modules/keycloak-protocol-cas

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2021-12-18 85f6edeb1760479083a61133efb4e9e8ba02cf55

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