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(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(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(char *name, int v, prs_struct *ps,
48 int from_off, int to_off)
53 if (DEBUGLEVEL < 50) return;
56 slprintf(fname,sizeof(fname)-1, "/tmp/%s_%d.%d.prs", name, v, i);
58 slprintf(fname,sizeof(fname)-1, "/tmp/%s.%d.prs", name, i);
60 fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644);
61 if (fd != -1 || errno != EEXIST) break;
64 sz = write(fd, ps->data_p + from_off, to_off - from_off);
66 if ( (sz != to_off-from_off) || (i != 0) ) {
67 DEBUG(0,("Error writing/closing %s: %ld!=%ld %d\n", fname, (unsigned long)sz, (unsigned long)to_off-from_off, i ));
69 DEBUG(0,("created %s\n", fname));
74 /*******************************************************************
75 Debug output for parsing info
77 XXXX side-effect of this function is to increase the debug depth XXXX.
79 ********************************************************************/
81 void prs_debug(prs_struct *ps, int depth, const char *desc, const char *fn_name)
83 DEBUG(5+depth, ("%s%06x %s %s\n", tab_depth(depth), ps->data_offset, fn_name, desc));
87 * Initialise an expandable parse structure.
89 * @param size Initial buffer size. If >0, a new buffer will be
90 * created with malloc().
92 * @return False if allocation fails, otherwise True.
95 BOOL prs_init(prs_struct *ps, uint32 size, TALLOC_CTX *ctx, BOOL io)
99 ps->bigendian_data = RPC_LITTLE_ENDIAN;
100 ps->align = RPC_PARSE_ALIGN;
101 ps->is_dynamic = False;
108 ps->buffer_size = size;
109 if((ps->data_p = (char *)SMB_MALLOC((size_t)size)) == NULL) {
110 DEBUG(0,("prs_init: malloc fail for %u bytes.\n", (unsigned int)size));
113 memset(ps->data_p, '\0', (size_t)size);
114 ps->is_dynamic = True; /* We own this memory. */
115 } else if (MARSHALLING(ps)) {
116 /* If size is zero and we're marshalling we should allocate memory on demand. */
117 ps->is_dynamic = True;
123 /*******************************************************************
124 Delete the memory in a parse structure - if we own it.
126 NOTE: Contrary to the somewhat confusing naming, this function is not
127 intended for freeing memory allocated by prs_alloc_mem(). That memory
128 is attached to the talloc context given by ps->mem_ctx.
129 ********************************************************************/
131 void prs_mem_free(prs_struct *ps)
134 SAFE_FREE(ps->data_p);
135 ps->is_dynamic = False;
140 /*******************************************************************
141 Clear the memory in a parse structure.
142 ********************************************************************/
144 void prs_mem_clear(prs_struct *ps)
147 memset(ps->data_p, '\0', (size_t)ps->buffer_size);
150 /*******************************************************************
151 Allocate memory when unmarshalling... Always zero clears.
152 ********************************************************************/
154 #if defined(PARANOID_MALLOC_CHECKER)
155 char *prs_alloc_mem_(prs_struct *ps, size_t size, unsigned int count)
157 char *prs_alloc_mem(prs_struct *ps, size_t size, unsigned int count)
163 /* We can't call the type-safe version here. */
164 ret = (char *)_talloc_zero_array(ps->mem_ctx, size, count,
170 /*******************************************************************
171 Return the current talloc context we're using.
172 ********************************************************************/
174 TALLOC_CTX *prs_get_mem_context(prs_struct *ps)
179 /*******************************************************************
180 Hand some already allocated memory to a prs_struct.
181 ********************************************************************/
183 void prs_give_memory(prs_struct *ps, char *buf, uint32 size, BOOL is_dynamic)
185 ps->is_dynamic = is_dynamic;
187 ps->buffer_size = size;
190 /*******************************************************************
191 Take some memory back from a prs_struct.
192 ********************************************************************/
194 char *prs_take_memory(prs_struct *ps, uint32 *psize)
196 char *ret = ps->data_p;
198 *psize = ps->buffer_size;
199 ps->is_dynamic = False;
204 /*******************************************************************
205 Set a prs_struct to exactly a given size. Will grow or tuncate if neccessary.
206 ********************************************************************/
208 BOOL prs_set_buffer_size(prs_struct *ps, uint32 newsize)
210 if (newsize > ps->buffer_size)
211 return prs_force_grow(ps, newsize - ps->buffer_size);
213 if (newsize < ps->buffer_size) {
214 ps->buffer_size = newsize;
216 /* newsize == 0 acts as a free and set pointer to NULL */
218 SAFE_FREE(ps->data_p);
220 ps->data_p = (char *)SMB_REALLOC(ps->data_p, newsize);
222 if (ps->data_p == NULL) {
223 DEBUG(0,("prs_set_buffer_size: Realloc failure for size %u.\n",
224 (unsigned int)newsize));
225 DEBUG(0,("prs_set_buffer_size: Reason %s\n",strerror(errno)));
234 /*******************************************************************
235 Attempt, if needed, to grow a data buffer.
236 Also depends on the data stream mode (io).
237 ********************************************************************/
239 BOOL prs_grow(prs_struct *ps, uint32 extra_space)
243 ps->grow_size = MAX(ps->grow_size, ps->data_offset + extra_space);
245 if(ps->data_offset + extra_space <= ps->buffer_size)
249 * We cannot grow the buffer if we're not reading
250 * into the prs_struct, or if we don't own the memory.
253 if(UNMARSHALLING(ps) || !ps->is_dynamic) {
254 DEBUG(0,("prs_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
255 (unsigned int)extra_space));
260 * Decide how much extra space we really need.
263 extra_space -= (ps->buffer_size - ps->data_offset);
264 if(ps->buffer_size == 0) {
266 * Ensure we have at least a PDU's length, or extra_space, whichever
270 new_size = MAX(RPC_MAX_PDU_FRAG_LEN,extra_space);
272 if((ps->data_p = (char *)SMB_MALLOC(new_size)) == NULL) {
273 DEBUG(0,("prs_grow: Malloc failure for size %u.\n", (unsigned int)new_size));
276 memset(ps->data_p, '\0', (size_t)new_size );
279 * If the current buffer size is bigger than the space needed, just
280 * double it, else add extra_space.
282 new_size = MAX(ps->buffer_size*2, ps->buffer_size + extra_space);
284 if ((ps->data_p = (char *)SMB_REALLOC(ps->data_p, new_size)) == NULL) {
285 DEBUG(0,("prs_grow: Realloc failure for size %u.\n",
286 (unsigned int)new_size));
290 memset(&ps->data_p[ps->buffer_size], '\0', (size_t)(new_size - ps->buffer_size));
292 ps->buffer_size = new_size;
297 /*******************************************************************
298 Attempt to force a data buffer to grow by len bytes.
299 This is only used when appending more data onto a prs_struct
300 when reading an rpc reply, before unmarshalling it.
301 ********************************************************************/
303 BOOL prs_force_grow(prs_struct *ps, uint32 extra_space)
305 uint32 new_size = ps->buffer_size + extra_space;
307 if(!UNMARSHALLING(ps) || !ps->is_dynamic) {
308 DEBUG(0,("prs_force_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
309 (unsigned int)extra_space));
313 if((ps->data_p = (char *)SMB_REALLOC(ps->data_p, new_size)) == NULL) {
314 DEBUG(0,("prs_force_grow: Realloc failure for size %u.\n",
315 (unsigned int)new_size));
319 memset(&ps->data_p[ps->buffer_size], '\0', (size_t)(new_size - ps->buffer_size));
321 ps->buffer_size = new_size;
326 /*******************************************************************
327 Get the data pointer (external interface).
328 ********************************************************************/
330 char *prs_data_p(prs_struct *ps)
335 /*******************************************************************
336 Get the current data size (external interface).
337 ********************************************************************/
339 uint32 prs_data_size(prs_struct *ps)
341 return ps->buffer_size;
344 /*******************************************************************
345 Fetch the current offset (external interface).
346 ********************************************************************/
348 uint32 prs_offset(prs_struct *ps)
350 return ps->data_offset;
353 /*******************************************************************
354 Set the current offset (external interface).
355 ********************************************************************/
357 BOOL prs_set_offset(prs_struct *ps, uint32 offset)
359 if(offset <= ps->data_offset) {
360 ps->data_offset = offset;
364 if(!prs_grow(ps, offset - ps->data_offset))
367 ps->data_offset = offset;
371 /*******************************************************************
372 Append the data from one parse_struct into another.
373 ********************************************************************/
375 BOOL prs_append_prs_data(prs_struct *dst, prs_struct *src)
377 if (prs_offset(src) == 0)
380 if(!prs_grow(dst, prs_offset(src)))
383 memcpy(&dst->data_p[dst->data_offset], src->data_p, (size_t)prs_offset(src));
384 dst->data_offset += prs_offset(src);
389 /*******************************************************************
390 Append some data from one parse_struct into another.
391 ********************************************************************/
393 BOOL prs_append_some_prs_data(prs_struct *dst, prs_struct *src, int32 start, uint32 len)
398 if(!prs_grow(dst, len))
401 memcpy(&dst->data_p[dst->data_offset], src->data_p + start, (size_t)len);
402 dst->data_offset += len;
407 /*******************************************************************
408 Append the data from a buffer into a parse_struct.
409 ********************************************************************/
411 BOOL prs_copy_data_in(prs_struct *dst, const char *src, uint32 len)
416 if(!prs_grow(dst, len))
419 memcpy(&dst->data_p[dst->data_offset], src, (size_t)len);
420 dst->data_offset += len;
425 /*******************************************************************
426 Copy some data from a parse_struct into a buffer.
427 ********************************************************************/
429 BOOL prs_copy_data_out(char *dst, prs_struct *src, uint32 len)
434 if(!prs_mem_get(src, len))
437 memcpy(dst, &src->data_p[src->data_offset], (size_t)len);
438 src->data_offset += len;
443 /*******************************************************************
444 Copy all the data from a parse_struct into a buffer.
445 ********************************************************************/
447 BOOL prs_copy_all_data_out(char *dst, prs_struct *src)
449 uint32 len = prs_offset(src);
454 prs_set_offset(src, 0);
455 return prs_copy_data_out(dst, src, len);
458 /*******************************************************************
459 Set the data as X-endian (external interface).
460 ********************************************************************/
462 void prs_set_endian_data(prs_struct *ps, BOOL endian)
464 ps->bigendian_data = endian;
467 /*******************************************************************
468 Align a the data_len to a multiple of align bytes - filling with
470 ********************************************************************/
472 BOOL prs_align(prs_struct *ps)
474 uint32 mod = ps->data_offset & (ps->align-1);
476 if (ps->align != 0 && mod != 0) {
477 uint32 extra_space = (ps->align - mod);
478 if(!prs_grow(ps, extra_space))
480 memset(&ps->data_p[ps->data_offset], '\0', (size_t)extra_space);
481 ps->data_offset += extra_space;
487 /******************************************************************
488 Align on a 2 byte boundary
489 *****************************************************************/
491 BOOL prs_align_uint16(prs_struct *ps)
494 uint8 old_align = ps->align;
498 ps->align = old_align;
503 /******************************************************************
504 Align on a 8 byte boundary
505 *****************************************************************/
507 BOOL prs_align_uint64(prs_struct *ps)
510 uint8 old_align = ps->align;
514 ps->align = old_align;
519 /******************************************************************
520 Align on a specific byte boundary
521 *****************************************************************/
523 BOOL prs_align_custom(prs_struct *ps, uint8 boundary)
526 uint8 old_align = ps->align;
528 ps->align = boundary;
530 ps->align = old_align;
537 /*******************************************************************
538 Align only if required (for the unistr2 string mainly)
539 ********************************************************************/
541 BOOL prs_align_needed(prs_struct *ps, uint32 needed)
546 return prs_align(ps);
549 /*******************************************************************
550 Ensure we can read/write to a given offset.
551 ********************************************************************/
553 char *prs_mem_get(prs_struct *ps, uint32 extra_size)
555 if(UNMARSHALLING(ps)) {
557 * If reading, ensure that we can read the requested size item.
559 if (ps->data_offset + extra_size > ps->buffer_size) {
560 DEBUG(0,("prs_mem_get: reading data of size %u would overrun "
561 "buffer by %u bytes.\n",
562 (unsigned int)extra_size,
563 (unsigned int)(ps->data_offset + extra_size - ps->buffer_size) ));
568 * Writing - grow the buffer if needed.
570 if(!prs_grow(ps, extra_size))
573 return &ps->data_p[ps->data_offset];
576 /*******************************************************************
577 Change the struct type.
578 ********************************************************************/
580 void prs_switch_type(prs_struct *ps, BOOL io)
582 if ((ps->io ^ io) == True)
586 /*******************************************************************
587 Force a prs_struct to be dynamic even when it's size is 0.
588 ********************************************************************/
590 void prs_force_dynamic(prs_struct *ps)
595 /*******************************************************************
596 Associate a session key with a parse struct.
597 ********************************************************************/
599 void prs_set_session_key(prs_struct *ps, const char sess_key[16])
601 ps->sess_key = sess_key;
604 /*******************************************************************
606 ********************************************************************/
608 BOOL prs_uint8(const char *name, prs_struct *ps, int depth, uint8 *data8)
610 char *q = prs_mem_get(ps, 1);
614 if (UNMARSHALLING(ps))
619 DEBUG(5,("%s%04x %s: %02x\n", tab_depth(depth), ps->data_offset, name, *data8));
621 ps->data_offset += 1;
626 /*******************************************************************
627 Stream a uint16* (allocate memory if unmarshalling)
628 ********************************************************************/
630 BOOL prs_pointer( const char *name, prs_struct *ps, int depth,
631 void *dta, size_t data_size,
632 BOOL(*prs_fn)(const char*, prs_struct*, int, void*) )
634 void ** data = (void **)dta;
637 /* output f000baaa to stream if the pointer is non-zero. */
639 data_p = *data ? 0xf000baaa : 0;
641 if ( !prs_uint32("ptr", ps, depth, &data_p ))
644 /* we're done if there is no data */
649 if (UNMARSHALLING(ps)) {
651 if ( !(*data = PRS_ALLOC_MEM(ps, char, data_size)) )
658 return prs_fn(name, ps, depth, *data);
662 /*******************************************************************
664 ********************************************************************/
666 BOOL prs_uint16(const char *name, prs_struct *ps, int depth, uint16 *data16)
668 char *q = prs_mem_get(ps, sizeof(uint16));
672 if (UNMARSHALLING(ps)) {
673 if (ps->bigendian_data)
674 *data16 = RSVAL(q,0);
678 if (ps->bigendian_data)
684 DEBUG(5,("%s%04x %s: %04x\n", tab_depth(depth), ps->data_offset, name, *data16));
686 ps->data_offset += sizeof(uint16);
691 /*******************************************************************
693 ********************************************************************/
695 BOOL prs_uint32(const char *name, prs_struct *ps, int depth, uint32 *data32)
697 char *q = prs_mem_get(ps, sizeof(uint32));
701 if (UNMARSHALLING(ps)) {
702 if (ps->bigendian_data)
703 *data32 = RIVAL(q,0);
707 if (ps->bigendian_data)
713 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(depth), ps->data_offset, name, *data32));
715 ps->data_offset += sizeof(uint32);
720 /*******************************************************************
722 ********************************************************************/
724 BOOL prs_int32(const char *name, prs_struct *ps, int depth, int32 *data32)
726 char *q = prs_mem_get(ps, sizeof(int32));
730 if (UNMARSHALLING(ps)) {
731 if (ps->bigendian_data)
732 *data32 = RIVALS(q,0);
734 *data32 = IVALS(q,0);
736 if (ps->bigendian_data)
737 RSIVALS(q,0,*data32);
742 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(depth), ps->data_offset, name, *data32));
744 ps->data_offset += sizeof(int32);
749 /*******************************************************************
751 ********************************************************************/
753 BOOL prs_ntstatus(const char *name, prs_struct *ps, int depth, NTSTATUS *status)
755 char *q = prs_mem_get(ps, sizeof(uint32));
759 if (UNMARSHALLING(ps)) {
760 if (ps->bigendian_data)
761 *status = NT_STATUS(RIVAL(q,0));
763 *status = NT_STATUS(IVAL(q,0));
765 if (ps->bigendian_data)
766 RSIVAL(q,0,NT_STATUS_V(*status));
768 SIVAL(q,0,NT_STATUS_V(*status));
771 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth), ps->data_offset, name,
772 nt_errstr(*status)));
774 ps->data_offset += sizeof(uint32);
779 /*******************************************************************
780 Stream a DCE error code
781 ********************************************************************/
783 BOOL prs_dcerpc_status(const char *name, prs_struct *ps, int depth, NTSTATUS *status)
785 char *q = prs_mem_get(ps, sizeof(uint32));
789 if (UNMARSHALLING(ps)) {
790 if (ps->bigendian_data)
791 *status = NT_STATUS(RIVAL(q,0));
793 *status = NT_STATUS(IVAL(q,0));
795 if (ps->bigendian_data)
796 RSIVAL(q,0,NT_STATUS_V(*status));
798 SIVAL(q,0,NT_STATUS_V(*status));
801 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth), ps->data_offset, name,
802 dcerpc_errstr(NT_STATUS_V(*status))));
804 ps->data_offset += sizeof(uint32);
810 /*******************************************************************
812 ********************************************************************/
814 BOOL prs_werror(const char *name, prs_struct *ps, int depth, WERROR *status)
816 char *q = prs_mem_get(ps, sizeof(uint32));
820 if (UNMARSHALLING(ps)) {
821 if (ps->bigendian_data)
822 *status = W_ERROR(RIVAL(q,0));
824 *status = W_ERROR(IVAL(q,0));
826 if (ps->bigendian_data)
827 RSIVAL(q,0,W_ERROR_V(*status));
829 SIVAL(q,0,W_ERROR_V(*status));
832 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth), ps->data_offset, name,
833 dos_errstr(*status)));
835 ps->data_offset += sizeof(uint32);
841 /******************************************************************
842 Stream an array of uint8s. Length is number of uint8s.
843 ********************************************************************/
845 BOOL prs_uint8s(BOOL charmode, const char *name, prs_struct *ps, int depth, uint8 *data8s, int len)
848 char *q = prs_mem_get(ps, len);
852 if (UNMARSHALLING(ps)) {
853 for (i = 0; i < len; i++)
854 data8s[i] = CVAL(q,i);
856 for (i = 0; i < len; i++)
857 SCVAL(q, i, data8s[i]);
860 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset ,name));
862 print_asc(5, (unsigned char*)data8s, len);
864 for (i = 0; i < len; i++)
865 DEBUG(5,("%02x ", data8s[i]));
869 ps->data_offset += len;
874 /******************************************************************
875 Stream an array of uint16s. Length is number of uint16s.
876 ********************************************************************/
878 BOOL prs_uint16s(BOOL charmode, const char *name, prs_struct *ps, int depth, uint16 *data16s, int len)
881 char *q = prs_mem_get(ps, len * sizeof(uint16));
885 if (UNMARSHALLING(ps)) {
886 if (ps->bigendian_data) {
887 for (i = 0; i < len; i++)
888 data16s[i] = RSVAL(q, 2*i);
890 for (i = 0; i < len; i++)
891 data16s[i] = SVAL(q, 2*i);
894 if (ps->bigendian_data) {
895 for (i = 0; i < len; i++)
896 RSSVAL(q, 2*i, data16s[i]);
898 for (i = 0; i < len; i++)
899 SSVAL(q, 2*i, data16s[i]);
903 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
905 print_asc(5, (unsigned char*)data16s, 2*len);
907 for (i = 0; i < len; i++)
908 DEBUG(5,("%04x ", data16s[i]));
912 ps->data_offset += (len * sizeof(uint16));
917 /******************************************************************
918 Start using a function for streaming unicode chars. If unmarshalling,
919 output must be little-endian, if marshalling, input must be little-endian.
920 ********************************************************************/
922 static void dbg_rw_punival(BOOL charmode, const char *name, int depth, prs_struct *ps,
923 char *in_buf, char *out_buf, int len)
927 if (UNMARSHALLING(ps)) {
928 if (ps->bigendian_data) {
929 for (i = 0; i < len; i++)
930 SSVAL(out_buf,2*i,RSVAL(in_buf, 2*i));
932 for (i = 0; i < len; i++)
933 SSVAL(out_buf, 2*i, SVAL(in_buf, 2*i));
936 if (ps->bigendian_data) {
937 for (i = 0; i < len; i++)
938 RSSVAL(in_buf, 2*i, SVAL(out_buf,2*i));
940 for (i = 0; i < len; i++)
941 SSVAL(in_buf, 2*i, SVAL(out_buf,2*i));
945 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
947 print_asc(5, (unsigned char*)out_buf, 2*len);
949 for (i = 0; i < len; i++)
950 DEBUG(5,("%04x ", out_buf[i]));
955 /******************************************************************
956 Stream a unistr. Always little endian.
957 ********************************************************************/
959 BOOL prs_uint16uni(BOOL charmode, const char *name, prs_struct *ps, int depth, uint16 *data16s, int len)
961 char *q = prs_mem_get(ps, len * sizeof(uint16));
965 dbg_rw_punival(charmode, name, depth, ps, q, (char *)data16s, len);
966 ps->data_offset += (len * sizeof(uint16));
971 /******************************************************************
972 Stream an array of uint32s. Length is number of uint32s.
973 ********************************************************************/
975 BOOL prs_uint32s(BOOL charmode, const char *name, prs_struct *ps, int depth, uint32 *data32s, int len)
978 char *q = prs_mem_get(ps, len * sizeof(uint32));
982 if (UNMARSHALLING(ps)) {
983 if (ps->bigendian_data) {
984 for (i = 0; i < len; i++)
985 data32s[i] = RIVAL(q, 4*i);
987 for (i = 0; i < len; i++)
988 data32s[i] = IVAL(q, 4*i);
991 if (ps->bigendian_data) {
992 for (i = 0; i < len; i++)
993 RSIVAL(q, 4*i, data32s[i]);
995 for (i = 0; i < len; i++)
996 SIVAL(q, 4*i, data32s[i]);
1000 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
1002 print_asc(5, (unsigned char*)data32s, 4*len);
1004 for (i = 0; i < len; i++)
1005 DEBUG(5,("%08x ", data32s[i]));
1009 ps->data_offset += (len * sizeof(uint32));
1014 /******************************************************************
1015 Stream an array of unicode string, length/buffer specified separately,
1016 in uint16 chars. The unicode string is already in little-endian format.
1017 ********************************************************************/
1019 BOOL prs_buffer5(BOOL charmode, const char *name, prs_struct *ps, int depth, BUFFER5 *str)
1022 char *q = prs_mem_get(ps, str->buf_len * sizeof(uint16));
1026 /* If the string is empty, we don't have anything to stream */
1027 if (str->buf_len==0)
1030 if (UNMARSHALLING(ps)) {
1031 str->buffer = PRS_ALLOC_MEM(ps,uint16,str->buf_len);
1032 if (str->buffer == NULL)
1036 p = (char *)str->buffer;
1038 dbg_rw_punival(charmode, name, depth, ps, q, p, str->buf_len);
1040 ps->data_offset += (str->buf_len * sizeof(uint16));
1045 /******************************************************************
1046 Stream a "not" unicode string, length/buffer specified separately,
1047 in byte chars. String is in little-endian format.
1048 ********************************************************************/
1050 BOOL prs_regval_buffer(BOOL charmode, const char *name, prs_struct *ps, int depth, REGVAL_BUFFER *buf)
1053 char *q = prs_mem_get(ps, buf->buf_len);
1057 if (UNMARSHALLING(ps)) {
1058 if (buf->buf_len > buf->buf_max_len) {
1061 if ( buf->buf_max_len ) {
1062 buf->buffer = PRS_ALLOC_MEM(ps, uint16, buf->buf_max_len);
1063 if ( buf->buffer == NULL )
1070 p = (char *)buf->buffer;
1072 dbg_rw_punival(charmode, name, depth, ps, q, p, buf->buf_len/2);
1073 ps->data_offset += buf->buf_len;
1078 /******************************************************************
1079 Stream a string, length/buffer specified separately,
1081 ********************************************************************/
1083 BOOL prs_string2(BOOL charmode, const char *name, prs_struct *ps, int depth, STRING2 *str)
1086 char *q = prs_mem_get(ps, str->str_str_len);
1090 if (UNMARSHALLING(ps)) {
1091 if (str->str_str_len > str->str_max_len) {
1094 if (str->str_max_len) {
1095 str->buffer = PRS_ALLOC_MEM(ps,unsigned char, str->str_max_len);
1096 if (str->buffer == NULL)
1100 /* Return early to ensure Coverity isn't confused. */
1101 DEBUG(5,("%s%04x %s: \n", tab_depth(depth), ps->data_offset, name));
1106 if (UNMARSHALLING(ps)) {
1107 for (i = 0; i < str->str_str_len; i++)
1108 str->buffer[i] = CVAL(q,i);
1110 for (i = 0; i < str->str_str_len; i++)
1111 SCVAL(q, i, str->buffer[i]);
1114 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
1116 print_asc(5, (unsigned char*)str->buffer, str->str_str_len);
1118 for (i = 0; i < str->str_str_len; i++)
1119 DEBUG(5,("%02x ", str->buffer[i]));
1123 ps->data_offset += str->str_str_len;
1128 /******************************************************************
1129 Stream a unicode string, length/buffer specified separately,
1130 in uint16 chars. The unicode string is already in little-endian format.
1131 ********************************************************************/
1133 BOOL prs_unistr2(BOOL charmode, const char *name, prs_struct *ps, int depth, UNISTR2 *str)
1136 char *q = prs_mem_get(ps, str->uni_str_len * sizeof(uint16));
1140 /* If the string is empty, we don't have anything to stream */
1141 if (str->uni_str_len==0)
1144 if (UNMARSHALLING(ps)) {
1145 if (str->uni_str_len > str->uni_max_len) {
1148 if (str->uni_max_len) {
1149 str->buffer = PRS_ALLOC_MEM(ps,uint16,str->uni_max_len);
1150 if (str->buffer == NULL)
1157 p = (char *)str->buffer;
1159 dbg_rw_punival(charmode, name, depth, ps, q, p, str->uni_str_len);
1161 ps->data_offset += (str->uni_str_len * sizeof(uint16));
1166 /******************************************************************
1167 Stream a unicode string, length/buffer specified separately,
1168 in uint16 chars. The unicode string is already in little-endian format.
1169 ********************************************************************/
1171 BOOL prs_unistr3(BOOL charmode, const char *name, UNISTR3 *str, prs_struct *ps, int depth)
1174 char *q = prs_mem_get(ps, str->uni_str_len * sizeof(uint16));
1178 if (UNMARSHALLING(ps)) {
1179 if (str->uni_str_len) {
1180 str->str.buffer = PRS_ALLOC_MEM(ps,uint16,str->uni_str_len);
1181 if (str->str.buffer == NULL)
1184 str->str.buffer = NULL;
1188 p = (char *)str->str.buffer;
1190 dbg_rw_punival(charmode, name, depth, ps, q, p, str->uni_str_len);
1191 ps->data_offset += (str->uni_str_len * sizeof(uint16));
1196 /*******************************************************************
1197 Stream a unicode null-terminated string. As the string is already
1198 in little-endian format then do it as a stream of bytes.
1199 ********************************************************************/
1201 BOOL prs_unistr(const char *name, prs_struct *ps, int depth, UNISTR *str)
1203 unsigned int len = 0;
1204 unsigned char *p = (unsigned char *)str->buffer;
1210 if (MARSHALLING(ps)) {
1212 for(len = 0; str->buffer[len] != 0; len++)
1215 q = prs_mem_get(ps, (len+1)*2);
1221 for(len = 0; str->buffer[len] != 0; len++) {
1222 if(ps->bigendian_data) {
1223 /* swap bytes - p is little endian, q is big endian. */
1239 * even if the string is 'empty' (only an \0 char)
1240 * at this point the leading \0 hasn't been parsed.
1250 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
1251 print_asc(5, (unsigned char*)start, 2*len);
1254 else { /* unmarshalling */
1256 uint32 alloc_len = 0;
1257 q = ps->data_p + prs_offset(ps);
1260 * Work out how much space we need and talloc it.
1262 max_len = (ps->buffer_size - ps->data_offset)/sizeof(uint16);
1264 /* the test of the value of *ptr helps to catch the circumstance
1265 where we have an emtpty (non-existent) string in the buffer */
1266 for ( ptr = (uint16 *)q; *ptr++ && (alloc_len <= max_len); alloc_len++)
1270 if (alloc_len < max_len)
1273 /* should we allocate anything at all? */
1274 str->buffer = PRS_ALLOC_MEM(ps,uint16,alloc_len);
1275 if ((str->buffer == NULL) && (alloc_len > 0))
1278 p = (unsigned char *)str->buffer;
1281 /* the (len < alloc_len) test is to prevent us from overwriting
1282 memory that is not ours...if we get that far, we have a non-null
1283 terminated string in the buffer and have messed up somewhere */
1284 while ((len < alloc_len) && (*(uint16 *)q != 0)) {
1285 if(ps->bigendian_data)
1287 /* swap bytes - q is big endian, p is little endian. */
1288 p[0] = (unsigned char)q[1];
1289 p[1] = (unsigned char)q[0];
1294 p[0] = (unsigned char)q[0];
1295 p[1] = (unsigned char)q[1];
1302 if (len < alloc_len) {
1303 /* NULL terminate the UNISTR */
1304 str->buffer[len++] = '\0';
1307 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
1308 print_asc(5, (unsigned char*)str->buffer, 2*len);
1312 /* set the offset in the prs_struct; 'len' points to the
1313 terminiating NULL in the UNISTR so we need to go one more
1315 ps->data_offset += (len)*2;
1321 /*******************************************************************
1322 Stream a null-terminated string. len is strlen, and therefore does
1323 not include the null-termination character.
1324 ********************************************************************/
1326 BOOL prs_string(const char *name, prs_struct *ps, int depth, char *str, int max_buf_size)
1332 if (UNMARSHALLING(ps))
1333 len = strlen(&ps->data_p[ps->data_offset]);
1337 len = MIN(len, (max_buf_size-1));
1339 q = prs_mem_get(ps, len+1);
1343 for(i = 0; i < len; i++) {
1344 if (UNMARSHALLING(ps))
1350 /* The terminating null. */
1353 if (MARSHALLING(ps)) {
1357 ps->data_offset += len+1;
1359 dump_data(5+depth, (uint8 *)q, len);
1364 BOOL prs_string_alloc(const char *name, prs_struct *ps, int depth, const char **str)
1369 if (UNMARSHALLING(ps)) {
1370 len = strlen(&ps->data_p[ps->data_offset]);
1375 tmp_str = PRS_ALLOC_MEM(ps, char, len+1);
1377 if (tmp_str == NULL) {
1381 if (MARSHALLING(ps)) {
1382 strncpy(tmp_str, *str, len);
1385 if (!prs_string(name, ps, depth, tmp_str, len+1)) {
1393 /*******************************************************************
1394 prs_uint16 wrapper. Call this and it sets up a pointer to where the
1395 uint16 should be stored, or gets the size if reading.
1396 ********************************************************************/
1398 BOOL prs_uint16_pre(const char *name, prs_struct *ps, int depth, uint16 *data16, uint32 *offset)
1400 *offset = ps->data_offset;
1401 if (UNMARSHALLING(ps)) {
1403 return prs_uint16(name, ps, depth, data16);
1405 char *q = prs_mem_get(ps, sizeof(uint16));
1408 ps->data_offset += sizeof(uint16);
1413 /*******************************************************************
1414 prs_uint16 wrapper. call this and it retrospectively stores the size.
1415 does nothing on reading, as that is already handled by ...._pre()
1416 ********************************************************************/
1418 BOOL prs_uint16_post(const char *name, prs_struct *ps, int depth, uint16 *data16,
1419 uint32 ptr_uint16, uint32 start_offset)
1421 if (MARSHALLING(ps)) {
1423 * Writing - temporarily move the offset pointer.
1425 uint16 data_size = ps->data_offset - start_offset;
1426 uint32 old_offset = ps->data_offset;
1428 ps->data_offset = ptr_uint16;
1429 if(!prs_uint16(name, ps, depth, &data_size)) {
1430 ps->data_offset = old_offset;
1433 ps->data_offset = old_offset;
1435 ps->data_offset = start_offset + (uint32)(*data16);
1440 /*******************************************************************
1441 prs_uint32 wrapper. Call this and it sets up a pointer to where the
1442 uint32 should be stored, or gets the size if reading.
1443 ********************************************************************/
1445 BOOL prs_uint32_pre(const char *name, prs_struct *ps, int depth, uint32 *data32, uint32 *offset)
1447 *offset = ps->data_offset;
1448 if (UNMARSHALLING(ps) && (data32 != NULL)) {
1450 return prs_uint32(name, ps, depth, data32);
1452 ps->data_offset += sizeof(uint32);
1457 /*******************************************************************
1458 prs_uint32 wrapper. call this and it retrospectively stores the size.
1459 does nothing on reading, as that is already handled by ...._pre()
1460 ********************************************************************/
1462 BOOL prs_uint32_post(const char *name, prs_struct *ps, int depth, uint32 *data32,
1463 uint32 ptr_uint32, uint32 data_size)
1465 if (MARSHALLING(ps)) {
1467 * Writing - temporarily move the offset pointer.
1469 uint32 old_offset = ps->data_offset;
1470 ps->data_offset = ptr_uint32;
1471 if(!prs_uint32(name, ps, depth, &data_size)) {
1472 ps->data_offset = old_offset;
1475 ps->data_offset = old_offset;
1480 /* useful function to store a structure in rpc wire format */
1481 int tdb_prs_store(TDB_CONTEXT *tdb, TDB_DATA kbuf, prs_struct *ps)
1484 dbuf.dptr = (uint8 *)ps->data_p;
1485 dbuf.dsize = prs_offset(ps);
1486 return tdb_trans_store(tdb, kbuf, dbuf, TDB_REPLACE);
1489 int tdb_prs_store_bystring(TDB_CONTEXT *tdb, char *keystr, prs_struct *ps)
1491 TDB_DATA kbuf = string_term_tdb_data(keystr);
1492 return tdb_prs_store(tdb, kbuf, ps);
1495 /* useful function to fetch a structure into rpc wire format */
1496 int tdb_prs_fetch(TDB_CONTEXT *tdb, TDB_DATA kbuf, prs_struct *ps, TALLOC_CTX *mem_ctx)
1500 prs_init(ps, 0, mem_ctx, UNMARSHALL);
1502 dbuf = tdb_fetch(tdb, kbuf);
1506 prs_give_memory(ps, (char *)dbuf.dptr, dbuf.dsize, True);
1511 int tdb_prs_fetch_bystring(TDB_CONTEXT *tdb, char *keystr, prs_struct *ps, TALLOC_CTX *mem_ctx)
1513 TDB_DATA kbuf = string_term_tdb_data(keystr);
1514 return tdb_prs_fetch(tdb, kbuf, ps, mem_ctx);
1517 /*******************************************************************
1519 ********************************************************************/
1521 BOOL prs_hash1(prs_struct *ps, uint32 offset, int len)
1528 #ifdef DEBUG_PASSWORD
1529 DEBUG(100, ("prs_hash1\n"));
1530 dump_data(100, (uint8 *)ps->sess_key, 16);
1531 dump_data(100, (uint8 *)q, len);
1533 SamOEMhash((uchar *) q, (const unsigned char *)ps->sess_key, len);
1535 #ifdef DEBUG_PASSWORD
1536 dump_data(100, (uint8 *)q, len);
1542 /*******************************************************************
1543 Create a digest over the entire packet (including the data), and
1544 MD5 it with the session key.
1545 ********************************************************************/
1547 static void schannel_digest(struct schannel_auth_struct *a,
1548 enum pipe_auth_level auth_level,
1549 RPC_AUTH_SCHANNEL_CHK * verf,
1550 char *data, size_t data_len,
1551 uchar digest_final[16])
1553 uchar whole_packet_digest[16];
1554 static const uchar zeros[4] = { 0, };
1555 struct MD5Context ctx3;
1557 /* verfiy the signature on the packet by MD5 over various bits */
1559 /* use our sequence number, which ensures the packet is not
1561 MD5Update(&ctx3, zeros, sizeof(zeros));
1562 MD5Update(&ctx3, verf->sig, sizeof(verf->sig));
1563 if (auth_level == PIPE_AUTH_LEVEL_PRIVACY) {
1564 MD5Update(&ctx3, verf->confounder, sizeof(verf->confounder));
1566 MD5Update(&ctx3, (const unsigned char *)data, data_len);
1567 MD5Final(whole_packet_digest, &ctx3);
1568 dump_data_pw("whole_packet_digest:\n", whole_packet_digest, sizeof(whole_packet_digest));
1570 /* MD5 this result and the session key, to prove that
1571 only a valid client could had produced this */
1572 hmac_md5(a->sess_key, whole_packet_digest, sizeof(whole_packet_digest), digest_final);
1575 /*******************************************************************
1576 Calculate the key with which to encode the data payload
1577 ********************************************************************/
1579 static void schannel_get_sealing_key(struct schannel_auth_struct *a,
1580 RPC_AUTH_SCHANNEL_CHK *verf,
1581 uchar sealing_key[16])
1583 static const uchar zeros[4] = { 0, };
1588 for (i = 0; i < sizeof(sess_kf0); i++) {
1589 sess_kf0[i] = a->sess_key[i] ^ 0xf0;
1592 dump_data_pw("sess_kf0:\n", sess_kf0, sizeof(sess_kf0));
1594 /* MD5 of sess_kf0 and 4 zero bytes */
1595 hmac_md5(sess_kf0, zeros, 0x4, digest2);
1596 dump_data_pw("digest2:\n", digest2, sizeof(digest2));
1598 /* MD5 of the above result, plus 8 bytes of sequence number */
1599 hmac_md5(digest2, verf->seq_num, sizeof(verf->seq_num), sealing_key);
1600 dump_data_pw("sealing_key:\n", sealing_key, 16);
1603 /*******************************************************************
1604 Encode or Decode the sequence number (which is symmetric)
1605 ********************************************************************/
1607 static void schannel_deal_with_seq_num(struct schannel_auth_struct *a,
1608 RPC_AUTH_SCHANNEL_CHK *verf)
1610 static const uchar zeros[4] = { 0, };
1611 uchar sequence_key[16];
1614 hmac_md5(a->sess_key, zeros, sizeof(zeros), digest1);
1615 dump_data_pw("(sequence key) digest1:\n", digest1, sizeof(digest1));
1617 hmac_md5(digest1, verf->packet_digest, 8, sequence_key);
1619 dump_data_pw("sequence_key:\n", sequence_key, sizeof(sequence_key));
1621 dump_data_pw("seq_num (before):\n", verf->seq_num, sizeof(verf->seq_num));
1622 SamOEMhash(verf->seq_num, sequence_key, 8);
1623 dump_data_pw("seq_num (after):\n", verf->seq_num, sizeof(verf->seq_num));
1626 /*******************************************************************
1627 creates an RPC_AUTH_SCHANNEL_CHK structure.
1628 ********************************************************************/
1630 static BOOL init_rpc_auth_schannel_chk(RPC_AUTH_SCHANNEL_CHK * chk,
1632 const uchar packet_digest[8],
1633 const uchar seq_num[8], const uchar confounder[8])
1638 memcpy(chk->sig, sig, sizeof(chk->sig));
1639 memcpy(chk->packet_digest, packet_digest, sizeof(chk->packet_digest));
1640 memcpy(chk->seq_num, seq_num, sizeof(chk->seq_num));
1641 memcpy(chk->confounder, confounder, sizeof(chk->confounder));
1646 /*******************************************************************
1647 Encode a blob of data using the schannel alogrithm, also produceing
1648 a checksum over the original data. We currently only support
1649 signing and sealing togeather - the signing-only code is close, but not
1650 quite compatible with what MS does.
1651 ********************************************************************/
1653 void schannel_encode(struct schannel_auth_struct *a, enum pipe_auth_level auth_level,
1654 enum schannel_direction direction,
1655 RPC_AUTH_SCHANNEL_CHK * verf,
1656 char *data, size_t data_len)
1658 uchar digest_final[16];
1659 uchar confounder[8];
1661 static const uchar nullbytes[8] = { 0, };
1663 static const uchar schannel_seal_sig[8] = SCHANNEL_SEAL_SIGNATURE;
1664 static const uchar schannel_sign_sig[8] = SCHANNEL_SIGN_SIGNATURE;
1665 const uchar *schannel_sig = NULL;
1667 DEBUG(10,("SCHANNEL: schannel_encode seq_num=%d data_len=%lu\n", a->seq_num, (unsigned long)data_len));
1669 if (auth_level == PIPE_AUTH_LEVEL_PRIVACY) {
1670 schannel_sig = schannel_seal_sig;
1672 schannel_sig = schannel_sign_sig;
1675 /* fill the 'confounder' with random data */
1676 generate_random_buffer(confounder, sizeof(confounder));
1678 dump_data_pw("a->sess_key:\n", a->sess_key, sizeof(a->sess_key));
1680 RSIVAL(seq_num, 0, a->seq_num);
1682 switch (direction) {
1683 case SENDER_IS_INITIATOR:
1684 SIVAL(seq_num, 4, 0x80);
1686 case SENDER_IS_ACCEPTOR:
1687 SIVAL(seq_num, 4, 0x0);
1691 dump_data_pw("verf->seq_num:\n", seq_num, sizeof(verf->seq_num));
1693 init_rpc_auth_schannel_chk(verf, schannel_sig, nullbytes,
1694 seq_num, confounder);
1696 /* produce a digest of the packet to prove it's legit (before we seal it) */
1697 schannel_digest(a, auth_level, verf, data, data_len, digest_final);
1698 memcpy(verf->packet_digest, digest_final, sizeof(verf->packet_digest));
1700 if (auth_level == PIPE_AUTH_LEVEL_PRIVACY) {
1701 uchar sealing_key[16];
1703 /* get the key to encode the data with */
1704 schannel_get_sealing_key(a, verf, sealing_key);
1706 /* encode the verification data */
1707 dump_data_pw("verf->confounder:\n", verf->confounder, sizeof(verf->confounder));
1708 SamOEMhash(verf->confounder, sealing_key, 8);
1710 dump_data_pw("verf->confounder_enc:\n", verf->confounder, sizeof(verf->confounder));
1712 /* encode the packet payload */
1713 dump_data_pw("data:\n", (const unsigned char *)data, data_len);
1714 SamOEMhash((unsigned char *)data, sealing_key, data_len);
1715 dump_data_pw("data_enc:\n", (const unsigned char *)data, data_len);
1718 /* encode the sequence number (key based on packet digest) */
1719 /* needs to be done after the sealing, as the original version
1720 is used in the sealing stuff... */
1721 schannel_deal_with_seq_num(a, verf);
1726 /*******************************************************************
1727 Decode a blob of data using the schannel alogrithm, also verifiying
1728 a checksum over the original data. We currently can verify signed messages,
1729 as well as decode sealed messages
1730 ********************************************************************/
1732 BOOL schannel_decode(struct schannel_auth_struct *a, enum pipe_auth_level auth_level,
1733 enum schannel_direction direction,
1734 RPC_AUTH_SCHANNEL_CHK * verf, char *data, size_t data_len)
1736 uchar digest_final[16];
1738 static const uchar schannel_seal_sig[8] = SCHANNEL_SEAL_SIGNATURE;
1739 static const uchar schannel_sign_sig[8] = SCHANNEL_SIGN_SIGNATURE;
1740 const uchar *schannel_sig = NULL;
1744 DEBUG(10,("SCHANNEL: schannel_decode seq_num=%d data_len=%lu\n", a->seq_num, (unsigned long)data_len));
1746 if (auth_level == PIPE_AUTH_LEVEL_PRIVACY) {
1747 schannel_sig = schannel_seal_sig;
1749 schannel_sig = schannel_sign_sig;
1752 /* Create the expected sequence number for comparison */
1753 RSIVAL(seq_num, 0, a->seq_num);
1755 switch (direction) {
1756 case SENDER_IS_INITIATOR:
1757 SIVAL(seq_num, 4, 0x80);
1759 case SENDER_IS_ACCEPTOR:
1760 SIVAL(seq_num, 4, 0x0);
1764 DEBUG(10,("SCHANNEL: schannel_decode seq_num=%d data_len=%lu\n", a->seq_num, (unsigned long)data_len));
1765 dump_data_pw("a->sess_key:\n", a->sess_key, sizeof(a->sess_key));
1767 dump_data_pw("seq_num:\n", seq_num, sizeof(seq_num));
1769 /* extract the sequence number (key based on supplied packet digest) */
1770 /* needs to be done before the sealing, as the original version
1771 is used in the sealing stuff... */
1772 schannel_deal_with_seq_num(a, verf);
1774 if (memcmp(verf->seq_num, seq_num, sizeof(seq_num))) {
1775 /* don't even bother with the below if the sequence number is out */
1776 /* The sequence number is MD5'ed with a key based on the whole-packet
1777 digest, as supplied by the client. We check that it's a valid
1778 checksum after the decode, below
1780 DEBUG(2, ("schannel_decode: FAILED: packet sequence number:\n"));
1781 dump_data(2, (const uint8 *)verf->seq_num, sizeof(verf->seq_num));
1782 DEBUG(2, ("should be:\n"));
1783 dump_data(2, (const uint8 *)seq_num, sizeof(seq_num));
1788 if (memcmp(verf->sig, schannel_sig, sizeof(verf->sig))) {
1789 /* Validate that the other end sent the expected header */
1790 DEBUG(2, ("schannel_decode: FAILED: packet header:\n"));
1791 dump_data(2, (const uint8 *)verf->sig, sizeof(verf->sig));
1792 DEBUG(2, ("should be:\n"));
1793 dump_data(2, (const uint8 *)schannel_sig, sizeof(schannel_sig));
1797 if (auth_level == PIPE_AUTH_LEVEL_PRIVACY) {
1798 uchar sealing_key[16];
1800 /* get the key to extract the data with */
1801 schannel_get_sealing_key(a, verf, sealing_key);
1803 /* extract the verification data */
1804 dump_data_pw("verf->confounder:\n", verf->confounder,
1805 sizeof(verf->confounder));
1806 SamOEMhash(verf->confounder, sealing_key, 8);
1808 dump_data_pw("verf->confounder_dec:\n", verf->confounder,
1809 sizeof(verf->confounder));
1811 /* extract the packet payload */
1812 dump_data_pw("data :\n", (const unsigned char *)data, data_len);
1813 SamOEMhash((unsigned char *)data, sealing_key, data_len);
1814 dump_data_pw("datadec:\n", (const unsigned char *)data, data_len);
1817 /* digest includes 'data' after unsealing */
1818 schannel_digest(a, auth_level, verf, data, data_len, digest_final);
1820 dump_data_pw("Calculated digest:\n", digest_final,
1821 sizeof(digest_final));
1822 dump_data_pw("verf->packet_digest:\n", verf->packet_digest,
1823 sizeof(verf->packet_digest));
1825 /* compare - if the client got the same result as us, then
1826 it must know the session key */
1827 return (memcmp(digest_final, verf->packet_digest,
1828 sizeof(verf->packet_digest)) == 0);
1831 /*******************************************************************
1832 creates a new prs_struct containing a DATA_BLOB
1833 ********************************************************************/
1834 BOOL prs_init_data_blob(prs_struct *prs, DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
1836 if (!prs_init( prs, RPC_MAX_PDU_FRAG_LEN, mem_ctx, MARSHALL ))
1840 if (!prs_copy_data_in(prs, (char *)blob->data, blob->length))
1846 /*******************************************************************
1847 return the contents of a prs_struct in a DATA_BLOB
1848 ********************************************************************/
1849 BOOL prs_data_blob(prs_struct *prs, DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
1851 blob->length = prs_data_size(prs);
1852 blob->data = (uint8 *)TALLOC_ZERO_SIZE(mem_ctx, blob->length);
1854 /* set the pointer at the end of the buffer */
1855 prs_set_offset( prs, prs_data_size(prs) );
1857 if (!prs_copy_all_data_out((char *)blob->data, prs))