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/*
* 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 com.android.apkzlib.sign.v2;
/**
* APK Signature Scheme v2 content digest algorithm.
*/
enum ContentDigestAlgorithm {
/** SHA2-256 over 1 MB chunks. */
CHUNKED_SHA256("SHA-256", 256 / 8),
/** SHA2-512 over 1 MB chunks. */
CHUNKED_SHA512("SHA-512", 512 / 8);
private final String mJcaMessageDigestAlgorithmName;
private final int mChunkDigestOutputSizeBytes;
private ContentDigestAlgorithm(
String jcaMessageDigestAlgorithmName, int chunkDigestOutputSizeBytes) {
mJcaMessageDigestAlgorithmName = jcaMessageDigestAlgorithmName;
mChunkDigestOutputSizeBytes = chunkDigestOutputSizeBytes;
}
/**
* Returns the {@link java.security.MessageDigest} algorithm used for computing digests of
* chunks by this content digest algorithm.
*/
String getJcaMessageDigestAlgorithmName() {
return mJcaMessageDigestAlgorithmName;
}
/**
* Returns the size (in bytes) of the digest of a chunk of content.
*/
int getChunkDigestOutputSizeBytes() {
return mChunkDigestOutputSizeBytes;
}
}
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