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CertUtil: Use a better approach to determine microG GMS

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This commit is contained in:
Rahul Patel
2024-12-24 17:04:25 +05:30
parent c287ceaef1
commit 6b570ade13
2 changed files with 10 additions and 30 deletions
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34
app/src/main/java/com/aurora/store/util/CertUtil.kt
View File

@@ -44,15 +44,6 @@ object CertUtil {
const val GOOGLE_PLAY_CERT = const val GOOGLE_PLAY_CERT =
"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" "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"
// Keep this list updated as & when new signatures are added.
private val knownGMSSignatures = listOf(
"bd32424203e0fb25f36b57e5aa356f9bdd1da998",
"38918a453d07199354f8b19af05ec6562ced5788",
"2169eddb5fbb1fdf241c262681024692c4fc1ecb",
"58e1c4133f7441ec3d2c270270a14802da47ba0e",
"4f87463a1ae6f7d71b2c0b0658845790236dba42"
)
fun isFDroidApp(context: Context, packageName: String): Boolean { fun isFDroidApp(context: Context, packageName: String): Boolean {
return isInstalledByFDroid(context, packageName) || isSignedByFDroid(context, packageName) return isInstalledByFDroid(context, packageName) || isSignedByFDroid(context, packageName)
} }
@@ -100,27 +91,16 @@ object CertUtil {
} }
} }
fun isGoogleGMS(context: Context, packageName: String): Boolean { fun isMicroGGMS(context: Context, packageName: String): Boolean {
return try { return try {
getX509Certificates(context, packageName).any { certificate -> val packageInfo = getPackageInfo(context, packageName, PackageManager.GET_PERMISSIONS)
val signatureHash = extractSHA1Fingerprint(certificate) val hasFakePackageSignature = packageInfo.requestedPermissions?.any { permission ->
permission == "android.permission.FAKE_PACKAGE_SIGNATURE"
} == true
if (knownGMSSignatures.contains(signatureHash)) return true return hasFakePackageSignature
// Follow heuristics to determine if the app is signed by Google, just to ensure we don't miss any.
listOf(
certificate.issuerX500Principal,
certificate.subjectX500Principal
).any {
val map = parseX500Principal(it)
map["O"] == "Google LLC" || map["O"] == "Google Inc."
&& map["L"] == "Mountain View"
&& map["ST"] == "California"
&& map["C"] == "US"
}
}
} catch (exception: Exception) { } catch (exception: Exception) {
Log.e(TAG, "Failed to check signing cert for $packageName") Log.e(TAG, "Failed to check origin for $packageName")
false false
} }
} }

6
app/src/main/java/com/aurora/store/util/PackageUtil.kt
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@@ -66,10 +66,10 @@ object PackageUtil {
} }
fun hasSupportedMicroG(context: Context): Boolean { fun hasSupportedMicroG(context: Context): Boolean {
val isGoogle = CertUtil.isGoogleGMS(context, PACKAGE_NAME_MICRO_G) val isMicroG = CertUtil.isMicroGGMS(context, PACKAGE_NAME_MICRO_G)
// Do not check for MicroG if Google Play Services is installed // Do not proceed if MicroG variant is not installed
if (isGoogle) return false if (!isMicroG) return false
return if (isHuawei) { return if (isHuawei) {
isInstalled(context, PACKAGE_NAME_MICRO_G, VERSION_CODE_MICRO_G_HUAWEI) isInstalled(context, PACKAGE_NAME_MICRO_G, VERSION_CODE_MICRO_G_HUAWEI)