source: trunk/src/crypt32/decode.c@ 21349

Last change on this file since 21349 was 21311, checked in by vladest, 16 years ago

Added CRYPT32 and MSCMS APIs support
File size: 195.0 KB
Line 
1/*
2 * Copyright 2005-2008 Juan Lang
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
17 *
18 * This file implements ASN.1 DER decoding of a limited set of types.
19 * It isn't a full ASN.1 implementation. Microsoft implements BER
20 * encoding of many of the basic types in msasn1.dll, but that interface isn't
21 * implemented, so I implement them here.
22 *
23 * References:
24 * "A Layman's Guide to a Subset of ASN.1, BER, and DER", by Burton Kaliski
25 * (available online, look for a PDF copy as the HTML versions tend to have
26 * translation errors.)
27 *
28 * RFC3280, http://www.faqs.org/rfcs/rfc3280.html
29 *
30 * MSDN, especially "Constants for CryptEncodeObject and CryptDecodeObject"
31 */
32
33#include "config.h"
34#include "wine/port.h"
35
36#include <assert.h>
37#include <stdarg.h>
38#include <stdio.h>
39#include <stdlib.h>
40
41#define NONAMELESSUNION
42
43#include "windef.h"
44#include "winbase.h"
45#include "wincrypt.h"
46#include "winnls.h"
47#include "snmp.h"
48#include "wine/debug.h"
49#include "wine/exception.h"
50#include "crypt32_private.h"
51
52/* This is a bit arbitrary, but to set some limit: */
53#define MAX_ENCODED_LEN 0x02000000
54
55#define ASN_FLAGS_MASK 0xe0
56#define ASN_TYPE_MASK 0x1f
57
58WINE_DEFAULT_DEBUG_CHANNEL(cryptasn);
59WINE_DECLARE_DEBUG_CHANNEL(crypt);
60
61struct GenericArray
62{
63 DWORD cItems;
64 BYTE *rgItems;
65};
66
67typedef BOOL (*WINAPI CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
68 DWORD, DWORD, void *, DWORD *);
69typedef BOOL (*WINAPI CryptDecodeObjectExFunc)(DWORD, LPCSTR, const BYTE *,
70 DWORD, DWORD, PCRYPT_DECODE_PARA, void *, DWORD *);
71
72/* Internal decoders don't do memory allocation or exception handling, and
73 * they report how many bytes they decoded.
74 */
75typedef BOOL (*InternalDecodeFunc)(const BYTE *pbEncoded, DWORD cbEncoded,
76 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
77
78static BOOL CRYPT_AsnDecodeChoiceOfTimeInternal(const BYTE *pbEncoded,
79 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
80 DWORD *pcbDecoded);
81static BOOL CRYPT_AsnDecodePubKeyInfoInternal(const BYTE *pbEncoded,
82 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
83 DWORD *pcbDecoded);
84/* Like CRYPT_AsnDecodeExtensions, except assumes rgExtension is set ahead of
85 * time, doesn't do memory allocation, and doesn't do exception handling.
86 */
87static BOOL CRYPT_AsnDecodeExtensionsInternal(const BYTE *pbEncoded,
88 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
89 DWORD *pcbDecoded);
90/* Assumes algo->Parameters.pbData is set ahead of time. */
91static BOOL CRYPT_AsnDecodeAlgorithmId(const BYTE *pbEncoded, DWORD cbEncoded,
92 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
93static BOOL CRYPT_AsnDecodeBool(const BYTE *pbEncoded, DWORD cbEncoded,
94 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
95/* Assumes the CRYPT_DATA_BLOB's pbData member has been initialized */
96static BOOL CRYPT_AsnDecodeOctetsInternal(const BYTE *pbEncoded,
97 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
98 DWORD *pcbDecoded);
99/* Doesn't check the tag, assumes the caller does so */
100static BOOL CRYPT_AsnDecodeBitsInternal(const BYTE *pbEncoded, DWORD cbEncoded,
101 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
102static BOOL CRYPT_AsnDecodeIntInternal(const BYTE *pbEncoded, DWORD cbEncoded,
103 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
104/* Like CRYPT_AsnDecodeInteger, but assumes the CRYPT_INTEGER_BLOB's pbData
105 * member has been initialized, doesn't do exception handling, and doesn't do
106 * memory allocation. Also doesn't check tag, assumes the caller has checked
107 * it.
108 */
109static BOOL CRYPT_AsnDecodeIntegerInternal(const BYTE *pbEncoded,
110 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
111 DWORD *pcbDecoded);
112/* Like CRYPT_AsnDecodeInteger, but unsigned. */
113static BOOL CRYPT_AsnDecodeUnsignedIntegerInternal(const BYTE *pbEncoded,
114 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
115 DWORD *pcbDecoded);
116static BOOL CRYPT_AsnDecodePKCSAttributesInternal(const BYTE *pbEncoded,
117 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
118 DWORD *pcbDecoded);
119
120/* Gets the number of length bytes from the given (leading) length byte */
121#define GET_LEN_BYTES(b) ((b) <= 0x80 ? 1 : 1 + ((b) & 0x7f))
122
123/* Helper function to get the encoded length of the data starting at pbEncoded,
124 * where pbEncoded[0] is the tag. If the data are too short to contain a
125 * length or if the length is too large for cbEncoded, sets an appropriate
126 * error code and returns FALSE. If the encoded length is unknown due to
127 * indefinite length encoding, *len is set to CMSG_INDEFINITE_LENGTH.
128 */
129static BOOL CRYPT_GetLengthIndefinite(const BYTE *pbEncoded, DWORD cbEncoded,
130 DWORD *len)
131{
132 BOOL ret;
133
134 if (cbEncoded <= 1)
135 {
136 SetLastError(CRYPT_E_ASN1_CORRUPT);
137 ret = FALSE;
138 }
139 else if (pbEncoded[1] <= 0x7f)
140 {
141 if (pbEncoded[1] + 1 > cbEncoded)
142 {
143 SetLastError(CRYPT_E_ASN1_EOD);
144 ret = FALSE;
145 }
146 else
147 {
148 *len = pbEncoded[1];
149 ret = TRUE;
150 }
151 }
152 else if (pbEncoded[1] == 0x80)
153 {
154 *len = CMSG_INDEFINITE_LENGTH;
155 ret = TRUE;
156 }
157 else
158 {
159 BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
160
161 if (lenLen > sizeof(DWORD) + 1)
162 {
163 SetLastError(CRYPT_E_ASN1_LARGE);
164 ret = FALSE;
165 }
166 else if (lenLen + 2 > cbEncoded)
167 {
168 SetLastError(CRYPT_E_ASN1_CORRUPT);
169 ret = FALSE;
170 }
171 else
172 {
173 DWORD out = 0;
174
175 pbEncoded += 2;
176 while (--lenLen)
177 {
178 out <<= 8;
179 out |= *pbEncoded++;
180 }
181 if (out + lenLen + 1 > cbEncoded)
182 {
183 SetLastError(CRYPT_E_ASN1_EOD);
184 ret = FALSE;
185 }
186 else
187 {
188 *len = out;
189 ret = TRUE;
190 }
191 }
192 }
193 return ret;
194}
195
196/* Like CRYPT_GetLengthIndefinite, but disallows indefinite-length encoding. */
197static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
198{
199 BOOL ret;
200
201 if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, len)) &&
202 *len == CMSG_INDEFINITE_LENGTH)
203 {
204 SetLastError(CRYPT_E_ASN1_CORRUPT);
205 ret = FALSE;
206 }
207 return ret;
208}
209
210/* Helper function to check *pcbStructInfo, set it to the required size, and
211 * optionally to allocate memory. Assumes pvStructInfo is not NULL.
212 * If CRYPT_DECODE_ALLOC_FLAG is set in dwFlags, *pvStructInfo will be set to a
213 * pointer to the newly allocated memory.
214 */
215static BOOL CRYPT_DecodeEnsureSpace(DWORD dwFlags,
216 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
217 DWORD bytesNeeded)
218{
219 BOOL ret = TRUE;
220
221 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
222 {
223 if (pDecodePara && pDecodePara->pfnAlloc)
224 *(BYTE **)pvStructInfo = pDecodePara->pfnAlloc(bytesNeeded);
225 else
226 *(BYTE **)pvStructInfo = LocalAlloc(0, bytesNeeded);
227 if (!*(BYTE **)pvStructInfo)
228 ret = FALSE;
229 else
230 *pcbStructInfo = bytesNeeded;
231 }
232 else if (*pcbStructInfo < bytesNeeded)
233 {
234 *pcbStructInfo = bytesNeeded;
235 SetLastError(ERROR_MORE_DATA);
236 ret = FALSE;
237 }
238 else
239 *pcbStructInfo = bytesNeeded;
240 return ret;
241}
242
243static void CRYPT_FreeSpace(PCRYPT_DECODE_PARA pDecodePara, LPVOID pv)
244{
245 if (pDecodePara && pDecodePara->pfnFree)
246 pDecodePara->pfnFree(pv);
247 else
248 LocalFree(pv);
249}
250
251/* Helper function to check *pcbStructInfo and set it to the required size.
252 * Assumes pvStructInfo is not NULL.
253 */
254static BOOL CRYPT_DecodeCheckSpace(DWORD *pcbStructInfo, DWORD bytesNeeded)
255{
256 BOOL ret;
257
258 if (*pcbStructInfo < bytesNeeded)
259 {
260 *pcbStructInfo = bytesNeeded;
261 SetLastError(ERROR_MORE_DATA);
262 ret = FALSE;
263 }
264 else
265 {
266 *pcbStructInfo = bytesNeeded;
267 ret = TRUE;
268 }
269 return ret;
270}
271
272/* tag:
273 * The expected tag of the item. If tag is 0, decodeFunc is called
274 * regardless of the tag value seen.
275 * offset:
276 * A sequence is decoded into a struct. The offset member is the
277 * offset of this item within that struct.
278 * decodeFunc:
279 * The decoder function to use. If this is NULL, then the member isn't
280 * decoded, but minSize space is reserved for it.
281 * minSize:
282 * The minimum amount of space occupied after decoding. You must set this.
283 * optional:
284 * If true, and the tag doesn't match the expected tag for this item,
285 * or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
286 * filled with 0 for this member.
287 * hasPointer, pointerOffset:
288 * If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
289 * the offset within the struct of the data pointer (or to the
290 * first data pointer, if more than one exist).
291 * size:
292 * Used by CRYPT_AsnDecodeSequence, not for your use.
293 */
294struct AsnDecodeSequenceItem
295{
296 BYTE tag;
297 DWORD offset;
298 InternalDecodeFunc decodeFunc;
299 DWORD minSize;
300 BOOL optional;
301 BOOL hasPointer;
302 DWORD pointerOffset;
303 DWORD size;
304};
305
306/* Decodes the items in a sequence, where the items are described in items,
307 * the encoded data are in pbEncoded with length cbEncoded. Decodes into
308 * pvStructInfo. nextData is a pointer to the memory location at which the
309 * first decoded item with a dynamic pointer should point.
310 * Upon decoding, *cbDecoded is the total number of bytes decoded.
311 * Each item decoder is never called with CRYPT_DECODE_ALLOC_FLAG set.
312 */
313static BOOL CRYPT_AsnDecodeSequenceItems(struct AsnDecodeSequenceItem items[],
314 DWORD cItem, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
315 void *pvStructInfo, BYTE *nextData, DWORD *cbDecoded)
316{
317 BOOL ret;
318 DWORD i, decoded = 0;
319 const BYTE *ptr = pbEncoded;
320
321 TRACE("%p, %d, %p, %d, %08x, %p, %p, %p\n", items, cItem, pbEncoded,
322 cbEncoded, dwFlags, pvStructInfo, nextData, cbDecoded);
323
324 for (i = 0, ret = TRUE; ret && i < cItem; i++)
325 {
326 if (cbEncoded - (ptr - pbEncoded) != 0)
327 {
328 DWORD itemLen;
329
330 if ((ret = CRYPT_GetLengthIndefinite(ptr,
331 cbEncoded - (ptr - pbEncoded), &itemLen)))
332 {
333 BYTE itemLenBytes = GET_LEN_BYTES(ptr[1]);
334
335 if (ptr[0] == items[i].tag || !items[i].tag)
336 {
337 DWORD itemEncodedLen;
338
339 if (itemLen == CMSG_INDEFINITE_LENGTH)
340 itemEncodedLen = cbEncoded - (ptr - pbEncoded);
341 else
342 itemEncodedLen = 1 + itemLenBytes + itemLen;
343 if (nextData && pvStructInfo && items[i].hasPointer)
344 {
345 TRACE("Setting next pointer to %p\n",
346 nextData);
347 *(BYTE **)((BYTE *)pvStructInfo +
348 items[i].pointerOffset) = nextData;
349 }
350 if (items[i].decodeFunc)
351 {
352 DWORD itemDecoded;
353
354 if (pvStructInfo)
355 TRACE("decoding item %d\n", i);
356 else
357 TRACE("sizing item %d\n", i);
358 ret = items[i].decodeFunc(ptr, itemEncodedLen,
359 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
360 pvStructInfo ? (BYTE *)pvStructInfo + items[i].offset
361 : NULL, &items[i].size, &itemDecoded);
362 if (ret)
363 {
364 /* Account for alignment padding */
365 items[i].size = ALIGN_DWORD_PTR(items[i].size);
366 TRACE("item %d size: %d\n", i, items[i].size);
367 if (nextData && items[i].hasPointer &&
368 items[i].size > items[i].minSize)
369 nextData += items[i].size - items[i].minSize;
370 if (itemDecoded > itemEncodedLen)
371 {
372 WARN("decoded length %d exceeds encoded %d\n",
373 itemDecoded, itemEncodedLen);
374 SetLastError(CRYPT_E_ASN1_CORRUPT);
375 ret = FALSE;
376 }
377 else
378 {
379 if (itemLen == CMSG_INDEFINITE_LENGTH)
380 {
381 if (itemDecoded > itemEncodedLen - 2 ||
382 *(ptr + itemDecoded) != 0 ||
383 *(ptr + itemDecoded + 1) != 0)
384 {
385 TRACE("expected 0 TLV\n");
386 SetLastError(CRYPT_E_ASN1_CORRUPT);
387 ret = FALSE;
388 }
389 else
390 itemDecoded += 2;
391 }
392 if (ret)
393 {
394 ptr += itemDecoded;
395 decoded += itemDecoded;
396 TRACE("item %d: decoded %d bytes\n", i,
397 itemDecoded);
398 }
399 }
400 }
401 else if (items[i].optional &&
402 GetLastError() == CRYPT_E_ASN1_BADTAG)
403 {
404 TRACE("skipping optional item %d\n", i);
405 items[i].size = items[i].minSize;
406 SetLastError(NOERROR);
407 ret = TRUE;
408 }
409 else
410 TRACE("item %d failed: %08x\n", i,
411 GetLastError());
412 }
413 else if (itemLen == CMSG_INDEFINITE_LENGTH)
414 {
415 ERR("can't use indefinite length encoding without a decoder\n");
416 SetLastError(CRYPT_E_ASN1_CORRUPT);
417 ret = FALSE;
418 }
419 else
420 {
421 TRACE("item %d: decoded %d bytes\n", i, itemEncodedLen);
422 ptr += itemEncodedLen;
423 decoded += itemEncodedLen;
424 items[i].size = items[i].minSize;
425 }
426 }
427 else if (items[i].optional)
428 {
429 TRACE("skipping optional item %d\n", i);
430 items[i].size = items[i].minSize;
431 }
432 else
433 {
434 TRACE("item %d: tag %02x doesn't match expected %02x\n",
435 i, ptr[0], items[i].tag);
436 SetLastError(CRYPT_E_ASN1_BADTAG);
437 ret = FALSE;
438 }
439 }
440 }
441 else if (items[i].optional)
442 {
443 TRACE("missing optional item %d, skipping\n", i);
444 items[i].size = items[i].minSize;
445 }
446 else
447 {
448 TRACE("not enough bytes for item %d, failing\n", i);
449 SetLastError(CRYPT_E_ASN1_CORRUPT);
450 ret = FALSE;
451 }
452 }
453 if (cbDecoded)
454 *cbDecoded = decoded;
455 TRACE("returning %d\n", ret);
456 return ret;
457}
458
459/* This decodes an arbitrary sequence into a contiguous block of memory
460 * (basically, a struct.) Each element being decoded is described by a struct
461 * AsnDecodeSequenceItem, see above.
462 * startingPointer is an optional pointer to the first place where dynamic
463 * data will be stored. If you know the starting offset, you may pass it
464 * here. Otherwise, pass NULL, and one will be inferred from the items.
465 */
466static BOOL CRYPT_AsnDecodeSequence(struct AsnDecodeSequenceItem items[],
467 DWORD cItem, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
468 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
469 DWORD *pcbDecoded, void *startingPointer)
470{
471 BOOL ret;
472
473 TRACE("%p, %d, %p, %d, %08x, %p, %p, %d, %p\n", items, cItem, pbEncoded,
474 cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
475 startingPointer);
476
477 if (!cbEncoded)
478 {
479 SetLastError(CRYPT_E_ASN1_EOD);
480 return FALSE;
481 }
482 if (pbEncoded[0] == ASN_SEQUENCE)
483 {
484 DWORD dataLen;
485
486 if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
487 {
488 DWORD lenBytes = GET_LEN_BYTES(pbEncoded[1]), cbDecoded;
489 const BYTE *ptr = pbEncoded + 1 + lenBytes;
490 BOOL indefinite = FALSE;
491
492 cbEncoded -= 1 + lenBytes;
493 if (dataLen == CMSG_INDEFINITE_LENGTH)
494 {
495 dataLen = cbEncoded;
496 indefinite = TRUE;
497 }
498 else if (cbEncoded < dataLen)
499 {
500 TRACE("dataLen %d exceeds cbEncoded %d, failing\n", dataLen,
501 cbEncoded);
502 SetLastError(CRYPT_E_ASN1_CORRUPT);
503 ret = FALSE;
504 }
505 if (ret)
506 {
507 ret = CRYPT_AsnDecodeSequenceItems(items, cItem,
508 ptr, dataLen, dwFlags, NULL, NULL, &cbDecoded);
509 if (ret && dataLen == CMSG_INDEFINITE_LENGTH)
510 {
511 if (cbDecoded > cbEncoded - 2)
512 {
513 /* Not enough space for 0 TLV */
514 SetLastError(CRYPT_E_ASN1_CORRUPT);
515 ret = FALSE;
516 }
517 else if (*(ptr + cbDecoded) != 0 ||
518 *(ptr + cbDecoded + 1) != 0)
519 {
520 TRACE("expected 0 TLV\n");
521 SetLastError(CRYPT_E_ASN1_CORRUPT);
522 ret = FALSE;
523 }
524 else
525 cbDecoded += 2;
526 }
527 }
528 if (ret && !indefinite && cbDecoded != dataLen)
529 {
530 TRACE("expected %d decoded, got %d, failing\n", dataLen,
531 cbDecoded);
532 SetLastError(CRYPT_E_ASN1_CORRUPT);
533 ret = FALSE;
534 }
535 if (ret)
536 {
537 DWORD i, bytesNeeded = 0, structSize = 0;
538
539 for (i = 0; i < cItem; i++)
540 {
541 bytesNeeded += items[i].size;
542 structSize += items[i].minSize;
543 }
544 if (pcbDecoded)
545 *pcbDecoded = 1 + lenBytes + cbDecoded;
546 if (!pvStructInfo)
547 *pcbStructInfo = bytesNeeded;
548 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
549 pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
550 {
551 BYTE *nextData;
552
553 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
554 pvStructInfo = *(BYTE **)pvStructInfo;
555 if (startingPointer)
556 nextData = (BYTE *)startingPointer;
557 else
558 nextData = (BYTE *)pvStructInfo + structSize;
559 memset(pvStructInfo, 0, structSize);
560 ret = CRYPT_AsnDecodeSequenceItems(items, cItem,
561 ptr, dataLen, dwFlags, pvStructInfo, nextData,
562 &cbDecoded);
563 if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
564 CRYPT_FreeSpace(pDecodePara, pvStructInfo);
565 }
566 }
567 }
568 }
569 else
570 {
571 SetLastError(CRYPT_E_ASN1_BADTAG);
572 ret = FALSE;
573 }
574 TRACE("returning %d (%08x)\n", ret, GetLastError());
575 return ret;
576}
577
578/* tag:
579 * The expected tag of the entire encoded array (usually a variant
580 * of ASN_SETOF or ASN_SEQUENCEOF.) If tag is 0, decodeFunc is called
581 * regardless of the tag seen.
582 * decodeFunc:
583 * used to decode each item in the array
584 * itemSize:
585 * is the minimum size of each decoded item
586 * hasPointer:
587 * indicates whether each item has a dynamic pointer
588 * pointerOffset:
589 * indicates the offset within itemSize at which the pointer exists
590 */
591struct AsnArrayDescriptor
592{
593 BYTE tag;
594 InternalDecodeFunc decodeFunc;
595 DWORD itemSize;
596 BOOL hasPointer;
597 DWORD pointerOffset;
598};
599
600struct AsnArrayItemSize
601{
602 DWORD encodedLen;
603 DWORD size;
604};
605
606/* Decodes an array of like types into a struct GenericArray.
607 * The layout and decoding of the array are described by a struct
608 * AsnArrayDescriptor.
609 */
610static BOOL CRYPT_AsnDecodeArray(const struct AsnArrayDescriptor *arrayDesc,
611 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
612 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
613 DWORD *pcbDecoded, void *startingPointer)
614{
615 BOOL ret = TRUE;
616
617 TRACE("%p, %p, %d, %08x, %p, %p, %d, %p\n", arrayDesc, pbEncoded,
618 cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
619 startingPointer);
620
621 if (!arrayDesc->tag || pbEncoded[0] == arrayDesc->tag)
622 {
623 DWORD dataLen;
624
625 if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
626 {
627 DWORD bytesNeeded, cItems = 0, decoded;
628 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
629 /* There can be arbitrarily many items, but there is often only one.
630 */
631 struct AsnArrayItemSize itemSize = { 0 }, *itemSizes = &itemSize;
632
633 decoded = 1 + lenBytes;
634 bytesNeeded = sizeof(struct GenericArray);
635 if (dataLen)
636 {
637 const BYTE *ptr;
638 BOOL doneDecoding = FALSE;
639
640 for (ptr = pbEncoded + 1 + lenBytes; ret && !doneDecoding; )
641 {
642 if (dataLen == CMSG_INDEFINITE_LENGTH)
643 {
644 if (ptr[0] == 0)
645 {
646 doneDecoding = TRUE;
647 if (ptr[1] != 0)
648 {
649 SetLastError(CRYPT_E_ASN1_CORRUPT);
650 ret = FALSE;
651 }
652 else
653 decoded += 2;
654 }
655 }
656 else if (ptr - pbEncoded - 1 - lenBytes >= dataLen)
657 doneDecoding = TRUE;
658 if (!doneDecoding)
659 {
660 DWORD itemEncoded, itemDataLen, itemDecoded, size = 0;
661
662 /* Each item decoded may not tolerate extraneous bytes,
663 * so get the length of the next element if known.
664 */
665 if ((ret = CRYPT_GetLengthIndefinite(ptr,
666 cbEncoded - (ptr - pbEncoded), &itemDataLen)))
667 {
668 if (itemDataLen == CMSG_INDEFINITE_LENGTH)
669 itemEncoded = cbEncoded - (ptr - pbEncoded);
670 else
671 itemEncoded = 1 + GET_LEN_BYTES(ptr[1]) +
672 itemDataLen;
673 }
674 if (ret)
675 ret = arrayDesc->decodeFunc(ptr, itemEncoded,
676 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &size,
677 &itemDecoded);
678 if (ret)
679 {
680 cItems++;
681 if (itemSizes != &itemSize)
682 itemSizes = CryptMemRealloc(itemSizes,
683 cItems * sizeof(struct AsnArrayItemSize));
684 else if (cItems > 1)
685 {
686 itemSizes =
687 CryptMemAlloc(
688 cItems * sizeof(struct AsnArrayItemSize));
689 if (itemSizes)
690 memcpy(itemSizes, &itemSize,
691 sizeof(itemSize));
692 }
693 if (itemSizes)
694 {
695 decoded += itemDecoded;
696 itemSizes[cItems - 1].encodedLen = itemEncoded;
697 itemSizes[cItems - 1].size = size;
698 bytesNeeded += size;
699 ptr += itemEncoded;
700 }
701 else
702 ret = FALSE;
703 }
704 }
705 }
706 }
707 if (ret)
708 {
709 if (pcbDecoded)
710 *pcbDecoded = decoded;
711 if (!pvStructInfo)
712 *pcbStructInfo = bytesNeeded;
713 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
714 pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
715 {
716 DWORD i;
717 BYTE *nextData;
718 const BYTE *ptr;
719 struct GenericArray *array;
720
721 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
722 pvStructInfo = *(BYTE **)pvStructInfo;
723 array = (struct GenericArray *)pvStructInfo;
724 array->cItems = cItems;
725 if (startingPointer)
726 array->rgItems = startingPointer;
727 else
728 array->rgItems = (BYTE *)array +
729 sizeof(struct GenericArray);
730 nextData = array->rgItems +
731 array->cItems * arrayDesc->itemSize;
732 for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
733 i < cItems && ptr - pbEncoded - 1 - lenBytes <
734 dataLen; i++)
735 {
736 DWORD itemDecoded;
737
738 if (arrayDesc->hasPointer)
739 *(BYTE **)(array->rgItems + i * arrayDesc->itemSize
740 + arrayDesc->pointerOffset) = nextData;
741 ret = arrayDesc->decodeFunc(ptr,
742 itemSizes[i].encodedLen,
743 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
744 array->rgItems + i * arrayDesc->itemSize,
745 &itemSizes[i].size, &itemDecoded);
746 if (ret)
747 {
748 nextData += itemSizes[i].size - arrayDesc->itemSize;
749 ptr += itemDecoded;
750 }
751 }
752 if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
753 CRYPT_FreeSpace(pDecodePara, pvStructInfo);
754 }
755 }
756 if (itemSizes != &itemSize)
757 CryptMemFree(itemSizes);
758 }
759 }
760 else
761 {
762 SetLastError(CRYPT_E_ASN1_BADTAG);
763 ret = FALSE;
764 }
765 return ret;
766}
767
768/* Decodes a DER-encoded BLOB into a CRYPT_DER_BLOB struct pointed to by
769 * pvStructInfo. The BLOB must be non-empty, otherwise the last error is set
770 * to CRYPT_E_ASN1_CORRUPT.
771 * Warning: assumes the CRYPT_DER_BLOB pointed to by pvStructInfo has pbData
772 * set!
773 */
774static BOOL CRYPT_AsnDecodeDerBlob(const BYTE *pbEncoded, DWORD cbEncoded,
775 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
776{
777 BOOL ret;
778 DWORD dataLen;
779
780 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
781 {
782 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
783 DWORD bytesNeeded = sizeof(CRYPT_DER_BLOB);
784
785 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
786 bytesNeeded += 1 + lenBytes + dataLen;
787
788 if (pcbDecoded)
789 *pcbDecoded = 1 + lenBytes + dataLen;
790 if (!pvStructInfo)
791 *pcbStructInfo = bytesNeeded;
792 else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo, bytesNeeded)))
793 {
794 CRYPT_DER_BLOB *blob;
795
796 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
797 pvStructInfo = *(BYTE **)pvStructInfo;
798 blob = (CRYPT_DER_BLOB *)pvStructInfo;
799 blob->cbData = 1 + lenBytes + dataLen;
800 if (blob->cbData)
801 {
802 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
803 blob->pbData = (BYTE *)pbEncoded;
804 else
805 {
806 assert(blob->pbData);
807 memcpy(blob->pbData, pbEncoded, blob->cbData);
808 }
809 }
810 else
811 {
812 SetLastError(CRYPT_E_ASN1_CORRUPT);
813 ret = FALSE;
814 }
815 }
816 }
817 return ret;
818}
819
820/* Like CRYPT_AsnDecodeBitsInternal, but swaps the bytes */
821static BOOL CRYPT_AsnDecodeBitsSwapBytes(const BYTE *pbEncoded,
822 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
823 DWORD *pcbDecoded)
824{
825 BOOL ret;
826
827 TRACE("(%p, %d, 0x%08x, %p, %d, %p)\n", pbEncoded, cbEncoded, dwFlags,
828 pvStructInfo, *pcbStructInfo, pcbDecoded);
829
830 /* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
831 * place.
832 */
833 ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
834 dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pvStructInfo, pcbStructInfo,
835 pcbDecoded);
836 if (ret && pvStructInfo)
837 {
838 CRYPT_BIT_BLOB *blob = (CRYPT_BIT_BLOB *)pvStructInfo;
839
840 if (blob->cbData)
841 {
842 DWORD i;
843 BYTE temp;
844
845 for (i = 0; i < blob->cbData / 2; i++)
846 {
847 temp = blob->pbData[i];
848 blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
849 blob->pbData[blob->cbData - i - 1] = temp;
850 }
851 }
852 }
853 TRACE("returning %d (%08x)\n", ret, GetLastError());
854 return ret;
855}
856
857static BOOL WINAPI CRYPT_AsnDecodeCertSignedContent(DWORD dwCertEncodingType,
858 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
859 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
860{
861 BOOL ret = TRUE;
862
863 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
864 pDecodePara, pvStructInfo, *pcbStructInfo);
865
866 __TRY
867 {
868 struct AsnDecodeSequenceItem items[] = {
869 { 0, offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned),
870 CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
871 offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned.pbData), 0 },
872 { ASN_SEQUENCEOF, offsetof(CERT_SIGNED_CONTENT_INFO,
873 SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
874 sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
875 offsetof(CERT_SIGNED_CONTENT_INFO, SignatureAlgorithm.pszObjId), 0 },
876 { ASN_BITSTRING, offsetof(CERT_SIGNED_CONTENT_INFO, Signature),
877 CRYPT_AsnDecodeBitsSwapBytes, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
878 offsetof(CERT_SIGNED_CONTENT_INFO, Signature.pbData), 0 },
879 };
880
881 if (dwFlags & CRYPT_DECODE_NO_SIGNATURE_BYTE_REVERSAL_FLAG)
882 items[2].decodeFunc = CRYPT_AsnDecodeBitsInternal;
883 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
884 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
885 pcbStructInfo, NULL, NULL);
886 }
887 __EXCEPT(1)
888 {
889 SetLastError(STATUS_ACCESS_VIOLATION);
890 ret = FALSE;
891 }
892 __ENDTRY
893
894 TRACE("Returning %d (%08x)\n", ret, GetLastError());
895 return ret;
896}
897
898static BOOL CRYPT_AsnDecodeCertVersion(const BYTE *pbEncoded, DWORD cbEncoded,
899 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
900{
901 BOOL ret;
902 DWORD dataLen;
903
904 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
905 {
906 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
907
908 ret = CRYPT_AsnDecodeIntInternal(pbEncoded + 1 + lenBytes, dataLen,
909 dwFlags, pvStructInfo, pcbStructInfo, NULL);
910 if (pcbDecoded)
911 *pcbDecoded = 1 + lenBytes + dataLen;
912 }
913 return ret;
914}
915
916static BOOL CRYPT_AsnDecodeValidity(const BYTE *pbEncoded, DWORD cbEncoded,
917 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
918{
919 BOOL ret;
920
921 struct AsnDecodeSequenceItem items[] = {
922 { 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotBefore),
923 CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
924 { 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotAfter),
925 CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
926 };
927
928 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
929 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
930 pcbDecoded, NULL);
931 return ret;
932}
933
934static BOOL CRYPT_AsnDecodeCertExtensions(const BYTE *pbEncoded,
935 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
936 DWORD *pcbDecoded)
937{
938 BOOL ret;
939 DWORD dataLen;
940
941 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
942 {
943 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
944
945 ret = CRYPT_AsnDecodeExtensionsInternal(pbEncoded + 1 + lenBytes,
946 dataLen, dwFlags, pvStructInfo, pcbStructInfo, NULL);
947 if (ret && pcbDecoded)
948 *pcbDecoded = 1 + lenBytes + dataLen;
949 }
950 return ret;
951}
952
953static BOOL CRYPT_AsnDecodeCertInfo(DWORD dwCertEncodingType,
954 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
955 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
956{
957 BOOL ret = TRUE;
958 struct AsnDecodeSequenceItem items[] = {
959 { ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(CERT_INFO, dwVersion),
960 CRYPT_AsnDecodeCertVersion, sizeof(DWORD), TRUE, FALSE, 0, 0 },
961 { ASN_INTEGER, offsetof(CERT_INFO, SerialNumber),
962 CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
963 TRUE, offsetof(CERT_INFO, SerialNumber.pbData), 0 },
964 { ASN_SEQUENCEOF, offsetof(CERT_INFO, SignatureAlgorithm),
965 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
966 FALSE, TRUE, offsetof(CERT_INFO, SignatureAlgorithm.pszObjId), 0 },
967 { 0, offsetof(CERT_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
968 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
969 Issuer.pbData) },
970 { ASN_SEQUENCEOF, offsetof(CERT_INFO, NotBefore),
971 CRYPT_AsnDecodeValidity, sizeof(CERT_PRIVATE_KEY_VALIDITY), FALSE,
972 FALSE, 0 },
973 { 0, offsetof(CERT_INFO, Subject), CRYPT_AsnDecodeDerBlob,
974 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
975 Subject.pbData) },
976 { ASN_SEQUENCEOF, offsetof(CERT_INFO, SubjectPublicKeyInfo),
977 CRYPT_AsnDecodePubKeyInfoInternal, sizeof(CERT_PUBLIC_KEY_INFO),
978 FALSE, TRUE, offsetof(CERT_INFO,
979 SubjectPublicKeyInfo.Algorithm.Parameters.pbData), 0 },
980 { ASN_BITSTRING, offsetof(CERT_INFO, IssuerUniqueId),
981 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
982 offsetof(CERT_INFO, IssuerUniqueId.pbData), 0 },
983 { ASN_BITSTRING, offsetof(CERT_INFO, SubjectUniqueId),
984 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
985 offsetof(CERT_INFO, SubjectUniqueId.pbData), 0 },
986 { ASN_CONTEXT | ASN_CONSTRUCTOR | 3, offsetof(CERT_INFO, cExtension),
987 CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
988 offsetof(CERT_INFO, rgExtension), 0 },
989 };
990
991 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
992 pDecodePara, pvStructInfo, *pcbStructInfo);
993
994 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
995 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo,
996 NULL, NULL);
997 if (ret && pvStructInfo)
998 {
999 CERT_INFO *info;
1000
1001 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1002 info = *(CERT_INFO **)pvStructInfo;
1003 else
1004 info = (CERT_INFO *)pvStructInfo;
1005 if (!info->SerialNumber.cbData || !info->Issuer.cbData ||
1006 !info->Subject.cbData)
1007 {
1008 SetLastError(CRYPT_E_ASN1_CORRUPT);
1009 /* Don't need to deallocate, because it should have failed on the
1010 * first pass (and no memory was allocated.)
1011 */
1012 ret = FALSE;
1013 }
1014 }
1015
1016 TRACE("Returning %d (%08x)\n", ret, GetLastError());
1017 return ret;
1018}
1019
1020static BOOL WINAPI CRYPT_AsnDecodeCert(DWORD dwCertEncodingType,
1021 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1022 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1023{
1024 BOOL ret = FALSE;
1025
1026 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1027 pDecodePara, pvStructInfo, *pcbStructInfo);
1028
1029 __TRY
1030 {
1031 DWORD size = 0;
1032
1033 /* Unless told not to, first try to decode it as a signed cert. */
1034 if (!(dwFlags & CRYPT_DECODE_TO_BE_SIGNED_FLAG))
1035 {
1036 PCERT_SIGNED_CONTENT_INFO signedCert = NULL;
1037
1038 ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType,
1039 X509_CERT, pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
1040 (BYTE *)&signedCert, &size);
1041 if (ret)
1042 {
1043 size = 0;
1044 ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
1045 X509_CERT_TO_BE_SIGNED, signedCert->ToBeSigned.pbData,
1046 signedCert->ToBeSigned.cbData, dwFlags, pDecodePara,
1047 pvStructInfo, pcbStructInfo);
1048 LocalFree(signedCert);
1049 }
1050 }
1051 /* Failing that, try it as an unsigned cert */
1052 if (!ret)
1053 {
1054 size = 0;
1055 ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
1056 X509_CERT_TO_BE_SIGNED, pbEncoded, cbEncoded, dwFlags,
1057 pDecodePara, pvStructInfo, pcbStructInfo);
1058 }
1059 }
1060 __EXCEPT(1)
1061 {
1062 SetLastError(STATUS_ACCESS_VIOLATION);
1063 }
1064 __ENDTRY
1065
1066 TRACE("Returning %d (%08x)\n", ret, GetLastError());
1067 return ret;
1068}
1069
1070static BOOL CRYPT_AsnDecodeCRLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
1071 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1072{
1073 BOOL ret;
1074 struct AsnDecodeSequenceItem items[] = {
1075 { ASN_INTEGER, offsetof(CRL_ENTRY, SerialNumber),
1076 CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE,
1077 offsetof(CRL_ENTRY, SerialNumber.pbData), 0 },
1078 { 0, offsetof(CRL_ENTRY, RevocationDate),
1079 CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
1080 { ASN_SEQUENCEOF, offsetof(CRL_ENTRY, cExtension),
1081 CRYPT_AsnDecodeExtensionsInternal, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
1082 offsetof(CRL_ENTRY, rgExtension), 0 },
1083 };
1084 PCRL_ENTRY entry = (PCRL_ENTRY)pvStructInfo;
1085
1086 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags, entry,
1087 *pcbStructInfo);
1088
1089 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
1090 pbEncoded, cbEncoded, dwFlags, NULL, entry, pcbStructInfo, pcbDecoded,
1091 entry ? entry->SerialNumber.pbData : NULL);
1092 if (ret && entry && !entry->SerialNumber.cbData)
1093 {
1094 WARN("empty CRL entry serial number\n");
1095 SetLastError(CRYPT_E_ASN1_CORRUPT);
1096 ret = FALSE;
1097 }
1098 return ret;
1099}
1100
1101/* Warning: assumes pvStructInfo is a struct GenericArray whose rgItems has
1102 * been set prior to calling.
1103 */
1104static BOOL CRYPT_AsnDecodeCRLEntries(const BYTE *pbEncoded, DWORD cbEncoded,
1105 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1106{
1107 BOOL ret;
1108 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1109 CRYPT_AsnDecodeCRLEntry, sizeof(CRL_ENTRY), TRUE,
1110 offsetof(CRL_ENTRY, SerialNumber.pbData) };
1111 struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
1112
1113 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
1114 pvStructInfo, *pcbStructInfo, pcbDecoded);
1115
1116 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1117 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
1118 entries ? entries->rgItems : NULL);
1119 TRACE("Returning %d (%08x)\n", ret, GetLastError());
1120 return ret;
1121}
1122
1123static BOOL CRYPT_AsnDecodeCRLInfo(DWORD dwCertEncodingType,
1124 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1125 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1126{
1127 struct AsnDecodeSequenceItem items[] = {
1128 { ASN_INTEGER, offsetof(CRL_INFO, dwVersion),
1129 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
1130 { ASN_SEQUENCEOF, offsetof(CRL_INFO, SignatureAlgorithm),
1131 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
1132 FALSE, TRUE, offsetof(CRL_INFO, SignatureAlgorithm.pszObjId), 0 },
1133 { 0, offsetof(CRL_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
1134 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CRL_INFO,
1135 Issuer.pbData) },
1136 { 0, offsetof(CRL_INFO, ThisUpdate), CRYPT_AsnDecodeChoiceOfTimeInternal,
1137 sizeof(FILETIME), FALSE, FALSE, 0 },
1138 { 0, offsetof(CRL_INFO, NextUpdate), CRYPT_AsnDecodeChoiceOfTimeInternal,
1139 sizeof(FILETIME), TRUE, FALSE, 0 },
1140 { ASN_SEQUENCEOF, offsetof(CRL_INFO, cCRLEntry),
1141 CRYPT_AsnDecodeCRLEntries, sizeof(struct GenericArray), TRUE, TRUE,
1142 offsetof(CRL_INFO, rgCRLEntry), 0 },
1143 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_INFO, cExtension),
1144 CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
1145 offsetof(CRL_INFO, rgExtension), 0 },
1146 };
1147 BOOL ret = TRUE;
1148
1149 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1150 pDecodePara, pvStructInfo, *pcbStructInfo);
1151
1152 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
1153 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo,
1154 NULL, NULL);
1155
1156 TRACE("Returning %d (%08x)\n", ret, GetLastError());
1157 return ret;
1158}
1159
1160static BOOL WINAPI CRYPT_AsnDecodeCRL(DWORD dwCertEncodingType,
1161 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1162 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1163{
1164 BOOL ret = FALSE;
1165
1166 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1167 pDecodePara, pvStructInfo, *pcbStructInfo);
1168
1169 __TRY
1170 {
1171 DWORD size = 0;
1172
1173 /* Unless told not to, first try to decode it as a signed crl. */
1174 if (!(dwFlags & CRYPT_DECODE_TO_BE_SIGNED_FLAG))
1175 {
1176 PCERT_SIGNED_CONTENT_INFO signedCrl = NULL;
1177
1178 ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType,
1179 X509_CERT, pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
1180 (BYTE *)&signedCrl, &size);
1181 if (ret)
1182 {
1183 size = 0;
1184 ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
1185 X509_CERT_CRL_TO_BE_SIGNED, signedCrl->ToBeSigned.pbData,
1186 signedCrl->ToBeSigned.cbData, dwFlags, pDecodePara,
1187 pvStructInfo, pcbStructInfo);
1188 LocalFree(signedCrl);
1189 }
1190 }
1191 /* Failing that, try it as an unsigned crl */
1192 if (!ret)
1193 {
1194 size = 0;
1195 ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
1196 X509_CERT_CRL_TO_BE_SIGNED, pbEncoded, cbEncoded,
1197 dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
1198 }
1199 }
1200 __EXCEPT(1)
1201 {
1202 SetLastError(STATUS_ACCESS_VIOLATION);
1203 }
1204 __ENDTRY
1205
1206 TRACE("Returning %d (%08x)\n", ret, GetLastError());
1207 return ret;
1208}
1209
1210static BOOL CRYPT_AsnDecodeOidIgnoreTag(const BYTE *pbEncoded, DWORD cbEncoded,
1211 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1212{
1213 BOOL ret = TRUE;
1214 DWORD dataLen;
1215
1216 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1217 pvStructInfo, *pcbStructInfo);
1218
1219 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1220 {
1221 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1222 DWORD bytesNeeded = sizeof(LPSTR);
1223
1224 if (dataLen)
1225 {
1226 /* The largest possible string for the first two components
1227 * is 2.175 (= 2 * 40 + 175 = 255), so this is big enough.
1228 */
1229 char firstTwo[6];
1230 const BYTE *ptr;
1231
1232 snprintf(firstTwo, sizeof(firstTwo), "%d.%d",
1233 pbEncoded[1 + lenBytes] / 40,
1234 pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
1235 * 40);
1236 bytesNeeded += strlen(firstTwo) + 1;
1237 for (ptr = pbEncoded + 2 + lenBytes; ret &&
1238 ptr - pbEncoded - 1 - lenBytes < dataLen; )
1239 {
1240 /* large enough for ".4000000" */
1241 char str[9];
1242 int val = 0;
1243
1244 while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1245 (*ptr & 0x80))
1246 {
1247 val <<= 7;
1248 val |= *ptr & 0x7f;
1249 ptr++;
1250 }
1251 if (ptr - pbEncoded - 1 - lenBytes >= dataLen ||
1252 (*ptr & 0x80))
1253 {
1254 SetLastError(CRYPT_E_ASN1_CORRUPT);
1255 ret = FALSE;
1256 }
1257 else
1258 {
1259 val <<= 7;
1260 val |= *ptr++;
1261 snprintf(str, sizeof(str), ".%d", val);
1262 bytesNeeded += strlen(str);
1263 }
1264 }
1265 }
1266 if (pcbDecoded)
1267 *pcbDecoded = 1 + lenBytes + dataLen;
1268 if (!pvStructInfo)
1269 *pcbStructInfo = bytesNeeded;
1270 else if (*pcbStructInfo < bytesNeeded)
1271 {
1272 *pcbStructInfo = bytesNeeded;
1273 SetLastError(ERROR_MORE_DATA);
1274 ret = FALSE;
1275 }
1276 else
1277 {
1278 if (dataLen)
1279 {
1280 const BYTE *ptr;
1281 LPSTR pszObjId = *(LPSTR *)pvStructInfo;
1282
1283 *pszObjId = 0;
1284 sprintf(pszObjId, "%d.%d", pbEncoded[1 + lenBytes] / 40,
1285 pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] /
1286 40) * 40);
1287 pszObjId += strlen(pszObjId);
1288 for (ptr = pbEncoded + 2 + lenBytes; ret &&
1289 ptr - pbEncoded - 1 - lenBytes < dataLen; )
1290 {
1291 int val = 0;
1292
1293 while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1294 (*ptr & 0x80))
1295 {
1296 val <<= 7;
1297 val |= *ptr & 0x7f;
1298 ptr++;
1299 }
1300 val <<= 7;
1301 val |= *ptr++;
1302 sprintf(pszObjId, ".%d", val);
1303 pszObjId += strlen(pszObjId);
1304 }
1305 }
1306 else
1307 *(LPSTR *)pvStructInfo = NULL;
1308 *pcbStructInfo = bytesNeeded;
1309 }
1310 }
1311 return ret;
1312}
1313
1314static BOOL CRYPT_AsnDecodeOidInternal(const BYTE *pbEncoded, DWORD cbEncoded,
1315 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1316{
1317 BOOL ret;
1318
1319 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1320 pvStructInfo, *pcbStructInfo);
1321
1322 if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
1323 ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, dwFlags,
1324 pvStructInfo, pcbStructInfo, pcbDecoded);
1325 else
1326 {
1327 SetLastError(CRYPT_E_ASN1_BADTAG);
1328 ret = FALSE;
1329 }
1330 return ret;
1331}
1332
1333/* Warning: assumes pvStructInfo is a CERT_EXTENSION whose pszObjId is set
1334 * ahead of time!
1335 */
1336static BOOL CRYPT_AsnDecodeExtension(const BYTE *pbEncoded, DWORD cbEncoded,
1337 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1338{
1339 struct AsnDecodeSequenceItem items[] = {
1340 { ASN_OBJECTIDENTIFIER, offsetof(CERT_EXTENSION, pszObjId),
1341 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
1342 offsetof(CERT_EXTENSION, pszObjId), 0 },
1343 { ASN_BOOL, offsetof(CERT_EXTENSION, fCritical), CRYPT_AsnDecodeBool,
1344 sizeof(BOOL), TRUE, FALSE, 0, 0 },
1345 { ASN_OCTETSTRING, offsetof(CERT_EXTENSION, Value),
1346 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_OBJID_BLOB), FALSE, TRUE,
1347 offsetof(CERT_EXTENSION, Value.pbData) },
1348 };
1349 BOOL ret = TRUE;
1350 PCERT_EXTENSION ext = (PCERT_EXTENSION)pvStructInfo;
1351
1352 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags, ext,
1353 *pcbStructInfo);
1354
1355 if (ext)
1356 TRACE("ext->pszObjId is %p\n", ext->pszObjId);
1357 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
1358 pbEncoded, cbEncoded, dwFlags, NULL, ext, pcbStructInfo,
1359 pcbDecoded, ext ? ext->pszObjId : NULL);
1360 if (ext)
1361 TRACE("ext->pszObjId is %p (%s)\n", ext->pszObjId,
1362 debugstr_a(ext->pszObjId));
1363 TRACE("returning %d (%08x)\n", ret, GetLastError());
1364 return ret;
1365}
1366
1367static BOOL CRYPT_AsnDecodeExtensionsInternal(const BYTE *pbEncoded,
1368 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
1369 DWORD *pcbDecoded)
1370{
1371 BOOL ret = TRUE;
1372 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1373 CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
1374 offsetof(CERT_EXTENSION, pszObjId) };
1375 PCERT_EXTENSIONS exts = (PCERT_EXTENSIONS)pvStructInfo;
1376
1377 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
1378 pvStructInfo, *pcbStructInfo, pcbDecoded);
1379
1380 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1381 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
1382 exts ? exts->rgExtension : NULL);
1383 return ret;
1384}
1385
1386static BOOL WINAPI CRYPT_AsnDecodeExtensions(DWORD dwCertEncodingType,
1387 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1388 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1389{
1390 BOOL ret = TRUE;
1391
1392 __TRY
1393 {
1394 ret = CRYPT_AsnDecodeExtensionsInternal(pbEncoded, cbEncoded,
1395 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
1396 if (ret && pvStructInfo)
1397 {
1398 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1399 pcbStructInfo, *pcbStructInfo);
1400 if (ret)
1401 {
1402 CERT_EXTENSIONS *exts;
1403
1404 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1405 pvStructInfo = *(BYTE **)pvStructInfo;
1406 exts = (CERT_EXTENSIONS *)pvStructInfo;
1407 exts->rgExtension = (CERT_EXTENSION *)((BYTE *)exts +
1408 sizeof(CERT_EXTENSIONS));
1409 ret = CRYPT_AsnDecodeExtensionsInternal(pbEncoded, cbEncoded,
1410 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
1411 pcbStructInfo, NULL);
1412 }
1413 }
1414 }
1415 __EXCEPT(1)
1416 {
1417 SetLastError(STATUS_ACCESS_VIOLATION);
1418 ret = FALSE;
1419 }
1420 __ENDTRY
1421 return ret;
1422}
1423
1424/* Warning: this assumes the address of value->Value.pbData is already set, in
1425 * order to avoid overwriting memory. (In some cases, it may change it, if it
1426 * doesn't copy anything to memory.) Be sure to set it correctly!
1427 */
1428static BOOL CRYPT_AsnDecodeNameValueInternal(const BYTE *pbEncoded,
1429 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
1430 DWORD *pcbDecoded)
1431{
1432 BOOL ret = TRUE;
1433 DWORD dataLen;
1434 CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
1435
1436 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1437 {
1438 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1439 DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
1440
1441 switch (pbEncoded[0])
1442 {
1443 case ASN_OCTETSTRING:
1444 valueType = CERT_RDN_OCTET_STRING;
1445 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1446 bytesNeeded += dataLen;
1447 break;
1448 case ASN_NUMERICSTRING:
1449 valueType = CERT_RDN_NUMERIC_STRING;
1450 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1451 bytesNeeded += dataLen;
1452 break;
1453 case ASN_PRINTABLESTRING:
1454 valueType = CERT_RDN_PRINTABLE_STRING;
1455 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1456 bytesNeeded += dataLen;
1457 break;
1458 case ASN_IA5STRING:
1459 valueType = CERT_RDN_IA5_STRING;
1460 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1461 bytesNeeded += dataLen;
1462 break;
1463 case ASN_T61STRING:
1464 valueType = CERT_RDN_T61_STRING;
1465 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1466 bytesNeeded += dataLen;
1467 break;
1468 case ASN_VIDEOTEXSTRING:
1469 valueType = CERT_RDN_VIDEOTEX_STRING;
1470 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1471 bytesNeeded += dataLen;
1472 break;
1473 case ASN_GRAPHICSTRING:
1474 valueType = CERT_RDN_GRAPHIC_STRING;
1475 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1476 bytesNeeded += dataLen;
1477 break;
1478 case ASN_VISIBLESTRING:
1479 valueType = CERT_RDN_VISIBLE_STRING;
1480 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1481 bytesNeeded += dataLen;
1482 break;
1483 case ASN_GENERALSTRING:
1484 valueType = CERT_RDN_GENERAL_STRING;
1485 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1486 bytesNeeded += dataLen;
1487 break;
1488 case ASN_UNIVERSALSTRING:
1489 FIXME("ASN_UNIVERSALSTRING: unimplemented\n");
1490 SetLastError(CRYPT_E_ASN1_BADTAG);
1491 return FALSE;
1492 case ASN_BMPSTRING:
1493 valueType = CERT_RDN_BMP_STRING;
1494 bytesNeeded += dataLen;
1495 break;
1496 case ASN_UTF8STRING:
1497 valueType = CERT_RDN_UTF8_STRING;
1498 bytesNeeded += MultiByteToWideChar(CP_UTF8, 0,
1499 (LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) * 2;
1500 break;
1501 default:
1502 SetLastError(CRYPT_E_ASN1_BADTAG);
1503 return FALSE;
1504 }
1505
1506 if (pcbDecoded)
1507 *pcbDecoded = 1 + lenBytes + dataLen;
1508 if (!value)
1509 *pcbStructInfo = bytesNeeded;
1510 else if (*pcbStructInfo < bytesNeeded)
1511 {
1512 *pcbStructInfo = bytesNeeded;
1513 SetLastError(ERROR_MORE_DATA);
1514 ret = FALSE;
1515 }
1516 else
1517 {
1518 *pcbStructInfo = bytesNeeded;
1519 value->dwValueType = valueType;
1520 if (dataLen)
1521 {
1522 DWORD i;
1523
1524 assert(value->Value.pbData);
1525 switch (pbEncoded[0])
1526 {
1527 case ASN_OCTETSTRING:
1528 case ASN_NUMERICSTRING:
1529 case ASN_PRINTABLESTRING:
1530 case ASN_IA5STRING:
1531 case ASN_T61STRING:
1532 case ASN_VIDEOTEXSTRING:
1533 case ASN_GRAPHICSTRING:
1534 case ASN_VISIBLESTRING:
1535 case ASN_GENERALSTRING:
1536 value->Value.cbData = dataLen;
1537 if (dataLen)
1538 {
1539 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1540 memcpy(value->Value.pbData,
1541 pbEncoded + 1 + lenBytes, dataLen);
1542 else
1543 value->Value.pbData = (LPBYTE)pbEncoded + 1 +
1544 lenBytes;
1545 }
1546 break;
1547 case ASN_BMPSTRING:
1548 {
1549 LPWSTR str = (LPWSTR)value->Value.pbData;
1550
1551 value->Value.cbData = dataLen;
1552 for (i = 0; i < dataLen / 2; i++)
1553 str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
1554 pbEncoded[1 + lenBytes + 2 * i + 1];
1555 break;
1556 }
1557 case ASN_UTF8STRING:
1558 {
1559 LPWSTR str = (LPWSTR)value->Value.pbData;
1560
1561 value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
1562 (LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
1563 str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
1564 break;
1565 }
1566 }
1567 }
1568 else
1569 {
1570 value->Value.cbData = 0;
1571 value->Value.pbData = NULL;
1572 }
1573 }
1574 }
1575 return ret;
1576}
1577
1578static BOOL WINAPI CRYPT_AsnDecodeNameValue(DWORD dwCertEncodingType,
1579 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1580 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1581{
1582 BOOL ret = TRUE;
1583
1584 __TRY
1585 {
1586 ret = CRYPT_AsnDecodeNameValueInternal(pbEncoded, cbEncoded,
1587 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
1588 if (ret && pvStructInfo)
1589 {
1590 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1591 pcbStructInfo, *pcbStructInfo);
1592 if (ret)
1593 {
1594 CERT_NAME_VALUE *value;
1595
1596 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1597 pvStructInfo = *(BYTE **)pvStructInfo;
1598 value = (CERT_NAME_VALUE *)pvStructInfo;
1599 value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
1600 ret = CRYPT_AsnDecodeNameValueInternal( pbEncoded, cbEncoded,
1601 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
1602 pcbStructInfo, NULL);
1603 }
1604 }
1605 }
1606 __EXCEPT(1)
1607 {
1608 SetLastError(STATUS_ACCESS_VIOLATION);
1609 ret = FALSE;
1610 }
1611 __ENDTRY
1612 return ret;
1613}
1614
1615static BOOL CRYPT_AsnDecodeUnicodeNameValueInternal(const BYTE *pbEncoded,
1616 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
1617 DWORD *pcbDecoded)
1618{
1619 BOOL ret = TRUE;
1620 DWORD dataLen;
1621 CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
1622
1623 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1624 {
1625 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1626 DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
1627
1628 switch (pbEncoded[0])
1629 {
1630 case ASN_NUMERICSTRING:
1631 valueType = CERT_RDN_NUMERIC_STRING;
1632 if (dataLen)
1633 bytesNeeded += (dataLen + 1) * 2;
1634 break;
1635 case ASN_PRINTABLESTRING:
1636 valueType = CERT_RDN_PRINTABLE_STRING;
1637 if (dataLen)
1638 bytesNeeded += (dataLen + 1) * 2;
1639 break;
1640 case ASN_IA5STRING:
1641 valueType = CERT_RDN_IA5_STRING;
1642 if (dataLen)
1643 bytesNeeded += (dataLen + 1) * 2;
1644 break;
1645 case ASN_T61STRING:
1646 valueType = CERT_RDN_T61_STRING;
1647 if (dataLen)
1648 bytesNeeded += (dataLen + 1) * 2;
1649 break;
1650 case ASN_VIDEOTEXSTRING:
1651 valueType = CERT_RDN_VIDEOTEX_STRING;
1652 if (dataLen)
1653 bytesNeeded += (dataLen + 1) * 2;
1654 break;
1655 case ASN_GRAPHICSTRING:
1656 valueType = CERT_RDN_GRAPHIC_STRING;
1657 if (dataLen)
1658 bytesNeeded += (dataLen + 1) * 2;
1659 break;
1660 case ASN_VISIBLESTRING:
1661 valueType = CERT_RDN_VISIBLE_STRING;
1662 if (dataLen)
1663 bytesNeeded += (dataLen + 1) * 2;
1664 break;
1665 case ASN_GENERALSTRING:
1666 valueType = CERT_RDN_GENERAL_STRING;
1667 if (dataLen)
1668 bytesNeeded += (dataLen + 1) * 2;
1669 break;
1670 case ASN_UNIVERSALSTRING:
1671 valueType = CERT_RDN_UNIVERSAL_STRING;
1672 if (dataLen)
1673 bytesNeeded += dataLen / 2 + sizeof(WCHAR);
1674 break;
1675 case ASN_BMPSTRING:
1676 valueType = CERT_RDN_BMP_STRING;
1677 if (dataLen)
1678 bytesNeeded += dataLen + sizeof(WCHAR);
1679 break;
1680 case ASN_UTF8STRING:
1681 valueType = CERT_RDN_UTF8_STRING;
1682 if (dataLen)
1683 bytesNeeded += (MultiByteToWideChar(CP_UTF8, 0,
1684 (LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) + 1) * 2;
1685 break;
1686 default:
1687 SetLastError(CRYPT_E_ASN1_BADTAG);
1688 return FALSE;
1689 }
1690
1691 if (pcbDecoded)
1692 *pcbDecoded = 1 + lenBytes + dataLen;
1693 if (!value)
1694 *pcbStructInfo = bytesNeeded;
1695 else if (*pcbStructInfo < bytesNeeded)
1696 {
1697 *pcbStructInfo = bytesNeeded;
1698 SetLastError(ERROR_MORE_DATA);
1699 ret = FALSE;
1700 }
1701 else
1702 {
1703 *pcbStructInfo = bytesNeeded;
1704 value->dwValueType = valueType;
1705 if (dataLen)
1706 {
1707 DWORD i;
1708 LPWSTR str = (LPWSTR)value->Value.pbData;
1709
1710 assert(value->Value.pbData);
1711 switch (pbEncoded[0])
1712 {
1713 case ASN_NUMERICSTRING:
1714 case ASN_PRINTABLESTRING:
1715 case ASN_IA5STRING:
1716 case ASN_T61STRING:
1717 case ASN_VIDEOTEXSTRING:
1718 case ASN_GRAPHICSTRING:
1719 case ASN_VISIBLESTRING:
1720 case ASN_GENERALSTRING:
1721 value->Value.cbData = dataLen * 2;
1722 for (i = 0; i < dataLen; i++)
1723 str[i] = pbEncoded[1 + lenBytes + i];
1724 str[i] = 0;
1725 break;
1726 case ASN_UNIVERSALSTRING:
1727 value->Value.cbData = dataLen / 2;
1728 for (i = 0; i < dataLen / 4; i++)
1729 str[i] = (pbEncoded[1 + lenBytes + 2 * i + 2] << 8)
1730 | pbEncoded[1 + lenBytes + 2 * i + 3];
1731 str[i] = 0;
1732 break;
1733 case ASN_BMPSTRING:
1734 value->Value.cbData = dataLen;
1735 for (i = 0; i < dataLen / 2; i++)
1736 str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
1737 pbEncoded[1 + lenBytes + 2 * i + 1];
1738 str[i] = 0;
1739 break;
1740 case ASN_UTF8STRING:
1741 value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
1742 (LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
1743 str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
1744 value->Value.pbData[value->Value.cbData / sizeof(WCHAR)]
1745 = 0;
1746 value->Value.cbData += sizeof(WCHAR);
1747 break;
1748 }
1749 }
1750 else
1751 {
1752 value->Value.cbData = 0;
1753 value->Value.pbData = NULL;
1754 }
1755 }
1756 }
1757 return ret;
1758}
1759
1760static BOOL WINAPI CRYPT_AsnDecodeUnicodeNameValue(DWORD dwCertEncodingType,
1761 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1762 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1763{
1764 BOOL ret = TRUE;
1765
1766 __TRY
1767 {
1768 ret = CRYPT_AsnDecodeUnicodeNameValueInternal(pbEncoded, cbEncoded,
1769 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
1770 if (ret && pvStructInfo)
1771 {
1772 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1773 pcbStructInfo, *pcbStructInfo);
1774 if (ret)
1775 {
1776 CERT_NAME_VALUE *value;
1777
1778 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1779 pvStructInfo = *(BYTE **)pvStructInfo;
1780 value = (CERT_NAME_VALUE *)pvStructInfo;
1781 value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
1782 ret = CRYPT_AsnDecodeUnicodeNameValueInternal(pbEncoded,
1783 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
1784 pcbStructInfo, NULL);
1785 }
1786 }
1787 }
1788 __EXCEPT(1)
1789 {
1790 SetLastError(STATUS_ACCESS_VIOLATION);
1791 ret = FALSE;
1792 }
1793 __ENDTRY
1794 return ret;
1795}
1796
1797static BOOL CRYPT_AsnDecodeRdnAttr(const BYTE *pbEncoded, DWORD cbEncoded,
1798 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1799{
1800 BOOL ret;
1801 struct AsnDecodeSequenceItem items[] = {
1802 { ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
1803 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
1804 offsetof(CERT_RDN_ATTR, pszObjId), 0 },
1805 { 0, offsetof(CERT_RDN_ATTR, dwValueType),
1806 CRYPT_AsnDecodeNameValueInternal, sizeof(CERT_NAME_VALUE),
1807 FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
1808 };
1809 CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
1810
1811 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1812 pvStructInfo, *pcbStructInfo);
1813
1814 if (attr)
1815 TRACE("attr->pszObjId is %p\n", attr->pszObjId);
1816 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
1817 pbEncoded, cbEncoded, dwFlags, NULL, attr, pcbStructInfo, pcbDecoded,
1818 attr ? attr->pszObjId : NULL);
1819 if (attr)
1820 {
1821 TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
1822 debugstr_a(attr->pszObjId));
1823 TRACE("attr->dwValueType is %d\n", attr->dwValueType);
1824 }
1825 TRACE("returning %d (%08x)\n", ret, GetLastError());
1826 return ret;
1827}
1828
1829static BOOL CRYPT_AsnDecodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
1830 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1831{
1832 BOOL ret = TRUE;
1833 struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
1834 CRYPT_AsnDecodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
1835 offsetof(CERT_RDN_ATTR, pszObjId) };
1836 PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
1837
1838 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1839 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
1840 rdn ? rdn->rgRDNAttr : NULL);
1841 return ret;
1842}
1843
1844static BOOL WINAPI CRYPT_AsnDecodeName(DWORD dwCertEncodingType,
1845 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1846 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1847{
1848 BOOL ret = TRUE;
1849
1850 __TRY
1851 {
1852 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1853 CRYPT_AsnDecodeRdn, sizeof(CERT_RDN), TRUE,
1854 offsetof(CERT_RDN, rgRDNAttr) };
1855
1856 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1857 pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
1858 }
1859 __EXCEPT(1)
1860 {
1861 SetLastError(STATUS_ACCESS_VIOLATION);
1862 ret = FALSE;
1863 }
1864 __ENDTRY
1865 return ret;
1866}
1867
1868static BOOL CRYPT_AsnDecodeUnicodeRdnAttr(const BYTE *pbEncoded,
1869 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
1870 DWORD *pcbDecoded)
1871{
1872 BOOL ret;
1873 struct AsnDecodeSequenceItem items[] = {
1874 { ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
1875 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
1876 offsetof(CERT_RDN_ATTR, pszObjId), 0 },
1877 { 0, offsetof(CERT_RDN_ATTR, dwValueType),
1878 CRYPT_AsnDecodeUnicodeNameValueInternal, sizeof(CERT_NAME_VALUE),
1879 FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
1880 };
1881 CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
1882
1883 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1884 pvStructInfo, *pcbStructInfo);
1885
1886 if (attr)
1887 TRACE("attr->pszObjId is %p\n", attr->pszObjId);
1888 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
1889 pbEncoded, cbEncoded, dwFlags, NULL, attr, pcbStructInfo, pcbDecoded,
1890 attr ? attr->pszObjId : NULL);
1891 if (attr)
1892 {
1893 TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
1894 debugstr_a(attr->pszObjId));
1895 TRACE("attr->dwValueType is %d\n", attr->dwValueType);
1896 }
1897 TRACE("returning %d (%08x)\n", ret, GetLastError());
1898 return ret;
1899}
1900
1901static BOOL CRYPT_AsnDecodeUnicodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
1902 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
1903{
1904 BOOL ret = TRUE;
1905 struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
1906 CRYPT_AsnDecodeUnicodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
1907 offsetof(CERT_RDN_ATTR, pszObjId) };
1908 PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
1909
1910 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1911 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
1912 rdn ? rdn->rgRDNAttr : NULL);
1913 return ret;
1914}
1915
1916static BOOL WINAPI CRYPT_AsnDecodeUnicodeName(DWORD dwCertEncodingType,
1917 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1918 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1919{
1920 BOOL ret = TRUE;
1921
1922 __TRY
1923 {
1924 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1925 CRYPT_AsnDecodeUnicodeRdn, sizeof(CERT_RDN), TRUE,
1926 offsetof(CERT_RDN, rgRDNAttr) };
1927
1928 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1929 pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
1930 }
1931 __EXCEPT(1)
1932 {
1933 SetLastError(STATUS_ACCESS_VIOLATION);
1934 ret = FALSE;
1935 }
1936 __ENDTRY
1937 return ret;
1938}
1939
1940static BOOL CRYPT_FindEncodedLen(const BYTE *pbEncoded, DWORD cbEncoded,
1941 DWORD *pcbDecoded)
1942{
1943 BOOL ret = TRUE, done = FALSE;
1944 DWORD indefiniteNestingLevels = 0, decoded = 0;
1945
1946 TRACE("(%p, %d)\n", pbEncoded, cbEncoded);
1947
1948 do {
1949 DWORD dataLen;
1950
1951 if (!cbEncoded)
1952 done = TRUE;
1953 else if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded,
1954 &dataLen)))
1955 {
1956 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1957
1958 if (dataLen == CMSG_INDEFINITE_LENGTH)
1959 {
1960 indefiniteNestingLevels++;
1961 pbEncoded += 1 + lenBytes;
1962 cbEncoded -= 1 + lenBytes;
1963 decoded += 1 + lenBytes;
1964 TRACE("indefiniteNestingLevels = %d\n",
1965 indefiniteNestingLevels);
1966 }
1967 else
1968 {
1969 if (pbEncoded[0] == 0 && pbEncoded[1] == 0 &&
1970 indefiniteNestingLevels)
1971 {
1972 indefiniteNestingLevels--;
1973 TRACE("indefiniteNestingLevels = %d\n",
1974 indefiniteNestingLevels);
1975 }
1976 pbEncoded += 1 + lenBytes + dataLen;
1977 cbEncoded -= 1 + lenBytes + dataLen;
1978 decoded += 1 + lenBytes + dataLen;
1979 if (!indefiniteNestingLevels)
1980 done = TRUE;
1981 }
1982 }
1983 } while (ret && !done);
1984 /* If we haven't found all 0 TLVs, we haven't found the end */
1985 if (ret && indefiniteNestingLevels)
1986 {
1987 SetLastError(CRYPT_E_ASN1_EOD);
1988 ret = FALSE;
1989 }
1990 if (ret)
1991 *pcbDecoded = decoded;
1992 TRACE("returning %d (%d)\n", ret, ret ? *pcbDecoded : 0);
1993 return ret;
1994}
1995
1996static BOOL CRYPT_AsnDecodeCopyBytes(const BYTE *pbEncoded,
1997 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
1998 DWORD *pcbDecoded)
1999{
2000 BOOL ret = TRUE;
2001 DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB), encodedLen = 0;
2002
2003 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2004 pvStructInfo, *pcbStructInfo);
2005
2006 if ((ret = CRYPT_FindEncodedLen(pbEncoded, cbEncoded, &encodedLen)))
2007 {
2008 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
2009 bytesNeeded += encodedLen;
2010 if (!pvStructInfo)
2011 *pcbStructInfo = bytesNeeded;
2012 else if (*pcbStructInfo < bytesNeeded)
2013 {
2014 SetLastError(ERROR_MORE_DATA);
2015 *pcbStructInfo = bytesNeeded;
2016 ret = FALSE;
2017 }
2018 else
2019 {
2020 PCRYPT_OBJID_BLOB blob = (PCRYPT_OBJID_BLOB)pvStructInfo;
2021
2022 *pcbStructInfo = bytesNeeded;
2023 blob->cbData = encodedLen;
2024 if (encodedLen)
2025 {
2026 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2027 blob->pbData = (LPBYTE)pbEncoded;
2028 else
2029 {
2030 assert(blob->pbData);
2031 memcpy(blob->pbData, pbEncoded, blob->cbData);
2032 }
2033 }
2034 else
2035 blob->pbData = NULL;
2036 }
2037 if (pcbDecoded)
2038 *pcbDecoded = encodedLen;
2039 }
2040 return ret;
2041}
2042
2043static BOOL CRYPT_DecodeDERArray(const BYTE *pbEncoded, DWORD cbEncoded,
2044 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2045{
2046 BOOL ret;
2047 struct AsnArrayDescriptor arrayDesc = { 0, CRYPT_AsnDecodeCopyBytes,
2048 sizeof(CRYPT_DER_BLOB), TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
2049 struct GenericArray *array = (struct GenericArray *)pvStructInfo;
2050
2051 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
2052 pvStructInfo, *pcbStructInfo, pcbDecoded);
2053
2054 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2055 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
2056 array ? array->rgItems : NULL);
2057 return ret;
2058}
2059
2060static BOOL CRYPT_AsnDecodeCTLUsage(const BYTE *pbEncoded, DWORD cbEncoded,
2061 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2062{
2063 BOOL ret;
2064 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2065 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
2066 CTL_USAGE *usage = (CTL_USAGE *)pvStructInfo;
2067
2068 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2069 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
2070 usage ? usage->rgpszUsageIdentifier : NULL);
2071 return ret;
2072}
2073
2074static BOOL CRYPT_AsnDecodeCTLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
2075 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2076{
2077 struct AsnDecodeSequenceItem items[] = {
2078 { ASN_OCTETSTRING, offsetof(CTL_ENTRY, SubjectIdentifier),
2079 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DATA_BLOB), FALSE, TRUE,
2080 offsetof(CTL_ENTRY, SubjectIdentifier.pbData), 0 },
2081 { ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CTL_ENTRY, cAttribute),
2082 CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES), FALSE,
2083 TRUE, offsetof(CTL_ENTRY, rgAttribute), 0 },
2084 };
2085 BOOL ret = TRUE;
2086 CTL_ENTRY *entry = (CTL_ENTRY *)pvStructInfo;
2087
2088 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags, entry,
2089 *pcbStructInfo);
2090
2091 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2092 pbEncoded, cbEncoded, dwFlags, NULL, entry, pcbStructInfo,
2093 pcbDecoded, entry ? entry->SubjectIdentifier.pbData : NULL);
2094 return ret;
2095}
2096
2097static BOOL CRYPT_AsnDecodeCTLEntries(const BYTE *pbEncoded, DWORD cbEncoded,
2098 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2099{
2100 BOOL ret;
2101 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2102 CRYPT_AsnDecodeCTLEntry, sizeof(CTL_ENTRY), TRUE,
2103 offsetof(CTL_ENTRY, SubjectIdentifier.pbData) };
2104 struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
2105
2106 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
2107 pvStructInfo, *pcbStructInfo, pcbDecoded);
2108
2109 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2110 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
2111 entries ? entries->rgItems : NULL);
2112 return ret;
2113}
2114
2115static BOOL WINAPI CRYPT_AsnDecodeCTL(DWORD dwCertEncodingType,
2116 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2117 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2118{
2119 BOOL ret = FALSE;
2120
2121 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2122 pDecodePara, pvStructInfo, *pcbStructInfo);
2123
2124 __TRY
2125 {
2126 struct AsnDecodeSequenceItem items[] = {
2127 { ASN_INTEGER, offsetof(CTL_INFO, dwVersion),
2128 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
2129 { ASN_SEQUENCEOF, offsetof(CTL_INFO, SubjectUsage),
2130 CRYPT_AsnDecodeCTLUsage, sizeof(CTL_USAGE), FALSE, TRUE,
2131 offsetof(CTL_INFO, SubjectUsage.rgpszUsageIdentifier), 0 },
2132 { ASN_OCTETSTRING, offsetof(CTL_INFO, ListIdentifier),
2133 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DATA_BLOB), TRUE,
2134 TRUE, offsetof(CTL_INFO, ListIdentifier.pbData), 0 },
2135 { ASN_INTEGER, offsetof(CTL_INFO, SequenceNumber),
2136 CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
2137 TRUE, TRUE, offsetof(CTL_INFO, SequenceNumber.pbData), 0 },
2138 { 0, offsetof(CTL_INFO, ThisUpdate),
2139 CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE,
2140 0 },
2141 { 0, offsetof(CTL_INFO, NextUpdate),
2142 CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), TRUE, FALSE,
2143 0 },
2144 { ASN_SEQUENCEOF, offsetof(CTL_INFO, SubjectAlgorithm),
2145 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
2146 FALSE, TRUE, offsetof(CTL_INFO, SubjectAlgorithm.pszObjId), 0 },
2147 { ASN_SEQUENCEOF, offsetof(CTL_INFO, cCTLEntry),
2148 CRYPT_AsnDecodeCTLEntries, sizeof(struct GenericArray),
2149 TRUE, TRUE, offsetof(CTL_INFO, rgCTLEntry), 0 },
2150 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CTL_INFO, cExtension),
2151 CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
2152 offsetof(CTL_INFO, rgExtension), 0 },
2153 };
2154
2155 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2156 pDecodePara, pvStructInfo, *pcbStructInfo);
2157
2158 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2159 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
2160 pcbStructInfo, NULL, NULL);
2161 }
2162 __EXCEPT(1)
2163 {
2164 SetLastError(STATUS_ACCESS_VIOLATION);
2165 }
2166 __ENDTRY
2167 return ret;
2168}
2169
2170static BOOL CRYPT_AsnDecodeSMIMECapability(const BYTE *pbEncoded,
2171 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2172 DWORD *pcbDecoded)
2173{
2174 BOOL ret;
2175 struct AsnDecodeSequenceItem items[] = {
2176 { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_SMIME_CAPABILITY, pszObjId),
2177 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
2178 offsetof(CRYPT_SMIME_CAPABILITY, pszObjId), 0 },
2179 { 0, offsetof(CRYPT_SMIME_CAPABILITY, Parameters),
2180 CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
2181 offsetof(CRYPT_SMIME_CAPABILITY, Parameters.pbData), 0 },
2182 };
2183 PCRYPT_SMIME_CAPABILITY capability = (PCRYPT_SMIME_CAPABILITY)pvStructInfo;
2184
2185 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2186 pvStructInfo, *pcbStructInfo);
2187
2188 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2189 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
2190 pcbDecoded, capability ? capability->pszObjId : NULL);
2191 TRACE("returning %d\n", ret);
2192 return ret;
2193}
2194
2195static BOOL CRYPT_AsnDecodeSMIMECapabilitiesInternal(const BYTE *pbEncoded,
2196 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2197 DWORD *pcbDecoded)
2198{
2199 struct AsnArrayDescriptor arrayDesc = { 0,
2200 CRYPT_AsnDecodeSMIMECapability, sizeof(CRYPT_SMIME_CAPABILITY), TRUE,
2201 offsetof(CRYPT_SMIME_CAPABILITY, pszObjId) };
2202 PCRYPT_SMIME_CAPABILITIES capabilities =
2203 (PCRYPT_SMIME_CAPABILITIES)pvStructInfo;
2204 BOOL ret;
2205
2206 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2207 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
2208 capabilities ? capabilities->rgCapability : NULL);
2209 return ret;
2210}
2211
2212static BOOL WINAPI CRYPT_AsnDecodeSMIMECapabilities(DWORD dwCertEncodingType,
2213 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2214 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2215{
2216 BOOL ret = FALSE;
2217
2218 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2219 pDecodePara, pvStructInfo, *pcbStructInfo);
2220
2221 __TRY
2222 {
2223 DWORD bytesNeeded;
2224
2225 if (!cbEncoded)
2226 SetLastError(CRYPT_E_ASN1_EOD);
2227 else if (pbEncoded[0] != ASN_SEQUENCEOF)
2228 SetLastError(CRYPT_E_ASN1_CORRUPT);
2229 else if ((ret = CRYPT_AsnDecodeSMIMECapabilitiesInternal(pbEncoded,
2230 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded,
2231 NULL)))
2232 {
2233 if (!pvStructInfo)
2234 *pcbStructInfo = bytesNeeded;
2235 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2236 pvStructInfo, pcbStructInfo, bytesNeeded)))
2237 {
2238 PCRYPT_SMIME_CAPABILITIES capabilities;
2239
2240 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2241 pvStructInfo = *(BYTE **)pvStructInfo;
2242 capabilities = (PCRYPT_SMIME_CAPABILITIES)pvStructInfo;
2243 capabilities->rgCapability =
2244 (PCRYPT_SMIME_CAPABILITY)((BYTE *)pvStructInfo +
2245 sizeof(CRYPT_SMIME_CAPABILITIES));
2246 ret = CRYPT_AsnDecodeSMIMECapabilitiesInternal(pbEncoded,
2247 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
2248 &bytesNeeded, NULL);
2249 }
2250 }
2251 }
2252 __EXCEPT(1)
2253 {
2254 SetLastError(STATUS_ACCESS_VIOLATION);
2255 }
2256 __ENDTRY
2257 TRACE("returning %d\n", ret);
2258 return ret;
2259}
2260
2261static BOOL CRYPT_AsnDecodeIA5String(const BYTE *pbEncoded,
2262 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2263 DWORD *pcbDecoded)
2264{
2265 BOOL ret = TRUE;
2266 DWORD dataLen;
2267 LPSTR *pStr = pvStructInfo;
2268
2269 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2270 {
2271 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2272 DWORD bytesNeeded = sizeof(LPSTR) + sizeof(char);
2273
2274 if (pbEncoded[0] != ASN_IA5STRING)
2275 {
2276 SetLastError(CRYPT_E_ASN1_CORRUPT);
2277 ret = FALSE;
2278 }
2279 else
2280 {
2281 bytesNeeded += dataLen;
2282 if (pcbDecoded)
2283 *pcbDecoded = 1 + lenBytes + dataLen;
2284 if (!pvStructInfo)
2285 *pcbStructInfo = bytesNeeded;
2286 else if (*pcbStructInfo < bytesNeeded)
2287 {
2288 *pcbStructInfo = bytesNeeded;
2289 SetLastError(ERROR_MORE_DATA);
2290 ret = FALSE;
2291 }
2292 else
2293 {
2294 *pcbStructInfo = bytesNeeded;
2295 if (dataLen)
2296 {
2297 LPSTR str = *pStr;
2298
2299 assert(str);
2300 memcpy(str, pbEncoded + 1 + lenBytes, dataLen);
2301 str[dataLen] = 0;
2302 }
2303 else
2304 *pStr = NULL;
2305 }
2306 }
2307 }
2308 return ret;
2309}
2310
2311static BOOL CRYPT_AsnDecodeIntArray(const BYTE *pbEncoded,
2312 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2313 DWORD *pcbDecoded)
2314{
2315 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2316 CRYPT_AsnDecodeIntInternal, sizeof(int), FALSE, 0 };
2317 struct GenericArray *array = pvStructInfo;
2318 BOOL ret;
2319
2320 TRACE("(%p, %d, %08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
2321 pvStructInfo, pvStructInfo ? *pcbDecoded : 0);
2322
2323 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2324 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
2325 array ? array->rgItems : NULL);
2326 TRACE("returning %d\n", ret);
2327 return ret;
2328}
2329
2330static BOOL CRYPT_AsnDecodeNoticeReference(const BYTE *pbEncoded,
2331 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2332 DWORD *pcbDecoded)
2333{
2334 BOOL ret;
2335 struct AsnDecodeSequenceItem items[] = {
2336 { ASN_IA5STRING, offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE,
2337 pszOrganization), CRYPT_AsnDecodeIA5String, sizeof(LPSTR), FALSE, TRUE,
2338 offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, pszOrganization), 0 },
2339 { ASN_SEQUENCEOF, offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE,
2340 cNoticeNumbers), CRYPT_AsnDecodeIntArray, sizeof(struct GenericArray),
2341 FALSE, TRUE, offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE,
2342 rgNoticeNumbers), 0 },
2343 };
2344 DWORD bytesNeeded;
2345
2346 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2347 pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
2348
2349 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2350 pbEncoded, cbEncoded, dwFlags, NULL, NULL, &bytesNeeded, pcbDecoded,
2351 NULL);
2352 if (ret)
2353 {
2354 /* The caller is expecting a pointer to a
2355 * CERT_POLICY_QUALIFIER_NOTICE_REFERENCE to be decoded, whereas
2356 * CRYPT_AsnDecodeSequence is decoding a
2357 * CERT_POLICY_QUALIFIER_NOTICE_REFERENCE. Increment the bytes
2358 * needed, and decode again if the requisite space is available.
2359 */
2360 bytesNeeded += sizeof(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE);
2361 if (!pvStructInfo)
2362 *pcbStructInfo = bytesNeeded;
2363 else if (*pcbStructInfo < bytesNeeded)
2364 {
2365 *pcbStructInfo = bytesNeeded;
2366 SetLastError(ERROR_MORE_DATA);
2367 ret = FALSE;
2368 }
2369 else
2370 {
2371 PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE noticeRef;
2372
2373 *pcbStructInfo = bytesNeeded;
2374 /* The pointer (pvStructInfo) passed in points to the first dynamic
2375 * pointer, so use it as the pointer to the
2376 * CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, and create the
2377 * appropriate offset for the first dynamic pointer within the
2378 * notice reference by pointing to the first memory location past
2379 * the CERT_POLICY_QUALIFIER_NOTICE_REFERENCE.
2380 */
2381 noticeRef =
2382 *(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE *)pvStructInfo;
2383 noticeRef->pszOrganization = (LPSTR)((LPBYTE)noticeRef +
2384 sizeof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE));
2385 ret = CRYPT_AsnDecodeSequence(items,
2386 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2387 NULL, noticeRef, &bytesNeeded, pcbDecoded,
2388 noticeRef->pszOrganization);
2389 }
2390 }
2391 TRACE("returning %d\n", ret);
2392 return ret;
2393}
2394
2395static BOOL CRYPT_AsnDecodeUnicodeString(const BYTE *pbEncoded,
2396 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2397 DWORD *pcbDecoded)
2398{
2399 BOOL ret = TRUE;
2400 DWORD dataLen;
2401
2402 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2403 {
2404 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2405 DWORD bytesNeeded = sizeof(LPWSTR);
2406
2407 switch (pbEncoded[0])
2408 {
2409 case ASN_NUMERICSTRING:
2410 if (dataLen)
2411 bytesNeeded += (dataLen + 1) * 2;
2412 break;
2413 case ASN_PRINTABLESTRING:
2414 if (dataLen)
2415 bytesNeeded += (dataLen + 1) * 2;
2416 break;
2417 case ASN_IA5STRING:
2418 if (dataLen)
2419 bytesNeeded += (dataLen + 1) * 2;
2420 break;
2421 case ASN_T61STRING:
2422 if (dataLen)
2423 bytesNeeded += (dataLen + 1) * 2;
2424 break;
2425 case ASN_VIDEOTEXSTRING:
2426 if (dataLen)
2427 bytesNeeded += (dataLen + 1) * 2;
2428 break;
2429 case ASN_GRAPHICSTRING:
2430 if (dataLen)
2431 bytesNeeded += (dataLen + 1) * 2;
2432 break;
2433 case ASN_VISIBLESTRING:
2434 if (dataLen)
2435 bytesNeeded += (dataLen + 1) * 2;
2436 break;
2437 case ASN_GENERALSTRING:
2438 if (dataLen)
2439 bytesNeeded += (dataLen + 1) * 2;
2440 break;
2441 case ASN_UNIVERSALSTRING:
2442 if (dataLen)
2443 bytesNeeded += dataLen / 2 + sizeof(WCHAR);
2444 break;
2445 case ASN_BMPSTRING:
2446 if (dataLen)
2447 bytesNeeded += dataLen + sizeof(WCHAR);
2448 break;
2449 case ASN_UTF8STRING:
2450 if (dataLen)
2451 bytesNeeded += (MultiByteToWideChar(CP_UTF8, 0,
2452 (LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) + 1) * 2;
2453 break;
2454 default:
2455 SetLastError(CRYPT_E_ASN1_BADTAG);
2456 return FALSE;
2457 }
2458
2459 if (pcbDecoded)
2460 *pcbDecoded = 1 + lenBytes + dataLen;
2461 if (!pvStructInfo)
2462 *pcbStructInfo = bytesNeeded;
2463 else if (*pcbStructInfo < bytesNeeded)
2464 {
2465 *pcbStructInfo = bytesNeeded;
2466 SetLastError(ERROR_MORE_DATA);
2467 ret = FALSE;
2468 }
2469 else
2470 {
2471 LPWSTR *pStr = pvStructInfo;
2472
2473 *pcbStructInfo = bytesNeeded;
2474 if (dataLen)
2475 {
2476 DWORD i;
2477 LPWSTR str = *(LPWSTR *)pStr;
2478
2479 assert(str);
2480 switch (pbEncoded[0])
2481 {
2482 case ASN_NUMERICSTRING:
2483 case ASN_PRINTABLESTRING:
2484 case ASN_IA5STRING:
2485 case ASN_T61STRING:
2486 case ASN_VIDEOTEXSTRING:
2487 case ASN_GRAPHICSTRING:
2488 case ASN_VISIBLESTRING:
2489 case ASN_GENERALSTRING:
2490 for (i = 0; i < dataLen; i++)
2491 str[i] = pbEncoded[1 + lenBytes + i];
2492 str[i] = 0;
2493 break;
2494 case ASN_UNIVERSALSTRING:
2495 for (i = 0; i < dataLen / 4; i++)
2496 str[i] = (pbEncoded[1 + lenBytes + 2 * i + 2] << 8)
2497 | pbEncoded[1 + lenBytes + 2 * i + 3];
2498 str[i] = 0;
2499 break;
2500 case ASN_BMPSTRING:
2501 for (i = 0; i < dataLen / 2; i++)
2502 str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
2503 pbEncoded[1 + lenBytes + 2 * i + 1];
2504 str[i] = 0;
2505 break;
2506 case ASN_UTF8STRING:
2507 {
2508 int len = MultiByteToWideChar(CP_UTF8, 0,
2509 (LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
2510 str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
2511 str[len] = 0;
2512 break;
2513 }
2514 }
2515 }
2516 else
2517 *pStr = NULL;
2518 }
2519 }
2520 return ret;
2521}
2522
2523static BOOL CRYPT_AsnDecodePolicyQualifierUserNoticeInternal(
2524 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
2525 DWORD *pcbStructInfo, DWORD *pcbDecoded)
2526{
2527 BOOL ret;
2528 struct AsnDecodeSequenceItem items[] = {
2529 { ASN_SEQUENCE, offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE,
2530 pNoticeReference), CRYPT_AsnDecodeNoticeReference,
2531 sizeof(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE), TRUE, TRUE,
2532 offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE, pNoticeReference), 0 },
2533 { 0, offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE, pszDisplayText),
2534 CRYPT_AsnDecodeUnicodeString, sizeof(LPWSTR), TRUE, TRUE,
2535 offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE, pszDisplayText), 0 },
2536 };
2537 PCERT_POLICY_QUALIFIER_USER_NOTICE notice = pvStructInfo;
2538
2539 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2540 pvStructInfo, *pcbStructInfo);
2541
2542 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2543 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
2544 pcbDecoded, notice ? notice->pNoticeReference : NULL);
2545 TRACE("returning %d\n", ret);
2546 return ret;
2547}
2548
2549static BOOL WINAPI CRYPT_AsnDecodePolicyQualifierUserNotice(
2550 DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
2551 DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
2552 void *pvStructInfo, DWORD *pcbStructInfo)
2553{
2554 BOOL ret = FALSE;
2555
2556 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2557 pDecodePara, pvStructInfo, *pcbStructInfo);
2558
2559 __TRY
2560 {
2561 DWORD bytesNeeded;
2562
2563 ret = CRYPT_AsnDecodePolicyQualifierUserNoticeInternal(pbEncoded,
2564 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded,
2565 NULL);
2566 if (ret)
2567 {
2568 if (!pvStructInfo)
2569 *pcbStructInfo = bytesNeeded;
2570 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2571 pvStructInfo, pcbStructInfo, bytesNeeded)))
2572 {
2573 PCERT_POLICY_QUALIFIER_USER_NOTICE notice;
2574
2575 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2576 pvStructInfo = *(BYTE **)pvStructInfo;
2577 notice = pvStructInfo;
2578 notice->pNoticeReference =
2579 (PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE)
2580 ((BYTE *)pvStructInfo +
2581 sizeof(CERT_POLICY_QUALIFIER_USER_NOTICE));
2582 ret = CRYPT_AsnDecodePolicyQualifierUserNoticeInternal(
2583 pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
2584 pvStructInfo, &bytesNeeded, NULL);
2585 }
2586 }
2587 }
2588 __EXCEPT(1)
2589 {
2590 SetLastError(STATUS_ACCESS_VIOLATION);
2591 }
2592 __ENDTRY
2593 TRACE("returning %d\n", ret);
2594 return ret;
2595}
2596
2597static BOOL CRYPT_AsnDecodePKCSAttributeInternal(const BYTE *pbEncoded,
2598 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2599 DWORD *pcbDecoded)
2600{
2601 BOOL ret;
2602 struct AsnDecodeSequenceItem items[] = {
2603 { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ATTRIBUTE, pszObjId),
2604 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
2605 offsetof(CRYPT_ATTRIBUTE, pszObjId), 0 },
2606 { ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_ATTRIBUTE, cValue),
2607 CRYPT_DecodeDERArray, sizeof(struct GenericArray), FALSE, TRUE,
2608 offsetof(CRYPT_ATTRIBUTE, rgValue), 0 },
2609 };
2610 PCRYPT_ATTRIBUTE attr = (PCRYPT_ATTRIBUTE)pvStructInfo;
2611
2612 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2613 pvStructInfo, *pcbStructInfo);
2614
2615 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2616 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
2617 pcbDecoded, attr ? attr->pszObjId : NULL);
2618 TRACE("returning %d\n", ret);
2619 return ret;
2620}
2621
2622static BOOL WINAPI CRYPT_AsnDecodePKCSAttribute(DWORD dwCertEncodingType,
2623 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2624 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2625{
2626 BOOL ret = FALSE;
2627
2628 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2629 pDecodePara, pvStructInfo, *pcbStructInfo);
2630
2631 __TRY
2632 {
2633 DWORD bytesNeeded;
2634
2635 ret = CRYPT_AsnDecodePKCSAttributeInternal(pbEncoded, cbEncoded,
2636 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
2637 if (ret)
2638 {
2639 if (!pvStructInfo)
2640 *pcbStructInfo = bytesNeeded;
2641 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2642 pvStructInfo, pcbStructInfo, bytesNeeded)))
2643 {
2644 PCRYPT_ATTRIBUTE attr;
2645
2646 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2647 pvStructInfo = *(BYTE **)pvStructInfo;
2648 attr = (PCRYPT_ATTRIBUTE)pvStructInfo;
2649 attr->pszObjId = (LPSTR)((BYTE *)pvStructInfo +
2650 sizeof(CRYPT_ATTRIBUTE));
2651 ret = CRYPT_AsnDecodePKCSAttributeInternal(pbEncoded, cbEncoded,
2652 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo, &bytesNeeded,
2653 NULL);
2654 }
2655 }
2656 }
2657 __EXCEPT(1)
2658 {
2659 SetLastError(STATUS_ACCESS_VIOLATION);
2660 }
2661 __ENDTRY
2662 TRACE("returning %d\n", ret);
2663 return ret;
2664}
2665
2666static BOOL CRYPT_AsnDecodePKCSAttributesInternal(const BYTE *pbEncoded,
2667 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2668 DWORD *pcbDecoded)
2669{
2670 struct AsnArrayDescriptor arrayDesc = { 0,
2671 CRYPT_AsnDecodePKCSAttributeInternal, sizeof(CRYPT_ATTRIBUTE), TRUE,
2672 offsetof(CRYPT_ATTRIBUTE, pszObjId) };
2673 PCRYPT_ATTRIBUTES attrs = (PCRYPT_ATTRIBUTES)pvStructInfo;
2674 BOOL ret;
2675
2676 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2677 NULL, pvStructInfo, pcbStructInfo, pcbDecoded, attrs ? attrs->rgAttr :
2678 NULL);
2679 return ret;
2680}
2681
2682static BOOL WINAPI CRYPT_AsnDecodePKCSAttributes(DWORD dwCertEncodingType,
2683 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2684 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2685{
2686 BOOL ret = FALSE;
2687
2688 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2689 pDecodePara, pvStructInfo, *pcbStructInfo);
2690
2691 __TRY
2692 {
2693 DWORD bytesNeeded;
2694
2695 if (!cbEncoded)
2696 SetLastError(CRYPT_E_ASN1_EOD);
2697 else if (pbEncoded[0] != (ASN_CONSTRUCTOR | ASN_SETOF))
2698 SetLastError(CRYPT_E_ASN1_CORRUPT);
2699 else if ((ret = CRYPT_AsnDecodePKCSAttributesInternal(pbEncoded,
2700 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded,
2701 NULL)))
2702 {
2703 if (!pvStructInfo)
2704 *pcbStructInfo = bytesNeeded;
2705 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2706 pvStructInfo, pcbStructInfo, bytesNeeded)))
2707 {
2708 PCRYPT_ATTRIBUTES attrs;
2709
2710 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2711 pvStructInfo = *(BYTE **)pvStructInfo;
2712 attrs = (PCRYPT_ATTRIBUTES)pvStructInfo;
2713 attrs->rgAttr = (PCRYPT_ATTRIBUTE)((BYTE *)pvStructInfo +
2714 sizeof(CRYPT_ATTRIBUTES));
2715 ret = CRYPT_AsnDecodePKCSAttributesInternal(pbEncoded,
2716 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
2717 &bytesNeeded, NULL);
2718 }
2719 }
2720 }
2721 __EXCEPT(1)
2722 {
2723 SetLastError(STATUS_ACCESS_VIOLATION);
2724 }
2725 __ENDTRY
2726 TRACE("returning %d\n", ret);
2727 return ret;
2728}
2729
2730static BOOL CRYPT_AsnDecodeAlgorithmId(const BYTE *pbEncoded, DWORD cbEncoded,
2731 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2732{
2733 CRYPT_ALGORITHM_IDENTIFIER *algo =
2734 (CRYPT_ALGORITHM_IDENTIFIER *)pvStructInfo;
2735 BOOL ret = TRUE;
2736 struct AsnDecodeSequenceItem items[] = {
2737 { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId),
2738 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
2739 offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId), 0 },
2740 { 0, offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters),
2741 CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
2742 offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters.pbData), 0 },
2743 };
2744
2745 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
2746 pvStructInfo, *pcbStructInfo, pcbDecoded);
2747
2748 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2749 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
2750 pcbDecoded, algo ? algo->pszObjId : NULL);
2751 if (ret && pvStructInfo)
2752 {
2753 TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
2754 debugstr_a(algo->pszObjId));
2755 }
2756 return ret;
2757}
2758
2759static BOOL CRYPT_AsnDecodePubKeyInfoInternal(const BYTE *pbEncoded,
2760 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2761 DWORD *pcbDecoded)
2762{
2763 BOOL ret = TRUE;
2764 struct AsnDecodeSequenceItem items[] = {
2765 { ASN_SEQUENCEOF, offsetof(CERT_PUBLIC_KEY_INFO, Algorithm),
2766 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
2767 FALSE, TRUE, offsetof(CERT_PUBLIC_KEY_INFO,
2768 Algorithm.pszObjId) },
2769 { ASN_BITSTRING, offsetof(CERT_PUBLIC_KEY_INFO, PublicKey),
2770 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
2771 offsetof(CERT_PUBLIC_KEY_INFO, PublicKey.pbData) },
2772 };
2773 PCERT_PUBLIC_KEY_INFO info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
2774
2775 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
2776 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
2777 pcbDecoded, info ? info->Algorithm.Parameters.pbData : NULL);
2778 return ret;
2779}
2780
2781static BOOL WINAPI CRYPT_AsnDecodePubKeyInfo(DWORD dwCertEncodingType,
2782 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2783 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2784{
2785 BOOL ret = TRUE;
2786
2787 __TRY
2788 {
2789 DWORD bytesNeeded;
2790
2791 if ((ret = CRYPT_AsnDecodePubKeyInfoInternal(pbEncoded, cbEncoded,
2792 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
2793 {
2794 if (!pvStructInfo)
2795 *pcbStructInfo = bytesNeeded;
2796 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2797 pvStructInfo, pcbStructInfo, bytesNeeded)))
2798 {
2799 PCERT_PUBLIC_KEY_INFO info;
2800
2801 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2802 pvStructInfo = *(BYTE **)pvStructInfo;
2803 info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
2804 info->Algorithm.Parameters.pbData = (BYTE *)pvStructInfo +
2805 sizeof(CERT_PUBLIC_KEY_INFO);
2806 ret = CRYPT_AsnDecodePubKeyInfoInternal(pbEncoded, cbEncoded,
2807 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
2808 &bytesNeeded, NULL);
2809 }
2810 }
2811 }
2812 __EXCEPT(1)
2813 {
2814 SetLastError(STATUS_ACCESS_VIOLATION);
2815 ret = FALSE;
2816 }
2817 __ENDTRY
2818 return ret;
2819}
2820
2821static BOOL CRYPT_AsnDecodeBool(const BYTE *pbEncoded, DWORD cbEncoded,
2822 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2823{
2824 BOOL ret;
2825
2826 if (cbEncoded < 3)
2827 {
2828 SetLastError(CRYPT_E_ASN1_CORRUPT);
2829 return FALSE;
2830 }
2831 if (GET_LEN_BYTES(pbEncoded[1]) > 1)
2832 {
2833 SetLastError(CRYPT_E_ASN1_CORRUPT);
2834 return FALSE;
2835 }
2836 if (pbEncoded[1] > 1)
2837 {
2838 SetLastError(CRYPT_E_ASN1_CORRUPT);
2839 return FALSE;
2840 }
2841 if (pcbDecoded)
2842 *pcbDecoded = 3;
2843 if (!pvStructInfo)
2844 {
2845 *pcbStructInfo = sizeof(BOOL);
2846 ret = TRUE;
2847 }
2848 else if (*pcbStructInfo < sizeof(BOOL))
2849 {
2850 *pcbStructInfo = sizeof(BOOL);
2851 SetLastError(ERROR_MORE_DATA);
2852 ret = FALSE;
2853 }
2854 else
2855 {
2856 *pcbStructInfo = sizeof(BOOL);
2857 *(BOOL *)pvStructInfo = pbEncoded[2] ? TRUE : FALSE;
2858 ret = TRUE;
2859 }
2860 TRACE("returning %d (%08x)\n", ret, GetLastError());
2861 return ret;
2862}
2863
2864static BOOL CRYPT_AsnDecodeAltNameEntry(const BYTE *pbEncoded, DWORD cbEncoded,
2865 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
2866{
2867 PCERT_ALT_NAME_ENTRY entry = (PCERT_ALT_NAME_ENTRY)pvStructInfo;
2868 DWORD dataLen, lenBytes, bytesNeeded = sizeof(CERT_ALT_NAME_ENTRY);
2869 BOOL ret;
2870
2871 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2872 pvStructInfo, *pcbStructInfo);
2873
2874 if (cbEncoded < 2)
2875 {
2876 SetLastError(CRYPT_E_ASN1_CORRUPT);
2877 return FALSE;
2878 }
2879 lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2880 if (1 + lenBytes > cbEncoded)
2881 {
2882 SetLastError(CRYPT_E_ASN1_CORRUPT);
2883 return FALSE;
2884 }
2885 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2886 {
2887 switch (pbEncoded[0] & ASN_TYPE_MASK)
2888 {
2889 case 1: /* rfc822Name */
2890 case 2: /* dNSName */
2891 case 6: /* uniformResourceIdentifier */
2892 bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
2893 break;
2894 case 4: /* directoryName */
2895 case 7: /* iPAddress */
2896 bytesNeeded += dataLen;
2897 break;
2898 case 8: /* registeredID */
2899 ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, 0, NULL,
2900 &dataLen, NULL);
2901 if (ret)
2902 {
2903 /* FIXME: ugly, shouldn't need to know internals of OID decode
2904 * function to use it.
2905 */
2906 bytesNeeded += dataLen - sizeof(LPSTR);
2907 }
2908 break;
2909 case 0: /* otherName */
2910 FIXME("%d: stub\n", pbEncoded[0] & ASN_TYPE_MASK);
2911 SetLastError(CRYPT_E_ASN1_BADTAG);
2912 ret = FALSE;
2913 break;
2914 case 3: /* x400Address, unimplemented */
2915 case 5: /* ediPartyName, unimplemented */
2916 TRACE("type %d unimplemented\n", pbEncoded[0] & ASN_TYPE_MASK);
2917 SetLastError(CRYPT_E_ASN1_BADTAG);
2918 ret = FALSE;
2919 break;
2920 default:
2921 TRACE("type %d bad\n", pbEncoded[0] & ASN_TYPE_MASK);
2922 SetLastError(CRYPT_E_ASN1_CORRUPT);
2923 ret = FALSE;
2924 }
2925 if (ret)
2926 {
2927 if (pcbDecoded)
2928 *pcbDecoded = 1 + lenBytes + dataLen;
2929 if (!entry)
2930 *pcbStructInfo = bytesNeeded;
2931 else if (*pcbStructInfo < bytesNeeded)
2932 {
2933 *pcbStructInfo = bytesNeeded;
2934 SetLastError(ERROR_MORE_DATA);
2935 ret = FALSE;
2936 }
2937 else
2938 {
2939 *pcbStructInfo = bytesNeeded;
2940 /* MS used values one greater than the asn1 ones.. sigh */
2941 entry->dwAltNameChoice = (pbEncoded[0] & ASN_TYPE_MASK) + 1;
2942 switch (pbEncoded[0] & ASN_TYPE_MASK)
2943 {
2944 case 1: /* rfc822Name */
2945 case 2: /* dNSName */
2946 case 6: /* uniformResourceIdentifier */
2947 {
2948 DWORD i;
2949
2950 for (i = 0; i < dataLen; i++)
2951 entry->u.pwszURL[i] =
2952 (WCHAR)pbEncoded[1 + lenBytes + i];
2953 entry->u.pwszURL[i] = 0;
2954 TRACE("URL is %p (%s)\n", entry->u.pwszURL,
2955 debugstr_w(entry->u.pwszURL));
2956 break;
2957 }
2958 case 4: /* directoryName */
2959 /* The data are memory-equivalent with the IPAddress case,
2960 * fall-through
2961 */
2962 case 7: /* iPAddress */
2963 /* The next data pointer is in the pwszURL spot, that is,
2964 * the first 4 bytes. Need to move it to the next spot.
2965 */
2966 entry->u.IPAddress.pbData = (LPBYTE)entry->u.pwszURL;
2967 entry->u.IPAddress.cbData = dataLen;
2968 memcpy(entry->u.IPAddress.pbData, pbEncoded + 1 + lenBytes,
2969 dataLen);
2970 break;
2971 case 8: /* registeredID */
2972 ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, 0,
2973 &entry->u.pszRegisteredID, &dataLen, NULL);
2974 break;
2975 }
2976 }
2977 }
2978 }
2979 return ret;
2980}
2981
2982static BOOL CRYPT_AsnDecodeAltNameInternal(const BYTE *pbEncoded,
2983 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
2984 DWORD *pcbDecoded)
2985{
2986 BOOL ret = TRUE;
2987 struct AsnArrayDescriptor arrayDesc = { 0,
2988 CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
2989 offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
2990 PCERT_ALT_NAME_INFO info = (PCERT_ALT_NAME_INFO)pvStructInfo;
2991
2992 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
2993 pvStructInfo, *pcbStructInfo, pcbDecoded);
2994
2995 if (info)
2996 TRACE("info->rgAltEntry is %p\n", info->rgAltEntry);
2997 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2998 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
2999 info ? info->rgAltEntry : NULL);
3000 return ret;
3001}
3002
3003/* Like CRYPT_AsnDecodeIntegerInternal, but swaps the bytes */
3004static BOOL CRYPT_AsnDecodeIntegerSwapBytes(const BYTE *pbEncoded,
3005 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3006 DWORD *pcbDecoded)
3007{
3008 BOOL ret;
3009
3010 TRACE("(%p, %d, 0x%08x, %p, %d, %p)\n", pbEncoded, cbEncoded, dwFlags,
3011 pvStructInfo, *pcbStructInfo, pcbDecoded);
3012
3013 /* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
3014 * place.
3015 */
3016 ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
3017 dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pvStructInfo, pcbStructInfo,
3018 pcbDecoded);
3019 if (ret && pvStructInfo)
3020 {
3021 CRYPT_DATA_BLOB *blob = (CRYPT_DATA_BLOB *)pvStructInfo;
3022
3023 if (blob->cbData)
3024 {
3025 DWORD i;
3026 BYTE temp;
3027
3028 for (i = 0; i < blob->cbData / 2; i++)
3029 {
3030 temp = blob->pbData[i];
3031 blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
3032 blob->pbData[blob->cbData - i - 1] = temp;
3033 }
3034 }
3035 }
3036 TRACE("returning %d (%08x)\n", ret, GetLastError());
3037 return ret;
3038}
3039
3040static BOOL WINAPI CRYPT_AsnDecodeAuthorityKeyId(DWORD dwCertEncodingType,
3041 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3042 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3043{
3044 BOOL ret;
3045
3046 __TRY
3047 {
3048 struct AsnDecodeSequenceItem items[] = {
3049 { ASN_CONTEXT | 0, offsetof(CERT_AUTHORITY_KEY_ID_INFO, KeyId),
3050 CRYPT_AsnDecodeIntegerSwapBytes, sizeof(CRYPT_DATA_BLOB),
3051 TRUE, TRUE, offsetof(CERT_AUTHORITY_KEY_ID_INFO, KeyId.pbData), 0 },
3052 { ASN_CONTEXT | ASN_CONSTRUCTOR| 1,
3053 offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertIssuer),
3054 CRYPT_AsnDecodeOctetsInternal, sizeof(CERT_NAME_BLOB), TRUE, TRUE,
3055 offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertIssuer.pbData), 0 },
3056 { ASN_CONTEXT | 2, offsetof(CERT_AUTHORITY_KEY_ID_INFO,
3057 CertSerialNumber), CRYPT_AsnDecodeIntegerInternal,
3058 sizeof(CRYPT_INTEGER_BLOB), TRUE, TRUE,
3059 offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertSerialNumber.pbData), 0 },
3060 };
3061
3062 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3063 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
3064 pcbStructInfo, NULL, NULL);
3065 }
3066 __EXCEPT(1)
3067 {
3068 SetLastError(STATUS_ACCESS_VIOLATION);
3069 ret = FALSE;
3070 }
3071 __ENDTRY
3072 return ret;
3073}
3074
3075static BOOL WINAPI CRYPT_AsnDecodeAuthorityKeyId2(DWORD dwCertEncodingType,
3076 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3077 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3078{
3079 BOOL ret;
3080
3081 __TRY
3082 {
3083 struct AsnDecodeSequenceItem items[] = {
3084 { ASN_CONTEXT | 0, offsetof(CERT_AUTHORITY_KEY_ID2_INFO, KeyId),
3085 CRYPT_AsnDecodeIntegerSwapBytes, sizeof(CRYPT_DATA_BLOB),
3086 TRUE, TRUE, offsetof(CERT_AUTHORITY_KEY_ID2_INFO, KeyId.pbData), 0 },
3087 { ASN_CONTEXT | ASN_CONSTRUCTOR| 1,
3088 offsetof(CERT_AUTHORITY_KEY_ID2_INFO, AuthorityCertIssuer),
3089 CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE,
3090 TRUE, offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
3091 AuthorityCertIssuer.rgAltEntry), 0 },
3092 { ASN_CONTEXT | 2, offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
3093 AuthorityCertSerialNumber), CRYPT_AsnDecodeIntegerInternal,
3094 sizeof(CRYPT_INTEGER_BLOB), TRUE, TRUE,
3095 offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
3096 AuthorityCertSerialNumber.pbData), 0 },
3097 };
3098
3099 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3100 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
3101 pcbStructInfo, NULL, NULL);
3102 }
3103 __EXCEPT(1)
3104 {
3105 SetLastError(STATUS_ACCESS_VIOLATION);
3106 ret = FALSE;
3107 }
3108 __ENDTRY
3109 return ret;
3110}
3111
3112static BOOL CRYPT_AsnDecodeAccessDescription(const BYTE *pbEncoded,
3113 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3114 DWORD *pcbDecoded)
3115{
3116 struct AsnDecodeSequenceItem items[] = {
3117 { 0, offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod),
3118 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
3119 offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod), 0 },
3120 { 0, offsetof(CERT_ACCESS_DESCRIPTION, AccessLocation),
3121 CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), FALSE,
3122 TRUE, offsetof(CERT_ACCESS_DESCRIPTION, AccessLocation.u.pwszURL), 0 },
3123 };
3124 CERT_ACCESS_DESCRIPTION *descr = (CERT_ACCESS_DESCRIPTION *)pvStructInfo;
3125
3126 return CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3127 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
3128 pcbDecoded, descr ? descr->pszAccessMethod : NULL);
3129}
3130
3131static BOOL WINAPI CRYPT_AsnDecodeAuthorityInfoAccess(DWORD dwCertEncodingType,
3132 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3133 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3134{
3135 BOOL ret;
3136
3137 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3138 pDecodePara, pvStructInfo, *pcbStructInfo);
3139
3140 __TRY
3141 {
3142 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
3143 CRYPT_AsnDecodeAccessDescription, sizeof(CERT_ACCESS_DESCRIPTION),
3144 TRUE, offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod) };
3145
3146 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
3147 pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
3148 }
3149 __EXCEPT(1)
3150 {
3151 SetLastError(STATUS_ACCESS_VIOLATION);
3152 ret = FALSE;
3153 }
3154 __ENDTRY
3155 return ret;
3156}
3157
3158static BOOL CRYPT_AsnDecodePKCSContent(const BYTE *pbEncoded, DWORD cbEncoded,
3159 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
3160{
3161 BOOL ret;
3162 DWORD dataLen;
3163
3164 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
3165 pvStructInfo, *pcbStructInfo, pcbDecoded);
3166
3167 /* The caller has already checked the tag, no need to check it again.
3168 * Check the outer length is valid:
3169 */
3170 if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
3171 {
3172 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
3173 DWORD innerLen;
3174
3175 pbEncoded += 1 + lenBytes;
3176 cbEncoded -= 1 + lenBytes;
3177 if (dataLen == CMSG_INDEFINITE_LENGTH)
3178 cbEncoded -= 2; /* space for 0 TLV */
3179 /* Check the inner length is valid: */
3180 if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &innerLen)))
3181 {
3182 DWORD decodedLen;
3183
3184 ret = CRYPT_AsnDecodeCopyBytes(pbEncoded, cbEncoded, dwFlags,
3185 pvStructInfo, pcbStructInfo, &decodedLen);
3186 if (dataLen == CMSG_INDEFINITE_LENGTH)
3187 {
3188 if (*(pbEncoded + decodedLen) != 0 ||
3189 *(pbEncoded + decodedLen + 1) != 0)
3190 {
3191 TRACE("expected 0 TLV, got {%02x,%02x}\n",
3192 *(pbEncoded + decodedLen),
3193 *(pbEncoded + decodedLen + 1));
3194 SetLastError(CRYPT_E_ASN1_CORRUPT);
3195 ret = FALSE;
3196 }
3197 else
3198 decodedLen += 2;
3199 }
3200 if (ret && pcbDecoded)
3201 {
3202 *pcbDecoded = 1 + lenBytes + decodedLen;
3203 TRACE("decoded %d bytes\n", *pcbDecoded);
3204 }
3205 }
3206 }
3207 return ret;
3208}
3209
3210static BOOL CRYPT_AsnDecodePKCSContentInfoInternal(const BYTE *pbEncoded,
3211 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3212 DWORD *pcbDecoded)
3213{
3214 CRYPT_CONTENT_INFO *info = (CRYPT_CONTENT_INFO *)pvStructInfo;
3215 struct AsnDecodeSequenceItem items[] = {
3216 { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_CONTENT_INFO, pszObjId),
3217 CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
3218 offsetof(CRYPT_CONTENT_INFO, pszObjId), 0 },
3219 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
3220 offsetof(CRYPT_CONTENT_INFO, Content), CRYPT_AsnDecodePKCSContent,
3221 sizeof(CRYPT_DER_BLOB), TRUE, TRUE,
3222 offsetof(CRYPT_CONTENT_INFO, Content.pbData), 0 },
3223 };
3224 BOOL ret;
3225
3226 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
3227 pvStructInfo, *pcbStructInfo, pcbDecoded);
3228
3229 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3230 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
3231 pcbDecoded, info ? info->pszObjId : NULL);
3232 return ret;
3233}
3234
3235static BOOL WINAPI CRYPT_AsnDecodePKCSContentInfo(DWORD dwCertEncodingType,
3236 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3237 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3238{
3239 BOOL ret = FALSE;
3240
3241 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3242 pDecodePara, pvStructInfo, *pcbStructInfo);
3243
3244 __TRY
3245 {
3246 ret = CRYPT_AsnDecodePKCSContentInfoInternal(pbEncoded, cbEncoded,
3247 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
3248 if (ret && pvStructInfo)
3249 {
3250 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
3251 pcbStructInfo, *pcbStructInfo);
3252 if (ret)
3253 {
3254 CRYPT_CONTENT_INFO *info;
3255
3256 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3257 pvStructInfo = *(BYTE **)pvStructInfo;
3258 info = (CRYPT_CONTENT_INFO *)pvStructInfo;
3259 info->pszObjId = (LPSTR)((BYTE *)info +
3260 sizeof(CRYPT_CONTENT_INFO));
3261 ret = CRYPT_AsnDecodePKCSContentInfoInternal(pbEncoded,
3262 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
3263 pcbStructInfo, NULL);
3264 }
3265 }
3266 }
3267 __EXCEPT(1)
3268 {
3269 SetLastError(STATUS_ACCESS_VIOLATION);
3270 }
3271 __ENDTRY
3272 return ret;
3273}
3274
3275BOOL CRYPT_AsnDecodePKCSDigestedData(const BYTE *pbEncoded, DWORD cbEncoded,
3276 DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
3277 CRYPT_DIGESTED_DATA *digestedData, DWORD *pcbDigestedData)
3278{
3279 BOOL ret;
3280 struct AsnDecodeSequenceItem items[] = {
3281 { ASN_INTEGER, offsetof(CRYPT_DIGESTED_DATA, version),
3282 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
3283 { ASN_SEQUENCEOF, offsetof(CRYPT_DIGESTED_DATA, DigestAlgorithm),
3284 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
3285 FALSE, TRUE, offsetof(CRYPT_DIGESTED_DATA, DigestAlgorithm.pszObjId),
3286 0 },
3287 { ASN_SEQUENCEOF, offsetof(CRYPT_DIGESTED_DATA, ContentInfo),
3288 CRYPT_AsnDecodePKCSContentInfoInternal,
3289 sizeof(CRYPT_CONTENT_INFO), FALSE, TRUE, offsetof(CRYPT_DIGESTED_DATA,
3290 ContentInfo.pszObjId), 0 },
3291 { ASN_OCTETSTRING, offsetof(CRYPT_DIGESTED_DATA, hash),
3292 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_HASH_BLOB), FALSE, TRUE,
3293 offsetof(CRYPT_DIGESTED_DATA, hash.pbData), 0 },
3294 };
3295
3296 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3297 pbEncoded, cbEncoded, dwFlags, pDecodePara, digestedData, pcbDigestedData,
3298 NULL, NULL);
3299 return ret;
3300}
3301
3302static BOOL WINAPI CRYPT_AsnDecodeAltName(DWORD dwCertEncodingType,
3303 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3304 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3305{
3306 BOOL ret = TRUE;
3307
3308 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3309 pDecodePara, pvStructInfo, *pcbStructInfo);
3310
3311 __TRY
3312 {
3313 DWORD bytesNeeded;
3314
3315 if ((ret = CRYPT_AsnDecodeAltNameInternal(pbEncoded, cbEncoded,
3316 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
3317 {
3318 if (!pvStructInfo)
3319 *pcbStructInfo = bytesNeeded;
3320 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
3321 pvStructInfo, pcbStructInfo, bytesNeeded)))
3322 {
3323 CERT_ALT_NAME_INFO *name;
3324
3325 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3326 pvStructInfo = *(BYTE **)pvStructInfo;
3327 name = (CERT_ALT_NAME_INFO *)pvStructInfo;
3328 name->rgAltEntry = (PCERT_ALT_NAME_ENTRY)
3329 ((BYTE *)pvStructInfo + sizeof(CERT_ALT_NAME_INFO));
3330 ret = CRYPT_AsnDecodeAltNameInternal(pbEncoded, cbEncoded,
3331 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
3332 &bytesNeeded, NULL);
3333 }
3334 }
3335 }
3336 __EXCEPT(1)
3337 {
3338 SetLastError(STATUS_ACCESS_VIOLATION);
3339 ret = FALSE;
3340 }
3341 __ENDTRY
3342 return ret;
3343}
3344
3345struct PATH_LEN_CONSTRAINT
3346{
3347 BOOL fPathLenConstraint;
3348 DWORD dwPathLenConstraint;
3349};
3350
3351static BOOL CRYPT_AsnDecodePathLenConstraint(const BYTE *pbEncoded,
3352 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3353 DWORD *pcbDecoded)
3354{
3355 BOOL ret = TRUE;
3356 DWORD bytesNeeded = sizeof(struct PATH_LEN_CONSTRAINT), size;
3357
3358 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
3359 pvStructInfo, *pcbStructInfo, pcbDecoded);
3360
3361 if (!pvStructInfo)
3362 {
3363 ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags, NULL,
3364 &size, pcbDecoded);
3365 *pcbStructInfo = bytesNeeded;
3366 }
3367 else if (*pcbStructInfo < bytesNeeded)
3368 {
3369 SetLastError(ERROR_MORE_DATA);
3370 *pcbStructInfo = bytesNeeded;
3371 ret = FALSE;
3372 }
3373 else
3374 {
3375 struct PATH_LEN_CONSTRAINT *constraint =
3376 (struct PATH_LEN_CONSTRAINT *)pvStructInfo;
3377
3378 *pcbStructInfo = bytesNeeded;
3379 size = sizeof(constraint->dwPathLenConstraint);
3380 ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
3381 &constraint->dwPathLenConstraint, &size, pcbDecoded);
3382 if (ret)
3383 constraint->fPathLenConstraint = TRUE;
3384 TRACE("got an int, dwPathLenConstraint is %d\n",
3385 constraint->dwPathLenConstraint);
3386 }
3387 TRACE("returning %d (%08x)\n", ret, GetLastError());
3388 return ret;
3389}
3390
3391static BOOL CRYPT_AsnDecodeSubtreeConstraints(const BYTE *pbEncoded,
3392 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3393 DWORD *pcbDecoded)
3394{
3395 BOOL ret;
3396 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
3397 CRYPT_AsnDecodeCopyBytes, sizeof(CERT_NAME_BLOB), TRUE,
3398 offsetof(CERT_NAME_BLOB, pbData) };
3399 struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
3400
3401 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
3402 pvStructInfo, *pcbStructInfo, pcbDecoded);
3403
3404 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
3405 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
3406 entries ? entries->rgItems : NULL);
3407 TRACE("Returning %d (%08x)\n", ret, GetLastError());
3408 return ret;
3409}
3410
3411static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints(DWORD dwCertEncodingType,
3412 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3413 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3414{
3415 BOOL ret;
3416
3417 __TRY
3418 {
3419 struct AsnDecodeSequenceItem items[] = {
3420 { ASN_BITSTRING, offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType),
3421 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
3422 offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType.pbData), 0 },
3423 { ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
3424 fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
3425 sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
3426 { ASN_SEQUENCEOF, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
3427 cSubtreesConstraint), CRYPT_AsnDecodeSubtreeConstraints,
3428 sizeof(struct GenericArray), TRUE, TRUE,
3429 offsetof(CERT_BASIC_CONSTRAINTS_INFO, rgSubtreesConstraint), 0 },
3430 };
3431
3432 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3433 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
3434 pcbStructInfo, NULL, NULL);
3435 }
3436 __EXCEPT(1)
3437 {
3438 SetLastError(STATUS_ACCESS_VIOLATION);
3439 ret = FALSE;
3440 }
3441 __ENDTRY
3442 return ret;
3443}
3444
3445static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints2(DWORD dwCertEncodingType,
3446 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3447 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3448{
3449 BOOL ret;
3450
3451 __TRY
3452 {
3453 struct AsnDecodeSequenceItem items[] = {
3454 { ASN_BOOL, offsetof(CERT_BASIC_CONSTRAINTS2_INFO, fCA),
3455 CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0, 0 },
3456 { ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS2_INFO,
3457 fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
3458 sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
3459 };
3460
3461 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3462 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
3463 pcbStructInfo, NULL, NULL);
3464 }
3465 __EXCEPT(1)
3466 {
3467 SetLastError(STATUS_ACCESS_VIOLATION);
3468 ret = FALSE;
3469 }
3470 __ENDTRY
3471 return ret;
3472}
3473
3474static BOOL CRYPT_AsnDecodePolicyQualifier(const BYTE *pbEncoded,
3475 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3476 DWORD *pcbDecoded)
3477{
3478 struct AsnDecodeSequenceItem items[] = {
3479 { ASN_OBJECTIDENTIFIER, offsetof(CERT_POLICY_QUALIFIER_INFO,
3480 pszPolicyQualifierId), CRYPT_AsnDecodeOidInternal, sizeof(LPSTR),
3481 FALSE, TRUE, offsetof(CERT_POLICY_QUALIFIER_INFO, pszPolicyQualifierId),
3482 0 },
3483 { 0, offsetof(CERT_POLICY_QUALIFIER_INFO, Qualifier),
3484 CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
3485 offsetof(CERT_POLICY_QUALIFIER_INFO, Qualifier.pbData), 0 },
3486 };
3487 BOOL ret;
3488 CERT_POLICY_QUALIFIER_INFO *qualifier = pvStructInfo;
3489
3490 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3491 pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
3492
3493 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3494 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
3495 pcbDecoded, qualifier ? qualifier->pszPolicyQualifierId : NULL);
3496 return ret;
3497}
3498
3499static BOOL CRYPT_AsnDecodePolicyQualifiers(const BYTE *pbEncoded,
3500 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3501 DWORD *pcbDecoded)
3502{
3503 BOOL ret;
3504 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
3505 CRYPT_AsnDecodePolicyQualifier, sizeof(CERT_POLICY_QUALIFIER_INFO), TRUE,
3506 offsetof(CERT_POLICY_QUALIFIER_INFO, pszPolicyQualifierId) };
3507 struct GenericArray *entries = pvStructInfo;
3508
3509 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3510 pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
3511
3512 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
3513 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
3514 entries ? entries->rgItems : NULL);
3515 TRACE("Returning %d (%08x)\n", ret, GetLastError());
3516 return ret;
3517}
3518
3519static BOOL CRYPT_AsnDecodeCertPolicy(const BYTE *pbEncoded, DWORD cbEncoded,
3520 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
3521{
3522 struct AsnDecodeSequenceItem items[] = {
3523 { ASN_OBJECTIDENTIFIER, offsetof(CERT_POLICY_INFO, pszPolicyIdentifier),
3524 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
3525 offsetof(CERT_POLICY_INFO, pszPolicyIdentifier), 0 },
3526 { ASN_SEQUENCEOF, offsetof(CERT_POLICY_INFO, cPolicyQualifier),
3527 CRYPT_AsnDecodePolicyQualifiers, sizeof(struct GenericArray), TRUE,
3528 TRUE, offsetof(CERT_POLICY_INFO, rgPolicyQualifier), 0 },
3529 };
3530 CERT_POLICY_INFO *info = pvStructInfo;
3531 BOOL ret;
3532
3533 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3534 pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
3535
3536 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3537 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
3538 pcbDecoded, info ? info->pszPolicyIdentifier : NULL);
3539 return ret;
3540}
3541
3542static BOOL WINAPI CRYPT_AsnDecodeCertPolicies(DWORD dwCertEncodingType,
3543 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3544 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3545{
3546 BOOL ret = FALSE;
3547
3548 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3549 pDecodePara, pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
3550
3551 __TRY
3552 {
3553 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
3554 CRYPT_AsnDecodeCertPolicy, sizeof(CERT_POLICY_INFO), TRUE,
3555 offsetof(CERT_POLICY_INFO, pszPolicyIdentifier) };
3556
3557 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
3558 pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
3559 }
3560 __EXCEPT(1)
3561 {
3562 SetLastError(STATUS_ACCESS_VIOLATION);
3563 }
3564 __ENDTRY
3565 return ret;
3566}
3567
3568#define RSA1_MAGIC 0x31415352
3569
3570struct DECODED_RSA_PUB_KEY
3571{
3572 DWORD pubexp;
3573 CRYPT_INTEGER_BLOB modulus;
3574};
3575
3576static BOOL WINAPI CRYPT_AsnDecodeRsaPubKey(DWORD dwCertEncodingType,
3577 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3578 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3579{
3580 BOOL ret;
3581
3582 __TRY
3583 {
3584 struct AsnDecodeSequenceItem items[] = {
3585 { ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, modulus),
3586 CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
3587 FALSE, TRUE, offsetof(struct DECODED_RSA_PUB_KEY, modulus.pbData),
3588 0 },
3589 { ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, pubexp),
3590 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
3591 };
3592 struct DECODED_RSA_PUB_KEY *decodedKey = NULL;
3593 DWORD size = 0;
3594
3595 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
3596 pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL, &decodedKey,
3597 &size, NULL, NULL);
3598 if (ret)
3599 {
3600 DWORD bytesNeeded = sizeof(BLOBHEADER) + sizeof(RSAPUBKEY) +
3601 decodedKey->modulus.cbData;
3602
3603 if (!pvStructInfo)
3604 {
3605 *pcbStructInfo = bytesNeeded;
3606 ret = TRUE;
3607 }
3608 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
3609 pvStructInfo, pcbStructInfo, bytesNeeded)))
3610 {
3611 BLOBHEADER *hdr;
3612 RSAPUBKEY *rsaPubKey;
3613
3614 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3615 pvStructInfo = *(BYTE **)pvStructInfo;
3616 hdr = (BLOBHEADER *)pvStructInfo;
3617 hdr->bType = PUBLICKEYBLOB;
3618 hdr->bVersion = CUR_BLOB_VERSION;
3619 hdr->reserved = 0;
3620 hdr->aiKeyAlg = CALG_RSA_KEYX;
3621 rsaPubKey = (RSAPUBKEY *)((BYTE *)pvStructInfo +
3622 sizeof(BLOBHEADER));
3623 rsaPubKey->magic = RSA1_MAGIC;
3624 rsaPubKey->pubexp = decodedKey->pubexp;
3625 rsaPubKey->bitlen = decodedKey->modulus.cbData * 8;
3626 memcpy((BYTE *)pvStructInfo + sizeof(BLOBHEADER) +
3627 sizeof(RSAPUBKEY), decodedKey->modulus.pbData,
3628 decodedKey->modulus.cbData);
3629 }
3630 LocalFree(decodedKey);
3631 }
3632 }
3633 __EXCEPT(1)
3634 {
3635 SetLastError(STATUS_ACCESS_VIOLATION);
3636 ret = FALSE;
3637 }
3638 __ENDTRY
3639 return ret;
3640}
3641
3642static BOOL CRYPT_AsnDecodeOctetsInternal(const BYTE *pbEncoded,
3643 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3644 DWORD *pcbDecoded)
3645{
3646 BOOL ret;
3647 DWORD bytesNeeded, dataLen;
3648
3649 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
3650 pvStructInfo, *pcbStructInfo, pcbDecoded);
3651
3652 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
3653 {
3654 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
3655
3656 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
3657 bytesNeeded = sizeof(CRYPT_DATA_BLOB);
3658 else
3659 bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
3660 if (pcbDecoded)
3661 *pcbDecoded = 1 + lenBytes + dataLen;
3662 if (!pvStructInfo)
3663 *pcbStructInfo = bytesNeeded;
3664 else if (*pcbStructInfo < bytesNeeded)
3665 {
3666 SetLastError(ERROR_MORE_DATA);
3667 *pcbStructInfo = bytesNeeded;
3668 ret = FALSE;
3669 }
3670 else
3671 {
3672 CRYPT_DATA_BLOB *blob;
3673
3674 *pcbStructInfo = bytesNeeded;
3675 blob = (CRYPT_DATA_BLOB *)pvStructInfo;
3676 blob->cbData = dataLen;
3677 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
3678 blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
3679 else
3680 {
3681 assert(blob->pbData);
3682 if (blob->cbData)
3683 memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
3684 blob->cbData);
3685 }
3686 }
3687 }
3688 return ret;
3689}
3690
3691static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
3692 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3693 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3694{
3695 BOOL ret;
3696
3697 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
3698 pDecodePara, pvStructInfo, *pcbStructInfo);
3699
3700 __TRY
3701 {
3702 DWORD bytesNeeded;
3703
3704 if (!cbEncoded)
3705 {
3706 SetLastError(CRYPT_E_ASN1_CORRUPT);
3707 ret = FALSE;
3708 }
3709 else if (pbEncoded[0] != ASN_OCTETSTRING)
3710 {
3711 SetLastError(CRYPT_E_ASN1_BADTAG);
3712 ret = FALSE;
3713 }
3714 else if ((ret = CRYPT_AsnDecodeOctetsInternal(pbEncoded, cbEncoded,
3715 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
3716 {
3717 if (!pvStructInfo)
3718 *pcbStructInfo = bytesNeeded;
3719 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
3720 pvStructInfo, pcbStructInfo, bytesNeeded)))
3721 {
3722 CRYPT_DATA_BLOB *blob;
3723
3724 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3725 pvStructInfo = *(BYTE **)pvStructInfo;
3726 blob = (CRYPT_DATA_BLOB *)pvStructInfo;
3727 blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_DATA_BLOB);
3728 ret = CRYPT_AsnDecodeOctetsInternal(pbEncoded, cbEncoded,
3729 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
3730 &bytesNeeded, NULL);
3731 }
3732 }
3733 }
3734 __EXCEPT(1)
3735 {
3736 SetLastError(STATUS_ACCESS_VIOLATION);
3737 ret = FALSE;
3738 }
3739 __ENDTRY
3740 return ret;
3741}
3742
3743static BOOL CRYPT_AsnDecodeBitsInternal(const BYTE *pbEncoded, DWORD cbEncoded,
3744 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
3745{
3746 BOOL ret;
3747 DWORD bytesNeeded, dataLen;
3748 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
3749
3750 TRACE("(%p, %d, 0x%08x, %p, %d, %p)\n", pbEncoded, cbEncoded, dwFlags,
3751 pvStructInfo, *pcbStructInfo, pcbDecoded);
3752
3753 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
3754 {
3755 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
3756 bytesNeeded = sizeof(CRYPT_BIT_BLOB);
3757 else
3758 bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
3759 if (pcbDecoded)
3760 *pcbDecoded = 1 + lenBytes + dataLen;
3761 if (!pvStructInfo)
3762 *pcbStructInfo = bytesNeeded;
3763 else if (*pcbStructInfo < bytesNeeded)
3764 {
3765 *pcbStructInfo = bytesNeeded;
3766 SetLastError(ERROR_MORE_DATA);
3767 ret = FALSE;
3768 }
3769 else
3770 {
3771 CRYPT_BIT_BLOB *blob;
3772
3773 *pcbStructInfo = bytesNeeded;
3774 blob = (CRYPT_BIT_BLOB *)pvStructInfo;
3775 blob->cbData = dataLen - 1;
3776 blob->cUnusedBits = *(pbEncoded + 1 + lenBytes);
3777 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
3778 {
3779 blob->pbData = (BYTE *)pbEncoded + 2 + lenBytes;
3780 }
3781 else
3782 {
3783 assert(blob->pbData);
3784 if (blob->cbData)
3785 {
3786 BYTE mask = 0xff << blob->cUnusedBits;
3787
3788 memcpy(blob->pbData, pbEncoded + 2 + lenBytes,
3789 blob->cbData);
3790 blob->pbData[blob->cbData - 1] &= mask;
3791 }
3792 }
3793 }
3794 }
3795 return ret;
3796}
3797
3798static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
3799 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3800 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3801{
3802 BOOL ret;
3803
3804 TRACE("(%p, %d, 0x%08x, %p, %p, %p)\n", pbEncoded, cbEncoded, dwFlags,
3805 pDecodePara, pvStructInfo, pcbStructInfo);
3806
3807 __TRY
3808 {
3809 DWORD bytesNeeded;
3810
3811 if (!cbEncoded)
3812 {
3813 SetLastError(CRYPT_E_ASN1_CORRUPT);
3814 ret = FALSE;
3815 }
3816 else if (pbEncoded[0] != ASN_BITSTRING)
3817 {
3818 SetLastError(CRYPT_E_ASN1_BADTAG);
3819 ret = FALSE;
3820 }
3821 else if ((ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
3822 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
3823 {
3824 if (!pvStructInfo)
3825 *pcbStructInfo = bytesNeeded;
3826 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
3827 pvStructInfo, pcbStructInfo, bytesNeeded)))
3828 {
3829 CRYPT_BIT_BLOB *blob;
3830
3831 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3832 pvStructInfo = *(BYTE **)pvStructInfo;
3833 blob = (CRYPT_BIT_BLOB *)pvStructInfo;
3834 blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_BIT_BLOB);
3835 ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
3836 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
3837 &bytesNeeded, NULL);
3838 }
3839 }
3840 }
3841 __EXCEPT(1)
3842 {
3843 SetLastError(STATUS_ACCESS_VIOLATION);
3844 ret = FALSE;
3845 }
3846 __ENDTRY
3847 TRACE("returning %d (%08x)\n", ret, GetLastError());
3848 return ret;
3849}
3850
3851/* Ignores tag. Only allows integers 4 bytes or smaller in size. */
3852static BOOL CRYPT_AsnDecodeIntInternal(const BYTE *pbEncoded, DWORD cbEncoded,
3853 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
3854{
3855 BOOL ret;
3856 BYTE buf[sizeof(CRYPT_INTEGER_BLOB) + sizeof(int)];
3857 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)buf;
3858 DWORD size = sizeof(buf);
3859
3860 blob->pbData = buf + sizeof(CRYPT_INTEGER_BLOB);
3861 ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded, 0, buf,
3862 &size, pcbDecoded);
3863 if (ret)
3864 {
3865 if (!pvStructInfo)
3866 *pcbStructInfo = sizeof(int);
3867 else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo, sizeof(int))))
3868 {
3869 int val, i;
3870
3871 if (blob->pbData[blob->cbData - 1] & 0x80)
3872 {
3873 /* initialize to a negative value to sign-extend */
3874 val = -1;
3875 }
3876 else
3877 val = 0;
3878 for (i = 0; i < blob->cbData; i++)
3879 {
3880 val <<= 8;
3881 val |= blob->pbData[blob->cbData - i - 1];
3882 }
3883 memcpy(pvStructInfo, &val, sizeof(int));
3884 }
3885 }
3886 else if (GetLastError() == ERROR_MORE_DATA)
3887 SetLastError(CRYPT_E_ASN1_LARGE);
3888 return ret;
3889}
3890
3891static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
3892 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3893 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3894{
3895 BOOL ret;
3896
3897 __TRY
3898 {
3899 DWORD bytesNeeded;
3900
3901 if (!cbEncoded)
3902 {
3903 SetLastError(CRYPT_E_ASN1_EOD);
3904 ret = FALSE;
3905 }
3906 else if (pbEncoded[0] != ASN_INTEGER)
3907 {
3908 SetLastError(CRYPT_E_ASN1_BADTAG);
3909 ret = FALSE;
3910 }
3911 else
3912 ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded,
3913 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
3914 if (ret)
3915 {
3916 if (!pvStructInfo)
3917 *pcbStructInfo = bytesNeeded;
3918 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
3919 pvStructInfo, pcbStructInfo, bytesNeeded)))
3920 {
3921 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3922 pvStructInfo = *(BYTE **)pvStructInfo;
3923 ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded,
3924 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
3925 &bytesNeeded, NULL);
3926 }
3927 }
3928 }
3929 __EXCEPT(1)
3930 {
3931 SetLastError(STATUS_ACCESS_VIOLATION);
3932 ret = FALSE;
3933 }
3934 __ENDTRY
3935 return ret;
3936}
3937
3938static BOOL CRYPT_AsnDecodeIntegerInternal(const BYTE *pbEncoded,
3939 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
3940 DWORD *pcbDecoded)
3941{
3942 BOOL ret;
3943 DWORD bytesNeeded, dataLen;
3944
3945 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
3946 {
3947 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
3948
3949 bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
3950 if (pcbDecoded)
3951 *pcbDecoded = 1 + lenBytes + dataLen;
3952 if (!pvStructInfo)
3953 *pcbStructInfo = bytesNeeded;
3954 else if (*pcbStructInfo < bytesNeeded)
3955 {
3956 *pcbStructInfo = bytesNeeded;
3957 SetLastError(ERROR_MORE_DATA);
3958 ret = FALSE;
3959 }
3960 else
3961 {
3962 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
3963
3964 *pcbStructInfo = bytesNeeded;
3965 blob->cbData = dataLen;
3966 assert(blob->pbData);
3967 if (blob->cbData)
3968 {
3969 DWORD i;
3970
3971 for (i = 0; i < blob->cbData; i++)
3972 {
3973 blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
3974 dataLen - i - 1);
3975 }
3976 }
3977 }
3978 }
3979 return ret;
3980}
3981
3982static BOOL WINAPI CRYPT_AsnDecodeInteger(DWORD dwCertEncodingType,
3983 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3984 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3985{
3986 BOOL ret;
3987
3988 __TRY
3989 {
3990 DWORD bytesNeeded;
3991
3992 if (pbEncoded[0] != ASN_INTEGER)
3993 {
3994 SetLastError(CRYPT_E_ASN1_BADTAG);
3995 ret = FALSE;
3996 }
3997 else
3998 ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
3999 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
4000 if (ret)
4001 {
4002 if (!pvStructInfo)
4003 *pcbStructInfo = bytesNeeded;
4004 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
4005 pvStructInfo, pcbStructInfo, bytesNeeded)))
4006 {
4007 CRYPT_INTEGER_BLOB *blob;
4008
4009 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
4010 pvStructInfo = *(BYTE **)pvStructInfo;
4011 blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
4012 blob->pbData = (BYTE *)pvStructInfo +
4013 sizeof(CRYPT_INTEGER_BLOB);
4014 ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
4015 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, pvStructInfo,
4016 &bytesNeeded, NULL);
4017 }
4018 }
4019 }
4020 __EXCEPT(1)
4021 {
4022 SetLastError(STATUS_ACCESS_VIOLATION);
4023 ret = FALSE;
4024 }
4025 __ENDTRY
4026 return ret;
4027}
4028
4029static BOOL CRYPT_AsnDecodeUnsignedIntegerInternal(const BYTE *pbEncoded,
4030 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4031 DWORD *pcbDecoded)
4032{
4033 BOOL ret;
4034
4035 if (pbEncoded[0] == ASN_INTEGER)
4036 {
4037 DWORD bytesNeeded, dataLen;
4038
4039 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
4040 {
4041 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
4042
4043 if (pcbDecoded)
4044 *pcbDecoded = 1 + lenBytes + dataLen;
4045 bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
4046 if (!pvStructInfo)
4047 *pcbStructInfo = bytesNeeded;
4048 else if (*pcbStructInfo < bytesNeeded)
4049 {
4050 *pcbStructInfo = bytesNeeded;
4051 SetLastError(ERROR_MORE_DATA);
4052 ret = FALSE;
4053 }
4054 else
4055 {
4056 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
4057
4058 *pcbStructInfo = bytesNeeded;
4059 blob->cbData = dataLen;
4060 assert(blob->pbData);
4061 /* remove leading zero byte if it exists */
4062 if (blob->cbData && *(pbEncoded + 1 + lenBytes) == 0)
4063 {
4064 blob->cbData--;
4065 blob->pbData++;
4066 }
4067 if (blob->cbData)
4068 {
4069 DWORD i;
4070
4071 for (i = 0; i < blob->cbData; i++)
4072 {
4073 blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
4074 dataLen - i - 1);
4075 }
4076 }
4077 }
4078 }
4079 }
4080 else
4081 {
4082 SetLastError(CRYPT_E_ASN1_BADTAG);
4083 ret = FALSE;
4084 }
4085 return ret;
4086}
4087
4088static BOOL WINAPI CRYPT_AsnDecodeUnsignedInteger(DWORD dwCertEncodingType,
4089 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4090 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4091{
4092 BOOL ret;
4093
4094 __TRY
4095 {
4096 DWORD bytesNeeded;
4097
4098 if ((ret = CRYPT_AsnDecodeUnsignedIntegerInternal(pbEncoded, cbEncoded,
4099 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
4100 {
4101 if (!pvStructInfo)
4102 *pcbStructInfo = bytesNeeded;
4103 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
4104 pvStructInfo, pcbStructInfo, bytesNeeded)))
4105 {
4106 CRYPT_INTEGER_BLOB *blob;
4107
4108 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
4109 pvStructInfo = *(BYTE **)pvStructInfo;
4110 blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
4111 blob->pbData = (BYTE *)pvStructInfo +
4112 sizeof(CRYPT_INTEGER_BLOB);
4113 ret = CRYPT_AsnDecodeUnsignedIntegerInternal(pbEncoded,
4114 cbEncoded, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, pvStructInfo,
4115 &bytesNeeded, NULL);
4116 }
4117 }
4118 }
4119 __EXCEPT(1)
4120 {
4121 SetLastError(STATUS_ACCESS_VIOLATION);
4122 ret = FALSE;
4123 }
4124 __ENDTRY
4125 return ret;
4126}
4127
4128static BOOL WINAPI CRYPT_AsnDecodeEnumerated(DWORD dwCertEncodingType,
4129 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4130 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4131{
4132 BOOL ret;
4133
4134 if (!pvStructInfo)
4135 {
4136 *pcbStructInfo = sizeof(int);
4137 return TRUE;
4138 }
4139 __TRY
4140 {
4141 if (pbEncoded[0] == ASN_ENUMERATED)
4142 {
4143 unsigned int val = 0, i;
4144
4145 if (cbEncoded <= 1)
4146 {
4147 SetLastError(CRYPT_E_ASN1_EOD);
4148 ret = FALSE;
4149 }
4150 else if (pbEncoded[1] == 0)
4151 {
4152 SetLastError(CRYPT_E_ASN1_CORRUPT);
4153 ret = FALSE;
4154 }
4155 else
4156 {
4157 /* A little strange looking, but we have to accept a sign byte:
4158 * 0xffffffff gets encoded as 0a 05 00 ff ff ff ff. Also,
4159 * assuming a small length is okay here, it has to be in short
4160 * form.
4161 */
4162 if (pbEncoded[1] > sizeof(unsigned int) + 1)
4163 {
4164 SetLastError(CRYPT_E_ASN1_LARGE);
4165 return FALSE;
4166 }
4167 for (i = 0; i < pbEncoded[1]; i++)
4168 {
4169 val <<= 8;
4170 val |= pbEncoded[2 + i];
4171 }
4172 if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
4173 pvStructInfo, pcbStructInfo, sizeof(unsigned int))))
4174 {
4175 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
4176 pvStructInfo = *(BYTE **)pvStructInfo;
4177 memcpy(pvStructInfo, &val, sizeof(unsigned int));
4178 }
4179 }
4180 }
4181 else
4182 {
4183 SetLastError(CRYPT_E_ASN1_BADTAG);
4184 ret = FALSE;
4185 }
4186 }
4187 __EXCEPT(1)
4188 {
4189 SetLastError(STATUS_ACCESS_VIOLATION);
4190 ret = FALSE;
4191 }
4192 __ENDTRY
4193 return ret;
4194}
4195
4196/* Modifies word, pbEncoded, and len, and magically sets a value ret to FALSE
4197 * if it fails.
4198 */
4199#define CRYPT_TIME_GET_DIGITS(pbEncoded, len, numDigits, word) \
4200 do { \
4201 BYTE i; \
4202 \
4203 (word) = 0; \
4204 for (i = 0; (len) > 0 && i < (numDigits); i++, (len)--) \
4205 { \
4206 if (!isdigit(*(pbEncoded))) \
4207 { \
4208 SetLastError(CRYPT_E_ASN1_CORRUPT); \
4209 ret = FALSE; \
4210 } \
4211 else \
4212 { \
4213 (word) *= 10; \
4214 (word) += *(pbEncoded)++ - '0'; \
4215 } \
4216 } \
4217 } while (0)
4218
4219static BOOL CRYPT_AsnDecodeTimeZone(const BYTE *pbEncoded, DWORD len,
4220 SYSTEMTIME *sysTime)
4221{
4222 BOOL ret = TRUE;
4223
4224 if (len >= 3 && (*pbEncoded == '+' || *pbEncoded == '-'))
4225 {
4226 WORD hours, minutes = 0;
4227 BYTE sign = *pbEncoded++;
4228
4229 len--;
4230 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, hours);
4231 if (ret && hours >= 24)
4232 {
4233 SetLastError(CRYPT_E_ASN1_CORRUPT);
4234 ret = FALSE;
4235 }
4236 else if (len >= 2)
4237 {
4238 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, minutes);
4239 if (ret && minutes >= 60)
4240 {
4241 SetLastError(CRYPT_E_ASN1_CORRUPT);
4242 ret = FALSE;
4243 }
4244 }
4245 if (ret)
4246 {
4247 if (sign == '+')
4248 {
4249 sysTime->wHour += hours;
4250 sysTime->wMinute += minutes;
4251 }
4252 else
4253 {
4254 if (hours > sysTime->wHour)
4255 {
4256 sysTime->wDay--;
4257 sysTime->wHour = 24 - (hours - sysTime->wHour);
4258 }
4259 else
4260 sysTime->wHour -= hours;
4261 if (minutes > sysTime->wMinute)
4262 {
4263 sysTime->wHour--;
4264 sysTime->wMinute = 60 - (minutes - sysTime->wMinute);
4265 }
4266 else
4267 sysTime->wMinute -= minutes;
4268 }
4269 }
4270 }
4271 return ret;
4272}
4273
4274#define MIN_ENCODED_TIME_LENGTH 10
4275
4276static BOOL CRYPT_AsnDecodeUtcTimeInternal(const BYTE *pbEncoded,
4277 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4278 DWORD *pcbDecoded)
4279{
4280 BOOL ret = FALSE;
4281
4282 if (pbEncoded[0] == ASN_UTCTIME)
4283 {
4284 if (cbEncoded <= 1)
4285 SetLastError(CRYPT_E_ASN1_EOD);
4286 else if (pbEncoded[1] > 0x7f)
4287 {
4288 /* long-form date strings really can't be valid */
4289 SetLastError(CRYPT_E_ASN1_CORRUPT);
4290 }
4291 else
4292 {
4293 SYSTEMTIME sysTime = { 0 };
4294 BYTE len = pbEncoded[1];
4295
4296 if (len < MIN_ENCODED_TIME_LENGTH)
4297 SetLastError(CRYPT_E_ASN1_CORRUPT);
4298 else
4299 {
4300 ret = TRUE;
4301 if (pcbDecoded)
4302 *pcbDecoded = 2 + len;
4303 pbEncoded += 2;
4304 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wYear);
4305 if (sysTime.wYear >= 50)
4306 sysTime.wYear += 1900;
4307 else
4308 sysTime.wYear += 2000;
4309 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
4310 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
4311 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
4312 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMinute);
4313 if (ret && len > 0)
4314 {
4315 if (len >= 2 && isdigit(*pbEncoded) &&
4316 isdigit(*(pbEncoded + 1)))
4317 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
4318 sysTime.wSecond);
4319 else if (isdigit(*pbEncoded))
4320 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 1,
4321 sysTime.wSecond);
4322 if (ret)
4323 ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
4324 &sysTime);
4325 }
4326 if (ret)
4327 {
4328 if (!pvStructInfo)
4329 *pcbStructInfo = sizeof(FILETIME);
4330 else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo,
4331 sizeof(FILETIME))))
4332 ret = SystemTimeToFileTime(&sysTime,
4333 (FILETIME *)pvStructInfo);
4334 }
4335 }
4336 }
4337 }
4338 else
4339 SetLastError(CRYPT_E_ASN1_BADTAG);
4340 return ret;
4341}
4342
4343static BOOL WINAPI CRYPT_AsnDecodeUtcTime(DWORD dwCertEncodingType,
4344 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4345 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4346{
4347 BOOL ret = FALSE;
4348
4349 __TRY
4350 {
4351 DWORD bytesNeeded;
4352
4353 ret = CRYPT_AsnDecodeUtcTimeInternal(pbEncoded, cbEncoded,
4354 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
4355 if (ret)
4356 {
4357 if (!pvStructInfo)
4358 *pcbStructInfo = bytesNeeded;
4359 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
4360 pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
4361 {
4362 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
4363 pvStructInfo = *(BYTE **)pvStructInfo;
4364 ret = CRYPT_AsnDecodeUtcTimeInternal(pbEncoded, cbEncoded,
4365 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
4366 &bytesNeeded, NULL);
4367 }
4368 }
4369 }
4370 __EXCEPT(1)
4371 {
4372 SetLastError(STATUS_ACCESS_VIOLATION);
4373 }
4374 __ENDTRY
4375 return ret;
4376}
4377
4378static BOOL CRYPT_AsnDecodeGeneralizedTime(const BYTE *pbEncoded,
4379 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4380 DWORD *pcbDecoded)
4381{
4382 BOOL ret = FALSE;
4383
4384 if (pbEncoded[0] == ASN_GENERALTIME)
4385 {
4386 if (cbEncoded <= 1)
4387 SetLastError(CRYPT_E_ASN1_EOD);
4388 else if (pbEncoded[1] > 0x7f)
4389 {
4390 /* long-form date strings really can't be valid */
4391 SetLastError(CRYPT_E_ASN1_CORRUPT);
4392 }
4393 else
4394 {
4395 BYTE len = pbEncoded[1];
4396
4397 if (len < MIN_ENCODED_TIME_LENGTH)
4398 SetLastError(CRYPT_E_ASN1_CORRUPT);
4399 else
4400 {
4401 SYSTEMTIME sysTime = { 0 };
4402
4403 ret = TRUE;
4404 if (pcbDecoded)
4405 *pcbDecoded = 2 + len;
4406 pbEncoded += 2;
4407 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 4, sysTime.wYear);
4408 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
4409 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
4410 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
4411 if (ret && len > 0)
4412 {
4413 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
4414 sysTime.wMinute);
4415 if (ret && len > 0)
4416 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
4417 sysTime.wSecond);
4418 if (ret && len > 0 && (*pbEncoded == '.' ||
4419 *pbEncoded == ','))
4420 {
4421 BYTE digits;
4422
4423 pbEncoded++;
4424 len--;
4425 /* workaround macro weirdness */
4426 digits = min(len, 3);
4427 CRYPT_TIME_GET_DIGITS(pbEncoded, len, digits,
4428 sysTime.wMilliseconds);
4429 }
4430 if (ret)
4431 ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
4432 &sysTime);
4433 }
4434 if (ret)
4435 {
4436 if (!pvStructInfo)
4437 *pcbStructInfo = sizeof(FILETIME);
4438 else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo,
4439 sizeof(FILETIME))))
4440 ret = SystemTimeToFileTime(&sysTime,
4441 (FILETIME *)pvStructInfo);
4442 }
4443 }
4444 }
4445 }
4446 else
4447 SetLastError(CRYPT_E_ASN1_BADTAG);
4448 return ret;
4449}
4450
4451static BOOL CRYPT_AsnDecodeChoiceOfTimeInternal(const BYTE *pbEncoded,
4452 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4453 DWORD *pcbDecoded)
4454{
4455 BOOL ret;
4456 InternalDecodeFunc decode = NULL;
4457
4458 if (pbEncoded[0] == ASN_UTCTIME)
4459 decode = CRYPT_AsnDecodeUtcTimeInternal;
4460 else if (pbEncoded[0] == ASN_GENERALTIME)
4461 decode = CRYPT_AsnDecodeGeneralizedTime;
4462 if (decode)
4463 ret = decode(pbEncoded, cbEncoded, dwFlags, pvStructInfo,
4464 pcbStructInfo, pcbDecoded);
4465 else
4466 {
4467 SetLastError(CRYPT_E_ASN1_BADTAG);
4468 ret = FALSE;
4469 }
4470 return ret;
4471}
4472
4473static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
4474 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4475 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4476{
4477 BOOL ret;
4478
4479 __TRY
4480 {
4481 DWORD bytesNeeded;
4482
4483 ret = CRYPT_AsnDecodeChoiceOfTimeInternal(pbEncoded, cbEncoded,
4484 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
4485 if (ret)
4486 {
4487 if (!pvStructInfo)
4488 *pcbStructInfo = bytesNeeded;
4489 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
4490 pvStructInfo, pcbStructInfo, bytesNeeded)))
4491 {
4492 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
4493 pvStructInfo = *(BYTE **)pvStructInfo;
4494 ret = CRYPT_AsnDecodeChoiceOfTimeInternal(pbEncoded, cbEncoded,
4495 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
4496 &bytesNeeded, NULL);
4497 }
4498 }
4499 }
4500 __EXCEPT(1)
4501 {
4502 SetLastError(STATUS_ACCESS_VIOLATION);
4503 ret = FALSE;
4504 }
4505 __ENDTRY
4506 return ret;
4507}
4508
4509static BOOL WINAPI CRYPT_AsnDecodeSequenceOfAny(DWORD dwCertEncodingType,
4510 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4511 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4512{
4513 BOOL ret = TRUE;
4514
4515 __TRY
4516 {
4517 if (pbEncoded[0] == ASN_SEQUENCEOF)
4518 {
4519 DWORD bytesNeeded, dataLen, remainingLen, cValue;
4520
4521 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
4522 {
4523 BYTE lenBytes;
4524 const BYTE *ptr;
4525
4526 lenBytes = GET_LEN_BYTES(pbEncoded[1]);
4527 bytesNeeded = sizeof(CRYPT_SEQUENCE_OF_ANY);
4528 cValue = 0;
4529 ptr = pbEncoded + 1 + lenBytes;
4530 remainingLen = dataLen;
4531 while (ret && remainingLen)
4532 {
4533 DWORD nextLen;
4534
4535 ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
4536 if (ret)
4537 {
4538 DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
4539
4540 remainingLen -= 1 + nextLenBytes + nextLen;
4541 ptr += 1 + nextLenBytes + nextLen;
4542 bytesNeeded += sizeof(CRYPT_DER_BLOB);
4543 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
4544 bytesNeeded += 1 + nextLenBytes + nextLen;
4545 cValue++;
4546 }
4547 }
4548 if (ret)
4549 {
4550 CRYPT_SEQUENCE_OF_ANY *seq;
4551 BYTE *nextPtr;
4552 DWORD i;
4553
4554 if (!pvStructInfo)
4555 *pcbStructInfo = bytesNeeded;
4556 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
4557 pvStructInfo, pcbStructInfo, bytesNeeded)))
4558 {
4559 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
4560 pvStructInfo = *(BYTE **)pvStructInfo;
4561 seq = (CRYPT_SEQUENCE_OF_ANY *)pvStructInfo;
4562 seq->cValue = cValue;
4563 seq->rgValue = (CRYPT_DER_BLOB *)((BYTE *)seq +
4564 sizeof(*seq));
4565 nextPtr = (BYTE *)seq->rgValue +
4566 cValue * sizeof(CRYPT_DER_BLOB);
4567 ptr = pbEncoded + 1 + lenBytes;
4568 remainingLen = dataLen;
4569 i = 0;
4570 while (ret && remainingLen)
4571 {
4572 DWORD nextLen;
4573
4574 ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
4575 if (ret)
4576 {
4577 DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
4578
4579 seq->rgValue[i].cbData = 1 + nextLenBytes +
4580 nextLen;
4581 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
4582 seq->rgValue[i].pbData = (BYTE *)ptr;
4583 else
4584 {
4585 seq->rgValue[i].pbData = nextPtr;
4586 memcpy(nextPtr, ptr, 1 + nextLenBytes +
4587 nextLen);
4588 nextPtr += 1 + nextLenBytes + nextLen;
4589 }
4590 remainingLen -= 1 + nextLenBytes + nextLen;
4591 ptr += 1 + nextLenBytes + nextLen;
4592 i++;
4593 }
4594 }
4595 }
4596 }
4597 }
4598 }
4599 else
4600 {
4601 SetLastError(CRYPT_E_ASN1_BADTAG);
4602 ret = FALSE;
4603 }
4604 }
4605 __EXCEPT(1)
4606 {
4607 SetLastError(STATUS_ACCESS_VIOLATION);
4608 ret = FALSE;
4609 }
4610 __ENDTRY
4611 return ret;
4612}
4613
4614static BOOL CRYPT_AsnDecodeDistPointName(const BYTE *pbEncoded,
4615 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4616 DWORD *pcbDecoded)
4617{
4618 BOOL ret;
4619
4620 if (pbEncoded[0] == (ASN_CONTEXT | ASN_CONSTRUCTOR | 0))
4621 {
4622 DWORD bytesNeeded, dataLen;
4623
4624 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
4625 {
4626 struct AsnArrayDescriptor arrayDesc = {
4627 ASN_CONTEXT | ASN_CONSTRUCTOR | 0, CRYPT_AsnDecodeAltNameEntry,
4628 sizeof(CERT_ALT_NAME_ENTRY), TRUE,
4629 offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
4630 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
4631 DWORD nameLen;
4632
4633 if (dataLen)
4634 {
4635 ret = CRYPT_AsnDecodeArray(&arrayDesc,
4636 pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
4637 0, NULL, NULL, &nameLen, NULL, NULL);
4638 /* The CERT_ALT_NAME_INFO's size is included by CRYPT_AsnDecodeArray
4639 * as the sizeof(struct GenericArray), so don't include it in the
4640 * total bytes needed.
4641 */
4642 bytesNeeded = sizeof(CRL_DIST_POINT_NAME) + nameLen -
4643 sizeof(CERT_ALT_NAME_INFO);
4644 }
4645 else
4646 bytesNeeded = sizeof(CRL_DIST_POINT_NAME);
4647 if (pcbDecoded)
4648 *pcbDecoded = 1 + lenBytes + dataLen;
4649 if (!pvStructInfo)
4650 *pcbStructInfo = bytesNeeded;
4651 else if (*pcbStructInfo < bytesNeeded)
4652 {
4653 *pcbStructInfo = bytesNeeded;
4654 SetLastError(ERROR_MORE_DATA);
4655 ret = FALSE;
4656 }
4657 else
4658 {
4659 CRL_DIST_POINT_NAME *name = (CRL_DIST_POINT_NAME *)pvStructInfo;
4660
4661 *pcbStructInfo = bytesNeeded;
4662 if (dataLen)
4663 {
4664 name->dwDistPointNameChoice = CRL_DIST_POINT_FULL_NAME;
4665 ret = CRYPT_AsnDecodeArray(&arrayDesc,
4666 pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
4667 0, NULL, &name->u.FullName, &nameLen, NULL,
4668 name->u.FullName.rgAltEntry);
4669 }
4670 else
4671 name->dwDistPointNameChoice = CRL_DIST_POINT_NO_NAME;
4672 }
4673 }
4674 }
4675 else
4676 {
4677 SetLastError(CRYPT_E_ASN1_BADTAG);
4678 ret = FALSE;
4679 }
4680 return ret;
4681}
4682
4683static BOOL CRYPT_AsnDecodeDistPoint(const BYTE *pbEncoded, DWORD cbEncoded,
4684 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
4685{
4686 struct AsnDecodeSequenceItem items[] = {
4687 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_DIST_POINT,
4688 DistPointName), CRYPT_AsnDecodeDistPointName,
4689 sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE, offsetof(CRL_DIST_POINT,
4690 DistPointName.u.FullName.rgAltEntry), 0 },
4691 { ASN_CONTEXT | 1, offsetof(CRL_DIST_POINT, ReasonFlags),
4692 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
4693 offsetof(CRL_DIST_POINT, ReasonFlags.pbData), 0 },
4694 { ASN_CONTEXT | ASN_CONSTRUCTOR | 2, offsetof(CRL_DIST_POINT, CRLIssuer),
4695 CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE, TRUE,
4696 offsetof(CRL_DIST_POINT, CRLIssuer.rgAltEntry), 0 },
4697 };
4698 CRL_DIST_POINT *point = (CRL_DIST_POINT *)pvStructInfo;
4699 BOOL ret;
4700
4701 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
4702 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
4703 pcbDecoded, point ? point->DistPointName.u.FullName.rgAltEntry : NULL);
4704 return ret;
4705}
4706
4707static BOOL WINAPI CRYPT_AsnDecodeCRLDistPoints(DWORD dwCertEncodingType,
4708 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4709 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4710{
4711 BOOL ret;
4712
4713 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
4714 pDecodePara, pvStructInfo, *pcbStructInfo);
4715
4716 __TRY
4717 {
4718 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
4719 CRYPT_AsnDecodeDistPoint, sizeof(CRL_DIST_POINT), TRUE,
4720 offsetof(CRL_DIST_POINT, DistPointName.u.FullName.rgAltEntry) };
4721
4722 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
4723 pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
4724 }
4725 __EXCEPT(1)
4726 {
4727 SetLastError(STATUS_ACCESS_VIOLATION);
4728 ret = FALSE;
4729 }
4730 __ENDTRY
4731 return ret;
4732}
4733
4734static BOOL WINAPI CRYPT_AsnDecodeEnhancedKeyUsage(DWORD dwCertEncodingType,
4735 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4736 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4737{
4738 BOOL ret;
4739
4740 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
4741 pDecodePara, pvStructInfo, *pcbStructInfo);
4742
4743 __TRY
4744 {
4745 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
4746 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
4747
4748 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
4749 pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
4750 }
4751 __EXCEPT(1)
4752 {
4753 SetLastError(STATUS_ACCESS_VIOLATION);
4754 ret = FALSE;
4755 }
4756 __ENDTRY
4757 return ret;
4758}
4759
4760static BOOL WINAPI CRYPT_AsnDecodeIssuingDistPoint(DWORD dwCertEncodingType,
4761 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4762 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4763{
4764 BOOL ret;
4765
4766 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
4767 pDecodePara, pvStructInfo, *pcbStructInfo);
4768
4769 __TRY
4770 {
4771 struct AsnDecodeSequenceItem items[] = {
4772 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_ISSUING_DIST_POINT,
4773 DistPointName), CRYPT_AsnDecodeDistPointName,
4774 sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE,
4775 offsetof(CRL_ISSUING_DIST_POINT,
4776 DistPointName.u.FullName.rgAltEntry), 0 },
4777 { ASN_CONTEXT | 1, offsetof(CRL_ISSUING_DIST_POINT,
4778 fOnlyContainsUserCerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
4779 FALSE, 0 },
4780 { ASN_CONTEXT | 2, offsetof(CRL_ISSUING_DIST_POINT,
4781 fOnlyContainsCACerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
4782 FALSE, 0 },
4783 { ASN_CONTEXT | 3, offsetof(CRL_ISSUING_DIST_POINT,
4784 OnlySomeReasonFlags), CRYPT_AsnDecodeBitsInternal,
4785 sizeof(CRYPT_BIT_BLOB), TRUE, TRUE, offsetof(CRL_ISSUING_DIST_POINT,
4786 OnlySomeReasonFlags.pbData), 0 },
4787 { ASN_CONTEXT | 4, offsetof(CRL_ISSUING_DIST_POINT,
4788 fIndirectCRL), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0 },
4789 };
4790
4791 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
4792 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
4793 pcbStructInfo, NULL, NULL);
4794 }
4795 __EXCEPT(1)
4796 {
4797 SetLastError(STATUS_ACCESS_VIOLATION);
4798 ret = FALSE;
4799 }
4800 __ENDTRY
4801 return ret;
4802}
4803
4804static BOOL CRYPT_AsnDecodeMaximum(const BYTE *pbEncoded,
4805 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4806 DWORD *pcbDecoded)
4807{
4808 BOOL ret = FALSE;
4809
4810 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
4811 pvStructInfo, *pcbStructInfo, pcbDecoded);
4812
4813 if (!cbEncoded)
4814 {
4815 SetLastError(CRYPT_E_ASN1_EOD);
4816 return FALSE;
4817 }
4818 if (pbEncoded[0] != (ASN_CONTEXT | 1))
4819 {
4820 SetLastError(CRYPT_E_ASN1_BADTAG);
4821 return FALSE;
4822 }
4823 /* The BOOL is implicit: if the integer is present, then it's TRUE */
4824 ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
4825 pvStructInfo ? (BYTE *)pvStructInfo + sizeof(BOOL) : NULL, pcbStructInfo,
4826 pcbDecoded);
4827 if (ret && pvStructInfo)
4828 *(BOOL *)pvStructInfo = TRUE;
4829 TRACE("returning %d\n", ret);
4830 return ret;
4831}
4832
4833static BOOL CRYPT_AsnDecodeSubtree(const BYTE *pbEncoded,
4834 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4835 DWORD *pcbDecoded)
4836{
4837 BOOL ret;
4838 struct AsnDecodeSequenceItem items[] = {
4839 { 0, offsetof(CERT_GENERAL_SUBTREE, Base),
4840 CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE, TRUE,
4841 offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL), 0 },
4842 { ASN_CONTEXT | 0, offsetof(CERT_GENERAL_SUBTREE, dwMinimum),
4843 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
4844 { ASN_CONTEXT | 1, offsetof(CERT_GENERAL_SUBTREE, fMaximum),
4845 CRYPT_AsnDecodeMaximum, sizeof(BOOL) + sizeof(DWORD), TRUE, FALSE, 0,
4846 0 },
4847 };
4848 CERT_GENERAL_SUBTREE *subtree = (CERT_GENERAL_SUBTREE *)pvStructInfo;
4849
4850 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
4851 pvStructInfo, *pcbStructInfo, pcbDecoded);
4852
4853 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
4854 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
4855 pcbDecoded, subtree ? (BYTE *)subtree->Base.u.pwszURL : NULL);
4856 if (pcbDecoded)
4857 {
4858 TRACE("%d\n", *pcbDecoded);
4859 if (*pcbDecoded < cbEncoded)
4860 TRACE("%02x %02x\n", *(pbEncoded + *pcbDecoded),
4861 *(pbEncoded + *pcbDecoded + 1));
4862 }
4863 TRACE("returning %d\n", ret);
4864 return ret;
4865}
4866
4867static BOOL CRYPT_AsnDecodeSubtreeArray(const BYTE *pbEncoded,
4868 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4869 DWORD *pcbDecoded)
4870{
4871 BOOL ret = TRUE;
4872 struct AsnArrayDescriptor arrayDesc = { 0,
4873 CRYPT_AsnDecodeSubtree, sizeof(CERT_GENERAL_SUBTREE), TRUE,
4874 offsetof(CERT_GENERAL_SUBTREE, Base.u.pwszURL) };
4875 struct GenericArray *array = (struct GenericArray *)pvStructInfo;
4876
4877 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
4878 pvStructInfo, *pcbStructInfo, pcbDecoded);
4879
4880 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
4881 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
4882 array ? array->rgItems : NULL);
4883 return ret;
4884}
4885
4886
4887static BOOL WINAPI CRYPT_AsnDecodeNameConstraints(DWORD dwCertEncodingType,
4888 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4889 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4890{
4891 BOOL ret = FALSE;
4892
4893 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
4894 pDecodePara, pvStructInfo, *pcbStructInfo);
4895
4896 __TRY
4897 {
4898 struct AsnDecodeSequenceItem items[] = {
4899 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
4900 offsetof(CERT_NAME_CONSTRAINTS_INFO, cPermittedSubtree),
4901 CRYPT_AsnDecodeSubtreeArray, sizeof(struct GenericArray), TRUE, TRUE,
4902 offsetof(CERT_NAME_CONSTRAINTS_INFO, rgPermittedSubtree), 0 },
4903 { ASN_CONTEXT | ASN_CONSTRUCTOR | 1,
4904 offsetof(CERT_NAME_CONSTRAINTS_INFO, cExcludedSubtree),
4905 CRYPT_AsnDecodeSubtreeArray, sizeof(struct GenericArray), TRUE, TRUE,
4906 offsetof(CERT_NAME_CONSTRAINTS_INFO, rgExcludedSubtree), 0 },
4907 };
4908
4909 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
4910 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
4911 pcbStructInfo, NULL, NULL);
4912 }
4913 __EXCEPT(1)
4914 {
4915 SetLastError(STATUS_ACCESS_VIOLATION);
4916 }
4917 __ENDTRY
4918 return ret;
4919}
4920
4921static BOOL CRYPT_AsnDecodeIssuerSerialNumber(const BYTE *pbEncoded,
4922 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4923 DWORD *pcbDecoded)
4924{
4925 BOOL ret;
4926 struct AsnDecodeSequenceItem items[] = {
4927 { 0, offsetof(CERT_ISSUER_SERIAL_NUMBER, Issuer), CRYPT_AsnDecodeDerBlob,
4928 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_ISSUER_SERIAL_NUMBER,
4929 Issuer.pbData) },
4930 { ASN_INTEGER, offsetof(CERT_ISSUER_SERIAL_NUMBER, SerialNumber),
4931 CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
4932 TRUE, offsetof(CERT_ISSUER_SERIAL_NUMBER, SerialNumber.pbData), 0 },
4933 };
4934 CERT_ISSUER_SERIAL_NUMBER *issuerSerial =
4935 (CERT_ISSUER_SERIAL_NUMBER *)pvStructInfo;
4936
4937 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
4938 pvStructInfo, *pcbStructInfo, pcbDecoded);
4939
4940 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
4941 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
4942 pcbDecoded, issuerSerial ? issuerSerial->Issuer.pbData : NULL);
4943 if (ret && issuerSerial && !issuerSerial->SerialNumber.cbData)
4944 {
4945 SetLastError(CRYPT_E_ASN1_CORRUPT);
4946 ret = FALSE;
4947 }
4948 TRACE("returning %d\n", ret);
4949 return ret;
4950}
4951
4952static BOOL CRYPT_AsnDecodePKCSSignerInfoInternal(const BYTE *pbEncoded,
4953 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
4954 DWORD *pcbDecoded)
4955{
4956 CMSG_SIGNER_INFO *info = (CMSG_SIGNER_INFO *)pvStructInfo;
4957 struct AsnDecodeSequenceItem items[] = {
4958 { ASN_INTEGER, offsetof(CMSG_SIGNER_INFO, dwVersion),
4959 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
4960 { ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, Issuer),
4961 CRYPT_AsnDecodeIssuerSerialNumber, sizeof(CERT_ISSUER_SERIAL_NUMBER),
4962 FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, Issuer.pbData), 0 },
4963 { ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, HashAlgorithm),
4964 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
4965 FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, HashAlgorithm.pszObjId), 0 },
4966 { ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
4967 offsetof(CMSG_SIGNER_INFO, AuthAttrs),
4968 CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
4969 TRUE, TRUE, offsetof(CMSG_SIGNER_INFO, AuthAttrs.rgAttr), 0 },
4970 { ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, HashEncryptionAlgorithm),
4971 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
4972 FALSE, TRUE, offsetof(CMSG_SIGNER_INFO,
4973 HashEncryptionAlgorithm.pszObjId), 0 },
4974 { ASN_OCTETSTRING, offsetof(CMSG_SIGNER_INFO, EncryptedHash),
4975 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DER_BLOB),
4976 FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, EncryptedHash.pbData), 0 },
4977 { ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
4978 offsetof(CMSG_SIGNER_INFO, UnauthAttrs),
4979 CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
4980 TRUE, TRUE, offsetof(CMSG_SIGNER_INFO, UnauthAttrs.rgAttr), 0 },
4981 };
4982 BOOL ret;
4983
4984 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
4985 pvStructInfo, *pcbStructInfo);
4986
4987 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
4988 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
4989 pcbDecoded, info ? info->Issuer.pbData : NULL);
4990 return ret;
4991}
4992
4993static BOOL WINAPI CRYPT_AsnDecodePKCSSignerInfo(DWORD dwCertEncodingType,
4994 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
4995 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
4996{
4997 BOOL ret = FALSE;
4998
4999 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
5000 pDecodePara, pvStructInfo, *pcbStructInfo);
5001
5002 __TRY
5003 {
5004 ret = CRYPT_AsnDecodePKCSSignerInfoInternal(pbEncoded, cbEncoded,
5005 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
5006 if (ret && pvStructInfo)
5007 {
5008 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
5009 pcbStructInfo, *pcbStructInfo);
5010 if (ret)
5011 {
5012 CMSG_SIGNER_INFO *info;
5013
5014 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
5015 pvStructInfo = *(BYTE **)pvStructInfo;
5016 info = (CMSG_SIGNER_INFO *)pvStructInfo;
5017 info->Issuer.pbData = ((BYTE *)info +
5018 sizeof(CMSG_SIGNER_INFO));
5019 ret = CRYPT_AsnDecodePKCSSignerInfoInternal(pbEncoded,
5020 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
5021 pcbStructInfo, NULL);
5022 }
5023 }
5024 }
5025 __EXCEPT(1)
5026 {
5027 SetLastError(STATUS_ACCESS_VIOLATION);
5028 }
5029 __ENDTRY
5030 TRACE("returning %d\n", ret);
5031 return ret;
5032}
5033
5034static BOOL CRYPT_AsnDecodeCMSSignerId(const BYTE *pbEncoded,
5035 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
5036 DWORD *pcbDecoded)
5037{
5038 CERT_ID *id = (CERT_ID *)pvStructInfo;
5039 BOOL ret = FALSE;
5040
5041 if (*pbEncoded == ASN_SEQUENCEOF)
5042 {
5043 ret = CRYPT_AsnDecodeIssuerSerialNumber(pbEncoded, cbEncoded, dwFlags,
5044 id ? &id->u.IssuerSerialNumber : NULL, pcbStructInfo, pcbDecoded);
5045 if (ret)
5046 {
5047 if (id)
5048 id->dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
5049 if (*pcbStructInfo > sizeof(CERT_ISSUER_SERIAL_NUMBER))
5050 *pcbStructInfo = sizeof(CERT_ID) + *pcbStructInfo -
5051 sizeof(CERT_ISSUER_SERIAL_NUMBER);
5052 else
5053 *pcbStructInfo = sizeof(CERT_ID);
5054 }
5055 }
5056 else if (*pbEncoded == (ASN_CONTEXT | 0))
5057 {
5058 ret = CRYPT_AsnDecodeOctetsInternal(pbEncoded, cbEncoded, dwFlags,
5059 id ? &id->u.KeyId : NULL, pcbStructInfo, pcbDecoded);
5060 if (ret)
5061 {
5062 if (id)
5063 id->dwIdChoice = CERT_ID_KEY_IDENTIFIER;
5064 if (*pcbStructInfo > sizeof(CRYPT_DATA_BLOB))
5065 *pcbStructInfo = sizeof(CERT_ID) + *pcbStructInfo -
5066 sizeof(CRYPT_DATA_BLOB);
5067 else
5068 *pcbStructInfo = sizeof(CERT_ID);
5069 }
5070 }
5071 else
5072 SetLastError(CRYPT_E_ASN1_BADTAG);
5073 return ret;
5074}
5075
5076static BOOL CRYPT_AsnDecodeCMSSignerInfoInternal(const BYTE *pbEncoded,
5077 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
5078 DWORD *pcbDecoded)
5079{
5080 CMSG_CMS_SIGNER_INFO *info = (CMSG_CMS_SIGNER_INFO *)pvStructInfo;
5081 struct AsnDecodeSequenceItem items[] = {
5082 { ASN_INTEGER, offsetof(CMSG_CMS_SIGNER_INFO, dwVersion),
5083 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
5084 { 0, offsetof(CMSG_CMS_SIGNER_INFO, SignerId),
5085 CRYPT_AsnDecodeCMSSignerId, sizeof(CERT_ID), FALSE, TRUE,
5086 offsetof(CMSG_CMS_SIGNER_INFO, SignerId.u.KeyId.pbData), 0 },
5087 { ASN_SEQUENCEOF, offsetof(CMSG_CMS_SIGNER_INFO, HashAlgorithm),
5088 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
5089 FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, HashAlgorithm.pszObjId), 0 },
5090 { ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
5091 offsetof(CMSG_CMS_SIGNER_INFO, AuthAttrs),
5092 CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
5093 TRUE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, AuthAttrs.rgAttr), 0 },
5094 { ASN_SEQUENCEOF, offsetof(CMSG_CMS_SIGNER_INFO, HashEncryptionAlgorithm),
5095 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
5096 FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO,
5097 HashEncryptionAlgorithm.pszObjId), 0 },
5098 { ASN_OCTETSTRING, offsetof(CMSG_CMS_SIGNER_INFO, EncryptedHash),
5099 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DER_BLOB),
5100 FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, EncryptedHash.pbData), 0 },
5101 { ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
5102 offsetof(CMSG_CMS_SIGNER_INFO, UnauthAttrs),
5103 CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
5104 TRUE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, UnauthAttrs.rgAttr), 0 },
5105 };
5106 BOOL ret;
5107
5108 TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
5109 pvStructInfo, *pcbStructInfo);
5110
5111 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
5112 pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
5113 pcbDecoded, info ? info->SignerId.u.KeyId.pbData : NULL);
5114 return ret;
5115}
5116
5117static BOOL WINAPI CRYPT_AsnDecodeCMSSignerInfo(DWORD dwCertEncodingType,
5118 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
5119 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
5120{
5121 BOOL ret = FALSE;
5122
5123 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
5124 pDecodePara, pvStructInfo, *pcbStructInfo);
5125
5126 __TRY
5127 {
5128 ret = CRYPT_AsnDecodeCMSSignerInfoInternal(pbEncoded, cbEncoded,
5129 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
5130 if (ret && pvStructInfo)
5131 {
5132 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
5133 pcbStructInfo, *pcbStructInfo);
5134 if (ret)
5135 {
5136 CMSG_CMS_SIGNER_INFO *info;
5137
5138 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
5139 pvStructInfo = *(BYTE **)pvStructInfo;
5140 info = (CMSG_CMS_SIGNER_INFO *)pvStructInfo;
5141 info->SignerId.u.KeyId.pbData = ((BYTE *)info +
5142 sizeof(CMSG_CMS_SIGNER_INFO));
5143 ret = CRYPT_AsnDecodeCMSSignerInfoInternal(pbEncoded,
5144 cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
5145 pcbStructInfo, NULL);
5146 }
5147 }
5148 }
5149 __EXCEPT(1)
5150 {
5151 SetLastError(STATUS_ACCESS_VIOLATION);
5152 }
5153 __ENDTRY
5154 TRACE("returning %d\n", ret);
5155 return ret;
5156}
5157
5158static BOOL CRYPT_DecodeSignerArray(const BYTE *pbEncoded, DWORD cbEncoded,
5159 DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
5160{
5161 BOOL ret;
5162 struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
5163 CRYPT_AsnDecodeCMSSignerInfoInternal, sizeof(CMSG_CMS_SIGNER_INFO), TRUE,
5164 offsetof(CMSG_CMS_SIGNER_INFO, SignerId.u.KeyId.pbData) };
5165 struct GenericArray *array = (struct GenericArray *)pvStructInfo;
5166
5167 TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
5168 pvStructInfo, *pcbStructInfo, pcbDecoded);
5169
5170 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
5171 NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
5172 array ? array->rgItems : NULL);
5173 return ret;
5174}
5175
5176BOOL CRYPT_AsnDecodeCMSSignedInfo(const BYTE *pbEncoded, DWORD cbEncoded,
5177 DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
5178 CRYPT_SIGNED_INFO *signedInfo, DWORD *pcbSignedInfo)
5179{
5180 BOOL ret = FALSE;
5181 struct AsnDecodeSequenceItem items[] = {
5182 { ASN_INTEGER, offsetof(CRYPT_SIGNED_INFO, version),
5183 CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
5184 /* Placeholder for the hash algorithms - redundant with those in the
5185 * signers, so just ignore them.
5186 */
5187 { ASN_CONSTRUCTOR | ASN_SETOF, 0, NULL, 0, TRUE, FALSE, 0, 0 },
5188 { ASN_SEQUENCE, offsetof(CRYPT_SIGNED_INFO, content),
5189 CRYPT_AsnDecodePKCSContentInfoInternal, sizeof(CRYPT_CONTENT_INFO),
5190 FALSE, TRUE, offsetof(CRYPT_SIGNED_INFO, content.pszObjId), 0 },
5191 { ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
5192 offsetof(CRYPT_SIGNED_INFO, cCertEncoded),
5193 CRYPT_DecodeDERArray, sizeof(struct GenericArray), TRUE, TRUE,
5194 offsetof(CRYPT_SIGNED_INFO, rgCertEncoded), 0 },
5195 { ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
5196 offsetof(CRYPT_SIGNED_INFO, cCrlEncoded), CRYPT_DecodeDERArray,
5197 sizeof(struct GenericArray), TRUE, TRUE,
5198 offsetof(CRYPT_SIGNED_INFO, rgCrlEncoded), 0 },
5199 { ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_SIGNED_INFO, cSignerInfo),
5200 CRYPT_DecodeSignerArray, sizeof(struct GenericArray), TRUE, TRUE,
5201 offsetof(CRYPT_SIGNED_INFO, rgSignerInfo), 0 },
5202 };
5203
5204 TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
5205 pDecodePara, signedInfo, *pcbSignedInfo);
5206
5207 ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
5208 pbEncoded, cbEncoded, dwFlags, pDecodePara, signedInfo, pcbSignedInfo,
5209 NULL, NULL);
5210 TRACE("returning %d\n", ret);
5211 return ret;
5212}
5213
5214static CryptDecodeObjectExFunc CRYPT_GetBuiltinDecoder(DWORD dwCertEncodingType,
5215 LPCSTR lpszStructType)
5216{
5217 CryptDecodeObjectExFunc decodeFunc = NULL;
5218
5219 if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
5220 && (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
5221 {
5222 SetLastError(ERROR_FILE_NOT_FOUND);
5223 return NULL;
5224 }
5225 if (!HIWORD(lpszStructType))
5226 {
5227 switch (LOWORD(lpszStructType))
5228 {
5229 case LOWORD(X509_CERT):
5230 decodeFunc = CRYPT_AsnDecodeCertSignedContent;
5231 break;
5232 case LOWORD(X509_CERT_TO_BE_SIGNED):
5233 decodeFunc = CRYPT_AsnDecodeCert;
5234 break;
5235 case LOWORD(X509_CERT_CRL_TO_BE_SIGNED):
5236 decodeFunc = CRYPT_AsnDecodeCRL;
5237 break;
5238 case LOWORD(X509_EXTENSIONS):
5239 decodeFunc = CRYPT_AsnDecodeExtensions;
5240 break;
5241 case LOWORD(X509_NAME_VALUE):
5242 decodeFunc = CRYPT_AsnDecodeNameValue;
5243 break;
5244 case LOWORD(X509_NAME):
5245 decodeFunc = CRYPT_AsnDecodeName;
5246 break;
5247 case LOWORD(X509_PUBLIC_KEY_INFO):
5248 decodeFunc = CRYPT_AsnDecodePubKeyInfo;
5249 break;
5250 case LOWORD(X509_AUTHORITY_KEY_ID):
5251 decodeFunc = CRYPT_AsnDecodeAuthorityKeyId;
5252 break;
5253 case LOWORD(X509_ALTERNATE_NAME):
5254 decodeFunc = CRYPT_AsnDecodeAltName;
5255 break;
5256 case LOWORD(X509_BASIC_CONSTRAINTS):
5257 decodeFunc = CRYPT_AsnDecodeBasicConstraints;
5258 break;
5259 case LOWORD(X509_BASIC_CONSTRAINTS2):
5260 decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
5261 break;
5262 case LOWORD(X509_CERT_POLICIES):
5263 decodeFunc = CRYPT_AsnDecodeCertPolicies;
5264 break;
5265 case LOWORD(RSA_CSP_PUBLICKEYBLOB):
5266 decodeFunc = CRYPT_AsnDecodeRsaPubKey;
5267 break;
5268 case LOWORD(X509_UNICODE_NAME):
5269 decodeFunc = CRYPT_AsnDecodeUnicodeName;
5270 break;
5271 case LOWORD(PKCS_ATTRIBUTE):
5272 decodeFunc = CRYPT_AsnDecodePKCSAttribute;
5273 break;
5274 case LOWORD(X509_UNICODE_NAME_VALUE):
5275 decodeFunc = CRYPT_AsnDecodeUnicodeNameValue;
5276 break;
5277 case LOWORD(X509_OCTET_STRING):
5278 decodeFunc = CRYPT_AsnDecodeOctets;
5279 break;
5280 case LOWORD(X509_BITS):
5281 case LOWORD(X509_KEY_USAGE):
5282 decodeFunc = CRYPT_AsnDecodeBits;
5283 break;
5284 case LOWORD(X509_INTEGER):
5285 decodeFunc = CRYPT_AsnDecodeInt;
5286 break;
5287 case LOWORD(X509_MULTI_BYTE_INTEGER):
5288 decodeFunc = CRYPT_AsnDecodeInteger;
5289 break;
5290 case LOWORD(X509_MULTI_BYTE_UINT):
5291 decodeFunc = CRYPT_AsnDecodeUnsignedInteger;
5292 break;
5293 case LOWORD(X509_ENUMERATED):
5294 decodeFunc = CRYPT_AsnDecodeEnumerated;
5295 break;
5296 case LOWORD(X509_CHOICE_OF_TIME):
5297 decodeFunc = CRYPT_AsnDecodeChoiceOfTime;
5298 break;
5299 case LOWORD(X509_AUTHORITY_KEY_ID2):
5300 decodeFunc = CRYPT_AsnDecodeAuthorityKeyId2;
5301 break;
5302 case LOWORD(X509_AUTHORITY_INFO_ACCESS):
5303 decodeFunc = CRYPT_AsnDecodeAuthorityInfoAccess;
5304 break;
5305 case LOWORD(PKCS_CONTENT_INFO):
5306 decodeFunc = CRYPT_AsnDecodePKCSContentInfo;
5307 break;
5308 case LOWORD(X509_SEQUENCE_OF_ANY):
5309 decodeFunc = CRYPT_AsnDecodeSequenceOfAny;
5310 break;
5311 case LOWORD(PKCS_UTC_TIME):
5312 decodeFunc = CRYPT_AsnDecodeUtcTime;
5313 break;
5314 case LOWORD(X509_CRL_DIST_POINTS):
5315 decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
5316 break;
5317 case LOWORD(X509_ENHANCED_KEY_USAGE):
5318 decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
5319 break;
5320 case LOWORD(PKCS_CTL):
5321 decodeFunc = CRYPT_AsnDecodeCTL;
5322 break;
5323 case LOWORD(PKCS_SMIME_CAPABILITIES):
5324 decodeFunc = CRYPT_AsnDecodeSMIMECapabilities;
5325 break;
5326 case LOWORD(X509_PKIX_POLICY_QUALIFIER_USERNOTICE):
5327 decodeFunc = CRYPT_AsnDecodePolicyQualifierUserNotice;
5328 break;
5329 case LOWORD(PKCS_ATTRIBUTES):
5330 decodeFunc = CRYPT_AsnDecodePKCSAttributes;
5331 break;
5332 case LOWORD(X509_ISSUING_DIST_POINT):
5333 decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
5334 break;
5335 case LOWORD(X509_NAME_CONSTRAINTS):
5336 decodeFunc = CRYPT_AsnDecodeNameConstraints;
5337 break;
5338 case LOWORD(PKCS7_SIGNER_INFO):
5339 decodeFunc = CRYPT_AsnDecodePKCSSignerInfo;
5340 break;
5341 case LOWORD(CMS_SIGNER_INFO):
5342 decodeFunc = CRYPT_AsnDecodeCMSSignerInfo;
5343 break;
5344 }
5345 }
5346 else if (!strcmp(lpszStructType, szOID_CERT_EXTENSIONS))
5347 decodeFunc = CRYPT_AsnDecodeExtensions;
5348 else if (!strcmp(lpszStructType, szOID_RSA_signingTime))
5349 decodeFunc = CRYPT_AsnDecodeUtcTime;
5350 else if (!strcmp(lpszStructType, szOID_RSA_SMIMECapabilities))
5351 decodeFunc = CRYPT_AsnDecodeSMIMECapabilities;
5352 else if (!strcmp(lpszStructType, szOID_AUTHORITY_KEY_IDENTIFIER))
5353 decodeFunc = CRYPT_AsnDecodeAuthorityKeyId;
5354 else if (!strcmp(lpszStructType, szOID_AUTHORITY_KEY_IDENTIFIER2))
5355 decodeFunc = CRYPT_AsnDecodeAuthorityKeyId2;
5356 else if (!strcmp(lpszStructType, szOID_CRL_REASON_CODE))
5357 decodeFunc = CRYPT_AsnDecodeEnumerated;
5358 else if (!strcmp(lpszStructType, szOID_KEY_USAGE))
5359 decodeFunc = CRYPT_AsnDecodeBits;
5360 else if (!strcmp(lpszStructType, szOID_SUBJECT_KEY_IDENTIFIER))
5361 decodeFunc = CRYPT_AsnDecodeOctets;
5362 else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS))
5363 decodeFunc = CRYPT_AsnDecodeBasicConstraints;
5364 else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS2))
5365 decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
5366 else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME))
5367 decodeFunc = CRYPT_AsnDecodeAltName;
5368 else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME2))
5369 decodeFunc = CRYPT_AsnDecodeAltName;
5370 else if (!strcmp(lpszStructType, szOID_NEXT_UPDATE_LOCATION))
5371 decodeFunc = CRYPT_AsnDecodeAltName;
5372 else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME))
5373 decodeFunc = CRYPT_AsnDecodeAltName;
5374 else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME2))
5375 decodeFunc = CRYPT_AsnDecodeAltName;
5376 else if (!strcmp(lpszStructType, szOID_CRL_DIST_POINTS))
5377 decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
5378 else if (!strcmp(lpszStructType, szOID_CERT_POLICIES))
5379 decodeFunc = CRYPT_AsnDecodeCertPolicies;
5380 else if (!strcmp(lpszStructType, szOID_ENHANCED_KEY_USAGE))
5381 decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
5382 else if (!strcmp(lpszStructType, szOID_ISSUING_DIST_POINT))
5383 decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
5384 else if (!strcmp(lpszStructType, szOID_NAME_CONSTRAINTS))
5385 decodeFunc = CRYPT_AsnDecodeNameConstraints;
5386 else if (!strcmp(lpszStructType, szOID_AUTHORITY_INFO_ACCESS))
5387 decodeFunc = CRYPT_AsnDecodeAuthorityInfoAccess;
5388 else if (!strcmp(lpszStructType, szOID_PKIX_POLICY_QUALIFIER_USERNOTICE))
5389 decodeFunc = CRYPT_AsnDecodePolicyQualifierUserNotice;
5390 else if (!strcmp(lpszStructType, szOID_CTL))
5391 decodeFunc = CRYPT_AsnDecodeCTL;
5392 return decodeFunc;
5393}
5394
5395static CryptDecodeObjectFunc CRYPT_LoadDecoderFunc(DWORD dwCertEncodingType,
5396 LPCSTR lpszStructType, HCRYPTOIDFUNCADDR *hFunc)
5397{
5398 static HCRYPTOIDFUNCSET set = NULL;
5399 CryptDecodeObjectFunc decodeFunc = NULL;
5400
5401 if (!set)
5402 set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_FUNC, 0);
5403 CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
5404 (void **)&decodeFunc, hFunc);
5405 return decodeFunc;
5406}
5407
5408static CryptDecodeObjectExFunc CRYPT_LoadDecoderExFunc(DWORD dwCertEncodingType,
5409 LPCSTR lpszStructType, HCRYPTOIDFUNCADDR *hFunc)
5410{
5411 static HCRYPTOIDFUNCSET set = NULL;
5412 CryptDecodeObjectExFunc decodeFunc = NULL;
5413
5414 if (!set)
5415 set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_EX_FUNC, 0);
5416 CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
5417 (void **)&decodeFunc, hFunc);
5418 return decodeFunc;
5419}
5420
5421BOOL WINAPI CryptDecodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
5422 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
5423 DWORD *pcbStructInfo)
5424{
5425 BOOL ret = FALSE;
5426 CryptDecodeObjectFunc pCryptDecodeObject = NULL;
5427 CryptDecodeObjectExFunc pCryptDecodeObjectEx = NULL;
5428 HCRYPTOIDFUNCADDR hFunc = NULL;
5429
5430 TRACE_(crypt)("(0x%08x, %s, %p, %d, 0x%08x, %p, %p)\n", dwCertEncodingType,
5431 debugstr_a(lpszStructType), pbEncoded, cbEncoded, dwFlags,
5432 pvStructInfo, pcbStructInfo);
5433
5434 if (!pvStructInfo && !pcbStructInfo)
5435 {
5436 SetLastError(ERROR_INVALID_PARAMETER);
5437 return FALSE;
5438 }
5439 if (cbEncoded > MAX_ENCODED_LEN)
5440 {
5441 SetLastError(CRYPT_E_ASN1_LARGE);
5442 return FALSE;
5443 }
5444
5445 if (!(pCryptDecodeObjectEx = CRYPT_GetBuiltinDecoder(dwCertEncodingType,
5446 lpszStructType)))
5447 {
5448 TRACE_(crypt)("OID %s not found or unimplemented, looking for DLL\n",
5449 debugstr_a(lpszStructType));
5450 pCryptDecodeObject = CRYPT_LoadDecoderFunc(dwCertEncodingType,
5451 lpszStructType, &hFunc);
5452 if (!pCryptDecodeObject)
5453 pCryptDecodeObjectEx = CRYPT_LoadDecoderExFunc(dwCertEncodingType,
5454 lpszStructType, &hFunc);
5455 }
5456 if (pCryptDecodeObject)
5457 ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
5458 pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
5459 else if (pCryptDecodeObjectEx)
5460 ret = pCryptDecodeObjectEx(dwCertEncodingType, lpszStructType,
5461 pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
5462 pvStructInfo, pcbStructInfo);
5463 if (hFunc)
5464 CryptFreeOIDFunctionAddress(hFunc, 0);
5465 TRACE_(crypt)("returning %d\n", ret);
5466 return ret;
5467}
5468
5469BOOL WINAPI CryptDecodeObjectEx(DWORD dwCertEncodingType, LPCSTR lpszStructType,
5470 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
5471 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
5472{
5473 BOOL ret = FALSE;
5474 CryptDecodeObjectExFunc decodeFunc;
5475 HCRYPTOIDFUNCADDR hFunc = NULL;
5476
5477 TRACE_(crypt)("(0x%08x, %s, %p, %d, 0x%08x, %p, %p, %p)\n",
5478 dwCertEncodingType, debugstr_a(lpszStructType), pbEncoded,
5479 cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
5480
5481 if (!pvStructInfo && !pcbStructInfo)
5482 {
5483 SetLastError(ERROR_INVALID_PARAMETER);
5484 return FALSE;
5485 }
5486 if (cbEncoded > MAX_ENCODED_LEN)
5487 {
5488 SetLastError(CRYPT_E_ASN1_LARGE);
5489 return FALSE;
5490 }
5491
5492 SetLastError(NOERROR);
5493 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG && pvStructInfo)
5494 *(BYTE **)pvStructInfo = NULL;
5495 decodeFunc = CRYPT_GetBuiltinDecoder(dwCertEncodingType, lpszStructType);
5496 if (!decodeFunc)
5497 {
5498 TRACE_(crypt)("OID %s not found or unimplemented, looking for DLL\n",
5499 debugstr_a(lpszStructType));
5500 decodeFunc = CRYPT_LoadDecoderExFunc(dwCertEncodingType, lpszStructType,
5501 &hFunc);
5502 }
5503 if (decodeFunc)
5504 ret = decodeFunc(dwCertEncodingType, lpszStructType, pbEncoded,
5505 cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
5506 else
5507 {
5508 CryptDecodeObjectFunc pCryptDecodeObject =
5509 CRYPT_LoadDecoderFunc(dwCertEncodingType, lpszStructType, &hFunc);
5510
5511 /* Try CryptDecodeObject function. Don't call CryptDecodeObject
5512 * directly, as that could cause an infinite loop.
5513 */
5514 if (pCryptDecodeObject)
5515 {
5516 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
5517 {
5518 ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
5519 pbEncoded, cbEncoded, dwFlags, NULL, pcbStructInfo);
5520 if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
5521 pvStructInfo, pcbStructInfo, *pcbStructInfo)))
5522 ret = pCryptDecodeObject(dwCertEncodingType,
5523 lpszStructType, pbEncoded, cbEncoded, dwFlags,
5524 *(BYTE **)pvStructInfo, pcbStructInfo);
5525 }
5526 else
5527 ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
5528 pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
5529 }
5530 }
5531 if (hFunc)
5532 CryptFreeOIDFunctionAddress(hFunc, 0);
5533 TRACE_(crypt)("returning %d\n", ret);
5534 return ret;
5535}
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