[
https://issues.apache.org/jira/browse/SSHD-506?focusedWorklogId=436275&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-436275
]
ASF GitHub Bot logged work on SSHD-506:
---------------------------------------
Author: ASF GitHub Bot
Created on: 21/May/20 23:30
Start Date: 21/May/20 23:30
Worklog Time Spent: 10m
Work Description: jvz commented on a change in pull request #132:
URL: https://github.com/apache/mina-sshd/pull/132#discussion_r428968052
##########
File path:
sshd-common/src/main/java/org/apache/sshd/common/cipher/BaseAEADCipher.java
##########
@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sshd.common.cipher;
+
+import org.apache.sshd.common.util.security.SecurityUtils;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.spec.AlgorithmParameterSpec;
+
+public abstract class BaseAEADCipher extends BaseCipher {
+
+ private Mode mode;
+ private SecretKey secretKey;
+ private AlgorithmParameterSpec params;
+ private boolean aadWritten;
+
+ public BaseAEADCipher(
+ int ivsize, int authSize, int kdfSize, String algorithm, int
keySize, String transformation, int blkSize) {
+ super(ivsize, authSize, kdfSize, algorithm, keySize, transformation,
blkSize);
+ }
+
+ @Override
+ protected byte[] initializeIVData(final Mode mode, final byte[] iv, final
int reqLen) {
+ byte[] data = super.initializeIVData(mode, iv, reqLen);
+ params = initializeAlgorithmParameters(data);
+ return data;
+ }
+
+ @Override
+ protected byte[] initializeKeyData(final Mode mode, final byte[] key,
final int reqLen) {
+ byte[] keyData = super.initializeKeyData(mode, key, reqLen);
+ secretKey = new SecretKeySpec(keyData, getAlgorithm());
+ return keyData;
+ }
+
+ @Override
+ protected Cipher createCipherInstance(final Mode mode, final byte[] key,
final byte[] iv) throws Exception {
+ this.mode = mode;
+ Cipher instance = SecurityUtils.getCipher(getTransformation());
+ init(instance);
+ return instance;
+ }
+
+ private void init(Cipher cipher) throws InvalidKeyException,
InvalidAlgorithmParameterException {
Review comment:
Seems I was a little off. The default ciphers in OpenSSH right now are
`chacha20-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com`
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Issue Time Tracking
-------------------
Worklog Id: (was: 436275)
Time Spent: 1h 40m (was: 1.5h)
> Add support for aes128/256-gcm ciphers
> --------------------------------------
>
> Key: SSHD-506
> URL: https://issues.apache.org/jira/browse/SSHD-506
> Project: MINA SSHD
> Issue Type: Improvement
> Reporter: Lyor Goldstein
> Priority: Major
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> See:
> * [rfc5647|https://tools.ietf.org/html/rfc5647]
> *
> [draft-igoe-secsh-aes-gcm-01|https://tools.ietf.org/html/draft-igoe-secsh-aes-gcm-01]
> * [OpenSSH v6.2|http://www.openssh.com/txt/release-6.2]
> * [JAVA AES 256 GCM encrypt/decrypt
> example|https://javainterviewpoint.com/java-aes-256-gcm-encryption-and-decryption/]
> - especially the usage of {{GCMParameterSpec}} to initialize the cipher
> * [OpenJDK 8 AESCipher.java source
> code|https://github.com/frohoff/jdk8u-dev-jdk/blob/master/src/share/classes/com/sun/crypto/provider/AESCipher.java]
> ** See also
> [CipherCore.java|https://github.com/frohoff/jdk8u-dev-jdk/blob/master/src/share/classes/com/sun/crypto/provider/CipherCore.java],
>
> [FeedbackCipher.java|https://github.com/frohoff/jdk8u-dev-jdk/blob/master/src/share/classes/com/sun/crypto/provider/FeedbackCipher.java],
>
> [GaloisCounterMode.java|https://github.com/frohoff/jdk8u-dev-jdk/blob/master/src/share/classes/com/sun/crypto/provider/GaloisCounterMode.java]
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