9087d19fc0
If it doesn't match, mark it broken. It means the dictionary pack will try to install it again next time it updates. We may want to rethink this. Bug: 13125743 Change-Id: I0eb547aa7066bed8cb00c009debbafe9181c37ad
46 lines
1.7 KiB
Java
46 lines
1.7 KiB
Java
/**
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.android.inputmethod.dictionarypack;
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import java.io.InputStream;
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import java.io.IOException;
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import java.security.MessageDigest;
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public final class MD5Calculator {
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private MD5Calculator() {} // This helper class is not instantiable
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public static String checksum(final InputStream in) throws IOException {
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// This code from the Android documentation for MessageDigest. Nearly verbatim.
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MessageDigest digester;
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try {
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digester = MessageDigest.getInstance("MD5");
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} catch (java.security.NoSuchAlgorithmException e) {
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return null; // Platform does not support MD5 : can't check, so return null
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}
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final byte[] bytes = new byte[8192];
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int byteCount;
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while ((byteCount = in.read(bytes)) > 0) {
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digester.update(bytes, 0, byteCount);
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}
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final byte[] digest = digester.digest();
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final StringBuilder s = new StringBuilder();
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for (int i = 0; i < digest.length; ++i) {
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s.append(String.format("%1$02x", digest[i]));
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}
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return s.toString();
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}
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}
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