94 lines
3.3 KiB
Java
94 lines
3.3 KiB
Java
/**
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*
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* Copyright 2017 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.internal.OmemoDevice;
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import org.jivesoftware.smackx.omemo.trust.OmemoFingerprint;
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/**
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* Exception that gets thrown when we try to en-/decrypt a message for an untrusted contact.
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* This might either be because the user actively untrusted a device, or we receive a message from a contact
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* which contains an identityKey that differs from the one the user trusted.
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*/
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public class UntrustedOmemoIdentityException extends Exception {
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private static final long serialVersionUID = 1L;
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private final OmemoDevice device;
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private final OmemoFingerprint trustedKey, untrustedKey;
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/**
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* Constructor for when we receive a message with an identityKey different from the one we trusted.
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*
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* @param device device which sent the message.
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* @param fpTrusted fingerprint of the identityKey we previously had and trusted.
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* @param fpUntrusted fingerprint of the new key which is untrusted.
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*/
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public UntrustedOmemoIdentityException(OmemoDevice device, OmemoFingerprint fpTrusted, OmemoFingerprint fpUntrusted) {
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super();
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this.device = device;
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this.trustedKey = fpTrusted;
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this.untrustedKey = fpUntrusted;
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}
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/**
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* Constructor for when encryption fails because the user untrusted a recipients device.
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*
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* @param device device the user wants to encrypt for, but which has been marked as untrusted.
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* @param untrustedKey fingerprint of that device.
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*/
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public UntrustedOmemoIdentityException(OmemoDevice device, OmemoFingerprint untrustedKey) {
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this(device, null, untrustedKey);
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}
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/**
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* Return the device which sent the message.
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* @return omemoDevice.
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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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* Return the fingerprint of the key we expected.
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* This might return null in case this exception got thrown during encryption process.
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* @return
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*/
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public OmemoFingerprint getTrustedFingerprint() {
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return trustedKey;
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}
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/**
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* Return the fingerprint of the unexpected untrusted key.
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* @return
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*/
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public OmemoFingerprint getUntrustedFingerprint() {
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return untrustedKey;
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}
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@Override
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public String getMessage() {
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if (trustedKey != null) {
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return "Untrusted OMEMO Identity encountered:\n" +
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"Fingerprint of trusted key:\n" + trustedKey.blocksOf8Chars() + "\n" +
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"Fingerprint of untrusted key:\n" + untrustedKey.blocksOf8Chars();
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} else {
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return "Untrusted OMEMO Identity encountered:\n" +
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"Fingerprint of untrusted key:\n" + untrustedKey.blocksOf8Chars();
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}
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}
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}
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