1 /*
2 Unix SMB/CIFS implementation.
3
4 SMB2 Lease context handling
5
6 Copyright (C) Stefan Metzmacher 2012
7 Copyright (C) Volker Lendecke 2013
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program 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 the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24 #include "../libcli/smb/smb_common.h"
25
smb2_lease_pull(const uint8_t * buf,size_t len,struct smb2_lease * lease)26 ssize_t smb2_lease_pull(const uint8_t *buf, size_t len,
27 struct smb2_lease *lease)
28 {
29 int version;
30
31 switch (len) {
32 case 32:
33 version = 1;
34 break;
35 case 52:
36 version = 2;
37 break;
38 default:
39 return -1;
40 }
41
42 memcpy(&lease->lease_key, buf, 16);
43 lease->lease_state = IVAL(buf, 16);
44 lease->lease_flags = IVAL(buf, 20);
45 lease->lease_duration = BVAL(buf, 24);
46 lease->lease_version = version;
47
48 switch (version) {
49 case 1:
50 ZERO_STRUCT(lease->parent_lease_key);
51 lease->lease_epoch = 0;
52 break;
53 case 2:
54 memcpy(&lease->parent_lease_key, buf+32, 16);
55 lease->lease_epoch = SVAL(buf, 48);
56 break;
57 }
58
59 return len;
60 }
61
smb2_lease_push(const struct smb2_lease * lease,uint8_t * buf,size_t len)62 bool smb2_lease_push(const struct smb2_lease *lease, uint8_t *buf, size_t len)
63 {
64 int version;
65
66 switch (len) {
67 case 32:
68 version = 1;
69 break;
70 case 52:
71 version = 2;
72 break;
73 default:
74 return false;
75 }
76
77 memcpy(&buf[0], &lease->lease_key, 16);
78 SIVAL(buf, 16, lease->lease_state);
79 SIVAL(buf, 20, lease->lease_flags);
80 SBVAL(buf, 24, lease->lease_duration);
81
82 if (version == 2) {
83 memcpy(&buf[32], &lease->parent_lease_key, 16);
84 SIVAL(buf, 48, lease->lease_epoch);
85 }
86
87 return true;
88 }
89
smb2_lease_key_equal(const struct smb2_lease_key * k1,const struct smb2_lease_key * k2)90 bool smb2_lease_key_equal(const struct smb2_lease_key *k1,
91 const struct smb2_lease_key *k2)
92 {
93 return ((k1->data[0] == k2->data[0]) && (k1->data[1] == k2->data[1]));
94 }
95
smb2_lease_equal(const struct GUID * g1,const struct smb2_lease_key * k1,const struct GUID * g2,const struct smb2_lease_key * k2)96 bool smb2_lease_equal(const struct GUID *g1,
97 const struct smb2_lease_key *k1,
98 const struct GUID *g2,
99 const struct smb2_lease_key *k2)
100 {
101 return GUID_equal(g1, g2) && smb2_lease_key_equal(k1, k2);
102 }
103