2 Unix SMB/Netbios implementation.
4 handle NLTMSSP, client server side parsing
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
8 Copyright (C) Stefan Metzmacher 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 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 "system/network.h"
26 #include "auth/ntlmssp/ntlmssp.h"
27 #include "../libcli/auth/libcli_auth.h"
28 #include "../lib/crypto/crypto.h"
29 #include "auth/gensec/gensec.h"
30 #include "auth/auth.h"
31 #include "param/param.h"
34 * Set a username on an NTLMSSP context - ensures it is talloc()ed
38 static NTSTATUS ntlmssp_set_username(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *user)
41 /* it should be at least "" */
42 DEBUG(1, ("NTLMSSP failed to set username - cannot accept NULL username\n"));
43 return NT_STATUS_INVALID_PARAMETER;
45 gensec_ntlmssp_state->user = talloc_strdup(gensec_ntlmssp_state, user);
46 if (!gensec_ntlmssp_state->user) {
47 return NT_STATUS_NO_MEMORY;
53 * Set a domain on an NTLMSSP context - ensures it is talloc()ed
56 static NTSTATUS ntlmssp_set_domain(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *domain)
58 gensec_ntlmssp_state->domain = talloc_strdup(gensec_ntlmssp_state, domain);
59 if (!gensec_ntlmssp_state->domain) {
60 return NT_STATUS_NO_MEMORY;
66 * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
69 static NTSTATUS ntlmssp_set_workstation(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *workstation)
71 gensec_ntlmssp_state->workstation = talloc_strdup(gensec_ntlmssp_state, workstation);
72 if (!gensec_ntlmssp_state->workstation) {
73 return NT_STATUS_NO_MEMORY;
79 * Determine correct target name flags for reply, given server role
80 * and negotiated flags
82 * @param gensec_ntlmssp_state NTLMSSP State
83 * @param neg_flags The flags from the packet
84 * @param chal_flags The flags to be set in the reply packet
85 * @return The 'target name' string.
88 static const char *ntlmssp_target_name(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
89 uint32_t neg_flags, uint32_t *chal_flags)
91 if (neg_flags & NTLMSSP_REQUEST_TARGET) {
92 *chal_flags |= NTLMSSP_NEGOTIATE_TARGET_INFO;
93 *chal_flags |= NTLMSSP_REQUEST_TARGET;
94 if (gensec_ntlmssp_state->server_role == ROLE_STANDALONE) {
95 *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
96 return gensec_ntlmssp_state->server_name;
98 *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
99 return gensec_ntlmssp_state->domain;
109 * Next state function for the Negotiate packet
111 * @param gensec_security GENSEC state
112 * @param out_mem_ctx Memory context for *out
113 * @param in The request, as a DATA_BLOB. reply.data must be NULL
114 * @param out The reply, as an allocated DATA_BLOB, caller to free.
115 * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
118 NTSTATUS ntlmssp_server_negotiate(struct gensec_security *gensec_security,
119 TALLOC_CTX *out_mem_ctx,
120 const DATA_BLOB in, DATA_BLOB *out)
122 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
123 DATA_BLOB struct_blob;
124 uint32_t neg_flags = 0;
125 uint32_t ntlmssp_command, chal_flags;
126 const uint8_t *cryptkey;
127 const char *target_name;
129 /* parse the NTLMSSP packet */
131 file_save("ntlmssp_negotiate.dat", request.data, request.length);
135 if ((in.length < 16) || !msrpc_parse(out_mem_ctx,
140 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse "
141 "NTLMSSP Negotiate of length %u:\n",
142 (unsigned int)in.length ));
143 dump_data(2, in.data, in.length);
144 return NT_STATUS_INVALID_PARAMETER;
146 debug_ntlmssp_flags(neg_flags);
149 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, neg_flags, gensec_ntlmssp_state->allow_lm_key);
151 /* Ask our caller what challenge they would like in the packet */
152 cryptkey = gensec_ntlmssp_state->get_challenge(gensec_ntlmssp_state);
154 DEBUG(1, ("ntlmssp_server_negotiate: backend doesn't give a challenge\n"));
155 return NT_STATUS_INTERNAL_ERROR;
158 /* Check if we may set the challenge */
159 if (!gensec_ntlmssp_state->may_set_challenge(gensec_ntlmssp_state)) {
160 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
163 /* The flags we send back are not just the negotiated flags,
164 * they are also 'what is in this packet'. Therfore, we
165 * operate on 'chal_flags' from here on
168 chal_flags = gensec_ntlmssp_state->neg_flags;
170 /* get the right name to fill in as 'target' */
171 target_name = ntlmssp_target_name(gensec_ntlmssp_state,
172 neg_flags, &chal_flags);
173 if (target_name == NULL)
174 return NT_STATUS_INVALID_PARAMETER;
176 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
177 gensec_ntlmssp_state->internal_chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
179 /* This creates the 'blob' of names that appears at the end of the packet */
180 if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
181 char dnsdomname[MAXHOSTNAMELEN], dnsname[MAXHOSTNAMELEN];
182 const char *target_name_dns = "";
184 /* Find out the DNS domain name */
185 dnsdomname[0] = '\0';
186 safe_strcpy(dnsdomname, lp_dnsdomain(gensec_security->settings->lp_ctx), sizeof(dnsdomname) - 1);
188 /* Find out the DNS host name */
189 safe_strcpy(dnsname, gensec_ntlmssp_state->server_name, sizeof(dnsname) - 1);
190 if (dnsdomname[0] != '\0') {
191 safe_strcat(dnsname, ".", sizeof(dnsname) - 1);
192 safe_strcat(dnsname, dnsdomname, sizeof(dnsname) - 1);
196 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
197 target_name_dns = dnsdomname;
198 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
199 target_name_dns = dnsname;
202 msrpc_gen(out_mem_ctx,
203 &struct_blob, "aaaaa",
204 MsvAvNbDomainName, target_name,
205 MsvAvNbComputerName, gensec_ntlmssp_state->server_name,
206 MsvAvDnsDomainName, dnsdomname,
207 MsvAvDnsComputerName, dnsname,
210 struct_blob = data_blob(NULL, 0);
214 /* Marshal the packet in the right format, be it unicode or ASCII */
215 const char *gen_string;
216 if (gensec_ntlmssp_state->unicode) {
217 gen_string = "CdUdbddB";
219 gen_string = "CdAdbddB";
222 msrpc_gen(out_mem_ctx,
230 struct_blob.data, struct_blob.length);
233 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
235 return NT_STATUS_MORE_PROCESSING_REQUIRED;
239 * Next state function for the Authenticate packet
241 * @param gensec_ntlmssp_state NTLMSSP State
242 * @param request The request, as a DATA_BLOB
243 * @return Errors or NT_STATUS_OK.
246 static NTSTATUS ntlmssp_server_preauth(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
247 const DATA_BLOB request)
249 uint32_t ntlmssp_command, auth_flags;
252 uint8_t session_nonce_hash[16];
254 const char *parse_string;
257 char *workstation = NULL;
260 file_save("ntlmssp_auth.dat", request.data, request.length);
263 if (gensec_ntlmssp_state->unicode) {
264 parse_string = "CdBBUUUBd";
266 parse_string = "CdBBAAABd";
270 data_blob_free(&gensec_ntlmssp_state->lm_resp);
271 data_blob_free(&gensec_ntlmssp_state->nt_resp);
272 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
274 gensec_ntlmssp_state->user = NULL;
275 gensec_ntlmssp_state->domain = NULL;
276 gensec_ntlmssp_state->workstation = NULL;
278 /* now the NTLMSSP encoded auth hashes */
279 if (!msrpc_parse(gensec_ntlmssp_state,
280 &request, parse_string,
283 &gensec_ntlmssp_state->lm_resp,
284 &gensec_ntlmssp_state->nt_resp,
288 &gensec_ntlmssp_state->encrypted_session_key,
290 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
291 dump_data(10, request.data, request.length);
294 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
297 /* Try again with a shorter string (Win9X truncates this packet) */
298 if (gensec_ntlmssp_state->unicode) {
299 parse_string = "CdBBUUU";
301 parse_string = "CdBBAAA";
304 /* now the NTLMSSP encoded auth hashes */
305 if (!msrpc_parse(gensec_ntlmssp_state,
306 &request, parse_string,
309 &gensec_ntlmssp_state->lm_resp,
310 &gensec_ntlmssp_state->nt_resp,
314 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
315 dump_data(2, request.data, request.length);
317 return NT_STATUS_INVALID_PARAMETER;
322 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, auth_flags, gensec_ntlmssp_state->allow_lm_key);
324 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(gensec_ntlmssp_state, domain))) {
326 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
330 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(gensec_ntlmssp_state, user))) {
332 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
336 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state, workstation))) {
338 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
342 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
343 gensec_ntlmssp_state->user, gensec_ntlmssp_state->domain, gensec_ntlmssp_state->workstation, (unsigned long)gensec_ntlmssp_state->lm_resp.length, (unsigned long)gensec_ntlmssp_state->nt_resp.length));
346 file_save("nthash1.dat", &gensec_ntlmssp_state->nt_resp.data, &gensec_ntlmssp_state->nt_resp.length);
347 file_save("lmhash1.dat", &gensec_ntlmssp_state->lm_resp.data, &gensec_ntlmssp_state->lm_resp.length);
350 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
353 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
355 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
356 if (gensec_ntlmssp_state->nt_resp.length == 24 && gensec_ntlmssp_state->lm_resp.length == 24) {
357 struct MD5Context md5_session_nonce_ctx;
358 SMB_ASSERT(gensec_ntlmssp_state->internal_chal.data
359 && gensec_ntlmssp_state->internal_chal.length == 8);
361 gensec_ntlmssp_state->doing_ntlm2 = true;
363 memcpy(gensec_ntlmssp_state->crypt.ntlm2.session_nonce, gensec_ntlmssp_state->internal_chal.data, 8);
364 memcpy(&gensec_ntlmssp_state->crypt.ntlm2.session_nonce[8], gensec_ntlmssp_state->lm_resp.data, 8);
366 MD5Init(&md5_session_nonce_ctx);
367 MD5Update(&md5_session_nonce_ctx, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, 16);
368 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
370 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state,
371 session_nonce_hash, 8);
373 /* LM response is no longer useful, zero it out */
374 data_blob_free(&gensec_ntlmssp_state->lm_resp);
376 /* We changed the effective challenge - set it */
377 if (!NT_STATUS_IS_OK(nt_status =
378 gensec_ntlmssp_state->set_challenge(gensec_ntlmssp_state,
379 &gensec_ntlmssp_state->chal))) {
381 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
385 /* LM Key is incompatible... */
386 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
393 * Next state function for the Authenticate packet
394 * (after authentication - figures out the session keys etc)
396 * @param gensec_ntlmssp_state NTLMSSP State
397 * @return Errors or NT_STATUS_OK.
400 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
401 DATA_BLOB *user_session_key,
402 DATA_BLOB *lm_session_key)
404 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
406 DATA_BLOB session_key = data_blob(NULL, 0);
408 if (user_session_key)
409 dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
412 dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
414 /* Handle the different session key derivation for NTLM2 */
415 if (gensec_ntlmssp_state->doing_ntlm2) {
416 if (user_session_key && user_session_key->data && user_session_key->length == 16) {
417 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
418 hmac_md5(user_session_key->data, gensec_ntlmssp_state->crypt.ntlm2.session_nonce,
419 sizeof(gensec_ntlmssp_state->crypt.ntlm2.session_nonce), session_key.data);
420 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
421 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
424 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
425 session_key = data_blob(NULL, 0);
427 } else if ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
428 /* Ensure we can never get here on NTLMv2 */
429 && (gensec_ntlmssp_state->nt_resp.length == 0 || gensec_ntlmssp_state->nt_resp.length == 24)) {
431 if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
432 if (gensec_ntlmssp_state->lm_resp.data && gensec_ntlmssp_state->lm_resp.length == 24) {
433 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
434 SMBsesskeygen_lm_sess_key(lm_session_key->data, gensec_ntlmssp_state->lm_resp.data,
436 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
437 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
440 /* When there is no LM response, just use zeros */
441 static const uint8_t zeros[24];
442 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
443 SMBsesskeygen_lm_sess_key(zeros, zeros,
445 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
446 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
449 /* LM Key not selected */
450 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
452 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
453 session_key = data_blob(NULL, 0);
456 } else if (user_session_key && user_session_key->data) {
457 session_key = data_blob_talloc(gensec_ntlmssp_state, user_session_key->data, user_session_key->length);
458 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
459 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
461 /* LM Key not selected */
462 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
464 } else if (lm_session_key && lm_session_key->data) {
465 /* Very weird to have LM key, but no user session key, but anyway.. */
466 session_key = data_blob_talloc(gensec_ntlmssp_state, lm_session_key->data, lm_session_key->length);
467 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
468 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
470 /* LM Key not selected */
471 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
474 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
475 session_key = data_blob(NULL, 0);
477 /* LM Key not selected */
478 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
481 /* With KEY_EXCH, the client supplies the proposed session key,
482 but encrypts it with the long-term key */
483 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
484 if (!gensec_ntlmssp_state->encrypted_session_key.data
485 || gensec_ntlmssp_state->encrypted_session_key.length != 16) {
486 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
487 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
488 (unsigned)gensec_ntlmssp_state->encrypted_session_key.length));
489 return NT_STATUS_INVALID_PARAMETER;
490 } else if (!session_key.data || session_key.length != 16) {
491 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
492 (unsigned)session_key.length));
493 gensec_ntlmssp_state->session_key = session_key;
495 dump_data_pw("KEY_EXCH session key (enc):\n",
496 gensec_ntlmssp_state->encrypted_session_key.data,
497 gensec_ntlmssp_state->encrypted_session_key.length);
498 arcfour_crypt(gensec_ntlmssp_state->encrypted_session_key.data,
500 gensec_ntlmssp_state->encrypted_session_key.length);
501 gensec_ntlmssp_state->session_key = data_blob_talloc(gensec_ntlmssp_state,
502 gensec_ntlmssp_state->encrypted_session_key.data,
503 gensec_ntlmssp_state->encrypted_session_key.length);
504 dump_data_pw("KEY_EXCH session key:\n", gensec_ntlmssp_state->encrypted_session_key.data,
505 gensec_ntlmssp_state->encrypted_session_key.length);
506 talloc_free(session_key.data);
509 gensec_ntlmssp_state->session_key = session_key;
512 if ((gensec_security->want_features & GENSEC_FEATURE_SIGN)
513 || (gensec_security->want_features & GENSEC_FEATURE_SEAL)) {
514 nt_status = ntlmssp_sign_init(gensec_ntlmssp_state);
516 nt_status = NT_STATUS_OK;
519 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
521 /* allow arbitarily many authentications, but watch that this will cause a
522 memory leak, until the gensec_ntlmssp_state is shutdown
525 if (gensec_ntlmssp_state->server_multiple_authentications) {
526 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
528 gensec_ntlmssp_state->expected_state = NTLMSSP_DONE;
536 * Next state function for the Authenticate packet
538 * @param gensec_security GENSEC state
539 * @param out_mem_ctx Memory context for *out
540 * @param in The request, as a DATA_BLOB. reply.data must be NULL
541 * @param out The reply, as an allocated DATA_BLOB, caller to free.
542 * @return Errors or NT_STATUS_OK if authentication sucessful
545 NTSTATUS ntlmssp_server_auth(struct gensec_security *gensec_security,
546 TALLOC_CTX *out_mem_ctx,
547 const DATA_BLOB in, DATA_BLOB *out)
549 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
550 DATA_BLOB user_session_key = data_blob(NULL, 0);
551 DATA_BLOB lm_session_key = data_blob(NULL, 0);
554 TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
556 return NT_STATUS_NO_MEMORY;
559 /* zero the outbound NTLMSSP packet */
560 *out = data_blob_talloc(out_mem_ctx, NULL, 0);
562 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(gensec_ntlmssp_state, in))) {
563 talloc_free(mem_ctx);
568 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
569 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
570 * smb.conf file) and no NTLMv2 response was sent then the password check
571 * will fail here. JRA.
574 /* Finally, actually ask if the password is OK */
576 if (!NT_STATUS_IS_OK(nt_status = gensec_ntlmssp_state->check_password(gensec_ntlmssp_state, mem_ctx,
577 &user_session_key, &lm_session_key))) {
578 talloc_free(mem_ctx);
582 if (gensec_security->want_features
583 & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL|GENSEC_FEATURE_SESSION_KEY)) {
584 nt_status = ntlmssp_server_postauth(gensec_security, &user_session_key, &lm_session_key);
585 talloc_free(mem_ctx);
588 gensec_ntlmssp_state->session_key = data_blob(NULL, 0);
589 talloc_free(mem_ctx);
595 * Return the challenge as determined by the authentication subsystem
596 * @return an 8 byte random challenge
599 static const uint8_t *auth_ntlmssp_get_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
604 status = gensec_ntlmssp_state->auth_context->get_challenge(gensec_ntlmssp_state->auth_context, &chal);
605 if (!NT_STATUS_IS_OK(status)) {
606 DEBUG(1, ("auth_ntlmssp_get_challenge: failed to get challenge: %s\n",
615 * Some authentication methods 'fix' the challenge, so we may not be able to set it
617 * @return If the effective challenge used by the auth subsystem may be modified
619 static bool auth_ntlmssp_may_set_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
621 return gensec_ntlmssp_state->auth_context->challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
625 * NTLM2 authentication modifies the effective challenge,
626 * @param challenge The new challenge value
628 static NTSTATUS auth_ntlmssp_set_challenge(struct gensec_ntlmssp_state *gensec_ntlmssp_state, DATA_BLOB *challenge)
631 struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
634 if (challenge->length != 8) {
635 return NT_STATUS_INVALID_PARAMETER;
638 chal = challenge->data;
640 nt_status = gensec_ntlmssp_state->auth_context->set_challenge(auth_context,
642 "NTLMSSP callback (NTLM2)");
648 * Check the password on an NTLMSSP login.
650 * Return the session keys used on the connection.
653 static NTSTATUS auth_ntlmssp_check_password(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
655 DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
658 struct auth_usersupplied_info *user_info = talloc(mem_ctx, struct auth_usersupplied_info);
660 return NT_STATUS_NO_MEMORY;
663 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
664 user_info->flags = 0;
665 user_info->mapped_state = false;
666 user_info->client.account_name = gensec_ntlmssp_state->user;
667 user_info->client.domain_name = gensec_ntlmssp_state->domain;
668 user_info->workstation_name = gensec_ntlmssp_state->workstation;
669 user_info->remote_host = gensec_get_peer_addr(gensec_ntlmssp_state->gensec_security);
671 user_info->password_state = AUTH_PASSWORD_RESPONSE;
672 user_info->password.response.lanman = gensec_ntlmssp_state->lm_resp;
673 user_info->password.response.lanman.data = talloc_steal(user_info, gensec_ntlmssp_state->lm_resp.data);
674 user_info->password.response.nt = gensec_ntlmssp_state->nt_resp;
675 user_info->password.response.nt.data = talloc_steal(user_info, gensec_ntlmssp_state->nt_resp.data);
677 nt_status = gensec_ntlmssp_state->auth_context->check_password(gensec_ntlmssp_state->auth_context,
680 &gensec_ntlmssp_state->server_info);
681 talloc_free(user_info);
682 NT_STATUS_NOT_OK_RETURN(nt_status);
684 talloc_steal(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info);
686 if (gensec_ntlmssp_state->server_info->user_session_key.length) {
687 DEBUG(10, ("Got NT session key of length %u\n",
688 (unsigned)gensec_ntlmssp_state->server_info->user_session_key.length));
689 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->user_session_key.data)) {
690 return NT_STATUS_NO_MEMORY;
693 *user_session_key = gensec_ntlmssp_state->server_info->user_session_key;
695 if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
696 DEBUG(10, ("Got LM session key of length %u\n",
697 (unsigned)gensec_ntlmssp_state->server_info->lm_session_key.length));
698 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->lm_session_key.data)) {
699 return NT_STATUS_NO_MEMORY;
702 *lm_session_key = gensec_ntlmssp_state->server_info->lm_session_key;
708 * Return the credentials of a logged on user, including session keys
711 * Only valid after a successful authentication
713 * May only be called once per authentication.
717 NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
718 struct auth_session_info **session_info)
721 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
723 nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_security->event_ctx, gensec_security->settings->lp_ctx, gensec_ntlmssp_state->server_info, session_info);
724 NT_STATUS_NOT_OK_RETURN(nt_status);
726 (*session_info)->session_key = data_blob_talloc(*session_info,
727 gensec_ntlmssp_state->session_key.data,
728 gensec_ntlmssp_state->session_key.length);
734 * Start NTLMSSP on the server side
737 NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
740 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
742 nt_status = gensec_ntlmssp_start(gensec_security);
743 NT_STATUS_NOT_OK_RETURN(nt_status);
745 gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
747 gensec_ntlmssp_state->role = NTLMSSP_SERVER;
749 gensec_ntlmssp_state->workstation = NULL;
750 gensec_ntlmssp_state->server_name = lp_netbios_name(gensec_security->settings->lp_ctx);
752 gensec_ntlmssp_state->domain = lp_workgroup(gensec_security->settings->lp_ctx);
754 gensec_ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
756 gensec_ntlmssp_state->allow_lm_key = (lp_lanman_auth(gensec_security->settings->lp_ctx)
757 && gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "allow_lm_key", false));
759 gensec_ntlmssp_state->server_multiple_authentications = false;
761 gensec_ntlmssp_state->neg_flags =
762 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_VERSION;
764 gensec_ntlmssp_state->lm_resp = data_blob(NULL, 0);
765 gensec_ntlmssp_state->nt_resp = data_blob(NULL, 0);
766 gensec_ntlmssp_state->encrypted_session_key = data_blob(NULL, 0);
768 if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "128bit", true)) {
769 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
772 if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "56bit", true)) {
773 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
776 if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "keyexchange", true)) {
777 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
780 if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "alwayssign", true)) {
781 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
784 if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "ntlm2", true)) {
785 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
788 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
789 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
791 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
792 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
795 gensec_ntlmssp_state->auth_context = gensec_security->auth_context;
797 gensec_ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
798 gensec_ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
799 gensec_ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
800 gensec_ntlmssp_state->check_password = auth_ntlmssp_check_password;
801 gensec_ntlmssp_state->server_role = lp_server_role(gensec_security->settings->lp_ctx);