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Full Discussion: SFTP password through shell script.
Top Forums Shell Programming and Scripting SFTP password through shell script. Post 302813759 by rbatte1 on Tuesday 28th of May 2013 05:37:41 AM
Old 05-28-2013
Could you generate a key pair with ssh-keygen, retrieve the .ssh/authorized keys from the target server, add your public key to the file and then put that back to the server? That might give you a password-less sign on, but of course, it depends if the server locks your account to a directory from which you cannot get to the .ssh directory. The directory might not exist, so you could probably create it, but you will need to make sure the permissions are rwx --- ---

If you already have a key pair generated, consider connecting as normal with SFTP and:-
Code:
sftp> get .ssh/authorized_keys server_keys
:
:
sftp> !cat server_keys .ssh/id_rsa.pub > new_server_keys
sftp> put new_server_keys .ssh/authorized_keys
:
:
sftp> quit
$ sftp remote-server

Of course, this assumes that the remote server put it's authentication files in ~/.ssh and that you can get to it, but it might be worth a try.


Look in ~/.ssh to see if you already have key generated, but to generate a key-pair / pair of certificates, just run ssh-keygen and follow the prompts.



I hope that this helps. It is not tested and perhaps it's just the hacker in me with a twisted mind, but this might get you going and ease the SFTP to becoming:-
Code:
sftp -b sftp.cmds server

... where sftp.cmds is a plain file containing the cd, get, put or whatever commands to execute when connected.




Robin
Liverpool/Blackburn
UK
Last edited by rbatte1; 05-28-2013 at 06:38 AM.. Reason: Re-phrased a bit
 

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LEARN ABOUT DEBIAN

libssh2_sftp_init

libssh2_sftp_init(3)						  libssh2 manual					      libssh2_sftp_init(3)

NAME

       libssh2_sftp_init - open SFTP channel for the given SSH session.

SYNOPSIS

       #include <libssh2.h> #include <libssh2_sftp.h>

       LIBSSH2_SFTP * libssh2_sftp_init(LIBSSH2_SESSION *session);

DESCRIPTION

       session - Session instance as returned by libssh2_session_init_ex(3)

       Open  a	channel and initialize the SFTP subsystem. Although the SFTP subsystem operates over the same type of channel as those exported by
       the Channel API, the protocol itself implements its own unique binary packet protocol which must be managed with the libssh2_sftp_*()  fam-
       ily of functions. When an SFTP session is complete, it must be destroyed using the libssh2_sftp_shutdown(3) function.

RETURN VALUE

       A pointer to the newly allocated SFTP instance or NULL on failure.

ERRORS

       LIBSSH2_ERROR_ALLOC -  An internal memory allocation call failed.

       LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

       LIBSSH2_ERROR_SOCKET_TIMEOUT -

       LIBSSH2_ERROR_SFTP_PROTOCOL  - An invalid SFTP protocol response was received on the socket, or an SFTP operation caused an errorcode to be
       returned by the server.

       LIBSSH2_ERROR_EAGAIN - Marked for non-blocking I/O but the call would block.

SEE ALSO

       libssh2_sftp_shutdown(3) libssh2_sftp_open_ex(3)

libssh2 0.15							    1 Jun 2007						      libssh2_sftp_init(3)
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