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dmusic: Print 64bit integers with wine_dbgstr_longlong.
[wine.git] / dlls / crypt32 / decode.c
blob4e20de482c7f3959296a3aee86d4394f66414485
1 /*
2 * Copyright 2005 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 is
21 * undocumented, 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:
31 * http://msdn.microsoft.com/library/en-us/seccrypto/security/constants_for_cryptencodeobject_and_cryptdecodeobject.asp
32 */
33
34 #include <assert.h>
35 #include <stdarg.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38
39 #define NONAMELESSUNION
40
41 #include "windef.h"
42 #include "winbase.h"
43 #include "excpt.h"
44 #include "wincrypt.h"
45 #include "winnls.h"
46 #include "winreg.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
58 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
59
60 struct GenericArray
61 {
62 DWORD cItems;
63 BYTE *rgItems;
64 };
65
66 typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
67 DWORD, DWORD, void *, DWORD *);
68 typedef BOOL (WINAPI *CryptDecodeObjectExFunc)(DWORD, LPCSTR, const BYTE *,
69 DWORD, DWORD, PCRYPT_DECODE_PARA, void *, DWORD *);
70
71 /* Prototypes for built-in decoders. They follow the Ex style prototypes.
72 * The dwCertEncodingType and lpszStructType are ignored by the built-in
73 * functions, but the parameters are retained to simplify CryptDecodeObjectEx,
74 * since it must call functions in external DLLs that follow these signatures.
75 */
76 static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
77 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
78 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
79 static BOOL WINAPI CRYPT_AsnDecodePubKeyInfoInternal(DWORD dwCertEncodingType,
80 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
81 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
82 /* Like CRYPT_AsnDecodeExtensions, except assumes rgExtension is set ahead of
83 * time, doesn't do memory allocation, and doesn't do exception handling.
84 * (This isn't intended to be the externally-called one.)
85 */
86 static BOOL WINAPI CRYPT_AsnDecodeExtensionsInternal(DWORD dwCertEncodingType,
87 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
88 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
89 /* Assumes algo->Parameters.pbData is set ahead of time. Internal func. */
90 static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
91 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
92 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
93 /* Internal function */
94 static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
95 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
96 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
97 /* Assumes the CRYPT_DATA_BLOB's pbData member has been initialized */
98 static BOOL WINAPI CRYPT_AsnDecodeOctetsInternal(DWORD dwCertEncodingType,
99 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
100 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
101 /* Like CRYPT_AsnDecodeBits, but assumes the CRYPT_INTEGER_BLOB's pbData
102 * member has been initialized, doesn't do exception handling, and doesn't do
103 * memory allocation.
104 */
105 static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
106 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
107 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
108 static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
109 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
110 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
111 static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
112 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
113 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
114 /* Like CRYPT_AsnDecodeInteger, but assumes the CRYPT_INTEGER_BLOB's pbData
115 * member has been initialized, doesn't do exception handling, and doesn't do
116 * memory allocation.
117 */
118 static BOOL WINAPI CRYPT_AsnDecodeIntegerInternal(DWORD dwCertEncodingType,
119 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
120 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
121 /* Like CRYPT_AsnDecodeInteger, but unsigned. */
122 static BOOL WINAPI CRYPT_AsnDecodeUnsignedIntegerInternal(
123 DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
124 DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
125 void *pvStructInfo, DWORD *pcbStructInfo);
126
127 BOOL WINAPI CryptDecodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
128 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
129 DWORD *pcbStructInfo)
130 {
131 static HCRYPTOIDFUNCSET set = NULL;
132 BOOL ret = FALSE;
133 CryptDecodeObjectFunc pCryptDecodeObject;
134 HCRYPTOIDFUNCADDR hFunc;
135
136 TRACE("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p)\n", dwCertEncodingType,
137 debugstr_a(lpszStructType), pbEncoded, cbEncoded, dwFlags,
138 pvStructInfo, pcbStructInfo);
139
140 if (!pvStructInfo && !pcbStructInfo)
141 {
142 SetLastError(ERROR_INVALID_PARAMETER);
143 return FALSE;
144 }
145
146 /* Try registered DLL first.. */
147 if (!set)
148 set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_FUNC, 0);
149 CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
150 (void **)&pCryptDecodeObject, &hFunc);
151 if (pCryptDecodeObject)
152 {
153 ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
154 pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
155 CryptFreeOIDFunctionAddress(hFunc, 0);
156 }
157 else
158 {
159 /* If not, use CryptDecodeObjectEx */
160 ret = CryptDecodeObjectEx(dwCertEncodingType, lpszStructType, pbEncoded,
161 cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo);
162 }
163 return ret;
164 }
165
166 /* Gets the number of length bytes from the given (leading) length byte */
167 #define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))
168
169 /* Helper function to get the encoded length of the data starting at pbEncoded,
170 * where pbEncoded[0] is the tag. If the data are too short to contain a
171 * length or if the length is too large for cbEncoded, sets an appropriate
172 * error code and returns FALSE.
173 */
174 static BOOL WINAPI CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded,
175 DWORD *len)
176 {
177 BOOL ret;
178
179 if (cbEncoded <= 1)
180 {
181 SetLastError(CRYPT_E_ASN1_CORRUPT);
182 ret = FALSE;
183 }
184 else if (pbEncoded[1] <= 0x7f)
185 {
186 if (pbEncoded[1] + 1 > cbEncoded)
187 {
188 SetLastError(CRYPT_E_ASN1_EOD);
189 ret = FALSE;
190 }
191 else
192 {
193 *len = pbEncoded[1];
194 ret = TRUE;
195 }
196 }
197 else
198 {
199 BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
200
201 if (lenLen > sizeof(DWORD) + 1)
202 {
203 SetLastError(CRYPT_E_ASN1_LARGE);
204 ret = FALSE;
205 }
206 else if (lenLen + 2 > cbEncoded)
207 {
208 SetLastError(CRYPT_E_ASN1_CORRUPT);
209 ret = FALSE;
210 }
211 else
212 {
213 DWORD out = 0;
214
215 pbEncoded += 2;
216 while (--lenLen)
217 {
218 out <<= 8;
219 out |= *pbEncoded++;
220 }
221 if (out + lenLen + 1 > cbEncoded)
222 {
223 SetLastError(CRYPT_E_ASN1_EOD);
224 ret = FALSE;
225 }
226 else
227 {
228 *len = out;
229 ret = TRUE;
230 }
231 }
232 }
233 return ret;
234 }
235
236 /* Helper function to check *pcbStructInfo, set it to the required size, and
237 * optionally to allocate memory. Assumes pvStructInfo is not NULL.
238 * If CRYPT_DECODE_ALLOC_FLAG is set in dwFlags, *pvStructInfo will be set to a
239 * pointer to the newly allocated memory.
240 */
241 static BOOL CRYPT_DecodeEnsureSpace(DWORD dwFlags,
242 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
243 DWORD bytesNeeded)
244 {
245 BOOL ret = TRUE;
246
247 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
248 {
249 if (pDecodePara && pDecodePara->pfnAlloc)
250 *(BYTE **)pvStructInfo = pDecodePara->pfnAlloc(bytesNeeded);
251 else
252 *(BYTE **)pvStructInfo = LocalAlloc(0, bytesNeeded);
253 if (!*(BYTE **)pvStructInfo)
254 ret = FALSE;
255 else
256 *pcbStructInfo = bytesNeeded;
257 }
258 else if (*pcbStructInfo < bytesNeeded)
259 {
260 *pcbStructInfo = bytesNeeded;
261 SetLastError(ERROR_MORE_DATA);
262 ret = FALSE;
263 }
264 return ret;
265 }
266
267 /* tag:
268 * The expected tag of the item. If tag is 0, decodeFunc is called
269 * regardless of the tag value seen.
270 * offset:
271 * A sequence is decoded into a struct. The offset member is the
272 * offset of this item within that struct.
273 * decodeFunc:
274 * The decoder function to use. If this is NULL, then the member isn't
275 * decoded, but minSize space is reserved for it.
276 * minSize:
277 * The minimum amount of space occupied after decoding. You must set this.
278 * optional:
279 * If true, and the tag doesn't match the expected tag for this item,
280 * or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
281 * filled with 0 for this member.
282 * hasPointer, pointerOffset, minSize:
283 * If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
284 * the offset within the (outer) struct of the data pointer (or to the
285 * first data pointer, if more than one exist).
286 * size:
287 * Used by CRYPT_AsnDecodeSequence, not for your use.
288 */
289 struct AsnDecodeSequenceItem
290 {
291 BYTE tag;
292 DWORD offset;
293 CryptDecodeObjectExFunc decodeFunc;
294 DWORD minSize;
295 BOOL optional;
296 BOOL hasPointer;
297 DWORD pointerOffset;
298 DWORD size;
299 };
300
301 static BOOL CRYPT_AsnDecodeSequenceItems(DWORD dwCertEncodingType,
302 struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
303 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, BYTE *nextData)
304 {
305 BOOL ret;
306 DWORD i;
307 const BYTE *ptr;
308
309 ptr = pbEncoded + 1 + GET_LEN_BYTES(pbEncoded[1]);
310 for (i = 0, ret = TRUE; ret && i < cItem; i++)
311 {
312 if (cbEncoded - (ptr - pbEncoded) != 0)
313 {
314 DWORD nextItemLen;
315
316 if ((ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
317 &nextItemLen)))
318 {
319 BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);
320
321 if (ptr[0] == items[i].tag || !items[i].tag)
322 {
323 if (nextData && pvStructInfo && items[i].hasPointer)
324 {
325 TRACE("Setting next pointer to %p\n",
326 nextData);
327 *(BYTE **)((BYTE *)pvStructInfo +
328 items[i].pointerOffset) = nextData;
329 }
330 if (items[i].decodeFunc)
331 {
332 if (pvStructInfo)
333 TRACE("decoding item %ld\n", i);
334 else
335 TRACE("sizing item %ld\n", i);
336 ret = items[i].decodeFunc(dwCertEncodingType,
337 NULL, ptr, 1 + nextItemLenBytes + nextItemLen,
338 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
339 pvStructInfo ? (BYTE *)pvStructInfo + items[i].offset
340 : NULL, &items[i].size);
341 if (ret)
342 {
343 if (nextData && items[i].hasPointer &&
344 items[i].size > items[i].minSize)
345 {
346 nextData += items[i].size - items[i].minSize;
347 /* align nextData to DWORD boundaries */
348 if (items[i].size % sizeof(DWORD))
349 nextData += sizeof(DWORD) - items[i].size %
350 sizeof(DWORD);
351 }
352 /* Account for alignment padding */
353 if (items[i].size % sizeof(DWORD))
354 items[i].size += sizeof(DWORD) -
355 items[i].size % sizeof(DWORD);
356 ptr += 1 + nextItemLenBytes + nextItemLen;
357 }
358 else if (items[i].optional &&
359 GetLastError() == CRYPT_E_ASN1_BADTAG)
360 {
361 TRACE("skipping optional item %ld\n", i);
362 items[i].size = items[i].minSize;
363 SetLastError(NOERROR);
364 ret = TRUE;
365 }
366 else
367 TRACE("item %ld failed: %08lx\n", i,
368 GetLastError());
369 }
370 else
371 items[i].size = items[i].minSize;
372 }
373 else if (items[i].optional)
374 {
375 TRACE("skipping optional item %ld\n", i);
376 items[i].size = items[i].minSize;
377 }
378 else
379 {
380 TRACE("tag %02x doesn't match expected %02x\n",
381 ptr[0], items[i].tag);
382 SetLastError(CRYPT_E_ASN1_BADTAG);
383 ret = FALSE;
384 }
385 }
386 }
387 else if (items[i].optional)
388 {
389 TRACE("missing optional item %ld, skipping\n", i);
390 items[i].size = items[i].minSize;
391 }
392 else
393 {
394 TRACE("not enough bytes for item %ld, failing\n", i);
395 SetLastError(CRYPT_E_ASN1_CORRUPT);
396 ret = FALSE;
397 }
398 }
399 if (cbEncoded - (ptr - pbEncoded) != 0)
400 {
401 TRACE("%ld remaining bytes, failing\n", cbEncoded -
402 (ptr - pbEncoded));
403 SetLastError(CRYPT_E_ASN1_CORRUPT);
404 ret = FALSE;
405 }
406 return ret;
407 }
408
409 /* This decodes an arbitrary sequence into a contiguous block of memory
410 * (basically, a struct.) Each element being decoded is described by a struct
411 * AsnDecodeSequenceItem, see above.
412 * startingPointer is an optional pointer to the first place where dynamic
413 * data will be stored. If you know the starting offset, you may pass it
414 * here. Otherwise, pass NULL, and one will be inferred from the items.
415 * Each item decoder is never called with CRYPT_DECODE_ALLOC_FLAG set.
416 * If any undecoded data are left over, fails with CRYPT_E_ASN1_CORRUPT.
417 */
418 static BOOL CRYPT_AsnDecodeSequence(DWORD dwCertEncodingType,
419 struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
420 DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
421 void *pvStructInfo, DWORD *pcbStructInfo, void *startingPointer)
422 {
423 BOOL ret;
424
425 TRACE("%p, %ld, %p, %ld, %08lx, %p, %p, %ld, %p\n", items, cItem, pbEncoded,
426 cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
427 startingPointer);
428
429 if (pbEncoded[0] == ASN_SEQUENCE)
430 {
431 DWORD dataLen;
432
433 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
434 {
435 DWORD i;
436
437 ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem, pbEncoded,
438 cbEncoded, dwFlags, NULL, NULL);
439 if (ret)
440 {
441 DWORD bytesNeeded = 0, structSize = 0;
442
443 for (i = 0; i < cItem; i++)
444 {
445 bytesNeeded += items[i].size;
446 structSize += items[i].minSize;
447 }
448 if (!pvStructInfo)
449 *pcbStructInfo = bytesNeeded;
450 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
451 pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
452 {
453 BYTE *nextData;
454
455 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
456 pvStructInfo = *(BYTE **)pvStructInfo;
457 if (startingPointer)
458 nextData = (BYTE *)startingPointer;
459 else
460 nextData = (BYTE *)pvStructInfo + structSize;
461 memset(pvStructInfo, 0, structSize);
462 ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem,
463 pbEncoded, cbEncoded, dwFlags, pvStructInfo, nextData);
464 }
465 }
466 }
467 }
468 else
469 {
470 SetLastError(CRYPT_E_ASN1_BADTAG);
471 ret = FALSE;
472 }
473 TRACE("returning %d (%08lx)\n", ret, GetLastError());
474 return ret;
475 }
476
477 /* tag:
478 * The expected tag of the entire encoded array (usually a variant
479 * of ASN_SETOF or ASN_SEQUENCEOF.)
480 * decodeFunc:
481 * used to decode each item in the array
482 * itemSize:
483 * is the minimum size of each decoded item
484 * hasPointer:
485 * indicates whether each item has a dynamic pointer
486 * pointerOffset:
487 * indicates the offset within itemSize at which the pointer exists
488 */
489 struct AsnArrayDescriptor
490 {
491 BYTE tag;
492 CryptDecodeObjectExFunc decodeFunc;
493 DWORD itemSize;
494 BOOL hasPointer;
495 DWORD pointerOffset;
496 };
497
498 struct AsnArrayItemSize
499 {
500 DWORD encodedLen;
501 DWORD size;
502 };
503
504 /* Decodes an array of like types into a struct GenericArray.
505 * The layout and decoding of the array are described by a struct
506 * AsnArrayDescriptor.
507 */
508 static BOOL CRYPT_AsnDecodeArray(const struct AsnArrayDescriptor *arrayDesc,
509 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
510 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
511 void *startingPointer)
512 {
513 BOOL ret = TRUE;
514
515 TRACE("%p, %p, %ld, %08lx, %p, %p, %ld, %p\n", arrayDesc, pbEncoded,
516 cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
517 startingPointer);
518
519 if (pbEncoded[0] == arrayDesc->tag)
520 {
521 DWORD dataLen;
522
523 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
524 {
525 DWORD bytesNeeded, cItems = 0;
526 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
527 /* There can be arbitrarily many items, but there is often only one.
528 */
529 struct AsnArrayItemSize itemSize = { 0 }, *itemSizes = &itemSize;
530
531 bytesNeeded = sizeof(struct GenericArray);
532 if (dataLen)
533 {
534 const BYTE *ptr;
535
536 for (ptr = pbEncoded + 1 + lenBytes; ret &&
537 ptr - pbEncoded - 1 - lenBytes < dataLen; )
538 {
539 DWORD itemLenBytes, itemDataLen, size;
540
541 itemLenBytes = GET_LEN_BYTES(ptr[1]);
542 /* Each item decoded may not tolerate extraneous bytes, so
543 * get the length of the next element and pass it directly.
544 */
545 ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
546 &itemDataLen);
547 if (ret)
548 ret = arrayDesc->decodeFunc(X509_ASN_ENCODING, 0, ptr,
549 1 + itemLenBytes + itemDataLen,
550 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL,
551 &size);
552 if (ret)
553 {
554 DWORD nextLen;
555
556 cItems++;
557 if (itemSizes != &itemSize)
558 itemSizes = CryptMemRealloc(itemSizes,
559 cItems * sizeof(struct AsnArrayItemSize));
560 else
561 {
562 itemSizes =
563 CryptMemAlloc(
564 cItems * sizeof(struct AsnArrayItemSize));
565 if (itemSizes)
566 memcpy(itemSizes, &itemSize, sizeof(itemSize));
567 }
568 if (itemSizes)
569 {
570 itemSizes[cItems - 1].encodedLen = 1 + itemLenBytes
571 + itemDataLen;
572 itemSizes[cItems - 1].size = size;
573 bytesNeeded += size;
574 ret = CRYPT_GetLen(ptr,
575 cbEncoded - (ptr - pbEncoded), &nextLen);
576 if (ret)
577 ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
578 }
579 else
580 ret = FALSE;
581 }
582 }
583 }
584 if (ret)
585 {
586 if (!pvStructInfo)
587 *pcbStructInfo = bytesNeeded;
588 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
589 pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
590 {
591 DWORD i;
592 BYTE *nextData;
593 const BYTE *ptr;
594 struct GenericArray *array;
595
596 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
597 pvStructInfo = *(BYTE **)pvStructInfo;
598 array = (struct GenericArray *)pvStructInfo;
599 array->cItems = cItems;
600 if (startingPointer)
601 array->rgItems = startingPointer;
602 else
603 array->rgItems = (BYTE *)array +
604 sizeof(struct GenericArray);
605 nextData = (BYTE *)array->rgItems +
606 array->cItems * arrayDesc->itemSize;
607 for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
608 i < cItems && ptr - pbEncoded - 1 - lenBytes <
609 dataLen; i++)
610 {
611 if (arrayDesc->hasPointer)
612 *(BYTE **)(array->rgItems + i * arrayDesc->itemSize
613 + arrayDesc->pointerOffset) = nextData;
614 ret = arrayDesc->decodeFunc(X509_ASN_ENCODING, 0, ptr,
615 itemSizes[i].encodedLen,
616 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
617 array->rgItems + i * arrayDesc->itemSize,
618 &itemSizes[i].size);
619 if (ret)
620 {
621 DWORD nextLen;
622
623 nextData += itemSizes[i].size - arrayDesc->itemSize;
624 ret = CRYPT_GetLen(ptr,
625 cbEncoded - (ptr - pbEncoded), &nextLen);
626 if (ret)
627 ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
628 }
629 }
630 }
631 }
632 if (itemSizes != &itemSize)
633 CryptMemFree(itemSizes);
634 }
635 }
636 else
637 {
638 SetLastError(CRYPT_E_ASN1_BADTAG);
639 ret = FALSE;
640 }
641 return ret;
642 }
643
644 /* Decodes a DER-encoded BLOB into a CRYPT_DER_BLOB struct pointed to by
645 * pvStructInfo. The BLOB must be non-empty, otherwise the last error is set
646 * to CRYPT_E_ASN1_CORRUPT.
647 * Warning: assumes the CRYPT_DER_BLOB pointed to by pvStructInfo has pbData
648 * set!
649 */
650 static BOOL WINAPI CRYPT_AsnDecodeDerBlob(DWORD dwCertEncodingType,
651 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
652 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
653 {
654 BOOL ret;
655 DWORD dataLen;
656
657 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
658 {
659 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
660 DWORD bytesNeeded = sizeof(CRYPT_DER_BLOB);
661
662 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
663 bytesNeeded += 1 + lenBytes + dataLen;
664
665 if (!pvStructInfo)
666 *pcbStructInfo = bytesNeeded;
667 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
668 pvStructInfo, pcbStructInfo, bytesNeeded)))
669 {
670 CRYPT_DER_BLOB *blob;
671
672 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
673 pvStructInfo = *(BYTE **)pvStructInfo;
674 blob = (CRYPT_DER_BLOB *)pvStructInfo;
675 blob->cbData = 1 + lenBytes + dataLen;
676 if (blob->cbData)
677 {
678 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
679 blob->pbData = (BYTE *)pbEncoded;
680 else
681 {
682 assert(blob->pbData);
683 memcpy(blob->pbData, pbEncoded, blob->cbData);
684 }
685 }
686 else
687 {
688 SetLastError(CRYPT_E_ASN1_CORRUPT);
689 ret = FALSE;
690 }
691 }
692 }
693 return ret;
694 }
695
696 /* Like CRYPT_AsnDecodeBitsInternal, but swaps the bytes */
697 static BOOL WINAPI CRYPT_AsnDecodeBitsSwapBytes(DWORD dwCertEncodingType,
698 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
699 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
700 {
701 BOOL ret;
702
703 TRACE("(%p, %ld, 0x%08lx, %p, %p, %ld)\n", pbEncoded, cbEncoded, dwFlags,
704 pDecodePara, pvStructInfo, *pcbStructInfo);
705
706 /* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
707 * place.
708 */
709 ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType, lpszStructType,
710 pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pDecodePara,
711 pvStructInfo, pcbStructInfo);
712 if (ret && pvStructInfo)
713 {
714 CRYPT_BIT_BLOB *blob = (CRYPT_BIT_BLOB *)pvStructInfo;
715
716 if (blob->cbData)
717 {
718 DWORD i;
719 BYTE temp;
720
721 for (i = 0; i < blob->cbData / 2; i++)
722 {
723 temp = blob->pbData[i];
724 blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
725 blob->pbData[blob->cbData - i - 1] = temp;
726 }
727 }
728 }
729 TRACE("returning %d (%08lx)\n", ret, GetLastError());
730 return ret;
731 }
732
733 static BOOL WINAPI CRYPT_AsnDecodeCertSignedContent(DWORD dwCertEncodingType,
734 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
735 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
736 {
737 BOOL ret = TRUE;
738
739 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
740 pDecodePara, pvStructInfo, *pcbStructInfo);
741
742 __TRY
743 {
744 struct AsnDecodeSequenceItem items[] = {
745 { 0, offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned),
746 CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
747 offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned.pbData), 0 },
748 { ASN_SEQUENCEOF, offsetof(CERT_SIGNED_CONTENT_INFO,
749 SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
750 sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
751 offsetof(CERT_SIGNED_CONTENT_INFO, SignatureAlgorithm.pszObjId), 0 },
752 { ASN_BITSTRING, offsetof(CERT_SIGNED_CONTENT_INFO, Signature),
753 CRYPT_AsnDecodeBitsSwapBytes, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
754 offsetof(CERT_SIGNED_CONTENT_INFO, Signature.pbData), 0 },
755 };
756
757 if (dwFlags & CRYPT_DECODE_NO_SIGNATURE_BYTE_REVERSAL_FLAG)
758 items[2].decodeFunc = CRYPT_AsnDecodeBitsInternal;
759 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
760 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
761 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
762 }
763 __EXCEPT_PAGE_FAULT
764 {
765 SetLastError(STATUS_ACCESS_VIOLATION);
766 ret = FALSE;
767 }
768 __ENDTRY
769
770 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
771 return ret;
772 }
773
774 /* Internal function */
775 static BOOL WINAPI CRYPT_AsnDecodeCertVersion(DWORD dwCertEncodingType,
776 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
777 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
778 {
779 BOOL ret;
780 DWORD dataLen;
781
782 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
783 {
784 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
785
786 ret = CRYPT_AsnDecodeInt(dwCertEncodingType, X509_INTEGER,
787 pbEncoded + 1 + lenBytes, dataLen, dwFlags, pDecodePara,
788 pvStructInfo, pcbStructInfo);
789 }
790 return ret;
791 }
792
793 static BOOL WINAPI CRYPT_AsnDecodeValidity(DWORD dwCertEncodingType,
794 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
795 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
796 {
797 BOOL ret;
798
799 struct AsnDecodeSequenceItem items[] = {
800 { 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotBefore),
801 CRYPT_AsnDecodeChoiceOfTime, sizeof(FILETIME), FALSE, FALSE, 0 },
802 { 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotAfter),
803 CRYPT_AsnDecodeChoiceOfTime, sizeof(FILETIME), FALSE, FALSE, 0 },
804 };
805
806 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
807 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
808 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
809 return ret;
810 }
811
812 /* Internal function */
813 static BOOL WINAPI CRYPT_AsnDecodeCertExtensions(DWORD dwCertEncodingType,
814 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
815 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
816 {
817 BOOL ret;
818 DWORD dataLen;
819
820 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
821 {
822 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
823
824 ret = CRYPT_AsnDecodeExtensionsInternal(dwCertEncodingType,
825 X509_EXTENSIONS, pbEncoded + 1 + lenBytes, dataLen, dwFlags,
826 pDecodePara, pvStructInfo, pcbStructInfo);
827 }
828 return ret;
829 }
830
831 static BOOL WINAPI CRYPT_AsnDecodeCertInfo(DWORD dwCertEncodingType,
832 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
833 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
834 {
835 BOOL ret = TRUE;
836 struct AsnDecodeSequenceItem items[] = {
837 { ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(CERT_INFO, dwVersion),
838 CRYPT_AsnDecodeCertVersion, sizeof(DWORD), TRUE, FALSE, 0, 0 },
839 { ASN_INTEGER, offsetof(CERT_INFO, SerialNumber),
840 CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
841 TRUE, offsetof(CERT_INFO, SerialNumber.pbData), 0 },
842 { ASN_SEQUENCEOF, offsetof(CERT_INFO, SignatureAlgorithm),
843 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
844 FALSE, TRUE, offsetof(CERT_INFO, SignatureAlgorithm.pszObjId), 0 },
845 { 0, offsetof(CERT_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
846 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
847 Issuer.pbData) },
848 { ASN_SEQUENCEOF, offsetof(CERT_INFO, NotBefore),
849 CRYPT_AsnDecodeValidity, sizeof(CERT_PRIVATE_KEY_VALIDITY), FALSE,
850 FALSE, 0 },
851 { 0, offsetof(CERT_INFO, Subject), CRYPT_AsnDecodeDerBlob,
852 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
853 Subject.pbData) },
854 { ASN_SEQUENCEOF, offsetof(CERT_INFO, SubjectPublicKeyInfo),
855 CRYPT_AsnDecodePubKeyInfoInternal, sizeof(CERT_PUBLIC_KEY_INFO),
856 FALSE, TRUE, offsetof(CERT_INFO,
857 SubjectPublicKeyInfo.Algorithm.Parameters.pbData), 0 },
858 { ASN_BITSTRING, offsetof(CERT_INFO, IssuerUniqueId),
859 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
860 offsetof(CERT_INFO, IssuerUniqueId.pbData), 0 },
861 { ASN_BITSTRING, offsetof(CERT_INFO, SubjectUniqueId),
862 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
863 offsetof(CERT_INFO, SubjectUniqueId.pbData), 0 },
864 { ASN_CONTEXT | ASN_CONSTRUCTOR | 3, offsetof(CERT_INFO, cExtension),
865 CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
866 offsetof(CERT_INFO, rgExtension), 0 },
867 };
868
869 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
870 pDecodePara, pvStructInfo, *pcbStructInfo);
871
872 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
873 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
874 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
875
876 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
877 return ret;
878 }
879
880 static BOOL WINAPI CRYPT_AsnDecodeCert(DWORD dwCertEncodingType,
881 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
882 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
883 {
884 BOOL ret = TRUE;
885
886 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
887 pDecodePara, pvStructInfo, *pcbStructInfo);
888
889 __TRY
890 {
891 PCERT_SIGNED_CONTENT_INFO signedCert = NULL;
892 DWORD size = 0;
893
894 /* First try to decode it as a signed cert. */
895 ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType, X509_CERT,
896 pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
897 (BYTE *)&signedCert, &size);
898 if (ret)
899 {
900 size = 0;
901 ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
902 X509_CERT_TO_BE_SIGNED, signedCert->ToBeSigned.pbData,
903 signedCert->ToBeSigned.cbData, dwFlags, pDecodePara, pvStructInfo,
904 pcbStructInfo);
905 LocalFree(signedCert);
906 }
907 /* Failing that, try it as an unsigned cert */
908 if (!ret)
909 {
910 size = 0;
911 ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
912 X509_CERT_TO_BE_SIGNED, pbEncoded, cbEncoded, dwFlags,
913 pDecodePara, pvStructInfo, pcbStructInfo);
914 }
915 }
916 __EXCEPT_PAGE_FAULT
917 {
918 SetLastError(STATUS_ACCESS_VIOLATION);
919 ret = FALSE;
920 }
921 __ENDTRY
922
923 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
924 return ret;
925 }
926
927 static BOOL WINAPI CRYPT_AsnDecodeCRLEntry(DWORD dwCertEncodingType,
928 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
929 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
930 {
931 BOOL ret;
932 struct AsnDecodeSequenceItem items[] = {
933 { ASN_INTEGER, offsetof(CRL_ENTRY, SerialNumber),
934 CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE,
935 offsetof(CRL_ENTRY, SerialNumber.pbData), 0 },
936 { 0, offsetof(CRL_ENTRY, RevocationDate), CRYPT_AsnDecodeChoiceOfTime,
937 sizeof(FILETIME), FALSE, FALSE, 0 },
938 { ASN_SEQUENCEOF, offsetof(CRL_ENTRY, cExtension),
939 CRYPT_AsnDecodeExtensionsInternal, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
940 offsetof(CRL_ENTRY, rgExtension), 0 },
941 };
942 PCRL_ENTRY entry = (PCRL_ENTRY)pvStructInfo;
943
944 TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, entry,
945 *pcbStructInfo);
946
947 ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
948 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
949 NULL, entry, pcbStructInfo, entry ? entry->SerialNumber.pbData : NULL);
950 return ret;
951 }
952
953 /* Warning: assumes pvStructInfo is a struct GenericArray whose rgItems has
954 * been set prior to calling.
955 */
956 static BOOL WINAPI CRYPT_AsnDecodeCRLEntries(DWORD dwCertEncodingType,
957 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
958 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
959 {
960 BOOL ret;
961 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
962 CRYPT_AsnDecodeCRLEntry, sizeof(CRL_ENTRY), TRUE,
963 offsetof(CRL_ENTRY, SerialNumber.pbData) };
964 struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
965
966 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
967 pDecodePara, pvStructInfo, *pcbStructInfo);
968
969 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
970 pDecodePara, pvStructInfo, pcbStructInfo,
971 entries ? entries->rgItems : NULL);
972 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
973 return ret;
974 }
975
976 static BOOL WINAPI CRYPT_AsnDecodeCRLInfo(DWORD dwCertEncodingType,
977 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
978 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
979 {
980 struct AsnDecodeSequenceItem items[] = {
981 { ASN_INTEGER, offsetof(CRL_INFO, dwVersion),
982 CRYPT_AsnDecodeInt, sizeof(DWORD), TRUE, FALSE, 0, 0 },
983 { ASN_SEQUENCEOF, offsetof(CRL_INFO, SignatureAlgorithm),
984 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
985 FALSE, TRUE, offsetof(CRL_INFO, SignatureAlgorithm.pszObjId), 0 },
986 { 0, offsetof(CRL_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
987 sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CRL_INFO,
988 Issuer.pbData) },
989 { 0, offsetof(CRL_INFO, ThisUpdate), CRYPT_AsnDecodeChoiceOfTime,
990 sizeof(FILETIME), FALSE, FALSE, 0 },
991 { 0, offsetof(CRL_INFO, NextUpdate), CRYPT_AsnDecodeChoiceOfTime,
992 sizeof(FILETIME), TRUE, FALSE, 0 },
993 { ASN_SEQUENCEOF, offsetof(CRL_INFO, cCRLEntry),
994 CRYPT_AsnDecodeCRLEntries, sizeof(struct GenericArray), TRUE, TRUE,
995 offsetof(CRL_INFO, rgCRLEntry), 0 },
996 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_INFO, cExtension),
997 CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
998 offsetof(CRL_INFO, rgExtension), 0 },
999 };
1000 BOOL ret = TRUE;
1001
1002 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1003 pDecodePara, pvStructInfo, *pcbStructInfo);
1004
1005 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1006 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1007 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1008
1009 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
1010 return ret;
1011 }
1012
1013 static BOOL WINAPI CRYPT_AsnDecodeCRL(DWORD dwCertEncodingType,
1014 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1015 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1016 {
1017 BOOL ret = TRUE;
1018
1019 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1020 pDecodePara, pvStructInfo, *pcbStructInfo);
1021
1022 __TRY
1023 {
1024 PCERT_SIGNED_CONTENT_INFO signedCrl = NULL;
1025 DWORD size = 0;
1026
1027 /* First try to decode it as a signed crl. */
1028 ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType, X509_CERT,
1029 pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
1030 (BYTE *)&signedCrl, &size);
1031 if (ret)
1032 {
1033 size = 0;
1034 ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
1035 X509_CERT_CRL_TO_BE_SIGNED, signedCrl->ToBeSigned.pbData,
1036 signedCrl->ToBeSigned.cbData, dwFlags, pDecodePara,
1037 pvStructInfo, pcbStructInfo);
1038 LocalFree(signedCrl);
1039 }
1040 /* Failing that, try it as an unsigned crl */
1041 if (!ret)
1042 {
1043 size = 0;
1044 ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
1045 X509_CERT_CRL_TO_BE_SIGNED, pbEncoded, cbEncoded,
1046 dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
1047 }
1048 }
1049 __EXCEPT_PAGE_FAULT
1050 {
1051 SetLastError(STATUS_ACCESS_VIOLATION);
1052 ret = FALSE;
1053 }
1054 __ENDTRY
1055
1056 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
1057 return ret;
1058 }
1059
1060 static BOOL WINAPI CRYPT_AsnDecodeOidInternal(DWORD dwCertEncodingType,
1061 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1062 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1063 {
1064 BOOL ret = TRUE;
1065
1066 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1067 pDecodePara, pvStructInfo, *pcbStructInfo);
1068
1069 if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
1070 {
1071 DWORD dataLen;
1072
1073 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1074 {
1075 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1076 DWORD bytesNeeded = sizeof(LPSTR);
1077
1078 if (dataLen)
1079 {
1080 /* The largest possible string for the first two components
1081 * is 2.175 (= 2 * 40 + 175 = 255), so this is big enough.
1082 */
1083 char firstTwo[6];
1084 const BYTE *ptr;
1085
1086 snprintf(firstTwo, sizeof(firstTwo), "%d.%d",
1087 pbEncoded[1 + lenBytes] / 40,
1088 pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
1089 * 40);
1090 bytesNeeded += strlen(firstTwo) + 1;
1091 for (ptr = pbEncoded + 2 + lenBytes; ret &&
1092 ptr - pbEncoded - 1 - lenBytes < dataLen; )
1093 {
1094 /* large enough for ".4000000" */
1095 char str[9];
1096 int val = 0;
1097
1098 while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1099 (*ptr & 0x80))
1100 {
1101 val <<= 7;
1102 val |= *ptr & 0x7f;
1103 ptr++;
1104 }
1105 if (ptr - pbEncoded - 1 - lenBytes >= dataLen ||
1106 (*ptr & 0x80))
1107 {
1108 SetLastError(CRYPT_E_ASN1_CORRUPT);
1109 ret = FALSE;
1110 }
1111 else
1112 {
1113 val <<= 7;
1114 val |= *ptr++;
1115 snprintf(str, sizeof(str), ".%d", val);
1116 bytesNeeded += strlen(str);
1117 }
1118 }
1119 }
1120 if (!pvStructInfo)
1121 *pcbStructInfo = bytesNeeded;
1122 else if (*pcbStructInfo < bytesNeeded)
1123 {
1124 *pcbStructInfo = bytesNeeded;
1125 SetLastError(ERROR_MORE_DATA);
1126 ret = FALSE;
1127 }
1128 else
1129 {
1130 if (dataLen)
1131 {
1132 const BYTE *ptr;
1133 LPSTR pszObjId = *(LPSTR *)pvStructInfo;
1134
1135 *pszObjId = 0;
1136 sprintf(pszObjId, "%d.%d", pbEncoded[1 + lenBytes] / 40,
1137 pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] /
1138 40) * 40);
1139 pszObjId += strlen(pszObjId);
1140 for (ptr = pbEncoded + 2 + lenBytes; ret &&
1141 ptr - pbEncoded - 1 - lenBytes < dataLen; )
1142 {
1143 int val = 0;
1144
1145 while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1146 (*ptr & 0x80))
1147 {
1148 val <<= 7;
1149 val |= *ptr & 0x7f;
1150 ptr++;
1151 }
1152 val <<= 7;
1153 val |= *ptr++;
1154 sprintf(pszObjId, ".%d", val);
1155 pszObjId += strlen(pszObjId);
1156 }
1157 }
1158 else
1159 *(LPSTR *)pvStructInfo = NULL;
1160 *pcbStructInfo = bytesNeeded;
1161 }
1162 }
1163 }
1164 return ret;
1165 }
1166
1167 /* Warning: assumes pvStructInfo is a CERT_EXTENSION whose pszObjId is set
1168 * ahead of time!
1169 */
1170 static BOOL WINAPI CRYPT_AsnDecodeExtension(DWORD dwCertEncodingType,
1171 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1172 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1173 {
1174 struct AsnDecodeSequenceItem items[] = {
1175 { ASN_OBJECTIDENTIFIER, offsetof(CERT_EXTENSION, pszObjId),
1176 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1177 offsetof(CERT_EXTENSION, pszObjId), 0 },
1178 { ASN_BOOL, offsetof(CERT_EXTENSION, fCritical), CRYPT_AsnDecodeBool,
1179 sizeof(BOOL), TRUE, FALSE, 0, 0 },
1180 { ASN_OCTETSTRING, offsetof(CERT_EXTENSION, Value),
1181 CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_OBJID_BLOB), FALSE, TRUE,
1182 offsetof(CERT_EXTENSION, Value.pbData) },
1183 };
1184 BOOL ret = TRUE;
1185 PCERT_EXTENSION ext = (PCERT_EXTENSION)pvStructInfo;
1186
1187 TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, ext,
1188 *pcbStructInfo);
1189
1190 if (ext)
1191 TRACE("ext->pszObjId is %p\n", ext->pszObjId);
1192 ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
1193 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags, NULL,
1194 ext, pcbStructInfo, ext ? ext->pszObjId : NULL);
1195 if (ext)
1196 TRACE("ext->pszObjId is %p (%s)\n", ext->pszObjId,
1197 debugstr_a(ext->pszObjId));
1198 TRACE("returning %d (%08lx)\n", ret, GetLastError());
1199 return ret;
1200 }
1201
1202 static BOOL WINAPI CRYPT_AsnDecodeExtensionsInternal(DWORD dwCertEncodingType,
1203 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1204 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1205 {
1206 BOOL ret = TRUE;
1207 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1208 CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
1209 offsetof(CERT_EXTENSION, pszObjId) };
1210 PCERT_EXTENSIONS exts = (PCERT_EXTENSIONS)pvStructInfo;
1211
1212 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1213 pDecodePara, pvStructInfo, *pcbStructInfo);
1214
1215 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1216 pDecodePara, pvStructInfo, pcbStructInfo, exts ? exts->rgExtension : NULL);
1217 return ret;
1218 }
1219
1220 static BOOL WINAPI CRYPT_AsnDecodeExtensions(DWORD dwCertEncodingType,
1221 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1222 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1223 {
1224 BOOL ret = TRUE;
1225
1226 __TRY
1227 {
1228 ret = CRYPT_AsnDecodeExtensionsInternal(dwCertEncodingType,
1229 lpszStructType, pbEncoded, cbEncoded,
1230 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, pcbStructInfo);
1231 if (ret && pvStructInfo)
1232 {
1233 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1234 pcbStructInfo, *pcbStructInfo);
1235 if (ret)
1236 {
1237 CERT_EXTENSIONS *exts;
1238
1239 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1240 pvStructInfo = *(BYTE **)pvStructInfo;
1241 exts = (CERT_EXTENSIONS *)pvStructInfo;
1242 exts->rgExtension = (CERT_EXTENSION *)((BYTE *)exts +
1243 sizeof(CERT_EXTENSIONS));
1244 ret = CRYPT_AsnDecodeExtensionsInternal(dwCertEncodingType,
1245 lpszStructType, pbEncoded, cbEncoded,
1246 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1247 pcbStructInfo);
1248 }
1249 }
1250 }
1251 __EXCEPT_PAGE_FAULT
1252 {
1253 SetLastError(STATUS_ACCESS_VIOLATION);
1254 ret = FALSE;
1255 }
1256 __ENDTRY
1257 return ret;
1258 }
1259
1260 /* Warning: this assumes the address of value->Value.pbData is already set, in
1261 * order to avoid overwriting memory. (In some cases, it may change it, if it
1262 * doesn't copy anything to memory.) Be sure to set it correctly!
1263 */
1264 static BOOL WINAPI CRYPT_AsnDecodeNameValueInternal(DWORD dwCertEncodingType,
1265 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1266 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1267 {
1268 BOOL ret = TRUE;
1269 DWORD dataLen;
1270 CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
1271
1272 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1273 {
1274 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1275 DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
1276
1277 switch (pbEncoded[0])
1278 {
1279 case ASN_OCTETSTRING:
1280 valueType = CERT_RDN_OCTET_STRING;
1281 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1282 bytesNeeded += dataLen;
1283 break;
1284 case ASN_NUMERICSTRING:
1285 valueType = CERT_RDN_NUMERIC_STRING;
1286 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1287 bytesNeeded += dataLen;
1288 break;
1289 case ASN_PRINTABLESTRING:
1290 valueType = CERT_RDN_PRINTABLE_STRING;
1291 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1292 bytesNeeded += dataLen;
1293 break;
1294 case ASN_IA5STRING:
1295 valueType = CERT_RDN_IA5_STRING;
1296 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1297 bytesNeeded += dataLen;
1298 break;
1299 case ASN_T61STRING:
1300 valueType = CERT_RDN_T61_STRING;
1301 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1302 bytesNeeded += dataLen;
1303 break;
1304 case ASN_VIDEOTEXSTRING:
1305 valueType = CERT_RDN_VIDEOTEX_STRING;
1306 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1307 bytesNeeded += dataLen;
1308 break;
1309 case ASN_GRAPHICSTRING:
1310 valueType = CERT_RDN_GRAPHIC_STRING;
1311 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1312 bytesNeeded += dataLen;
1313 break;
1314 case ASN_VISIBLESTRING:
1315 valueType = CERT_RDN_VISIBLE_STRING;
1316 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1317 bytesNeeded += dataLen;
1318 break;
1319 case ASN_GENERALSTRING:
1320 valueType = CERT_RDN_GENERAL_STRING;
1321 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1322 bytesNeeded += dataLen;
1323 break;
1324 case ASN_UNIVERSALSTRING:
1325 FIXME("ASN_UNIVERSALSTRING: unimplemented\n");
1326 SetLastError(CRYPT_E_ASN1_BADTAG);
1327 return FALSE;
1328 case ASN_BMPSTRING:
1329 valueType = CERT_RDN_BMP_STRING;
1330 bytesNeeded += dataLen;
1331 break;
1332 case ASN_UTF8STRING:
1333 valueType = CERT_RDN_UTF8_STRING;
1334 bytesNeeded += MultiByteToWideChar(CP_UTF8, 0,
1335 (LPSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) * 2;
1336 break;
1337 default:
1338 SetLastError(CRYPT_E_ASN1_BADTAG);
1339 return FALSE;
1340 }
1341
1342 if (!value)
1343 *pcbStructInfo = bytesNeeded;
1344 else if (*pcbStructInfo < bytesNeeded)
1345 {
1346 *pcbStructInfo = bytesNeeded;
1347 SetLastError(ERROR_MORE_DATA);
1348 ret = FALSE;
1349 }
1350 else
1351 {
1352 *pcbStructInfo = bytesNeeded;
1353 value->dwValueType = valueType;
1354 if (dataLen)
1355 {
1356 DWORD i;
1357
1358 assert(value->Value.pbData);
1359 switch (pbEncoded[0])
1360 {
1361 case ASN_OCTETSTRING:
1362 case ASN_NUMERICSTRING:
1363 case ASN_PRINTABLESTRING:
1364 case ASN_IA5STRING:
1365 case ASN_T61STRING:
1366 case ASN_VIDEOTEXSTRING:
1367 case ASN_GRAPHICSTRING:
1368 case ASN_VISIBLESTRING:
1369 case ASN_GENERALSTRING:
1370 value->Value.cbData = dataLen;
1371 if (dataLen)
1372 {
1373 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1374 memcpy(value->Value.pbData,
1375 pbEncoded + 1 + lenBytes, dataLen);
1376 else
1377 value->Value.pbData = (LPBYTE)pbEncoded + 1 +
1378 lenBytes;
1379 }
1380 break;
1381 case ASN_BMPSTRING:
1382 {
1383 LPWSTR str = (LPWSTR)value->Value.pbData;
1384
1385 value->Value.cbData = dataLen;
1386 for (i = 0; i < dataLen / 2; i++)
1387 str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
1388 pbEncoded[1 + lenBytes + 2 * i + 1];
1389 break;
1390 }
1391 case ASN_UTF8STRING:
1392 {
1393 LPWSTR str = (LPWSTR)value->Value.pbData;
1394
1395 value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
1396 (LPSTR)pbEncoded + 1 + lenBytes, dataLen,
1397 str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
1398 break;
1399 }
1400 }
1401 }
1402 else
1403 {
1404 value->Value.cbData = 0;
1405 value->Value.pbData = NULL;
1406 }
1407 }
1408 }
1409 return ret;
1410 }
1411
1412 static BOOL WINAPI CRYPT_AsnDecodeNameValue(DWORD dwCertEncodingType,
1413 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1414 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1415 {
1416 BOOL ret = TRUE;
1417
1418 __TRY
1419 {
1420 ret = CRYPT_AsnDecodeNameValueInternal(dwCertEncodingType,
1421 lpszStructType, pbEncoded, cbEncoded,
1422 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, pcbStructInfo);
1423 if (ret && pvStructInfo)
1424 {
1425 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1426 pcbStructInfo, *pcbStructInfo);
1427 if (ret)
1428 {
1429 CERT_NAME_VALUE *value;
1430
1431 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1432 pvStructInfo = *(BYTE **)pvStructInfo;
1433 value = (CERT_NAME_VALUE *)pvStructInfo;
1434 value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
1435 ret = CRYPT_AsnDecodeNameValueInternal(dwCertEncodingType,
1436 lpszStructType, pbEncoded, cbEncoded,
1437 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1438 pcbStructInfo);
1439 }
1440 }
1441 }
1442 __EXCEPT_PAGE_FAULT
1443 {
1444 SetLastError(STATUS_ACCESS_VIOLATION);
1445 ret = FALSE;
1446 }
1447 __ENDTRY
1448 return ret;
1449 }
1450
1451 static BOOL WINAPI CRYPT_AsnDecodeUnicodeNameValueInternal(
1452 DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
1453 DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
1454 void *pvStructInfo, DWORD *pcbStructInfo)
1455 {
1456 BOOL ret = TRUE;
1457 DWORD dataLen;
1458 CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
1459
1460 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1461 {
1462 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1463 DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
1464
1465 switch (pbEncoded[0])
1466 {
1467 case ASN_NUMERICSTRING:
1468 valueType = CERT_RDN_NUMERIC_STRING;
1469 bytesNeeded += dataLen * 2;
1470 break;
1471 case ASN_PRINTABLESTRING:
1472 valueType = CERT_RDN_PRINTABLE_STRING;
1473 bytesNeeded += dataLen * 2;
1474 break;
1475 case ASN_IA5STRING:
1476 valueType = CERT_RDN_IA5_STRING;
1477 bytesNeeded += dataLen * 2;
1478 break;
1479 case ASN_T61STRING:
1480 valueType = CERT_RDN_T61_STRING;
1481 bytesNeeded += dataLen * 2;
1482 break;
1483 case ASN_VIDEOTEXSTRING:
1484 valueType = CERT_RDN_VIDEOTEX_STRING;
1485 bytesNeeded += dataLen * 2;
1486 break;
1487 case ASN_GRAPHICSTRING:
1488 valueType = CERT_RDN_GRAPHIC_STRING;
1489 bytesNeeded += dataLen * 2;
1490 break;
1491 case ASN_VISIBLESTRING:
1492 valueType = CERT_RDN_VISIBLE_STRING;
1493 bytesNeeded += dataLen * 2;
1494 break;
1495 case ASN_GENERALSTRING:
1496 valueType = CERT_RDN_GENERAL_STRING;
1497 bytesNeeded += dataLen * 2;
1498 break;
1499 case ASN_UNIVERSALSTRING:
1500 valueType = CERT_RDN_UNIVERSAL_STRING;
1501 bytesNeeded += dataLen / 2;
1502 break;
1503 case ASN_BMPSTRING:
1504 valueType = CERT_RDN_BMP_STRING;
1505 bytesNeeded += dataLen;
1506 break;
1507 case ASN_UTF8STRING:
1508 valueType = CERT_RDN_UTF8_STRING;
1509 bytesNeeded += MultiByteToWideChar(CP_UTF8, 0,
1510 (LPSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) * 2;
1511 break;
1512 default:
1513 SetLastError(CRYPT_E_ASN1_BADTAG);
1514 return FALSE;
1515 }
1516
1517 if (!value)
1518 *pcbStructInfo = bytesNeeded;
1519 else if (*pcbStructInfo < bytesNeeded)
1520 {
1521 *pcbStructInfo = bytesNeeded;
1522 SetLastError(ERROR_MORE_DATA);
1523 ret = FALSE;
1524 }
1525 else
1526 {
1527 *pcbStructInfo = bytesNeeded;
1528 value->dwValueType = valueType;
1529 if (dataLen)
1530 {
1531 DWORD i;
1532 LPWSTR str = (LPWSTR)value->Value.pbData;
1533
1534 assert(value->Value.pbData);
1535 switch (pbEncoded[0])
1536 {
1537 case ASN_NUMERICSTRING:
1538 case ASN_PRINTABLESTRING:
1539 case ASN_IA5STRING:
1540 case ASN_T61STRING:
1541 case ASN_VIDEOTEXSTRING:
1542 case ASN_GRAPHICSTRING:
1543 case ASN_VISIBLESTRING:
1544 case ASN_GENERALSTRING:
1545 value->Value.cbData = dataLen * 2;
1546 for (i = 0; i < dataLen; i++)
1547 str[i] = pbEncoded[1 + lenBytes + i];
1548 break;
1549 case ASN_UNIVERSALSTRING:
1550 value->Value.cbData = dataLen / 2;
1551 for (i = 0; i < dataLen / 4; i++)
1552 str[i] = (pbEncoded[1 + lenBytes + 2 * i + 2] << 8)
1553 | pbEncoded[1 + lenBytes + 2 * i + 3];
1554 break;
1555 case ASN_BMPSTRING:
1556 value->Value.cbData = dataLen;
1557 for (i = 0; i < dataLen / 2; i++)
1558 str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
1559 pbEncoded[1 + lenBytes + 2 * i + 1];
1560 break;
1561 case ASN_UTF8STRING:
1562 value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
1563 (LPSTR)pbEncoded + 1 + lenBytes, dataLen,
1564 str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
1565 break;
1566 }
1567 }
1568 else
1569 {
1570 value->Value.cbData = 0;
1571 value->Value.pbData = NULL;
1572 }
1573 }
1574 }
1575 return ret;
1576 }
1577
1578 static BOOL WINAPI CRYPT_AsnDecodeUnicodeNameValue(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_AsnDecodeUnicodeNameValueInternal(dwCertEncodingType,
1587 lpszStructType, pbEncoded, cbEncoded,
1588 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, pcbStructInfo);
1589 if (ret && pvStructInfo)
1590 {
1591 ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1592 pcbStructInfo, *pcbStructInfo);
1593 if (ret)
1594 {
1595 CERT_NAME_VALUE *value;
1596
1597 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1598 pvStructInfo = *(BYTE **)pvStructInfo;
1599 value = (CERT_NAME_VALUE *)pvStructInfo;
1600 value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
1601 ret = CRYPT_AsnDecodeUnicodeNameValueInternal(
1602 dwCertEncodingType, lpszStructType, pbEncoded, cbEncoded,
1603 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1604 pcbStructInfo);
1605 }
1606 }
1607 }
1608 __EXCEPT_PAGE_FAULT
1609 {
1610 SetLastError(STATUS_ACCESS_VIOLATION);
1611 ret = FALSE;
1612 }
1613 __ENDTRY
1614 return ret;
1615 }
1616
1617 static BOOL WINAPI CRYPT_AsnDecodeRdnAttr(DWORD dwCertEncodingType,
1618 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1619 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1620 {
1621 BOOL ret;
1622 struct AsnDecodeSequenceItem items[] = {
1623 { ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
1624 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1625 offsetof(CERT_RDN_ATTR, pszObjId), 0 },
1626 { 0, offsetof(CERT_RDN_ATTR, dwValueType),
1627 CRYPT_AsnDecodeNameValueInternal, sizeof(CERT_NAME_VALUE),
1628 FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
1629 };
1630 CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
1631
1632 TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1633 pvStructInfo, *pcbStructInfo);
1634
1635 if (attr)
1636 TRACE("attr->pszObjId is %p\n", attr->pszObjId);
1637 ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
1638 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags, NULL,
1639 attr, pcbStructInfo, attr ? attr->pszObjId : NULL);
1640 if (attr)
1641 {
1642 TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
1643 debugstr_a(attr->pszObjId));
1644 TRACE("attr->dwValueType is %ld\n", attr->dwValueType);
1645 }
1646 TRACE("returning %d (%08lx)\n", ret, GetLastError());
1647 return ret;
1648 }
1649
1650 static BOOL WINAPI CRYPT_AsnDecodeRdn(DWORD dwCertEncodingType,
1651 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1652 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1653 {
1654 BOOL ret = TRUE;
1655 struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
1656 CRYPT_AsnDecodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
1657 offsetof(CERT_RDN_ATTR, pszObjId) };
1658 PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
1659
1660 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1661 pDecodePara, pvStructInfo, pcbStructInfo, rdn ? rdn->rgRDNAttr : NULL);
1662 return ret;
1663 }
1664
1665 static BOOL WINAPI CRYPT_AsnDecodeName(DWORD dwCertEncodingType,
1666 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1667 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1668 {
1669 BOOL ret = TRUE;
1670
1671 __TRY
1672 {
1673 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1674 CRYPT_AsnDecodeRdn, sizeof(CERT_RDN), TRUE,
1675 offsetof(CERT_RDN, rgRDNAttr) };
1676
1677 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1678 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1679 }
1680 __EXCEPT_PAGE_FAULT
1681 {
1682 SetLastError(STATUS_ACCESS_VIOLATION);
1683 ret = FALSE;
1684 }
1685 __ENDTRY
1686 return ret;
1687 }
1688
1689 static BOOL WINAPI CRYPT_AsnDecodeUnicodeRdnAttr(DWORD dwCertEncodingType,
1690 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1691 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1692 {
1693 BOOL ret;
1694 struct AsnDecodeSequenceItem items[] = {
1695 { ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
1696 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1697 offsetof(CERT_RDN_ATTR, pszObjId), 0 },
1698 { 0, offsetof(CERT_RDN_ATTR, dwValueType),
1699 CRYPT_AsnDecodeUnicodeNameValueInternal, sizeof(CERT_NAME_VALUE),
1700 FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
1701 };
1702 CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
1703
1704 TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1705 pvStructInfo, *pcbStructInfo);
1706
1707 if (attr)
1708 TRACE("attr->pszObjId is %p\n", attr->pszObjId);
1709 ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
1710 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags, NULL,
1711 attr, pcbStructInfo, attr ? attr->pszObjId : NULL);
1712 if (attr)
1713 {
1714 TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
1715 debugstr_a(attr->pszObjId));
1716 TRACE("attr->dwValueType is %ld\n", attr->dwValueType);
1717 }
1718 TRACE("returning %d (%08lx)\n", ret, GetLastError());
1719 return ret;
1720 }
1721
1722 static BOOL WINAPI CRYPT_AsnDecodeUnicodeRdn(DWORD dwCertEncodingType,
1723 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1724 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1725 {
1726 BOOL ret = TRUE;
1727 struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
1728 CRYPT_AsnDecodeUnicodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
1729 offsetof(CERT_RDN_ATTR, pszObjId) };
1730 PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
1731
1732 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1733 pDecodePara, pvStructInfo, pcbStructInfo, rdn ? rdn->rgRDNAttr : NULL);
1734 return ret;
1735 }
1736
1737 static BOOL WINAPI CRYPT_AsnDecodeUnicodeName(DWORD dwCertEncodingType,
1738 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1739 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1740 {
1741 BOOL ret = TRUE;
1742
1743 __TRY
1744 {
1745 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1746 CRYPT_AsnDecodeUnicodeRdn, sizeof(CERT_RDN), TRUE,
1747 offsetof(CERT_RDN, rgRDNAttr) };
1748
1749 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1750 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1751 }
1752 __EXCEPT_PAGE_FAULT
1753 {
1754 SetLastError(STATUS_ACCESS_VIOLATION);
1755 ret = FALSE;
1756 }
1757 __ENDTRY
1758 return ret;
1759 }
1760
1761 static BOOL WINAPI CRYPT_AsnDecodeCopyBytes(DWORD dwCertEncodingType,
1762 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1763 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1764 {
1765 BOOL ret = TRUE;
1766 DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB);
1767
1768 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1769 pDecodePara, pvStructInfo, *pcbStructInfo);
1770
1771 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1772 bytesNeeded += cbEncoded;
1773 if (!pvStructInfo)
1774 *pcbStructInfo = bytesNeeded;
1775 else if (*pcbStructInfo < bytesNeeded)
1776 {
1777 SetLastError(ERROR_MORE_DATA);
1778 *pcbStructInfo = bytesNeeded;
1779 ret = FALSE;
1780 }
1781 else
1782 {
1783 PCRYPT_OBJID_BLOB blob = (PCRYPT_OBJID_BLOB)pvStructInfo;
1784
1785 *pcbStructInfo = bytesNeeded;
1786 blob->cbData = cbEncoded;
1787 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1788 blob->pbData = (LPBYTE)pbEncoded;
1789 else
1790 {
1791 assert(blob->pbData);
1792 memcpy(blob->pbData, pbEncoded, blob->cbData);
1793 }
1794 }
1795 return ret;
1796 }
1797
1798 static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
1799 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1800 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1801 {
1802 CRYPT_ALGORITHM_IDENTIFIER *algo =
1803 (CRYPT_ALGORITHM_IDENTIFIER *)pvStructInfo;
1804 BOOL ret = TRUE;
1805 struct AsnDecodeSequenceItem items[] = {
1806 { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId),
1807 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1808 offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId), 0 },
1809 { 0, offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters),
1810 CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
1811 offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters.pbData), 0 },
1812 };
1813
1814 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1815 pDecodePara, pvStructInfo, *pcbStructInfo);
1816
1817 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1818 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1819 pDecodePara, pvStructInfo, pcbStructInfo, algo ? algo->pszObjId : NULL);
1820 if (ret && pvStructInfo)
1821 {
1822 TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
1823 debugstr_a(algo->pszObjId));
1824 }
1825 return ret;
1826 }
1827
1828 static BOOL WINAPI CRYPT_AsnDecodePubKeyInfoInternal(DWORD dwCertEncodingType,
1829 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1830 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1831 {
1832 BOOL ret = TRUE;
1833 struct AsnDecodeSequenceItem items[] = {
1834 { ASN_SEQUENCEOF, offsetof(CERT_PUBLIC_KEY_INFO, Algorithm),
1835 CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
1836 FALSE, TRUE, offsetof(CERT_PUBLIC_KEY_INFO,
1837 Algorithm.pszObjId) },
1838 { ASN_BITSTRING, offsetof(CERT_PUBLIC_KEY_INFO, PublicKey),
1839 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
1840 offsetof(CERT_PUBLIC_KEY_INFO, PublicKey.pbData) },
1841 };
1842 PCERT_PUBLIC_KEY_INFO info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
1843
1844 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1845 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1846 pDecodePara, pvStructInfo, pcbStructInfo, info ?
1847 info->Algorithm.Parameters.pbData : NULL);
1848 return ret;
1849 }
1850
1851 static BOOL WINAPI CRYPT_AsnDecodePubKeyInfo(DWORD dwCertEncodingType,
1852 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1853 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1854 {
1855 BOOL ret = TRUE;
1856
1857 __TRY
1858 {
1859 DWORD bytesNeeded;
1860
1861 if ((ret = CRYPT_AsnDecodePubKeyInfoInternal(dwCertEncodingType,
1862 lpszStructType, pbEncoded, cbEncoded,
1863 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
1864 {
1865 if (!pvStructInfo)
1866 *pcbStructInfo = bytesNeeded;
1867 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
1868 pvStructInfo, pcbStructInfo, bytesNeeded)))
1869 {
1870 PCERT_PUBLIC_KEY_INFO info;
1871
1872 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1873 pvStructInfo = *(BYTE **)pvStructInfo;
1874 info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
1875 info->Algorithm.Parameters.pbData = (BYTE *)pvStructInfo +
1876 sizeof(CERT_PUBLIC_KEY_INFO);
1877 ret = CRYPT_AsnDecodePubKeyInfoInternal(dwCertEncodingType,
1878 lpszStructType, pbEncoded, cbEncoded,
1879 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1880 &bytesNeeded);
1881 }
1882 }
1883 }
1884 __EXCEPT_PAGE_FAULT
1885 {
1886 SetLastError(STATUS_ACCESS_VIOLATION);
1887 ret = FALSE;
1888 }
1889 __ENDTRY
1890 return ret;
1891 }
1892
1893 static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
1894 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1895 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1896 {
1897 BOOL ret;
1898
1899 if (cbEncoded < 3)
1900 {
1901 SetLastError(CRYPT_E_ASN1_CORRUPT);
1902 return FALSE;
1903 }
1904 if (GET_LEN_BYTES(pbEncoded[1]) > 1)
1905 {
1906 SetLastError(CRYPT_E_ASN1_CORRUPT);
1907 return FALSE;
1908 }
1909 if (pbEncoded[1] > 1)
1910 {
1911 SetLastError(CRYPT_E_ASN1_CORRUPT);
1912 return FALSE;
1913 }
1914 if (!pvStructInfo)
1915 {
1916 *pcbStructInfo = sizeof(BOOL);
1917 ret = TRUE;
1918 }
1919 else if (*pcbStructInfo < sizeof(BOOL))
1920 {
1921 *pcbStructInfo = sizeof(BOOL);
1922 SetLastError(ERROR_MORE_DATA);
1923 ret = FALSE;
1924 }
1925 else
1926 {
1927 *(BOOL *)pvStructInfo = pbEncoded[2] ? TRUE : FALSE;
1928 ret = TRUE;
1929 }
1930 TRACE("returning %d (%08lx)\n", ret, GetLastError());
1931 return ret;
1932 }
1933
1934 static BOOL WINAPI CRYPT_AsnDecodeAltNameEntry(DWORD dwCertEncodingType,
1935 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1936 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1937 {
1938 PCERT_ALT_NAME_ENTRY entry = (PCERT_ALT_NAME_ENTRY)pvStructInfo;
1939 DWORD dataLen, lenBytes, bytesNeeded = sizeof(CERT_ALT_NAME_ENTRY);
1940 BOOL ret;
1941
1942 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1943 pDecodePara, pvStructInfo, *pcbStructInfo);
1944
1945 if (cbEncoded < 2)
1946 {
1947 SetLastError(CRYPT_E_ASN1_CORRUPT);
1948 return FALSE;
1949 }
1950 if ((pbEncoded[0] & ASN_FLAGS_MASK) != ASN_CONTEXT)
1951 {
1952 SetLastError(CRYPT_E_ASN1_BADTAG);
1953 return FALSE;
1954 }
1955 lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1956 if (1 + lenBytes > cbEncoded)
1957 {
1958 SetLastError(CRYPT_E_ASN1_CORRUPT);
1959 return FALSE;
1960 }
1961 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1962 {
1963 switch (pbEncoded[0] & ASN_TYPE_MASK)
1964 {
1965 case 1: /* rfc822Name */
1966 case 2: /* dNSName */
1967 case 6: /* uniformResourceIdentifier */
1968 bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
1969 break;
1970 case 7: /* iPAddress */
1971 bytesNeeded += dataLen;
1972 break;
1973 case 8: /* registeredID */
1974 /* FIXME: decode as OID */
1975 case 0: /* otherName */
1976 case 4: /* directoryName */
1977 FIXME("stub\n");
1978 SetLastError(CRYPT_E_ASN1_BADTAG);
1979 ret = FALSE;
1980 break;
1981 case 3: /* x400Address, unimplemented */
1982 case 5: /* ediPartyName, unimplemented */
1983 SetLastError(CRYPT_E_ASN1_BADTAG);
1984 ret = FALSE;
1985 break;
1986 default:
1987 SetLastError(CRYPT_E_ASN1_CORRUPT);
1988 ret = FALSE;
1989 }
1990 if (ret)
1991 {
1992 if (!entry)
1993 *pcbStructInfo = bytesNeeded;
1994 else if (*pcbStructInfo < bytesNeeded)
1995 {
1996 *pcbStructInfo = bytesNeeded;
1997 SetLastError(ERROR_MORE_DATA);
1998 ret = FALSE;
1999 }
2000 else
2001 {
2002 *pcbStructInfo = bytesNeeded;
2003 /* MS used values one greater than the asn1 ones.. sigh */
2004 entry->dwAltNameChoice = (pbEncoded[0] & 0x7f) + 1;
2005 switch (pbEncoded[0] & ASN_TYPE_MASK)
2006 {
2007 case 1: /* rfc822Name */
2008 case 2: /* dNSName */
2009 case 6: /* uniformResourceIdentifier */
2010 {
2011 DWORD i;
2012
2013 for (i = 0; i < dataLen; i++)
2014 entry->u.pwszURL[i] =
2015 (WCHAR)pbEncoded[1 + lenBytes + i];
2016 entry->u.pwszURL[i] = 0;
2017 TRACE("URL is %p (%s)\n", entry->u.pwszURL,
2018 debugstr_w(entry->u.pwszURL));
2019 break;
2020 }
2021 case 7: /* iPAddress */
2022 /* The next data pointer is in the pwszURL spot, that is,
2023 * the first 4 bytes. Need to move it to the next spot.
2024 */
2025 entry->u.IPAddress.pbData = (LPBYTE)entry->u.pwszURL;
2026 entry->u.IPAddress.cbData = dataLen;
2027 memcpy(entry->u.IPAddress.pbData, pbEncoded + 1 + lenBytes,
2028 dataLen);
2029 break;
2030 }
2031 }
2032 }
2033 }
2034 return ret;
2035 }
2036
2037 static BOOL WINAPI CRYPT_AsnDecodeAltNameInternal(DWORD dwCertEncodingType,
2038 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2039 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2040 {
2041 BOOL ret = TRUE;
2042 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2043 CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
2044 offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
2045 PCERT_ALT_NAME_INFO info = (PCERT_ALT_NAME_INFO)pvStructInfo;
2046
2047 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2048 pDecodePara, pvStructInfo, *pcbStructInfo);
2049
2050 if (info)
2051 TRACE("info->rgAltEntry is %p\n", info->rgAltEntry);
2052 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2053 pDecodePara, pvStructInfo, pcbStructInfo, info ? info->rgAltEntry : NULL);
2054 return ret;
2055 }
2056
2057 static BOOL WINAPI CRYPT_AsnDecodeAltName(DWORD dwCertEncodingType,
2058 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2059 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2060 {
2061 BOOL ret = TRUE;
2062
2063 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2064 pDecodePara, pvStructInfo, *pcbStructInfo);
2065
2066 __TRY
2067 {
2068 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2069 CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
2070 offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
2071
2072 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2073 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
2074 }
2075 __EXCEPT_PAGE_FAULT
2076 {
2077 SetLastError(STATUS_ACCESS_VIOLATION);
2078 ret = FALSE;
2079 }
2080 __ENDTRY
2081 return ret;
2082 }
2083
2084 struct PATH_LEN_CONSTRAINT
2085 {
2086 BOOL fPathLenConstraint;
2087 DWORD dwPathLenConstraint;
2088 };
2089
2090 static BOOL WINAPI CRYPT_AsnDecodePathLenConstraint(DWORD dwCertEncodingType,
2091 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2092 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2093 {
2094 BOOL ret = TRUE;
2095
2096 TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2097 pvStructInfo, *pcbStructInfo);
2098
2099 if (cbEncoded)
2100 {
2101 if (pbEncoded[0] == ASN_INTEGER)
2102 {
2103 DWORD bytesNeeded = sizeof(struct PATH_LEN_CONSTRAINT);
2104
2105 if (!pvStructInfo)
2106 *pcbStructInfo = bytesNeeded;
2107 else if (*pcbStructInfo < bytesNeeded)
2108 {
2109 SetLastError(ERROR_MORE_DATA);
2110 *pcbStructInfo = bytesNeeded;
2111 ret = FALSE;
2112 }
2113 else
2114 {
2115 struct PATH_LEN_CONSTRAINT *constraint =
2116 (struct PATH_LEN_CONSTRAINT *)pvStructInfo;
2117 DWORD size = sizeof(constraint->dwPathLenConstraint);
2118
2119 ret = CRYPT_AsnDecodeInt(dwCertEncodingType, X509_INTEGER,
2120 pbEncoded, cbEncoded, 0, NULL,
2121 &constraint->dwPathLenConstraint, &size);
2122 if (ret)
2123 constraint->fPathLenConstraint = TRUE;
2124 TRACE("got an int, dwPathLenConstraint is %ld\n",
2125 constraint->dwPathLenConstraint);
2126 }
2127 }
2128 else
2129 {
2130 SetLastError(CRYPT_E_ASN1_CORRUPT);
2131 ret = FALSE;
2132 }
2133 }
2134 TRACE("returning %d (%08lx)\n", ret, GetLastError());
2135 return ret;
2136 }
2137
2138 static BOOL WINAPI CRYPT_AsnDecodeSubtreeConstraints(DWORD dwCertEncodingType,
2139 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2140 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2141 {
2142 BOOL ret;
2143 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2144 CRYPT_AsnDecodeCopyBytes, sizeof(CERT_NAME_BLOB), TRUE,
2145 offsetof(CERT_NAME_BLOB, pbData) };
2146 struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
2147
2148 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2149 pDecodePara, pvStructInfo, *pcbStructInfo);
2150
2151 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2152 pDecodePara, pvStructInfo, pcbStructInfo,
2153 entries ? entries->rgItems : NULL);
2154 TRACE("Returning %d (%08lx)\n", ret, GetLastError());
2155 return ret;
2156 }
2157
2158 static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints(DWORD dwCertEncodingType,
2159 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2160 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2161 {
2162 BOOL ret;
2163
2164 __TRY
2165 {
2166 struct AsnDecodeSequenceItem items[] = {
2167 { ASN_BITSTRING, offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType),
2168 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
2169 offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType.pbData), 0 },
2170 { ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
2171 fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
2172 sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
2173 { ASN_SEQUENCEOF, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
2174 cSubtreesConstraint), CRYPT_AsnDecodeSubtreeConstraints,
2175 sizeof(struct GenericArray), TRUE, TRUE,
2176 offsetof(CERT_BASIC_CONSTRAINTS_INFO, rgSubtreesConstraint), 0 },
2177 };
2178
2179 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2180 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2181 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
2182 }
2183 __EXCEPT_PAGE_FAULT
2184 {
2185 SetLastError(STATUS_ACCESS_VIOLATION);
2186 ret = FALSE;
2187 }
2188 __ENDTRY
2189 return ret;
2190 }
2191
2192 static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints2(DWORD dwCertEncodingType,
2193 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2194 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2195 {
2196 BOOL ret;
2197
2198 __TRY
2199 {
2200 struct AsnDecodeSequenceItem items[] = {
2201 { ASN_BOOL, offsetof(CERT_BASIC_CONSTRAINTS2_INFO, fCA),
2202 CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0, 0 },
2203 { ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS2_INFO,
2204 fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
2205 sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
2206 };
2207
2208 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2209 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2210 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
2211 }
2212 __EXCEPT_PAGE_FAULT
2213 {
2214 SetLastError(STATUS_ACCESS_VIOLATION);
2215 ret = FALSE;
2216 }
2217 __ENDTRY
2218 return ret;
2219 }
2220
2221 #define RSA1_MAGIC 0x31415352
2222
2223 struct DECODED_RSA_PUB_KEY
2224 {
2225 DWORD pubexp;
2226 CRYPT_INTEGER_BLOB modulus;
2227 };
2228
2229 static BOOL WINAPI CRYPT_AsnDecodeRsaPubKey(DWORD dwCertEncodingType,
2230 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2231 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2232 {
2233 BOOL ret;
2234
2235 __TRY
2236 {
2237 struct AsnDecodeSequenceItem items[] = {
2238 { ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, modulus),
2239 CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
2240 FALSE, TRUE, offsetof(struct DECODED_RSA_PUB_KEY, modulus.pbData),
2241 0 },
2242 { ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, pubexp),
2243 CRYPT_AsnDecodeInt, sizeof(DWORD), FALSE, FALSE, 0, 0 },
2244 };
2245 struct DECODED_RSA_PUB_KEY *decodedKey = NULL;
2246 DWORD size = 0;
2247
2248 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2249 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded,
2250 CRYPT_DECODE_ALLOC_FLAG, NULL, &decodedKey, &size, NULL);
2251 if (ret)
2252 {
2253 DWORD bytesNeeded = sizeof(BLOBHEADER) + sizeof(RSAPUBKEY) +
2254 decodedKey->modulus.cbData;
2255
2256 if (!pvStructInfo)
2257 {
2258 *pcbStructInfo = bytesNeeded;
2259 ret = TRUE;
2260 }
2261 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2262 pvStructInfo, pcbStructInfo, bytesNeeded)))
2263 {
2264 BLOBHEADER *hdr;
2265 RSAPUBKEY *rsaPubKey;
2266
2267 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2268 pvStructInfo = *(BYTE **)pvStructInfo;
2269 hdr = (BLOBHEADER *)pvStructInfo;
2270 hdr->bType = PUBLICKEYBLOB;
2271 hdr->bVersion = CUR_BLOB_VERSION;
2272 hdr->reserved = 0;
2273 hdr->aiKeyAlg = CALG_RSA_KEYX;
2274 rsaPubKey = (RSAPUBKEY *)((BYTE *)pvStructInfo +
2275 sizeof(BLOBHEADER));
2276 rsaPubKey->magic = RSA1_MAGIC;
2277 rsaPubKey->pubexp = decodedKey->pubexp;
2278 rsaPubKey->bitlen = decodedKey->modulus.cbData * 8;
2279 memcpy((BYTE *)pvStructInfo + sizeof(BLOBHEADER) +
2280 sizeof(RSAPUBKEY), decodedKey->modulus.pbData,
2281 decodedKey->modulus.cbData);
2282 }
2283 LocalFree(decodedKey);
2284 }
2285 }
2286 __EXCEPT_PAGE_FAULT
2287 {
2288 SetLastError(STATUS_ACCESS_VIOLATION);
2289 ret = FALSE;
2290 }
2291 __ENDTRY
2292 return ret;
2293 }
2294
2295 static BOOL WINAPI CRYPT_AsnDecodeOctetsInternal(DWORD dwCertEncodingType,
2296 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2297 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2298 {
2299 BOOL ret;
2300 DWORD bytesNeeded, dataLen;
2301
2302 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2303 pDecodePara, pvStructInfo, *pcbStructInfo);
2304
2305 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2306 {
2307 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2308 bytesNeeded = sizeof(CRYPT_DATA_BLOB);
2309 else
2310 bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
2311 if (!pvStructInfo)
2312 *pcbStructInfo = bytesNeeded;
2313 else if (*pcbStructInfo < bytesNeeded)
2314 {
2315 SetLastError(ERROR_MORE_DATA);
2316 *pcbStructInfo = bytesNeeded;
2317 ret = FALSE;
2318 }
2319 else
2320 {
2321 CRYPT_DATA_BLOB *blob;
2322 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2323
2324 blob = (CRYPT_DATA_BLOB *)pvStructInfo;
2325 blob->cbData = dataLen;
2326 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2327 blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
2328 else
2329 {
2330 assert(blob->pbData);
2331 if (blob->cbData)
2332 memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
2333 blob->cbData);
2334 }
2335 }
2336 }
2337 return ret;
2338 }
2339
2340 static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
2341 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2342 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2343 {
2344 BOOL ret;
2345
2346 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2347 pDecodePara, pvStructInfo, *pcbStructInfo);
2348
2349 __TRY
2350 {
2351 DWORD bytesNeeded;
2352
2353 if (!cbEncoded)
2354 {
2355 SetLastError(CRYPT_E_ASN1_CORRUPT);
2356 ret = FALSE;
2357 }
2358 else if (pbEncoded[0] != ASN_OCTETSTRING)
2359 {
2360 SetLastError(CRYPT_E_ASN1_BADTAG);
2361 ret = FALSE;
2362 }
2363 else if ((ret = CRYPT_AsnDecodeOctetsInternal(dwCertEncodingType,
2364 lpszStructType, pbEncoded, cbEncoded,
2365 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2366 {
2367 if (!pvStructInfo)
2368 *pcbStructInfo = bytesNeeded;
2369 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2370 pvStructInfo, pcbStructInfo, bytesNeeded)))
2371 {
2372 CRYPT_DATA_BLOB *blob;
2373
2374 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2375 pvStructInfo = *(BYTE **)pvStructInfo;
2376 blob = (CRYPT_DATA_BLOB *)pvStructInfo;
2377 blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_DATA_BLOB);
2378 ret = CRYPT_AsnDecodeOctetsInternal(dwCertEncodingType,
2379 lpszStructType, pbEncoded, cbEncoded,
2380 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
2381 &bytesNeeded);
2382 }
2383 }
2384 }
2385 __EXCEPT_PAGE_FAULT
2386 {
2387 SetLastError(STATUS_ACCESS_VIOLATION);
2388 ret = FALSE;
2389 }
2390 __ENDTRY
2391 return ret;
2392 }
2393
2394 static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
2395 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2396 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2397 {
2398 BOOL ret;
2399
2400 TRACE("(%p, %ld, 0x%08lx, %p, %p, %ld)\n", pbEncoded, cbEncoded, dwFlags,
2401 pDecodePara, pvStructInfo, *pcbStructInfo);
2402
2403 if (pbEncoded[0] == ASN_BITSTRING)
2404 {
2405 DWORD bytesNeeded, dataLen;
2406
2407 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2408 {
2409 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2410 bytesNeeded = sizeof(CRYPT_BIT_BLOB);
2411 else
2412 bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
2413 if (!pvStructInfo)
2414 *pcbStructInfo = bytesNeeded;
2415 else if (*pcbStructInfo < bytesNeeded)
2416 {
2417 *pcbStructInfo = bytesNeeded;
2418 SetLastError(ERROR_MORE_DATA);
2419 ret = FALSE;
2420 }
2421 else
2422 {
2423 CRYPT_BIT_BLOB *blob;
2424
2425 blob = (CRYPT_BIT_BLOB *)pvStructInfo;
2426 blob->cbData = dataLen - 1;
2427 blob->cUnusedBits = *(pbEncoded + 1 +
2428 GET_LEN_BYTES(pbEncoded[1]));
2429 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2430 {
2431 blob->pbData = (BYTE *)pbEncoded + 2 +
2432 GET_LEN_BYTES(pbEncoded[1]);
2433 }
2434 else
2435 {
2436 assert(blob->pbData);
2437 if (blob->cbData)
2438 {
2439 BYTE mask = 0xff << blob->cUnusedBits;
2440
2441 memcpy(blob->pbData, pbEncoded + 2 +
2442 GET_LEN_BYTES(pbEncoded[1]), blob->cbData);
2443 blob->pbData[blob->cbData - 1] &= mask;
2444 }
2445 }
2446 }
2447 }
2448 }
2449 else
2450 {
2451 SetLastError(CRYPT_E_ASN1_BADTAG);
2452 ret = FALSE;
2453 }
2454 TRACE("returning %d (%08lx)\n", ret, GetLastError());
2455 return ret;
2456 }
2457
2458 static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
2459 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2460 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2461 {
2462 BOOL ret;
2463
2464 TRACE("(%p, %ld, 0x%08lx, %p, %p, %p)\n", pbEncoded, cbEncoded, dwFlags,
2465 pDecodePara, pvStructInfo, pcbStructInfo);
2466
2467 __TRY
2468 {
2469 DWORD bytesNeeded;
2470
2471 if ((ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType,
2472 lpszStructType, pbEncoded, cbEncoded,
2473 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2474 {
2475 if (!pvStructInfo)
2476 *pcbStructInfo = bytesNeeded;
2477 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2478 pvStructInfo, pcbStructInfo, bytesNeeded)))
2479 {
2480 CRYPT_BIT_BLOB *blob;
2481
2482 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2483 pvStructInfo = *(BYTE **)pvStructInfo;
2484 blob = (CRYPT_BIT_BLOB *)pvStructInfo;
2485 blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_BIT_BLOB);
2486 ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType,
2487 lpszStructType, pbEncoded, cbEncoded,
2488 dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
2489 &bytesNeeded);
2490 }
2491 }
2492 }
2493 __EXCEPT_PAGE_FAULT
2494 {
2495 SetLastError(STATUS_ACCESS_VIOLATION);
2496 ret = FALSE;
2497 }
2498 __ENDTRY
2499 TRACE("returning %d (%08lx)\n", ret, GetLastError());
2500 return ret;
2501 }
2502
2503 static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
2504 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2505 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2506 {
2507 BOOL ret;
2508
2509 if (!pvStructInfo)
2510 {
2511 *pcbStructInfo = sizeof(int);
2512 return TRUE;
2513 }
2514 __TRY
2515 {
2516 BYTE buf[sizeof(CRYPT_INTEGER_BLOB) + sizeof(int)];
2517 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)buf;
2518 DWORD size = sizeof(buf);
2519
2520 blob->pbData = buf + sizeof(CRYPT_INTEGER_BLOB);
2521 ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
2522 X509_MULTI_BYTE_INTEGER, pbEncoded, cbEncoded, 0, NULL, &buf, &size);
2523 if (ret)
2524 {
2525 if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2526 pvStructInfo, pcbStructInfo, sizeof(int))))
2527 {
2528 int val, i;
2529
2530 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2531 pvStructInfo = *(BYTE **)pvStructInfo;
2532 if (blob->pbData[blob->cbData - 1] & 0x80)
2533 {
2534 /* initialize to a negative value to sign-extend */
2535 val = -1;
2536 }
2537 else
2538 val = 0;
2539 for (i = 0; i < blob->cbData; i++)
2540 {
2541 val <<= 8;
2542 val |= blob->pbData[blob->cbData - i - 1];
2543 }
2544 memcpy(pvStructInfo, &val, sizeof(int));
2545 }
2546 }
2547 else if (GetLastError() == ERROR_MORE_DATA)
2548 SetLastError(CRYPT_E_ASN1_LARGE);
2549 }
2550 __EXCEPT_PAGE_FAULT
2551 {
2552 SetLastError(STATUS_ACCESS_VIOLATION);
2553 ret = FALSE;
2554 }
2555 __ENDTRY
2556 return ret;
2557 }
2558
2559 static BOOL WINAPI CRYPT_AsnDecodeIntegerInternal(DWORD dwCertEncodingType,
2560 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2561 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2562 {
2563 BOOL ret;
2564
2565 if (pbEncoded[0] == ASN_INTEGER)
2566 {
2567 DWORD bytesNeeded, dataLen;
2568
2569 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2570 {
2571 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2572
2573 bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
2574 if (!pvStructInfo)
2575 *pcbStructInfo = bytesNeeded;
2576 else if (*pcbStructInfo < bytesNeeded)
2577 {
2578 *pcbStructInfo = bytesNeeded;
2579 SetLastError(ERROR_MORE_DATA);
2580 ret = FALSE;
2581 }
2582 else
2583 {
2584 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2585
2586 blob->cbData = dataLen;
2587 assert(blob->pbData);
2588 if (blob->cbData)
2589 {
2590 DWORD i;
2591
2592 for (i = 0; i < blob->cbData; i++)
2593 {
2594 blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
2595 dataLen - i - 1);
2596 }
2597 }
2598 }
2599 }
2600 }
2601 else
2602 {
2603 SetLastError(CRYPT_E_ASN1_BADTAG);
2604 ret = FALSE;
2605 }
2606 return ret;
2607 }
2608
2609 static BOOL WINAPI CRYPT_AsnDecodeInteger(DWORD dwCertEncodingType,
2610 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2611 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2612 {
2613 BOOL ret;
2614
2615 __TRY
2616 {
2617 DWORD bytesNeeded;
2618
2619 if ((ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
2620 lpszStructType, pbEncoded, cbEncoded,
2621 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2622 {
2623 if (!pvStructInfo)
2624 *pcbStructInfo = bytesNeeded;
2625 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2626 pvStructInfo, pcbStructInfo, bytesNeeded)))
2627 {
2628 CRYPT_INTEGER_BLOB *blob;
2629
2630 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2631 pvStructInfo = *(BYTE **)pvStructInfo;
2632 blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2633 blob->pbData = (BYTE *)pvStructInfo +
2634 sizeof(CRYPT_INTEGER_BLOB);
2635 ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
2636 lpszStructType, pbEncoded, cbEncoded,
2637 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, pvStructInfo,
2638 &bytesNeeded);
2639 }
2640 }
2641 }
2642 __EXCEPT_PAGE_FAULT
2643 {
2644 SetLastError(STATUS_ACCESS_VIOLATION);
2645 ret = FALSE;
2646 }
2647 __ENDTRY
2648 return ret;
2649 }
2650
2651 static BOOL WINAPI CRYPT_AsnDecodeUnsignedIntegerInternal(
2652 DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
2653 DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
2654 void *pvStructInfo, DWORD *pcbStructInfo)
2655 {
2656 BOOL ret;
2657
2658 if (pbEncoded[0] == ASN_INTEGER)
2659 {
2660 DWORD bytesNeeded, dataLen;
2661
2662 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2663 {
2664 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2665
2666 bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
2667 if (!pvStructInfo)
2668 *pcbStructInfo = bytesNeeded;
2669 else if (*pcbStructInfo < bytesNeeded)
2670 {
2671 *pcbStructInfo = bytesNeeded;
2672 SetLastError(ERROR_MORE_DATA);
2673 ret = FALSE;
2674 }
2675 else
2676 {
2677 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2678
2679 blob->cbData = dataLen;
2680 assert(blob->pbData);
2681 /* remove leading zero byte if it exists */
2682 if (blob->cbData && *(pbEncoded + 1 + lenBytes) == 0)
2683 {
2684 blob->cbData--;
2685 blob->pbData++;
2686 }
2687 if (blob->cbData)
2688 {
2689 DWORD i;
2690
2691 for (i = 0; i < blob->cbData; i++)
2692 {
2693 blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
2694 dataLen - i - 1);
2695 }
2696 }
2697 }
2698 }
2699 }
2700 else
2701 {
2702 SetLastError(CRYPT_E_ASN1_BADTAG);
2703 ret = FALSE;
2704 }
2705 return ret;
2706 }
2707
2708 static BOOL WINAPI CRYPT_AsnDecodeUnsignedInteger(DWORD dwCertEncodingType,
2709 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2710 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2711 {
2712 BOOL ret;
2713
2714 __TRY
2715 {
2716 DWORD bytesNeeded;
2717
2718 if ((ret = CRYPT_AsnDecodeUnsignedIntegerInternal(dwCertEncodingType,
2719 lpszStructType, pbEncoded, cbEncoded,
2720 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2721 {
2722 if (!pvStructInfo)
2723 *pcbStructInfo = bytesNeeded;
2724 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2725 pvStructInfo, pcbStructInfo, bytesNeeded)))
2726 {
2727 CRYPT_INTEGER_BLOB *blob;
2728
2729 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2730 pvStructInfo = *(BYTE **)pvStructInfo;
2731 blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2732 blob->pbData = (BYTE *)pvStructInfo +
2733 sizeof(CRYPT_INTEGER_BLOB);
2734 ret = CRYPT_AsnDecodeUnsignedIntegerInternal(dwCertEncodingType,
2735 lpszStructType, pbEncoded, cbEncoded,
2736 dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, pvStructInfo,
2737 &bytesNeeded);
2738 }
2739 }
2740 }
2741 __EXCEPT_PAGE_FAULT
2742 {
2743 SetLastError(STATUS_ACCESS_VIOLATION);
2744 ret = FALSE;
2745 }
2746 __ENDTRY
2747 return ret;
2748 }
2749
2750 static BOOL WINAPI CRYPT_AsnDecodeEnumerated(DWORD dwCertEncodingType,
2751 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2752 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2753 {
2754 BOOL ret;
2755
2756 if (!pvStructInfo)
2757 {
2758 *pcbStructInfo = sizeof(int);
2759 return TRUE;
2760 }
2761 __TRY
2762 {
2763 if (pbEncoded[0] == ASN_ENUMERATED)
2764 {
2765 unsigned int val = 0, i;
2766
2767 if (cbEncoded <= 1)
2768 {
2769 SetLastError(CRYPT_E_ASN1_EOD);
2770 ret = FALSE;
2771 }
2772 else if (pbEncoded[1] == 0)
2773 {
2774 SetLastError(CRYPT_E_ASN1_CORRUPT);
2775 ret = FALSE;
2776 }
2777 else
2778 {
2779 /* A little strange looking, but we have to accept a sign byte:
2780 * 0xffffffff gets encoded as 0a 05 00 ff ff ff ff. Also,
2781 * assuming a small length is okay here, it has to be in short
2782 * form.
2783 */
2784 if (pbEncoded[1] > sizeof(unsigned int) + 1)
2785 {
2786 SetLastError(CRYPT_E_ASN1_LARGE);
2787 return FALSE;
2788 }
2789 for (i = 0; i < pbEncoded[1]; i++)
2790 {
2791 val <<= 8;
2792 val |= pbEncoded[2 + i];
2793 }
2794 if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2795 pvStructInfo, pcbStructInfo, sizeof(unsigned int))))
2796 {
2797 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2798 pvStructInfo = *(BYTE **)pvStructInfo;
2799 memcpy(pvStructInfo, &val, sizeof(unsigned int));
2800 }
2801 }
2802 }
2803 else
2804 {
2805 SetLastError(CRYPT_E_ASN1_BADTAG);
2806 ret = FALSE;
2807 }
2808 }
2809 __EXCEPT_PAGE_FAULT
2810 {
2811 SetLastError(STATUS_ACCESS_VIOLATION);
2812 ret = FALSE;
2813 }
2814 __ENDTRY
2815 return ret;
2816 }
2817
2818 /* Modifies word, pbEncoded, and len, and magically sets a value ret to FALSE
2819 * if it fails.
2820 */
2821 #define CRYPT_TIME_GET_DIGITS(pbEncoded, len, numDigits, word) \
2822 do { \
2823 BYTE i; \
2824 \
2825 (word) = 0; \
2826 for (i = 0; (len) > 0 && i < (numDigits); i++, (len)--) \
2827 { \
2828 if (!isdigit(*(pbEncoded))) \
2829 { \
2830 SetLastError(CRYPT_E_ASN1_CORRUPT); \
2831 ret = FALSE; \
2832 } \
2833 else \
2834 { \
2835 (word) *= 10; \
2836 (word) += *(pbEncoded)++ - '0'; \
2837 } \
2838 } \
2839 } while (0)
2840
2841 static BOOL CRYPT_AsnDecodeTimeZone(const BYTE *pbEncoded, DWORD len,
2842 SYSTEMTIME *sysTime)
2843 {
2844 BOOL ret;
2845
2846 __TRY
2847 {
2848 ret = TRUE;
2849 if (len >= 3 && (*pbEncoded == '+' || *pbEncoded == '-'))
2850 {
2851 WORD hours, minutes = 0;
2852 BYTE sign = *pbEncoded++;
2853
2854 len--;
2855 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, hours);
2856 if (ret && hours >= 24)
2857 {
2858 SetLastError(CRYPT_E_ASN1_CORRUPT);
2859 ret = FALSE;
2860 }
2861 else if (len >= 2)
2862 {
2863 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, minutes);
2864 if (ret && minutes >= 60)
2865 {
2866 SetLastError(CRYPT_E_ASN1_CORRUPT);
2867 ret = FALSE;
2868 }
2869 }
2870 if (ret)
2871 {
2872 if (sign == '+')
2873 {
2874 sysTime->wHour += hours;
2875 sysTime->wMinute += minutes;
2876 }
2877 else
2878 {
2879 if (hours > sysTime->wHour)
2880 {
2881 sysTime->wDay--;
2882 sysTime->wHour = 24 - (hours - sysTime->wHour);
2883 }
2884 else
2885 sysTime->wHour -= hours;
2886 if (minutes > sysTime->wMinute)
2887 {
2888 sysTime->wHour--;
2889 sysTime->wMinute = 60 - (minutes - sysTime->wMinute);
2890 }
2891 else
2892 sysTime->wMinute -= minutes;
2893 }
2894 }
2895 }
2896 }
2897 __EXCEPT_PAGE_FAULT
2898 {
2899 SetLastError(STATUS_ACCESS_VIOLATION);
2900 ret = FALSE;
2901 }
2902 __ENDTRY
2903 return ret;
2904 }
2905
2906 #define MIN_ENCODED_TIME_LENGTH 10
2907
2908 static BOOL WINAPI CRYPT_AsnDecodeUtcTime(DWORD dwCertEncodingType,
2909 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2910 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2911 {
2912 BOOL ret;
2913
2914 if (!pvStructInfo)
2915 {
2916 *pcbStructInfo = sizeof(FILETIME);
2917 return TRUE;
2918 }
2919 __TRY
2920 {
2921 ret = TRUE;
2922 if (pbEncoded[0] == ASN_UTCTIME)
2923 {
2924 if (cbEncoded <= 1)
2925 {
2926 SetLastError(CRYPT_E_ASN1_EOD);
2927 ret = FALSE;
2928 }
2929 else if (pbEncoded[1] > 0x7f)
2930 {
2931 /* long-form date strings really can't be valid */
2932 SetLastError(CRYPT_E_ASN1_CORRUPT);
2933 ret = FALSE;
2934 }
2935 else
2936 {
2937 SYSTEMTIME sysTime = { 0 };
2938 BYTE len = pbEncoded[1];
2939
2940 if (len < MIN_ENCODED_TIME_LENGTH)
2941 {
2942 SetLastError(CRYPT_E_ASN1_CORRUPT);
2943 ret = FALSE;
2944 }
2945 else
2946 {
2947 pbEncoded += 2;
2948 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wYear);
2949 if (sysTime.wYear >= 50)
2950 sysTime.wYear += 1900;
2951 else
2952 sysTime.wYear += 2000;
2953 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
2954 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
2955 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
2956 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMinute);
2957 if (ret && len > 0)
2958 {
2959 if (len >= 2 && isdigit(*pbEncoded) &&
2960 isdigit(*(pbEncoded + 1)))
2961 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
2962 sysTime.wSecond);
2963 else if (isdigit(*pbEncoded))
2964 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 1,
2965 sysTime.wSecond);
2966 if (ret)
2967 ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
2968 &sysTime);
2969 }
2970 if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags,
2971 pDecodePara, pvStructInfo, pcbStructInfo,
2972 sizeof(FILETIME))))
2973 {
2974 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2975 pvStructInfo = *(BYTE **)pvStructInfo;
2976 ret = SystemTimeToFileTime(&sysTime,
2977 (FILETIME *)pvStructInfo);
2978 }
2979 }
2980 }
2981 }
2982 else
2983 {
2984 SetLastError(CRYPT_E_ASN1_BADTAG);
2985 ret = FALSE;
2986 }
2987 }
2988 __EXCEPT_PAGE_FAULT
2989 {
2990 SetLastError(STATUS_ACCESS_VIOLATION);
2991 ret = FALSE;
2992 }
2993 __ENDTRY
2994 return ret;
2995 }
2996
2997 static BOOL WINAPI CRYPT_AsnDecodeGeneralizedTime(DWORD dwCertEncodingType,
2998 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2999 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3000 {
3001 BOOL ret;
3002
3003 if (!pvStructInfo)
3004 {
3005 *pcbStructInfo = sizeof(FILETIME);
3006 return TRUE;
3007 }
3008 __TRY
3009 {
3010 ret = TRUE;
3011 if (pbEncoded[0] == ASN_GENERALTIME)
3012 {
3013 if (cbEncoded <= 1)
3014 {
3015 SetLastError(CRYPT_E_ASN1_EOD);
3016 ret = FALSE;
3017 }
3018 else if (pbEncoded[1] > 0x7f)
3019 {
3020 /* long-form date strings really can't be valid */
3021 SetLastError(CRYPT_E_ASN1_CORRUPT);
3022 ret = FALSE;
3023 }
3024 else
3025 {
3026 BYTE len = pbEncoded[1];
3027
3028 if (len < MIN_ENCODED_TIME_LENGTH)
3029 {
3030 SetLastError(CRYPT_E_ASN1_CORRUPT);
3031 ret = FALSE;
3032 }
3033 else
3034 {
3035 SYSTEMTIME sysTime = { 0 };
3036
3037 pbEncoded += 2;
3038 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 4, sysTime.wYear);
3039 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
3040 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
3041 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
3042 if (ret && len > 0)
3043 {
3044 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
3045 sysTime.wMinute);
3046 if (ret && len > 0)
3047 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
3048 sysTime.wSecond);
3049 if (ret && len > 0 && (*pbEncoded == '.' ||
3050 *pbEncoded == ','))
3051 {
3052 BYTE digits;
3053
3054 pbEncoded++;
3055 len--;
3056 /* workaround macro weirdness */
3057 digits = min(len, 3);
3058 CRYPT_TIME_GET_DIGITS(pbEncoded, len, digits,
3059 sysTime.wMilliseconds);
3060 }
3061 if (ret)
3062 ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
3063 &sysTime);
3064 }
3065 if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags,
3066 pDecodePara, pvStructInfo, pcbStructInfo,
3067 sizeof(FILETIME))))
3068 {
3069 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3070 pvStructInfo = *(BYTE **)pvStructInfo;
3071 ret = SystemTimeToFileTime(&sysTime,
3072 (FILETIME *)pvStructInfo);
3073 }
3074 }
3075 }
3076 }
3077 else
3078 {
3079 SetLastError(CRYPT_E_ASN1_BADTAG);
3080 ret = FALSE;
3081 }
3082 }
3083 __EXCEPT_PAGE_FAULT
3084 {
3085 SetLastError(STATUS_ACCESS_VIOLATION);
3086 ret = FALSE;
3087 }
3088 __ENDTRY
3089 return ret;
3090 }
3091
3092 static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
3093 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3094 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3095 {
3096 BOOL ret;
3097
3098 __TRY
3099 {
3100 if (pbEncoded[0] == ASN_UTCTIME)
3101 ret = CRYPT_AsnDecodeUtcTime(dwCertEncodingType, lpszStructType,
3102 pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
3103 pcbStructInfo);
3104 else if (pbEncoded[0] == ASN_GENERALTIME)
3105 ret = CRYPT_AsnDecodeGeneralizedTime(dwCertEncodingType,
3106 lpszStructType, pbEncoded, cbEncoded, dwFlags, pDecodePara,
3107 pvStructInfo, pcbStructInfo);
3108 else
3109 {
3110 SetLastError(CRYPT_E_ASN1_BADTAG);
3111 ret = FALSE;
3112 }
3113 }
3114 __EXCEPT_PAGE_FAULT
3115 {
3116 SetLastError(STATUS_ACCESS_VIOLATION);
3117 ret = FALSE;
3118 }
3119 __ENDTRY
3120 return ret;
3121 }
3122
3123 static BOOL WINAPI CRYPT_AsnDecodeSequenceOfAny(DWORD dwCertEncodingType,
3124 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3125 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3126 {
3127 BOOL ret = TRUE;
3128
3129 __TRY
3130 {
3131 if (pbEncoded[0] == ASN_SEQUENCEOF)
3132 {
3133 DWORD bytesNeeded, dataLen, remainingLen, cValue;
3134
3135 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
3136 {
3137 BYTE lenBytes;
3138 const BYTE *ptr;
3139
3140 lenBytes = GET_LEN_BYTES(pbEncoded[1]);
3141 bytesNeeded = sizeof(CRYPT_SEQUENCE_OF_ANY);
3142 cValue = 0;
3143 ptr = pbEncoded + 1 + lenBytes;
3144 remainingLen = dataLen;
3145 while (ret && remainingLen)
3146 {
3147 DWORD nextLen;
3148
3149 ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
3150 if (ret)
3151 {
3152 DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
3153
3154 remainingLen -= 1 + nextLenBytes + nextLen;
3155 ptr += 1 + nextLenBytes + nextLen;
3156 bytesNeeded += sizeof(CRYPT_DER_BLOB);
3157 if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
3158 bytesNeeded += 1 + nextLenBytes + nextLen;
3159 cValue++;
3160 }
3161 }
3162 if (ret)
3163 {
3164 CRYPT_SEQUENCE_OF_ANY *seq;
3165 BYTE *nextPtr;
3166 DWORD i;
3167
3168 if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
3169 pvStructInfo, pcbStructInfo, bytesNeeded)))
3170 {
3171 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
3172 pvStructInfo = *(BYTE **)pvStructInfo;
3173 seq = (CRYPT_SEQUENCE_OF_ANY *)pvStructInfo;
3174 seq->cValue = cValue;
3175 seq->rgValue = (CRYPT_DER_BLOB *)((BYTE *)seq +
3176 sizeof(*seq));
3177 nextPtr = (BYTE *)seq->rgValue +
3178 cValue * sizeof(CRYPT_DER_BLOB);
3179 ptr = pbEncoded + 1 + lenBytes;
3180 remainingLen = dataLen;
3181 i = 0;
3182 while (ret && remainingLen)
3183 {
3184 DWORD nextLen;
3185
3186 ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
3187 if (ret)
3188 {
3189 DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
3190
3191 seq->rgValue[i].cbData = 1 + nextLenBytes +
3192 nextLen;
3193 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
3194 seq->rgValue[i].pbData = (BYTE *)ptr;
3195 else
3196 {
3197 seq->rgValue[i].pbData = nextPtr;
3198 memcpy(nextPtr, ptr, 1 + nextLenBytes +
3199 nextLen);
3200 nextPtr += 1 + nextLenBytes + nextLen;
3201 }
3202 remainingLen -= 1 + nextLenBytes + nextLen;
3203 ptr += 1 + nextLenBytes + nextLen;
3204 i++;
3205 }
3206 }
3207 }
3208 }
3209 }
3210 }
3211 else
3212 {
3213 SetLastError(CRYPT_E_ASN1_BADTAG);
3214 ret = FALSE;
3215 }
3216 }
3217 __EXCEPT_PAGE_FAULT
3218 {
3219 SetLastError(STATUS_ACCESS_VIOLATION);
3220 ret = FALSE;
3221 }
3222 __ENDTRY
3223 return ret;
3224 }
3225
3226 static BOOL WINAPI CRYPT_AsnDecodeDistPointName(DWORD dwCertEncodingType,
3227 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3228 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3229 {
3230 BOOL ret;
3231
3232 if (pbEncoded[0] == (ASN_CONTEXT | ASN_CONSTRUCTOR | 0))
3233 {
3234 DWORD bytesNeeded, dataLen;
3235
3236 if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
3237 {
3238 struct AsnArrayDescriptor arrayDesc = {
3239 ASN_CONTEXT | ASN_CONSTRUCTOR | 0, CRYPT_AsnDecodeAltNameEntry,
3240 sizeof(CERT_ALT_NAME_ENTRY), TRUE,
3241 offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
3242 BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
3243
3244 if (dataLen)
3245 {
3246 DWORD nameLen;
3247
3248 ret = CRYPT_AsnDecodeArray(&arrayDesc,
3249 pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
3250 0, NULL, NULL, &nameLen, NULL);
3251 bytesNeeded = sizeof(CRL_DIST_POINT_NAME) + nameLen;
3252 }
3253 else
3254 bytesNeeded = sizeof(CRL_DIST_POINT_NAME);
3255 if (!pvStructInfo)
3256 *pcbStructInfo = bytesNeeded;
3257 else if (*pcbStructInfo < bytesNeeded)
3258 {
3259 *pcbStructInfo = bytesNeeded;
3260 SetLastError(ERROR_MORE_DATA);
3261 ret = FALSE;
3262 }
3263 else
3264 {
3265 CRL_DIST_POINT_NAME *name = (CRL_DIST_POINT_NAME *)pvStructInfo;
3266
3267 if (dataLen)
3268 {
3269 name->dwDistPointNameChoice = CRL_DIST_POINT_FULL_NAME;
3270 ret = CRYPT_AsnDecodeArray(&arrayDesc,
3271 pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
3272 0, NULL, &name->u.FullName, pcbStructInfo,
3273 name->u.FullName.rgAltEntry);
3274 }
3275 else
3276 name->dwDistPointNameChoice = CRL_DIST_POINT_NO_NAME;
3277 }
3278 }
3279 }
3280 else
3281 {
3282 SetLastError(CRYPT_E_ASN1_BADTAG);
3283 ret = FALSE;
3284 }
3285 return ret;
3286 }
3287
3288 static BOOL WINAPI CRYPT_AsnDecodeDistPoint(DWORD dwCertEncodingType,
3289 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3290 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3291 {
3292 struct AsnDecodeSequenceItem items[] = {
3293 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_DIST_POINT,
3294 DistPointName), CRYPT_AsnDecodeDistPointName,
3295 sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE, offsetof(CRL_DIST_POINT,
3296 DistPointName.u.FullName.rgAltEntry), 0 },
3297 { ASN_CONTEXT | 1, offsetof(CRL_DIST_POINT, ReasonFlags),
3298 CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
3299 offsetof(CRL_DIST_POINT, ReasonFlags.pbData), 0 },
3300 { ASN_CONTEXT | ASN_CONSTRUCTOR | 2, offsetof(CRL_DIST_POINT, CRLIssuer),
3301 CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE, TRUE,
3302 offsetof(CRL_DIST_POINT, CRLIssuer.rgAltEntry), 0 },
3303 };
3304 BOOL ret;
3305
3306 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
3307 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded,
3308 dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
3309 return ret;
3310 }
3311
3312 static BOOL WINAPI CRYPT_AsnDecodeCRLDistPoints(DWORD dwCertEncodingType,
3313 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3314 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3315 {
3316 BOOL ret;
3317
3318 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
3319 pDecodePara, pvStructInfo, *pcbStructInfo);
3320
3321 __TRY
3322 {
3323 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
3324 CRYPT_AsnDecodeDistPoint, sizeof(CRL_DIST_POINT), TRUE,
3325 offsetof(CRL_DIST_POINT, DistPointName.u.FullName.rgAltEntry) };
3326
3327 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
3328 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
3329 }
3330 __EXCEPT_PAGE_FAULT
3331 {
3332 SetLastError(STATUS_ACCESS_VIOLATION);
3333 ret = FALSE;
3334 }
3335 __ENDTRY
3336 return ret;
3337 }
3338
3339 static BOOL WINAPI CRYPT_AsnDecodeEnhancedKeyUsage(DWORD dwCertEncodingType,
3340 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3341 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3342 {
3343 BOOL ret;
3344
3345 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
3346 pDecodePara, pvStructInfo, *pcbStructInfo);
3347
3348 __TRY
3349 {
3350 struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
3351 CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
3352
3353 ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
3354 pDecodePara, pvStructInfo, pcbStructInfo, NULL);
3355 }
3356 __EXCEPT_PAGE_FAULT
3357 {
3358 SetLastError(STATUS_ACCESS_VIOLATION);
3359 ret = FALSE;
3360 }
3361 __ENDTRY
3362 return ret;
3363 }
3364
3365 static BOOL WINAPI CRYPT_AsnDecodeIssuingDistPoint(DWORD dwCertEncodingType,
3366 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3367 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3368 {
3369 BOOL ret;
3370
3371 TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
3372 pDecodePara, pvStructInfo, *pcbStructInfo);
3373
3374 __TRY
3375 {
3376 struct AsnDecodeSequenceItem items[] = {
3377 { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_ISSUING_DIST_POINT,
3378 DistPointName), CRYPT_AsnDecodeDistPointName,
3379 sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE,
3380 offsetof(CRL_ISSUING_DIST_POINT,
3381 DistPointName.u.FullName.rgAltEntry), 0 },
3382 { ASN_CONTEXT | 1, offsetof(CRL_ISSUING_DIST_POINT,
3383 fOnlyContainsUserCerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
3384 FALSE, 0 },
3385 { ASN_CONTEXT | 2, offsetof(CRL_ISSUING_DIST_POINT,
3386 fOnlyContainsCACerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
3387 FALSE, 0 },
3388 { ASN_CONTEXT | 3, offsetof(CRL_ISSUING_DIST_POINT,
3389 OnlySomeReasonFlags), CRYPT_AsnDecodeBitsInternal,
3390 sizeof(CRYPT_BIT_BLOB), TRUE, TRUE, offsetof(CRL_ISSUING_DIST_POINT,
3391 OnlySomeReasonFlags.pbData), 0 },
3392 { ASN_CONTEXT | 4, offsetof(CRL_ISSUING_DIST_POINT,
3393 fIndirectCRL), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0 },
3394 };
3395
3396 ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
3397 sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded,
3398 dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
3399 }
3400 __EXCEPT_PAGE_FAULT
3401 {
3402 SetLastError(STATUS_ACCESS_VIOLATION);
3403 ret = FALSE;
3404 }
3405 __ENDTRY
3406 return ret;
3407 }
3408
3409 BOOL WINAPI CryptDecodeObjectEx(DWORD dwCertEncodingType, LPCSTR lpszStructType,
3410 const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
3411 PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
3412 {
3413 static HCRYPTOIDFUNCSET set = NULL;
3414 BOOL ret = FALSE;
3415 CryptDecodeObjectExFunc decodeFunc = NULL;
3416 HCRYPTOIDFUNCADDR hFunc = NULL;
3417
3418 TRACE("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p, %p)\n",
3419 dwCertEncodingType, debugstr_a(lpszStructType), pbEncoded,
3420 cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
3421
3422 if (!pvStructInfo && !pcbStructInfo)
3423 {
3424 SetLastError(ERROR_INVALID_PARAMETER);
3425 return FALSE;
3426 }
3427 if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
3428 && (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
3429 {
3430 SetLastError(ERROR_FILE_NOT_FOUND);
3431 return FALSE;
3432 }
3433 if (!cbEncoded)
3434 {
3435 SetLastError(CRYPT_E_ASN1_EOD);
3436 return FALSE;
3437 }
3438 if (cbEncoded > MAX_ENCODED_LEN)
3439 {
3440 SetLastError(CRYPT_E_ASN1_LARGE);
3441 return FALSE;
3442 }
3443
3444 SetLastError(NOERROR);
3445 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG && pvStructInfo)
3446 *(BYTE **)pvStructInfo = NULL;
3447 if (!HIWORD(lpszStructType))
3448 {
3449 switch (LOWORD(lpszStructType))
3450 {
3451 case (WORD)X509_CERT:
3452 decodeFunc = CRYPT_AsnDecodeCertSignedContent;
3453 break;
3454 case (WORD)X509_CERT_TO_BE_SIGNED:
3455 decodeFunc = CRYPT_AsnDecodeCert;
3456 break;
3457 case (WORD)X509_CERT_CRL_TO_BE_SIGNED:
3458 decodeFunc = CRYPT_AsnDecodeCRL;
3459 break;
3460 case (WORD)X509_EXTENSIONS:
3461 decodeFunc = CRYPT_AsnDecodeExtensions;
3462 break;
3463 case (WORD)X509_NAME_VALUE:
3464 decodeFunc = CRYPT_AsnDecodeNameValue;
3465 break;
3466 case (WORD)X509_NAME:
3467 decodeFunc = CRYPT_AsnDecodeName;
3468 break;
3469 case (WORD)X509_PUBLIC_KEY_INFO:
3470 decodeFunc = CRYPT_AsnDecodePubKeyInfo;
3471 break;
3472 case (WORD)X509_ALTERNATE_NAME:
3473 decodeFunc = CRYPT_AsnDecodeAltName;
3474 break;
3475 case (WORD)X509_BASIC_CONSTRAINTS:
3476 decodeFunc = CRYPT_AsnDecodeBasicConstraints;
3477 break;
3478 case (WORD)X509_BASIC_CONSTRAINTS2:
3479 decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
3480 break;
3481 case (WORD)RSA_CSP_PUBLICKEYBLOB:
3482 decodeFunc = CRYPT_AsnDecodeRsaPubKey;
3483 break;
3484 case (WORD)X509_UNICODE_NAME:
3485 decodeFunc = CRYPT_AsnDecodeUnicodeName;
3486 break;
3487 case (WORD)X509_UNICODE_NAME_VALUE:
3488 decodeFunc = CRYPT_AsnDecodeUnicodeNameValue;
3489 break;
3490 case (WORD)X509_OCTET_STRING:
3491 decodeFunc = CRYPT_AsnDecodeOctets;
3492 break;
3493 case (WORD)X509_BITS:
3494 case (WORD)X509_KEY_USAGE:
3495 decodeFunc = CRYPT_AsnDecodeBits;
3496 break;
3497 case (WORD)X509_INTEGER:
3498 decodeFunc = CRYPT_AsnDecodeInt;
3499 break;
3500 case (WORD)X509_MULTI_BYTE_INTEGER:
3501 decodeFunc = CRYPT_AsnDecodeInteger;
3502 break;
3503 case (WORD)X509_MULTI_BYTE_UINT:
3504 decodeFunc = CRYPT_AsnDecodeUnsignedInteger;
3505 break;
3506 case (WORD)X509_ENUMERATED:
3507 decodeFunc = CRYPT_AsnDecodeEnumerated;
3508 break;
3509 case (WORD)X509_CHOICE_OF_TIME:
3510 decodeFunc = CRYPT_AsnDecodeChoiceOfTime;
3511 break;
3512 case (WORD)X509_SEQUENCE_OF_ANY:
3513 decodeFunc = CRYPT_AsnDecodeSequenceOfAny;
3514 break;
3515 case (WORD)PKCS_UTC_TIME:
3516 decodeFunc = CRYPT_AsnDecodeUtcTime;
3517 break;
3518 case (WORD)X509_CRL_DIST_POINTS:
3519 decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
3520 break;
3521 case (WORD)X509_ENHANCED_KEY_USAGE:
3522 decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
3523 break;
3524 case (WORD)X509_ISSUING_DIST_POINT:
3525 decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
3526 break;
3527 default:
3528 FIXME("%d: unimplemented\n", LOWORD(lpszStructType));
3529 }
3530 }
3531 else if (!strcmp(lpszStructType, szOID_CERT_EXTENSIONS))
3532 decodeFunc = CRYPT_AsnDecodeExtensions;
3533 else if (!strcmp(lpszStructType, szOID_RSA_signingTime))
3534 decodeFunc = CRYPT_AsnDecodeUtcTime;
3535 else if (!strcmp(lpszStructType, szOID_CRL_REASON_CODE))
3536 decodeFunc = CRYPT_AsnDecodeEnumerated;
3537 else if (!strcmp(lpszStructType, szOID_KEY_USAGE))
3538 decodeFunc = CRYPT_AsnDecodeBits;
3539 else if (!strcmp(lpszStructType, szOID_SUBJECT_KEY_IDENTIFIER))
3540 decodeFunc = CRYPT_AsnDecodeOctets;
3541 else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS))
3542 decodeFunc = CRYPT_AsnDecodeBasicConstraints;
3543 else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS2))
3544 decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
3545 else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME))
3546 decodeFunc = CRYPT_AsnDecodeAltName;
3547 else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME2))
3548 decodeFunc = CRYPT_AsnDecodeAltName;
3549 else if (!strcmp(lpszStructType, szOID_NEXT_UPDATE_LOCATION))
3550 decodeFunc = CRYPT_AsnDecodeAltName;
3551 else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME))
3552 decodeFunc = CRYPT_AsnDecodeAltName;
3553 else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME2))
3554 decodeFunc = CRYPT_AsnDecodeAltName;
3555 else if (!strcmp(lpszStructType, szOID_CRL_DIST_POINTS))
3556 decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
3557 else if (!strcmp(lpszStructType, szOID_ENHANCED_KEY_USAGE))
3558 decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
3559 else if (!strcmp(lpszStructType, szOID_ISSUING_DIST_POINT))
3560 decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
3561 else
3562 TRACE("OID %s not found or unimplemented, looking for DLL\n",
3563 debugstr_a(lpszStructType));
3564 if (!decodeFunc)
3565 {
3566 if (!set)
3567 set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_EX_FUNC, 0);
3568 CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
3569 (void **)&decodeFunc, &hFunc);
3570 }
3571 if (decodeFunc)
3572 ret = decodeFunc(dwCertEncodingType, lpszStructType, pbEncoded,
3573 cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
3574 else
3575 SetLastError(ERROR_FILE_NOT_FOUND);
3576 if (hFunc)
3577 CryptFreeOIDFunctionAddress(hFunc, 0);
3578 return ret;
3579 }
Windows API implementation