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/*
* Check pam_env return values.
*
* Copyright (c) 2020-2022 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2022 Stefan Schubert <schubi@suse.de>
*/
#include "test_assert.h"
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <security/pam_appl.h>
#define MODULE_NAME "pam_env"
#define TEST_NAME "tst-" MODULE_NAME "-retval"
static const char service_file[] = TEST_NAME ".service";
static const char missing_file[] = TEST_NAME ".missing";
static const char my_conf[] = TEST_NAME ".conf";
static const char my_env[] = TEST_NAME ".env";
static struct pam_conv conv;
static void
setup(void)
{
FILE *fp;
ASSERT_NE(NULL, fp = fopen(my_conf, "w"));
ASSERT_LT(0, fprintf(fp,
"EDITOR\tDEFAULT=vim\n"
"PAGER\tDEFAULT=more\n"));
ASSERT_EQ(0, fclose(fp));
ASSERT_NE(NULL, fp = fopen(my_env, "w"));
ASSERT_LT(0, fprintf(fp,
"test_value=foo\n"
"test2_value=bar\n"));
ASSERT_EQ(0, fclose(fp));
}
static void
cleanup(void)
{
ASSERT_EQ(0, unlink(my_conf));
ASSERT_EQ(0, unlink(my_env));
}
static void
check_array(const char **array1, char **array2)
{
for (const char **a1 = array1; *a1 != NULL; ++a1) {
char **a2;
for (a2 = array2; *a2 != NULL; ++a2) {
if (strcmp(*a1, *a2) == 0)
break;
}
ASSERT_NE(NULL, *a2);
}
}
static void
check_env(const char **list)
{
pam_handle_t *pamh = NULL;
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SUCCESS, pam_open_session(pamh, 0));
char **env_list = pam_getenvlist(pamh);
ASSERT_NE(NULL, env_list);
check_array(list, env_list);
for (char **e = env_list; *e != NULL; ++e)
free(*e);
free(env_list);
ASSERT_EQ(PAM_SUCCESS, pam_close_session(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
}
int
main(void)
{
pam_handle_t *pamh = NULL;
FILE *fp;
char cwd[PATH_MAX];
ASSERT_NE(NULL, getcwd(cwd, sizeof(cwd)));
setup();
/*
* When conffile= specifies a missing file, all methods except
* pam_sm_acct_mgmt and pam_sm_chauthtok return PAM_IGNORE.
* The return code of the stack where every module returns PAM_IGNORE
* is 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 conffile=%s/%s\n"
"account required %s/.libs/%s.so conffile=%s/%s\n"
"password required %s/.libs/%s.so conffile=%s/%s\n"
"session required %s/.libs/%s.so conffile=%s/%s\n",
cwd, MODULE_NAME, cwd, missing_file,
cwd, MODULE_NAME, cwd, missing_file,
cwd, MODULE_NAME, cwd, missing_file,
cwd, MODULE_NAME, cwd, missing_file));
ASSERT_EQ(0, fclose(fp));
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_PERM_DENIED, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_PERM_DENIED, pam_setcred(pamh, 0));
ASSERT_EQ(PAM_SERVICE_ERR, pam_acct_mgmt(pamh, 0));
ASSERT_EQ(PAM_SERVICE_ERR, pam_chauthtok(pamh, 0));
ASSERT_EQ(PAM_PERM_DENIED, 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;
/*
* When conffile= specifies a missing file, all methods except
* pam_sm_acct_mgmt and pam_sm_chauthtok return PAM_IGNORE.
* pam_permit is added after pam_env to convert PAM_IGNORE to 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 conffile=%s/%s\n"
"auth required %s/../pam_permit/.libs/pam_permit.so\n"
"account required %s/.libs/%s.so conffile=%s/%s\n"
"account required %s/../pam_permit/.libs/pam_permit.so\n"
"password required %s/.libs/%s.so conffile=%s/%s\n"
"password required %s/../pam_permit/.libs/pam_permit.so\n"
"session required %s/.libs/%s.so conffile=%s/%s\n"
"session required %s/../pam_permit/.libs/pam_permit.so\n",
cwd, MODULE_NAME, cwd, missing_file, cwd,
cwd, MODULE_NAME, cwd, missing_file, cwd,
cwd, MODULE_NAME, cwd, missing_file, cwd,
cwd, MODULE_NAME, cwd, missing_file, cwd));
ASSERT_EQ(0, fclose(fp));
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_setcred(pamh, 0));
ASSERT_EQ(PAM_SERVICE_ERR, pam_acct_mgmt(pamh, 0));
ASSERT_EQ(PAM_SERVICE_ERR, 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;
/*
* conffile= specifies an existing file,
* envfile= specifies an empty file.
*/
ASSERT_NE(NULL, fp = fopen(service_file, "w"));
ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
"session required %s/.libs/%s.so"
" conffile=%s/%s envfile=%s\n",
cwd, MODULE_NAME,
cwd, my_conf, "/dev/null"));
ASSERT_EQ(0, fclose(fp));
const char *env1[] = { "EDITOR=vim", "PAGER=more", NULL };
check_env(env1);
/*
* conffile= specifies an empty file,
* envfile= specifies an existing file.
*/
ASSERT_NE(NULL, fp = fopen(service_file, "w"));
ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
"session required %s/.libs/%s.so"
" conffile=%s envfile=%s/%s\n",
cwd, MODULE_NAME,
"/dev/null", cwd, my_env));
ASSERT_EQ(0, fclose(fp));
const char *env2[] = { "test_value=foo", "test2_value=bar", NULL };
check_env(env2);
/* cleanup */
cleanup();
ASSERT_EQ(0, unlink(service_file));
return 0;
}
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