diff --git a/gatekeeperd/Android.bp b/gatekeeperd/Android.bp
index 2d9a820..27a6452 100644
--- a/gatekeeperd/Android.bp
+++ b/gatekeeperd/Android.bp
@@ -28,7 +28,6 @@
 
     shared_libs: [
         "libbinder",
-        "libbinder_ndk",
         "libgatekeeper",
         "libgsi",
         "liblog",
@@ -41,8 +40,6 @@
         "libhidlbase",
         "android.hardware.gatekeeper@1.0",
         "libgatekeeper_aidl",
-        "android.hardware.security.keymint-unstable-ndk_platform",
-        "android.security.authorization-ndk_platform",
     ],
 
     static_libs: ["libscrypt_static"],
diff --git a/gatekeeperd/gatekeeperd.cpp b/gatekeeperd/gatekeeperd.cpp
index ced7573..b982dbc 100644
--- a/gatekeeperd/gatekeeperd.cpp
+++ b/gatekeeperd/gatekeeperd.cpp
@@ -19,44 +19,42 @@
 #include <android/service/gatekeeper/BnGateKeeperService.h>
 #include <gatekeeper/GateKeeperResponse.h>
 
-#include <endian.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <inttypes.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <memory>
 
+#include <android/security/keystore/IKeystoreService.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
-#include <android/binder_manager.h>
-#include <android/security/keystore/IKeystoreService.h>
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
 #include <binder/PermissionCache.h>
-#include <gatekeeper/password_handle.h>  // for password_handle_t
+#include <gatekeeper/password_handle.h> // for password_handle_t
+#include <hardware/gatekeeper.h>
 #include <hardware/hw_auth_token.h>
+#include <keystore/keystore.h> // For error code
 #include <keystore/keystore_return_types.h>
 #include <libgsi/libgsi.h>
 #include <log/log.h>
+#include <utils/Log.h>
 #include <utils/String16.h>
 
-#include <aidl/android/hardware/security/keymint/HardwareAuthToken.h>
-#include <aidl/android/security/authorization/IKeystoreAuthorization.h>
-#include <android/hardware/gatekeeper/1.0/IGatekeeper.h>
 #include <hidl/HidlSupport.h>
+#include <android/hardware/gatekeeper/1.0/IGatekeeper.h>
 
 using android::sp;
-using android::hardware::Return;
-using android::hardware::gatekeeper::V1_0::GatekeeperResponse;
-using android::hardware::gatekeeper::V1_0::GatekeeperStatusCode;
 using android::hardware::gatekeeper::V1_0::IGatekeeper;
+using android::hardware::gatekeeper::V1_0::GatekeeperStatusCode;
+using android::hardware::gatekeeper::V1_0::GatekeeperResponse;
+using android::hardware::Return;
 
 using ::android::binder::Status;
 using ::android::service::gatekeeper::BnGateKeeperService;
 using GKResponse = ::android::service::gatekeeper::GateKeeperResponse;
 using GKResponseCode = ::android::service::gatekeeper::ResponseCode;
-using ::aidl::android::hardware::security::keymint::HardwareAuthenticatorType;
-using ::aidl::android::hardware::security::keymint::HardwareAuthToken;
-using ::aidl::android::security::authorization::IKeystoreAuthorization;
 
 namespace android {
 
@@ -64,7 +62,7 @@
 static const String16 DUMP_PERMISSION("android.permission.DUMP");
 
 class GateKeeperProxy : public BnGateKeeperService {
-  public:
+public:
     GateKeeperProxy() {
         clear_state_if_needed_done = false;
         hw_device = IGatekeeper::getService();
@@ -75,7 +73,8 @@
         }
     }
 
-    virtual ~GateKeeperProxy() {}
+    virtual ~GateKeeperProxy() {
+    }
 
     void store_sid(uint32_t userId, uint64_t sid) {
         char filename[21];
@@ -97,7 +96,7 @@
         if (mark_cold_boot() && !is_running_gsi) {
             ALOGI("cold boot: clearing state");
             if (hw_device) {
-                hw_device->deleteAllUsers([](const GatekeeperResponse&) {});
+                hw_device->deleteAllUsers([](const GatekeeperResponse &){});
             }
         }
 
@@ -105,7 +104,7 @@
     }
 
     bool mark_cold_boot() {
-        const char* filename = ".coldboot";
+        const char *filename = ".coldboot";
         if (access(filename, F_OK) == -1) {
             int fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR);
             if (fd < 0) {
@@ -300,34 +299,7 @@
 
         if (gkResponse->response_code() == GKResponseCode::OK) {
             if (gkResponse->payload().size() != 0) {
-                // try to connect to IKeystoreAuthorization AIDL service first.
-                ::ndk::SpAIBinder authzBinder(
-                        AServiceManager_getService("android.security.authorization"));
-                auto authzService = IKeystoreAuthorization::fromBinder(authzBinder);
-                if (authzService) {
-                    if (gkResponse->payload().size() != sizeof(hw_auth_token_t)) {
-                        LOG(ERROR) << "Incorrect size of AuthToken payload.";
-                        return GK_ERROR;
-                    }
-
-                    const hw_auth_token_t* hwAuthToken =
-                            reinterpret_cast<const hw_auth_token_t*>(gkResponse->payload().data());
-                    HardwareAuthToken authToken;
-
-                    authToken.timestamp.milliSeconds = betoh64(hwAuthToken->timestamp);
-                    authToken.challenge = hwAuthToken->challenge;
-                    authToken.authenticatorId = hwAuthToken->authenticator_id;
-                    authToken.authenticatorType = static_cast<HardwareAuthenticatorType>(
-                            betoh32(hwAuthToken->authenticator_type));
-                    authToken.mac.assign(&hwAuthToken->hmac[0], &hwAuthToken->hmac[32]);
-                    auto result = authzService->addAuthToken(authToken);
-                    if (!result.isOk()) {
-                        LOG(ERROR) << "Failure in sending AuthToken to AuthorizationService.";
-                        return GK_ERROR;
-                    }
-                }
                 sp<IServiceManager> sm = defaultServiceManager();
-
                 sp<IBinder> binder = sm->getService(String16("android.security.keystore"));
                 sp<security::keystore::IKeystoreService> service =
                         interface_cast<security::keystore::IKeystoreService>(binder);
@@ -338,12 +310,9 @@
                     if (!binder_result.isOk() ||
                         !keystore::KeyStoreServiceReturnCode(result).isOk()) {
                         LOG(ERROR) << "Failure sending auth token to KeyStore: " << result;
-                        return GK_ERROR;
                     }
                 } else {
-                    LOG(ERROR) << "Cannot deliver auth token. Unable to communicate with "
-                                  "Keystore.";
-                    return GK_ERROR;
+                    LOG(ERROR) << "Cannot deliver auth token. Unable to communicate with Keystore.";
                 }
             }
 
@@ -397,23 +366,23 @@
         }
 
         if (hw_device == NULL) {
-            const char* result = "Device not available";
+            const char *result = "Device not available";
             write(fd, result, strlen(result) + 1);
         } else {
-            const char* result = "OK";
+            const char *result = "OK";
             write(fd, result, strlen(result) + 1);
         }
 
         return OK;
     }
 
-  private:
+private:
     sp<IGatekeeper> hw_device;
 
     bool clear_state_if_needed_done;
     bool is_running_gsi;
 };
-}  // namespace android
+}// namespace android
 
 int main(int argc, char* argv[]) {
     ALOGI("Starting gatekeeperd...");