Review Request: More kio_sftp login related fixes

Dawit Alemayehu adawit at
Thu Apr 26 04:42:56 BST 2012

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(Updated April 26, 2012, 3:42 a.m.)

Review request for KDE Runtime and Andreas Schneider.


* Renamed sftpOpen to sftpLogin.
* Added a new sftpOpenConnection function and moved the portion of the code that performs connection and creation of a new ssh session there from openConnection. This makes it much easier to disconnect and reconnect without having to retry all the potential authentication methods.


This is the last one of the sftp login fixes series and addresses the following problems:    

#1. Correctly handle login failure that results from a different username being used when setting the 
SSH_OPTIONS_USER option and calling ssh_userauth_password. I think this might have been due to
a regression caused by my previous patch. Nonetheless, this patch addresses it.

#2. Changed public key authentication so that incorrect public key passwords generate a retry dialog
instead of simply continuing to the next available authentication method.

Diffs (updated)

  kioslave/sftp/kio_sftp.h f497c0b 
  kioslave/sftp/kio_sftp.cpp e38c629 



Testing for #1:
1.) Make sure a ssh server is running on your system.
2.) Attempt to login into your system: sftp://
3.) When prompted for credentials, enter a user name other than the currently logged in user.

Current Behavior:
Login attempt will simply fail eventually and and error page is displayed.

New (Fixed) Behavior:
Successfully log into the server with the specified user name.

Testing for #2:
1.) Create a ssh key with password protection and add it to the authorized_keys file.
2.) Make sure the ssh public key is in your .ssh directory.
3.) Attempt to login into your system: sftp://
4.) When prompted for the passpharse for the key, enter a bogus password. 

Current behavior:
No retry dialog is ever shown for an invalid or improper ssh key passphrase and the process simply moves on to the next authentication method.

New(Fixed) behavior:
Show a retry dialog if the failure is due to invalid password. If the user then presses cancel on the retry dialog, simply behave the same way as if the cancel button is pressed on the password dialog. That is continue onto the next authentication method.


Dawit Alemayehu

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