tests UPDATE add back PAM test
diff --git a/tests/test_pam.c b/tests/test_pam.c
new file mode 100644
index 0000000..a257a01
--- /dev/null
+++ b/tests/test_pam.c
@@ -0,0 +1,222 @@
+/**
+ * @file test_pam.c
+ * @author Roman Janota <xjanot04@fit.vutbr.cz>
+ * @brief libnetconf2 SSH Keyboard Interactive auth using PAM test
+ *
+ * @copyright
+ * Copyright (c) 2023 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <pthread.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <security/pam_appl.h>
+
+#include <cmocka.h>
+
+#include "tests/config.h"
+
+#define NC_ACCEPT_TIMEOUT 2000
+#define NC_PS_POLL_TIMEOUT 2000
+
+struct ly_ctx *ctx;
+
+struct test_state {
+ pthread_barrier_t barrier;
+};
+
+/* mock pam_start to just call pam_start_confdir instead */
+int __real_pam_start(const char *service_name, const char *user, const struct pam_conv *pam_conversation, pam_handle_t **pamh);
+int
+__wrap_pam_start(const char *service_name, const char *user, const struct pam_conv *pam_conversation, pam_handle_t **pamh)
+{
+ return pam_start_confdir(service_name, user, pam_conversation, BUILD_DIR "/tests", pamh);
+}
+
+static void *
+server_thread(void *arg)
+{
+ int ret;
+ NC_MSG_TYPE msgtype;
+ struct nc_session *session;
+ struct nc_pollsession *ps;
+ struct test_state *state = arg;
+
+ ps = nc_ps_new();
+ assert_non_null(ps);
+
+ /* accept a session and add it to the poll session structure */
+ pthread_barrier_wait(&state->barrier);
+ msgtype = nc_accept(NC_ACCEPT_TIMEOUT, ctx, &session);
+ assert_int_equal(msgtype, NC_MSG_HELLO);
+
+ ret = nc_ps_add_session(ps, session);
+ assert_int_equal(ret, 0);
+
+ do {
+ ret = nc_ps_poll(ps, NC_PS_POLL_TIMEOUT, NULL);
+ assert_int_equal(ret & NC_PSPOLL_RPC, NC_PSPOLL_RPC);
+ } while (!(ret & NC_PSPOLL_SESSION_TERM));
+
+ nc_ps_clear(ps, 1, NULL);
+ nc_ps_free(ps);
+ return NULL;
+}
+
+static char *
+auth_interactive(const char *UNUSED(auth_name), const char *UNUSED(instruction),
+ const char *prompt, int UNUSED(echo), void *UNUSED(priv))
+{
+ /* send the replies to keyboard-interactive authentication */
+ if (strstr(prompt, "backwards")) {
+ return strdup("tset");
+ } else if (strstr(prompt, "1+1")) {
+ return strdup("2");
+ } else {
+ return NULL;
+ }
+}
+
+static void *
+client_thread(void *arg)
+{
+ int ret;
+ struct nc_session *session = NULL;
+ struct test_state *state = arg;
+
+ /* skip all hostkey and known_hosts checks */
+ nc_client_ssh_set_knownhosts_mode(NC_SSH_KNOWNHOSTS_SKIP);
+
+ ret = nc_client_set_schema_searchpath(MODULES_DIR);
+ assert_int_equal(ret, 0);
+
+ ret = nc_client_ssh_set_username("test");
+ assert_int_equal(ret, 0);
+
+ /* set keyboard-interactive authentication callback */
+ nc_client_ssh_set_auth_interactive_clb(auth_interactive, NULL);
+
+ pthread_barrier_wait(&state->barrier);
+ session = nc_connect_ssh("127.0.0.1", 10005, NULL);
+ assert_non_null(session);
+
+ nc_session_free(session, NULL);
+ return NULL;
+}
+
+static void
+test_nc_pam(void **state)
+{
+ int ret, i;
+ pthread_t tids[2];
+
+ assert_non_null(state);
+
+ ret = pthread_create(&tids[0], NULL, client_thread, *state);
+ assert_int_equal(ret, 0);
+ ret = pthread_create(&tids[1], NULL, server_thread, *state);
+ assert_int_equal(ret, 0);
+
+ for (i = 0; i < 2; i++) {
+ pthread_join(tids[i], NULL);
+ }
+}
+
+static int
+setup_f(void **state)
+{
+ int ret;
+ struct lyd_node *tree = NULL;
+ struct test_state *test_state;
+
+ nc_verbosity(NC_VERB_VERBOSE);
+
+ /* init barrier */
+ test_state = malloc(sizeof *test_state);
+ assert_non_null(test_state);
+
+ ret = pthread_barrier_init(&test_state->barrier, NULL, 2);
+ assert_int_equal(ret, 0);
+
+ *state = test_state;
+
+ ret = ly_ctx_new(MODULES_DIR, 0, &ctx);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_init_ctx(&ctx);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_config_load_modules(&ctx);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_config_add_address_port(ctx, "endpt", NC_TI_LIBSSH, "127.0.0.1", 10005, &tree);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_config_add_ssh_hostkey(ctx, "endpt", "hostkey", TESTS_DIR "/data/key_ecdsa", NULL, &tree);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_config_add_ssh_user_interactive(ctx, "endpt", "test", &tree);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_ssh_set_pam_conf_filename("netconf.conf");
+ assert_int_equal(ret, 0);
+
+ /* configure the server based on the data */
+ ret = nc_server_config_setup_data(tree);
+ assert_int_equal(ret, 0);
+
+ ret = nc_server_init();
+ assert_int_equal(ret, 0);
+
+ /* initialize client */
+ ret = nc_client_init();
+ assert_int_equal(ret, 0);
+
+ lyd_free_all(tree);
+
+ return 0;
+}
+
+static int
+teardown_f(void **state)
+{
+ int ret = 0;
+ struct test_state *test_state;
+
+ assert_non_null(state);
+ test_state = *state;
+
+ ret = pthread_barrier_destroy(&test_state->barrier);
+ assert_int_equal(ret, 0);
+
+ free(*state);
+ nc_client_destroy();
+ nc_server_destroy();
+ ly_ctx_destroy(ctx);
+
+ return 0;
+}
+
+int
+main(void)
+{
+ const struct CMUnitTest tests[] = {
+ cmocka_unit_test_setup_teardown(test_nc_pam, setup_f, teardown_f)
+ };
+
+ setenv("CMOCKA_TEST_ABORT", "1", 1);
+ return cmocka_run_group_tests(tests, NULL, NULL);
+}