From 420151dbd9e9737fcb7df46529b5fa63a10b8efa Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Thu, 17 Mar 2016 23:21:33 +0800
Subject: move m_burn and function attributes to dbhelpers use m_burn for
 libtomcrypt zeromem() too

---
 dbhelpers.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 dbhelpers.c

(limited to 'dbhelpers.c')

diff --git a/dbhelpers.c b/dbhelpers.c
new file mode 100644
index 0000000..f7461d9
--- /dev/null
+++ b/dbhelpers.c
@@ -0,0 +1,25 @@
+#include "dbhelpers.h"
+#include "includes.h"
+
+/* Erase data */
+void m_burn(void *data, unsigned int len) {
+
+#if defined(HAVE_MEMSET_S)
+	memset_s(data, len, 0x0, len);
+#elif defined(HAVE_EXPLICIT_BZERO)
+	explicit_bzero(data, len);
+#else
+/* Based on the method in David Wheeler's
+ * "Secure Programming for Linux and Unix HOWTO". May not be safe
+ * against link-time optimisation. */
+	volatile char *p = data;
+
+	if (data == NULL)
+		return;
+	while (len--) {
+		*p++ = 0x0;
+	}
+#endif
+}
+
+
-- 
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