2 Unix SMB/Netbios implementation.
4 handle NLTMSSP, server side
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett 2001-2003
8 Copyright (C) Andrew Bartlett 2005 (Updated from gensec).
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/>.
26 #include "../libcli/auth/libcli_auth.h"
27 #include "../librpc/gen_ndr/ndr_ntlmssp.h"
28 #include "../libcli/auth/ntlmssp_ndr.h"
30 static NTSTATUS
ntlmssp_client_initial(struct ntlmssp_state
*ntlmssp_state
,
31 DATA_BLOB reply
, DATA_BLOB
*next_request
);
32 static NTSTATUS
ntlmssp_server_negotiate(struct ntlmssp_state
*ntlmssp_state
,
33 const DATA_BLOB in
, DATA_BLOB
*out
);
34 static NTSTATUS
ntlmssp_client_challenge(struct ntlmssp_state
*ntlmssp_state
,
35 const DATA_BLOB reply
, DATA_BLOB
*next_request
);
36 static NTSTATUS
ntlmssp_server_auth(struct ntlmssp_state
*ntlmssp_state
,
37 const DATA_BLOB request
, DATA_BLOB
*reply
);
40 * Callbacks for NTLMSSP - for both client and server operating modes
44 static const struct ntlmssp_callbacks
{
45 enum ntlmssp_role role
;
46 enum ntlmssp_message_type ntlmssp_command
;
47 NTSTATUS (*fn
)(struct ntlmssp_state
*ntlmssp_state
,
48 DATA_BLOB in
, DATA_BLOB
*out
);
49 } ntlmssp_callbacks
[] = {
50 {NTLMSSP_CLIENT
, NTLMSSP_INITIAL
, ntlmssp_client_initial
},
51 {NTLMSSP_SERVER
, NTLMSSP_NEGOTIATE
, ntlmssp_server_negotiate
},
52 {NTLMSSP_CLIENT
, NTLMSSP_CHALLENGE
, ntlmssp_client_challenge
},
53 {NTLMSSP_SERVER
, NTLMSSP_AUTH
, ntlmssp_server_auth
},
54 {NTLMSSP_CLIENT
, NTLMSSP_UNKNOWN
, NULL
},
55 {NTLMSSP_SERVER
, NTLMSSP_UNKNOWN
, NULL
}
60 * Print out the NTLMSSP flags for debugging
61 * @param neg_flags The flags from the packet
64 void debug_ntlmssp_flags(uint32 neg_flags
)
66 DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags
));
68 if (neg_flags
& NTLMSSP_NEGOTIATE_UNICODE
)
69 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_UNICODE\n"));
70 if (neg_flags
& NTLMSSP_NEGOTIATE_OEM
)
71 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM\n"));
72 if (neg_flags
& NTLMSSP_REQUEST_TARGET
)
73 DEBUGADD(4, (" NTLMSSP_REQUEST_TARGET\n"));
74 if (neg_flags
& NTLMSSP_NEGOTIATE_SIGN
)
75 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SIGN\n"));
76 if (neg_flags
& NTLMSSP_NEGOTIATE_SEAL
)
77 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SEAL\n"));
78 if (neg_flags
& NTLMSSP_NEGOTIATE_DATAGRAM
)
79 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_DATAGRAM\n"));
80 if (neg_flags
& NTLMSSP_NEGOTIATE_LM_KEY
)
81 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_LM_KEY\n"));
82 if (neg_flags
& NTLMSSP_NEGOTIATE_NETWARE
)
83 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NETWARE\n"));
84 if (neg_flags
& NTLMSSP_NEGOTIATE_NTLM
)
85 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM\n"));
86 if (neg_flags
& NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED
)
87 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED\n"));
88 if (neg_flags
& NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED
)
89 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED\n"));
90 if (neg_flags
& NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL
)
91 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
92 if (neg_flags
& NTLMSSP_NEGOTIATE_ALWAYS_SIGN
)
93 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
94 if (neg_flags
& NTLMSSP_REQUEST_NON_NT_SESSION_KEY
)
95 DEBUGADD(4, (" NTLMSSP_REQUEST_NON_NT_SESSION_KEY\n"));
96 if (neg_flags
& NTLMSSP_NEGOTIATE_NTLM2
)
97 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM2\n"));
98 if (neg_flags
& NTLMSSP_NEGOTIATE_TARGET_INFO
)
99 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_TARGET_INFO\n"));
100 if (neg_flags
& NTLMSSP_NEGOTIATE_VERSION
)
101 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_VERSION\n"));
102 if (neg_flags
& NTLMSSP_NEGOTIATE_128
)
103 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_128\n"));
104 if (neg_flags
& NTLMSSP_NEGOTIATE_KEY_EXCH
)
105 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
106 if (neg_flags
& NTLMSSP_NEGOTIATE_56
)
107 DEBUGADD(4, (" NTLMSSP_NEGOTIATE_56\n"));
111 * Default challenge generation code.
115 static NTSTATUS
get_challenge(const struct ntlmssp_state
*ntlmssp_state
,
118 generate_random_buffer(chal
, 8);
123 * Default 'we can set the challenge to anything we like' implementation
127 static bool may_set_challenge(const struct ntlmssp_state
*ntlmssp_state
)
133 * Default 'we can set the challenge to anything we like' implementation
135 * Does not actually do anything, as the value is always in the structure anyway.
139 static NTSTATUS
set_challenge(struct ntlmssp_state
*ntlmssp_state
, DATA_BLOB
*challenge
)
141 SMB_ASSERT(challenge
->length
== 8);
146 * Set a username on an NTLMSSP context - ensures it is talloc()ed
150 NTSTATUS
ntlmssp_set_username(struct ntlmssp_state
*ntlmssp_state
, const char *user
)
152 ntlmssp_state
->user
= talloc_strdup(ntlmssp_state
, user
? user
: "" );
153 if (!ntlmssp_state
->user
) {
154 return NT_STATUS_NO_MEMORY
;
160 * Store NT and LM hashes on an NTLMSSP context - ensures they are talloc()ed
163 NTSTATUS
ntlmssp_set_hashes(struct ntlmssp_state
*ntlmssp_state
,
164 const unsigned char lm_hash
[16],
165 const unsigned char nt_hash
[16])
167 ntlmssp_state
->lm_hash
= (unsigned char *)
168 TALLOC_MEMDUP(ntlmssp_state
, lm_hash
, 16);
169 ntlmssp_state
->nt_hash
= (unsigned char *)
170 TALLOC_MEMDUP(ntlmssp_state
, nt_hash
, 16);
171 if (!ntlmssp_state
->lm_hash
|| !ntlmssp_state
->nt_hash
) {
172 TALLOC_FREE(ntlmssp_state
->lm_hash
);
173 TALLOC_FREE(ntlmssp_state
->nt_hash
);
174 return NT_STATUS_NO_MEMORY
;
180 * Converts a password to the hashes on an NTLMSSP context.
183 NTSTATUS
ntlmssp_set_password(struct ntlmssp_state
*ntlmssp_state
, const char *password
)
186 ntlmssp_state
->lm_hash
= NULL
;
187 ntlmssp_state
->nt_hash
= NULL
;
189 unsigned char lm_hash
[16];
190 unsigned char nt_hash
[16];
192 E_deshash(password
, lm_hash
);
193 E_md4hash(password
, nt_hash
);
194 return ntlmssp_set_hashes(ntlmssp_state
, lm_hash
, nt_hash
);
200 * Set a domain on an NTLMSSP context - ensures it is talloc()ed
203 NTSTATUS
ntlmssp_set_domain(struct ntlmssp_state
*ntlmssp_state
, const char *domain
)
205 ntlmssp_state
->domain
= talloc_strdup(ntlmssp_state
,
206 domain
? domain
: "" );
207 if (!ntlmssp_state
->domain
) {
208 return NT_STATUS_NO_MEMORY
;
214 * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
217 NTSTATUS
ntlmssp_set_workstation(struct ntlmssp_state
*ntlmssp_state
, const char *workstation
)
219 ntlmssp_state
->workstation
= talloc_strdup(ntlmssp_state
, workstation
);
220 if (!ntlmssp_state
->workstation
) {
221 return NT_STATUS_NO_MEMORY
;
227 * Request features for the NTLMSSP negotiation
229 * @param ntlmssp_state NTLMSSP state
230 * @param feature_list List of space seperated features requested from NTLMSSP.
232 void ntlmssp_want_feature_list(struct ntlmssp_state
*ntlmssp_state
, char *feature_list
)
235 * We need to set this to allow a later SetPassword
236 * via the SAMR pipe to succeed. Strange.... We could
237 * also add NTLMSSP_NEGOTIATE_SEAL here. JRA.
239 if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list
, True
)) {
240 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_SIGN
;
242 if (in_list("NTLMSSP_FEATURE_SIGN", feature_list
, True
)) {
243 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_SIGN
;
245 if(in_list("NTLMSSP_FEATURE_SEAL", feature_list
, True
)) {
246 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_SEAL
;
248 if (in_list("NTLMSSP_FEATURE_CCACHE", feature_list
, true)) {
249 ntlmssp_state
->use_ccache
= true;
254 * Request a feature for the NTLMSSP negotiation
256 * @param ntlmssp_state NTLMSSP state
257 * @param feature Bit flag specifying the requested feature
259 void ntlmssp_want_feature(struct ntlmssp_state
*ntlmssp_state
, uint32 feature
)
261 /* As per JRA's comment above */
262 if (feature
& NTLMSSP_FEATURE_SESSION_KEY
) {
263 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_SIGN
;
265 if (feature
& NTLMSSP_FEATURE_SIGN
) {
266 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_SIGN
;
268 if (feature
& NTLMSSP_FEATURE_SEAL
) {
269 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_SEAL
;
271 if (feature
& NTLMSSP_FEATURE_CCACHE
) {
272 ntlmssp_state
->use_ccache
= true;
277 * Next state function for the NTLMSSP state machine
279 * @param ntlmssp_state NTLMSSP State
280 * @param in The packet in from the NTLMSSP partner, as a DATA_BLOB
281 * @param out The reply, as an allocated DATA_BLOB, caller to free.
282 * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
285 NTSTATUS
ntlmssp_update(struct ntlmssp_state
*ntlmssp_state
,
286 const DATA_BLOB input
, DATA_BLOB
*out
)
288 uint32 ntlmssp_command
;
291 if (ntlmssp_state
->expected_state
== NTLMSSP_DONE
) {
292 /* Called update after negotiations finished. */
293 DEBUG(1, ("Called NTLMSSP after state machine was 'done'\n"));
294 return NT_STATUS_INVALID_PARAMETER
;
297 *out
= data_blob_null
;
300 switch (ntlmssp_state
->role
) {
302 ntlmssp_command
= NTLMSSP_INITIAL
;
305 /* 'datagram' mode - no neg packet */
306 ntlmssp_command
= NTLMSSP_NEGOTIATE
;
310 if (!msrpc_parse(ntlmssp_state
, &input
, "Cd",
313 DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
314 dump_data(2, input
.data
, input
.length
);
315 return NT_STATUS_INVALID_PARAMETER
;
319 if (ntlmssp_command
!= ntlmssp_state
->expected_state
) {
320 DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command
, ntlmssp_state
->expected_state
));
321 return NT_STATUS_INVALID_PARAMETER
;
324 for (i
=0; ntlmssp_callbacks
[i
].fn
; i
++) {
325 if (ntlmssp_callbacks
[i
].role
== ntlmssp_state
->role
326 && ntlmssp_callbacks
[i
].ntlmssp_command
== ntlmssp_command
) {
327 return ntlmssp_callbacks
[i
].fn(ntlmssp_state
, input
, out
);
331 DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
332 ntlmssp_state
->role
, ntlmssp_command
));
334 return NT_STATUS_INVALID_PARAMETER
;
338 * End an NTLMSSP state machine
340 * @param ntlmssp_state NTLMSSP State, free()ed by this function
343 void ntlmssp_end(struct ntlmssp_state
**ntlmssp_state
)
345 data_blob_free(&(*ntlmssp_state
)->chal
);
346 data_blob_free(&(*ntlmssp_state
)->lm_resp
);
347 data_blob_free(&(*ntlmssp_state
)->nt_resp
);
348 TALLOC_FREE(*ntlmssp_state
);
350 *ntlmssp_state
= NULL
;
355 * Determine correct target name flags for reply, given server role
356 * and negotiated flags
358 * @param ntlmssp_state NTLMSSP State
359 * @param neg_flags The flags from the packet
360 * @param chal_flags The flags to be set in the reply packet
361 * @return The 'target name' string.
364 static const char *ntlmssp_target_name(struct ntlmssp_state
*ntlmssp_state
,
365 uint32 neg_flags
, uint32
*chal_flags
)
367 if (neg_flags
& NTLMSSP_REQUEST_TARGET
) {
368 *chal_flags
|= NTLMSSP_NEGOTIATE_TARGET_INFO
;
369 *chal_flags
|= NTLMSSP_REQUEST_TARGET
;
370 if (ntlmssp_state
->server_role
== ROLE_STANDALONE
) {
371 *chal_flags
|= NTLMSSP_TARGET_TYPE_SERVER
;
372 return ntlmssp_state
->get_global_myname();
374 *chal_flags
|= NTLMSSP_TARGET_TYPE_DOMAIN
;
375 return ntlmssp_state
->get_domain();
382 static void ntlmssp_handle_neg_flags(struct ntlmssp_state
*ntlmssp_state
,
383 uint32 neg_flags
, bool allow_lm
) {
384 if (neg_flags
& NTLMSSP_NEGOTIATE_UNICODE
) {
385 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_UNICODE
;
386 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_OEM
;
387 ntlmssp_state
->unicode
= True
;
389 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_UNICODE
;
390 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_OEM
;
391 ntlmssp_state
->unicode
= False
;
394 if ((neg_flags
& NTLMSSP_NEGOTIATE_LM_KEY
) && allow_lm
) {
395 /* other end forcing us to use LM */
396 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_LM_KEY
;
397 ntlmssp_state
->use_ntlmv2
= False
;
399 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_LM_KEY
;
402 if (!(neg_flags
& NTLMSSP_NEGOTIATE_ALWAYS_SIGN
)) {
403 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_ALWAYS_SIGN
;
406 if (!(neg_flags
& NTLMSSP_NEGOTIATE_NTLM2
)) {
407 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_NTLM2
;
410 if (!(neg_flags
& NTLMSSP_NEGOTIATE_128
)) {
411 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_128
;
414 if (!(neg_flags
& NTLMSSP_NEGOTIATE_56
)) {
415 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_56
;
418 if (!(neg_flags
& NTLMSSP_NEGOTIATE_KEY_EXCH
)) {
419 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_KEY_EXCH
;
422 if (!(neg_flags
& NTLMSSP_NEGOTIATE_SIGN
)) {
423 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_SIGN
;
426 if (!(neg_flags
& NTLMSSP_NEGOTIATE_SEAL
)) {
427 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_SEAL
;
430 /* Woop Woop - unknown flag for Windows compatibility...
431 What does this really do ? JRA. */
432 if (!(neg_flags
& NTLMSSP_NEGOTIATE_VERSION
)) {
433 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_VERSION
;
436 if ((neg_flags
& NTLMSSP_REQUEST_TARGET
)) {
437 ntlmssp_state
->neg_flags
|= NTLMSSP_REQUEST_TARGET
;
442 Weaken NTLMSSP keys to cope with down-level clients and servers.
444 We probably should have some parameters to control this, but as
445 it only occours for LM_KEY connections, and this is controlled
446 by the client lanman auth/lanman auth parameters, it isn't too bad.
449 DATA_BLOB
ntlmssp_weaken_keys(struct ntlmssp_state
*ntlmssp_state
, TALLOC_CTX
*mem_ctx
)
451 DATA_BLOB weakened_key
= data_blob_talloc(mem_ctx
,
452 ntlmssp_state
->session_key
.data
,
453 ntlmssp_state
->session_key
.length
);
455 /* Nothing to weaken. We certainly don't want to 'extend' the length... */
456 if (weakened_key
.length
< 16) {
457 /* perhaps there was no key? */
461 /* Key weakening not performed on the master key for NTLM2
462 and does not occour for NTLM1. Therefore we only need
463 to do this for the LM_KEY.
466 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_LM_KEY
) {
467 /* LM key doesn't support 128 bit crypto, so this is
468 * the best we can do. If you negotiate 128 bit, but
469 * not 56, you end up with 40 bit... */
470 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_56
) {
471 weakened_key
.data
[7] = 0xa0;
472 } else { /* forty bits */
473 weakened_key
.data
[5] = 0xe5;
474 weakened_key
.data
[6] = 0x38;
475 weakened_key
.data
[7] = 0xb0;
477 weakened_key
.length
= 8;
483 * Next state function for the Negotiate packet
485 * @param ntlmssp_state NTLMSSP State
486 * @param request The request, as a DATA_BLOB
487 * @param request The reply, as an allocated DATA_BLOB, caller to free.
488 * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
491 static NTSTATUS
ntlmssp_server_negotiate(struct ntlmssp_state
*ntlmssp_state
,
492 const DATA_BLOB request
, DATA_BLOB
*reply
)
494 DATA_BLOB struct_blob
;
496 char *dnsdomname
= NULL
;
497 uint32 neg_flags
= 0;
498 uint32 ntlmssp_command
, chal_flags
;
500 const char *target_name
;
501 struct NEGOTIATE_MESSAGE negotiate
;
502 struct CHALLENGE_MESSAGE challenge
;
505 /* parse the NTLMSSP packet */
507 file_save("ntlmssp_negotiate.dat", request
.data
, request
.length
);
510 if (request
.length
) {
511 if ((request
.length
< 16) || !msrpc_parse(ntlmssp_state
, &request
, "Cdd",
515 DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP Negotiate of length %u\n",
516 (unsigned int)request
.length
));
517 dump_data(2, request
.data
, request
.length
);
518 return NT_STATUS_INVALID_PARAMETER
;
520 debug_ntlmssp_flags(neg_flags
);
522 if (DEBUGLEVEL
>= 10) {
523 if (NT_STATUS_IS_OK(ntlmssp_pull_NEGOTIATE_MESSAGE(&request
,
528 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE
, &negotiate
);
533 ntlmssp_handle_neg_flags(ntlmssp_state
, neg_flags
, lp_lanman_auth());
535 /* Ask our caller what challenge they would like in the packet */
536 status
= ntlmssp_state
->get_challenge(ntlmssp_state
, cryptkey
);
537 if (!NT_STATUS_IS_OK(status
)) {
541 /* Check if we may set the challenge */
542 if (!ntlmssp_state
->may_set_challenge(ntlmssp_state
)) {
543 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_NTLM2
;
546 /* The flags we send back are not just the negotiated flags,
547 * they are also 'what is in this packet'. Therfore, we
548 * operate on 'chal_flags' from here on
551 chal_flags
= ntlmssp_state
->neg_flags
;
553 /* get the right name to fill in as 'target' */
554 target_name
= ntlmssp_target_name(ntlmssp_state
,
555 neg_flags
, &chal_flags
);
556 if (target_name
== NULL
)
557 return NT_STATUS_INVALID_PARAMETER
;
559 ntlmssp_state
->chal
= data_blob_talloc(ntlmssp_state
, cryptkey
, 8);
560 ntlmssp_state
->internal_chal
= data_blob_talloc(ntlmssp_state
,
563 /* This should be a 'netbios domain -> DNS domain' mapping */
564 dnsdomname
= get_mydnsdomname(ntlmssp_state
);
566 dnsdomname
= talloc_strdup(ntlmssp_state
, "");
569 return NT_STATUS_NO_MEMORY
;
571 strlower_m(dnsdomname
);
573 dnsname
= get_mydnsfullname();
578 /* This creates the 'blob' of names that appears at the end of the packet */
579 if (chal_flags
& NTLMSSP_NEGOTIATE_TARGET_INFO
)
581 msrpc_gen(ntlmssp_state
, &struct_blob
, "aaaaa",
582 MsvAvNbDomainName
, target_name
,
583 MsvAvNbComputerName
, ntlmssp_state
->get_global_myname(),
584 MsvAvDnsDomainName
, dnsdomname
,
585 MsvAvDnsComputerName
, dnsname
,
588 struct_blob
= data_blob_null
;
592 /* Marshel the packet in the right format, be it unicode or ASCII */
593 const char *gen_string
;
594 if (ntlmssp_state
->unicode
) {
595 gen_string
= "CdUdbddB";
597 gen_string
= "CdAdbddB";
600 msrpc_gen(ntlmssp_state
, reply
, gen_string
,
607 struct_blob
.data
, struct_blob
.length
);
609 if (DEBUGLEVEL
>= 10) {
610 if (NT_STATUS_IS_OK(ntlmssp_pull_CHALLENGE_MESSAGE(reply
,
615 NDR_PRINT_DEBUG(CHALLENGE_MESSAGE
, &challenge
);
620 data_blob_free(&struct_blob
);
622 ntlmssp_state
->expected_state
= NTLMSSP_AUTH
;
624 return NT_STATUS_MORE_PROCESSING_REQUIRED
;
628 * Next state function for the Authenticate packet
630 * @param ntlmssp_state NTLMSSP State
631 * @param request The request, as a DATA_BLOB
632 * @param request The reply, as an allocated DATA_BLOB, caller to free.
633 * @return Errors or NT_STATUS_OK.
636 static NTSTATUS
ntlmssp_server_auth(struct ntlmssp_state
*ntlmssp_state
,
637 const DATA_BLOB request
, DATA_BLOB
*reply
)
639 DATA_BLOB encrypted_session_key
= data_blob_null
;
640 DATA_BLOB user_session_key
= data_blob_null
;
641 DATA_BLOB lm_session_key
= data_blob_null
;
642 DATA_BLOB session_key
= data_blob_null
;
643 uint32 ntlmssp_command
, auth_flags
;
644 NTSTATUS nt_status
= NT_STATUS_OK
;
645 struct AUTHENTICATE_MESSAGE authenticate
;
648 bool doing_ntlm2
= False
;
650 uchar session_nonce
[16];
651 uchar session_nonce_hash
[16];
653 const char *parse_string
;
655 /* parse the NTLMSSP packet */
656 *reply
= data_blob_null
;
659 file_save("ntlmssp_auth.dat", request
.data
, request
.length
);
662 if (ntlmssp_state
->unicode
) {
663 parse_string
= "CdBBUUUBd";
665 parse_string
= "CdBBAAABd";
668 data_blob_free(&ntlmssp_state
->lm_resp
);
669 data_blob_free(&ntlmssp_state
->nt_resp
);
671 ntlmssp_state
->user
= NULL
;
672 ntlmssp_state
->domain
= NULL
;
673 ntlmssp_state
->workstation
= NULL
;
675 /* now the NTLMSSP encoded auth hashes */
676 if (!msrpc_parse(ntlmssp_state
, &request
, parse_string
,
679 &ntlmssp_state
->lm_resp
,
680 &ntlmssp_state
->nt_resp
,
681 &ntlmssp_state
->domain
,
682 &ntlmssp_state
->user
,
683 &ntlmssp_state
->workstation
,
684 &encrypted_session_key
,
688 /* Try again with a shorter string (Win9X truncates this packet) */
689 if (ntlmssp_state
->unicode
) {
690 parse_string
= "CdBBUUU";
692 parse_string
= "CdBBAAA";
695 /* now the NTLMSSP encoded auth hashes */
696 if (!msrpc_parse(ntlmssp_state
, &request
, parse_string
,
699 &ntlmssp_state
->lm_resp
,
700 &ntlmssp_state
->nt_resp
,
701 &ntlmssp_state
->domain
,
702 &ntlmssp_state
->user
,
703 &ntlmssp_state
->workstation
)) {
704 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP (tried both formats):\n"));
705 dump_data(2, request
.data
, request
.length
);
707 return NT_STATUS_INVALID_PARAMETER
;
712 ntlmssp_handle_neg_flags(ntlmssp_state
, auth_flags
, lp_lanman_auth());
714 if (DEBUGLEVEL
>= 10) {
715 if (NT_STATUS_IS_OK(ntlmssp_pull_AUTHENTICATE_MESSAGE(&request
,
720 NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE
, &authenticate
);
724 DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
725 ntlmssp_state
->user
, ntlmssp_state
->domain
, ntlmssp_state
->workstation
, (unsigned long)ntlmssp_state
->lm_resp
.length
, (unsigned long)ntlmssp_state
->nt_resp
.length
));
728 file_save("nthash1.dat", &ntlmssp_state
->nt_resp
.data
, &ntlmssp_state
->nt_resp
.length
);
729 file_save("lmhash1.dat", &ntlmssp_state
->lm_resp
.data
, &ntlmssp_state
->lm_resp
.length
);
732 /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
735 However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
737 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_NTLM2
) {
738 if (ntlmssp_state
->nt_resp
.length
== 24 && ntlmssp_state
->lm_resp
.length
== 24) {
739 struct MD5Context md5_session_nonce_ctx
;
740 SMB_ASSERT(ntlmssp_state
->internal_chal
.data
&& ntlmssp_state
->internal_chal
.length
== 8);
744 memcpy(session_nonce
, ntlmssp_state
->internal_chal
.data
, 8);
745 memcpy(&session_nonce
[8], ntlmssp_state
->lm_resp
.data
, 8);
747 MD5Init(&md5_session_nonce_ctx
);
748 MD5Update(&md5_session_nonce_ctx
, session_nonce
, 16);
749 MD5Final(session_nonce_hash
, &md5_session_nonce_ctx
);
751 ntlmssp_state
->chal
= data_blob_talloc(
752 ntlmssp_state
, session_nonce_hash
, 8);
754 /* LM response is no longer useful */
755 data_blob_free(&ntlmssp_state
->lm_resp
);
757 /* We changed the effective challenge - set it */
758 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_state
->set_challenge(ntlmssp_state
, &ntlmssp_state
->chal
))) {
759 data_blob_free(&encrypted_session_key
);
763 /* LM Key is incompatible. */
764 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_LM_KEY
;
769 * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
770 * is required (by "ntlm auth = no" and "lm auth = no" being set in the
771 * smb.conf file) and no NTLMv2 response was sent then the password check
772 * will fail here. JRA.
775 /* Finally, actually ask if the password is OK */
777 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_state
->check_password(ntlmssp_state
,
778 &user_session_key
, &lm_session_key
))) {
779 data_blob_free(&encrypted_session_key
);
783 dump_data_pw("NT session key:\n", user_session_key
.data
, user_session_key
.length
);
784 dump_data_pw("LM first-8:\n", lm_session_key
.data
, lm_session_key
.length
);
786 /* Handle the different session key derivation for NTLM2 */
788 if (user_session_key
.data
&& user_session_key
.length
== 16) {
789 session_key
= data_blob_talloc(ntlmssp_state
,
791 hmac_md5(user_session_key
.data
, session_nonce
,
792 sizeof(session_nonce
), session_key
.data
);
793 DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
794 dump_data_pw("NTLM2 session key:\n", session_key
.data
, session_key
.length
);
797 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
798 session_key
= data_blob_null
;
800 } else if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_LM_KEY
) {
801 if (lm_session_key
.data
&& lm_session_key
.length
>= 8) {
802 if (ntlmssp_state
->lm_resp
.data
&& ntlmssp_state
->lm_resp
.length
== 24) {
803 session_key
= data_blob_talloc(ntlmssp_state
,
805 if (session_key
.data
== NULL
) {
806 return NT_STATUS_NO_MEMORY
;
808 SMBsesskeygen_lm_sess_key(lm_session_key
.data
, ntlmssp_state
->lm_resp
.data
,
810 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
812 static const uint8 zeros
[24] = {0, };
813 session_key
= data_blob_talloc(
814 ntlmssp_state
, NULL
, 16);
815 if (session_key
.data
== NULL
) {
816 return NT_STATUS_NO_MEMORY
;
818 SMBsesskeygen_lm_sess_key(
819 lm_session_key
.data
, zeros
,
822 dump_data_pw("LM session key:\n", session_key
.data
,
825 DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
826 session_key
= data_blob_null
;
828 } else if (user_session_key
.data
) {
829 session_key
= user_session_key
;
830 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
831 dump_data_pw("unmodified session key:\n", session_key
.data
, session_key
.length
);
832 } else if (lm_session_key
.data
) {
833 session_key
= lm_session_key
;
834 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
835 dump_data_pw("unmodified session key:\n", session_key
.data
, session_key
.length
);
837 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
838 session_key
= data_blob_null
;
841 /* With KEY_EXCH, the client supplies the proposed session key,
842 but encrypts it with the long-term key */
843 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_KEY_EXCH
) {
844 if (!encrypted_session_key
.data
|| encrypted_session_key
.length
!= 16) {
845 data_blob_free(&encrypted_session_key
);
846 DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
847 (unsigned int)encrypted_session_key
.length
));
848 return NT_STATUS_INVALID_PARAMETER
;
849 } else if (!session_key
.data
|| session_key
.length
!= 16) {
850 DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
851 (unsigned int)session_key
.length
));
852 ntlmssp_state
->session_key
= session_key
;
854 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key
.data
, encrypted_session_key
.length
);
855 arcfour_crypt_blob(encrypted_session_key
.data
,
856 encrypted_session_key
.length
,
858 ntlmssp_state
->session_key
= data_blob_talloc(
859 ntlmssp_state
, encrypted_session_key
.data
,
860 encrypted_session_key
.length
);
861 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key
.data
,
862 encrypted_session_key
.length
);
865 ntlmssp_state
->session_key
= session_key
;
868 if (!NT_STATUS_IS_OK(nt_status
)) {
869 ntlmssp_state
->session_key
= data_blob_null
;
870 } else if (ntlmssp_state
->session_key
.length
) {
871 nt_status
= ntlmssp_sign_init(ntlmssp_state
);
874 data_blob_free(&encrypted_session_key
);
876 /* Only one authentication allowed per server state. */
877 ntlmssp_state
->expected_state
= NTLMSSP_DONE
;
883 * Create an NTLMSSP state machine
885 * @param ntlmssp_state NTLMSSP State, allocated by this function
888 NTSTATUS
ntlmssp_server_start(struct ntlmssp_state
**ntlmssp_state
)
890 *ntlmssp_state
= TALLOC_ZERO_P(NULL
, struct ntlmssp_state
);
891 if (!*ntlmssp_state
) {
892 DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
893 talloc_destroy(*ntlmssp_state
);
894 return NT_STATUS_NO_MEMORY
;
897 (*ntlmssp_state
)->role
= NTLMSSP_SERVER
;
899 (*ntlmssp_state
)->get_challenge
= get_challenge
;
900 (*ntlmssp_state
)->set_challenge
= set_challenge
;
901 (*ntlmssp_state
)->may_set_challenge
= may_set_challenge
;
903 (*ntlmssp_state
)->get_global_myname
= global_myname
;
904 (*ntlmssp_state
)->get_domain
= lp_workgroup
;
905 (*ntlmssp_state
)->server_role
= ROLE_DOMAIN_MEMBER
; /* a good default */
907 (*ntlmssp_state
)->expected_state
= NTLMSSP_NEGOTIATE
;
909 (*ntlmssp_state
)->neg_flags
=
910 NTLMSSP_NEGOTIATE_128
|
911 NTLMSSP_NEGOTIATE_56
|
912 NTLMSSP_NEGOTIATE_VERSION
|
913 NTLMSSP_NEGOTIATE_ALWAYS_SIGN
|
914 NTLMSSP_NEGOTIATE_NTLM
|
915 NTLMSSP_NEGOTIATE_NTLM2
|
916 NTLMSSP_NEGOTIATE_KEY_EXCH
|
917 NTLMSSP_NEGOTIATE_SIGN
|
918 NTLMSSP_NEGOTIATE_SEAL
;
923 /*********************************************************************
925 *********************************************************************/
928 * Next state function for the Initial packet
930 * @param ntlmssp_state NTLMSSP State
931 * @param request The request, as a DATA_BLOB. reply.data must be NULL
932 * @param request The reply, as an allocated DATA_BLOB, caller to free.
933 * @return Errors or NT_STATUS_OK.
936 static NTSTATUS
ntlmssp_client_initial(struct ntlmssp_state
*ntlmssp_state
,
937 DATA_BLOB reply
, DATA_BLOB
*next_request
)
939 struct NEGOTIATE_MESSAGE negotiate
;
941 if (ntlmssp_state
->unicode
) {
942 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_UNICODE
;
944 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_OEM
;
947 if (ntlmssp_state
->use_ntlmv2
) {
948 ntlmssp_state
->neg_flags
|= NTLMSSP_NEGOTIATE_NTLM2
;
951 /* generate the ntlmssp negotiate packet */
952 msrpc_gen(ntlmssp_state
, next_request
, "CddAA",
955 ntlmssp_state
->neg_flags
,
956 ntlmssp_state
->get_domain(),
957 ntlmssp_state
->get_global_myname());
959 if (DEBUGLEVEL
>= 10) {
960 if (NT_STATUS_IS_OK(ntlmssp_pull_NEGOTIATE_MESSAGE(next_request
,
965 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE
, &negotiate
);
969 ntlmssp_state
->expected_state
= NTLMSSP_CHALLENGE
;
971 return NT_STATUS_MORE_PROCESSING_REQUIRED
;
975 * Next state function for the Challenge Packet. Generate an auth packet.
977 * @param ntlmssp_state NTLMSSP State
978 * @param request The request, as a DATA_BLOB. reply.data must be NULL
979 * @param request The reply, as an allocated DATA_BLOB, caller to free.
980 * @return Errors or NT_STATUS_OK.
983 static NTSTATUS
ntlmssp_client_challenge(struct ntlmssp_state
*ntlmssp_state
,
984 const DATA_BLOB reply
, DATA_BLOB
*next_request
)
986 uint32 chal_flags
, ntlmssp_command
, unkn1
, unkn2
;
987 DATA_BLOB server_domain_blob
;
988 DATA_BLOB challenge_blob
;
989 DATA_BLOB struct_blob
= data_blob_null
;
991 const char *chal_parse_string
;
992 const char *auth_gen_string
;
993 DATA_BLOB lm_response
= data_blob_null
;
994 DATA_BLOB nt_response
= data_blob_null
;
995 DATA_BLOB session_key
= data_blob_null
;
996 DATA_BLOB encrypted_session_key
= data_blob_null
;
997 NTSTATUS nt_status
= NT_STATUS_OK
;
998 struct CHALLENGE_MESSAGE challenge
;
999 struct AUTHENTICATE_MESSAGE authenticate
;
1001 if (ntlmssp_state
->use_ccache
) {
1002 struct wbcCredentialCacheParams params
;
1003 struct wbcCredentialCacheInfo
*info
= NULL
;
1004 struct wbcAuthErrorInfo
*error
= NULL
;
1005 struct wbcNamedBlob auth_blob
;
1006 struct wbcBlob
*wbc_next
= NULL
;
1007 struct wbcBlob
*wbc_session_key
= NULL
;
1011 params
.account_name
= ntlmssp_state
->user
;
1012 params
.domain_name
= ntlmssp_state
->domain
;
1013 params
.level
= WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP
;
1015 auth_blob
.name
= "challenge_blob";
1016 auth_blob
.flags
= 0;
1017 auth_blob
.blob
.data
= reply
.data
;
1018 auth_blob
.blob
.length
= reply
.length
;
1019 params
.num_blobs
= 1;
1020 params
.blobs
= &auth_blob
;
1022 wbc_status
= wbcCredentialCache(¶ms
, &info
, &error
);
1023 if (error
!= NULL
) {
1024 wbcFreeMemory(error
);
1026 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1030 for (i
=0; i
<info
->num_blobs
; i
++) {
1031 if (strequal(info
->blobs
[i
].name
, "auth_blob")) {
1032 wbc_next
= &info
->blobs
[i
].blob
;
1034 if (strequal(info
->blobs
[i
].name
, "session_key")) {
1035 wbc_session_key
= &info
->blobs
[i
].blob
;
1038 if ((wbc_next
== NULL
) || (wbc_session_key
== NULL
)) {
1039 wbcFreeMemory(info
);
1043 *next_request
= data_blob(wbc_next
->data
, wbc_next
->length
);
1044 ntlmssp_state
->session_key
= data_blob(
1045 wbc_session_key
->data
, wbc_session_key
->length
);
1047 wbcFreeMemory(info
);
1053 if (!msrpc_parse(ntlmssp_state
, &reply
, "CdBd",
1056 &server_domain_blob
,
1058 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
1059 dump_data(2, reply
.data
, reply
.length
);
1061 return NT_STATUS_INVALID_PARAMETER
;
1064 if (DEBUGLEVEL
>= 10) {
1065 if (NT_STATUS_IS_OK(ntlmssp_pull_CHALLENGE_MESSAGE(&reply
,
1070 NDR_PRINT_DEBUG(CHALLENGE_MESSAGE
, &challenge
);
1074 data_blob_free(&server_domain_blob
);
1076 DEBUG(3, ("Got challenge flags:\n"));
1077 debug_ntlmssp_flags(chal_flags
);
1079 ntlmssp_handle_neg_flags(ntlmssp_state
, chal_flags
, lp_client_lanman_auth());
1081 if (ntlmssp_state
->unicode
) {
1082 if (chal_flags
& NTLMSSP_NEGOTIATE_TARGET_INFO
) {
1083 chal_parse_string
= "CdUdbddB";
1085 chal_parse_string
= "CdUdbdd";
1087 auth_gen_string
= "CdBBUUUBd";
1089 if (chal_flags
& NTLMSSP_NEGOTIATE_TARGET_INFO
) {
1090 chal_parse_string
= "CdAdbddB";
1092 chal_parse_string
= "CdAdbdd";
1095 auth_gen_string
= "CdBBAAABd";
1098 DEBUG(3, ("NTLMSSP: Set final flags:\n"));
1099 debug_ntlmssp_flags(ntlmssp_state
->neg_flags
);
1101 if (!msrpc_parse(ntlmssp_state
, &reply
, chal_parse_string
,
1109 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
1110 dump_data(2, reply
.data
, reply
.length
);
1111 return NT_STATUS_INVALID_PARAMETER
;
1114 ntlmssp_state
->server_domain
= server_domain
;
1116 if (challenge_blob
.length
!= 8) {
1117 data_blob_free(&struct_blob
);
1118 return NT_STATUS_INVALID_PARAMETER
;
1121 if (!ntlmssp_state
->nt_hash
|| !ntlmssp_state
->lm_hash
) {
1122 static const uint8_t zeros
[16] = {0, };
1123 /* do nothing - blobs are zero length */
1125 /* session key is all zeros */
1126 session_key
= data_blob_talloc(ntlmssp_state
, zeros
, 16);
1128 /* not doing NLTM2 without a password */
1129 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_NTLM2
;
1130 } else if (ntlmssp_state
->use_ntlmv2
) {
1131 if (!struct_blob
.length
) {
1132 /* be lazy, match win2k - we can't do NTLMv2 without it */
1133 DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
1134 return NT_STATUS_INVALID_PARAMETER
;
1137 /* TODO: if the remote server is standalone, then we should replace 'domain'
1138 with the server name as supplied above */
1140 if (!SMBNTLMv2encrypt_hash(ntlmssp_state
,
1141 ntlmssp_state
->user
,
1142 ntlmssp_state
->domain
,
1143 ntlmssp_state
->nt_hash
, &challenge_blob
,
1145 &lm_response
, &nt_response
, NULL
,
1147 data_blob_free(&challenge_blob
);
1148 data_blob_free(&struct_blob
);
1149 return NT_STATUS_NO_MEMORY
;
1151 } else if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_NTLM2
) {
1152 struct MD5Context md5_session_nonce_ctx
;
1153 uchar session_nonce
[16];
1154 uchar session_nonce_hash
[16];
1155 uchar user_session_key
[16];
1157 lm_response
= data_blob_talloc(ntlmssp_state
, NULL
, 24);
1158 generate_random_buffer(lm_response
.data
, 8);
1159 memset(lm_response
.data
+8, 0, 16);
1161 memcpy(session_nonce
, challenge_blob
.data
, 8);
1162 memcpy(&session_nonce
[8], lm_response
.data
, 8);
1164 MD5Init(&md5_session_nonce_ctx
);
1165 MD5Update(&md5_session_nonce_ctx
, challenge_blob
.data
, 8);
1166 MD5Update(&md5_session_nonce_ctx
, lm_response
.data
, 8);
1167 MD5Final(session_nonce_hash
, &md5_session_nonce_ctx
);
1169 DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
1170 DEBUG(5, ("challenge is: \n"));
1171 dump_data(5, session_nonce_hash
, 8);
1173 nt_response
= data_blob_talloc(ntlmssp_state
, NULL
, 24);
1174 SMBNTencrypt_hash(ntlmssp_state
->nt_hash
,
1178 session_key
= data_blob_talloc(ntlmssp_state
, NULL
, 16);
1180 SMBsesskeygen_ntv1(ntlmssp_state
->nt_hash
, user_session_key
);
1181 hmac_md5(user_session_key
, session_nonce
, sizeof(session_nonce
), session_key
.data
);
1182 dump_data_pw("NTLM2 session key:\n", session_key
.data
, session_key
.length
);
1184 /* lanman auth is insecure, it may be disabled */
1185 if (lp_client_lanman_auth()) {
1186 lm_response
= data_blob_talloc(ntlmssp_state
,
1188 SMBencrypt_hash(ntlmssp_state
->lm_hash
,challenge_blob
.data
,
1192 nt_response
= data_blob_talloc(ntlmssp_state
, NULL
, 24);
1193 SMBNTencrypt_hash(ntlmssp_state
->nt_hash
,challenge_blob
.data
,
1196 session_key
= data_blob_talloc(ntlmssp_state
, NULL
, 16);
1197 if ((ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_LM_KEY
)
1198 && lp_client_lanman_auth()) {
1199 SMBsesskeygen_lm_sess_key(ntlmssp_state
->lm_hash
, lm_response
.data
,
1201 dump_data_pw("LM session key\n", session_key
.data
, session_key
.length
);
1203 SMBsesskeygen_ntv1(ntlmssp_state
->nt_hash
, session_key
.data
);
1204 dump_data_pw("NT session key:\n", session_key
.data
, session_key
.length
);
1207 data_blob_free(&struct_blob
);
1209 /* Key exchange encryptes a new client-generated session key with
1210 the password-derived key */
1211 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_KEY_EXCH
) {
1212 /* Make up a new session key */
1213 uint8 client_session_key
[16];
1214 generate_random_buffer(client_session_key
, sizeof(client_session_key
));
1216 /* Encrypt the new session key with the old one */
1217 encrypted_session_key
= data_blob(client_session_key
, sizeof(client_session_key
));
1218 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key
.data
, encrypted_session_key
.length
);
1219 arcfour_crypt_blob(encrypted_session_key
.data
, encrypted_session_key
.length
, &session_key
);
1220 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key
.data
, encrypted_session_key
.length
);
1222 /* Mark the new session key as the 'real' session key */
1223 data_blob_free(&session_key
);
1224 session_key
= data_blob_talloc(ntlmssp_state
,
1226 sizeof(client_session_key
));
1229 /* this generates the actual auth packet */
1230 if (!msrpc_gen(ntlmssp_state
, next_request
, auth_gen_string
,
1233 lm_response
.data
, lm_response
.length
,
1234 nt_response
.data
, nt_response
.length
,
1235 ntlmssp_state
->domain
,
1236 ntlmssp_state
->user
,
1237 ntlmssp_state
->get_global_myname(),
1238 encrypted_session_key
.data
, encrypted_session_key
.length
,
1239 ntlmssp_state
->neg_flags
)) {
1241 return NT_STATUS_NO_MEMORY
;
1244 if (DEBUGLEVEL
>= 10) {
1245 if (NT_STATUS_IS_OK(ntlmssp_pull_AUTHENTICATE_MESSAGE(next_request
,
1250 NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE
, &authenticate
);
1254 data_blob_free(&encrypted_session_key
);
1256 data_blob_free(&ntlmssp_state
->chal
);
1258 ntlmssp_state
->session_key
= session_key
;
1260 ntlmssp_state
->chal
= challenge_blob
;
1261 ntlmssp_state
->lm_resp
= lm_response
;
1262 ntlmssp_state
->nt_resp
= nt_response
;
1266 ntlmssp_state
->expected_state
= NTLMSSP_DONE
;
1268 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_sign_init(ntlmssp_state
))) {
1269 DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n", nt_errstr(nt_status
)));
1275 NTSTATUS
ntlmssp_client_start(struct ntlmssp_state
**ntlmssp_state
)
1277 *ntlmssp_state
= TALLOC_ZERO_P(NULL
, struct ntlmssp_state
);
1278 if (!*ntlmssp_state
) {
1279 DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
1280 talloc_destroy(*ntlmssp_state
);
1281 return NT_STATUS_NO_MEMORY
;
1284 (*ntlmssp_state
)->role
= NTLMSSP_CLIENT
;
1286 (*ntlmssp_state
)->get_global_myname
= global_myname
;
1287 (*ntlmssp_state
)->get_domain
= lp_workgroup
;
1289 (*ntlmssp_state
)->unicode
= True
;
1291 (*ntlmssp_state
)->use_ntlmv2
= lp_client_ntlmv2_auth();
1293 (*ntlmssp_state
)->expected_state
= NTLMSSP_INITIAL
;
1295 (*ntlmssp_state
)->neg_flags
=
1296 NTLMSSP_NEGOTIATE_128
|
1297 NTLMSSP_NEGOTIATE_ALWAYS_SIGN
|
1298 NTLMSSP_NEGOTIATE_NTLM
|
1299 NTLMSSP_NEGOTIATE_NTLM2
|
1300 NTLMSSP_NEGOTIATE_KEY_EXCH
|
1301 NTLMSSP_REQUEST_TARGET
;
1303 return NT_STATUS_OK
;