[英]Create SAML response based on SAML request
我已经开发了Java Web应用程序,并且想要实现SAML。 这些是我认为实施SAML正确的步骤。
我有一个示例代码,并且能够创建SAML请求及其类似内容
<samlp:AuthnRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
ID="_c7b796f4-bc16-4fcc-8c1d-36befffc39c2" Version="2.0"
IssueInstant="2014-10-30T11:21:08Z" ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
AssertionConsumerServiceURL="http://localhost:8080/mywebapp/consume.jsp">
<saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">http://localhost:8080/mywebapp
</saml:Issuer>
<samlp:NameIDPolicy
Format="urn:oasis:names:tc:SAML:2.0:nameid-format:unspecified"
AllowCreate="true"></samlp:NameIDPolicy>
<samlp:RequestedAuthnContext Comparison="exact">
<saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport
</saml:AuthnContextClassRef>
</samlp:RequestedAuthnContext>
</samlp:AuthnRequest>
我可以对其进行编码并发送到IdP。
我想创建示例Java代码来获取此SAML请求,然后创建SAML响应。 如何解码请求并验证它并创建响应? 并且我需要用证书在saml响应上签名吗? 然后发送回SP?
谢谢。
尽管这是一篇过时的文章,但是我添加了示例代码和我认为有用的参考。
SAMLResponse = hreq.getParameter("SAMLResponse");
InputSource inputSource = new InputSource(new StringReader(SAMLResponse));
SAMLReader samlReader = new SAMLReader();
response2 = org.opensaml.saml2.core.Response)samlReader.readFromFile(inputSource);
现在验证数字签名:
org.opensaml.saml2.core.Response response2 = (org.opensaml.saml2.core.Response)samlReader.readFromFile(inputSource);
//To fetch the digital signature from the response.
Signature signature = response2.getSignature();
X509Certificate certificate = (X509Certificate) keyStore.getCertificate(domainName);
//pull out the public key part of the certificate into a KeySpec
X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(certificate.getPublicKey().getEncoded());
//get KeyFactory object that creates key objects, specifying RSA - java.security.KeyFactory
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
//generate public key to validate signatures
PublicKey publicKey = keyFactory.generatePublic(publicKeySpec);
//we have the public key
BasicX509Credential publicCredential = new BasicX509Credential();
//add public key value
publicCredential.setPublicKey(publicKey);
//create SignatureValidator
SignatureValidator signatureValidator = new SignatureValidator(publicCredential);
//try to validate
try{
signatureValidator.validate(signature);
catch(Exception e){
//
}
现在获取断言图:
samlDetailsMap = setSAMLDetails(response2);
在上述逻辑中,使用以下私有方法提取所有断言属性。 最后,您将获得发送给您的所有字段的地图。
private Map<String, String> setSAMLDetails(org.opensaml.saml2.core.Response response2){
Map<String, String> samlDetailsMap = new HashMap<String, String>();
try {
List<Assertion> assertions = response2.getAssertions();
LOGGER.error("No of assertions : "+assertions.size());
for(Assertion assertion:assertions){
List<AttributeStatement> attributeStatements = assertion.getAttributeStatements();
for(AttributeStatement attributeStatement: attributeStatements){
List<Attribute> attributes = attributeStatement.getAttributes();
for(Attribute attribute: attributes){
String name = attribute.getName();
List<XMLObject> attributes1 = attribute.getAttributeValues();
for(XMLObject xmlObject : attributes1){
if(xmlObject instanceof XSString){
samlDetailsMap.put(name, ((XSString) xmlObject).getValue());
LOGGER.error("Name is : "+name+" value is : "+((XSString) xmlObject).getValue());
}else if(xmlObject instanceof XSAnyImpl){
String value = ((XSAnyImpl) xmlObject).getTextContent();
samlDetailsMap.put(name, value);
}
}
}
}
}
} catch (Exception e) {
LOGGER.error("Exception occurred while setting the saml details");
}
LOGGER.error("Exiting from setSAMLDetails method");
return samlDetailsMap;
}
添加新的类SAMLReader,如下所示:
import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.opensaml.DefaultBootstrap;
import org.opensaml.xml.Configuration;
import org.opensaml.xml.XMLObject;
import org.opensaml.xml.io.UnmarshallingException;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
public class SAMLReader {
private static DocumentBuilder builder;
static{
try{
DefaultBootstrap.bootstrap ();
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance ();
factory.setNamespaceAware (true);
builder = factory.newDocumentBuilder ();
}catch (Exception ex){
ex.printStackTrace ();
}
}
/**
*
* @param filename
* @return
* @throws IOException
* @throws UnmarshallingException
* @throws SAXException
*/
public XMLObject readFromFile (String filename)
throws IOException, UnmarshallingException, SAXException{
return fromElement (builder.parse (filename).getDocumentElement ());
}
/**
*
* @param is
* @return
* @throws IOException
* @throws UnmarshallingException
* @throws SAXException
*/
public XMLObject readFromFile (InputStream is)
throws IOException, UnmarshallingException, SAXException{
return fromElement (builder.parse (is).getDocumentElement ());
}
/**
*
* @param is
* @return
* @throws IOException
* @throws UnmarshallingException
* @throws SAXException
*/
public XMLObject readFromFile (InputSource is)
throws IOException, UnmarshallingException, SAXException{
return fromElement (builder.parse (is).getDocumentElement ());
}
/**
*
* @param element
* @return
* @throws IOException
* @throws UnmarshallingException
* @throws SAXException
*/
public static XMLObject fromElement (Element element)
throws IOException, UnmarshallingException, SAXException{
return Configuration.getUnmarshallerFactory ()
.getUnmarshaller (element).unmarshall (element);
}
}
您列出的步骤或多或少是正确的。 我唯一要指出的是,如果单词发送 (例如,在“ SP ...将SAML身份验证请求发送到IdP”中),则必须小心含义。 SAML允许SP和IdP之间零直接通信的身份验证方案。
另一个小的补充是SP也可以签署他的请求,因此您可能在两面都进行了签名验证。 SP方面的验证是强制性的。
如果要实现SAML,则可能需要检查现有解决方案之一,例如Shibboleth 。 如果您使用Spring和JBoss等平台,则可能需要检查Spring Security SAML或JBoss PicketLink 。 如果要降级 ,请检查OpenSAML 。
在我的公司中,我们以JBoss为标准,并对PicketLink感到非常满意。
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