Add a test for mlaformed ECJPAKE context
diff --git a/tests/suites/test_suite_ecjpake.function b/tests/suites/test_suite_ecjpake.function
index d267295..38f190d 100644
--- a/tests/suites/test_suite_ecjpake.function
+++ b/tests/suites/test_suite_ecjpake.function
@@ -237,6 +237,27 @@
 /* END_CASE */
 
 /* BEGIN_CASE depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C */
+void read_bad_md( data_t *msg )
+{
+    mbedtls_ecjpake_context corrupt_ctx;
+    const unsigned char * pw = NULL;
+    const size_t pw_len = 0;
+    int any_role = MBEDTLS_ECJPAKE_CLIENT;
+
+    mbedtls_ecjpake_init( &corrupt_ctx );
+    TEST_ASSERT( mbedtls_ecjpake_setup( &corrupt_ctx, any_role,
+                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, pw_len ) == 0 );
+    corrupt_ctx.md_info = NULL;
+
+    TEST_ASSERT( mbedtls_ecjpake_read_round_one( &corrupt_ctx, msg->x,
+                 msg->len ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+exit:
+    mbedtls_ecjpake_free( &corrupt_ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C */
 void read_round_one( int role, data_t * msg, int ref_ret )
 {
     mbedtls_ecjpake_context ctx;