test: pake: add test for opaque password key

Signed-off-by: Valerio Setti <vsetti@baylibre.com>
diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index 3d9a6fd..01d4fe3 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -6237,12 +6237,23 @@
     {
         psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
 
-        psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
+        /* First try with an invalid usage */
+        psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
         psa_set_key_algorithm( &attributes, PSA_ALG_JPAKE );
         psa_set_key_type( &attributes, PSA_KEY_TYPE_PASSWORD );
 
         PSA_ASSERT( psa_import_key( &attributes, pwd_string,
                     pwd_len, &pwd_slot ) );
+
+        ECJPAKE_TEST_SET_PASSWORD( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
+
+        psa_destroy_key( pwd_slot );
+
+        /* Then set the correct usage */
+        psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
+
+        PSA_ASSERT( psa_import_key( &attributes, pwd_string,
+                    pwd_len, &pwd_slot ) );
     }
 #endif  /* MBEDTLS_USE_PSA_CRYPTO */