From 15b0155c21e16818d97f7239be94f697aa96ef14 Mon Sep 17 00:00:00 2001
From: Richard Kettlewell <Richard.Kettlewell@thalesesecurity.com>
Date: Tue, 7 Aug 2018 10:51:55 +0100
Subject: [PATCH] Keep blockModeCloser alive during PKCS#11 calls

re #6
---
 blockmode.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/blockmode.go b/blockmode.go
index b557ef9..56101bc 100644
--- a/blockmode.go
+++ b/blockmode.go
@@ -179,6 +179,7 @@ func (bmc *blockModeCloser) CryptBlocks(dst, src []byte) {
 		panic("nontrivial result from *Final operation")
 	}
 	copy(dst[:len(result)], result)
+	runtime.KeepAlive(bmc)
 }
 
 func (bmc *blockModeCloser) Close() {