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https://github.com/vanitasvitae/Smack.git
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4133eb175c
Introducing Smack's own XmlPullParser interface which tries to stay as compatible as possible to XPP3. The interface is used to either wrap StAX's XMLStreamReader if Smack is used on Java SE, and XPP3's XmlPullParser if Smack is used on on Android. Fixes SMACK-591. Also introduce JUnit 5 and non-strict javadoc projects.
90 lines
2.6 KiB
Java
90 lines
2.6 KiB
Java
/**
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*
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* Copyright 2017 Paul Schaub, 2019 Florian Schmaus
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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.internal;
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import static org.jivesoftware.smackx.omemo.util.OmemoConstants.Crypto.CIPHERMODE;
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import static org.jivesoftware.smackx.omemo.util.OmemoConstants.Crypto.KEYTYPE;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.NoSuchAlgorithmException;
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import javax.crypto.Cipher;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import org.jivesoftware.smackx.omemo.exceptions.CryptoFailedException;
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/**
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* Encapsulate Cipher and AuthTag.
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*
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* @author Paul Schaub
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*/
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public class CipherAndAuthTag {
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private final byte[] key, iv, authTag;
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private final boolean wasPreKey;
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public CipherAndAuthTag(byte[] key, byte[] iv, byte[] authTag, boolean wasPreKey) {
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this.authTag = authTag;
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this.key = key;
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this.iv = iv;
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this.wasPreKey = wasPreKey;
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}
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public Cipher getCipher() throws CryptoFailedException {
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Cipher cipher;
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try {
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cipher = Cipher.getInstance(CIPHERMODE);
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SecretKeySpec keySpec = new SecretKeySpec(key, KEYTYPE);
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IvParameterSpec ivSpec = new IvParameterSpec(iv);
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cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
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} catch (NoSuchAlgorithmException | java.security.InvalidKeyException |
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InvalidAlgorithmParameterException |
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NoSuchPaddingException e) {
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throw new CryptoFailedException(e);
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}
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return cipher;
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}
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public byte[] getAuthTag() {
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if (authTag != null) {
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return authTag.clone();
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}
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return null;
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}
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public byte[] getKey() {
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if (key != null) {
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return key.clone();
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}
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return null;
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}
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public byte[] getIv() {
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if (iv != null) {
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return iv.clone();
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}
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return null;
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}
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public boolean wasPreKeyEncrypted() {
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return wasPreKey;
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}
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}
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