| /* |
| * 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.math.BigInteger; |
| import java.security.GeneralSecurityException; |
| import java.security.InvalidKeyException; |
| import java.security.KeyFactory; |
| import java.security.KeyPairGenerator; |
| import java.security.interfaces.RSAPrivateCrtKey; |
| import java.security.interfaces.RSAPrivateKey; |
| import java.security.interfaces.RSAPublicKey; |
| import java.security.spec.InvalidKeySpecException; |
| import java.security.spec.RSAPrivateCrtKeySpec; |
| import java.security.spec.RSAPublicKeySpec; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import org.apache.sshd.common.config.keys.KeyEntryResolver; |
| import org.apache.sshd.common.config.keys.KeyUtils; |
| import org.apache.sshd.common.keyprovider.KeyPairProvider; |
| import org.apache.sshd.common.session.SessionContext; |
| import org.apache.sshd.common.util.security.SecurityUtils; |
| |
| /** |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public class RSAPublicKeyDecoder extends AbstractPublicKeyEntryDecoder<RSAPublicKey, RSAPrivateKey> { |
| public static final RSAPublicKeyDecoder INSTANCE = new RSAPublicKeyDecoder(); |
| |
| public RSAPublicKeyDecoder() { |
| super(RSAPublicKey.class, RSAPrivateKey.class, |
| Collections.unmodifiableList( |
| Arrays.asList(KeyPairProvider.SSH_RSA, |
| // Not really required, but allow it |
| KeyUtils.RSA_SHA256_KEY_TYPE_ALIAS, |
| KeyUtils.RSA_SHA512_KEY_TYPE_ALIAS))); |
| } |
| |
| @Override |
| public RSAPublicKey decodePublicKey( |
| SessionContext session, String keyType, InputStream keyData, Map<String, String> headers) |
| throws IOException, GeneralSecurityException { |
| // Not really required, but allow it |
| String canonicalName = KeyUtils.getCanonicalKeyType(keyType); |
| if (!KeyPairProvider.SSH_RSA.equals(canonicalName)) { // just in case we were invoked directly |
| throw new InvalidKeySpecException("Unexpected key type: " + keyType); |
| } |
| |
| BigInteger e = KeyEntryResolver.decodeBigInt(keyData); |
| BigInteger n = KeyEntryResolver.decodeBigInt(keyData); |
| |
| return generatePublicKey(new RSAPublicKeySpec(n, e)); |
| } |
| |
| @Override |
| public String encodePublicKey(OutputStream s, RSAPublicKey key) throws IOException { |
| Objects.requireNonNull(key, "No public key provided"); |
| KeyEntryResolver.encodeString(s, KeyPairProvider.SSH_RSA); |
| KeyEntryResolver.encodeBigInt(s, key.getPublicExponent()); |
| KeyEntryResolver.encodeBigInt(s, key.getModulus()); |
| |
| return KeyPairProvider.SSH_RSA; |
| } |
| |
| @Override |
| public RSAPublicKey clonePublicKey(RSAPublicKey key) throws GeneralSecurityException { |
| if (key == null) { |
| return null; |
| } else { |
| return generatePublicKey(new RSAPublicKeySpec(key.getModulus(), key.getPublicExponent())); |
| } |
| } |
| |
| @Override |
| public RSAPrivateKey clonePrivateKey(RSAPrivateKey key) throws GeneralSecurityException { |
| if (key == null) { |
| return null; |
| } |
| |
| if (!(key instanceof RSAPrivateCrtKey)) { |
| throw new InvalidKeyException("Cannot clone a non-RSAPrivateCrtKey: " + key.getClass().getSimpleName()); |
| } |
| |
| RSAPrivateCrtKey rsaPrv = (RSAPrivateCrtKey) key; |
| return generatePrivateKey( |
| new RSAPrivateCrtKeySpec( |
| rsaPrv.getModulus(), |
| rsaPrv.getPublicExponent(), |
| rsaPrv.getPrivateExponent(), |
| rsaPrv.getPrimeP(), |
| rsaPrv.getPrimeQ(), |
| rsaPrv.getPrimeExponentP(), |
| rsaPrv.getPrimeExponentQ(), |
| rsaPrv.getCrtCoefficient())); |
| } |
| |
| @Override |
| public KeyPairGenerator getKeyPairGenerator() throws GeneralSecurityException { |
| return SecurityUtils.getKeyPairGenerator(KeyUtils.RSA_ALGORITHM); |
| } |
| |
| @Override |
| public KeyFactory getKeyFactoryInstance() throws GeneralSecurityException { |
| return SecurityUtils.getKeyFactory(KeyUtils.RSA_ALGORITHM); |
| } |
| } |