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https://issues.apache.org/jira/browse/SSHD-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17741536#comment-17741536
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Tobias Gierke edited comment on SSHD-1329 at 7/10/23 10:34 AM:
---------------------------------------------------------------
2.9.2
Call stack of *first* invocation of
KeyIdentityProvider#resolveKeyIdentityProvider is this:
!image-2023-07-10-12-25-51-220.png!
Call stack of *second* invocation of
KeyIdentityProvider#resolveKeyIdentityProvider() is this:
!image-2023-07-10-12-24-22-392.png!
2.10.0
Call stack of only KeyIdentityProvider#resolveKeyIdentityProvider() is this:
!image-2023-07-10-12-28-40-339.png!
So while on 2.9.2 the second resolveIdentityProvider() call (triggered by the
messageReceived() method) does have a non-empty KeyIdentityProvider, 2.10.0
only calls resolveIdentityProvider() once (also from messageReceived()) but in
this case the KeyIdentityProvider is still empty.
So the question is: Why does
org.apache.sshd.client.session.ClientSession#getKeyIdentityProvider return an
empty provider on 2.10.0 but not on 2.9.2 ?
was (Author: tgierke2342):
2.9.2
Call stack of *first* invocation of
KeyIdentityProvider#resolveKeyIdentityProvider is this:
!image-2023-07-10-12-25-51-220.png!
Call stack of *second* invocation of
KeyIdentityProvider#resolveKeyIdentityProvider() is this:
!image-2023-07-10-12-24-22-392.png!
2.10.0
Call stack of only KeyIdentityProvider#resolveKeyIdentityProvider() is this:
!image-2023-07-10-12-28-40-339.png!
So while on 2.9.2 the second resolveIdentityProvider() call (triggered by the
messageReceived() method) does have a non-empty KeyIdentityProvider, 2.10.0
only calls resolveIdentityProvider() once (also from messageReceived()) but in
this case the KeyIdentityProvider is still empty.
So the question is now: Why does
org.apache.sshd.client.session.ClientSession#getKeyIdentityProvider return an
empty provider on 2.10.0 but not on 2.9.2 ?
> SSH Public key authentication works with 2.9.2 but fails with 2.10.0
> --------------------------------------------------------------------
>
> Key: SSHD-1329
> URL: https://issues.apache.org/jira/browse/SSHD-1329
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 2.10.0
> Reporter: Tobias Gierke
> Priority: Major
> Attachments: failure_2.10.0.log, image-2023-06-26-17-10-43-547.png,
> image-2023-07-10-11-16-03-470.png, image-2023-07-10-11-31-54-206.png,
> image-2023-07-10-11-48-25-736.png, image-2023-07-10-11-54-05-391.png,
> image-2023-07-10-11-56-35-508.png, image-2023-07-10-12-04-00-532.png,
> image-2023-07-10-12-08-39-123.png, image-2023-07-10-12-12-02-825.png,
> image-2023-07-10-12-24-22-392.png, image-2023-07-10-12-25-51-220.png,
> image-2023-07-10-12-28-40-339.png, sshd-bug-test.tgz, success_2.9.2.log
>
>
> After upgrading to Apache SSHD 2.10.0 we noticed that SSH public key
> authentication stopped working.
> On 2.9.2 the handshake looks like this:
> {code:java}
> 2023-06-19T13:12:18,405 [sshd-SshClient[1255b1d1]-nio2-thread-4|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> processUserAuth(ClientSessionImpl[[email protected]/192.168.188.250:22]
> ) Received SSH_MSG_USERAUTH_FAILURE - partial=false,
> methods=publickey,gssapi-keyex,gssapi-with-mic,password
> 2023-06-19T13:12:18,405 [sshd-SshClient[1255b1d1]-nio2-thread-4|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22])
> starti
> ng authentication mechanisms: client=[publickey, keyboard-interactive,
> password], server=[publickey, gssapi-keyex, gssapi-with-mic, password]
> 2023-06-19T13:12:18,405 [sshd-SshClient[1255b1d1]-nio2-thread-4|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22])
> attempting method=publickey
> 2023-06-19T13:12:18,416 [sshd-SshClient[1255b1d1]-nio2-thread-4|] TRACE
> org.apache.sshd.common.config.keys.loader.pem.RSAPEMResourceKeyPairParser []
> - -----BEGIN RSA PRIVATE KEY----- [chunk #1](16/609)
> 30:82:02:5d:02:01:00:02:81:81:00:c1:a3:3a:25:23 0..].........:%#
> ..... {code}
> while on 2.10.0 the key is not found/loaded:
> {code:java}
> 2023-06-19T13:13:41,529 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientSessionImpl [] -
> doHandleMessage(ClientSessionImpl[[email protected]/192.168.188.250:22])
> process #5 SSH_MSG_USERAUTH_FAILURE
> 2023-06-19T13:13:41,529 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> processUserAuth(ClientSessionImpl[[email protected]/192.168.188.250:22])
> Received SSH_MSG_USERAUTH_FAILURE - partial=false,
> methods=publickey,gssapi-keyex,gssapi-with-mic,password
> 2023-06-19T13:13:41,529 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22])
> starting authentication mechanisms: client=[publickey, keyboard-interactive,
> password], server=[publickey, gssapi-keyex, gssapi-with-mic, password]
> 2023-06-19T13:13:41,530 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22])
> attempting method=publickey
> 2023-06-19T13:13:41,532 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.auth.pubkey.UserAuthPublicKey [] -
> resolveAttemptedPublicKeyIdentity(ClientSessionImpl[[email protected]/192.168.188.250:22])[ssh-connection]
> no more keys to send
> 2023-06-19T13:13:41,532 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22]) no
> initial request sent by method=publickey
> 2023-06-19T13:13:41,532 [sshd-SshClient[495083a0]-nio2-thread-6|] TRACE
> org.apache.sshd.client.auth.pubkey.UserAuthPublicKey [] -
> releaseKeys(ClientSessionImpl[[email protected]/192.168.188.250:22])
> closing
> UserAuthPublicKeyIterator[ClientSessionImpl[[email protected]/192.168.188.250:22]]
> 2023-06-19T13:13:41,532 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.auth.pubkey.UserAuthPublicKey [] -
> destroy(ClientSessionImpl[[email protected]/192.168.188.250:22])[ssh-connection]
> 2023-06-19T13:13:41,533 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22])
> attempting method=password
> 2023-06-19T13:13:41,534 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.auth.password.UserAuthPassword [] -
> resolveAttemptedPassword(ClientSessionImpl[[email protected]/192.168.188.250:22])[ssh-connection]
> no more passwords to send
> 2023-06-19T13:13:41,534 [sshd-SshClient[495083a0]-nio2-thread-6|] DEBUG
> org.apache.sshd.client.session.ClientUserAuthService [] -
> tryNext(ClientSessionImpl[[email protected]/192.168.188.250:22]) no
> initial request sent by method=password {code}
> I've attached a Maven project that contains an almost-self-contained unit
> test that showcases the behaviour. For the test to work you'll need
> - to have some SSH server up & running
> - put the test's SSH public key (from src/test/resources/test_ssh_key.pub)
> into an authorized_keys file on the server
> - Adjust the test source code to use the right server name and user name (I
> used root)
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