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   1 /* wintrust asn functions
   2  *
   3  * Copyright 2007 Juan Lang
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  *
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <assert.h>
  27 #define NONAMELESSUNION
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winerror.h"
  31 #include "wincrypt.h"
  32 #include "wintrust.h"
  33 #include "snmp.h"
  34 #include "winternl.h"
  35 #include "wine/debug.h"
  36 #include "wine/exception.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(cryptasn);
  39
  40 #ifdef WORDS_BIGENDIAN
  41
  42 #define hton16(x) (x)
  43 #define n16toh(x) (x)
  44
  45 #else
  46
  47 #define hton16(x) RtlUshortByteSwap(x)
  48 #define n16toh(x) RtlUshortByteSwap(x)
  49
  50 #endif
  51
  52 #define ASN_BOOL            (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x01)
  53 #define ASN_BITSTRING       (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x03)
  54 #define ASN_BMPSTRING       (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x1e)
  55
  56 static BOOL CRYPT_EncodeLen(DWORD len, BYTE *pbEncoded, DWORD *pcbEncoded)
  57 {
  58     DWORD bytesNeeded, significantBytes = 0;
  59
  60     if (len <= 0x7f)
  61         bytesNeeded = 1;
  62     else
  63     {
  64         DWORD temp;
  65
  66         for (temp = len, significantBytes = sizeof(temp); !(temp & 0xff000000);
  67          temp <<= 8, significantBytes--)
  68             ;
  69         bytesNeeded = significantBytes + 1;
  70     }
  71     if (!pbEncoded)
  72     {
  73         *pcbEncoded = bytesNeeded;
  74         return TRUE;
  75     }
  76     if (*pcbEncoded < bytesNeeded)
  77     {
  78         SetLastError(ERROR_MORE_DATA);
  79         return FALSE;
  80     }
  81     if (len <= 0x7f)
  82         *pbEncoded = (BYTE)len;
  83     else
  84     {
  85         DWORD i;
  86
  87         *pbEncoded++ = significantBytes | 0x80;
  88         for (i = 0; i < significantBytes; i++)
  89         {
  90             *(pbEncoded + significantBytes - i - 1) = (BYTE)(len & 0xff);
  91             len >>= 8;
  92         }
  93     }
  94     *pcbEncoded = bytesNeeded;
  95     return TRUE;
  96 }
  97
  98 static BOOL WINAPI CRYPT_AsnEncodeOctets(DWORD dwCertEncodingType,
  99  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 100  DWORD *pcbEncoded)
 101 {
 102     BOOL ret = TRUE;
 103     const CRYPT_DATA_BLOB *blob = pvStructInfo;
 104     DWORD bytesNeeded, lenBytes;
 105
 106     TRACE("(%d, %p), %p, %d\n", blob->cbData, blob->pbData, pbEncoded,
 107      *pcbEncoded);
 108
 109     CRYPT_EncodeLen(blob->cbData, NULL, &lenBytes);
 110     bytesNeeded = 1 + lenBytes + blob->cbData;
 111     if (!pbEncoded)
 112         *pcbEncoded = bytesNeeded;
 113     else if (*pcbEncoded < bytesNeeded)
 114     {
 115         *pcbEncoded = bytesNeeded;
 116         SetLastError(ERROR_MORE_DATA);
 117         ret = FALSE;
 118     }
 119     else
 120     {
 121         *pbEncoded++ = ASN_OCTETSTRING;
 122         CRYPT_EncodeLen(blob->cbData, pbEncoded, &lenBytes);
 123         pbEncoded += lenBytes;
 124         if (blob->cbData)
 125             memcpy(pbEncoded, blob->pbData, blob->cbData);
 126     }
 127     TRACE("returning %d\n", ret);
 128     return ret;
 129 }
 130
 131 BOOL WINAPI WVTAsn1SpcLinkEncode(DWORD dwCertEncodingType,
 132  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 133  DWORD *pcbEncoded)
 134 {
 135     BOOL ret = FALSE;
 136
 137     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
 138      debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
 139      pcbEncoded);
 140
 141     __TRY
 142     {
 143         const SPC_LINK *link = pvStructInfo;
 144         DWORD bytesNeeded, lenBytes;
 145
 146         switch (link->dwLinkChoice)
 147         {
 148         case SPC_FILE_LINK_CHOICE:
 149         {
 150             DWORD fileNameLen, fileNameLenBytes;
 151             LPWSTR ptr;
 152
 153             fileNameLen = link->u.pwszFile ?
 154              lstrlenW(link->u.pwszFile) * sizeof(WCHAR) : 0;
 155             CRYPT_EncodeLen(fileNameLen, NULL, &fileNameLenBytes);
 156             CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, NULL,
 157              &lenBytes);
 158             bytesNeeded = 2 + lenBytes + fileNameLenBytes + fileNameLen;
 159             if (!pbEncoded)
 160             {
 161                 *pcbEncoded = bytesNeeded;
 162                 ret = TRUE;
 163             }
 164             else if (*pcbEncoded < bytesNeeded)
 165             {
 166                 SetLastError(ERROR_MORE_DATA);
 167                 *pcbEncoded = bytesNeeded;
 168             }
 169             else
 170             {
 171                 *pcbEncoded = bytesNeeded;
 172                 *pbEncoded++ = ASN_CONSTRUCTOR | ASN_CONTEXT | 2;
 173                 CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, pbEncoded,
 174                  &lenBytes);
 175                 pbEncoded += lenBytes;
 176                 *pbEncoded++ = ASN_CONTEXT;
 177                 CRYPT_EncodeLen(fileNameLen, pbEncoded, &fileNameLenBytes);
 178                 pbEncoded += fileNameLenBytes;
 179                 for (ptr = link->u.pwszFile; ptr && *ptr; ptr++)
 180                 {
 181                     *(WCHAR *)pbEncoded = hton16(*ptr);
 182                     pbEncoded += sizeof(WCHAR);
 183                 }
 184                 ret = TRUE;
 185             }
 186             break;
 187         }
 188         case SPC_MONIKER_LINK_CHOICE:
 189         {
 190             DWORD classIdLenBytes, dataLenBytes, dataLen;
 191             CRYPT_DATA_BLOB classId = { sizeof(link->u.Moniker.ClassId),
 192              (BYTE *)link->u.Moniker.ClassId };
 193
 194             CRYPT_EncodeLen(classId.cbData, NULL, &classIdLenBytes);
 195             CRYPT_EncodeLen(link->u.Moniker.SerializedData.cbData, NULL,
 196              &dataLenBytes);
 197             dataLen = 2 + classIdLenBytes + classId.cbData +
 198              dataLenBytes + link->u.Moniker.SerializedData.cbData;
 199             CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
 200             bytesNeeded = 1 + dataLen + lenBytes;
 201             if (!pbEncoded)
 202             {
 203                 *pcbEncoded = bytesNeeded;
 204                 ret = TRUE;
 205             }
 206             else if (*pcbEncoded < bytesNeeded)
 207             {
 208                 SetLastError(ERROR_MORE_DATA);
 209                 *pcbEncoded = bytesNeeded;
 210             }
 211             else
 212             {
 213                 DWORD size;
 214
 215                 *pcbEncoded = bytesNeeded;
 216                 *pbEncoded++ = ASN_CONSTRUCTOR | ASN_CONTEXT | 1;
 217                 CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
 218                 pbEncoded += lenBytes;
 219                 size = 1 + classIdLenBytes + classId.cbData;
 220                 CRYPT_AsnEncodeOctets(X509_ASN_ENCODING, NULL, &classId,
 221                  pbEncoded, &size);
 222                 pbEncoded += size;
 223                 size = 1 + dataLenBytes + link->u.Moniker.SerializedData.cbData;
 224                 CRYPT_AsnEncodeOctets(X509_ASN_ENCODING, NULL,
 225                  &link->u.Moniker.SerializedData, pbEncoded, &size);
 226                 pbEncoded += size;
 227                 ret = TRUE;
 228             }
 229             break;
 230         }
 231         case SPC_URL_LINK_CHOICE:
 232         {
 233             LPWSTR ptr;
 234             DWORD urlLen;
 235
 236             /* Check for invalid characters in URL */
 237             ret = TRUE;
 238             urlLen = 0;
 239             for (ptr = link->u.pwszUrl; ptr && *ptr && ret; ptr++)
 240                 if (*ptr > 0x7f)
 241                 {
 242                     *pcbEncoded = 0;
 243                     SetLastError(CRYPT_E_INVALID_IA5_STRING);
 244                     ret = FALSE;
 245                 }
 246                 else
 247                     urlLen++;
 248             if (ret)
 249             {
 250                 CRYPT_EncodeLen(urlLen, NULL, &lenBytes);
 251                 bytesNeeded = 1 + lenBytes + urlLen;
 252                 if (!pbEncoded)
 253                     *pcbEncoded = bytesNeeded;
 254                 else if (*pcbEncoded < bytesNeeded)
 255                 {
 256                     SetLastError(ERROR_MORE_DATA);
 257                     *pcbEncoded = bytesNeeded;
 258                     ret = FALSE;
 259                 }
 260                 else
 261                 {
 262                     *pcbEncoded = bytesNeeded;
 263                     *pbEncoded++ = ASN_CONTEXT;
 264                     CRYPT_EncodeLen(urlLen, pbEncoded, &lenBytes);
 265                     pbEncoded += lenBytes;
 266                     for (ptr = link->u.pwszUrl; ptr && *ptr; ptr++)
 267                         *pbEncoded++ = (BYTE)*ptr;
 268                 }
 269             }
 270             break;
 271         }
 272         default:
 273             SetLastError(E_INVALIDARG);
 274         }
 275     }
 276     __EXCEPT_PAGE_FAULT
 277     {
 278         SetLastError(STATUS_ACCESS_VIOLATION);
 279     }
 280     __ENDTRY
 281     TRACE("returning %d\n", ret);
 282     return ret;
 283 }
 284
 285 typedef BOOL (WINAPI *CryptEncodeObjectFunc)(DWORD, LPCSTR, const void *,
 286  BYTE *, DWORD *);
 287
 288 struct AsnEncodeSequenceItem
 289 {
 290     const void           *pvStructInfo;
 291     CryptEncodeObjectFunc encodeFunc;
 292     DWORD                 size; /* used during encoding, not for your use */
 293 };
 294
 295 static BOOL CRYPT_AsnEncodeSequence(DWORD dwCertEncodingType,
 296  struct AsnEncodeSequenceItem items[], DWORD cItem, BYTE *pbEncoded,
 297  DWORD *pcbEncoded)
 298 {
 299     BOOL ret;
 300     DWORD i, dataLen = 0;
 301
 302     TRACE("%p, %d, %p, %d\n", items, cItem, pbEncoded, *pcbEncoded);
 303     for (i = 0, ret = TRUE; ret && i < cItem; i++)
 304     {
 305         ret = items[i].encodeFunc(dwCertEncodingType, NULL,
 306          items[i].pvStructInfo, NULL, &items[i].size);
 307         /* Some functions propagate their errors through the size */
 308         if (!ret)
 309             *pcbEncoded = items[i].size;
 310         dataLen += items[i].size;
 311     }
 312     if (ret)
 313     {
 314         DWORD lenBytes, bytesNeeded;
 315
 316         CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
 317         bytesNeeded = 1 + lenBytes + dataLen;
 318         if (!pbEncoded)
 319             *pcbEncoded = bytesNeeded;
 320         else if (*pcbEncoded < bytesNeeded)
 321         {
 322             *pcbEncoded = bytesNeeded;
 323             SetLastError(ERROR_MORE_DATA);
 324             ret = FALSE;
 325         }
 326         else
 327         {
 328             *pcbEncoded = bytesNeeded;
 329             *pbEncoded++ = ASN_SEQUENCE;
 330             CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
 331             pbEncoded += lenBytes;
 332             for (i = 0; ret && i < cItem; i++)
 333             {
 334                 ret = items[i].encodeFunc(dwCertEncodingType, NULL,
 335                  items[i].pvStructInfo, pbEncoded, &items[i].size);
 336                 /* Some functions propagate their errors through the size */
 337                 if (!ret)
 338                     *pcbEncoded = items[i].size;
 339                 pbEncoded += items[i].size;
 340             }
 341         }
 342     }
 343     TRACE("returning %d\n", ret);
 344     return ret;
 345 }
 346
 347 static BOOL WINAPI CRYPT_AsnEncodeBits(DWORD dwCertEncodingType,
 348  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 349  DWORD *pcbEncoded)
 350 {
 351     BOOL ret = FALSE;
 352
 353     __TRY
 354     {
 355         const CRYPT_BIT_BLOB *blob = pvStructInfo;
 356         DWORD bytesNeeded, lenBytes, dataBytes;
 357         BYTE unusedBits;
 358
 359         /* yep, MS allows cUnusedBits to be >= 8 */
 360         if (!blob->cUnusedBits)
 361         {
 362             dataBytes = blob->cbData;
 363             unusedBits = 0;
 364         }
 365         else if (blob->cbData * 8 > blob->cUnusedBits)
 366         {
 367             dataBytes = (blob->cbData * 8 - blob->cUnusedBits) / 8 + 1;
 368             unusedBits = blob->cUnusedBits >= 8 ? blob->cUnusedBits / 8 :
 369              blob->cUnusedBits;
 370         }
 371         else
 372         {
 373             dataBytes = 0;
 374             unusedBits = 0;
 375         }
 376         CRYPT_EncodeLen(dataBytes + 1, NULL, &lenBytes);
 377         bytesNeeded = 1 + lenBytes + dataBytes + 1;
 378         if (!pbEncoded)
 379         {
 380             *pcbEncoded = bytesNeeded;
 381             ret = TRUE;
 382         }
 383         else if (*pcbEncoded < bytesNeeded)
 384         {
 385             *pcbEncoded = bytesNeeded;
 386             SetLastError(ERROR_MORE_DATA);
 387         }
 388         else
 389         {
 390             ret = TRUE;
 391             *pcbEncoded = bytesNeeded;
 392             *pbEncoded++ = ASN_BITSTRING;
 393             CRYPT_EncodeLen(dataBytes + 1, pbEncoded, &lenBytes);
 394             pbEncoded += lenBytes;
 395             *pbEncoded++ = unusedBits;
 396             if (dataBytes)
 397             {
 398                 BYTE mask = 0xff << unusedBits;
 399
 400                 if (dataBytes > 1)
 401                 {
 402                     memcpy(pbEncoded, blob->pbData, dataBytes - 1);
 403                     pbEncoded += dataBytes - 1;
 404                 }
 405                 *pbEncoded = *(blob->pbData + dataBytes - 1) & mask;
 406             }
 407         }
 408     }
 409     __EXCEPT_PAGE_FAULT
 410     {
 411         SetLastError(STATUS_ACCESS_VIOLATION);
 412     }
 413     __ENDTRY
 414     return ret;
 415 }
 416
 417 struct AsnConstructedItem
 418 {
 419     BYTE                  tag;
 420     const void           *pvStructInfo;
 421     CryptEncodeObjectFunc encodeFunc;
 422 };
 423
 424 static BOOL WINAPI CRYPT_AsnEncodeConstructed(DWORD dwCertEncodingType,
 425  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 426  DWORD *pcbEncoded)
 427 {
 428     BOOL ret;
 429     const struct AsnConstructedItem *item = pvStructInfo;
 430     DWORD len;
 431
 432     if ((ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
 433      item->pvStructInfo, NULL, &len)))
 434     {
 435         DWORD dataLen, bytesNeeded;
 436
 437         CRYPT_EncodeLen(len, NULL, &dataLen);
 438         bytesNeeded = 1 + dataLen + len;
 439         if (!pbEncoded)
 440             *pcbEncoded = bytesNeeded;
 441         else if (*pcbEncoded < bytesNeeded)
 442         {
 443             *pcbEncoded = bytesNeeded;
 444             SetLastError(ERROR_MORE_DATA);
 445             ret = FALSE;
 446         }
 447         else
 448         {
 449             *pcbEncoded = bytesNeeded;
 450             *pbEncoded++ = ASN_CONTEXT | ASN_CONSTRUCTOR | item->tag;
 451             CRYPT_EncodeLen(len, pbEncoded, &dataLen);
 452             pbEncoded += dataLen;
 453             ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
 454              item->pvStructInfo, pbEncoded, &len);
 455             if (!ret)
 456             {
 457                 /* Some functions propagate their errors through the size */
 458                 *pcbEncoded = len;
 459             }
 460         }
 461     }
 462     else
 463     {
 464         /* Some functions propagate their errors through the size */
 465         *pcbEncoded = len;
 466     }
 467     return ret;
 468 }
 469
 470
 471 BOOL WINAPI WVTAsn1SpcPeImageDataEncode(DWORD dwCertEncodingType,
 472  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 473  DWORD *pcbEncoded)
 474 {
 475     const SPC_PE_IMAGE_DATA *imageData = pvStructInfo;
 476     BOOL ret = FALSE;
 477
 478     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
 479      debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
 480      pcbEncoded);
 481
 482     __TRY
 483     {
 484         struct AsnEncodeSequenceItem items[2] = {
 485          { 0 }
 486         };
 487         struct AsnConstructedItem constructed = { 0, imageData->pFile,
 488          WVTAsn1SpcLinkEncode };
 489         DWORD cItem = 0;
 490
 491         if (imageData->Flags.cbData)
 492         {
 493             items[cItem].pvStructInfo = &imageData->Flags;
 494             items[cItem].encodeFunc = CRYPT_AsnEncodeBits;
 495             cItem++;
 496         }
 497         if (imageData->pFile)
 498         {
 499             items[cItem].pvStructInfo = &constructed;
 500             items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
 501             cItem++;
 502         }
 503
 504         ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
 505          pbEncoded, pcbEncoded);
 506     }
 507     __EXCEPT_PAGE_FAULT
 508     {
 509         SetLastError(STATUS_ACCESS_VIOLATION);
 510     }
 511     __ENDTRY
 512     TRACE("returning %d\n", ret);
 513     return ret;
 514 }
 515
 516 static BOOL WINAPI CRYPT_AsnEncodeOid(DWORD dwCertEncodingType,
 517  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 518  DWORD *pcbEncoded)
 519 {
 520     LPCSTR pszObjId = pvStructInfo;
 521     DWORD bytesNeeded = 0, lenBytes;
 522     BOOL ret = TRUE;
 523     int firstPos = 0;
 524     BYTE firstByte = 0;
 525
 526     TRACE("%s\n", debugstr_a(pszObjId));
 527
 528     if (pszObjId)
 529     {
 530         const char *ptr;
 531         int val1, val2;
 532
 533         if (sscanf(pszObjId, "%d.%d%n", &val1, &val2, &firstPos) != 2)
 534         {
 535             SetLastError(CRYPT_E_ASN1_ERROR);
 536             return FALSE;
 537         }
 538         bytesNeeded++;
 539         firstByte = val1 * 40 + val2;
 540         ptr = pszObjId + firstPos;
 541         if (*ptr == '.')
 542         {
 543             ptr++;
 544             firstPos++;
 545         }
 546         while (ret && *ptr)
 547         {
 548             int pos;
 549
 550             /* note I assume each component is at most 32-bits long in base 2 */
 551             if (sscanf(ptr, "%d%n", &val1, &pos) == 1)
 552             {
 553                 if (val1 >= 0x10000000)
 554                     bytesNeeded += 5;
 555                 else if (val1 >= 0x200000)
 556                     bytesNeeded += 4;
 557                 else if (val1 >= 0x4000)
 558                     bytesNeeded += 3;
 559                 else if (val1 >= 0x80)
 560                     bytesNeeded += 2;
 561                 else
 562                     bytesNeeded += 1;
 563                 ptr += pos;
 564                 if (*ptr == '.')
 565                     ptr++;
 566             }
 567             else
 568             {
 569                 SetLastError(CRYPT_E_ASN1_ERROR);
 570                 return FALSE;
 571             }
 572         }
 573         CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
 574     }
 575     else
 576         lenBytes = 1;
 577     bytesNeeded += 1 + lenBytes;
 578     if (pbEncoded)
 579     {
 580         if (*pcbEncoded < bytesNeeded)
 581         {
 582             SetLastError(ERROR_MORE_DATA);
 583             ret = FALSE;
 584         }
 585         else
 586         {
 587             *pbEncoded++ = ASN_OBJECTIDENTIFIER;
 588             CRYPT_EncodeLen(bytesNeeded - 1 - lenBytes, pbEncoded, &lenBytes);
 589             pbEncoded += lenBytes;
 590             if (pszObjId)
 591             {
 592                 const char *ptr;
 593                 int val, pos;
 594
 595                 *pbEncoded++ = firstByte;
 596                 ptr = pszObjId + firstPos;
 597                 while (ret && *ptr)
 598                 {
 599                     sscanf(ptr, "%d%n", &val, &pos);
 600                     {
 601                         unsigned char outBytes[5];
 602                         int numBytes, i;
 603
 604                         if (val >= 0x10000000)
 605                             numBytes = 5;
 606                         else if (val >= 0x200000)
 607                             numBytes = 4;
 608                         else if (val >= 0x4000)
 609                             numBytes = 3;
 610                         else if (val >= 0x80)
 611                             numBytes = 2;
 612                         else
 613                             numBytes = 1;
 614                         for (i = numBytes; i > 0; i--)
 615                         {
 616                             outBytes[i - 1] = val & 0x7f;
 617                             val >>= 7;
 618                         }
 619                         for (i = 0; i < numBytes - 1; i++)
 620                             *pbEncoded++ = outBytes[i] | 0x80;
 621                         *pbEncoded++ = outBytes[i];
 622                         ptr += pos;
 623                         if (*ptr == '.')
 624                             ptr++;
 625                     }
 626                 }
 627             }
 628         }
 629     }
 630     *pcbEncoded = bytesNeeded;
 631     return ret;
 632 }
 633
 634 static BOOL WINAPI CRYPT_CopyEncodedBlob(DWORD dwCertEncodingType,
 635  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 636  DWORD *pcbEncoded)
 637 {
 638     const CRYPT_DER_BLOB *blob = pvStructInfo;
 639     BOOL ret = TRUE;
 640
 641     if (!pbEncoded)
 642         *pcbEncoded = blob->cbData;
 643     else if (*pcbEncoded < blob->cbData)
 644     {
 645         *pcbEncoded = blob->cbData;
 646         SetLastError(ERROR_MORE_DATA);
 647         ret = FALSE;
 648     }
 649     else
 650     {
 651         if (blob->cbData)
 652             memcpy(pbEncoded, blob->pbData, blob->cbData);
 653         *pcbEncoded = blob->cbData;
 654     }
 655     return ret;
 656 }
 657
 658 static BOOL WINAPI CRYPT_AsnEncodeAlgorithmIdWithNullParams(
 659  DWORD dwCertEncodingType, LPCSTR lpszStructType, const void *pvStructInfo,
 660  BYTE *pbEncoded, DWORD *pcbEncoded)
 661 {
 662     const CRYPT_ALGORITHM_IDENTIFIER *algo = pvStructInfo;
 663     static const BYTE asn1Null[] = { ASN_NULL, 0 };
 664     static const CRYPT_DATA_BLOB nullBlob = { sizeof(asn1Null),
 665      (LPBYTE)asn1Null };
 666     BOOL ret;
 667     struct AsnEncodeSequenceItem items[2] = {
 668      { algo->pszObjId, CRYPT_AsnEncodeOid, 0 },
 669      { NULL,           CRYPT_CopyEncodedBlob, 0 },
 670     };
 671
 672     if (algo->Parameters.cbData)
 673         items[1].pvStructInfo = &algo->Parameters;
 674     else
 675         items[1].pvStructInfo = &nullBlob;
 676     ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
 677      sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
 678     return ret;
 679 }
 680
 681 static BOOL WINAPI CRYPT_AsnEncodeAttributeTypeValue(DWORD dwCertEncodingType,
 682  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 683  DWORD *pcbEncoded)
 684 {
 685     const CRYPT_ATTRIBUTE_TYPE_VALUE *typeValue = pvStructInfo;
 686     struct AsnEncodeSequenceItem items[] = {
 687      { &typeValue->pszObjId, CRYPT_AsnEncodeOid, 0 },
 688      { &typeValue->Value,    CRYPT_CopyEncodedBlob, 0 },
 689     };
 690
 691     return CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
 692      items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
 693 }
 694
 695 struct SPCDigest
 696 {
 697     CRYPT_ALGORITHM_IDENTIFIER DigestAlgorithm;
 698     CRYPT_HASH_BLOB            Digest;
 699 };
 700
 701 static BOOL WINAPI CRYPT_AsnEncodeSPCDigest(DWORD dwCertEncodingType,
 702  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 703  DWORD *pcbEncoded)
 704 {
 705     const struct SPCDigest *digest = pvStructInfo;
 706     struct AsnEncodeSequenceItem items[] = {
 707      { &digest->DigestAlgorithm, CRYPT_AsnEncodeAlgorithmIdWithNullParams, 0 },
 708      { &digest->Digest,          CRYPT_CopyEncodedBlob, 0 },
 709     };
 710
 711     return CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
 712      items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
 713 }
 714
 715 BOOL WINAPI WVTAsn1SpcIndirectDataContentEncode(DWORD dwCertEncodingType,
 716  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 717  DWORD *pcbEncoded)
 718 {
 719     BOOL ret = FALSE;
 720
 721     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
 722      debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
 723
 724     __TRY
 725     {
 726         const SPC_INDIRECT_DATA_CONTENT *data = pvStructInfo;
 727         struct AsnEncodeSequenceItem items[] = {
 728          { &data->Data,            CRYPT_AsnEncodeAttributeTypeValue, 0 },
 729          { &data->DigestAlgorithm, CRYPT_AsnEncodeSPCDigest, 0 },
 730         };
 731
 732         ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
 733          items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
 734     }
 735     __EXCEPT_PAGE_FAULT
 736     {
 737         SetLastError(STATUS_ACCESS_VIOLATION);
 738     }
 739     __ENDTRY
 740     return ret;
 741 }
 742
 743 static BOOL WINAPI CRYPT_AsnEncodeBMPString(DWORD dwCertEncodingType,
 744  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 745  DWORD *pcbEncoded)
 746 {
 747     BOOL ret = TRUE;
 748     LPCWSTR str = pvStructInfo;
 749     DWORD bytesNeeded, lenBytes, strLen;
 750
 751     if (str)
 752         strLen = lstrlenW(str);
 753     else
 754         strLen = 0;
 755     CRYPT_EncodeLen(strLen * 2, NULL, &lenBytes);
 756     bytesNeeded = 1 + lenBytes + strLen * 2;
 757     if (!pbEncoded)
 758         *pcbEncoded = bytesNeeded;
 759     else if (*pcbEncoded < bytesNeeded)
 760     {
 761         *pcbEncoded = bytesNeeded;
 762         SetLastError(ERROR_MORE_DATA);
 763         ret = FALSE;
 764     }
 765     else
 766     {
 767         DWORD i;
 768
 769         *pcbEncoded = bytesNeeded;
 770         *pbEncoded++ = ASN_BMPSTRING;
 771         CRYPT_EncodeLen(strLen * 2, pbEncoded, &lenBytes);
 772         pbEncoded += lenBytes;
 773         for (i = 0; i < strLen; i++)
 774         {
 775             *pbEncoded++ = (str[i] & 0xff00) >> 8;
 776             *pbEncoded++ = str[i] & 0x00ff;
 777         }
 778     }
 779     return ret;
 780 }
 781
 782 struct AsnEncodeTagSwappedItem
 783 {
 784     BYTE                  tag;
 785     const void           *pvStructInfo;
 786     CryptEncodeObjectFunc encodeFunc;
 787 };
 788
 789 /* Sort of a wacky hack, it encodes something using the struct
 790  * AsnEncodeTagSwappedItem's encodeFunc, then replaces the tag byte with the tag
 791  * given in the struct AsnEncodeTagSwappedItem.
 792  */
 793 static BOOL WINAPI CRYPT_AsnEncodeSwapTag(DWORD dwCertEncodingType,
 794  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 795  DWORD *pcbEncoded)
 796 {
 797     BOOL ret;
 798     const struct AsnEncodeTagSwappedItem *item = pvStructInfo;
 799
 800     ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
 801      item->pvStructInfo, pbEncoded, pcbEncoded);
 802     if (ret && pbEncoded)
 803         *pbEncoded = item->tag;
 804     return ret;
 805 }
 806
 807 BOOL WINAPI WVTAsn1SpcSpOpusInfoEncode(DWORD dwCertEncodingType,
 808  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 809  DWORD *pcbEncoded)
 810 {
 811     BOOL ret = FALSE;
 812
 813     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
 814      debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
 815
 816     __TRY
 817     {
 818         const SPC_SP_OPUS_INFO *info = pvStructInfo;
 819
 820         if (info->pMoreInfo &&
 821          info->pMoreInfo->dwLinkChoice != SPC_URL_LINK_CHOICE &&
 822          info->pMoreInfo->dwLinkChoice != SPC_MONIKER_LINK_CHOICE &&
 823          info->pMoreInfo->dwLinkChoice != SPC_FILE_LINK_CHOICE)
 824             SetLastError(E_INVALIDARG);
 825         else if (info->pPublisherInfo &&
 826          info->pPublisherInfo->dwLinkChoice != SPC_URL_LINK_CHOICE &&
 827          info->pPublisherInfo->dwLinkChoice != SPC_MONIKER_LINK_CHOICE &&
 828          info->pPublisherInfo->dwLinkChoice != SPC_FILE_LINK_CHOICE)
 829             SetLastError(E_INVALIDARG);
 830         else
 831         {
 832             struct AsnEncodeSequenceItem items[3] = { { 0 } };
 833             struct AsnConstructedItem constructed[3] = { { 0 } };
 834             struct AsnEncodeTagSwappedItem swapped;
 835             DWORD cItem = 0, cConstructed = 0;
 836
 837             if (info->pwszProgramName)
 838             {
 839                 swapped.tag = ASN_CONTEXT;
 840                 swapped.pvStructInfo = info->pwszProgramName;
 841                 swapped.encodeFunc = CRYPT_AsnEncodeBMPString;
 842                 constructed[cConstructed].tag = 0;
 843                 constructed[cConstructed].pvStructInfo = &swapped;
 844                 constructed[cConstructed].encodeFunc = CRYPT_AsnEncodeSwapTag;
 845                 items[cItem].pvStructInfo = &constructed[cConstructed];
 846                 items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
 847                 cConstructed++;
 848                 cItem++;
 849             }
 850             if (info->pMoreInfo)
 851             {
 852                 constructed[cConstructed].tag = 1;
 853                 constructed[cConstructed].pvStructInfo = info->pMoreInfo;
 854                 constructed[cConstructed].encodeFunc = WVTAsn1SpcLinkEncode;
 855                 items[cItem].pvStructInfo = &constructed[cConstructed];
 856                 items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
 857                 cConstructed++;
 858                 cItem++;
 859             }
 860             if (info->pPublisherInfo)
 861             {
 862                 constructed[cConstructed].tag = 2;
 863                 constructed[cConstructed].pvStructInfo = info->pPublisherInfo;
 864                 constructed[cConstructed].encodeFunc = WVTAsn1SpcLinkEncode;
 865                 items[cItem].pvStructInfo = &constructed[cConstructed];
 866                 items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
 867                 cConstructed++;
 868                 cItem++;
 869             }
 870             ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
 871              items, cItem, pbEncoded, pcbEncoded);
 872         }
 873     }
 874     __EXCEPT_PAGE_FAULT
 875     {
 876         SetLastError(STATUS_ACCESS_VIOLATION);
 877     }
 878     __ENDTRY
 879     return ret;
 880 }
 881
 882 static BOOL CRYPT_AsnEncodeInteger(DWORD dwCertEncodingType,
 883  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 884  DWORD *pcbEncoded)
 885 {
 886     BOOL ret;
 887
 888     __TRY
 889     {
 890         DWORD significantBytes, lenBytes, bytesNeeded;
 891         BYTE padByte = 0;
 892         BOOL pad = FALSE;
 893         const CRYPT_INTEGER_BLOB *blob = pvStructInfo;
 894
 895         significantBytes = blob->cbData;
 896         if (significantBytes)
 897         {
 898             if (blob->pbData[significantBytes - 1] & 0x80)
 899             {
 900                 /* negative, lop off leading (little-endian) 0xffs */
 901                 for (; significantBytes > 0 &&
 902                  blob->pbData[significantBytes - 1] == 0xff; significantBytes--)
 903                     ;
 904                 if (blob->pbData[significantBytes - 1] < 0x80)
 905                 {
 906                     padByte = 0xff;
 907                     pad = TRUE;
 908                 }
 909             }
 910             else
 911             {
 912                 /* positive, lop off leading (little-endian) zeroes */
 913                 for (; significantBytes > 0 &&
 914                  !blob->pbData[significantBytes - 1]; significantBytes--)
 915                     ;
 916                 if (significantBytes == 0)
 917                     significantBytes = 1;
 918                 if (blob->pbData[significantBytes - 1] > 0x7f)
 919                 {
 920                     padByte = 0;
 921                     pad = TRUE;
 922                 }
 923             }
 924         }
 925         if (pad)
 926             CRYPT_EncodeLen(significantBytes + 1, NULL, &lenBytes);
 927         else
 928             CRYPT_EncodeLen(significantBytes, NULL, &lenBytes);
 929         bytesNeeded = 1 + lenBytes + significantBytes;
 930         if (pad)
 931             bytesNeeded++;
 932         if (!pbEncoded)
 933         {
 934             *pcbEncoded = bytesNeeded;
 935             ret = TRUE;
 936         }
 937         else if (*pcbEncoded < bytesNeeded)
 938         {
 939             *pcbEncoded = bytesNeeded;
 940             SetLastError(ERROR_MORE_DATA);
 941             ret = FALSE;
 942         }
 943         else
 944         {
 945             *pcbEncoded = bytesNeeded;
 946             *pbEncoded++ = ASN_INTEGER;
 947             if (pad)
 948             {
 949                 CRYPT_EncodeLen(significantBytes + 1, pbEncoded, &lenBytes);
 950                 pbEncoded += lenBytes;
 951                 *pbEncoded++ = padByte;
 952             }
 953             else
 954             {
 955                 CRYPT_EncodeLen(significantBytes, pbEncoded, &lenBytes);
 956                 pbEncoded += lenBytes;
 957             }
 958             for (; significantBytes > 0; significantBytes--)
 959                 *(pbEncoded++) = blob->pbData[significantBytes - 1];
 960             ret = TRUE;
 961         }
 962     }
 963     __EXCEPT_PAGE_FAULT
 964     {
 965         SetLastError(STATUS_ACCESS_VIOLATION);
 966         ret = FALSE;
 967     }
 968     __ENDTRY
 969     return ret;
 970 }
 971
 972 static BOOL WINAPI CRYPT_AsnEncodeInt(DWORD dwCertEncodingType,
 973  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 974  DWORD *pcbEncoded)
 975 {
 976     CRYPT_INTEGER_BLOB blob = { sizeof(INT), (BYTE *)pvStructInfo };
 977
 978     return CRYPT_AsnEncodeInteger(dwCertEncodingType, X509_MULTI_BYTE_INTEGER,
 979      &blob, pbEncoded, pcbEncoded);
 980 }
 981
 982 BOOL WINAPI WVTAsn1CatMemberInfoEncode(DWORD dwCertEncodingType,
 983  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 984  DWORD *pcbEncoded)
 985 {
 986     BOOL ret = FALSE;
 987
 988     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
 989      debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
 990
 991     __TRY
 992     {
 993         const CAT_MEMBERINFO *info = pvStructInfo;
 994         struct AsnEncodeSequenceItem items[] = {
 995          { info->pwszSubjGuid, CRYPT_AsnEncodeBMPString, 0 },
 996          { &info->dwCertVersion, CRYPT_AsnEncodeInt, 0 },
 997         };
 998
 999         ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
1000          items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
1001     }
1002     __EXCEPT_PAGE_FAULT
1003     {
1004         SetLastError(STATUS_ACCESS_VIOLATION);
1005     }
1006     __ENDTRY
1007     return ret;
1008 }
1009
1010 BOOL WINAPI WVTAsn1CatNameValueEncode(DWORD dwCertEncodingType,
1011  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
1012  DWORD *pcbEncoded)
1013 {
1014     BOOL ret = FALSE;
1015
1016     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
1017      debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
1018
1019     __TRY
1020     {
1021         const CAT_NAMEVALUE *value = pvStructInfo;
1022         struct AsnEncodeSequenceItem items[] = {
1023          { value->pwszTag,   CRYPT_AsnEncodeBMPString, 0 },
1024          { &value->fdwFlags, CRYPT_AsnEncodeInt, 0 },
1025          { &value->Value,    CRYPT_AsnEncodeOctets, 0 },
1026         };
1027
1028         ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
1029          items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
1030     }
1031     __EXCEPT_PAGE_FAULT
1032     {
1033         SetLastError(STATUS_ACCESS_VIOLATION);
1034     }
1035     __ENDTRY
1036     return ret;
1037 }
1038
1039 static BOOL WINAPI CRYPT_AsnEncodeBool(DWORD dwCertEncodingType,
1040  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
1041  DWORD *pcbEncoded)
1042 {
1043     BOOL val = *(const BOOL *)pvStructInfo, ret;
1044
1045     TRACE("%d\n", val);
1046
1047     if (!pbEncoded)
1048     {
1049         *pcbEncoded = 3;
1050         ret = TRUE;
1051     }
1052     else if (*pcbEncoded < 3)
1053     {
1054         *pcbEncoded = 3;
1055         SetLastError(ERROR_MORE_DATA);
1056         ret = FALSE;
1057     }
1058     else
1059     {
1060         *pcbEncoded = 3;
1061         *pbEncoded++ = ASN_BOOL;
1062         *pbEncoded++ = 1;
1063         *pbEncoded++ = val ? 0xff : 0;
1064         ret = TRUE;
1065     }
1066     TRACE("returning %d (%08x)\n", ret, GetLastError());
1067     return ret;
1068 }
1069
1070 BOOL WINAPI WVTAsn1SpcFinancialCriteriaInfoEncode(DWORD dwCertEncodingType,
1071  LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
1072  DWORD *pcbEncoded)
1073 {
1074     BOOL ret = FALSE;
1075
1076     TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
1077      debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
1078
1079     __TRY
1080     {
1081         const SPC_FINANCIAL_CRITERIA *criteria = pvStructInfo;
1082         struct AsnEncodeSequenceItem items[] = {
1083          { &criteria->fFinancialInfoAvailable, CRYPT_AsnEncodeBool, 0 },
1084          { &criteria->fMeetsCriteria,          CRYPT_AsnEncodeBool, 0 },
1085         };
1086
1087         ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
1088          items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
1089     }
1090     __EXCEPT_PAGE_FAULT
1091     {
1092         SetLastError(STATUS_ACCESS_VIOLATION);
1093     }
1094     __ENDTRY
1095     return ret;
1096 }
1097
1098 /* Gets the number of length bytes from the given (leading) length byte */
1099 #define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))
1100
1101 /* Helper function to get the encoded length of the data starting at pbEncoded,
1102  * where pbEncoded[0] is the tag.  If the data are too short to contain a
1103  * length or if the length is too large for cbEncoded, sets an appropriate
1104  * error code and returns FALSE.
1105  */
1106 static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
1107 {
1108     BOOL ret;
1109
1110     if (cbEncoded <= 1)
1111     {
1112         SetLastError(CRYPT_E_ASN1_CORRUPT);
1113         ret = FALSE;
1114     }
1115     else if (pbEncoded[1] <= 0x7f)
1116     {
1117         if (pbEncoded[1] + 1 > cbEncoded)
1118         {
1119             SetLastError(CRYPT_E_ASN1_EOD);
1120             ret = FALSE;
1121         }
1122         else
1123         {
1124             *len = pbEncoded[1];
1125             ret = TRUE;
1126         }
1127     }
1128     else if (pbEncoded[1] == 0x80)
1129     {
1130         FIXME("unimplemented for indefinite-length encoding\n");
1131         SetLastError(CRYPT_E_ASN1_CORRUPT);
1132         ret = FALSE;
1133     }
1134     else
1135     {
1136         BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
1137
1138         if (lenLen > sizeof(DWORD) + 1)
1139         {
1140             SetLastError(CRYPT_E_ASN1_LARGE);
1141             ret = FALSE;
1142         }
1143         else if (lenLen + 2 > cbEncoded)
1144         {
1145             SetLastError(CRYPT_E_ASN1_CORRUPT);
1146             ret = FALSE;
1147         }
1148         else
1149         {
1150             DWORD out = 0;
1151
1152             pbEncoded += 2;
1153             while (--lenLen)
1154             {
1155                 out <<= 8;
1156                 out |= *pbEncoded++;
1157             }
1158             if (out + lenLen + 1 > cbEncoded)
1159             {
1160                 SetLastError(CRYPT_E_ASN1_EOD);
1161                 ret = FALSE;
1162             }
1163             else
1164             {
1165                 *len = out;
1166                 ret = TRUE;
1167             }
1168         }
1169     }
1170     return ret;
1171 }
1172
1173 static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
1174  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1175  void *pvStructInfo, DWORD *pcbStructInfo)
1176 {
1177     BOOL ret;
1178     DWORD bytesNeeded, dataLen;
1179
1180     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1181      pvStructInfo, *pcbStructInfo);
1182
1183     if (!cbEncoded)
1184     {
1185         SetLastError(CRYPT_E_ASN1_CORRUPT);
1186         ret = FALSE;
1187     }
1188     else if (pbEncoded[0] != ASN_OCTETSTRING)
1189     {
1190         SetLastError(CRYPT_E_ASN1_BADTAG);
1191         ret = FALSE;
1192     }
1193     else if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1194     {
1195         if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1196             bytesNeeded = sizeof(CRYPT_DATA_BLOB);
1197         else
1198             bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
1199         if (!pvStructInfo)
1200             *pcbStructInfo = bytesNeeded;
1201         else if (*pcbStructInfo < bytesNeeded)
1202         {
1203             SetLastError(ERROR_MORE_DATA);
1204             *pcbStructInfo = bytesNeeded;
1205             ret = FALSE;
1206         }
1207         else
1208         {
1209             CRYPT_DATA_BLOB *blob;
1210             BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1211
1212             blob = pvStructInfo;
1213             blob->cbData = dataLen;
1214             if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1215                 blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
1216             else
1217             {
1218                 assert(blob->pbData);
1219                 if (blob->cbData)
1220                     memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
1221                      blob->cbData);
1222             }
1223         }
1224     }
1225     return ret;
1226 }
1227
1228 static BOOL CRYPT_AsnDecodeSPCLinkInternal(DWORD dwCertEncodingType,
1229  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1230  void *pvStructInfo, DWORD *pcbStructInfo)
1231 {
1232     BOOL ret = FALSE;
1233     DWORD bytesNeeded = sizeof(SPC_LINK), dataLen;
1234
1235     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1236      pvStructInfo, *pcbStructInfo);
1237
1238     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1239     {
1240         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1241         DWORD realDataLen;
1242
1243         switch (pbEncoded[0])
1244         {
1245         case ASN_CONTEXT:
1246             bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
1247             if (!pvStructInfo)
1248                 *pcbStructInfo = bytesNeeded;
1249             else if (*pcbStructInfo < bytesNeeded)
1250             {
1251                 *pcbStructInfo = bytesNeeded;
1252                 SetLastError(ERROR_MORE_DATA);
1253                 ret = FALSE;
1254             }
1255             else
1256             {
1257                 PSPC_LINK link = pvStructInfo;
1258                 DWORD i;
1259
1260                 link->dwLinkChoice = SPC_URL_LINK_CHOICE;
1261                 for (i = 0; i < dataLen; i++)
1262                     link->u.pwszUrl[i] =
1263                      *(pbEncoded + 1 + lenBytes + i);
1264                 link->u.pwszUrl[i] = '\0';
1265                 TRACE("returning url %s\n", debugstr_w(link->u.pwszUrl));
1266             }
1267             break;
1268         case ASN_CONSTRUCTOR | ASN_CONTEXT | 1:
1269         {
1270             CRYPT_DATA_BLOB classId;
1271             DWORD size = sizeof(classId);
1272
1273             if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
1274              pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
1275              CRYPT_DECODE_NOCOPY_FLAG, &classId, &size)))
1276             {
1277                 if (classId.cbData != sizeof(SPC_UUID))
1278                 {
1279                     SetLastError(CRYPT_E_BAD_ENCODE);
1280                     ret = FALSE;
1281                 }
1282                 else
1283                 {
1284                     CRYPT_DATA_BLOB data;
1285
1286                     /* The tag length for the classId must be 1 since the
1287                      * length is correct.
1288                      */
1289                     size = sizeof(data);
1290                     if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
1291                      pbEncoded + 3 + lenBytes + classId.cbData,
1292                      cbEncoded - 3 - lenBytes - classId.cbData,
1293                      CRYPT_DECODE_NOCOPY_FLAG, &data, &size)))
1294                     {
1295                         bytesNeeded += data.cbData;
1296                         if (!pvStructInfo)
1297                             *pcbStructInfo = bytesNeeded;
1298                         else if (*pcbStructInfo < bytesNeeded)
1299                         {
1300                             *pcbStructInfo = bytesNeeded;
1301                             SetLastError(ERROR_MORE_DATA);
1302                             ret = FALSE;
1303                         }
1304                         else
1305                         {
1306                             PSPC_LINK link = pvStructInfo;
1307
1308                             link->dwLinkChoice = SPC_MONIKER_LINK_CHOICE;
1309                             /* pwszFile pointer was set by caller, copy it
1310                              * before overwriting it
1311                              */
1312                             link->u.Moniker.SerializedData.pbData =
1313                              (BYTE *)link->u.pwszFile;
1314                             memcpy(link->u.Moniker.ClassId, classId.pbData,
1315                              classId.cbData);
1316                             memcpy(link->u.Moniker.SerializedData.pbData,
1317                              data.pbData, data.cbData);
1318                             link->u.Moniker.SerializedData.cbData = data.cbData;
1319                         }
1320                     }
1321                 }
1322             }
1323             break;
1324         }
1325         case ASN_CONSTRUCTOR | ASN_CONTEXT | 2:
1326             if (dataLen && pbEncoded[1 + lenBytes] != ASN_CONTEXT)
1327                 SetLastError(CRYPT_E_ASN1_BADTAG);
1328             else if ((ret = CRYPT_GetLen(pbEncoded + 1 + lenBytes, dataLen,
1329              &realDataLen)))
1330             {
1331                 BYTE realLenBytes = GET_LEN_BYTES(pbEncoded[2 + lenBytes]);
1332
1333                 bytesNeeded += realDataLen + sizeof(WCHAR);
1334                 if (!pvStructInfo)
1335                     *pcbStructInfo = bytesNeeded;
1336                 else if (*pcbStructInfo < bytesNeeded)
1337                 {
1338                     *pcbStructInfo = bytesNeeded;
1339                     SetLastError(ERROR_MORE_DATA);
1340                     ret = FALSE;
1341                 }
1342                 else
1343                 {
1344                     PSPC_LINK link = pvStructInfo;
1345                     DWORD i;
1346                     const BYTE *ptr = pbEncoded + 2 + lenBytes + realLenBytes;
1347
1348                     link->dwLinkChoice = SPC_FILE_LINK_CHOICE;
1349                     for (i = 0; i < dataLen / sizeof(WCHAR); i++)
1350                         link->u.pwszFile[i] =
1351                          hton16(*(const WORD *)(ptr + i * sizeof(WCHAR)));
1352                     link->u.pwszFile[realDataLen / sizeof(WCHAR)] = '\0';
1353                     TRACE("returning file %s\n", debugstr_w(link->u.pwszFile));
1354                 }
1355             }
1356             else
1357             {
1358                 bytesNeeded += sizeof(WCHAR);
1359                 if (!pvStructInfo)
1360                     *pcbStructInfo = bytesNeeded;
1361                 else if (*pcbStructInfo < bytesNeeded)
1362                 {
1363                     *pcbStructInfo = bytesNeeded;
1364                     SetLastError(ERROR_MORE_DATA);
1365                     ret = FALSE;
1366                 }
1367                 else
1368                 {
1369                     PSPC_LINK link = pvStructInfo;
1370
1371                     link->dwLinkChoice = SPC_FILE_LINK_CHOICE;
1372                     link->u.pwszFile[0] = '\0';
1373                     ret = TRUE;
1374                 }
1375             }
1376             break;
1377         default:
1378             SetLastError(CRYPT_E_ASN1_BADTAG);
1379         }
1380     }
1381     TRACE("returning %d\n", ret);
1382     return ret;
1383 }
1384
1385 BOOL WINAPI WVTAsn1SpcLinkDecode(DWORD dwCertEncodingType,
1386  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1387  void *pvStructInfo, DWORD *pcbStructInfo)
1388 {
1389     BOOL ret = FALSE;
1390
1391     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1392      pvStructInfo, *pcbStructInfo);
1393
1394     __TRY
1395     {
1396         DWORD bytesNeeded;
1397
1398         ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
1399          lpszStructType, pbEncoded, cbEncoded, dwFlags, NULL, &bytesNeeded);
1400         if (ret)
1401         {
1402             if (!pvStructInfo)
1403                 *pcbStructInfo = bytesNeeded;
1404             else if (*pcbStructInfo < bytesNeeded)
1405             {
1406                 *pcbStructInfo = bytesNeeded;
1407                 SetLastError(ERROR_MORE_DATA);
1408                 ret = FALSE;
1409             }
1410             else
1411             {
1412                 SPC_LINK *link = pvStructInfo;
1413
1414                 link->u.pwszFile =
1415                  (LPWSTR)((BYTE *)pvStructInfo + sizeof(SPC_LINK));
1416                 ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
1417                  lpszStructType, pbEncoded, cbEncoded, dwFlags, pvStructInfo,
1418                  pcbStructInfo);
1419             }
1420         }
1421     }
1422     __EXCEPT_PAGE_FAULT
1423     {
1424         SetLastError(STATUS_ACCESS_VIOLATION);
1425     }
1426     __ENDTRY
1427     TRACE("returning %d\n", ret);
1428     return ret;
1429 }
1430
1431 typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
1432  DWORD, DWORD, void *, DWORD *);
1433
1434 /* tag:
1435  *     The expected tag of the item.  If tag is 0, decodeFunc is called
1436  *     regardless of the tag value seen.
1437  * offset:
1438  *     A sequence is decoded into a struct.  The offset member is the
1439  *     offset of this item within that struct.
1440  * decodeFunc:
1441  *     The decoder function to use.  If this is NULL, then the member isn't
1442  *     decoded, but minSize space is reserved for it.
1443  * minSize:
1444  *     The minimum amount of space occupied after decoding.  You must set this.
1445  * optional:
1446  *     If true, and the tag doesn't match the expected tag for this item,
1447  *     or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
1448  *     filled with 0 for this member.
1449  * hasPointer, pointerOffset:
1450  *     If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
1451  *     the offset within the struct of the data pointer (or to the
1452  *     first data pointer, if more than one exist).
1453  * size:
1454  *     Used by CRYPT_AsnDecodeSequence, not for your use.
1455  */
1456 struct AsnDecodeSequenceItem
1457 {
1458     BYTE                  tag;
1459     DWORD                 offset;
1460     CryptDecodeObjectFunc decodeFunc;
1461     DWORD                 minSize;
1462     BOOL                  optional;
1463     BOOL                  hasPointer;
1464     DWORD                 pointerOffset;
1465     DWORD                 size;
1466 };
1467
1468 /* Align up to a DWORD_PTR boundary
1469  */
1470 #define ALIGN_DWORD_PTR(x) (((x) + sizeof(DWORD_PTR) - 1) & ~(sizeof(DWORD_PTR) - 1))
1471
1472 #define FINALMEMBERSIZE(s, member) (sizeof(s) - offsetof(s, member))
1473 #define MEMBERSIZE(s, member, nextmember) \
1474     (offsetof(s, nextmember) - offsetof(s, member))
1475
1476
1477 /* Decodes the items in a sequence, where the items are described in items,
1478  * the encoded data are in pbEncoded with length cbEncoded.  Decodes into
1479  * pvStructInfo.  nextData is a pointer to the memory location at which the
1480  * first decoded item with a dynamic pointer should point.
1481  * Upon decoding, *cbDecoded is the total number of bytes decoded.
1482  */
1483 static BOOL CRYPT_AsnDecodeSequenceItems(DWORD dwCertEncodingType,
1484  struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
1485  DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, BYTE *nextData,
1486  DWORD *cbDecoded)
1487 {
1488     BOOL ret;
1489     DWORD i, decoded = 0;
1490     const BYTE *ptr = pbEncoded;
1491
1492     TRACE("%p, %d, %p, %d, %08x, %p, %p, %p\n", items, cItem, pbEncoded,
1493      cbEncoded, dwFlags, pvStructInfo, nextData, cbDecoded);
1494
1495     for (i = 0, ret = TRUE; ret && i < cItem; i++)
1496     {
1497         if (cbEncoded - (ptr - pbEncoded) != 0)
1498         {
1499             DWORD nextItemLen;
1500
1501             if ((ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
1502              &nextItemLen)))
1503             {
1504                 BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);
1505
1506                 if (ptr[0] == items[i].tag || !items[i].tag)
1507                 {
1508                     if (nextData && pvStructInfo && items[i].hasPointer)
1509                     {
1510                         TRACE("Setting next pointer to %p\n",
1511                          nextData);
1512                         *(BYTE **)((BYTE *)pvStructInfo +
1513                          items[i].pointerOffset) = nextData;
1514                     }
1515                     if (items[i].decodeFunc)
1516                     {
1517                         if (pvStructInfo)
1518                             TRACE("decoding item %d\n", i);
1519                         else
1520                             TRACE("sizing item %d\n", i);
1521                         ret = items[i].decodeFunc(dwCertEncodingType,
1522                          NULL, ptr, 1 + nextItemLenBytes + nextItemLen,
1523                          dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
1524                          pvStructInfo ?  (BYTE *)pvStructInfo + items[i].offset
1525                          : NULL, &items[i].size);
1526                         if (ret)
1527                         {
1528                             if (items[i].size < items[i].minSize)
1529                                 items[i].size = items[i].minSize;
1530                             else if (items[i].size > items[i].minSize)
1531                             {
1532                                 /* Account for alignment padding */
1533                                 items[i].size = ALIGN_DWORD_PTR(items[i].size);
1534                             }
1535                             TRACE("item %d size: %d\n", i, items[i].size);
1536                             if (nextData && items[i].hasPointer &&
1537                              items[i].size > items[i].minSize)
1538                                 nextData += items[i].size - items[i].minSize;
1539                             ptr += 1 + nextItemLenBytes + nextItemLen;
1540                             decoded += 1 + nextItemLenBytes + nextItemLen;
1541                             TRACE("item %d: decoded %d bytes\n", i,
1542                              1 + nextItemLenBytes + nextItemLen);
1543                         }
1544                         else if (items[i].optional &&
1545                          GetLastError() == CRYPT_E_ASN1_BADTAG)
1546                         {
1547                             TRACE("skipping optional item %d\n", i);
1548                             items[i].size = items[i].minSize;
1549                             SetLastError(NOERROR);
1550                             ret = TRUE;
1551                         }
1552                         else
1553                             TRACE("item %d failed: %08x\n", i,
1554                              GetLastError());
1555                     }
1556                     else
1557                     {
1558                         TRACE("item %d: decoded %d bytes\n", i,
1559                          1 + nextItemLenBytes + nextItemLen);
1560                         ptr += 1 + nextItemLenBytes + nextItemLen;
1561                         decoded += 1 + nextItemLenBytes + nextItemLen;
1562                         items[i].size = items[i].minSize;
1563                     }
1564                 }
1565                 else if (items[i].optional)
1566                 {
1567                     TRACE("skipping optional item %d\n", i);
1568                     items[i].size = items[i].minSize;
1569                 }
1570                 else
1571                 {
1572                     TRACE("item %d: tag %02x doesn't match expected %02x\n",
1573                      i, ptr[0], items[i].tag);
1574                     SetLastError(CRYPT_E_ASN1_BADTAG);
1575                     ret = FALSE;
1576                 }
1577             }
1578         }
1579         else if (items[i].optional)
1580         {
1581             TRACE("missing optional item %d, skipping\n", i);
1582             items[i].size = items[i].minSize;
1583         }
1584         else
1585         {
1586             TRACE("not enough bytes for item %d, failing\n", i);
1587             SetLastError(CRYPT_E_ASN1_CORRUPT);
1588             ret = FALSE;
1589         }
1590     }
1591     if (ret)
1592         *cbDecoded = decoded;
1593     TRACE("returning %d\n", ret);
1594     return ret;
1595 }
1596
1597 /* This decodes an arbitrary sequence into a contiguous block of memory
1598  * (basically, a struct.)  Each element being decoded is described by a struct
1599  * AsnDecodeSequenceItem, see above.
1600  * startingPointer is an optional pointer to the first place where dynamic
1601  * data will be stored.  If you know the starting offset, you may pass it
1602  * here.  Otherwise, pass NULL, and one will be inferred from the items.
1603  */
1604 static BOOL CRYPT_AsnDecodeSequence(DWORD dwCertEncodingType,
1605  struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
1606  DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
1607  void *startingPointer)
1608 {
1609     BOOL ret;
1610
1611     TRACE("%p, %d, %p, %d, %08x, %p, %d, %p\n", items, cItem, pbEncoded,
1612      cbEncoded, dwFlags, pvStructInfo, *pcbStructInfo, startingPointer);
1613
1614     if (pbEncoded[0] == ASN_SEQUENCE)
1615     {
1616         DWORD dataLen;
1617
1618         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1619         {
1620             DWORD lenBytes = GET_LEN_BYTES(pbEncoded[1]), cbDecoded;
1621             const BYTE *ptr = pbEncoded + 1 + lenBytes;
1622
1623             cbEncoded -= 1 + lenBytes;
1624             if (cbEncoded < dataLen)
1625             {
1626                 TRACE("dataLen %d exceeds cbEncoded %d, failing\n", dataLen,
1627                  cbEncoded);
1628                 SetLastError(CRYPT_E_ASN1_CORRUPT);
1629                 ret = FALSE;
1630             }
1631             else
1632                 ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem, ptr,
1633                  cbEncoded, dwFlags, NULL, NULL, &cbDecoded);
1634             if (ret && cbDecoded != dataLen)
1635             {
1636                 TRACE("expected %d decoded, got %d, failing\n", dataLen,
1637                  cbDecoded);
1638                 SetLastError(CRYPT_E_ASN1_CORRUPT);
1639                 ret = FALSE;
1640             }
1641             if (ret)
1642             {
1643                 DWORD i, bytesNeeded = 0, structSize = 0;
1644
1645                 for (i = 0; i < cItem; i++)
1646                 {
1647                     bytesNeeded += items[i].size;
1648                     structSize += items[i].minSize;
1649                 }
1650                 if (!pvStructInfo)
1651                     *pcbStructInfo = bytesNeeded;
1652                 else if (*pcbStructInfo < bytesNeeded)
1653                 {
1654                     SetLastError(ERROR_MORE_DATA);
1655                     *pcbStructInfo = bytesNeeded;
1656                     ret = FALSE;
1657                 }
1658                 else
1659                 {
1660                     BYTE *nextData;
1661
1662                     *pcbStructInfo = bytesNeeded;
1663                     if (startingPointer)
1664                         nextData = startingPointer;
1665                     else
1666                         nextData = (BYTE *)pvStructInfo + structSize;
1667                     memset(pvStructInfo, 0, structSize);
1668                     ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem,
1669                      ptr, cbEncoded, dwFlags, pvStructInfo, nextData,
1670                      &cbDecoded);
1671                 }
1672             }
1673         }
1674     }
1675     else
1676     {
1677         SetLastError(CRYPT_E_ASN1_BADTAG);
1678         ret = FALSE;
1679     }
1680     TRACE("returning %d (%08x)\n", ret, GetLastError());
1681     return ret;
1682 }
1683
1684 static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
1685  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1686  void *pvStructInfo, DWORD *pcbStructInfo)
1687 {
1688     BOOL ret;
1689
1690     TRACE("(%p, %d, 0x%08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
1691      pvStructInfo, *pcbStructInfo);
1692
1693     if (pbEncoded[0] == ASN_BITSTRING)
1694     {
1695         DWORD bytesNeeded, dataLen;
1696
1697         if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1698         {
1699             if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1700                 bytesNeeded = sizeof(CRYPT_BIT_BLOB);
1701             else
1702                 bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
1703             if (!pvStructInfo)
1704                 *pcbStructInfo = bytesNeeded;
1705             else if (*pcbStructInfo < bytesNeeded)
1706             {
1707                 *pcbStructInfo = bytesNeeded;
1708                 SetLastError(ERROR_MORE_DATA);
1709                 ret = FALSE;
1710             }
1711             else
1712             {
1713                 CRYPT_BIT_BLOB *blob;
1714
1715                 blob = pvStructInfo;
1716                 blob->cbData = dataLen - 1;
1717                 blob->cUnusedBits = *(pbEncoded + 1 +
1718                  GET_LEN_BYTES(pbEncoded[1]));
1719                 if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1720                 {
1721                     blob->pbData = (BYTE *)pbEncoded + 2 +
1722                      GET_LEN_BYTES(pbEncoded[1]);
1723                 }
1724                 else
1725                 {
1726                     assert(blob->pbData);
1727                     if (blob->cbData)
1728                     {
1729                         BYTE mask = 0xff << blob->cUnusedBits;
1730
1731                         memcpy(blob->pbData, pbEncoded + 2 +
1732                          GET_LEN_BYTES(pbEncoded[1]), blob->cbData);
1733                         blob->pbData[blob->cbData - 1] &= mask;
1734                     }
1735                 }
1736             }
1737         }
1738     }
1739     else
1740     {
1741         SetLastError(CRYPT_E_ASN1_BADTAG);
1742         ret = FALSE;
1743     }
1744     TRACE("returning %d (%08x)\n", ret, GetLastError());
1745     return ret;
1746 }
1747
1748 static BOOL WINAPI CRYPT_AsnDecodeSPCLinkPointer(DWORD dwCertEncodingType,
1749  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1750  void *pvStructInfo, DWORD *pcbStructInfo)
1751 {
1752     BOOL ret = FALSE;
1753     DWORD dataLen;
1754
1755     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1756     {
1757         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1758         DWORD size;
1759         SPC_LINK **pLink = pvStructInfo;
1760
1761         ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType, lpszStructType,
1762          pbEncoded + 1 + lenBytes, dataLen, dwFlags, NULL, &size);
1763         if (ret)
1764         {
1765             if (!pvStructInfo)
1766                 *pcbStructInfo = size + sizeof(PSPC_LINK);
1767             else if (*pcbStructInfo < size + sizeof(PSPC_LINK))
1768             {
1769                 *pcbStructInfo = size + sizeof(PSPC_LINK);
1770                 SetLastError(ERROR_MORE_DATA);
1771                 ret = FALSE;
1772             }
1773             else
1774             {
1775                 *pcbStructInfo = size + sizeof(PSPC_LINK);
1776                 /* Set imageData's pointer if necessary */
1777                 if (size > sizeof(SPC_LINK))
1778                 {
1779                     (*pLink)->u.pwszUrl =
1780                      (LPWSTR)((BYTE *)*pLink + sizeof(SPC_LINK));
1781                 }
1782                 ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
1783                  lpszStructType, pbEncoded + 1 + lenBytes, dataLen, dwFlags,
1784                  *pLink, pcbStructInfo);
1785             }
1786         }
1787     }
1788     return ret;
1789 }
1790
1791 BOOL WINAPI WVTAsn1SpcPeImageDataDecode(DWORD dwCertEncodingType,
1792  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1793  void *pvStructInfo, DWORD *pcbStructInfo)
1794 {
1795     BOOL ret = FALSE;
1796
1797     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1798      pvStructInfo, *pcbStructInfo);
1799
1800     __TRY
1801     {
1802         struct AsnDecodeSequenceItem items[] = {
1803          { ASN_BITSTRING, offsetof(SPC_PE_IMAGE_DATA, Flags),
1804            CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
1805            offsetof(SPC_PE_IMAGE_DATA, Flags.pbData), 0 },
1806          { ASN_CONSTRUCTOR | ASN_CONTEXT, offsetof(SPC_PE_IMAGE_DATA, pFile),
1807            CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
1808            offsetof(SPC_PE_IMAGE_DATA, pFile), 0 },
1809         };
1810
1811         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
1812          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
1813          pvStructInfo, pcbStructInfo, NULL);
1814     }
1815     __EXCEPT_PAGE_FAULT
1816     {
1817         SetLastError(STATUS_ACCESS_VIOLATION);
1818     }
1819     __ENDTRY
1820     TRACE("returning %d\n", ret);
1821     return ret;
1822 }
1823
1824 static BOOL WINAPI CRYPT_AsnDecodeOidIgnoreTag(DWORD dwCertEncodingType,
1825  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1826  void *pvStructInfo, DWORD *pcbStructInfo)
1827 {
1828     BOOL ret = TRUE;
1829     DWORD dataLen;
1830
1831     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1832      pvStructInfo, *pcbStructInfo);
1833
1834     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
1835     {
1836         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
1837         DWORD bytesNeeded = sizeof(LPSTR);
1838
1839         if (dataLen)
1840         {
1841             /* The largest possible string for the first two components
1842              * is 2.175 (= 2 * 40 + 175 = 255), so this is big enough.
1843              */
1844             char firstTwo[6];
1845             const BYTE *ptr;
1846
1847             snprintf(firstTwo, sizeof(firstTwo), "%d.%d",
1848              pbEncoded[1 + lenBytes] / 40,
1849              pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
1850              * 40);
1851             bytesNeeded += strlen(firstTwo) + 1;
1852             for (ptr = pbEncoded + 2 + lenBytes; ret &&
1853              ptr - pbEncoded - 1 - lenBytes < dataLen; )
1854             {
1855                 /* large enough for ".4000000" */
1856                 char str[9];
1857                 int val = 0;
1858
1859                 while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1860                  (*ptr & 0x80))
1861                 {
1862                     val <<= 7;
1863                     val |= *ptr & 0x7f;
1864                     ptr++;
1865                 }
1866                 if (ptr - pbEncoded - 1 - lenBytes >= dataLen ||
1867                  (*ptr & 0x80))
1868                 {
1869                     SetLastError(CRYPT_E_ASN1_CORRUPT);
1870                     ret = FALSE;
1871                 }
1872                 else
1873                 {
1874                     val <<= 7;
1875                     val |= *ptr++;
1876                     snprintf(str, sizeof(str), ".%d", val);
1877                     bytesNeeded += strlen(str);
1878                 }
1879             }
1880         }
1881         if (!pvStructInfo)
1882             *pcbStructInfo = bytesNeeded;
1883         else if (*pcbStructInfo < bytesNeeded)
1884         {
1885             *pcbStructInfo = bytesNeeded;
1886             SetLastError(ERROR_MORE_DATA);
1887             ret = FALSE;
1888         }
1889         else
1890         {
1891             if (dataLen)
1892             {
1893                 const BYTE *ptr;
1894                 LPSTR pszObjId = *(LPSTR *)pvStructInfo;
1895
1896                 *pszObjId = 0;
1897                 sprintf(pszObjId, "%d.%d", pbEncoded[1 + lenBytes] / 40,
1898                  pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] /
1899                  40) * 40);
1900                 pszObjId += strlen(pszObjId);
1901                 for (ptr = pbEncoded + 2 + lenBytes; ret &&
1902                  ptr - pbEncoded - 1 - lenBytes < dataLen; )
1903                 {
1904                     int val = 0;
1905
1906                     while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
1907                      (*ptr & 0x80))
1908                     {
1909                         val <<= 7;
1910                         val |= *ptr & 0x7f;
1911                         ptr++;
1912                     }
1913                     val <<= 7;
1914                     val |= *ptr++;
1915                     sprintf(pszObjId, ".%d", val);
1916                     pszObjId += strlen(pszObjId);
1917                 }
1918             }
1919             else
1920                 *(LPSTR *)pvStructInfo = NULL;
1921             *pcbStructInfo = bytesNeeded;
1922         }
1923     }
1924     return ret;
1925 }
1926
1927 static BOOL WINAPI CRYPT_AsnDecodeOid(DWORD dwCertEncodingType,
1928  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1929  void *pvStructInfo, DWORD *pcbStructInfo)
1930 {
1931     BOOL ret = FALSE;
1932
1933     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1934      pvStructInfo, *pcbStructInfo);
1935
1936     if (!cbEncoded)
1937         SetLastError(CRYPT_E_ASN1_CORRUPT);
1938     else if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
1939         ret = CRYPT_AsnDecodeOidIgnoreTag(dwCertEncodingType, lpszStructType,
1940          pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
1941     else
1942         SetLastError(CRYPT_E_ASN1_BADTAG);
1943     return ret;
1944 }
1945
1946 static BOOL WINAPI CRYPT_AsnDecodeCopyBytes(DWORD dwCertEncodingType,
1947  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1948  void *pvStructInfo, DWORD *pcbStructInfo)
1949 {
1950     BOOL ret = TRUE;
1951     DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB);
1952
1953     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1954      pvStructInfo, *pcbStructInfo);
1955
1956     if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
1957         bytesNeeded += cbEncoded;
1958     if (!pvStructInfo)
1959         *pcbStructInfo = bytesNeeded;
1960     else if (*pcbStructInfo < bytesNeeded)
1961     {
1962         SetLastError(ERROR_MORE_DATA);
1963         *pcbStructInfo = bytesNeeded;
1964         ret = FALSE;
1965     }
1966     else
1967     {
1968         PCRYPT_OBJID_BLOB blob = pvStructInfo;
1969
1970         *pcbStructInfo = bytesNeeded;
1971         blob->cbData = cbEncoded;
1972         if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
1973             blob->pbData = (LPBYTE)pbEncoded;
1974         else
1975         {
1976             assert(blob->pbData);
1977             memcpy(blob->pbData, pbEncoded, blob->cbData);
1978         }
1979     }
1980     return ret;
1981 }
1982
1983 static BOOL WINAPI CRYPT_AsnDecodeAttributeTypeValue(DWORD dwCertEncodingType,
1984  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
1985  void *pvStructInfo, DWORD *pcbStructInfo)
1986 {
1987     CRYPT_ATTRIBUTE_TYPE_VALUE *typeValue = pvStructInfo;
1988     struct AsnDecodeSequenceItem items[] = {
1989      { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, pszObjId),
1990        CRYPT_AsnDecodeOid, sizeof(LPSTR), FALSE, TRUE,
1991        offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, pszObjId), 0 },
1992      { 0, offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, Value),
1993        CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_DATA_BLOB), TRUE, TRUE,
1994        offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, Value.pbData), 0 },
1995     };
1996
1997     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
1998      pvStructInfo, *pcbStructInfo);
1999
2000     return CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2001      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2002      pvStructInfo, pcbStructInfo,
2003      typeValue ? typeValue->pszObjId : NULL);
2004 }
2005
2006 static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
2007  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2008  void *pvStructInfo, DWORD *pcbStructInfo)
2009 {
2010     CRYPT_ALGORITHM_IDENTIFIER *algo = pvStructInfo;
2011     BOOL ret = TRUE;
2012     struct AsnDecodeSequenceItem items[] = {
2013      { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId),
2014        CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
2015        offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId), 0 },
2016      { 0, offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters),
2017        CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
2018        offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters.pbData), 0 },
2019     };
2020
2021     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2022      pvStructInfo, *pcbStructInfo);
2023
2024     ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2025      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2026      pvStructInfo, pcbStructInfo, algo ? algo->pszObjId : NULL);
2027     if (ret && pvStructInfo)
2028     {
2029         TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
2030          debugstr_a(algo->pszObjId));
2031     }
2032     return ret;
2033 }
2034
2035 static BOOL WINAPI CRYPT_AsnDecodeSPCDigest(DWORD dwCertEncodingType,
2036  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2037  void *pvStructInfo, DWORD *pcbStructInfo)
2038 {
2039     struct SPCDigest *digest = pvStructInfo;
2040     struct AsnDecodeSequenceItem items[] = {
2041      { ASN_SEQUENCEOF, offsetof(struct SPCDigest, DigestAlgorithm),
2042        CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
2043        FALSE, TRUE,
2044        offsetof(struct SPCDigest, DigestAlgorithm.pszObjId), 0 },
2045      { ASN_OCTETSTRING, offsetof(struct SPCDigest, Digest),
2046        CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB),
2047        FALSE, TRUE, offsetof(struct SPCDigest, Digest.pbData), 0 },
2048     };
2049
2050     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2051      pvStructInfo, *pcbStructInfo);
2052
2053     return CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2054      sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2055      pvStructInfo, pcbStructInfo,
2056      digest ? digest->DigestAlgorithm.pszObjId : NULL);
2057 }
2058
2059 BOOL WINAPI WVTAsn1SpcIndirectDataContentDecode(DWORD dwCertEncodingType,
2060  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2061  void *pvStructInfo, DWORD *pcbStructInfo)
2062 {
2063     BOOL ret = FALSE;
2064
2065     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2066      pvStructInfo, *pcbStructInfo);
2067
2068     __TRY
2069     {
2070         struct AsnDecodeSequenceItem items[] = {
2071          { ASN_SEQUENCEOF, offsetof(SPC_INDIRECT_DATA_CONTENT, Data),
2072            CRYPT_AsnDecodeAttributeTypeValue,
2073            sizeof(CRYPT_ATTRIBUTE_TYPE_VALUE), FALSE, TRUE,
2074            offsetof(SPC_INDIRECT_DATA_CONTENT, Data.pszObjId), 0 },
2075          { ASN_SEQUENCEOF, offsetof(SPC_INDIRECT_DATA_CONTENT, DigestAlgorithm),
2076            CRYPT_AsnDecodeSPCDigest, sizeof(struct SPCDigest),
2077            FALSE, TRUE,
2078            offsetof(SPC_INDIRECT_DATA_CONTENT, DigestAlgorithm.pszObjId), 0 },
2079         };
2080
2081         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2082          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2083          pvStructInfo, pcbStructInfo, NULL);
2084     }
2085     __EXCEPT_PAGE_FAULT
2086     {
2087         SetLastError(STATUS_ACCESS_VIOLATION);
2088     }
2089     __ENDTRY
2090     TRACE("returning %d\n", ret);
2091     return ret;
2092 }
2093
2094 static BOOL WINAPI CRYPT_AsnDecodeBMPString(DWORD dwCertEncodingType,
2095  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2096  void *pvStructInfo, DWORD *pcbStructInfo)
2097 {
2098     BOOL ret;
2099     DWORD bytesNeeded, dataLen;
2100
2101     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2102     {
2103         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2104
2105         bytesNeeded = dataLen + 2 + sizeof(LPWSTR);
2106         if (!pvStructInfo)
2107             *pcbStructInfo = bytesNeeded;
2108         else if (*pcbStructInfo < bytesNeeded)
2109         {
2110             *pcbStructInfo = bytesNeeded;
2111             SetLastError(ERROR_MORE_DATA);
2112             ret = FALSE;
2113         }
2114         else
2115         {
2116             LPWSTR str;
2117             DWORD i;
2118
2119             *pcbStructInfo = bytesNeeded;
2120             assert(pvStructInfo);
2121             str = *(LPWSTR *)pvStructInfo;
2122             for (i = 0; i < dataLen / 2; i++)
2123                 str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
2124                  pbEncoded[1 + lenBytes + 2 * i + 1];
2125             /* Decoded string is always NULL-terminated */
2126             str[i] = '\0';
2127         }
2128     }
2129     return ret;
2130 }
2131
2132 static BOOL WINAPI CRYPT_AsnDecodeProgramName(DWORD dwCertEncodingType,
2133  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2134  void *pvStructInfo, DWORD *pcbStructInfo)
2135 {
2136     BOOL ret = FALSE;
2137     DWORD dataLen;
2138
2139     TRACE("(%p, %d, %08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
2140      pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
2141
2142     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2143     {
2144         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2145
2146         ret = CRYPT_AsnDecodeBMPString(dwCertEncodingType, lpszStructType,
2147          pbEncoded + 1 + lenBytes, dataLen, dwFlags, pvStructInfo,
2148          pcbStructInfo);
2149     }
2150     return ret;
2151 }
2152
2153 BOOL WINAPI WVTAsn1SpcSpOpusInfoDecode(DWORD dwCertEncodingType,
2154  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2155  void *pvStructInfo, DWORD *pcbStructInfo)
2156 {
2157     BOOL ret = FALSE;
2158
2159     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2160      pvStructInfo, *pcbStructInfo);
2161
2162     __TRY
2163     {
2164         struct AsnDecodeSequenceItem items[] = {
2165          { ASN_CONSTRUCTOR | ASN_CONTEXT,
2166            offsetof(SPC_SP_OPUS_INFO, pwszProgramName),
2167            CRYPT_AsnDecodeProgramName, sizeof(LPCWSTR), TRUE, TRUE,
2168            offsetof(SPC_SP_OPUS_INFO, pwszProgramName), 0 },
2169          { ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
2170            offsetof(SPC_SP_OPUS_INFO, pMoreInfo),
2171            CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
2172            offsetof(SPC_SP_OPUS_INFO, pMoreInfo), 0 },
2173          { ASN_CONSTRUCTOR | ASN_CONTEXT | 2,
2174            offsetof(SPC_SP_OPUS_INFO, pPublisherInfo),
2175            CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
2176            offsetof(SPC_SP_OPUS_INFO, pPublisherInfo), 0 },
2177         };
2178
2179         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2180          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2181          pvStructInfo, pcbStructInfo, NULL);
2182     }
2183     __EXCEPT_PAGE_FAULT
2184     {
2185         SetLastError(STATUS_ACCESS_VIOLATION);
2186     }
2187     __ENDTRY
2188     TRACE("returning %d\n", ret);
2189     return ret;
2190 }
2191
2192 /* Ignores tag.  Only allows integers 4 bytes or smaller in size. */
2193 static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
2194  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2195  void *pvStructInfo, DWORD *pcbStructInfo)
2196 {
2197     BOOL ret;
2198     DWORD dataLen;
2199
2200     if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
2201     {
2202         BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
2203
2204         if (dataLen > sizeof(int))
2205         {
2206             SetLastError(CRYPT_E_ASN1_LARGE);
2207             ret = FALSE;
2208         }
2209         else if (!pvStructInfo)
2210             *pcbStructInfo = sizeof(int);
2211         else if (*pcbStructInfo < sizeof(int))
2212         {
2213             *pcbStructInfo = sizeof(int);
2214             SetLastError(ERROR_MORE_DATA);
2215             ret = FALSE;
2216         }
2217         else
2218         {
2219             int val;
2220             DWORD i;
2221
2222             *pcbStructInfo = sizeof(int);
2223             if (dataLen && pbEncoded[1 + lenBytes] & 0x80)
2224             {
2225                 /* initialize to a negative value to sign-extend */
2226                 val = -1;
2227             }
2228             else
2229                 val = 0;
2230             for (i = 0; i < dataLen; i++)
2231             {
2232                 val <<= 8;
2233                 val |= pbEncoded[1 + lenBytes + i];
2234             }
2235             memcpy(pvStructInfo, &val, sizeof(int));
2236         }
2237     }
2238     return ret;
2239 }
2240
2241 BOOL WINAPI WVTAsn1CatMemberInfoDecode(DWORD dwCertEncodingType,
2242  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2243  void *pvStructInfo, DWORD *pcbStructInfo)
2244 {
2245     BOOL ret = FALSE;
2246
2247     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2248      pvStructInfo, *pcbStructInfo);
2249
2250     __TRY
2251     {
2252         struct AsnDecodeSequenceItem items[] = {
2253          { ASN_BMPSTRING, offsetof(CAT_MEMBERINFO, pwszSubjGuid),
2254            CRYPT_AsnDecodeBMPString, sizeof(LPWSTR), FALSE, TRUE,
2255            offsetof(CAT_MEMBERINFO, pwszSubjGuid), 0 },
2256          { ASN_INTEGER, offsetof(CAT_MEMBERINFO, dwCertVersion),
2257            CRYPT_AsnDecodeInt, FINALMEMBERSIZE(CAT_MEMBERINFO, dwCertVersion),
2258            FALSE, FALSE, 0, 0 },
2259         };
2260
2261         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2262          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2263          pvStructInfo, pcbStructInfo, NULL);
2264     }
2265     __EXCEPT_PAGE_FAULT
2266     {
2267         SetLastError(STATUS_ACCESS_VIOLATION);
2268     }
2269     __ENDTRY
2270     TRACE("returning %d\n", ret);
2271     return ret;
2272 }
2273
2274 BOOL WINAPI WVTAsn1CatNameValueDecode(DWORD dwCertEncodingType,
2275  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2276  void *pvStructInfo, DWORD *pcbStructInfo)
2277 {
2278     BOOL ret = FALSE;
2279
2280     TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2281      pvStructInfo, *pcbStructInfo);
2282
2283     __TRY
2284     {
2285         struct AsnDecodeSequenceItem items[] = {
2286          { ASN_BMPSTRING, offsetof(CAT_NAMEVALUE, pwszTag),
2287            CRYPT_AsnDecodeBMPString, sizeof(LPWSTR), FALSE, TRUE,
2288            offsetof(CAT_NAMEVALUE, pwszTag), 0 },
2289          { ASN_INTEGER, offsetof(CAT_NAMEVALUE, fdwFlags),
2290            CRYPT_AsnDecodeInt, MEMBERSIZE(CAT_NAMEVALUE, fdwFlags, Value),
2291            FALSE, FALSE, 0, 0 },
2292          { ASN_OCTETSTRING, offsetof(CAT_NAMEVALUE, Value),
2293            CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
2294            offsetof(CAT_NAMEVALUE, Value.pbData), 0 },
2295         };
2296
2297         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2298          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2299          pvStructInfo, pcbStructInfo, NULL);
2300     }
2301     __EXCEPT_PAGE_FAULT
2302     {
2303         SetLastError(STATUS_ACCESS_VIOLATION);
2304     }
2305     __ENDTRY
2306     TRACE("returning %d\n", ret);
2307     return ret;
2308 }
2309
2310 static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
2311  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2312  void *pvStructInfo, DWORD *pcbStructInfo)
2313 {
2314     BOOL ret;
2315
2316     if (cbEncoded < 3)
2317     {
2318         SetLastError(CRYPT_E_ASN1_CORRUPT);
2319         return FALSE;
2320     }
2321     if (GET_LEN_BYTES(pbEncoded[1]) > 1)
2322     {
2323         SetLastError(CRYPT_E_ASN1_CORRUPT);
2324         return FALSE;
2325     }
2326     if (pbEncoded[1] > 1)
2327     {
2328         SetLastError(CRYPT_E_ASN1_CORRUPT);
2329         return FALSE;
2330     }
2331     if (!pvStructInfo)
2332     {
2333         *pcbStructInfo = sizeof(BOOL);
2334         ret = TRUE;
2335     }
2336     else if (*pcbStructInfo < sizeof(BOOL))
2337     {
2338         *pcbStructInfo = sizeof(BOOL);
2339         SetLastError(ERROR_MORE_DATA);
2340         ret = FALSE;
2341     }
2342     else
2343     {
2344         *pcbStructInfo = sizeof(BOOL);
2345         *(BOOL *)pvStructInfo = pbEncoded[2] != 0;
2346         ret = TRUE;
2347     }
2348     TRACE("returning %d (%08x)\n", ret, GetLastError());
2349     return ret;
2350 }
2351
2352 BOOL WINAPI WVTAsn1SpcFinancialCriteriaInfoDecode(DWORD dwCertEncodingType,
2353  LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
2354  void *pvStructInfo, DWORD *pcbStructInfo)
2355 {
2356     BOOL ret = FALSE;
2357
2358     TRACE("(%p, %d, %08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
2359      pvStructInfo, *pcbStructInfo);
2360
2361     __TRY
2362     {
2363         struct AsnDecodeSequenceItem items[] = {
2364          { ASN_BOOL, offsetof(SPC_FINANCIAL_CRITERIA, fFinancialInfoAvailable),
2365            CRYPT_AsnDecodeBool, MEMBERSIZE(SPC_FINANCIAL_CRITERIA,
2366            fFinancialInfoAvailable, fMeetsCriteria), FALSE, FALSE, 0, 0 },
2367          { ASN_BOOL, offsetof(SPC_FINANCIAL_CRITERIA, fMeetsCriteria),
2368            CRYPT_AsnDecodeBool, FINALMEMBERSIZE(SPC_FINANCIAL_CRITERIA,
2369            fMeetsCriteria), FALSE, FALSE, 0, 0 },
2370         };
2371
2372         ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
2373          sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
2374          pvStructInfo, pcbStructInfo, NULL);
2375     }
2376     __EXCEPT_PAGE_FAULT
2377     {
2378         SetLastError(STATUS_ACCESS_VIOLATION);
2379     }
2380     __ENDTRY
2381     TRACE("returning %d\n", ret);
2382     return ret;
2383 }