From e9abcbac3b75b2d99f04d26614826e469c47abbc Mon Sep 17 00:00:00 2001
From: Fabio Alessandrelli <fabio.alessandrelli@gmail.com>
Date: Wed, 9 Oct 2019 15:59:17 +0200
Subject: Fix crash when passing invalid key to Crypto.

In generate_self_signed_certificate
---
 modules/mbedtls/crypto_mbedtls.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/mbedtls/crypto_mbedtls.cpp b/modules/mbedtls/crypto_mbedtls.cpp
index ca656b4b9b..204f4e8905 100644
--- a/modules/mbedtls/crypto_mbedtls.cpp
+++ b/modules/mbedtls/crypto_mbedtls.cpp
@@ -237,6 +237,7 @@ Ref<CryptoKey> CryptoMbedTLS::generate_rsa(int p_bytes) {
 
 Ref<X509Certificate> CryptoMbedTLS::generate_self_signed_certificate(Ref<CryptoKey> p_key, String p_issuer_name, String p_not_before, String p_not_after) {
 	Ref<CryptoKeyMbedTLS> key = static_cast<Ref<CryptoKeyMbedTLS> >(p_key);
+	ERR_FAIL_COND_V_MSG(key.is_null(), NULL, "Invalid private key argument.");
 	mbedtls_x509write_cert crt;
 	mbedtls_x509write_crt_init(&crt);
 
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