Package: emacs24-el
Version: 24.5+1-3
Severity: normal
Tags: upstream
Control: forwarded -1 https://debbugs.gnu.org/20133
When composing a message with an Fcc: line in emacs message-mode, if
the message has any cryptographic operations set on it
(e.g. mml-secure-message-sign-pgpmime, or
mml-secure-message-encrypt-pgpmime), then those operations are done
distinctly for the message sent via the mail system and the message
stored in Fcc.
This means a few things:
a) the message body stored in the folder is not a "carbon copy" of
the message sent to the mail system (surprising!)
b) Fcc'ed messages must invoke two signatures: once for sending and
once for storing in Fcc. (cryptographically sketchy! why sign
the same document twice?)
c) When using a smartcard or prompting for each signature via
ignore-cache-for-signing in gpg-agent.conf, the user must trigger
the signature twice (inconvenient)
d) any encryption choices that require manual intervention (like key
selection, see https://bugs.debian.org/745553) must be done
multiple times as well (more inconvenience)
In the event that some crypto scheme is created which keeps
coordinated peerwise state of all messages sent (e.g. an axolotl
rachet for mail), duplicating a single message like this could
introduce weird out-of-sync states.
The report has already been reported upstream at
https://debbugs.gnu.org/20133 where i've added some commentary, but
it's not clear to me how to subscribe to that BTS, and no upstream
action has been taken in 6 months (not even a reply).
Any suggestions on how to fix this for users of Fcc with cryptographic
settings would be welcome.
Alternately, if the answer is "don't use Fcc with cryptographic
message-modes", it would be good to provide that warning as well.
--dkg
-- System Information:
Debian Release: stretch/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'testing'), (200, 'unstable'), (1,
'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages emacs24-el depends on:
ii emacs24-common 24.5+1-3
emacs24-el recommends no packages.
emacs24-el suggests no packages.
-- debconf-show failed
