Bug#1050915: truncate unsigned parts of signed mails to d-d-a

2023-09-03 Thread Don Armstrong
severity -1 wishlist
thanks

On Thu, 31 Aug 2023, Lee Garrett wrote:
> currently, when using Thunderbird to send OpenPGP/MIME signed mails to
> d-d-a, the mail gets silently blackholed (#1050906). It seems like the
> reason is that there is a small piece of text before the actual
> MIME-encoded data:
> 
> "This is an OpenPGP/MIME signed message (RFC 4880 and 3156)"
> 
> Would be nice if the tool in question could just truncate the unsigned bits
> instead and accept the mail, assuming there's a valid signature.

The problem there is that we would break DKIM or oversigning of the mail
message if we stripped that out. [It also adds a whole bit of
complicated code to the signature verification tool which is likely to
be wrong.]

The real fix is for thunderbird to stop adding unsigned text before the
actual mime encoded data. It doesn't add any value whatsoever. [It's one
of the only e-mail clients which does this that I'm aware of.]

-- 
Don Armstrong  https://www.donarmstrong.com

Thanks be to God, that he gave me Stubbornness, when I know I am right.
 -- John Adams (Letter to Edmund Jennings, 27 September 1782)



Bug#1050915: truncate unsigned parts of signed mails to d-d-a

2023-08-31 Thread Lee Garrett
Package: lists.debian.org
Severity: normal
X-Debbugs-Cc: deb...@rocketjump.eu

Hi,

currently, when using Thunderbird to send OpenPGP/MIME signed mails to d-d-a,
the mail gets silently blackholed (#1050906). It seems like the reason is that
there is a small piece of text before the actual MIME-encoded data:

"This is an OpenPGP/MIME signed message (RFC 4880 and 3156)"

Would be nice if the tool in question could just truncate the unsigned bits
instead and accept the mail, assuming there's a valid signature.

Greetings,
Lee