Remove individual copies of mbedtls_zeroize()
This commit removes all the static occurrencies of the function
mbedtls_zeroize() in each of the individual .c modules. Instead the
function has been moved to utils.h that is included in each of the
modules.
diff --git a/library/havege.c b/library/havege.c
index 2b75ef7..c9bb64d 100644
--- a/library/havege.c
+++ b/library/havege.c
@@ -36,14 +36,10 @@
#include "mbedtls/havege.h"
#include "mbedtls/timing.h"
+#include "mbedtls/utils.h"
#include <string.h>
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
- volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-
/* ------------------------------------------------------------------------
* On average, one iteration accesses two 8-word blocks in the havege WALK
* table, and generates 16 words in the RES array.