pam_mkhomedir: add a test for return values

* modules/pam_mkhomedir/tst-pam_mkhomedir-retval.c: New file.
* modules/pam_mkhomedir/Makefile.am (TESTS): Add $(check_PROGRAMS).
(check_PROGRAMS, tst_pam_mkhomedir_retval_LDADD): New variables.

1 files changed, 110 insertions, 0 deletions

diff --git a/modules/pam_mkhomedir/tst-pam_mkhomedir-retval.c b/modules/pam_mkhomedir/tst-pam_mkhomedir-retval.c
new file mode 100644
index 00000000..451d2e56
--- /dev/null
+++ b/modules/pam_mkhomedir/tst-pam_mkhomedir-retval.c
@@ -0,0 +1,110 @@
+/*
+ * Check pam_mkhomedir return values.
+ *
+ * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
+ */
+
+#include "test_assert.h"
+
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <sys/stat.h>
+#include <security/pam_appl.h>
+
+#define MODULE_NAME "pam_mkhomedir"
+#define TEST_NAME "tst-" MODULE_NAME "-retval"
+
+static const char service_file[] = TEST_NAME ".service";
+static const char user_empty[] = "";
+static const char user_missing[] = ":";
+static struct pam_conv conv;
+
+int
+main(void)
+{
+	pam_handle_t *pamh = NULL;
+	FILE *fp;
+	struct passwd *pw;
+	struct stat st;
+	char cwd[PATH_MAX];
+
+	ASSERT_NE(NULL, getcwd(cwd, sizeof(cwd)));
+
+	/* PAM_USER_UNKNOWN */
+	ASSERT_NE(NULL, fp = fopen(service_file, "w"));
+	ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
+			     "auth required %s/.libs/%s.so\n"
+			     "account required %s/.libs/%s.so\n"
+			     "password required %s/.libs/%s.so\n"
+			     "session required %s/.libs/%s.so\n",
+			     cwd, MODULE_NAME,
+			     cwd, MODULE_NAME,
+			     cwd, MODULE_NAME,
+			     cwd, MODULE_NAME));
+	ASSERT_EQ(0, fclose(fp));
+
+	ASSERT_EQ(PAM_SUCCESS,
+		  pam_start_confdir(service_file, user_empty,
+				    &conv, ".", &pamh));
+	ASSERT_NE(NULL, pamh);
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_authenticate(pamh, 0));
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_setcred(pamh, 0));
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_acct_mgmt(pamh, 0));
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_chauthtok(pamh, 0));
+	ASSERT_EQ(PAM_USER_UNKNOWN, pam_open_session(pamh, 0));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_close_session(pamh, 0));
+	ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+	pamh = NULL;
+
+	ASSERT_EQ(PAM_SUCCESS,
+		  pam_start_confdir(service_file, user_missing,
+				    &conv, ".", &pamh));
+	ASSERT_NE(NULL, pamh);
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_authenticate(pamh, 0));
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_setcred(pamh, 0));
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_acct_mgmt(pamh, 0));
+	ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_chauthtok(pamh, 0));
+	ASSERT_EQ(PAM_USER_UNKNOWN, pam_open_session(pamh, 0));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_close_session(pamh, 0));
+	ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+	pamh = NULL;
+
+	/* PAM_SUCCESS */
+	ASSERT_NE(NULL, fp = fopen(service_file, "w"));
+	ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
+			     "auth required %s/.libs/%s.so debug\n"
+			     "account required %s/.libs/%s.so debug\n"
+			     "password required %s/.libs/%s.so debug\n"
+			     "session required %s/.libs/%s.so debug\n",
+			     cwd, MODULE_NAME,
+			     cwd, MODULE_NAME,
+			     cwd, MODULE_NAME,
+			     cwd, MODULE_NAME));
+	ASSERT_EQ(0, fclose(fp));
+
+	if ((pw = getpwuid(geteuid())) != NULL &&
+	    pw->pw_dir != NULL &&
+	    stat(pw->pw_dir, &st) == 0 &&
+	    (st.st_mode & S_IFMT) == S_IFDIR) {
+		ASSERT_EQ(PAM_SUCCESS,
+			  pam_start_confdir(service_file, pw->pw_name,
+					    &conv, ".", &pamh));
+		ASSERT_NE(NULL, pamh);
+		ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_authenticate(pamh, 0));
+		ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_setcred(pamh, 0));
+		ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_acct_mgmt(pamh, 0));
+		ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_chauthtok(pamh, 0));
+		ASSERT_EQ(PAM_SUCCESS, pam_open_session(pamh, 0));
+		ASSERT_EQ(PAM_SUCCESS, pam_close_session(pamh, 0));
+		ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+		pamh = NULL;
+	}
+
+	ASSERT_EQ(0, unlink(service_file));
+
+	return 0;
+}