[转载]Asp.Net MVC 4 Web API 中的安全认证-使用OAuth

[转载]Asp.Net MVC 4 Web API 中的安全认证-使用OAuth – Nic Pei – 博客园.

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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。

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

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对接口的实现:

<span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">OAuth2Issuer</span><span class="pun">:</span><span class="pln"> </span><span class="typ">IAuthorizationServer</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">private</span><span class="pln"> </span><span class="kwd">readonly</span><span class="pln"> </span><span class="typ">IssuerConfiguration</span><span class="pln"> _configuration</span><span class="pun">;</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="typ">OAuth2Issuer</span><span class="pun">(</span><span class="typ">IssuerConfiguration</span><span class="pln"> configuration</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">configuration </span><span class="pun">==</span><span class="pln"> </span><span class="kwd">null</span><span class="pun">)</span><span class="pln"> </span><span class="kwd">throw</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ArgumentNullException</span><span class="pun">(</span><span class="str">"configuration"</span><span class="pun">);</span><span class="pln">
        _configuration </span><span class="pun">=</span><span class="pln"> configuration</span><span class="pun">;</span><span class="pln">
    </span><span class="pun">}</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="typ">RSACryptoServiceProvider</span><span class="pln"> </span><span class="typ">AccessTokenSigningKey</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        </span><span class="kwd">get</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
            </span><span class="kwd">return</span><span class="pln"> </span><span class="pun">(</span><span class="typ">RSACryptoServiceProvider</span><span class="pun">)</span><span class="pln"> _configuration</span><span class="pun">.</span><span class="typ">SigningCertificate</span><span class="pun">.</span><span class="typ">PrivateKey</span><span class="pun">;</span><span class="pln">
        </span><span class="pun">}</span><span class="pln">
    </span><span class="pun">}</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="typ">DotNetOpenAuth</span><span class="pun">.</span><span class="typ">Messaging</span><span class="pun">.</span><span class="typ">Bindings</span><span class="pun">.</span><span class="typ">ICryptoKeyStore</span><span class="pln"> </span><span class="typ">CryptoKeyStore</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        </span><span class="kwd">get</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
            </span><span class="kwd">throw</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">NotImplementedException</span><span class="pun">();</span><span class="pln">
        </span><span class="pun">}</span><span class="pln">
    </span><span class="pun">}</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="typ">TimeSpan</span><span class="pln"> </span><span class="typ">GetAccessTokenLifetime</span><span class="pun">(</span><span class="typ">DotNetOpenAuth</span><span class="pun">.</span><span class="typ">OAuth2</span><span class="pun">.</span><span class="typ">Messages</span><span class="pun">.</span><span class="typ">IAccessTokenRequest</span><span class="pln"> accessTokenRequestMessage</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        </span><span class="kwd">return</span><span class="pln"> _configuration</span><span class="pun">.</span><span class="typ">TokenLifetime</span><span class="pun">;</span><span class="pln">
    </span><span class="pun">}</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="typ">IClientDescription</span><span class="pln"> </span><span class="typ">GetClient</span><span class="pun">(</span><span class="kwd">string</span><span class="pln"> clientIdentifier</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        </span><span class="kwd">const</span><span class="pln"> </span><span class="kwd">string</span><span class="pln"> secretPassword </span><span class="pun">=</span><span class="pln"> </span><span class="str">"test1243"</span><span class="pun">;</span><span class="pln">
        </span><span class="kwd">return</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ClientDescription</span><span class="pun">(</span><span class="pln">secretPassword</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Uri</span><span class="pun">(</span><span class="str">"http://localhost/"</span><span class="pun">),</span><span class="pln"> </span><span class="typ">ClientType</span><span class="pun">.</span><span class="typ">Confidential</span><span class="pun">);</span><span class="pln">
    </span><span class="pun">}</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="typ">RSACryptoServiceProvider</span><span class="pln"> </span><span class="typ">GetResourceServerEncryptionKey</span><span class="pun">(</span><span class="typ">DotNetOpenAuth</span><span class="pun">.</span><span class="typ">OAuth2</span><span class="pun">.</span><span class="typ">Messages</span><span class="pun">.</span><span class="typ">IAccessTokenRequest</span><span class="pln"> accessTokenRequestMessage</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
        </span><span class="kwd">return</span><span class="pln"> </span><span class="pun">(</span><span class="typ">RSACryptoServiceProvider</span><span class="pun">)</span><span class="pln"> _configuration</span><span class="pun">.</span><span class="typ">EncryptionCertificate</span><span class="pun">.</span><span class="typ">PublicKey</span><span class="pun">.</span><span class="typ">Key</span><span class="pun">;</span><span class="pln">
    </span><span class="pun">}</span><span class="pln">
    </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">bool</span><span class="pln"> </span><span class="typ">IsAuthorizationValid</span><span class="pun">(</span><span class="typ">DotNetOpenAuth</span><span class="pun">.</span><span class="typ">OAuth2</span><span class="pun">.</span><span class="typ">ChannelElements</span><span class="pun">.</span><span class="typ">IAuthorizationDescription</span><span class="pln"> authorization</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="com">//claims added to the token authorization.Scope.Add("adminstrator"); </span><span class="pln">
authorization</span><span class="pun">.</span><span class="typ">Scope</span><span class="pun">.</span><span class="typ">Add</span><span class="pun">(</span><span class="str">"poweruser"</span><span class="pun">);</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> </span><span class="kwd">true</span><span class="pun">;</span><span class="pln">
 </span><span class="pun">}</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">bool</span><span class="pln"> </span><span class="typ">IsResourceOwnerCredentialValid</span><span class="pun">(</span><span class="kwd">string</span><span class="pln"> userName</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">string</span><span class="pln"> password</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> </span><span class="kwd">true</span><span class="pun">;</span><span class="pln"> </span><span class="pun">}</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="typ">DotNetOpenAuth</span><span class="pun">.</span><span class="typ">Messaging</span><span class="pun">.</span><span class="typ">Bindings</span><span class="pun">.</span><span class="typ">INonceStore</span><span class="pln"> </span><span class="typ">VerificationCodeNonceStore</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">get</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">throw</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">NotImplementedException</span><span class="pun">();</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln">
        </span>

 

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。

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客户端调用代码:

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调用API获取数据之前需要从IssueServer获取Token。

GetAccessToken:

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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”}

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客户端调用:

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