消费SAMLResponse令牌

问题描述

基于SAML SP身份验证以下简称工作流程。

SAML sp-based authentication has following short workflow.

• 用户希望在SP上访问应用程序。


• SP发送SAMLRequest令牌IDP。


• IDP消耗，并产生SAMLResponse令牌。


• IDP发送该SAMLResponse令牌由SP给出AC-URL。

我的问题是如何消耗SP这个SAMLResponse令牌。
这是什么逻辑？
如果我能得到一些JAVA code有助于将是有益的。

My Question is how sp consume this SAMLResponse token.What is the logic?If I can get some JAVA code help it will be beneficial.

推荐答案

接下来的食谱是为我工作：

The next recipe is working for me:

1. 获取SAMLResponse令牌和去code，并夸大：

1. Get the SAMLResponse token and decode it and inflate:

// Base64 decode
Base64 base64Decoder = new Base64();
byte[] xmlBytes = encodedXmlString.getBytes("UTF-8");
byte[] base64DecodedByteArray = base64Decoder.decode(xmlBytes);

// Inflate (uncompress) the AuthnRequest data
// First attempt to unzip the byte array according to DEFLATE (rfc 1951)

Inflater inflater = new Inflater(true);
inflater.setInput(base64DecodedByteArray);
// since we are decompressing, it's impossible to know how much space we
// might need; hopefully this number is suitably big
byte[] xmlMessageBytes = new byte[5000];
int resultLength = inflater.inflate(xmlMessageBytes);

if (!inflater.finished()) {
    throw new RuntimeException("didn't allocate enough space to hold "
            + "decompressed data");
}

inflater.end();

String decodedResponse = new String(xmlMessageBytes, 0, resultLength,
        "UTF-8");

return decodedResponse;

解析生成的XML。在这里，你可以得到你所需要的信息，并举例来说，创造的 POJO 的它（这是一个简单的code解析LogoutRequest的，但会为回应是类似）：

Parse the resulting XML. Here you can get the info that you need and for example, create a POJO with it (this is a sample code for parsing LogoutRequest's but would be analogous for responses):

// Parse the XML. SAX approach, we just need the ID attribute
SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();

// If we want to validate the doc we need to load the DTD
// saxParserFactory.setValidating(true);

// Get a SAXParser instance
SAXParser saxParser = saxParserFactory.newSAXParser();

// Parse it
XMLhandler xmLhandler = new XMLhandler();
saxParser.parse(new ByteArrayInputStream(xmlLogoutRequest.getBytes()),
        xmLhandler);

// Return the SamlVO
return xmLhandler.getSamlVO();

有关我的使用案例，我只有几个元素有趣，所以我使用的 SAX 的：

For my use case I am interesting in only a few elements, so I am using SAX:

public class XMLhandler extends DefaultHandler {

    private SamlVO samlVO;

    public XMLhandler() {
        samlVO = new SamlVO();
    }

    @Override
    public void startElement(String uri, String localName, String qName,
        Attributes attributes) throws SAXException {

        // Managing a LogoutRequest means that we are going to build a LogoutResponse
        if (qName.equals("samlp:LogoutRequest")) {
            // The ID value of a request will be the LogoutResponse's InReponseTo attribute 
            samlVO.setInResponseTo(attributes.getValue("ID"));
            // From the destination we can get the Issuer element
            String destination = attributes.getValue("Destination");
            if (destination != null) {
                URL destinationUrl = null;
                try {
                    destinationUrl = new URL(destination);
                } catch (MalformedURLException e) {
                     // TODO: We could set the server hostname (take it from a property), but this URL SHOULD be well formed!
                     e.printStackTrace();
                }
                samlVO.setIssuer(destinationUrl.getHost());
            }
        }   
    }

    public SamlVO getSamlVO() {
        return samlVO;
    }

}

希望它帮助，

路易斯

PS：你也可以使用一个图书馆一样OpenSAML

PS: you also can use a library like OpenSAML

DefaultBootstrap.bootstrap();

HTTPRedirectDeflateDecoder decode = new HTTPRedirectDeflateDecoder(new BasicParserPool());
BasicSAMLMessageContext<LogoutRequest, ?, ?> messageContext = new BasicSAMLMessageContext<LogoutRequest, SAMLObject, SAMLObject>();
messageContext.setInboundMessageTransport(new HttpServletRequestAdapter(request));
decode.decode(messageContext);
XMLObjectBuilderFactory builderFactory = org.opensaml.Configuration.getBuilderFactory();
LogoutRequestBuilder logoutRequestBuilder = (LogoutRequestBuilder) builderFactory.getBuilder(LogoutRequest.DEFAULT_ELEMENT_NAME);
LogoutRequest logoutRequest = logoutRequestBuilder.buildObject();
logoutRequest = (LogoutRequest) messageContext.getInboundMessage();

但要ppared包括在CLASSPATH一些库$ P $！

But be prepared to include a few libraries in your CLASSPATH!!!

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