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-rw-r--r--source3/lib/util_seaccess.c114
1 files changed, 32 insertions, 82 deletions
diff --git a/source3/lib/util_seaccess.c b/source3/lib/util_seaccess.c
index 52696d2d30..28e8a43c4e 100644
--- a/source3/lib/util_seaccess.c
+++ b/source3/lib/util_seaccess.c
@@ -3,6 +3,7 @@
Version 2.0
Copyright (C) Luke Kenneth Casson Leighton 1996-2000.
Copyright (C) Tim Potter 2000.
+ Copyright (C) Jeremy Allison 2000.
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
@@ -25,6 +26,22 @@
extern int DEBUGLEVEL;
+/*
+ * Guest token used when there is no NT_USER_TOKEN available.
+ */
+
+static DOM_SID builtin_guest = {
+ 1, /* sid_rev_num */
+ 2, /* num_auths */
+ { 0, 0, 0, 0, 0, 5}, /* id_auth[6] */
+ { 32, 546, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* sub_auth[15] */
+};
+
+static NT_USER_TOKEN guest_token = {
+ 1,
+ &builtin_guest
+};
+
/* Process an access allowed ACE */
static BOOL ace_grant(uint32 mask, uint32 *acc_desired, uint32 *acc_granted)
@@ -207,14 +224,11 @@ static BOOL check_ace(SEC_ACE *ace, BOOL is_owner, DOM_SID *sid,
BOOL se_access_check(SEC_DESC *sd, struct current_user *user,
uint32 acc_desired, uint32 *acc_granted, uint32 *status)
{
- DOM_SID user_sid, group_sid;
- DOM_SID owner_sid;
- DOM_SID **group_sids = NULL;
int i, j;
- uint ngroup_sids = 0;
SEC_ACL *acl;
uint8 check_ace_type;
fstring sid_str;
+ NT_USER_TOKEN *token = user->nt_user_token ? user->nt_user_token : &guest_token;
if (!status || !acc_granted)
return False;
@@ -250,70 +264,21 @@ BOOL se_access_check(SEC_DESC *sd, struct current_user *user,
goto done;
}
- /* Create user sid */
+ /* The user sid is the first in the token */
- if (!uid_to_sid(&user_sid, user->uid)) {
- DEBUG(3, ("could not lookup sid for uid %d\n", user->uid));
- goto done;
- }
-
- DEBUG(3, ("se_access_check: user sid is %s\n", sid_to_string(sid_str, &user_sid) ));
+ DEBUG(3, ("se_access_check: user sid is %s\n", sid_to_string(sid_str, &token->user_sids[0]) ));
/* If we're the owner, then we can do anything */
- if (sid_equal(&user_sid, sd->owner_sid)) {
+ if (sid_equal(&token->user_sids[0], sd->owner_sid)) {
*status = NT_STATUS_NOPROBLEMO;
*acc_granted = acc_desired;
acc_desired = 0;
DEBUG(3, ("is owner, access allowed\n"));
-
- goto done;
- }
-
- /* Create group sid */
-
- if (!gid_to_sid(&group_sid, user->gid)) {
- DEBUG(3, ("could not lookup sid for gid %d\n", user->gid));
goto done;
}
- sid_to_string(sid_str, &group_sid);
- DEBUG(3, ("group sid is %s\n", sid_str));
-
- /* Create array of group sids */
-
- add_sid_to_array(&ngroup_sids, &group_sids, &group_sid);
-
- for (i = 0; i < user->ngroups; i++) {
- if (user->groups[i] != user->gid) {
- if (gid_to_sid(&group_sid, user->groups[i])) {
-
- /* If we're a group member then we can also
- do anything */
-
- if (sid_equal(&group_sid, sd->grp_sid)) {
- *status = NT_STATUS_NOPROBLEMO;
- *acc_granted = acc_desired;
- acc_desired = 0;
- DEBUG(3, ("is group member "
- "access allowed\n"));
-
- goto done;
- }
-
- add_sid_to_array(&ngroup_sids, &group_sids,
- &group_sid);
- } else {
- DEBUG(3, ("could not lookup sid for gid %d\n",
- user->gid));
- }
-
- sid_to_string(sid_str, &group_sid);
- DEBUG(3, ("supplementary group %s\n", sid_str));
- }
- }
-
- /* ACL must have something in it */
+ /* ACL must have something in it */
acl = sd->dacl;
@@ -340,34 +305,21 @@ BOOL se_access_check(SEC_DESC *sd, struct current_user *user,
check_ace_type = SEC_ACE_TYPE_ACCESS_DENIED;
- check_aces:
-
- for (i = 0; i < acl->num_aces; i++) {
- SEC_ACE *ace = &acl->ace[i];
- BOOL is_group_owner;
-
- /* Check user sid */
-
- if (ace->type == check_ace_type &&
- check_ace(ace, False, &user_sid, &acc_desired,
- acc_granted, status)) {
- goto done;
- }
+ check_aces:
- /* Check group sids */
+ for (i = 0; i < acl->num_aces; i++) {
+ SEC_ACE *ace = &acl->ace[i];
- for (j = 0; j < ngroup_sids; j++) {
+ /* Check sids */
- is_group_owner = sd->grp_sid ?
- sid_equal(group_sids[j], sd->grp_sid) : False;
+ for (j = 0; j < token->num_sids; j++) {
+ BOOL is_owner = sid_equal(&token->user_sids[j], sd->owner_sid);
- if (ace->type == check_ace_type &&
- check_ace(ace, is_group_owner, group_sids[j],
- &acc_desired, acc_granted, status)) {
+ if (ace->type == check_ace_type && check_ace(ace, is_owner, &token->user_sids[j], &acc_desired, acc_granted, status)) {
goto done;
- }
- }
- }
+ }
+ }
+ }
/* Check access allowed ACEs */
@@ -378,8 +330,6 @@ BOOL se_access_check(SEC_DESC *sd, struct current_user *user,
done:
- free_sid_array(ngroup_sids, group_sids);
-
/* If any access desired bits are still on, return access denied
and turn off any bits already granted. */