![]() You can extract the AES key with hexdump and assign the value to variable $k. The 256-bit AES key is saved from offset 0x7E till 0x9D in the file. The encryption method being used is AES with a key ( K) length of 256 bits and an initialisation vector ( IV) size of 128 bits. This section is just for your information and you can skip this section. $ adb pull /sdcard/WhatsApp/Databases/msgstore.db.crypt12 Pull the encrypted WhatsApp messages file from your phone using ADB. The idea is to install an older version of WhatsApp, where Android ADB backup was still working and extract the key file from the backup. If your phone is not rooted, refer to instructions from WhatCrypt and Omni-Crypt for details on extracting the key file. I will not go through the steps again, as it’s already mentioned in the crypt8 decryption article. ![]() If your phone is rooted, extracting this file is easy. WhatsApp stores the key file in a secure location: /data/data/com.whatsapp/files/key. The key file stores the encryption key, K. To decrypt the crypt12 files, you will first need the key file. I would like to highlight that IGLogger proved to be a very useful tool when it came to smali code debugging. From crypt9, they seem to be using a modified version of Spongy Castle – a cryptography API library for Android.Īll the findings below are based on reverse engineering work done on WhatCrypt and Omni-Crypt. WhatsApp backup conversation files are now saved with the.
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