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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "chattr-util.h"
#include "fd-util.h"
#include "iovec-util.h"
#include "journal-file-util.h"
#include "journal-verify.h"
#include "log.h"
#include "mmap-cache.h"
#include "rm-rf.h"
#include "strv.h"
#include "terminal-util.h"
#include "tests.h"
#define N_ENTRIES 6000
#define RANDOM_RANGE 77
static void bit_toggle(const char *fn, uint64_t p) {
uint8_t b;
ssize_t r;
int fd;
fd = open(fn, O_RDWR|O_CLOEXEC);
assert_se(fd >= 0);
r = pread(fd, &b, 1, p/8);
assert_se(r == 1);
b ^= 1 << (p % 8);
r = pwrite(fd, &b, 1, p/8);
assert_se(r == 1);
safe_close(fd);
}
static int raw_verify(const char *fn, const char *verification_key) {
_cleanup_(mmap_cache_unrefp) MMapCache *m = NULL;
JournalFile *f;
int r;
m = mmap_cache_new();
assert_se(m != NULL);
r = journal_file_open(
/* fd= */ -1,
fn,
O_RDONLY,
JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0),
0666,
/* compress_threshold_bytes= */ UINT64_MAX,
/* metrics= */ NULL,
m,
/* template= */ NULL,
&f);
if (r < 0)
return r;
r = journal_file_verify(f, verification_key, NULL, NULL, NULL, false);
(void) journal_file_close(f);
return r;
}
static int run_test(const char *verification_key, ssize_t max_iterations) {
_cleanup_(mmap_cache_unrefp) MMapCache *m = NULL;
char t[] = "/var/tmp/journal-XXXXXX";
struct stat st;
JournalFile *f;
JournalFile *df;
usec_t from = 0, to = 0, total = 0;
uint64_t start, end;
int r;
m = mmap_cache_new();
assert_se(m != NULL);
/* journal_file_open() requires a valid machine id */
if (sd_id128_get_machine(NULL) < 0)
return log_tests_skipped("No valid machine ID found");
test_setup_logging(LOG_DEBUG);
assert_se(mkdtemp(t));
assert_se(chdir(t) >= 0);
(void) chattr_path(t, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
log_info("Generating a test journal");
assert_se(journal_file_open(
/* fd= */ -1,
"test.journal",
O_RDWR|O_CREAT,
JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0),
0666,
/* compress_threshold_bytes= */ UINT64_MAX,
/* metrics= */ NULL,
m,
/* template= */ NULL,
&df) == 0);
for (size_t n = 0; n < N_ENTRIES; n++) {
_cleanup_free_ char *test = NULL;
struct iovec iovec;
struct dual_timestamp ts;
dual_timestamp_get(&ts);
assert_se(asprintf(&test, "RANDOM=%li", random() % RANDOM_RANGE));
iovec = IOVEC_MAKE_STRING(test);
assert_se(journal_file_append_entry(
df,
&ts,
/* boot_id= */ NULL,
&iovec,
/* n_iovec= */ 1,
/* seqnum= */ NULL,
/* seqnum_id= */ NULL,
/* ret_object= */ NULL,
/* ret_offset= */ NULL) == 0);
}
(void) journal_file_offline_close(df);
log_info("Verifying with key: %s", strna(verification_key));
assert_se(journal_file_open(
/* fd= */ -1,
"test.journal",
O_RDONLY,
JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0),
0666,
/* compress_threshold_bytes= */ UINT64_MAX,
/* metrics= */ NULL,
m,
/* template= */ NULL,
&f) == 0);
journal_file_print_header(f);
journal_file_dump(f);
assert_se(journal_file_verify(f, verification_key, &from, &to, &total, true) >= 0);
if (verification_key && JOURNAL_HEADER_SEALED(f->header))
log_info("=> Validated from %s to %s, %s missing",
FORMAT_TIMESTAMP(from),
FORMAT_TIMESTAMP(to),
FORMAT_TIMESPAN(total > to ? total - to : 0, 0));
(void) journal_file_close(f);
assert_se(stat("test.journal", &st) >= 0);
start = 38448 * 8 + 0;
end = max_iterations < 0 ? (uint64_t)st.st_size * 8 : start + max_iterations;
log_info("Toggling bits %"PRIu64 " to %"PRIu64, start, end);
for (uint64_t p = start; p < end; p++) {
bit_toggle("test.journal", p);
if (max_iterations < 0)
log_info("[ %"PRIu64"+%"PRIu64"]", p / 8, p % 8);
r = raw_verify("test.journal", verification_key);
/* Suppress the notice when running in the limited (CI) mode */
if (verification_key && max_iterations < 0 && r >= 0)
log_notice(ANSI_HIGHLIGHT_RED ">>>> %"PRIu64" (bit %"PRIu64") can be toggled without detection." ANSI_NORMAL, p / 8, p % 8);
bit_toggle("test.journal", p);
}
assert_se(rm_rf(t, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
return 0;
}
int main(int argc, char *argv[]) {
const char *verification_key = NULL;
int max_iterations = 512;
if (argc > 1) {
/* Don't limit the number of iterations when the verification key
* is provided on the command line, we want to do that only in CIs */
verification_key = argv[1];
max_iterations = -1;
}
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "0", 1) >= 0);
run_test(verification_key, max_iterations);
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "1", 1) >= 0);
run_test(verification_key, max_iterations);
#if HAVE_GCRYPT
/* If we're running without any arguments and we're compiled with gcrypt
* check the journal verification stuff with a valid key as well */
if (argc <= 1) {
verification_key = "c262bd-85187f-0b1b04-877cc5/1c7af8-35a4e900";
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "0", 1) >= 0);
run_test(verification_key, max_iterations);
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "1", 1) >= 0);
run_test(verification_key, max_iterations);
}
#endif
return 0;
}
|
