nss-3.21nss-3.21

1 files changed, 49 insertions, 0 deletions

diff --git a/nss/lib/freebl/sysrand.c b/nss/lib/freebl/sysrand.c
new file mode 100644
index 0000000..e6dd56a
--- /dev/null
+++ b/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