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https://issues.apache.org/jira/browse/SSHD-850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16652912#comment-16652912
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Goldstein Lyor commented on SSHD-850:
-------------------------------------
These are 2 separate concerns:
* {{keyboard-interactive}} authentication - has nothing to do with decrypting
key files.
* Key files decryption is relevant only for public key authentication.
The 2 are unrelated in any way. What you are describing is a way to allow the
user to enter several times the password for a private key file. This is
possible by providing your own {{KeyPairProvider}} that executes this
functionality.
> sshd client; encrypted private key identity file: FilePasswordProvider called
> only once; should be called NumberOfPasswordPrompts times
> ---------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SSHD-850
> URL: https://issues.apache.org/jira/browse/SSHD-850
> Project: MINA SSHD
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Thomas Wolf
> Priority: Minor
>
> In openssh, the ssh config entry NumberOfPasswordPrompts controls the number
> of times the ssh client keeps asking for a password if the one entered was
> invalid in two cases:
> # keyboard-interactive authentication, and
> # asking for passwords for encrypted private keys in identity files in
> pubkey authentication (see [openssh sources;
> sshconnect2.c|https://github.com/openssh/openssh-portable/blob/1a4a9cf/sshconnect2.c#L1380]).
> sshd-core only has support for (1) through setting the property
> {{ClientAuthenticationManager.PASSWORD_PROMPTS}} in the session's properties.
> There doesn't seem to be any support for FilePasswordProvider to make it
> respect this value.
> {{AbstractPEMResourceKeyPairParser.extractkeyPairs()}} and also
> {{BouncyCastleKeyPairResourceParser.loadKeyPair()}} call
> {{FilePasswordProvider.getPassword()}} exactly once.
> So how can I write a ssh client using sshd that asks the user
> NumberOfPasswordPrompts times? Either I'm missing something, or there is some
> support for this missing in sshd.
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