decrypt Boox Update Upx

Have been tested only in these Boox ereaders. If you found it available for any other Boox ereader, please submit an issue or pull request, with the strings following.

Note1: There is also another method to fetch decrypted update.zip from @shunf4.

Note2: There is a way to get downloading url of latest firmware.

Any other issue and pull request is also welcomed!

The detail of algorithm (Simplified Chinese)

Demo

There is a python class DeBooxUpx in DeBooxUpx.py to decrypt update.upx, and dict boox_strings where there are known strings.

Following is a example to use this class to decrypt the update.upx of Boox Nove Pro:

from DeBooxUpx import DeBooxUpx, boox_strings
model = 'NovaPro'
updateUpxPath = 'update.upx'
decryptedPath = 'update.zip'

decrypter = DeBooxUpx(**boox_strings[model])
print('When updating, the device decrypt update package into', decrypter.path)
decrypter.deUpx(updateUpxPath, decryptedPath)

Or for manually setting strings:

from DeBooxUpx import DeBooxUpx

MODEL = "NovaPro" 
STRING_7F00500 = "j857wYAQcWZgvIEQ/tcQqzxreUJgFHwJl6D2TN9BuSkQ" 
STRING_7F00501 = "+soGw/YVdGIRJiAs5SMmv1ihW37H1Fa9+/1w2Vgt14Ag" 
STRING_7F00502 = "lpsj9NJ8Kzv8jHb+OO8A5lxC+9Zhl243bFmDZYaF" 
updateUpxPath = 'update.upx'
decryptedPath = 'update.zip'

decrypter = DeBooxUpx(MODEL, STRING_7F00500, STRING_7F00501, STRING_7F00502)
print('When updating, the device decrypt update package into', decrypter.path)
decrypter.deUpx(updateUpxPath, decryptedPath)

The strings

	MODEL	STRING_7F00500 (S1)	STRING_7F00501 (S2)	STRING_7F00502 (S3)
NovaPro	`NovaPro`	`j857wYAQcWZgvIEQ/tcQqzxreUJgFHwJl6D2TN9BuSkQ`	`+soGw/YVdGIRJiAs5SMmv1ihW37H1Fa9+/1w2Vgt14Ag`	`lpsj9NJ8Kzv8jHb+OO8A5lxC+9Zhl243bFmDZYaF`
NovaPlus	`NovaPlus`	`MtoBkApRAVwzdGe2CTnaE4MIgevRYNQfaKo606tyUQNY`	`Nttwkwxaei8xorBu/uUBpUu8nNZHTRIAZMZc0xrJs9Ti`	`LIYj1F9NVXFrOfi24/C76gFFxHYSCJ4mfhYI4q5w`
Max3	`Max3`	`1wdvUHZmcz32N1pgG4fkHmDsTDVihMJsPCNV4mW/6u1k`	`3nxuLgdpBE3B3n1Yyymt4cOS8dNucfQxK8YOsmcemuyO`	`yCA9YlFxLBdLbDUl3vwzPkn9vtYuVFZCfhrOTvR1`
MaxLumi	`MaxLumi`	`mTZFN0K+oMcGnn2n7+zV5DH7kr/Hbes2x/wKDJp6K7Kq`	`mj0zR0Oy3L4R+6y49MIEQT9bdx9AVz8TWyG9q3N+d9VY`	`hWAUdhOp9ekIYxIW+LpVj6OviWBbCbRa1c7s1jtW`
Note2	`Note2`	`etwiPPEXAQRj3m+e0Q2FOxT16aJ8XexQAqhGn5NqZWv1`	`et0jSPpmd3ueGHLmMf+2yyXVn18sa2HrDg56dCTFH6lf`	`YY9wfqN7K1LlSug47Tr5Y8QkDHmmJ4VDCJ58mhoV`
NotePro	`NotePro`	`MjR72bOazBUacJwDcuWgtm/E0A9F9ahIt1buweEPA020`	`RjV8r7+fx2Wjp6rUSrBOpmqYnHKs7eReqTTcy9k4c3tn`	`W2co6eaDmEl7jIjOSqr11C71RDHHiV3p5oG2G54X`
Note3	`Note3`	`uTiMM5JgTXOCZAZKMcZIzc1yQpfX1+jxTFOred3te4z9`	`zEf3SZ8TOADA8QuwOHicGLrrc4EA7sffKfc01TlUfe/q`	`pmXVBMt5EllxXhD9L6/NWH/pTZXRURP6QLsrNlx6`

Some or all of the firmwares for the Onyx readers sold in Russia don't use the same strings with their international versions!

How to get the strings

MODEL string is the model name, exactly the output of getprop ro.product.model and/or value of ro.product.model in the file /system/build.prop.

Other strings can be got in following steps:

Get /system/app/OnyxOtaService/OnyxOtaService.apk

USB Debugging (adb) is one of the the available ways:
1. Turn on adb in Settings -> Applications -> USB Debugging Mode
2. (from @mgrub's note) Connect the ebook to computer by usb, run
```
adb wait-for-device
adb shell 'pm list packages -f | grep ota'
```
  And then the path of ota package will be showed. For example, the following output is in Nova Pro:
```
package:/system/app/OnyxOtaService/OnyxOtaService.apk=com.onyx.android.onyxotaservice
```
  So in this case the path is /system/app/OnyxOtaService/OnyxOtaService.apk.
  
  In the following steps, we assume that the path is /system/app/OnyxOtaService/OnyxOtaService.apk.
3. Run the following command
```
adb pull /system/app/OnyxOtaService/OnyxOtaService.apk .
```
Now the apk is got.

Get the strings from apk

Use Apktool to decode the apk:
```
apktool d OnyxOtaService.apk
```

Now the strings should be in ./OnyxOtaService/res/values/strings.xml, for example the NovaPro one:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="settings">j857wYAQcWZgvIEQ/tcQqzxreUJgFHwJl6D2TN9BuSkQ</string>
    <string name="upgrade">+soGw/YVdGIRJiAs5SMmv1ihW37H1Fa9+/1w2Vgt14Ag</string>
    <string name="local">lpsj9NJ8Kzv8jHb+OO8A5lxC+9Zhl243bFmDZYaF</string>
    
</resources>

settings is STRING_7F00500, upgrade is STRING_7F00501, and local is STRING_7F00502

galunid / decryptbooxupdateupx Goto Github PK