wintest: set nameserver on a more general place
[Samba/gebeck_regimport.git] / auth / ntlmssp / ntlmssp_server.c
blobbb86c9cf20a657d1c4f8d41b8d0fca79ebaff402
1 /*
2 Unix SMB/Netbios implementation.
3 Version 3.0
4 handle NTLMSSP, server side
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett 2001-2010
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "includes.h"
24 #include "auth/ntlmssp/ntlmssp.h"
25 #include "auth/ntlmssp/ntlmssp_private.h"
26 #include "../librpc/gen_ndr/ndr_ntlmssp.h"
27 #include "auth/ntlmssp/ntlmssp_ndr.h"
28 #include "../libcli/auth/libcli_auth.h"
29 #include "../lib/crypto/crypto.h"
30 #include "auth/gensec/gensec.h"
31 #include "auth/common_auth.h"
33 /**
34 * Determine correct target name flags for reply, given server role
35 * and negotiated flags
37 * @param ntlmssp_state NTLMSSP State
38 * @param neg_flags The flags from the packet
39 * @param chal_flags The flags to be set in the reply packet
40 * @return The 'target name' string.
43 const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
44 uint32_t neg_flags, uint32_t *chal_flags)
46 if (neg_flags & NTLMSSP_REQUEST_TARGET) {
47 *chal_flags |= NTLMSSP_NEGOTIATE_TARGET_INFO;
48 *chal_flags |= NTLMSSP_REQUEST_TARGET;
49 if (ntlmssp_state->server.is_standalone) {
50 *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
51 return ntlmssp_state->server.netbios_name;
52 } else {
53 *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
54 return ntlmssp_state->server.netbios_domain;
56 } else {
57 return "";
61 /**
62 * Next state function for the NTLMSSP Negotiate packet
64 * @param gensec_security GENSEC state
65 * @param out_mem_ctx Memory context for *out
66 * @param in The request, as a DATA_BLOB. reply.data must be NULL
67 * @param out The reply, as an allocated DATA_BLOB, caller to free.
68 * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
71 NTSTATUS gensec_ntlmssp_server_negotiate(struct gensec_security *gensec_security,
72 TALLOC_CTX *out_mem_ctx,
73 const DATA_BLOB request, DATA_BLOB *reply)
75 struct gensec_ntlmssp_context *gensec_ntlmssp =
76 talloc_get_type_abort(gensec_security->private_data,
77 struct gensec_ntlmssp_context);
78 struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
79 struct auth4_context *auth_context = gensec_security->auth_context;
80 DATA_BLOB struct_blob;
81 uint32_t neg_flags = 0;
82 uint32_t ntlmssp_command, chal_flags;
83 uint8_t cryptkey[8];
84 const char *target_name;
85 NTSTATUS status;
87 /* parse the NTLMSSP packet */
88 #if 0
89 file_save("ntlmssp_negotiate.dat", request.data, request.length);
90 #endif
92 if (request.length) {
93 if ((request.length < 16) || !msrpc_parse(ntlmssp_state, &request, "Cdd",
94 "NTLMSSP",
95 &ntlmssp_command,
96 &neg_flags)) {
97 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP Negotiate of length %u\n",
98 (unsigned int)request.length));
99 dump_data(2, request.data, request.length);
100 return NT_STATUS_INVALID_PARAMETER;
102 debug_ntlmssp_flags(neg_flags);
104 if (DEBUGLEVEL >= 10) {
105 struct NEGOTIATE_MESSAGE *negotiate = talloc(
106 ntlmssp_state, struct NEGOTIATE_MESSAGE);
107 if (negotiate != NULL) {
108 status = ntlmssp_pull_NEGOTIATE_MESSAGE(
109 &request, negotiate, negotiate);
110 if (NT_STATUS_IS_OK(status)) {
111 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
112 negotiate);
114 TALLOC_FREE(negotiate);
119 ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, ntlmssp_state->allow_lm_key);
121 /* Ask our caller what challenge they would like in the packet */
122 if (auth_context->get_ntlm_challenge) {
123 status = auth_context->get_ntlm_challenge(auth_context, cryptkey);
124 if (!NT_STATUS_IS_OK(status)) {
125 DEBUG(1, ("gensec_ntlmssp_server_negotiate: failed to get challenge: %s\n",
126 nt_errstr(status)));
127 return status;
129 } else {
130 DEBUG(1, ("gensec_ntlmssp_server_negotiate: backend doesn't give a challenge\n"));
131 return NT_STATUS_NOT_IMPLEMENTED;
134 /* Check if we may set the challenge */
135 if (auth_context->challenge_may_be_modified) {
136 if (!auth_context->challenge_may_be_modified(auth_context)) {
137 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
141 /* The flags we send back are not just the negotiated flags,
142 * they are also 'what is in this packet'. Therfore, we
143 * operate on 'chal_flags' from here on
146 chal_flags = ntlmssp_state->neg_flags;
148 /* get the right name to fill in as 'target' */
149 target_name = ntlmssp_target_name(ntlmssp_state,
150 neg_flags, &chal_flags);
151 if (target_name == NULL)
152 return NT_STATUS_INVALID_PARAMETER;
154 ntlmssp_state->chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
155 ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state,
156 cryptkey, 8);
158 /* This creates the 'blob' of names that appears at the end of the packet */
159 if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO)
161 status = msrpc_gen(ntlmssp_state, &struct_blob, "aaaaa",
162 MsvAvNbDomainName, target_name,
163 MsvAvNbComputerName, ntlmssp_state->server.netbios_name,
164 MsvAvDnsDomainName, ntlmssp_state->server.dns_domain,
165 MsvAvDnsComputerName, ntlmssp_state->server.dns_name,
166 MsvAvEOL, "");
167 if (!NT_STATUS_IS_OK(status)) {
168 return status;
170 } else {
171 struct_blob = data_blob_null;
175 /* Marshal the packet in the right format, be it unicode or ASCII */
176 const char *gen_string;
177 DATA_BLOB version_blob = data_blob_null;
179 if (chal_flags & NTLMSSP_NEGOTIATE_VERSION) {
180 enum ndr_err_code err;
181 struct ntlmssp_VERSION vers;
183 /* "What Windows returns" as a version number. */
184 ZERO_STRUCT(vers);
185 vers.ProductMajorVersion = NTLMSSP_WINDOWS_MAJOR_VERSION_6;
186 vers.ProductMinorVersion = NTLMSSP_WINDOWS_MINOR_VERSION_1;
187 vers.ProductBuild = 0;
188 vers.NTLMRevisionCurrent = NTLMSSP_REVISION_W2K3;
190 err = ndr_push_struct_blob(&version_blob,
191 ntlmssp_state,
192 &vers,
193 (ndr_push_flags_fn_t)ndr_push_ntlmssp_VERSION);
195 if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
196 data_blob_free(&struct_blob);
197 return NT_STATUS_NO_MEMORY;
201 if (ntlmssp_state->unicode) {
202 gen_string = "CdUdbddBb";
203 } else {
204 gen_string = "CdAdbddBb";
207 status = msrpc_gen(out_mem_ctx, reply, gen_string,
208 "NTLMSSP",
209 NTLMSSP_CHALLENGE,
210 target_name,
211 chal_flags,
212 cryptkey, 8,
213 0, 0,
214 struct_blob.data, struct_blob.length,
215 version_blob.data, version_blob.length);
217 if (!NT_STATUS_IS_OK(status)) {
218 data_blob_free(&version_blob);
219 data_blob_free(&struct_blob);
220 return status;
223 data_blob_free(&version_blob);
225 if (DEBUGLEVEL >= 10) {
226 struct CHALLENGE_MESSAGE *challenge = talloc(
227 ntlmssp_state, struct CHALLENGE_MESSAGE);
228 if (challenge != NULL) {
229 challenge->NegotiateFlags = chal_flags;
230 status = ntlmssp_pull_CHALLENGE_MESSAGE(
231 reply, challenge, challenge);
232 if (NT_STATUS_IS_OK(status)) {
233 NDR_PRINT_DEBUG(CHALLENGE_MESSAGE,
234 challenge);
236 TALLOC_FREE(challenge);
241 data_blob_free(&struct_blob);
243 ntlmssp_state->expected_state = NTLMSSP_AUTH;
245 return NT_STATUS_MORE_PROCESSING_REQUIRED;
248 struct ntlmssp_server_auth_state {
249 DATA_BLOB user_session_key;
250 DATA_BLOB lm_session_key;
251 /* internal variables used by KEY_EXCH (client-supplied user session key */
252 DATA_BLOB encrypted_session_key;
253 bool doing_ntlm2;
254 /* internal variables used by NTLM2 */
255 uint8_t session_nonce[16];
259 * Next state function for the Authenticate packet
261 * @param ntlmssp_state NTLMSSP State
262 * @param request The request, as a DATA_BLOB
263 * @return Errors or NT_STATUS_OK.
266 static NTSTATUS ntlmssp_server_preauth(struct gensec_security *gensec_security,
267 struct gensec_ntlmssp_context *gensec_ntlmssp,
268 struct ntlmssp_server_auth_state *state,
269 const DATA_BLOB request)
271 struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
272 struct auth4_context *auth_context = gensec_security->auth_context;
273 uint32_t ntlmssp_command, auth_flags;
274 NTSTATUS nt_status;
276 uint8_t session_nonce_hash[16];
278 const char *parse_string;
280 #if 0
281 file_save("ntlmssp_auth.dat", request.data, request.length);
282 #endif
284 if (ntlmssp_state->unicode) {
285 parse_string = "CdBBUUUBd";
286 } else {
287 parse_string = "CdBBAAABd";
290 /* zero these out */
291 data_blob_free(&ntlmssp_state->session_key);
292 data_blob_free(&ntlmssp_state->lm_resp);
293 data_blob_free(&ntlmssp_state->nt_resp);
295 ntlmssp_state->user = NULL;
296 ntlmssp_state->domain = NULL;
297 ntlmssp_state->client.netbios_name = NULL;
299 /* now the NTLMSSP encoded auth hashes */
300 if (!msrpc_parse(ntlmssp_state, &request, parse_string,
301 "NTLMSSP",
302 &ntlmssp_command,
303 &ntlmssp_state->lm_resp,
304 &ntlmssp_state->nt_resp,
305 &ntlmssp_state->domain,
306 &ntlmssp_state->user,
307 &ntlmssp_state->client.netbios_name,
308 &state->encrypted_session_key,
309 &auth_flags)) {
310 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
311 dump_data(10, request.data, request.length);
313 /* zero this out */
314 data_blob_free(&state->encrypted_session_key);
315 auth_flags = 0;
317 /* Try again with a shorter string (Win9X truncates this packet) */
318 if (ntlmssp_state->unicode) {
319 parse_string = "CdBBUUU";
320 } else {
321 parse_string = "CdBBAAA";
324 /* now the NTLMSSP encoded auth hashes */
325 if (!msrpc_parse(ntlmssp_state, &request, parse_string,
326 "NTLMSSP",
327 &ntlmssp_command,
328 &ntlmssp_state->lm_resp,
329 &ntlmssp_state->nt_resp,
330 &ntlmssp_state->domain,
331 &ntlmssp_state->user,
332 &ntlmssp_state->client.netbios_name)) {
333 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP (tried both formats):\n"));
334 dump_data(2, request.data, request.length);
336 return NT_STATUS_INVALID_PARAMETER;
340 talloc_steal(state, state->encrypted_session_key.data);
342 if (auth_flags)
343 ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, ntlmssp_state->allow_lm_key);
345 if (DEBUGLEVEL >= 10) {
346 struct AUTHENTICATE_MESSAGE *authenticate = talloc(
347 ntlmssp_state, struct AUTHENTICATE_MESSAGE);
348 if (authenticate != NULL) {
349 NTSTATUS status;
350 authenticate->NegotiateFlags = auth_flags;
351 status = ntlmssp_pull_AUTHENTICATE_MESSAGE(
352 &request, authenticate, authenticate);
353 if (NT_STATUS_IS_OK(status)) {
354 NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE,
355 authenticate);
357 TALLOC_FREE(authenticate);
361 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
362 ntlmssp_state->user, ntlmssp_state->domain,
363 ntlmssp_state->client.netbios_name,
364 (unsigned long)ntlmssp_state->lm_resp.length,
365 (unsigned long)ntlmssp_state->nt_resp.length));
367 #if 0
368 file_save("nthash1.dat", &ntlmssp_state->nt_resp.data, &ntlmssp_state->nt_resp.length);
369 file_save("lmhash1.dat", &ntlmssp_state->lm_resp.data, &ntlmssp_state->lm_resp.length);
370 #endif
372 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
373 client challenge
375 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
377 if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
378 if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
379 struct MD5Context md5_session_nonce_ctx;
380 state->doing_ntlm2 = true;
382 memcpy(state->session_nonce, ntlmssp_state->internal_chal.data, 8);
383 memcpy(&state->session_nonce[8], ntlmssp_state->lm_resp.data, 8);
385 SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
387 MD5Init(&md5_session_nonce_ctx);
388 MD5Update(&md5_session_nonce_ctx, state->session_nonce, 16);
389 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
391 /* LM response is no longer useful */
392 data_blob_free(&ntlmssp_state->lm_resp);
394 /* We changed the effective challenge - set it */
395 if (auth_context->set_ntlm_challenge) {
396 nt_status = auth_context->set_ntlm_challenge(auth_context,
397 session_nonce_hash,
398 "NTLMSSP callback (NTLM2)");
399 if (!NT_STATUS_IS_OK(nt_status)) {
400 DEBUG(1, ("gensec_ntlmssp_server_negotiate: failed to get challenge: %s\n",
401 nt_errstr(nt_status)));
402 return nt_status;
404 } else {
405 DEBUG(1, ("gensec_ntlmssp_server_negotiate: backend doesn't have facility for challenge to be set\n"));
407 return NT_STATUS_NOT_IMPLEMENTED;
410 /* LM Key is incompatible. */
411 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
414 return NT_STATUS_OK;
418 * Check the password on an NTLMSSP login.
420 * Return the session keys used on the connection.
423 static NTSTATUS ntlmssp_server_check_password(struct gensec_security *gensec_security,
424 struct gensec_ntlmssp_context *gensec_ntlmssp,
425 TALLOC_CTX *mem_ctx,
426 DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
428 struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
429 struct auth4_context *auth_context = gensec_security->auth_context;
430 NTSTATUS nt_status = NT_STATUS_NOT_IMPLEMENTED;
431 struct auth_usersupplied_info *user_info;
433 user_info = talloc_zero(ntlmssp_state, struct auth_usersupplied_info);
434 if (!user_info) {
435 return NT_STATUS_NO_MEMORY;
438 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
439 user_info->flags = 0;
440 user_info->mapped_state = false;
441 user_info->client.account_name = ntlmssp_state->user;
442 user_info->client.domain_name = ntlmssp_state->domain;
443 user_info->workstation_name = ntlmssp_state->client.netbios_name;
444 user_info->remote_host = gensec_get_remote_address(gensec_security);
446 user_info->password_state = AUTH_PASSWORD_RESPONSE;
447 user_info->password.response.lanman = ntlmssp_state->lm_resp;
448 user_info->password.response.lanman.data = talloc_steal(user_info, ntlmssp_state->lm_resp.data);
449 user_info->password.response.nt = ntlmssp_state->nt_resp;
450 user_info->password.response.nt.data = talloc_steal(user_info, ntlmssp_state->nt_resp.data);
452 if (auth_context->check_ntlm_password) {
453 nt_status = auth_context->check_ntlm_password(auth_context,
454 gensec_ntlmssp,
455 user_info,
456 &gensec_ntlmssp->server_returned_info,
457 user_session_key, lm_session_key);
459 talloc_free(user_info);
461 if (!NT_STATUS_IS_OK(nt_status)) {
462 DEBUG(5, (__location__ ": Checking NTLMSSP password for %s\\%s failed: %s\n", user_info->client.domain_name, user_info->client.account_name, nt_errstr(nt_status)));
465 NT_STATUS_NOT_OK_RETURN(nt_status);
467 talloc_steal(mem_ctx, user_session_key->data);
468 talloc_steal(mem_ctx, lm_session_key->data);
470 return nt_status;
474 * Next state function for the Authenticate packet
475 * (after authentication - figures out the session keys etc)
477 * @param ntlmssp_state NTLMSSP State
478 * @return Errors or NT_STATUS_OK.
481 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
482 struct gensec_ntlmssp_context *gensec_ntlmssp,
483 struct ntlmssp_server_auth_state *state)
485 struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
486 DATA_BLOB user_session_key = state->user_session_key;
487 DATA_BLOB lm_session_key = state->lm_session_key;
488 NTSTATUS nt_status = NT_STATUS_OK;
489 DATA_BLOB session_key = data_blob(NULL, 0);
491 dump_data_pw("NT session key:\n", user_session_key.data, user_session_key.length);
492 dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
494 /* Handle the different session key derivation for NTLM2 */
495 if (state->doing_ntlm2) {
496 if (user_session_key.data && user_session_key.length == 16) {
497 session_key = data_blob_talloc(ntlmssp_state,
498 NULL, 16);
499 hmac_md5(user_session_key.data, state->session_nonce,
500 sizeof(state->session_nonce), session_key.data);
501 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
502 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
504 } else {
505 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
506 session_key = data_blob_null;
508 } else if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
509 /* Ensure we can never get here on NTLMv2 */
510 && (ntlmssp_state->nt_resp.length == 0 || ntlmssp_state->nt_resp.length == 24)) {
512 if (lm_session_key.data && lm_session_key.length >= 8) {
513 if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
514 session_key = data_blob_talloc(ntlmssp_state,
515 NULL, 16);
516 if (session_key.data == NULL) {
517 return NT_STATUS_NO_MEMORY;
519 SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
520 session_key.data);
521 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
522 } else {
523 static const uint8_t zeros[24] = {0, };
524 session_key = data_blob_talloc(
525 ntlmssp_state, NULL, 16);
526 if (session_key.data == NULL) {
527 return NT_STATUS_NO_MEMORY;
529 SMBsesskeygen_lm_sess_key(zeros, zeros,
530 session_key.data);
531 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
533 dump_data_pw("LM session key:\n", session_key.data,
534 session_key.length);
535 } else {
536 /* LM Key not selected */
537 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
539 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
540 session_key = data_blob_null;
543 } else if (user_session_key.data) {
544 session_key = user_session_key;
545 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
546 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
548 /* LM Key not selected */
549 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
551 } else if (lm_session_key.data) {
552 /* Very weird to have LM key, but no user session key, but anyway.. */
553 session_key = lm_session_key;
554 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
555 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
557 /* LM Key not selected */
558 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
560 } else {
561 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
562 session_key = data_blob_null;
564 /* LM Key not selected */
565 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
568 /* With KEY_EXCH, the client supplies the proposed session key,
569 but encrypts it with the long-term key */
570 if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
571 if (!state->encrypted_session_key.data
572 || state->encrypted_session_key.length != 16) {
573 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
574 (unsigned)state->encrypted_session_key.length));
575 return NT_STATUS_INVALID_PARAMETER;
576 } else if (!session_key.data || session_key.length != 16) {
577 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
578 (unsigned int)session_key.length));
579 ntlmssp_state->session_key = session_key;
580 talloc_steal(ntlmssp_state, session_key.data);
581 } else {
582 dump_data_pw("KEY_EXCH session key (enc):\n",
583 state->encrypted_session_key.data,
584 state->encrypted_session_key.length);
585 arcfour_crypt(state->encrypted_session_key.data,
586 session_key.data,
587 state->encrypted_session_key.length);
588 ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state,
589 state->encrypted_session_key.data,
590 state->encrypted_session_key.length);
591 dump_data_pw("KEY_EXCH session key:\n",
592 state->encrypted_session_key.data,
593 state->encrypted_session_key.length);
595 } else {
596 ntlmssp_state->session_key = session_key;
597 talloc_steal(ntlmssp_state, session_key.data);
600 if (ntlmssp_state->session_key.length) {
601 nt_status = ntlmssp_sign_init(ntlmssp_state);
604 ntlmssp_state->expected_state = NTLMSSP_DONE;
606 return nt_status;
611 * Next state function for the NTLMSSP Authenticate packet
613 * @param gensec_security GENSEC state
614 * @param out_mem_ctx Memory context for *out
615 * @param in The request, as a DATA_BLOB. reply.data must be NULL
616 * @param out The reply, as an allocated DATA_BLOB, caller to free.
617 * @return Errors or NT_STATUS_OK if authentication sucessful
620 NTSTATUS gensec_ntlmssp_server_auth(struct gensec_security *gensec_security,
621 TALLOC_CTX *out_mem_ctx,
622 const DATA_BLOB in, DATA_BLOB *out)
624 struct gensec_ntlmssp_context *gensec_ntlmssp =
625 talloc_get_type_abort(gensec_security->private_data,
626 struct gensec_ntlmssp_context);
627 struct ntlmssp_server_auth_state *state;
628 NTSTATUS nt_status;
630 /* zero the outbound NTLMSSP packet */
631 *out = data_blob_null;
633 state = talloc_zero(gensec_ntlmssp, struct ntlmssp_server_auth_state);
634 if (state == NULL) {
635 return NT_STATUS_NO_MEMORY;
638 nt_status = ntlmssp_server_preauth(gensec_security, gensec_ntlmssp, state, in);
639 if (!NT_STATUS_IS_OK(nt_status)) {
640 TALLOC_FREE(state);
641 return nt_status;
645 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
646 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
647 * smb.conf file) and no NTLMv2 response was sent then the password check
648 * will fail here. JRA.
651 /* Finally, actually ask if the password is OK */
652 nt_status = ntlmssp_server_check_password(gensec_security, gensec_ntlmssp,
653 state,
654 &state->user_session_key,
655 &state->lm_session_key);
656 if (!NT_STATUS_IS_OK(nt_status)) {
657 TALLOC_FREE(state);
658 return nt_status;
661 /* When we get more async in the auth code behind
662 ntlmssp_state->check_password, the ntlmssp_server_postpath
663 can be done in a callback */
665 nt_status = ntlmssp_server_postauth(gensec_security, gensec_ntlmssp, state);
666 TALLOC_FREE(state);
667 return nt_status;