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samba-mirror/source4/auth/sam.c

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/*
Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2010
Copyright (C) Gerald Carter 2003
Copyright (C) Stefan Metzmacher 2005
Copyright (C) Matthias Dieter Wallnöfer 2009
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"
#include "system/time.h"
#include "auth/auth.h"
#include <ldb.h>
#include "dsdb/samdb/samdb.h"
#include "libcli/security/security.h"
#include "auth/auth_sam.h"
#include "dsdb/common/util.h"
#include "libcli/ldap/ldap_ndr.h"
#include "param/param.h"
#define KRBTGT_ATTRS \
/* required for the krb5 kdc */ \
"objectClass", \
"sAMAccountName", \
"userPrincipalName", \
"servicePrincipalName", \
"msDS-KeyVersionNumber", \
"msDS-SecondaryKrbTgtNumber", \
"msDS-SupportedEncryptionTypes", \
"supplementalCredentials", \
"msDS-AllowedToDelegateTo", \
\
/* passwords */ \
"dBCSPwd", \
"unicodePwd", \
\
"userAccountControl", \
"msDS-User-Account-Control-Computed", \
"objectSid", \
\
"pwdLastSet", \
"msDS-UserPasswordExpiryTimeComputed", \
"accountExpires"
const char *krbtgt_attrs[] = {
KRBTGT_ATTRS, NULL
};
const char *server_attrs[] = {
KRBTGT_ATTRS, NULL
};
const char *user_attrs[] = {
KRBTGT_ATTRS,
"logonHours",
/*
* To allow us to zero the badPwdCount and lockoutTime on
* successful logon, without database churn
*/
"lockoutTime",
/* check 'allowed workstations' */
"userWorkstations",
/* required for user_info_dc, not access control: */
"displayName",
"scriptPath",
"profilePath",
"homeDirectory",
"homeDrive",
"lastLogon",
"lastLogonTimestamp",
"lastLogoff",
"accountExpires",
"badPwdCount",
"logonCount",
"primaryGroupID",
"memberOf",
"badPasswordTime",
"lmPwdHistory",
"ntPwdHistory",
NULL,
};
/****************************************************************************
Check if a user is allowed to logon at this time. Note this is the
servers local time, as logon hours are just specified as a weekly
bitmask.
****************************************************************************/
static bool logon_hours_ok(struct ldb_message *msg, const char *name_for_logs)
{
/* In logon hours first bit is Sunday from 12AM to 1AM */
const struct ldb_val *hours;
struct tm *utctime;
time_t lasttime;
const char *asct;
uint8_t bitmask, bitpos;
hours = ldb_msg_find_ldb_val(msg, "logonHours");
if (!hours) {
DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs));
return true;
}
if (hours->length != 168/8) {
DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs));
return true;
}
lasttime = time(NULL);
utctime = gmtime(&lasttime);
if (!utctime) {
DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
name_for_logs));
return false;
}
/* find the corresponding byte and bit */
bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
bitmask = 1 << (bitpos % 8);
if (! (hours->data[bitpos/8] & bitmask)) {
struct tm *t = localtime(&lasttime);
if (!t) {
asct = "INVALID TIME";
} else {
asct = asctime(t);
if (!asct) {
asct = "INVALID TIME";
}
}
DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
"logon at this time (%s).\n",
name_for_logs, asct ));
return false;
}
asct = asctime(utctime);
DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
name_for_logs, asct ? asct : "UNKNOWN TIME" ));
return true;
}
/****************************************************************************
Do a specific test for a SAM_ACCOUNT being valid for this connection
(ie not disabled, expired and the like).
****************************************************************************/
_PUBLIC_ NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
struct ldb_context *sam_ctx,
uint32_t logon_parameters,
struct ldb_dn *domain_dn,
struct ldb_message *msg,
const char *logon_workstation,
const char *name_for_logs,
bool allow_domain_trust,
bool password_change)
{
uint16_t acct_flags;
const char *workstation_list;
NTTIME acct_expiry;
NTTIME must_change_time;
struct timeval tv_now = timeval_current();
NTTIME now = timeval_to_nttime(&tv_now);
DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
acct_flags = samdb_result_acct_flags(msg, "msDS-User-Account-Control-Computed");
acct_expiry = samdb_result_account_expires(msg);
/* Check for when we must change this password, taking the
* userAccountControl flags into account */
must_change_time = samdb_result_nttime(msg,
"msDS-UserPasswordExpiryTimeComputed", 0);
workstation_list = ldb_msg_find_attr_as_string(msg, "userWorkstations", NULL);
/* Quit if the account was disabled. */
if (acct_flags & ACB_DISABLED) {
DEBUG(2,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
return NT_STATUS_ACCOUNT_DISABLED;
}
/* Quit if the account was locked out. */
if (acct_flags & ACB_AUTOLOCK) {
DEBUG(2,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
return NT_STATUS_ACCOUNT_LOCKED_OUT;
}
/* Test account expire time */
if (now > acct_expiry) {
DEBUG(2,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
nt_time_string(mem_ctx, acct_expiry)));
return NT_STATUS_ACCOUNT_EXPIRED;
}
/* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
if ((must_change_time == 0) && !password_change) {
DEBUG(2,("sam_account_ok: Account for user '%s' password must change!.\n",
name_for_logs));
return NT_STATUS_PASSWORD_MUST_CHANGE;
}
/* check for expired password (but not if this is a password change request) */
if ((must_change_time < now) && !password_change) {
DEBUG(2,("sam_account_ok: Account for user '%s' password expired!.\n",
name_for_logs));
DEBUG(2,("sam_account_ok: Password expired at '%s' unix time.\n",
nt_time_string(mem_ctx, must_change_time)));
return NT_STATUS_PASSWORD_EXPIRED;
}
/* Test workstation. Workstation list is comma separated. */
if (logon_workstation && workstation_list && *workstation_list) {
bool invalid_ws = true;
int i;
char **workstations = str_list_make(mem_ctx, workstation_list, ",");
for (i = 0; workstations && workstations[i]; i++) {
DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
workstations[i], logon_workstation));
if (strequal(workstations[i], logon_workstation)) {
invalid_ws = false;
break;
}
}
talloc_free(workstations);
if (invalid_ws) {
return NT_STATUS_INVALID_WORKSTATION;
}
}
if (!logon_hours_ok(msg, name_for_logs)) {
return NT_STATUS_INVALID_LOGON_HOURS;
}
if (!allow_domain_trust) {
if (acct_flags & ACB_DOMTRUST) {
DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
}
}
if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
if (acct_flags & ACB_SVRTRUST) {
DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
}
}
if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
/* TODO: this fails with current solaris client. We
need to work with Gordon to work out why */
if (acct_flags & ACB_WSTRUST) {
DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
}
}
return NT_STATUS_OK;
}
_PUBLIC_ NTSTATUS authsam_make_user_info_dc(TALLOC_CTX *mem_ctx,
struct ldb_context *sam_ctx,
const char *netbios_name,
const char *domain_name,
struct ldb_dn *domain_dn,
struct ldb_message *msg,
DATA_BLOB user_sess_key,
DATA_BLOB lm_sess_key,
struct auth_user_info_dc **_user_info_dc)
{
NTSTATUS status;
struct auth_user_info_dc *user_info_dc;
struct auth_user_info *info;
const char *str, *filter;
/* SIDs for the account and his primary group */
struct dom_sid *account_sid;
const char *primary_group_string;
const char *primary_group_dn;
DATA_BLOB primary_group_blob;
/* SID structures for the expanded group memberships */
struct dom_sid *sids = NULL;
unsigned int num_sids = 0, i;
struct dom_sid *domain_sid;
TALLOC_CTX *tmp_ctx;
struct ldb_message_element *el;
user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
tmp_ctx = talloc_new(user_info_dc);
if (user_info_dc == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
sids = talloc_array(user_info_dc, struct dom_sid, 2);
if (sids == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
num_sids = 2;
account_sid = samdb_result_dom_sid(user_info_dc, msg, "objectSid");
if (account_sid == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
status = dom_sid_split_rid(tmp_ctx, account_sid, &domain_sid, NULL);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(user_info_dc);
return status;
}
sids[PRIMARY_USER_SID_INDEX] = *account_sid;
sids[PRIMARY_GROUP_SID_INDEX] = *domain_sid;
sid_append_rid(&sids[PRIMARY_GROUP_SID_INDEX], ldb_msg_find_attr_as_uint(msg, "primaryGroupID", ~0));
/* Filter out builtin groups from this token. We will search
* for builtin groups later, and not include them in the PAC
* on SamLogon validation info */
filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(!(groupType:1.2.840.113556.1.4.803:=%u))(groupType:1.2.840.113556.1.4.803:=%u))", GROUP_TYPE_BUILTIN_LOCAL_GROUP, GROUP_TYPE_SECURITY_ENABLED);
if (filter == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
primary_group_string = dom_sid_string(tmp_ctx, &sids[PRIMARY_GROUP_SID_INDEX]);
if (primary_group_string == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
primary_group_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", primary_group_string);
if (primary_group_dn == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
primary_group_blob = data_blob_string_const(primary_group_dn);
/* Expands the primary group - this function takes in
* memberOf-like values, so we fake one up with the
* <SID=S-...> format of DN and then let it expand
* them, as long as they meet the filter - so only
* domain groups, not builtin groups
*
* The primary group is still treated specially, so we set the
* 'only childs' flag to true
*/
status = dsdb_expand_nested_groups(sam_ctx, &primary_group_blob, true, filter,
user_info_dc, &sids, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(user_info_dc);
return status;
}
/* Expands the additional groups */
el = ldb_msg_find_element(msg, "memberOf");
for (i = 0; el && i < el->num_values; i++) {
/* This function takes in memberOf values and expands
* them, as long as they meet the filter - so only
* domain groups, not builtin groups */
status = dsdb_expand_nested_groups(sam_ctx, &el->values[i], false, filter,
user_info_dc, &sids, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(user_info_dc);
return status;
}
}
user_info_dc->sids = sids;
user_info_dc->num_sids = num_sids;
user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
info->account_name = talloc_steal(info,
ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
info->domain_name = talloc_strdup(info, domain_name);
if (info->domain_name == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
str = ldb_msg_find_attr_as_string(msg, "displayName", "");
info->full_name = talloc_strdup(info, str);
if (info->full_name == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
str = ldb_msg_find_attr_as_string(msg, "scriptPath", "");
info->logon_script = talloc_strdup(info, str);
if (info->logon_script == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
str = ldb_msg_find_attr_as_string(msg, "profilePath", "");
info->profile_path = talloc_strdup(info, str);
if (info->profile_path == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
str = ldb_msg_find_attr_as_string(msg, "homeDirectory", "");
info->home_directory = talloc_strdup(info, str);
if (info->home_directory == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
str = ldb_msg_find_attr_as_string(msg, "homeDrive", "");
info->home_drive = talloc_strdup(info, str);
if (info->home_drive == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
info->logon_server = talloc_strdup(info, netbios_name);
if (info->logon_server == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
info->last_logoff = samdb_result_last_logoff(msg);
info->acct_expiry = samdb_result_account_expires(msg);
info->last_password_change = samdb_result_nttime(msg,
"pwdLastSet", 0);
info->allow_password_change
= samdb_result_allow_password_change(sam_ctx, mem_ctx,
domain_dn, msg, "pwdLastSet");
info->force_password_change = samdb_result_nttime(msg,
"msDS-UserPasswordExpiryTimeComputed", 0);
info->logon_count = ldb_msg_find_attr_as_uint(msg, "logonCount", 0);
info->bad_password_count = ldb_msg_find_attr_as_uint(msg, "badPwdCount",
0);
info->acct_flags = samdb_result_acct_flags(msg, "msDS-User-Account-Control-Computed");
user_info_dc->user_session_key = data_blob_talloc(user_info_dc,
user_sess_key.data,
user_sess_key.length);
if (user_sess_key.data) {
if (user_info_dc->user_session_key.data == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
}
user_info_dc->lm_session_key = data_blob_talloc(user_info_dc,
lm_sess_key.data,
lm_sess_key.length);
if (lm_sess_key.data) {
if (user_info_dc->lm_session_key.data == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
}
if (info->acct_flags & ACB_SVRTRUST) {
/* the SID_NT_ENTERPRISE_DCS SID gets added into the
PAC */
user_info_dc->sids = talloc_realloc(user_info_dc,
user_info_dc->sids,
struct dom_sid,
user_info_dc->num_sids+1);
if (user_info_dc->sids == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
user_info_dc->sids[user_info_dc->num_sids] = global_sid_Enterprise_DCs;
user_info_dc->num_sids++;
}
if ((info->acct_flags & (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) ==
(ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) {
/* the DOMAIN_RID_ENTERPRISE_READONLY_DCS PAC */
user_info_dc->sids = talloc_realloc(user_info_dc,
user_info_dc->sids,
struct dom_sid,
user_info_dc->num_sids+1);
if (user_info_dc->sids == NULL) {
TALLOC_FREE(user_info_dc);
return NT_STATUS_NO_MEMORY;
}
user_info_dc->sids[user_info_dc->num_sids] = *domain_sid;
sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
DOMAIN_RID_ENTERPRISE_READONLY_DCS);
user_info_dc->num_sids++;
}
info->authenticated = true;
talloc_free(tmp_ctx);
*_user_info_dc = user_info_dc;
return NT_STATUS_OK;
}
NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx, const char *principal,
const char **attrs,
struct ldb_dn **domain_dn,
struct ldb_message **msg)
{
struct ldb_dn *user_dn;
NTSTATUS nt_status;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
int ret;
if (!tmp_ctx) {
return NT_STATUS_NO_MEMORY;
}
nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal,
&user_dn, domain_dn);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(tmp_ctx);
return nt_status;
}
/* pull the user attributes */
ret = dsdb_search_one(sam_ctx, tmp_ctx, msg, user_dn,
LDB_SCOPE_BASE, attrs,
DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
"(objectClass=*)");
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
talloc_steal(mem_ctx, *msg);
talloc_steal(mem_ctx, *domain_dn);
talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
/* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available, and for tokenGroups in the DSDB stack.
Supply either a principal or a DN
*/
NTSTATUS authsam_get_user_info_dc_principal(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
struct ldb_context *sam_ctx,
const char *principal,
struct ldb_dn *user_dn,
struct auth_user_info_dc **user_info_dc)
{
NTSTATUS nt_status;
DATA_BLOB user_sess_key = data_blob(NULL, 0);
DATA_BLOB lm_sess_key = data_blob(NULL, 0);
struct ldb_message *msg;
struct ldb_dn *domain_dn;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
if (!tmp_ctx) {
return NT_STATUS_NO_MEMORY;
}
if (principal) {
nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
user_attrs, &domain_dn, &msg);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(tmp_ctx);
return nt_status;
}
} else if (user_dn) {
struct dom_sid *user_sid, *domain_sid;
int ret;
/* pull the user attributes */
ret = dsdb_search_one(sam_ctx, tmp_ctx, &msg, user_dn,
LDB_SCOPE_BASE, user_attrs,
DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
"(objectClass=*)");
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
talloc_free(tmp_ctx);
return NT_STATUS_NO_SUCH_USER;
} else if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
user_sid = samdb_result_dom_sid(msg, msg, "objectSid");
nt_status = dom_sid_split_rid(tmp_ctx, user_sid, &domain_sid, NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
domain_dn = samdb_search_dn(sam_ctx, mem_ctx, NULL,
"(&(objectSid=%s)(objectClass=domain))",
ldap_encode_ndr_dom_sid(tmp_ctx, domain_sid));
if (!domain_dn) {
DEBUG(3, ("authsam_get_user_info_dc_principal: Failed to find domain with: SID %s\n",
dom_sid_string(tmp_ctx, domain_sid)));
return NT_STATUS_NO_SUCH_USER;
}
} else {
return NT_STATUS_INVALID_PARAMETER;
}
nt_status = authsam_make_user_info_dc(tmp_ctx, sam_ctx,
lpcfg_netbios_name(lp_ctx),
lpcfg_workgroup(lp_ctx),
domain_dn,
msg,
user_sess_key, lm_sess_key,
user_info_dc);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(tmp_ctx);
return nt_status;
}
talloc_steal(mem_ctx, *user_info_dc);
talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
NTSTATUS authsam_update_bad_pwd_count(struct ldb_context *sam_ctx,
struct ldb_message *msg,
struct ldb_dn *domain_dn)
{
const char *attrs[] = { "lockoutThreshold",
"lockOutObservationWindow",
"lockoutDuration",
"pwdProperties",
NULL };
int ret;
NTSTATUS status;
struct ldb_result *domain_res;
struct ldb_message *msg_mod = NULL;
TALLOC_CTX *mem_ctx;
mem_ctx = talloc_new(msg);
if (mem_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
ret = dsdb_search_dn(sam_ctx, mem_ctx, &domain_res, domain_dn, attrs, 0);
if (ret != LDB_SUCCESS) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
status = dsdb_update_bad_pwd_count(mem_ctx, sam_ctx,
msg, domain_res->msgs[0], &msg_mod);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(mem_ctx);
return status;
}
if (msg_mod != NULL) {
ret = dsdb_modify(sam_ctx, msg_mod, 0);
if (ret != LDB_SUCCESS) {
DEBUG(0, ("Failed to update badPwdCount, badPasswordTime or set lockoutTime on %s: %s\n",
ldb_dn_get_linearized(msg_mod->dn), ldb_errstring(sam_ctx)));
TALLOC_FREE(mem_ctx);
return NT_STATUS_INTERNAL_ERROR;
}
}
TALLOC_FREE(mem_ctx);
return NT_STATUS_OK;
}
static NTSTATUS authsam_update_lastlogon_timestamp(struct ldb_context *sam_ctx,
struct ldb_message *msg_mod,
struct ldb_dn *domain_dn,
NTTIME old_timestamp,
NTTIME now)
{
/*
* We only set lastLogonTimestamp if the current value is older than
* now - msDS-LogonTimeSyncInterval days.
*
* msDS-LogonTimeSyncInterval is an int32_t number of days, while
* lastLogonTimestamp is in the 64 bit 100ns NTTIME format.
*
* The docs say: "the initial update, after the domain functional
* level is raised to DS_BEHAVIOR_WIN2003 or higher, is calculated as
* 14 days minus a random percentage of 5 days", but we aren't doing
* that. The blogosphere seems to think that this randomised update
* happens everytime, but [MS-ADA1] doesn't agree.
*
* Dochelp referred us to the following blog post:
* http://blogs.technet.com/b/askds/archive/2009/04/15/the-lastlogontimestamp-attribute-what-it-was-designed-for-and-how-it-works.aspx
*
* en msDS-LogonTimeSyncInterval is zero, the lastLogonTimestamp is
* not changed.
*/
static const char *attrs[] = { "msDS-LogonTimeSyncInterval",
NULL };
int ret;
struct ldb_result *domain_res = NULL;
TALLOC_CTX *mem_ctx = NULL;
int32_t sync_interval;
NTTIME sync_interval_nt;
mem_ctx = talloc_new(msg_mod);
if (mem_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
ret = dsdb_search_dn(sam_ctx, mem_ctx, &domain_res, domain_dn, attrs,
0);
if (ret != LDB_SUCCESS || domain_res->count != 1) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
sync_interval = ldb_msg_find_attr_as_int(domain_res->msgs[0],
"msDS-LogonTimeSyncInterval",
14);
DEBUG(5, ("sync interval is %d\n", sync_interval));
if (sync_interval == 0){
/*
* Setting msDS-LogonTimeSyncInterval to zero is how you ask
* that nothing happens here.
*/
TALLOC_FREE(mem_ctx);
return NT_STATUS_OK;
}
else if (sync_interval >= 5){
/*
* Subtract "a random percentage of 5" days. Presumably this
* percentage is between 0 and 100, and modulus is accurate
* enough.
*/
uint32_t r = generate_random() % 6;
sync_interval -= r;
DEBUG(5, ("randomised sync interval is %d (-%d)\n", sync_interval, r));
}
/* In the case where sync_interval < 5 there is no randomisation */
sync_interval_nt = sync_interval * 24LL * 3600LL * 10000000LL;
DEBUG(5, ("old timestamp is %lld, threshold %lld, diff %lld\n",
(long long int)old_timestamp,
(long long int)(now - sync_interval_nt),
(long long int)(old_timestamp - now + sync_interval_nt)));
if (old_timestamp > now){
DEBUG(0, ("lastLogonTimestamp is in the future! (%lld > %lld)\n",
(long long int)old_timestamp, (long long int)now));
/* then what? */
} else if (old_timestamp < now - sync_interval_nt){
DEBUG(5, ("updating lastLogonTimestamp to %lld\n",
(long long int)now));
/* The time has come to update lastLogonTimestamp */
ret = samdb_msg_add_int64(sam_ctx, msg_mod, msg_mod,
"lastLogonTimestamp", now);
if (ret != LDB_SUCCESS) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
}
TALLOC_FREE(mem_ctx);
return NT_STATUS_OK;
}
/* Reset the badPwdCount to zero and update the lastLogon time. */
NTSTATUS authsam_logon_success_accounting(struct ldb_context *sam_ctx,
const struct ldb_message *msg,
struct ldb_dn *domain_dn,
bool interactive_or_kerberos)
{
int ret;
NTSTATUS status;
int badPwdCount;
int64_t lockoutTime;
struct ldb_message *msg_mod;
TALLOC_CTX *mem_ctx;
struct timeval tv_now;
NTTIME now;
NTTIME lastLogonTimestamp;
NTTIME lastLogon;
mem_ctx = talloc_new(msg);
if (mem_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
lockoutTime = ldb_msg_find_attr_as_int64(msg, "lockoutTime", 0);
if (interactive_or_kerberos) {
badPwdCount = ldb_msg_find_attr_as_int(msg, "badPwdCount", 0);
} else {
badPwdCount = samdb_result_effective_badPwdCount(sam_ctx, mem_ctx,
domain_dn, msg);
}
lastLogonTimestamp =
ldb_msg_find_attr_as_int64(msg, "lastLogonTimestamp", 0);
lastLogon = ldb_msg_find_attr_as_int64(msg, "lastLogon", 0);
DEBUG(5, ("lastLogonTimestamp is %lld\n",
(long long int)lastLogonTimestamp));
msg_mod = ldb_msg_new(mem_ctx);
if (msg_mod == NULL) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
msg_mod->dn = msg->dn;
if (lockoutTime != 0) {
/*
* This implies "badPwdCount" = 0, see samldb_lockout_time()
*/
ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod, "lockoutTime", 0);
if (ret != LDB_SUCCESS) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
} else if (badPwdCount != 0) {
ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod, "badPwdCount", 0);
if (ret != LDB_SUCCESS) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
}
tv_now = timeval_current();
now = timeval_to_nttime(&tv_now);
if (interactive_or_kerberos || lastLogon == 0 ||
(badPwdCount != 0 && lockoutTime == 0)) {
ret = samdb_msg_add_int64(sam_ctx, msg_mod, msg_mod,
"lastLogon", now);
if (ret != LDB_SUCCESS) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
}
status = authsam_update_lastlogon_timestamp(sam_ctx, msg_mod, domain_dn,
lastLogonTimestamp, now);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
if (msg_mod->num_elements > 0) {
ret = dsdb_replace(sam_ctx, msg_mod, 0);
if (ret != LDB_SUCCESS) {
DEBUG(0, ("Failed to set badPwdCount and lockoutTime "
"to 0 and/or lastlogon to now (%lld) "
"%s: %s\n", (long long int)now,
ldb_dn_get_linearized(msg_mod->dn),
ldb_errstring(sam_ctx)));
TALLOC_FREE(mem_ctx);
return NT_STATUS_INTERNAL_ERROR;
}
}
TALLOC_FREE(mem_ctx);
return NT_STATUS_OK;
}