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/*
* Check pam_canonicalize_user return values.
*
* Copyright (c) 2023 Dmitry V. Levin <ldv@strace.io>
*/
#include "test_assert.h"
#include <errno.h>
#include <limits.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <security/pam_appl.h>
#define MODULE_NAME "pam_canonicalize_user"
#define TEST_NAME "tst-" MODULE_NAME "-retval"
static const char service_file[] = TEST_NAME ".service";
static struct pam_conv null_conv;
static int
again_conv_func(int num_msg UNUSED, const struct pam_message **msg UNUSED,
struct pam_response **resp UNUSED, void *appdata_ptr UNUSED)
{
return PAM_CONV_AGAIN;
}
static struct pam_conv again_conv = { .conv = again_conv_func };
#ifdef HAVE_GETPWNAM_R
int
getpwnam_r(const char *name, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result)
{
if (strcmp(name, "root") == 0 ||
strcmp(name, "ROOT") == 0)
return getpwuid_r(0, pwd, buf, buflen, result);
*result = NULL;
return 0;
}
#else /* !HAVE_GETPWNAM_R */
struct passwd *
getpwnam(const char *name)
{
if (strcmp(name, "root") == 0 ||
strcmp(name, "ROOT") == 0)
return getpwuid(0);
errno = 0;
return NULL;
}
#endif /* !HAVE_GETPWNAM_R */
int
main(void)
{
pam_handle_t *pamh = NULL;
FILE *fp;
char cwd[PATH_MAX];
ASSERT_NE(NULL, getcwd(cwd, sizeof(cwd)));
struct passwd *pw;
ASSERT_NE(NULL, (pw = getpwuid(0)));
ASSERT_EQ(0, strcmp("root", pw->pw_name));
/* 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, ":", &null_conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_USER_UNKNOWN, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_PERM_DENIED, 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_MODULE_UNKNOWN, pam_open_session(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_close_session(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
/* 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, "root", &null_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_MODULE_UNKNOWN, pam_acct_mgmt(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_chauthtok(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_open_session(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_close_session(pamh, 0));
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, "root", &null_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_MODULE_UNKNOWN, pam_acct_mgmt(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_chauthtok(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_open_session(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_close_session(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
/* PAM_INCOMPLETE */
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, NULL, &again_conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_INCOMPLETE, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_ABORT, pam_setcred(pamh, 0));
ASSERT_EQ(PAM_ABORT, pam_acct_mgmt(pamh, 0));
ASSERT_EQ(PAM_ABORT, pam_chauthtok(pamh, 0));
ASSERT_EQ(PAM_ABORT, pam_open_session(pamh, 0));
ASSERT_EQ(PAM_ABORT, pam_close_session(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
/* PAM_IGNORE -> PAM_SUCCESS, "ROOT" -> "root" */
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_succeed_if/.libs/pam_succeed_if.so user = root\n"
"account required %s/.libs/%s.so\n"
"account required %s/../pam_succeed_if/.libs/pam_succeed_if.so user = root\n"
"password required %s/.libs/%s.so\n"
"password required %s/../pam_succeed_if/.libs/pam_succeed_if.so user = root\n"
"session required %s/.libs/%s.so\n"
"session required %s/../pam_succeed_if/.libs/pam_succeed_if.so user = root\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, "ROOT", &null_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_MODULE_UNKNOWN, pam_acct_mgmt(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_chauthtok(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_open_session(pamh, 0));
ASSERT_EQ(PAM_MODULE_UNKNOWN, pam_close_session(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(0, unlink(service_file));
return 0;
}
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