git.oblomov.eu Git - wine/blob - dlls/crypt32/decode.c

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 "winreg.h"
  46 #include "snmp.h"
  47 #include "wine/debug.h"
  48 #include "wine/exception.h"
  49 #include "crypt32_private.h"
  50
  51 /* This is a bit arbitrary, but to set some limit: */
  52 #define MAX_ENCODED_LEN 0x02000000
  53
  54 #define ASN_FLAGS_MASK 0xe0
  55 #define ASN_TYPE_MASK  0x1f
  56
  57 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
  58
  59 struct GenericArray
  60 {
  61     DWORD cItems;
  62     BYTE *rgItems;
  63 };
  64
  65 typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
  66  DWORD, DWORD, void *, DWORD *);
  67 typedef BOOL (WINAPI *CryptDecodeObjectExFunc)(DWORD, LPCSTR, const BYTE *,
  68  DWORD, DWORD, PCRYPT_DECODE_PARA, void *, DWORD *);
  69
  70 /* Prototypes for built-in decoders.  They follow the Ex style prototypes.
  71  * The dwCertEncodingType and lpszStructType are ignored by the built-in
  72  * functions, but the parameters are retained to simplify CryptDecodeObjectEx,
  73  * since it must call functions in external DLLs that follow these signatures.
  74  */
  75 static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
  76  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
  77  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
  78 static BOOL WINAPI CRYPT_AsnDecodePubKeyInfoInternal(DWORD dwCertEncodingType,
  79  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
  80  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
  81 /* Like CRYPT_AsnDecodeExtensions, except assumes rgExtension is set ahead of
  82  * time, doesn't do memory allocation, and doesn't do exception handling.
  83  * (This isn't intended to be the externally-called one.)
  84  */
  85 static BOOL WINAPI CRYPT_AsnDecodeExtensionsInternal(DWORD dwCertEncodingType,
  86  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
  87  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
  88 /* Assumes algo->Parameters.pbData is set ahead of time.  Internal func. */
  89 static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
  90  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
  91  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
  92 /* Internal function */
  93 static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
  94  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
  95  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
  96 /* Assumes the CRYPT_DATA_BLOB's pbData member has been initialized */
  97 static BOOL WINAPI CRYPT_AsnDecodeOctetsInternal(DWORD dwCertEncodingType,
  98  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
  99  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
 100 /* Like CRYPT_AsnDecodeBits, but assumes the CRYPT_INTEGER_BLOB's pbData
 101  * member has been initialized, doesn't do exception handling, and doesn't do
 102  * memory allocation.
 103  */
 104 static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
 105  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 106  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
 107 static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
 108  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 109  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
 110 static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
 111  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 112  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
 113 /* Like CRYPT_AsnDecodeInteger, but assumes the CRYPT_INTEGER_BLOB's pbData
 114  * member has been initialized, doesn't do exception handling, and doesn't do
 115  * memory allocation.
 116  */
 117 static BOOL WINAPI CRYPT_AsnDecodeIntegerInternal(DWORD dwCertEncodingType,
 118  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 119  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
 120 /* Like CRYPT_AsnDecodeInteger, but unsigned.  */
 121 static BOOL WINAPI CRYPT_AsnDecodeUnsignedIntegerInternal(
 122  DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
 123  DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
 124  void *pvStructInfo, DWORD *pcbStructInfo);
 125
 126 BOOL WINAPI CryptDecodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
 127  const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
 128  DWORD *pcbStructInfo)
 129 {
 130     static HCRYPTOIDFUNCSET set = NULL;
 131     BOOL ret = FALSE;
 132     CryptDecodeObjectFunc pCryptDecodeObject;
 133     HCRYPTOIDFUNCADDR hFunc;
 134
 135     TRACE("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p)\n", dwCertEncodingType,
 136      debugstr_a(lpszStructType), pbEncoded, cbEncoded, dwFlags,
 137      pvStructInfo, pcbStructInfo);
 138
 139     if (!pvStructInfo && !pcbStructInfo)
 140     {
 141         SetLastError(ERROR_INVALID_PARAMETER);
 142         return FALSE;
 143     }
 144
 145     /* Try registered DLL first.. */
 146     if (!set)
 147         set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_FUNC, 0);
 148     CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
 149      (void **)&pCryptDecodeObject, &hFunc);
 150     if (pCryptDecodeObject)
 151     {
 152         ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
 153          pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
 154         CryptFreeOIDFunctionAddress(hFunc, 0);
 155     }
 156     else
 157     {
 158         /* If not, use CryptDecodeObjectEx */
 159         ret = CryptDecodeObjectEx(dwCertEncodingType, lpszStructType, pbEncoded,
 160          cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo);
 161     }
 162     return ret;
 163 }
 164
 165 /* Gets the number of length bytes from the given (leading) length byte */
 166 #define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))
 167
 168 /* Helper function to get the encoded length of the data starting at pbEncoded,
 169  * where pbEncoded[0] is the tag.  If the data are too short to contain a
 170  * length or if the length is too large for cbEncoded, sets an appropriate
 171  * error code and returns FALSE.
 172  */
 173 static BOOL WINAPI CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded,
 174  DWORD *len)
 175 {
 176     BOOL ret;
 177
 178     if (cbEncoded <= 1)
 179     {
 180         SetLastError(CRYPT_E_ASN1_CORRUPT);
 181         ret = FALSE;
 182     }
 183     else if (pbEncoded[1] <= 0x7f)
 184     {
 185         if (pbEncoded[1] + 1 > cbEncoded)
 186         {
 187             SetLastError(CRYPT_E_ASN1_EOD);
 188             ret = FALSE;
 189         }
 190         else
 191         {
 192             *len = pbEncoded[1];
 193             ret = TRUE;
 194         }
 195     }
 196     else
 197     {
 198         BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
 199
 200         if (lenLen > sizeof(DWORD) + 1)
 201         {
 202             SetLastError(CRYPT_E_ASN1_LARGE);
 203             ret = FALSE;
 204         }
 205         else if (lenLen + 2 > cbEncoded)
 206         {
 207             SetLastError(CRYPT_E_ASN1_CORRUPT);
 208             ret = FALSE;
 209         }
 210         else
 211         {
 212             DWORD out = 0;
 213
 214             pbEncoded += 2;
 215             while (--lenLen)
 216             {
 217                 out <<= 8;
 218                 out |= *pbEncoded++;
 219             }
 220             if (out + lenLen + 1 > cbEncoded)
 221             {
 222                 SetLastError(CRYPT_E_ASN1_EOD);
 223                 ret = FALSE;
 224             }
 225             else
 226             {
 227                 *len = out;
 228                 ret = TRUE;
 229             }
 230         }
 231     }
 232     return ret;
 233 }
 234
 235 /* Helper function to check *pcbStructInfo, set it to the required size, and
 236  * optionally to allocate memory.  Assumes pvStructInfo is not NULL.
 237  * If CRYPT_DECODE_ALLOC_FLAG is set in dwFlags, *pvStructInfo will be set to a
 238  * pointer to the newly allocated memory.
 239  */
 240 static BOOL CRYPT_DecodeEnsureSpace(DWORD dwFlags,
 241  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
 242  DWORD bytesNeeded)
 243 {
 244     BOOL ret = TRUE;
 245
 246     if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
 247     {
 248         if (pDecodePara && pDecodePara->pfnAlloc)
 249             *(BYTE **)pvStructInfo = pDecodePara->pfnAlloc(bytesNeeded);
 250         else
 251             *(BYTE **)pvStructInfo = LocalAlloc(0, bytesNeeded);
 252         if (!*(BYTE **)pvStructInfo)
 253             ret = FALSE;
 254         else
 255             *pcbStructInfo = bytesNeeded;
 256     }
 257     else if (*pcbStructInfo < bytesNeeded)
 258     {
 259         *pcbStructInfo = bytesNeeded;
 260         SetLastError(ERROR_MORE_DATA);
 261         ret = FALSE;
 262     }
 263     return ret;
 264 }
 265
 266 /* tag:
 267  *     The expected tag of the item.  If tag is 0, decodeFunc is called
 268  *     regardless of the tag value seen.
 269  * offset:
 270  *     A sequence is decoded into a struct.  The offset member is the
 271  *     offset of this item within that struct.
 272  * decodeFunc:
 273  *     The decoder function to use.  If this is NULL, then the member isn't
 274  *     decoded, but minSize space is reserved for it.
 275  * minSize:
 276  *     The minimum amount of space occupied after decoding.  You must set this.
 277  * optional:
 278  *     If true, and the tag doesn't match the expected tag for this item,
 279  *     or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
 280  *     filled with 0 for this member.
 281  * hasPointer, pointerOffset, minSize:
 282  *     If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
 283  *     the offset within the (outer) struct of the data pointer (or to the
 284  *     first data pointer, if more than one exist).
 285  * size:
 286  *     Used by CRYPT_AsnDecodeSequence, not for your use.
 287  */
 288 struct AsnDecodeSequenceItem
 289 {
 290     BYTE                    tag;
 291     DWORD                   offset;
 292     CryptDecodeObjectExFunc decodeFunc;
 293     DWORD                   minSize;
 294     BOOL                    optional;
 295     BOOL                    hasPointer;
 296     DWORD                   pointerOffset;
 297     DWORD                   size;
 298 };
 299
 300 static BOOL CRYPT_AsnDecodeSequenceItems(DWORD dwCertEncodingType,
 301  struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
 302  DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, BYTE *nextData)
 303 {
 304     BOOL ret;
 305     DWORD i;
 306     const BYTE *ptr;
 307
 308     ptr = pbEncoded + 1 + GET_LEN_BYTES(pbEncoded[1]);
 309     for (i = 0, ret = TRUE; ret && i < cItem; i++)
 310     {
 311         if (cbEncoded - (ptr - pbEncoded) != 0)
 312         {
 313             DWORD nextItemLen;
 314
 315             if ((ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
 316              &nextItemLen)))
 317             {
 318                 BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);
 319
 320                 if (ptr[0] == items[i].tag || !items[i].tag)
 321                 {
 322                     if (nextData && pvStructInfo && items[i].hasPointer)
 323                     {
 324                         TRACE("Setting next pointer to %p\n",
 325                          nextData);
 326                         *(BYTE **)((BYTE *)pvStructInfo +
 327                          items[i].pointerOffset) = nextData;
 328                     }
 329                     if (items[i].decodeFunc)
 330                     {
 331                         if (pvStructInfo)
 332                             TRACE("decoding item %ld\n", i);
 333                         else
 334                             TRACE("sizing item %ld\n", i);
 335                         ret = items[i].decodeFunc(dwCertEncodingType,
 336                          NULL, ptr, 1 + nextItemLenBytes + nextItemLen,
 337                          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
 338                          pvStructInfo ?  (BYTE *)pvStructInfo + items[i].offset
 339                          : NULL, &items[i].size);
 340                         if (ret)
 341                         {
 342                             if (nextData && items[i].hasPointer &&
 343                              items[i].size > items[i].minSize)
 344                             {
 345                                 nextData += items[i].size - items[i].minSize;
 346                                 /* align nextData to DWORD boundaries */
 347                                 if (items[i].size % sizeof(DWORD))
 348                                     nextData += sizeof(DWORD) - items[i].size %
 349                                      sizeof(DWORD);
 350                             }
 351                             /* Account for alignment padding */
 352                             if (items[i].size % sizeof(DWORD))
 353                                 items[i].size += sizeof(DWORD) -
 354                                  items[i].size % sizeof(DWORD);
 355                             ptr += 1 + nextItemLenBytes + nextItemLen;
 356                         }
 357                         else if (items[i].optional &&
 358                          GetLastError() == CRYPT_E_ASN1_BADTAG)
 359                         {
 360                             TRACE("skipping optional item %ld\n", i);
 361                             items[i].size = items[i].minSize;
 362                             SetLastError(NOERROR);
 363                             ret = TRUE;
 364                         }
 365                         else
 366                             TRACE("item %ld failed: %08lx\n", i,
 367                              GetLastError());
 368                     }
 369                     else
 370                         items[i].size = items[i].minSize;
 371                 }
 372                 else if (items[i].optional)
 373                 {
 374                     TRACE("skipping optional item %ld\n", i);
 375                     items[i].size = items[i].minSize;
 376                 }
 377                 else
 378                 {
 379                     TRACE("tag %02x doesn't match expected %02x\n",
 380                      ptr[0], items[i].tag);
 381                     SetLastError(CRYPT_E_ASN1_BADTAG);
 382                     ret = FALSE;
 383                 }
 384             }
 385         }
 386         else if (items[i].optional)
 387         {
 388             TRACE("missing optional item %ld, skipping\n", i);
 389             items[i].size = items[i].minSize;
 390         }
 391         else
 392         {
 393             TRACE("not enough bytes for item %ld, failing\n", i);
 394             SetLastError(CRYPT_E_ASN1_CORRUPT);
 395             ret = FALSE;
 396         }
 397     }
 398     if (cbEncoded - (ptr - pbEncoded) != 0)
 399     {
 400         TRACE("%ld remaining bytes, failing\n", cbEncoded -
 401          (ptr - pbEncoded));
 402         SetLastError(CRYPT_E_ASN1_CORRUPT);
 403         ret = FALSE;
 404     }
 405     return ret;
 406 }
 407
 408 /* This decodes an arbitrary sequence into a contiguous block of memory
 409  * (basically, a struct.)  Each element being decoded is described by a struct
 410  * AsnDecodeSequenceItem, see above.
 411  * startingPointer is an optional pointer to the first place where dynamic
 412  * data will be stored.  If you know the starting offset, you may pass it
 413  * here.  Otherwise, pass NULL, and one will be inferred from the items.
 414  * Each item decoder is never called with CRYPT_DECODE_ALLOC_FLAG set.
 415  * If any undecoded data are left over, fails with CRYPT_E_ASN1_CORRUPT.
 416  */
 417 static BOOL CRYPT_AsnDecodeSequence(DWORD dwCertEncodingType,
 418  struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
 419  DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
 420  void *pvStructInfo, DWORD *pcbStructInfo, void *startingPointer)
 421 {
 422     BOOL ret;
 423
 424     TRACE("%p, %ld, %p, %ld, %08lx, %p, %p, %ld, %p\n", items, cItem, pbEncoded,
 425      cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
 426      startingPointer);
 427
 428     if (pbEncoded[0] == ASN_SEQUENCE)
 429     {
 430         DWORD dataLen;
 431
 432         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
 433         {
 434             DWORD i;
 435
 436             ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem, pbEncoded,
 437              cbEncoded, dwFlags, NULL, NULL);
 438             if (ret)
 439             {
 440                 DWORD bytesNeeded = 0, structSize = 0;
 441
 442                 for (i = 0; i < cItem; i++)
 443                 {
 444                     bytesNeeded += items[i].size;
 445                     structSize += items[i].minSize;
 446                 }
 447                 if (!pvStructInfo)
 448                     *pcbStructInfo = bytesNeeded;
 449                 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
 450                  pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
 451                 {
 452                     BYTE *nextData;
 453
 454                     if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
 455                         pvStructInfo = *(BYTE **)pvStructInfo;
 456                     if (startingPointer)
 457                         nextData = (BYTE *)startingPointer;
 458                     else
 459                         nextData = (BYTE *)pvStructInfo + structSize;
 460                     memset(pvStructInfo, 0, structSize);
 461                     ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem,
 462                      pbEncoded, cbEncoded, dwFlags, pvStructInfo, nextData);
 463                 }
 464             }
 465         }
 466     }
 467     else
 468     {
 469         SetLastError(CRYPT_E_ASN1_BADTAG);
 470         ret = FALSE;
 471     }
 472     TRACE("returning %d (%08lx)\n", ret, GetLastError());
 473     return ret;
 474 }
 475
 476 /* tag:
 477  *     The expected tag of the entire encoded array (usually a variant
 478  *     of ASN_SETOF or ASN_SEQUENCEOF.)
 479  * decodeFunc:
 480  *     used to decode each item in the array
 481  * itemSize:
 482  *      is the minimum size of each decoded item
 483  * hasPointer:
 484  *      indicates whether each item has a dynamic pointer
 485  * pointerOffset:
 486  *     indicates the offset within itemSize at which the pointer exists
 487  */
 488 struct AsnArrayDescriptor
 489 {
 490     BYTE                    tag;
 491     CryptDecodeObjectExFunc decodeFunc;
 492     DWORD                   itemSize;
 493     BOOL                    hasPointer;
 494     DWORD                   pointerOffset;
 495 };
 496
 497 struct AsnArrayItemSize
 498 {
 499     DWORD encodedLen;
 500     DWORD size;
 501 };
 502
 503 /* Decodes an array of like types into a struct GenericArray.
 504  * The layout and decoding of the array are described by a struct
 505  * AsnArrayDescriptor.
 506  */
 507 static BOOL CRYPT_AsnDecodeArray(const struct AsnArrayDescriptor *arrayDesc,
 508  const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 509  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
 510  void *startingPointer)
 511 {
 512     BOOL ret = TRUE;
 513
 514     TRACE("%p, %p, %ld, %08lx, %p, %p, %ld, %p\n", arrayDesc, pbEncoded,
 515      cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
 516      startingPointer);
 517
 518     if (pbEncoded[0] == arrayDesc->tag)
 519     {
 520         DWORD dataLen;
 521
 522         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
 523         {
 524             DWORD bytesNeeded, cItems = 0;
 525             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
 526             /* There can be arbitrarily many items, but there is often only one.
 527              */
 528             struct AsnArrayItemSize itemSize = { 0 }, *itemSizes = &itemSize;
 529
 530             bytesNeeded = sizeof(struct GenericArray);
 531             if (dataLen)
 532             {
 533                 const BYTE *ptr;
 534
 535                 for (ptr = pbEncoded + 1 + lenBytes; ret &&
 536                  ptr - pbEncoded - 1 - lenBytes < dataLen; )
 537                 {
 538                     DWORD itemLenBytes, itemDataLen, size;
 539
 540                     itemLenBytes = GET_LEN_BYTES(ptr[1]);
 541                     /* Each item decoded may not tolerate extraneous bytes, so
 542                      * get the length of the next element and pass it directly.
 543                      */
 544                     ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
 545                      &itemDataLen);
 546                     if (ret)
 547                         ret = arrayDesc->decodeFunc(X509_ASN_ENCODING, 0, ptr,
 548                          1 + itemLenBytes + itemDataLen,
 549                          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL,
 550                          &size);
 551                     if (ret)
 552                     {
 553                         DWORD nextLen;
 554
 555                         cItems++;
 556                         if (itemSizes != &itemSize)
 557                             itemSizes = CryptMemRealloc(itemSizes,
 558                              cItems * sizeof(struct AsnArrayItemSize));
 559                         else
 560                         {
 561                             itemSizes =
 562                              CryptMemAlloc(
 563                              cItems * sizeof(struct AsnArrayItemSize));
 564                             memcpy(itemSizes, &itemSize, sizeof(itemSize));
 565                         }
 566                         if (itemSizes)
 567                         {
 568                             itemSizes[cItems - 1].encodedLen = 1 + itemLenBytes
 569                              + itemDataLen;
 570                             itemSizes[cItems - 1].size = size;
 571                             bytesNeeded += size;
 572                             ret = CRYPT_GetLen(ptr,
 573                              cbEncoded - (ptr - pbEncoded), &nextLen);
 574                             if (ret)
 575                                 ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
 576                         }
 577                         else
 578                             ret = FALSE;
 579                     }
 580                 }
 581             }
 582             if (ret)
 583             {
 584                 if (!pvStructInfo)
 585                     *pcbStructInfo = bytesNeeded;
 586                 else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
 587                  pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
 588                 {
 589                     DWORD i;
 590                     BYTE *nextData;
 591                     const BYTE *ptr;
 592                     struct GenericArray *array;
 593
 594                     if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
 595                         pvStructInfo = *(BYTE **)pvStructInfo;
 596                     array = (struct GenericArray *)pvStructInfo;
 597                     array->cItems = cItems;
 598                     if (startingPointer)
 599                         array->rgItems = startingPointer;
 600                     else
 601                         array->rgItems = (BYTE *)array +
 602                          sizeof(struct GenericArray);
 603                     nextData = (BYTE *)array->rgItems +
 604                      array->cItems * arrayDesc->itemSize;
 605                     for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
 606                      i < cItems && ptr - pbEncoded - 1 - lenBytes <
 607                      dataLen; i++)
 608                     {
 609                         if (arrayDesc->hasPointer)
 610                             *(BYTE **)(array->rgItems + i * arrayDesc->itemSize
 611                              + arrayDesc->pointerOffset) = nextData;
 612                         ret = arrayDesc->decodeFunc(X509_ASN_ENCODING, 0, ptr,
 613                          itemSizes[i].encodedLen,
 614                          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
 615                          array->rgItems + i * arrayDesc->itemSize,
 616                          &itemSizes[i].size);
 617                         if (ret)
 618                         {
 619                             DWORD nextLen;
 620
 621                             nextData += itemSizes[i].size - arrayDesc->itemSize;
 622                             ret = CRYPT_GetLen(ptr,
 623                              cbEncoded - (ptr - pbEncoded), &nextLen);
 624                             if (ret)
 625                                 ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
 626                         }
 627                     }
 628                 }
 629             }
 630             if (itemSizes != &itemSize)
 631                 CryptMemFree(itemSizes);
 632         }
 633     }
 634     else
 635     {
 636         SetLastError(CRYPT_E_ASN1_BADTAG);
 637         ret = FALSE;
 638     }
 639     return ret;
 640 }
 641
 642 /* Decodes a DER-encoded BLOB into a CRYPT_DER_BLOB struct pointed to by
 643  * pvStructInfo.  The BLOB must be non-empty, otherwise the last error is set
 644  * to CRYPT_E_ASN1_CORRUPT.
 645  * Warning: assumes the CRYPT_DER_BLOB pointed to by pvStructInfo has pbData
 646  * set!
 647  */
 648 static BOOL WINAPI CRYPT_AsnDecodeDerBlob(DWORD dwCertEncodingType,
 649  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 650  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 651 {
 652     BOOL ret;
 653     DWORD dataLen;
 654
 655     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
 656     {
 657         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
 658         DWORD bytesNeeded = sizeof(CRYPT_DER_BLOB);
 659
 660         if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
 661             bytesNeeded += 1 + lenBytes + dataLen;
 662
 663         if (!pvStructInfo)
 664             *pcbStructInfo = bytesNeeded;
 665         else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
 666          pvStructInfo, pcbStructInfo, bytesNeeded)))
 667         {
 668             CRYPT_DER_BLOB *blob;
 669
 670             if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
 671                 pvStructInfo = *(BYTE **)pvStructInfo;
 672             blob = (CRYPT_DER_BLOB *)pvStructInfo;
 673             blob->cbData = 1 + lenBytes + dataLen;
 674             if (blob->cbData)
 675             {
 676                 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
 677                     blob->pbData = (BYTE *)pbEncoded;
 678                 else
 679                 {
 680                     assert(blob->pbData);
 681                     memcpy(blob->pbData, pbEncoded, blob->cbData);
 682                 }
 683             }
 684             else
 685             {
 686                 SetLastError(CRYPT_E_ASN1_CORRUPT);
 687                 ret = FALSE;
 688             }
 689         }
 690     }
 691     return ret;
 692 }
 693
 694 /* Like CRYPT_AsnDecodeBitsInternal, but swaps the bytes */
 695 static BOOL WINAPI CRYPT_AsnDecodeBitsSwapBytes(DWORD dwCertEncodingType,
 696  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 697  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 698 {
 699     BOOL ret;
 700
 701     TRACE("(%p, %ld, 0x%08lx, %p, %p, %ld)\n", pbEncoded, cbEncoded, dwFlags,
 702      pDecodePara, pvStructInfo, *pcbStructInfo);
 703
 704     /* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
 705      * place.
 706      */
 707     ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType, lpszStructType,
 708      pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pDecodePara,
 709      pvStructInfo, pcbStructInfo);
 710     if (ret && pvStructInfo)
 711     {
 712         CRYPT_BIT_BLOB *blob = (CRYPT_BIT_BLOB *)pvStructInfo;
 713
 714         if (blob->cbData)
 715         {
 716             DWORD i;
 717             BYTE temp;
 718
 719             for (i = 0; i < blob->cbData / 2; i++)
 720             {
 721                 temp = blob->pbData[i];
 722                 blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
 723                 blob->pbData[blob->cbData - i - 1] = temp;
 724             }
 725         }
 726     }
 727     TRACE("returning %d (%08lx)\n", ret, GetLastError());
 728     return ret;
 729 }
 730
 731 static BOOL WINAPI CRYPT_AsnDecodeCert(DWORD dwCertEncodingType,
 732  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 733  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 734 {
 735     BOOL ret = TRUE;
 736
 737     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
 738      pDecodePara, pvStructInfo, *pcbStructInfo);
 739
 740     __TRY
 741     {
 742         struct AsnDecodeSequenceItem items[] = {
 743          { 0, offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned),
 744            CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
 745            offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned.pbData), 0 },
 746          { ASN_SEQUENCEOF, offsetof(CERT_SIGNED_CONTENT_INFO,
 747            SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
 748            sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
 749            offsetof(CERT_SIGNED_CONTENT_INFO, SignatureAlgorithm.pszObjId), 0 },
 750          { ASN_BITSTRING, offsetof(CERT_SIGNED_CONTENT_INFO, Signature),
 751            CRYPT_AsnDecodeBitsSwapBytes, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
 752            offsetof(CERT_SIGNED_CONTENT_INFO, Signature.pbData), 0 },
 753         };
 754
 755         if (dwFlags & CRYPT_DECODE_NO_SIGNATURE_BYTE_REVERSAL_FLAG)
 756             items[2].decodeFunc = CRYPT_AsnDecodeBitsInternal;
 757         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
 758          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
 759          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
 760     }
 761     __EXCEPT_PAGE_FAULT
 762     {
 763         SetLastError(STATUS_ACCESS_VIOLATION);
 764         ret = FALSE;
 765     }
 766     __ENDTRY
 767     return ret;
 768 }
 769
 770 /* Internal function */
 771 static BOOL WINAPI CRYPT_AsnDecodeCertVersion(DWORD dwCertEncodingType,
 772  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 773  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 774 {
 775     BOOL ret;
 776     DWORD dataLen;
 777
 778     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
 779     {
 780         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
 781
 782         ret = CRYPT_AsnDecodeInt(dwCertEncodingType, X509_INTEGER,
 783          pbEncoded + 1 + lenBytes, dataLen, dwFlags, pDecodePara,
 784          pvStructInfo, pcbStructInfo);
 785     }
 786     return ret;
 787 }
 788
 789 static BOOL WINAPI CRYPT_AsnDecodeValidity(DWORD dwCertEncodingType,
 790  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 791  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 792 {
 793     BOOL ret;
 794
 795     struct AsnDecodeSequenceItem items[] = {
 796      { 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotBefore),
 797        CRYPT_AsnDecodeChoiceOfTime, sizeof(FILETIME), FALSE, FALSE, 0 },
 798      { 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotAfter),
 799        CRYPT_AsnDecodeChoiceOfTime, sizeof(FILETIME), FALSE, FALSE, 0 },
 800     };
 801
 802     ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
 803      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
 804      pDecodePara, pvStructInfo, pcbStructInfo, NULL);
 805     return ret;
 806 }
 807
 808 /* Internal function */
 809 static BOOL WINAPI CRYPT_AsnDecodeCertExtensions(DWORD dwCertEncodingType,
 810  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 811  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 812 {
 813     BOOL ret;
 814     DWORD dataLen;
 815
 816     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
 817     {
 818         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
 819
 820         ret = CRYPT_AsnDecodeExtensionsInternal(dwCertEncodingType,
 821          X509_EXTENSIONS, pbEncoded + 1 + lenBytes, dataLen, dwFlags,
 822          pDecodePara, pvStructInfo, pcbStructInfo);
 823     }
 824     return ret;
 825 }
 826
 827 static BOOL WINAPI CRYPT_AsnDecodeCertInfo(DWORD dwCertEncodingType,
 828  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 829  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 830 {
 831     BOOL ret = TRUE;
 832
 833     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
 834      pDecodePara, pvStructInfo, *pcbStructInfo);
 835
 836     __TRY
 837     {
 838         struct AsnDecodeSequenceItem items[] = {
 839          { ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(CERT_INFO, dwVersion),
 840            CRYPT_AsnDecodeCertVersion, sizeof(DWORD), TRUE, FALSE, 0, 0 },
 841          { ASN_INTEGER, offsetof(CERT_INFO, SerialNumber),
 842            CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
 843            TRUE, offsetof(CERT_INFO, SerialNumber.pbData), 0 },
 844          { ASN_SEQUENCEOF, offsetof(CERT_INFO, SignatureAlgorithm),
 845            CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
 846            FALSE, TRUE, offsetof(CERT_INFO, SignatureAlgorithm.pszObjId), 0 },
 847          { 0, offsetof(CERT_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
 848            sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
 849            Issuer.pbData) },
 850          { ASN_SEQUENCEOF, offsetof(CERT_INFO, NotBefore),
 851            CRYPT_AsnDecodeValidity, sizeof(CERT_PRIVATE_KEY_VALIDITY), FALSE,
 852            FALSE, 0 },
 853          { 0, offsetof(CERT_INFO, Subject), CRYPT_AsnDecodeDerBlob,
 854            sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
 855            Subject.pbData) },
 856          { ASN_SEQUENCEOF, offsetof(CERT_INFO, SubjectPublicKeyInfo),
 857            CRYPT_AsnDecodePubKeyInfoInternal, sizeof(CERT_PUBLIC_KEY_INFO),
 858            FALSE, TRUE, offsetof(CERT_INFO,
 859            SubjectPublicKeyInfo.Algorithm.Parameters.pbData), 0 },
 860          { ASN_BITSTRING, offsetof(CERT_INFO, IssuerUniqueId),
 861            CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
 862            offsetof(CERT_INFO, IssuerUniqueId.pbData), 0 },
 863          { ASN_BITSTRING, offsetof(CERT_INFO, SubjectUniqueId),
 864            CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
 865            offsetof(CERT_INFO, SubjectUniqueId.pbData), 0 },
 866          { ASN_CONTEXT | ASN_CONSTRUCTOR | 3, offsetof(CERT_INFO, cExtension),
 867            CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
 868            offsetof(CERT_INFO, rgExtension), 0 },
 869         };
 870
 871         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
 872          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
 873          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
 874     }
 875     __EXCEPT_PAGE_FAULT
 876     {
 877         SetLastError(STATUS_ACCESS_VIOLATION);
 878         ret = FALSE;
 879     }
 880     __ENDTRY
 881     return ret;
 882 }
 883
 884 static BOOL WINAPI CRYPT_AsnDecodeCRLEntry(DWORD dwCertEncodingType,
 885  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 886  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 887 {
 888     BOOL ret;
 889     struct AsnDecodeSequenceItem items[] = {
 890      { ASN_INTEGER, offsetof(CRL_ENTRY, SerialNumber),
 891        CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE,
 892        offsetof(CRL_ENTRY, SerialNumber.pbData), 0 },
 893      { 0, offsetof(CRL_ENTRY, RevocationDate), CRYPT_AsnDecodeChoiceOfTime,
 894        sizeof(FILETIME), FALSE, FALSE, 0 },
 895      { ASN_SEQUENCEOF, offsetof(CRL_ENTRY, cExtension),
 896        CRYPT_AsnDecodeExtensionsInternal, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
 897        offsetof(CRL_ENTRY, rgExtension), 0 },
 898     };
 899     PCRL_ENTRY entry = (PCRL_ENTRY)pvStructInfo;
 900
 901     TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, entry,
 902      *pcbStructInfo);
 903
 904     ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
 905      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
 906      NULL, entry, pcbStructInfo, entry ? entry->SerialNumber.pbData : NULL);
 907     return ret;
 908 }
 909
 910 /* Warning: assumes pvStructInfo is a struct GenericArray whose rgItems has
 911  * been set prior to calling.
 912  */
 913 static BOOL WINAPI CRYPT_AsnDecodeCRLEntries(DWORD dwCertEncodingType,
 914  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 915  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 916 {
 917     BOOL ret;
 918     struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
 919      CRYPT_AsnDecodeCRLEntry, sizeof(CRL_ENTRY), TRUE,
 920      offsetof(CRL_ENTRY, SerialNumber.pbData) };
 921     struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
 922
 923     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
 924      pDecodePara, pvStructInfo, *pcbStructInfo);
 925
 926     ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
 927      pDecodePara, pvStructInfo, pcbStructInfo,
 928      entries ? entries->rgItems : NULL);
 929     TRACE("Returning %d (%08lx)\n", ret, GetLastError());
 930     return ret;
 931 }
 932
 933 static BOOL WINAPI CRYPT_AsnDecodeCRLInfo(DWORD dwCertEncodingType,
 934  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 935  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 936 {
 937     BOOL ret = TRUE;
 938
 939     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
 940      pDecodePara, pvStructInfo, *pcbStructInfo);
 941
 942     __TRY
 943     {
 944         struct AsnDecodeSequenceItem items[] = {
 945          { ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(CRL_INFO, dwVersion),
 946            CRYPT_AsnDecodeCertVersion, sizeof(DWORD), TRUE, FALSE, 0, 0 },
 947          { ASN_SEQUENCEOF, offsetof(CRL_INFO, SignatureAlgorithm),
 948            CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
 949            FALSE, TRUE, offsetof(CRL_INFO, SignatureAlgorithm.pszObjId), 0 },
 950          { 0, offsetof(CRL_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
 951            sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CRL_INFO,
 952            Issuer.pbData) },
 953          { 0, offsetof(CRL_INFO, ThisUpdate), CRYPT_AsnDecodeChoiceOfTime,
 954            sizeof(FILETIME), FALSE, FALSE, 0 },
 955          { 0, offsetof(CRL_INFO, NextUpdate), CRYPT_AsnDecodeChoiceOfTime,
 956            sizeof(FILETIME), TRUE, FALSE, 0 },
 957          { ASN_SEQUENCEOF, offsetof(CRL_INFO, cCRLEntry),
 958            CRYPT_AsnDecodeCRLEntries, sizeof(struct GenericArray), TRUE, TRUE,
 959            offsetof(CRL_INFO, rgCRLEntry), 0 },
 960          /* Note that the extensions are ignored by MS, so I'll ignore them too
 961           */
 962          { 0, offsetof(CRL_INFO, cExtension), NULL,
 963            sizeof(CERT_EXTENSIONS), TRUE, FALSE, 0 },
 964         };
 965
 966         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
 967          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
 968          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
 969     }
 970     __EXCEPT_PAGE_FAULT
 971     {
 972         SetLastError(STATUS_ACCESS_VIOLATION);
 973         ret = FALSE;
 974     }
 975     __ENDTRY
 976
 977     TRACE("Returning %d (%08lx)\n", ret, GetLastError());
 978     return ret;
 979 }
 980
 981 static BOOL WINAPI CRYPT_AsnDecodeOidInternal(DWORD dwCertEncodingType,
 982  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 983  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
 984 {
 985     BOOL ret = TRUE;
 986
 987     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
 988      pDecodePara, pvStructInfo, *pcbStructInfo);
 989
 990     if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
 991     {
 992         DWORD dataLen;
 993
 994         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
 995         {
 996             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
 997             DWORD bytesNeeded = sizeof(LPSTR);
 998
 999             if (dataLen)
1000             {
1001                 /* The largest possible string for the first two components
1002                  * is 2.175 (= 2 * 40 + 175 = 255), so this is big enough.
1003                  */
1004                 char firstTwo[6];
1005                 const BYTE *ptr;
1006
1007                 snprintf(firstTwo, sizeof(firstTwo), "%d.%d",
1008                  pbEncoded[1 + lenBytes] / 40,
1009                  pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
1010                  * 40);
1011                 bytesNeeded += strlen(firstTwo) + 1;
1012                 for (ptr = pbEncoded + 2 + lenBytes; ret &&
1013                  ptr - pbEncoded - 1 - lenBytes < dataLen; )
1014                 {
1015                     /* large enough for ".4000000" */
1016                     char str[9];
1017                     int val = 0;
1018
1019                     while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1020                      (*ptr & 0x80))
1021                     {
1022                         val <<= 7;
1023                         val |= *ptr & 0x7f;
1024                         ptr++;
1025                     }
1026                     if (ptr - pbEncoded - 1 - lenBytes >= dataLen ||
1027                      (*ptr & 0x80))
1028                     {
1029                         SetLastError(CRYPT_E_ASN1_CORRUPT);
1030                         ret = FALSE;
1031                     }
1032                     else
1033                     {
1034                         val <<= 7;
1035                         val |= *ptr++;
1036                         snprintf(str, sizeof(str), ".%d", val);
1037                         bytesNeeded += strlen(str);
1038                     }
1039                 }
1040             }
1041             if (!pvStructInfo)
1042                 *pcbStructInfo = bytesNeeded;
1043             else if (*pcbStructInfo < bytesNeeded)
1044             {
1045                 *pcbStructInfo = bytesNeeded;
1046                 SetLastError(ERROR_MORE_DATA);
1047                 ret = FALSE;
1048             }
1049             else
1050             {
1051                 if (dataLen)
1052                 {
1053                     const BYTE *ptr;
1054                     LPSTR pszObjId = *(LPSTR *)pvStructInfo;
1055
1056                     *pszObjId = 0;
1057                     sprintf(pszObjId, "%d.%d", pbEncoded[1 + lenBytes] / 40,
1058                      pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] /
1059                      40) * 40);
1060                     pszObjId += strlen(pszObjId);
1061                     for (ptr = pbEncoded + 2 + lenBytes; ret &&
1062                      ptr - pbEncoded - 1 - lenBytes < dataLen; )
1063                     {
1064                         int val = 0;
1065
1066                         while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1067                          (*ptr & 0x80))
1068                         {
1069                             val <<= 7;
1070                             val |= *ptr & 0x7f;
1071                             ptr++;
1072                         }
1073                         val <<= 7;
1074                         val |= *ptr++;
1075                         sprintf(pszObjId, ".%d", val);
1076                         pszObjId += strlen(pszObjId);
1077                     }
1078                 }
1079                 else
1080                     *(LPSTR *)pvStructInfo = NULL;
1081                 *pcbStructInfo = bytesNeeded;
1082             }
1083         }
1084     }
1085     return ret;
1086 }
1087
1088 /* Warning:  assumes pvStructInfo is a CERT_EXTENSION whose pszObjId is set
1089  * ahead of time!
1090  */
1091 static BOOL WINAPI CRYPT_AsnDecodeExtension(DWORD dwCertEncodingType,
1092  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1093  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1094 {
1095     struct AsnDecodeSequenceItem items[] = {
1096      { ASN_OBJECTIDENTIFIER, offsetof(CERT_EXTENSION, pszObjId),
1097        CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1098        offsetof(CERT_EXTENSION, pszObjId), 0 },
1099      { ASN_BOOL, offsetof(CERT_EXTENSION, fCritical), CRYPT_AsnDecodeBool,
1100        sizeof(BOOL), TRUE, FALSE, 0, 0 },
1101      { ASN_OCTETSTRING, offsetof(CERT_EXTENSION, Value),
1102        CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_OBJID_BLOB), FALSE, TRUE,
1103        offsetof(CERT_EXTENSION, Value.pbData) },
1104     };
1105     BOOL ret = TRUE;
1106     PCERT_EXTENSION ext = (PCERT_EXTENSION)pvStructInfo;
1107
1108     TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, ext,
1109      *pcbStructInfo);
1110
1111     if (ext)
1112         TRACE("ext->pszObjId is %p\n", ext->pszObjId);
1113     ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
1114      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags, NULL,
1115      ext, pcbStructInfo, ext ? ext->pszObjId : NULL);
1116     if (ext)
1117         TRACE("ext->pszObjId is %p (%s)\n", ext->pszObjId,
1118          debugstr_a(ext->pszObjId));
1119     TRACE("returning %d (%08lx)\n", ret, GetLastError());
1120     return ret;
1121 }
1122
1123 static BOOL WINAPI CRYPT_AsnDecodeExtensionsInternal(DWORD dwCertEncodingType,
1124  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1125  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1126 {
1127     BOOL ret = TRUE;
1128     struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1129      CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
1130      offsetof(CERT_EXTENSION, pszObjId) };
1131     PCERT_EXTENSIONS exts = (PCERT_EXTENSIONS)pvStructInfo;
1132
1133     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1134      pDecodePara, pvStructInfo, *pcbStructInfo);
1135
1136     ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1137      pDecodePara, pvStructInfo, pcbStructInfo, exts ? exts->rgExtension : NULL);
1138     return ret;
1139 }
1140
1141 static BOOL WINAPI CRYPT_AsnDecodeExtensions(DWORD dwCertEncodingType,
1142  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1143  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1144 {
1145     BOOL ret = TRUE;
1146
1147     __TRY
1148     {
1149         ret = CRYPT_AsnDecodeExtensionsInternal(dwCertEncodingType,
1150          lpszStructType, pbEncoded, cbEncoded,
1151          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, pcbStructInfo);
1152         if (ret && pvStructInfo)
1153         {
1154             ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
1155              pcbStructInfo, *pcbStructInfo);
1156             if (ret)
1157             {
1158                 CERT_EXTENSIONS *exts;
1159
1160                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1161                     pvStructInfo = *(BYTE **)pvStructInfo;
1162                 exts = (CERT_EXTENSIONS *)pvStructInfo;
1163                 exts->rgExtension = (CERT_EXTENSION *)((BYTE *)exts +
1164                  sizeof(CERT_EXTENSIONS));
1165                 ret = CRYPT_AsnDecodeExtensionsInternal(dwCertEncodingType,
1166                  lpszStructType, pbEncoded, cbEncoded,
1167                  dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1168                  pcbStructInfo);
1169             }
1170         }
1171     }
1172     __EXCEPT_PAGE_FAULT
1173     {
1174         SetLastError(STATUS_ACCESS_VIOLATION);
1175         ret = FALSE;
1176     }
1177     __ENDTRY
1178     return ret;
1179 }
1180
1181 /* Warning: this assumes the address of value->Value.pbData is already set, in
1182  * order to avoid overwriting memory.  (In some cases, it may change it, if it
1183  * doesn't copy anything to memory.)  Be sure to set it correctly!
1184  */
1185 static BOOL WINAPI CRYPT_AsnDecodeNameValue(DWORD dwCertEncodingType,
1186  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1187  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1188 {
1189     BOOL ret = TRUE;
1190
1191     __TRY
1192     {
1193         DWORD dataLen;
1194         CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
1195
1196         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1197         {
1198             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1199
1200             switch (pbEncoded[0])
1201             {
1202             case ASN_NUMERICSTRING:
1203             case ASN_PRINTABLESTRING:
1204             case ASN_IA5STRING:
1205                 break;
1206             default:
1207                 FIXME("Unimplemented string type %02x\n", pbEncoded[0]);
1208                 SetLastError(OSS_UNIMPLEMENTED);
1209                 ret = FALSE;
1210             }
1211             if (ret)
1212             {
1213                 DWORD bytesNeeded = sizeof(CERT_NAME_VALUE);
1214
1215                 switch (pbEncoded[0])
1216                 {
1217                 case ASN_NUMERICSTRING:
1218                 case ASN_PRINTABLESTRING:
1219                 case ASN_IA5STRING:
1220                     if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1221                         bytesNeeded += dataLen;
1222                     break;
1223                 }
1224                 if (!value)
1225                     *pcbStructInfo = bytesNeeded;
1226                 else if (*pcbStructInfo < bytesNeeded)
1227                 {
1228                     *pcbStructInfo = bytesNeeded;
1229                     SetLastError(ERROR_MORE_DATA);
1230                     ret = FALSE;
1231                 }
1232                 else
1233                 {
1234                     *pcbStructInfo = bytesNeeded;
1235                     switch (pbEncoded[0])
1236                     {
1237                     case ASN_NUMERICSTRING:
1238                         value->dwValueType = CERT_RDN_NUMERIC_STRING;
1239                         break;
1240                     case ASN_PRINTABLESTRING:
1241                         value->dwValueType = CERT_RDN_PRINTABLE_STRING;
1242                         break;
1243                     case ASN_IA5STRING:
1244                         value->dwValueType = CERT_RDN_IA5_STRING;
1245                         break;
1246                     }
1247                     if (dataLen)
1248                     {
1249                         switch (pbEncoded[0])
1250                         {
1251                         case ASN_NUMERICSTRING:
1252                         case ASN_PRINTABLESTRING:
1253                         case ASN_IA5STRING:
1254                             value->Value.cbData = dataLen;
1255                             if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1256                                 value->Value.pbData = (BYTE *)pbEncoded + 1 +
1257                                  lenBytes;
1258                             else
1259                             {
1260                                 assert(value->Value.pbData);
1261                                 memcpy(value->Value.pbData,
1262                                  pbEncoded + 1 + lenBytes, dataLen);
1263                             }
1264                             break;
1265                         }
1266                     }
1267                     else
1268                     {
1269                         value->Value.cbData = 0;
1270                         value->Value.pbData = NULL;
1271                     }
1272                 }
1273             }
1274         }
1275     }
1276     __EXCEPT_PAGE_FAULT
1277     {
1278         SetLastError(STATUS_ACCESS_VIOLATION);
1279         ret = FALSE;
1280     }
1281     __ENDTRY
1282     return ret;
1283 }
1284
1285 static BOOL WINAPI CRYPT_AsnDecodeRdnAttr(DWORD dwCertEncodingType,
1286  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1287  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1288 {
1289     BOOL ret;
1290
1291     TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1292      pvStructInfo, *pcbStructInfo);
1293
1294     __TRY
1295     {
1296         struct AsnDecodeSequenceItem items[] = {
1297          { ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
1298            CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1299            offsetof(CERT_RDN_ATTR, pszObjId), 0 },
1300          { 0, offsetof(CERT_RDN_ATTR, dwValueType), CRYPT_AsnDecodeNameValue,
1301            sizeof(CERT_NAME_VALUE), FALSE, TRUE, offsetof(CERT_RDN_ATTR,
1302            Value.pbData), 0 },
1303         };
1304         CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
1305
1306         if (attr)
1307             TRACE("attr->pszObjId is %p\n", attr->pszObjId);
1308         ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
1309          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags, NULL,
1310          attr, pcbStructInfo, attr ? attr->pszObjId : NULL);
1311         if (attr)
1312         {
1313             TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
1314              debugstr_a(attr->pszObjId));
1315             TRACE("attr->dwValueType is %ld\n", attr->dwValueType);
1316         }
1317         TRACE("returning %d (%08lx)\n", ret, GetLastError());
1318     }
1319     __EXCEPT_PAGE_FAULT
1320     {
1321         SetLastError(STATUS_ACCESS_VIOLATION);
1322         ret = FALSE;
1323     }
1324     __ENDTRY
1325     return ret;
1326 }
1327
1328 static BOOL WINAPI CRYPT_AsnDecodeRdn(DWORD dwCertEncodingType,
1329  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1330  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1331 {
1332     BOOL ret = TRUE;
1333
1334     __TRY
1335     {
1336         struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
1337          CRYPT_AsnDecodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
1338          offsetof(CERT_RDN_ATTR, pszObjId) };
1339         PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
1340
1341         ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1342          pDecodePara, pvStructInfo, pcbStructInfo, rdn ? rdn->rgRDNAttr : NULL);
1343     }
1344     __EXCEPT_PAGE_FAULT
1345     {
1346         SetLastError(STATUS_ACCESS_VIOLATION);
1347         ret = FALSE;
1348     }
1349     __ENDTRY
1350     return ret;
1351 }
1352
1353 static BOOL WINAPI CRYPT_AsnDecodeName(DWORD dwCertEncodingType,
1354  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1355  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1356 {
1357     BOOL ret = TRUE;
1358
1359     __TRY
1360     {
1361         struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1362          CRYPT_AsnDecodeRdn, sizeof(CERT_RDN), TRUE,
1363          offsetof(CERT_RDN, rgRDNAttr) };
1364
1365         ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1366          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1367     }
1368     __EXCEPT_PAGE_FAULT
1369     {
1370         SetLastError(STATUS_ACCESS_VIOLATION);
1371         ret = FALSE;
1372     }
1373     __ENDTRY
1374     return ret;
1375 }
1376
1377 static BOOL WINAPI CRYPT_AsnDecodeCopyBytes(DWORD dwCertEncodingType,
1378  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1379  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1380 {
1381     BOOL ret = TRUE;
1382     DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB);
1383
1384     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1385      pDecodePara, pvStructInfo, *pcbStructInfo);
1386
1387     if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1388         bytesNeeded += cbEncoded;
1389     if (!pvStructInfo)
1390         *pcbStructInfo = bytesNeeded;
1391     else if (*pcbStructInfo < bytesNeeded)
1392     {
1393         SetLastError(ERROR_MORE_DATA);
1394         *pcbStructInfo = bytesNeeded;
1395         ret = FALSE;
1396     }
1397     else
1398     {
1399         PCRYPT_OBJID_BLOB blob = (PCRYPT_OBJID_BLOB)pvStructInfo;
1400
1401         *pcbStructInfo = bytesNeeded;
1402         blob->cbData = cbEncoded;
1403         if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1404             blob->pbData = (LPBYTE)pbEncoded;
1405         else
1406         {
1407             assert(blob->pbData);
1408             memcpy(blob->pbData, pbEncoded, blob->cbData);
1409         }
1410     }
1411     return ret;
1412 }
1413
1414 static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
1415  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1416  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1417 {
1418     CRYPT_ALGORITHM_IDENTIFIER *algo =
1419      (CRYPT_ALGORITHM_IDENTIFIER *)pvStructInfo;
1420     BOOL ret = TRUE;
1421     struct AsnDecodeSequenceItem items[] = {
1422      { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId),
1423        CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
1424        offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId), 0 },
1425      { 0, offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters),
1426        CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
1427        offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters.pbData), 0 },
1428     };
1429
1430     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1431      pDecodePara, pvStructInfo, *pcbStructInfo);
1432
1433     ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1434      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1435      pDecodePara, pvStructInfo, pcbStructInfo, algo ? algo->pszObjId : NULL);
1436     if (ret && pvStructInfo)
1437     {
1438         TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
1439          debugstr_a(algo->pszObjId));
1440     }
1441     return ret;
1442 }
1443
1444 static BOOL WINAPI CRYPT_AsnDecodePubKeyInfoInternal(DWORD dwCertEncodingType,
1445  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1446  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1447 {
1448     BOOL ret = TRUE;
1449     struct AsnDecodeSequenceItem items[] = {
1450      { ASN_SEQUENCEOF, offsetof(CERT_PUBLIC_KEY_INFO, Algorithm),
1451        CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
1452        FALSE, TRUE, offsetof(CERT_PUBLIC_KEY_INFO,
1453        Algorithm.pszObjId) },
1454      { ASN_BITSTRING, offsetof(CERT_PUBLIC_KEY_INFO, PublicKey),
1455        CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
1456        offsetof(CERT_PUBLIC_KEY_INFO, PublicKey.pbData) },
1457     };
1458     PCERT_PUBLIC_KEY_INFO info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
1459
1460     ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1461      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1462      pDecodePara, pvStructInfo, pcbStructInfo, info ?
1463      info->Algorithm.Parameters.pbData : NULL);
1464     return ret;
1465 }
1466
1467 static BOOL WINAPI CRYPT_AsnDecodePubKeyInfo(DWORD dwCertEncodingType,
1468  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1469  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1470 {
1471     BOOL ret = TRUE;
1472
1473     __TRY
1474     {
1475         DWORD bytesNeeded;
1476
1477         if ((ret = CRYPT_AsnDecodePubKeyInfoInternal(dwCertEncodingType,
1478          lpszStructType, pbEncoded, cbEncoded,
1479          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
1480         {
1481             if (!pvStructInfo)
1482                 *pcbStructInfo = bytesNeeded;
1483             else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
1484              pvStructInfo, pcbStructInfo, bytesNeeded)))
1485             {
1486                 PCERT_PUBLIC_KEY_INFO info;
1487
1488                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1489                     pvStructInfo = *(BYTE **)pvStructInfo;
1490                 info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
1491                 info->Algorithm.Parameters.pbData = (BYTE *)pvStructInfo +
1492                  sizeof(CERT_PUBLIC_KEY_INFO);
1493                 ret = CRYPT_AsnDecodePubKeyInfoInternal(dwCertEncodingType,
1494                  lpszStructType, pbEncoded, cbEncoded,
1495                  dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1496                  &bytesNeeded);
1497             }
1498         }
1499     }
1500     __EXCEPT_PAGE_FAULT
1501     {
1502         SetLastError(STATUS_ACCESS_VIOLATION);
1503         ret = FALSE;
1504     }
1505     __ENDTRY
1506     return ret;
1507 }
1508
1509 static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
1510  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1511  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1512 {
1513     BOOL ret;
1514
1515     if (cbEncoded < 3)
1516     {
1517         SetLastError(CRYPT_E_ASN1_CORRUPT);
1518         return FALSE;
1519     }
1520     if (GET_LEN_BYTES(pbEncoded[1]) > 1)
1521     {
1522         SetLastError(CRYPT_E_ASN1_CORRUPT);
1523         return FALSE;
1524     }
1525     if (pbEncoded[1] > 1)
1526     {
1527         SetLastError(CRYPT_E_ASN1_CORRUPT);
1528         return FALSE;
1529     }
1530     if (!pvStructInfo)
1531     {
1532         *pcbStructInfo = sizeof(BOOL);
1533         ret = TRUE;
1534     }
1535     else if (*pcbStructInfo < sizeof(BOOL))
1536     {
1537         *pcbStructInfo = sizeof(BOOL);
1538         SetLastError(ERROR_MORE_DATA);
1539         ret = FALSE;
1540     }
1541     else
1542     {
1543         *(BOOL *)pvStructInfo = pbEncoded[2] ? TRUE : FALSE;
1544         ret = TRUE;
1545     }
1546     TRACE("returning %d (%08lx)\n", ret, GetLastError());
1547     return ret;
1548 }
1549
1550 static BOOL WINAPI CRYPT_AsnDecodeAltNameEntry(DWORD dwCertEncodingType,
1551  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1552  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1553 {
1554     PCERT_ALT_NAME_ENTRY entry = (PCERT_ALT_NAME_ENTRY)pvStructInfo;
1555     DWORD dataLen, lenBytes, bytesNeeded = sizeof(CERT_ALT_NAME_ENTRY);
1556     BOOL ret;
1557
1558     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1559      pDecodePara, pvStructInfo, *pcbStructInfo);
1560
1561     if (cbEncoded < 2)
1562     {
1563         SetLastError(CRYPT_E_ASN1_CORRUPT);
1564         return FALSE;
1565     }
1566     if ((pbEncoded[0] & ASN_FLAGS_MASK) != ASN_CONTEXT)
1567     {
1568         SetLastError(CRYPT_E_ASN1_BADTAG);
1569         return FALSE;
1570     }
1571     lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1572     if (1 + lenBytes > cbEncoded)
1573     {
1574         SetLastError(CRYPT_E_ASN1_CORRUPT);
1575         return FALSE;
1576     }
1577     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1578     {
1579         switch (pbEncoded[0] & ASN_TYPE_MASK)
1580         {
1581         case 1: /* rfc822Name */
1582         case 2: /* dNSName */
1583         case 6: /* uniformResourceIdentifier */
1584             bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
1585             break;
1586         case 7: /* iPAddress */
1587             bytesNeeded += dataLen;
1588             break;
1589         case 8: /* registeredID */
1590             /* FIXME: decode as OID */
1591         case 0: /* otherName */
1592         case 4: /* directoryName */
1593             FIXME("stub\n");
1594             SetLastError(CRYPT_E_ASN1_BADTAG);
1595             ret = FALSE;
1596             break;
1597         case 3: /* x400Address, unimplemented */
1598         case 5: /* ediPartyName, unimplemented */
1599             SetLastError(CRYPT_E_ASN1_BADTAG);
1600             ret = FALSE;
1601             break;
1602         default:
1603             SetLastError(CRYPT_E_ASN1_CORRUPT);
1604             ret = FALSE;
1605         }
1606         if (ret)
1607         {
1608             if (!entry)
1609                 *pcbStructInfo = bytesNeeded;
1610             else if (*pcbStructInfo < bytesNeeded)
1611             {
1612                 *pcbStructInfo = bytesNeeded;
1613                 SetLastError(ERROR_MORE_DATA);
1614                 ret = FALSE;
1615             }
1616             else
1617             {
1618                 *pcbStructInfo = bytesNeeded;
1619                 /* MS used values one greater than the asn1 ones.. sigh */
1620                 entry->dwAltNameChoice = (pbEncoded[0] & 0x7f) + 1;
1621                 switch (pbEncoded[0] & ASN_TYPE_MASK)
1622                 {
1623                 case 1: /* rfc822Name */
1624                 case 2: /* dNSName */
1625                 case 6: /* uniformResourceIdentifier */
1626                 {
1627                     DWORD i;
1628
1629                     for (i = 0; i < dataLen; i++)
1630                         entry->u.pwszURL[i] =
1631                          (WCHAR)pbEncoded[1 + lenBytes + i];
1632                     entry->u.pwszURL[i] = 0;
1633                     TRACE("URL is %p (%s)\n", entry->u.pwszURL,
1634                      debugstr_w(entry->u.pwszURL));
1635                     break;
1636                 }
1637                 case 7: /* iPAddress */
1638                     /* The next data pointer is in the pwszURL spot, that is,
1639                      * the first 4 bytes.  Need to move it to the next spot.
1640                      */
1641                     entry->u.IPAddress.pbData = (LPBYTE)entry->u.pwszURL;
1642                     entry->u.IPAddress.cbData = dataLen;
1643                     memcpy(entry->u.IPAddress.pbData, pbEncoded + 1 + lenBytes,
1644                      dataLen);
1645                     break;
1646                 }
1647             }
1648         }
1649     }
1650     return ret;
1651 }
1652
1653 static BOOL WINAPI CRYPT_AsnDecodeAltNameInternal(DWORD dwCertEncodingType,
1654  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1655  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1656 {
1657     BOOL ret = TRUE;
1658     struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1659      CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
1660      offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
1661     PCERT_ALT_NAME_INFO info = (PCERT_ALT_NAME_INFO)pvStructInfo;
1662
1663     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1664      pDecodePara, pvStructInfo, *pcbStructInfo);
1665
1666     if (info)
1667         TRACE("info->rgAltEntry is %p\n", info->rgAltEntry);
1668     ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1669      pDecodePara, pvStructInfo, pcbStructInfo, info ? info->rgAltEntry : NULL);
1670     return ret;
1671 }
1672
1673 static BOOL WINAPI CRYPT_AsnDecodeAltName(DWORD dwCertEncodingType,
1674  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1675  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1676 {
1677     BOOL ret = TRUE;
1678
1679     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1680      pDecodePara, pvStructInfo, *pcbStructInfo);
1681
1682     __TRY
1683     {
1684         struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1685          CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
1686          offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
1687
1688         ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1689          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1690     }
1691     __EXCEPT_PAGE_FAULT
1692     {
1693         SetLastError(STATUS_ACCESS_VIOLATION);
1694         ret = FALSE;
1695     }
1696     __ENDTRY
1697     return ret;
1698 }
1699
1700 struct PATH_LEN_CONSTRAINT
1701 {
1702     BOOL  fPathLenConstraint;
1703     DWORD dwPathLenConstraint;
1704 };
1705
1706 static BOOL WINAPI CRYPT_AsnDecodePathLenConstraint(DWORD dwCertEncodingType,
1707  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1708  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1709 {
1710     BOOL ret = TRUE;
1711
1712     TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1713      pvStructInfo, *pcbStructInfo);
1714
1715     if (cbEncoded)
1716     {
1717         if (pbEncoded[0] == ASN_INTEGER)
1718         {
1719             DWORD bytesNeeded = sizeof(struct PATH_LEN_CONSTRAINT);
1720
1721             if (!pvStructInfo)
1722                 *pcbStructInfo = bytesNeeded;
1723             else if (*pcbStructInfo < bytesNeeded)
1724             {
1725                 SetLastError(ERROR_MORE_DATA);
1726                 *pcbStructInfo = bytesNeeded;
1727                 ret = FALSE;
1728             }
1729             else
1730             {
1731                 struct PATH_LEN_CONSTRAINT *constraint =
1732                  (struct PATH_LEN_CONSTRAINT *)pvStructInfo;
1733                 DWORD size = sizeof(constraint->dwPathLenConstraint);
1734
1735                 ret = CRYPT_AsnDecodeInt(dwCertEncodingType, X509_INTEGER,
1736                  pbEncoded, cbEncoded, 0, NULL,
1737                  &constraint->dwPathLenConstraint, &size);
1738                 if (ret)
1739                     constraint->fPathLenConstraint = TRUE;
1740                 TRACE("got an int, dwPathLenConstraint is %ld\n",
1741                  constraint->dwPathLenConstraint);
1742             }
1743         }
1744         else
1745         {
1746             SetLastError(CRYPT_E_ASN1_CORRUPT);
1747             ret = FALSE;
1748         }
1749     }
1750     TRACE("returning %d (%08lx)\n", ret, GetLastError());
1751     return ret;
1752 }
1753
1754 static BOOL WINAPI CRYPT_AsnDecodeSubtreeConstraints(DWORD dwCertEncodingType,
1755  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1756  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1757 {
1758     BOOL ret;
1759     struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
1760      CRYPT_AsnDecodeCopyBytes, sizeof(CERT_NAME_BLOB), TRUE,
1761      offsetof(CERT_NAME_BLOB, pbData) };
1762     struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
1763
1764     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1765      pDecodePara, pvStructInfo, *pcbStructInfo);
1766
1767     ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
1768      pDecodePara, pvStructInfo, pcbStructInfo,
1769      entries ? entries->rgItems : NULL);
1770     TRACE("Returning %d (%08lx)\n", ret, GetLastError());
1771     return ret;
1772 }
1773
1774 static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints(DWORD dwCertEncodingType,
1775  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1776  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1777 {
1778     BOOL ret;
1779
1780     __TRY
1781     {
1782         struct AsnDecodeSequenceItem items[] = {
1783          { ASN_BITSTRING, offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType),
1784            CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
1785            offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType.pbData), 0 },
1786          { ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
1787            fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
1788            sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
1789          { ASN_SEQUENCEOF, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
1790            cSubtreesConstraint), CRYPT_AsnDecodeSubtreeConstraints,
1791            sizeof(struct GenericArray), TRUE, TRUE,
1792            offsetof(CERT_BASIC_CONSTRAINTS_INFO, rgSubtreesConstraint), 0 },
1793         };
1794
1795         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1796          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1797          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1798     }
1799     __EXCEPT_PAGE_FAULT
1800     {
1801         SetLastError(STATUS_ACCESS_VIOLATION);
1802         ret = FALSE;
1803     }
1804     __ENDTRY
1805     return ret;
1806 }
1807
1808 static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints2(DWORD dwCertEncodingType,
1809  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1810  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1811 {
1812     BOOL ret;
1813
1814     __TRY
1815     {
1816         struct AsnDecodeSequenceItem items[] = {
1817          { ASN_BOOL, offsetof(CERT_BASIC_CONSTRAINTS2_INFO, fCA),
1818            CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0, 0 },
1819          { ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS2_INFO,
1820            fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
1821            sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
1822         };
1823
1824         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1825          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1826          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
1827     }
1828     __EXCEPT_PAGE_FAULT
1829     {
1830         SetLastError(STATUS_ACCESS_VIOLATION);
1831         ret = FALSE;
1832     }
1833     __ENDTRY
1834     return ret;
1835 }
1836
1837 #define RSA1_MAGIC 0x31415352
1838
1839 struct DECODED_RSA_PUB_KEY
1840 {
1841     DWORD              pubexp;
1842     CRYPT_INTEGER_BLOB modulus;
1843 };
1844
1845 static BOOL WINAPI CRYPT_AsnDecodeRsaPubKey(DWORD dwCertEncodingType,
1846  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1847  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1848 {
1849     BOOL ret;
1850
1851     __TRY
1852     {
1853         struct AsnDecodeSequenceItem items[] = {
1854          { ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, modulus),
1855            CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
1856            FALSE, TRUE, offsetof(struct DECODED_RSA_PUB_KEY, modulus.pbData),
1857            0 },
1858          { ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, pubexp),
1859            CRYPT_AsnDecodeInt, sizeof(DWORD), FALSE, FALSE, 0, 0 },
1860         };
1861         struct DECODED_RSA_PUB_KEY *decodedKey = NULL;
1862         DWORD size = 0;
1863
1864         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1865          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded,
1866          CRYPT_DECODE_ALLOC_FLAG, NULL, &decodedKey, &size, NULL);
1867         if (ret)
1868         {
1869             DWORD bytesNeeded = sizeof(BLOBHEADER) + sizeof(RSAPUBKEY) +
1870              decodedKey->modulus.cbData;
1871
1872             if (!pvStructInfo)
1873             {
1874                 *pcbStructInfo = bytesNeeded;
1875                 ret = TRUE;
1876             }
1877             else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
1878              pvStructInfo, pcbStructInfo, bytesNeeded)))
1879             {
1880                 BLOBHEADER *hdr;
1881                 RSAPUBKEY *rsaPubKey;
1882
1883                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1884                     pvStructInfo = *(BYTE **)pvStructInfo;
1885                 hdr = (BLOBHEADER *)pvStructInfo;
1886                 hdr->bType = PUBLICKEYBLOB;
1887                 hdr->bVersion = CUR_BLOB_VERSION;
1888                 hdr->reserved = 0;
1889                 hdr->aiKeyAlg = CALG_RSA_KEYX;
1890                 rsaPubKey = (RSAPUBKEY *)((BYTE *)pvStructInfo +
1891                  sizeof(BLOBHEADER));
1892                 rsaPubKey->magic = RSA1_MAGIC;
1893                 rsaPubKey->pubexp = decodedKey->pubexp;
1894                 rsaPubKey->bitlen = decodedKey->modulus.cbData * 8;
1895                 memcpy((BYTE *)pvStructInfo + sizeof(BLOBHEADER) +
1896                  sizeof(RSAPUBKEY), decodedKey->modulus.pbData,
1897                  decodedKey->modulus.cbData);
1898             }
1899             LocalFree(decodedKey);
1900         }
1901     }
1902     __EXCEPT_PAGE_FAULT
1903     {
1904         SetLastError(STATUS_ACCESS_VIOLATION);
1905         ret = FALSE;
1906     }
1907     __ENDTRY
1908     return ret;
1909 }
1910
1911 static BOOL WINAPI CRYPT_AsnDecodeOctetsInternal(DWORD dwCertEncodingType,
1912  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1913  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1914 {
1915     BOOL ret;
1916     DWORD bytesNeeded, dataLen;
1917
1918     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1919      pDecodePara, pvStructInfo, *pcbStructInfo);
1920
1921     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1922     {
1923         if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1924             bytesNeeded = sizeof(CRYPT_DATA_BLOB);
1925         else
1926             bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
1927         if (!pvStructInfo)
1928             *pcbStructInfo = bytesNeeded;
1929         else if (*pcbStructInfo < bytesNeeded)
1930         {
1931             SetLastError(ERROR_MORE_DATA);
1932             *pcbStructInfo = bytesNeeded;
1933             ret = FALSE;
1934         }
1935         else
1936         {
1937             CRYPT_DATA_BLOB *blob;
1938             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1939
1940             blob = (CRYPT_DATA_BLOB *)pvStructInfo;
1941             blob->cbData = dataLen;
1942             if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1943                 blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
1944             else
1945             {
1946                 assert(blob->pbData);
1947                 if (blob->cbData)
1948                     memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
1949                      blob->cbData);
1950             }
1951         }
1952     }
1953     return ret;
1954 }
1955
1956 static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
1957  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1958  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
1959 {
1960     BOOL ret;
1961
1962     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
1963      pDecodePara, pvStructInfo, *pcbStructInfo);
1964
1965     __TRY
1966     {
1967         DWORD bytesNeeded;
1968
1969         if (!cbEncoded)
1970         {
1971             SetLastError(CRYPT_E_ASN1_CORRUPT);
1972             ret = FALSE;
1973         }
1974         else if (pbEncoded[0] != ASN_OCTETSTRING)
1975         {
1976             SetLastError(CRYPT_E_ASN1_BADTAG);
1977             ret = FALSE;
1978         }
1979         else if ((ret = CRYPT_AsnDecodeOctetsInternal(dwCertEncodingType,
1980          lpszStructType, pbEncoded, cbEncoded,
1981          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
1982         {
1983             if (!pvStructInfo)
1984                 *pcbStructInfo = bytesNeeded;
1985             else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
1986              pvStructInfo, pcbStructInfo, bytesNeeded)))
1987             {
1988                 CRYPT_DATA_BLOB *blob;
1989
1990                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
1991                     pvStructInfo = *(BYTE **)pvStructInfo;
1992                 blob = (CRYPT_DATA_BLOB *)pvStructInfo;
1993                 blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_DATA_BLOB);
1994                 ret = CRYPT_AsnDecodeOctetsInternal(dwCertEncodingType,
1995                  lpszStructType, pbEncoded, cbEncoded,
1996                  dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
1997                  &bytesNeeded);
1998             }
1999         }
2000     }
2001     __EXCEPT_PAGE_FAULT
2002     {
2003         SetLastError(STATUS_ACCESS_VIOLATION);
2004         ret = FALSE;
2005     }
2006     __ENDTRY
2007     return ret;
2008 }
2009
2010 static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
2011  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2012  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2013 {
2014     BOOL ret;
2015
2016     TRACE("(%p, %ld, 0x%08lx, %p, %p, %ld)\n", pbEncoded, cbEncoded, dwFlags,
2017      pDecodePara, pvStructInfo, *pcbStructInfo);
2018
2019     if (pbEncoded[0] == ASN_BITSTRING)
2020     {
2021         DWORD bytesNeeded, dataLen;
2022
2023         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2024         {
2025             if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2026                 bytesNeeded = sizeof(CRYPT_BIT_BLOB);
2027             else
2028                 bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
2029             if (!pvStructInfo)
2030                 *pcbStructInfo = bytesNeeded;
2031             else if (*pcbStructInfo < bytesNeeded)
2032             {
2033                 *pcbStructInfo = bytesNeeded;
2034                 SetLastError(ERROR_MORE_DATA);
2035                 ret = FALSE;
2036             }
2037             else
2038             {
2039                 CRYPT_BIT_BLOB *blob;
2040
2041                 blob = (CRYPT_BIT_BLOB *)pvStructInfo;
2042                 blob->cbData = dataLen - 1;
2043                 blob->cUnusedBits = *(pbEncoded + 1 +
2044                  GET_LEN_BYTES(pbEncoded[1]));
2045                 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2046                 {
2047                     blob->pbData = (BYTE *)pbEncoded + 2 +
2048                      GET_LEN_BYTES(pbEncoded[1]);
2049                 }
2050                 else
2051                 {
2052                     assert(blob->pbData);
2053                     if (blob->cbData)
2054                     {
2055                         BYTE mask = 0xff << blob->cUnusedBits;
2056
2057                         memcpy(blob->pbData, pbEncoded + 2 +
2058                          GET_LEN_BYTES(pbEncoded[1]), blob->cbData);
2059                         blob->pbData[blob->cbData - 1] &= mask;
2060                     }
2061                 }
2062             }
2063         }
2064     }
2065     else
2066     {
2067         SetLastError(CRYPT_E_ASN1_BADTAG);
2068         ret = FALSE;
2069     }
2070     TRACE("returning %d (%08lx)\n", ret, GetLastError());
2071     return ret;
2072 }
2073
2074 static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
2075  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2076  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2077 {
2078     BOOL ret;
2079
2080     TRACE("(%p, %ld, 0x%08lx, %p, %p, %p)\n", pbEncoded, cbEncoded, dwFlags,
2081      pDecodePara, pvStructInfo, pcbStructInfo);
2082
2083     __TRY
2084     {
2085         DWORD bytesNeeded;
2086
2087         if ((ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType,
2088          lpszStructType, pbEncoded, cbEncoded,
2089          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2090         {
2091             if (!pvStructInfo)
2092                 *pcbStructInfo = bytesNeeded;
2093             else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2094              pvStructInfo, pcbStructInfo, bytesNeeded)))
2095             {
2096                 CRYPT_BIT_BLOB *blob;
2097
2098                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2099                     pvStructInfo = *(BYTE **)pvStructInfo;
2100                 blob = (CRYPT_BIT_BLOB *)pvStructInfo;
2101                 blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_BIT_BLOB);
2102                 ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType,
2103                  lpszStructType, pbEncoded, cbEncoded,
2104                  dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
2105                  &bytesNeeded);
2106             }
2107         }
2108     }
2109     __EXCEPT_PAGE_FAULT
2110     {
2111         SetLastError(STATUS_ACCESS_VIOLATION);
2112         ret = FALSE;
2113     }
2114     __ENDTRY
2115     TRACE("returning %d (%08lx)\n", ret, GetLastError());
2116     return ret;
2117 }
2118
2119 static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
2120  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2121  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2122 {
2123     BOOL ret;
2124
2125     if (!pvStructInfo)
2126     {
2127         *pcbStructInfo = sizeof(int);
2128         return TRUE;
2129     }
2130     __TRY
2131     {
2132         BYTE buf[sizeof(CRYPT_INTEGER_BLOB) + sizeof(int)];
2133         CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)buf;
2134         DWORD size = sizeof(buf);
2135
2136         blob->pbData = buf + sizeof(CRYPT_INTEGER_BLOB);
2137         ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
2138          X509_MULTI_BYTE_INTEGER, pbEncoded, cbEncoded, 0, NULL, &buf, &size);
2139         if (ret)
2140         {
2141             if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2142              pvStructInfo, pcbStructInfo, sizeof(int))))
2143             {
2144                 int val, i;
2145
2146                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2147                     pvStructInfo = *(BYTE **)pvStructInfo;
2148                 if (blob->pbData[blob->cbData - 1] & 0x80)
2149                 {
2150                     /* initialize to a negative value to sign-extend */
2151                     val = -1;
2152                 }
2153                 else
2154                     val = 0;
2155                 for (i = 0; i < blob->cbData; i++)
2156                 {
2157                     val <<= 8;
2158                     val |= blob->pbData[blob->cbData - i - 1];
2159                 }
2160                 memcpy(pvStructInfo, &val, sizeof(int));
2161             }
2162         }
2163         else if (GetLastError() == ERROR_MORE_DATA)
2164             SetLastError(CRYPT_E_ASN1_LARGE);
2165     }
2166     __EXCEPT_PAGE_FAULT
2167     {
2168         SetLastError(STATUS_ACCESS_VIOLATION);
2169         ret = FALSE;
2170     }
2171     __ENDTRY
2172     return ret;
2173 }
2174
2175 static BOOL WINAPI CRYPT_AsnDecodeIntegerInternal(DWORD dwCertEncodingType,
2176  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2177  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2178 {
2179     BOOL ret;
2180
2181     if (pbEncoded[0] == ASN_INTEGER)
2182     {
2183         DWORD bytesNeeded, dataLen;
2184
2185         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2186         {
2187             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2188
2189             bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
2190             if (!pvStructInfo)
2191                 *pcbStructInfo = bytesNeeded;
2192             else if (*pcbStructInfo < bytesNeeded)
2193             {
2194                 *pcbStructInfo = bytesNeeded;
2195                 SetLastError(ERROR_MORE_DATA);
2196                 ret = FALSE;
2197             }
2198             else
2199             {
2200                 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2201
2202                 blob->cbData = dataLen;
2203                 assert(blob->pbData);
2204                 if (blob->cbData)
2205                 {
2206                     DWORD i;
2207
2208                     for (i = 0; i < blob->cbData; i++)
2209                     {
2210                         blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
2211                          dataLen - i - 1);
2212                     }
2213                 }
2214             }
2215         }
2216     }
2217     else
2218     {
2219         SetLastError(CRYPT_E_ASN1_BADTAG);
2220         ret = FALSE;
2221     }
2222     return ret;
2223 }
2224
2225 static BOOL WINAPI CRYPT_AsnDecodeInteger(DWORD dwCertEncodingType,
2226  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2227  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2228 {
2229     BOOL ret;
2230
2231     __TRY
2232     {
2233         DWORD bytesNeeded;
2234
2235         if ((ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
2236          lpszStructType, pbEncoded, cbEncoded,
2237          dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2238         {
2239             if (!pvStructInfo)
2240                 *pcbStructInfo = bytesNeeded;
2241             else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2242              pvStructInfo, pcbStructInfo, bytesNeeded)))
2243             {
2244                 CRYPT_INTEGER_BLOB *blob;
2245
2246                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2247                     pvStructInfo = *(BYTE **)pvStructInfo;
2248                 blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2249                 blob->pbData = (BYTE *)pvStructInfo +
2250                  sizeof(CRYPT_INTEGER_BLOB);
2251                 ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
2252                  lpszStructType, pbEncoded, cbEncoded,
2253                  dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, pvStructInfo,
2254                  &bytesNeeded);
2255             }
2256         }
2257     }
2258     __EXCEPT_PAGE_FAULT
2259     {
2260         SetLastError(STATUS_ACCESS_VIOLATION);
2261         ret = FALSE;
2262     }
2263     __ENDTRY
2264     return ret;
2265 }
2266
2267 static BOOL WINAPI CRYPT_AsnDecodeUnsignedIntegerInternal(
2268  DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
2269  DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
2270  void *pvStructInfo, DWORD *pcbStructInfo)
2271 {
2272     BOOL ret;
2273
2274     if (pbEncoded[0] == ASN_INTEGER)
2275     {
2276         DWORD bytesNeeded, dataLen;
2277
2278         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2279         {
2280             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2281
2282             bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
2283             if (!pvStructInfo)
2284                 *pcbStructInfo = bytesNeeded;
2285             else if (*pcbStructInfo < bytesNeeded)
2286             {
2287                 *pcbStructInfo = bytesNeeded;
2288                 SetLastError(ERROR_MORE_DATA);
2289                 ret = FALSE;
2290             }
2291             else
2292             {
2293                 CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2294
2295                 blob->cbData = dataLen;
2296                 assert(blob->pbData);
2297                 /* remove leading zero byte if it exists */
2298                 if (blob->cbData && *(pbEncoded + 1 + lenBytes) == 0)
2299                 {
2300                     blob->cbData--;
2301                     blob->pbData++;
2302                 }
2303                 if (blob->cbData)
2304                 {
2305                     DWORD i;
2306
2307                     for (i = 0; i < blob->cbData; i++)
2308                     {
2309                         blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
2310                          dataLen - i - 1);
2311                     }
2312                 }
2313             }
2314         }
2315     }
2316     else
2317     {
2318         SetLastError(CRYPT_E_ASN1_BADTAG);
2319         ret = FALSE;
2320     }
2321     return ret;
2322 }
2323
2324 static BOOL WINAPI CRYPT_AsnDecodeUnsignedInteger(DWORD dwCertEncodingType,
2325  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2326  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2327 {
2328     BOOL ret;
2329
2330     __TRY
2331     {
2332         DWORD bytesNeeded;
2333
2334         if ((ret = CRYPT_AsnDecodeUnsignedIntegerInternal(dwCertEncodingType,
2335          lpszStructType, pbEncoded, cbEncoded,
2336          dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
2337         {
2338             if (!pvStructInfo)
2339                 *pcbStructInfo = bytesNeeded;
2340             else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2341              pvStructInfo, pcbStructInfo, bytesNeeded)))
2342             {
2343                 CRYPT_INTEGER_BLOB *blob;
2344
2345                 if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2346                     pvStructInfo = *(BYTE **)pvStructInfo;
2347                 blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
2348                 blob->pbData = (BYTE *)pvStructInfo +
2349                  sizeof(CRYPT_INTEGER_BLOB);
2350                 ret = CRYPT_AsnDecodeUnsignedIntegerInternal(dwCertEncodingType,
2351                  lpszStructType, pbEncoded, cbEncoded,
2352                  dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, pvStructInfo,
2353                  &bytesNeeded);
2354             }
2355         }
2356     }
2357     __EXCEPT_PAGE_FAULT
2358     {
2359         SetLastError(STATUS_ACCESS_VIOLATION);
2360         ret = FALSE;
2361     }
2362     __ENDTRY
2363     return ret;
2364 }
2365
2366 static BOOL WINAPI CRYPT_AsnDecodeEnumerated(DWORD dwCertEncodingType,
2367  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2368  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2369 {
2370     BOOL ret;
2371
2372     if (!pvStructInfo)
2373     {
2374         *pcbStructInfo = sizeof(int);
2375         return TRUE;
2376     }
2377     __TRY
2378     {
2379         if (pbEncoded[0] == ASN_ENUMERATED)
2380         {
2381             unsigned int val = 0, i;
2382
2383             if (cbEncoded <= 1)
2384             {
2385                 SetLastError(CRYPT_E_ASN1_EOD);
2386                 ret = FALSE;
2387             }
2388             else if (pbEncoded[1] == 0)
2389             {
2390                 SetLastError(CRYPT_E_ASN1_CORRUPT);
2391                 ret = FALSE;
2392             }
2393             else
2394             {
2395                 /* A little strange looking, but we have to accept a sign byte:
2396                  * 0xffffffff gets encoded as 0a 05 00 ff ff ff ff.  Also,
2397                  * assuming a small length is okay here, it has to be in short
2398                  * form.
2399                  */
2400                 if (pbEncoded[1] > sizeof(unsigned int) + 1)
2401                 {
2402                     SetLastError(CRYPT_E_ASN1_LARGE);
2403                     return FALSE;
2404                 }
2405                 for (i = 0; i < pbEncoded[1]; i++)
2406                 {
2407                     val <<= 8;
2408                     val |= pbEncoded[2 + i];
2409                 }
2410                 if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2411                  pvStructInfo, pcbStructInfo, sizeof(unsigned int))))
2412                 {
2413                     if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2414                         pvStructInfo = *(BYTE **)pvStructInfo;
2415                     memcpy(pvStructInfo, &val, sizeof(unsigned int));
2416                 }
2417             }
2418         }
2419         else
2420         {
2421             SetLastError(CRYPT_E_ASN1_BADTAG);
2422             ret = FALSE;
2423         }
2424     }
2425     __EXCEPT_PAGE_FAULT
2426     {
2427         SetLastError(STATUS_ACCESS_VIOLATION);
2428         ret = FALSE;
2429     }
2430     __ENDTRY
2431     return ret;
2432 }
2433
2434 /* Modifies word, pbEncoded, and len, and magically sets a value ret to FALSE
2435  * if it fails.
2436  */
2437 #define CRYPT_TIME_GET_DIGITS(pbEncoded, len, numDigits, word) \
2438  do { \
2439     BYTE i; \
2440  \
2441     (word) = 0; \
2442     for (i = 0; (len) > 0 && i < (numDigits); i++, (len)--) \
2443     { \
2444         if (!isdigit(*(pbEncoded))) \
2445         { \
2446             SetLastError(CRYPT_E_ASN1_CORRUPT); \
2447             ret = FALSE; \
2448         } \
2449         else \
2450         { \
2451             (word) *= 10; \
2452             (word) += *(pbEncoded)++ - '0'; \
2453         } \
2454     } \
2455  } while (0)
2456
2457 static BOOL CRYPT_AsnDecodeTimeZone(const BYTE *pbEncoded, DWORD len,
2458  SYSTEMTIME *sysTime)
2459 {
2460     BOOL ret;
2461
2462     __TRY
2463     {
2464         ret = TRUE;
2465         if (len >= 3 && (*pbEncoded == '+' || *pbEncoded == '-'))
2466         {
2467             WORD hours, minutes = 0;
2468             BYTE sign = *pbEncoded++;
2469
2470             len--;
2471             CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, hours);
2472             if (ret && hours >= 24)
2473             {
2474                 SetLastError(CRYPT_E_ASN1_CORRUPT);
2475                 ret = FALSE;
2476             }
2477             else if (len >= 2)
2478             {
2479                 CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, minutes);
2480                 if (ret && minutes >= 60)
2481                 {
2482                     SetLastError(CRYPT_E_ASN1_CORRUPT);
2483                     ret = FALSE;
2484                 }
2485             }
2486             if (ret)
2487             {
2488                 if (sign == '+')
2489                 {
2490                     sysTime->wHour += hours;
2491                     sysTime->wMinute += minutes;
2492                 }
2493                 else
2494                 {
2495                     if (hours > sysTime->wHour)
2496                     {
2497                         sysTime->wDay--;
2498                         sysTime->wHour = 24 - (hours - sysTime->wHour);
2499                     }
2500                     else
2501                         sysTime->wHour -= hours;
2502                     if (minutes > sysTime->wMinute)
2503                     {
2504                         sysTime->wHour--;
2505                         sysTime->wMinute = 60 - (minutes - sysTime->wMinute);
2506                     }
2507                     else
2508                         sysTime->wMinute -= minutes;
2509                 }
2510             }
2511         }
2512     }
2513     __EXCEPT_PAGE_FAULT
2514     {
2515         SetLastError(STATUS_ACCESS_VIOLATION);
2516         ret = FALSE;
2517     }
2518     __ENDTRY
2519     return ret;
2520 }
2521
2522 #define MIN_ENCODED_TIME_LENGTH 10
2523
2524 static BOOL WINAPI CRYPT_AsnDecodeUtcTime(DWORD dwCertEncodingType,
2525  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2526  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2527 {
2528     BOOL ret;
2529
2530     if (!pvStructInfo)
2531     {
2532         *pcbStructInfo = sizeof(FILETIME);
2533         return TRUE;
2534     }
2535     __TRY
2536     {
2537         ret = TRUE;
2538         if (pbEncoded[0] == ASN_UTCTIME)
2539         {
2540             if (cbEncoded <= 1)
2541             {
2542                 SetLastError(CRYPT_E_ASN1_EOD);
2543                 ret = FALSE;
2544             }
2545             else if (pbEncoded[1] > 0x7f)
2546             {
2547                 /* long-form date strings really can't be valid */
2548                 SetLastError(CRYPT_E_ASN1_CORRUPT);
2549                 ret = FALSE;
2550             }
2551             else
2552             {
2553                 SYSTEMTIME sysTime = { 0 };
2554                 BYTE len = pbEncoded[1];
2555
2556                 if (len < MIN_ENCODED_TIME_LENGTH)
2557                 {
2558                     SetLastError(CRYPT_E_ASN1_CORRUPT);
2559                     ret = FALSE;
2560                 }
2561                 else
2562                 {
2563                     pbEncoded += 2;
2564                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wYear);
2565                     if (sysTime.wYear >= 50)
2566                         sysTime.wYear += 1900;
2567                     else
2568                         sysTime.wYear += 2000;
2569                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
2570                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
2571                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
2572                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMinute);
2573                     if (ret && len > 0)
2574                     {
2575                         if (len >= 2 && isdigit(*pbEncoded) &&
2576                          isdigit(*(pbEncoded + 1)))
2577                             CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
2578                              sysTime.wSecond);
2579                         else if (isdigit(*pbEncoded))
2580                             CRYPT_TIME_GET_DIGITS(pbEncoded, len, 1,
2581                              sysTime.wSecond);
2582                         if (ret)
2583                             ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
2584                              &sysTime);
2585                     }
2586                     if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags,
2587                      pDecodePara, pvStructInfo, pcbStructInfo,
2588                      sizeof(FILETIME))))
2589                     {
2590                         if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2591                             pvStructInfo = *(BYTE **)pvStructInfo;
2592                         ret = SystemTimeToFileTime(&sysTime,
2593                          (FILETIME *)pvStructInfo);
2594                     }
2595                 }
2596             }
2597         }
2598         else
2599         {
2600             SetLastError(CRYPT_E_ASN1_BADTAG);
2601             ret = FALSE;
2602         }
2603     }
2604     __EXCEPT_PAGE_FAULT
2605     {
2606         SetLastError(STATUS_ACCESS_VIOLATION);
2607         ret = FALSE;
2608     }
2609     __ENDTRY
2610     return ret;
2611 }
2612
2613 static BOOL WINAPI CRYPT_AsnDecodeGeneralizedTime(DWORD dwCertEncodingType,
2614  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2615  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2616 {
2617     BOOL ret;
2618
2619     if (!pvStructInfo)
2620     {
2621         *pcbStructInfo = sizeof(FILETIME);
2622         return TRUE;
2623     }
2624     __TRY
2625     {
2626         ret = TRUE;
2627         if (pbEncoded[0] == ASN_GENERALTIME)
2628         {
2629             if (cbEncoded <= 1)
2630             {
2631                 SetLastError(CRYPT_E_ASN1_EOD);
2632                 ret = FALSE;
2633             }
2634             else if (pbEncoded[1] > 0x7f)
2635             {
2636                 /* long-form date strings really can't be valid */
2637                 SetLastError(CRYPT_E_ASN1_CORRUPT);
2638                 ret = FALSE;
2639             }
2640             else
2641             {
2642                 BYTE len = pbEncoded[1];
2643
2644                 if (len < MIN_ENCODED_TIME_LENGTH)
2645                 {
2646                     SetLastError(CRYPT_E_ASN1_CORRUPT);
2647                     ret = FALSE;
2648                 }
2649                 else
2650                 {
2651                     SYSTEMTIME sysTime = { 0 };
2652
2653                     pbEncoded += 2;
2654                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 4, sysTime.wYear);
2655                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
2656                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
2657                     CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
2658                     if (ret && len > 0)
2659                     {
2660                         CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
2661                          sysTime.wMinute);
2662                         if (ret && len > 0)
2663                             CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
2664                              sysTime.wSecond);
2665                         if (ret && len > 0 && (*pbEncoded == '.' ||
2666                          *pbEncoded == ','))
2667                         {
2668                             BYTE digits;
2669
2670                             pbEncoded++;
2671                             len--;
2672                             /* workaround macro weirdness */
2673                             digits = min(len, 3);
2674                             CRYPT_TIME_GET_DIGITS(pbEncoded, len, digits,
2675                              sysTime.wMilliseconds);
2676                         }
2677                         if (ret)
2678                             ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
2679                              &sysTime);
2680                     }
2681                     if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags,
2682                      pDecodePara, pvStructInfo, pcbStructInfo,
2683                      sizeof(FILETIME))))
2684                     {
2685                         if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2686                             pvStructInfo = *(BYTE **)pvStructInfo;
2687                         ret = SystemTimeToFileTime(&sysTime,
2688                          (FILETIME *)pvStructInfo);
2689                     }
2690                 }
2691             }
2692         }
2693         else
2694         {
2695             SetLastError(CRYPT_E_ASN1_BADTAG);
2696             ret = FALSE;
2697         }
2698     }
2699     __EXCEPT_PAGE_FAULT
2700     {
2701         SetLastError(STATUS_ACCESS_VIOLATION);
2702         ret = FALSE;
2703     }
2704     __ENDTRY
2705     return ret;
2706 }
2707
2708 static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(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         if (pbEncoded[0] == ASN_UTCTIME)
2717             ret = CRYPT_AsnDecodeUtcTime(dwCertEncodingType, lpszStructType,
2718              pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
2719              pcbStructInfo);
2720         else if (pbEncoded[0] == ASN_GENERALTIME)
2721             ret = CRYPT_AsnDecodeGeneralizedTime(dwCertEncodingType,
2722              lpszStructType, pbEncoded, cbEncoded, dwFlags, pDecodePara,
2723              pvStructInfo, pcbStructInfo);
2724         else
2725         {
2726             SetLastError(CRYPT_E_ASN1_BADTAG);
2727             ret = FALSE;
2728         }
2729     }
2730     __EXCEPT_PAGE_FAULT
2731     {
2732         SetLastError(STATUS_ACCESS_VIOLATION);
2733         ret = FALSE;
2734     }
2735     __ENDTRY
2736     return ret;
2737 }
2738
2739 static BOOL WINAPI CRYPT_AsnDecodeSequenceOfAny(DWORD dwCertEncodingType,
2740  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2741  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2742 {
2743     BOOL ret = TRUE;
2744
2745     __TRY
2746     {
2747         if (pbEncoded[0] == ASN_SEQUENCEOF)
2748         {
2749             DWORD bytesNeeded, dataLen, remainingLen, cValue;
2750
2751             if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2752             {
2753                 BYTE lenBytes;
2754                 const BYTE *ptr;
2755
2756                 lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2757                 bytesNeeded = sizeof(CRYPT_SEQUENCE_OF_ANY);
2758                 cValue = 0;
2759                 ptr = pbEncoded + 1 + lenBytes;
2760                 remainingLen = dataLen;
2761                 while (ret && remainingLen)
2762                 {
2763                     DWORD nextLen;
2764
2765                     ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
2766                     if (ret)
2767                     {
2768                         DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
2769
2770                         remainingLen -= 1 + nextLenBytes + nextLen;
2771                         ptr += 1 + nextLenBytes + nextLen;
2772                         bytesNeeded += sizeof(CRYPT_DER_BLOB);
2773                         if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
2774                             bytesNeeded += 1 + nextLenBytes + nextLen;
2775                         cValue++;
2776                     }
2777                 }
2778                 if (ret)
2779                 {
2780                     CRYPT_SEQUENCE_OF_ANY *seq;
2781                     BYTE *nextPtr;
2782                     DWORD i;
2783
2784                     if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
2785                      pvStructInfo, pcbStructInfo, bytesNeeded)))
2786                     {
2787                         if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
2788                             pvStructInfo = *(BYTE **)pvStructInfo;
2789                         seq = (CRYPT_SEQUENCE_OF_ANY *)pvStructInfo;
2790                         seq->cValue = cValue;
2791                         seq->rgValue = (CRYPT_DER_BLOB *)((BYTE *)seq +
2792                          sizeof(*seq));
2793                         nextPtr = (BYTE *)seq->rgValue +
2794                          cValue * sizeof(CRYPT_DER_BLOB);
2795                         ptr = pbEncoded + 1 + lenBytes;
2796                         remainingLen = dataLen;
2797                         i = 0;
2798                         while (ret && remainingLen)
2799                         {
2800                             DWORD nextLen;
2801
2802                             ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
2803                             if (ret)
2804                             {
2805                                 DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
2806
2807                                 seq->rgValue[i].cbData = 1 + nextLenBytes +
2808                                  nextLen;
2809                                 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
2810                                     seq->rgValue[i].pbData = (BYTE *)ptr;
2811                                 else
2812                                 {
2813                                     seq->rgValue[i].pbData = nextPtr;
2814                                     memcpy(nextPtr, ptr, 1 + nextLenBytes +
2815                                      nextLen);
2816                                     nextPtr += 1 + nextLenBytes + nextLen;
2817                                 }
2818                                 remainingLen -= 1 + nextLenBytes + nextLen;
2819                                 ptr += 1 + nextLenBytes + nextLen;
2820                                 i++;
2821                             }
2822                         }
2823                     }
2824                 }
2825             }
2826         }
2827         else
2828         {
2829             SetLastError(CRYPT_E_ASN1_BADTAG);
2830             return FALSE;
2831         }
2832     }
2833     __EXCEPT_PAGE_FAULT
2834     {
2835         SetLastError(STATUS_ACCESS_VIOLATION);
2836         ret = FALSE;
2837     }
2838     __ENDTRY
2839     return ret;
2840 }
2841
2842 static BOOL WINAPI CRYPT_AsnDecodeDistPoint(DWORD dwCertEncodingType,
2843  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2844  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2845 {
2846     struct AsnDecodeSequenceItem items[] = {
2847      { ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_DIST_POINT,
2848        DistPointName), CRYPT_AsnDecodeAltNameInternal,
2849        sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE, offsetof(CRL_DIST_POINT,
2850        DistPointName.u.FullName.rgAltEntry), 0 },
2851      { ASN_CONTEXT | 1, offsetof(CRL_DIST_POINT, ReasonFlags),
2852        CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
2853        offsetof(CRL_DIST_POINT, ReasonFlags.pbData), 0 },
2854      { ASN_CONTEXT | ASN_CONSTRUCTOR | 2, offsetof(CRL_DIST_POINT, CRLIssuer),
2855        CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE, TRUE,
2856        offsetof(CRL_DIST_POINT, CRLIssuer.rgAltEntry), 0 },
2857     };
2858     BOOL ret;
2859
2860     ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2861      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded,
2862      dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
2863     return ret;
2864 }
2865
2866 static BOOL WINAPI CRYPT_AsnDecodeCRLDistPoints(DWORD dwCertEncodingType,
2867  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2868  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2869 {
2870     BOOL ret;
2871
2872     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2873      pDecodePara, pvStructInfo, *pcbStructInfo);
2874
2875     __TRY
2876     {
2877         struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2878          CRYPT_AsnDecodeDistPoint, sizeof(CRL_DIST_POINT), TRUE,
2879          offsetof(CRL_DIST_POINT, DistPointName.u.FullName.rgAltEntry) };
2880
2881         ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2882          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
2883     }
2884     __EXCEPT_PAGE_FAULT
2885     {
2886         SetLastError(STATUS_ACCESS_VIOLATION);
2887         ret = FALSE;
2888     }
2889     __ENDTRY
2890     return ret;
2891 }
2892
2893 static BOOL WINAPI CRYPT_AsnDecodeEnhancedKeyUsage(DWORD dwCertEncodingType,
2894  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2895  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2896 {
2897     BOOL ret;
2898
2899     TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
2900      pDecodePara, pvStructInfo, *pcbStructInfo);
2901
2902     __TRY
2903     {
2904         struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
2905          CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
2906
2907         ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
2908          pDecodePara, pvStructInfo, pcbStructInfo, NULL);
2909     }
2910     __EXCEPT_PAGE_FAULT
2911     {
2912         SetLastError(STATUS_ACCESS_VIOLATION);
2913         ret = FALSE;
2914     }
2915     __ENDTRY
2916     return ret;
2917 }
2918
2919 BOOL WINAPI CryptDecodeObjectEx(DWORD dwCertEncodingType, LPCSTR lpszStructType,
2920  const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2921  PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
2922 {
2923     static HCRYPTOIDFUNCSET set = NULL;
2924     BOOL ret = FALSE;
2925     CryptDecodeObjectExFunc decodeFunc = NULL;
2926     HCRYPTOIDFUNCADDR hFunc = NULL;
2927
2928     TRACE("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p, %p)\n",
2929      dwCertEncodingType, debugstr_a(lpszStructType), pbEncoded,
2930      cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
2931
2932     if (!pvStructInfo && !pcbStructInfo)
2933     {
2934         SetLastError(ERROR_INVALID_PARAMETER);
2935         return FALSE;
2936     }
2937     if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
2938      && (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
2939     {
2940         SetLastError(ERROR_FILE_NOT_FOUND);
2941         return FALSE;
2942     }
2943     if (!cbEncoded)
2944     {
2945         SetLastError(CRYPT_E_ASN1_EOD);
2946         return FALSE;
2947     }
2948     if (cbEncoded > MAX_ENCODED_LEN)
2949     {
2950         SetLastError(CRYPT_E_ASN1_LARGE);
2951         return FALSE;
2952     }
2953
2954     SetLastError(NOERROR);
2955     if (dwFlags & CRYPT_DECODE_ALLOC_FLAG && pvStructInfo)
2956         *(BYTE **)pvStructInfo = NULL;
2957     if (!HIWORD(lpszStructType))
2958     {
2959         switch (LOWORD(lpszStructType))
2960         {
2961         case (WORD)X509_CERT:
2962             decodeFunc = CRYPT_AsnDecodeCert;
2963             break;
2964         case (WORD)X509_CERT_TO_BE_SIGNED:
2965             decodeFunc = CRYPT_AsnDecodeCertInfo;
2966             break;
2967         case (WORD)X509_CERT_CRL_TO_BE_SIGNED:
2968             decodeFunc = CRYPT_AsnDecodeCRLInfo;
2969             break;
2970         case (WORD)X509_EXTENSIONS:
2971             decodeFunc = CRYPT_AsnDecodeExtensions;
2972             break;
2973         case (WORD)X509_NAME:
2974             decodeFunc = CRYPT_AsnDecodeName;
2975             break;
2976         case (WORD)X509_PUBLIC_KEY_INFO:
2977             decodeFunc = CRYPT_AsnDecodePubKeyInfo;
2978             break;
2979         case (WORD)X509_ALTERNATE_NAME:
2980             decodeFunc = CRYPT_AsnDecodeAltName;
2981             break;
2982         case (WORD)X509_BASIC_CONSTRAINTS:
2983             decodeFunc = CRYPT_AsnDecodeBasicConstraints;
2984             break;
2985         case (WORD)X509_BASIC_CONSTRAINTS2:
2986             decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
2987             break;
2988         case (WORD)RSA_CSP_PUBLICKEYBLOB:
2989             decodeFunc = CRYPT_AsnDecodeRsaPubKey;
2990             break;
2991         case (WORD)X509_OCTET_STRING:
2992             decodeFunc = CRYPT_AsnDecodeOctets;
2993             break;
2994         case (WORD)X509_BITS:
2995         case (WORD)X509_KEY_USAGE:
2996             decodeFunc = CRYPT_AsnDecodeBits;
2997             break;
2998         case (WORD)X509_INTEGER:
2999             decodeFunc = CRYPT_AsnDecodeInt;
3000             break;
3001         case (WORD)X509_MULTI_BYTE_INTEGER:
3002             decodeFunc = CRYPT_AsnDecodeInteger;
3003             break;
3004         case (WORD)X509_MULTI_BYTE_UINT:
3005             decodeFunc = CRYPT_AsnDecodeUnsignedInteger;
3006             break;
3007         case (WORD)X509_ENUMERATED:
3008             decodeFunc = CRYPT_AsnDecodeEnumerated;
3009             break;
3010         case (WORD)X509_CHOICE_OF_TIME:
3011             decodeFunc = CRYPT_AsnDecodeChoiceOfTime;
3012             break;
3013         case (WORD)X509_SEQUENCE_OF_ANY:
3014             decodeFunc = CRYPT_AsnDecodeSequenceOfAny;
3015             break;
3016         case (WORD)PKCS_UTC_TIME:
3017             decodeFunc = CRYPT_AsnDecodeUtcTime;
3018             break;
3019         case (WORD)X509_CRL_DIST_POINTS:
3020             decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
3021             break;
3022         case (WORD)X509_ENHANCED_KEY_USAGE:
3023             decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
3024             break;
3025         default:
3026             FIXME("%d: unimplemented\n", LOWORD(lpszStructType));
3027         }
3028     }
3029     else if (!strcmp(lpszStructType, szOID_CERT_EXTENSIONS))
3030         decodeFunc = CRYPT_AsnDecodeExtensions;
3031     else if (!strcmp(lpszStructType, szOID_RSA_signingTime))
3032         decodeFunc = CRYPT_AsnDecodeUtcTime;
3033     else if (!strcmp(lpszStructType, szOID_CRL_REASON_CODE))
3034         decodeFunc = CRYPT_AsnDecodeEnumerated;
3035     else if (!strcmp(lpszStructType, szOID_KEY_USAGE))
3036         decodeFunc = CRYPT_AsnDecodeBits;
3037     else if (!strcmp(lpszStructType, szOID_SUBJECT_KEY_IDENTIFIER))
3038         decodeFunc = CRYPT_AsnDecodeOctets;
3039     else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS))
3040         decodeFunc = CRYPT_AsnDecodeBasicConstraints;
3041     else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS2))
3042         decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
3043     else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME))
3044         decodeFunc = CRYPT_AsnDecodeAltName;
3045     else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME2))
3046         decodeFunc = CRYPT_AsnDecodeAltName;
3047     else if (!strcmp(lpszStructType, szOID_NEXT_UPDATE_LOCATION))
3048         decodeFunc = CRYPT_AsnDecodeAltName;
3049     else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME))
3050         decodeFunc = CRYPT_AsnDecodeAltName;
3051     else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME2))
3052         decodeFunc = CRYPT_AsnDecodeAltName;
3053     else if (!strcmp(lpszStructType, szOID_CRL_DIST_POINTS))
3054         decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
3055     else if (!strcmp(lpszStructType, szOID_ENHANCED_KEY_USAGE))
3056         decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
3057     else
3058         TRACE("OID %s not found or unimplemented, looking for DLL\n",
3059          debugstr_a(lpszStructType));
3060     if (!decodeFunc)
3061     {
3062         if (!set)
3063             set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_EX_FUNC, 0);
3064         CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
3065          (void **)&decodeFunc, &hFunc);
3066     }
3067     if (decodeFunc)
3068         ret = decodeFunc(dwCertEncodingType, lpszStructType, pbEncoded,
3069          cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
3070     else
3071         SetLastError(ERROR_FILE_NOT_FOUND);
3072     if (hFunc)
3073         CryptFreeOIDFunctionAddress(hFunc, 0);
3074     return ret;
3075 }