我正在从Eclipse Milo客户端连接到Eclipse Milo服务器。一切正常，但是尝试连接除“ None”以外的任何SecurityPolicy时，都会出现以下错误：
17:28:18.365 [main] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - connect(), currentState=NotConnected
17:28:18.365 [main] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - connect() while NotConnected
java.lang.Exception: null
at org.eclipse.milo.opcua.stack.client.ClientChannelManager.connect(ClientChannelManager.java:67) [stack-client-0.2.3.jar:0.2.3]
at org.eclipse.milo.opcua.stack.client.UaTcpStackClient.connect(UaTcpStackClient.java:127) [stack-client-0.2.3.jar:0.2.3]
at org.eclipse.milo.opcua.sdk.client.OpcUaClient.connect(OpcUaClient.java:312) [sdk-client-0.2.3.jar:0.2.3]
at de.dlh.lht.ticc.esa.opcua.client.lib.LhtOpcUaClient.connect(LhtOpcUaClient.java:86) [classes/:?]
at de.dlh.lht.ticc.esa.opcua.client.lib.TestTools.runWithCredentials(TestTools.java:41) [test-classes/:?]
at de.dlh.lht.ticc.esa.opcua.client.lib.ConnectAgainstMiloServerTest.credentialsTest(ConnectAgainstMiloServerTest.java:48) [test-classes/:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_101]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_101]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_101]
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) [junit-4.12.jar:4.12]
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) [junit-4.12.jar:4.12]
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) [junit-4.12.jar:4.12]
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) [junit-4.12.jar:4.12]
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) [junit-rt.jar:?]
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) [junit-rt.jar:?]
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) [junit-rt.jar:?]
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) [junit-rt.jar:?]
17:28:18.367 [ua-shared-pool-0] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - Channel bootstrap failed: null
java.nio.channels.ClosedChannelException: null
de.dlh.lht.ticc.esa.opcua.client.lib.exceptions.ClientExecutionException: java.util.concurrent.ExecutionException: java.nio.channels.ClosedChannelException
at de.dlh.lht.ticc.esa.opcua.client.lib.LhtOpcUaClient.connect(LhtOpcUaClient.java:88)
at de.dlh.lht.ticc.esa.opcua.client.lib.TestTools.runWithCredentials(TestTools.java:41)
at de.dlh.lht.ticc.esa.opcua.client.lib.ConnectAgainstMiloServerTest.credentialsTest(ConnectAgainstMiloServerTest.java:48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.util.concurrent.ExecutionException: java.nio.channels.ClosedChannelException
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
at de.dlh.lht.ticc.esa.opcua.client.lib.LhtOpcUaClient.connect(LhtOpcUaClient.java:86)
... 24 more
Caused by: java.nio.channels.ClosedChannelException
有什么主意吗？
当我使用带有私钥以及用户名/密码凭据的证书时，会发生这种情况。服务器端日志
DEBUG o.e.m.o.s.s.h.UaTcpServerAsymmetricHandler - Received CloseSecureChannelRequest
所以我认为客户就是这里的问题。其他opc-ua服务器也会发生相同的问题。
编辑：我创建了一个发生错误的最小示例
package de.dlh.lht.ticc.esa.opcua.client.lib;
import org.eclipse.milo.opcua.sdk.client.OpcUaClient;
import org.eclipse.milo.opcua.sdk.client.api.config.OpcUaClientConfig;
import org.eclipse.milo.opcua.sdk.client.api.config.OpcUaClientConfigBuilder;
import org.eclipse.milo.opcua.sdk.client.api.identity.UsernameProvider;
import org.eclipse.milo.opcua.stack.client.UaTcpStackClient;
import org.eclipse.milo.opcua.stack.core.security.SecurityPolicy;
import org.eclipse.milo.opcua.stack.core.types.structured.EndpointDescription;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Arrays;
public class SmokeTest {
private static final Logger log = LoggerFactory.getLogger(SmokeTest.class);
private static EndpointDescription getEndpointDescriptions(String endpoint, SecurityPolicy securityPolicy) throws Exception {
EndpointDescription[] endpoints;
try {
endpoints = UaTcpStackClient
.getEndpoints(endpoint)
.get();
} catch (Exception ex) {
log.warn("failed to get endpoints", ex);
log.warn("will try to explicitly discover endpoints");
String discoveryUrl = endpoint + "/discovery";
log.info("Trying explicit discovery URL: {}", discoveryUrl);
endpoints = UaTcpStackClient
.getEndpoints(discoveryUrl)
.get();
}
EndpointDescription endpointDescription = Arrays.stream(endpoints)
.filter(e -> e.getSecurityPolicyUri().equals(securityPolicy.getSecurityPolicyUri()))
.findFirst().orElseThrow(() -> new Exception("no valid endpoint found for '" + endpoint + "'"));
return endpointDescription;
}
@Test
public void runTest() throws Exception {
OpcUaClientConfigBuilder builder = OpcUaClientConfig.builder();
EndpointDescription endpointDescription =
getEndpointDescriptions("opc.tcp://127.0.0.1:12686/example", SecurityPolicy.Basic128Rsa15);
builder
.setEndpoint(endpointDescription);
builder.setIdentityProvider(new UsernameProvider(
"user",
"password1"
));
OpcUaClient client = new OpcUaClient(builder.build());
client.connect().get();
Thread.sleep(1000 * 10);
client.disconnect().get();
}
}
此测试针对eclipse milo示例服务器运行： https://github.com/eclipse/milo/blob/master/milo-examples/server-examples/src/main/java/org/eclipse/milo/examples/server/ExampleServer.java
另一个更新： 最让我烦恼的是以下行为
09:19:09.040 [ua-shared-pool-0] DEBUG org.eclipse.milo.opcua.stack.client.handlers.UaTcpClientMessageHandler - Received OpenSecureChannelResponse.
09:19:09.040 [ua-shared-pool-0] DEBUG org.eclipse.milo.opcua.stack.client.handlers.UaTcpClientMessageHandler - SecureChannel id=4, currentTokenId=4, previousTokenId=-1, lifetime=3600000ms, createdAt=DateTime{utcTime=131860523490250000, javaDate=Wed Nov 07 09:19:09 CET 2018}
09:19:09.040 [ua-netty-event-loop-0] DEBUG org.eclipse.milo.opcua.stack.client.handlers.UaTcpClientMessageHandler - 0 message(s) queued before handshake completed; sending now.
09:19:09.040 [ua-shared-pool-1] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - Channel bootstrap succeeded: localAddress=/127.0.0.1:50437, remoteAddress=/127.0.0.1:12686
09:19:09.134 [ua-shared-pool-0] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - disconnect(), currentState=Connected
09:19:09.134 [ua-shared-pool-1] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - Sending CloseSecureChannelRequest...
似乎客户端连接成功，但是随后来自上面的冒烟测试的客户端立即立即再次断开连接，而在不使用SecurityPolicy的情况下则不会这样做。
即使很奇怪，在此之后，日志也会继续显示：
09:28:12.283 [ua-netty-event-loop-0] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - channelInactive(), disconnect complete
09:28:12.283 [ua-netty-event-loop-0] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - disconnect complete, state set to Idle
09:28:12.299 [main] INFO org.eclipse.milo.opcua.sdk.client.OpcUaClient - Eclipse Milo OPC UA Stack version: 0.2.4
09:28:12.299 [main] INFO org.eclipse.milo.opcua.sdk.client.OpcUaClient - Eclipse Milo OPC UA Client SDK version: 0.2.4
09:28:12.315 [main] DEBUG org.eclipse.milo.opcua.sdk.client.OpcUaClient - Added ServiceFaultListener: org.eclipse.milo.opcua.sdk.client.session.SessionFsm$FaultListener@333d4a8c
09:28:12.330 [main] DEBUG org.eclipse.milo.opcua.sdk.client.OpcUaClient - Added SessionActivityListener: org.eclipse.milo.opcua.sdk.client.subscriptions.OpcUaSubscriptionManager$1@71687585
09:28:12.440 [main] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - connect(), currentState=NotConnected
09:28:12.440 [main] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - connect() while NotConnected
java.lang.Exception: null
at org.eclipse.milo.opcua.stack.client.ClientChannelManager.connect(ClientChannelManager.java:67) [stack-client-0.2.4.jar:0.2.4]
at org.eclipse.milo.opcua.stack.client.UaTcpStackClient.connect(UaTcpStackClient.java:127) [stack-client-0.2.4.jar:0.2.4]
at org.eclipse.milo.opcua.sdk.client.OpcUaClient.connect(OpcUaClient.java:312) [sdk-client-0.2.4.jar:0.2.4]
at de.dlh.lht.ticc.esa.opcua.client.lib.SmokeManualTest.run(SmokeManualTest.java:95) [test-classes/:?]
at de.dlh.lht.ticc.esa.opcua.client.lib.SmokeManualTest.credentialsTest(SmokeManualTest.java:104) [test-classes/:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_101]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_101]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_101]
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) [junit-4.12.jar:4.12]
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) [junit-4.12.jar:4.12]
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) [junit-4.12.jar:4.12]
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) [junit-4.12.jar:4.12]
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) [junit-4.12.jar:4.12]
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) [junit-4.12.jar:4.12]
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) [junit-rt.jar:?]
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) [junit-rt.jar:?]
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) [junit-rt.jar:?]
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) [junit-rt.jar:?]
09:28:12.440 [ua-shared-pool-0] DEBUG org.eclipse.milo.opcua.stack.client.ClientChannelManager - Channel bootstrap failed: null
java.nio.channels.ClosedChannelException: null
因此，看起来ClientChannelManager在自身触发的断开连接后尝试尝试连接。
我尝试的另一件事是
builder.setCertificateValidator( new InsecureCertificateValidator());
假设自签名服务器证书被拒绝，但没有帮助。甚至没有打印该类的日志，因此我假设未调用证书验证器，并且错误发生的时间更早。
只是为了好玩，我还添加了
static {
CryptoRestrictions.remove();
Security.addProvider(new BouncyCastleProvider());
}
进行我的烟雾测试。还是没有运气
答案 0 :(得分：1)
当然，这是一个非常简单的问题。日志中的其他错误与它无关。
再次查看Understanding OPC-UA Security using Eclipse Milo很有帮助。
请参阅，当您使用不是“无”的SecurityPolicy时，您始终需要应用程序证书，因为该证书用于消息加密和签名。它也是一个有点特殊的证书，因为它包含必须匹配您通过builder.setApplicationUri（）
为客户端配置的应用程序uri的应用程序uri。通过证书使用身份验证时，您提供第二证书（和私钥），用于在服务器上确认您的身份。这就是为什么您可以通过证书或用户名/密码进行身份验证，而完全没有消息加密和签名的原因