*/
#include "includes.h"
+#include "../librpc/gen_ndr/ndr_security.h"
+#include "secrets.h"
+#include "memcache.h"
+#include "idmap_cache.h"
+#include "../libcli/security/security.h"
/*****************************************************************
Dissect a user-provided name into domain, name, sid and type.
bool lookup_name(TALLOC_CTX *mem_ctx,
const char *full_name, int flags,
const char **ret_domain, const char **ret_name,
- DOM_SID *ret_sid, enum lsa_SidType *ret_type)
+ struct dom_sid *ret_sid, enum lsa_SidType *ret_type)
{
char *p;
const char *tmp;
const char *domain = NULL;
const char *name = NULL;
uint32 rid;
- DOM_SID sid;
+ struct dom_sid sid;
enum lsa_SidType type;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
* that (yet), but give it a chance. */
if (IS_DC && winbind_lookup_name("", name, &sid, &type)) {
- DOM_SID dom_sid;
+ struct dom_sid dom_sid;
uint32 tmp_rid;
enum lsa_SidType domain_type;
bool lookup_name_smbconf(TALLOC_CTX *mem_ctx,
const char *full_name, int flags,
const char **ret_domain, const char **ret_name,
- DOM_SID *ret_sid, enum lsa_SidType *ret_type)
+ struct dom_sid *ret_sid, enum lsa_SidType *ret_type)
{
char *qualified_name;
const char *p;
}
static bool wb_lookup_rids(TALLOC_CTX *mem_ctx,
- const DOM_SID *domain_sid,
+ const struct dom_sid *domain_sid,
int num_rids, uint32 *rids,
const char **domain_name,
const char **names, enum lsa_SidType *types)
return true;
}
-static bool lookup_rids(TALLOC_CTX *mem_ctx, const DOM_SID *domain_sid,
+static bool lookup_rids(TALLOC_CTX *mem_ctx, const struct dom_sid *domain_sid,
int num_rids, uint32_t *rids,
const char **domain_name,
const char ***names, enum lsa_SidType **types)
if (sid_check_is_wellknown_domain(domain_sid, NULL)) {
for (i=0; i<num_rids; i++) {
- DOM_SID sid;
+ struct dom_sid sid;
sid_compose(&sid, domain_sid, rids[i]);
if (lookup_wellknown_sid(mem_ctx, &sid,
domain_name, &(*names)[i])) {
* Is the SID a domain as such? If yes, lookup its name.
*/
-static bool lookup_as_domain(const DOM_SID *sid, TALLOC_CTX *mem_ctx,
+static bool lookup_as_domain(const struct dom_sid *sid, TALLOC_CTX *mem_ctx,
const char **name)
{
const char *tmp;
}
for (i=0; i<num_domains; i++) {
- if (sid_equal(sid, &domains[i]->sid)) {
+ if (dom_sid_equal(sid, &domains[i]->sid)) {
*name = talloc_strdup(mem_ctx,
domains[i]->name);
return true;
* Level 6: Like 4
*/
-static bool check_dom_sid_to_level(const DOM_SID *sid, int level)
+static bool check_dom_sid_to_level(const struct dom_sid *sid, int level)
{
int ret = false;
*/
NTSTATUS lookup_sids(TALLOC_CTX *mem_ctx, int num_sids,
- const DOM_SID **sids, int level,
+ const struct dom_sid **sids, int level,
struct lsa_dom_info **ret_domains,
struct lsa_name_info **ret_names)
{
*/
for (i=0; i<num_sids; i++) {
- DOM_SID sid;
- uint32 rid;
+ struct dom_sid sid;
+ uint32_t rid = 0;
const char *domain_name = NULL;
sid_copy(&sid, sids[i]);
if (!dom_infos[j].valid) {
break;
}
- if (sid_equal(&sid, &dom_infos[j].sid)) {
+ if (dom_sid_equal(&sid, &dom_infos[j].sid)) {
break;
}
}
*THE CANONICAL* convert SID to name function.
*****************************************************************/
-bool lookup_sid(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
+bool lookup_sid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
const char **ret_domain, const char **ret_name,
enum lsa_SidType *ret_type)
{
Find a SID given a uid.
*****************************************************************/
-static bool fetch_sid_from_uid_cache(DOM_SID *psid, uid_t uid)
+static bool fetch_sid_from_uid_cache(struct dom_sid *psid, uid_t uid)
{
DATA_BLOB cache_value;
memcpy(psid, cache_value.data, MIN(sizeof(*psid), cache_value.length));
SMB_ASSERT(cache_value.length >= offsetof(struct dom_sid, id_auth));
- SMB_ASSERT(cache_value.length == ndr_size_dom_sid(psid, NULL, 0));
+ SMB_ASSERT(cache_value.length == ndr_size_dom_sid(psid, 0));
return true;
}
Find a uid given a SID.
*****************************************************************/
-static bool fetch_uid_from_cache( uid_t *puid, const DOM_SID *psid )
+static bool fetch_uid_from_cache( uid_t *puid, const struct dom_sid *psid )
{
DATA_BLOB cache_value;
if (!memcache_lookup(NULL, SID_UID_CACHE,
- data_blob_const(psid, ndr_size_dom_sid(psid, NULL, 0)),
+ data_blob_const(psid, ndr_size_dom_sid(psid, 0)),
&cache_value)) {
return false;
}
Store uid to SID mapping in cache.
*****************************************************************/
-void store_uid_sid_cache(const DOM_SID *psid, uid_t uid)
+void store_uid_sid_cache(const struct dom_sid *psid, uid_t uid)
{
memcache_add(NULL, SID_UID_CACHE,
- data_blob_const(psid, ndr_size_dom_sid(psid, NULL, 0)),
+ data_blob_const(psid, ndr_size_dom_sid(psid, 0)),
data_blob_const(&uid, sizeof(uid)));
memcache_add(NULL, UID_SID_CACHE,
data_blob_const(&uid, sizeof(uid)),
- data_blob_const(psid, ndr_size_dom_sid(psid, NULL, 0)));
+ data_blob_const(psid, ndr_size_dom_sid(psid, 0)));
}
/*****************************************************************
Find a SID given a gid.
*****************************************************************/
-static bool fetch_sid_from_gid_cache(DOM_SID *psid, gid_t gid)
+static bool fetch_sid_from_gid_cache(struct dom_sid *psid, gid_t gid)
{
DATA_BLOB cache_value;
memcpy(psid, cache_value.data, MIN(sizeof(*psid), cache_value.length));
SMB_ASSERT(cache_value.length >= offsetof(struct dom_sid, id_auth));
- SMB_ASSERT(cache_value.length == ndr_size_dom_sid(psid, NULL, 0));
+ SMB_ASSERT(cache_value.length == ndr_size_dom_sid(psid, 0));
return true;
}
Find a gid given a SID.
*****************************************************************/
-static bool fetch_gid_from_cache(gid_t *pgid, const DOM_SID *psid)
+static bool fetch_gid_from_cache(gid_t *pgid, const struct dom_sid *psid)
{
DATA_BLOB cache_value;
if (!memcache_lookup(NULL, SID_GID_CACHE,
- data_blob_const(psid, ndr_size_dom_sid(psid, NULL, 0)),
+ data_blob_const(psid, ndr_size_dom_sid(psid, 0)),
&cache_value)) {
return false;
}
Store gid to SID mapping in cache.
*****************************************************************/
-void store_gid_sid_cache(const DOM_SID *psid, gid_t gid)
+void store_gid_sid_cache(const struct dom_sid *psid, gid_t gid)
{
memcache_add(NULL, SID_GID_CACHE,
- data_blob_const(psid, ndr_size_dom_sid(psid, NULL, 0)),
+ data_blob_const(psid, ndr_size_dom_sid(psid, 0)),
data_blob_const(&gid, sizeof(gid)));
memcache_add(NULL, GID_SID_CACHE,
data_blob_const(&gid, sizeof(gid)),
- data_blob_const(psid, ndr_size_dom_sid(psid, NULL, 0)));
+ data_blob_const(psid, ndr_size_dom_sid(psid, 0)));
}
/*****************************************************************
*THE LEGACY* convert uid_t to SID function.
*****************************************************************/
-static void legacy_uid_to_sid(DOM_SID *psid, uid_t uid)
+static void legacy_uid_to_sid(struct dom_sid *psid, uid_t uid)
{
bool ret;
*THE LEGACY* convert gid_t to SID function.
*****************************************************************/
-static void legacy_gid_to_sid(DOM_SID *psid, gid_t gid)
+static void legacy_gid_to_sid(struct dom_sid *psid, gid_t gid)
{
bool ret;
*THE LEGACY* convert SID to uid function.
*****************************************************************/
-static bool legacy_sid_to_uid(const DOM_SID *psid, uid_t *puid)
+static bool legacy_sid_to_uid(const struct dom_sid *psid, uid_t *puid)
{
enum lsa_SidType type;
Group mapping is used for gids that maps to Wellknown SIDs
*****************************************************************/
-static bool legacy_sid_to_gid(const DOM_SID *psid, gid_t *pgid)
+static bool legacy_sid_to_gid(const struct dom_sid *psid, gid_t *pgid)
{
GROUP_MAP map;
union unid_t id;
*THE CANONICAL* convert uid_t to SID function.
*****************************************************************/
-void uid_to_sid(DOM_SID *psid, uid_t uid)
+void uid_to_sid(struct dom_sid *psid, uid_t uid)
{
bool expired = true;
bool ret;
*THE CANONICAL* convert gid_t to SID function.
*****************************************************************/
-void gid_to_sid(DOM_SID *psid, gid_t gid)
+void gid_to_sid(struct dom_sid *psid, gid_t gid)
{
bool expired = true;
bool ret;
*THE CANONICAL* convert SID to uid function.
*****************************************************************/
-bool sid_to_uid(const DOM_SID *psid, uid_t *puid)
+bool sid_to_uid(const struct dom_sid *psid, uid_t *puid)
{
bool expired = true;
bool ret;
Group mapping is used for gids that maps to Wellknown SIDs
*****************************************************************/
-bool sid_to_gid(const DOM_SID *psid, gid_t *pgid)
+bool sid_to_gid(const struct dom_sid *psid, gid_t *pgid)
{
bool expired = true;
bool ret;
store_gid_sid_cache(psid, *pgid);
return true;
}
+
+/**
+ * @brief This function gets the primary group SID mapping the primary
+ * GID of the user as obtained by an actual getpwnam() call.
+ * This is necessary to avoid issues with arbitrary group SIDs
+ * stored in passdb. We try as hard as we can to get the SID
+ * corresponding to the GID, including trying group mapping.
+ * If nothing else works, we will force "Domain Users" as the
+ * primary group.
+ * This is needed because we must always be able to lookup the
+ * primary group SID, so we cannot settle for an arbitrary SID.
+ *
+ * This call can be expensive. Use with moderation.
+ * If you have a "samu" struct around use pdb_get_group_sid()
+ * instead as it does properly cache results.
+ *
+ * @param mem_ctx[in] The memory context iused to allocate the result.
+ * @param username[in] The user's name
+ * @param _pwd[in|out] If available, pass in user's passwd struct.
+ * It will contain a tallocated passwd if NULL was
+ * passed in.
+ * @param _group_sid[out] The user's Primary Group SID
+ *
+ * @return NTSTATUS error code.
+ */
+NTSTATUS get_primary_group_sid(TALLOC_CTX *mem_ctx,
+ const char *username,
+ struct passwd **_pwd,
+ struct dom_sid **_group_sid)
+{
+ TALLOC_CTX *tmp_ctx;
+ bool need_lookup_sid = false;
+ struct dom_sid *group_sid;
+ struct passwd *pwd = *_pwd;
+
+ tmp_ctx = talloc_new(mem_ctx);
+ if (!tmp_ctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (!pwd) {
+ pwd = Get_Pwnam_alloc(mem_ctx, username);
+ if (!pwd) {
+ DEBUG(0, ("Failed to find a Unix account for %s",
+ username));
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+ }
+
+ group_sid = talloc_zero(mem_ctx, struct dom_sid);
+ if (!group_sid) {
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ gid_to_sid(group_sid, pwd->pw_gid);
+ if (!is_null_sid(group_sid)) {
+ struct dom_sid domain_sid;
+ uint32_t rid;
+
+ /* We need a sid within our domain */
+ sid_copy(&domain_sid, group_sid);
+ sid_split_rid(&domain_sid, &rid);
+ if (dom_sid_equal(&domain_sid, get_global_sam_sid())) {
+ /*
+ * As shortcut for the expensive lookup_sid call
+ * compare the domain sid part
+ */
+ switch (rid) {
+ case DOMAIN_RID_ADMINS:
+ case DOMAIN_RID_USERS:
+ goto done;
+ default:
+ need_lookup_sid = true;
+ break;
+ }
+ } else {
+ /* Try group mapping */
+ ZERO_STRUCTP(group_sid);
+ if (pdb_gid_to_sid(pwd->pw_gid, group_sid)) {
+ need_lookup_sid = true;
+ }
+ }
+ }
+
+ /* We must verify that this is a valid SID that resolves to a
+ * group of the correct type */
+ if (need_lookup_sid) {
+ enum lsa_SidType type = SID_NAME_UNKNOWN;
+ bool lookup_ret;
+
+ DEBUG(10, ("do lookup_sid(%s) for group of user %s\n",
+ sid_string_dbg(group_sid), username));
+
+ /* Now check that it's actually a domain group and
+ * not something else */
+ lookup_ret = lookup_sid(tmp_ctx, group_sid,
+ NULL, NULL, &type);
+
+ if (lookup_ret && (type == SID_NAME_DOM_GRP)) {
+ goto done;
+ }
+
+ DEBUG(3, ("Primary group %s for user %s is"
+ " a %s and not a domain group\n",
+ sid_string_dbg(group_sid), username,
+ sid_type_lookup(type)));
+ }
+
+ /* Everything else, failed.
+ * Just set it to the 'Domain Users' RID of 513 which will
+ always resolve to a name */
+ DEBUG(3, ("Forcing Primary Group to 'Domain Users' for %s\n",
+ username));
+
+ sid_compose(group_sid, get_global_sam_sid(), DOMAIN_RID_USERS);
+
+done:
+ *_pwd = talloc_move(mem_ctx, &pwd);
+ *_group_sid = talloc_move(mem_ctx, &group_sid);
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_OK;
+}
git.samba.org / sfrench / samba-autobuild / .git / blobdiff