signalbackup-tools: [Error]: Failed to get valid frame from decoded data...

[XSm2i]

Is there an existing issue for this?

• I have searched the existing issues

Bug description

https://github.com/bepaald/signalbackup-tools

I get this error when decoding a backup created by version v7.13.4-1 & v7.17.5-1. I haven't tested earlier versions.

Reading backup file: 099.6%...
[Error]: Failed to get valid frame from decoded data...
Data was verified ok, but does not represent a valid frame... Don't know what happened, but it's bad... :(
Decrypted frame data: (hex:) 1a ... 00
[Warning]: SKIPPING INVALID FRAME!
Reading backup file: 100.0%... done!
Database version: 247

It doesn't make a difference if I disable the passphrase lock, the result is the same. Upstream backups decode without issue.

Backups reporting the valid frame issue restore fine (in my limited testing) on upstream installs.

Steps to reproduce

Register a fresh install, create a backup, decode it.

Molly version

7.17.5-1

Android version

No response

Device

No response

Link to debug log

No response

[XSm2i]

One thing I neglected to say is that to replicate you need to enable the passphrase lock before registration. If you don't, this issue doesn't occur. So something irreversible happens.

As I said, if you disable it after registration the issue is still present.