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

@@ -26,6 +26,7 @@

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;
@@ -54,7 +55,7 @@

    public static Set<String> resolveValidRedirects(UriInfo uriInfo, 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("/")) {
@@ -69,12 +70,18 @@
    private static Set<String> getValidateRedirectUris(UriInfo uriInfo, RealmModel realm) {
        Set<String> redirects = new HashSet<>();
        for (ClientModel client : realm.getClients()) {
            redirects.addAll(resolveValidRedirects(uriInfo, client.getRootUrl(), client.getRedirectUris()));
            if (client.isEnabled()) {
                redirects.addAll(resolveValidRedirects(uriInfo, client.getRootUrl(), client.getRedirectUris()));
            }
        }
        return redirects;
    }

    private static String verifyRedirectUri(UriInfo uriInfo, String rootUrl, String redirectUri, RealmModel realm, Set<String> validRedirects, boolean requireRedirectUri) {

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

        if (redirectUri == null) {
            if (!requireRedirectUri) {
                redirectUri = getSingleValidRedirectUri(validRedirects);
@@ -170,4 +177,12 @@
        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());
        }
    }
}