Add init-free tests for entropy
These tests validate that an entropy object can be reused and that
calling mbedtls_entropy_free() twice is ok.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_entropy.data b/tests/suites/test_suite_entropy.data
index b2d20b4..2ce01fa 100644
--- a/tests/suites/test_suite_entropy.data
+++ b/tests/suites/test_suite_entropy.data
@@ -1,3 +1,9 @@
+Entropy init-free-free
+entropy_init_free:0
+
+Entropy init-free-init-free
+entropy_init_free:1
+
Create NV seed_file
nv_seed_file_create:
diff --git a/tests/suites/test_suite_entropy.function b/tests/suites/test_suite_entropy.function
index 2a7b0de..ad9b5a4 100644
--- a/tests/suites/test_suite_entropy.function
+++ b/tests/suites/test_suite_entropy.function
@@ -134,6 +134,28 @@
* END_DEPENDENCIES
*/
+/* BEGIN_CASE */
+void entropy_init_free( int reinit )
+{
+ mbedtls_entropy_context ctx;
+
+ /* Double free is not explicitly documented to work, but it is convenient
+ * to call mbedtls_entropy_free() unconditionally on an error path without
+ * checking whether it has already been called in the success path. */
+
+ mbedtls_entropy_init( &ctx );
+ mbedtls_entropy_free( &ctx );
+
+ if( reinit )
+ mbedtls_entropy_init( &ctx );
+ mbedtls_entropy_free( &ctx );
+
+ /* This test case always succeeds, functionally speaking. A plausible
+ * bug might trigger an invalid pointer dereference or a memory leak. */
+ goto exit;
+}
+/* END_CASE */
+
/* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_NV_SEED:MBEDTLS_FS_IO */
void entropy_seed_file( char * path, int ret )
{
