1743726 - OpenPGP email from Apple Mail not rendered in Thunderbird 91.3

Status: RESOLVED DUPLICATE of bug 1739577

(MailNews Core :: Security: OpenPGP, defect, P1)

Description

[Kai Engert [:KaiE:]]

I'm receiving emails from the Apple Mail client with an OpenPGP signature, that aren't rendered by Thunderbird.

The message content area remains empty.

I'll attach sample messages. I think the reason is that the message uses quoted printable encoding, and the boundary containing an = character.

Comment 1

[Kai Engert [:KaiE:]]

Attachment: empty.eml

This is the simplified version of a real message that I have received.

Comment 2

[Kai Engert [:KaiE:]]

Attachment: empty2.eml

This is a slight variation of the sample message, showing a completely different behavior/bug.

The original message contained two newlines between the head and the message body section.
This is a modified message, that simply removed one of the newlines.

When opening this message with Thunderbird 91.3, the message contents are shown, including the openpgp digital signature, including the boundary line with a garbage character (looks like incorrect decoding of the = character in the boundary line).

Comment 3

[Kai Engert [:KaiE:]]

Attachment: empty3.eml

This is a manually constructed email based on the first message.

I was trying to find out if the problem is inside Thunderbird's OpenPGP handling, or rather in a more general place.

The message here is multipart/alternative, with QP encoding.

The message renders correctly in TB 91.3, so I conclude the boundary line is handled correctly outside of the OpenPGP code.

Comment 4

[Kai Engert [:KaiE:]]

Not a new bug, I can reproduce using Thunderbird 78.14, too.

Comment 5

[Magnus Melin [:mkmelin]]

Bug 1739577?

Comment 6

[Kai Engert [:KaiE:]]

Yes looks like a duplicate, thanks, glad to hear it isn't a bug on our side.