2 Unix SMB/CIFS implementation.
3 Samba memory buffer functions
4 Copyright (C) Andrew Tridgell 1992-1997
5 Copyright (C) Luke Kenneth Casson Leighton 1996-1997
6 Copyright (C) Jeremy Allison 1999
7 Copyright (C) Andrew Bartlett 2003.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #define DBGC_CLASS DBGC_RPC_PARSE
29 * Dump a prs to a file: from the current location through to the end.
31 void prs_dump(const char *name
, int v
, prs_struct
*ps
)
33 prs_dump_region(name
, v
, ps
, ps
->data_offset
, ps
->buffer_size
);
37 * Dump from the start of the prs to the current location.
39 void prs_dump_before(const char *name
, int v
, prs_struct
*ps
)
41 prs_dump_region(name
, v
, ps
, 0, ps
->data_offset
);
45 * Dump everything from the start of the prs up to the current location.
47 void prs_dump_region(const char *name
, int v
, prs_struct
*ps
,
48 int from_off
, int to_off
)
53 if (DEBUGLEVEL
< 50) return;
56 if (asprintf(&fname
,"/tmp/%s_%d.%d.prs", name
, v
, i
) < 0) {
60 if (asprintf(&fname
,"/tmp/%s.%d.prs", name
, i
) < 0) {
64 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
65 if (fd
!= -1 || errno
!= EEXIST
) break;
68 sz
= write(fd
, ps
->data_p
+ from_off
, to_off
- from_off
);
70 if ( (sz
!= to_off
-from_off
) || (i
!= 0) ) {
71 DEBUG(0,("Error writing/closing %s: %ld!=%ld %d\n", fname
, (unsigned long)sz
, (unsigned long)to_off
-from_off
, i
));
73 DEBUG(0,("created %s\n", fname
));
79 /*******************************************************************
80 Debug output for parsing info
82 XXXX side-effect of this function is to increase the debug depth XXXX.
84 ********************************************************************/
86 void prs_debug(prs_struct
*ps
, int depth
, const char *desc
, const char *fn_name
)
88 DEBUG(5+depth
, ("%s%06x %s %s\n", tab_depth(5+depth
,depth
), ps
->data_offset
, fn_name
, desc
));
92 * Initialise an expandable parse structure.
94 * @param size Initial buffer size. If >0, a new buffer will be
95 * created with malloc().
97 * @return False if allocation fails, otherwise True.
100 bool prs_init(prs_struct
*ps
, uint32 size
, TALLOC_CTX
*ctx
, bool io
)
104 ps
->bigendian_data
= RPC_LITTLE_ENDIAN
;
105 ps
->align
= RPC_PARSE_ALIGN
;
106 ps
->is_dynamic
= False
;
113 ps
->buffer_size
= size
;
114 if((ps
->data_p
= (char *)SMB_MALLOC((size_t)size
)) == NULL
) {
115 DEBUG(0,("prs_init: malloc fail for %u bytes.\n", (unsigned int)size
));
118 memset(ps
->data_p
, '\0', (size_t)size
);
119 ps
->is_dynamic
= True
; /* We own this memory. */
120 } else if (MARSHALLING(ps
)) {
121 /* If size is zero and we're marshalling we should allocate memory on demand. */
122 ps
->is_dynamic
= True
;
128 /*******************************************************************
129 Delete the memory in a parse structure - if we own it.
131 NOTE: Contrary to the somewhat confusing naming, this function is not
132 intended for freeing memory allocated by prs_alloc_mem(). That memory
133 is attached to the talloc context given by ps->mem_ctx.
134 ********************************************************************/
136 void prs_mem_free(prs_struct
*ps
)
139 SAFE_FREE(ps
->data_p
);
140 ps
->is_dynamic
= False
;
145 /*******************************************************************
146 Clear the memory in a parse structure.
147 ********************************************************************/
149 void prs_mem_clear(prs_struct
*ps
)
152 memset(ps
->data_p
, '\0', (size_t)ps
->buffer_size
);
155 /*******************************************************************
156 Allocate memory when unmarshalling... Always zero clears.
157 ********************************************************************/
159 #if defined(PARANOID_MALLOC_CHECKER)
160 char *prs_alloc_mem_(prs_struct
*ps
, size_t size
, unsigned int count
)
162 char *prs_alloc_mem(prs_struct
*ps
, size_t size
, unsigned int count
)
168 /* We can't call the type-safe version here. */
169 ret
= (char *)_talloc_zero_array(ps
->mem_ctx
, size
, count
,
175 /*******************************************************************
176 Return the current talloc context we're using.
177 ********************************************************************/
179 TALLOC_CTX
*prs_get_mem_context(prs_struct
*ps
)
184 /*******************************************************************
185 Hand some already allocated memory to a prs_struct.
186 ********************************************************************/
188 void prs_give_memory(prs_struct
*ps
, char *buf
, uint32 size
, bool is_dynamic
)
190 ps
->is_dynamic
= is_dynamic
;
192 ps
->buffer_size
= size
;
195 /*******************************************************************
196 Take some memory back from a prs_struct.
197 ********************************************************************/
199 char *prs_take_memory(prs_struct
*ps
, uint32
*psize
)
201 char *ret
= ps
->data_p
;
203 *psize
= ps
->buffer_size
;
204 ps
->is_dynamic
= False
;
209 /*******************************************************************
210 Set a prs_struct to exactly a given size. Will grow or tuncate if neccessary.
211 ********************************************************************/
213 bool prs_set_buffer_size(prs_struct
*ps
, uint32 newsize
)
215 if (newsize
> ps
->buffer_size
)
216 return prs_force_grow(ps
, newsize
- ps
->buffer_size
);
218 if (newsize
< ps
->buffer_size
) {
219 ps
->buffer_size
= newsize
;
221 /* newsize == 0 acts as a free and set pointer to NULL */
223 SAFE_FREE(ps
->data_p
);
225 ps
->data_p
= (char *)SMB_REALLOC(ps
->data_p
, newsize
);
227 if (ps
->data_p
== NULL
) {
228 DEBUG(0,("prs_set_buffer_size: Realloc failure for size %u.\n",
229 (unsigned int)newsize
));
230 DEBUG(0,("prs_set_buffer_size: Reason %s\n",strerror(errno
)));
239 /*******************************************************************
240 Attempt, if needed, to grow a data buffer.
241 Also depends on the data stream mode (io).
242 ********************************************************************/
244 bool prs_grow(prs_struct
*ps
, uint32 extra_space
)
248 ps
->grow_size
= MAX(ps
->grow_size
, ps
->data_offset
+ extra_space
);
250 if(ps
->data_offset
+ extra_space
<= ps
->buffer_size
)
254 * We cannot grow the buffer if we're not reading
255 * into the prs_struct, or if we don't own the memory.
258 if(UNMARSHALLING(ps
) || !ps
->is_dynamic
) {
259 DEBUG(0,("prs_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
260 (unsigned int)extra_space
));
265 * Decide how much extra space we really need.
268 extra_space
-= (ps
->buffer_size
- ps
->data_offset
);
269 if(ps
->buffer_size
== 0) {
271 * Ensure we have at least a PDU's length, or extra_space, whichever
275 new_size
= MAX(RPC_MAX_PDU_FRAG_LEN
,extra_space
);
277 if((ps
->data_p
= (char *)SMB_MALLOC(new_size
)) == NULL
) {
278 DEBUG(0,("prs_grow: Malloc failure for size %u.\n", (unsigned int)new_size
));
281 memset(ps
->data_p
, '\0', (size_t)new_size
);
284 * If the current buffer size is bigger than the space needed, just
285 * double it, else add extra_space.
287 new_size
= MAX(ps
->buffer_size
*2, ps
->buffer_size
+ extra_space
);
289 if ((ps
->data_p
= (char *)SMB_REALLOC(ps
->data_p
, new_size
)) == NULL
) {
290 DEBUG(0,("prs_grow: Realloc failure for size %u.\n",
291 (unsigned int)new_size
));
295 memset(&ps
->data_p
[ps
->buffer_size
], '\0', (size_t)(new_size
- ps
->buffer_size
));
297 ps
->buffer_size
= new_size
;
302 /*******************************************************************
303 Attempt to force a data buffer to grow by len bytes.
304 This is only used when appending more data onto a prs_struct
305 when reading an rpc reply, before unmarshalling it.
306 ********************************************************************/
308 bool prs_force_grow(prs_struct
*ps
, uint32 extra_space
)
310 uint32 new_size
= ps
->buffer_size
+ extra_space
;
312 if(!UNMARSHALLING(ps
) || !ps
->is_dynamic
) {
313 DEBUG(0,("prs_force_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
314 (unsigned int)extra_space
));
318 if((ps
->data_p
= (char *)SMB_REALLOC(ps
->data_p
, new_size
)) == NULL
) {
319 DEBUG(0,("prs_force_grow: Realloc failure for size %u.\n",
320 (unsigned int)new_size
));
324 memset(&ps
->data_p
[ps
->buffer_size
], '\0', (size_t)(new_size
- ps
->buffer_size
));
326 ps
->buffer_size
= new_size
;
331 /*******************************************************************
332 Get the data pointer (external interface).
333 ********************************************************************/
335 char *prs_data_p(prs_struct
*ps
)
340 /*******************************************************************
341 Get the current data size (external interface).
342 ********************************************************************/
344 uint32
prs_data_size(prs_struct
*ps
)
346 return ps
->buffer_size
;
349 /*******************************************************************
350 Fetch the current offset (external interface).
351 ********************************************************************/
353 uint32
prs_offset(prs_struct
*ps
)
355 return ps
->data_offset
;
358 /*******************************************************************
359 Set the current offset (external interface).
360 ********************************************************************/
362 bool prs_set_offset(prs_struct
*ps
, uint32 offset
)
364 if(offset
<= ps
->data_offset
) {
365 ps
->data_offset
= offset
;
369 if(!prs_grow(ps
, offset
- ps
->data_offset
))
372 ps
->data_offset
= offset
;
376 /*******************************************************************
377 Append the data from one parse_struct into another.
378 ********************************************************************/
380 bool prs_append_prs_data(prs_struct
*dst
, prs_struct
*src
)
382 if (prs_offset(src
) == 0)
385 if(!prs_grow(dst
, prs_offset(src
)))
388 memcpy(&dst
->data_p
[dst
->data_offset
], src
->data_p
, (size_t)prs_offset(src
));
389 dst
->data_offset
+= prs_offset(src
);
394 /*******************************************************************
395 Append some data from one parse_struct into another.
396 ********************************************************************/
398 bool prs_append_some_prs_data(prs_struct
*dst
, prs_struct
*src
, int32 start
, uint32 len
)
403 if(!prs_grow(dst
, len
))
406 memcpy(&dst
->data_p
[dst
->data_offset
], src
->data_p
+ start
, (size_t)len
);
407 dst
->data_offset
+= len
;
412 /*******************************************************************
413 Append the data from a buffer into a parse_struct.
414 ********************************************************************/
416 bool prs_copy_data_in(prs_struct
*dst
, const char *src
, uint32 len
)
421 if(!prs_grow(dst
, len
))
424 memcpy(&dst
->data_p
[dst
->data_offset
], src
, (size_t)len
);
425 dst
->data_offset
+= len
;
430 /*******************************************************************
431 Copy some data from a parse_struct into a buffer.
432 ********************************************************************/
434 bool prs_copy_data_out(char *dst
, prs_struct
*src
, uint32 len
)
439 if(!prs_mem_get(src
, len
))
442 memcpy(dst
, &src
->data_p
[src
->data_offset
], (size_t)len
);
443 src
->data_offset
+= len
;
448 /*******************************************************************
449 Copy all the data from a parse_struct into a buffer.
450 ********************************************************************/
452 bool prs_copy_all_data_out(char *dst
, prs_struct
*src
)
454 uint32 len
= prs_offset(src
);
459 prs_set_offset(src
, 0);
460 return prs_copy_data_out(dst
, src
, len
);
463 /*******************************************************************
464 Set the data as X-endian (external interface).
465 ********************************************************************/
467 void prs_set_endian_data(prs_struct
*ps
, bool endian
)
469 ps
->bigendian_data
= endian
;
472 /*******************************************************************
473 Align a the data_len to a multiple of align bytes - filling with
475 ********************************************************************/
477 bool prs_align(prs_struct
*ps
)
479 uint32 mod
= ps
->data_offset
& (ps
->align
-1);
481 if (ps
->align
!= 0 && mod
!= 0) {
482 uint32 extra_space
= (ps
->align
- mod
);
483 if(!prs_grow(ps
, extra_space
))
485 memset(&ps
->data_p
[ps
->data_offset
], '\0', (size_t)extra_space
);
486 ps
->data_offset
+= extra_space
;
492 /******************************************************************
493 Align on a 2 byte boundary
494 *****************************************************************/
496 bool prs_align_uint16(prs_struct
*ps
)
499 uint8 old_align
= ps
->align
;
503 ps
->align
= old_align
;
508 /******************************************************************
509 Align on a 8 byte boundary
510 *****************************************************************/
512 bool prs_align_uint64(prs_struct
*ps
)
515 uint8 old_align
= ps
->align
;
519 ps
->align
= old_align
;
524 /******************************************************************
525 Align on a specific byte boundary
526 *****************************************************************/
528 bool prs_align_custom(prs_struct
*ps
, uint8 boundary
)
531 uint8 old_align
= ps
->align
;
533 ps
->align
= boundary
;
535 ps
->align
= old_align
;
542 /*******************************************************************
543 Align only if required (for the unistr2 string mainly)
544 ********************************************************************/
546 bool prs_align_needed(prs_struct
*ps
, uint32 needed
)
551 return prs_align(ps
);
554 /*******************************************************************
555 Ensure we can read/write to a given offset.
556 ********************************************************************/
558 char *prs_mem_get(prs_struct
*ps
, uint32 extra_size
)
560 if(UNMARSHALLING(ps
)) {
562 * If reading, ensure that we can read the requested size item.
564 if (ps
->data_offset
+ extra_size
> ps
->buffer_size
) {
565 DEBUG(0,("prs_mem_get: reading data of size %u would overrun "
566 "buffer by %u bytes.\n",
567 (unsigned int)extra_size
,
568 (unsigned int)(ps
->data_offset
+ extra_size
- ps
->buffer_size
) ));
573 * Writing - grow the buffer if needed.
575 if(!prs_grow(ps
, extra_size
))
578 return &ps
->data_p
[ps
->data_offset
];
581 /*******************************************************************
582 Change the struct type.
583 ********************************************************************/
585 void prs_switch_type(prs_struct
*ps
, bool io
)
587 if ((ps
->io
^ io
) == True
)
591 /*******************************************************************
592 Force a prs_struct to be dynamic even when it's size is 0.
593 ********************************************************************/
595 void prs_force_dynamic(prs_struct
*ps
)
600 /*******************************************************************
601 Associate a session key with a parse struct.
602 ********************************************************************/
604 void prs_set_session_key(prs_struct
*ps
, const char sess_key
[16])
606 ps
->sess_key
= sess_key
;
609 /*******************************************************************
611 ********************************************************************/
613 bool prs_uint8(const char *name
, prs_struct
*ps
, int depth
, uint8
*data8
)
615 char *q
= prs_mem_get(ps
, 1);
619 if (UNMARSHALLING(ps
))
624 DEBUG(5,("%s%04x %s: %02x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data8
));
626 ps
->data_offset
+= 1;
631 /*******************************************************************
632 Stream a uint16* (allocate memory if unmarshalling)
633 ********************************************************************/
635 bool prs_pointer( const char *name
, prs_struct
*ps
, int depth
,
636 void *dta
, size_t data_size
,
637 bool (*prs_fn
)(const char*, prs_struct
*, int, void*) )
639 void ** data
= (void **)dta
;
642 /* output f000baaa to stream if the pointer is non-zero. */
644 data_p
= *data
? 0xf000baaa : 0;
646 if ( !prs_uint32("ptr", ps
, depth
, &data_p
))
649 /* we're done if there is no data */
654 if (UNMARSHALLING(ps
)) {
656 if ( !(*data
= PRS_ALLOC_MEM(ps
, char, data_size
)) )
663 return prs_fn(name
, ps
, depth
, *data
);
667 /*******************************************************************
669 ********************************************************************/
671 bool prs_uint16(const char *name
, prs_struct
*ps
, int depth
, uint16
*data16
)
673 char *q
= prs_mem_get(ps
, sizeof(uint16
));
677 if (UNMARSHALLING(ps
)) {
678 if (ps
->bigendian_data
)
679 *data16
= RSVAL(q
,0);
683 if (ps
->bigendian_data
)
689 DEBUG(5,("%s%04x %s: %04x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data16
));
691 ps
->data_offset
+= sizeof(uint16
);
696 /*******************************************************************
698 ********************************************************************/
700 bool prs_uint32(const char *name
, prs_struct
*ps
, int depth
, uint32
*data32
)
702 char *q
= prs_mem_get(ps
, sizeof(uint32
));
706 if (UNMARSHALLING(ps
)) {
707 if (ps
->bigendian_data
)
708 *data32
= RIVAL(q
,0);
712 if (ps
->bigendian_data
)
718 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data32
));
720 ps
->data_offset
+= sizeof(uint32
);
725 /*******************************************************************
727 ********************************************************************/
729 bool prs_int32(const char *name
, prs_struct
*ps
, int depth
, int32
*data32
)
731 char *q
= prs_mem_get(ps
, sizeof(int32
));
735 if (UNMARSHALLING(ps
)) {
736 if (ps
->bigendian_data
)
737 *data32
= RIVALS(q
,0);
739 *data32
= IVALS(q
,0);
741 if (ps
->bigendian_data
)
742 RSIVALS(q
,0,*data32
);
747 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data32
));
749 ps
->data_offset
+= sizeof(int32
);
754 /*******************************************************************
756 ********************************************************************/
758 bool prs_ntstatus(const char *name
, prs_struct
*ps
, int depth
, NTSTATUS
*status
)
760 char *q
= prs_mem_get(ps
, sizeof(uint32
));
764 if (UNMARSHALLING(ps
)) {
765 if (ps
->bigendian_data
)
766 *status
= NT_STATUS(RIVAL(q
,0));
768 *status
= NT_STATUS(IVAL(q
,0));
770 if (ps
->bigendian_data
)
771 RSIVAL(q
,0,NT_STATUS_V(*status
));
773 SIVAL(q
,0,NT_STATUS_V(*status
));
776 DEBUG(5,("%s%04x %s: %s\n", tab_depth(5,depth
), ps
->data_offset
, name
,
777 nt_errstr(*status
)));
779 ps
->data_offset
+= sizeof(uint32
);
784 /*******************************************************************
785 Stream a DCE error code
786 ********************************************************************/
788 bool prs_dcerpc_status(const char *name
, prs_struct
*ps
, int depth
, NTSTATUS
*status
)
790 char *q
= prs_mem_get(ps
, sizeof(uint32
));
794 if (UNMARSHALLING(ps
)) {
795 if (ps
->bigendian_data
)
796 *status
= NT_STATUS(RIVAL(q
,0));
798 *status
= NT_STATUS(IVAL(q
,0));
800 if (ps
->bigendian_data
)
801 RSIVAL(q
,0,NT_STATUS_V(*status
));
803 SIVAL(q
,0,NT_STATUS_V(*status
));
806 DEBUG(5,("%s%04x %s: %s\n", tab_depth(5,depth
), ps
->data_offset
, name
,
807 dcerpc_errstr(NT_STATUS_V(*status
))));
809 ps
->data_offset
+= sizeof(uint32
);
815 /*******************************************************************
817 ********************************************************************/
819 bool prs_werror(const char *name
, prs_struct
*ps
, int depth
, WERROR
*status
)
821 char *q
= prs_mem_get(ps
, sizeof(uint32
));
825 if (UNMARSHALLING(ps
)) {
826 if (ps
->bigendian_data
)
827 *status
= W_ERROR(RIVAL(q
,0));
829 *status
= W_ERROR(IVAL(q
,0));
831 if (ps
->bigendian_data
)
832 RSIVAL(q
,0,W_ERROR_V(*status
));
834 SIVAL(q
,0,W_ERROR_V(*status
));
837 DEBUG(5,("%s%04x %s: %s\n", tab_depth(5,depth
), ps
->data_offset
, name
,
838 dos_errstr(*status
)));
840 ps
->data_offset
+= sizeof(uint32
);
846 /******************************************************************
847 Stream an array of uint8s. Length is number of uint8s.
848 ********************************************************************/
850 bool prs_uint8s(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint8
*data8s
, int len
)
853 char *q
= prs_mem_get(ps
, len
);
857 if (UNMARSHALLING(ps
)) {
858 for (i
= 0; i
< len
; i
++)
859 data8s
[i
] = CVAL(q
,i
);
861 for (i
= 0; i
< len
; i
++)
862 SCVAL(q
, i
, data8s
[i
]);
865 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
,name
));
867 print_asc(5, (unsigned char*)data8s
, len
);
869 for (i
= 0; i
< len
; i
++)
870 DEBUG(5,("%02x ", data8s
[i
]));
874 ps
->data_offset
+= len
;
879 /******************************************************************
880 Stream an array of uint16s. Length is number of uint16s.
881 ********************************************************************/
883 bool prs_uint16s(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
886 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
890 if (UNMARSHALLING(ps
)) {
891 if (ps
->bigendian_data
) {
892 for (i
= 0; i
< len
; i
++)
893 data16s
[i
] = RSVAL(q
, 2*i
);
895 for (i
= 0; i
< len
; i
++)
896 data16s
[i
] = SVAL(q
, 2*i
);
899 if (ps
->bigendian_data
) {
900 for (i
= 0; i
< len
; i
++)
901 RSSVAL(q
, 2*i
, data16s
[i
]);
903 for (i
= 0; i
< len
; i
++)
904 SSVAL(q
, 2*i
, data16s
[i
]);
908 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
910 print_asc(5, (unsigned char*)data16s
, 2*len
);
912 for (i
= 0; i
< len
; i
++)
913 DEBUG(5,("%04x ", data16s
[i
]));
917 ps
->data_offset
+= (len
* sizeof(uint16
));
922 /******************************************************************
923 Start using a function for streaming unicode chars. If unmarshalling,
924 output must be little-endian, if marshalling, input must be little-endian.
925 ********************************************************************/
927 static void dbg_rw_punival(bool charmode
, const char *name
, int depth
, prs_struct
*ps
,
928 char *in_buf
, char *out_buf
, int len
)
932 if (UNMARSHALLING(ps
)) {
933 if (ps
->bigendian_data
) {
934 for (i
= 0; i
< len
; i
++)
935 SSVAL(out_buf
,2*i
,RSVAL(in_buf
, 2*i
));
937 for (i
= 0; i
< len
; i
++)
938 SSVAL(out_buf
, 2*i
, SVAL(in_buf
, 2*i
));
941 if (ps
->bigendian_data
) {
942 for (i
= 0; i
< len
; i
++)
943 RSSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
945 for (i
= 0; i
< len
; i
++)
946 SSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
950 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
952 print_asc(5, (unsigned char*)out_buf
, 2*len
);
954 for (i
= 0; i
< len
; i
++)
955 DEBUG(5,("%04x ", out_buf
[i
]));
960 /******************************************************************
961 Stream a unistr. Always little endian.
962 ********************************************************************/
964 bool prs_uint16uni(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
966 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
970 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, (char *)data16s
, len
);
971 ps
->data_offset
+= (len
* sizeof(uint16
));
976 /******************************************************************
977 Stream an array of uint32s. Length is number of uint32s.
978 ********************************************************************/
980 bool prs_uint32s(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint32
*data32s
, int len
)
983 char *q
= prs_mem_get(ps
, len
* sizeof(uint32
));
987 if (UNMARSHALLING(ps
)) {
988 if (ps
->bigendian_data
) {
989 for (i
= 0; i
< len
; i
++)
990 data32s
[i
] = RIVAL(q
, 4*i
);
992 for (i
= 0; i
< len
; i
++)
993 data32s
[i
] = IVAL(q
, 4*i
);
996 if (ps
->bigendian_data
) {
997 for (i
= 0; i
< len
; i
++)
998 RSIVAL(q
, 4*i
, data32s
[i
]);
1000 for (i
= 0; i
< len
; i
++)
1001 SIVAL(q
, 4*i
, data32s
[i
]);
1005 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1007 print_asc(5, (unsigned char*)data32s
, 4*len
);
1009 for (i
= 0; i
< len
; i
++)
1010 DEBUG(5,("%08x ", data32s
[i
]));
1014 ps
->data_offset
+= (len
* sizeof(uint32
));
1019 /******************************************************************
1020 Stream an array of unicode string, length/buffer specified separately,
1021 in uint16 chars. The unicode string is already in little-endian format.
1022 ********************************************************************/
1024 bool prs_buffer5(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, BUFFER5
*str
)
1027 char *q
= prs_mem_get(ps
, str
->buf_len
* sizeof(uint16
));
1031 /* If the string is empty, we don't have anything to stream */
1032 if (str
->buf_len
==0)
1035 if (UNMARSHALLING(ps
)) {
1036 str
->buffer
= PRS_ALLOC_MEM(ps
,uint16
,str
->buf_len
);
1037 if (str
->buffer
== NULL
)
1041 p
= (char *)str
->buffer
;
1043 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->buf_len
);
1045 ps
->data_offset
+= (str
->buf_len
* sizeof(uint16
));
1050 /******************************************************************
1051 Stream a "not" unicode string, length/buffer specified separately,
1052 in byte chars. String is in little-endian format.
1053 ********************************************************************/
1055 bool prs_regval_buffer(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, REGVAL_BUFFER
*buf
)
1058 char *q
= prs_mem_get(ps
, buf
->buf_len
);
1062 if (UNMARSHALLING(ps
)) {
1063 if (buf
->buf_len
> buf
->buf_max_len
) {
1066 if ( buf
->buf_max_len
) {
1067 buf
->buffer
= PRS_ALLOC_MEM(ps
, uint16
, buf
->buf_max_len
);
1068 if ( buf
->buffer
== NULL
)
1075 p
= (char *)buf
->buffer
;
1077 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, buf
->buf_len
/2);
1078 ps
->data_offset
+= buf
->buf_len
;
1083 /******************************************************************
1084 Stream a string, length/buffer specified separately,
1086 ********************************************************************/
1088 bool prs_string2(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, STRING2
*str
)
1091 char *q
= prs_mem_get(ps
, str
->str_str_len
);
1095 if (UNMARSHALLING(ps
)) {
1096 if (str
->str_str_len
> str
->str_max_len
) {
1099 if (str
->str_max_len
) {
1100 str
->buffer
= PRS_ALLOC_MEM(ps
,unsigned char, str
->str_max_len
);
1101 if (str
->buffer
== NULL
)
1105 /* Return early to ensure Coverity isn't confused. */
1106 DEBUG(5,("%s%04x %s: \n", tab_depth(5,depth
), ps
->data_offset
, name
));
1111 if (UNMARSHALLING(ps
)) {
1112 for (i
= 0; i
< str
->str_str_len
; i
++)
1113 str
->buffer
[i
] = CVAL(q
,i
);
1115 for (i
= 0; i
< str
->str_str_len
; i
++)
1116 SCVAL(q
, i
, str
->buffer
[i
]);
1119 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1121 print_asc(5, (unsigned char*)str
->buffer
, str
->str_str_len
);
1123 for (i
= 0; i
< str
->str_str_len
; i
++)
1124 DEBUG(5,("%02x ", str
->buffer
[i
]));
1128 ps
->data_offset
+= str
->str_str_len
;
1133 /******************************************************************
1134 Stream a unicode string, length/buffer specified separately,
1135 in uint16 chars. The unicode string is already in little-endian format.
1136 ********************************************************************/
1138 bool prs_unistr2(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, UNISTR2
*str
)
1141 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
1145 /* If the string is empty, we don't have anything to stream */
1146 if (str
->uni_str_len
==0)
1149 if (UNMARSHALLING(ps
)) {
1150 if (str
->uni_str_len
> str
->uni_max_len
) {
1153 if (str
->uni_max_len
) {
1154 str
->buffer
= PRS_ALLOC_MEM(ps
,uint16
,str
->uni_max_len
);
1155 if (str
->buffer
== NULL
)
1162 p
= (char *)str
->buffer
;
1164 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
1166 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
1171 /******************************************************************
1172 Stream a unicode string, length/buffer specified separately,
1173 in uint16 chars. The unicode string is already in little-endian format.
1174 ********************************************************************/
1176 bool prs_unistr3(bool charmode
, const char *name
, UNISTR3
*str
, prs_struct
*ps
, int depth
)
1179 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
1183 if (UNMARSHALLING(ps
)) {
1184 if (str
->uni_str_len
) {
1185 str
->str
.buffer
= PRS_ALLOC_MEM(ps
,uint16
,str
->uni_str_len
);
1186 if (str
->str
.buffer
== NULL
)
1189 str
->str
.buffer
= NULL
;
1193 p
= (char *)str
->str
.buffer
;
1195 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
1196 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
1201 /*******************************************************************
1202 Stream a unicode null-terminated string. As the string is already
1203 in little-endian format then do it as a stream of bytes.
1204 ********************************************************************/
1206 bool prs_unistr(const char *name
, prs_struct
*ps
, int depth
, UNISTR
*str
)
1208 unsigned int len
= 0;
1209 unsigned char *p
= (unsigned char *)str
->buffer
;
1215 if (MARSHALLING(ps
)) {
1217 for(len
= 0; str
->buffer
[len
] != 0; len
++)
1220 q
= prs_mem_get(ps
, (len
+1)*2);
1226 for(len
= 0; str
->buffer
[len
] != 0; len
++) {
1227 if(ps
->bigendian_data
) {
1228 /* swap bytes - p is little endian, q is big endian. */
1244 * even if the string is 'empty' (only an \0 char)
1245 * at this point the leading \0 hasn't been parsed.
1255 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1256 print_asc(5, (unsigned char*)start
, 2*len
);
1259 else { /* unmarshalling */
1261 uint32 alloc_len
= 0;
1262 q
= ps
->data_p
+ prs_offset(ps
);
1265 * Work out how much space we need and talloc it.
1267 max_len
= (ps
->buffer_size
- ps
->data_offset
)/sizeof(uint16
);
1269 /* the test of the value of *ptr helps to catch the circumstance
1270 where we have an emtpty (non-existent) string in the buffer */
1271 for ( ptr
= (uint16
*)q
; *ptr
++ && (alloc_len
<= max_len
); alloc_len
++)
1275 if (alloc_len
< max_len
)
1278 /* should we allocate anything at all? */
1279 str
->buffer
= PRS_ALLOC_MEM(ps
,uint16
,alloc_len
);
1280 if ((str
->buffer
== NULL
) && (alloc_len
> 0))
1283 p
= (unsigned char *)str
->buffer
;
1286 /* the (len < alloc_len) test is to prevent us from overwriting
1287 memory that is not ours...if we get that far, we have a non-null
1288 terminated string in the buffer and have messed up somewhere */
1289 while ((len
< alloc_len
) && (*(uint16
*)q
!= 0)) {
1290 if(ps
->bigendian_data
)
1292 /* swap bytes - q is big endian, p is little endian. */
1293 p
[0] = (unsigned char)q
[1];
1294 p
[1] = (unsigned char)q
[0];
1299 p
[0] = (unsigned char)q
[0];
1300 p
[1] = (unsigned char)q
[1];
1307 if (len
< alloc_len
) {
1308 /* NULL terminate the UNISTR */
1309 str
->buffer
[len
++] = '\0';
1312 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1313 print_asc(5, (unsigned char*)str
->buffer
, 2*len
);
1317 /* set the offset in the prs_struct; 'len' points to the
1318 terminiating NULL in the UNISTR so we need to go one more
1320 ps
->data_offset
+= (len
)*2;
1326 /*******************************************************************
1327 Stream a null-terminated string. len is strlen, and therefore does
1328 not include the null-termination character.
1329 ********************************************************************/
1331 bool prs_string(const char *name
, prs_struct
*ps
, int depth
, char *str
, int max_buf_size
)
1337 if (UNMARSHALLING(ps
))
1338 len
= strlen(&ps
->data_p
[ps
->data_offset
]);
1342 len
= MIN(len
, (max_buf_size
-1));
1344 q
= prs_mem_get(ps
, len
+1);
1348 for(i
= 0; i
< len
; i
++) {
1349 if (UNMARSHALLING(ps
))
1355 /* The terminating null. */
1358 if (MARSHALLING(ps
)) {
1362 ps
->data_offset
+= len
+1;
1364 dump_data(5+depth
, (uint8
*)q
, len
);
1369 bool prs_string_alloc(const char *name
, prs_struct
*ps
, int depth
, const char **str
)
1374 if (UNMARSHALLING(ps
)) {
1375 len
= strlen(&ps
->data_p
[ps
->data_offset
]);
1380 tmp_str
= PRS_ALLOC_MEM(ps
, char, len
+1);
1382 if (tmp_str
== NULL
) {
1386 if (MARSHALLING(ps
)) {
1387 strncpy(tmp_str
, *str
, len
);
1390 if (!prs_string(name
, ps
, depth
, tmp_str
, len
+1)) {
1398 /*******************************************************************
1399 prs_uint16 wrapper. Call this and it sets up a pointer to where the
1400 uint16 should be stored, or gets the size if reading.
1401 ********************************************************************/
1403 bool prs_uint16_pre(const char *name
, prs_struct
*ps
, int depth
, uint16
*data16
, uint32
*offset
)
1405 *offset
= ps
->data_offset
;
1406 if (UNMARSHALLING(ps
)) {
1408 return prs_uint16(name
, ps
, depth
, data16
);
1410 char *q
= prs_mem_get(ps
, sizeof(uint16
));
1413 ps
->data_offset
+= sizeof(uint16
);
1418 /*******************************************************************
1419 prs_uint16 wrapper. call this and it retrospectively stores the size.
1420 does nothing on reading, as that is already handled by ...._pre()
1421 ********************************************************************/
1423 bool prs_uint16_post(const char *name
, prs_struct
*ps
, int depth
, uint16
*data16
,
1424 uint32 ptr_uint16
, uint32 start_offset
)
1426 if (MARSHALLING(ps
)) {
1428 * Writing - temporarily move the offset pointer.
1430 uint16 data_size
= ps
->data_offset
- start_offset
;
1431 uint32 old_offset
= ps
->data_offset
;
1433 ps
->data_offset
= ptr_uint16
;
1434 if(!prs_uint16(name
, ps
, depth
, &data_size
)) {
1435 ps
->data_offset
= old_offset
;
1438 ps
->data_offset
= old_offset
;
1440 ps
->data_offset
= start_offset
+ (uint32
)(*data16
);
1445 /*******************************************************************
1446 prs_uint32 wrapper. Call this and it sets up a pointer to where the
1447 uint32 should be stored, or gets the size if reading.
1448 ********************************************************************/
1450 bool prs_uint32_pre(const char *name
, prs_struct
*ps
, int depth
, uint32
*data32
, uint32
*offset
)
1452 *offset
= ps
->data_offset
;
1453 if (UNMARSHALLING(ps
) && (data32
!= NULL
)) {
1455 return prs_uint32(name
, ps
, depth
, data32
);
1457 ps
->data_offset
+= sizeof(uint32
);
1462 /*******************************************************************
1463 prs_uint32 wrapper. call this and it retrospectively stores the size.
1464 does nothing on reading, as that is already handled by ...._pre()
1465 ********************************************************************/
1467 bool prs_uint32_post(const char *name
, prs_struct
*ps
, int depth
, uint32
*data32
,
1468 uint32 ptr_uint32
, uint32 data_size
)
1470 if (MARSHALLING(ps
)) {
1472 * Writing - temporarily move the offset pointer.
1474 uint32 old_offset
= ps
->data_offset
;
1475 ps
->data_offset
= ptr_uint32
;
1476 if(!prs_uint32(name
, ps
, depth
, &data_size
)) {
1477 ps
->data_offset
= old_offset
;
1480 ps
->data_offset
= old_offset
;
1485 /* useful function to store a structure in rpc wire format */
1486 int tdb_prs_store(TDB_CONTEXT
*tdb
, TDB_DATA kbuf
, prs_struct
*ps
)
1489 dbuf
.dptr
= (uint8
*)ps
->data_p
;
1490 dbuf
.dsize
= prs_offset(ps
);
1491 return tdb_trans_store(tdb
, kbuf
, dbuf
, TDB_REPLACE
);
1494 /* useful function to fetch a structure into rpc wire format */
1495 int tdb_prs_fetch(TDB_CONTEXT
*tdb
, TDB_DATA kbuf
, prs_struct
*ps
, TALLOC_CTX
*mem_ctx
)
1499 prs_init_empty(ps
, mem_ctx
, UNMARSHALL
);
1501 dbuf
= tdb_fetch(tdb
, kbuf
);
1505 prs_give_memory(ps
, (char *)dbuf
.dptr
, dbuf
.dsize
, True
);
1510 /*******************************************************************
1512 ********************************************************************/
1514 bool prs_hash1(prs_struct
*ps
, uint32 offset
, int len
)
1521 #ifdef DEBUG_PASSWORD
1522 DEBUG(100, ("prs_hash1\n"));
1523 dump_data(100, (uint8
*)ps
->sess_key
, 16);
1524 dump_data(100, (uint8
*)q
, len
);
1526 SamOEMhash((uchar
*) q
, (const unsigned char *)ps
->sess_key
, len
);
1528 #ifdef DEBUG_PASSWORD
1529 dump_data(100, (uint8
*)q
, len
);
1535 /*******************************************************************
1536 Create a digest over the entire packet (including the data), and
1537 MD5 it with the session key.
1538 ********************************************************************/
1540 static void schannel_digest(struct schannel_auth_struct
*a
,
1541 enum pipe_auth_level auth_level
,
1542 RPC_AUTH_SCHANNEL_CHK
* verf
,
1543 char *data
, size_t data_len
,
1544 uchar digest_final
[16])
1546 uchar whole_packet_digest
[16];
1548 struct MD5Context ctx3
;
1552 /* verfiy the signature on the packet by MD5 over various bits */
1554 /* use our sequence number, which ensures the packet is not
1556 MD5Update(&ctx3
, zeros
, sizeof(zeros
));
1557 MD5Update(&ctx3
, verf
->sig
, sizeof(verf
->sig
));
1558 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1559 MD5Update(&ctx3
, verf
->confounder
, sizeof(verf
->confounder
));
1561 MD5Update(&ctx3
, (const unsigned char *)data
, data_len
);
1562 MD5Final(whole_packet_digest
, &ctx3
);
1563 dump_data_pw("whole_packet_digest:\n", whole_packet_digest
, sizeof(whole_packet_digest
));
1565 /* MD5 this result and the session key, to prove that
1566 only a valid client could had produced this */
1567 hmac_md5(a
->sess_key
, whole_packet_digest
, sizeof(whole_packet_digest
), digest_final
);
1570 /*******************************************************************
1571 Calculate the key with which to encode the data payload
1572 ********************************************************************/
1574 static void schannel_get_sealing_key(struct schannel_auth_struct
*a
,
1575 RPC_AUTH_SCHANNEL_CHK
*verf
,
1576 uchar sealing_key
[16])
1585 for (i
= 0; i
< sizeof(sess_kf0
); i
++) {
1586 sess_kf0
[i
] = a
->sess_key
[i
] ^ 0xf0;
1589 dump_data_pw("sess_kf0:\n", sess_kf0
, sizeof(sess_kf0
));
1591 /* MD5 of sess_kf0 and 4 zero bytes */
1592 hmac_md5(sess_kf0
, zeros
, 0x4, digest2
);
1593 dump_data_pw("digest2:\n", digest2
, sizeof(digest2
));
1595 /* MD5 of the above result, plus 8 bytes of sequence number */
1596 hmac_md5(digest2
, verf
->seq_num
, sizeof(verf
->seq_num
), sealing_key
);
1597 dump_data_pw("sealing_key:\n", sealing_key
, 16);
1600 /*******************************************************************
1601 Encode or Decode the sequence number (which is symmetric)
1602 ********************************************************************/
1604 static void schannel_deal_with_seq_num(struct schannel_auth_struct
*a
,
1605 RPC_AUTH_SCHANNEL_CHK
*verf
)
1608 uchar sequence_key
[16];
1613 hmac_md5(a
->sess_key
, zeros
, sizeof(zeros
), digest1
);
1614 dump_data_pw("(sequence key) digest1:\n", digest1
, sizeof(digest1
));
1616 hmac_md5(digest1
, verf
->packet_digest
, 8, sequence_key
);
1618 dump_data_pw("sequence_key:\n", sequence_key
, sizeof(sequence_key
));
1620 dump_data_pw("seq_num (before):\n", verf
->seq_num
, sizeof(verf
->seq_num
));
1621 SamOEMhash(verf
->seq_num
, sequence_key
, 8);
1622 dump_data_pw("seq_num (after):\n", verf
->seq_num
, sizeof(verf
->seq_num
));
1625 /*******************************************************************
1626 creates an RPC_AUTH_SCHANNEL_CHK structure.
1627 ********************************************************************/
1629 static bool init_rpc_auth_schannel_chk(RPC_AUTH_SCHANNEL_CHK
* chk
,
1631 const uchar packet_digest
[8],
1632 const uchar seq_num
[8], const uchar confounder
[8])
1637 memcpy(chk
->sig
, sig
, sizeof(chk
->sig
));
1638 memcpy(chk
->packet_digest
, packet_digest
, sizeof(chk
->packet_digest
));
1639 memcpy(chk
->seq_num
, seq_num
, sizeof(chk
->seq_num
));
1640 memcpy(chk
->confounder
, confounder
, sizeof(chk
->confounder
));
1645 /*******************************************************************
1646 Encode a blob of data using the schannel alogrithm, also produceing
1647 a checksum over the original data. We currently only support
1648 signing and sealing togeather - the signing-only code is close, but not
1649 quite compatible with what MS does.
1650 ********************************************************************/
1652 void schannel_encode(struct schannel_auth_struct
*a
, enum pipe_auth_level auth_level
,
1653 enum schannel_direction direction
,
1654 RPC_AUTH_SCHANNEL_CHK
* verf
,
1655 char *data
, size_t data_len
)
1657 uchar digest_final
[16];
1658 uchar confounder
[8];
1660 static const uchar nullbytes
[8] = { 0, };
1662 static const uchar schannel_seal_sig
[8] = SCHANNEL_SEAL_SIGNATURE
;
1663 static const uchar schannel_sign_sig
[8] = SCHANNEL_SIGN_SIGNATURE
;
1664 const uchar
*schannel_sig
= NULL
;
1666 DEBUG(10,("SCHANNEL: schannel_encode seq_num=%d data_len=%lu\n", a
->seq_num
, (unsigned long)data_len
));
1668 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1669 schannel_sig
= schannel_seal_sig
;
1671 schannel_sig
= schannel_sign_sig
;
1674 /* fill the 'confounder' with random data */
1675 generate_random_buffer(confounder
, sizeof(confounder
));
1677 dump_data_pw("a->sess_key:\n", a
->sess_key
, sizeof(a
->sess_key
));
1679 RSIVAL(seq_num
, 0, a
->seq_num
);
1681 switch (direction
) {
1682 case SENDER_IS_INITIATOR
:
1683 SIVAL(seq_num
, 4, 0x80);
1685 case SENDER_IS_ACCEPTOR
:
1686 SIVAL(seq_num
, 4, 0x0);
1690 dump_data_pw("verf->seq_num:\n", seq_num
, sizeof(verf
->seq_num
));
1692 init_rpc_auth_schannel_chk(verf
, schannel_sig
, nullbytes
,
1693 seq_num
, confounder
);
1695 /* produce a digest of the packet to prove it's legit (before we seal it) */
1696 schannel_digest(a
, auth_level
, verf
, data
, data_len
, digest_final
);
1697 memcpy(verf
->packet_digest
, digest_final
, sizeof(verf
->packet_digest
));
1699 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1700 uchar sealing_key
[16];
1702 /* get the key to encode the data with */
1703 schannel_get_sealing_key(a
, verf
, sealing_key
);
1705 /* encode the verification data */
1706 dump_data_pw("verf->confounder:\n", verf
->confounder
, sizeof(verf
->confounder
));
1707 SamOEMhash(verf
->confounder
, sealing_key
, 8);
1709 dump_data_pw("verf->confounder_enc:\n", verf
->confounder
, sizeof(verf
->confounder
));
1711 /* encode the packet payload */
1712 dump_data_pw("data:\n", (const unsigned char *)data
, data_len
);
1713 SamOEMhash((unsigned char *)data
, sealing_key
, data_len
);
1714 dump_data_pw("data_enc:\n", (const unsigned char *)data
, data_len
);
1717 /* encode the sequence number (key based on packet digest) */
1718 /* needs to be done after the sealing, as the original version
1719 is used in the sealing stuff... */
1720 schannel_deal_with_seq_num(a
, verf
);
1725 /*******************************************************************
1726 Decode a blob of data using the schannel alogrithm, also verifiying
1727 a checksum over the original data. We currently can verify signed messages,
1728 as well as decode sealed messages
1729 ********************************************************************/
1731 bool schannel_decode(struct schannel_auth_struct
*a
, enum pipe_auth_level auth_level
,
1732 enum schannel_direction direction
,
1733 RPC_AUTH_SCHANNEL_CHK
* verf
, char *data
, size_t data_len
)
1735 uchar digest_final
[16];
1737 static const uchar schannel_seal_sig
[8] = SCHANNEL_SEAL_SIGNATURE
;
1738 static const uchar schannel_sign_sig
[8] = SCHANNEL_SIGN_SIGNATURE
;
1739 const uchar
*schannel_sig
= NULL
;
1743 DEBUG(10,("SCHANNEL: schannel_decode seq_num=%d data_len=%lu\n", a
->seq_num
, (unsigned long)data_len
));
1745 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1746 schannel_sig
= schannel_seal_sig
;
1748 schannel_sig
= schannel_sign_sig
;
1751 /* Create the expected sequence number for comparison */
1752 RSIVAL(seq_num
, 0, a
->seq_num
);
1754 switch (direction
) {
1755 case SENDER_IS_INITIATOR
:
1756 SIVAL(seq_num
, 4, 0x80);
1758 case SENDER_IS_ACCEPTOR
:
1759 SIVAL(seq_num
, 4, 0x0);
1763 DEBUG(10,("SCHANNEL: schannel_decode seq_num=%d data_len=%lu\n", a
->seq_num
, (unsigned long)data_len
));
1764 dump_data_pw("a->sess_key:\n", a
->sess_key
, sizeof(a
->sess_key
));
1766 dump_data_pw("seq_num:\n", seq_num
, sizeof(seq_num
));
1768 /* extract the sequence number (key based on supplied packet digest) */
1769 /* needs to be done before the sealing, as the original version
1770 is used in the sealing stuff... */
1771 schannel_deal_with_seq_num(a
, verf
);
1773 if (memcmp(verf
->seq_num
, seq_num
, sizeof(seq_num
))) {
1774 /* don't even bother with the below if the sequence number is out */
1775 /* The sequence number is MD5'ed with a key based on the whole-packet
1776 digest, as supplied by the client. We check that it's a valid
1777 checksum after the decode, below
1779 DEBUG(2, ("schannel_decode: FAILED: packet sequence number:\n"));
1780 dump_data(2, verf
->seq_num
, sizeof(verf
->seq_num
));
1781 DEBUG(2, ("should be:\n"));
1782 dump_data(2, seq_num
, sizeof(seq_num
));
1787 if (memcmp(verf
->sig
, schannel_sig
, sizeof(verf
->sig
))) {
1788 /* Validate that the other end sent the expected header */
1789 DEBUG(2, ("schannel_decode: FAILED: packet header:\n"));
1790 dump_data(2, verf
->sig
, sizeof(verf
->sig
));
1791 DEBUG(2, ("should be:\n"));
1792 dump_data(2, schannel_sig
, sizeof(schannel_sig
));
1796 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1797 uchar sealing_key
[16];
1799 /* get the key to extract the data with */
1800 schannel_get_sealing_key(a
, verf
, sealing_key
);
1802 /* extract the verification data */
1803 dump_data_pw("verf->confounder:\n", verf
->confounder
,
1804 sizeof(verf
->confounder
));
1805 SamOEMhash(verf
->confounder
, sealing_key
, 8);
1807 dump_data_pw("verf->confounder_dec:\n", verf
->confounder
,
1808 sizeof(verf
->confounder
));
1810 /* extract the packet payload */
1811 dump_data_pw("data :\n", (const unsigned char *)data
, data_len
);
1812 SamOEMhash((unsigned char *)data
, sealing_key
, data_len
);
1813 dump_data_pw("datadec:\n", (const unsigned char *)data
, data_len
);
1816 /* digest includes 'data' after unsealing */
1817 schannel_digest(a
, auth_level
, verf
, data
, data_len
, digest_final
);
1819 dump_data_pw("Calculated digest:\n", digest_final
,
1820 sizeof(digest_final
));
1821 dump_data_pw("verf->packet_digest:\n", verf
->packet_digest
,
1822 sizeof(verf
->packet_digest
));
1824 /* compare - if the client got the same result as us, then
1825 it must know the session key */
1826 return (memcmp(digest_final
, verf
->packet_digest
,
1827 sizeof(verf
->packet_digest
)) == 0);
1830 /*******************************************************************
1831 creates a new prs_struct containing a DATA_BLOB
1832 ********************************************************************/
1833 bool prs_init_data_blob(prs_struct
*prs
, DATA_BLOB
*blob
, TALLOC_CTX
*mem_ctx
)
1835 if (!prs_init( prs
, RPC_MAX_PDU_FRAG_LEN
, mem_ctx
, MARSHALL
))
1839 if (!prs_copy_data_in(prs
, (char *)blob
->data
, blob
->length
))
1845 /*******************************************************************
1846 return the contents of a prs_struct in a DATA_BLOB
1847 ********************************************************************/
1848 bool prs_data_blob(prs_struct
*prs
, DATA_BLOB
*blob
, TALLOC_CTX
*mem_ctx
)
1850 blob
->length
= prs_data_size(prs
);
1851 blob
->data
= (uint8
*)TALLOC_ZERO_SIZE(mem_ctx
, blob
->length
);
1853 /* set the pointer at the end of the buffer */
1854 prs_set_offset( prs
, prs_data_size(prs
) );
1856 if (!prs_copy_all_data_out((char *)blob
->data
, prs
))