297314 - Allow detach/delete of attachments in signed/encrypted messages by unencrypting message

Status: NEW

(MailNews Core :: Attachments, enhancement)

Description

[David :Bienvenu]

spun off from bug 288273. We'll need to warn the user that the message will be
unencrypted, and allow them to turn off that warning.

Comment 1

[Magnus Melin [:mkmelin]]

*** Bug 323760 has been marked as a duplicate of this bug. ***

Comment 2

[Christian Schmidt]

Duplicate of bug 288700 ?

Comment 4

[Nelson Bolyard (seldom reads bugmail)]

This bug overlaps bug 288700.  That bug discusses detaching from messages 
that are signed, and explains that the signature must be removed.
This bug discusses detaching from messages that are encrypted, or signed
and encrypted, and suggests that the message must be stored unencrypted.
(Actually, that's not exactly true.  It is often possible to re-encrypt 
the edited result.)  

I would suggest that there is one common solution to both issues, one that
removes both signatures and encryption from messages when detachment is done.

There is a proposed UI dialog to handle both cases in bug 288273 comment 8 
and in bug 288700 comment 11.

Comment 6

[Andrew]

All items extra to the message should be treated as attachments.
This solution would give the control to the user, and avoid behaviour one does not expect.

Those, who wish to remove also the certificate, should be able to do so.

Those people, who wish to remove an attached picture, but retain the certificate, should be able to do so. If the certificate loses its integrity, it is a consequence they must put up with.

The residual text of notice might contain an additional explanation, that the signature is no longer valid because this attachment is removed. One explanation per message. No duplicates please.

I would also add an option to remove the residual text of notice after removal of attachments. But that can be achieved by simply copying or forwarding the text.

Comment 7

[wroot]

Andrew, i agree on all points, but i would give the priority to: allow to remove the attachments no matter the consequences.