Add secure_wipe()

tillitis · Feb 7, 2024 · 110907d · 110907d
1 parent 9300507
commit 110907d
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diff --git a/include/tkey/lib.h b/include/tkey/lib.h
@@ -13,4 +13,5 @@ void memcpy_s(void *dest, size_t destsize, const void *src, size_t n);
 void *wordcpy(void *dest, const void *src, unsigned n);
 void wordcpy_s(void *dest, size_t destsize, const void *src, size_t n);
 int memeq(void *dest, const void *src, size_t n);
+void secure_wipe(void *v, size_t n);
 #endif
diff --git a/libcommon/lib.c b/libcommon/lib.c
@@ -82,3 +82,10 @@ int memeq(void *dest, const void *src, size_t n)
 
 	return res;
 }
+
+void secure_wipe(void *v, size_t n)
+{
+	volatile uint8_t *p = (volatile uint8_t *)v;
+	while (n--)
+		*p++ = 0;
+}