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/*
* Check pam_localuser return values.
*
* Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
*/
#include "test_assert.h"
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <security/pam_appl.h>
#define MODULE_NAME "pam_localuser"
#define TEST_NAME "tst-" MODULE_NAME "-retval"
static const char service_file[] = TEST_NAME ".service";
static const char passwd_file[] = TEST_NAME ".passwd";
static const char missing_file[] = TEST_NAME ".missing";
static const char alice_line[] = "alice:x:1001:1001:Alice:/home/alice:";
static const char bob_line[] = "bob:x:1002:1002:Bob:/home/bob:";
static const char craig_prefix[] = ":x:1003:1003:";
static const char craig_suffix[] = "craig:/home/craig:";
int
main(void)
{
static struct pam_conv conv;
pam_handle_t *pamh = NULL;
FILE *fp;
char cwd[PATH_MAX];
char name[BUFSIZ];
ASSERT_NE(NULL, getcwd(cwd, sizeof(cwd)));
/* default passwd */
ASSERT_NE(NULL, fp = fopen(service_file, "w"));
ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
"auth required %s/.libs/%s.so\n",
cwd, MODULE_NAME));
ASSERT_EQ(0, fclose(fp));
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SERVICE_ERR, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
memset(name, 'x', sizeof(name) - 1);
name[sizeof(name) - 1] = '\0';
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, name, &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SERVICE_ERR, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "root:x", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_PERM_DENIED, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
/* missing passwd file */
ASSERT_NE(NULL, fp = fopen(service_file, "w"));
ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
"auth required %s/.libs/%s.so file=%s\n",
cwd, MODULE_NAME, missing_file));
ASSERT_EQ(0, fclose(fp));
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "root", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SERVICE_ERR, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
/* custom passwd file */
ASSERT_NE(NULL, fp = fopen(service_file, "w"));
ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
"auth required %s/.libs/%s.so file=%s\n",
cwd, MODULE_NAME, passwd_file));
ASSERT_EQ(0, fclose(fp));
memcpy(name + (sizeof(name) - sizeof(craig_prefix)),
craig_prefix, sizeof(craig_prefix));
ASSERT_NE(NULL, fp = fopen(passwd_file, "w"));
ASSERT_LT(0, fprintf(fp, "%s\n%s\n%s%s\n",
alice_line, bob_line, name, craig_suffix));
ASSERT_EQ(0, fclose(fp));
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SERVICE_ERR, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
memset(name, 'x', sizeof(name) - 1);
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, name, &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SERVICE_ERR, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "alice", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "bob", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "alice:x", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_PERM_DENIED, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(PAM_SUCCESS,
pam_start_confdir(service_file, "craig", &conv, ".", &pamh));
ASSERT_NE(NULL, pamh);
ASSERT_EQ(PAM_PERM_DENIED, pam_authenticate(pamh, 0));
ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
pamh = NULL;
ASSERT_EQ(0, unlink(service_file));
ASSERT_EQ(0, unlink(passwd_file));
return 0;
}
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