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 "auth/ntlmssp/ntlmssp.h"
26 #include "auth/ntlmssp/msrpc_parse.h"
27 #include "lib/crypto/crypto.h"
29 #include "system/filesys.h"
30 #include "libcli/auth/libcli_auth.h"
31 #include "auth/credentials/credentials.h"
32 #include "auth/gensec/gensec.h"
33 #include "auth/auth.h"
36 * Set a username on an NTLMSSP context - ensures it is talloc()ed
40 static NTSTATUS ntlmssp_set_username(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *user)
43 /* it should be at least "" */
44 DEBUG(1, ("NTLMSSP failed to set username - cannot accept NULL username\n"));
45 return NT_STATUS_INVALID_PARAMETER;
47 gensec_ntlmssp_state->user = talloc_strdup(gensec_ntlmssp_state, user);
48 if (!gensec_ntlmssp_state->user) {
49 return NT_STATUS_NO_MEMORY;
55 * Set a domain on an NTLMSSP context - ensures it is talloc()ed
58 static NTSTATUS ntlmssp_set_domain(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *domain)
60 gensec_ntlmssp_state->domain = talloc_strdup(gensec_ntlmssp_state, domain);
61 if (!gensec_ntlmssp_state->domain) {
62 return NT_STATUS_NO_MEMORY;
68 * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
71 static NTSTATUS ntlmssp_set_workstation(struct gensec_ntlmssp_state *gensec_ntlmssp_state, const char *workstation)
73 gensec_ntlmssp_state->workstation = talloc_strdup(gensec_ntlmssp_state, workstation);
74 if (!gensec_ntlmssp_state->workstation) {
75 return NT_STATUS_NO_MEMORY;
81 * Determine correct target name flags for reply, given server role
82 * and negotiated flags
84 * @param gensec_ntlmssp_state NTLMSSP State
85 * @param neg_flags The flags from the packet
86 * @param chal_flags The flags to be set in the reply packet
87 * @return The 'target name' string.
90 static const char *ntlmssp_target_name(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
91 uint32_t neg_flags, uint32_t *chal_flags)
93 if (neg_flags & NTLMSSP_REQUEST_TARGET) {
94 *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
95 *chal_flags |= NTLMSSP_REQUEST_TARGET;
96 if (gensec_ntlmssp_state->server_role == ROLE_STANDALONE) {
97 *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
98 return gensec_ntlmssp_state->server_name;
100 *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
101 return gensec_ntlmssp_state->get_domain();
109 Andrew, please remove these totally bogus calls when you get time
111 static BOOL get_myfullname(char *my_name)
117 /* get my host name */
118 if (gethostname(hostname, sizeof(hostname)) == -1) {
119 DEBUG(0,("gethostname failed\n"));
123 /* Ensure null termination. */
124 hostname[sizeof(hostname)-1] = '\0';
127 fstrcpy(my_name, hostname);
131 static BOOL get_mydomname(char *my_domname)
136 /* arrgh! relies on full name in system */
139 /* get my host name */
140 if (gethostname(hostname, sizeof(hostname)) == -1) {
141 DEBUG(0,("gethostname failed\n"));
145 /* Ensure null termination. */
146 hostname[sizeof(hostname)-1] = '\0';
148 p = strchr_m(hostname, '.');
156 fstrcpy(my_domname, p);
164 * Next state function for the Negotiate packet
166 * @param gensec_security GENSEC state
167 * @param out_mem_ctx Memory context for *out
168 * @param in The request, as a DATA_BLOB. reply.data must be NULL
169 * @param out The reply, as an allocated DATA_BLOB, caller to free.
170 * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
173 NTSTATUS ntlmssp_server_negotiate(struct gensec_security *gensec_security,
174 TALLOC_CTX *out_mem_ctx,
175 const DATA_BLOB in, DATA_BLOB *out)
177 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
178 DATA_BLOB struct_blob;
179 fstring dnsname, dnsdomname;
180 uint32_t neg_flags = 0;
181 uint32_t ntlmssp_command, chal_flags;
182 const uint8_t *cryptkey;
183 const char *target_name;
185 /* parse the NTLMSSP packet */
187 file_save("ntlmssp_negotiate.dat", request.data, request.length);
191 if ((in.length < 16) || !msrpc_parse(out_mem_ctx, &in, "Cdd",
195 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse "
196 "NTLMSSP Negotiate of length %u:\n",
197 (unsigned int)in.length ));
198 dump_data(2, in.data, in.length);
199 return NT_STATUS_INVALID_PARAMETER;
201 debug_ntlmssp_flags(neg_flags);
204 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, neg_flags, gensec_ntlmssp_state->allow_lm_key);
206 /* Ask our caller what challenge they would like in the packet */
207 cryptkey = gensec_ntlmssp_state->get_challenge(gensec_ntlmssp_state);
209 /* Check if we may set the challenge */
210 if (!gensec_ntlmssp_state->may_set_challenge(gensec_ntlmssp_state)) {
211 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
214 /* The flags we send back are not just the negotiated flags,
215 * they are also 'what is in this packet'. Therfore, we
216 * operate on 'chal_flags' from here on
219 chal_flags = gensec_ntlmssp_state->neg_flags;
221 /* get the right name to fill in as 'target' */
222 target_name = ntlmssp_target_name(gensec_ntlmssp_state,
223 neg_flags, &chal_flags);
224 if (target_name == NULL)
225 return NT_STATUS_INVALID_PARAMETER;
227 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
228 gensec_ntlmssp_state->internal_chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
230 /* This should be a 'netbios domain -> DNS domain' mapping */
231 dnsdomname[0] = '\0';
232 get_mydomname(dnsdomname);
233 strlower_m(dnsdomname);
236 get_myfullname(dnsname);
238 /* This creates the 'blob' of names that appears at the end of the packet */
239 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
241 const char *target_name_dns = "";
242 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
243 target_name_dns = dnsdomname;
244 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
245 target_name_dns = dnsname;
248 msrpc_gen(out_mem_ctx,
249 &struct_blob, "aaaaa",
250 NTLMSSP_NAME_TYPE_DOMAIN, target_name,
251 NTLMSSP_NAME_TYPE_SERVER, gensec_ntlmssp_state->server_name,
252 NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
253 NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
256 struct_blob = data_blob(NULL, 0);
260 /* Marshel the packet in the right format, be it unicode or ASCII */
261 const char *gen_string;
262 if (gensec_ntlmssp_state->unicode) {
263 gen_string = "CdUdbddB";
265 gen_string = "CdAdbddB";
268 msrpc_gen(out_mem_ctx,
276 struct_blob.data, struct_blob.length);
279 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
281 return NT_STATUS_MORE_PROCESSING_REQUIRED;
285 * Next state function for the Authenticate packet
287 * @param gensec_ntlmssp_state NTLMSSP State
288 * @param request The request, as a DATA_BLOB
289 * @return Errors or NT_STATUS_OK.
292 static NTSTATUS ntlmssp_server_preauth(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
293 const DATA_BLOB request)
295 uint32_t ntlmssp_command, auth_flags;
298 uint8_t session_nonce_hash[16];
300 const char *parse_string;
303 char *workstation = NULL;
306 file_save("ntlmssp_auth.dat", request.data, request.length);
309 if (gensec_ntlmssp_state->unicode) {
310 parse_string = "CdBBUUUBd";
312 parse_string = "CdBBAAABd";
316 data_blob_free(&gensec_ntlmssp_state->lm_resp);
317 data_blob_free(&gensec_ntlmssp_state->nt_resp);
318 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
320 gensec_ntlmssp_state->user = NULL;
321 gensec_ntlmssp_state->domain = NULL;
322 gensec_ntlmssp_state->workstation = NULL;
324 /* now the NTLMSSP encoded auth hashes */
325 if (!msrpc_parse(gensec_ntlmssp_state,
326 &request, parse_string,
329 &gensec_ntlmssp_state->lm_resp,
330 &gensec_ntlmssp_state->nt_resp,
334 &gensec_ntlmssp_state->encrypted_session_key,
336 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
337 dump_data(10, request.data, request.length);
340 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
343 /* Try again with a shorter string (Win9X truncates this packet) */
344 if (gensec_ntlmssp_state->unicode) {
345 parse_string = "CdBBUUU";
347 parse_string = "CdBBAAA";
350 /* now the NTLMSSP encoded auth hashes */
351 if (!msrpc_parse(gensec_ntlmssp_state,
352 &request, parse_string,
355 &gensec_ntlmssp_state->lm_resp,
356 &gensec_ntlmssp_state->nt_resp,
360 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
361 dump_data(2, request.data, request.length);
363 return NT_STATUS_INVALID_PARAMETER;
368 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, auth_flags, gensec_ntlmssp_state->allow_lm_key);
370 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(gensec_ntlmssp_state, domain))) {
372 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
376 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(gensec_ntlmssp_state, user))) {
378 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
382 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state, workstation))) {
384 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
388 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
389 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));
392 file_save("nthash1.dat", &gensec_ntlmssp_state->nt_resp.data, &gensec_ntlmssp_state->nt_resp.length);
393 file_save("lmhash1.dat", &gensec_ntlmssp_state->lm_resp.data, &gensec_ntlmssp_state->lm_resp.length);
396 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
399 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
401 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
402 if (gensec_ntlmssp_state->nt_resp.length == 24 && gensec_ntlmssp_state->lm_resp.length == 24) {
403 struct MD5Context md5_session_nonce_ctx;
404 SMB_ASSERT(gensec_ntlmssp_state->internal_chal.data
405 && gensec_ntlmssp_state->internal_chal.length == 8);
407 gensec_ntlmssp_state->doing_ntlm2 = True;
409 memcpy(gensec_ntlmssp_state->crypt.ntlm2.session_nonce, gensec_ntlmssp_state->internal_chal.data, 8);
410 memcpy(&gensec_ntlmssp_state->crypt.ntlm2.session_nonce[8], gensec_ntlmssp_state->lm_resp.data, 8);
412 MD5Init(&md5_session_nonce_ctx);
413 MD5Update(&md5_session_nonce_ctx, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, 16);
414 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
416 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state,
417 session_nonce_hash, 8);
419 /* LM response is no longer useful, zero it out */
420 data_blob_free(&gensec_ntlmssp_state->lm_resp);
422 /* We changed the effective challenge - set it */
423 if (!NT_STATUS_IS_OK(nt_status =
424 gensec_ntlmssp_state->set_challenge(gensec_ntlmssp_state,
425 &gensec_ntlmssp_state->chal))) {
427 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
431 /* LM Key is incompatible... */
432 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
439 * Next state function for the Authenticate packet
440 * (after authentication - figures out the session keys etc)
442 * @param gensec_ntlmssp_state NTLMSSP State
443 * @return Errors or NT_STATUS_OK.
446 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
447 DATA_BLOB *user_session_key,
448 DATA_BLOB *lm_session_key)
450 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
452 DATA_BLOB session_key = data_blob(NULL, 0);
454 if (user_session_key)
455 dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
458 dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
460 /* Handle the different session key derivation for NTLM2 */
461 if (gensec_ntlmssp_state->doing_ntlm2) {
462 if (user_session_key && user_session_key->data && user_session_key->length == 16) {
463 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
464 hmac_md5(user_session_key->data, gensec_ntlmssp_state->crypt.ntlm2.session_nonce,
465 sizeof(gensec_ntlmssp_state->crypt.ntlm2.session_nonce), session_key.data);
466 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
467 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
470 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
471 session_key = data_blob(NULL, 0);
473 } else if ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
474 /* Ensure we can never get here on NTLMv2 */
475 && (gensec_ntlmssp_state->nt_resp.length == 0 || gensec_ntlmssp_state->nt_resp.length == 24)) {
477 if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
478 if (gensec_ntlmssp_state->lm_resp.data && gensec_ntlmssp_state->lm_resp.length == 24) {
479 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
480 SMBsesskeygen_lm_sess_key(lm_session_key->data, gensec_ntlmssp_state->lm_resp.data,
482 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
483 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
486 /* When there is no LM response, just use zeros */
487 static const uint8_t zeros[24];
488 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
489 SMBsesskeygen_lm_sess_key(zeros, zeros,
491 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
492 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
495 /* LM Key not selected */
496 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
498 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
499 session_key = data_blob(NULL, 0);
502 } else if (user_session_key && user_session_key->data) {
503 session_key = *user_session_key;
504 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
505 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
507 /* LM Key not selected */
508 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
510 } else if (lm_session_key && lm_session_key->data) {
511 /* Very weird to have LM key, but no user session key, but anyway.. */
512 session_key = *lm_session_key;
513 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
514 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
516 /* LM Key not selected */
517 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
520 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
521 session_key = data_blob(NULL, 0);
523 /* LM Key not selected */
524 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
527 /* With KEY_EXCH, the client supplies the proposed session key,
528 but encrypts it with the long-term key */
529 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
530 if (!gensec_ntlmssp_state->encrypted_session_key.data
531 || gensec_ntlmssp_state->encrypted_session_key.length != 16) {
532 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
533 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
534 (unsigned)gensec_ntlmssp_state->encrypted_session_key.length));
535 return NT_STATUS_INVALID_PARAMETER;
536 } else if (!session_key.data || session_key.length != 16) {
537 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
538 (unsigned)session_key.length));
539 gensec_ntlmssp_state->session_key = session_key;
541 dump_data_pw("KEY_EXCH session key (enc):\n",
542 gensec_ntlmssp_state->encrypted_session_key.data,
543 gensec_ntlmssp_state->encrypted_session_key.length);
544 arcfour_crypt(gensec_ntlmssp_state->encrypted_session_key.data,
546 gensec_ntlmssp_state->encrypted_session_key.length);
547 gensec_ntlmssp_state->session_key = data_blob_talloc(gensec_ntlmssp_state,
548 gensec_ntlmssp_state->encrypted_session_key.data,
549 gensec_ntlmssp_state->encrypted_session_key.length);
550 dump_data_pw("KEY_EXCH session key:\n", gensec_ntlmssp_state->encrypted_session_key.data,
551 gensec_ntlmssp_state->encrypted_session_key.length);
554 gensec_ntlmssp_state->session_key = session_key;
557 /* keep the session key around on the new context */
558 talloc_steal(gensec_ntlmssp_state, session_key.data);
560 if ((gensec_security->want_features & GENSEC_FEATURE_SIGN)
561 || (gensec_security->want_features & GENSEC_FEATURE_SEAL)) {
562 nt_status = ntlmssp_sign_init(gensec_ntlmssp_state);
564 nt_status = NT_STATUS_OK;
567 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
569 /* allow arbitarily many authentications, but watch that this will cause a
570 memory leak, until the gensec_ntlmssp_state is shutdown
573 if (gensec_ntlmssp_state->server_multiple_authentications) {
574 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
576 gensec_ntlmssp_state->expected_state = NTLMSSP_DONE;
584 * Next state function for the Authenticate packet
586 * @param gensec_security GENSEC state
587 * @param out_mem_ctx Memory context for *out
588 * @param in The request, as a DATA_BLOB. reply.data must be NULL
589 * @param out The reply, as an allocated DATA_BLOB, caller to free.
590 * @return Errors or NT_STATUS_OK if authentication sucessful
593 NTSTATUS ntlmssp_server_auth(struct gensec_security *gensec_security,
594 TALLOC_CTX *out_mem_ctx,
595 const DATA_BLOB in, DATA_BLOB *out)
597 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
598 DATA_BLOB user_session_key = data_blob(NULL, 0);
599 DATA_BLOB lm_session_key = data_blob(NULL, 0);
602 TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
604 return NT_STATUS_NO_MEMORY;
607 /* zero the outbound NTLMSSP packet */
608 *out = data_blob_talloc(out_mem_ctx, NULL, 0);
610 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(gensec_ntlmssp_state, in))) {
611 talloc_free(mem_ctx);
616 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
617 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
618 * smb.conf file) and no NTLMv2 response was sent then the password check
619 * will fail here. JRA.
622 /* Finally, actually ask if the password is OK */
624 if (!NT_STATUS_IS_OK(nt_status = gensec_ntlmssp_state->check_password(gensec_ntlmssp_state, mem_ctx,
625 &user_session_key, &lm_session_key))) {
626 talloc_free(mem_ctx);
630 if (gensec_security->want_features
631 & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL|GENSEC_FEATURE_SESSION_KEY)) {
632 nt_status = ntlmssp_server_postauth(gensec_security, &user_session_key, &lm_session_key);
633 talloc_free(mem_ctx);
636 gensec_ntlmssp_state->session_key = data_blob(NULL, 0);
637 talloc_free(mem_ctx);
643 * Return the challenge as determined by the authentication subsystem
644 * @return an 8 byte random challenge
647 static const uint8_t *auth_ntlmssp_get_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
652 status = auth_get_challenge(gensec_ntlmssp_state->auth_context, &chal);
653 if (!NT_STATUS_IS_OK(status)) {
661 * Some authentication methods 'fix' the challenge, so we may not be able to set it
663 * @return If the effective challenge used by the auth subsystem may be modified
665 static BOOL auth_ntlmssp_may_set_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
667 return auth_challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
671 * NTLM2 authentication modifies the effective challenge,
672 * @param challenge The new challenge value
674 static NTSTATUS auth_ntlmssp_set_challenge(struct gensec_ntlmssp_state *gensec_ntlmssp_state, DATA_BLOB *challenge)
677 struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
680 if (challenge->length != 8) {
681 return NT_STATUS_INVALID_PARAMETER;
684 chal = challenge->data;
686 nt_status = auth_context_set_challenge(auth_context, chal, "NTLMSSP callback (NTLM2)");
692 * Check the password on an NTLMSSP login.
694 * Return the session keys used on the connection.
697 static NTSTATUS auth_ntlmssp_check_password(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
699 DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
702 struct auth_usersupplied_info *user_info = talloc(mem_ctx, struct auth_usersupplied_info);
704 return NT_STATUS_NO_MEMORY;
707 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
708 user_info->flags = 0;
709 user_info->mapped_state = False;
710 user_info->client.account_name = gensec_ntlmssp_state->user;
711 user_info->client.domain_name = gensec_ntlmssp_state->domain;
712 user_info->workstation_name = gensec_ntlmssp_state->workstation;
713 user_info->remote_host = gensec_get_peer_addr(gensec_ntlmssp_state->gensec_security);
715 user_info->password_state = AUTH_PASSWORD_RESPONSE;
716 user_info->password.response.lanman = gensec_ntlmssp_state->lm_resp;
717 user_info->password.response.lanman.data = talloc_steal(user_info, gensec_ntlmssp_state->lm_resp.data);
718 user_info->password.response.nt = gensec_ntlmssp_state->nt_resp;
719 user_info->password.response.nt.data = talloc_steal(user_info, gensec_ntlmssp_state->nt_resp.data);
721 nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, mem_ctx,
722 user_info, &gensec_ntlmssp_state->server_info);
723 talloc_free(user_info);
724 NT_STATUS_NOT_OK_RETURN(nt_status);
726 talloc_steal(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info);
728 if (gensec_ntlmssp_state->server_info->user_session_key.length) {
729 DEBUG(10, ("Got NT session key of length %u\n",
730 (unsigned)gensec_ntlmssp_state->server_info->user_session_key.length));
731 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->user_session_key.data)) {
732 return NT_STATUS_NO_MEMORY;
735 *user_session_key = gensec_ntlmssp_state->server_info->user_session_key;
737 if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
738 DEBUG(10, ("Got LM session key of length %u\n",
739 (unsigned)gensec_ntlmssp_state->server_info->lm_session_key.length));
740 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->lm_session_key.data)) {
741 return NT_STATUS_NO_MEMORY;
744 *lm_session_key = gensec_ntlmssp_state->server_info->lm_session_key;
750 * Return the credentials of a logged on user, including session keys
753 * Only valid after a successful authentication
755 * May only be called once per authentication.
759 NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
760 struct auth_session_info **session_info)
763 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
765 nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info, session_info);
766 NT_STATUS_NOT_OK_RETURN(nt_status);
768 (*session_info)->session_key = data_blob_talloc(*session_info,
769 gensec_ntlmssp_state->session_key.data,
770 gensec_ntlmssp_state->session_key.length);
776 * Start NTLMSSP on the server side
779 NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
782 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
784 nt_status = gensec_ntlmssp_start(gensec_security);
785 NT_STATUS_NOT_OK_RETURN(nt_status);
787 gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
789 gensec_ntlmssp_state->role = NTLMSSP_SERVER;
791 gensec_ntlmssp_state->workstation = NULL;
792 gensec_ntlmssp_state->server_name = lp_netbios_name();
794 gensec_ntlmssp_state->get_domain = lp_workgroup;
796 gensec_ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
798 gensec_ntlmssp_state->allow_lm_key = (lp_lanman_auth()
799 && lp_parm_bool(-1, "ntlmssp_server", "allow_lm_key", False));
801 gensec_ntlmssp_state->server_multiple_authentications = False;
803 gensec_ntlmssp_state->neg_flags =
804 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_UNKNOWN_02000000;
806 gensec_ntlmssp_state->lm_resp = data_blob(NULL, 0);
807 gensec_ntlmssp_state->nt_resp = data_blob(NULL, 0);
808 gensec_ntlmssp_state->encrypted_session_key = data_blob(NULL, 0);
810 if (lp_parm_bool(-1, "ntlmssp_server", "128bit", True)) {
811 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
814 if (lp_parm_bool(-1, "ntlmssp_server", "56bit", True)) {
815 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
818 if (lp_parm_bool(-1, "ntlmssp_server", "keyexchange", True)) {
819 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
822 if (lp_parm_bool(-1, "ntlmssp_server", "alwayssign", True)) {
823 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
826 if (lp_parm_bool(-1, "ntlmssp_server", "ntlm2", True)) {
827 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
830 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
831 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
833 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
834 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
837 nt_status = auth_context_create(gensec_ntlmssp_state,
838 gensec_security->event_ctx,
839 gensec_security->msg_ctx,
840 &gensec_ntlmssp_state->auth_context);
841 NT_STATUS_NOT_OK_RETURN(nt_status);
843 gensec_ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
844 gensec_ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
845 gensec_ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
846 gensec_ntlmssp_state->check_password = auth_ntlmssp_check_password;
847 gensec_ntlmssp_state->server_role = lp_server_role();