1 files changed, 54 insertions, 0 deletions
diff --git a/src/crypto/rand/windows.c b/src/crypto/rand/windows.c
new file mode 100644
index 0000000..6f3f3a7
--- /dev/null
+++ b/src/crypto/rand/windows.c
@@ -0,0 +1,54 @@
+/* Copyright (c) 2014, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <openssl/rand.h>
+
+#if defined(OPENSSL_WINDOWS)
+
+#include <limits.h>
+#include <stdlib.h>
+
+#pragma warning(push, 3)
+
+#include <Windows.h>
+
+/* #define needed to link in RtlGenRandom(), a.k.a. SystemFunction036.  See the
+ * "Community Additions" comment on MSDN here:
+ * http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx */
+#define SystemFunction036 NTAPI SystemFunction036
+#include <NTSecAPI.h>
+#undef SystemFunction036
+
+#pragma warning(pop)
+
+
+void RAND_cleanup(void) {
+}
+
+int RAND_bytes(uint8_t *out, size_t requested) {
+  while (requested > 0) {
+    ULONG output_bytes_this_pass = ULONG_MAX;
+    if (requested < output_bytes_this_pass) {
+      output_bytes_this_pass = requested;
+    }
+    if (RtlGenRandom(out, output_bytes_this_pass) == FALSE) {
+      abort();
+    }
+    requested -= output_bytes_this_pass;
+    out += output_bytes_this_pass;
+  }
+  return 1;
+}
+
+#endif  /* OPENSSL_WINDOWS */