Back story: There are starting to be a few decent crypto apps, desktop and mobile, that put a pretty face on OpenPGP encrypt/decrypt/verify/key-management. I posted a couple example screencasts in https://www.youtube.com/channel/UCZYI0JHoJCILEegRJsWufXQ
On Android, it would make it easier to stitch these things together if there were a way you could ask the system “Here's a PGP message, identified by media type, are there any apps registered to handle that media type?” Typically, everything is ASCII-armored.
By PGP message, I mean the bits betweeen
-----BEGIN PGP MESSAGE-----
and
-----END PGP MESSAGE-----
RFC 3156 registers application/pgp-encrypted but only as a part of a multipart/encrypted top-level media type, so it wouldn’t be appropriate to use that (I think).
So:
1. Am I missing something? Is there a media-type suitable for standalone ASCII-armored PGP messages?
2. If not, would it be a sane idea to register such a media type? It would make life easier anywhere that dispatching by media type is used.
Assuming this is sane, I’d be happy to cook up a draft.