Diff: crypto/crypto_prng.h

Revision:

2:527a66d0a1a9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/crypto_prng.h	Mon Jun 09 14:57:54 2014 +0000
@@ -0,0 +1,63 @@
+/*
+MiniTLS - A super trimmed down TLS/SSL Library for embedded devices
+Author: Donatien Garnier
+Copyright (C) 2013-2014 AppNearMe Ltd
+
+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.
+
+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.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*//**
+ * \file crypto_prng.h
+ * \copyright Copyright (c) AppNearMe Ltd 2013
+ * \author Donatien Garnier
+ */
+
+#ifndef CRYPTO_PRNG_H_
+#define CRYPTO_PRNG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "core/fwk.h"
+#include "inc/minitls_errors.h"
+
+#include "crypto_aes_128.h"
+#include "crypto_sha1.h"
+
+//This PRNG is based on Yarrow (AES128 + SHA1)
+
+typedef struct __crypto_prng
+{
+  crypto_aes_128_t cipher;
+  //crypto_sha1_t hash;
+  uint32_t counter;
+  uint8_t pool[SHA1_SIZE];
+  uint8_t buf[AES_128_BLOCK_SIZE];
+  size_t buf_pos;
+  bool fed;
+  rtos_mtx_t* mtx;
+}
+crypto_prng_t;
+
+//Thread safe if mutex supplied (can be NULL)
+void crypto_prng_init(crypto_prng_t* prng, rtos_mtx_t* mtx);
+void crypto_prng_feed(crypto_prng_t* prng, uint8_t* data, size_t size);
+void crypto_prng_update(crypto_prng_t* prng);
+void crypto_prng_get(crypto_prng_t* prng, uint8_t* data, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CRYPTO_PRNG_H_ */