ncrypt/crypt.c: Read the protected Message-ID

[alejandro-colomar]

trafficstars

I've seen some messages sent with thunderbird(1) which protected the Message-ID field. Let's read it if it's there.

Tested with an old mail I had in my mailbox:

...

[-- Begin signature information --]
Good signature from: Alejandro Colomar <[email protected]>
                aka: Alejandro Colomar <[email protected]>
                aka: Alejandro Colomar Andres <[email protected]>
            created: Thu Dec 22 15:11:26 2022
[-- End signature information --]

[-- The following data is signed --]
From: Alejandro Colomar <[email protected]>
To: Deri <[email protected]>
Subject: Re: The Linux Manpages Book - Happy Christmas
Message-ID: <[email protected]>
References: <1842694.tdWV9SEqCh@pip>
In-Reply-To: <1842694.tdWV9SEqCh@pip>

[-- Attachment #1 --]
[-- Type: text/plain; charset=UTF-8, Encoding: base64, Size: 8.0K --]

...

[alejandro-colomar]

BTW, I tried protecting this field in the past, but it's non-trivial, since it's not yet generated at the time we protect the fields, IIRC.