| /* |
| * 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.config.keys.impl; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.security.GeneralSecurityException; |
| import java.security.KeyFactory; |
| import java.security.KeyPair; |
| import java.security.KeyPairGenerator; |
| import java.security.PrivateKey; |
| import java.security.spec.InvalidKeySpecException; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import net.i2p.crypto.eddsa.EdDSAPublicKey; |
| import org.apache.sshd.common.config.keys.KeyEntryResolver; |
| import org.apache.sshd.common.config.keys.u2f.SkED25519PublicKey; |
| import org.apache.sshd.common.keyprovider.KeyPairProvider; |
| import org.apache.sshd.common.session.SessionContext; |
| import org.apache.sshd.common.util.security.eddsa.Ed25519PublicKeyDecoder; |
| |
| /** |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public class SkED25519PublicKeyEntryDecoder extends AbstractPublicKeyEntryDecoder<SkED25519PublicKey, PrivateKey> { |
| public static final String KEY_TYPE = "sk-ssh-ed25519@openssh.com"; |
| public static final int MAX_APP_NAME_LENGTH = 1024; |
| |
| public static final SkED25519PublicKeyEntryDecoder INSTANCE = new SkED25519PublicKeyEntryDecoder(); |
| |
| private static final String NO_TOUCH_REQUIRED_HEADER = "no-touch-required"; |
| |
| public SkED25519PublicKeyEntryDecoder() { |
| super(SkED25519PublicKey.class, PrivateKey.class, Collections.singleton(KEY_TYPE)); |
| } |
| |
| @Override |
| public SkED25519PublicKey decodePublicKey( |
| SessionContext session, String keyType, InputStream keyData, Map<String, String> headers) |
| throws IOException, GeneralSecurityException { |
| if (!KEY_TYPE.equals(keyType)) { |
| throw new InvalidKeySpecException("Invalid keyType: " + keyType); |
| } |
| |
| boolean noTouchRequired = parseBooleanHeader(headers, NO_TOUCH_REQUIRED_HEADER, false); |
| EdDSAPublicKey edDSAPublicKey |
| = Ed25519PublicKeyDecoder.INSTANCE.decodePublicKey(session, KeyPairProvider.SSH_ED25519, keyData, headers); |
| String appName = KeyEntryResolver.decodeString(keyData, MAX_APP_NAME_LENGTH); |
| return new SkED25519PublicKey(appName, noTouchRequired, edDSAPublicKey); |
| } |
| |
| @Override |
| public SkED25519PublicKey clonePublicKey(SkED25519PublicKey key) { |
| if (key == null) { |
| return null; |
| } |
| |
| return new SkED25519PublicKey(key.getAppName(), key.isNoTouchRequired(), key.getDelegatePublicKey()); |
| } |
| |
| @Override |
| public String encodePublicKey(OutputStream s, SkED25519PublicKey key) throws IOException { |
| Objects.requireNonNull(key, "No public key provided"); |
| KeyEntryResolver.encodeString(s, KEY_TYPE); |
| byte[] seed = Ed25519PublicKeyDecoder.getSeedValue(key.getDelegatePublicKey()); |
| KeyEntryResolver.writeRLEBytes(s, seed); |
| KeyEntryResolver.encodeString(s, key.getAppName()); |
| return KEY_TYPE; |
| } |
| |
| @Override |
| public PrivateKey clonePrivateKey(PrivateKey key) { |
| throw new UnsupportedOperationException("Private key operations are not supported for security keys."); |
| } |
| |
| @Override |
| public KeyFactory getKeyFactoryInstance() { |
| throw new UnsupportedOperationException("Private key operations are not supported for security keys."); |
| } |
| |
| @Override |
| public KeyPair generateKeyPair(int keySize) { |
| throw new UnsupportedOperationException("Private key operations are not supported for security keys."); |
| } |
| |
| @Override |
| public KeyPairGenerator getKeyPairGenerator() { |
| throw new UnsupportedOperationException("Private key operations are not supported for security keys."); |
| } |
| } |