source: trunk/server/librpc/ndr/ndr_string.c

Last change on this file was 752, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.9 2nd part
File size: 21.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 routines for marshalling/unmarshalling string types
5
6 Copyright (C) Andrew Tridgell 2003
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "librpc/ndr/libndr.h"
24
25/**
26 pull a general string from the wire
27*/
28_PUBLIC_ enum ndr_err_code ndr_pull_string(struct ndr_pull *ndr, int ndr_flags, const char **s)
29{
30 char *as=NULL;
31 uint32_t len1, ofs, len2;
32 uint16_t len3;
33 size_t converted_size;
34 int chset = CH_UTF16;
35 unsigned byte_mul = 2;
36 unsigned flags = ndr->flags;
37 unsigned c_len_term = 0;
38
39 if (!(ndr_flags & NDR_SCALARS)) {
40 return NDR_ERR_SUCCESS;
41 }
42
43 if (NDR_BE(ndr)) {
44 chset = CH_UTF16BE;
45 }
46
47 if (flags & LIBNDR_FLAG_STR_ASCII) {
48 chset = CH_DOS;
49 byte_mul = 1;
50 flags &= ~LIBNDR_FLAG_STR_ASCII;
51 }
52
53 if (flags & LIBNDR_FLAG_STR_UTF8) {
54 chset = CH_UTF8;
55 byte_mul = 1;
56 flags &= ~LIBNDR_FLAG_STR_UTF8;
57 }
58
59 flags &= ~LIBNDR_FLAG_STR_CONFORMANT;
60 if (flags & LIBNDR_FLAG_STR_CHARLEN) {
61 c_len_term = 1;
62 flags &= ~LIBNDR_FLAG_STR_CHARLEN;
63 }
64
65 switch (flags & LIBNDR_STRING_FLAGS) {
66 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4:
67 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
68 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
69 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs));
70 if (ofs != 0) {
71 return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n",
72 ndr->flags & LIBNDR_STRING_FLAGS);
73 }
74 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len2));
75 if (len2 > len1) {
76 return ndr_pull_error(ndr, NDR_ERR_STRING,
77 "Bad string lengths len1=%u ofs=%u len2=%u\n",
78 len1, ofs, len2);
79 }
80 NDR_PULL_NEED_BYTES(ndr, (len2 + c_len_term)*byte_mul);
81 if (len2 == 0) {
82 as = talloc_strdup(ndr->current_mem_ctx, "");
83 } else {
84 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
85 CH_UNIX,
86 ndr->data+ndr->offset,
87 (len2 + c_len_term)*byte_mul,
88 (void **)(void *)&as,
89 &converted_size, false))
90 {
91 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
92 "Bad character conversion with flags 0x%x", flags);
93 }
94 }
95 NDR_CHECK(ndr_pull_advance(ndr, (len2 + c_len_term)*byte_mul));
96
97 if (len1 != len2) {
98 DEBUG(6,("len1[%u] != len2[%u] '%s'\n", len1, len2, as));
99 }
100
101 /* this is a way of detecting if a string is sent with the wrong
102 termination */
103 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
104 if (strlen(as) < (len2 + c_len_term)) {
105 DEBUG(6,("short string '%s'\n", as));
106 }
107 } else {
108 if (strlen(as) == (len2 + c_len_term)) {
109 DEBUG(6,("long string '%s'\n", as));
110 }
111 }
112 *s = as;
113 break;
114
115 case LIBNDR_FLAG_STR_SIZE4:
116 case LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
117 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
118 NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul);
119 if (len1 == 0) {
120 as = talloc_strdup(ndr->current_mem_ctx, "");
121 } else {
122 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
123 CH_UNIX,
124 ndr->data+ndr->offset,
125 (len1 + c_len_term)*byte_mul,
126 (void **)(void *)&as,
127 &converted_size, false))
128 {
129 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
130 "Bad character conversion with flags 0x%x", flags);
131 }
132 }
133 NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul));
134
135 /* this is a way of detecting if a string is sent with the wrong
136 termination */
137 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
138 if (strlen(as) < (len1 + c_len_term)) {
139 DEBUG(6,("short string '%s'\n", as));
140 }
141 } else {
142 if (strlen(as) == (len1 + c_len_term)) {
143 DEBUG(6,("long string '%s'\n", as));
144 }
145 }
146 *s = as;
147 break;
148
149 case LIBNDR_FLAG_STR_LEN4:
150 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_NOTERM:
151 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs));
152 if (ofs != 0) {
153 return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n",
154 ndr->flags & LIBNDR_STRING_FLAGS);
155 }
156 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
157 NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul);
158 if (len1 == 0) {
159 as = talloc_strdup(ndr->current_mem_ctx, "");
160 } else {
161 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
162 CH_UNIX,
163 ndr->data+ndr->offset,
164 (len1 + c_len_term)*byte_mul,
165 (void **)(void *)&as,
166 &converted_size, false))
167 {
168 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
169 "Bad character conversion with flags 0x%x", flags);
170 }
171 }
172 NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul));
173
174 /* this is a way of detecting if a string is sent with the wrong
175 termination */
176 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
177 if (strlen(as) < (len1 + c_len_term)) {
178 DEBUG(6,("short string '%s'\n", as));
179 }
180 } else {
181 if (strlen(as) == (len1 + c_len_term)) {
182 DEBUG(6,("long string '%s'\n", as));
183 }
184 }
185 *s = as;
186 break;
187
188
189 case LIBNDR_FLAG_STR_SIZE2:
190 case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM:
191 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3));
192 NDR_PULL_NEED_BYTES(ndr, (len3 + c_len_term)*byte_mul);
193 if (len3 == 0) {
194 as = talloc_strdup(ndr->current_mem_ctx, "");
195 } else {
196 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
197 CH_UNIX,
198 ndr->data+ndr->offset,
199 (len3 + c_len_term)*byte_mul,
200 (void **)(void *)&as,
201 &converted_size, false))
202 {
203 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
204 "Bad character conversion with flags 0x%x", flags);
205 }
206 }
207 NDR_CHECK(ndr_pull_advance(ndr, (len3 + c_len_term)*byte_mul));
208
209 /* this is a way of detecting if a string is sent with the wrong
210 termination */
211 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
212 if (strlen(as) < (len3 + c_len_term)) {
213 DEBUG(6,("short string '%s'\n", as));
214 }
215 } else {
216 if (strlen(as) == (len3 + c_len_term)) {
217 DEBUG(6,("long string '%s'\n", as));
218 }
219 }
220 *s = as;
221 break;
222
223 case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_STR_BYTESIZE:
224 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3));
225 NDR_PULL_NEED_BYTES(ndr, len3);
226 if (len3 == 0) {
227 as = talloc_strdup(ndr->current_mem_ctx, "");
228 } else {
229 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
230 CH_UNIX,
231 ndr->data+ndr->offset, len3,
232 (void **)(void *)&as,
233 &converted_size, false))
234 {
235 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
236 "Bad character conversion with flags 0x%x", flags);
237 }
238 }
239 NDR_CHECK(ndr_pull_advance(ndr, len3));
240 *s = as;
241 break;
242
243 case LIBNDR_FLAG_STR_NULLTERM:
244 if (byte_mul == 1) {
245 len1 = ascii_len_n((const char *)(ndr->data+ndr->offset), ndr->data_size - ndr->offset);
246 } else {
247 len1 = utf16_len_n(ndr->data+ndr->offset, ndr->data_size - ndr->offset);
248 }
249 if (!convert_string_talloc(ndr->current_mem_ctx, chset, CH_UNIX,
250 ndr->data+ndr->offset, len1,
251 (void **)(void *)&as,
252 &converted_size, false))
253 {
254 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
255 "Bad character conversion with flags 0x%x", flags);
256 }
257 NDR_CHECK(ndr_pull_advance(ndr, len1));
258 *s = as;
259 break;
260
261 case LIBNDR_FLAG_STR_NOTERM:
262 if (!(ndr->flags & LIBNDR_FLAG_REMAINING)) {
263 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x (missing NDR_REMAINING)\n",
264 ndr->flags & LIBNDR_STRING_FLAGS);
265 }
266
267 len1 = ndr->data_size - ndr->offset;
268
269 NDR_PULL_NEED_BYTES(ndr, len1);
270 if (len1 == 0) {
271 as = talloc_strdup(ndr->current_mem_ctx, "");
272 } else {
273 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
274 CH_UNIX,
275 ndr->data+ndr->offset, len1,
276 (void **)(void *)&as,
277 &converted_size, false))
278 {
279 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
280 "Bad character conversion with flags 0x%x", flags);
281 }
282 }
283 NDR_CHECK(ndr_pull_advance(ndr, len1));
284
285 *s = as;
286 break;
287
288 default:
289 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
290 ndr->flags & LIBNDR_STRING_FLAGS);
291 }
292
293 return NDR_ERR_SUCCESS;
294}
295
296
297/**
298 push a general string onto the wire
299*/
300_PUBLIC_ enum ndr_err_code ndr_push_string(struct ndr_push *ndr, int ndr_flags, const char *s)
301{
302 ssize_t s_len, c_len;
303 size_t d_len;
304 int chset = CH_UTF16;
305 unsigned flags = ndr->flags;
306 unsigned byte_mul = 2;
307 uint8_t *dest = NULL;
308
309 if (!(ndr_flags & NDR_SCALARS)) {
310 return NDR_ERR_SUCCESS;
311 }
312
313 if (NDR_BE(ndr)) {
314 chset = CH_UTF16BE;
315 }
316
317 s_len = s?strlen(s):0;
318
319 if (flags & LIBNDR_FLAG_STR_ASCII) {
320 chset = CH_DOS;
321 byte_mul = 1;
322 flags &= ~LIBNDR_FLAG_STR_ASCII;
323 }
324
325 if (flags & LIBNDR_FLAG_STR_UTF8) {
326 chset = CH_UTF8;
327 byte_mul = 1;
328 flags &= ~LIBNDR_FLAG_STR_UTF8;
329 }
330
331 flags &= ~LIBNDR_FLAG_STR_CONFORMANT;
332
333 if (!(flags & LIBNDR_FLAG_STR_NOTERM)) {
334 s_len++;
335 }
336 if (!convert_string_talloc(ndr, CH_UNIX, chset, s, s_len,
337 (void **)(void *)&dest, &d_len, false))
338 {
339 return ndr_push_error(ndr, NDR_ERR_CHARCNV,
340 "Bad character push conversion with flags 0x%x", flags);
341 }
342
343 if (flags & LIBNDR_FLAG_STR_BYTESIZE) {
344 c_len = d_len;
345 flags &= ~LIBNDR_FLAG_STR_BYTESIZE;
346 } else if (flags & LIBNDR_FLAG_STR_CHARLEN) {
347 c_len = (d_len / byte_mul)-1;
348 flags &= ~LIBNDR_FLAG_STR_CHARLEN;
349 } else {
350 c_len = d_len / byte_mul;
351 }
352
353 switch ((flags & LIBNDR_STRING_FLAGS) & ~LIBNDR_FLAG_STR_NOTERM) {
354 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4:
355 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
356 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
357 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
358 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
359 break;
360
361 case LIBNDR_FLAG_STR_LEN4:
362 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
363 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
364 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
365 break;
366
367 case LIBNDR_FLAG_STR_SIZE4:
368 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
369 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
370 break;
371
372 case LIBNDR_FLAG_STR_SIZE2:
373 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, c_len));
374 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
375 break;
376
377 case LIBNDR_FLAG_STR_NULLTERM:
378 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
379 break;
380
381 default:
382 if (ndr->flags & LIBNDR_FLAG_REMAINING) {
383 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
384 break;
385 }
386
387 return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
388 ndr->flags & LIBNDR_STRING_FLAGS);
389 }
390
391 talloc_free(dest);
392
393 return NDR_ERR_SUCCESS;
394}
395
396/**
397 push a general string onto the wire
398*/
399_PUBLIC_ size_t ndr_string_array_size(struct ndr_push *ndr, const char *s)
400{
401 size_t c_len;
402 unsigned flags = ndr->flags;
403 unsigned byte_mul = 2;
404 unsigned c_len_term = 1;
405
406 c_len = s?strlen_m(s):0;
407
408 if (flags & (LIBNDR_FLAG_STR_ASCII|LIBNDR_FLAG_STR_UTF8)) {
409 byte_mul = 1;
410 }
411
412 if (flags & LIBNDR_FLAG_STR_NOTERM) {
413 c_len_term = 0;
414 }
415
416 c_len = c_len + c_len_term;
417
418 if (flags & LIBNDR_FLAG_STR_BYTESIZE) {
419 c_len = c_len * byte_mul;
420 }
421
422 return c_len;
423}
424
425_PUBLIC_ void ndr_print_string(struct ndr_print *ndr, const char *name, const char *s)
426{
427 if (s) {
428 ndr->print(ndr, "%-25s: '%s'", name, s);
429 } else {
430 ndr->print(ndr, "%-25s: NULL", name);
431 }
432}
433
434_PUBLIC_ uint32_t ndr_size_string(int ret, const char * const* string, int flags)
435{
436 /* FIXME: Is this correct for all strings ? */
437 if(!(*string)) return ret;
438 return ret+strlen(*string)+1;
439}
440
441/**
442 pull a general string array from the wire
443*/
444_PUBLIC_ enum ndr_err_code ndr_pull_string_array(struct ndr_pull *ndr, int ndr_flags, const char ***_a)
445{
446 const char **a = NULL;
447 uint32_t count;
448 unsigned flags = ndr->flags;
449 unsigned saved_flags = ndr->flags;
450
451 if (!(ndr_flags & NDR_SCALARS)) {
452 return NDR_ERR_SUCCESS;
453 }
454
455 switch (flags & (LIBNDR_FLAG_STR_NULLTERM|LIBNDR_FLAG_STR_NOTERM)) {
456 case LIBNDR_FLAG_STR_NULLTERM:
457 /*
458 * here the strings are null terminated
459 * but also the array is null terminated if LIBNDR_FLAG_REMAINING
460 * is specified
461 */
462 for (count = 0;; count++) {
463 TALLOC_CTX *tmp_ctx;
464 const char *s = NULL;
465 a = talloc_realloc(ndr->current_mem_ctx, a, const char *, count + 2);
466 NDR_ERR_HAVE_NO_MEMORY(a);
467 a[count] = NULL;
468 a[count+1] = NULL;
469
470 tmp_ctx = ndr->current_mem_ctx;
471 ndr->current_mem_ctx = a;
472 NDR_CHECK(ndr_pull_string(ndr, ndr_flags, &s));
473 if ((ndr->data_size - ndr->offset) == 0 && ndr->flags & LIBNDR_FLAG_REMAINING)
474 {
475 a[count] = s;
476 break;
477 }
478 ndr->current_mem_ctx = tmp_ctx;
479 if (strcmp("", s)==0) {
480 a[count] = NULL;
481 break;
482 } else {
483 a[count] = s;
484 }
485 }
486
487 *_a =a;
488 break;
489
490 case LIBNDR_FLAG_STR_NOTERM:
491 if (!(ndr->flags & LIBNDR_FLAG_REMAINING)) {
492 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x (missing NDR_REMAINING)\n",
493 ndr->flags & LIBNDR_STRING_FLAGS);
494 }
495 /*
496 * here the strings are not null terminated
497 * but serarated by a null terminator
498 *
499 * which means the same as:
500 * Every string is null terminated exept the last
501 * string is terminated by the end of the buffer
502 *
503 * as LIBNDR_FLAG_STR_NULLTERM also end at the end
504 * of the buffer, we can pull each string with this flag
505 *
506 * The big difference with the case LIBNDR_FLAG_STR_NOTERM +
507 * LIBNDR_FLAG_REMAINING is that the last string will not be null terminated
508 */
509 ndr->flags &= ~(LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_REMAINING);
510 ndr->flags |= LIBNDR_FLAG_STR_NULLTERM;
511
512 for (count = 0; ((ndr->data_size - ndr->offset) > 0); count++) {
513 TALLOC_CTX *tmp_ctx;
514 const char *s = NULL;
515 a = talloc_realloc(ndr->current_mem_ctx, a, const char *, count + 2);
516 NDR_ERR_HAVE_NO_MEMORY(a);
517 a[count] = NULL;
518 a[count+1] = NULL;
519
520 tmp_ctx = ndr->current_mem_ctx;
521 ndr->current_mem_ctx = a;
522 NDR_CHECK(ndr_pull_string(ndr, ndr_flags, &s));
523 ndr->current_mem_ctx = tmp_ctx;
524 a[count] = s;
525 }
526
527 *_a =a;
528 break;
529
530 default:
531 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
532 ndr->flags & LIBNDR_STRING_FLAGS);
533 }
534
535 ndr->flags = saved_flags;
536 return NDR_ERR_SUCCESS;
537}
538
539/**
540 push a general string array onto the wire
541*/
542_PUBLIC_ enum ndr_err_code ndr_push_string_array(struct ndr_push *ndr, int ndr_flags, const char **a)
543{
544 uint32_t count;
545 unsigned flags = ndr->flags;
546 unsigned saved_flags = ndr->flags;
547
548 if (!(ndr_flags & NDR_SCALARS)) {
549 return NDR_ERR_SUCCESS;
550 }
551
552 switch (flags & LIBNDR_STRING_FLAGS) {
553 case LIBNDR_FLAG_STR_NULLTERM:
554 for (count = 0; a && a[count]; count++) {
555 NDR_CHECK(ndr_push_string(ndr, ndr_flags, a[count]));
556 }
557 /* If LIBNDR_FLAG_REMAINING then we do not add a null terminator to the array */
558 if (!(flags & LIBNDR_FLAG_REMAINING))
559 {
560 NDR_CHECK(ndr_push_string(ndr, ndr_flags, ""));
561 }
562 break;
563
564 case LIBNDR_FLAG_STR_NOTERM:
565 if (!(ndr->flags & LIBNDR_FLAG_REMAINING)) {
566 return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x (missing NDR_REMAINING)\n",
567 ndr->flags & LIBNDR_STRING_FLAGS);
568 }
569
570 for (count = 0; a && a[count]; count++) {
571 if (count > 0) {
572 ndr->flags &= ~(LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_REMAINING);
573 ndr->flags |= LIBNDR_FLAG_STR_NULLTERM;
574 NDR_CHECK(ndr_push_string(ndr, ndr_flags, ""));
575 ndr->flags = saved_flags;
576 }
577 NDR_CHECK(ndr_push_string(ndr, ndr_flags, a[count]));
578 }
579
580 break;
581
582 default:
583 return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
584 ndr->flags & LIBNDR_STRING_FLAGS);
585 }
586
587 ndr->flags = saved_flags;
588 return NDR_ERR_SUCCESS;
589}
590
591_PUBLIC_ void ndr_print_string_array(struct ndr_print *ndr, const char *name, const char **a)
592{
593 uint32_t count;
594 uint32_t i;
595
596 for (count = 0; a && a[count]; count++) {}
597
598 ndr->print(ndr, "%s: ARRAY(%d)", name, count);
599 ndr->depth++;
600 for (i=0;i<count;i++) {
601 char *idx=NULL;
602 if (asprintf(&idx, "[%d]", i) != -1) {
603 ndr_print_string(ndr, idx, a[i]);
604 free(idx);
605 }
606 }
607 ndr->depth--;
608}
609
610_PUBLIC_ size_t ndr_size_string_array(const char **a, uint32_t count, int flags)
611{
612 uint32_t i;
613 size_t size = 0;
614
615 switch (flags & LIBNDR_STRING_FLAGS) {
616 case LIBNDR_FLAG_STR_NULLTERM:
617 for (i = 0; i < count; i++) {
618 size += strlen_m_term(a[i]);
619 }
620 break;
621 case LIBNDR_FLAG_STR_NOTERM:
622 for (i = 0; i < count; i++) {
623 size += strlen_m(a[i]);
624 }
625 break;
626 default:
627 return 0;
628 }
629
630 return size;
631}
632
633/**
634 * Return number of elements in a string including the last (zeroed) element
635 */
636_PUBLIC_ uint32_t ndr_string_length(const void *_var, uint32_t element_size)
637{
638 uint32_t i;
639 uint8_t zero[4] = {0,0,0,0};
640 const char *var = (const char *)_var;
641
642 for (i = 0; memcmp(var+i*element_size,zero,element_size) != 0; i++);
643
644 return i+1;
645}
646
647_PUBLIC_ enum ndr_err_code ndr_check_string_terminator(struct ndr_pull *ndr, uint32_t count, uint32_t element_size)
648{
649 uint32_t i;
650 uint32_t save_offset;
651
652 save_offset = ndr->offset;
653 ndr_pull_advance(ndr, (count - 1) * element_size);
654 NDR_PULL_NEED_BYTES(ndr, element_size);
655
656 for (i = 0; i < element_size; i++) {
657 if (ndr->data[ndr->offset+i] != 0) {
658 ndr->offset = save_offset;
659
660 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "String terminator not present or outside string boundaries");
661 }
662 }
663
664 ndr->offset = save_offset;
665
666 return NDR_ERR_SUCCESS;
667}
668
669_PUBLIC_ enum ndr_err_code ndr_pull_charset(struct ndr_pull *ndr, int ndr_flags, const char **var, uint32_t length, uint8_t byte_mul, charset_t chset)
670{
671 size_t converted_size;
672
673 if (length == 0) {
674 *var = talloc_strdup(ndr->current_mem_ctx, "");
675 return NDR_ERR_SUCCESS;
676 }
677
678 if (NDR_BE(ndr) && chset == CH_UTF16) {
679 chset = CH_UTF16BE;
680 }
681
682 NDR_PULL_NEED_BYTES(ndr, length*byte_mul);
683
684 if (!convert_string_talloc(ndr->current_mem_ctx, chset, CH_UNIX,
685 ndr->data+ndr->offset, length*byte_mul,
686 discard_const_p(void *, var),
687 &converted_size, false))
688 {
689 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
690 "Bad character conversion");
691 }
692 NDR_CHECK(ndr_pull_advance(ndr, length*byte_mul));
693
694 return NDR_ERR_SUCCESS;
695}
696
697_PUBLIC_ enum ndr_err_code ndr_pull_charset_to_null(struct ndr_pull *ndr, int ndr_flags, const char **var, uint32_t length, uint8_t byte_mul, charset_t chset)
698{
699 size_t converted_size;
700 uint32_t str_len;
701
702 if (length == 0) {
703 *var = talloc_strdup(ndr->current_mem_ctx, "");
704 return NDR_ERR_SUCCESS;
705 }
706
707 if (NDR_BE(ndr) && chset == CH_UTF16) {
708 chset = CH_UTF16BE;
709 }
710
711 NDR_PULL_NEED_BYTES(ndr, length*byte_mul);
712
713 str_len = ndr_string_length(ndr->data+ndr->offset, byte_mul);
714 str_len = MIN(str_len, length); /* overrun protection */
715
716 if (!convert_string_talloc(ndr->current_mem_ctx, chset, CH_UNIX,
717 ndr->data+ndr->offset, str_len*byte_mul,
718 discard_const_p(void *, var),
719 &converted_size, false))
720 {
721 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
722 "Bad character conversion");
723 }
724 NDR_CHECK(ndr_pull_advance(ndr, length*byte_mul));
725
726 return NDR_ERR_SUCCESS;
727}
728
729_PUBLIC_ enum ndr_err_code ndr_push_charset(struct ndr_push *ndr, int ndr_flags, const char *var, uint32_t length, uint8_t byte_mul, charset_t chset)
730{
731 ssize_t ret, required;
732
733 if (NDR_BE(ndr) && chset == CH_UTF16) {
734 chset = CH_UTF16BE;
735 }
736
737 required = byte_mul * length;
738
739 NDR_PUSH_NEED_BYTES(ndr, required);
740
741 if (required) {
742 ret = convert_string(CH_UNIX, chset,
743 var, strlen(var),
744 ndr->data+ndr->offset, required, false);
745 if (ret == -1) {
746 return ndr_push_error(ndr, NDR_ERR_CHARCNV,
747 "Bad character conversion");
748 }
749
750 /* Make sure the remaining part of the string is filled with zeroes */
751 if (ret < required) {
752 memset(ndr->data+ndr->offset+ret, 0, required-ret);
753 }
754 }
755
756 ndr->offset += required;
757
758 return NDR_ERR_SUCCESS;
759}
760
761/* Return number of elements in a string in the specified charset */
762_PUBLIC_ uint32_t ndr_charset_length(const void *var, charset_t chset)
763{
764 switch (chset) {
765 /* case CH_UTF16: this has the same value as CH_UTF16LE */
766 case CH_UTF16LE:
767 case CH_UTF16BE:
768 case CH_UTF16MUNGED:
769 case CH_UTF8:
770 return strlen_m_ext_term((const char *)var, CH_UNIX, chset);
771 case CH_DISPLAY:
772 case CH_DOS:
773 case CH_UNIX:
774 return strlen((const char *)var)+1;
775 }
776
777 /* Fallback, this should never happen */
778 return strlen((const char *)var)+1;
779}
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