blob: 11ac13336ecbf7ea1010da3a37045f89278126c3 [file] [log] [blame]
Steve Frenchbcb02032007-09-25 16:17:24 +00001/*
2 * fs/cifs/cifsacl.c
3 *
4 * Copyright (C) International Business Machines Corp., 2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * Contains the routines for mapping CIFS/NTFS ACLs
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24/* security id for everyone */
25static const struct cifs_sid sid_everyone =
26 {1, 1, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}};
27/* group users */
28static const struct cifs_sid sid_user =
29 {1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}};
30
31static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
32{
33 /* BB need to add parm so we can store the SID BB */
34
35 /* validate that we do not go past end of acl */
36 if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) {
37 cERROR(1, ("ACL to small to parse SID"));
38 return -EINVAL;
39 }
40#ifdef CONFIG_CIFS_DEBUG2
41 cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
42 psid->revision, psid->num_auth, psid->sub_auth[0]));
43
44 /* BB add length check to make sure that we do not have huge num auths
45 and therefore go off the end */
46 cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_auth])));
47#endif
48 return 0;
49}
50
51/* Convert CIFS ACL to POSIX form */
52int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
53{
54 int i;
55 int num_aces = 0;
56 int acl_size;
57 struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
58 struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
59 struct cifs_ntace **ppntace;
60 struct cifs_ace **ppace;
61 char *acl_base;
62 char *end_of_acl = ((char *)pntsd) + acl_len;
63
64 owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
65 cpu_to_le32(pntsd->osidoffset));
66 group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
67 cpu_to_le32(pntsd->gsidoffset));
68 dacl_ptr = (struct cifs_acl *)((char *)pntsd +
69 cpu_to_le32(pntsd->dacloffset));
70#ifdef CONFIG_CIFS_DEBUG2
71 cFYI(1, ("revision %d type 0x%x ooffset 0x%x goffset 0x%x "
72 "sacloffset 0x%x dacloffset 0x%x",
73 pntsd->revision, pntsd->type,
74 pntsd->osidoffset, pntsd->gsidoffset, pntsd->sacloffset,
75 pntsd->dacloffset));
76#endif
77 rc = parse_sid(owner_sid_ptr, end_of_acl);
78 if (rc)
79 return rc;
80
81 rc = parse_sid(group_sid_ptr, end_of_acl);
82 if (rc)
83 return rc;
84
85/* cifscred->uid = owner_sid_ptr->rid;
86 cifscred->gid = group_sid_ptr->rid;
87 memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
88 sizeof (struct cifs_sid));
89 memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
90 sizeof (struct cifs_sid)); */
91
92 num_aces = cpu_to_le32(dacl_ptr->num_aces);
93 cFYI(1, ("num aces %d", num_aces));
94 if (num_aces > 0) {
95 ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
96 GFP_KERNEL);
97 ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
98 GFP_KERNEL);
99
100/* cifscred->cecount = dacl_ptr->num_aces;
101 cifscred->ntaces = kmalloc(num_aces *
102 sizeof(struct cifs_ntace *), GFP_KERNEL);
103 cifscred->aces = kmalloc(num_aces *
104 sizeof(struct cifs_ace *), GFP_KERNEL);*/
105
106 acl_base = (char *)dacl_ptr;
107 acl_size = sizeof(struct cifs_acl);
108
109 for (i = 0; i < num_aces; ++i) {
110 ppntace[i] = (struct cifs_ntace *)
111 (acl_base + acl_size);
112 ppace[i] = (struct cifs_ace *)
113 ((char *)ppntace[i] +
114 sizeof(struct cifs_ntace));
115
116/* memcpy((void *)(&(cifscred->ntaces[i])),
117 (void *)ntace_ptrptr[i],
118 sizeof(struct cifs_ntace));
119 memcpy((void *)(&(cifscred->aces[i])),
120 (void *)ace_ptrptr[i],
121 sizeof(struct cifs_ace)); */
122
123 acl_base = (char *)ppntace[i];
124 acl_size = cpu_to_le32(ppntace[i]->size);
125#ifdef CONFIG_CIFS_DEBUG2
126 cFYI(1, ("ACE revision:%d", ppace[i]->revision));
127#endif
128 }
129 kfree(ppace);
130 kfree(ppntace);
131 }
132
133 return (0);
134}