Introduce new files rsa_internal.[ch] for RSA helper functions
This commit splits off the RSA helper functions into separate headers and
compilation units to have a clearer separation of the public RSA interface,
intended to be used by end-users, and the helper functions which are publicly
provided only for the benefit of designers of alternative RSA implementations.
diff --git a/tests/suites/test_suite_rsa.function b/tests/suites/test_suite_rsa.function
index 9ee8ea1..3f892f7 100644
--- a/tests/suites/test_suite_rsa.function
+++ b/tests/suites/test_suite_rsa.function
@@ -1,5 +1,6 @@
/* BEGIN_HEADER */
#include "mbedtls/rsa.h"
+#include "mbedtls/rsa_internal.h"
#include "mbedtls/md2.h"
#include "mbedtls/md4.h"
#include "mbedtls/md5.h"