diff --git a/wifi/supplicant/1.1/Android.bp b/wifi/supplicant/1.1/Android.bp
index fafd6ad..832d1ad 100644
--- a/wifi/supplicant/1.1/Android.bp
+++ b/wifi/supplicant/1.1/Android.bp
@@ -8,6 +8,8 @@
     },
     srcs: [
         "ISupplicant.hal",
+        "ISupplicantStaIface.hal",
+        "ISupplicantStaIfaceCallback.hal",
         "ISupplicantStaNetwork.hal",
     ],
     interfaces: [
diff --git a/wifi/supplicant/1.1/ISupplicantStaIface.hal b/wifi/supplicant/1.1/ISupplicantStaIface.hal
new file mode 100644
index 0000000..025cc6a
--- /dev/null
+++ b/wifi/supplicant/1.1/ISupplicantStaIface.hal
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.wifi.supplicant@1.1;
+
+import @1.0::ISupplicantStaIface;
+import @1.1::ISupplicantStaIfaceCallback;
+import @1.0::SupplicantStatus;
+
+/**
+ * Interface exposed by the supplicant for each station mode network
+ * interface (e.g wlan0) it controls.
+ */
+interface ISupplicantStaIface extends @1.0::ISupplicantStaIface {
+
+    /**
+     * Register for callbacks from this interface.
+     *
+     * These callbacks are invoked for events that are specific to this interface.
+     * Registration of multiple callback objects is supported. These objects must
+     * be automatically deleted when the corresponding client process is dead or
+     * if this interface is removed.
+     *
+     * @param callback An instance of the |ISupplicantStaIfaceCallback| HIDL
+     *        interface object.
+     * @return status Status of the operation.
+     *         Possible status codes:
+     *         |SupplicantStatusCode.SUCCESS|,
+     *         |SupplicantStatusCode.FAILURE_UNKNOWN|,
+     *         |SupplicantStatusCode.FAILURE_IFACE_INVALID|
+     */
+    registerCallback_1_1(ISupplicantStaIfaceCallback callback)
+        generates (SupplicantStatus status);
+};
+
diff --git a/wifi/supplicant/1.1/ISupplicantStaIfaceCallback.hal b/wifi/supplicant/1.1/ISupplicantStaIfaceCallback.hal
new file mode 100644
index 0000000..8b92ee5
--- /dev/null
+++ b/wifi/supplicant/1.1/ISupplicantStaIfaceCallback.hal
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.wifi.supplicant@1.1;
+
+import @1.0::ISupplicantStaIfaceCallback;
+
+/**
+ * Callback Interface exposed by the supplicant service
+ * for each station mode interface (ISupplicantStaIface).
+ *
+ * Clients need to host an instance of this HIDL interface object and
+ * pass a reference of the object to the supplicant via the
+ * corresponding |ISupplicantStaIface.registerCallback_1_1| method.
+ */
+interface ISupplicantStaIfaceCallback extends @1.0::ISupplicantStaIfaceCallback {
+
+    /* EapErrorCode: Error code for EAP or EAP Method as per RFC-4186 */
+    enum EapErrorCode : uint32_t {
+        SIM_GENERAL_FAILURE_AFTER_AUTH = 0,
+        SIM_TEMPORARILY_DENIED = 1026,
+        SIM_NOT_SUBSCRIBED = 1031,
+        SIM_GENERAL_FAILURE_BEFORE_AUTH = 16384,
+        SIM_VENDOR_SPECIFIC_EXPIRED_CERT = 16385,
+    };
+
+    /**
+     * Used to indicate an EAP authentication failure.
+     */
+    oneway onEapFailure_1_1(EapErrorCode errorCode);
+};
+