core-android/src/main/java/com/uber/sdk/android/core/utils/AppProtocol.java
public boolean validateSignature(@NonNull Context context, @NonNull String packageName) {
        if (isDebug(context)) {
            return true;
        }

        PackageInfo packageInfo;
        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 false;
            }
        }
        return true;
    }
public boolean validateSignature(@NonNull Context context, @NonNull String packageName) {
        if (isDebug(context)) {
            return true;
        }

        PackageInfo packageInfo;
        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 false;
            }
        }
        return true;
    }
Validates the app signature required or returns true if in debug.