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

@@ -17,72 +17,105 @@

package org.keycloak.protocol.oidc.utils;

import org.jboss.logging.Logger;
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.ServicesLogger;
import org.keycloak.services.util.ResolveRelative;

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

/**
 * @author <a href="mailto:sthorger@redhat.com">Stian Thorgersen</a>
 */
public class RedirectUtils {

    private static final ServicesLogger logger = ServicesLogger.ROOT_LOGGER;
    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) {
        Set<String> validRedirects = client.getRedirectUris();
        return verifyRedirectUri(uriInfo, client.getRootUrl(), redirectUri, realm, validRedirects);
    public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client) {
        return verifyRedirectUri(session, redirectUri, client, true);
    }

    public static Set<String> resolveValidRedirects(UriInfo uriInfo, String rootUrl, Set<String> validRedirects) {
    public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client, boolean requireRedirectUri) {
        if (client != null)
            return verifyRedirectUri(session, client.getRootUrl(), redirectUri, client.getRedirectUris(), requireRedirectUri);
        return null;
    }

    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) {
        Set<String> redirects = new HashSet<>();
        for (ClientModel client : realm.getClients()) {
            redirects.addAll(resolveValidRedirects(uriInfo, client.getRootUrl(), client.getRedirectUris()));
        }
        return redirects;
    private static Set<String> getValidateRedirectUris(KeycloakSession session) {
        return session.getContext().getRealm().getClientsStream()
                .filter(ClientModel::isEnabled)
                .map(c -> resolveValidRedirects(session, c.getRootUrl(), c.getRedirectUris()))
                .flatMap(Collection::stream)
                .collect(Collectors.toSet());
    }

    private static String verifyRedirectUri(UriInfo uriInfo, String rootUrl, String redirectUri, RealmModel realm, Set<String> validRedirects) {
    public 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) {
            try {
                URI uri = URI.create(redirectUri);
                redirectUri = uri.normalize().toString();
            } catch (IllegalArgumentException cause) {
                logger.debug("Invalid redirect uri", cause);
                return null;
            } catch (Exception cause) {
                logger.debug("Unexpected error when parsing redirect uri", cause);
                return null;
            }
        }

        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;
        } else {
            redirectUri = lowerCaseHostname(redirectUri);

            String r = redirectUri.indexOf('?') != -1 ? redirectUri.substring(0, redirectUri.indexOf('?')) : redirectUri;
            Set<String> resolveValidRedirects = resolveValidRedirects(uriInfo, rootUrl, validRedirects);
            String r = redirectUri;
            Set<String> resolveValidRedirects = resolveValidRedirects(session, rootUrl, validRedirects);

            boolean valid = matchesRedirects(resolveValidRedirects, r);

            if (!valid && r.startsWith(Constants.INSTALLED_APP_URL) && r.indexOf(':', Constants.INSTALLED_APP_URL.length()) >= 0) {
            if (!valid && (r.startsWith(Constants.INSTALLED_APP_URL) || r.startsWith(Constants.INSTALLED_APP_LOOPBACK)) && r.indexOf(':', Constants.INSTALLED_APP_URL.length()) >= 0) {
                int i = r.indexOf(':', Constants.INSTALLED_APP_URL.length());

                StringBuilder sb = new StringBuilder();
@@ -98,7 +131,7 @@
                valid = matchesRedirects(resolveValidRedirects, r);
            }
            if (valid && redirectUri.startsWith("/")) {
                redirectUri = relativeToAbsoluteURI(uriInfo, rootUrl, redirectUri);
                redirectUri = relativeToAbsoluteURI(session, rootUrl, redirectUri);
            }
            redirectUri = valid ? redirectUri : null;
        }
@@ -119,33 +152,61 @@
        }
    }

    private static String relativeToAbsoluteURI(UriInfo uriInfo, String rootUrl, String relative) {
        if (rootUrl == null || rootUrl.isEmpty()) {
            URI baseUri = uriInfo.getBaseUri();
            String uri = baseUri.getScheme() + "://" + baseUri.getHost();
            if (baseUri.getPort() != -1) {
                uri += ":" + baseUri.getPort();
            }
            rootUrl = uri;
    private static String relativeToAbsoluteURI(KeycloakSession session, String rootUrl, String relative) {
        if (rootUrl != null) {
            rootUrl = ResolveRelative.resolveRootUrl(session, rootUrl);
        }
        relative = rootUrl + relative;
        return relative;

        if (rootUrl == null || rootUrl.isEmpty()) {
            rootUrl = UriUtils.getOrigin(session.getContext().getUri().getBaseUri());
        }
        StringBuilder sb = new StringBuilder();
        sb.append(rootUrl);
        sb.append(relative);
        return sb.toString();
    }

    private static boolean matchesRedirects(Set<String> validRedirects, String redirect) {
        for (String validRedirect : validRedirects) {
            if (validRedirect.endsWith("*")) {
            if (validRedirect.endsWith("*") && !validRedirect.contains("?")) {
                // strip off the query component - we don't check them when wildcards are effective
                String r = redirect.contains("?") ? redirect.substring(0, redirect.indexOf("?")) : redirect;
                // strip off *
                int length = validRedirect.length() - 1;
                validRedirect = validRedirect.substring(0, length);
                if (redirect.startsWith(validRedirect)) return true;
                if (r.startsWith(validRedirect)) return true;
                // strip off trailing '/'
                if (length - 1 > 0 && validRedirect.charAt(length - 1) == '/') length--;
                validRedirect = validRedirect.substring(0, length);
                if (validRedirect.equals(redirect)) return true;
                if (validRedirect.equals(r)) return true;
            } else if (validRedirect.equals(redirect)) return true;
        }
        return false;
    }

    private static String getSingleValidRedirectUri(Collection<String> validRedirects) {
        if (validRedirects.size() != 1) return null;
        String validRedirect = validRedirects.iterator().next();
        return validateRedirectUriWildcard(validRedirect);
    }

    public static String validateRedirectUriWildcard(String redirectUri) {
        if (redirectUri == null)
            return null;

        int idx = redirectUri.indexOf("/*");
        if (idx > -1) {
            redirectUri = redirectUri.substring(0, idx);
        }
        return redirectUri;
    }

    private static String getFirstValidRedirectUri(Collection<String> validRedirects) {
        final String redirectUri = validRedirects.stream().findFirst().orElse(null);
        return (redirectUri != null) ? validateRedirectUriWildcard(redirectUri) : null;
    }

    public static String getFirstValidRedirectUri(KeycloakSession session, String rootUrl, Set<String> validRedirects) {
        return getFirstValidRedirectUri(resolveValidRedirects(session, rootUrl, validRedirects));
    }
}