tests: ssl: Add max_early_data_size option

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/include/test/ssl_helpers.h b/tests/include/test/ssl_helpers.h
index 5b071f7..71259d6 100644
--- a/tests/include/test/ssl_helpers.h
+++ b/tests/include/test/ssl_helpers.h
@@ -114,6 +114,7 @@
     void (*cli_log_fun)(void *, int, const char *, int, const char *);
     int resize_buffers;
     int early_data;
+    int max_early_data_size;
 #if defined(MBEDTLS_SSL_CACHE_C)
     mbedtls_ssl_cache_context *cache;
 #endif
diff --git a/tests/src/test_helpers/ssl_helpers.c b/tests/src/test_helpers/ssl_helpers.c
index 7a28bd8..bf29b47 100644
--- a/tests/src/test_helpers/ssl_helpers.c
+++ b/tests/src/test_helpers/ssl_helpers.c
@@ -68,6 +68,7 @@
     opts->legacy_renegotiation = MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION;
     opts->resize_buffers = 1;
     opts->early_data = MBEDTLS_SSL_EARLY_DATA_DISABLED;
+    opts->max_early_data_size = -1;
 #if defined(MBEDTLS_SSL_CACHE_C)
     TEST_CALLOC(opts->cache, 1);
     mbedtls_ssl_cache_init(opts->cache);
@@ -815,6 +816,13 @@
 
 #if defined(MBEDTLS_SSL_EARLY_DATA)
     mbedtls_ssl_conf_early_data(&(ep->conf), options->early_data);
+#if defined(MBEDTLS_SSL_SRV_C)
+    if (endpoint_type == MBEDTLS_SSL_IS_SERVER &&
+        (options->max_early_data_size >= 0)) {
+        mbedtls_ssl_conf_max_early_data_size(&(ep->conf),
+                                             options->max_early_data_size);
+    }
+#endif
 #endif
 
 #if defined(MBEDTLS_SSL_CACHE_C) && defined(MBEDTLS_SSL_SRV_C)