1 files changed, 63 insertions, 0 deletions
diff --git a/sal/osl/w32/random.cxx b/sal/osl/w32/random.cxx
new file mode 100644
index 0000000000..a2c364da2e
--- /dev/null
+++ b/sal/osl/w32/random.cxx
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#define _CRT_RAND_S
+
+#include <stdlib.h>
+#include <memory.h>
+
+#include <oslrandom.h>
+
+int osl_get_system_random_data(char* buffer, size_t desired_len)
+{
+    unsigned int val;
+
+    /* if unaligned fill to alignment */
+    if (reinterpret_cast<uintptr_t>(buffer) & 3)
+    {
+        size_t len = 4 - (reinterpret_cast<size_t>(buffer) & 3);
+
+        if (len > desired_len)
+        {
+            len = desired_len;
+        }
+        if (rand_s(&val))
+        {
+            return 0;
+        }
+        memcpy(buffer, &val, len);
+        buffer += len;
+        desired_len -= len;
+    }
+    /* fill directly into the buffer as long as we can */
+    while (desired_len >= 4)
+    {
+        if (rand_s(reinterpret_cast<unsigned int*>(buffer)))
+        {
+            return 0;
+        }
+        else
+        {
+            buffer += 4;
+            desired_len -= 4;
+        }
+    }
+    /* deal with the partial int reminder to fill */
+    if (desired_len)
+    {
+        if (rand_s(&val))
+        {
+            return 0;
+        }
+        memcpy(buffer, &val, desired_len);
+    }
+    return 1;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */