SignatureUtils.java 文件源码

public static boolean checkSignature(Context context) {
    try {
        PackageInfo packageInfo = context.getPackageManager()
                .getPackageInfo(context.getPackageName(), PackageManager.GET_SIGNATURES);
        for (Signature signature : packageInfo.signatures) {
            MessageDigest sha = MessageDigest.getInstance("SHA");
            sha.update(signature.toByteArray());
            final String currentSignature = Base64.encodeToString(sha.digest(), Base64.DEFAULT);
            if (SIGNATURE.equals(currentSignature)) {
                return true;
            }
        }
    } catch (Exception e) {
        Log.e(TAG, "Failed to check signature", e);
    }

    return false;
}