passphrases in batchmode

[Jack McKinney]

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Big Brother tells me that Mark Koek wrote:
> Hello all,
>=20
> Something I've been unable to find in the documentation is how to feed
> gpg a passphrase from a script (i.e., without having to enter it on the
> command line).
>=20
> I can do this with PGP ("pgp +batchmode -z$pwd"), but I'd prefer to use
> GnuPG.
>=20
> But how?

    You can pass it on a file descriptor.  With zsh, this can easily
be done from the command line:

gpg --passphrase-fd 3 -c 3<<< "My passphrase" < unencrypted > encrypted

    If your file does not need to be piped, then you could use:

echo "My passphrase" | gpg --passphrase-fd 0 -o encrypted -c encrypted

    I haven't tried this, though, as with zsh it is not necessary.

--
"In God We Trust.                   Jack McKinney
 Everyone else we monitor."         jackmc@lorentz.com
     -Former NSA employee           http://www.lorentz.com
1024D/D68F2C07 4096g/38AEF076

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