[ TOOL - Python2/3 ] UPDATE.APP Img Extractor - splituapp - Android

Disclaimer: I am not responsible for anything bad that may occur from the use of this tool, but I will take all the credit you can give me if it works for you
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splituapp is similar to splitupdate.pl and split_updata.pl for unpacking/splitting/extracting img files from an UPDATE.APP file. The main difference being this one is written for Python2/3 instead of Perl. Additionally, splituapp allows you to extract specified img files where the others will only extract all img files at once. This saves a lot of time if you know which img files you want.
Assuming splituapp and UPDATE.APP are in the same directory and you have a command prompt open in that directory, here are some examples.
To extract all img files:
Code:
splituapp -f UPDATE.APP
To extract only system.img and boot.img:
Code:
splituapp -f UPDATE.APP -l system boot
You can run "./splituapp -h" (Linux) or "python splituapp -h" (Windows) to get usage instructions.
Like splitupdate.pl and split_updata.pl, splituapp will do crc checksum verification on the img files after extraction if the crc binary is in the same directory the script is run from. Unfortunately I do not have the source for the binary so it is only available for Linux at this time. As a result, the crc verification will be disabled in Windows for now.
This program does not extract the images it splits from UPDATE.APP. Once the img files are split from UPDATE.APP the job is complete. If you are looking for a tool to handle system.img extraction you can check out SuperR's Kitchen.
splituapp Download/Source
Enjoy
Credits:
I am not sure who did what, but thanks
McSpoon, JoeyJiao, ZeBadger - for the data_structure file in splitupdate.pl and the crc binary for Linux

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reserved

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Updated.
Changes:
Improved argument parsing by adding -f and -l switches.
Improved the help output.
NOTE: Make sure you check the command syntax, it has changed.

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CRC errors
Hi,
when extracting the UPDATE.APP of BKL-L09C432-9.0.0.178(C432E4R1P12) I have CRC errors like:
Code:
$ ./splituapp -f UPDATE.APP -l recovery_ramdisk
Extracting recovery_ramdisk.img ...
Calculating crc value for recovery_ramdisk.img ...
ERROR: crc value for recovery_ramdisk.img does not match
Doing all this on Ubuntu 18.04.2 (Kernel 4.20).
Can I trust the extracted images?
Update: After a crosscheck with the use of "split_updata" and hashing both extracted recovery_ramdisk and following use of the extracted .img with Magisk to root my Honor V10, I can confirm that the image was correct even with the CRC-error.

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Updated.
Changes:
Check for files with duplicate names in UPDATE.APP and append file names with _2 to avoid overwriting the first.
Do not read entire file into ram before writing it. This will help PCs with less ram to extract large files.
General code cleanup.

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Hello
You are talking about the new encryption EROFS I updated my huawei p10 EMUI 9.1 to latest version i unlocked the bootloader trying to flash Chinese firmware on it then it bricked no sign of power but my pc recognise it in Fastboot I downloaded a file from xda named p10 revive which includ the flashing firmware. but the partitions are not flashing even if I flash it individually please can some one help and show me how to RW the partition from RO please
SuperR. said:
Updated.
Changes:
Check for files with duplicate names in UPDATE.APP and append file names with _2 to avoid overwriting the first.
Do not read entire file into ram before writing it. This will help PCs with less ram to extract large files.
General code cleanup.
Click to expand...
Click to collapse
Can you please help with how to bypass EROFS because my phone bricked and it's not sending the cust, system, vendor ....etc when I flashed please enligh me on how to RW the EMUI 9.1 partitions