extraData.AddDataIfNotEmpty(document,"headline");
                    extraData.AddDataIfNotEmpty(document,"summary");
                    extraData.AddDataIfNotEmpty(document,"industry");

                    if(!String.IsNullOrEmpty(email))
                    {
                        extraData.Add("email",email);
                    }

                    return new AuthenticationResult(
                        isSuccessful: true,provider: this.ProviderName,providerUserId: userId,userName: userName,extraData: extraData);
                }
            }
        }
        catch (Exception exception)
        {
            return new AuthenticationResult(exception);
        }
    }
}

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