#3742: Handle 'corrupted' (multipart/mixed) PGP-MIME bodies
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Reporter: Feandil | Owner: mutt-dev
Type: enhancement | Status: new
Priority: minor | Milestone:
Component: mutt | Version:
Keywords: |
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Some clients/server combinations seems to have an issue with PGP-MIME
formatting.
Instead of having an application/pgp-encrypted and an application/octet-
stream parts wrapped in a multipart/encrypted message, the message they
are sending put these two parts (in a base64-encoded format), after an
empty text/plain part, in an multipart/mixed body.
Instead of:
<multiplart/encrypted>
* <application/pgp-encrypted>
* <application/octet-stream>
They contain:
<multiplart/mixed>
* <text/plain>
* <application/pgp-encrypted> [BASE64-encoded]
* <application/octet-stream> [BASE64-encoded]
Such a problem, which seems at least to be produced when the Apple mail
client is used with Exchange servers, has been described (and sometime
fixed) in other threads:
- http://sourceforge.net/p/enigmail/bugs/384/
- http://www.gossamer-threads.com/lists/gnupg/users/55862
- https://groups.google.com/forum/#!topic/comp.mail.mutt/AHmenhyjcN4
I believe that mutt could deal with it and I wrote a prototype patch
(against the heavily patched gentoo version, sorry) which make such emails
directly readable by mutt.
The idea behind this prototype patch is to:
- Rewrite the MIME body in a way mutt understand
- Add Base64 decoding capability in pgp_decrypt_part (pgp.c)
The rewriting changes:
<multiplart/mixed>
* <text/plain>
* <application/pgp-encrypted> [BASE64-encoded]
* <application/octet-stream> [BASE64-encoded]
Into:
<multiplart/mixed>
* <text/plain>
* <multiplart/encrypted>
* <application/pgp-encrypted> [BASE64-encoded]
* <application/octet-stream> [BASE64-encoded]
I was not able to add Base64 decoding capability to pgp_decrypt_part
without duplicating code from the decode64 function already present in
mutt that deals with STATE).
This patch has been sent to mutt-dev, with no comment so far
--
Ticket URL: <http://dev.mutt.org/trac/ticket/3742>
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