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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "bus-common-errors.h"
#include "errno-util.h"
#include "home-util.h"
#include "libcrypt-util.h"
#include "pwquality-util.h"
#include "strv.h"
#include "user-record-pwquality.h"
#include "user-record-util.h"
#if HAVE_PWQUALITY
int user_record_quality_check_password(
UserRecord *hr,
UserRecord *secret,
sd_bus_error *error) {
_cleanup_(sym_pwquality_free_settingsp) pwquality_settings_t *pwq = NULL;
char buf[PWQ_MAX_ERROR_MESSAGE_LEN], **pp;
void *auxerror;
int r;
assert(hr);
assert(secret);
r = pwq_allocate_context(&pwq);
if (ERRNO_IS_NOT_SUPPORTED(r))
return 0;
if (r < 0)
return log_debug_errno(r, "Failed to allocate libpwquality context: %m");
/* This is a bit more complex than one might think at first. pwquality_check() would like to know the
* old password to make security checks. We support arbitrary numbers of passwords however, hence we
* call the function once for each combination of old and new password. */
/* Iterate through all new passwords */
STRV_FOREACH(pp, secret->password) {
bool called = false;
char **old;
r = test_password_many(hr->hashed_password, *pp);
if (r < 0)
return r;
if (r == 0) /* This is an old password as it isn't listed in the hashedPassword field, skip it */
continue;
/* Check this password against all old passwords */
STRV_FOREACH(old, secret->password) {
if (streq(*pp, *old))
continue;
r = test_password_many(hr->hashed_password, *old);
if (r < 0)
return r;
if (r > 0) /* This is a new password, not suitable as old password */
continue;
r = sym_pwquality_check(pwq, *pp, *old, hr->user_name, &auxerror);
if (r < 0)
return sd_bus_error_setf(error, BUS_ERROR_LOW_PASSWORD_QUALITY, "Password too weak: %s",
sym_pwquality_strerror(buf, sizeof(buf), r, auxerror));
called = true;
}
if (called)
continue;
/* If there are no old passwords, let's call pwquality_check() without any. */
r = sym_pwquality_check(pwq, *pp, NULL, hr->user_name, &auxerror);
if (r < 0)
return sd_bus_error_setf(error, BUS_ERROR_LOW_PASSWORD_QUALITY, "Password too weak: %s",
sym_pwquality_strerror(buf, sizeof(buf), r, auxerror));
}
return 1;
}
#else
int user_record_quality_check_password(
UserRecord *hr,
UserRecord *secret,
sd_bus_error *error) {
return 0;
}
#endif
|
