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From: Florian Weimer <fw@s.netic.de>
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Subject: Re: MML, message-send-hook and automatically GnuPG-signing messages.
Date: 18 Jan 2000 12:39:12 +0100
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Jonas Steverud <d4jonas@dtek.chalmers.se> writes:

> > <#multipart type=signed>
> [...]
> 
> How can I ensure that this will be expanded _last_? Signing and
> encrypting demands that it is done last.

Look at the code.  It compiles the contained MML directives and, as a
result, gets the raw representation of the contained parts.  After that,
you can calculate signatures, encrypt it, in short: do whatever you want.

I don't think an additional hook is required, in fact, I would be
surprised. ;)

You only need additional data structures for decrypting and verifying
signatures.

But the whole discussion is unnecessary at the moment.  There is no
safe way to invoke PGP or GnuPG from Emacs on most systems (at least
on all I tested except Solaris), so it's probably not very wise to use
Mailcrypt and similar packages on a multi-user machine.