Question

基于SAML sp的身份验证具有以下简短的工作流程。

用户希望在sp。
sp将SAMLRequest令牌发送给idp。
idp使用它并生成SAMLResponse令牌。
idp将此SAMLResponse令牌发送到sp。

我的问题是sp如何使用此SAMLResponse令牌。逻辑是什么？如果我能获得一些JAVA代码帮助它将是有益的。

Answer 1

下一个食谱对我有用：

获取SAMLResponse令牌并解码并充气：

// 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，您可以获得所需的信息，例如，使用它创建 POJO （这是用于解析LogoutRequest的示例代码，但与响应类似）：

// 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();

对于我的用例，我只对几个元素感兴趣，所以我使用 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;
    }

}

希望它有所帮助，

路易斯

PS：你也可以使用像OpenSAML这样的库

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();

但是要准备好在CLASSPATH中包含几个库!!!

Answer 2

要求代码有点多，但基本处理是SP验证SAMLResponse，包括良好格式，所需值的存在，正确的协议以及任何其他SP特定的验证（时间限制，数据通信）等），将在令牌中识别的用户映射到SP上的用户（可能涉及创建用户），并将用户转移到所请求的资源。

Answer 3

以下是我在Java中的使用方法。我使用XMLBeans来解析SAMLResponse，然后对其进行解密（如果它已加密），然后验证签名：

WebBrowserSSOAuthConsumerService

使用SAMLResponse令牌

3 个答案: