This is used by current Huawei Backup application (kobackupdec project on github is quite new). As opposed to standard google backup Huawei Backup allows you to backup not only your apps but also their data. This backup can be created on external USB OTG or directly to PC using Huawei HiSuite program. The encryption method used by this app changes a bit between different versions of Huawei Backup application (called also kobackup). The algorithm mentioned above is the current one. There is a blog article at http://blog.digital-forensics.it/2019/07...yptor.html that can introduce some more details. I can provide you with some samples of info.xml files and modified kobackupdec python script that check if the password for the backup is correct. I was not testing this app on other android phones than Huawei's but it is available in play store and other apk mirror sites.
In current Huawei Backup app the minimum password lenght is 8 characters and has to include letters and digits. In previous versions of this app the user had the option not to provide backup password by that time also the minimum password lenght was 4 characters.
It is preinstalled on all modern Huawei smartphones.
In the latest version of this app it no longer appear as separate app and it is rechable via settings where standard android/google backup is.
In current Huawei Backup app the minimum password lenght is 8 characters and has to include letters and digits. In previous versions of this app the user had the option not to provide backup password by that time also the minimum password lenght was 4 characters.
It is preinstalled on all modern Huawei smartphones.
In the latest version of this app it no longer appear as separate app and it is rechable via settings where standard android/google backup is.