#include "includes.h"
+extern struct current_user current_user;
+extern struct generic_mapping file_generic_mapping;
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_ACLS
+
/****************************************************************************
Data structures representing the internal ACE format.
****************************************************************************/
* +------+------+-------------+---------------------+-------------+--------------------+
*/
-#define SAMBA_POSIX_INHERITANCE_EA_NAME "user.SAMBA_PAI"
-
#define PAI_VERSION_OFFSET 0
#define PAI_FLAG_OFFSET 1
#define PAI_NUM_ENTRIES_OFFSET 2
};
struct pai_val {
- BOOL protected;
+ BOOL pai_protected;
unsigned int num_entries;
struct pai_entry *entry_list;
unsigned int num_def_entries;
Create the on-disk format. Caller must free.
************************************************************************/
-static char *create_pai_buf(canon_ace *file_ace_list, canon_ace *dir_ace_list, BOOL protected, size_t *store_size)
+static char *create_pai_buf(canon_ace *file_ace_list, canon_ace *dir_ace_list, BOOL pai_protected, size_t *store_size)
{
char *pai_buf = NULL;
canon_ace *ace_list = NULL;
*store_size = PAI_ENTRIES_BASE + ((num_entries + num_def_entries)*PAI_ENTRY_LENGTH);
- pai_buf = malloc(*store_size);
+ pai_buf = SMB_MALLOC(*store_size);
if (!pai_buf) {
return NULL;
}
/* Set up the header. */
memset(pai_buf, '\0', PAI_ENTRIES_BASE);
SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_VERSION);
- SCVAL(pai_buf,PAI_FLAG_OFFSET,(protected ? PAI_ACL_FLAG_PROTECTED : 0));
+ SCVAL(pai_buf,PAI_FLAG_OFFSET,(pai_protected ? PAI_ACL_FLAG_PROTECTED : 0));
SSVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET,num_entries);
SSVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
entry_offset = pai_buf + PAI_ENTRIES_BASE;
- for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
+ for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
if (ace_list->inherited) {
uint8 type_val = (unsigned char)ace_list->owner_type;
uint32 entry_val = get_entry_val(ace_list);
}
}
- for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
+ for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
if (ace_list->inherited) {
uint8 type_val = (unsigned char)ace_list->owner_type;
uint32 entry_val = get_entry_val(ace_list);
************************************************************************/
static void store_inheritance_attributes(files_struct *fsp, canon_ace *file_ace_list,
- canon_ace *dir_ace_list, BOOL protected)
+ canon_ace *dir_ace_list, BOOL pai_protected)
{
int ret;
size_t store_size;
* none of the entries in it are marked as inherited.
*/
- if (!protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
+ if (!pai_protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
/* Instead just remove the attribute if it exists. */
- if (fsp->fd != -1)
- SMB_VFS_FREMOVEXATTR(fsp, fsp->fd, SAMBA_POSIX_INHERITANCE_EA_NAME);
+ if (fsp->fh->fd != -1)
+ SMB_VFS_FREMOVEXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME);
else
SMB_VFS_REMOVEXATTR(fsp->conn, fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME);
return;
}
- pai_buf = create_pai_buf(file_ace_list, dir_ace_list, protected, &store_size);
+ pai_buf = create_pai_buf(file_ace_list, dir_ace_list, pai_protected, &store_size);
- if (fsp->fd != -1)
- ret = SMB_VFS_FSETXATTR(fsp, fsp->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
+ if (fsp->fh->fd != -1)
+ ret = SMB_VFS_FSETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
pai_buf, store_size, 0);
else
ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
SAFE_FREE(pai_buf);
- DEBUG(10,("store_inheritance_attribute:%s for file %s\n", protected ? " (protected)" : "", fsp->fsp_name));
- if (ret == -1 && errno != ENOSYS)
+ DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected ? " (protected)" : "", fsp->fsp_name));
+ if (ret == -1 && !no_acl_syscall_error(errno))
DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
}
{
if (!pal)
return False;
- return pal->protected;
+ return pal->pai_protected;
}
/************************************************************************
if (!check_pai_ok(buf, size))
return NULL;
- paiv = malloc(sizeof(struct pai_val));
+ paiv = SMB_MALLOC_P(struct pai_val);
if (!paiv)
return NULL;
memset(paiv, '\0', sizeof(struct pai_val));
- paiv->protected = (CVAL(buf,PAI_FLAG_OFFSET) == PAI_ACL_FLAG_PROTECTED);
+ paiv->pai_protected = (CVAL(buf,PAI_FLAG_OFFSET) == PAI_ACL_FLAG_PROTECTED);
paiv->num_entries = SVAL(buf,PAI_NUM_ENTRIES_OFFSET);
paiv->num_def_entries = SVAL(buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
entry_offset = buf + PAI_ENTRIES_BASE;
DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
- paiv->protected ? " (protected)" : "", paiv->num_entries, paiv->num_def_entries ));
+ paiv->pai_protected ? " (pai_protected)" : "", paiv->num_entries, paiv->num_def_entries ));
for (i = 0; i < paiv->num_entries; i++) {
struct pai_entry *paie;
- paie = malloc(sizeof(struct pai_entry));
+ paie = SMB_MALLOC_P(struct pai_entry);
if (!paie) {
free_inherited_info(paiv);
return NULL;
for (i = 0; i < paiv->num_def_entries; i++) {
struct pai_entry *paie;
- paie = malloc(sizeof(struct pai_entry));
+ paie = SMB_MALLOC_P(struct pai_entry);
if (!paie) {
free_inherited_info(paiv);
return NULL;
if (!lp_map_acl_inherit(SNUM(fsp->conn)))
return NULL;
- if ((pai_buf = malloc(pai_buf_size)) == NULL)
+ if ((pai_buf = SMB_MALLOC(pai_buf_size)) == NULL)
return NULL;
do {
- if (fsp->fd != -1)
- ret = SMB_VFS_FGETXATTR(fsp, fsp->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
+ if (fsp->fh->fd != -1)
+ ret = SMB_VFS_FGETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
pai_buf, pai_buf_size);
else
ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
/* Buffer too small - enlarge it. */
pai_buf_size *= 2;
SAFE_FREE(pai_buf);
- if ((pai_buf = malloc(pai_buf_size)) == NULL)
+ if (pai_buf_size > 1024*1024) {
+ return NULL; /* Limit malloc to 1mb. */
+ }
+ if ((pai_buf = SMB_MALLOC(pai_buf_size)) == NULL)
return NULL;
}
} while (ret == -1);
paiv = create_pai_val(pai_buf, ret);
- if (paiv && paiv->protected)
+ if (paiv && paiv->pai_protected)
DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp->fsp_name));
SAFE_FREE(pai_buf);
static void free_canon_ace_list( canon_ace *list_head )
{
- while (list_head) {
- canon_ace *old_head = list_head;
- DLIST_REMOVE(list_head, list_head);
- SAFE_FREE(old_head);
+ canon_ace *list, *next;
+
+ for (list = list_head; list; list = next) {
+ next = list->next;
+ DLIST_REMOVE(list_head, list);
+ SAFE_FREE(list);
}
}
static canon_ace *dup_canon_ace( canon_ace *src_ace)
{
- canon_ace *dst_ace = (canon_ace *)malloc(sizeof(canon_ace));
+ canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
if (dst_ace == NULL)
return NULL;
static BOOL nt4_compatible_acls(void)
{
- const char *compat = lp_acl_compatibility();
+ int compat = lp_acl_compatibility();
- if (*compat == '\0') {
+ if (compat == ACL_COMPAT_AUTO) {
enum remote_arch_types ra_type = get_remote_arch();
/* Automatically adapt to client */
return (ra_type <= RA_WINNT);
} else
- return (strequal(compat, "winnt"));
+ return (compat == ACL_COMPAT_WINNT);
}
not get. Deny entries are implicit on get with ace->perms = 0.
****************************************************************************/
-static SEC_ACCESS map_canon_ace_perms(int *pacl_type, DOM_SID *powner_sid, canon_ace *ace)
+static SEC_ACCESS map_canon_ace_perms(int snum, int *pacl_type, DOM_SID *powner_sid, canon_ace *ace, BOOL directory_ace)
{
SEC_ACCESS sa;
uint32 nt_mask = 0;
*pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
- if ((ace->perms & ALL_ACE_PERMS) == ALL_ACE_PERMS) {
+ if (lp_acl_map_full_control(snum) && ((ace->perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
+ if (directory_ace) {
+ nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
+ } else {
nt_mask = UNIX_ACCESS_RWX;
+ }
} else if ((ace->perms & ALL_ACE_PERMS) == (mode_t)0) {
/*
* Windows NT refuses to display ACEs with no permissions in them (but
else
nt_mask = 0;
} else {
- nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
- nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
- nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
+ if (directory_ace) {
+ nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
+ nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
+ nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
+ } else {
+ nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
+ nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
+ nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
+ }
}
DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
Unpack a SEC_DESC into a UNIX owner and group.
****************************************************************************/
-static BOOL unpack_nt_owners(SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
+static BOOL unpack_nt_owners(int snum, SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
{
DOM_SID owner_sid;
DOM_SID grp_sid;
if (security_info_sent & OWNER_SECURITY_INFORMATION) {
sid_copy(&owner_sid, psd->owner_sid);
- if (!NT_STATUS_IS_OK(sid_to_uid(&owner_sid, puser))) {
-#if ACL_FORCE_UNMAPPABLE
- /* this allows take ownership to work reasonably */
- extern struct current_user current_user;
- *puser = current_user.uid;
-#else
- DEBUG(3,("unpack_nt_owners: unable to validate owner sid for %s\n",
- sid_string_static(&owner_sid)));
- return False;
-#endif
+ if (!sid_to_uid(&owner_sid, puser)) {
+ if (lp_force_unknown_acl_user(snum)) {
+ /* this allows take ownership to work
+ * reasonably */
+ *puser = current_user.ut.uid;
+ } else {
+ DEBUG(3,("unpack_nt_owners: unable to validate"
+ " owner sid for %s\n",
+ sid_string_static(&owner_sid)));
+ return False;
+ }
}
}
if (security_info_sent & GROUP_SECURITY_INFORMATION) {
sid_copy(&grp_sid, psd->grp_sid);
- if (!NT_STATUS_IS_OK(sid_to_gid( &grp_sid, pgrp))) {
-#if ACL_FORCE_UNMAPPABLE
- /* this allows take group ownership to work reasonably */
- extern struct current_user current_user;
- *pgrp = current_user.gid;
-#else
- DEBUG(3,("unpack_nt_owners: unable to validate group sid.\n"));
- return False;
-#endif
+ if (!sid_to_gid( &grp_sid, pgrp)) {
+ if (lp_force_unknown_acl_user(snum)) {
+ /* this allows take group ownership to work
+ * reasonably */
+ *pgrp = current_user.ut.gid;
+ } else {
+ DEBUG(3,("unpack_nt_owners: unable to validate"
+ " group sid.\n"));
+ return False;
+ }
}
}
static BOOL uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
{
- extern DOM_SID global_sid_World;
fstring u_name;
- fstring g_name;
- extern struct current_user current_user;
/* "Everyone" always matches every uid. */
/* Assume that the current user is in the current group (force group) */
- if (uid_ace->unix_ug.uid == current_user.uid && group_ace->unix_ug.gid == current_user.gid)
+ if (uid_ace->unix_ug.uid == current_user.ut.uid && group_ace->unix_ug.gid == current_user.ut.gid)
return True;
fstrcpy(u_name, uidtoname(uid_ace->unix_ug.uid));
- fstrcpy(g_name, gidtoname(group_ace->unix_ug.gid));
-
- /*
- * Due to the winbind interfaces we need to do this via names,
- * not uids/gids.
- */
-
- return user_in_group_list(u_name, g_name, NULL, 0);
+ return user_in_group_sid(u_name, &group_ace->trustee);
}
/****************************************************************************
static BOOL ensure_canon_entry_valid(canon_ace **pp_ace,
files_struct *fsp,
- DOM_SID *pfile_owner_sid,
- DOM_SID *pfile_grp_sid,
+ const DOM_SID *pfile_owner_sid,
+ const DOM_SID *pfile_grp_sid,
SMB_STRUCT_STAT *pst,
BOOL setting_acl)
{
- extern DOM_SID global_sid_World;
canon_ace *pace;
BOOL got_user = False;
BOOL got_grp = False;
BOOL got_other = False;
canon_ace *pace_other = NULL;
- canon_ace *pace_group = NULL;
for (pace = *pp_ace; pace; pace = pace->next) {
if (pace->type == SMB_ACL_USER_OBJ) {
if (setting_acl)
apply_default_perms(fsp, pace, S_IRGRP);
got_grp = True;
- pace_group = pace;
} else if (pace->type == SMB_ACL_OTHER) {
}
if (!got_user) {
- if ((pace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL) {
+ if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
return False;
}
pace->attr = ALLOW_ACE;
if (setting_acl) {
+ /* See if the owning user is in any of the other groups in
+ the ACE. If so, OR in the permissions from that group. */
+
+ BOOL group_matched = False;
+ canon_ace *pace_iter;
+
+ for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
+ if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
+ if (uid_entry_in_group(pace, pace_iter)) {
+ pace->perms |= pace_iter->perms;
+ group_matched = True;
+ }
+ }
+ }
+
/* If we only got an "everyone" perm, just use that. */
- if (!got_grp && got_other)
- pace->perms = pace_other->perms;
- else if (got_grp && uid_entry_in_group(pace, pace_group))
- pace->perms = pace_group->perms;
- else
- pace->perms = 0;
+ if (!group_matched) {
+ if (got_other)
+ pace->perms = pace_other->perms;
+ else
+ pace->perms = 0;
+ }
apply_default_perms(fsp, pace, S_IRUSR);
} else {
}
if (!got_grp) {
- if ((pace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL) {
+ if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
return False;
}
}
if (!got_other) {
- if ((pace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL) {
+ if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
return False;
}
canon_ace **ppfile_ace, canon_ace **ppdir_ace,
SEC_ACL *dacl)
{
- extern DOM_SID global_sid_Creator_Owner;
- extern DOM_SID global_sid_Creator_Group;
- extern DOM_SID global_sid_World;
- extern struct generic_mapping file_generic_mapping;
BOOL all_aces_are_inherit_only = (fsp->is_directory ? True : False);
canon_ace *file_ace = NULL;
canon_ace *dir_ace = NULL;
* Create a cannon_ace entry representing this NT DACL ACE.
*/
- if ((current_ace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL) {
+ if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
free_canon_ace_list(file_ace);
free_canon_ace_list(dir_ace);
DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
if (nt4_compatible_acls())
psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
- } else if (NT_STATUS_IS_OK(sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid))) {
- current_ace->owner_type = GID_ACE;
- current_ace->type = SMB_ACL_GROUP;
- } else if (NT_STATUS_IS_OK(sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid))) {
+ } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
current_ace->owner_type = UID_ACE;
current_ace->type = SMB_ACL_USER;
+ } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
+ current_ace->owner_type = GID_ACE;
+ current_ace->type = SMB_ACL_GROUP;
} else {
fstring str;
Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
free_canon_ace_list(file_ace);
free_canon_ace_list(dir_ace);
- SAFE_FREE(current_ace);
return False;
}
* Only add to the file ACL if not inherit only.
*/
- if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
+ if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
DLIST_ADD_END(file_ace, current_ace, tmp_ace);
/*
Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
free_canon_ace_list(file_ace);
free_canon_ace_list(dir_ace);
- SAFE_FREE(current_ace);
return False;
}
* entries can be converted to *_OBJ. Usually we will already have these
* entries in the Default ACL, and the Access ACL will not have them.
*/
- check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
- check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
+ if (file_ace) {
+ check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
+ }
+ if (dir_ace) {
+ check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
+ }
}
*ppfile_ace = file_ace;
static void process_deny_list( canon_ace **pp_ace_list )
{
- extern DOM_SID global_sid_World;
canon_ace *ace_list = *pp_ace_list;
canon_ace *curr_ace = NULL;
canon_ace *curr_ace_next = NULL;
int snum = SNUM(fsp->conn);
mode_t and_bits = (mode_t)0;
mode_t or_bits = (mode_t)0;
- mode_t mode = interitable_mode ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name) : S_IRUSR;
+ mode_t mode = interitable_mode ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name, False) : S_IRUSR;
if (fsp->is_directory)
mode |= (S_IWUSR|S_IXUSR);
then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
Entry 0: owner : deny all except read and write.
- Entry 1: group : deny all except read.
- Entry 2: owner : allow read and write.
+ Entry 1: owner : allow read and write.
+ Entry 2: group : deny all except read.
Entry 3: group : allow read.
Entry 4: Everyone : allow read.
****************************************************************************/
static canon_ace *canonicalise_acl( files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
- DOM_SID *powner, DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
+ const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
{
- extern DOM_SID global_sid_World;
connection_struct *conn = fsp->conn;
mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
canon_ace *list_head = NULL;
* entries out of the blue when setting ACLs, so a get/set
* cycle will drop them.
*/
- if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid)
+ if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
+ SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
continue;
+ }
uid_to_sid( &sid, *puid);
unix_ug.uid = *puid;
owner_type = UID_ACE;
* Add this entry to the list.
*/
- if ((ace = (canon_ace *)malloc(sizeof(canon_ace))) == NULL)
+ if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
goto fail;
ZERO_STRUCTP(ace);
return NULL;
}
+/****************************************************************************
+ Check if the current user group list contains a given group.
+****************************************************************************/
+
+static BOOL current_user_in_group(gid_t gid)
+{
+ int i;
+
+ for (i = 0; i < current_user.ut.ngroups; i++) {
+ if (current_user.ut.groups[i] == gid) {
+ return True;
+ }
+ }
+
+ return False;
+}
+
+/****************************************************************************
+ Should we override a deny ? Check deprecated 'acl group control'
+ and 'dos filemode'
+****************************************************************************/
+
+static BOOL acl_group_override(connection_struct *conn, gid_t prim_gid)
+{
+ if ( (errno == EACCES || errno == EPERM)
+ && (lp_acl_group_control(SNUM(conn) || lp_dos_filemode(SNUM(conn))))
+ && current_user_in_group(prim_gid) )
+ {
+ return True;
+ }
+
+ return False;
+}
+
/****************************************************************************
Attempt to apply an ACL to a file or directory.
****************************************************************************/
-static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, BOOL *pacl_set_support)
+static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, gid_t prim_gid, BOOL *pacl_set_support)
{
connection_struct *conn = fsp->conn;
BOOL ret = False;
if (the_acl == NULL) {
- if (errno != ENOSYS) {
+ if (!no_acl_syscall_error(errno)) {
/*
* Only print this error message if we have some kind of ACL
* support that's not working. Otherwise we would always get this.
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
i, strerror(errno) ));
- goto done;
+ goto fail;
}
if (p_ace->type == SMB_ACL_MASK) {
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
i, strerror(errno) ));
- goto done;
+ goto fail;
}
/*
if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
i, strerror(errno) ));
- goto done;
+ goto fail;
}
}
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
i, strerror(errno) ));
- goto done;
+ goto fail;
}
if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
(unsigned int)p_ace->perms, i, strerror(errno) ));
- goto done;
+ goto fail;
}
/*
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
i, strerror(errno) ));
- goto done;
+ goto fail;
}
if( DEBUGLVL( 10 ))
if (needs_mask && !got_mask_entry) {
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
- goto done;
+ goto fail;
}
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
- goto done;
+ goto fail;
}
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
- goto done;
+ goto fail;
}
if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
- goto done;
+ goto fail;
}
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
- goto done;
+ goto fail;
}
}
DEBUG(0,("set_canon_ace_list: ACL type (%s) is invalid for set (%s).\n",
the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
strerror(errno) ));
- goto done;
+ goto fail;
}
/*
* Finally apply it to the file or directory.
*/
- if(default_ace || fsp->is_directory || fsp->fd == -1) {
+ if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
/*
* Some systems allow all the above calls and only fail with no ACL support
* when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
*/
- if (errno == ENOSYS)
+ if (no_acl_syscall_error(errno)) {
*pacl_set_support = False;
+ }
-#ifdef ENOTSUP
- if (errno == ENOTSUP)
- *pacl_set_support = False;
-#endif
+ if (acl_group_override(conn, prim_gid)) {
+ int sret;
- DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
- the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
- fsp->fsp_name, strerror(errno) ));
- goto done;
+ DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
+ fsp->fsp_name ));
+
+ become_root();
+ sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
+ unbecome_root();
+ if (sret == 0) {
+ ret = True;
+ }
+ }
+
+ if (ret == False) {
+ DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
+ the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
+ fsp->fsp_name, strerror(errno) ));
+ goto fail;
+ }
}
} else {
- if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fd, the_acl) == -1) {
+ if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
/*
* Some systems allow all the above calls and only fail with no ACL support
* when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
*/
- if (errno == ENOSYS)
+ if (no_acl_syscall_error(errno)) {
*pacl_set_support = False;
+ }
-#ifdef ENOTSUP
- if (errno == ENOTSUP)
- *pacl_set_support = False;
-#endif
+ if (acl_group_override(conn, prim_gid)) {
+ int sret;
- DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
- fsp->fsp_name, strerror(errno) ));
- goto done;
+ DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
+ fsp->fsp_name ));
+
+ become_root();
+ sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
+ unbecome_root();
+ if (sret == 0) {
+ ret = True;
+ }
+ }
+
+ if (ret == False) {
+ DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
+ fsp->fsp_name, strerror(errno) ));
+ goto fail;
+ }
}
}
ret = True;
- done:
+ fail:
- if (the_acl != NULL)
- SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
+ if (the_acl != NULL) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
+ }
return ret;
}
size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
{
- extern DOM_SID global_sid_Builtin_Administrators;
- extern DOM_SID global_sid_Builtin_Users;
- extern DOM_SID global_sid_Creator_Owner;
- extern DOM_SID global_sid_Creator_Group;
connection_struct *conn = fsp->conn;
SMB_STRUCT_STAT sbuf;
SEC_ACE *nt_ace_list = NULL;
size_t sd_size = 0;
SEC_ACL *psa = NULL;
size_t num_acls = 0;
- size_t num_dir_acls = 0;
+ size_t num_def_acls = 0;
size_t num_aces = 0;
SMB_ACL_T posix_acl = NULL;
- SMB_ACL_T dir_acl = NULL;
+ SMB_ACL_T def_acl = NULL;
canon_ace *file_ace = NULL;
canon_ace *dir_ace = NULL;
size_t num_profile_acls = 0;
DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
- if(fsp->is_directory || fsp->fd == -1) {
+ if(fsp->is_directory || fsp->fh->fd == -1) {
/* Get the stat struct for the owner info. */
if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
*/
if(fsp->is_directory) {
- dir_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
- dir_acl = free_empty_sys_acl(conn, dir_acl);
+ def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
+ def_acl = free_empty_sys_acl(conn, def_acl);
}
} else {
/* Get the stat struct for the owner info. */
- if(SMB_VFS_FSTAT(fsp,fsp->fd,&sbuf) != 0) {
+ if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
return 0;
}
/*
* Get the ACL from the fd.
*/
- posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fd);
+ posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
}
DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
posix_acl ? "present" : "absent",
- dir_acl ? "present" : "absent" ));
+ def_acl ? "present" : "absent" ));
pal = load_inherited_info(fsp);
* Get the owner, group and world SIDs.
*/
- if (lp_profile_acls(SNUM(fsp->conn))) {
+ if (lp_profile_acls(SNUM(conn))) {
/* For WXP SP1 the owner must be administrators. */
sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
sid_copy(&group_sid, &global_sid_Builtin_Users);
if (count_canon_ace_list(file_ace) == 0) {
DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
- return 0;
+ goto done;
}
- if (fsp->is_directory && dir_acl) {
- dir_ace = canonicalise_acl(fsp, dir_acl, &sbuf,
+ if (fsp->is_directory && def_acl) {
+ dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
&global_sid_Creator_Owner,
&global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
}
}
num_acls = count_canon_ace_list(file_ace);
- num_dir_acls = count_canon_ace_list(dir_ace);
+ num_def_acls = count_canon_ace_list(dir_ace);
/* Allocate the ace list. */
- if ((nt_ace_list = (SEC_ACE *)malloc((num_acls + num_profile_acls + num_dir_acls)* sizeof(SEC_ACE))) == NULL) {
+ if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
goto done;
}
- memset(nt_ace_list, '\0', (num_acls + num_dir_acls) * sizeof(SEC_ACE) );
+ memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
/*
* Create the NT ACE list from the canonical ace lists.
for (i = 0; i < num_acls; i++, ace = ace->next) {
SEC_ACCESS acc;
- acc = map_canon_ace_perms(&nt_acl_type, &owner_sid, ace );
+ acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc, ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0);
}
/* The User must have access to a profile share - even if we can't map the SID. */
- if (lp_profile_acls(SNUM(fsp->conn))) {
+ if (lp_profile_acls(SNUM(conn))) {
SEC_ACCESS acc;
init_sec_access(&acc,FILE_GENERIC_ALL);
ace = dir_ace;
- for (i = 0; i < num_dir_acls; i++, ace = ace->next) {
+ for (i = 0; i < num_def_acls; i++, ace = ace->next) {
SEC_ACCESS acc;
- acc = map_canon_ace_perms(&nt_acl_type, &owner_sid, ace );
+ acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc,
SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
SEC_ACE_FLAG_INHERIT_ONLY|
}
/* The User must have access to a profile share - even if we can't map the SID. */
- if (lp_profile_acls(SNUM(fsp->conn))) {
+ if (lp_profile_acls(SNUM(conn))) {
SEC_ACCESS acc;
init_sec_access(&acc,FILE_GENERIC_ALL);
}
if (num_aces) {
- if((psa = make_sec_acl( main_loop_talloc_get(), ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
+ if((psa = make_sec_acl( main_loop_talloc_get(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
goto done;
}
if(!psd) {
DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
sd_size = 0;
- } else {
- /*
- * Windows 2000: The DACL_PROTECTED flag in the security
- * descriptor marks the ACL as non-inheriting, i.e., no
- * ACEs from higher level directories propagate to this
- * ACL. In the POSIX ACL model permissions are only
- * inherited at file create time, so ACLs never contain
- * any ACEs that are inherited dynamically. The DACL_PROTECTED
- * flag doesn't seem to bother Windows NT.
- */
- if (get_protected_flag(pal))
- psd->type |= SE_DESC_DACL_PROTECTED;
+ goto done;
+ }
+
+ /*
+ * Windows 2000: The DACL_PROTECTED flag in the security
+ * descriptor marks the ACL as non-inheriting, i.e., no
+ * ACEs from higher level directories propagate to this
+ * ACL. In the POSIX ACL model permissions are only
+ * inherited at file create time, so ACLs never contain
+ * any ACEs that are inherited dynamically. The DACL_PROTECTED
+ * flag doesn't seem to bother Windows NT.
+ * Always set this if map acl inherit is turned off.
+ */
+ if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
+ psd->type |= SE_DESC_DACL_PROTECTED;
}
- if (psd->dacl)
+ if (psd->dacl) {
dacl_sort_into_canonical_order(psd->dacl->ace, (unsigned int)psd->dacl->num_aces);
+ }
*ppdesc = psd;
done:
- if (posix_acl)
+ if (posix_acl) {
SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
- if (dir_acl)
- SMB_VFS_SYS_ACL_FREE_ACL(conn, dir_acl);
+ }
+ if (def_acl) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
+ }
free_canon_ace_list(file_ace);
free_canon_ace_list(dir_ace);
free_inherited_info(pal);
Try to chown a file. We will be able to chown it under the following conditions.
1) If we have root privileges, then it will just work.
- 2) If we have write permission to the file and dos_filemodes is set
+ 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
+ 3) If we have SeRestorePrivilege we can change the user to any other user.
+ 4) If we have write permission to the file and dos_filemodes is set
then allow chown to the currently authenticated user.
****************************************************************************/
static int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
{
int ret;
- extern struct current_user current_user;
files_struct *fsp;
SMB_STRUCT_STAT st;
+ if(!CAN_WRITE(conn)) {
+ return -1;
+ }
+
+ /* Case (1). */
/* try the direct way first */
ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
if (ret == 0)
return 0;
- if(!CAN_WRITE(conn) || !lp_dos_filemode(SNUM(conn)))
+ /* Case (2) / (3) */
+ if (lp_enable_privileges()) {
+
+ BOOL has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
+ &se_take_ownership);
+ BOOL has_restore_priv = user_has_privileges(current_user.nt_user_token,
+ &se_restore);
+
+ /* Case (2) */
+ if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
+ /* Case (3) */
+ ( has_restore_priv ) ) {
+
+ become_root();
+ /* Keep the current file gid the same - take ownership doesn't imply group change. */
+ ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
+ unbecome_root();
+ return ret;
+ }
+ }
+
+ /* Case (4). */
+ if (!lp_dos_filemode(SNUM(conn))) {
return -1;
+ }
- if (SMB_VFS_STAT(conn,fname,&st))
+ if (SMB_VFS_STAT(conn,fname,&st)) {
return -1;
+ }
- fsp = open_file_fchmod(conn,fname,&st);
- if (!fsp)
+ if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
return -1;
+ }
/* only allow chown to the current user. This is more secure,
and also copes with the case where the SID in a take ownership ACL is
a local SID on the users workstation
*/
- uid = current_user.uid;
+ uid = current_user.ut.uid;
become_root();
/* Keep the current file gid the same. */
- ret = SMB_VFS_FCHOWN(fsp, fsp->fd, uid, (gid_t)-1);
+ ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
unbecome_root();
close_file_fchmod(fsp);
uid_t orig_uid;
gid_t orig_gid;
BOOL need_chown = False;
- extern struct current_user current_user;
DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
* Get the current state of the file.
*/
- if(fsp->is_directory || fsp->fd == -1) {
+ if(fsp->is_directory || fsp->fh->fd == -1) {
if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
return False;
} else {
- if(SMB_VFS_FSTAT(fsp,fsp->fd,&sbuf) != 0)
+ if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
return False;
}
* Unpack the user/group/world id's.
*/
- if (!unpack_nt_owners( &sbuf, &user, &grp, security_info_sent, psd))
+ if (!unpack_nt_owners( SNUM(conn), &sbuf, &user, &grp, security_info_sent, psd)) {
return False;
+ }
/*
* Do we need to chown ?
*/
- if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp)))
+ if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp))) {
need_chown = True;
+ }
/*
* Chown before setting ACL only if we don't change the user, or
* the file.
*/
- if (need_chown && (user == (uid_t)-1 || user == current_user.uid)) {
+ if (need_chown && (user == (uid_t)-1 || user == current_user.ut.uid)) {
DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
int ret;
- if(fsp->fd == -1)
+ if(fsp->fh->fd == -1)
ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
else
- ret = SMB_VFS_FSTAT(fsp,fsp->fd,&sbuf);
+ ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
if(ret != 0)
return False;
create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
- &file_ace_list, &dir_ace_list, security_info_sent, psd);
+ &file_ace_list, &dir_ace_list, security_info_sent, psd);
/* Ignore W2K traverse DACL set. */
if (file_ace_list || dir_ace_list) {
*/
if (acl_perms && file_ace_list) {
- ret = set_canon_ace_list(fsp, file_ace_list, False, &acl_set_support);
+ ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
if (acl_set_support && ret == False) {
DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
free_canon_ace_list(file_ace_list);
if (acl_perms && acl_set_support && fsp->is_directory) {
if (dir_ace_list) {
- if (!set_canon_ace_list(fsp, dir_ace_list, True, &acl_set_support)) {
+ if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
free_canon_ace_list(file_ace_list);
free_canon_ace_list(dir_ace_list);
*/
if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
- DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
- free_canon_ace_list(file_ace_list);
- free_canon_ace_list(dir_ace_list);
- return False;
+ int sret = -1;
+
+ if (acl_group_override(conn, sbuf.st_gid)) {
+ DEBUG(5,("set_nt_acl: acl group control on and "
+ "current user in file %s primary group. Override delete_def_acl\n",
+ fsp->fsp_name ));
+
+ become_root();
+ sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
+ unbecome_root();
+ }
+
+ if (sret == -1) {
+ DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
+ free_canon_ace_list(file_ace_list);
+ free_canon_ace_list(dir_ace_list);
+ return False;
+ }
}
}
}
- if (acl_set_support)
+ if (acl_set_support) {
store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
(psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
+ }
/*
* If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
fsp->fsp_name, (unsigned int)posix_perms ));
if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
- DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
+ int sret = -1;
+ if (acl_group_override(conn, sbuf.st_gid)) {
+ DEBUG(5,("set_nt_acl: acl group control on and "
+ "current user in file %s primary group. Override chmod\n",
+ fsp->fsp_name ));
+
+ become_root();
+ sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
+ unbecome_root();
+ }
+
+ if (sret == -1) {
+ DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
- free_canon_ace_list(file_ace_list);
- free_canon_ace_list(dir_ace_list);
- return False;
+ free_canon_ace_list(file_ace_list);
+ free_canon_ace_list(dir_ace_list);
+ return False;
+ }
}
}
}
the mask bits, not the real group bits, for a file with an ACL.
****************************************************************************/
-int get_acl_group_bits( connection_struct *conn, char *fname, mode_t *mode )
+int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
{
int entry_id = SMB_ACL_FIRST_ENTRY;
SMB_ACL_ENTRY_T entry;
SMB_ACL_T posix_acl;
+ int result = -1;
posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
if (posix_acl == (SMB_ACL_T)NULL)
entry_id = SMB_ACL_NEXT_ENTRY;
if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
- return -1;
+ break;
if (tagtype == SMB_ACL_GROUP_OBJ) {
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
- return -1;
+ break;
} else {
*mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
*mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
*mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
*mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
- return 0;;
+ result = 0;
+ break;
}
}
}
- return -1;
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
+ return result;
}
/****************************************************************************
BOOL directory_has_default_acl(connection_struct *conn, const char *fname)
{
- SMB_ACL_T dir_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
- BOOL has_acl = False;
- SMB_ACL_ENTRY_T entry;
+ SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
+ BOOL has_acl = False;
+ SMB_ACL_ENTRY_T entry;
- if (dir_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, dir_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1))
- has_acl = True;
+ if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
+ has_acl = True;
+ }
- if (dir_acl)
- SMB_VFS_SYS_ACL_FREE_ACL(conn, dir_acl);
+ if (def_acl) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
+ }
return has_acl;
}
+
+/****************************************************************************
+ Map from wire type to permset.
+****************************************************************************/
+
+static BOOL unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
+{
+ if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
+ return False;
+ }
+
+ if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
+ return False;
+ }
+
+ if (wire_perm & SMB_POSIX_ACL_READ) {
+ if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
+ return False;
+ }
+ }
+ if (wire_perm & SMB_POSIX_ACL_WRITE) {
+ if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
+ return False;
+ }
+ }
+ if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
+ if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
+ return False;
+ }
+ }
+ return True;
+}
+
+/****************************************************************************
+ Map from wire type to tagtype.
+****************************************************************************/
+
+static BOOL unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
+{
+ switch (wire_tt) {
+ case SMB_POSIX_ACL_USER_OBJ:
+ *p_tt = SMB_ACL_USER_OBJ;
+ break;
+ case SMB_POSIX_ACL_USER:
+ *p_tt = SMB_ACL_USER;
+ break;
+ case SMB_POSIX_ACL_GROUP_OBJ:
+ *p_tt = SMB_ACL_GROUP_OBJ;
+ break;
+ case SMB_POSIX_ACL_GROUP:
+ *p_tt = SMB_ACL_GROUP;
+ break;
+ case SMB_POSIX_ACL_MASK:
+ *p_tt = SMB_ACL_MASK;
+ break;
+ case SMB_POSIX_ACL_OTHER:
+ *p_tt = SMB_ACL_OTHER;
+ break;
+ default:
+ return False;
+ }
+ return True;
+}
+
+/****************************************************************************
+ Create a new POSIX acl from wire permissions.
+ FIXME ! How does the share mask/mode fit into this.... ?
+****************************************************************************/
+
+static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
+{
+ unsigned int i;
+ SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
+
+ if (the_acl == NULL) {
+ return NULL;
+ }
+
+ for (i = 0; i < num_acls; i++) {
+ SMB_ACL_ENTRY_T the_entry;
+ SMB_ACL_PERMSET_T the_permset;
+ SMB_ACL_TAG_T tag_type;
+
+ if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
+ DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
+ i, strerror(errno) ));
+ goto fail;
+ }
+
+ if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
+ DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
+ CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
+ goto fail;
+ }
+
+ if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
+ DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
+ i, strerror(errno) ));
+ goto fail;
+ }
+
+ /* Get the permset pointer from the new ACL entry. */
+ if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
+ DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
+ i, strerror(errno) ));
+ goto fail;
+ }
+
+ /* Map from wire to permissions. */
+ if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
+ DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
+ CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
+ goto fail;
+ }
+
+ /* Now apply to the new ACL entry. */
+ if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
+ DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
+ i, strerror(errno) ));
+ goto fail;
+ }
+
+ if (tag_type == SMB_ACL_USER) {
+ uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
+ uid_t uid = (uid_t)uidval;
+ if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
+ DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
+ (unsigned int)uid, i, strerror(errno) ));
+ goto fail;
+ }
+ }
+
+ if (tag_type == SMB_ACL_GROUP) {
+ uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
+ gid_t gid = (uid_t)gidval;
+ if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
+ DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
+ (unsigned int)gid, i, strerror(errno) ));
+ goto fail;
+ }
+ }
+ }
+
+ return the_acl;
+
+ fail:
+
+ if (the_acl != NULL) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
+ }
+ return NULL;
+}
+
+/****************************************************************************
+ Calls from UNIX extensions - Default POSIX ACL set.
+ If num_def_acls == 0 and not a directory just return. If it is a directory
+ and num_def_acls == 0 then remove the default acl. Else set the default acl
+ on the directory.
+****************************************************************************/
+
+BOOL set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
+ uint16 num_def_acls, const char *pdata)
+{
+ SMB_ACL_T def_acl = NULL;
+
+ if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
+ DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
+ errno = EISDIR;
+ return False;
+ }
+
+ if (!num_def_acls) {
+ /* Remove the default ACL. */
+ if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
+ DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
+ fname, strerror(errno) ));
+ return False;
+ }
+ return True;
+ }
+
+ if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
+ return False;
+ }
+
+ if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
+ DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
+ fname, strerror(errno) ));
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
+ return False;
+ }
+
+ DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
+ return True;
+}
+
+/****************************************************************************
+ Remove an ACL from a file. As we don't have acl_delete_entry() available
+ we must read the current acl and copy all entries except MASK, USER and GROUP
+ to a new acl, then set that. This (at least on Linux) causes any ACL to be
+ removed.
+ FIXME ! How does the share mask/mode fit into this.... ?
+****************************************************************************/
+
+static BOOL remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
+{
+ SMB_ACL_T file_acl = NULL;
+ int entry_id = SMB_ACL_FIRST_ENTRY;
+ SMB_ACL_ENTRY_T entry;
+ BOOL ret = False;
+ /* Create a new ACL with only 3 entries, u/g/w. */
+ SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
+ SMB_ACL_ENTRY_T user_ent = NULL;
+ SMB_ACL_ENTRY_T group_ent = NULL;
+ SMB_ACL_ENTRY_T other_ent = NULL;
+
+ if (new_file_acl == NULL) {
+ DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
+ return False;
+ }
+
+ /* Now create the u/g/w entries. */
+ if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
+ DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+ if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
+ DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+
+ if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
+ DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+ if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
+ DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+
+ if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
+ DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+ if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
+ DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+
+ /* Get the current file ACL. */
+ if (fsp && fsp->fh->fd != -1) {
+ file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
+ } else {
+ file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
+ }
+
+ if (file_acl == NULL) {
+ /* This is only returned if an error occurred. Even for a file with
+ no acl a u/g/w acl should be returned. */
+ DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+
+ while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
+ SMB_ACL_TAG_T tagtype;
+ SMB_ACL_PERMSET_T permset;
+
+ /* get_next... */
+ if (entry_id == SMB_ACL_FIRST_ENTRY)
+ entry_id = SMB_ACL_NEXT_ENTRY;
+
+ if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
+ DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+
+ if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
+ DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+
+ if (tagtype == SMB_ACL_USER_OBJ) {
+ if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
+ DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
+ fname, strerror(errno) ));
+ }
+ } else if (tagtype == SMB_ACL_GROUP_OBJ) {
+ if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
+ DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
+ fname, strerror(errno) ));
+ }
+ } else if (tagtype == SMB_ACL_OTHER) {
+ if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
+ DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
+ fname, strerror(errno) ));
+ }
+ }
+ }
+
+ /* Set the new empty file ACL. */
+ if (fsp && fsp->fh->fd != -1) {
+ if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, new_file_acl) == -1) {
+ DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+ } else {
+ if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
+ DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
+ fname, strerror(errno) ));
+ goto done;
+ }
+ }
+
+ ret = True;
+
+ done:
+
+ if (file_acl) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
+ }
+ if (new_file_acl) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
+ }
+ return ret;
+}
+
+/****************************************************************************
+ Calls from UNIX extensions - POSIX ACL set.
+ If num_def_acls == 0 then read/modify/write acl after removing all entries
+ except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
+****************************************************************************/
+
+BOOL set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
+{
+ SMB_ACL_T file_acl = NULL;
+
+ if (!num_acls) {
+ /* Remove the ACL from the file. */
+ return remove_posix_acl(conn, fsp, fname);
+ }
+
+ if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
+ return False;
+ }
+
+ if (fsp && fsp->fh->fd != -1) {
+ /* The preferred way - use an open fd. */
+ if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
+ DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
+ fname, strerror(errno) ));
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
+ return False;
+ }
+ } else {
+ if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
+ DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
+ fname, strerror(errno) ));
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
+ return False;
+ }
+ }
+
+ DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
+ return True;
+}
+
+/****************************************************************************
+ Check for POSIX group ACLs. If none use stat entry.
+ Return -1 if no match, 0 if match and denied, 1 if match and allowed.
+****************************************************************************/
+
+static int check_posix_acl_group_write(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
+{
+ SMB_ACL_T posix_acl = NULL;
+ int entry_id = SMB_ACL_FIRST_ENTRY;
+ SMB_ACL_ENTRY_T entry;
+ int i;
+ BOOL seen_mask = False;
+ BOOL seen_owning_group = False;
+ int ret = -1;
+ gid_t cu_gid;
+
+ if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS)) == NULL) {
+ goto check_stat;
+ }
+
+ /* First ensure the group mask allows group read. */
+ /* Also check any user entries (these take preference over group). */
+
+ while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
+ SMB_ACL_TAG_T tagtype;
+ SMB_ACL_PERMSET_T permset;
+ int have_write = -1;
+
+ /* get_next... */
+ if (entry_id == SMB_ACL_FIRST_ENTRY)
+ entry_id = SMB_ACL_NEXT_ENTRY;
+
+ if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
+ goto check_stat;
+ }
+
+ if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
+ goto check_stat;
+ }
+
+ have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
+ if (have_write == -1) {
+ goto check_stat;
+ }
+
+ /*
+ * Solaris returns 2 for this if write is available.
+ * canonicalize to 0 or 1.
+ */
+ have_write = (have_write ? 1 : 0);
+
+ switch(tagtype) {
+ case SMB_ACL_MASK:
+ seen_mask = True;
+ if (!have_write) {
+ /* We don't have any group or explicit user write permission. */
+ ret = -1; /* Allow caller to check "other" permissions. */
+ DEBUG(10,("check_posix_acl_group_write: file %s \
+refusing write due to mask.\n", fname));
+ goto done;
+ }
+ break;
+ case SMB_ACL_USER:
+ {
+ /* Check against current_user.ut.uid. */
+ uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
+ if (puid == NULL) {
+ goto check_stat;
+ }
+ if (current_user.ut.uid == *puid) {
+ /* We have a uid match but we must ensure we have seen the acl mask. */
+ ret = have_write;
+ DEBUG(10,("check_posix_acl_group_write: file %s \
+match on user %u -> %s.\n", fname, (unsigned int)*puid, ret ? "can write" : "cannot write"));
+ if (seen_mask) {
+ goto done;
+ }
+ }
+ break;
+ }
+ default:
+ continue;
+ }
+ }
+
+ /* If ret is anything other than -1 we matched on a user entry. */
+ if (ret != -1) {
+ goto done;
+ }
+
+ /* Next check all group entries. */
+ entry_id = SMB_ACL_FIRST_ENTRY;
+ while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
+ SMB_ACL_TAG_T tagtype;
+ SMB_ACL_PERMSET_T permset;
+ int have_write = -1;
+
+ /* get_next... */
+ if (entry_id == SMB_ACL_FIRST_ENTRY)
+ entry_id = SMB_ACL_NEXT_ENTRY;
+
+ if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
+ goto check_stat;
+ }
+
+ if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
+ goto check_stat;
+ }
+
+ have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
+ if (have_write == -1) {
+ goto check_stat;
+ }
+
+ /*
+ * Solaris returns 2 for this if write is available.
+ * canonicalize to 0 or 1.
+ */
+ have_write = (have_write ? 1 : 0);
+
+ switch(tagtype) {
+ case SMB_ACL_GROUP:
+ case SMB_ACL_GROUP_OBJ:
+ {
+ gid_t *pgid = NULL;
+
+ if (tagtype == SMB_ACL_GROUP) {
+ pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
+ } else {
+ seen_owning_group = True;
+ pgid = &psbuf->st_gid;
+ }
+ if (pgid == NULL) {
+ goto check_stat;
+ }
+
+ /*
+ * Does it match the current effective group
+ * or supplementary groups ?
+ */
+ for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
+ cu_gid = get_current_user_gid_next(&i)) {
+ if (cu_gid == *pgid) {
+ ret = have_write;
+ DEBUG(10,("check_posix_acl_group_write: file %s \
+match on group %u -> can write.\n", fname, (unsigned int)cu_gid ));
+
+ /* If we don't have write permission this entry doesn't
+ terminate the enumeration of the entries. */
+ if (have_write) {
+ goto done;
+ }
+ /* But does terminate the group iteration. */
+ break;
+ }
+ }
+ break;
+ }
+ default:
+ continue;
+ }
+ }
+
+ /* If ret is -1 here we didn't match on the user entry or
+ supplemental group entries. */
+
+ DEBUG(10,("check_posix_acl_group_write: ret = %d before check_stat:\n", ret));
+
+ check_stat:
+
+ /*
+ * We only check the S_IWGRP permissions if we haven't already
+ * seen an owning group SMB_ACL_GROUP_OBJ ace entry. If there is an
+ * SMB_ACL_GROUP_OBJ ace entry then the group bits in st_gid are
+ * the same as the SMB_ACL_MASK bits, not the SMB_ACL_GROUP_OBJ
+ * bits. Thanks to Marc Cousin <mcousin@sigma.fr> for pointing
+ * this out. JRA.
+ */
+
+ if (!seen_owning_group) {
+ /* Do we match on the owning group entry ? */
+ /*
+ * Does it match the current effective group
+ * or supplementary groups ?
+ */
+ for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
+ cu_gid = get_current_user_gid_next(&i)) {
+ if (cu_gid == psbuf->st_gid) {
+ ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
+ DEBUG(10,("check_posix_acl_group_write: file %s \
+match on owning group %u -> %s.\n", fname, (unsigned int)psbuf->st_gid, ret ? "can write" : "cannot write"));
+ break;
+ }
+ }
+
+ if (cu_gid == (gid_t)-1) {
+ DEBUG(10,("check_posix_acl_group_write: file %s \
+failed to match on user or group in token (ret = %d).\n", fname, ret ));
+ }
+ }
+
+ done:
+
+ if (posix_acl) {
+ SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
+ }
+
+ DEBUG(10,("check_posix_acl_group_write: file %s returning (ret = %d).\n", fname, ret ));
+ return ret;
+}
+
+/****************************************************************************
+ Actually emulate the in-kernel access checking for delete access. We need
+ this to successfully return ACCESS_DENIED on a file open for delete access.
+****************************************************************************/
+
+BOOL can_delete_file_in_directory(connection_struct *conn, const char *fname)
+{
+ SMB_STRUCT_STAT sbuf;
+ pstring dname;
+ int ret;
+
+ if (!CAN_WRITE(conn)) {
+ return False;
+ }
+
+ /* Get the parent directory permission mask and owners. */
+ pstrcpy(dname, parent_dirname(fname));
+ if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
+ return False;
+ }
+ if (!S_ISDIR(sbuf.st_mode)) {
+ return False;
+ }
+ if (current_user.ut.uid == 0 || conn->admin_user) {
+ /* I'm sorry sir, I didn't know you were root... */
+ return True;
+ }
+
+ /* Check primary owner write access. */
+ if (current_user.ut.uid == sbuf.st_uid) {
+ return (sbuf.st_mode & S_IWUSR) ? True : False;
+ }
+
+#ifdef S_ISVTX
+ /* sticky bit means delete only by owner or root. */
+ if (sbuf.st_mode & S_ISVTX) {
+ SMB_STRUCT_STAT sbuf_file;
+ if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
+ return False;
+ }
+ /*
+ * Patch from SATOH Fumiyasu <fumiyas@miraclelinux.com>
+ * for bug #3348. Don't assume owning sticky bit
+ * directory means write access allowed.
+ */
+ if (current_user.ut.uid != sbuf_file.st_uid) {
+ return False;
+ }
+ }
+#endif
+
+ /* Check group or explicit user acl entry write access. */
+ ret = check_posix_acl_group_write(conn, dname, &sbuf);
+ if (ret == 0 || ret == 1) {
+ return ret ? True : False;
+ }
+
+ /* Finally check other write access. */
+ return (sbuf.st_mode & S_IWOTH) ? True : False;
+}
+
+/****************************************************************************
+ Actually emulate the in-kernel access checking for write access. We need
+ this to successfully check for ability to write for dos filetimes.
+ Note this doesn't take into account share write permissions.
+****************************************************************************/
+
+BOOL can_write_to_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
+{
+ int ret;
+
+ if (current_user.ut.uid == 0 || conn->admin_user) {
+ /* I'm sorry sir, I didn't know you were root... */
+ return True;
+ }
+
+ if (!VALID_STAT(*psbuf)) {
+ /* Get the file permission mask and owners. */
+ if(SMB_VFS_STAT(conn, fname, psbuf) != 0) {
+ return False;
+ }
+ }
+
+ /* Check primary owner write access. */
+ if (current_user.ut.uid == psbuf->st_uid) {
+ return (psbuf->st_mode & S_IWUSR) ? True : False;
+ }
+
+ /* Check group or explicit user acl entry write access. */
+ ret = check_posix_acl_group_write(conn, fname, psbuf);
+ if (ret == 0 || ret == 1) {
+ return ret ? True : False;
+ }
+
+ /* Finally check other write access. */
+ return (psbuf->st_mode & S_IWOTH) ? True : False;
+}
+
+/********************************************************************
+ Pull the NT ACL from a file on disk or the OpenEventlog() access
+ check. Caller is responsible for freeing the returned security
+ descriptor via TALLOC_FREE(). This is designed for dealing with
+ user space access checks in smbd outside of the VFS. For example,
+ checking access rights in OpenEventlog().
+
+ Assume we are dealing with files (for now)
+********************************************************************/
+
+SEC_DESC* get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
+{
+ SEC_DESC *psd, *ret_sd;
+ connection_struct conn;
+ files_struct finfo;
+ struct fd_handle fh;
+ pstring path;
+ pstring filename;
+
+ ZERO_STRUCT( conn );
+
+ if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
+ DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
+ return NULL;
+ }
+
+ if (!(conn.params = TALLOC_P(conn.mem_ctx, struct share_params))) {
+ DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
+ TALLOC_FREE(conn.mem_ctx);
+ return NULL;
+ }
+
+ conn.params->service = -1;
+
+ pstrcpy( path, "/" );
+ set_conn_connectpath(&conn, path);
+
+ if (!smbd_vfs_init(&conn)) {
+ DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
+ conn_free_internal( &conn );
+ return NULL;
+ }
+
+ ZERO_STRUCT( finfo );
+ ZERO_STRUCT( fh );
+
+ finfo.fnum = -1;
+ finfo.conn = &conn;
+ finfo.fh = &fh;
+ finfo.fh->fd = -1;
+ pstrcpy( filename, fname );
+ finfo.fsp_name = filename;
+
+ if (get_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd ) == 0) {
+ DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
+ conn_free_internal( &conn );
+ return NULL;
+ }
+
+ ret_sd = dup_sec_desc( ctx, psd );
+
+ conn_free_internal( &conn );
+
+ return ret_sd;
+}
git.samba.org / vlendec / samba-autobuild / .git / blobdiff