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Posted to issues@nifi.apache.org by "David Handermann (Jira)" <ji...@apache.org> on 2021/06/16 17:30:00 UTC

[jira] [Created] (NIFI-8711) Support keyboard-interactive authentication for SFTP

David Handermann created NIFI-8711:
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             Summary: Support keyboard-interactive authentication for SFTP
                 Key: NIFI-8711
                 URL: https://issues.apache.org/jira/browse/NIFI-8711
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Extensions
    Affects Versions: 1.13.2, 1.10.0
            Reporter: David Handermann
            Assignee: David Handermann


Changing the supporting library from JSch to SSHJ resulted in removing support for keyboard-interactive authentication when configuring a password in SFTP components. 

Some SSH servers disable password authentication but support keyboard-interactive authentication.  SSHJ provides support for keyboard-interactive authentication using a password, and SFTP components should attempt both password authentication and keyboard-interactive authentication when a password is configured.

Without support for keyboard-interactive authentication, SFTP processors report the following error even when configured with valid username and password credentials:

{{UserAuthException: Exhausted available authentication methods}}

SSHJ reports the following debug log with valid credentials when the server has disabled password authentication:

{{net.schmizz.sshj.userauth.UserAuthImpl `password` auth failed}}



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