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https://github.com/oxen-io/session-android.git
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0ace469d74
1) In addition to the Recipient interface, there is now RecipientDevice. A Recipient can have multiple corresponding RecipientDevices. All addressing is done to a Recipient, but crypto sessions and transport delivery are done to RecipientDevice. 2) The Push transport handles the discovery and session setup of additional Recipient devices. 3) Some internal rejiggering of Groups.
47 lines
1.9 KiB
Java
47 lines
1.9 KiB
Java
/**
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* Copyright (C) 2013 Open Whisper Systems
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.whispersystems.textsecure.crypto;
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import android.content.Context;
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import org.whispersystems.textsecure.crypto.protocol.CiphertextMessage;
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import org.whispersystems.textsecure.storage.RecipientDevice;
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import org.whispersystems.textsecure.storage.SessionRecordV1;
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import org.whispersystems.textsecure.storage.SessionRecordV2;
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public abstract class SessionCipher {
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protected static final Object SESSION_LOCK = new Object();
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public abstract CiphertextMessage encrypt(byte[] paddedMessage);
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public abstract byte[] decrypt(byte[] decodedMessage) throws InvalidMessageException;
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public static SessionCipher createFor(Context context,
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MasterSecret masterSecret,
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RecipientDevice recipient)
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{
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if (SessionRecordV2.hasSession(context, masterSecret, recipient)) {
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return new SessionCipherV2(context, masterSecret, recipient);
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} else if (SessionRecordV1.hasSession(context, recipient.getRecipientId())) {
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return new SessionCipherV1(context, masterSecret, recipient.getRecipient());
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} else {
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throw new AssertionError("Attempt to initialize cipher for non-existing session.");
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}
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}
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} |