1 files changed, 49 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/sysrand.c b/security/nss/lib/freebl/sysrand.c
new file mode 100644
index 000000000..0128fa0ee
--- /dev/null
+++ b/security/nss/lib/freebl/sysrand.c
@@ -0,0 +1,49 @@
+/* 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/. */
+
+#ifdef FREEBL_NO_DEPEND
+#include "stubs.h"
+#endif
+
+#include "seccomon.h"
+
+#ifndef XP_WIN
+static size_t rng_systemFromNoise(unsigned char *dest, size_t maxLen);
+#endif
+
+#if defined(XP_UNIX) || defined(XP_BEOS)
+#include "unix_rand.c"
+#endif
+#ifdef XP_WIN
+#include "win_rand.c"
+#endif
+#ifdef XP_OS2
+#include "os2_rand.c"
+#endif
+
+#ifndef XP_WIN
+/*
+ * Normal RNG_SystemRNG() isn't available, use the system noise to collect
+ * the required amount of entropy.
+ */
+static size_t
+rng_systemFromNoise(unsigned char *dest, size_t maxLen)
+{
+    size_t retBytes = maxLen;
+
+    while (maxLen) {
+        size_t nbytes = RNG_GetNoise(dest, maxLen);
+
+        PORT_Assert(nbytes != 0);
+
+        dest += nbytes;
+        maxLen -= nbytes;
+
+        /* some hw op to try to introduce more entropy into the next
+         * RNG_GetNoise call */
+        rng_systemJitter();
+    }
+    return retBytes;
+}
+#endif