public boolean validateSignature(Context context, String packageName) {
String brand = Build.BRAND;
int applicationFlags = context.getApplicationInfo().flags;
if (brand.startsWith("generic")
&& (applicationFlags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
// We are debugging on an emulator, don't validate package signature.
return true;
}
PackageInfo packageInfo = null;
try {
packageInfo =
context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
} catch (PackageManager.NameNotFoundException e) {
return false;
}
for (Signature signature : packageInfo.signatures) {
String hashedSignature = Utility.sha1hash(signature.toByteArray());
if (validAppSignatureHashes.contains(hashedSignature)) {
return true;
}
}
return false;
}
