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Thomas Wolf commented on SSHD-945: ---------------------------------- The problem is not the key per se. OpenSSH client and server even work with a DSA2048 key, but they still use a 160bit SHA1 signature hash, which is an insecure setup. The signature hash should be 224 or 256 bits for such keys. If a client uses a different signature hash, it'll violate RFC 4253 and it's unlikely that this would work with an OpenSSH server. > DSA 2048 public key authentication fails > ---------------------------------------- > > Key: SSHD-945 > URL: https://issues.apache.org/jira/browse/SSHD-945 > Project: MINA SSHD > Issue Type: Bug > Affects Versions: 2.1.0 > Reporter: Logan > Priority: Major > Attachments: DSAKeyTests.java, maverick_id_dsa > > > While RSA 1024, 2048 and DSA 1024 keys succeed, DSA 2048 fails with error > trace listed below. I am trying to figure out if the issue is related to DSA > keys generated by JDK or apache SSHD. Attached is the test case. > > Tests with JSch API also fail with DSA 2048 keys. > > Error trace: > {code:java} > org.apache.sshd.common.SshException: No more authentication methods > availableorg.apache.sshd.common.SshException: No more authentication methods > available at > org.apache.sshd.client.session.ClientUserAuthService.tryNext(ClientUserAuthService.java:318) > at > org.apache.sshd.client.session.ClientUserAuthService.processUserAuth(ClientUserAuthService.java:254) > at > org.apache.sshd.client.session.ClientUserAuthService.process(ClientUserAuthService.java:201) > at > org.apache.sshd.common.session.helpers.AbstractSession.doHandleMessage(AbstractSession.java:626) > at > org.apache.sshd.common.session.helpers.AbstractSession.handleMessage(AbstractSession.java:559) > at > org.apache.sshd.common.session.helpers.AbstractSession.decode(AbstractSession.java:1542) > at > org.apache.sshd.common.session.helpers.AbstractSession.messageReceived(AbstractSession.java:520) > at > org.apache.sshd.common.session.helpers.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:63) > at > org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:339) > at > org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:318) > at > org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:315) > at > org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38) > at java.security.AccessController.doPrivileged(Native Method) at > org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37) > at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126) at > sun.nio.ch.Invoker$2.run(Invoker.java:218) at > sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748){code} > [^DSAKeyTests.java] -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org For additional commands, e-mail: dev-h...@mina.apache.org