/
ExampleServer.java
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/
ExampleServer.java
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/*
* Copyright (c) 2022 the Eclipse Milo Authors
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.milo.examples.server;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.KeyPair;
import java.security.Security;
import java.security.cert.X509Certificate;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.eclipse.milo.opcua.sdk.server.EndpointConfig;
import org.eclipse.milo.opcua.sdk.server.OpcUaServer;
import org.eclipse.milo.opcua.sdk.server.OpcUaServerConfig;
import org.eclipse.milo.opcua.sdk.server.identity.CompositeValidator;
import org.eclipse.milo.opcua.sdk.server.identity.UsernameIdentityValidator;
import org.eclipse.milo.opcua.sdk.server.identity.X509IdentityValidator;
import org.eclipse.milo.opcua.sdk.server.util.HostnameUtil;
import org.eclipse.milo.opcua.stack.core.StatusCodes;
import org.eclipse.milo.opcua.stack.core.UaRuntimeException;
import org.eclipse.milo.opcua.stack.core.security.CertificateManager;
import org.eclipse.milo.opcua.stack.core.security.DefaultCertificateManager;
import org.eclipse.milo.opcua.stack.core.security.DefaultServerCertificateValidator;
import org.eclipse.milo.opcua.stack.core.security.DefaultTrustListManager;
import org.eclipse.milo.opcua.stack.core.security.SecurityPolicy;
import org.eclipse.milo.opcua.stack.core.transport.TransportProfile;
import org.eclipse.milo.opcua.stack.core.types.builtin.DateTime;
import org.eclipse.milo.opcua.stack.core.types.builtin.LocalizedText;
import org.eclipse.milo.opcua.stack.core.types.builtin.NodeId;
import org.eclipse.milo.opcua.stack.core.types.enumerated.MessageSecurityMode;
import org.eclipse.milo.opcua.stack.core.types.structured.BuildInfo;
import org.eclipse.milo.opcua.stack.core.util.CertificateUtil;
import org.eclipse.milo.opcua.stack.core.util.NonceUtil;
import org.eclipse.milo.opcua.stack.transport.server.tcp.OpcTcpServerTransport;
import org.eclipse.milo.opcua.stack.transport.server.tcp.OpcTcpServerTransportConfig;
import org.slf4j.LoggerFactory;
import static org.eclipse.milo.opcua.sdk.server.OpcUaServerConfig.USER_TOKEN_POLICY_ANONYMOUS;
import static org.eclipse.milo.opcua.sdk.server.OpcUaServerConfig.USER_TOKEN_POLICY_USERNAME;
import static org.eclipse.milo.opcua.sdk.server.OpcUaServerConfig.USER_TOKEN_POLICY_X509;
public class ExampleServer {
private static final int TCP_BIND_PORT = 12686;
static {
// Required for SecurityPolicy.Aes256_Sha256_RsaPss
Security.addProvider(new BouncyCastleProvider());
try {
NonceUtil.blockUntilSecureRandomSeeded(10, TimeUnit.SECONDS);
} catch (ExecutionException | InterruptedException | TimeoutException e) {
e.printStackTrace();
System.exit(-1);
}
}
public static void main(String[] args) throws Exception {
ExampleServer server = new ExampleServer();
server.startup().get();
final CompletableFuture<Void> future = new CompletableFuture<>();
Runtime.getRuntime().addShutdownHook(new Thread(() -> future.complete(null)));
future.get();
}
private final OpcUaServer server;
private final ExampleNamespace exampleNamespace;
public ExampleServer() throws Exception {
Path securityTempDir = Paths.get(System.getProperty("java.io.tmpdir"), "server", "security");
Files.createDirectories(securityTempDir);
if (!Files.exists(securityTempDir)) {
throw new Exception("unable to create security temp dir: " + securityTempDir);
}
File pkiDir = securityTempDir.resolve("pki").toFile();
LoggerFactory.getLogger(getClass())
.info("security dir: {}", securityTempDir.toAbsolutePath());
LoggerFactory.getLogger(getClass())
.info("security pki dir: {}", pkiDir.getAbsolutePath());
KeyStoreLoader loader = new KeyStoreLoader().load(securityTempDir);
var certificateManager = DefaultCertificateManager.createWithDefaultApplicationGroup(
pkiDir.toPath(),
new CertificateManager.CertificateFactory() {
@Override
public KeyPair createKeyPair(NodeId certificateTypeId) {
return loader.getServerKeyPair();
}
@Override
public X509Certificate[] createCertificateChain(NodeId certificateTypeId, KeyPair keyPair) {
return loader.getServerCertificateChain();
}
}
);
var trustListManager = new DefaultTrustListManager(pkiDir);
var certificateValidator = new DefaultServerCertificateValidator(trustListManager);
var identityValidator = new UsernameIdentityValidator(
true,
authChallenge -> {
String username = authChallenge.getUsername();
String password = authChallenge.getPassword();
boolean userOk = "user".equals(username) && "password1".equals(password);
boolean adminOk = "admin".equals(username) && "password2".equals(password);
return userOk || adminOk;
}
);
var x509IdentityValidator = new X509IdentityValidator(c -> true);
X509Certificate certificate = loader.getServerCertificate();
// The configured application URI must match the one in the certificate(s)
String applicationUri = CertificateUtil
.getSanUri(certificate)
.orElseThrow(
() -> new UaRuntimeException(
StatusCodes.Bad_ConfigurationError,
"certificate is missing the application URI"
)
);
Set<EndpointConfig> endpointConfigurations = createEndpointConfigs(certificate);
OpcUaServerConfig serverConfig = OpcUaServerConfig.builder()
.setApplicationUri(applicationUri)
.setApplicationName(LocalizedText.english("Eclipse Milo OPC UA Example Server"))
.setEndpoints(endpointConfigurations)
.setBuildInfo(
new BuildInfo(
"urn:eclipse:milo:example-server",
"eclipse",
"eclipse milo example server",
OpcUaServer.SDK_VERSION,
"", DateTime.now()))
.setCertificateManager(certificateManager)
.setTrustListManager(trustListManager)
.setCertificateValidator(certificateValidator)
.setIdentityValidator(new CompositeValidator(identityValidator, x509IdentityValidator))
.setProductUri("urn:eclipse:milo:example-server")
.build();
server = new OpcUaServer(serverConfig, transportProfile -> {
assert transportProfile == TransportProfile.TCP_UASC_UABINARY;
OpcTcpServerTransportConfig transportConfig =
OpcTcpServerTransportConfig.newBuilder().build();
return new OpcTcpServerTransport(transportConfig);
});
exampleNamespace = new ExampleNamespace(server);
exampleNamespace.startup();
}
private Set<EndpointConfig> createEndpointConfigs(X509Certificate certificate) {
var endpointConfigs = new LinkedHashSet<EndpointConfig>();
List<String> bindAddresses = List.of("0.0.0.0");
var hostnames = new LinkedHashSet<String>();
hostnames.add(HostnameUtil.getHostname());
hostnames.addAll(HostnameUtil.getHostnames("0.0.0.0"));
for (String bindAddress : bindAddresses) {
for (String hostname : hostnames) {
EndpointConfig.Builder builder = EndpointConfig.newBuilder()
.setBindAddress(bindAddress)
.setHostname(hostname)
.setPath("/milo")
.setCertificate(certificate)
.addTokenPolicies(
USER_TOKEN_POLICY_ANONYMOUS,
USER_TOKEN_POLICY_USERNAME,
USER_TOKEN_POLICY_X509
);
EndpointConfig.Builder noSecurityBuilder = builder.copy()
.setSecurityPolicy(SecurityPolicy.None)
.setSecurityMode(MessageSecurityMode.None);
endpointConfigs.add(buildTcpEndpoint(noSecurityBuilder));
// TCP Basic256Sha256 / SignAndEncrypt
endpointConfigs.add(buildTcpEndpoint(
builder.copy()
.setSecurityPolicy(SecurityPolicy.Basic256Sha256)
.setSecurityMode(MessageSecurityMode.SignAndEncrypt))
);
/*
* It's good practice to provide a discovery-specific endpoint with no security.
* It's required practice if all regular endpoints have security configured.
*
* Usage of the "/discovery" suffix is defined by OPC UA Part 6:
*
* Each OPC UA Server Application implements the Discovery Service Set. If the OPC UA Server requires a
* different address for this Endpoint it shall create the address by appending the path "/discovery" to
* its base address.
*/
EndpointConfig.Builder discoveryBuilder = builder.copy()
.setPath("/milo/discovery")
.setSecurityPolicy(SecurityPolicy.None)
.setSecurityMode(MessageSecurityMode.None);
endpointConfigs.add(buildTcpEndpoint(discoveryBuilder));
}
}
return endpointConfigs;
}
private static EndpointConfig buildTcpEndpoint(EndpointConfig.Builder base) {
return base.copy()
.setTransportProfile(TransportProfile.TCP_UASC_UABINARY)
.setBindPort(TCP_BIND_PORT)
.build();
}
public OpcUaServer getServer() {
return server;
}
public CompletableFuture<OpcUaServer> startup() {
return server.startup();
}
public CompletableFuture<OpcUaServer> shutdown() {
exampleNamespace.shutdown();
return server.shutdown();
}
}