implemented server-initiated phase2 of EAP-TTLS authentication

src/libcharon/plugins/eap_ttls/eap_ttls_peer.c

@@ -133,22 +133,30 @@ METHOD(tls_application_t, process, status_t,
 		return FAILED;
 	}
 
-	if (this->method->process(this->method, in, &this->out) == NEED_MORE)
+	status = this->method->process(this->method, in, &this->out);
-	{
-		in->destroy(in);
-		return NEED_MORE;
-	}
-
-	if (vendor)
-	{
-		DBG1(DBG_IKE, "vendor specific EAP method %d-%d failed", type, vendor);
-	}
-	else
-	{
-		DBG1(DBG_IKE, "%N method failed", eap_type_names, type);
-	}
 	in->destroy(in);
-	return FAILED;
+
+	switch (status)
+	{
+		case SUCCESS:
+			this->method->destroy(this->method);
+			this->method = NULL;
+			/* fall through to NEED_MORE since response must be sent */
+		case NEED_MORE:
+			return NEED_MORE;
+		case FAILED:
+		default:
+			if (vendor)
+			{
+				DBG1(DBG_IKE, "vendor specific EAP method %d-%d failed",
+							   type, vendor);
+			}
+			else
+			{
+				DBG1(DBG_IKE, "%N method failed", eap_type_names, type);
+			}
+			return FAILED;
+ 	}		
 }
 
 METHOD(tls_application_t, build, status_t,

src/libcharon/plugins/eap_ttls/eap_ttls_server.c

@@ -201,12 +201,23 @@ METHOD(tls_application_t, process, status_t,
 			DBG1(DBG_IKE, "%N phase2 authentication of '%Y' with %N successful",
 							eap_type_names, EAP_TTLS, this->peer,
 							eap_type_names, type);
+			this->method->destroy(this->method);
+			this->method = NULL;
 			break;
 		case NEED_MORE:
 			break;
 		case FAILED:
 		default:
-			DBG1(DBG_IKE, "%N method failed", eap_type_names, type);
+			if (vendor)
+			{
+				DBG1(DBG_IKE, "vendor specific EAP method %d-%d failed",
+							   type, vendor);
+			}
+			else
+			{
+				DBG1(DBG_IKE, "%N method failed", eap_type_names, type);
+			}
+			return FAILED;
  	}		
 	return status;
 }
@@ -219,6 +230,24 @@ METHOD(tls_application_t, build, status_t,
 	eap_type_t type;
 	u_int32_t vendor;
 
+	if (this->method == NULL && this->start_phase2 &&
+		lib->settings->get_bool(lib->settings,
+			 	"charon.plugins.eap-ttls.phase2_piggyback", FALSE))
+	{
+		/* generate an EAP Identity request which will be piggybacked right
+		 * onto the TLS Finished message thus initiating EAP-TTLS phase2
+		 */
+		this->method = charon->eap->create_instance(charon->eap, EAP_IDENTITY,
+								 0,	EAP_SERVER, this->server, this->peer);
+		if (this->method == NULL)
+		{
+			DBG1(DBG_IKE, "EAP_IDENTITY method not available");
+			return FAILED;
+		}
+		this->method->initiate(this->method, &this->out);
+		this->start_phase2 = FALSE;
+	}
+
 	if (this->out)
 	{
 		code = this->out->get_code(this->out);