package org.keycloak.protocol.cas.endpoints;
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import jakarta.ws.rs.Consumes;
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import jakarta.ws.rs.POST;
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import jakarta.ws.rs.Produces;
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import jakarta.ws.rs.core.MultivaluedMap;
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import jakarta.ws.rs.core.Response;
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import org.keycloak.dom.saml.v1.protocol.SAML11ResponseType;
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import org.keycloak.events.EventBuilder;
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import org.keycloak.events.EventType;
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import org.keycloak.models.KeycloakSession;
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import org.keycloak.models.RealmModel;
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import org.keycloak.models.UserModel;
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import org.keycloak.protocol.cas.CASLoginProtocol;
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import org.keycloak.protocol.cas.representations.CASErrorCode;
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import org.keycloak.protocol.cas.representations.SamlResponseHelper;
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import org.keycloak.protocol.cas.utils.CASValidationException;
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import org.keycloak.services.Urls;
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import org.xml.sax.InputSource;
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import javax.xml.namespace.NamespaceContext;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathExpression;
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import javax.xml.xpath.XPathExpressionException;
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import javax.xml.xpath.XPathFactory;
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import java.io.StringReader;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Optional;
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import static org.keycloak.protocol.cas.CASLoginProtocol.TARGET_PARAM;
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public class SamlValidateEndpoint extends AbstractValidateEndpoint {
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public SamlValidateEndpoint(KeycloakSession session, RealmModel realm, EventBuilder event) {
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super(session, realm, event.event(EventType.CODE_TO_TOKEN));
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}
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@POST
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@Consumes("text/xml;charset=utf-8")
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@Produces("text/xml;charset=utf-8")
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public Response validate(String input) {
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MultivaluedMap<String, String> queryParams = session.getContext().getUri().getQueryParameters();
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try {
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String soapAction = Optional.ofNullable(session.getContext().getRequestHeaders().getHeaderString("SOAPAction")).map(s -> s.trim().replace("\"", "")).orElse("");
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if (!soapAction.equals("http://www.oasis-open.org/committees/security")) {
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throw new CASValidationException(CASErrorCode.INTERNAL_ERROR, "Not a validation request", Response.Status.BAD_REQUEST);
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}
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String service = queryParams.getFirst(TARGET_PARAM);
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boolean renew = queryParams.containsKey(CASLoginProtocol.RENEW_PARAM);
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checkRealm();
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checkSsl();
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checkClient(service);
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String issuer = Urls.realmIssuer(session.getContext().getUri().getBaseUri(), realm.getName());
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String ticket = getTicket(input);
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checkTicket(ticket, renew);
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UserModel user = clientSession.getUserSession().getUser();
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Map<String, Object> attributes = getUserAttributes();
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SAML11ResponseType response = SamlResponseHelper.successResponse(issuer, user.getUsername(), attributes);
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return Response.ok(SamlResponseHelper.soap(response)).build();
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} catch (CASValidationException ex) {
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logger.warnf("Invalid SAML1.1 token %s", ex.getErrorDescription());
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SAML11ResponseType response = SamlResponseHelper.errorResponse(ex);
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return Response.ok().entity(SamlResponseHelper.soap(response)).build();
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}
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}
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private String getTicket(String input) {
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try {
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XPath xPath = XPathFactory.newInstance().newXPath();
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xPath.setNamespaceContext(new MapNamespaceContext(Collections.singletonMap("samlp", "urn:oasis:names:tc:SAML:1.0:protocol")));
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XPathExpression expression = xPath.compile("//samlp:AssertionArtifact/text()");
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return expression.evaluate(new InputSource(new StringReader(input)));
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} catch (XPathExpressionException ex) {
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, ex.getMessage(), Response.Status.BAD_REQUEST);
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}
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}
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private static class MapNamespaceContext implements NamespaceContext {
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Map<String, String> map;
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private MapNamespaceContext(Map<String, String> map) {
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this.map = map;
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}
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@Override
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public String getNamespaceURI(String s) {
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return map.get(s);
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}
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@Override
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public String getPrefix(String s) {
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return map.entrySet().stream().filter(e -> e.getValue().equals(s)).findFirst().map(Map.Entry::getKey).orElse(null);
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}
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@Override
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public Iterator<String> getPrefixes(String s) {
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return map.keySet().iterator();
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}
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}
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}
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