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Update README.md

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Add a paragraph about support for custom ROMs and key attestation blocking.
This commit is contained in:
Alexis Mercier des Rochettes
2024-08-10 23:52:31 +02:00
committed by chiteroman
parent a407a01b34
commit 378e1ba2c8
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@@ -83,6 +83,12 @@ io.github.vvb2060.keyattestation
# use certificate generating mode for gms
com.google.android.gms!
```
## Custom ROMs support
If you are using a custom ROM and it passes Play Integrity (BASIC & DEVICE) by default, there is a good chance that this module won't work for you as your ROM is probably blocking Key Attestation.
To see if your ROM is compatible, look in the `android_frameworks_base` repo of your ROM and search for `PixelPropsUtils` or `setProps`.
To fix this issue, search for `engineGetCertificateChain` in that repo and see if there's some block of code that throws an exception if some condition that checks if it's related to key attestation (e.g. `PixelPropsUtils.getIsKeyAttest()` or `isCallerSafetyNet()`) is filled. You can delete this block of code and build your ROM yourself, or submit a commit to the maintainer of your ROM to add, for example, a system property to enable/disable this blocking. See [this commit](https://github.com/PixelBuildsROM/android_frameworks_base/commit/378ae3b7034d441fd0455639dc1a4b29b2876798) for reference.
## TODO