54 lines
1.8 KiB
Java
54 lines
1.8 KiB
Java
/**
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*
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* Copyright 2018 Paul Schaub
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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.jivesoftware.smackx.omemo.exceptions;
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import org.jivesoftware.smackx.omemo.OmemoConfiguration;
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import org.jivesoftware.smackx.omemo.internal.OmemoDevice;
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/**
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* Exception that signals, that a device is considered read-only.
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* Read-only devices are devices that receive OMEMO messages, but do not send any.
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* Those devices are weakening forward secrecy. For that reason, read-only devices are ignored after n messages have
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* been sent without getting a reply back.
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*/
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public class ReadOnlyDeviceException extends Exception {
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private static final long serialVersionUID = 1L;
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private final OmemoDevice device;
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/**
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* Constructor.
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* We do not need to hand over the current value of the message counter, as that value will always be equal to
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* {@link OmemoConfiguration#getMaxReadOnlyMessageCount()}. Therefore providing the {@link OmemoDevice} should be
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* enough.
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*
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* @param device device which is considered read-only.
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*/
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public ReadOnlyDeviceException(OmemoDevice device) {
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this.device = device;
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}
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/**
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* Return the device in question.
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*
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* @return device that is read-only.
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*/
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public OmemoDevice getDevice() {
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return device;
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}
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}
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