Check for a SID in an NT_USER_TOKEN
****************************************************************************/
-bool nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
+bool nt_token_check_sid ( const struct dom_sid *sid, const NT_USER_TOKEN *token )
{
int i;
bool nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
{
- DOM_SID domain_sid;
+ struct dom_sid domain_sid;
/* if we are a domain member, the get the domain SID, else for
a DC or standalone server, use our own SID */
NT_USER_TOKEN *get_root_nt_token( void )
{
struct nt_user_token *token, *for_cache;
- DOM_SID u_sid, g_sid;
+ struct dom_sid u_sid, g_sid;
struct passwd *pw;
void *cache_data;
* Add alias SIDs from memberships within the partially created token SID list
*/
-NTSTATUS add_aliases(const DOM_SID *domain_sid,
+NTSTATUS add_aliases(const struct dom_sid *domain_sid,
struct nt_user_token *token)
{
uint32 *aliases;
}
for (i=0; i<num_aliases; i++) {
- DOM_SID alias_sid;
+ struct dom_sid alias_sid;
sid_compose(&alias_sid, domain_sid, aliases[i]);
status = add_sid_to_array_unique(token, &alias_sid,
&token->user_sids,
*******************************************************************/
static NTSTATUS add_builtin_administrators(struct nt_user_token *token,
- const DOM_SID *dom_sid)
+ const struct dom_sid *dom_sid)
{
- DOM_SID domadm;
+ struct dom_sid domadm;
NTSTATUS status;
/* nothing to do if we aren't in a domain */
} else {
sid_copy(&domadm, dom_sid);
}
- sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
+ sid_append_rid( &domadm, DOMAIN_RID_ADMINS );
/* Add Administrators if the user beloongs to Domain Admins */
static NTSTATUS create_builtin(uint32 rid)
{
NTSTATUS status = NT_STATUS_OK;
- DOM_SID sid;
+ struct dom_sid sid;
gid_t gid;
if (!sid_compose(&sid, &global_sid_Builtin, rid)) {
* @param[in] dom_sid sid to add as a member of builtin_sid.
* @return Normal NTSTATUS return
*/
-static NTSTATUS add_sid_to_builtin(const DOM_SID *builtin_sid,
- const DOM_SID *dom_sid)
+static NTSTATUS add_sid_to_builtin(const struct dom_sid *builtin_sid,
+ const struct dom_sid *dom_sid)
{
NTSTATUS status = NT_STATUS_OK;
/*******************************************************************
*******************************************************************/
-NTSTATUS create_builtin_users(const DOM_SID *dom_sid)
+NTSTATUS create_builtin_users(const struct dom_sid *dom_sid)
{
NTSTATUS status;
- DOM_SID dom_users;
+ struct dom_sid dom_users;
- status = create_builtin(BUILTIN_ALIAS_RID_USERS);
+ status = create_builtin(BUILTIN_RID_USERS);
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(5,("create_builtin_users: Failed to create Users\n"));
return status;
/* add domain users */
if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
- && sid_compose(&dom_users, dom_sid, DOMAIN_GROUP_RID_USERS))
+ && sid_compose(&dom_users, dom_sid, DOMAIN_RID_USERS))
{
status = add_sid_to_builtin(&global_sid_Builtin_Users,
&dom_users);
/*******************************************************************
*******************************************************************/
-NTSTATUS create_builtin_administrators(const DOM_SID *dom_sid)
+NTSTATUS create_builtin_administrators(const struct dom_sid *dom_sid)
{
NTSTATUS status;
- DOM_SID dom_admins, root_sid;
+ struct dom_sid dom_admins, root_sid;
fstring root_name;
enum lsa_SidType type;
TALLOC_CTX *ctx;
bool ret;
- status = create_builtin(BUILTIN_ALIAS_RID_ADMINS);
+ status = create_builtin(BUILTIN_RID_ADMINISTRATORS);
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(5,("create_builtin_administrators: Failed to create Administrators\n"));
return status;
/* add domain admins */
if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
- && sid_compose(&dom_admins, dom_sid, DOMAIN_GROUP_RID_ADMINS))
+ && sid_compose(&dom_admins, dom_sid, DOMAIN_RID_ADMINS))
{
status = add_sid_to_builtin(&global_sid_Builtin_Administrators,
&dom_admins);
*******************************************************************/
struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
- const DOM_SID *user_sid,
+ const struct dom_sid *user_sid,
bool is_guest,
int num_groupsids,
- const DOM_SID *groupsids)
+ const struct dom_sid *groupsids)
{
struct nt_user_token *result = NULL;
int i;
NTSTATUS status;
gid_t gid;
- DOM_SID dom_sid;
+ struct dom_sid dom_sid;
DEBUG(10, ("Create local NT token for %s\n",
sid_string_dbg(user_sid)));
(long int)groups[i]));
}
+/*
+ * Create an artificial NT token given just a username. (Initially intended
+ * for force user)
+ *
+ * We go through lookup_name() to avoid problems we had with 'winbind use
+ * default domain'.
+ *
+ * We have 3 cases:
+ *
+ * unmapped unix users: Go directly to nss to find the user's group.
+ *
+ * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
+ *
+ * If the user is provided by winbind, the primary gid is set to "domain
+ * users" of the user's domain. For an explanation why this is necessary, see
+ * the thread starting at
+ * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
+ */
+
+NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
+ bool is_guest,
+ uid_t *uid, gid_t *gid,
+ char **found_username,
+ struct nt_user_token **token)
+{
+ NTSTATUS result = NT_STATUS_NO_SUCH_USER;
+ TALLOC_CTX *tmp_ctx = talloc_stackframe();
+ struct dom_sid user_sid;
+ enum lsa_SidType type;
+ gid_t *gids;
+ struct dom_sid *group_sids;
+ struct dom_sid unix_group_sid;
+ size_t num_group_sids;
+ size_t num_gids;
+ size_t i;
+
+ if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
+ NULL, NULL, &user_sid, &type)) {
+ DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
+ goto done;
+ }
+
+ if (type != SID_NAME_USER) {
+ DEBUG(1, ("%s is a %s, not a user\n", username,
+ sid_type_lookup(type)));
+ goto done;
+ }
+
+ if (sid_check_is_in_our_domain(&user_sid)) {
+ bool ret;
+
+ /* This is a passdb user, so ask passdb */
+
+ struct samu *sam_acct = NULL;
+
+ if ( !(sam_acct = samu_new( tmp_ctx )) ) {
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ become_root();
+ ret = pdb_getsampwsid(sam_acct, &user_sid);
+ unbecome_root();
+
+ if (!ret) {
+ DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
+ sid_string_dbg(&user_sid), username));
+ DEBUGADD(1, ("Fall back to unix user %s\n", username));
+ goto unix_user;
+ }
+
+ result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
+ &group_sids, &gids,
+ &num_group_sids);
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(1, ("enum_group_memberships failed for %s (%s): "
+ "%s\n", username, sid_string_dbg(&user_sid),
+ nt_errstr(result)));
+ DEBUGADD(1, ("Fall back to unix user %s\n", username));
+ goto unix_user;
+ }
+
+ /* see the smb_panic() in pdb_default_enum_group_memberships */
+ SMB_ASSERT(num_group_sids > 0);
+
+ *gid = gids[0];
+
+ /* Ensure we're returning the found_username on the right context. */
+ *found_username = talloc_strdup(mem_ctx,
+ pdb_get_username(sam_acct));
+
+ /*
+ * If the SID from lookup_name() was the guest sid, passdb knows
+ * about the mapping of guest sid to lp_guestaccount()
+ * username and will return the unix_pw info for a guest
+ * user. Use it if it's there, else lookup the *uid details
+ * using getpwnam_alloc(). See bug #6291 for details. JRA.
+ */
+
+ /* We must always assign the *uid. */
+ if (sam_acct->unix_pw == NULL) {
+ struct passwd *pwd = getpwnam_alloc(sam_acct, *found_username );
+ if (!pwd) {
+ DEBUG(10, ("getpwnam_alloc failed for %s\n",
+ *found_username));
+ result = NT_STATUS_NO_SUCH_USER;
+ goto done;
+ }
+ result = samu_set_unix(sam_acct, pwd );
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(10, ("samu_set_unix failed for %s\n",
+ *found_username));
+ result = NT_STATUS_NO_SUCH_USER;
+ goto done;
+ }
+ }
+ *uid = sam_acct->unix_pw->pw_uid;
+
+ } else if (sid_check_is_in_unix_users(&user_sid)) {
+
+ /* This is a unix user not in passdb. We need to ask nss
+ * directly, without consulting passdb */
+
+ struct passwd *pass;
+
+ /*
+ * This goto target is used as a fallback for the passdb
+ * case. The concrete bug report is when passdb gave us an
+ * unmapped gid.
+ */
+
+ unix_user:
+
+ if (!sid_to_uid(&user_sid, uid)) {
+ DEBUG(1, ("unix_user case, sid_to_uid for %s (%s) failed\n",
+ username, sid_string_dbg(&user_sid)));
+ result = NT_STATUS_NO_SUCH_USER;
+ goto done;
+ }
+
+ uid_to_unix_users_sid(*uid, &user_sid);
+
+ pass = getpwuid_alloc(tmp_ctx, *uid);
+ if (pass == NULL) {
+ DEBUG(1, ("getpwuid(%u) for user %s failed\n",
+ (unsigned int)*uid, username));
+ goto done;
+ }
+
+ if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
+ &gids, &num_group_sids)) {
+ DEBUG(1, ("getgroups_unix_user for user %s failed\n",
+ username));
+ goto done;
+ }
+
+ if (num_group_sids) {
+ group_sids = TALLOC_ARRAY(tmp_ctx, struct dom_sid, num_group_sids);
+ if (group_sids == NULL) {
+ DEBUG(1, ("TALLOC_ARRAY failed\n"));
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ } else {
+ group_sids = NULL;
+ }
+
+ for (i=0; i<num_group_sids; i++) {
+ gid_to_sid(&group_sids[i], gids[i]);
+ }
+
+ /* In getgroups_unix_user we always set the primary gid */
+ SMB_ASSERT(num_group_sids > 0);
+
+ *gid = gids[0];
+
+ /* Ensure we're returning the found_username on the right context. */
+ *found_username = talloc_strdup(mem_ctx, pass->pw_name);
+ } else {
+
+ /* This user is from winbind, force the primary gid to the
+ * user's "domain users" group. Under certain circumstances
+ * (user comes from NT4), this might be a loss of
+ * information. But we can not rely on winbind getting the
+ * correct info. AD might prohibit winbind looking up that
+ * information. */
+
+ uint32 dummy;
+
+ /* We must always assign the *uid. */
+ if (!sid_to_uid(&user_sid, uid)) {
+ DEBUG(1, ("winbindd case, sid_to_uid for %s (%s) failed\n",
+ username, sid_string_dbg(&user_sid)));
+ result = NT_STATUS_NO_SUCH_USER;
+ goto done;
+ }
+
+ num_group_sids = 1;
+ group_sids = TALLOC_ARRAY(tmp_ctx, struct dom_sid, num_group_sids);
+ if (group_sids == NULL) {
+ DEBUG(1, ("TALLOC_ARRAY failed\n"));
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ sid_copy(&group_sids[0], &user_sid);
+ sid_split_rid(&group_sids[0], &dummy);
+ sid_append_rid(&group_sids[0], DOMAIN_RID_USERS);
+
+ if (!sid_to_gid(&group_sids[0], gid)) {
+ DEBUG(1, ("sid_to_gid(%s) failed\n",
+ sid_string_dbg(&group_sids[0])));
+ goto done;
+ }
+
+ gids = gid;
+
+ /* Ensure we're returning the found_username on the right context. */
+ *found_username = talloc_strdup(mem_ctx, username);
+ }
+
+ /* Add the "Unix Group" SID for each gid to catch mapped groups
+ and their Unix equivalent. This is to solve the backwards
+ compatibility problem of 'valid users = +ntadmin' where
+ ntadmin has been paired with "Domain Admins" in the group
+ mapping table. Otherwise smb.conf would need to be changed
+ to 'valid user = "Domain Admins"'. --jerry */
+
+ num_gids = num_group_sids;
+ for ( i=0; i<num_gids; i++ ) {
+ gid_t high, low;
+
+ /* don't pickup anything managed by Winbind */
+
+ if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
+ continue;
+
+ if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
+ DEBUG(1,("create_token_from_username: Failed to create SID "
+ "for gid %u!\n", (unsigned int)gids[i]));
+ continue;
+ }
+ result = add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
+ &group_sids, &num_group_sids);
+ if (!NT_STATUS_IS_OK(result)) {
+ goto done;
+ }
+ }
+
+ /* Ensure we're creating the nt_token on the right context. */
+ *token = create_local_nt_token(mem_ctx, &user_sid,
+ is_guest, num_group_sids, group_sids);
+
+ if ((*token == NULL) || (*found_username == NULL)) {
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ result = NT_STATUS_OK;
+ done:
+ TALLOC_FREE(tmp_ctx);
+ return result;
+}
+
+/***************************************************************************
+ Build upon create_token_from_username:
+
+ Expensive helper function to figure out whether a user given its name is
+ member of a particular group.
+***************************************************************************/
+
+bool user_in_group_sid(const char *username, const struct dom_sid *group_sid)
+{
+ NTSTATUS status;
+ uid_t uid;
+ gid_t gid;
+ char *found_username;
+ struct nt_user_token *token;
+ bool result;
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+
+ status = create_token_from_username(mem_ctx, username, False,
+ &uid, &gid, &found_username,
+ &token);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("could not create token for %s\n", username));
+ TALLOC_FREE(mem_ctx);
+ return False;
+ }
+
+ result = nt_token_check_sid(group_sid, token);
+
+ TALLOC_FREE(mem_ctx);
+ return result;
+}
+
+bool user_in_group(const char *username, const char *groupname)
+{
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+ struct dom_sid group_sid;
+ bool ret;
+
+ ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
+ NULL, NULL, &group_sid, NULL);
+ TALLOC_FREE(mem_ctx);
+
+ if (!ret) {
+ DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
+ return False;
+ }
+
+ return user_in_group_sid(username, &group_sid);
+}
+
/* END */
git.samba.org / samba.git / blobdiff