Support JWT GrantType

Author: jorbaum

cloudfoundry-client-reactor/src/test/java/org/cloudfoundry/reactor/uaa/clients/ReactorClientsTest.java

@@ -24,6 +24,7 @@
 import static io.netty.handler.codec.http.HttpResponseStatus.OK;
 import static org.cloudfoundry.uaa.tokens.GrantType.AUTHORIZATION_CODE;
 import static org.cloudfoundry.uaa.tokens.GrantType.CLIENT_CREDENTIALS;
+import static org.cloudfoundry.uaa.tokens.GrantType.JWT_BEARER;
 import static org.cloudfoundry.uaa.tokens.GrantType.REFRESH_TOKEN;
 
 import java.time.Duration;
@@ -620,6 +621,7 @@ void get() {
                                 .allowedProviders("uaa", "ldap", "my-saml-provider")
                                 .authorities("clients.read", "clients.write")
                                 .authorizedGrantType(CLIENT_CREDENTIALS)
+                                .authorizedGrantType(JWT_BEARER)
                                 .autoApprove("true")
                                 .clientId("4Z3t1r")
                                 .lastModified(1468364445592L)

cloudfoundry-client-reactor/src/test/resources/fixtures/uaa/clients/GET_{id}_response.json

@@ -8,7 +8,8 @@
     "none"
   ],
   "authorized_grant_types": [
-    "client_credentials"
+    "client_credentials",
+    "urn:ietf:params:oauth:grant-type:jwt-bearer"
   ],
   "redirect_uri": [
     "http*://ant.path.wildcard/**/passback/*",

cloudfoundry-client/src/main/java/org/cloudfoundry/uaa/tokens/GrantType.java

@@ -39,6 +39,11 @@ public enum GrantType {
      */
     IMPLICIT("implicit"),
 
+    /**
+     * The JWT bearer grant type
+     */
+    JWT_BEARER("urn:ietf:params:oauth:grant-type:jwt-bearer"),
+
     /**
      * The password grant type
      */
@@ -68,6 +73,8 @@ public static GrantType from(String s) {
                 return PASSWORD;
             case "refresh_token":
                 return REFRESH_TOKEN;
+            case "urn:ietf:params:oauth:grant-type:jwt-bearer":
+                return JWT_BEARER;
             default:
                 throw new IllegalArgumentException(String.format("Unknown grant type: %s", s));
         }