KDC Server startup
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2008
Copyright (C) Andrew Tridgell 2005
Copyright (C) Stefan Metzmacher 2005
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/process_model.h"
#include "lib/events/events.h"
#include "lib/socket/socket.h"
-#include "kdc/kdc.h"
#include "system/network.h"
-#include "lib/util/dlinklist.h"
+#include "../lib/util/dlinklist.h"
#include "lib/messaging/irpc.h"
#include "lib/stream/packet.h"
#include "librpc/gen_ndr/samr.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
+#include "librpc/gen_ndr/ndr_krb5pac.h"
#include "lib/socket/netif.h"
-#include "heimdal/kdc/windc_plugin.h"
-#include "heimdal/lib/krb5/krb5_locl.h"
-#include "heimdal/kdc/kdc_locl.h"
+#include "param/param.h"
+#include "kdc/kdc.h"
+#include "librpc/gen_ndr/ndr_misc.h"
-/* Disgusting hack to get a mem_ctx into the hdb plugin, when used as a keytab */
+/* Disgusting hack to get a mem_ctx and lp_ctx into the hdb plugin, when
+ * used as a keytab */
TALLOC_CTX *kdc_mem_ctx;
+struct loadparm_context *kdc_lp_ctx;
/* hold all the info needed to send a reply */
struct kdc_reply {
DATA_BLOB packet;
};
-typedef BOOL (*kdc_process_fn_t)(struct kdc_server *kdc,
+typedef bool (*kdc_process_fn_t)(struct kdc_server *kdc,
TALLOC_CTX *mem_ctx,
DATA_BLOB *input,
DATA_BLOB *reply,
calling conventions
*/
-static BOOL kdc_process(struct kdc_server *kdc,
+static bool kdc_process(struct kdc_server *kdc,
TALLOC_CTX *mem_ctx,
DATA_BLOB *input,
DATA_BLOB *reply,
krb5_data k5_reply;
krb5_data_zero(&k5_reply);
+ krb5_kdc_update_time(NULL);
+
DEBUG(10,("Received KDC packet of length %lu from %s:%d\n",
(long)input->length - 4, peer_addr->addr, peer_addr->port));
datagram_reply);
if (ret == -1) {
*reply = data_blob(NULL, 0);
- return False;
+ return false;
}
if (k5_reply.length) {
*reply = data_blob_talloc(mem_ctx, k5_reply.data, k5_reply.length);
} else {
*reply = data_blob(NULL, 0);
}
- return True;
+ return true;
}
/*
/*
start listening on the given address
*/
-static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address)
+static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address,
+ uint16_t kdc_port, uint16_t kpasswd_port)
{
const struct model_ops *model_ops;
struct kdc_socket *kdc_socket;
struct kdc_socket *kpasswd_socket;
struct socket_address *kdc_address, *kpasswd_address;
NTSTATUS status;
- uint16_t kdc_port = lp_krb5_port();
- uint16_t kpasswd_port = lp_kpasswd_port();
kdc_socket = talloc(kdc, struct kdc_socket);
NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
/* within the kdc task we want to be a single process, so
ask for the single process model ops and pass these to the
stream_setup_socket() call. */
- model_ops = process_model_byname("single");
+ model_ops = process_model_startup(kdc->task->event_ctx, "single");
if (!model_ops) {
DEBUG(0,("Can't find 'single' process model_ops\n"));
talloc_free(kdc_socket);
return NT_STATUS_INTERNAL_ERROR;
}
- status = stream_setup_socket(kdc->task->event_ctx, model_ops,
+ status = stream_setup_socket(kdc->task->event_ctx,
+ kdc->task->lp_ctx,
+ model_ops,
&kdc_tcp_stream_ops,
- "ip", address, &kdc_port, kdc);
+ "ip", address, &kdc_port,
+ lp_socket_options(kdc->task->lp_ctx),
+ kdc);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
address, kdc_port, nt_errstr(status)));
return status;
}
- status = stream_setup_socket(kdc->task->event_ctx, model_ops,
+ status = stream_setup_socket(kdc->task->event_ctx,
+ kdc->task->lp_ctx,
+ model_ops,
&kpasswdd_tcp_stream_ops,
- "ip", address, &kpasswd_port, kdc);
+ "ip", address, &kpasswd_port,
+ lp_socket_options(kdc->task->lp_ctx),
+ kdc);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
address, kpasswd_port, nt_errstr(status)));
/*
setup our listening sockets on the configured network interfaces
*/
-static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc)
+static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc, struct loadparm_context *lp_ctx,
+ struct interface *ifaces)
{
- int num_interfaces = iface_count();
+ int num_interfaces;
TALLOC_CTX *tmp_ctx = talloc_new(kdc);
NTSTATUS status;
-
int i;
+
+ num_interfaces = iface_count(ifaces);
for (i=0; i<num_interfaces; i++) {
- const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
- status = kdc_add_socket(kdc, address);
+ const char *address = talloc_strdup(tmp_ctx, iface_n_ip(ifaces, i));
+ status = kdc_add_socket(kdc, address, lp_krb5_port(lp_ctx),
+ lp_kpasswd_port(lp_ctx));
NT_STATUS_NOT_OK_RETURN(status);
}
};
+static NTSTATUS kdc_check_generic_kerberos(struct irpc_message *msg,
+ struct kdc_check_generic_kerberos *r)
+{
+ struct PAC_Validate pac_validate;
+ DATA_BLOB srv_sig;
+ struct PAC_SIGNATURE_DATA kdc_sig;
+ struct kdc_server *kdc = talloc_get_type(msg->private, struct kdc_server);
+ enum ndr_err_code ndr_err;
+ krb5_enctype etype;
+ int ret;
+ hdb_entry_ex ent;
+ krb5_principal principal;
+ krb5_keyblock keyblock;
+ Key *key;
+
+ /* There is no reply to this request */
+ r->out.generic_reply = data_blob(NULL, 0);
+
+ ndr_err = ndr_pull_struct_blob(&r->in.generic_request, msg,
+ lp_iconv_convenience(kdc->task->lp_ctx),
+ &pac_validate,
+ (ndr_pull_flags_fn_t)ndr_pull_PAC_Validate);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (pac_validate.MessageType != 3) {
+ /* We don't implement any other message types - such as certificate validation - yet */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (pac_validate.ChecksumAndSignature.length != (pac_validate.ChecksumLength + pac_validate.SignatureLength)
+ || pac_validate.ChecksumAndSignature.length < pac_validate.ChecksumLength
+ || pac_validate.ChecksumAndSignature.length < pac_validate.SignatureLength ) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ srv_sig = data_blob_const(pac_validate.ChecksumAndSignature.data,
+ pac_validate.ChecksumLength);
+
+ if (pac_validate.SignatureType == CKSUMTYPE_HMAC_MD5) {
+ etype = ETYPE_ARCFOUR_HMAC_MD5;
+ } else {
+ ret = krb5_cksumtype_to_enctype(kdc->smb_krb5_context->krb5_context, pac_validate.SignatureType,
+ &etype);
+ if (ret != 0) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+ }
+
+ ret = krb5_make_principal(kdc->smb_krb5_context->krb5_context, &principal,
+ lp_realm(kdc->task->lp_ctx),
+ "krbtgt", lp_realm(kdc->task->lp_ctx),
+ NULL);
+
+ if (ret != 0) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ret = kdc->config->db[0]->hdb_fetch(kdc->smb_krb5_context->krb5_context,
+ kdc->config->db[0],
+ principal,
+ HDB_F_GET_KRBTGT | HDB_F_DECRYPT,
+ &ent);
+
+ if (ret != 0) {
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
+
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ ret = hdb_enctype2key(kdc->smb_krb5_context->krb5_context, &ent.entry, etype, &key);
+
+ if (ret != 0) {
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ keyblock = key->key;
+
+ kdc_sig.type = pac_validate.SignatureType;
+ kdc_sig.signature = data_blob_const(&pac_validate.ChecksumAndSignature.data[pac_validate.ChecksumLength],
+ pac_validate.SignatureLength);
+ ret = check_pac_checksum(msg, srv_sig, &kdc_sig,
+ kdc->smb_krb5_context->krb5_context, &keyblock);
+
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
+
+ if (ret != 0) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+static struct hdb_method hdb_samba4 = {
+ .interface_version = HDB_INTERFACE_VERSION,
+ .prefix = "samba4:",
+ .create = hdb_samba4_create
+};
+
/*
startup the kdc task
*/
struct kdc_server *kdc;
NTSTATUS status;
krb5_error_code ret;
+ struct interface *ifaces;
- switch (lp_server_role()) {
+ switch (lp_server_role(task->lp_ctx)) {
case ROLE_STANDALONE:
task_server_terminate(task, "kdc: no KDC required in standalone configuration");
return;
break;
}
- if (iface_count() == 0) {
+ load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
+
+ if (iface_count(ifaces) == 0) {
task_server_terminate(task, "kdc: no network interfaces configured");
return;
}
initialize_krb5_error_table();
- ret = smb_krb5_init_context(kdc, &kdc->smb_krb5_context);
+ ret = smb_krb5_init_context(kdc, task->event_ctx, task->lp_ctx, &kdc->smb_krb5_context);
if (ret) {
DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
error_message(ret)));
krb5_add_et_list(kdc->smb_krb5_context->krb5_context, initialize_hdb_error_table_r);
- /* Registar WinDC hooks */
- ret = _krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
- PLUGIN_TYPE_DATA, "windc",
- &windc_plugin_table);
+ ret = krb5_kdc_get_config(kdc->smb_krb5_context->krb5_context,
+ &kdc->config);
if(ret) {
- task_server_terminate(task, "kdc: failed to register hdb keytab");
- return;
- }
-
- /* Setup the KDC configuration */
- kdc->config = talloc(kdc, krb5_kdc_configuration);
- if (!kdc->config) {
- task_server_terminate(task, "kdc: out of memory");
+ task_server_terminate(task, "kdc: failed to get KDC configuration");
return;
}
- krb5_kdc_default_config(kdc->config);
kdc->config->logf = kdc->smb_krb5_context->logf;
- kdc->config->db = talloc(kdc->config, struct HDB *);
+ kdc->config->db = talloc(kdc, struct HDB *);
if (!kdc->config->db) {
task_server_terminate(task, "kdc: out of memory");
return;
}
kdc->config->num_db = 1;
- status = kdc_hdb_ldb_create(kdc, kdc->smb_krb5_context->krb5_context,
+ status = kdc_hdb_samba4_create(kdc, task->event_ctx, task->lp_ctx,
+ kdc->smb_krb5_context->krb5_context,
&kdc->config->db[0], NULL);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "kdc: hdb_ldb_create (setup KDC database) failed");
return;
}
+
+ /* Register hdb-samba4 hooks */
+ ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
+ PLUGIN_TYPE_DATA, "hdb",
+ &hdb_samba4);
+ if(ret) {
+ task_server_terminate(task, "kdc: failed to register hdb keytab");
+ return;
+ }
+
ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_kt_ops);
if(ret) {
task_server_terminate(task, "kdc: failed to register hdb keytab");
return;
}
- krb5_kdc_configure(kdc->smb_krb5_context->krb5_context, kdc->config);
+ /* Registar WinDC hooks */
+ ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
+ PLUGIN_TYPE_DATA, "windc",
+ &windc_plugin_table);
+ if(ret) {
+ task_server_terminate(task, "kdc: failed to register hdb keytab");
+ return;
+ }
+
+ krb5_kdc_windc_init(kdc->smb_krb5_context->krb5_context);
kdc_mem_ctx = kdc->smb_krb5_context;
+ kdc_lp_ctx = task->lp_ctx;
/* start listening on the configured network interfaces */
- status = kdc_startup_interfaces(kdc);
+ status = kdc_startup_interfaces(kdc, task->lp_ctx, ifaces);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "kdc failed to setup interfaces");
return;
}
+ status = IRPC_REGISTER(task->msg_ctx, irpc, KDC_CHECK_GENERIC_KERBEROS,
+ kdc_check_generic_kerberos, kdc);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "nbtd failed to setup monitoring");
+ return;
+ }
+
irpc_add_name(task->msg_ctx, "kdc_server");
}
-/*
- called on startup of the KDC service
-*/
-static NTSTATUS kdc_init(struct event_context *event_ctx,
- const struct model_ops *model_ops)
-{
- return task_server_startup(event_ctx, model_ops, kdc_task_init);
-}
-
/* called at smbd startup - register ourselves as a server service */
NTSTATUS server_service_kdc_init(void)
{
- return register_server_service("kdc", kdc_init);
+ return register_server_service("kdc", kdc_task_init);
}
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