GMS signature invalid

[zgxgoo]

After i signed the GMS by APP's signature, it worked; then i put the phone in the table for a few hours, the GMS's signature was invalid, and cannot sign again unless reboot the phone .

[kbobrowski]

Hi @zgxgoo , thanks for this report. If I understood correctly, you launched the script with python en.py sign -p {package_name} -s {signature}, it worked so you could launch custom app properly, then after few hours you tried to use the custom app again, it did not work, and furthermore it did not work even after running en.py again. Is this correct?

As to why your custom app did not work after few hours - it may be due to the fact that GMS restarted, and was not patched anymore, or perhaps the en.py or frida server died. If frida server was still running, then it's quite strange that running en.py again did not resolve the issues. If you encounter this error again it would be great if you could paste here the output of en.py :)

[zgxgoo]

Hi, @kbobrowski, yes , you understood correctly, the output of the script is [allow.js] injecting [allow.js] received payload;

[kbobrowski]

Thanks, I'll check if I can reproduce it

[zgxgoo]

Pixel 2 android 10

Kamil Bobrowski [email protected] 于 2020年8月8日周六 下午5:57写道：

Thanks, I'll check if I can reproduce it

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[kbobrowski]

@zgxgoo unfortunately I could not reproduce this issue, as I have another one - when I leave the phone connected via USB and frida script running for a few hours, the phone switches itself off. It could be that something strange happens inside GMS, as we are patching quite low level methods which may be used by other parts of GMS, and this could potentially lead to unexpected issues. I'm using quite old phone with Android 6 which may have its own issues, perhaps I'll root Android 10 device soon, would be easier to debug it.