/*
 * Copyright (C) 2016 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.gatekeeper@1.0;

/**
 * Gatekeeper response codes; success >= 0; error < 0
 */
enum GatekeeperStatusCode : int32_t {
  STATUS_REENROLL       =  1,  // success, but upper layers should re-enroll
                               // the verified password due to a version change
  STATUS_OK             =  0,  // operation is successful
  ERROR_GENERAL_FAILURE = -1,  // operation failed
  ERROR_RETRY_TIMEOUT   = -2,  // operation should be retried after timeout
  ERROR_NOT_IMPLEMENTED = -3,  // operation is not implemented
};

/**
 * Gatekeeper response to any/all requests has this structure as mandatory part
 */
struct GatekeeperResponse {
    /** request completion status */
    GatekeeperStatusCode code;
    /**
     * retry timeout in ms, if code == ERROR_RETRY_TIMEOUT
     * otherwise unused (0)
     */
    uint32_t timeout;
    /** optional crypto blob. Opaque to Android system. */
    vec<uint8_t> data;
};