Tricky Store

A trick of keystore. Android 12 or above is required.

Usage

Flash this module and reboot.
Put keybox.xml to /data/adb/tricky_store/keybox.xml .
Put target packages to /data/adb/tricky_store/target.txt (Optional).
Enjoy!

keybox.xml

format:

<?xml version="1.0"?>
<AndroidAttestation>
    <NumberOfKeyboxes>1</NumberOfKeyboxes>
    <Keybox DeviceID="...">
        <Key algorithm="ecdsa|rsa">
            <PrivateKey format="pem">
-----BEGIN EC PRIVATE KEY-----
...
-----END EC PRIVATE KEY-----
            </PrivateKey>
            <CertificateChain>
                <NumberOfCertificates>...</NumberOfCertificates>
                    <Certificate format="pem">
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
                    </Certificate>
                ... more certificates
            </CertificateChain>
        </Key>...
    </Keybox>
</AndroidAttestation>

Build Vars Spoofing

Zygisk (or Zygisk Next) is needed for this feature to work.

If you can not pass strong integrity, you can try to enable build vars spoofing by creating a file /data/adb/tricky_store/spoof_build_vars.

After doing that, TrickyStore will automatically generate an example config json inside /data/adb/tricky_store/spoof_build_vars on next reboot. Then you can manually edit your spoof config.

Here is an example of spoof config:

{
   "manufacturer": "Google",
   "model": "Pixel",
   "fingerprint": "google/sailfish/sailfish:8.1.0/OPM1.171019.011/4448085:user/release-keys",
   "brand": "google",
   "product": "sailfish",
   "device": "sailfish",
   "release": "8.1.0",
   "id": "OPM1.171019.011",
   "incremental": "4448085",
   "security_patch": "2017-12-05",
   "type": "user",
   "tags": "release-keys"
}

Support TEE broken devices

TrickyStore will hack leaf certificate by default. On TEE broken devices, this will not work because we can't retrieve leaf certificate from TEE. You can add a ! after package name to enable certificate generate support for this package.

For example:

# target.txt
# use leaf certificate hacking mode for KeyAttestation App
io.github.vvb2060.keyattestation
# use certificate generating mode for gms
com.google.android.gms!

Known issue

App Attest Key is not supported.
StrongBox is not supported.