Add tests
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/tests/suites/test_suite_platform_util.data b/tests/suites/test_suite_platform_util.data
new file mode 100644
index 0000000..948543a
--- /dev/null
+++ b/tests/suites/test_suite_platform_util.data
@@ -0,0 +1,23 @@
+Zeroize len 0, null
+mbedtls_platform_zeroize:0:1
+
+Zeroize len 0, non-null
+mbedtls_platform_zeroize:0:0
+
+Zeroize len 1
+mbedtls_platform_zeroize:1:0
+
+Zeroize len 4
+mbedtls_platform_zeroize:1:0
+
+Zeroize len 5
+mbedtls_platform_zeroize:1:0
+
+Zeroize len 32
+mbedtls_platform_zeroize:32:0
+
+Zeroize len 127
+mbedtls_platform_zeroize:127:0
+
+Zeroize len 128
+mbedtls_platform_zeroize:128:0
diff --git a/tests/suites/test_suite_platform_util.function b/tests/suites/test_suite_platform_util.function
new file mode 100644
index 0000000..e5464e0
--- /dev/null
+++ b/tests/suites/test_suite_platform_util.function
@@ -0,0 +1,41 @@
+/* BEGIN_HEADER */
+#include "mbedtls/platform_util.h"
+/* END_HEADER */
+
+/* BEGIN_CASE */
+void mbedtls_platform_zeroize(int len, int null)
+{
+ char buf[130];
+ char *p = NULL;
+
+ TEST_ASSERT(len <= 128);
+
+ /* Write sentinel values */
+ buf[0] = 2;
+ buf[len + 1] = 2;
+
+ /* Write non-zero content */
+ if (!null) {
+ p = &buf[1];
+ for (int i = 0; i < len; i++) {
+ p[i] = 1;
+ }
+ }
+
+ /* Check content is non-zero */
+ TEST_EQUAL(buf[0], 2);
+ for (int i = 0; i < len; i++) {
+ TEST_ASSERT(p[i] == 1);
+ }
+ TEST_EQUAL(buf[len + 1], 2);
+
+ mbedtls_platform_zeroize(p, len);
+
+ /* Check content is zero and sentinels un-changed */
+ TEST_EQUAL(buf[0], 2);
+ for (int i = 0; i < len; i++) {
+ TEST_ASSERT(p[i] == 0);
+ }
+ TEST_EQUAL(buf[len + 1], 2);
+}
+/* END_CASE */