MAGISK Universal SafetyFix

[techinbermudas]

This is a universal fix for SafetyNet by by kdrag0n on devices with hardware attestation and unlocked bootloaders. It defeats both hardware attestation and the new SafetyNet CTS profile updates released on January 12, 2021. The only requirement is that you can pass basic attestation, which requires a valid combination of device and model names, build fingerprints, and security patch levels.
Passing basic attestation is mostly out-of-scope for this module; this module is meant to defy hardware attestation, as well as reported "basic" attestation that actually uses hardware under-the-hood. Nonetheless, it features a few basic attempts at helping pass basic attestation on some devices, especially older devices and devices running stock ROMs.
No device-specific features (such as the new Pixel-exclusive Google Assistant design or screen-off voice match) will be lost with this fix.
Android versions 8–11 are supported. Heavy OEM skins are not officially supported, but they may work depending on your luck and the particular ROM in question. Please do not report problems on such ROMs.


How does it work?

The way this workaround works is relatively low-level. An in-depth explanation, as well as source code and ROM changes, can be found on GitHub. Ideally, this workaround should be incorporated in ROMs instead of overriding part of the ROM in a Magisk module. The ROM changes for it are linked above for ROM developers to use.

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