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_data(prs_struct
*dst
, void *src_base
, uint32_t start
,
405 if(!prs_grow(dst
, len
)) {
409 memcpy(&dst
->data_p
[dst
->data_offset
], ((char *)src_base
) + start
, (size_t)len
);
410 dst
->data_offset
+= len
;
414 bool prs_append_some_prs_data(prs_struct
*dst
, prs_struct
*src
, int32 start
,
417 return prs_append_some_data(dst
, src
->data_p
, start
, len
);
420 /*******************************************************************
421 Append the data from a buffer into a parse_struct.
422 ********************************************************************/
424 bool prs_copy_data_in(prs_struct
*dst
, const char *src
, uint32 len
)
429 if(!prs_grow(dst
, len
))
432 memcpy(&dst
->data_p
[dst
->data_offset
], src
, (size_t)len
);
433 dst
->data_offset
+= len
;
438 /*******************************************************************
439 Copy some data from a parse_struct into a buffer.
440 ********************************************************************/
442 bool prs_copy_data_out(char *dst
, prs_struct
*src
, uint32 len
)
447 if(!prs_mem_get(src
, len
))
450 memcpy(dst
, &src
->data_p
[src
->data_offset
], (size_t)len
);
451 src
->data_offset
+= len
;
456 /*******************************************************************
457 Copy all the data from a parse_struct into a buffer.
458 ********************************************************************/
460 bool prs_copy_all_data_out(char *dst
, prs_struct
*src
)
462 uint32 len
= prs_offset(src
);
467 prs_set_offset(src
, 0);
468 return prs_copy_data_out(dst
, src
, len
);
471 /*******************************************************************
472 Set the data as X-endian (external interface).
473 ********************************************************************/
475 void prs_set_endian_data(prs_struct
*ps
, bool endian
)
477 ps
->bigendian_data
= endian
;
480 /*******************************************************************
481 Align a the data_len to a multiple of align bytes - filling with
483 ********************************************************************/
485 bool prs_align(prs_struct
*ps
)
487 uint32 mod
= ps
->data_offset
& (ps
->align
-1);
489 if (ps
->align
!= 0 && mod
!= 0) {
490 uint32 extra_space
= (ps
->align
- mod
);
491 if(!prs_grow(ps
, extra_space
))
493 memset(&ps
->data_p
[ps
->data_offset
], '\0', (size_t)extra_space
);
494 ps
->data_offset
+= extra_space
;
500 /******************************************************************
501 Align on a 2 byte boundary
502 *****************************************************************/
504 bool prs_align_uint16(prs_struct
*ps
)
507 uint8 old_align
= ps
->align
;
511 ps
->align
= old_align
;
516 /******************************************************************
517 Align on a 8 byte boundary
518 *****************************************************************/
520 bool prs_align_uint64(prs_struct
*ps
)
523 uint8 old_align
= ps
->align
;
527 ps
->align
= old_align
;
532 /******************************************************************
533 Align on a specific byte boundary
534 *****************************************************************/
536 bool prs_align_custom(prs_struct
*ps
, uint8 boundary
)
539 uint8 old_align
= ps
->align
;
541 ps
->align
= boundary
;
543 ps
->align
= old_align
;
550 /*******************************************************************
551 Align only if required (for the unistr2 string mainly)
552 ********************************************************************/
554 bool prs_align_needed(prs_struct
*ps
, uint32 needed
)
559 return prs_align(ps
);
562 /*******************************************************************
563 Ensure we can read/write to a given offset.
564 ********************************************************************/
566 char *prs_mem_get(prs_struct
*ps
, uint32 extra_size
)
568 if(UNMARSHALLING(ps
)) {
570 * If reading, ensure that we can read the requested size item.
572 if (ps
->data_offset
+ extra_size
> ps
->buffer_size
) {
573 DEBUG(0,("prs_mem_get: reading data of size %u would overrun "
574 "buffer by %u bytes.\n",
575 (unsigned int)extra_size
,
576 (unsigned int)(ps
->data_offset
+ extra_size
- ps
->buffer_size
) ));
581 * Writing - grow the buffer if needed.
583 if(!prs_grow(ps
, extra_size
))
586 return &ps
->data_p
[ps
->data_offset
];
589 /*******************************************************************
590 Change the struct type.
591 ********************************************************************/
593 void prs_switch_type(prs_struct
*ps
, bool io
)
595 if ((ps
->io
^ io
) == True
)
599 /*******************************************************************
600 Force a prs_struct to be dynamic even when it's size is 0.
601 ********************************************************************/
603 void prs_force_dynamic(prs_struct
*ps
)
608 /*******************************************************************
609 Associate a session key with a parse struct.
610 ********************************************************************/
612 void prs_set_session_key(prs_struct
*ps
, const char sess_key
[16])
614 ps
->sess_key
= sess_key
;
617 /*******************************************************************
619 ********************************************************************/
621 bool prs_uint8(const char *name
, prs_struct
*ps
, int depth
, uint8
*data8
)
623 char *q
= prs_mem_get(ps
, 1);
627 if (UNMARSHALLING(ps
))
632 DEBUG(5,("%s%04x %s: %02x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data8
));
634 ps
->data_offset
+= 1;
639 /*******************************************************************
640 Stream a uint16* (allocate memory if unmarshalling)
641 ********************************************************************/
643 bool prs_pointer( const char *name
, prs_struct
*ps
, int depth
,
644 void *dta
, size_t data_size
,
645 bool (*prs_fn
)(const char*, prs_struct
*, int, void*) )
647 void ** data
= (void **)dta
;
650 /* output f000baaa to stream if the pointer is non-zero. */
652 data_p
= *data
? 0xf000baaa : 0;
654 if ( !prs_uint32("ptr", ps
, depth
, &data_p
))
657 /* we're done if there is no data */
662 if (UNMARSHALLING(ps
)) {
664 if ( !(*data
= PRS_ALLOC_MEM(ps
, char, data_size
)) )
671 return prs_fn(name
, ps
, depth
, *data
);
675 /*******************************************************************
677 ********************************************************************/
679 bool prs_uint16(const char *name
, prs_struct
*ps
, int depth
, uint16
*data16
)
681 char *q
= prs_mem_get(ps
, sizeof(uint16
));
685 if (UNMARSHALLING(ps
)) {
686 if (ps
->bigendian_data
)
687 *data16
= RSVAL(q
,0);
691 if (ps
->bigendian_data
)
697 DEBUG(5,("%s%04x %s: %04x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data16
));
699 ps
->data_offset
+= sizeof(uint16
);
704 /*******************************************************************
706 ********************************************************************/
708 bool prs_uint32(const char *name
, prs_struct
*ps
, int depth
, uint32
*data32
)
710 char *q
= prs_mem_get(ps
, sizeof(uint32
));
714 if (UNMARSHALLING(ps
)) {
715 if (ps
->bigendian_data
)
716 *data32
= RIVAL(q
,0);
720 if (ps
->bigendian_data
)
726 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data32
));
728 ps
->data_offset
+= sizeof(uint32
);
733 /*******************************************************************
735 ********************************************************************/
737 bool prs_int32(const char *name
, prs_struct
*ps
, int depth
, int32
*data32
)
739 char *q
= prs_mem_get(ps
, sizeof(int32
));
743 if (UNMARSHALLING(ps
)) {
744 if (ps
->bigendian_data
)
745 *data32
= RIVALS(q
,0);
747 *data32
= IVALS(q
,0);
749 if (ps
->bigendian_data
)
750 RSIVALS(q
,0,*data32
);
755 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(5,depth
), ps
->data_offset
, name
, *data32
));
757 ps
->data_offset
+= sizeof(int32
);
762 /*******************************************************************
764 ********************************************************************/
766 bool prs_ntstatus(const char *name
, prs_struct
*ps
, int depth
, NTSTATUS
*status
)
768 char *q
= prs_mem_get(ps
, sizeof(uint32
));
772 if (UNMARSHALLING(ps
)) {
773 if (ps
->bigendian_data
)
774 *status
= NT_STATUS(RIVAL(q
,0));
776 *status
= NT_STATUS(IVAL(q
,0));
778 if (ps
->bigendian_data
)
779 RSIVAL(q
,0,NT_STATUS_V(*status
));
781 SIVAL(q
,0,NT_STATUS_V(*status
));
784 DEBUG(5,("%s%04x %s: %s\n", tab_depth(5,depth
), ps
->data_offset
, name
,
785 nt_errstr(*status
)));
787 ps
->data_offset
+= sizeof(uint32
);
792 /*******************************************************************
793 Stream a DCE error code
794 ********************************************************************/
796 bool prs_dcerpc_status(const char *name
, prs_struct
*ps
, int depth
, NTSTATUS
*status
)
798 char *q
= prs_mem_get(ps
, sizeof(uint32
));
802 if (UNMARSHALLING(ps
)) {
803 if (ps
->bigendian_data
)
804 *status
= NT_STATUS(RIVAL(q
,0));
806 *status
= NT_STATUS(IVAL(q
,0));
808 if (ps
->bigendian_data
)
809 RSIVAL(q
,0,NT_STATUS_V(*status
));
811 SIVAL(q
,0,NT_STATUS_V(*status
));
814 DEBUG(5,("%s%04x %s: %s\n", tab_depth(5,depth
), ps
->data_offset
, name
,
815 dcerpc_errstr(NT_STATUS_V(*status
))));
817 ps
->data_offset
+= sizeof(uint32
);
823 /*******************************************************************
825 ********************************************************************/
827 bool prs_werror(const char *name
, prs_struct
*ps
, int depth
, WERROR
*status
)
829 char *q
= prs_mem_get(ps
, sizeof(uint32
));
833 if (UNMARSHALLING(ps
)) {
834 if (ps
->bigendian_data
)
835 *status
= W_ERROR(RIVAL(q
,0));
837 *status
= W_ERROR(IVAL(q
,0));
839 if (ps
->bigendian_data
)
840 RSIVAL(q
,0,W_ERROR_V(*status
));
842 SIVAL(q
,0,W_ERROR_V(*status
));
845 DEBUG(5,("%s%04x %s: %s\n", tab_depth(5,depth
), ps
->data_offset
, name
,
846 dos_errstr(*status
)));
848 ps
->data_offset
+= sizeof(uint32
);
854 /******************************************************************
855 Stream an array of uint8s. Length is number of uint8s.
856 ********************************************************************/
858 bool prs_uint8s(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint8
*data8s
, int len
)
861 char *q
= prs_mem_get(ps
, len
);
865 if (UNMARSHALLING(ps
)) {
866 for (i
= 0; i
< len
; i
++)
867 data8s
[i
] = CVAL(q
,i
);
869 for (i
= 0; i
< len
; i
++)
870 SCVAL(q
, i
, data8s
[i
]);
873 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
,name
));
875 print_asc(5, (unsigned char*)data8s
, len
);
877 for (i
= 0; i
< len
; i
++)
878 DEBUG(5,("%02x ", data8s
[i
]));
882 ps
->data_offset
+= len
;
887 /******************************************************************
888 Stream an array of uint16s. Length is number of uint16s.
889 ********************************************************************/
891 bool prs_uint16s(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
894 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
898 if (UNMARSHALLING(ps
)) {
899 if (ps
->bigendian_data
) {
900 for (i
= 0; i
< len
; i
++)
901 data16s
[i
] = RSVAL(q
, 2*i
);
903 for (i
= 0; i
< len
; i
++)
904 data16s
[i
] = SVAL(q
, 2*i
);
907 if (ps
->bigendian_data
) {
908 for (i
= 0; i
< len
; i
++)
909 RSSVAL(q
, 2*i
, data16s
[i
]);
911 for (i
= 0; i
< len
; i
++)
912 SSVAL(q
, 2*i
, data16s
[i
]);
916 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
918 print_asc(5, (unsigned char*)data16s
, 2*len
);
920 for (i
= 0; i
< len
; i
++)
921 DEBUG(5,("%04x ", data16s
[i
]));
925 ps
->data_offset
+= (len
* sizeof(uint16
));
930 /******************************************************************
931 Start using a function for streaming unicode chars. If unmarshalling,
932 output must be little-endian, if marshalling, input must be little-endian.
933 ********************************************************************/
935 static void dbg_rw_punival(bool charmode
, const char *name
, int depth
, prs_struct
*ps
,
936 char *in_buf
, char *out_buf
, int len
)
940 if (UNMARSHALLING(ps
)) {
941 if (ps
->bigendian_data
) {
942 for (i
= 0; i
< len
; i
++)
943 SSVAL(out_buf
,2*i
,RSVAL(in_buf
, 2*i
));
945 for (i
= 0; i
< len
; i
++)
946 SSVAL(out_buf
, 2*i
, SVAL(in_buf
, 2*i
));
949 if (ps
->bigendian_data
) {
950 for (i
= 0; i
< len
; i
++)
951 RSSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
953 for (i
= 0; i
< len
; i
++)
954 SSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
958 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
960 print_asc(5, (unsigned char*)out_buf
, 2*len
);
962 for (i
= 0; i
< len
; i
++)
963 DEBUG(5,("%04x ", out_buf
[i
]));
968 /******************************************************************
969 Stream a unistr. Always little endian.
970 ********************************************************************/
972 bool prs_uint16uni(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
974 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
978 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, (char *)data16s
, len
);
979 ps
->data_offset
+= (len
* sizeof(uint16
));
984 /******************************************************************
985 Stream an array of uint32s. Length is number of uint32s.
986 ********************************************************************/
988 bool prs_uint32s(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, uint32
*data32s
, int len
)
991 char *q
= prs_mem_get(ps
, len
* sizeof(uint32
));
995 if (UNMARSHALLING(ps
)) {
996 if (ps
->bigendian_data
) {
997 for (i
= 0; i
< len
; i
++)
998 data32s
[i
] = RIVAL(q
, 4*i
);
1000 for (i
= 0; i
< len
; i
++)
1001 data32s
[i
] = IVAL(q
, 4*i
);
1004 if (ps
->bigendian_data
) {
1005 for (i
= 0; i
< len
; i
++)
1006 RSIVAL(q
, 4*i
, data32s
[i
]);
1008 for (i
= 0; i
< len
; i
++)
1009 SIVAL(q
, 4*i
, data32s
[i
]);
1013 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1015 print_asc(5, (unsigned char*)data32s
, 4*len
);
1017 for (i
= 0; i
< len
; i
++)
1018 DEBUG(5,("%08x ", data32s
[i
]));
1022 ps
->data_offset
+= (len
* sizeof(uint32
));
1027 /******************************************************************
1028 Stream an array of unicode string, length/buffer specified separately,
1029 in uint16 chars. The unicode string is already in little-endian format.
1030 ********************************************************************/
1032 bool prs_buffer5(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, BUFFER5
*str
)
1035 char *q
= prs_mem_get(ps
, str
->buf_len
* sizeof(uint16
));
1039 /* If the string is empty, we don't have anything to stream */
1040 if (str
->buf_len
==0)
1043 if (UNMARSHALLING(ps
)) {
1044 str
->buffer
= PRS_ALLOC_MEM(ps
,uint16
,str
->buf_len
);
1045 if (str
->buffer
== NULL
)
1049 p
= (char *)str
->buffer
;
1051 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->buf_len
);
1053 ps
->data_offset
+= (str
->buf_len
* sizeof(uint16
));
1058 /******************************************************************
1059 Stream a "not" unicode string, length/buffer specified separately,
1060 in byte chars. String is in little-endian format.
1061 ********************************************************************/
1063 bool prs_regval_buffer(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, REGVAL_BUFFER
*buf
)
1066 char *q
= prs_mem_get(ps
, buf
->buf_len
);
1070 if (UNMARSHALLING(ps
)) {
1071 if (buf
->buf_len
> buf
->buf_max_len
) {
1074 if ( buf
->buf_max_len
) {
1075 buf
->buffer
= PRS_ALLOC_MEM(ps
, uint16
, buf
->buf_max_len
);
1076 if ( buf
->buffer
== NULL
)
1083 p
= (char *)buf
->buffer
;
1085 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, buf
->buf_len
/2);
1086 ps
->data_offset
+= buf
->buf_len
;
1091 /******************************************************************
1092 Stream a string, length/buffer specified separately,
1094 ********************************************************************/
1096 bool prs_string2(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, STRING2
*str
)
1099 char *q
= prs_mem_get(ps
, str
->str_str_len
);
1103 if (UNMARSHALLING(ps
)) {
1104 if (str
->str_str_len
> str
->str_max_len
) {
1107 if (str
->str_max_len
) {
1108 str
->buffer
= PRS_ALLOC_MEM(ps
,unsigned char, str
->str_max_len
);
1109 if (str
->buffer
== NULL
)
1113 /* Return early to ensure Coverity isn't confused. */
1114 DEBUG(5,("%s%04x %s: \n", tab_depth(5,depth
), ps
->data_offset
, name
));
1119 if (UNMARSHALLING(ps
)) {
1120 for (i
= 0; i
< str
->str_str_len
; i
++)
1121 str
->buffer
[i
] = CVAL(q
,i
);
1123 for (i
= 0; i
< str
->str_str_len
; i
++)
1124 SCVAL(q
, i
, str
->buffer
[i
]);
1127 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1129 print_asc(5, (unsigned char*)str
->buffer
, str
->str_str_len
);
1131 for (i
= 0; i
< str
->str_str_len
; i
++)
1132 DEBUG(5,("%02x ", str
->buffer
[i
]));
1136 ps
->data_offset
+= str
->str_str_len
;
1141 /******************************************************************
1142 Stream a unicode string, length/buffer specified separately,
1143 in uint16 chars. The unicode string is already in little-endian format.
1144 ********************************************************************/
1146 bool prs_unistr2(bool charmode
, const char *name
, prs_struct
*ps
, int depth
, UNISTR2
*str
)
1149 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
1153 /* If the string is empty, we don't have anything to stream */
1154 if (str
->uni_str_len
==0)
1157 if (UNMARSHALLING(ps
)) {
1158 if (str
->uni_str_len
> str
->uni_max_len
) {
1161 if (str
->uni_max_len
) {
1162 str
->buffer
= PRS_ALLOC_MEM(ps
,uint16
,str
->uni_max_len
);
1163 if (str
->buffer
== NULL
)
1170 p
= (char *)str
->buffer
;
1172 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
1174 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
1179 /******************************************************************
1180 Stream a unicode string, length/buffer specified separately,
1181 in uint16 chars. The unicode string is already in little-endian format.
1182 ********************************************************************/
1184 bool prs_unistr3(bool charmode
, const char *name
, UNISTR3
*str
, prs_struct
*ps
, int depth
)
1187 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
1191 if (UNMARSHALLING(ps
)) {
1192 if (str
->uni_str_len
) {
1193 str
->str
.buffer
= PRS_ALLOC_MEM(ps
,uint16
,str
->uni_str_len
);
1194 if (str
->str
.buffer
== NULL
)
1197 str
->str
.buffer
= NULL
;
1201 p
= (char *)str
->str
.buffer
;
1203 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
1204 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
1209 /*******************************************************************
1210 Stream a unicode null-terminated string. As the string is already
1211 in little-endian format then do it as a stream of bytes.
1212 ********************************************************************/
1214 bool prs_unistr(const char *name
, prs_struct
*ps
, int depth
, UNISTR
*str
)
1216 unsigned int len
= 0;
1217 unsigned char *p
= (unsigned char *)str
->buffer
;
1223 if (MARSHALLING(ps
)) {
1225 for(len
= 0; str
->buffer
[len
] != 0; len
++)
1228 q
= prs_mem_get(ps
, (len
+1)*2);
1234 for(len
= 0; str
->buffer
[len
] != 0; len
++) {
1235 if(ps
->bigendian_data
) {
1236 /* swap bytes - p is little endian, q is big endian. */
1252 * even if the string is 'empty' (only an \0 char)
1253 * at this point the leading \0 hasn't been parsed.
1263 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1264 print_asc(5, (unsigned char*)start
, 2*len
);
1267 else { /* unmarshalling */
1269 uint32 alloc_len
= 0;
1270 q
= ps
->data_p
+ prs_offset(ps
);
1273 * Work out how much space we need and talloc it.
1275 max_len
= (ps
->buffer_size
- ps
->data_offset
)/sizeof(uint16
);
1277 /* the test of the value of *ptr helps to catch the circumstance
1278 where we have an emtpty (non-existent) string in the buffer */
1279 for ( ptr
= (uint16
*)q
; *ptr
++ && (alloc_len
<= max_len
); alloc_len
++)
1283 if (alloc_len
< max_len
)
1286 /* should we allocate anything at all? */
1287 str
->buffer
= PRS_ALLOC_MEM(ps
,uint16
,alloc_len
);
1288 if ((str
->buffer
== NULL
) && (alloc_len
> 0))
1291 p
= (unsigned char *)str
->buffer
;
1294 /* the (len < alloc_len) test is to prevent us from overwriting
1295 memory that is not ours...if we get that far, we have a non-null
1296 terminated string in the buffer and have messed up somewhere */
1297 while ((len
< alloc_len
) && (*(uint16
*)q
!= 0)) {
1298 if(ps
->bigendian_data
)
1300 /* swap bytes - q is big endian, p is little endian. */
1301 p
[0] = (unsigned char)q
[1];
1302 p
[1] = (unsigned char)q
[0];
1307 p
[0] = (unsigned char)q
[0];
1308 p
[1] = (unsigned char)q
[1];
1315 if (len
< alloc_len
) {
1316 /* NULL terminate the UNISTR */
1317 str
->buffer
[len
++] = '\0';
1320 DEBUG(5,("%s%04x %s: ", tab_depth(5,depth
), ps
->data_offset
, name
));
1321 print_asc(5, (unsigned char*)str
->buffer
, 2*len
);
1325 /* set the offset in the prs_struct; 'len' points to the
1326 terminiating NULL in the UNISTR so we need to go one more
1328 ps
->data_offset
+= (len
)*2;
1334 /*******************************************************************
1335 Stream a null-terminated string. len is strlen, and therefore does
1336 not include the null-termination character.
1337 ********************************************************************/
1339 bool prs_string(const char *name
, prs_struct
*ps
, int depth
, char *str
, int max_buf_size
)
1345 if (UNMARSHALLING(ps
))
1346 len
= strlen(&ps
->data_p
[ps
->data_offset
]);
1350 len
= MIN(len
, (max_buf_size
-1));
1352 q
= prs_mem_get(ps
, len
+1);
1356 for(i
= 0; i
< len
; i
++) {
1357 if (UNMARSHALLING(ps
))
1363 /* The terminating null. */
1366 if (MARSHALLING(ps
)) {
1370 ps
->data_offset
+= len
+1;
1372 dump_data(5+depth
, (uint8
*)q
, len
);
1377 bool prs_string_alloc(const char *name
, prs_struct
*ps
, int depth
, const char **str
)
1382 if (UNMARSHALLING(ps
)) {
1383 len
= strlen(&ps
->data_p
[ps
->data_offset
]);
1388 tmp_str
= PRS_ALLOC_MEM(ps
, char, len
+1);
1390 if (tmp_str
== NULL
) {
1394 if (MARSHALLING(ps
)) {
1395 strncpy(tmp_str
, *str
, len
);
1398 if (!prs_string(name
, ps
, depth
, tmp_str
, len
+1)) {
1406 /*******************************************************************
1407 prs_uint16 wrapper. Call this and it sets up a pointer to where the
1408 uint16 should be stored, or gets the size if reading.
1409 ********************************************************************/
1411 bool prs_uint16_pre(const char *name
, prs_struct
*ps
, int depth
, uint16
*data16
, uint32
*offset
)
1413 *offset
= ps
->data_offset
;
1414 if (UNMARSHALLING(ps
)) {
1416 return prs_uint16(name
, ps
, depth
, data16
);
1418 char *q
= prs_mem_get(ps
, sizeof(uint16
));
1421 ps
->data_offset
+= sizeof(uint16
);
1426 /*******************************************************************
1427 prs_uint16 wrapper. call this and it retrospectively stores the size.
1428 does nothing on reading, as that is already handled by ...._pre()
1429 ********************************************************************/
1431 bool prs_uint16_post(const char *name
, prs_struct
*ps
, int depth
, uint16
*data16
,
1432 uint32 ptr_uint16
, uint32 start_offset
)
1434 if (MARSHALLING(ps
)) {
1436 * Writing - temporarily move the offset pointer.
1438 uint16 data_size
= ps
->data_offset
- start_offset
;
1439 uint32 old_offset
= ps
->data_offset
;
1441 ps
->data_offset
= ptr_uint16
;
1442 if(!prs_uint16(name
, ps
, depth
, &data_size
)) {
1443 ps
->data_offset
= old_offset
;
1446 ps
->data_offset
= old_offset
;
1448 ps
->data_offset
= start_offset
+ (uint32
)(*data16
);
1453 /*******************************************************************
1454 prs_uint32 wrapper. Call this and it sets up a pointer to where the
1455 uint32 should be stored, or gets the size if reading.
1456 ********************************************************************/
1458 bool prs_uint32_pre(const char *name
, prs_struct
*ps
, int depth
, uint32
*data32
, uint32
*offset
)
1460 *offset
= ps
->data_offset
;
1461 if (UNMARSHALLING(ps
) && (data32
!= NULL
)) {
1463 return prs_uint32(name
, ps
, depth
, data32
);
1465 ps
->data_offset
+= sizeof(uint32
);
1470 /*******************************************************************
1471 prs_uint32 wrapper. call this and it retrospectively stores the size.
1472 does nothing on reading, as that is already handled by ...._pre()
1473 ********************************************************************/
1475 bool prs_uint32_post(const char *name
, prs_struct
*ps
, int depth
, uint32
*data32
,
1476 uint32 ptr_uint32
, uint32 data_size
)
1478 if (MARSHALLING(ps
)) {
1480 * Writing - temporarily move the offset pointer.
1482 uint32 old_offset
= ps
->data_offset
;
1483 ps
->data_offset
= ptr_uint32
;
1484 if(!prs_uint32(name
, ps
, depth
, &data_size
)) {
1485 ps
->data_offset
= old_offset
;
1488 ps
->data_offset
= old_offset
;
1493 /* useful function to store a structure in rpc wire format */
1494 int tdb_prs_store(TDB_CONTEXT
*tdb
, TDB_DATA kbuf
, prs_struct
*ps
)
1497 dbuf
.dptr
= (uint8
*)ps
->data_p
;
1498 dbuf
.dsize
= prs_offset(ps
);
1499 return tdb_trans_store(tdb
, kbuf
, dbuf
, TDB_REPLACE
);
1502 /* useful function to fetch a structure into rpc wire format */
1503 int tdb_prs_fetch(TDB_CONTEXT
*tdb
, TDB_DATA kbuf
, prs_struct
*ps
, TALLOC_CTX
*mem_ctx
)
1507 prs_init_empty(ps
, mem_ctx
, UNMARSHALL
);
1509 dbuf
= tdb_fetch(tdb
, kbuf
);
1513 prs_give_memory(ps
, (char *)dbuf
.dptr
, dbuf
.dsize
, True
);
1518 /*******************************************************************
1520 ********************************************************************/
1522 bool prs_hash1(prs_struct
*ps
, uint32 offset
, int len
)
1529 #ifdef DEBUG_PASSWORD
1530 DEBUG(100, ("prs_hash1\n"));
1531 dump_data(100, (uint8
*)ps
->sess_key
, 16);
1532 dump_data(100, (uint8
*)q
, len
);
1534 SamOEMhash((uchar
*) q
, (const unsigned char *)ps
->sess_key
, len
);
1536 #ifdef DEBUG_PASSWORD
1537 dump_data(100, (uint8
*)q
, len
);
1543 /*******************************************************************
1544 Create a digest over the entire packet (including the data), and
1545 MD5 it with the session key.
1546 ********************************************************************/
1548 static void schannel_digest(struct schannel_auth_struct
*a
,
1549 enum pipe_auth_level auth_level
,
1550 RPC_AUTH_SCHANNEL_CHK
* verf
,
1551 char *data
, size_t data_len
,
1552 uchar digest_final
[16])
1554 uchar whole_packet_digest
[16];
1556 struct MD5Context ctx3
;
1560 /* verfiy the signature on the packet by MD5 over various bits */
1562 /* use our sequence number, which ensures the packet is not
1564 MD5Update(&ctx3
, zeros
, sizeof(zeros
));
1565 MD5Update(&ctx3
, verf
->sig
, sizeof(verf
->sig
));
1566 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1567 MD5Update(&ctx3
, verf
->confounder
, sizeof(verf
->confounder
));
1569 MD5Update(&ctx3
, (const unsigned char *)data
, data_len
);
1570 MD5Final(whole_packet_digest
, &ctx3
);
1571 dump_data_pw("whole_packet_digest:\n", whole_packet_digest
, sizeof(whole_packet_digest
));
1573 /* MD5 this result and the session key, to prove that
1574 only a valid client could had produced this */
1575 hmac_md5(a
->sess_key
, whole_packet_digest
, sizeof(whole_packet_digest
), digest_final
);
1578 /*******************************************************************
1579 Calculate the key with which to encode the data payload
1580 ********************************************************************/
1582 static void schannel_get_sealing_key(struct schannel_auth_struct
*a
,
1583 RPC_AUTH_SCHANNEL_CHK
*verf
,
1584 uchar sealing_key
[16])
1593 for (i
= 0; i
< sizeof(sess_kf0
); i
++) {
1594 sess_kf0
[i
] = a
->sess_key
[i
] ^ 0xf0;
1597 dump_data_pw("sess_kf0:\n", sess_kf0
, sizeof(sess_kf0
));
1599 /* MD5 of sess_kf0 and 4 zero bytes */
1600 hmac_md5(sess_kf0
, zeros
, 0x4, digest2
);
1601 dump_data_pw("digest2:\n", digest2
, sizeof(digest2
));
1603 /* MD5 of the above result, plus 8 bytes of sequence number */
1604 hmac_md5(digest2
, verf
->seq_num
, sizeof(verf
->seq_num
), sealing_key
);
1605 dump_data_pw("sealing_key:\n", sealing_key
, 16);
1608 /*******************************************************************
1609 Encode or Decode the sequence number (which is symmetric)
1610 ********************************************************************/
1612 static void schannel_deal_with_seq_num(struct schannel_auth_struct
*a
,
1613 RPC_AUTH_SCHANNEL_CHK
*verf
)
1616 uchar sequence_key
[16];
1621 hmac_md5(a
->sess_key
, zeros
, sizeof(zeros
), digest1
);
1622 dump_data_pw("(sequence key) digest1:\n", digest1
, sizeof(digest1
));
1624 hmac_md5(digest1
, verf
->packet_digest
, 8, sequence_key
);
1626 dump_data_pw("sequence_key:\n", sequence_key
, sizeof(sequence_key
));
1628 dump_data_pw("seq_num (before):\n", verf
->seq_num
, sizeof(verf
->seq_num
));
1629 SamOEMhash(verf
->seq_num
, sequence_key
, 8);
1630 dump_data_pw("seq_num (after):\n", verf
->seq_num
, sizeof(verf
->seq_num
));
1633 /*******************************************************************
1634 creates an RPC_AUTH_SCHANNEL_CHK structure.
1635 ********************************************************************/
1637 static bool init_rpc_auth_schannel_chk(RPC_AUTH_SCHANNEL_CHK
* chk
,
1639 const uchar packet_digest
[8],
1640 const uchar seq_num
[8], const uchar confounder
[8])
1645 memcpy(chk
->sig
, sig
, sizeof(chk
->sig
));
1646 memcpy(chk
->packet_digest
, packet_digest
, sizeof(chk
->packet_digest
));
1647 memcpy(chk
->seq_num
, seq_num
, sizeof(chk
->seq_num
));
1648 memcpy(chk
->confounder
, confounder
, sizeof(chk
->confounder
));
1653 /*******************************************************************
1654 Encode a blob of data using the schannel alogrithm, also produceing
1655 a checksum over the original data. We currently only support
1656 signing and sealing togeather - the signing-only code is close, but not
1657 quite compatible with what MS does.
1658 ********************************************************************/
1660 void schannel_encode(struct schannel_auth_struct
*a
, enum pipe_auth_level auth_level
,
1661 enum schannel_direction direction
,
1662 RPC_AUTH_SCHANNEL_CHK
* verf
,
1663 char *data
, size_t data_len
)
1665 uchar digest_final
[16];
1666 uchar confounder
[8];
1668 static const uchar nullbytes
[8] = { 0, };
1670 static const uchar schannel_seal_sig
[8] = SCHANNEL_SEAL_SIGNATURE
;
1671 static const uchar schannel_sign_sig
[8] = SCHANNEL_SIGN_SIGNATURE
;
1672 const uchar
*schannel_sig
= NULL
;
1674 DEBUG(10,("SCHANNEL: schannel_encode seq_num=%d data_len=%lu\n", a
->seq_num
, (unsigned long)data_len
));
1676 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1677 schannel_sig
= schannel_seal_sig
;
1679 schannel_sig
= schannel_sign_sig
;
1682 /* fill the 'confounder' with random data */
1683 generate_random_buffer(confounder
, sizeof(confounder
));
1685 dump_data_pw("a->sess_key:\n", a
->sess_key
, sizeof(a
->sess_key
));
1687 RSIVAL(seq_num
, 0, a
->seq_num
);
1689 switch (direction
) {
1690 case SENDER_IS_INITIATOR
:
1691 SIVAL(seq_num
, 4, 0x80);
1693 case SENDER_IS_ACCEPTOR
:
1694 SIVAL(seq_num
, 4, 0x0);
1698 dump_data_pw("verf->seq_num:\n", seq_num
, sizeof(verf
->seq_num
));
1700 init_rpc_auth_schannel_chk(verf
, schannel_sig
, nullbytes
,
1701 seq_num
, confounder
);
1703 /* produce a digest of the packet to prove it's legit (before we seal it) */
1704 schannel_digest(a
, auth_level
, verf
, data
, data_len
, digest_final
);
1705 memcpy(verf
->packet_digest
, digest_final
, sizeof(verf
->packet_digest
));
1707 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1708 uchar sealing_key
[16];
1710 /* get the key to encode the data with */
1711 schannel_get_sealing_key(a
, verf
, sealing_key
);
1713 /* encode the verification data */
1714 dump_data_pw("verf->confounder:\n", verf
->confounder
, sizeof(verf
->confounder
));
1715 SamOEMhash(verf
->confounder
, sealing_key
, 8);
1717 dump_data_pw("verf->confounder_enc:\n", verf
->confounder
, sizeof(verf
->confounder
));
1719 /* encode the packet payload */
1720 dump_data_pw("data:\n", (const unsigned char *)data
, data_len
);
1721 SamOEMhash((unsigned char *)data
, sealing_key
, data_len
);
1722 dump_data_pw("data_enc:\n", (const unsigned char *)data
, data_len
);
1725 /* encode the sequence number (key based on packet digest) */
1726 /* needs to be done after the sealing, as the original version
1727 is used in the sealing stuff... */
1728 schannel_deal_with_seq_num(a
, verf
);
1733 /*******************************************************************
1734 Decode a blob of data using the schannel alogrithm, also verifiying
1735 a checksum over the original data. We currently can verify signed messages,
1736 as well as decode sealed messages
1737 ********************************************************************/
1739 bool schannel_decode(struct schannel_auth_struct
*a
, enum pipe_auth_level auth_level
,
1740 enum schannel_direction direction
,
1741 RPC_AUTH_SCHANNEL_CHK
* verf
, char *data
, size_t data_len
)
1743 uchar digest_final
[16];
1745 static const uchar schannel_seal_sig
[8] = SCHANNEL_SEAL_SIGNATURE
;
1746 static const uchar schannel_sign_sig
[8] = SCHANNEL_SIGN_SIGNATURE
;
1747 const uchar
*schannel_sig
= NULL
;
1751 DEBUG(10,("SCHANNEL: schannel_decode seq_num=%d data_len=%lu\n", a
->seq_num
, (unsigned long)data_len
));
1753 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1754 schannel_sig
= schannel_seal_sig
;
1756 schannel_sig
= schannel_sign_sig
;
1759 /* Create the expected sequence number for comparison */
1760 RSIVAL(seq_num
, 0, a
->seq_num
);
1762 switch (direction
) {
1763 case SENDER_IS_INITIATOR
:
1764 SIVAL(seq_num
, 4, 0x80);
1766 case SENDER_IS_ACCEPTOR
:
1767 SIVAL(seq_num
, 4, 0x0);
1771 DEBUG(10,("SCHANNEL: schannel_decode seq_num=%d data_len=%lu\n", a
->seq_num
, (unsigned long)data_len
));
1772 dump_data_pw("a->sess_key:\n", a
->sess_key
, sizeof(a
->sess_key
));
1774 dump_data_pw("seq_num:\n", seq_num
, sizeof(seq_num
));
1776 /* extract the sequence number (key based on supplied packet digest) */
1777 /* needs to be done before the sealing, as the original version
1778 is used in the sealing stuff... */
1779 schannel_deal_with_seq_num(a
, verf
);
1781 if (memcmp(verf
->seq_num
, seq_num
, sizeof(seq_num
))) {
1782 /* don't even bother with the below if the sequence number is out */
1783 /* The sequence number is MD5'ed with a key based on the whole-packet
1784 digest, as supplied by the client. We check that it's a valid
1785 checksum after the decode, below
1787 DEBUG(2, ("schannel_decode: FAILED: packet sequence number:\n"));
1788 dump_data(2, verf
->seq_num
, sizeof(verf
->seq_num
));
1789 DEBUG(2, ("should be:\n"));
1790 dump_data(2, seq_num
, sizeof(seq_num
));
1795 if (memcmp(verf
->sig
, schannel_sig
, sizeof(verf
->sig
))) {
1796 /* Validate that the other end sent the expected header */
1797 DEBUG(2, ("schannel_decode: FAILED: packet header:\n"));
1798 dump_data(2, verf
->sig
, sizeof(verf
->sig
));
1799 DEBUG(2, ("should be:\n"));
1800 dump_data(2, schannel_sig
, sizeof(schannel_sig
));
1804 if (auth_level
== PIPE_AUTH_LEVEL_PRIVACY
) {
1805 uchar sealing_key
[16];
1807 /* get the key to extract the data with */
1808 schannel_get_sealing_key(a
, verf
, sealing_key
);
1810 /* extract the verification data */
1811 dump_data_pw("verf->confounder:\n", verf
->confounder
,
1812 sizeof(verf
->confounder
));
1813 SamOEMhash(verf
->confounder
, sealing_key
, 8);
1815 dump_data_pw("verf->confounder_dec:\n", verf
->confounder
,
1816 sizeof(verf
->confounder
));
1818 /* extract the packet payload */
1819 dump_data_pw("data :\n", (const unsigned char *)data
, data_len
);
1820 SamOEMhash((unsigned char *)data
, sealing_key
, data_len
);
1821 dump_data_pw("datadec:\n", (const unsigned char *)data
, data_len
);
1824 /* digest includes 'data' after unsealing */
1825 schannel_digest(a
, auth_level
, verf
, data
, data_len
, digest_final
);
1827 dump_data_pw("Calculated digest:\n", digest_final
,
1828 sizeof(digest_final
));
1829 dump_data_pw("verf->packet_digest:\n", verf
->packet_digest
,
1830 sizeof(verf
->packet_digest
));
1832 /* compare - if the client got the same result as us, then
1833 it must know the session key */
1834 return (memcmp(digest_final
, verf
->packet_digest
,
1835 sizeof(verf
->packet_digest
)) == 0);
1838 /*******************************************************************
1839 creates a new prs_struct containing a DATA_BLOB
1840 ********************************************************************/
1841 bool prs_init_data_blob(prs_struct
*prs
, DATA_BLOB
*blob
, TALLOC_CTX
*mem_ctx
)
1843 if (!prs_init( prs
, RPC_MAX_PDU_FRAG_LEN
, mem_ctx
, MARSHALL
))
1847 if (!prs_copy_data_in(prs
, (char *)blob
->data
, blob
->length
))
1853 /*******************************************************************
1854 return the contents of a prs_struct in a DATA_BLOB
1855 ********************************************************************/
1856 bool prs_data_blob(prs_struct
*prs
, DATA_BLOB
*blob
, TALLOC_CTX
*mem_ctx
)
1858 blob
->length
= prs_data_size(prs
);
1859 blob
->data
= (uint8
*)TALLOC_ZERO_SIZE(mem_ctx
, blob
->length
);
1861 /* set the pointer at the end of the buffer */
1862 prs_set_offset( prs
, prs_data_size(prs
) );
1864 if (!prs_copy_all_data_out((char *)blob
->data
, prs
))