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org.apache.sshd.common.util.security.bouncycastle.BouncyCastleKeyPairResourceParser Maven / Gradle / Ivy
/*
* 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.util.security.bouncycastle;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ProtocolException;
import java.nio.charset.StandardCharsets;
import java.security.GeneralSecurityException;
import java.security.KeyPair;
import java.security.NoSuchProviderException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import javax.security.auth.login.CredentialException;
import javax.security.auth.login.FailedLoginException;
import org.apache.sshd.common.NamedResource;
import org.apache.sshd.common.config.keys.FilePasswordProvider;
import org.apache.sshd.common.config.keys.FilePasswordProvider.ResourceDecodeResult;
import org.apache.sshd.common.config.keys.loader.AbstractKeyPairResourceParser;
import org.apache.sshd.common.session.SessionContext;
import org.apache.sshd.common.util.GenericUtils;
import org.apache.sshd.common.util.io.IoUtils;
import org.apache.sshd.common.util.security.SecurityProviderRegistrar;
import org.apache.sshd.common.util.security.SecurityUtils;
import org.bouncycastle.openssl.PEMDecryptorProvider;
import org.bouncycastle.openssl.PEMEncryptedKeyPair;
import org.bouncycastle.openssl.PEMKeyPair;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
import org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder;
/**
* @author Apache MINA SSHD Project
*/
public class BouncyCastleKeyPairResourceParser extends AbstractKeyPairResourceParser {
public static final List BEGINNERS = Collections.unmodifiableList(
Arrays.asList(
"BEGIN RSA PRIVATE KEY",
"BEGIN DSA PRIVATE KEY",
"BEGIN EC PRIVATE KEY"));
public static final List ENDERS = Collections.unmodifiableList(
Arrays.asList(
"END RSA PRIVATE KEY",
"END DSA PRIVATE KEY",
"END EC PRIVATE KEY"));
public static final BouncyCastleKeyPairResourceParser INSTANCE = new BouncyCastleKeyPairResourceParser();
public BouncyCastleKeyPairResourceParser() {
super(BEGINNERS, ENDERS);
}
@Override
public Collection extractKeyPairs(
SessionContext session, NamedResource resourceKey,
String beginMarker, String endMarker,
FilePasswordProvider passwordProvider,
List lines, Map headers)
throws IOException, GeneralSecurityException {
StringBuilder writer = new StringBuilder(beginMarker.length() + endMarker.length() + lines.size() * 80);
writer.append(beginMarker).append(IoUtils.EOL);
lines.forEach(l -> writer.append(l).append(IoUtils.EOL));
writer.append(endMarker).append(IoUtils.EOL);
String data = writer.toString();
byte[] dataBytes = data.getBytes(StandardCharsets.UTF_8);
try (InputStream bais = new ByteArrayInputStream(dataBytes)) {
return extractKeyPairs(session, resourceKey, beginMarker, endMarker, passwordProvider, bais, headers);
}
}
@Override
public Collection extractKeyPairs(
SessionContext session, NamedResource resourceKey,
String beginMarker, String endMarker,
FilePasswordProvider passwordProvider,
InputStream stream, Map headers)
throws IOException, GeneralSecurityException {
KeyPair kp = loadKeyPair(session, resourceKey, stream, passwordProvider);
return (kp == null) ? Collections.emptyList() : Collections.singletonList(kp);
}
public static KeyPair loadKeyPair(
SessionContext session, NamedResource resourceKey, InputStream inputStream, FilePasswordProvider provider)
throws IOException, GeneralSecurityException {
try (PEMParser r = new PEMParser(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {
Object o = r.readObject();
SecurityProviderRegistrar registrar = SecurityUtils.getRegisteredProvider(SecurityUtils.BOUNCY_CASTLE);
if (registrar == null) {
throw new NoSuchProviderException(SecurityUtils.BOUNCY_CASTLE + " registrar not available");
}
JcaPEMKeyConverter pemConverter = new JcaPEMKeyConverter();
if (registrar.isNamedProviderUsed()) {
pemConverter.setProvider(registrar.getName());
} else {
pemConverter.setProvider(registrar.getSecurityProvider());
}
if (o instanceof PEMEncryptedKeyPair) {
if (provider == null) {
throw new CredentialException("Missing password provider for encrypted resource=" + resourceKey);
}
for (int retryIndex = 0;; retryIndex++) {
String password = provider.getPassword(session, resourceKey, retryIndex);
PEMKeyPair decoded;
try {
if (GenericUtils.isEmpty(password)) {
throw new FailedLoginException("No password data for encrypted resource=" + resourceKey);
}
JcePEMDecryptorProviderBuilder decryptorBuilder = new JcePEMDecryptorProviderBuilder();
PEMDecryptorProvider pemDecryptor = decryptorBuilder.build(password.toCharArray());
decoded = ((PEMEncryptedKeyPair) o).decryptKeyPair(pemDecryptor);
} catch (IOException | GeneralSecurityException | RuntimeException e) {
ResourceDecodeResult result
= provider.handleDecodeAttemptResult(session, resourceKey, retryIndex, password, e);
if (result == null) {
result = ResourceDecodeResult.TERMINATE;
}
switch (result) {
case TERMINATE:
throw e;
case RETRY:
continue;
case IGNORE:
return null;
default:
throw new ProtocolException(
"Unsupported decode attempt result (" + result + ") for " + resourceKey);
}
}
o = decoded;
provider.handleDecodeAttemptResult(session, resourceKey, retryIndex, password, null);
break;
}
}
if (o instanceof PEMKeyPair) {
return pemConverter.getKeyPair((PEMKeyPair) o);
} else if (o instanceof KeyPair) {
return (KeyPair) o;
} else {
throw new IOException("Failed to read " + resourceKey + " - unknown result object: " + o);
}
}
}
}