Provide RNG_WEAK quality random generator in rdrand

1 files changed, 47 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/rdrand/rdrand_rng.h b/src/libstrongswan/plugins/rdrand/rdrand_rng.h
new file mode 100644
index 000000000..d15a48224
--- /dev/null
+++ b/src/libstrongswan/plugins/rdrand/rdrand_rng.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup rdrand_rng rdrand_rng
+ * @{ @ingroup rdrand
+ */
+
+#ifndef RDRAND_RNG_H_
+#define RDRAND_RNG_H_
+
+#include <crypto/rngs/rng.h>
+
+typedef struct rdrand_rng_t rdrand_rng_t;
+
+/**
+ * RNG implemented with Intels RDRAND instructions, introduced in Ivy Bridge.
+ */
+struct rdrand_rng_t {
+
+	/**
+	 * Implements rng_t interface.
+	 */
+	rng_t rng;
+};
+
+/**
+ * Create a rdrand_rng instance.
+ *
+ * @param quality		RNG quality
+ * @return				RNG instance
+ */
+rdrand_rng_t *rdrand_rng_create(rng_quality_t quality);
+
+#endif /** RDRAND_RNG_H_ @}*/