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samba-mirror/nsswitch/nsstest.c
Bill Parker 9b58da9866 Fix bug 10025 - Lack of Sanity Checking in calls to malloc()/calloc().
In reviewing various files in Samba-4.0.7, I found a number
of instances where malloc()/calloc() were called without the
checking the return value for a value of NULL, which would
indicate failure.

(NB. The changes needed to ccan, iniparser, popt and heimdal
will be reported upstream, not patched inside Samba).

Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Simo Source <idra@samba.org>
2013-07-17 16:12:19 -07:00

493 lines
11 KiB
C

/*
Unix SMB/CIFS implementation.
nss tester for winbindd
Copyright (C) Andrew Tridgell 2001
Copyright (C) Tim Potter 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "nsswitch/nsstest.h"
static const char *so_path = "/lib/libnss_winbind.so";
static const char *nss_name = "winbind";
static int nss_errno;
static NSS_STATUS last_error;
static int total_errors;
static void *find_fn(const char *name)
{
char *s;
static void *h;
void *res;
if (asprintf(&s, "_nss_%s_%s", nss_name, name) < 0) {
exit(1);
}
if (!h) {
h = dlopen(so_path, RTLD_LAZY);
}
if (!h) {
printf("Can't open shared library %s\n", so_path);
exit(1);
}
res = dlsym(h, s);
if (!res) {
printf("Can't find function %s\n", s);
total_errors++;
free(s);
return NULL;
}
free(s);
return res;
}
static void report_nss_error(const char *who, NSS_STATUS status)
{
last_error = status;
total_errors++;
printf("ERROR %s: NSS_STATUS=%d %d (nss_errno=%d)\n",
who, status, NSS_STATUS_SUCCESS, nss_errno);
}
static struct passwd *nss_getpwent(void)
{
NSS_STATUS (*_nss_getpwent_r)(struct passwd *, char *,
size_t , int *) =
(NSS_STATUS (*)(struct passwd *, char *,
size_t, int *))find_fn("getpwent_r");
static struct passwd pwd;
static char buf[1000];
NSS_STATUS status;
if (!_nss_getpwent_r)
return NULL;
status = _nss_getpwent_r(&pwd, buf, sizeof(buf), &nss_errno);
if (status == NSS_STATUS_NOTFOUND) {
return NULL;
}
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("getpwent", status);
return NULL;
}
return &pwd;
}
static struct passwd *nss_getpwnam(const char *name)
{
NSS_STATUS (*_nss_getpwnam_r)(const char *, struct passwd *, char *,
size_t , int *) =
(NSS_STATUS (*)(const char *, struct passwd *, char *,
size_t, int *))find_fn("getpwnam_r");
static struct passwd pwd;
static char buf[1000];
NSS_STATUS status;
if (!_nss_getpwnam_r)
return NULL;
status = _nss_getpwnam_r(name, &pwd, buf, sizeof(buf), &nss_errno);
if (status == NSS_STATUS_NOTFOUND) {
return NULL;
}
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("getpwnam", status);
return NULL;
}
return &pwd;
}
static struct passwd *nss_getpwuid(uid_t uid)
{
NSS_STATUS (*_nss_getpwuid_r)(uid_t , struct passwd *, char *,
size_t , int *) =
(NSS_STATUS (*)(uid_t, struct passwd *, char *,
size_t, int *))find_fn("getpwuid_r");
static struct passwd pwd;
static char buf[1000];
NSS_STATUS status;
if (!_nss_getpwuid_r)
return NULL;
status = _nss_getpwuid_r(uid, &pwd, buf, sizeof(buf), &nss_errno);
if (status == NSS_STATUS_NOTFOUND) {
return NULL;
}
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("getpwuid", status);
return NULL;
}
return &pwd;
}
static void nss_setpwent(void)
{
NSS_STATUS (*_nss_setpwent)(void) =
(NSS_STATUS(*)(void))find_fn("setpwent");
NSS_STATUS status;
if (!_nss_setpwent)
return;
status = _nss_setpwent();
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("setpwent", status);
}
}
static void nss_endpwent(void)
{
NSS_STATUS (*_nss_endpwent)(void) =
(NSS_STATUS (*)(void))find_fn("endpwent");
NSS_STATUS status;
if (!_nss_endpwent)
return;
status = _nss_endpwent();
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("endpwent", status);
}
}
static struct group *nss_getgrent(void)
{
NSS_STATUS (*_nss_getgrent_r)(struct group *, char *,
size_t , int *) =
(NSS_STATUS (*)(struct group *, char *,
size_t, int *))find_fn("getgrent_r");
static struct group grp;
static char *buf;
static int buflen = 1024;
NSS_STATUS status;
if (!_nss_getgrent_r)
return NULL;
if (!buf)
buf = (char *)malloc(buflen);
again:
status = _nss_getgrent_r(&grp, buf, buflen, &nss_errno);
if (status == NSS_STATUS_TRYAGAIN) {
buflen *= 2;
buf = (char *)realloc(buf, buflen);
if (!buf) {
return NULL;
}
goto again;
}
if (status == NSS_STATUS_NOTFOUND) {
free(buf);
return NULL;
}
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("getgrent", status);
free(buf);
return NULL;
}
return &grp;
}
static struct group *nss_getgrnam(const char *name)
{
NSS_STATUS (*_nss_getgrnam_r)(const char *, struct group *, char *,
size_t , int *) =
(NSS_STATUS (*)(const char *, struct group *, char *,
size_t, int *))find_fn("getgrnam_r");
static struct group grp;
static char *buf;
static int buflen = 1000;
NSS_STATUS status;
if (!_nss_getgrnam_r)
return NULL;
if (!buf)
buf = (char *)malloc(buflen);
again:
status = _nss_getgrnam_r(name, &grp, buf, buflen, &nss_errno);
if (status == NSS_STATUS_TRYAGAIN) {
buflen *= 2;
buf = (char *)realloc(buf, buflen);
if (!buf) {
return NULL;
}
goto again;
}
if (status == NSS_STATUS_NOTFOUND) {
free(buf);
return NULL;
}
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("getgrnam", status);
free(buf);
return NULL;
}
return &grp;
}
static struct group *nss_getgrgid(gid_t gid)
{
NSS_STATUS (*_nss_getgrgid_r)(gid_t , struct group *, char *,
size_t , int *) =
(NSS_STATUS (*)(gid_t, struct group *, char *,
size_t, int *))find_fn("getgrgid_r");
static struct group grp;
static char *buf;
static int buflen = 1000;
NSS_STATUS status;
if (!_nss_getgrgid_r)
return NULL;
if (!buf)
buf = (char *)malloc(buflen);
again:
status = _nss_getgrgid_r(gid, &grp, buf, buflen, &nss_errno);
if (status == NSS_STATUS_TRYAGAIN) {
buflen *= 2;
buf = (char *)realloc(buf, buflen);
if (!buf) {
return NULL;
}
goto again;
}
if (status == NSS_STATUS_NOTFOUND) {
free(buf);
return NULL;
}
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("getgrgid", status);
free(buf);
return NULL;
}
return &grp;
}
static void nss_setgrent(void)
{
NSS_STATUS (*_nss_setgrent)(void) =
(NSS_STATUS (*)(void))find_fn("setgrent");
NSS_STATUS status;
if (!_nss_setgrent)
return;
status = _nss_setgrent();
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("setgrent", status);
}
}
static void nss_endgrent(void)
{
NSS_STATUS (*_nss_endgrent)(void) =
(NSS_STATUS (*)(void))find_fn("endgrent");
NSS_STATUS status;
if (!_nss_endgrent)
return;
status = _nss_endgrent();
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("endgrent", status);
}
}
static int nss_initgroups(char *user, gid_t group, gid_t **groups, long int *start, long int *size)
{
NSS_STATUS (*_nss_initgroups)(char *, gid_t , long int *,
long int *, gid_t **, long int , int *) =
(NSS_STATUS (*)(char *, gid_t, long int *,
long int *, gid_t **,
long int, int *))find_fn("initgroups_dyn");
NSS_STATUS status;
if (!_nss_initgroups)
return NSS_STATUS_UNAVAIL;
status = _nss_initgroups(user, group, start, size, groups, 0, &nss_errno);
if (status != NSS_STATUS_SUCCESS) {
report_nss_error("initgroups", status);
}
return status;
}
static void print_passwd(struct passwd *pwd)
{
printf("%s:%s:%lu:%lu:%s:%s:%s\n",
pwd->pw_name,
pwd->pw_passwd,
(unsigned long)pwd->pw_uid,
(unsigned long)pwd->pw_gid,
pwd->pw_gecos,
pwd->pw_dir,
pwd->pw_shell);
}
static void print_group(struct group *grp)
{
int i;
printf("%s:%s:%lu:",
grp->gr_name,
grp->gr_passwd,
(unsigned long)grp->gr_gid);
if (!grp->gr_mem[0]) {
printf("\n");
return;
}
for (i=0; grp->gr_mem[i+1]; i++) {
printf("%s,", grp->gr_mem[i]);
}
printf("%s\n", grp->gr_mem[i]);
}
static void nss_test_initgroups(char *name, gid_t gid)
{
long int size = 16;
long int start = 1;
gid_t *groups = NULL;
int i;
NSS_STATUS status;
groups = (gid_t *)malloc(sizeof(gid_t) * size);
if (groups == NULL) {
printf("Unable to allocate memory for groups\n");
return;
}
groups[0] = gid;
status = nss_initgroups(name, gid, &groups, &start, &size);
if (status == NSS_STATUS_UNAVAIL) {
printf("No initgroups fn\n");
return;
}
for (i=0; i<start-1; i++) {
printf("%lu, ", (unsigned long)groups[i]);
}
printf("%lu\n", (unsigned long)groups[i]);
}
static void nss_test_users(void)
{
struct passwd *pwd;
nss_setpwent();
/* loop over all users */
while ((pwd = nss_getpwent())) {
printf("Testing user %s\n", pwd->pw_name);
printf("getpwent: "); print_passwd(pwd);
pwd = nss_getpwuid(pwd->pw_uid);
if (!pwd) {
total_errors++;
printf("ERROR: can't getpwuid\n");
continue;
}
printf("getpwuid: "); print_passwd(pwd);
pwd = nss_getpwnam(pwd->pw_name);
if (!pwd) {
total_errors++;
printf("ERROR: can't getpwnam\n");
continue;
}
printf("getpwnam: "); print_passwd(pwd);
printf("initgroups: "); nss_test_initgroups(pwd->pw_name, pwd->pw_gid);
printf("\n");
}
nss_endpwent();
}
static void nss_test_groups(void)
{
struct group *grp;
nss_setgrent();
/* loop over all groups */
while ((grp = nss_getgrent())) {
printf("Testing group %s\n", grp->gr_name);
printf("getgrent: "); print_group(grp);
grp = nss_getgrnam(grp->gr_name);
if (!grp) {
total_errors++;
printf("ERROR: can't getgrnam\n");
continue;
}
printf("getgrnam: "); print_group(grp);
grp = nss_getgrgid(grp->gr_gid);
if (!grp) {
total_errors++;
printf("ERROR: can't getgrgid\n");
continue;
}
printf("getgrgid: "); print_group(grp);
printf("\n");
}
nss_endgrent();
}
static void nss_test_errors(void)
{
struct passwd *pwd;
struct group *grp;
pwd = getpwnam("nosuchname");
if (pwd || last_error != NSS_STATUS_NOTFOUND) {
total_errors++;
printf("ERROR Non existent user gave error %d\n", last_error);
}
pwd = getpwuid(0xFFF0);
if (pwd || last_error != NSS_STATUS_NOTFOUND) {
total_errors++;
printf("ERROR Non existent uid gave error %d\n", last_error);
}
grp = getgrnam("nosuchgroup");
if (grp || last_error != NSS_STATUS_NOTFOUND) {
total_errors++;
printf("ERROR Non existent group gave error %d\n", last_error);
}
grp = getgrgid(0xFFF0);
if (grp || last_error != NSS_STATUS_NOTFOUND) {
total_errors++;
printf("ERROR Non existent gid gave error %d\n", last_error);
}
}
int main(int argc, char *argv[])
{
if (argc > 1) so_path = argv[1];
if (argc > 2) nss_name = argv[2];
nss_test_users();
nss_test_groups();
nss_test_errors();
printf("total_errors=%d\n", total_errors);
return total_errors;
}