[Users] [Bug 3430] New: The PGP/MIME plugin cannot decrypt messages broken by Microsoft Exchange

[noreply at thewildbeast.co.uk]

http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3430

            Bug ID: 3430
           Summary: The PGP/MIME plugin cannot decrypt messages broken by
                    Microsoft Exchange
    Classification: Unclassified
           Product: Claws Mail
           Version: GIT
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: Plugins/Privacy
          Assignee: users at lists.claws-mail.org
          Reporter: rca at psy-q.ch

The PGP/MIME plugin gets (rightfully) confused when it encounters a PGP/MIME
message that was broken by Microsoft Exchange. The problem in the server is
well-known since 2008 [1].

The Enigmail team handles this issue by detecting whether it's looking at such
a broken message and decrypting the correct part. It even offers to repair the
message for the user, so that it gets stored in a proper fashion. The code for
detecting is in Enigmail's enigmailConvert.jsm [2].

Maybe the PGP/MIME plugin could be extended to show the same behavior? I would
start myself, but my last contact with C was in 1996 and I surely won't let
that anywhere near privacy-related code :)


[1]
https://social.technet.microsoft.com/Forums/en-US/0f90b1be-6e7e-4658-b577-2bcfec02f7c9/exchange-2007-messes-up-pgp-encrypted-messages?forum=exchangesvrsecuremessaginglegacy

[2]
http://sourceforge.net/p/enigmail/source/ci/master/tree/package/enigmailConvert.jsm

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