Re: [Duplicity-talk] Biggest nightmare

[Edgar Soldin]

Didn't know that. Pretty sure you are welcome to deliver patches ...
regards ede
--
> Edgar Soldin a écrit :
>   
>> could you clear that up for me? ..ede
>>     
>
> Suppose you wanted to implement my solution, that is, protect the
> backups, by only allowing create new file, read and list operations.
> Currently, duplicity uses both SFTP and SCP for the „ssh://” URL, which
> would mean that you would have to implement both a restricted SFTP and a
> restricted SCP server.
>
> In order reduce the effort of coding such a restricted server, I propose
> creating a „pure” SFTP backend.
>
>   
>>> Edgar Soldin a écrit :
>>>   
>>>       
>>>> A backup repository pulling the backups from the duplicity host seems
>>>> easier to setup to me.
>>>> Why would you want a pure sftp backend?
>>>>     
>>>>         
>>> So that you only need to write a resticted SFTP server, without having
>>> to write a restricted SCP server.
>>>
>>>   
>>>       
>>>> ... ede
>>>>     
>>>>         
>>>>> I would like to add another idea and know what you're thinking about it.
>>>>> Everything duplicity needs for „normal” backup operations is to list
>>>>> files, read files and create new (non-existing) files. So I thought
>>>>> about creating a restricted SFTP server, which would allow exactly these
>>>>> three operations. Then an evil attacker could not compromise backups.
>>>>>
>>>>> A user who has an SSH account on a backup host, would use two keys:
>>>>> a) not-password-protected, restricted to SFTP
>>>>> b) password-protected, restricted to backup maintainance, which he
>>>>> should actually *never* use
>>>>>
>>>>> Unfortunately, I could not find any Restricted SFTP server, but writing
>>>>> a paramiko-based one should not be too difficult. Also, duplicity does
>>>>> not currently have a „pure” SFTP backend, but again, this should be
>>>>> piece of cake.
>>>>>
>>>>> So, what do you think?
>>>>>
>>>>>
>>>>>
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