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
|
/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2016 Lennart Poettering
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include "alloc-util.h"
#include "crypt-util.h"
#include "hexdecoct.h"
#include "log.h"
#include "string-util.h"
static char *arg_root_hash = NULL;
static char *arg_data_what = NULL;
static char *arg_hash_what = NULL;
static int help(void) {
printf("%s attach VOLUME DATADEVICE HASHDEVICE ROOTHASH\n"
"%s detach VOLUME\n\n"
"Attaches or detaches an integrity protected block device.\n",
program_invocation_short_name,
program_invocation_short_name);
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_(crypt_freep) struct crypt_device *cd = NULL;
int r;
if (argc <= 1) {
r = help();
goto finish;
}
if (argc < 3) {
log_error("This program requires at least two arguments.");
r = -EINVAL;
goto finish;
}
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
if (streq(argv[1], "attach")) {
_cleanup_free_ void *m = NULL;
crypt_status_info status;
size_t l;
if (argc < 6) {
log_error("attach requires at least two arguments.");
r = -EINVAL;
goto finish;
}
r = unhexmem(argv[5], strlen(argv[5]), &m, &l);
if (r < 0) {
log_error("Failed to parse root hash.");
goto finish;
}
r = crypt_init(&cd, argv[4]);
if (r < 0) {
log_error_errno(r, "Failed to open verity device %s: %m", argv[4]);
goto finish;
}
crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
status = crypt_status(cd, argv[2]);
if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
log_info("Volume %s already active.", argv[2]);
r = 0;
goto finish;
}
r = crypt_load(cd, CRYPT_VERITY, NULL);
if (r < 0) {
log_error_errno(r, "Failed to load verity superblock: %m");
goto finish;
}
r = crypt_set_data_device(cd, argv[3]);
if (r < 0) {
log_error_errno(r, "Failed to configure data device: %m");
goto finish;
}
r = crypt_activate_by_volume_key(cd, argv[2], m, l, CRYPT_ACTIVATE_READONLY);
if (r < 0) {
log_error_errno(r, "Failed to set up verity device: %m");
goto finish;
}
} else if (streq(argv[1], "detach")) {
r = crypt_init_by_name(&cd, argv[2]);
if (r == -ENODEV) {
log_info("Volume %s already inactive.", argv[2]);
goto finish;
} else if (r < 0) {
log_error_errno(r, "crypt_init_by_name() failed: %m");
goto finish;
}
crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
r = crypt_deactivate(cd, argv[2]);
if (r < 0) {
log_error_errno(r, "Failed to deactivate: %m");
goto finish;
}
} else {
log_error("Unknown verb %s.", argv[1]);
r = -EINVAL;
goto finish;
}
r = 0;
finish:
free(arg_root_hash);
free(arg_data_what);
free(arg_hash_what);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
