[Cyberduck-trac] [Cyberduck] #159: IO-Error when using an RSA-Key connecting to an SFTP Server

[Cyberduck]

#159: IO-Error when using an RSA-Key connecting to an SFTP Server
---------------------+------------------------------------------------------
 Reporter:  Thomas   |        Owner:  dkocher 
     Type:  defect   |       Status:  assigned
 Priority:  high     |    Milestone:          
Component:  sftp     |      Version:  2.5.4   
 Severity:  blocker  |   Resolution:          
 Keywords:           |  
---------------------+------------------------------------------------------
Changes (by dkocher):

  * status:  new => assigned

Old description:

> Can't get cyberduck to work with sftp-connection using public key auth.
> SSHKeychain and OpenSSH works perfectly.
>
> When using public key authentication, cyberduck TRIES to connect to the
> server but when it comes to key exchange I always get the request:
>
>  IO Error: The SSH key supplied is invalid
>
> I am using an 4096 Bit Key, which works perfectly with OpenSSH (generated
> with the native version of 10.4.4 Tiger).
>
> My sshd log on the sftp server side reads as follow:
>
> Jan 23 12:45:32 mail sshd[17896]: debug3: fd 5 is not O_NONBLOCK
> Jan 23 12:45:32 mail sshd[17902]: debug1: rexec start in 5 out 5 newsock
> 5 pipe 7 sock 8
> Jan 23 12:45:32 mail sshd[17896]: debug1: Forked child 17902.
> Jan 23 12:45:32 mail sshd[17896]: debug3: send_rexec_state: entering fd =
> 8 config len 673
> Jan 23 12:45:32 mail sshd[17896]: debug3: ssh_msg_send: type 0
> Jan 23 12:45:32 mail sshd[17896]: debug3: send_rexec_state: done
> Jan 23 12:45:32 mail sshd[17902]: debug1: inetd sockets after dupping: 3,
> 3
> Jan 23 12:45:32 mail sshd[17902]: Connection from xxx.xxx.xxx.xxx port
> 44234
> Jan 23 12:45:32 mail sshd[17902]: debug1: Client protocol version 2.0;
> client software version J2SSH (Cyberduck) [CLIENT]
> Jan 23 12:45:32 mail sshd[17902]: debug1: no match: J2SSH (Cyberduck)
> [CLIENT]
> Jan 23 12:45:32 mail sshd[17902]: debug1: Enabling compatibility mode for
> protocol 2.0
> Jan 23 12:45:32 mail sshd[17902]: debug1: Local version string
> SSH-2.0-OpenSSH_3.9p1
> Jan 23 12:45:32 mail sshd[17902]: debug2: fd 3 setting O_NONBLOCK
> Jan 23 12:45:32 mail sshd[17902]: debug2: Network child is on pid 17907
> Jan 23 12:45:32 mail sshd[17902]: debug3: preauth child monitor started
> Jan 23 12:45:32 mail sshd[17902]: debug3: mm_request_receive entering
> Jan 23 12:45:33 mail sshd[17902]: debug3: monitor_read: checking request
> 4
> Jan 23 12:45:33 mail sshd[17902]: debug3: mm_answer_sign
> Jan 23 12:45:33 mail sshd[17902]: debug3: mm_answer_sign: signature
> 0x809a7c0(527)
> Jan 23 12:45:33 mail sshd[17902]: debug3: mm_request_send entering: type
> 5
> Jan 23 12:45:33 mail sshd[17902]: debug2: monitor_read: 4 used once,
> disabling now
> Jan 23 12:45:33 mail sshd[17902]: debug3: mm_request_receive entering
> Jan 23 12:45:37 mail sshd[17902]: debug1: do_cleanup

New description:

 Can't get cyberduck to work with sftp-connection using public key auth.
 SSHKeychain and OpenSSH works perfectly.

 When using public key authentication, cyberduck TRIES to connect to the
 server but when it comes to key exchange I always get the request:

  IO Error: The SSH key supplied is invalid

 I am using an 4096 Bit Key, which works perfectly with OpenSSH (generated
 with the native version of 10.4.4 Tiger).

 My sshd log on the sftp server side reads as follow:

 {{{

 Jan 23 12:45:32 mail sshd[17896]: debug3: fd 5 is not O_NONBLOCK
 Jan 23 12:45:32 mail sshd[17902]: debug1: rexec start in 5 out 5 newsock 5
 pipe 7 sock 8
 Jan 23 12:45:32 mail sshd[17896]: debug1: Forked child 17902.
 Jan 23 12:45:32 mail sshd[17896]: debug3: send_rexec_state: entering fd =
 8 config len 673
 Jan 23 12:45:32 mail sshd[17896]: debug3: ssh_msg_send: type 0
 Jan 23 12:45:32 mail sshd[17896]: debug3: send_rexec_state: done
 Jan 23 12:45:32 mail sshd[17902]: debug1: inetd sockets after dupping: 3,
 3
 Jan 23 12:45:32 mail sshd[17902]: Connection from xxx.xxx.xxx.xxx port
 44234
 Jan 23 12:45:32 mail sshd[17902]: debug1: Client protocol version 2.0;
 client software version J2SSH (Cyberduck) [CLIENT]
 Jan 23 12:45:32 mail sshd[17902]: debug1: no match: J2SSH (Cyberduck)
 [CLIENT]
 Jan 23 12:45:32 mail sshd[17902]: debug1: Enabling compatibility mode for
 protocol 2.0
 Jan 23 12:45:32 mail sshd[17902]: debug1: Local version string
 SSH-2.0-OpenSSH_3.9p1
 Jan 23 12:45:32 mail sshd[17902]: debug2: fd 3 setting O_NONBLOCK
 Jan 23 12:45:32 mail sshd[17902]: debug2: Network child is on pid 17907
 Jan 23 12:45:32 mail sshd[17902]: debug3: preauth child monitor started
 Jan 23 12:45:32 mail sshd[17902]: debug3: mm_request_receive entering
 Jan 23 12:45:33 mail sshd[17902]: debug3: monitor_read: checking request 4
 Jan 23 12:45:33 mail sshd[17902]: debug3: mm_answer_sign
 Jan 23 12:45:33 mail sshd[17902]: debug3: mm_answer_sign: signature
 0x809a7c0(527)
 Jan 23 12:45:33 mail sshd[17902]: debug3: mm_request_send entering: type 5
 Jan 23 12:45:33 mail sshd[17902]: debug2: monitor_read: 4 used once,
 disabling now
 Jan 23 12:45:33 mail sshd[17902]: debug3: mm_request_receive entering
 Jan 23 12:45:37 mail sshd[17902]: debug1: do_cleanup
 }}}

-- 
Ticket URL: <http://trac.cyberduck.ch/ticket/159>
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