Strip off user-info from redirect URI when validating using wildcard (#61)
Closes keycloak/keycloak-private#58
Closes https://issues.redhat.com/browse/RHBK-679

Signed-off-by: rmartinc <rmartinc@redhat.com>

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

@@ -248,13 +248,24 @@
        return sb.toString();
    }

    // removes the queryString, fragment and userInfo from the redirect
    // to avoid comparing this when wildcards are used
    private static String stripOffRedirectForWildcard(String redirect) {
        return KeycloakUriBuilder.fromUri(redirect, false)
                .preserveDefaultPort()
                .userInfo(null)
                .replaceQuery(null)
                .fragment(null)
                .buildAsString();
    }

    // return the String that matched the redirect or null if not matched
    private static String matchesRedirects(Set<String> validRedirects, String redirect, boolean allowWildcards) {
        logger.tracef("matchesRedirects: redirect URL to check: %s, allow wildcards: %b, Configured valid redirect URLs: %s", redirect, allowWildcards, validRedirects);
        for (String validRedirect : validRedirects) {
            if (validRedirect.endsWith("*") && !validRedirect.contains("?") && allowWildcards) {
                // 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 the userInfo, query or fragment components - we don't check them when wildcards are effective
                String r = stripOffRedirectForWildcard(redirect);
                // strip off *
                int length = validRedirect.length() - 1;
                validRedirect = validRedirect.substring(0, length);