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Posted to dev@mina.apache.org by "Thomas Wolf (JIRA)" <ji...@apache.org> on 2018/10/16 20:46:00 UTC
[jira] [Created] (SSHD-850) sshd client; encrypted private key
identity file: FilePasswordProvider called only once; should be called
NumberOfPasswordPrompts times
Thomas Wolf created SSHD-850:
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Summary: 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
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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