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/aes.c b/library/aes.c
index da94b19..797e00f 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -36,6 +36,7 @@
#include <string.h>
#include "mbedtls/aes.h"
+#include "mbedtls/utils.h"
#if defined(MBEDTLS_PADLOCK_C)
#include "mbedtls/padlock.h"
#endif
@@ -54,11 +55,6 @@
#if !defined(MBEDTLS_AES_ALT)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
- volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
-}
-
/*
* 32-bit integer manipulation macros (little endian)
*/