RFC for Sftp?

live_dont_exist · 02-26-2007, 07:09 AM

Hey Guys,
I searched for an RFC on Sftp(the one with SSH)but all I kept getting was the normal FTP Rfc(Simple File transfer protocol). Isn't there an RFC for Sftp? If not is it because it uses the Ssh port and Ssh already has an RFC(4521)?

I was looking to develop a Firefox extension for Sftp. So I wanted to read up on how exactly the technology worked. So any pointers on how I could start off if there's no RFC at all?

NOTE: I'm a Noob at extension development so any pointers regarding this as well will help

Cheers
Arvind

acid_kewpie · 02-26-2007, 07:16 AM

well sftp is really only an example usage of the ssh protocol for data transfer, it's not a standard really, just an application, not a protocol. i think.

live_dont_exist · 02-26-2007, 07:22 AM

Thnx for that but if I want to say; try and develop a Firefox extension for inbuilt Sftp support like here:

Code:

https://addons.mozilla.org/firefox/684/

I'd need to understand how exactly the protocol works, wouldnt I?

If not then what would be the right path to take? If Yes where would you suggest I look for further help on understanding this stuff?

Thnx a bunch
Arvind

acid_kewpie · 02-26-2007, 07:28 AM

well it's the ssh protocol being used, so it's just an alternative use for that. i'd assume that basically you have a "special" ftp shell (well that bits definite... in.sftp i think) and the similarily "special" client. the special shell simply supports the standard ftp command sets and it's just down to the sftp client to understand what the data stream being spat back is... it'll either be control data - directory listings and such, or data. if you start receiving streams that are data then you taken that out of the data and put it to a file as previosuly arranged. this is all just implicitly handled by ssh. obvoisuly none of this is "real" ftp at all, just an emulation thereof. i guess that your main issues are how to differentiate different media types and such, but a search through the original sftp client shoudl hopefully show you how to adapt standard ssh dealings to an alternative use.

live_dont_exist · 02-26-2007, 07:52 AM

How come there is such little available online for Sftp? BTW I found the source code for Putty's version of Sftp. Is that the same as the original Sftp source?

Also I think I found the original source as well. Is this the code I need to look at?

http://openssh.hostingzero.com/portable/

Was hoping that my first coding project wouldn't be so hard

Cheers
Arvind

nx5000 · 02-26-2007, 08:06 AM

It's here:
http://tools.ietf.org/wg/secsh/draft...ecsh-filexfer/

acid_kewpie · 02-26-2007, 08:18 AM

ugh, once again i fall short...

live_dont_exist · 02-26-2007, 08:45 AM

Thnx guys

. Will come back incase me needs help.

Cheers
Arvind