Re: Encrypting history?

[Guido van Steen <gvsteen@xxxxxxxxx>]

Hi Lloyd, 

With respect to the list of commands issued during
the current session, could you not use "fc -l" to detect the current history line at login? 

Guido 

--- On Mon, 28/12/09, Lloyd Zusman <ljz@xxxxxxxxxxx> wrote:

> From: Lloyd Zusman <ljz@xxxxxxxxxx>
> Subject: Re: Encrypting history?
> To: zsh-users@xxxxxxx
> Date: Monday, 28 December, 2009, 1:56 AM
> Guido van Steen <gvsteen@xxxxxxxxx>
> writes:
> 
> > Hi Lloyd, 
> >
> > Interesting idea indeed! You might miss a feature like
> sharing a history file across sessions. 
> >
> > You could overcome this by seperately saving all your
> sessions' increments to your history file, and then
> incorporating them into the history file when you login
> again. 
> >
> > This way the entries of your history file might get
> out of order, but you could probably handle this by also
> saving the time when your commands were issued. 
> >
> > I would also be interested in a zsh extension like
> that. 
> >
> > Best wishes, 
> >
> > Guido 
> 
> Thank you for reminding me about sharing history across
> sessions.
> 
> I've never written an extension for zsh, and so the first
> thing I plan
> to do is implement this via code in my .zlogin and .zlogout
> files. Then,
> once I get it working, I'll take the plunge and try to turn
> it into an
> extension.
> 
> Concerning this session-specific history issue, is there a
> way to get a
> history list of the commands that were issued only during
> the current
> session? If so, I think I probably could do something like
> this upon
> logout:
> 
> * Lock the current history file
> * Get the history list for the current session
> * Encrypt this history list and append it to the current
>   history file
> * Unlock the current history file
> 
> Would that work?
> 
> 
> 
> > --- On Sun, 27/12/09, Lloyd Zusman <ljz@xxxxxxxxxx>
> wrote:
> >
> >> From: Lloyd Zusman <ljz@xxxxxxxxxx>
> >> Subject: Encrypting history?
> >> To: zsh-users@xxxxxxx
> >> Date: Sunday, 27 December, 2009, 5:55 AM
> >> I would like my command history to be
> >> stored in an encrypted file. I
> >> have read a few messages in this list from 2007
> which state
> >> that there
> >> isn't a straightforward way to do this within zsh,
> itself,
> >> and the use
> >> of an encrypted file system is suggested.
> >> 
> >> However, I think that there might indeed be a way
> to
> >> accomplish this.
> >> 
> >> Is it possible to do the following?
> >> 
> >> Make sure that SAVEHIST is set to 0.
> >> 
> >> Then, on login, prompt the user for a password.
> Remember
> >> this password
> >> for the duration of the shell session. Then, use
> this
> >> password along
> >> with a decryption program to read an encrypted
> history file
> >> called, for
> >> example, ~/.ehistory. Put the decrypted contents
> of this
> >> file into the
> >> current shell's history list via the repeated use
> of the
> >> "print -s"
> >> command.
> >> 
> >> Finally, on logout, pipe the output of "fc -ln 1"
> through a
> >> program
> >> which uses the same password entered at login time
> to
> >> encrypt the
> >> history and write it to the ~/.ehistory file.
> >> 
> >> Can any of you see any reason for why this would
> not work?
> >> 
> >> Or alternatively, is there perhaps a better way to
> do this
> >> within zsh?
> >> 
> >> Thanks in advance.
> >>   
> >> 
> >> -- 
> >>  Lloyd Zusman
> >>  ljz@xxxxxxxxxx
> >>  God bless you.
> >> 
> >> 
> >
> >
> >       Get your new Email
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> >
> 
> -- 
>  Lloyd Zusman
>  ljz@xxxxxxxxxx
>  God bless you.
> 
> 


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