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"
28 #include "system/filesys.h"
29 #include "libcli/auth/libcli_auth.h"
30 #include "auth/credentials/credentials.h"
31 #include "auth/gensec/gensec.h"
32 #include "auth/auth.h"
33 #include "param/param.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->domain;
111 * Next state function for the Negotiate packet
113 * @param gensec_security GENSEC state
114 * @param out_mem_ctx Memory context for *out
115 * @param in The request, as a DATA_BLOB. reply.data must be NULL
116 * @param out The reply, as an allocated DATA_BLOB, caller to free.
117 * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
120 NTSTATUS ntlmssp_server_negotiate(struct gensec_security *gensec_security,
121 TALLOC_CTX *out_mem_ctx,
122 const DATA_BLOB in, DATA_BLOB *out)
124 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
125 DATA_BLOB struct_blob;
126 char dnsname[MAXHOSTNAMELEN], dnsdomname[MAXHOSTNAMELEN];
128 uint32_t neg_flags = 0;
129 uint32_t ntlmssp_command, chal_flags;
130 const uint8_t *cryptkey;
131 const char *target_name;
133 /* parse the NTLMSSP packet */
135 file_save("ntlmssp_negotiate.dat", request.data, request.length);
139 if ((in.length < 16) || !msrpc_parse(out_mem_ctx, &in, "Cdd",
143 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse "
144 "NTLMSSP Negotiate of length %u:\n",
145 (unsigned int)in.length ));
146 dump_data(2, in.data, in.length);
147 return NT_STATUS_INVALID_PARAMETER;
149 debug_ntlmssp_flags(neg_flags);
152 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, neg_flags, gensec_ntlmssp_state->allow_lm_key);
154 /* Ask our caller what challenge they would like in the packet */
155 cryptkey = gensec_ntlmssp_state->get_challenge(gensec_ntlmssp_state);
157 /* Check if we may set the challenge */
158 if (!gensec_ntlmssp_state->may_set_challenge(gensec_ntlmssp_state)) {
159 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
162 /* The flags we send back are not just the negotiated flags,
163 * they are also 'what is in this packet'. Therfore, we
164 * operate on 'chal_flags' from here on
167 chal_flags = gensec_ntlmssp_state->neg_flags;
169 /* get the right name to fill in as 'target' */
170 target_name = ntlmssp_target_name(gensec_ntlmssp_state,
171 neg_flags, &chal_flags);
172 if (target_name == NULL)
173 return NT_STATUS_INVALID_PARAMETER;
175 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
176 gensec_ntlmssp_state->internal_chal = data_blob_talloc(gensec_ntlmssp_state, cryptkey, 8);
179 if (gethostname(dnsname, sizeof(dnsname)) == -1) {
180 DEBUG(0,("gethostname failed\n"));
181 return NT_STATUS_UNSUCCESSFUL;
184 /* This should be a 'netbios domain -> DNS domain' mapping */
185 p = strchr(dnsname, '.');
187 safe_strcpy(dnsdomname, p+1, sizeof(dnsdomname));
188 strlower_m(dnsdomname);
190 dnsdomname[0] = '\0';
193 /* This creates the 'blob' of names that appears at the end of the packet */
194 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
196 const char *target_name_dns = "";
197 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
198 target_name_dns = dnsdomname;
199 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
200 target_name_dns = dnsname;
203 msrpc_gen(out_mem_ctx,
204 &struct_blob, "aaaaa",
205 NTLMSSP_NAME_TYPE_DOMAIN, target_name,
206 NTLMSSP_NAME_TYPE_SERVER, gensec_ntlmssp_state->server_name,
207 NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
208 NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
211 struct_blob = data_blob(NULL, 0);
215 /* Marshel the packet in the right format, be it unicode or ASCII */
216 const char *gen_string;
217 if (gensec_ntlmssp_state->unicode) {
218 gen_string = "CdUdbddB";
220 gen_string = "CdAdbddB";
223 msrpc_gen(out_mem_ctx,
231 struct_blob.data, struct_blob.length);
234 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
236 return NT_STATUS_MORE_PROCESSING_REQUIRED;
240 * Next state function for the Authenticate packet
242 * @param gensec_ntlmssp_state NTLMSSP State
243 * @param request The request, as a DATA_BLOB
244 * @return Errors or NT_STATUS_OK.
247 static NTSTATUS ntlmssp_server_preauth(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
248 const DATA_BLOB request)
250 uint32_t ntlmssp_command, auth_flags;
253 uint8_t session_nonce_hash[16];
255 const char *parse_string;
258 char *workstation = NULL;
261 file_save("ntlmssp_auth.dat", request.data, request.length);
264 if (gensec_ntlmssp_state->unicode) {
265 parse_string = "CdBBUUUBd";
267 parse_string = "CdBBAAABd";
271 data_blob_free(&gensec_ntlmssp_state->lm_resp);
272 data_blob_free(&gensec_ntlmssp_state->nt_resp);
273 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
275 gensec_ntlmssp_state->user = NULL;
276 gensec_ntlmssp_state->domain = NULL;
277 gensec_ntlmssp_state->workstation = NULL;
279 /* now the NTLMSSP encoded auth hashes */
280 if (!msrpc_parse(gensec_ntlmssp_state,
281 &request, parse_string,
284 &gensec_ntlmssp_state->lm_resp,
285 &gensec_ntlmssp_state->nt_resp,
289 &gensec_ntlmssp_state->encrypted_session_key,
291 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
292 dump_data(10, request.data, request.length);
295 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
298 /* Try again with a shorter string (Win9X truncates this packet) */
299 if (gensec_ntlmssp_state->unicode) {
300 parse_string = "CdBBUUU";
302 parse_string = "CdBBAAA";
305 /* now the NTLMSSP encoded auth hashes */
306 if (!msrpc_parse(gensec_ntlmssp_state,
307 &request, parse_string,
310 &gensec_ntlmssp_state->lm_resp,
311 &gensec_ntlmssp_state->nt_resp,
315 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
316 dump_data(2, request.data, request.length);
318 return NT_STATUS_INVALID_PARAMETER;
323 ntlmssp_handle_neg_flags(gensec_ntlmssp_state, auth_flags, gensec_ntlmssp_state->allow_lm_key);
325 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(gensec_ntlmssp_state, domain))) {
327 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
331 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(gensec_ntlmssp_state, user))) {
333 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
337 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(gensec_ntlmssp_state, workstation))) {
339 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
343 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
344 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));
347 file_save("nthash1.dat", &gensec_ntlmssp_state->nt_resp.data, &gensec_ntlmssp_state->nt_resp.length);
348 file_save("lmhash1.dat", &gensec_ntlmssp_state->lm_resp.data, &gensec_ntlmssp_state->lm_resp.length);
351 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
354 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
356 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
357 if (gensec_ntlmssp_state->nt_resp.length == 24 && gensec_ntlmssp_state->lm_resp.length == 24) {
358 struct MD5Context md5_session_nonce_ctx;
359 SMB_ASSERT(gensec_ntlmssp_state->internal_chal.data
360 && gensec_ntlmssp_state->internal_chal.length == 8);
362 gensec_ntlmssp_state->doing_ntlm2 = true;
364 memcpy(gensec_ntlmssp_state->crypt.ntlm2.session_nonce, gensec_ntlmssp_state->internal_chal.data, 8);
365 memcpy(&gensec_ntlmssp_state->crypt.ntlm2.session_nonce[8], gensec_ntlmssp_state->lm_resp.data, 8);
367 MD5Init(&md5_session_nonce_ctx);
368 MD5Update(&md5_session_nonce_ctx, gensec_ntlmssp_state->crypt.ntlm2.session_nonce, 16);
369 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
371 gensec_ntlmssp_state->chal = data_blob_talloc(gensec_ntlmssp_state,
372 session_nonce_hash, 8);
374 /* LM response is no longer useful, zero it out */
375 data_blob_free(&gensec_ntlmssp_state->lm_resp);
377 /* We changed the effective challenge - set it */
378 if (!NT_STATUS_IS_OK(nt_status =
379 gensec_ntlmssp_state->set_challenge(gensec_ntlmssp_state,
380 &gensec_ntlmssp_state->chal))) {
382 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
386 /* LM Key is incompatible... */
387 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
394 * Next state function for the Authenticate packet
395 * (after authentication - figures out the session keys etc)
397 * @param gensec_ntlmssp_state NTLMSSP State
398 * @return Errors or NT_STATUS_OK.
401 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
402 DATA_BLOB *user_session_key,
403 DATA_BLOB *lm_session_key)
405 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
407 DATA_BLOB session_key = data_blob(NULL, 0);
409 if (user_session_key)
410 dump_data_pw("USER session key:\n", user_session_key->data, user_session_key->length);
413 dump_data_pw("LM first-8:\n", lm_session_key->data, lm_session_key->length);
415 /* Handle the different session key derivation for NTLM2 */
416 if (gensec_ntlmssp_state->doing_ntlm2) {
417 if (user_session_key && user_session_key->data && user_session_key->length == 16) {
418 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
419 hmac_md5(user_session_key->data, gensec_ntlmssp_state->crypt.ntlm2.session_nonce,
420 sizeof(gensec_ntlmssp_state->crypt.ntlm2.session_nonce), session_key.data);
421 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
422 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
425 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
426 session_key = data_blob(NULL, 0);
428 } else if ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
429 /* Ensure we can never get here on NTLMv2 */
430 && (gensec_ntlmssp_state->nt_resp.length == 0 || gensec_ntlmssp_state->nt_resp.length == 24)) {
432 if (lm_session_key && lm_session_key->data && lm_session_key->length >= 8) {
433 if (gensec_ntlmssp_state->lm_resp.data && gensec_ntlmssp_state->lm_resp.length == 24) {
434 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
435 SMBsesskeygen_lm_sess_key(lm_session_key->data, gensec_ntlmssp_state->lm_resp.data,
437 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
438 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
441 /* When there is no LM response, just use zeros */
442 static const uint8_t zeros[24];
443 session_key = data_blob_talloc(gensec_ntlmssp_state, NULL, 16);
444 SMBsesskeygen_lm_sess_key(zeros, zeros,
446 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
447 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
450 /* LM Key not selected */
451 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
453 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
454 session_key = data_blob(NULL, 0);
457 } else if (user_session_key && user_session_key->data) {
458 session_key = *user_session_key;
459 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
460 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
462 /* LM Key not selected */
463 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
465 } else if (lm_session_key && lm_session_key->data) {
466 /* Very weird to have LM key, but no user session key, but anyway.. */
467 session_key = *lm_session_key;
468 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
469 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
471 /* LM Key not selected */
472 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
475 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
476 session_key = data_blob(NULL, 0);
478 /* LM Key not selected */
479 gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
482 /* With KEY_EXCH, the client supplies the proposed session key,
483 but encrypts it with the long-term key */
484 if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
485 if (!gensec_ntlmssp_state->encrypted_session_key.data
486 || gensec_ntlmssp_state->encrypted_session_key.length != 16) {
487 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
488 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
489 (unsigned)gensec_ntlmssp_state->encrypted_session_key.length));
490 return NT_STATUS_INVALID_PARAMETER;
491 } else if (!session_key.data || session_key.length != 16) {
492 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
493 (unsigned)session_key.length));
494 gensec_ntlmssp_state->session_key = session_key;
496 dump_data_pw("KEY_EXCH session key (enc):\n",
497 gensec_ntlmssp_state->encrypted_session_key.data,
498 gensec_ntlmssp_state->encrypted_session_key.length);
499 arcfour_crypt(gensec_ntlmssp_state->encrypted_session_key.data,
501 gensec_ntlmssp_state->encrypted_session_key.length);
502 gensec_ntlmssp_state->session_key = data_blob_talloc(gensec_ntlmssp_state,
503 gensec_ntlmssp_state->encrypted_session_key.data,
504 gensec_ntlmssp_state->encrypted_session_key.length);
505 dump_data_pw("KEY_EXCH session key:\n", gensec_ntlmssp_state->encrypted_session_key.data,
506 gensec_ntlmssp_state->encrypted_session_key.length);
509 gensec_ntlmssp_state->session_key = session_key;
512 /* keep the session key around on the new context */
513 talloc_steal(gensec_ntlmssp_state, session_key.data);
515 if ((gensec_security->want_features & GENSEC_FEATURE_SIGN)
516 || (gensec_security->want_features & GENSEC_FEATURE_SEAL)) {
517 nt_status = ntlmssp_sign_init(gensec_ntlmssp_state);
519 nt_status = NT_STATUS_OK;
522 data_blob_free(&gensec_ntlmssp_state->encrypted_session_key);
524 /* allow arbitarily many authentications, but watch that this will cause a
525 memory leak, until the gensec_ntlmssp_state is shutdown
528 if (gensec_ntlmssp_state->server_multiple_authentications) {
529 gensec_ntlmssp_state->expected_state = NTLMSSP_AUTH;
531 gensec_ntlmssp_state->expected_state = NTLMSSP_DONE;
539 * Next state function for the Authenticate packet
541 * @param gensec_security GENSEC state
542 * @param out_mem_ctx Memory context for *out
543 * @param in The request, as a DATA_BLOB. reply.data must be NULL
544 * @param out The reply, as an allocated DATA_BLOB, caller to free.
545 * @return Errors or NT_STATUS_OK if authentication sucessful
548 NTSTATUS ntlmssp_server_auth(struct gensec_security *gensec_security,
549 TALLOC_CTX *out_mem_ctx,
550 const DATA_BLOB in, DATA_BLOB *out)
552 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
553 DATA_BLOB user_session_key = data_blob(NULL, 0);
554 DATA_BLOB lm_session_key = data_blob(NULL, 0);
557 TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
559 return NT_STATUS_NO_MEMORY;
562 /* zero the outbound NTLMSSP packet */
563 *out = data_blob_talloc(out_mem_ctx, NULL, 0);
565 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_preauth(gensec_ntlmssp_state, in))) {
566 talloc_free(mem_ctx);
571 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
572 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
573 * smb.conf file) and no NTLMv2 response was sent then the password check
574 * will fail here. JRA.
577 /* Finally, actually ask if the password is OK */
579 if (!NT_STATUS_IS_OK(nt_status = gensec_ntlmssp_state->check_password(gensec_ntlmssp_state, mem_ctx,
580 &user_session_key, &lm_session_key))) {
581 talloc_free(mem_ctx);
585 if (gensec_security->want_features
586 & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL|GENSEC_FEATURE_SESSION_KEY)) {
587 nt_status = ntlmssp_server_postauth(gensec_security, &user_session_key, &lm_session_key);
588 talloc_free(mem_ctx);
591 gensec_ntlmssp_state->session_key = data_blob(NULL, 0);
592 talloc_free(mem_ctx);
598 * Return the challenge as determined by the authentication subsystem
599 * @return an 8 byte random challenge
602 static const uint8_t *auth_ntlmssp_get_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
607 status = auth_get_challenge(gensec_ntlmssp_state->auth_context, &chal);
608 if (!NT_STATUS_IS_OK(status)) {
616 * Some authentication methods 'fix' the challenge, so we may not be able to set it
618 * @return If the effective challenge used by the auth subsystem may be modified
620 static bool auth_ntlmssp_may_set_challenge(const struct gensec_ntlmssp_state *gensec_ntlmssp_state)
622 return auth_challenge_may_be_modified(gensec_ntlmssp_state->auth_context);
626 * NTLM2 authentication modifies the effective challenge,
627 * @param challenge The new challenge value
629 static NTSTATUS auth_ntlmssp_set_challenge(struct gensec_ntlmssp_state *gensec_ntlmssp_state, DATA_BLOB *challenge)
632 struct auth_context *auth_context = gensec_ntlmssp_state->auth_context;
635 if (challenge->length != 8) {
636 return NT_STATUS_INVALID_PARAMETER;
639 chal = challenge->data;
641 nt_status = auth_context_set_challenge(auth_context, chal, "NTLMSSP callback (NTLM2)");
647 * Check the password on an NTLMSSP login.
649 * Return the session keys used on the connection.
652 static NTSTATUS auth_ntlmssp_check_password(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
654 DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
657 struct auth_usersupplied_info *user_info = talloc(mem_ctx, struct auth_usersupplied_info);
659 return NT_STATUS_NO_MEMORY;
662 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
663 user_info->flags = 0;
664 user_info->mapped_state = false;
665 user_info->client.account_name = gensec_ntlmssp_state->user;
666 user_info->client.domain_name = gensec_ntlmssp_state->domain;
667 user_info->workstation_name = gensec_ntlmssp_state->workstation;
668 user_info->remote_host = gensec_get_peer_addr(gensec_ntlmssp_state->gensec_security);
670 user_info->password_state = AUTH_PASSWORD_RESPONSE;
671 user_info->password.response.lanman = gensec_ntlmssp_state->lm_resp;
672 user_info->password.response.lanman.data = talloc_steal(user_info, gensec_ntlmssp_state->lm_resp.data);
673 user_info->password.response.nt = gensec_ntlmssp_state->nt_resp;
674 user_info->password.response.nt.data = talloc_steal(user_info, gensec_ntlmssp_state->nt_resp.data);
676 nt_status = auth_check_password(gensec_ntlmssp_state->auth_context, mem_ctx,
677 user_info, &gensec_ntlmssp_state->server_info);
678 talloc_free(user_info);
679 NT_STATUS_NOT_OK_RETURN(nt_status);
681 talloc_steal(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info);
683 if (gensec_ntlmssp_state->server_info->user_session_key.length) {
684 DEBUG(10, ("Got NT session key of length %u\n",
685 (unsigned)gensec_ntlmssp_state->server_info->user_session_key.length));
686 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->user_session_key.data)) {
687 return NT_STATUS_NO_MEMORY;
690 *user_session_key = gensec_ntlmssp_state->server_info->user_session_key;
692 if (gensec_ntlmssp_state->server_info->lm_session_key.length) {
693 DEBUG(10, ("Got LM session key of length %u\n",
694 (unsigned)gensec_ntlmssp_state->server_info->lm_session_key.length));
695 if (!talloc_reference(mem_ctx, gensec_ntlmssp_state->server_info->lm_session_key.data)) {
696 return NT_STATUS_NO_MEMORY;
699 *lm_session_key = gensec_ntlmssp_state->server_info->lm_session_key;
705 * Return the credentials of a logged on user, including session keys
708 * Only valid after a successful authentication
710 * May only be called once per authentication.
714 NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
715 struct auth_session_info **session_info)
718 struct gensec_ntlmssp_state *gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
720 nt_status = auth_generate_session_info(gensec_ntlmssp_state, gensec_ntlmssp_state->server_info, session_info);
721 NT_STATUS_NOT_OK_RETURN(nt_status);
723 (*session_info)->session_key = data_blob_talloc(*session_info,
724 gensec_ntlmssp_state->session_key.data,
725 gensec_ntlmssp_state->session_key.length);
731 * Start NTLMSSP on the server side
734 NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
737 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
739 nt_status = gensec_ntlmssp_start(gensec_security);
740 NT_STATUS_NOT_OK_RETURN(nt_status);
742 gensec_ntlmssp_state = (struct gensec_ntlmssp_state *)gensec_security->private_data;
744 gensec_ntlmssp_state->role = NTLMSSP_SERVER;
746 gensec_ntlmssp_state->workstation = NULL;
747 gensec_ntlmssp_state->server_name = lp_netbios_name(gensec_security->lp_ctx);
749 gensec_ntlmssp_state->domain = lp_workgroup(gensec_security->lp_ctx);
751 gensec_ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
753 gensec_ntlmssp_state->allow_lm_key = (lp_lanman_auth(gensec_security->lp_ctx)
754 && lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "allow_lm_key", false));
756 gensec_ntlmssp_state->server_multiple_authentications = false;
758 gensec_ntlmssp_state->neg_flags =
759 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_UNKNOWN_02000000;
761 gensec_ntlmssp_state->lm_resp = data_blob(NULL, 0);
762 gensec_ntlmssp_state->nt_resp = data_blob(NULL, 0);
763 gensec_ntlmssp_state->encrypted_session_key = data_blob(NULL, 0);
765 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "128bit", true)) {
766 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
769 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "56bit", true)) {
770 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
773 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "keyexchange", true)) {
774 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
777 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "alwayssign", true)) {
778 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
781 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "ntlmssp_server", "ntlm2", true)) {
782 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
785 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
786 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
788 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
789 gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
792 nt_status = auth_context_create(gensec_ntlmssp_state,
793 gensec_security->event_ctx,
794 gensec_security->msg_ctx,
795 gensec_security->lp_ctx,
796 &gensec_ntlmssp_state->auth_context);
797 NT_STATUS_NOT_OK_RETURN(nt_status);
799 gensec_ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
800 gensec_ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
801 gensec_ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
802 gensec_ntlmssp_state->check_password = auth_ntlmssp_check_password;
803 gensec_ntlmssp_state->server_role = lp_server_role(gensec_security->lp_ctx);