2 Unix SMB/CIFS implementation.
4 Kerberos backend for GENSEC
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
7 Copyright (C) Stefan Metzmacher <metze@samba.org> 2004-2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "lib/events/events.h"
26 #include "system/kerberos.h"
27 #include "system/gssapi.h"
28 #include "auth/kerberos/kerberos.h"
29 #include "librpc/gen_ndr/krb5pac.h"
30 #include "auth/auth.h"
32 #include "auth/auth_sam.h"
33 #include "librpc/gen_ndr/dcerpc.h"
34 #include "auth/credentials/credentials.h"
35 #include "auth/credentials/credentials_krb5.h"
36 #include "auth/gensec/gensec.h"
37 #include "auth/gensec/gensec_internal.h"
38 #include "auth/gensec/gensec_proto.h"
39 #include "auth/gensec/gensec_toplevel_proto.h"
40 #include "param/param.h"
41 #include "auth/session_proto.h"
42 #include "gensec_gssapi.h"
43 #include "lib/util/util_net.h"
44 #include "auth/kerberos/pac_utils.h"
46 #ifndef gss_mech_spnego
47 gss_OID_desc spnego_mech_oid_desc
=
48 { 6, discard_const_p(void, "\x2b\x06\x01\x05\x05\x02") };
49 #define gss_mech_spnego (&spnego_mech_oid_desc)
52 _PUBLIC_ NTSTATUS
gensec_gssapi_init(void);
54 static size_t gensec_gssapi_max_input_size(struct gensec_security
*gensec_security
);
55 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security
*gensec_security
);
57 static int gensec_gssapi_destructor(struct gensec_gssapi_state
*gensec_gssapi_state
)
59 OM_uint32 maj_stat
, min_stat
;
61 if (gensec_gssapi_state
->delegated_cred_handle
!= GSS_C_NO_CREDENTIAL
) {
62 maj_stat
= gss_release_cred(&min_stat
,
63 &gensec_gssapi_state
->delegated_cred_handle
);
66 if (gensec_gssapi_state
->gssapi_context
!= GSS_C_NO_CONTEXT
) {
67 maj_stat
= gss_delete_sec_context (&min_stat
,
68 &gensec_gssapi_state
->gssapi_context
,
72 if (gensec_gssapi_state
->server_name
!= GSS_C_NO_NAME
) {
73 maj_stat
= gss_release_name(&min_stat
, &gensec_gssapi_state
->server_name
);
75 if (gensec_gssapi_state
->client_name
!= GSS_C_NO_NAME
) {
76 maj_stat
= gss_release_name(&min_stat
, &gensec_gssapi_state
->client_name
);
79 if (gensec_gssapi_state
->lucid
) {
80 gss_krb5_free_lucid_sec_context(&min_stat
, gensec_gssapi_state
->lucid
);
86 static NTSTATUS
gensec_gssapi_init_lucid(struct gensec_gssapi_state
*gensec_gssapi_state
)
88 OM_uint32 maj_stat
, min_stat
;
90 if (gensec_gssapi_state
->lucid
) {
94 maj_stat
= gss_krb5_export_lucid_sec_context(&min_stat
,
95 &gensec_gssapi_state
->gssapi_context
,
97 (void **)&gensec_gssapi_state
->lucid
);
98 if (maj_stat
!= GSS_S_COMPLETE
) {
99 DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
100 gssapi_error_string(gensec_gssapi_state
,
102 gensec_gssapi_state
->gss_oid
)));
103 return NT_STATUS_INTERNAL_ERROR
;
106 if (gensec_gssapi_state
->lucid
->version
!= 1) {
107 DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
108 gensec_gssapi_state
->lucid
->version
));
109 gss_krb5_free_lucid_sec_context(&min_stat
, gensec_gssapi_state
->lucid
);
110 gensec_gssapi_state
->lucid
= NULL
;
111 return NT_STATUS_INTERNAL_ERROR
;
117 static NTSTATUS
gensec_gssapi_start(struct gensec_security
*gensec_security
)
119 struct gensec_gssapi_state
*gensec_gssapi_state
;
123 gensec_gssapi_state
= talloc_zero(gensec_security
, struct gensec_gssapi_state
);
124 if (!gensec_gssapi_state
) {
125 return NT_STATUS_NO_MEMORY
;
128 gensec_security
->private_data
= gensec_gssapi_state
;
130 gensec_gssapi_state
->gssapi_context
= GSS_C_NO_CONTEXT
;
132 /* TODO: Fill in channel bindings */
133 gensec_gssapi_state
->input_chan_bindings
= GSS_C_NO_CHANNEL_BINDINGS
;
135 gensec_gssapi_state
->server_name
= GSS_C_NO_NAME
;
136 gensec_gssapi_state
->client_name
= GSS_C_NO_NAME
;
138 gensec_gssapi_state
->gss_want_flags
= 0;
139 gensec_gssapi_state
->expire_time
= GENSEC_EXPIRE_TIME_INFINITY
;
141 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "delegation_by_kdc_policy", true)) {
142 gensec_gssapi_state
->gss_want_flags
|= GSS_C_DELEG_POLICY_FLAG
;
144 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "mutual", true)) {
145 gensec_gssapi_state
->gss_want_flags
|= GSS_C_MUTUAL_FLAG
;
147 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "delegation", true)) {
148 gensec_gssapi_state
->gss_want_flags
|= GSS_C_DELEG_FLAG
;
150 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "replay", true)) {
151 gensec_gssapi_state
->gss_want_flags
|= GSS_C_REPLAY_FLAG
;
153 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "sequence", true)) {
154 gensec_gssapi_state
->gss_want_flags
|= GSS_C_SEQUENCE_FLAG
;
157 if (gensec_security
->want_features
& GENSEC_FEATURE_SIGN
) {
158 gensec_gssapi_state
->gss_want_flags
|= GSS_C_INTEG_FLAG
;
160 if (gensec_security
->want_features
& GENSEC_FEATURE_SEAL
) {
161 gensec_gssapi_state
->gss_want_flags
|= GSS_C_INTEG_FLAG
;
162 gensec_gssapi_state
->gss_want_flags
|= GSS_C_CONF_FLAG
;
164 if (gensec_security
->want_features
& GENSEC_FEATURE_DCE_STYLE
) {
165 gensec_gssapi_state
->gss_want_flags
|= GSS_C_DCE_STYLE
;
168 gensec_gssapi_state
->gss_got_flags
= 0;
170 switch (gensec_security
->ops
->auth_type
) {
171 case DCERPC_AUTH_TYPE_SPNEGO
:
172 gensec_gssapi_state
->gss_oid
= gss_mech_spnego
;
174 case DCERPC_AUTH_TYPE_KRB5
:
176 gensec_gssapi_state
->gss_oid
=
177 discard_const_p(void, gss_mech_krb5
);
181 ret
= smb_krb5_init_context(gensec_gssapi_state
,
182 gensec_security
->settings
->lp_ctx
,
183 &gensec_gssapi_state
->smb_krb5_context
);
185 DEBUG(1,("gensec_gssapi_start: smb_krb5_init_context failed (%s)\n",
186 error_message(ret
)));
187 talloc_free(gensec_gssapi_state
);
188 return NT_STATUS_INTERNAL_ERROR
;
191 gensec_gssapi_state
->client_cred
= NULL
;
192 gensec_gssapi_state
->server_cred
= NULL
;
194 gensec_gssapi_state
->lucid
= NULL
;
196 gensec_gssapi_state
->delegated_cred_handle
= GSS_C_NO_CREDENTIAL
;
198 gensec_gssapi_state
->sasl
= false;
199 gensec_gssapi_state
->sasl_state
= STAGE_GSS_NEG
;
200 gensec_gssapi_state
->sasl_protection
= 0;
202 gensec_gssapi_state
->max_wrap_buf_size
203 = gensec_setting_int(gensec_security
->settings
, "gensec_gssapi", "max wrap buf size", 65536);
204 gensec_gssapi_state
->gss_exchange_count
= 0;
205 gensec_gssapi_state
->sig_size
= 0;
207 talloc_set_destructor(gensec_gssapi_state
, gensec_gssapi_destructor
);
209 #ifdef SAMBA4_USES_HEIMDAL
210 realm
= lpcfg_realm(gensec_security
->settings
->lp_ctx
);
212 ret
= gsskrb5_set_default_realm(realm
);
214 DEBUG(1,("gensec_gssapi_start: gsskrb5_set_default_realm failed\n"));
215 talloc_free(gensec_gssapi_state
);
216 return NT_STATUS_INTERNAL_ERROR
;
220 /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
221 ret
= gsskrb5_set_dns_canonicalize(gensec_setting_bool(gensec_security
->settings
, "krb5", "set_dns_canonicalize", false));
223 DEBUG(1,("gensec_gssapi_start: gsskrb5_set_dns_canonicalize failed\n"));
224 talloc_free(gensec_gssapi_state
);
225 return NT_STATUS_INTERNAL_ERROR
;
231 static NTSTATUS
gensec_gssapi_server_start(struct gensec_security
*gensec_security
)
235 struct gensec_gssapi_state
*gensec_gssapi_state
;
236 struct cli_credentials
*machine_account
;
237 struct gssapi_creds_container
*gcc
;
239 nt_status
= gensec_gssapi_start(gensec_security
);
240 if (!NT_STATUS_IS_OK(nt_status
)) {
244 gensec_gssapi_state
= talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
246 machine_account
= gensec_get_credentials(gensec_security
);
248 if (!machine_account
) {
249 DEBUG(3, ("No machine account credentials specified\n"));
250 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
252 ret
= cli_credentials_get_server_gss_creds(machine_account
,
253 gensec_security
->settings
->lp_ctx
, &gcc
);
255 DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
256 error_message(ret
)));
257 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
261 gensec_gssapi_state
->server_cred
= gcc
;
266 static NTSTATUS
gensec_gssapi_sasl_server_start(struct gensec_security
*gensec_security
)
269 struct gensec_gssapi_state
*gensec_gssapi_state
;
270 nt_status
= gensec_gssapi_server_start(gensec_security
);
272 if (NT_STATUS_IS_OK(nt_status
)) {
273 gensec_gssapi_state
= talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
274 gensec_gssapi_state
->sasl
= true;
279 static NTSTATUS
gensec_gssapi_client_creds(struct gensec_security
*gensec_security
,
280 struct tevent_context
*ev
)
282 struct gensec_gssapi_state
*gensec_gssapi_state
;
283 struct gssapi_creds_container
*gcc
;
284 struct cli_credentials
*creds
= gensec_get_credentials(gensec_security
);
285 const char *error_string
;
288 gensec_gssapi_state
= talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
290 /* Only run this the first time the update() call is made */
291 if (gensec_gssapi_state
->client_cred
) {
295 ret
= cli_credentials_get_client_gss_creds(creds
,
297 gensec_security
->settings
->lp_ctx
, &gcc
, &error_string
);
302 DEBUG(3, ("Cannot obtain client GSS credentials we need to contact %s : %s\n", gensec_gssapi_state
->target_principal
, error_string
));
303 return NT_STATUS_INVALID_PARAMETER
;
304 case KRB5KDC_ERR_PREAUTH_FAILED
:
305 case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN
:
306 DEBUG(1, ("Wrong username or password: %s\n", error_string
));
307 return NT_STATUS_LOGON_FAILURE
;
308 case KRB5KDC_ERR_CLIENT_REVOKED
:
309 DEBUG(1, ("Account locked out: %s\n", error_string
));
310 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
311 case KRB5_KDC_UNREACH
:
312 DEBUG(3, ("Cannot reach a KDC we require to contact %s : %s\n", gensec_gssapi_state
->target_principal
, error_string
));
313 return NT_STATUS_NO_LOGON_SERVERS
;
314 case KRB5_CC_NOTFOUND
:
316 DEBUG(2, ("Error obtaining ticket we require to contact %s: (possibly due to clock skew between us and the KDC) %s\n", gensec_gssapi_state
->target_principal
, error_string
));
317 return NT_STATUS_TIME_DIFFERENCE_AT_DC
;
319 DEBUG(1, ("Aquiring initiator credentials failed: %s\n", error_string
));
320 return NT_STATUS_UNSUCCESSFUL
;
323 gensec_gssapi_state
->client_cred
= gcc
;
324 if (!talloc_reference(gensec_gssapi_state
, gcc
)) {
325 return NT_STATUS_NO_MEMORY
;
331 static NTSTATUS
gensec_gssapi_client_start(struct gensec_security
*gensec_security
)
333 struct gensec_gssapi_state
*gensec_gssapi_state
;
334 struct cli_credentials
*creds
= gensec_get_credentials(gensec_security
);
336 gss_buffer_desc name_token
;
338 OM_uint32 maj_stat
, min_stat
;
339 const char *hostname
= gensec_get_target_hostname(gensec_security
);
342 DEBUG(3, ("No hostname for target computer passed in, cannot use kerberos for this connection\n"));
343 return NT_STATUS_INVALID_PARAMETER
;
345 if (is_ipaddress(hostname
)) {
346 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
347 return NT_STATUS_INVALID_PARAMETER
;
349 if (strcmp(hostname
, "localhost") == 0) {
350 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
351 return NT_STATUS_INVALID_PARAMETER
;
354 nt_status
= gensec_gssapi_start(gensec_security
);
355 if (!NT_STATUS_IS_OK(nt_status
)) {
359 gensec_gssapi_state
= talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
361 if (cli_credentials_get_impersonate_principal(creds
)) {
362 gensec_gssapi_state
->gss_want_flags
&= ~(GSS_C_DELEG_FLAG
|GSS_C_DELEG_POLICY_FLAG
);
365 gensec_gssapi_state
->target_principal
= gensec_get_target_principal(gensec_security
);
366 if (gensec_gssapi_state
->target_principal
) {
367 name_type
= GSS_C_NULL_OID
;
369 gensec_gssapi_state
->target_principal
= talloc_asprintf(gensec_gssapi_state
, "%s/%s@%s",
370 gensec_get_target_service(gensec_security
),
371 hostname
, lpcfg_realm(gensec_security
->settings
->lp_ctx
));
373 name_type
= GSS_C_NT_USER_NAME
;
375 name_token
.value
= discard_const_p(uint8_t, gensec_gssapi_state
->target_principal
);
376 name_token
.length
= strlen(gensec_gssapi_state
->target_principal
);
379 maj_stat
= gss_import_name (&min_stat
,
382 &gensec_gssapi_state
->server_name
);
384 DEBUG(2, ("GSS Import name of %s failed: %s\n",
385 (char *)name_token
.value
,
386 gssapi_error_string(gensec_gssapi_state
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
387 return NT_STATUS_INVALID_PARAMETER
;
393 static NTSTATUS
gensec_gssapi_sasl_client_start(struct gensec_security
*gensec_security
)
396 struct gensec_gssapi_state
*gensec_gssapi_state
;
397 nt_status
= gensec_gssapi_client_start(gensec_security
);
399 if (NT_STATUS_IS_OK(nt_status
)) {
400 gensec_gssapi_state
= talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
401 gensec_gssapi_state
->sasl
= true;
408 * Next state function for the GSSAPI GENSEC mechanism
410 * @param gensec_gssapi_state GSSAPI State
411 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
412 * @param in The request, as a DATA_BLOB
413 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
414 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
415 * or NT_STATUS_OK if the user is authenticated.
418 static NTSTATUS
gensec_gssapi_update(struct gensec_security
*gensec_security
,
419 TALLOC_CTX
*out_mem_ctx
,
420 struct tevent_context
*ev
,
421 const DATA_BLOB in
, DATA_BLOB
*out
)
423 struct gensec_gssapi_state
*gensec_gssapi_state
424 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
425 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
426 OM_uint32 maj_stat
, min_stat
;
428 gss_buffer_desc input_token
= { 0, NULL
};
429 gss_buffer_desc output_token
= { 0, NULL
};
431 gss_OID gss_oid_p
= NULL
;
432 OM_uint32 time_req
= 0;
433 OM_uint32 time_rec
= 0;
436 time_req
= gensec_setting_int(gensec_security
->settings
,
437 "gensec_gssapi", "requested_life_time",
440 input_token
.length
= in
.length
;
441 input_token
.value
= in
.data
;
443 switch (gensec_gssapi_state
->sasl_state
) {
446 switch (gensec_security
->gensec_role
) {
449 #ifdef SAMBA4_USES_HEIMDAL
450 struct gsskrb5_send_to_kdc send_to_kdc
;
454 nt_status
= gensec_gssapi_client_creds(gensec_security
, ev
);
455 if (!NT_STATUS_IS_OK(nt_status
)) {
459 #ifdef SAMBA4_USES_HEIMDAL
460 send_to_kdc
.func
= smb_krb5_send_and_recv_func
;
461 send_to_kdc
.ptr
= ev
;
463 min_stat
= gsskrb5_set_send_to_kdc(&send_to_kdc
);
465 DEBUG(1,("gensec_gssapi_update: gsskrb5_set_send_to_kdc failed\n"));
466 return NT_STATUS_INTERNAL_ERROR
;
469 maj_stat
= gss_init_sec_context(&min_stat
,
470 gensec_gssapi_state
->client_cred
->creds
,
471 &gensec_gssapi_state
->gssapi_context
,
472 gensec_gssapi_state
->server_name
,
473 gensec_gssapi_state
->gss_oid
,
474 gensec_gssapi_state
->gss_want_flags
,
476 gensec_gssapi_state
->input_chan_bindings
,
480 &gensec_gssapi_state
->gss_got_flags
, /* ret flags */
483 gensec_gssapi_state
->gss_oid
= gss_oid_p
;
486 #ifdef SAMBA4_USES_HEIMDAL
487 send_to_kdc
.func
= smb_krb5_send_and_recv_func
;
488 send_to_kdc
.ptr
= NULL
;
490 ret
= gsskrb5_set_send_to_kdc(&send_to_kdc
);
492 DEBUG(1,("gensec_gssapi_update: gsskrb5_set_send_to_kdc failed\n"));
493 return NT_STATUS_INTERNAL_ERROR
;
500 maj_stat
= gss_accept_sec_context(&min_stat
,
501 &gensec_gssapi_state
->gssapi_context
,
502 gensec_gssapi_state
->server_cred
->creds
,
504 gensec_gssapi_state
->input_chan_bindings
,
505 &gensec_gssapi_state
->client_name
,
508 &gensec_gssapi_state
->gss_got_flags
,
510 &gensec_gssapi_state
->delegated_cred_handle
);
512 gensec_gssapi_state
->gss_oid
= gss_oid_p
;
517 return NT_STATUS_INVALID_PARAMETER
;
521 gensec_gssapi_state
->gss_exchange_count
++;
523 if (maj_stat
== GSS_S_COMPLETE
) {
524 *out
= data_blob_talloc(out_mem_ctx
, output_token
.value
, output_token
.length
);
525 gss_release_buffer(&min_stat2
, &output_token
);
527 if (gensec_gssapi_state
->gss_got_flags
& GSS_C_DELEG_FLAG
) {
528 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
530 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
533 tv
= timeval_current_ofs(time_rec
, 0);
534 gensec_gssapi_state
->expire_time
= timeval_to_nttime(&tv
);
536 /* We may have been invoked as SASL, so there
537 * is more work to do */
538 if (gensec_gssapi_state
->sasl
) {
539 gensec_gssapi_state
->sasl_state
= STAGE_SASL_SSF_NEG
;
540 return NT_STATUS_MORE_PROCESSING_REQUIRED
;
542 gensec_gssapi_state
->sasl_state
= STAGE_DONE
;
544 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
545 DEBUG(5, ("GSSAPI Connection will be cryptographically sealed\n"));
546 } else if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SIGN
)) {
547 DEBUG(5, ("GSSAPI Connection will be cryptographically signed\n"));
549 DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
554 } else if (maj_stat
== GSS_S_CONTINUE_NEEDED
) {
555 *out
= data_blob_talloc(out_mem_ctx
, output_token
.value
, output_token
.length
);
556 gss_release_buffer(&min_stat2
, &output_token
);
558 return NT_STATUS_MORE_PROCESSING_REQUIRED
;
559 } else if (maj_stat
== GSS_S_CONTEXT_EXPIRED
) {
562 gss_buffer_desc buffer
;
563 OM_uint32 lifetime
= 0;
564 gss_cred_usage_t usage
;
565 const char *role
= NULL
;
566 DEBUG(0, ("GSS %s Update(krb5)(%d) Update failed, credentials expired during GSSAPI handshake!\n",
568 gensec_gssapi_state
->gss_exchange_count
));
571 switch (gensec_security
->gensec_role
) {
573 creds
= gensec_gssapi_state
->client_cred
->creds
;
577 creds
= gensec_gssapi_state
->server_cred
->creds
;
582 maj_stat
= gss_inquire_cred(&min_stat
,
584 &name
, &lifetime
, &usage
, NULL
);
586 if (maj_stat
== GSS_S_COMPLETE
) {
587 const char *usage_string
;
590 usage_string
= "GSS_C_BOTH";
593 usage_string
= "GSS_C_ACCEPT";
596 usage_string
= "GSS_C_INITIATE";
599 maj_stat
= gss_display_name(&min_stat
, name
, &buffer
, NULL
);
605 DEBUG(0, ("GSSAPI gss_inquire_cred indicates expiry of %*.*s in %u sec for %s\n",
606 (int)buffer
.length
, (int)buffer
.length
, (char *)buffer
.value
,
607 lifetime
, usage_string
));
609 DEBUG(0, ("GSSAPI gss_inquire_cred indicates %*.*s has already expired for %s\n",
610 (int)buffer
.length
, (int)buffer
.length
, (char *)buffer
.value
,
613 gss_release_buffer(&min_stat
, &buffer
);
614 gss_release_name(&min_stat
, &name
);
615 } else if (maj_stat
!= GSS_S_COMPLETE
) {
616 DEBUG(0, ("inquiry of credential lifefime via GSSAPI gss_inquire_cred failed: %s\n",
617 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
619 return NT_STATUS_INVALID_PARAMETER
;
620 } else if (smb_gss_oid_equal(gensec_gssapi_state
->gss_oid
,
623 case KRB5KRB_AP_ERR_TKT_NYV
:
624 DEBUG(1, ("Error with ticket to contact %s: possible clock skew between us and the KDC or target server: %s\n",
625 gensec_gssapi_state
->target_principal
,
626 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
627 return NT_STATUS_TIME_DIFFERENCE_AT_DC
; /* Make SPNEGO ignore us, we can't go any further here */
628 case KRB5KRB_AP_ERR_TKT_EXPIRED
:
629 DEBUG(1, ("Error with ticket to contact %s: ticket is expired, possible clock skew between us and the KDC or target server: %s\n",
630 gensec_gssapi_state
->target_principal
,
631 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
632 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
633 case KRB5_KDC_UNREACH
:
634 DEBUG(3, ("Cannot reach a KDC we require in order to obtain a ticetk to %s: %s\n",
635 gensec_gssapi_state
->target_principal
,
636 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
637 return NT_STATUS_NO_LOGON_SERVERS
; /* Make SPNEGO ignore us, we can't go any further here */
638 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN
:
639 DEBUG(3, ("Server %s is not registered with our KDC: %s\n",
640 gensec_gssapi_state
->target_principal
,
641 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
642 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
643 case KRB5KRB_AP_ERR_MSG_TYPE
:
644 /* garbage input, possibly from the auto-mech detection */
645 return NT_STATUS_INVALID_PARAMETER
;
647 DEBUG(1, ("GSS %s Update(krb5)(%d) Update failed: %s\n",
648 gensec_security
->gensec_role
== GENSEC_CLIENT
? "client" : "server",
649 gensec_gssapi_state
->gss_exchange_count
,
650 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
654 DEBUG(1, ("GSS %s Update(%d) failed: %s\n",
655 gensec_security
->gensec_role
== GENSEC_CLIENT
? "client" : "server",
656 gensec_gssapi_state
->gss_exchange_count
,
657 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
663 /* These last two stages are only done if we were invoked as SASL */
664 case STAGE_SASL_SSF_NEG
:
666 switch (gensec_security
->gensec_role
) {
669 uint8_t maxlength_proposed
[4];
670 uint8_t maxlength_accepted
[4];
671 uint8_t security_supported
;
674 input_token
.length
= in
.length
;
675 input_token
.value
= in
.data
;
677 /* As a client, we have just send a
678 * zero-length blob to the server (after the
679 * normal GSSAPI exchange), and it has replied
680 * with it's SASL negotiation */
682 maj_stat
= gss_unwrap(&min_stat
,
683 gensec_gssapi_state
->gssapi_context
,
688 if (GSS_ERROR(maj_stat
)) {
689 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
690 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
691 return NT_STATUS_ACCESS_DENIED
;
694 if (output_token
.length
< 4) {
695 return NT_STATUS_INVALID_PARAMETER
;
698 memcpy(maxlength_proposed
, output_token
.value
, 4);
699 gss_release_buffer(&min_stat
, &output_token
);
701 /* first byte is the proposed security */
702 security_supported
= maxlength_proposed
[0];
703 maxlength_proposed
[0] = '\0';
705 /* Rest is the proposed max wrap length */
706 gensec_gssapi_state
->max_wrap_buf_size
= MIN(RIVAL(maxlength_proposed
, 0),
707 gensec_gssapi_state
->max_wrap_buf_size
);
708 gensec_gssapi_state
->sasl_protection
= 0;
709 if (security_supported
& NEG_SEAL
) {
710 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
711 gensec_gssapi_state
->sasl_protection
|= NEG_SEAL
;
714 if (security_supported
& NEG_SIGN
) {
715 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SIGN
)) {
716 gensec_gssapi_state
->sasl_protection
|= NEG_SIGN
;
719 if (security_supported
& NEG_NONE
) {
720 gensec_gssapi_state
->sasl_protection
|= NEG_NONE
;
722 if (gensec_gssapi_state
->sasl_protection
== 0) {
723 DEBUG(1, ("Remote server does not support unprotected connections\n"));
724 return NT_STATUS_ACCESS_DENIED
;
727 /* Send back the negotiated max length */
729 RSIVAL(maxlength_accepted
, 0, gensec_gssapi_state
->max_wrap_buf_size
);
731 maxlength_accepted
[0] = gensec_gssapi_state
->sasl_protection
;
733 input_token
.value
= maxlength_accepted
;
734 input_token
.length
= sizeof(maxlength_accepted
);
736 maj_stat
= gss_wrap(&min_stat
,
737 gensec_gssapi_state
->gssapi_context
,
743 if (GSS_ERROR(maj_stat
)) {
744 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
745 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
746 return NT_STATUS_ACCESS_DENIED
;
749 *out
= data_blob_talloc(out_mem_ctx
, output_token
.value
, output_token
.length
);
750 gss_release_buffer(&min_stat
, &output_token
);
752 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
753 gensec_gssapi_state
->sasl_state
= STAGE_DONE
;
755 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
756 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically sealed\n"));
757 } else if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SIGN
)) {
758 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographically signed\n"));
760 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographically protection\n"));
767 uint8_t maxlength_proposed
[4];
768 uint8_t security_supported
= 0x0;
771 /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
772 if (in
.length
!= 0) {
773 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
776 /* Give the client some idea what we will support */
778 RSIVAL(maxlength_proposed
, 0, gensec_gssapi_state
->max_wrap_buf_size
);
779 /* first byte is the proposed security */
780 maxlength_proposed
[0] = '\0';
782 gensec_gssapi_state
->sasl_protection
= 0;
783 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
784 security_supported
|= NEG_SEAL
;
786 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SIGN
)) {
787 security_supported
|= NEG_SIGN
;
789 if (security_supported
== 0) {
790 /* If we don't support anything, this must be 0 */
791 RSIVAL(maxlength_proposed
, 0, 0x0);
794 /* TODO: We may not wish to support this */
795 security_supported
|= NEG_NONE
;
796 maxlength_proposed
[0] = security_supported
;
798 input_token
.value
= maxlength_proposed
;
799 input_token
.length
= sizeof(maxlength_proposed
);
801 maj_stat
= gss_wrap(&min_stat
,
802 gensec_gssapi_state
->gssapi_context
,
808 if (GSS_ERROR(maj_stat
)) {
809 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
810 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
811 return NT_STATUS_ACCESS_DENIED
;
814 *out
= data_blob_talloc(out_mem_ctx
, output_token
.value
, output_token
.length
);
815 gss_release_buffer(&min_stat
, &output_token
);
817 gensec_gssapi_state
->sasl_state
= STAGE_SASL_SSF_ACCEPT
;
818 return NT_STATUS_MORE_PROCESSING_REQUIRED
;
821 return NT_STATUS_INVALID_PARAMETER
;
825 /* This is s server-only stage */
826 case STAGE_SASL_SSF_ACCEPT
:
828 uint8_t maxlength_accepted
[4];
829 uint8_t security_accepted
;
832 input_token
.length
= in
.length
;
833 input_token
.value
= in
.data
;
835 maj_stat
= gss_unwrap(&min_stat
,
836 gensec_gssapi_state
->gssapi_context
,
841 if (GSS_ERROR(maj_stat
)) {
842 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
843 gssapi_error_string(out_mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
844 return NT_STATUS_ACCESS_DENIED
;
847 if (output_token
.length
< 4) {
848 return NT_STATUS_INVALID_PARAMETER
;
851 memcpy(maxlength_accepted
, output_token
.value
, 4);
852 gss_release_buffer(&min_stat
, &output_token
);
854 /* first byte is the proposed security */
855 security_accepted
= maxlength_accepted
[0];
856 maxlength_accepted
[0] = '\0';
858 /* Rest is the proposed max wrap length */
859 gensec_gssapi_state
->max_wrap_buf_size
= MIN(RIVAL(maxlength_accepted
, 0),
860 gensec_gssapi_state
->max_wrap_buf_size
);
862 gensec_gssapi_state
->sasl_protection
= 0;
863 if (security_accepted
& NEG_SEAL
) {
864 if (!gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
865 DEBUG(1, ("Remote client wanted seal, but gensec refused\n"));
866 return NT_STATUS_ACCESS_DENIED
;
868 gensec_gssapi_state
->sasl_protection
|= NEG_SEAL
;
870 if (security_accepted
& NEG_SIGN
) {
871 if (!gensec_have_feature(gensec_security
, GENSEC_FEATURE_SIGN
)) {
872 DEBUG(1, ("Remote client wanted sign, but gensec refused\n"));
873 return NT_STATUS_ACCESS_DENIED
;
875 gensec_gssapi_state
->sasl_protection
|= NEG_SIGN
;
877 if (security_accepted
& NEG_NONE
) {
878 gensec_gssapi_state
->sasl_protection
|= NEG_NONE
;
881 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
882 gensec_gssapi_state
->sasl_state
= STAGE_DONE
;
883 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
884 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically sealed\n"));
885 } else if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SIGN
)) {
886 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographically signed\n"));
888 DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
891 *out
= data_blob(NULL
, 0);
895 return NT_STATUS_INVALID_PARAMETER
;
899 static NTSTATUS
gensec_gssapi_wrap(struct gensec_security
*gensec_security
,
904 struct gensec_gssapi_state
*gensec_gssapi_state
905 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
906 OM_uint32 maj_stat
, min_stat
;
907 gss_buffer_desc input_token
, output_token
;
909 input_token
.length
= in
->length
;
910 input_token
.value
= in
->data
;
912 maj_stat
= gss_wrap(&min_stat
,
913 gensec_gssapi_state
->gssapi_context
,
914 gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
),
919 if (GSS_ERROR(maj_stat
)) {
920 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
921 gssapi_error_string(mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
922 return NT_STATUS_ACCESS_DENIED
;
925 *out
= data_blob_talloc(mem_ctx
, output_token
.value
, output_token
.length
);
926 gss_release_buffer(&min_stat
, &output_token
);
928 if (gensec_gssapi_state
->sasl
) {
929 size_t max_wrapped_size
= gensec_gssapi_max_wrapped_size(gensec_security
);
930 if (max_wrapped_size
< out
->length
) {
931 DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
932 (unsigned)in
->length
,
933 (unsigned)out
->length
,
934 (unsigned int)max_wrapped_size
));
935 return NT_STATUS_INVALID_PARAMETER
;
939 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)
941 return NT_STATUS_ACCESS_DENIED
;
946 static NTSTATUS
gensec_gssapi_unwrap(struct gensec_security
*gensec_security
,
951 struct gensec_gssapi_state
*gensec_gssapi_state
952 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
953 OM_uint32 maj_stat
, min_stat
;
954 gss_buffer_desc input_token
, output_token
;
957 input_token
.length
= in
->length
;
958 input_token
.value
= in
->data
;
960 if (gensec_gssapi_state
->sasl
) {
961 size_t max_wrapped_size
= gensec_gssapi_max_wrapped_size(gensec_security
);
962 if (max_wrapped_size
< in
->length
) {
963 DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
964 return NT_STATUS_INVALID_PARAMETER
;
968 maj_stat
= gss_unwrap(&min_stat
,
969 gensec_gssapi_state
->gssapi_context
,
974 if (GSS_ERROR(maj_stat
)) {
975 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
976 gssapi_error_string(mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
977 return NT_STATUS_ACCESS_DENIED
;
980 *out
= data_blob_talloc(mem_ctx
, output_token
.value
, output_token
.length
);
981 gss_release_buffer(&min_stat
, &output_token
);
983 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)
985 return NT_STATUS_ACCESS_DENIED
;
990 /* Find out the maximum input size negotiated on this connection */
992 static size_t gensec_gssapi_max_input_size(struct gensec_security
*gensec_security
)
994 struct gensec_gssapi_state
*gensec_gssapi_state
995 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
996 OM_uint32 maj_stat
, min_stat
;
997 OM_uint32 max_input_size
;
999 maj_stat
= gss_wrap_size_limit(&min_stat
,
1000 gensec_gssapi_state
->gssapi_context
,
1001 gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
),
1003 gensec_gssapi_state
->max_wrap_buf_size
,
1005 if (GSS_ERROR(maj_stat
)) {
1006 TALLOC_CTX
*mem_ctx
= talloc_new(NULL
);
1007 DEBUG(1, ("gensec_gssapi_max_input_size: determining signature size with gss_wrap_size_limit failed: %s\n",
1008 gssapi_error_string(mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
1009 talloc_free(mem_ctx
);
1013 return max_input_size
;
1016 /* Find out the maximum output size negotiated on this connection */
1017 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security
*gensec_security
)
1019 struct gensec_gssapi_state
*gensec_gssapi_state
= talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);;
1020 return gensec_gssapi_state
->max_wrap_buf_size
;
1023 static NTSTATUS
gensec_gssapi_seal_packet(struct gensec_security
*gensec_security
,
1024 TALLOC_CTX
*mem_ctx
,
1025 uint8_t *data
, size_t length
,
1026 const uint8_t *whole_pdu
, size_t pdu_length
,
1029 struct gensec_gssapi_state
*gensec_gssapi_state
1030 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1031 OM_uint32 maj_stat
, min_stat
;
1032 gss_buffer_desc input_token
, output_token
;
1036 if (gensec_security
->want_features
& GENSEC_FEATURE_SIGN_PKT_HEADER
) {
1037 DEBUG(1, ("gensec_gssapi_seal_packet: "
1038 "GENSEC_FEATURE_SIGN_PKT_HEADER not supported\n"));
1039 return NT_STATUS_ACCESS_DENIED
;
1042 input_token
.length
= length
;
1043 input_token
.value
= data
;
1045 maj_stat
= gss_wrap(&min_stat
,
1046 gensec_gssapi_state
->gssapi_context
,
1047 gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
),
1052 if (GSS_ERROR(maj_stat
)) {
1053 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
1054 gssapi_error_string(mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
1055 return NT_STATUS_ACCESS_DENIED
;
1058 if (output_token
.length
< input_token
.length
) {
1059 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
1060 (long)output_token
.length
, (long)length
));
1061 return NT_STATUS_INTERNAL_ERROR
;
1063 sig_length
= output_token
.length
- input_token
.length
;
1065 memcpy(data
, ((uint8_t *)output_token
.value
) + sig_length
, length
);
1066 *sig
= data_blob_talloc(mem_ctx
, (uint8_t *)output_token
.value
, sig_length
);
1068 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig
->data
, sig
->length
);
1069 dump_data_pw("gensec_gssapi_seal_packet: clear\n", data
, length
);
1070 dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token
.value
) + sig_length
, output_token
.length
- sig_length
);
1072 gss_release_buffer(&min_stat
, &output_token
);
1074 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)
1076 return NT_STATUS_ACCESS_DENIED
;
1078 return NT_STATUS_OK
;
1081 static NTSTATUS
gensec_gssapi_unseal_packet(struct gensec_security
*gensec_security
,
1082 uint8_t *data
, size_t length
,
1083 const uint8_t *whole_pdu
, size_t pdu_length
,
1084 const DATA_BLOB
*sig
)
1086 struct gensec_gssapi_state
*gensec_gssapi_state
1087 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1088 OM_uint32 maj_stat
, min_stat
;
1089 gss_buffer_desc input_token
, output_token
;
1091 gss_qop_t qop_state
;
1094 dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig
->data
, sig
->length
);
1096 if (gensec_security
->want_features
& GENSEC_FEATURE_SIGN_PKT_HEADER
) {
1097 DEBUG(1, ("gensec_gssapi_unseal_packet: "
1098 "GENSEC_FEATURE_SIGN_PKT_HEADER not supported\n"));
1099 return NT_STATUS_ACCESS_DENIED
;
1102 in
= data_blob_talloc(gensec_security
, NULL
, sig
->length
+ length
);
1104 memcpy(in
.data
, sig
->data
, sig
->length
);
1105 memcpy(in
.data
+ sig
->length
, data
, length
);
1107 input_token
.length
= in
.length
;
1108 input_token
.value
= in
.data
;
1110 maj_stat
= gss_unwrap(&min_stat
,
1111 gensec_gssapi_state
->gssapi_context
,
1116 talloc_free(in
.data
);
1117 if (GSS_ERROR(maj_stat
)) {
1118 char *error_string
= gssapi_error_string(NULL
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
);
1119 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1121 talloc_free(error_string
);
1122 return NT_STATUS_ACCESS_DENIED
;
1125 if (output_token
.length
!= length
) {
1126 return NT_STATUS_INTERNAL_ERROR
;
1129 memcpy(data
, output_token
.value
, length
);
1131 gss_release_buffer(&min_stat
, &output_token
);
1133 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)
1135 return NT_STATUS_ACCESS_DENIED
;
1137 return NT_STATUS_OK
;
1140 static NTSTATUS
gensec_gssapi_sign_packet(struct gensec_security
*gensec_security
,
1141 TALLOC_CTX
*mem_ctx
,
1142 const uint8_t *data
, size_t length
,
1143 const uint8_t *whole_pdu
, size_t pdu_length
,
1146 struct gensec_gssapi_state
*gensec_gssapi_state
1147 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1148 OM_uint32 maj_stat
, min_stat
;
1149 gss_buffer_desc input_token
, output_token
;
1151 if (gensec_security
->want_features
& GENSEC_FEATURE_SIGN_PKT_HEADER
) {
1152 input_token
.length
= pdu_length
;
1153 input_token
.value
= discard_const_p(uint8_t *, whole_pdu
);
1155 input_token
.length
= length
;
1156 input_token
.value
= discard_const_p(uint8_t *, data
);
1159 maj_stat
= gss_get_mic(&min_stat
,
1160 gensec_gssapi_state
->gssapi_context
,
1164 if (GSS_ERROR(maj_stat
)) {
1165 DEBUG(1, ("GSS GetMic failed: %s\n",
1166 gssapi_error_string(mem_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
1167 return NT_STATUS_ACCESS_DENIED
;
1170 *sig
= data_blob_talloc(mem_ctx
, (uint8_t *)output_token
.value
, output_token
.length
);
1172 dump_data_pw("gensec_gssapi_sign_packet: sig\n", sig
->data
, sig
->length
);
1174 gss_release_buffer(&min_stat
, &output_token
);
1176 return NT_STATUS_OK
;
1179 static NTSTATUS
gensec_gssapi_check_packet(struct gensec_security
*gensec_security
,
1180 const uint8_t *data
, size_t length
,
1181 const uint8_t *whole_pdu
, size_t pdu_length
,
1182 const DATA_BLOB
*sig
)
1184 struct gensec_gssapi_state
*gensec_gssapi_state
1185 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1186 OM_uint32 maj_stat
, min_stat
;
1187 gss_buffer_desc input_token
;
1188 gss_buffer_desc input_message
;
1189 gss_qop_t qop_state
;
1191 dump_data_pw("gensec_gssapi_check_packet: sig\n", sig
->data
, sig
->length
);
1193 if (gensec_security
->want_features
& GENSEC_FEATURE_SIGN_PKT_HEADER
) {
1194 input_message
.length
= pdu_length
;
1195 input_message
.value
= discard_const(whole_pdu
);
1197 input_message
.length
= length
;
1198 input_message
.value
= discard_const(data
);
1201 input_token
.length
= sig
->length
;
1202 input_token
.value
= sig
->data
;
1204 maj_stat
= gss_verify_mic(&min_stat
,
1205 gensec_gssapi_state
->gssapi_context
,
1209 if (GSS_ERROR(maj_stat
)) {
1210 char *error_string
= gssapi_error_string(NULL
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
);
1211 DEBUG(1, ("GSS VerifyMic failed: %s\n", error_string
));
1212 talloc_free(error_string
);
1214 return NT_STATUS_ACCESS_DENIED
;
1217 return NT_STATUS_OK
;
1220 /* Try to figure out what features we actually got on the connection */
1221 static bool gensec_gssapi_have_feature(struct gensec_security
*gensec_security
,
1224 struct gensec_gssapi_state
*gensec_gssapi_state
1225 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1226 if (feature
& GENSEC_FEATURE_SIGN
) {
1227 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1228 if (gensec_gssapi_state
->sasl
1229 && gensec_gssapi_state
->sasl_state
== STAGE_DONE
) {
1230 return ((gensec_gssapi_state
->sasl_protection
& NEG_SIGN
)
1231 && (gensec_gssapi_state
->gss_got_flags
& GSS_C_INTEG_FLAG
));
1233 return gensec_gssapi_state
->gss_got_flags
& GSS_C_INTEG_FLAG
;
1235 if (feature
& GENSEC_FEATURE_SEAL
) {
1236 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1237 if (gensec_gssapi_state
->sasl
1238 && gensec_gssapi_state
->sasl_state
== STAGE_DONE
) {
1239 return ((gensec_gssapi_state
->sasl_protection
& NEG_SEAL
)
1240 && (gensec_gssapi_state
->gss_got_flags
& GSS_C_CONF_FLAG
));
1242 return gensec_gssapi_state
->gss_got_flags
& GSS_C_CONF_FLAG
;
1244 if (feature
& GENSEC_FEATURE_SESSION_KEY
) {
1245 /* Only for GSSAPI/Krb5 */
1246 if (smb_gss_oid_equal(gensec_gssapi_state
->gss_oid
,
1251 if (feature
& GENSEC_FEATURE_DCE_STYLE
) {
1252 return gensec_gssapi_state
->gss_got_flags
& GSS_C_DCE_STYLE
;
1254 if (feature
& GENSEC_FEATURE_NEW_SPNEGO
) {
1258 if (!(gensec_gssapi_state
->gss_got_flags
& GSS_C_INTEG_FLAG
)) {
1262 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "force_new_spnego", false)) {
1265 if (gensec_setting_bool(gensec_security
->settings
, "gensec_gssapi", "disable_new_spnego", false)) {
1269 status
= gssapi_get_session_key(gensec_gssapi_state
,
1270 gensec_gssapi_state
->gssapi_context
, NULL
, &keytype
);
1272 * We should do a proper sig on the mechListMic unless
1273 * we know we have to be backwards compatible with
1274 * earlier windows versions.
1276 * Negotiating a non-krb5
1277 * mech for example should be regarded as having
1280 if (NT_STATUS_IS_OK(status
)) {
1282 case ENCTYPE_DES_CBC_CRC
:
1283 case ENCTYPE_DES_CBC_MD5
:
1284 case ENCTYPE_ARCFOUR_HMAC
:
1285 case ENCTYPE_DES3_CBC_SHA1
:
1291 /* We can always do async (rather than strict request/reply) packets. */
1292 if (feature
& GENSEC_FEATURE_ASYNC_REPLIES
) {
1295 if (feature
& GENSEC_FEATURE_SIGN_PKT_HEADER
) {
1296 if (gensec_security
->want_features
& GENSEC_FEATURE_SEAL
) {
1297 /* TODO: implement this using gss_wrap_iov() */
1301 if (gensec_security
->want_features
& GENSEC_FEATURE_SIGN
) {
1310 static NTTIME
gensec_gssapi_expire_time(struct gensec_security
*gensec_security
)
1312 struct gensec_gssapi_state
*gensec_gssapi_state
=
1313 talloc_get_type_abort(gensec_security
->private_data
,
1314 struct gensec_gssapi_state
);
1316 return gensec_gssapi_state
->expire_time
;
1320 * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1321 * (for encrypting some passwords).
1323 * This breaks all the abstractions, but what do you expect...
1325 static NTSTATUS
gensec_gssapi_session_key(struct gensec_security
*gensec_security
,
1326 TALLOC_CTX
*mem_ctx
,
1327 DATA_BLOB
*session_key
)
1329 struct gensec_gssapi_state
*gensec_gssapi_state
1330 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1331 return gssapi_get_session_key(mem_ctx
, gensec_gssapi_state
->gssapi_context
, session_key
, NULL
);
1334 /* Get some basic (and authorization) information about the user on
1335 * this session. This uses either the PAC (if present) or a local
1336 * database lookup */
1337 static NTSTATUS
gensec_gssapi_session_info(struct gensec_security
*gensec_security
,
1338 TALLOC_CTX
*mem_ctx
,
1339 struct auth_session_info
**_session_info
)
1342 TALLOC_CTX
*tmp_ctx
;
1343 struct gensec_gssapi_state
*gensec_gssapi_state
1344 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1345 struct auth_session_info
*session_info
= NULL
;
1346 OM_uint32 maj_stat
, min_stat
;
1347 DATA_BLOB pac_blob
, *pac_blob_ptr
= NULL
;
1349 gss_buffer_desc name_token
;
1350 char *principal_string
;
1352 tmp_ctx
= talloc_named(mem_ctx
, 0, "gensec_gssapi_session_info context");
1353 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx
);
1355 maj_stat
= gss_display_name (&min_stat
,
1356 gensec_gssapi_state
->client_name
,
1359 if (GSS_ERROR(maj_stat
)) {
1360 DEBUG(1, ("GSS display_name failed: %s\n",
1361 gssapi_error_string(tmp_ctx
, maj_stat
, min_stat
, gensec_gssapi_state
->gss_oid
)));
1362 talloc_free(tmp_ctx
);
1363 return NT_STATUS_FOOBAR
;
1366 principal_string
= talloc_strndup(tmp_ctx
,
1367 (const char *)name_token
.value
,
1370 gss_release_buffer(&min_stat
, &name_token
);
1372 if (!principal_string
) {
1373 talloc_free(tmp_ctx
);
1374 return NT_STATUS_NO_MEMORY
;
1377 nt_status
= gssapi_obtain_pac_blob(tmp_ctx
, gensec_gssapi_state
->gssapi_context
,
1378 gensec_gssapi_state
->client_name
,
1381 /* IF we have the PAC - otherwise we need to get this
1382 * data from elsewere - local ldb, or (TODO) lookup of some
1385 if (NT_STATUS_IS_OK(nt_status
)) {
1386 pac_blob_ptr
= &pac_blob
;
1388 nt_status
= gensec_generate_session_info_pac(tmp_ctx
,
1390 gensec_gssapi_state
->smb_krb5_context
,
1391 pac_blob_ptr
, principal_string
,
1392 gensec_get_remote_address(gensec_security
),
1394 if (!NT_STATUS_IS_OK(nt_status
)) {
1395 talloc_free(tmp_ctx
);
1399 nt_status
= gensec_gssapi_session_key(gensec_security
, session_info
, &session_info
->session_key
);
1400 if (!NT_STATUS_IS_OK(nt_status
)) {
1401 talloc_free(tmp_ctx
);
1405 if (!(gensec_gssapi_state
->gss_got_flags
& GSS_C_DELEG_FLAG
)) {
1406 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1408 krb5_error_code ret
;
1409 const char *error_string
;
1411 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1412 session_info
->credentials
= cli_credentials_init(session_info
);
1413 if (!session_info
->credentials
) {
1414 talloc_free(tmp_ctx
);
1415 return NT_STATUS_NO_MEMORY
;
1418 cli_credentials_set_conf(session_info
->credentials
, gensec_security
->settings
->lp_ctx
);
1419 /* Just so we don't segfault trying to get at a username */
1420 cli_credentials_set_anonymous(session_info
->credentials
);
1422 ret
= cli_credentials_set_client_gss_creds(session_info
->credentials
,
1423 gensec_security
->settings
->lp_ctx
,
1424 gensec_gssapi_state
->delegated_cred_handle
,
1425 CRED_SPECIFIED
, &error_string
);
1427 talloc_free(tmp_ctx
);
1428 DEBUG(2,("Failed to get gss creds: %s\n", error_string
));
1429 return NT_STATUS_NO_MEMORY
;
1432 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1433 cli_credentials_set_kerberos_state(session_info
->credentials
, CRED_MUST_USE_KERBEROS
);
1435 /* It has been taken from this place... */
1436 gensec_gssapi_state
->delegated_cred_handle
= GSS_C_NO_CREDENTIAL
;
1438 *_session_info
= talloc_steal(mem_ctx
, session_info
);
1439 talloc_free(tmp_ctx
);
1441 return NT_STATUS_OK
;
1444 static size_t gensec_gssapi_sig_size(struct gensec_security
*gensec_security
, size_t data_size
)
1446 struct gensec_gssapi_state
*gensec_gssapi_state
1447 = talloc_get_type(gensec_security
->private_data
, struct gensec_gssapi_state
);
1450 if (gensec_gssapi_state
->sig_size
) {
1451 return gensec_gssapi_state
->sig_size
;
1454 if (gensec_gssapi_state
->gss_got_flags
& GSS_C_CONF_FLAG
) {
1455 gensec_gssapi_state
->sig_size
= 45;
1457 gensec_gssapi_state
->sig_size
= 37;
1460 status
= gensec_gssapi_init_lucid(gensec_gssapi_state
);
1461 if (!NT_STATUS_IS_OK(status
)) {
1462 return gensec_gssapi_state
->sig_size
;
1465 if (gensec_gssapi_state
->lucid
->protocol
== 1) {
1466 if (gensec_gssapi_state
->gss_got_flags
& GSS_C_CONF_FLAG
) {
1468 * TODO: windows uses 76 here, but we don't know
1469 * gss_wrap works with aes keys yet
1471 gensec_gssapi_state
->sig_size
= 76;
1473 gensec_gssapi_state
->sig_size
= 28;
1475 } else if (gensec_gssapi_state
->lucid
->protocol
== 0) {
1476 switch (gensec_gssapi_state
->lucid
->rfc1964_kd
.ctx_key
.type
) {
1477 case ENCTYPE_DES_CBC_CRC
:
1478 case ENCTYPE_ARCFOUR_HMAC
:
1479 case ENCTYPE_ARCFOUR_HMAC_EXP
:
1480 if (gensec_gssapi_state
->gss_got_flags
& GSS_C_CONF_FLAG
) {
1481 gensec_gssapi_state
->sig_size
= 45;
1483 gensec_gssapi_state
->sig_size
= 37;
1486 #ifdef SAMBA4_USES_HEIMDAL
1487 case ENCTYPE_OLD_DES3_CBC_SHA1
:
1488 if (gensec_gssapi_state
->gss_got_flags
& GSS_C_CONF_FLAG
) {
1489 gensec_gssapi_state
->sig_size
= 57;
1491 gensec_gssapi_state
->sig_size
= 49;
1498 return gensec_gssapi_state
->sig_size
;
1501 static const char *gensec_gssapi_krb5_oids
[] = {
1502 GENSEC_OID_KERBEROS5_OLD
,
1503 GENSEC_OID_KERBEROS5
,
1507 static const char *gensec_gssapi_spnego_oids
[] = {
1512 /* As a server, this could in theory accept any GSSAPI mech */
1513 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops
= {
1514 .name
= "gssapi_spnego",
1515 .sasl_name
= "GSS-SPNEGO",
1516 .auth_type
= DCERPC_AUTH_TYPE_SPNEGO
,
1517 .oid
= gensec_gssapi_spnego_oids
,
1518 .client_start
= gensec_gssapi_client_start
,
1519 .server_start
= gensec_gssapi_server_start
,
1520 .magic
= gensec_magic_check_krb5_oid
,
1521 .update
= gensec_gssapi_update
,
1522 .session_key
= gensec_gssapi_session_key
,
1523 .session_info
= gensec_gssapi_session_info
,
1524 .sign_packet
= gensec_gssapi_sign_packet
,
1525 .check_packet
= gensec_gssapi_check_packet
,
1526 .seal_packet
= gensec_gssapi_seal_packet
,
1527 .unseal_packet
= gensec_gssapi_unseal_packet
,
1528 .wrap
= gensec_gssapi_wrap
,
1529 .unwrap
= gensec_gssapi_unwrap
,
1530 .have_feature
= gensec_gssapi_have_feature
,
1531 .expire_time
= gensec_gssapi_expire_time
,
1534 .priority
= GENSEC_GSSAPI
1537 /* As a server, this could in theory accept any GSSAPI mech */
1538 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops
= {
1539 .name
= "gssapi_krb5",
1540 .auth_type
= DCERPC_AUTH_TYPE_KRB5
,
1541 .oid
= gensec_gssapi_krb5_oids
,
1542 .client_start
= gensec_gssapi_client_start
,
1543 .server_start
= gensec_gssapi_server_start
,
1544 .magic
= gensec_magic_check_krb5_oid
,
1545 .update
= gensec_gssapi_update
,
1546 .session_key
= gensec_gssapi_session_key
,
1547 .session_info
= gensec_gssapi_session_info
,
1548 .sig_size
= gensec_gssapi_sig_size
,
1549 .sign_packet
= gensec_gssapi_sign_packet
,
1550 .check_packet
= gensec_gssapi_check_packet
,
1551 .seal_packet
= gensec_gssapi_seal_packet
,
1552 .unseal_packet
= gensec_gssapi_unseal_packet
,
1553 .wrap
= gensec_gssapi_wrap
,
1554 .unwrap
= gensec_gssapi_unwrap
,
1555 .have_feature
= gensec_gssapi_have_feature
,
1556 .expire_time
= gensec_gssapi_expire_time
,
1559 .priority
= GENSEC_GSSAPI
1562 /* As a server, this could in theory accept any GSSAPI mech */
1563 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops
= {
1564 .name
= "gssapi_krb5_sasl",
1565 .sasl_name
= "GSSAPI",
1566 .client_start
= gensec_gssapi_sasl_client_start
,
1567 .server_start
= gensec_gssapi_sasl_server_start
,
1568 .update
= gensec_gssapi_update
,
1569 .session_key
= gensec_gssapi_session_key
,
1570 .session_info
= gensec_gssapi_session_info
,
1571 .max_input_size
= gensec_gssapi_max_input_size
,
1572 .max_wrapped_size
= gensec_gssapi_max_wrapped_size
,
1573 .wrap
= gensec_gssapi_wrap
,
1574 .unwrap
= gensec_gssapi_unwrap
,
1575 .have_feature
= gensec_gssapi_have_feature
,
1576 .expire_time
= gensec_gssapi_expire_time
,
1579 .priority
= GENSEC_GSSAPI
1582 _PUBLIC_ NTSTATUS
gensec_gssapi_init(void)
1586 ret
= gensec_register(&gensec_gssapi_spnego_security_ops
);
1587 if (!NT_STATUS_IS_OK(ret
)) {
1588 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1589 gensec_gssapi_spnego_security_ops
.name
));
1593 ret
= gensec_register(&gensec_gssapi_krb5_security_ops
);
1594 if (!NT_STATUS_IS_OK(ret
)) {
1595 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1596 gensec_gssapi_krb5_security_ops
.name
));
1600 ret
= gensec_register(&gensec_gssapi_sasl_krb5_security_ops
);
1601 if (!NT_STATUS_IS_OK(ret
)) {
1602 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1603 gensec_gssapi_sasl_krb5_security_ops
.name
));