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samba-mirror/source4/kdc/hdb-samba4.c
Andrew Bartlett f498ba77df heimdal: Pass extra information to hdb_auth_status() to log success and failures
We now pass on the original client name and the client address to allow
consistent audit logging in Samba across multiple protocols.

We use config->db[0] to find the first database to record incorrect
users.

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
2017-03-29 02:37:28 +02:00

486 lines
13 KiB
C

/*
* Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
* Copyright (c) 2004-2009, Andrew Bartlett <abartlet@samba.org>.
* Copyright (c) 2004, Stefan Metzmacher <metze@samba.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of PADL Software nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "includes.h"
#include "kdc/kdc-glue.h"
#include "kdc/db-glue.h"
#include "auth/auth_sam.h"
#include "auth/common_auth.h"
#include <ldb.h>
#include "sdb.h"
#include "sdb_hdb.h"
#include "dsdb/samdb/samdb.h"
#include "param/param.h"
#include "../lib/tsocket/tsocket.h"
static krb5_error_code hdb_samba4_open(krb5_context context, HDB *db, int flags, mode_t mode)
{
if (db->hdb_master_key_set) {
krb5_error_code ret = HDB_ERR_NOENTRY;
krb5_warnx(context, "hdb_samba4_open: use of a master key incompatible with LDB\n");
krb5_set_error_message(context, ret, "hdb_samba4_open: use of a master key incompatible with LDB\n");
return ret;
}
return 0;
}
static krb5_error_code hdb_samba4_close(krb5_context context, HDB *db)
{
return 0;
}
static krb5_error_code hdb_samba4_lock(krb5_context context, HDB *db, int operation)
{
return 0;
}
static krb5_error_code hdb_samba4_unlock(krb5_context context, HDB *db)
{
return 0;
}
static krb5_error_code hdb_samba4_rename(krb5_context context, HDB *db, const char *new_name)
{
return HDB_ERR_DB_INUSE;
}
static krb5_error_code hdb_samba4_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return HDB_ERR_DB_INUSE;
}
static krb5_error_code hdb_samba4_remove(krb5_context context, HDB *db, krb5_const_principal principal)
{
return HDB_ERR_DB_INUSE;
}
static krb5_error_code hdb_samba4_fetch_kvno(krb5_context context, HDB *db,
krb5_const_principal principal,
unsigned flags,
krb5_kvno kvno,
hdb_entry_ex *entry_ex)
{
struct samba_kdc_db_context *kdc_db_ctx;
struct sdb_entry_ex sdb_entry_ex = {};
krb5_error_code code, ret;
kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
ret = samba_kdc_fetch(context,
kdc_db_ctx,
principal,
flags,
kvno,
&sdb_entry_ex);
switch (ret) {
case 0:
code = 0;
break;
case SDB_ERR_WRONG_REALM:
/*
* If SDB_ERR_WRONG_REALM is returned we need to process the
* sdb_entry to fill the principal in the HDB entry.
*/
code = HDB_ERR_WRONG_REALM;
break;
case SDB_ERR_NOENTRY:
return HDB_ERR_NOENTRY;
default:
return HDB_ERR_NOT_FOUND_HERE;
}
ret = sdb_entry_ex_to_hdb_entry_ex(context, &sdb_entry_ex, entry_ex);
sdb_free_entry(&sdb_entry_ex);
if (code != 0 && ret != 0) {
code = ret;
}
return code;
}
static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
hdb_entry_ex *entry)
{
struct samba_kdc_db_context *kdc_db_ctx;
struct sdb_entry_ex sdb_entry_ex = {};
krb5_error_code ret;
kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
ret = samba_kdc_firstkey(context, kdc_db_ctx, &sdb_entry_ex);
switch (ret) {
case 0:
break;
case SDB_ERR_WRONG_REALM:
return HDB_ERR_WRONG_REALM;
case SDB_ERR_NOENTRY:
return HDB_ERR_NOENTRY;
default:
return HDB_ERR_NOT_FOUND_HERE;
}
ret = sdb_entry_ex_to_hdb_entry_ex(context, &sdb_entry_ex, entry);
sdb_free_entry(&sdb_entry_ex);
return ret;
}
static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
hdb_entry_ex *entry)
{
struct samba_kdc_db_context *kdc_db_ctx;
struct sdb_entry_ex sdb_entry_ex = {};
krb5_error_code ret;
kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
ret = samba_kdc_nextkey(context, kdc_db_ctx, &sdb_entry_ex);
switch (ret) {
case 0:
break;
case SDB_ERR_WRONG_REALM:
return HDB_ERR_WRONG_REALM;
case SDB_ERR_NOENTRY:
return HDB_ERR_NOENTRY;
default:
return HDB_ERR_NOT_FOUND_HERE;
}
ret = sdb_entry_ex_to_hdb_entry_ex(context, &sdb_entry_ex, entry);
sdb_free_entry(&sdb_entry_ex);
return ret;
}
static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
{
talloc_free(db);
return 0;
}
static krb5_error_code
hdb_samba4_check_constrained_delegation(krb5_context context, HDB *db,
hdb_entry_ex *entry,
krb5_const_principal target_principal)
{
struct samba_kdc_db_context *kdc_db_ctx;
struct samba_kdc_entry *skdc_entry;
krb5_error_code ret;
kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
skdc_entry = talloc_get_type_abort(entry->ctx,
struct samba_kdc_entry);
ret = samba_kdc_check_s4u2proxy(context, kdc_db_ctx,
skdc_entry,
target_principal);
switch (ret) {
case 0:
break;
case SDB_ERR_WRONG_REALM:
ret = HDB_ERR_WRONG_REALM;
break;
case SDB_ERR_NOENTRY:
ret = HDB_ERR_NOENTRY;
break;
default:
ret = HDB_ERR_NOT_FOUND_HERE;
break;
}
return ret;
}
static krb5_error_code
hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
hdb_entry_ex *entry,
krb5_const_principal certificate_principal)
{
struct samba_kdc_db_context *kdc_db_ctx;
struct samba_kdc_entry *skdc_entry;
krb5_error_code ret;
kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
skdc_entry = talloc_get_type_abort(entry->ctx,
struct samba_kdc_entry);
ret = samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
skdc_entry,
certificate_principal);
switch (ret) {
case 0:
break;
case SDB_ERR_WRONG_REALM:
ret = HDB_ERR_WRONG_REALM;
break;
case SDB_ERR_NOENTRY:
ret = HDB_ERR_NOENTRY;
break;
default:
ret = HDB_ERR_NOT_FOUND_HERE;
break;
}
return ret;
}
static krb5_error_code
hdb_samba4_check_s4u2self(krb5_context context, HDB *db,
hdb_entry_ex *entry,
krb5_const_principal target_principal)
{
struct samba_kdc_db_context *kdc_db_ctx;
struct samba_kdc_entry *skdc_entry;
krb5_error_code ret;
kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
skdc_entry = talloc_get_type_abort(entry->ctx,
struct samba_kdc_entry);
ret = samba_kdc_check_s4u2self(context, kdc_db_ctx,
skdc_entry,
target_principal);
switch (ret) {
case 0:
break;
case SDB_ERR_WRONG_REALM:
ret = HDB_ERR_WRONG_REALM;
break;
case SDB_ERR_NOENTRY:
ret = HDB_ERR_NOENTRY;
break;
default:
ret = HDB_ERR_NOT_FOUND_HERE;
break;
}
return ret;
}
static krb5_error_code hdb_samba4_auth_status(krb5_context context, HDB *db,
hdb_entry_ex *entry,
struct sockaddr *from_addr,
const char *original_client_name,
const char *auth_type,
int hdb_auth_status)
{
struct samba_kdc_db_context *kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
struct samba_kdc_db_context);
struct ldb_dn *domain_dn = ldb_get_default_basedn(kdc_db_ctx->samdb);
/*
* Forcing this via the NTLM auth structure is not ideal, but
* it is the most practical option right now, and ensures the
* logs are consistent, even if some elements are always NULL.
*/
struct auth_usersupplied_info ui = {
.mapped_state = true,
.was_mapped = true,
.client = {
.account_name = original_client_name,
.domain_name = NULL,
},
.service_description = "Kerberos KDC",
.auth_description = "ENC-TS Pre-authentication",
.password_type = auth_type
};
size_t sa_socklen = 0;
switch (from_addr->sa_family) {
case AF_INET:
sa_socklen = sizeof(struct sockaddr_in);
break;
#ifdef HAVE_IPV6
case AF_INET6:
sa_socklen = sizeof(struct sockaddr_in6);
break;
#endif
}
switch (hdb_auth_status) {
case HDB_AUTHZ_SUCCESS:
{
struct samba_kdc_entry *p = talloc_get_type(entry->ctx,
struct samba_kdc_entry);
/*
* TODO: We could log the AS-REQ authorization success here as
* well. However before we do that, we need to pass
* in the PAC here or re-calculate it.
*/
authsam_logon_success_accounting(kdc_db_ctx->samdb, p->msg,
domain_dn, true);
break;
}
case HDB_AUTH_INVALID_SIGNATURE:
break;
case HDB_AUTH_CORRECT_PASSWORD:
case HDB_AUTH_WRONG_PASSWORD:
{
TALLOC_CTX *frame = talloc_stackframe();
struct samba_kdc_entry *p = talloc_get_type(entry->ctx,
struct samba_kdc_entry);
struct dom_sid *sid
= samdb_result_dom_sid(frame, p->msg, "objectSid");
const char *account_name
= ldb_msg_find_attr_as_string(p->msg, "sAMAccountName", NULL);
const char *domain_name = lpcfg_sam_name(p->kdc_db_ctx->lp_ctx);
struct tsocket_address *remote_host;
NTSTATUS status;
int ret;
if (hdb_auth_status == HDB_AUTH_WRONG_PASSWORD) {
authsam_update_bad_pwd_count(kdc_db_ctx->samdb, p->msg, domain_dn);
status = NT_STATUS_WRONG_PASSWORD;
} else {
status = NT_STATUS_OK;
}
ret = tsocket_address_bsd_from_sockaddr(frame, from_addr,
sa_socklen,
&remote_host);
if (ret != 0) {
ui.remote_host = NULL;
} else {
ui.remote_host = remote_host;
}
ui.mapped.account_name = account_name;
ui.mapped.domain_name = domain_name;
log_authentication_event(kdc_db_ctx->msg_ctx,
kdc_db_ctx->lp_ctx,
&ui,
status,
domain_name,
account_name,
NULL,
sid);
TALLOC_FREE(frame);
break;
}
case HDB_AUTH_CLIENT_UNKNOWN:
{
struct tsocket_address *remote_host;
int ret;
TALLOC_CTX *frame = talloc_stackframe();
ret = tsocket_address_bsd_from_sockaddr(frame, from_addr,
sa_socklen,
&remote_host);
if (ret != 0) {
ui.remote_host = NULL;
} else {
ui.remote_host = remote_host;
}
log_authentication_event(kdc_db_ctx->msg_ctx,
kdc_db_ctx->lp_ctx,
&ui,
NT_STATUS_NO_SUCH_USER,
NULL, NULL,
NULL, NULL);
TALLOC_FREE(frame);
break;
}
}
return 0;
}
/* This interface is to be called by the KDC and libnet_keytab_dump,
* which is expecting Samba calling conventions.
* It is also called by a wrapper (hdb_samba4_create) from the
* kpasswdd -> krb5 -> keytab_hdb -> hdb code */
NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
krb5_context context, struct HDB **db)
{
struct samba_kdc_db_context *kdc_db_ctx;
NTSTATUS nt_status;
if (hdb_interface_version != HDB_INTERFACE_VERSION) {
krb5_set_error_message(context, EINVAL, "Heimdal HDB interface version mismatch between build-time and run-time libraries!");
return NT_STATUS_ERROR_DS_INCOMPATIBLE_VERSION;
}
*db = talloc(base_ctx, HDB);
if (!*db) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return NT_STATUS_NO_MEMORY;
}
(*db)->hdb_master_key_set = 0;
(*db)->hdb_db = NULL;
(*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(*db);
return nt_status;
}
(*db)->hdb_db = kdc_db_ctx;
(*db)->hdb_dbc = NULL;
(*db)->hdb_open = hdb_samba4_open;
(*db)->hdb_close = hdb_samba4_close;
(*db)->hdb_fetch_kvno = hdb_samba4_fetch_kvno;
(*db)->hdb_store = hdb_samba4_store;
(*db)->hdb_remove = hdb_samba4_remove;
(*db)->hdb_firstkey = hdb_samba4_firstkey;
(*db)->hdb_nextkey = hdb_samba4_nextkey;
(*db)->hdb_lock = hdb_samba4_lock;
(*db)->hdb_unlock = hdb_samba4_unlock;
(*db)->hdb_rename = hdb_samba4_rename;
/* we don't implement these, as we are not a lockable database */
(*db)->hdb__get = NULL;
(*db)->hdb__put = NULL;
/* kadmin should not be used for deletes - use other tools instead */
(*db)->hdb__del = NULL;
(*db)->hdb_destroy = hdb_samba4_destroy;
(*db)->hdb_auth_status = hdb_samba4_auth_status;
(*db)->hdb_check_constrained_delegation = hdb_samba4_check_constrained_delegation;
(*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
(*db)->hdb_check_s4u2self = hdb_samba4_check_s4u2self;
return NT_STATUS_OK;
}