Is it possible to encrypt file symmetrically with 1 (one) command line?

[Chris De Young]

On Thu, Sep 30, 2004 at 11:25:33PM +0200, Oleksiy Muzalyev wrote:
> Hi,
> 
> When I enter:
> gpg -a -c data.php
> 
> gpg asks for the password, I enter it, and it asks to repeat.
> 
> Is there something like:
> 
> gpg -a -c data.php --password MyPassword
> 
> I call from VB2005:
> 
> Shell("c:\gnupg\gpg.exe -a -c " & fileToEncrypt, AppWinStyle.NormalFocus)
> 
> And console window opens and asks twice for the password.
> 
> I would prefer to send the file path and password in one command.

Offhand I don't know of any switches that you can use to pass the
passphrase on the command line, though I might be missing one.  If
it's acceptable to store the passphrase in a separate file (probably
no more risky that coding it into a script), you could use:

gpg -a -c --batch --passphrase-fd n filename

which will read the password from file descriptor n.  0 means standard
input, though that's not what you want in the case.

Cheers,
-Chris
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