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Save topin89/b109342b135649bf8c2e405a6ae79a39 to your computer and use it in GitHub Desktop.
# For modern LG backup files use a script from here: https://github.com/Mysak0CZ/LBFtool | |
# with details from there https://forum.xda-developers.com/android/general/tool-lg-restore-com-lge-bnr-lbf-file-t4053579 | |
# Fair warning, this script was designed for really old version of LGBackup and won't work on with new devices | |
# So, if you don't get what you wanted, try to use every data carving tools you can get | |
# | |
# Also, good person with nickname SEVENTY ONE recommends ExtractJPEG( https://www.gunamoi.com.au/soft/extractjpeg/download.html ) | |
# To, well, extract JPG Images from a backup | |
# 0. You will need 7-zip context menu "Extract here". | |
# 1. Edit filename to your backup file | |
# 2. Run this script from same folder | |
# 3. Select all *.brokenscript and choose 7-zip > Extract here | |
# 4. On overwrite request, choose either "Yes to all" or "No to all", id doesn't matter | |
# 5. Ta-da! You just got your files. | |
# 6. Most .db files are in fact SQLite DBs, you can open 'em with SQLiteStudio | |
# 7. Sms/sms.vmsg you can read here: http://sms-vmsg.org/sms-reader-app/free-app/ | |
# 8. Guess you can import SMS and MMS to your phone with this app (I don't know, It was friend's backup) https://play.google.com/store/apps/details?id=com.aoe.vmgconverter&hl=ru | |
# 9. All else, I don't know | |
# 10. May google be with you | |
import mmap | |
index=0 | |
filename=f"LGBackup_xxxxxx.lbf" | |
def read_in_chunks(file_object, chunk_size=1024): | |
"""Lazy function (generator) to read a file piece by piece. | |
Default chunk size: 1k.""" | |
while True: | |
data = file_object.read(chunk_size) | |
if not data: | |
break | |
yield data | |
def find_in_file(f,signature, startpos): | |
prev=b'' | |
chunk_size=2**20 | |
for i,cur in enumerate(read_in_chunks(f,chunk_size)): | |
searchee=prev+cur | |
pos=searchee.find(signature) | |
if pos>=0: | |
return i*chunk_size+pos-len(prev)+startpos | |
prev=cur | |
else: | |
return -1 | |
with open(filename,"rb") as backup: | |
starpos=0 | |
while True: | |
pos=find_in_file(backup, b'PK\x03\x04',starpos) | |
if pos<0: | |
break | |
print(backup.tell()) | |
backup.seek(pos) | |
print(backup.tell()) | |
index+=1 | |
filename=f"{index}.brokenzip" | |
with open(filename,"wb") as nextfile: | |
for chunk in read_in_chunks(backup,2**20): | |
nextfile.write(chunk) | |
starpos=pos+1 | |
backup.seek(starpos) | |
print(backup.tell()) | |
print() |
# For modern LG backup files use a script from here: https://github.com/Mysak0CZ/LBFtool | |
# with details from there https://forum.xda-developers.com/android/general/tool-lg-restore-com-lge-bnr-lbf-file-t4053579 | |
# Fair warning, this script was designed for really old version of LGBackup and won't work on with new devices | |
# So, if you don't get what you wanted, try to use every data carving tools you can get | |
# | |
# Also, good person with nickname SEVENTY ONE recommends ExtractJPEG( https://www.gunamoi.com.au/soft/extractjpeg/download.html ) | |
# To, well, extract JPG Images from a backup | |
# 0. You will need 7-zip. | |
# 1. Find 7z.exe in a 7-zip folder in Program Files (or whenever you install it) and copy it to a folder with the script | |
# 2. Edit filename to your backup file | |
# 3. Run this script from same folder | |
# 4. Wait a bit (maybe a lot). New subfolder "restored" should appear. | |
# 5. Ta-da! You just got your files. | |
# 6. Most .db files are in fact SQLite DBs, you can open 'em with SQLiteStudio | |
# 7. Sms/sms.vmsg you can read here: http://sms-vmsg.org/sms-reader-app/free-app/ | |
# 8. Guess you can import SMS and MMS to your phone with this app (I don't know, It was friend's backup) https://play.google.com/store/apps/details?id=com.aoe.vmgconverter&hl=ru | |
# 9. All else, I don't know | |
# 10. May google be with you | |
import mmap | |
from os import system, remove | |
filename=f"LGBackup_xxxxxx.lbf" | |
filename_output=f"one_and_only.brokenzip" | |
def read_in_chunks(file_object, chunk_size=1024): | |
"""Lazy function (generator) to read a file piece by piece. | |
Default chunk size: 1k.""" | |
while True: | |
data = file_object.read(chunk_size) | |
if not data: | |
break | |
yield data | |
def find_in_file(f,signature, startpos): | |
prev=b'' | |
chunk_size=2**20 | |
for i,cur in enumerate(read_in_chunks(f,chunk_size)): | |
searchee=prev+cur | |
pos=searchee.find(signature) | |
if pos>=0: | |
return i*chunk_size+pos-len(prev)+startpos | |
prev=cur | |
else: | |
return -1 | |
def unpack_brokenzip(filename_output): | |
system(f"7z x -aou -orestored {filename_output}") | |
with open(filename,"rb") as backup: | |
starpos=0 | |
while True: | |
pos=find_in_file(backup, b'PK\x03\x04',starpos) | |
if pos<0: | |
break | |
backup.seek(pos) | |
print(backup.tell()) | |
with open(filename_output,"wb") as nextfile: | |
for chunk in read_in_chunks(backup,2**20): | |
nextfile.write(chunk) | |
unpack_brokenzip(filename_output) | |
starpos=pos+1 | |
backup.seek(starpos) | |
remove(filename_output) |
# For modern LG backup files use a script from here: https://github.com/Mysak0CZ/LBFtool | |
# with details from there https://forum.xda-developers.com/android/general/tool-lg-restore-com-lge-bnr-lbf-file-t4053579 | |
filename="LGBackup_xxxxxx.lbf" | |
filename_out="LGBackup_xxxxxx_headers_only.lbf" | |
CHUNK_LENGTH=4096 | |
HEADER=b'PK\x03\x04' | |
with open(filename,"rb") as backup, open(filename_out,"wb") as newfile: | |
window=bytearray(backup.read(CHUNK_LENGTH*2)) | |
while window: | |
header_pos=window.find(HEADER) | |
if header_pos > -1: | |
newfile.write(b'0'*header_pos+HEADER) | |
del window[:header_pos+4] | |
elif len(window)>CHUNK_LENGTH: | |
newfile.write(b'0'*CHUNK_LENGTH) | |
del window[:CHUNK_LENGTH] | |
else: | |
newfile.write(b'0'*len(window)) | |
del window[:] | |
window+=bytearray(backup.read(CHUNK_LENGTH)) |
You're welcome
How long does this take? I have been sitting here for a while, and it seems to just keep going and going...
It should not have be this long. Strange. If you have more RAM than size of a backup, try first revision. If not, write me directly to topin89@mail.ru, I will try to help.
New script, zip_anonymizer.py
If lbf_extractor.py is not working, you can run backup through zip_anonymizer.py and send me result. It basically replaces everything except ZIP header with '0' (not '\0').
Then you can zip this new file and send it to me so I can actually improve my code.
New script, lbf_extractor_unpacker.py
It should unpack all files by itself, but it requires "7z.exe" to be in the same folder with it. It should be in 7-Zip folder in Program Files. You can also add 7z.exe to your PATH env variable. On Debian or Ubuntu, you can just install p7zip-full. On anything else, I sincerely don't know.
Great work topin89!
I was looking for a way to get the databases of LG Health app. Now I got it thanks to you. ;-)
I edited it using "DB Browser for SQLite" and tried to get it back on my LG G6 using LG UP. But LG UP throw the error that the backup file is defective. I guess it's about the missing "broken zip" files, which I can not recreate from my extracted and modified files.
So question is: How do I get the database file(s) back to the smartphone without LG UP complaining about "defctive backup files"?
Do you got any idea or even a script already for processing the vice versa way to your scripts?
Cheers
Thanks, @MrSALSA
Sorry, but I don't know how to recreate backup files. I made this for a friend with new LG that was not compatible with old backups for some reason (or we didn't get how to use it), so there was no reason to examine how it works in full, just how to extract.
If you need to just edit db of an app, best thing I can suggest is edit via something like this (root required)
https://play.google.com/store/apps/details?id=com.ksk.sqliteeditor
or via ADB shell from Android SKD, as suggested here:
https://android.stackexchange.com/questions/41353/android-manually-alter-the-contents-of-an-apps-database
Thanks, for reply topin!
I'll write you a messege to explain my problem furtherly. I guess it's to boring to other users... ;-)
Cheers
Hello, @topin89
Recently I've done a bit of digging into lbf files and here are my findings (including extract tool), if you are interested.
https://forum.xda-developers.com/android/general/tool-lg-restore-com-lge-bnr-lbf-file-t4053579
Hello, @Mysak0CZ
Holy cow!
Well, I don't really interested in development, but I'm sure as hell I'll link give a link in all files in this gist! I also recommend to make a gist for your script. At least three persons got me directly from here, not from the XDA thread. Repo would be even better.
Edit: "HP" Replaced with "LG". I guess I'm actually tired now.
My script, I did it to restore notes of my friend from some LG notepad app. I didn't even have an LG phone.
How do you get that header is "AES/ECB/PKCS5Padding + SHA256"? What tool do you use? That's what I'm really interested in. To be clear, I have zero crypto-related reverse engineering experience.
Also, link to technical part goes to https://www.amazon.com/dp/1012097587 (Technical Reports, Part 4 by Miami Conservancy District ) and most likely wrong.
Edit: so, random "funny link", XDA? Hilarious.
I download zip file and extract theme. After extracting i copied my backup into same folder :
tazik@mx-linux:~/recoverlg
$ ls
lbf_extractor.py lbf_extractor_unpacker.py LGBackup_201102.lbf zip_anonymizer.py
tazik@mx-linux:~/recoverlg
I changed filename=f"LGBackup_201102.lbf" in lbf_extractor.py and run it but i got
tazik@mx-linux:~/recoverlg
$ python lbf_extractor.py
File "lbf_extractor.py", line 26
filename=f"LGBackup_201102.lbf"
^
SyntaxError: invalid syntax
tazik@mx-linux:~/recoverlg
How can i run ?
Try python3 lbf_extractor.py
. Default python is still python2 on most Linux distros.
Also, unless your phone is really old, I suggest https://github.com/Mysak0CZ/LBFtool
The author actually used debugger to get lbf structure and it should extract all files, not just zip archives.
Hi,
I have a backup file of my phone in LBF format. Could someone help me write my photos?
I can pay.
I do not speak English. I use a translator.
Thank you
Thank you very much