modules/keycloak-protocol-cas

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2023-10-05 e46d5b727f0206f04b41a511d73f8b9510f97501

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74023a	1	package org.keycloak.protocol.cas.endpoints;
EH	2
fdb9f6	3	import jakarta.ws.rs.Consumes;
JK	4	import jakarta.ws.rs.POST;
	5	import jakarta.ws.rs.Produces;
	6	import jakarta.ws.rs.core.MultivaluedMap;
	7	import jakarta.ws.rs.core.Response;
74023a	8	import org.keycloak.dom.saml.v1.protocol.SAML11ResponseType;
EH	9	import org.keycloak.events.EventBuilder;
	10	import org.keycloak.events.EventType;
	11	import org.keycloak.models.RealmModel;
	12	import org.keycloak.models.UserModel;
	13	import org.keycloak.protocol.cas.CASLoginProtocol;
	14	import org.keycloak.protocol.cas.representations.CASErrorCode;
	15	import org.keycloak.protocol.cas.representations.SamlResponseHelper;
	16	import org.keycloak.protocol.cas.utils.CASValidationException;
	17	import org.keycloak.services.Urls;
	18	import org.xml.sax.InputSource;
	19
	20	import javax.xml.namespace.NamespaceContext;
	21	import javax.xml.xpath.XPath;
	22	import javax.xml.xpath.XPathExpression;
	23	import javax.xml.xpath.XPathExpressionException;
	24	import javax.xml.xpath.XPathFactory;
	25	import java.io.StringReader;
fdb9f6	26	import java.util.Collections;
JK	27	import java.util.Iterator;
	28	import java.util.Map;
	29	import java.util.Optional;
74023a	30
EH	31	import static org.keycloak.protocol.cas.CASLoginProtocol.TARGET_PARAM;
	32
	33	public class SamlValidateEndpoint extends AbstractValidateEndpoint {
	34	public SamlValidateEndpoint(RealmModel realm, EventBuilder event) {
	35	super(realm, event.event(EventType.CODE_TO_TOKEN));
	36	}
	37
	38	@POST
	39	@Consumes("text/xml;charset=utf-8")
	40	@Produces("text/xml;charset=utf-8")
	41	public Response validate(String input) {
4a0a62	42	MultivaluedMap<String, String> queryParams = session.getContext().getUri().getQueryParameters();
74023a	43	try {
4a0a62	44	String soapAction = Optional.ofNullable(session.getContext().getRequestHeaders().getHeaderString("SOAPAction")).map(s -> s.trim().replace("\"", "")).orElse("");
74023a	45	if (!soapAction.equals("http://www.oasis-open.org/committees/security")) {
EH	46	throw new CASValidationException(CASErrorCode.INTERNAL_ERROR, "Not a validation request", Response.Status.BAD_REQUEST);
	47	}
	48
	49	String service = queryParams.getFirst(TARGET_PARAM);
	50	boolean renew = queryParams.containsKey(CASLoginProtocol.RENEW_PARAM);
	51
	52	checkRealm();
	53	checkSsl();
	54	checkClient(service);
4a0a62	55	String issuer = Urls.realmIssuer(session.getContext().getUri().getBaseUri(), realm.getName());
74023a	56	String ticket = getTicket(input);
EH	57
	58	checkTicket(ticket, renew);
	59	UserModel user = clientSession.getUserSession().getUser();
	60
	61	Map<String, Object> attributes = getUserAttributes();
	62
	63	SAML11ResponseType response = SamlResponseHelper.successResponse(issuer, user.getUsername(), attributes);
	64
	65	return Response.ok(SamlResponseHelper.soap(response)).build();
	66
	67	} catch (CASValidationException ex) {
	68	logger.warnf("Invalid SAML1.1 token %s", ex.getErrorDescription());
	69
	70	SAML11ResponseType response = SamlResponseHelper.errorResponse(ex);
	71	return Response.ok().entity(SamlResponseHelper.soap(response)).build();
	72	}
	73	}
	74
	75	private String getTicket(String input) {
	76	try {
	77	XPath xPath = XPathFactory.newInstance().newXPath();
	78	xPath.setNamespaceContext(new MapNamespaceContext(Collections.singletonMap("samlp", "urn:oasis:names:tc:SAML:1.0:protocol")));
	79
	80	XPathExpression expression = xPath.compile("//samlp:AssertionArtifact/text()");
	81
	82	return expression.evaluate(new InputSource(new StringReader(input)));
	83	} catch (XPathExpressionException ex) {
	84	throw new CASValidationException(CASErrorCode.INVALID_TICKET, ex.getMessage(), Response.Status.BAD_REQUEST);
	85	}
	86	}
	87
	88	private static class MapNamespaceContext implements NamespaceContext {
	89	Map<String, String> map;
	90
	91	private MapNamespaceContext(Map<String, String> map) {
	92	this.map = map;
	93	}
	94
	95	@Override
	96	public String getNamespaceURI(String s) {
	97	return map.get(s);
	98	}
	99
	100	@Override
	101	public String getPrefix(String s) {
	102	return map.entrySet().stream().filter(e -> e.getValue().equals(s)).findFirst().map(Map.Entry::getKey).orElse(null);
	103	}
	104
	105	@Override
	106	public Iterator<String> getPrefixes(String s) {
	107	return map.keySet().iterator();
	108	}
	109	}
	110	}