mirror of https://git.matrix.org/git/olm.git
84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
/*
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* Copyright 2016 OpenMarket Ltd
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* Copyright 2016 Vector Creations Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.matrix.olm;
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import android.util.Log;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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/**
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* Helper class dedicated to serialization mechanism (template method pattern).
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*/
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abstract class CommonSerializeUtils {
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private static final String LOG_TAG = "CommonSerializeUtils";
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/**
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* Kick off the serialization mechanism.
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* @param aOutStream output stream for serializing
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* @throws IOException exception
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*/
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protected void serialize(ObjectOutputStream aOutStream) throws IOException {
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aOutStream.defaultWriteObject();
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// generate serialization key
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byte[] key = OlmUtility.getRandomKey();
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// compute pickle string
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StringBuffer errorMsg = new StringBuffer();
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byte[] pickledData = serialize(key, errorMsg);
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if(null == pickledData) {
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throw new OlmException(OlmException.EXCEPTION_CODE_ACCOUNT_SERIALIZATION, String.valueOf(errorMsg));
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} else {
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aOutStream.writeObject(new String(key, "UTF-8"));
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aOutStream.writeObject(new String(pickledData, "UTF-8"));
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}
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}
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/**
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* Kick off the deserialization mechanism.
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* @param aInStream input stream
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* @throws Exception the exception
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*/
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protected void deserialize(ObjectInputStream aInStream) throws Exception {
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aInStream.defaultReadObject();
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String keyAsString = (String)aInStream.readObject();
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String pickledDataAsString = (String)aInStream.readObject();
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byte[] key;
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byte[] pickledData;
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try {
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key = keyAsString.getBytes("UTF-8");
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pickledData = pickledDataAsString.getBytes("UTF-8");
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deserialize(pickledData, key);
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} catch (Exception e) {
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throw new OlmException(OlmException.EXCEPTION_CODE_ACCOUNT_DESERIALIZATION, e.getMessage());
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}
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Log.d(LOG_TAG,"## deserializeObject(): success");
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}
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protected abstract byte[] serialize(byte[] aKey, StringBuffer aErrorMsg);
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protected abstract void deserialize(byte[] aSerializedData, byte[] aKey) throws Exception;
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}
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