[OTR-dev] gaim-OTR, AIM DirectIM, and messaging signals

[Evan Schoenberg]

(Please reply-to-all, as I'm sending this to both relevant lists)

AIM DirectIM can't work within an OTR-encrypted chat; the same is  
true of any other gaim plugin-based encryption scheme.

1) User sends message in Gaim
2) Gaim gives plugins an opportunity to modify the message; an  
encryption plugin such as gaim-otr encrypts the message if  
appropriate, returning the encrypted message
3) Gaim sends the encrypted message to the prpl
4) In the case of oscar within a DirectIM session, the message is  
normally post-processed, looking for <IMG> tags, which reference ids  
from the gaim img store in the form <img='2'> where gaim_imgstore_get 
(2) will return the GaimStoredImage* for the image.  The image's  
data, size, etc. are inserted into the message..... but the message  
is encoded, so such a tag isn't found, and images can not be sent.

A similar situation exists on the receiving side, where the prpl  
processes the incoming message, looking for <img> tags to convert to  
the gaim img store and their corresponding IDs but sees only the  
gibberish of an encrypted message.

As I mentioned, this is not specific to the gaim-otr implementation  
but rather a result of how the signals are set up.  One solution I've  
come up with is giving the prpl a chance to modify the outgoing  
message before it is sent to plugins via a signal, and similarly call  
the prpl for final post-processing of incoming messages after the  
first signal is sent when receiving a message.

Thoughts?

Cheers,
Evan
www.adiumx.com
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