1 files changed, 78 insertions, 0 deletions
diff --git a/lib/nettle/sysrng-getentropy.c b/lib/nettle/sysrng-getentropy.c
new file mode 100644
index 0000000..0666d48
--- /dev/null
+++ b/lib/nettle/sysrng-getentropy.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2010-2016 Free Software Foundation, Inc.
+ * Copyright (C) 2015-2016 Red Hat, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GNUTLS.
+ *
+ * The GNUTLS library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ *
+ */
+
+/* The *BSD getentropy() system random generator. The simplest of all.
+ */
+
+#include "gnutls_int.h"
+#include "errors.h"
+#include <locks.h>
+#include <num.h>
+#include <errno.h>
+#include <rnd-common.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#ifdef __APPLE__
+#include <sys/random.h>
+#endif
+
+/* gnulib wants to claim strerror even if it cannot provide it. WTF */
+#undef strerror
+
+/* The POSIX (Linux-BSD) randomness gatherer.
+ */
+
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <fcntl.h>
+
+get_entropy_func _rnd_get_system_entropy = NULL;
+
+static int _rnd_get_system_entropy_simple(void* _rnd, size_t size)
+{
+	if (getentropy(_rnd, size) < 0) {
+		int e = errno;
+		gnutls_assert();
+		_gnutls_debug_log
+			("Failed to use getentropy: %s\n",
+					 strerror(e));
+		return GNUTLS_E_RANDOM_DEVICE_ERROR;
+	}
+	return 0;
+}
+
+int _rnd_system_entropy_init(void)
+{
+	_rnd_get_system_entropy = _rnd_get_system_entropy_simple;
+	return 0;
+}
+
+void _rnd_system_entropy_deinit(void)
+{
+	return;
+}
+