From 960292337c461f99070c677bfaeab3016222b4b2 Mon Sep 17 00:00:00 2001
From: Paul Bakker <paul@brainspark.nl>
Date: Wed, 1 Jun 2016 15:25:50 +0100
Subject: [PATCH] Initial entropy run should be context specific

Otherwise test influence each other.
Is a change to the context but only if the NV seed feature is enabled
---
 include/mbedtls/entropy.h | 3 +++
 library/entropy.c         | 8 ++------
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/include/mbedtls/entropy.h b/include/mbedtls/entropy.h
index c9bd9613d..fed0494ed 100644
--- a/include/mbedtls/entropy.h
+++ b/include/mbedtls/entropy.h
@@ -134,6 +134,9 @@ typedef struct
 #if defined(MBEDTLS_THREADING_C)
     mbedtls_threading_mutex_t mutex;    /*!< mutex                  */
 #endif
+#if defined(MBEDTLS_ENTROPY_NV_SEED)
+    int initial_entropy_run;
+#endif
 }
 mbedtls_entropy_context;
 
diff --git a/library/entropy.c b/library/entropy.c
index 1982b1096..dc2a00c85 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -54,10 +54,6 @@ static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if defined(MBEDTLS_ENTROPY_NV_SEED)
-static int initial_entropy_run = 0;
-#endif
-
 #define ENTROPY_MAX_LOOP    256     /**< Maximum amount to loop before error */
 
 void mbedtls_entropy_init( mbedtls_entropy_context *ctx )
@@ -285,9 +281,9 @@ int mbedtls_entropy_func( void *data, unsigned char *output, size_t len )
     /* Update the NV entropy seed before generating any entropy for outside
      * use.
      */
-    if( initial_entropy_run == 0 )
+    if( ctx->initial_entropy_run == 0 )
     {
-        initial_entropy_run = 1;
+        ctx->initial_entropy_run = 1;
         if( ( ret = mbedtls_entropy_update_nv_seed( ctx ) ) != 0 )
             return( ret );
     }