XML output format - Githubissues

xeals / signal-back

Decrypt Signal encrypted backups outside the app

Apache License 2.0

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XML output format #3

Closed xeals closed 6 years ago

xeals commented 6 years ago

SMS Backup & Restore is a popular app for backing up the system SMS database, and Signal used to be able to produce outputs compatible with it. This will probably be my first endeavour.

[x] Parse SMS and MMS transactions
[x] Write SMS instances
[ ] Write MMS instances
[ ] Write MMS attachments?
[x] SMS Backup & Restore can actually fully restore the SMS database with it

xeals commented 6 years ago

3c02d0a503c5caa3c9b2da40e5df621553bafba6 fixes type exports, so now the database is actually revivable.

Biggest issue that I can see at the moment is that timestamps are a bit broken.

DaveKap commented 6 years ago

Since MMS isn't being written, does that explain why my 220MB backup only gets decoded into a 5MB backup?

xeals commented 6 years ago

It would be a primary reason, yes. MMS -- even their textual components -- aren't currently being used.

DaveKap commented 6 years ago

Okay. I tried to merge the backup and so very little of it actually transferred I wasn't sure what was going on. I'll do it again and see if it works but otherwise I'll write a new ticket for help figuring out what's going wrong.

timewasted commented 6 years ago

I just wanted to drop a line to say that I'm working on adding support for MMS and their attachments. The code is mostly written and I'm currently playing with it locally to see what issues crop up. Once I'm reasonably happy with things I'll send you a pull request.

DaveKap commented 6 years ago

Thank you! I'm looking forward to it, as I'd like to finally uninstall signal after merging its entire history with my normal messenger.

timewasted commented 6 years ago

No need to thank me, especially since you did all the hard work. I'm just doing a bit of minor plumbing, since you already had most of the pieces available.

The only thing that I haven't been able to figure out is how to make MMS that you sent not show "From: Hidden sender address" when viewing the message info in Android Messages. As much as it offends my desire to have everything pristine, I'm unlikely to spend (much) more time chasing it down since SMS Backup and Restore backing up and then restoring to Android Messages has the same behavior.

I'm doing one last restore of my 399MB Signal backup (which is 528MB in XML format) to check for any last issues, then I'll push everything up. Unfortunately my guinea pig device is a SLOW Nexus 4, so it'll be restoring for a while. I don't expect any issues, though!

DaveKap commented 6 years ago

I haven't done any work at all other than failing to merge my signal history.

timewasted commented 6 years ago

Hah, I totally spaced out on who I was replying to. Oh well.

@xeals I created a pull request to add MMS support: #32

brightbluejay commented 5 years ago

Hi, is this fixed? I'm having just a 1kb file output in XML and no messages in the file? CSV export works though.

signal-back v0.1.6 proto commit: d6610f0

Thank you