wcf - 如何通过 SAML 断言从 ACS 获取访问 token ？

Question

我能够从 ACS 中配置的各种身份提供程序中检索、解码安全 token (SWT)。现在我应该 - 根据示例 - 能够做到这一点:

String headerValue = string.Format("WRAP access_token=\"{0}\"", securityToken);

WebClient client = new WebClient();
client.Headers.Add("Authorization", headerValue);

using (Stream stream = client.OpenRead(@"http://xxx.cloudapp.net/xxx.svc/users"))
using (StreamReader reader = new StreamReader(stream))
{
    String response = reader.ReadToEnd();
}

例如，它在某种意义上对不存在的端点失败了。所以服务就在那里(安全)，服务器端的 token 模块和 token 验证器被调用， token 通过。所以不是这样。但无论如何，问题在于 响应包含登录页面的 HTML (其中包含身份提供者列表的那个)。似乎 token 验证没问题，但仍然不足以保证安全。

我现在应该怎么做才能从服务接收我的数据？有什么提示吗？

场景: http://tinyurl.com/WcfRestSaml

更新 :我已经包含了我想要实现的场景图片的链接。

更新 2 : 好的，我已经切换到 Saml2，但出现了同样的错误。然后我发现我需要断言来接收访问 token 。所以我做了:

WebClient client = new WebClient { BaseAddress = string.Format("https://{namespace}.accesscontrol.windows.net") };
NameValueCollection parameters = new NameValueCollection
{
    { "wrap_assertion_format", "SAML" },
    { "wrap_assertion", securityToken },
    { "wrap_scope", "http://{our}.cloudapp.net/" }
};

Byte[] responseBytes = client.UploadValues("WRAPv0.9", parameters);
String response = Encoding.UTF8.GetString(responseBytes);

这也会返回另一个错误:

Error:Code:401:SubCode:T0:Detail:ACS50008: SAML token is invalid.:TraceID:1d3774fa-a5e6-3e3b-a5e5-5a0bde6e0771:TimeStamp:2013-06-06 16:18:05Z

但这似乎应该返回我想要的访问 token 。

更新 3 : 没什么用，没地方收集信息，该死。我发布了一个完整的 token ，因为有人至少会注意到有问题(尽管我已经删除了敏感信息)。

<Assertion ID="_541a71ba-1e00-478c-8d2b-0beac3a35d35" IssueInstant="2013-06-07T11:38:31.741Z" Version="2.0" xmlns="urn:oasis:names:tc:SAML:2.0:assertion">
  <Issuer>https://{removed}.accesscontrol.windows.net/</Issuer>
  <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
    <ds:SignedInfo>
      <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
      <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />
      <ds:Reference URI="#_541a71ba-1e00-478c-8d2b-0beac3a35d35">
        <ds:Transforms>
          <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
          <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
        </ds:Transforms>
        <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
        <ds:DigestValue>{removed}</ds:DigestValue>
      </ds:Reference>
    </ds:SignedInfo>
    <ds:SignatureValue>{removed}</ds:SignatureValue>
    <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
      <X509Data>
        <X509Certificate>{removed}</X509Certificate>
      </X509Data>
    </KeyInfo>
  </ds:Signature>
  <Subject>
    <NameID>https://www.google.com/accounts/o8/id?id={removed}</NameID>
    <SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer" />
  </Subject>
  <Conditions NotBefore="2013-06-07T11:38:31.694Z" NotOnOrAfter="2013-06-07T12:38:31.694Z">
    <AudienceRestriction>
      <Audience>http://{removed}.cloudapp.net/</Audience>
    </AudienceRestriction>
  </Conditions>
  <AttributeStatement>
    <Attribute Name="http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress">
      <AttributeValue>{removed}</AttributeValue>
      <AttributeValue>https://www.google.com/accounts/o8/id?id={removed}</AttributeValue>
      <AttributeValue>{removed}</AttributeValue>
    </Attribute>
    <Attribute Name="http://schemas.microsoft.com/accesscontrolservice/2010/07/claims/identityprovider">
      <AttributeValue>Google</AttributeValue>
    </Attribute>
  </AttributeStatement>
</Assertion>

Answer 1

如上所述:

We've solved it with Microsoft Support, it was caused by the fact, the service was behind passive federation, and the process doesn't like obviously. I've solved it by creating a <RequestSecurityToken> envelope for the SAML2 assertion token, this way it "simulated" browser activity, and it works well and also plays well with passive federation (due to WS-TRUST envelope).

It needed to pass it first and then it connected to ACS.The problem wasn't in access token or SAML assertion at all. It was caused - as I've pointed out - by the fact that part of website was behind the custom STS federation. The WS Federation module was blocking reception of this token. When I enveloped it in RequestSecurityToken for WS Federation to chew on first. It then passed to ACS as presented in my question.