Asp.Net MVC 4 Web API 中的安全认证-使用OAuth

各种语言实现的oauth认证： http://oauth.net/code/

 

上一篇文章介绍了如何使用基本的http认证来实现asp.net web api的跨平台安全认证。 这里说明一个如何使用oauth实现的认证。oauth大家可能不陌生。那么这里需要注意的是我们使用的是.net平台一个比较好的开源oauth库。 DOTNETOPENAUTH。

就像上图所示，我们需要一个ISSSUE Server来给我们一个token，然后再去资源服务器请求资源，也就是Web API Server。

 

首先在oAuthIssuer服务端我们需要实现一个DotNetOpenAuth的接口:IAuthorizationServer

 

对接口的实现:

 

public class OAuth2Issuer : IAuthorizationServer

    {

        private readonly IssuerConfiguration _configuration;



        public OAuth2Issuer(IssuerConfiguration configuration)

        {

            if (configuration == null) throw new ArgumentNullException("configuration");

            _configuration = configuration;

        }



        public RSACryptoServiceProvider AccessTokenSigningKey

        {

            get

            {

                return (RSACryptoServiceProvider)_configuration.SigningCertificate.PrivateKey;

            }

        }



        public DotNetOpenAuth.Messaging.Bindings.ICryptoKeyStore CryptoKeyStore

        {

            get { throw new NotImplementedException(); }

        }



        public TimeSpan GetAccessTokenLifetime(DotNetOpenAuth.OAuth2.Messages.IAccessTokenRequest accessTokenRequestMessage)

        {

            return _configuration.TokenLifetime;

        }



        public IClientDescription GetClient(string clientIdentifier)

        {

            const string secretPassword = "test1243";

            return new ClientDescription(secretPassword, new Uri("http://localhost/"), ClientType.Confidential);

        }



        public RSACryptoServiceProvider GetResourceServerEncryptionKey(DotNetOpenAuth.OAuth2.Messages.IAccessTokenRequest accessTokenRequestMessage)

        {

            return (RSACryptoServiceProvider)_configuration.EncryptionCertificate.PublicKey.Key;



        }



        public bool IsAuthorizationValid(DotNetOpenAuth.OAuth2.ChannelElements.IAuthorizationDescription authorization)

        {

            

            //claims added to the token

            authorization.Scope.Add("adminstrator");

            authorization.Scope.Add("poweruser");

            

            return true;

        }



        public bool IsResourceOwnerCredentialValid(string userName, string password)

        {

            return true;

        }



        public DotNetOpenAuth.Messaging.Bindings.INonceStore VerificationCodeNonceStore

        {

            get

            {

                throw new NotImplementedException();

            }

        }

    }

 

 

 

 

在 Web API Server端，我们需要使用Http Message Handler来获取httprequest信息；并进行是否有授权认证。

 

 public class OAuth2Handler : DelegatingHandler

    {

        private readonly ResourceServerConfiguration _configuration;



        public OAuth2Handler(ResourceServerConfiguration configuration)

        {

            if (configuration == null) throw new ArgumentNullException("configuration");

            _configuration = configuration;

        }



        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

        {

            HttpContextBase httpContext;

            string userName;

            HashSet<string> scope;



            if (!request.TryGetHttpContext(out httpContext))

                throw new InvalidOperationException("HttpContext must not be null.");



            var resourceServer = new ResourceServer(new StandardAccessTokenAnalyzer(

                                                        (RSACryptoServiceProvider)_configuration.IssuerSigningCertificate.PublicKey.Key,

                                                        (RSACryptoServiceProvider)_configuration.EncryptionVerificationCertificate.PrivateKey));



            var error = resourceServer.VerifyAccess(httpContext.Request, out userName, out scope);



            if (error != null)

                return Task<HttpResponseMessage>.Factory.StartNew(error.ToHttpResponseMessage);

            

            var identity = new ClaimsIdentity(scope.Select(s => new Claim(s, s)));

            if (!string.IsNullOrEmpty(userName))

                identity.Claims.Add(new Claim(ClaimTypes.Name, userName));

            

            httpContext.User = ClaimsPrincipal.CreateFromIdentity(identity);

            Thread.CurrentPrincipal = httpContext.User;



            return base.SendAsync(request, cancellationToken);

        }



    }

 

 

 

 

这里的ResourceServerConfiguration 我们是使用加密证书的。

 

客户端调用代码：

 

调用API获取数据之前需要从IssueServer获取Token。

GetAccessToken:

 

 

 

看一下Token信息：

{"access_token":"gAAAAIoUBVBrZ5jAxe5XeTgnJ8mGwwKsCReknueg4gLGlDQ77lR1yPfxt0yNfWLCBT7hxnHjRjuEwDTJ3J1YAnqML4MIgQg8A2cz2bs0EnxvCMfKnayKEesRM-lxLTFbWMpSxe2Xvjm61IbaXjrMkYDRMnV4Do8-7132tiOLIv02WOGlJAEAAIAAAACJ8F3SsE6cTI1XsioW_xOxHeESDzG16y01Gxm3HikYFUC3XIdekpPw0yMB4tavPmUj-kRyC1halbUX7JKf-Dihm6Ou5mexe9lcYTr9or_kH7WcDN5ZCryUK3OaecvwwjQVr5o9XD2ZyZSNDCNhVRFc5ypvP85zZCBW1KJkP3OTCV4AkMN-ROvgI8jxutYdsLLN-YbB7Ot5iypzWWbW0QxiwOzMEqG9nVtPwnIWOUMOvW5KbiELELhgjap60mwHzGrHG4TtA4jrNy8S9zjixO_q-FrgpAuC06CkSH-R4w9yPCLLDc9m3UoAnknFjd4PUbWLxCvlBpEK2sg03ENa0EOKzc2O5fEic9P-BiYt6afMwTgLkJlGBBjmCBpGZMkfLTw","token_type":"bearer","expires_in":"300","scope":"http:\/\/localhost\/ adminstrator poweruser"}

 

客户端调用：

 

 

 代码：

 

 

http://pan.baidu.com/s/1ntkMbCt