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Support passing sudo_make_gidlist_item() an array of gids.

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The gids are formatted as strings, not gid_t.
This commit is contained in:
Todd C. Miller
2021-02-22 12:33:21 -07:00
parent f92080be62
commit 39db44b041
1 changed files with 37 additions and 7 deletions
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36
plugins/sudoers/pwutil_impl.c
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@@ -235,7 +235,7 @@ sudo_make_gritem(gid_t gid, const char *name)
* elements. Fills in datum from user_gids or from sudo_getgrouplist2(3).
*/
struct cache_item *
sudo_make_gidlist_item(const struct passwd *pw, char * const *unused1,
sudo_make_gidlist_item(const struct passwd *pw, char * const *gidstrs,
unsigned int type)
{
char *cp;
@@ -246,12 +246,42 @@ sudo_make_gidlist_item(const struct passwd *pw, char * const *unused1,
int i, ngids;
debug_decl(sudo_make_gidlist_item, SUDOERS_DEBUG_NSS);
/* Don't use user_gids if the entry type says we must query the db. */
if (type != ENTRY_TYPE_QUERIED && pw == sudo_user.pw && sudo_user.gids != NULL) {
/*
* Ignore supplied gids if the entry type says we must query the group db.
*/
if (type != ENTRY_TYPE_QUERIED && (gidstrs != NULL ||
(pw == sudo_user.pw && sudo_user.gids != NULL))) {
if (gidstrs != NULL) {
/* Use supplied gids list (string format). */
ngids = 1;
for (i = 0; gidstrs[i] != NULL; i++)
ngids++;
gids = reallocarray(NULL, ngids, sizeof(GETGROUPS_T));
if (gids == NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"unable to allocate memory");
debug_return_ptr(NULL);
}
ngids = 1;
gids[0] = pw->pw_gid;
for (i = 0; gidstrs[i] != NULL; i++) {
const char *errstr;
GETGROUPS_T gid = (gid_t) sudo_strtoid(gidstrs[i], &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_DIAG|SUDO_DEBUG_LINENO,
"gid %s %s", gidstrs[i], errstr);
continue;
}
if (gid != gids[0])
gids[ngids++] = gid;
}
} else {
/* Adopt sudo_user.gids. */
gids = user_gids;
ngids = user_ngids;
user_gids = NULL;
user_ngids = 0;
}
type = ENTRY_TYPE_FRONTEND;
} else {
type = ENTRY_TYPE_QUERIED;