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"
33 * Set a username on an NTLMSSP context - ensures it is talloc()ed
37 static NTSTATUS ntlmssp_set_username(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *user)
40 /* it should be at least "" */
41 DEBUG(1, ("NTLMSSP failed to set username - cannot accept NULL username\n"));
42 return NT_STATUS_INVALID_PARAMETER;
44 gensec_ntlmssp_state->user = talloc_strdup(gensec_ntlmssp_state, user);
45 if (!gensec_ntlmssp_state->user) {
46 return NT_STATUS_NO_MEMORY;
52 * Set a domain on an NTLMSSP context - ensures it is talloc()ed
55 static NTSTATUS ntlmssp_set_domain(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *domain)
57 gensec_ntlmssp_state->domain = talloc_strdup(gensec_ntlmssp_state, domain);
58 if (!gensec_ntlmssp_state->domain) {
59 return NT_STATUS_NO_MEMORY;
65 * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
68 static NTSTATUS ntlmssp_set_workstation(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *workstation)
70 gensec_ntlmssp_state->workstation = talloc_strdup(gensec_ntlmssp_state, workstation);
71 if (!gensec_ntlmssp_state->workstation) {
72 return NT_STATUS_NO_MEMORY;
78 * Determine correct target name flags for reply, given server role
79 * and negotiated flags
81 * @param gensec_ntlmssp_state NTLMSSP State
82 * @param neg_flags The flags from the packet
83 * @param chal_flags The flags to be set in the reply packet
84 * @return The 'target name' string.
87 static const char *ntlmssp_target_name(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
88 uint32_t neg_flags, uint32_t *chal_flags)
90 if (neg_flags & NTLMSSP_REQUEST_TARGET) {
91 *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
92 *chal_flags |= NTLMSSP_REQUEST_TARGET;
93 if (gensec_ntlmssp_state->server_role == ROLE_STANDALONE) {
94 *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
95 return gensec_ntlmssp_state->server_name;
97 *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
98 return gensec_ntlmssp_state->get_domain();
106 Andrew, please remove these totally bogus calls when you get time
108 static BOOL get_myfullname(char *my_name)
114 /* get my host name */
115 if (gethostname(hostname, sizeof(hostname)) == -1) {
116 DEBUG(0,("gethostname failed\n"));
120 /* Ensure null termination. */
121 hostname[sizeof(hostname)-1] = '\0';
124 fstrcpy(my_name, hostname);
128 static BOOL get_mydomname(char *my_domname)
133 /* arrgh! relies on full name in system */
136 /* get my host name */
137 if (gethostname(hostname, sizeof(hostname)) == -1) {
138 DEBUG(0,("gethostname failed\n"));
142 /* Ensure null termination. */
143 hostname[sizeof(hostname)-1] = '\0';
145 p = strchr_m(hostname, '.');
153 fstrcpy(my_domname, p);
161 * Next state function for the Negotiate packet
163 * @param gensec_security GENSEC state
164 * @param out_mem_ctx Memory context for *out
165 * @param in The request, as a DATA_BLOB. reply.data must be NULL
166 * @param out The reply, as an allocated DATA_BLOB, caller to free.
167 * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
170 NTSTATUS ntlmssp_server_negotiate(struct gensec_security *gensec_security,
171 TALLOC_CTX *out_mem_ctx,
172 const DATA_BLOB in, DATA_BLOB *out)
174 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
175 DATA_BLOB struct_blob;
176 fstring dnsname, dnsdomname;
177 uint32_t neg_flags = 0;
178 uint32_t ntlmssp_command, chal_flags;
179 const uint8_t *cryptkey;
180 const char *target_name;
182 /* parse the NTLMSSP packet */
184 file_save("ntlmssp_negotiate.dat", request.data, request.length);
188 if ((in.length < 16) || !msrpc_parse(out_mem_ctx, &in, "Cdd",
192 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse "
193 "NTLMSSP Negotiate of length %u:\n",
194 (unsigned int)in.length ));
195 dump_data(2, in.data, in.length);
196 return NT_STATUS_INVALID_PARAMETER;
198 debug_ntlmssp_flags(neg_flags);
201 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, neg_flags, gensec_ntlmssp_state->allow_lm_key);
203 /* Ask our caller what challenge they would like in the packet */
204 cryptkey = gensec_ntlmssp_state->get_challenge(gensec_ntlmssp_state);
206 /* Check if we may set the challenge */
207 if (!gensec_ntlmssp_state->may_set_challenge(gensec_ntlmssp_state)) {
208 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
211 /* The flags we send back are not just the negotiated flags,
212 * they are also 'what is in this packet'. Therfore, we
213 * operate on 'chal_flags' from here on
216 chal_flags = gensec_ntlmssp_state->neg_flags;
218 /* get the right name to fill in as 'target' */
219 target_name = ntlmssp_target_name(gensec_ntlmssp_state,
220 neg_flags, &chal_flags);
221 if (target_name == NULL)
222 return NT_STATUS_INVALID_PARAMETER;
224 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
225 gensec_ntlmssp_state->internal_chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
227 /* This should be a 'netbios domain -> DNS domain' mapping */
228 dnsdomname[0] = '\0';
229 get_mydomname(dnsdomname);
230 strlower_m(dnsdomname);
233 get_myfullname(dnsname);
235 /* This creates the 'blob' of names that appears at the end of the packet */
236 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
238 const char *target_name_dns = "";
239 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
240 target_name_dns = dnsdomname;
241 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
242 target_name_dns = dnsname;
245 msrpc_gen(out_mem_ctx,
246 &struct_blob, "aaaaa",
247 NTLMSSP_NAME_TYPE_DOMAIN, target_name,
248 NTLMSSP_NAME_TYPE_SERVER, gensec_ntlmssp_state->server_name,
249 NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
250 NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
253 struct_blob = data_blob(NULL, 0);
257 /* Marshel the packet in the right format, be it unicode or ASCII */
258 const char *gen_string;
259 if (gensec_ntlmssp_state->unicode) {
260 gen_string = "CdUdbddB";
262 gen_string = "CdAdbddB";
265 msrpc_gen(out_mem_ctx,
273 struct_blob.data, struct_blob.length);
276 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
278 return NT_STATUS_MORE_PROCESSING_REQUIRED;
282 * Next state function for the Authenticate packet
284 * @param gensec_ntlmssp_state NTLMSSP State
285 * @param request The request, as a DATA_BLOB
286 * @return Errors or NT_STATUS_OK.
289 static NTSTATUS ntlmssp_server_preauth(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
290 const DATA_BLOB request)
292 uint32_t ntlmssp_command, auth_flags;
295 uint8_t session_nonce_hash[16];
297 const char *parse_string;
300 char *workstation = NULL;
303 file_save("ntlmssp_auth.dat", request.data, request.length);
306 if (gensec_ntlmssp_state->unicode) {
307 parse_string = "CdBBUUUBd";
309 parse_string = "CdBBAAABd";
313 data_blob_free(&gensec_ntlmssp_state->lm_resp);
314 data_blob_free(&gensec_ntlmssp_state->nt_resp);
315 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
317 gensec_ntlmssp_state->user = NULL;
318 gensec_ntlmssp_state->domain = NULL;
319 gensec_ntlmssp_state->workstation = NULL;
321 /* now the NTLMSSP encoded auth hashes */
322 if (!msrpc_parse(gensec_ntlmssp_state,
323 &request, parse_string,
326 &gensec_ntlmssp_state->lm_resp,
327 &gensec_ntlmssp_state->nt_resp,
331 &gensec_ntlmssp_state->encrypted_session_key,
333 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
334 dump_data(10, request.data, request.length);
337 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
340 /* Try again with a shorter string (Win9X truncates this packet) */
341 if (gensec_ntlmssp_state->unicode) {
342 parse_string = "CdBBUUU";
344 parse_string = "CdBBAAA";
347 /* now the NTLMSSP encoded auth hashes */
348 if (!msrpc_parse(gensec_ntlmssp_state,
349 &request, parse_string,
352 &gensec_ntlmssp_state->lm_resp,
353 &gensec_ntlmssp_state->nt_resp,
357 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
358 dump_data(2, request.data, request.length);
360 return NT_STATUS_INVALID_PARAMETER;
365 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, auth_flags, gensec_ntlmssp_state->allow_lm_key);
367 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(gensec_ntlmssp_state, domain))) {
369 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
373 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(gensec_ntlmssp_state, user))) {
375 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
379 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state, workstation))) {
381 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
385 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
386 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));
389 file_save("nthash1.dat", &gensec_ntlmssp_state->nt_resp.data, &gensec_ntlmssp_state->nt_resp.length);
390 file_save("lmhash1.dat", &gensec_ntlmssp_state->lm_resp.data, &gensec_ntlmssp_state->lm_resp.length);
393 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
396 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
398 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
399 if (gensec_ntlmssp_state->nt_resp.length == 24 && gensec_ntlmssp_state->lm_resp.length == 24) {
400 struct MD5Context md5_session_nonce_ctx;
401 SMB_ASSERT(gensec_ntlmssp_state->internal_chal.data
402 && gensec_ntlmssp_state->internal_chal.length == 8);
404 gensec_ntlmssp_state->doing_ntlm2 = True;
406 memcpy(gensec_ntlmssp_state->crypt.ntlm2.session_nonce, gensec_ntlmssp_state->internal_chal.data, 8);
407 memcpy(&gensec_ntlmssp_state->crypt.ntlm2.session_nonce[8], gensec_ntlmssp_state->lm_resp.data, 8);
409 MD5Init(&md5_session_nonce_ctx);
410 MD5Update(&md5_session_nonce_ctx, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, 16);
411 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
413 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state,
414 session_nonce_hash, 8);
416 /* LM response is no longer useful, zero it out */
417 data_blob_free(&gensec_ntlmssp_state->lm_resp);
419 /* We changed the effective challenge - set it */
420 if (!NT_STATUS_IS_OK(nt_status =
421 gensec_ntlmssp_state->set_challenge(gensec_ntlmssp_state,
422 &gensec_ntlmssp_state->chal))) {
424 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
428 /* LM Key is incompatible... */
429 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
436 * Next state function for the Authenticate packet
437 * (after authentication - figures out the session keys etc)
439 * @param gensec_ntlmssp_state NTLMSSP State
440 * @return Errors or NT_STATUS_OK.
443 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
444 DATA_BLOB *user_session_key,
445 DATA_BLOB *lm_session_key)
447 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
449 DATA_BLOB session_key = data_blob(NULL, 0);
451 if (user_session_key)
452 dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
455 dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
457 /* Handle the different session key derivation for NTLM2 */
458 if (gensec_ntlmssp_state->doing_ntlm2) {
459 if (user_session_key && user_session_key->data && user_session_key->length == 16) {
460 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
461 hmac_md5(user_session_key->data, gensec_ntlmssp_state->crypt.ntlm2.session_nonce,
462 sizeof(gensec_ntlmssp_state->crypt.ntlm2.session_nonce), session_key.data);
463 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
464 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
467 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
468 session_key = data_blob(NULL, 0);
470 } else if ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
471 /* Ensure we can never get here on NTLMv2 */
472 && (gensec_ntlmssp_state->nt_resp.length == 0 || gensec_ntlmssp_state->nt_resp.length == 24)) {
474 if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
475 if (gensec_ntlmssp_state->lm_resp.data && gensec_ntlmssp_state->lm_resp.length == 24) {
476 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
477 SMBsesskeygen_lm_sess_key(lm_session_key->data, gensec_ntlmssp_state->lm_resp.data,
479 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
480 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
483 /* When there is no LM response, just use zeros */
484 static const uint8_t zeros[24];
485 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
486 SMBsesskeygen_lm_sess_key(zeros, zeros,
488 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
489 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
492 /* LM Key not selected */
493 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
495 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
496 session_key = data_blob(NULL, 0);
499 } else if (user_session_key && user_session_key->data) {
500 session_key = *user_session_key;
501 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
502 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
504 /* LM Key not selected */
505 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
507 } else if (lm_session_key && lm_session_key->data) {
508 /* Very weird to have LM key, but no user session key, but anyway.. */
509 session_key = *lm_session_key;
510 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
511 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
513 /* LM Key not selected */
514 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
517 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
518 session_key = data_blob(NULL, 0);
520 /* LM Key not selected */
521 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
524 /* With KEY_EXCH, the client supplies the proposed session key,
525 but encrypts it with the long-term key */
526 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
527 if (!gensec_ntlmssp_state->encrypted_session_key.data
528 || gensec_ntlmssp_state->encrypted_session_key.length != 16) {
529 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
530 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
531 (unsigned)gensec_ntlmssp_state->encrypted_session_key.length));
532 return NT_STATUS_INVALID_PARAMETER;
533 } else if (!session_key.data || session_key.length != 16) {
534 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
535 (unsigned)session_key.length));
536 gensec_ntlmssp_state->session_key = session_key;
538 dump_data_pw("KEY_EXCH session key (enc):\n",
539 gensec_ntlmssp_state->encrypted_session_key.data,
540 gensec_ntlmssp_state->encrypted_session_key.length);
541 arcfour_crypt(gensec_ntlmssp_state->encrypted_session_key.data,
543 gensec_ntlmssp_state->encrypted_session_key.length);
544 gensec_ntlmssp_state->session_key = data_blob_talloc(gensec_ntlmssp_state,
545 gensec_ntlmssp_state->encrypted_session_key.data,
546 gensec_ntlmssp_state->encrypted_session_key.length);
547 dump_data_pw("KEY_EXCH session key:\n", gensec_ntlmssp_state->encrypted_session_key.data,
548 gensec_ntlmssp_state->encrypted_session_key.length);
551 gensec_ntlmssp_state->session_key = session_key;
554 /* keep the session key around on the new context */
555 talloc_steal(gensec_ntlmssp_state, session_key.data);
557 if ((gensec_security->want_features & GENSEC_FEATURE_SIGN)
558 || (gensec_security->want_features & GENSEC_FEATURE_SEAL)) {
559 nt_status = ntlmssp_sign_init(gensec_ntlmssp_state);
561 nt_status = NT_STATUS_OK;
564 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
566 /* allow arbitarily many authentications, but watch that this will cause a
567 memory leak, until the gensec_ntlmssp_state is shutdown
570 if (gensec_ntlmssp_state->server_multiple_authentications) {
571 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
573 gensec_ntlmssp_state->expected_state = NTLMSSP_DONE;
581 * Next state function for the Authenticate packet
583 * @param gensec_security GENSEC state
584 * @param out_mem_ctx Memory context for *out
585 * @param in The request, as a DATA_BLOB. reply.data must be NULL
586 * @param out The reply, as an allocated DATA_BLOB, caller to free.
587 * @return Errors or NT_STATUS_OK if authentication sucessful
590 NTSTATUS ntlmssp_server_auth(struct gensec_security *gensec_security,
591 TALLOC_CTX *out_mem_ctx,
592 const DATA_BLOB in, DATA_BLOB *out)
594 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
595 DATA_BLOB user_session_key = data_blob(NULL, 0);
596 DATA_BLOB lm_session_key = data_blob(NULL, 0);
599 TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
601 return NT_STATUS_NO_MEMORY;
604 /* zero the outbound NTLMSSP packet */
605 *out = data_blob_talloc(out_mem_ctx, NULL, 0);
607 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(gensec_ntlmssp_state, in))) {
608 talloc_free(mem_ctx);
613 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
614 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
615 * smb.conf file) and no NTLMv2 response was sent then the password check
616 * will fail here. JRA.
619 /* Finally, actually ask if the password is OK */
621 if (!NT_STATUS_IS_OK(nt_status = gensec_ntlmssp_state->check_password(gensec_ntlmssp_state, mem_ctx,
622 &user_session_key, &lm_session_key))) {
623 talloc_free(mem_ctx);
627 if (gensec_security->want_features
628 & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL|GENSEC_FEATURE_SESSION_KEY)) {
629 nt_status = ntlmssp_server_postauth(gensec_security, &user_session_key, &lm_session_key);
630 talloc_free(mem_ctx);
633 gensec_ntlmssp_state->session_key = data_blob(NULL, 0);
634 talloc_free(mem_ctx);
640 * Return the challenge as determined by the authentication subsystem
641 * @return an 8 byte random challenge
644 static const uint8_t *auth_ntlmssp_get_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
649 status = auth_get_challenge(gensec_ntlmssp_state->auth_context, &chal);
650 if (!NT_STATUS_IS_OK(status)) {
658 * Some authentication methods 'fix' the challenge, so we may not be able to set it
660 * @return If the effective challenge used by the auth subsystem may be modified
662 static BOOL auth_ntlmssp_may_set_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
664 return auth_challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
668 * NTLM2 authentication modifies the effective challenge,
669 * @param challenge The new challenge value
671 static NTSTATUS auth_ntlmssp_set_challenge(struct gensec_ntlmssp_state *gensec_ntlmssp_state, DATA_BLOB *challenge)
674 struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
677 if (challenge->length != 8) {
678 return NT_STATUS_INVALID_PARAMETER;
681 chal = challenge->data;
683 nt_status = auth_context_set_challenge(auth_context, chal, "NTLMSSP callback (NTLM2)");
689 * Check the password on an NTLMSSP login.
691 * Return the session keys used on the connection.
694 static NTSTATUS auth_ntlmssp_check_password(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
696 DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
699 struct auth_usersupplied_info *user_info = talloc(mem_ctx, struct auth_usersupplied_info);
701 return NT_STATUS_NO_MEMORY;
704 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
705 user_info->flags = 0;
706 user_info->mapped_state = False;
707 user_info->client.account_name = gensec_ntlmssp_state->user;
708 user_info->client.domain_name = gensec_ntlmssp_state->domain;
709 user_info->workstation_name = gensec_ntlmssp_state->workstation;
710 user_info->remote_host = gensec_get_peer_addr(gensec_ntlmssp_state->gensec_security);
712 user_info->password_state = AUTH_PASSWORD_RESPONSE;
713 user_info->password.response.lanman = gensec_ntlmssp_state->lm_resp;
714 user_info->password.response.lanman.data = talloc_steal(user_info, gensec_ntlmssp_state->lm_resp.data);
715 user_info->password.response.nt = gensec_ntlmssp_state->nt_resp;
716 user_info->password.response.nt.data = talloc_steal(user_info, gensec_ntlmssp_state->nt_resp.data);
718 nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, mem_ctx,
719 user_info, &gensec_ntlmssp_state->server_info);
720 talloc_free(user_info);
721 NT_STATUS_NOT_OK_RETURN(nt_status);
723 talloc_steal(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info);
725 if (gensec_ntlmssp_state->server_info->user_session_key.length) {
726 DEBUG(10, ("Got NT session key of length %u\n",
727 (unsigned)gensec_ntlmssp_state->server_info->user_session_key.length));
728 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->user_session_key.data)) {
729 return NT_STATUS_NO_MEMORY;
732 *user_session_key = gensec_ntlmssp_state->server_info->user_session_key;
734 if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
735 DEBUG(10, ("Got LM session key of length %u\n",
736 (unsigned)gensec_ntlmssp_state->server_info->lm_session_key.length));
737 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->lm_session_key.data)) {
738 return NT_STATUS_NO_MEMORY;
741 *lm_session_key = gensec_ntlmssp_state->server_info->lm_session_key;
747 * Return the credentials of a logged on user, including session keys
750 * Only valid after a successful authentication
752 * May only be called once per authentication.
756 NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
757 struct auth_session_info **session_info)
760 struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
762 nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info, session_info);
763 NT_STATUS_NOT_OK_RETURN(nt_status);
765 (*session_info)->session_key = data_blob_talloc(*session_info,
766 gensec_ntlmssp_state->session_key.data,
767 gensec_ntlmssp_state->session_key.length);
773 * Start NTLMSSP on the server side
776 NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
779 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
781 nt_status = gensec_ntlmssp_start(gensec_security);
782 NT_STATUS_NOT_OK_RETURN(nt_status);
784 gensec_ntlmssp_state = gensec_security->private_data;
786 gensec_ntlmssp_state->role = NTLMSSP_SERVER;
788 gensec_ntlmssp_state->workstation = NULL;
789 gensec_ntlmssp_state->server_name = lp_netbios_name();
791 gensec_ntlmssp_state->get_domain = lp_workgroup;
793 gensec_ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
795 gensec_ntlmssp_state->allow_lm_key = (lp_lanman_auth()
796 && lp_parm_bool(-1, "ntlmssp_server", "allow_lm_key", False));
798 gensec_ntlmssp_state->server_multiple_authentications = False;
800 gensec_ntlmssp_state->neg_flags =
801 NTLMSSP_NEGOTIATE_NTLM;
803 gensec_ntlmssp_state->lm_resp = data_blob(NULL, 0);
804 gensec_ntlmssp_state->nt_resp = data_blob(NULL, 0);
805 gensec_ntlmssp_state->encrypted_session_key = data_blob(NULL, 0);
807 if (lp_parm_bool(-1, "ntlmssp_server", "128bit", True)) {
808 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
811 if (lp_parm_bool(-1, "ntlmssp_server", "keyexchange", True)) {
812 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
815 if (lp_parm_bool(-1, "ntlmssp_server", "ntlm2", True)) {
816 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
819 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
820 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
822 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
823 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
826 nt_status = auth_context_create(gensec_ntlmssp_state, lp_auth_methods(),
827 &gensec_ntlmssp_state->auth_context,
828 gensec_security->event_ctx);
829 NT_STATUS_NOT_OK_RETURN(nt_status);
831 gensec_ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
832 gensec_ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
833 gensec_ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
834 gensec_ntlmssp_state->check_password = auth_ntlmssp_check_password;
835 gensec_ntlmssp_state->server_role = lp_server_role();