Imported OpenSSL 1.1.1a

crypto/mem_clr.c

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <string.h>
+#include <openssl/crypto.h>
+
+/*
+ * Pointer to memset is volatile so that compiler must de-reference
+ * the pointer and can't assume that it points to any function in
+ * particular (such as memset, which it then might further "optimize")
+ */
+typedef void *(*memset_t)(void *, int, size_t);
+
+static volatile memset_t memset_func = memset;
+
+void OPENSSL_cleanse(void *ptr, size_t len)
+{
+    memset_func(ptr, 0, len);
+}