Hi,
We are using Apache MINA SSHD. We want to enable use of hmac-sha2-256 & hmac-sha2-512 algorithms as per RFC 6668. We have created Factory classes for these algorithms and have set the factory classes in the SshServer class. But following exception is being thrown: org.apache.sshd.common.SshException: MAC Error at org.apache.sshd.common.session.AbstractSession.decode (AbstractSession.java:481) at org.apache.sshd.common.session.AbstractSession.messageReceived (AbstractSession.java:230) at org.apache.sshd.common.AbstractSessionIoHandler.messageReceived (AbstractSessionIoHandler.java:72) at org.apache.mina.core.filterchain.DefaultIoFilterChain $TailFilter.messageReceived(DefaultIoFilterChain.java:713) at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived (DefaultIoFilterChain.java:434) at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$5 (DefaultIoFilterChain.java:429) at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl $1.messageReceived(DefaultIoFilterChain.java:793) at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived (IoFilterAdapter.java:119) at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived (DefaultIoFilterChain.java:434) at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived (DefaultIoFilterChain.java:426) at org.apache.mina.core.polling.AbstractPollingIoProcessor.read (AbstractPollingIoProcessor.java:638) at org.apache.mina.core.polling.AbstractPollingIoProcessor.process (AbstractPollingIoProcessor.java:598) at org.apache.mina.core.polling.AbstractPollingIoProcessor.process (AbstractPollingIoProcessor.java:587) at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$7 (AbstractPollingIoProcessor.java:584) at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run (AbstractPollingIoProcessor.java:969) at org.apache.mina.util.NamePreservingRunnable.run (NamePreservingRunnable.java:64) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask (ThreadPoolExecutor.java:897) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:919) at java.lang.Thread.run(Thread.java:736) >From the client library, we were able to connect to another server successfully using hmac-sha2-256. So why is this exception being thrown in Apache SSHD server & how can it be resolved? Thanks & regards, Anurag, Advisory Software Engineer, B2B & Commerce, Industry Solutions, ISL, IBM, #4/1, 2nd floor, Tower D, IBC Knowledge Park, Bannerghatta road, Bangalore, India - 560029. Phone (O): +91-80-49126451, ext: 26451, Tie-line: 26451.
