[GH-ISSUE #63] Old backups cannot be decrypted #57

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opened 2026-02-25 20:34:33 +03:00 by kerem · 2 comments

kerem commented

2026-02-25 20:34:33 +03:00

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Originally created by @danzilberdan on GitHub (Aug 21, 2020).
Original GitHub issue: https://github.com/B16f00t/whapa/issues/63

whapa decrypts backups fine with the key from the same phone.
But when using old backups (from google drive), the same key fails to decrypt the database with the following error message:
"Error -3 while decompressing data: incorrect header check"

Originally created by @danzilberdan on GitHub (Aug 21, 2020). Original GitHub issue: https://github.com/B16f00t/whapa/issues/63 whapa decrypts backups fine with the key from the same phone. But when using old backups (from google drive), the same key fails to decrypt the database with the following error message: "Error -3 while decompressing data: incorrect header check"

kerem closed this issue

2026-02-25 20:34:33 +03:00

kerem commented

2026-02-25 20:34:33 +03:00

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@B16f00t commented on GitHub (Sep 13, 2020):

That is not a whapa problem, I understand that the decryption key for the new copies is different from that of the old copies

@B16f00t commented on GitHub (Sep 13, 2020): That is not a whapa problem, I understand that the decryption key for the new copies is different from that of the old copies

kerem commented

2026-02-25 20:34:33 +03:00

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@danzilberdan commented on GitHub (Sep 16, 2020):

But whatsApp is able to decrypt the old database. How does it do it if it's using a different key file?
My understanding is that each phone number has only one key file so the keys should be the same in the old and new phone.

@danzilberdan commented on GitHub (Sep 16, 2020): But whatsApp is able to decrypt the old database. How does it do it if it's using a different key file? My understanding is that each phone number has only one key file so the keys should be the same in the old and new phone.

kerem referenced this issue

2026-02-25 20:34:34 +03:00

[GH-ISSUE #71] Traceback (most recent call last): File "whapa-gui.py", line 1049, in <module> Whapa(img_folder, icons) File "whapa-gui.py", line 521, in __init__ update = (request.text.split('itemprop="about">')[1]).split("</span>")[0].stri… #65