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README.md

decrypt airconsole firmware images

You might know the airconsole - some sort of wifi enabled device that runs a minimal linux distribution similar to openwrt which can be used as a serial to ethernet gateway. They distribute firmware updates but unfortunately they are encrypted.

Usage

./fw_tool [fwimage.bin] decrypts the firmware image into a file named fwimage.bin.decrypted and encrypts the firmware into a new file named fwimage.bin.encrypted.

Example

Let's assume, that you've got a file named airconsole-2.80-web.bin with the following hash values:

SHA256: 8863e9d926b7c96330813d35df1451dda12889f8802c3d100cdd54c8adf99f9b airconsole-2.80-web.bin
SHA512: e72a3085d6db86c88a5d2b1668c3c9566910f3f22542e05e995d8a24f93003a3d244a94a06e4679debacedfb68d9b9830d06bad49e1115797649ee6e09fa61bb airconsole-2.80-web.bin

This is how the decryption of the file would look like:

feuerrot@lynx % ./fw_tool airconsole-2.80-web.bin
File length:
From header: 3489792 byte
 Calculated: 3489792 byte
Header CRC32:
From header: 0x7ac49366
 Calculated: 0x7ac49366
Data CRC32:
From header: 0x49132a26
 Calculated: 0x49132a26
Timestamp: 2016-10-07 01:58:14
XTEA key: 0x7AC49366 0x57F6E516 0x00353FC0 0x49132A26

Where do I get a firmware file?

You can download the latest firmware (currently airconsole-2.80-web.bin) here

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