/*
 * Copyright (C) 2015 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.security.keystore;

/**
 * Cryptographic operation backed by Android KeyStore.
 *
 * @hide
 */
public interface KeyStoreCryptoOperation {
    /**
     * Gets the Android KeyStore operation handle of this crypto operation.
     *
     * @return handle or {@code 0} if the Android KeyStore operation is not in progress.
     */
    long getOperationHandle();
}