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https://issues.apache.org/jira/browse/SSHD-1159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Yingfang Chen updated SSHD-1159:
--------------------------------
    Description: 
Keyboard-interactive authentication sent SSH_MSG_USERAUTH_REQUEST twice even 
though we set SshClient 
ClientAuthenticationManager.{color:#9876aa}PASSWORD_PROMPTS 
{color}{color:#172b4d}to 1{color}

{color:#172b4d}Here is console output from ssh command line client. Incorrect 
password is provided{color}

{color:#172b4d}$ssh -vv -o PreferredAuthentications=keyboard-interactive -o 
NumberOfPasswordPrompts=1 user@localhost{color}

...

debug2: service_accept: ssh-userauth
 debug1: SSH2_MSG_SERVICE_ACCEPT received
 _some banner_

debug1: Authentications that can continue: publickey,keyboard-interactive
 debug1: Next authentication method: keyboard-interactive
 debug2: userauth_kbdint
 debug2: we sent a keyboard-interactive packet, wait for reply
 debug2: input_userauth_info_req
 debug2: input_userauth_info_req: num_prompts 1
 Password: 
 {color:#de350b}debug1: Authentications that can continue: 
publickey,keyboard-interactive{color}
 {color:#de350b}debug2: we did not send a packet, disable method{color}
 {color:#de350b}debug1: No more authentication methods to try.{color}
 localhost: Permission denied (publickey,keyboard-interactive).

But in UserAuthenticationManager.java, another SSH_MSG_USERAUTH_REQUEST was 
send before processing SSH_MSG_USERAUTH_FAILURE.

  was:
Keyboard-interactive authentication sent SSH_MSG_USERAUTH_REQUEST twice even 
though we set SshClient 
ClientAuthenticationManager.{color:#9876aa}PASSWORD_PROMPTS 
{color}{color:#172b4d}to 1{color}{color:#9876aa}
{color}

{color:#172b4d}Here is console output from ssh command line client. Incorrect 
password is provided
{color}{color:#172b4d}$ssh -vv -o PreferredAuthentications=keyboard-interactive 
-o NumberOfPasswordPrompts=1 user@localhost{color}

...

debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
_some banner_

debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 1
Password: 
{color:#de350b}debug1: Authentications that can continue: 
publickey,keyboard-interactive{color}
{color:#de350b}debug2: we did not send a packet, disable method{color}
{color:#de350b}debug1: No more authentication methods to try.{color}
localhost: Permission denied (publickey,keyboard-interactive).

But in UserAuthenticationManager.java, another SSH_MSG_USERAUTH_REQUEST was 
send before processing SSH_MSG_USERAUTH_FAILURE.


> Client:Sent SSH_MSG_USERAUTH_REQUEST twice even PASSWORD_PROMPTS=1
> ------------------------------------------------------------------
>
>                 Key: SSHD-1159
>                 URL: https://issues.apache.org/jira/browse/SSHD-1159
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>         Environment: SSHD version:2.2.0
> Java version:openjdk version "11.0.7" 2020-04-14
>            Reporter: Yingfang Chen
>            Priority: Minor
>             Fix For: 2.2.0
>
>         Attachments: log_sent_to_apache_ssh.txt
>
>
> Keyboard-interactive authentication sent SSH_MSG_USERAUTH_REQUEST twice even 
> though we set SshClient 
> ClientAuthenticationManager.{color:#9876aa}PASSWORD_PROMPTS 
> {color}{color:#172b4d}to 1{color}
> {color:#172b4d}Here is console output from ssh command line client. Incorrect 
> password is provided{color}
> {color:#172b4d}$ssh -vv -o PreferredAuthentications=keyboard-interactive -o 
> NumberOfPasswordPrompts=1 user@localhost{color}
> ...
> debug2: service_accept: ssh-userauth
>  debug1: SSH2_MSG_SERVICE_ACCEPT received
>  _some banner_
> debug1: Authentications that can continue: publickey,keyboard-interactive
>  debug1: Next authentication method: keyboard-interactive
>  debug2: userauth_kbdint
>  debug2: we sent a keyboard-interactive packet, wait for reply
>  debug2: input_userauth_info_req
>  debug2: input_userauth_info_req: num_prompts 1
>  Password: 
>  {color:#de350b}debug1: Authentications that can continue: 
> publickey,keyboard-interactive{color}
>  {color:#de350b}debug2: we did not send a packet, disable method{color}
>  {color:#de350b}debug1: No more authentication methods to try.{color}
>  localhost: Permission denied (publickey,keyboard-interactive).
> But in UserAuthenticationManager.java, another SSH_MSG_USERAUTH_REQUEST was 
> send before processing SSH_MSG_USERAUTH_FAILURE.



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