On Sun 2015-03-01 20:01:05 +0100, Werner Koch wrote: > On Sun, 1 Mar 2015 15:32, rp...@kcore.de said: > >> is there a command line utility that takes a PGP/MIME encrypted message >> (a plain RFC 2822 text file) and outputs an unencrypted copy? The > > Not really. MIME is a structured format and as such it may result in a > bunch of encrypted, non-nencrypted, signed, unsigned, > message/alternative sub-documents. Thus it is not easy to write a > general purpose command line tool.
python's email module is quite good for programmatically handling mime parts if you want to manipulate an e-mail (though it may not be so good for reconstructing it in some sort of bytewise exact fashion). > You may start with gpgparsemail which is not installed bald build as > part of gnupg in the tools directory. It returns an annotated format > which might be easier for further processing steps than plain MIME. > > If you only want to decrypt a standard MIME encrypted mail, it is easy. > Simply pipe the entire mail through gpg and you will get the decrypted > MIME container. You should also note that any decryption like this is likely to remove any OpenPGP signature as well, for those MUAs that do the encryption+signing step all in one OpenPGP piece (i believe that the gpgtools mail.app plugin places the OpenPGP signature inside a multipart/signed MIME message, which is then itself encrypted, rather than placing encryption and signatures all in the OpenPGP part directly). A tool that transforms an OpenPGP encrypted+signed MIME message into an OpenPGP-signed MIME message while retaining the original signature would be a really nice tool to have. --dkg _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
