Created
August 3, 2017 21:31
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Extracting and repackaging an android backup file
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| adb backup --noapk <your_apk_package_name> | |
| #extract it, skipping the first 24. we'll use them later though, so keep the files | |
| dd if=backup.ab bs=24 skip=1 | /usr/local/ssl/bin/openssl zlib -d > backup.tar | |
| # do some stuff with it ... | |
| #then repackage everything | |
| /usr/local/ssl/bin/openssl zlib -e < ./newbackup.tar | dd of=newbackup.ab bs=24 seek=1 | |
| #reapply the first 24 bit to the file | |
| dd if=mybackup.ab bs=24 count=1 | dd of=backup.ab bs=24 conv=notrunc | |
| adb restore newbackup.adb #and confirm on the device |
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I might be able to use this if it accepted the desktop backup password set on the device.