[SSHD-169] Exceptions Handling: java.lang.IllegalStateException Unable to negociate key exchange

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.6.0
• Labels: exception exception-handling keys permissions server sshd

Environment

uname -a
Linux vm-dcache-deploy5 2.6.32-5-amd64 #1 SMP Mon Jan 16 16:22:28 UTC 2012 x86_64 GNU/Linux
java -version
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8.13) (6b18-1.8.13-0+squeeze1)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)

• Assignee: Guillaume Nodet
• Reporter: Christian Bernardt
• Created: 25/May/12 10:56
• Updated: 23/Jul/13 15:21
• Resolved: 23/Jul/13 15:21

Description

To reproduce the problem:

1.) Create dsa SERVER keys, set permissions and ownership
2.) Start the SshServer
3.) Initiate client ssh connection to this server(to check it is working)
4.) alter ownership of dsa SERVER keys
5.) Initiate client ssh connection to this server

You will get the exception that you can find below.
While this exception is totally valid, because I just stole the server its keys I would like to be able to react on such an exception by saying in server logs: Hey the server key permissions are wrong. I did not find a way to catch this exception on my side of the code.

Is this intended or am I not seeing the way to do that?

Thanks.

Chris

----------------------------------------
[] Exception caught
java.lang.IllegalStateException: Unable to negociate key exchange for item 1
at org.apache.sshd.common.session.AbstractSession.negociate(AbstractSession.java:902) ~[sshd-core-0.6.0.jar:0.6.0]
at org.apache.sshd.server.session.ServerSession.handleMessage(ServerSession.java:159) ~[sshd-core-0.6.0.jar:0.6.0]
at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:538) ~[sshd-core-0.6.0.jar:0.6.0]
at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:232) ~[sshd-core-0.6.0.jar:0.6.0]
at org.apache.sshd.common.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:58) ~[sshd-core-0.6.0.jar:0.6.0]
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:716) ~[mina-core-2.0.2.jar:na]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:693) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:646) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:635) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:67) [mina-core-2.0.2.jar:na]
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1079) [mina-core-2.0.2.jar:na]
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) [mina-core-2.0.2.jar:na]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [na:1.6.0_18]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [na:1.6.0_18]
at java.lang.Thread.run(Thread.java:636) [na:1.6.0_18]

Issue Links

• is related to: SSHD-242 Raise log statements levels for key pair reading to WARN