knownhosts: Add ssh_session_export_known_hosts_entry()

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

tests/client/torture_knownhosts_verify.c

@@ -0,0 +1,121 @@
+/*
+ * This file is part of the SSH Library
+ *
+ * Copyright (c) 2018 by Andreas Schneider
+ *
+ * The SSH Library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ *
+ * The SSH Library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the SSH Library; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#define LIBSSH_STATIC
+
+#include "torture.h"
+
+#include <sys/types.h>
+#include <pwd.h>
+
+#include "knownhosts.c"
+
+#define TORTURE_KNOWN_HOSTS_FILE "libssh_torture_knownhosts"
+
+static int sshd_group_setup(void **state)
+{
+    torture_setup_sshd_server(state);
+
+    return 0;
+}
+
+static int sshd_group_teardown(void **state) {
+    torture_teardown_sshd_server(state);
+
+    return 0;
+}
+
+static int session_setup(void **state)
+{
+    struct torture_state *s = *state;
+    int verbosity = torture_libssh_verbosity();
+    struct passwd *pwd;
+
+    pwd = getpwnam("bob");
+    assert_non_null(pwd);
+    setuid(pwd->pw_uid);
+
+    s->ssh.session = ssh_new();
+    assert_non_null(s->ssh.session);
+
+    ssh_options_set(s->ssh.session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
+    ssh_options_set(s->ssh.session, SSH_OPTIONS_HOST, TORTURE_SSH_SERVER);
+
+    ssh_options_set(s->ssh.session, SSH_OPTIONS_USER, TORTURE_SSH_USER_ALICE);
+
+    return 0;
+}
+
+static int session_teardown(void **state)
+{
+    struct torture_state *s = *state;
+    char known_hosts_file[1024];
+
+    snprintf(known_hosts_file,
+             sizeof(known_hosts_file),
+             "%s/%s",
+             s->socket_dir,
+             TORTURE_KNOWN_HOSTS_FILE);
+
+    ssh_disconnect(s->ssh.session);
+    ssh_free(s->ssh.session);
+
+    unlink(known_hosts_file);
+
+    return 0;
+}
+
+#define KNOWN_HOST_ENTRY "127.0.0.10 ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAHOg+9vHW2kJB50j7c7WkcCcOtwgZdeXMpAeEl17sFnTTrT8wYo1FCzE07wV262vIC+AE3fXUJ7sJ/CkFIdk/8/gQEY1jyoXB3Bsee16VwhJGsMzGGh1FJ0XXhRJjUbG18qbH9JiSgE1N4fIM0zJG68fAyUxRxCI1wUobOOB7EmFZd18g==\n"
+static void torture_knownhosts_export(void **state)
+{
+    struct torture_state *s = *state;
+    ssh_session session = s->ssh.session;
+    char *entry = NULL;
+    int rc;
+
+    rc = ssh_connect(session);
+    assert_int_equal(rc, SSH_OK);
+
+    rc = ssh_session_export_known_hosts_entry(session, &entry);
+    assert_int_equal(rc, SSH_OK);
+
+    assert_string_equal(entry, KNOWN_HOST_ENTRY);
+    SAFE_FREE(entry);
+}
+
+int torture_run_tests(void) {
+    int rc;
+    struct CMUnitTest tests[] = {
+        cmocka_unit_test_setup_teardown(torture_knownhosts_export,
+                                        session_setup,
+                                        session_teardown),
+    };
+
+    ssh_init();
+
+    torture_filter_tests(tests);
+    rc = cmocka_run_group_tests(tests, sshd_group_setup, sshd_group_teardown);
+
+    ssh_finalize();
+    return rc;
+}