1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* Unix SMB/CIFS implementation.
* Generate AFS tickets
* Copyright (C) Volker Lendecke 2004
*
* 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
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#ifdef WITH_FAKE_KASERVER
#define NO_ASN1_TYPEDEFS 1
#include <afs/stds.h>
#include <afs/afs.h>
#include <afs/auth.h>
#include <afs/venus.h>
#include <asm/unistd.h>
#include <openssl/des.h>
#include <sys/syscall.h>
int afs_syscall( int subcall,
char * path,
int cmd,
char * cmarg,
int follow)
{
return( syscall( SYS_afs_syscall, subcall, path, cmd, cmarg, follow));
}
struct ClearToken {
uint32 AuthHandle;
char HandShakeKey[8];
uint32 ViceId;
uint32 BeginTimestamp;
uint32 EndTimestamp;
};
static bool afs_decode_token(const char *string, char **cell,
DATA_BLOB *ticket, struct ClearToken *ct)
{
DATA_BLOB blob;
struct ClearToken result_ct;
char *saveptr;
char *s = SMB_STRDUP(string);
char *t;
if ((t = strtok_r(s, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
*cell = SMB_STRDUP(t);
if ((t = strtok_r(NULL, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
if (sscanf(t, "%u", &result_ct.AuthHandle) != 1) {
DEBUG(10, ("sscanf AuthHandle failed\n"));
return False;
}
if ((t = strtok_r(NULL, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
blob = base64_decode_data_blob(t);
if ( (blob.data == NULL) ||
(blob.length != sizeof(result_ct.HandShakeKey) )) {
DEBUG(10, ("invalid key: %x/%d\n", (uint32)blob.data,
blob.length));
return False;
}
memcpy(result_ct.HandShakeKey, blob.data, blob.length);
data_blob_free(&blob);
if ((t = strtok_r(NULL, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
if (sscanf(t, "%u", &result_ct.ViceId) != 1) {
DEBUG(10, ("sscanf ViceId failed\n"));
return False;
}
if ((t = strtok_r(NULL, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
if (sscanf(t, "%u", &result_ct.BeginTimestamp) != 1) {
DEBUG(10, ("sscanf BeginTimestamp failed\n"));
return False;
}
if ((t = strtok_r(NULL, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
if (sscanf(t, "%u", &result_ct.EndTimestamp) != 1) {
DEBUG(10, ("sscanf EndTimestamp failed\n"));
return False;
}
if ((t = strtok_r(NULL, "\n", &saveptr)) == NULL) {
DEBUG(10, ("strtok_r failed\n"));
return False;
}
blob = base64_decode_data_blob(t);
if (blob.data == NULL) {
DEBUG(10, ("Could not get ticket\n"));
return False;
}
*ticket = blob;
*ct = result_ct;
return True;
}
/*
Put an AFS token into the Kernel so that it can authenticate against
the AFS server. This assumes correct local uid settings.
This is currently highly Linux and OpenAFS-specific. The correct API
call for this would be ktc_SetToken. But to do that we would have to
import a REALLY big bunch of libraries which I would currently like
to avoid.
*/
static bool afs_settoken(const char *cell,
const struct ClearToken *ctok,
DATA_BLOB ticket)
{
int ret;
struct {
char *in, *out;
uint16 in_size, out_size;
} iob;
char buf[1024];
char *p = buf;
int tmp;
memcpy(p, &ticket.length, sizeof(uint32));
p += sizeof(uint32);
memcpy(p, ticket.data, ticket.length);
p += ticket.length;
tmp = sizeof(struct ClearToken);
memcpy(p, &tmp, sizeof(uint32));
p += sizeof(uint32);
memcpy(p, ctok, tmp);
p += tmp;
tmp = 0;
memcpy(p, &tmp, sizeof(uint32));
p += sizeof(uint32);
tmp = strlen(cell);
if (tmp >= MAXKTCREALMLEN) {
DEBUG(1, ("Realm too long\n"));
return False;
}
strncpy(p, cell, tmp);
p += tmp;
*p = 0;
p +=1;
iob.in = buf;
iob.in_size = PTR_DIFF(p,buf);
iob.out = buf;
iob.out_size = sizeof(buf);
#if 0
file_save("/tmp/ioctlbuf", iob.in, iob.in_size);
#endif
ret = afs_syscall(AFSCALL_PIOCTL, 0, VIOCSETTOK, (char *)&iob, 0);
DEBUG(10, ("afs VIOCSETTOK returned %d\n", ret));
return (ret == 0);
}
bool afs_settoken_str(const char *token_string)
{
DATA_BLOB ticket;
struct ClearToken ct;
bool result;
char *cell;
if (!afs_decode_token(token_string, &cell, &ticket, &ct))
return False;
if (geteuid() != 0)
ct.ViceId = getuid();
result = afs_settoken(cell, &ct, ticket);
SAFE_FREE(cell);
data_blob_free(&ticket);
return result;
}
#else
bool afs_settoken_str(const char *token_string)
{
return False;
}
#endif
|
