export-minimal doesn't affect export-secret-key?

[Peter Lebbing]

I just found out that the following two commands are equivalent:

> $ gpg2 -o full.gpg --export-secret-keys ac46efe6de500b3e
> $ gpg2 -o minimal.gpg --export-options export-minimal --export-secret-keys ac46efe6de500b3e
> $ ll
> total 104
> -rw------- 1 peter peter 50731 Feb 22 14:00 full.gpg
> -rw------- 1 peter peter 50731 Feb 22 14:00 minimal.gpg
> $ gpg2 --version
> gpg (GnuPG) 2.1.18
> libgcrypt 1.7.6-beta
> [...]

I thought "well this is surely a bug in the new 2.1, what with the new
secret key storage". But:

> $ gpg -o full.gpg --export-secret-keys ac46efe6de500b3e
> $ gpg -o minimal.gpg --export-options export-minimal --export-secret-keys ac46efe6de500b3e
> $ ll
> total 88
> -rw-r--r-- 1 peter peter 41465 Feb 22 14:02 full.gpg
> -rw-r--r-- 1 peter peter 41465 Feb 22 14:02 minimal.gpg
> $ gpg --version
> gpg (GnuPG) 1.4.18
> [...]

And now I'm confused... surely export-minimal is useful when backing up
your secret key and storage is limited? We just encountered this with
the paperbackup.py thread...

This works fine, BTW:

> $ gpg2 -o minimal.gpg --export-options export-minimal --export ac46efe6de500b3e$ ll
> total 56
> -rw-r--r-- 1 peter peter 50631 Feb 22 14:06 full.gpg
> -rw-r--r-- 1 peter peter  2623 Feb 22 14:06 minimal.gpg

Cheers,

Peter.

-- 
I use the GNU Privacy Guard (GnuPG) in combination with Enigmail.
You can send me encrypted mail if you want some privacy.
My key is available at <http://digitalbrains.com/2012/openpgp-key-peter>

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