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Access to the Neo4j graph database through Java
/*
* Copyright 2022 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.handler.ssl;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.AccessController;
import java.security.PrivateKey;
import java.security.PrivilegedAction;
import java.security.Provider;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
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.JceOpenSSLPKCS8DecryptorProviderBuilder;
import org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder;
import org.bouncycastle.operator.InputDecryptorProvider;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.pkcs.PKCS8EncryptedPrivateKeyInfo;
import org.bouncycastle.pkcs.PKCSException;
final class BouncyCastlePemReader {
private static Throwable UNAVAILABILITY_CAUSE;
private static final InternalLogger logger = InternalLoggerFactory.getInstance(BouncyCastlePemReader.class);
private static Provider bcProvider;
private static Boolean attemptedLoading = false;
public static boolean hasAttemptedLoading() {
return attemptedLoading;
}
public static boolean isAvailable() {
if (!hasAttemptedLoading()) {
tryLoading();
}
return UNAVAILABILITY_CAUSE == null;
}
/**
* @return the cause if unavailable. {@code null} if available.
*/
public static Throwable unavailabilityCause() {
return UNAVAILABILITY_CAUSE;
}
private static void tryLoading() {
AccessController.doPrivileged(new PrivilegedAction() {
@Override
public Void run() {
try {
Class bcProviderClass
= (Class) Class.forName("org.bouncycastle.jce.provider.BouncyCastleProvider",
true, this.getClass().getClassLoader());
bcProvider = bcProviderClass.getConstructor().newInstance();
logger.debug("Bouncy Castle provider available");
attemptedLoading = true;
} catch (Throwable e) {
logger.debug("Cannot load Bouncy Castle provider", e);
UNAVAILABILITY_CAUSE = e;
attemptedLoading = true;
} finally {
return null;
}
}
});
}
/**
* Generates a new {@link PrivateKey}.
*
* @param keyInputStream an input stream for a PKCS#1 or PKCS#8 private key in PEM format.
* @param keyPassword the password of the {@code keyFile}.
* {@code null} if it's not password-protected.
* @return generated {@link PrivateKey}.
*/
public static PrivateKey getPrivateKey(InputStream keyInputStream, String keyPassword) {
if (!isAvailable()) {
if (logger.isDebugEnabled()) {
logger.debug("Bouncy castle provider is unavailable.", unavailabilityCause());
}
return null;
}
try {
PEMParser parser = newParser(keyInputStream);
return getPrivateKey(parser, keyPassword);
} catch (Exception e) {
logger.debug("Unable to extract private key", e);
return null;
}
}
/**
* Generates a new {@link PrivateKey}.
*
* @param keyFile a PKCS#1 or PKCS#8 private key file in PEM format.
* @param keyPassword the password of the {@code keyFile}.
* {@code null} if it's not password-protected.
* @return generated {@link PrivateKey}.
*/
public static PrivateKey getPrivateKey(File keyFile, String keyPassword) {
if (!isAvailable()) {
if (logger.isDebugEnabled()) {
logger.debug("Bouncy castle provider is unavailable.", unavailabilityCause());
}
return null;
}
try {
PEMParser parser = newParser(keyFile);
return getPrivateKey(parser, keyPassword);
} catch (Exception e) {
logger.debug("Unable to extract private key", e);
return null;
}
}
private static JcaPEMKeyConverter newConverter() {
return new JcaPEMKeyConverter().setProvider(bcProvider);
}
private static PrivateKey getPrivateKey(PEMParser pemParser, String keyPassword) throws IOException,
PKCSException, OperatorCreationException {
try {
Object object = pemParser.readObject();
if (logger.isDebugEnabled()) {
logger.debug("Parsed PEM object of type {} and assume " +
"key is {}encrypted", object.getClass().getName(), keyPassword == null ? "not " : "");
}
JcaPEMKeyConverter converter = newConverter();
PrivateKey pk = null;
if (keyPassword == null) {
// assume private key is not encrypted
if (object instanceof PrivateKeyInfo) {
pk = converter.getPrivateKey((PrivateKeyInfo) object);
} else if (object instanceof PEMKeyPair) {
pk = converter.getKeyPair((PEMKeyPair) object).getPrivate();
} else {
logger.debug("Unable to handle PEM object of type {} as a non encrypted key", object.getClass());
}
} else {
// assume private key is encrypted
if (object instanceof PEMEncryptedKeyPair) {
PEMDecryptorProvider decProv = new JcePEMDecryptorProviderBuilder()
.setProvider(bcProvider)
.build(keyPassword.toCharArray());
pk = converter.getKeyPair(((PEMEncryptedKeyPair) object).decryptKeyPair(decProv)).getPrivate();
} else if (object instanceof PKCS8EncryptedPrivateKeyInfo) {
InputDecryptorProvider pkcs8InputDecryptorProvider = new JceOpenSSLPKCS8DecryptorProviderBuilder()
.setProvider(bcProvider)
.build(keyPassword.toCharArray());
pk = converter.getPrivateKey(((PKCS8EncryptedPrivateKeyInfo) object)
.decryptPrivateKeyInfo(pkcs8InputDecryptorProvider));
} else {
logger.debug("Unable to handle PEM object of type {} as a encrypted key", object.getClass());
}
}
if (pk == null) {
if (logger.isDebugEnabled()) {
logger.debug("No key found");
}
}
return pk;
} finally {
if (pemParser != null) {
try {
pemParser.close();
} catch (Exception ignore) {
logger.debug("Failed closing pem parser", ignore);
}
}
}
}
private static PEMParser newParser(File keyFile) throws FileNotFoundException {
return new PEMParser(new FileReader(keyFile));
}
private static PEMParser newParser(InputStream keyInputStream) {
return new PEMParser(new InputStreamReader(keyInputStream, CharsetUtil.US_ASCII));
}
private BouncyCastlePemReader() { }
}