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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "auth/auth.h"
27 #include "auth/ntlmssp/ntlmssp.h"
28 #include "lib/crypto/crypto.h"
30 #include "system/filesys.h"
31 #include "libcli/auth/proto.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_CHAL_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->get_domain();
107 Andrew, please remove these totally bogus calls when you get time
109 static BOOL get_myfullname(char *my_name)
115 /* get my host name */
116 if (gethostname(hostname, sizeof(hostname)) == -1) {
117 DEBUG(0,("gethostname failed\n"));
121 /* Ensure null termination. */
122 hostname[sizeof(hostname)-1] = '\0';
125 fstrcpy(my_name, hostname);
129 static BOOL get_mydomname(char *my_domname)
134 /* arrgh! relies on full name in system */
137 /* get my host name */
138 if (gethostname(hostname, sizeof(hostname)) == -1) {
139 DEBUG(0,("gethostname failed\n"));
143 /* Ensure null termination. */
144 hostname[sizeof(hostname)-1] = '\0';
146 p = strchr_m(hostname, '.');
154 fstrcpy(my_domname, p);
162 * Next state function for the Negotiate packet
164 * @param gensec_security GENSEC state
165 * @param out_mem_ctx Memory context for *out
166 * @param in The request, as a DATA_BLOB. reply.data must be NULL
167 * @param out The reply, as an allocated DATA_BLOB, caller to free.
168 * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
171 NTSTATUS ntlmssp_server_negotiate(struct gensec_security *gensec_security,
172 TALLOC_CTX *out_mem_ctx,
173 const DATA_BLOB in, DATA_BLOB *out)
175 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
176 DATA_BLOB struct_blob;
177 fstring dnsname, dnsdomname;
178 uint32_t neg_flags = 0;
179 uint32_t ntlmssp_command, chal_flags;
180 const uint8_t *cryptkey;
181 const char *target_name;
183 /* parse the NTLMSSP packet */
185 file_save("ntlmssp_negotiate.dat", request.data, request.length);
189 if ((in.length < 16) || !msrpc_parse(out_mem_ctx, &in, "Cdd",
193 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse "
194 "NTLMSSP Negotiate of length %u:\n",
195 (unsigned int)in.length ));
196 dump_data(2, in.data, in.length);
197 return NT_STATUS_INVALID_PARAMETER;
199 debug_ntlmssp_flags(neg_flags);
202 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, neg_flags, gensec_ntlmssp_state->allow_lm_key);
204 /* Ask our caller what challenge they would like in the packet */
205 cryptkey = gensec_ntlmssp_state->get_challenge(gensec_ntlmssp_state);
207 /* Check if we may set the challenge */
208 if (!gensec_ntlmssp_state->may_set_challenge(gensec_ntlmssp_state)) {
209 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
212 /* The flags we send back are not just the negotiated flags,
213 * they are also 'what is in this packet'. Therfore, we
214 * operate on 'chal_flags' from here on
217 chal_flags = gensec_ntlmssp_state->neg_flags;
219 /* get the right name to fill in as 'target' */
220 target_name = ntlmssp_target_name(gensec_ntlmssp_state,
221 neg_flags, &chal_flags);
222 if (target_name == NULL)
223 return NT_STATUS_INVALID_PARAMETER;
225 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
226 gensec_ntlmssp_state->internal_chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
228 /* This should be a 'netbios domain -> DNS domain' mapping */
229 dnsdomname[0] = '\0';
230 get_mydomname(dnsdomname);
231 strlower_m(dnsdomname);
234 get_myfullname(dnsname);
236 /* This creates the 'blob' of names that appears at the end of the packet */
237 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
239 const char *target_name_dns = "";
240 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
241 target_name_dns = dnsdomname;
242 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
243 target_name_dns = dnsname;
246 msrpc_gen(out_mem_ctx,
247 &struct_blob, "aaaaa",
248 NTLMSSP_NAME_TYPE_DOMAIN, target_name,
249 NTLMSSP_NAME_TYPE_SERVER, gensec_ntlmssp_state->server_name,
250 NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
251 NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
254 struct_blob = data_blob(NULL, 0);
258 /* Marshel the packet in the right format, be it unicode or ASCII */
259 const char *gen_string;
260 if (gensec_ntlmssp_state->unicode) {
261 gen_string = "CdUdbddB";
263 gen_string = "CdAdbddB";
266 msrpc_gen(out_mem_ctx,
274 struct_blob.data, struct_blob.length);
277 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
279 return NT_STATUS_MORE_PROCESSING_REQUIRED;
283 * Next state function for the Authenticate packet
285 * @param gensec_ntlmssp_state NTLMSSP State
286 * @param request The request, as a DATA_BLOB
287 * @return Errors or NT_STATUS_OK.
290 static NTSTATUS ntlmssp_server_preauth(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
291 const DATA_BLOB request)
293 uint32_t ntlmssp_command, auth_flags;
296 uint8_t session_nonce_hash[16];
298 const char *parse_string;
301 char *workstation = NULL;
304 file_save("ntlmssp_auth.dat", request.data, request.length);
307 if (gensec_ntlmssp_state->unicode) {
308 parse_string = "CdBBUUUBd";
310 parse_string = "CdBBAAABd";
314 data_blob_free(&gensec_ntlmssp_state->lm_resp);
315 data_blob_free(&gensec_ntlmssp_state->nt_resp);
316 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
318 gensec_ntlmssp_state->user = NULL;
319 gensec_ntlmssp_state->domain = NULL;
320 gensec_ntlmssp_state->workstation = NULL;
322 /* now the NTLMSSP encoded auth hashes */
323 if (!msrpc_parse(gensec_ntlmssp_state,
324 &request, parse_string,
327 &gensec_ntlmssp_state->lm_resp,
328 &gensec_ntlmssp_state->nt_resp,
332 &gensec_ntlmssp_state->encrypted_session_key,
334 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
335 dump_data(10, request.data, request.length);
338 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
341 /* Try again with a shorter string (Win9X truncates this packet) */
342 if (gensec_ntlmssp_state->unicode) {
343 parse_string = "CdBBUUU";
345 parse_string = "CdBBAAA";
348 /* now the NTLMSSP encoded auth hashes */
349 if (!msrpc_parse(gensec_ntlmssp_state,
350 &request, parse_string,
353 &gensec_ntlmssp_state->lm_resp,
354 &gensec_ntlmssp_state->nt_resp,
358 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
359 dump_data(2, request.data, request.length);
361 return NT_STATUS_INVALID_PARAMETER;
366 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, auth_flags, gensec_ntlmssp_state->allow_lm_key);
368 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(gensec_ntlmssp_state, domain))) {
370 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
374 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(gensec_ntlmssp_state, user))) {
376 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
380 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state, workstation))) {
382 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
386 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
387 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));
390 file_save("nthash1.dat", &gensec_ntlmssp_state->nt_resp.data, &gensec_ntlmssp_state->nt_resp.length);
391 file_save("lmhash1.dat", &gensec_ntlmssp_state->lm_resp.data, &gensec_ntlmssp_state->lm_resp.length);
394 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
397 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
399 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
400 if (gensec_ntlmssp_state->nt_resp.length == 24 && gensec_ntlmssp_state->lm_resp.length == 24) {
401 struct MD5Context md5_session_nonce_ctx;
402 SMB_ASSERT(gensec_ntlmssp_state->internal_chal.data
403 && gensec_ntlmssp_state->internal_chal.length == 8);
405 gensec_ntlmssp_state->doing_ntlm2 = True;
407 memcpy(gensec_ntlmssp_state->crypt.ntlm2.session_nonce, gensec_ntlmssp_state->internal_chal.data, 8);
408 memcpy(&gensec_ntlmssp_state->crypt.ntlm2.session_nonce[8], gensec_ntlmssp_state->lm_resp.data, 8);
410 MD5Init(&md5_session_nonce_ctx);
411 MD5Update(&md5_session_nonce_ctx, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, 16);
412 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
414 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state,
415 session_nonce_hash, 8);
417 /* LM response is no longer useful, zero it out */
418 data_blob_free(&gensec_ntlmssp_state->lm_resp);
420 /* We changed the effective challenge - set it */
421 if (!NT_STATUS_IS_OK(nt_status =
422 gensec_ntlmssp_state->set_challenge(gensec_ntlmssp_state,
423 &gensec_ntlmssp_state->chal))) {
425 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
429 /* LM Key is incompatible... */
430 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
437 * Next state function for the Authenticate packet
438 * (after authentication - figures out the session keys etc)
440 * @param gensec_ntlmssp_state NTLMSSP State
441 * @return Errors or NT_STATUS_OK.
444 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
445 DATA_BLOB *user_session_key,
446 DATA_BLOB *lm_session_key)
448 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
450 DATA_BLOB session_key = data_blob(NULL, 0);
452 if (user_session_key)
453 dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
456 dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
458 /* Handle the different session key derivation for NTLM2 */
459 if (gensec_ntlmssp_state->doing_ntlm2) {
460 if (user_session_key && user_session_key->data && user_session_key->length == 16) {
461 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
462 hmac_md5(user_session_key->data, gensec_ntlmssp_state->crypt.ntlm2.session_nonce,
463 sizeof(gensec_ntlmssp_state->crypt.ntlm2.session_nonce), session_key.data);
464 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
465 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
468 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
469 session_key = data_blob(NULL, 0);
471 } else if ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
472 /* Ensure we can never get here on NTLMv2 */
473 && (gensec_ntlmssp_state->nt_resp.length == 0 || gensec_ntlmssp_state->nt_resp.length == 24)) {
475 if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
476 if (gensec_ntlmssp_state->lm_resp.data && gensec_ntlmssp_state->lm_resp.length == 24) {
477 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
478 SMBsesskeygen_lm_sess_key(lm_session_key->data, gensec_ntlmssp_state->lm_resp.data,
480 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
481 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
484 /* When there is no LM response, just use zeros */
485 static const uint8_t zeros[24];
486 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
487 SMBsesskeygen_lm_sess_key(zeros, zeros,
489 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
490 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
493 /* LM Key not selected */
494 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
496 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
497 session_key = data_blob(NULL, 0);
500 } else if (user_session_key && user_session_key->data) {
501 session_key = *user_session_key;
502 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
503 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
505 /* LM Key not selected */
506 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
508 } else if (lm_session_key && lm_session_key->data) {
509 /* Very weird to have LM key, but no user session key, but anyway.. */
510 session_key = *lm_session_key;
511 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
512 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
514 /* LM Key not selected */
515 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
518 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
519 session_key = data_blob(NULL, 0);
521 /* LM Key not selected */
522 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
525 /* With KEY_EXCH, the client supplies the proposed session key,
526 but encrypts it with the long-term key */
527 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
528 if (!gensec_ntlmssp_state->encrypted_session_key.data
529 || gensec_ntlmssp_state->encrypted_session_key.length != 16) {
530 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
531 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
532 (unsigned)gensec_ntlmssp_state->encrypted_session_key.length));
533 return NT_STATUS_INVALID_PARAMETER;
534 } else if (!session_key.data || session_key.length != 16) {
535 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
536 (unsigned)session_key.length));
537 gensec_ntlmssp_state->session_key = session_key;
539 dump_data_pw("KEY_EXCH session key (enc):\n",
540 gensec_ntlmssp_state->encrypted_session_key.data,
541 gensec_ntlmssp_state->encrypted_session_key.length);
542 arcfour_crypt(gensec_ntlmssp_state->encrypted_session_key.data,
544 gensec_ntlmssp_state->encrypted_session_key.length);
545 gensec_ntlmssp_state->session_key = data_blob_talloc(gensec_ntlmssp_state,
546 gensec_ntlmssp_state->encrypted_session_key.data,
547 gensec_ntlmssp_state->encrypted_session_key.length);
548 dump_data_pw("KEY_EXCH session key:\n", gensec_ntlmssp_state->encrypted_session_key.data,
549 gensec_ntlmssp_state->encrypted_session_key.length);
552 gensec_ntlmssp_state->session_key = session_key;
555 /* keep the session key around on the new context */
556 talloc_steal(gensec_ntlmssp_state, session_key.data);
558 if ((gensec_security->want_features & GENSEC_FEATURE_SIGN)
559 || (gensec_security->want_features & GENSEC_FEATURE_SEAL)) {
560 nt_status = ntlmssp_sign_init(gensec_ntlmssp_state);
562 nt_status = NT_STATUS_OK;
565 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
567 /* allow arbitarily many authentications, but watch that this will cause a
568 memory leak, until the gensec_ntlmssp_state is shutdown
571 if (gensec_ntlmssp_state->server_multiple_authentications) {
572 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
574 gensec_ntlmssp_state->expected_state = NTLMSSP_DONE;
582 * Next state function for the Authenticate packet
584 * @param gensec_security GENSEC state
585 * @param out_mem_ctx Memory context for *out
586 * @param in The request, as a DATA_BLOB. reply.data must be NULL
587 * @param out The reply, as an allocated DATA_BLOB, caller to free.
588 * @return Errors or NT_STATUS_OK if authentication sucessful
591 NTSTATUS ntlmssp_server_auth(struct gensec_security *gensec_security,
592 TALLOC_CTX *out_mem_ctx,
593 const DATA_BLOB in, DATA_BLOB *out)
595 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
596 DATA_BLOB user_session_key = data_blob(NULL, 0);
597 DATA_BLOB lm_session_key = data_blob(NULL, 0);
600 TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
602 return NT_STATUS_NO_MEMORY;
605 /* zero the outbound NTLMSSP packet */
606 *out = data_blob_talloc(out_mem_ctx, NULL, 0);
608 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(gensec_ntlmssp_state, in))) {
609 talloc_free(mem_ctx);
614 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
615 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
616 * smb.conf file) and no NTLMv2 response was sent then the password check
617 * will fail here. JRA.
620 /* Finally, actually ask if the password is OK */
622 if (!NT_STATUS_IS_OK(nt_status = gensec_ntlmssp_state->check_password(gensec_ntlmssp_state, mem_ctx,
623 &user_session_key, &lm_session_key))) {
624 talloc_free(mem_ctx);
628 if (gensec_security->want_features
629 & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL|GENSEC_FEATURE_SESSION_KEY)) {
630 nt_status = ntlmssp_server_postauth(gensec_security, &user_session_key, &lm_session_key);
631 talloc_free(mem_ctx);
634 gensec_ntlmssp_state->session_key = data_blob(NULL, 0);
635 talloc_free(mem_ctx);
641 * Return the challenge as determined by the authentication subsystem
642 * @return an 8 byte random challenge
645 static const uint8_t *auth_ntlmssp_get_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
650 status = auth_get_challenge(gensec_ntlmssp_state->auth_context, &chal);
651 if (!NT_STATUS_IS_OK(status)) {
659 * Some authentication methods 'fix' the challenge, so we may not be able to set it
661 * @return If the effective challenge used by the auth subsystem may be modified
663 static BOOL auth_ntlmssp_may_set_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
665 return auth_challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
669 * NTLM2 authentication modifies the effective challenge,
670 * @param challenge The new challenge value
672 static NTSTATUS auth_ntlmssp_set_challenge(struct gensec_ntlmssp_state *gensec_ntlmssp_state, DATA_BLOB *challenge)
675 struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
678 if (challenge->length != 8) {
679 return NT_STATUS_INVALID_PARAMETER;
682 chal = challenge->data;
684 nt_status = auth_context_set_challenge(auth_context, chal, "NTLMSSP callback (NTLM2)");
690 * Check the password on an NTLMSSP login.
692 * Return the session keys used on the connection.
695 static NTSTATUS auth_ntlmssp_check_password(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
697 DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
700 struct auth_usersupplied_info *user_info = talloc(mem_ctx, struct auth_usersupplied_info);
702 return NT_STATUS_NO_MEMORY;
705 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
706 user_info->flags = 0;
707 user_info->mapped_state = False;
708 user_info->client.account_name = gensec_ntlmssp_state->user;
709 user_info->client.domain_name = gensec_ntlmssp_state->domain;
710 user_info->workstation_name = gensec_ntlmssp_state->workstation;
711 user_info->remote_host = gensec_get_peer_addr(gensec_ntlmssp_state->gensec_security);
713 user_info->password_state = AUTH_PASSWORD_RESPONSE;
714 user_info->password.response.lanman = gensec_ntlmssp_state->lm_resp;
715 user_info->password.response.lanman.data = talloc_steal(user_info, gensec_ntlmssp_state->lm_resp.data);
716 user_info->password.response.nt = gensec_ntlmssp_state->nt_resp;
717 user_info->password.response.nt.data = talloc_steal(user_info, gensec_ntlmssp_state->nt_resp.data);
719 nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, mem_ctx,
720 user_info, &gensec_ntlmssp_state->server_info);
721 talloc_free(user_info);
722 NT_STATUS_NOT_OK_RETURN(nt_status);
724 talloc_steal(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info);
726 if (gensec_ntlmssp_state->server_info->user_session_key.length) {
727 DEBUG(10, ("Got NT session key of length %u\n",
728 (unsigned)gensec_ntlmssp_state->server_info->user_session_key.length));
729 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->user_session_key.data)) {
730 return NT_STATUS_NO_MEMORY;
733 *user_session_key = gensec_ntlmssp_state->server_info->user_session_key;
735 if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
736 DEBUG(10, ("Got LM session key of length %u\n",
737 (unsigned)gensec_ntlmssp_state->server_info->lm_session_key.length));
738 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->lm_session_key.data)) {
739 return NT_STATUS_NO_MEMORY;
742 *lm_session_key = gensec_ntlmssp_state->server_info->lm_session_key;
748 * Return the credentials of a logged on user, including session keys
751 * Only valid after a successful authentication
753 * May only be called once per authentication.
757 NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
758 struct auth_session_info **session_info)
761 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
763 nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info, session_info);
764 NT_STATUS_NOT_OK_RETURN(nt_status);
766 (*session_info)->session_key = data_blob_talloc(*session_info,
767 gensec_ntlmssp_state->session_key.data,
768 gensec_ntlmssp_state->session_key.length);
774 * Start NTLMSSP on the server side
777 NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
780 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
782 nt_status = gensec_ntlmssp_start(gensec_security);
783 NT_STATUS_NOT_OK_RETURN(nt_status);
785 gensec_ntlmssp_state = gensec_security->private_data;
787 gensec_ntlmssp_state->role = NTLMSSP_SERVER;
789 gensec_ntlmssp_state->workstation = NULL;
790 gensec_ntlmssp_state->server_name = lp_netbios_name();
792 gensec_ntlmssp_state->get_domain = lp_workgroup;
794 gensec_ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
796 gensec_ntlmssp_state->allow_lm_key = (lp_lanman_auth()
797 && lp_parm_bool(-1, "ntlmssp_server", "allow_lm_key", False));
799 gensec_ntlmssp_state->server_multiple_authentications = False;
801 gensec_ntlmssp_state->neg_flags =
802 NTLMSSP_NEGOTIATE_NTLM;
804 gensec_ntlmssp_state->lm_resp = data_blob(NULL, 0);
805 gensec_ntlmssp_state->nt_resp = data_blob(NULL, 0);
806 gensec_ntlmssp_state->encrypted_session_key = data_blob(NULL, 0);
808 if (lp_parm_bool(-1, "ntlmssp_server", "128bit", True)) {
809 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
812 if (lp_parm_bool(-1, "ntlmssp_server", "keyexchange", True)) {
813 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
816 if (lp_parm_bool(-1, "ntlmssp_server", "ntlm2", True)) {
817 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
820 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
821 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
823 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
824 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
827 nt_status = auth_context_create(gensec_ntlmssp_state, lp_auth_methods(),
828 &gensec_ntlmssp_state->auth_context,
829 gensec_security->event_ctx);
830 NT_STATUS_NOT_OK_RETURN(nt_status);
832 gensec_ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
833 gensec_ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
834 gensec_ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
835 gensec_ntlmssp_state->check_password = auth_ntlmssp_check_password;
836 gensec_ntlmssp_state->server_role = lp_server_role();