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/*
* Copyright (C) 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 com.android.server.backup.encryption.chunking;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
/** Splits an input stream into chunks, which are to be encrypted separately. */
public interface Chunker {
/**
* Splits the input stream into chunks.
*
* @param inputStream The input stream.
* @param chunkConsumer A function that processes each chunk as it is produced.
* @throws IOException If there is a problem reading the input stream.
* @throws GeneralSecurityException if the consumer function throws an error.
*/
void chunkify(InputStream inputStream, ChunkConsumer chunkConsumer)
throws IOException, GeneralSecurityException;
/** Function that consumes chunks. */
interface ChunkConsumer {
/**
* Invoked for each chunk.
*
* @param chunk Plaintext bytes of chunk.
* @throws GeneralSecurityException if there is an issue encrypting the chunk.
*/
void accept(byte[] chunk) throws GeneralSecurityException;
}
}
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