From c5da7131f53f6fb659f64be4b9bf089f7e389143 Mon Sep 17 00:00:00 2001
From: Steven Fackler <sfackler@palantir.com>
Date: Thu, 29 Sep 2016 00:09:31 +0200
Subject: [PATCH] Make sure private component exists when signing

Closes #457
---
 openssl/src/crypto/rsa.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/openssl/src/crypto/rsa.rs b/openssl/src/crypto/rsa.rs
index feb66a6f..3ba063cd 100644
--- a/openssl/src/crypto/rsa.rs
+++ b/openssl/src/crypto/rsa.rs
@@ -163,6 +163,7 @@ impl RSA {
     }
 
     pub fn sign(&self, hash: hash::Type, message: &[u8]) -> Result<Vec<u8>, ErrorStack> {
+        assert!(self.d().is_some(), "private components missing");
         let k_len = self.size().expect("RSA missing an n");
         let mut sig = vec![0; k_len as usize];
         let mut sig_len = k_len;