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/* 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 "password-quality-util.h"
#include "strv.h"
#include "user-record-password-quality.h"
#include "user-record-util.h"
#if HAVE_PASSWDQC || HAVE_PWQUALITY
int user_record_check_password_quality(
UserRecord *hr,
UserRecord *secret,
sd_bus_error *error) {
_cleanup_free_ char *auxerror = NULL;
int r;
assert(hr);
assert(secret);
/* This is a bit more complex than one might think at first. check_password_quality() 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;
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 = check_password_quality(*pp, *old, hr->user_name, &auxerror);
if (r <= 0)
goto error;
called = true;
}
if (called)
continue;
/* If there are no old passwords, let's call check_password_quality() without any. */
r = check_password_quality(*pp, /* old */ NULL, hr->user_name, &auxerror);
if (r <= 0)
goto error;
}
return 1;
error:
if (r == 0)
return sd_bus_error_setf(error, BUS_ERROR_LOW_PASSWORD_QUALITY,
"Password too weak: %s", auxerror);
if (ERRNO_IS_NOT_SUPPORTED(r))
return 0;
return log_debug_errno(r, "Failed to check password quality: %m");
}
#else
int user_record_check_password_quality(
UserRecord *hr,
UserRecord *secret,
sd_bus_error *error) {
return 0;
}
#endif
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