[KARAF-1513] SSH keystore incompatible if generated with IBM JDK

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.2.6
• Fix Version/s: 2.2.8, 2.3.0, 3.0.0
• Component/s: karaf

Environment

java version "1.6.0"
Java(TM) SE Runtime Environment (build pxi3260sr10fp1-20120321_01(SR10 FP1))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux x86-32 jvmxi3260sr10fp1-20120202_101568 (JIT enabled, AOT enabled)
J9VM - 20120202_101568
JIT - r9_20111107_21307ifx1
GC - 20120202_AA)
JCL - 20120320_01

• Assignee: Jean-Baptiste Onofré
• Reporter: Zsolt Beothy-Elo
• Created: 31/May/12 12:40
• Updated: 15/Sep/18 16:35
• Resolved: 20/Jun/12 11:30

Description

After starting the container with karaf script, the consquent attempt to connect to the instance with the client script fails:

/opt/TESB-QA-Workspace/container/bin# ./client -a 8101
950 [NioProcessor-2] WARN org.apache.sshd.client.session.ClientSessionImpl - Exception caught
org.apache.sshd.common.SshException: KeyExchange signature verification failed
at org.apache.sshd.client.kex.AbstractDHGClient.next(AbstractDHGClient.java:121)
at org.apache.sshd.client.session.ClientSessionImpl.doHandleMessage(ClientSessionImpl.java:243)
at org.apache.sshd.client.session.ClientSessionImpl.handleMessage(ClientSessionImpl.java:198)
at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:522)
at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:225)
...

The following stuff is observed in the karaf log:

23:53:42,043 | INFO | NioProcessor-2 | shd.server.session.ServerSession 87 | 22 - sshd-core - 0.5.0 | Session created...
23:53:42,052 | INFO | NioProcessor-2 | AbstractGeneratorHostKeyProvider 149 | 22 - sshd-core - 0.5.0 | Generating host key...
23:53:42,124 | INFO | NioProcessor-2 | shd.server.session.ServerSession 307 | 22 - sshd-core - 0.5.0 | Client version string: SSH-2.0-SSHD-CORE-0.5.0
23:53:42,125 | INFO | NioProcessor-2 | shd.server.session.ServerSession 149 | 22 - sshd-core - 0.5.0 | Received SSH_MSG_KEXINIT
23:53:42,203 | INFO | NioProcessor-2 | shd.server.kex.AbstractDHGServer 84 | 22 - sshd-core - 0.5.0 | Received SSH_MSG_KEXDH_INIT
23:53:42,246 | INFO | NioProcessor-2 | shd.server.kex.AbstractDHGServer 125 | 22 - sshd-core - 0.5.0 | Send SSH_MSG_KEXDH_REPLY
23:53:42,246 | INFO | NioProcessor-2 | d.common.session.AbstractSession 691 | 22 - sshd-core - 0.5.0 | Send SSH_MSG_NEWKEYS
23:53:42,283 | INFO | NioProcessor-2 | shd.server.session.ServerSession 124 | 22 - sshd-core - 0.5.0 | Received SSH_MSG_DISCONNECT (reason=3, msg=KeyExchange signature verification failed)
23:53:42,284 | INFO | NioProcessor-2 | d.common.session.AbstractSession 287 | 22 - sshd-core - 0.5.0 | Closing session

After a certain investigation, the conclusion is made that the issue is connected to the <container>/etc/host.key file, which seems to be generated different under IBM JVM comparing to the one received on Sun Java VM:

ls -al host*
rw-rr- 1 root root 1202 2012-04-25 13:03 host.key.sunjvm
rw-rr- 1 root root 2581 2012-04-25 12:35 host.key
#
(see the difference in size, at least)
If I replace it with a copy of host.key file taken from a different container working under Sun JVM, everything works just fine.

The issue reproduces both, with client script running locally and with a remote one running on Sun Java VM 1.6.0_30.