From 28c7e7f6fabe8b921bcf2f8fc044e126236da38e Mon Sep 17 00:00:00 2001
From: Paul Bakker <p.j.bakker@polarssl.org>
Date: Thu, 15 Dec 2011 19:49:30 +0000
Subject: [PATCH]  - Added HAVEGE as a default entropy source

---
 include/polarssl/entropy.h | 8 ++++++++
 library/entropy.c          | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/polarssl/entropy.h b/include/polarssl/entropy.h
index aeec8b25d..6dea79a71 100644
--- a/include/polarssl/entropy.h
+++ b/include/polarssl/entropy.h
@@ -29,7 +29,12 @@
 
 #include <string.h>
 
+#include "config.h"
+
 #include "sha4.h"
+#if defined(POLARSSL_HAVEGE_C)
+#include "havege.h"
+#endif
 
 #define POLARSSL_ERR_ENTROPY_SOURCE_FAILED                 -0x003C  /**< Critical entropy source failure. */
 #define POLARSSL_ERR_ENTROPY_MAX_SOURCES                   -0x003E  /**< No more sources can be added. */
@@ -77,6 +82,9 @@ typedef struct
     sha4_context    accumulator;
     int             source_count;
     source_state    source[ENTROPY_MAX_SOURCES];
+#if defined(POLARSSL_HAVEGE_C)
+    havege_state    havege_data;
+#endif
 }
 entropy_context;
 
diff --git a/library/entropy.c b/library/entropy.c
index bc0e141b2..ebace0881 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -30,6 +30,10 @@
 #include "polarssl/entropy.h"
 #include "polarssl/entropy_poll.h"
 
+#if defined(POLARSSL_HAVEGE_C)
+#include "polarssl/havege.h"
+#endif
+
 #define ENTROPY_MAX_LOOP    256     /**< Maximum amount to loop before error */
 
 void entropy_init( entropy_context *ctx )
@@ -45,6 +49,11 @@ void entropy_init( entropy_context *ctx )
 #if defined(POLARSSL_TIMING_C)
     entropy_add_source( ctx, hardclock_poll, NULL, ENTROPY_MIN_HARDCLOCK );
 #endif
+#if defined(POLARSSL_HAVEGE_C)
+    havege_init( &ctx->havege_data );
+    entropy_add_source( ctx, havege_poll, &ctx->havege_data,
+                        ENTROPY_MIN_HAVEGE );
+#endif
 }
 
 int entropy_add_source( entropy_context *ctx,