src/main/java/org/keycloak/protocol/cas/utils/RedirectUtils.java

@@ -21,11 +21,15 @@
import org.keycloak.common.util.UriUtils;
import org.keycloak.models.ClientModel;
import org.keycloak.models.Constants;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.KeycloakUriInfo;
import org.keycloak.models.RealmModel;
import org.keycloak.services.Urls;
import org.keycloak.services.util.ResolveRelative;

import javax.ws.rs.core.UriInfo;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

@@ -36,43 +40,62 @@

    private static final Logger logger = Logger.getLogger(RedirectUtils.class);

    public static String verifyRealmRedirectUri(UriInfo uriInfo, String redirectUri, RealmModel realm) {
        Set<String> validRedirects = getValidateRedirectUris(uriInfo, realm);
        return verifyRedirectUri(uriInfo, null, redirectUri, realm, validRedirects);
    public static String verifyRealmRedirectUri(KeycloakSession session, String redirectUri) {
        Set<String> validRedirects = getValidateRedirectUris(session);
        return verifyRedirectUri(session, null, redirectUri, validRedirects, true);
    }

    public static String verifyRedirectUri(UriInfo uriInfo, String redirectUri, RealmModel realm, ClientModel client) {
    public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client) {
        return verifyRedirectUri(session, redirectUri, client, true);
    }

    public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client, boolean requireRedirectUri) {
        if (client != null)
            return verifyRedirectUri(uriInfo, client.getRootUrl(), redirectUri, realm, client.getRedirectUris());
            return verifyRedirectUri(session, client.getRootUrl(), redirectUri, client.getRedirectUris(), requireRedirectUri);
        return null;
    }

    public static Set<String> resolveValidRedirects(UriInfo uriInfo, String rootUrl, Set<String> validRedirects) {
    public static Set<String> resolveValidRedirects(KeycloakSession session, String rootUrl, Set<String> validRedirects) {
        // If the valid redirect URI is relative (no scheme, host, port) then use the request's scheme, host, and port
        Set<String> resolveValidRedirects = new HashSet<String>();
        Set<String> resolveValidRedirects = new HashSet<>();
        for (String validRedirect : validRedirects) {
            resolveValidRedirects.add(validRedirect); // add even relative urls.
            if (validRedirect.startsWith("/")) {
                validRedirect = relativeToAbsoluteURI(uriInfo, rootUrl, validRedirect);
                validRedirect = relativeToAbsoluteURI(session, rootUrl, validRedirect);
                logger.debugv("replacing relative valid redirect with: {0}", validRedirect);
                resolveValidRedirects.add(validRedirect);
            } else {
                resolveValidRedirects.add(validRedirect);
            }
        }
        return resolveValidRedirects;
    }

    private static Set<String> getValidateRedirectUris(UriInfo uriInfo, RealmModel realm) {
    private static Set<String> getValidateRedirectUris(KeycloakSession session) {
        Set<String> redirects = new HashSet<>();
        for (ClientModel client : realm.getClients()) {
            redirects.addAll(resolveValidRedirects(uriInfo, client.getRootUrl(), client.getRedirectUris()));
        for (ClientModel client : session.getContext().getRealm().getClients()) {
            if (client.isEnabled()) {
                redirects.addAll(resolveValidRedirects(session, client.getRootUrl(), client.getRedirectUris()));
            }
        }
        return redirects;
    }

    private static String verifyRedirectUri(UriInfo uriInfo, String rootUrl, String redirectUri, RealmModel realm, Set<String> validRedirects) {
    private static String verifyRedirectUri(KeycloakSession session, String rootUrl, String redirectUri, Set<String> validRedirects, boolean requireRedirectUri) {
        KeycloakUriInfo uriInfo = session.getContext().getUri();
        RealmModel realm = session.getContext().getRealm();

        if (redirectUri != null)
            redirectUri = normalizeUrl(redirectUri);

        if (redirectUri == null) {
            logger.debug("No Redirect URI parameter specified");
            return null;
            if (!requireRedirectUri) {
                redirectUri = getSingleValidRedirectUri(validRedirects);
            }

            if (redirectUri == null) {
                logger.debug("No Redirect URI parameter specified");
                return null;
            }
        } else if (validRedirects.isEmpty()) {
            logger.debug("No Redirect URIs supplied");
            redirectUri = null;
@@ -80,7 +103,7 @@
            redirectUri = lowerCaseHostname(redirectUri);

            String r = redirectUri;
            Set<String> resolveValidRedirects = resolveValidRedirects(uriInfo, rootUrl, validRedirects);
            Set<String> resolveValidRedirects = resolveValidRedirects(session, rootUrl, validRedirects);

            boolean valid = matchesRedirects(resolveValidRedirects, r);

@@ -100,7 +123,7 @@
                valid = matchesRedirects(resolveValidRedirects, r);
            }
            if (valid && redirectUri.startsWith("/")) {
                redirectUri = relativeToAbsoluteURI(uriInfo, rootUrl, redirectUri);
                redirectUri = relativeToAbsoluteURI(session, rootUrl, redirectUri);
            }
            redirectUri = valid ? redirectUri : null;
        }
@@ -121,9 +144,13 @@
        }
    }

    private static String relativeToAbsoluteURI(UriInfo uriInfo, String rootUrl, String relative) {
    private static String relativeToAbsoluteURI(KeycloakSession session, String rootUrl, String relative) {
        if (rootUrl != null) {
            rootUrl = ResolveRelative.resolveRootUrl(session, rootUrl);
        }

        if (rootUrl == null || rootUrl.isEmpty()) {
            rootUrl = UriUtils.getOrigin(uriInfo.getBaseUri());
            rootUrl = UriUtils.getOrigin(session.getContext().getUri().getBaseUri());
        }
        StringBuilder sb = new StringBuilder();
        sb.append(rootUrl);
@@ -149,4 +176,22 @@
        return false;
    }

    private static String getSingleValidRedirectUri(Collection<String> validRedirects) {
        if (validRedirects.size() != 1) return null;
        String validRedirect = validRedirects.iterator().next();
        int idx = validRedirect.indexOf("/*");
        if (idx > -1) {
            validRedirect = validRedirect.substring(0, idx);
        }
        return validRedirect;
    }

    private static String normalizeUrl(String url) {
        try {
            URI uri = new URI(url);
            return uri.normalize().toString();
        } catch (URISyntaxException e) {
            throw new IllegalArgumentException("Invalid URL syntax: " + e.getMessage());
        }
    }
}