pam_echo: add a test for return values

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

1 files changed, 101 insertions, 0 deletions

diff --git a/modules/pam_echo/tst-pam_echo-retval.c b/modules/pam_echo/tst-pam_echo-retval.c
new file mode 100644
index 00000000..2374b71a
--- /dev/null
+++ b/modules/pam_echo/tst-pam_echo-retval.c
@@ -0,0 +1,101 @@
+/*
+ * Check pam_echo return values.
+ *
+ * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
+ */
+
+#include "test_assert.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <security/pam_appl.h>
+
+#define MODULE_NAME "pam_echo"
+#define TEST_NAME "tst-" MODULE_NAME "-retval"
+
+static const char service_file[] = TEST_NAME ".service";
+static const char user_name[] = "";
+static struct pam_conv conv;
+
+int
+main(void)
+{
+	pam_handle_t *pamh = NULL;
+	FILE *fp;
+	char cwd[PATH_MAX];
+
+	ASSERT_NE(NULL, getcwd(cwd, sizeof(cwd)));
+
+	/* PAM_SUCCESS -> PAM_SUCCESS, PAM_IGNORE -> PAM_PERM_DENIED */
+	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_name, &conv, ".", &pamh));
+	ASSERT_NE(NULL, pamh);
+	ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, 0));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_setcred(pamh, 0));
+	ASSERT_EQ(PAM_SUCCESS, pam_acct_mgmt(pamh, 0));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_chauthtok(pamh, 0));
+	ASSERT_EQ(PAM_SUCCESS, 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_SILENT: PAM_IGNORE -> PAM_PERM_DENIED */
+	ASSERT_EQ(PAM_SUCCESS,
+		  pam_start_confdir(service_file, user_name, &conv, ".", &pamh));
+	ASSERT_NE(NULL, pamh);
+	ASSERT_EQ(PAM_PERM_DENIED, pam_authenticate(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_setcred(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_acct_mgmt(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_chauthtok(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_open_session(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_PERM_DENIED, pam_close_session(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+	pamh = NULL;
+
+	/* PAM_IGNORE -> 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\n"
+			     "auth required %s/../pam_permit/.libs/pam_permit.so\n"
+			     "account required %s/.libs/%s.so\n"
+			     "account required %s/../pam_permit/.libs/pam_permit.so\n"
+			     "password required %s/.libs/%s.so\n"
+			     "password required %s/../pam_permit/.libs/pam_permit.so\n"
+			     "session required %s/.libs/%s.so\n"
+			     "session required %s/../pam_permit/.libs/pam_permit.so\n",
+			     cwd, MODULE_NAME, cwd,
+			     cwd, MODULE_NAME, cwd,
+			     cwd, MODULE_NAME, cwd,
+			     cwd, MODULE_NAME, cwd));
+	ASSERT_EQ(0, fclose(fp));
+
+	ASSERT_EQ(PAM_SUCCESS,
+		  pam_start_confdir(service_file, user_name, &conv, ".", &pamh));
+	ASSERT_NE(NULL, pamh);
+	ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_setcred(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_acct_mgmt(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_chauthtok(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_open_session(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_close_session(pamh, PAM_SILENT));
+	ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+	pamh = NULL;
+
+	ASSERT_EQ(0, unlink(service_file));
+
+	return 0;
+}