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https://issues.apache.org/jira/browse/SSHD-1177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17356700#comment-17356700
]
Steven commented on SSHD-1177:
------------------------------
I think the authentication details can be specified in the SshClient object
itself, that seems to be working. Thanks
> SshClient connect method throws exception when called with HostConfigEntry
> using proxy jump
> -------------------------------------------------------------------------------------------
>
> Key: SSHD-1177
> URL: https://issues.apache.org/jira/browse/SSHD-1177
> Project: MINA SSHD
> Issue Type: Question
> Affects Versions: 2.6.0, 2.7.0
> Environment: Windows 10, java 1.8.0_271
> Ubuntu 20.04.2 LTS, 14.0.2+12-Ubuntu-120.04
> Reporter: Steven
> Priority: Major
> Attachments: AppTest.java
>
>
> Our application has a requirement to connect through a proxy and execute SFTP
> commands.
> My question is 1) Am I using the proxy jump correctly? and 2) If I am, is
> this a bug?
> This example works correctly:
> {\{ SshClient client = SshClient.setUpDefaultClient();}}
> \{{ client.start();}}
> {\{ try (ClientSession session = client.connect("<USER_NAME>", "<HOST_ONE>",
> 22)}}
> \{{ .verify(1000*1000).getSession()) {}}
> {{ assertNotNull(session);}}
> {{ session.addPasswordIdentity("<PASSWORD>");}}
> {{ session.auth().verify(1000*30);}}
> {{ assertTrue(session.isAuthenticated());}}
> {{ System.out.println(session.isAuthenticated());}}
> {\{ } catch (IOException e) {}}
> {{ e.printStackTrace();}}
> \{{ }}}
> \{{}}
>
> This example fails with "org.apache.sshd.common.SshException: No more
> authentication methods available"
>
> {\{ SshClient client = SshClient.setUpDefaultClient();}}
> \{{ client.start();}}
> {\{ try (ClientSession session = client.connect(new HostConfigEntry("",
> "<HOST_ONE>", 22,}}
> \{{ "<USER_NAME>", "<USER_NAME>" + "@" + "<HOST_TWO>" + ":" + "22"))}}
> \{{ .verify(1000*1000).getSession()) {}}
> {{ assertNotNull(session);}}
> {{ session.addPasswordIdentity("<PASSWORD>");}}
> {{ session.auth().verify(1000*30);}}
> {{ assertTrue(session.isAuthenticated());}}
> {{ System.out.println(session.isAuthenticated());}}
> \{{ } catch (IOException e) \{ }}
> {{ e.printStackTrace();}}
> \{{ } }}
>
>
> Stack trace:
> org.apache.sshd.common.SshException: No more authentication methods available
> at
> org.apache.sshd.common.future.AbstractSshFuture.verifyResult(AbstractSshFuture.java:126)
> at
> org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:42)
> at
> org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:34)
> at
> com.precisely.SFTPClient.AppTest.testSshConnectionWithProxyJump(AppTest.java:75)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at junit.framework.TestCase.runTest(TestCase.java:154)
> at junit.framework.TestCase.runBare(TestCase.java:127)
> at junit.framework.TestResult$1.protect(TestResult.java:106)
> at junit.framework.TestResult.runProtected(TestResult.java:124)
> at junit.framework.TestResult.run(TestResult.java:109)
> at junit.framework.TestCase.run(TestCase.java:118)
> at junit.framework.TestSuite.runTest(TestSuite.java:208)
> at junit.framework.TestSuite.run(TestSuite.java:203)
> at
> org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:124)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
> Caused by: org.apache.sshd.common.SshException: No more authentication
> methods available
> at
> org.apache.sshd.client.session.ClientUserAuthService.tryNext(ClientUserAuthService.java:353)
> at
> org.apache.sshd.client.session.ClientUserAuthService.processUserAuth(ClientUserAuthService.java:288)
> at
> org.apache.sshd.client.session.ClientUserAuthService.process(ClientUserAuthService.java:225)
> at
> org.apache.sshd.common.session.helpers.AbstractSession.doHandleMessage(AbstractSession.java:503)
> at
> org.apache.sshd.common.session.helpers.AbstractSession.handleMessage(AbstractSession.java:429)
> at
> org.apache.sshd.common.session.helpers.AbstractSession.decode(AbstractSession.java:1466)
> at
> org.apache.sshd.common.session.helpers.AbstractSession.messageReceived(AbstractSession.java:389)
> at
> org.apache.sshd.common.session.helpers.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:64)
> at org.apache.sshd.mina.MinaService.messageReceived(MinaService.java:156)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:997)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:641)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1114)
> at
> org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:121)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:641)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:634)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:539)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$1200(AbstractPollingIoProcessor.java:68)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.process(AbstractPollingIoProcessor.java:1241)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.process(AbstractPollingIoProcessor.java:1230)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:683)
> at
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
>
> I was following this sample code here:
> [https://github.com/apache/mina-sshd/blob/master/docs/internals.md#ssh-jumps]
>
> I tried to dig into it a bit, and it looks like when we call
> SshClient.connect the code ends up also attempting to authenticate (hence the
> "No more authentication methods available" exception message). In the first
> example we don't attempt to authenticate until we actually call
> ClientSession.auth.
>
> In both of machines I've tried I'm able to use a terminal to connect with a
> proxy jump and it works successfully.
> (e.g. {{ssh -J user@<bastion:port> <user@remote:port>}})
>
>
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