135 строки
4.2 KiB
C
135 строки
4.2 KiB
C
|
/*
|
||
|
|
* fs/cifs/cifsacl.c
|
||
|
|
*
|
||
|
|
* Copyright (C) International Business Machines Corp., 2007
|
||
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
||
|
|
*
|
||
|
|
* Contains the routines for mapping CIFS/NTFS ACLs
|
||
|
|
*
|
||
|
|
* This library is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Lesser General Public License as published
|
||
|
|
* by the Free Software Foundation; either version 2.1 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This library is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
||
|
|
* the GNU Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public License
|
||
|
|
* along with this library; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* security id for everyone */
|
||
|
|
static const struct cifs_sid sid_everyone =
|
||
|
|
{1, 1, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}};
|
||
|
|
/* group users */
|
||
|
|
static const struct cifs_sid sid_user =
|
||
|
|
{1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}};
|
||
|
|
|
||
|
|
static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
|
||
|
|
{
|
||
|
|
/* BB need to add parm so we can store the SID BB */
|
||
|
|
|
||
|
|
/* validate that we do not go past end of acl */
|
||
|
|
if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) {
|
||
|
|
cERROR(1, ("ACL to small to parse SID"));
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
||
|
|
cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
|
||
|
|
psid->revision, psid->num_auth, psid->sub_auth[0]));
|
||
|
|
|
||
|
|
/* BB add length check to make sure that we do not have huge num auths
|
||
|
|
and therefore go off the end */
|
||
|
|
cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_auth])));
|
||
|
|
#endif
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Convert CIFS ACL to POSIX form */
|
||
|
|
int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int num_aces = 0;
|
||
|
|
int acl_size;
|
||
|
|
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
|
||
|
|
struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
|
||
|
|
struct cifs_ntace **ppntace;
|
||
|
|
struct cifs_ace **ppace;
|
||
|
|
char *acl_base;
|
||
|
|
char *end_of_acl = ((char *)pntsd) + acl_len;
|
||
|
|
|
||
|
|
owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
|
||
|
|
cpu_to_le32(pntsd->osidoffset));
|
||
|
|
group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
|
||
|
|
cpu_to_le32(pntsd->gsidoffset));
|
||
|
|
dacl_ptr = (struct cifs_acl *)((char *)pntsd +
|
||
|
|
cpu_to_le32(pntsd->dacloffset));
|
||
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
||
|
|
cFYI(1, ("revision %d type 0x%x ooffset 0x%x goffset 0x%x "
|
||
|
|
"sacloffset 0x%x dacloffset 0x%x",
|
||
|
|
pntsd->revision, pntsd->type,
|
||
|
|
pntsd->osidoffset, pntsd->gsidoffset, pntsd->sacloffset,
|
||
|
|
pntsd->dacloffset));
|
||
|
|
#endif
|
||
|
|
rc = parse_sid(owner_sid_ptr, end_of_acl);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
rc = parse_sid(group_sid_ptr, end_of_acl);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
/* cifscred->uid = owner_sid_ptr->rid;
|
||
|
|
cifscred->gid = group_sid_ptr->rid;
|
||
|
|
memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
|
||
|
|
sizeof (struct cifs_sid));
|
||
|
|
memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
|
||
|
|
sizeof (struct cifs_sid)); */
|
||
|
|
|
||
|
|
num_aces = cpu_to_le32(dacl_ptr->num_aces);
|
||
|
|
cFYI(1, ("num aces %d", num_aces));
|
||
|
|
if (num_aces > 0) {
|
||
|
|
ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
|
||
|
|
GFP_KERNEL);
|
||
|
|
ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
|
||
|
|
GFP_KERNEL);
|
||
|
|
|
||
|
|
/* cifscred->cecount = dacl_ptr->num_aces;
|
||
|
|
cifscred->ntaces = kmalloc(num_aces *
|
||
|
|
sizeof(struct cifs_ntace *), GFP_KERNEL);
|
||
|
|
cifscred->aces = kmalloc(num_aces *
|
||
|
|
sizeof(struct cifs_ace *), GFP_KERNEL);*/
|
||
|
|
|
||
|
|
acl_base = (char *)dacl_ptr;
|
||
|
|
acl_size = sizeof(struct cifs_acl);
|
||
|
|
|
||
|
|
for (i = 0; i < num_aces; ++i) {
|
||
|
|
ppntace[i] = (struct cifs_ntace *)
|
||
|
|
(acl_base + acl_size);
|
||
|
|
ppace[i] = (struct cifs_ace *)
|
||
|
|
((char *)ppntace[i] +
|
||
|
|
sizeof(struct cifs_ntace));
|
||
|
|
|
||
|
|
/* memcpy((void *)(&(cifscred->ntaces[i])),
|
||
|
|
(void *)ntace_ptrptr[i],
|
||
|
|
sizeof(struct cifs_ntace));
|
||
|
|
memcpy((void *)(&(cifscred->aces[i])),
|
||
|
|
(void *)ace_ptrptr[i],
|
||
|
|
sizeof(struct cifs_ace)); */
|
||
|
|
|
||
|
|
acl_base = (char *)ppntace[i];
|
||
|
|
acl_size = cpu_to_le32(ppntace[i]->size);
|
||
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
||
|
|
cFYI(1, ("ACE revision:%d", ppace[i]->revision));
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
kfree(ppace);
|
||
|
|
kfree(ppntace);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|