dlls/crypt32/msg.c

   1 /*
   2  * Copyright 2007 Juan Lang
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18 #include <stdarg.h>
  19 #include "windef.h"
  20 #include "winbase.h"
  21 #include "wincrypt.h"
  22 #include "snmp.h"
  23
  24 #include "wine/debug.h"
  25 #include "wine/exception.h"
  26 #include "crypt32_private.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
  29
  30 /* Called when a message's ref count reaches zero.  Free any message-specific
  31  * data here.
  32  */
  33 typedef void (*CryptMsgCloseFunc)(HCRYPTMSG msg);
  34
  35 typedef BOOL (*CryptMsgGetParamFunc)(HCRYPTMSG hCryptMsg, DWORD dwParamType,
  36  DWORD dwIndex, void *pvData, DWORD *pcbData);
  37
  38 typedef BOOL (*CryptMsgUpdateFunc)(HCRYPTMSG hCryptMsg, const BYTE *pbData,
  39  DWORD cbData, BOOL fFinal);
  40
  41 typedef enum _CryptMsgState {
  42     MsgStateInit,
  43     MsgStateUpdated,
  44     MsgStateFinalized
  45 } CryptMsgState;
  46
  47 typedef struct _CryptMsgBase
  48 {
  49     LONG                 ref;
  50     DWORD                open_flags;
  51     BOOL                 streamed;
  52     CMSG_STREAM_INFO     stream_info;
  53     CryptMsgState        state;
  54     CryptMsgCloseFunc    close;
  55     CryptMsgUpdateFunc   update;
  56     CryptMsgGetParamFunc get_param;
  57 } CryptMsgBase;
  58
  59 static inline void CryptMsgBase_Init(CryptMsgBase *msg, DWORD dwFlags,
  60  PCMSG_STREAM_INFO pStreamInfo, CryptMsgCloseFunc close,
  61  CryptMsgGetParamFunc get_param, CryptMsgUpdateFunc update)
  62 {
  63     msg->ref = 1;
  64     msg->open_flags = dwFlags;
  65     if (pStreamInfo)
  66     {
  67         msg->streamed = TRUE;
  68         memcpy(&msg->stream_info, pStreamInfo, sizeof(msg->stream_info));
  69     }
  70     else
  71     {
  72         msg->streamed = FALSE;
  73         memset(&msg->stream_info, 0, sizeof(msg->stream_info));
  74     }
  75     msg->close = close;
  76     msg->get_param = get_param;
  77     msg->update = update;
  78     msg->state = MsgStateInit;
  79 }
  80
  81 typedef struct _CDataEncodeMsg
  82 {
  83     CryptMsgBase base;
  84     DWORD        bare_content_len;
  85     LPBYTE       bare_content;
  86 } CDataEncodeMsg;
  87
  88 static const BYTE empty_data_content[] = { 0x04,0x00 };
  89
  90 static void CDataEncodeMsg_Close(HCRYPTMSG hCryptMsg)
  91 {
  92     CDataEncodeMsg *msg = (CDataEncodeMsg *)hCryptMsg;
  93
  94     if (msg->bare_content != empty_data_content)
  95         LocalFree(msg->bare_content);
  96 }
  97
  98 static WINAPI BOOL CRYPT_EncodeContentLength(DWORD dwCertEncodingType,
  99  LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
 100  PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
 101 {
 102     const CDataEncodeMsg *msg = (const CDataEncodeMsg *)pvStructInfo;
 103     DWORD lenBytes;
 104     BOOL ret = TRUE;
 105
 106     /* Trick:  report bytes needed based on total message length, even though
 107      * the message isn't available yet.  The caller will use the length
 108      * reported here to encode its length.
 109      */
 110     CRYPT_EncodeLen(msg->base.stream_info.cbContent, NULL, &lenBytes);
 111     if (!pbEncoded)
 112         *pcbEncoded = 1 + lenBytes + msg->base.stream_info.cbContent;
 113     else
 114     {
 115         if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
 116          pcbEncoded, 1 + lenBytes)))
 117         {
 118             if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
 119                 pbEncoded = *(BYTE **)pbEncoded;
 120             *pbEncoded++ = ASN_OCTETSTRING;
 121             CRYPT_EncodeLen(msg->base.stream_info.cbContent, pbEncoded,
 122              &lenBytes);
 123         }
 124     }
 125     return ret;
 126 }
 127
 128 static BOOL CRYPT_EncodeDataContentInfoHeader(CDataEncodeMsg *msg,
 129  CRYPT_DATA_BLOB *header)
 130 {
 131     BOOL ret;
 132
 133     if (msg->base.streamed && msg->base.stream_info.cbContent == 0xffffffff)
 134     {
 135         FIXME("unimplemented for indefinite-length encoding\n");
 136         header->cbData = 0;
 137         header->pbData = NULL;
 138         ret = TRUE;
 139     }
 140     else
 141     {
 142         struct AsnConstructedItem constructed = { 0, msg,
 143          CRYPT_EncodeContentLength };
 144         struct AsnEncodeSequenceItem items[2] = {
 145          { szOID_RSA_data, CRYPT_AsnEncodeOid, 0 },
 146          { &constructed,   CRYPT_AsnEncodeConstructed, 0 },
 147         };
 148
 149         ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING, items,
 150          sizeof(items) / sizeof(items[0]), CRYPT_ENCODE_ALLOC_FLAG, NULL,
 151          (LPBYTE)&header->pbData, &header->cbData);
 152         if (ret)
 153         {
 154             /* Trick:  subtract the content length from the reported length,
 155              * as the actual content hasn't come yet.
 156              */
 157             header->cbData -= msg->base.stream_info.cbContent;
 158         }
 159     }
 160     return ret;
 161 }
 162
 163 static BOOL CDataEncodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
 164  DWORD cbData, BOOL fFinal)
 165 {
 166     CDataEncodeMsg *msg = (CDataEncodeMsg *)hCryptMsg;
 167     BOOL ret = FALSE;
 168
 169     if (msg->base.streamed)
 170     {
 171         __TRY
 172         {
 173             if (msg->base.state != MsgStateUpdated)
 174             {
 175                 CRYPT_DATA_BLOB header;
 176
 177                 ret = CRYPT_EncodeDataContentInfoHeader(msg, &header);
 178                 if (ret)
 179                 {
 180                     ret = msg->base.stream_info.pfnStreamOutput(
 181                      msg->base.stream_info.pvArg, header.pbData, header.cbData,
 182                      FALSE);
 183                     LocalFree(header.pbData);
 184                 }
 185             }
 186             if (!fFinal)
 187                 ret = msg->base.stream_info.pfnStreamOutput(
 188                  msg->base.stream_info.pvArg, (BYTE *)pbData, cbData,
 189                  FALSE);
 190             else
 191             {
 192                 if (msg->base.stream_info.cbContent == 0xffffffff)
 193                 {
 194                     BYTE indefinite_trailer[6] = { 0 };
 195
 196                     ret = msg->base.stream_info.pfnStreamOutput(
 197                      msg->base.stream_info.pvArg, (BYTE *)pbData, cbData,
 198                      FALSE);
 199                     if (ret)
 200                         ret = msg->base.stream_info.pfnStreamOutput(
 201                          msg->base.stream_info.pvArg, indefinite_trailer,
 202                          sizeof(indefinite_trailer), TRUE);
 203                 }
 204                 else
 205                     ret = msg->base.stream_info.pfnStreamOutput(
 206                      msg->base.stream_info.pvArg, (BYTE *)pbData, cbData, TRUE);
 207             }
 208         }
 209         __EXCEPT_PAGE_FAULT
 210         {
 211             SetLastError(STATUS_ACCESS_VIOLATION);
 212         }
 213         __ENDTRY;
 214     }
 215     else
 216     {
 217         if (!fFinal)
 218         {
 219             if (msg->base.open_flags & CMSG_DETACHED_FLAG)
 220                 SetLastError(E_INVALIDARG);
 221             else
 222                 SetLastError(CRYPT_E_MSG_ERROR);
 223         }
 224         else
 225         {
 226             if (!cbData)
 227                 SetLastError(E_INVALIDARG);
 228             else
 229             {
 230                 CRYPT_DATA_BLOB blob = { cbData, (LPBYTE)pbData };
 231
 232                 /* non-streamed data messages don't allow non-final updates,
 233                  * don't bother checking whether data already exist, they can't.
 234                  */
 235                 ret = CryptEncodeObjectEx(X509_ASN_ENCODING, X509_OCTET_STRING,
 236                  &blob, CRYPT_ENCODE_ALLOC_FLAG, NULL, &msg->bare_content,
 237                  &msg->bare_content_len);
 238             }
 239         }
 240     }
 241     return ret;
 242 }
 243
 244 static BOOL CRYPT_CopyParam(void *pvData, DWORD *pcbData, const BYTE *src,
 245  DWORD len)
 246 {
 247     BOOL ret = TRUE;
 248
 249     if (!pvData)
 250         *pcbData = len;
 251     else if (*pcbData < len)
 252     {
 253         *pcbData = len;
 254         SetLastError(ERROR_MORE_DATA);
 255         ret = FALSE;
 256     }
 257     else
 258     {
 259         *pcbData = len;
 260         memcpy(pvData, src, len);
 261     }
 262     return ret;
 263 }
 264
 265 static BOOL CDataEncodeMsg_GetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
 266  DWORD dwIndex, void *pvData, DWORD *pcbData)
 267 {
 268     CDataEncodeMsg *msg = (CDataEncodeMsg *)hCryptMsg;
 269     BOOL ret = FALSE;
 270
 271     switch (dwParamType)
 272     {
 273     case CMSG_CONTENT_PARAM:
 274         if (msg->base.streamed)
 275             SetLastError(E_INVALIDARG);
 276         else
 277         {
 278             CRYPT_CONTENT_INFO info;
 279             char rsa_data[] = "1.2.840.113549.1.7.1";
 280
 281             info.pszObjId = rsa_data;
 282             info.Content.cbData = msg->bare_content_len;
 283             info.Content.pbData = msg->bare_content;
 284             ret = CryptEncodeObject(X509_ASN_ENCODING, PKCS_CONTENT_INFO, &info,
 285              pvData, pcbData);
 286         }
 287         break;
 288     case CMSG_BARE_CONTENT_PARAM:
 289         if (msg->base.streamed)
 290             SetLastError(E_INVALIDARG);
 291         else
 292             ret = CRYPT_CopyParam(pvData, pcbData, msg->bare_content,
 293              msg->bare_content_len);
 294         break;
 295     default:
 296         SetLastError(CRYPT_E_INVALID_MSG_TYPE);
 297     }
 298     return ret;
 299 }
 300
 301 static HCRYPTMSG CDataEncodeMsg_Open(DWORD dwFlags, const void *pvMsgEncodeInfo,
 302  LPSTR pszInnerContentObjID, PCMSG_STREAM_INFO pStreamInfo)
 303 {
 304     CDataEncodeMsg *msg;
 305
 306     if (pvMsgEncodeInfo)
 307     {
 308         SetLastError(E_INVALIDARG);
 309         return NULL;
 310     }
 311     msg = CryptMemAlloc(sizeof(CDataEncodeMsg));
 312     if (msg)
 313     {
 314         CryptMsgBase_Init((CryptMsgBase *)msg, dwFlags, pStreamInfo,
 315          CDataEncodeMsg_Close, CDataEncodeMsg_GetParam, CDataEncodeMsg_Update);
 316         msg->bare_content_len = sizeof(empty_data_content);
 317         msg->bare_content = (LPBYTE)empty_data_content;
 318     }
 319     return (HCRYPTMSG)msg;
 320 }
 321
 322 typedef struct _CHashEncodeMsg
 323 {
 324     CryptMsgBase    base;
 325     HCRYPTPROV      prov;
 326     HCRYPTHASH      hash;
 327     CRYPT_DATA_BLOB data;
 328 } CHashEncodeMsg;
 329
 330 static void CHashEncodeMsg_Close(HCRYPTMSG hCryptMsg)
 331 {
 332     CHashEncodeMsg *msg = (CHashEncodeMsg *)hCryptMsg;
 333
 334     CryptMemFree(msg->data.pbData);
 335     CryptDestroyHash(msg->hash);
 336     if (msg->base.open_flags & CMSG_CRYPT_RELEASE_CONTEXT_FLAG)
 337         CryptReleaseContext(msg->prov, 0);
 338 }
 339
 340 static BOOL CRYPT_EncodePKCSDigestedData(CHashEncodeMsg *msg, void *pvData,
 341  DWORD *pcbData)
 342 {
 343     BOOL ret;
 344     ALG_ID algID;
 345     DWORD size = sizeof(algID);
 346
 347     ret = CryptGetHashParam(msg->hash, HP_ALGID, (BYTE *)&algID, &size, 0);
 348     if (ret)
 349     {
 350         CRYPT_DIGESTED_DATA digestedData = { 0 };
 351         char oid_rsa_data[] = szOID_RSA_data;
 352
 353         digestedData.version = CMSG_HASHED_DATA_PKCS_1_5_VERSION;
 354         digestedData.DigestAlgorithm.pszObjId = (LPSTR)CertAlgIdToOID(algID);
 355         /* FIXME: what about digestedData.DigestAlgorithm.Parameters? */
 356         /* Quirk:  OID is only encoded messages if an update has happened */
 357         if (msg->base.state != MsgStateInit)
 358             digestedData.ContentInfo.pszObjId = oid_rsa_data;
 359         if (!(msg->base.open_flags & CMSG_DETACHED_FLAG) && msg->data.cbData)
 360         {
 361             ret = CRYPT_AsnEncodeOctets(0, NULL, &msg->data,
 362              CRYPT_ENCODE_ALLOC_FLAG, NULL,
 363              (LPBYTE)&digestedData.ContentInfo.Content.pbData,
 364              &digestedData.ContentInfo.Content.cbData);
 365         }
 366         if (msg->base.state == MsgStateFinalized)
 367         {
 368             size = sizeof(DWORD);
 369             ret = CryptGetHashParam(msg->hash, HP_HASHSIZE,
 370              (LPBYTE)&digestedData.hash.cbData, &size, 0);
 371             if (ret)
 372             {
 373                 digestedData.hash.pbData = CryptMemAlloc(
 374                  digestedData.hash.cbData);
 375                 ret = CryptGetHashParam(msg->hash, HP_HASHVAL,
 376                  digestedData.hash.pbData, &digestedData.hash.cbData, 0);
 377             }
 378         }
 379         if (ret)
 380             ret = CRYPT_AsnEncodePKCSDigestedData(&digestedData, pvData,
 381              pcbData);
 382         CryptMemFree(digestedData.hash.pbData);
 383         LocalFree(digestedData.ContentInfo.Content.pbData);
 384     }
 385     return ret;
 386 }
 387
 388 static BOOL CHashEncodeMsg_GetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
 389  DWORD dwIndex, void *pvData, DWORD *pcbData)
 390 {
 391     CHashEncodeMsg *msg = (CHashEncodeMsg *)hCryptMsg;
 392     BOOL ret = FALSE;
 393
 394     TRACE("(%p, %d, %d, %p, %p)\n", hCryptMsg, dwParamType, dwIndex,
 395      pvData, pcbData);
 396
 397     switch (dwParamType)
 398     {
 399     case CMSG_BARE_CONTENT_PARAM:
 400         if (msg->base.streamed)
 401             SetLastError(E_INVALIDARG);
 402         else
 403             ret = CRYPT_EncodePKCSDigestedData(msg, pvData, pcbData);
 404         break;
 405     case CMSG_CONTENT_PARAM:
 406     {
 407         CRYPT_CONTENT_INFO info;
 408
 409         ret = CryptMsgGetParam(hCryptMsg, CMSG_BARE_CONTENT_PARAM, 0, NULL,
 410          &info.Content.cbData);
 411         if (ret)
 412         {
 413             info.Content.pbData = CryptMemAlloc(info.Content.cbData);
 414             if (info.Content.pbData)
 415             {
 416                 ret = CryptMsgGetParam(hCryptMsg, CMSG_BARE_CONTENT_PARAM, 0,
 417                  info.Content.pbData, &info.Content.cbData);
 418                 if (ret)
 419                 {
 420                     char oid_rsa_hashed[] = szOID_RSA_hashedData;
 421
 422                     info.pszObjId = oid_rsa_hashed;
 423                     ret = CryptEncodeObjectEx(X509_ASN_ENCODING,
 424                      PKCS_CONTENT_INFO, &info, 0, NULL, pvData, pcbData);
 425                 }
 426                 CryptMemFree(info.Content.pbData);
 427             }
 428             else
 429                 ret = FALSE;
 430         }
 431         break;
 432     }
 433     case CMSG_COMPUTED_HASH_PARAM:
 434         ret = CryptGetHashParam(msg->hash, HP_HASHVAL, (BYTE *)pvData, pcbData,
 435          0);
 436         break;
 437     case CMSG_VERSION_PARAM:
 438         if (msg->base.state != MsgStateFinalized)
 439             SetLastError(CRYPT_E_MSG_ERROR);
 440         else
 441         {
 442             DWORD version = CMSG_HASHED_DATA_PKCS_1_5_VERSION;
 443
 444             /* Since the data are always encoded as octets, the version is
 445              * always 0 (see rfc3852, section 7)
 446              */
 447             ret = CRYPT_CopyParam(pvData, pcbData, (const BYTE *)&version,
 448              sizeof(version));
 449         }
 450         break;
 451     default:
 452         ret = FALSE;
 453     }
 454     return ret;
 455 }
 456
 457 static BOOL CHashEncodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
 458  DWORD cbData, BOOL fFinal)
 459 {
 460     CHashEncodeMsg *msg = (CHashEncodeMsg *)hCryptMsg;
 461     BOOL ret = FALSE;
 462
 463     TRACE("(%p, %p, %d, %d)\n", hCryptMsg, pbData, cbData, fFinal);
 464
 465     if (msg->base.streamed || (msg->base.open_flags & CMSG_DETACHED_FLAG))
 466     {
 467         /* Doesn't do much, as stream output is never called, and you
 468          * can't get the content.
 469          */
 470         ret = CryptHashData(msg->hash, pbData, cbData, 0);
 471     }
 472     else
 473     {
 474         if (!fFinal)
 475             SetLastError(CRYPT_E_MSG_ERROR);
 476         else
 477         {
 478             ret = CryptHashData(msg->hash, pbData, cbData, 0);
 479             if (ret)
 480             {
 481                 msg->data.pbData = CryptMemAlloc(cbData);
 482                 if (msg->data.pbData)
 483                 {
 484                     memcpy(msg->data.pbData + msg->data.cbData, pbData, cbData);
 485                     msg->data.cbData += cbData;
 486                 }
 487                 else
 488                     ret = FALSE;
 489             }
 490         }
 491     }
 492     return ret;
 493 }
 494
 495 static HCRYPTMSG CHashEncodeMsg_Open(DWORD dwFlags, const void *pvMsgEncodeInfo,
 496  LPSTR pszInnerContentObjID, PCMSG_STREAM_INFO pStreamInfo)
 497 {
 498     CHashEncodeMsg *msg;
 499     const CMSG_HASHED_ENCODE_INFO *info =
 500      (const CMSG_HASHED_ENCODE_INFO *)pvMsgEncodeInfo;
 501     HCRYPTPROV prov;
 502     ALG_ID algID;
 503
 504     if (info->cbSize != sizeof(CMSG_HASHED_ENCODE_INFO))
 505     {
 506         SetLastError(E_INVALIDARG);
 507         return NULL;
 508     }
 509     if (!(algID = CertOIDToAlgId(info->HashAlgorithm.pszObjId)))
 510     {
 511         SetLastError(CRYPT_E_UNKNOWN_ALGO);
 512         return NULL;
 513     }
 514     if (info->hCryptProv)
 515         prov = info->hCryptProv;
 516     else
 517     {
 518         prov = CRYPT_GetDefaultProvider();
 519         dwFlags &= ~CMSG_CRYPT_RELEASE_CONTEXT_FLAG;
 520     }
 521     msg = CryptMemAlloc(sizeof(CHashEncodeMsg));
 522     if (msg)
 523     {
 524         CryptMsgBase_Init((CryptMsgBase *)msg, dwFlags, pStreamInfo,
 525          CHashEncodeMsg_Close, CHashEncodeMsg_GetParam, CHashEncodeMsg_Update);
 526         msg->prov = prov;
 527         msg->data.cbData = 0;
 528         msg->data.pbData = NULL;
 529         if (!CryptCreateHash(prov, algID, 0, 0, &msg->hash))
 530         {
 531             CryptMsgClose(msg);
 532             msg = NULL;
 533         }
 534     }
 535     return (HCRYPTMSG)msg;
 536 }
 537
 538 typedef struct _CMSG_SIGNER_ENCODE_INFO_WITH_CMS
 539 {
 540     DWORD                      cbSize;
 541     PCERT_INFO                 pCertInfo;
 542     HCRYPTPROV                 hCryptProv;
 543     DWORD                      dwKeySpec;
 544     CRYPT_ALGORITHM_IDENTIFIER HashAlgorithm;
 545     void                      *pvHashAuxInfo;
 546     DWORD                      cAuthAttr;
 547     PCRYPT_ATTRIBUTE           rgAuthAttr;
 548     DWORD                      cUnauthAttr;
 549     PCRYPT_ATTRIBUTE           rgUnauthAttr;
 550     CERT_ID                    SignerId;
 551     CRYPT_ALGORITHM_IDENTIFIER HashEncryptionAlgorithm;
 552     void                      *pvHashEncryptionAuxInfo;
 553 } CMSG_SIGNER_ENCODE_INFO_WITH_CMS, *PCMSG_SIGNER_ENCODE_INFO_WITH_CMS;
 554
 555 typedef struct _CMSG_SIGNED_ENCODE_INFO_WITH_CMS
 556 {
 557     DWORD                             cbSize;
 558     DWORD                             cSigners;
 559     PCMSG_SIGNER_ENCODE_INFO_WITH_CMS rgSigners;
 560     DWORD                             cCertEncoded;
 561     PCERT_BLOB                        rgCertEncoded;
 562     DWORD                             cCrlEncoded;
 563     PCRL_BLOB                         rgCrlEncoded;
 564     DWORD                             cAttrCertEncoded;
 565     PCERT_BLOB                        rgAttrCertEncoded;
 566 } CMSG_SIGNED_ENCODE_INFO_WITH_CMS, *PCMSG_SIGNED_ENCODE_INFO_WITH_CMS;
 567
 568 static BOOL CRYPT_IsValidSigner(CMSG_SIGNER_ENCODE_INFO_WITH_CMS *signer)
 569 {
 570     if (signer->cbSize != sizeof(CMSG_SIGNER_ENCODE_INFO) &&
 571      signer->cbSize != sizeof(CMSG_SIGNER_ENCODE_INFO_WITH_CMS))
 572     {
 573         SetLastError(E_INVALIDARG);
 574         return FALSE;
 575     }
 576     if (signer->cbSize == sizeof(CMSG_SIGNER_ENCODE_INFO_WITH_CMS))
 577     {
 578         FIXME("CMSG_SIGNER_ENCODE_INFO with CMS fields unsupported\n");
 579         return FALSE;
 580     }
 581     if (!signer->pCertInfo->SerialNumber.cbData)
 582     {
 583         SetLastError(E_INVALIDARG);
 584         return FALSE;
 585     }
 586     if (!signer->pCertInfo->Issuer.cbData)
 587     {
 588         SetLastError(E_INVALIDARG);
 589         return FALSE;
 590     }
 591     if (!signer->hCryptProv)
 592     {
 593         SetLastError(E_INVALIDARG);
 594         return FALSE;
 595     }
 596     if (!CertOIDToAlgId(signer->HashAlgorithm.pszObjId))
 597     {
 598         SetLastError(CRYPT_E_UNKNOWN_ALGO);
 599         return FALSE;
 600     }
 601     return TRUE;
 602 }
 603
 604 typedef struct _CSignerInfo
 605 {
 606     HCRYPTPROV       prov;
 607     HCRYPTHASH       hash;
 608     HCRYPTKEY        key;
 609     CMSG_SIGNER_INFO info;
 610 } CSignerInfo;
 611
 612 static BOOL CRYPT_CopyBlob(CRYPT_DATA_BLOB *out, const CRYPT_DATA_BLOB *in)
 613 {
 614     BOOL ret = TRUE;
 615
 616     out->cbData = in->cbData;
 617     if (out->cbData)
 618     {
 619         out->pbData = CryptMemAlloc(out->cbData);
 620         if (out->pbData)
 621             memcpy(out->pbData, in->pbData, out->cbData);
 622         else
 623             ret = FALSE;
 624     }
 625     else
 626         out->pbData = NULL;
 627     return ret;
 628 }
 629
 630 static BOOL CRYPT_CopyAttribute(CRYPT_ATTRIBUTE *out, const CRYPT_ATTRIBUTE *in)
 631 {
 632     BOOL ret = TRUE;
 633
 634     /* Assumption:  algorithm IDs will point to static strings, not stack-based
 635      * ones, so copying the pointer values is safe.
 636      */
 637     out->pszObjId = in->pszObjId;
 638     out->cValue = in->cValue;
 639     if (out->cValue)
 640     {
 641         out->rgValue = CryptMemAlloc(out->cValue * sizeof(CRYPT_DATA_BLOB));
 642         if (out->rgValue)
 643         {
 644             DWORD i;
 645
 646             memset(out->rgValue, 0, out->cValue * sizeof(CRYPT_DATA_BLOB));
 647             for (i = 0; ret && i < out->cValue; i++)
 648                 ret = CRYPT_CopyBlob(&out->rgValue[i], &in->rgValue[i]);
 649         }
 650         else
 651             ret = FALSE;
 652     }
 653     return ret;
 654 }
 655
 656 static BOOL CRYPT_CopyAttributes(CRYPT_ATTRIBUTES *out,
 657  const CRYPT_ATTRIBUTES *in)
 658 {
 659     BOOL ret = TRUE;
 660
 661     out->cAttr = in->cAttr;
 662     if (out->cAttr)
 663     {
 664         out->rgAttr = CryptMemAlloc(out->cAttr * sizeof(CRYPT_ATTRIBUTE));
 665         if (out->rgAttr)
 666         {
 667             DWORD i;
 668
 669             memset(out->rgAttr, 0, out->cAttr * sizeof(CRYPT_ATTRIBUTE));
 670             for (i = 0; ret && i < out->cAttr; i++)
 671                 ret = CRYPT_CopyAttribute(&out->rgAttr[i], &in->rgAttr[i]);
 672         }
 673         else
 674             ret = FALSE;
 675     }
 676     else
 677         out->rgAttr = NULL;
 678     return ret;
 679 }
 680
 681 static BOOL CSignerInfo_Construct(CSignerInfo *out,
 682  CMSG_SIGNER_ENCODE_INFO_WITH_CMS *in, DWORD open_flags)
 683 {
 684     ALG_ID algID;
 685     BOOL ret;
 686
 687     out->prov = in->hCryptProv;
 688     if (!(open_flags & CMSG_CRYPT_RELEASE_CONTEXT_FLAG))
 689         CryptContextAddRef(out->prov, NULL, 0);
 690     algID = CertOIDToAlgId(in->HashAlgorithm.pszObjId);
 691     ret = CryptCreateHash(out->prov, algID, 0, 0, &out->hash);
 692     if (ret)
 693     {
 694         /* Note: needs to change if CMS fields are supported */
 695         out->info.dwVersion = CMSG_SIGNER_INFO_V1;
 696         ret = CRYPT_CopyBlob(&out->info.Issuer, &in->pCertInfo->Issuer);
 697         if (ret)
 698             ret = CRYPT_CopyBlob(&out->info.SerialNumber,
 699              &in->pCertInfo->SerialNumber);
 700         /* Assumption:  algorithm IDs will point to static strings, not
 701          * stack-based ones, so copying the pointer values is safe.
 702          */
 703         out->info.HashAlgorithm.pszObjId = in->HashAlgorithm.pszObjId;
 704         if (ret)
 705             ret = CRYPT_CopyBlob(&out->info.HashAlgorithm.Parameters,
 706              &in->HashAlgorithm.Parameters);
 707         memset(&out->info.HashEncryptionAlgorithm, 0,
 708          sizeof(out->info.HashEncryptionAlgorithm));
 709         if (ret)
 710             ret = CRYPT_CopyAttributes(&out->info.AuthAttrs,
 711              (CRYPT_ATTRIBUTES *)&in->cAuthAttr);
 712         if (ret)
 713             ret = CRYPT_CopyAttributes(&out->info.UnauthAttrs,
 714              (CRYPT_ATTRIBUTES *)&in->cUnauthAttr);
 715     }
 716     return ret;
 717 }
 718
 719 static void CSignerInfo_Free(CSignerInfo *signer)
 720 {
 721     DWORD i, j;
 722
 723     CryptDestroyKey(signer->key);
 724     CryptDestroyHash(signer->hash);
 725     CryptReleaseContext(signer->prov, 0);
 726     CryptMemFree(signer->info.Issuer.pbData);
 727     CryptMemFree(signer->info.SerialNumber.pbData);
 728     CryptMemFree(signer->info.HashAlgorithm.Parameters.pbData);
 729     CryptMemFree(signer->info.EncryptedHash.pbData);
 730     for (i = 0; i < signer->info.AuthAttrs.cAttr; i++)
 731     {
 732         for (j = 0; j < signer->info.AuthAttrs.rgAttr[i].cValue; j++)
 733             CryptMemFree(signer->info.AuthAttrs.rgAttr[i].rgValue[j].pbData);
 734         CryptMemFree(signer->info.AuthAttrs.rgAttr[i].rgValue);
 735     }
 736     CryptMemFree(signer->info.AuthAttrs.rgAttr);
 737     for (i = 0; i < signer->info.UnauthAttrs.cAttr; i++)
 738     {
 739         for (j = 0; j < signer->info.UnauthAttrs.rgAttr[i].cValue; j++)
 740             CryptMemFree(signer->info.UnauthAttrs.rgAttr[i].rgValue[j].pbData);
 741         CryptMemFree(signer->info.UnauthAttrs.rgAttr[i].rgValue);
 742     }
 743     CryptMemFree(signer->info.UnauthAttrs.rgAttr);
 744 }
 745
 746 typedef struct _CSignedEncodeMsg
 747 {
 748     CryptMsgBase    base;
 749     CRYPT_DATA_BLOB data;
 750     DWORD           cSigners;
 751     CSignerInfo    *signers;
 752 } CSignedEncodeMsg;
 753
 754 static void CSignedEncodeMsg_Close(HCRYPTMSG hCryptMsg)
 755 {
 756     CSignedEncodeMsg *msg = (CSignedEncodeMsg *)hCryptMsg;
 757     DWORD i;
 758
 759     CryptMemFree(msg->data.pbData);
 760     for (i = 0; i < msg->cSigners; i++)
 761         CSignerInfo_Free(&msg->signers[i]);
 762     CryptMemFree(msg->signers);
 763 }
 764
 765 static BOOL CSignedEncodeMsg_GetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
 766  DWORD dwIndex, void *pvData, DWORD *pcbData)
 767 {
 768     CSignedEncodeMsg *msg = (CSignedEncodeMsg *)hCryptMsg;
 769     BOOL ret = FALSE;
 770
 771     switch (dwParamType)
 772     {
 773     case CMSG_COMPUTED_HASH_PARAM:
 774         if (dwIndex >= msg->cSigners)
 775             SetLastError(CRYPT_E_INVALID_INDEX);
 776         else
 777             ret = CryptGetHashParam(msg->signers[dwIndex].hash, HP_HASHVAL,
 778              pvData, pcbData, 0);
 779         break;
 780     default:
 781         FIXME("unimplemented for %d\n", dwParamType);
 782         SetLastError(CRYPT_E_INVALID_MSG_TYPE);
 783     }
 784     return ret;
 785 }
 786
 787 static BOOL CSignedEncodeMsg_UpdateHash(CSignedEncodeMsg *msg,
 788  const BYTE *pbData, DWORD cbData)
 789 {
 790     DWORD i;
 791     BOOL ret = TRUE;
 792
 793     TRACE("(%p, %p, %d)\n", msg, pbData, cbData);
 794
 795     for (i = 0; ret && i < msg->cSigners; i++)
 796         ret = CryptHashData(msg->signers[i].hash, pbData, cbData, 0);
 797     return ret;
 798 }
 799
 800 static void CRYPT_ReverseBytes(CRYPT_HASH_BLOB *hash)
 801 {
 802     DWORD i;
 803     BYTE tmp;
 804
 805     for (i = 0; i < hash->cbData / 2; i++)
 806     {
 807         tmp = hash->pbData[hash->cbData - i - 1];
 808         hash->pbData[hash->cbData - i - 1] = hash->pbData[i];
 809         hash->pbData[i] = tmp;
 810     }
 811 }
 812
 813 static BOOL CSignedEncodeMsg_Sign(CSignedEncodeMsg *msg)
 814 {
 815     DWORD i;
 816     BOOL ret = TRUE;
 817
 818     TRACE("(%p)\n", msg);
 819
 820     for (i = 0; ret && i < msg->cSigners; i++)
 821     {
 822         ret = CryptSignHashW(msg->signers[i].hash, AT_SIGNATURE, NULL, 0, NULL,
 823          &msg->signers[i].info.EncryptedHash.cbData);
 824         if (ret)
 825         {
 826             msg->signers[i].info.EncryptedHash.pbData =
 827              CryptMemAlloc(msg->signers[i].info.EncryptedHash.cbData);
 828             if (msg->signers[i].info.EncryptedHash.pbData)
 829             {
 830                 ret = CryptSignHashW(msg->signers[i].hash, AT_SIGNATURE, NULL,
 831                  0, msg->signers[i].info.EncryptedHash.pbData,
 832                  &msg->signers[i].info.EncryptedHash.cbData);
 833                 if (ret)
 834                     CRYPT_ReverseBytes(&msg->signers[i].info.EncryptedHash);
 835             }
 836             else
 837                 ret = FALSE;
 838         }
 839     }
 840     return ret;
 841 }
 842
 843 static BOOL CSignedEncodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
 844  DWORD cbData, BOOL fFinal)
 845 {
 846     CSignedEncodeMsg *msg = (CSignedEncodeMsg *)hCryptMsg;
 847     BOOL ret = FALSE;
 848
 849     if (msg->base.streamed || (msg->base.open_flags & CMSG_DETACHED_FLAG))
 850     {
 851         ret = CSignedEncodeMsg_UpdateHash(msg, pbData, cbData);
 852         /* FIXME: hash authenticated attributes on final update */
 853         if (ret && fFinal)
 854             ret = CSignedEncodeMsg_Sign(msg);
 855         if (msg->base.streamed)
 856             FIXME("streamed partial stub\n");
 857     }
 858     else
 859     {
 860         if (!fFinal)
 861             SetLastError(CRYPT_E_MSG_ERROR);
 862         else
 863         {
 864             if (cbData)
 865             {
 866                 msg->data.pbData = CryptMemAlloc(cbData);
 867                 if (msg->data.pbData)
 868                 {
 869                     memcpy(msg->data.pbData, pbData, cbData);
 870                     msg->data.cbData = cbData;
 871                     ret = TRUE;
 872                 }
 873             }
 874             else
 875                 ret = TRUE;
 876             if (ret)
 877                 ret = CSignedEncodeMsg_UpdateHash(msg, pbData, cbData);
 878             /* FIXME: hash authenticated attributes */
 879             if (ret)
 880                 ret = CSignedEncodeMsg_Sign(msg);
 881         }
 882     }
 883     return ret;
 884 }
 885
 886 static HCRYPTMSG CSignedEncodeMsg_Open(DWORD dwFlags,
 887  const void *pvMsgEncodeInfo, LPSTR pszInnerContentObjID,
 888  PCMSG_STREAM_INFO pStreamInfo)
 889 {
 890     const CMSG_SIGNED_ENCODE_INFO_WITH_CMS *info =
 891      (const CMSG_SIGNED_ENCODE_INFO_WITH_CMS *)pvMsgEncodeInfo;
 892     DWORD i;
 893     CSignedEncodeMsg *msg;
 894
 895     if (info->cbSize != sizeof(CMSG_SIGNED_ENCODE_INFO) &&
 896      info->cbSize != sizeof(CMSG_SIGNED_ENCODE_INFO_WITH_CMS))
 897     {
 898         SetLastError(E_INVALIDARG);
 899         return NULL;
 900     }
 901     if (info->cbSize == sizeof(CMSG_SIGNED_ENCODE_INFO_WITH_CMS))
 902     {
 903         FIXME("CMSG_SIGNED_ENCODE_INFO with CMS fields unsupported\n");
 904         return NULL;
 905     }
 906     for (i = 0; i < info->cSigners; i++)
 907         if (!CRYPT_IsValidSigner(&info->rgSigners[i]))
 908             return NULL;
 909     msg = CryptMemAlloc(sizeof(CSignedEncodeMsg));
 910     if (msg)
 911     {
 912         BOOL ret = TRUE;
 913
 914         CryptMsgBase_Init((CryptMsgBase *)msg, dwFlags, pStreamInfo,
 915          CSignedEncodeMsg_Close, CSignedEncodeMsg_GetParam,
 916          CSignedEncodeMsg_Update);
 917         msg->data.cbData = 0;
 918         msg->data.pbData = NULL;
 919         msg->cSigners = 0;
 920         if (info->cSigners)
 921         {
 922             msg->signers = CryptMemAlloc(info->cSigners * sizeof(CSignerInfo));
 923             if (msg->signers)
 924             {
 925                 msg->cSigners = info->cSigners;
 926                 memset(msg->signers, 0, msg->cSigners * sizeof(CSignerInfo));
 927                 for (i = 0; ret && i < msg->cSigners; i++)
 928                     ret = CSignerInfo_Construct(&msg->signers[i],
 929                      &info->rgSigners[i], dwFlags);
 930             }
 931             else
 932                 ret = FALSE;
 933         }
 934         if (!ret)
 935         {
 936             CSignedEncodeMsg_Close(msg);
 937             msg = NULL;
 938         }
 939     }
 940     return msg;
 941 }
 942
 943 static inline const char *MSG_TYPE_STR(DWORD type)
 944 {
 945     switch (type)
 946     {
 947 #define _x(x) case (x): return #x
 948         _x(CMSG_DATA);
 949         _x(CMSG_SIGNED);
 950         _x(CMSG_ENVELOPED);
 951         _x(CMSG_SIGNED_AND_ENVELOPED);
 952         _x(CMSG_HASHED);
 953         _x(CMSG_ENCRYPTED);
 954 #undef _x
 955         default:
 956             return wine_dbg_sprintf("unknown (%d)", type);
 957     }
 958 }
 959
 960 HCRYPTMSG WINAPI CryptMsgOpenToEncode(DWORD dwMsgEncodingType, DWORD dwFlags,
 961  DWORD dwMsgType, const void *pvMsgEncodeInfo, LPSTR pszInnerContentObjID,
 962  PCMSG_STREAM_INFO pStreamInfo)
 963 {
 964     HCRYPTMSG msg = NULL;
 965
 966     TRACE("(%08x, %08x, %08x, %p, %s, %p)\n", dwMsgEncodingType, dwFlags,
 967      dwMsgType, pvMsgEncodeInfo, debugstr_a(pszInnerContentObjID), pStreamInfo);
 968
 969     if (GET_CMSG_ENCODING_TYPE(dwMsgEncodingType) != PKCS_7_ASN_ENCODING)
 970     {
 971         SetLastError(E_INVALIDARG);
 972         return NULL;
 973     }
 974     switch (dwMsgType)
 975     {
 976     case CMSG_DATA:
 977         msg = CDataEncodeMsg_Open(dwFlags, pvMsgEncodeInfo,
 978          pszInnerContentObjID, pStreamInfo);
 979         break;
 980     case CMSG_HASHED:
 981         msg = CHashEncodeMsg_Open(dwFlags, pvMsgEncodeInfo,
 982          pszInnerContentObjID, pStreamInfo);
 983         break;
 984     case CMSG_SIGNED:
 985         msg = CSignedEncodeMsg_Open(dwFlags, pvMsgEncodeInfo,
 986          pszInnerContentObjID, pStreamInfo);
 987         break;
 988     case CMSG_ENVELOPED:
 989         FIXME("unimplemented for type %s\n", MSG_TYPE_STR(dwMsgType));
 990         break;
 991     case CMSG_SIGNED_AND_ENVELOPED:
 992     case CMSG_ENCRYPTED:
 993         /* defined but invalid, fall through */
 994     default:
 995         SetLastError(CRYPT_E_INVALID_MSG_TYPE);
 996     }
 997     return msg;
 998 }
 999
1000 typedef struct _CDecodeMsg
1001 {
1002     CryptMsgBase           base;
1003     DWORD                  type;
1004     HCRYPTPROV             crypt_prov;
1005     HCRYPTHASH             hash;
1006     CRYPT_DATA_BLOB        msg_data;
1007     PCONTEXT_PROPERTY_LIST properties;
1008 } CDecodeMsg;
1009
1010 static void CDecodeMsg_Close(HCRYPTMSG hCryptMsg)
1011 {
1012     CDecodeMsg *msg = (CDecodeMsg *)hCryptMsg;
1013
1014     if (msg->base.open_flags & CMSG_CRYPT_RELEASE_CONTEXT_FLAG)
1015         CryptReleaseContext(msg->crypt_prov, 0);
1016     CryptDestroyHash(msg->hash);
1017     CryptMemFree(msg->msg_data.pbData);
1018     ContextPropertyList_Free(msg->properties);
1019 }
1020
1021 static BOOL CDecodeMsg_CopyData(CDecodeMsg *msg, const BYTE *pbData,
1022  DWORD cbData)
1023 {
1024     BOOL ret = TRUE;
1025
1026     if (cbData)
1027     {
1028         if (msg->msg_data.cbData)
1029             msg->msg_data.pbData = CryptMemRealloc(msg->msg_data.pbData,
1030              msg->msg_data.cbData + cbData);
1031         else
1032             msg->msg_data.pbData = CryptMemAlloc(cbData);
1033         if (msg->msg_data.pbData)
1034         {
1035             memcpy(msg->msg_data.pbData + msg->msg_data.cbData, pbData, cbData);
1036             msg->msg_data.cbData += cbData;
1037         }
1038         else
1039             ret = FALSE;
1040     }
1041     return ret;
1042 }
1043
1044 static BOOL CDecodeMsg_DecodeDataContent(CDecodeMsg *msg, CRYPT_DER_BLOB *blob)
1045 {
1046     BOOL ret;
1047     CRYPT_DATA_BLOB *data;
1048     DWORD size;
1049
1050     ret = CryptDecodeObjectEx(X509_ASN_ENCODING, X509_OCTET_STRING,
1051      blob->pbData, blob->cbData, CRYPT_DECODE_ALLOC_FLAG, NULL, (LPBYTE)&data,
1052      &size);
1053     if (ret)
1054     {
1055         ret = ContextPropertyList_SetProperty(msg->properties,
1056          CMSG_CONTENT_PARAM, data->pbData, data->cbData);
1057         LocalFree(data);
1058     }
1059     return ret;
1060 }
1061
1062 static void CDecodeMsg_SaveAlgorithmID(CDecodeMsg *msg, DWORD param,
1063  const CRYPT_ALGORITHM_IDENTIFIER *id)
1064 {
1065     static const BYTE nullParams[] = { ASN_NULL, 0 };
1066     CRYPT_ALGORITHM_IDENTIFIER *copy;
1067     DWORD len = sizeof(CRYPT_ALGORITHM_IDENTIFIER);
1068
1069     /* Linearize algorithm id */
1070     len += strlen(id->pszObjId) + 1;
1071     len += id->Parameters.cbData;
1072     copy = CryptMemAlloc(len);
1073     if (copy)
1074     {
1075         copy->pszObjId =
1076          (LPSTR)((BYTE *)copy + sizeof(CRYPT_ALGORITHM_IDENTIFIER));
1077         strcpy(copy->pszObjId, id->pszObjId);
1078         copy->Parameters.pbData = (BYTE *)copy->pszObjId + strlen(id->pszObjId)
1079          + 1;
1080         /* Trick:  omit NULL parameters */
1081         if (id->Parameters.cbData == sizeof(nullParams) &&
1082          !memcmp(id->Parameters.pbData, nullParams, sizeof(nullParams)))
1083         {
1084             copy->Parameters.cbData = 0;
1085             len -= sizeof(nullParams);
1086         }
1087         else
1088             copy->Parameters.cbData = id->Parameters.cbData;
1089         if (copy->Parameters.cbData)
1090             memcpy(copy->Parameters.pbData, id->Parameters.pbData,
1091              id->Parameters.cbData);
1092         ContextPropertyList_SetProperty(msg->properties, param, (BYTE *)copy,
1093          len);
1094         CryptMemFree(copy);
1095     }
1096 }
1097
1098 static inline void CRYPT_FixUpAlgorithmID(CRYPT_ALGORITHM_IDENTIFIER *id)
1099 {
1100     id->pszObjId = (LPSTR)((BYTE *)id + sizeof(CRYPT_ALGORITHM_IDENTIFIER));
1101     id->Parameters.pbData = (BYTE *)id->pszObjId + strlen(id->pszObjId) + 1;
1102 }
1103
1104 static BOOL CDecodeMsg_DecodeHashedContent(CDecodeMsg *msg,
1105  CRYPT_DER_BLOB *blob)
1106 {
1107     BOOL ret;
1108     CRYPT_DIGESTED_DATA *digestedData;
1109     DWORD size;
1110
1111     ret = CRYPT_AsnDecodePKCSDigestedData(blob->pbData, blob->cbData,
1112      CRYPT_DECODE_ALLOC_FLAG, NULL, (CRYPT_DIGESTED_DATA *)&digestedData,
1113      &size);
1114     if (ret)
1115     {
1116         msg->type = CMSG_HASHED;
1117         ContextPropertyList_SetProperty(msg->properties, CMSG_VERSION_PARAM,
1118          (const BYTE *)&digestedData->version, sizeof(digestedData->version));
1119         CDecodeMsg_SaveAlgorithmID(msg, CMSG_HASH_ALGORITHM_PARAM,
1120          &digestedData->DigestAlgorithm);
1121         ContextPropertyList_SetProperty(msg->properties,
1122          CMSG_INNER_CONTENT_TYPE_PARAM,
1123          (const BYTE *)digestedData->ContentInfo.pszObjId,
1124          digestedData->ContentInfo.pszObjId ?
1125          strlen(digestedData->ContentInfo.pszObjId) + 1 : 0);
1126         if (digestedData->ContentInfo.Content.cbData)
1127             CDecodeMsg_DecodeDataContent(msg,
1128              &digestedData->ContentInfo.Content);
1129         else
1130             ContextPropertyList_SetProperty(msg->properties,
1131              CMSG_CONTENT_PARAM, NULL, 0);
1132         ContextPropertyList_SetProperty(msg->properties, CMSG_HASH_DATA_PARAM,
1133          digestedData->hash.pbData, digestedData->hash.cbData);
1134         LocalFree(digestedData);
1135     }
1136     return ret;
1137 }
1138
1139 /* Decodes the content in blob as the type given, and updates the value
1140  * (type, parameters, etc.) of msg based on what blob contains.
1141  * It doesn't just use msg's type, to allow a recursive call from an implicitly
1142  * typed message once the outer content info has been decoded.
1143  */
1144 static BOOL CDecodeMsg_DecodeContent(CDecodeMsg *msg, CRYPT_DER_BLOB *blob,
1145  DWORD type)
1146 {
1147     BOOL ret;
1148
1149     switch (type)
1150     {
1151     case CMSG_DATA:
1152         if ((ret = CDecodeMsg_DecodeDataContent(msg, blob)))
1153             msg->type = CMSG_DATA;
1154         break;
1155     case CMSG_HASHED:
1156         if ((ret = CDecodeMsg_DecodeHashedContent(msg, blob)))
1157             msg->type = CMSG_HASHED;
1158         break;
1159     case CMSG_ENVELOPED:
1160     case CMSG_SIGNED:
1161         FIXME("unimplemented for type %s\n", MSG_TYPE_STR(type));
1162         ret = TRUE;
1163         break;
1164     default:
1165     {
1166         CRYPT_CONTENT_INFO *info;
1167         DWORD size;
1168
1169         ret = CryptDecodeObjectEx(X509_ASN_ENCODING, PKCS_CONTENT_INFO,
1170          msg->msg_data.pbData, msg->msg_data.cbData, CRYPT_DECODE_ALLOC_FLAG,
1171          NULL, (LPBYTE)&info, &size);
1172         if (ret)
1173         {
1174             if (!strcmp(info->pszObjId, szOID_RSA_data))
1175                 ret = CDecodeMsg_DecodeContent(msg, &info->Content, CMSG_DATA);
1176             else if (!strcmp(info->pszObjId, szOID_RSA_digestedData))
1177                 ret = CDecodeMsg_DecodeContent(msg, &info->Content,
1178                  CMSG_HASHED);
1179             else if (!strcmp(info->pszObjId, szOID_RSA_envelopedData))
1180                 ret = CDecodeMsg_DecodeContent(msg, &info->Content,
1181                  CMSG_ENVELOPED);
1182             else if (!strcmp(info->pszObjId, szOID_RSA_signedData))
1183                 ret = CDecodeMsg_DecodeContent(msg, &info->Content,
1184                  CMSG_SIGNED);
1185             else
1186             {
1187                 SetLastError(CRYPT_E_INVALID_MSG_TYPE);
1188                 ret = FALSE;
1189             }
1190             LocalFree(info);
1191         }
1192     }
1193     }
1194     return ret;
1195 }
1196
1197 static BOOL CDecodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
1198  DWORD cbData, BOOL fFinal)
1199 {
1200     CDecodeMsg *msg = (CDecodeMsg *)hCryptMsg;
1201     BOOL ret = FALSE;
1202
1203     TRACE("(%p, %p, %d, %d)\n", hCryptMsg, pbData, cbData, fFinal);
1204
1205     if (msg->base.streamed)
1206     {
1207         ret = CDecodeMsg_CopyData(msg, pbData, cbData);
1208         FIXME("(%p, %p, %d, %d): streamed update stub\n", hCryptMsg, pbData,
1209          cbData, fFinal);
1210     }
1211     else
1212     {
1213         if (!fFinal)
1214             SetLastError(CRYPT_E_MSG_ERROR);
1215         else
1216         {
1217             ret = CDecodeMsg_CopyData(msg, pbData, cbData);
1218             if (ret)
1219                 ret = CDecodeMsg_DecodeContent(msg, &msg->msg_data, msg->type);
1220
1221         }
1222     }
1223     return ret;
1224 }
1225
1226 static BOOL CDecodeMsg_GetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
1227  DWORD dwIndex, void *pvData, DWORD *pcbData)
1228 {
1229     CDecodeMsg *msg = (CDecodeMsg *)hCryptMsg;
1230     BOOL ret = FALSE;
1231
1232     switch (dwParamType)
1233     {
1234     case CMSG_TYPE_PARAM:
1235         ret = CRYPT_CopyParam(pvData, pcbData, (const BYTE *)&msg->type,
1236          sizeof(msg->type));
1237         break;
1238     case CMSG_HASH_ALGORITHM_PARAM:
1239     {
1240         CRYPT_DATA_BLOB blob;
1241
1242         ret = ContextPropertyList_FindProperty(msg->properties, dwParamType,
1243          &blob);
1244         if (ret)
1245         {
1246             ret = CRYPT_CopyParam(pvData, pcbData, blob.pbData, blob.cbData);
1247             if (ret && pvData)
1248                 CRYPT_FixUpAlgorithmID((CRYPT_ALGORITHM_IDENTIFIER *)pvData);
1249         }
1250         else
1251             SetLastError(CRYPT_E_INVALID_MSG_TYPE);
1252         break;
1253     }
1254     case CMSG_COMPUTED_HASH_PARAM:
1255         if (!msg->hash)
1256         {
1257             CRYPT_ALGORITHM_IDENTIFIER *hashAlgoID = NULL;
1258             DWORD size = 0;
1259             ALG_ID algID = 0;
1260
1261             CryptMsgGetParam(msg, CMSG_HASH_ALGORITHM_PARAM, 0, NULL, &size);
1262             hashAlgoID = CryptMemAlloc(size);
1263             ret = CryptMsgGetParam(msg, CMSG_HASH_ALGORITHM_PARAM, 0,
1264              hashAlgoID, &size);
1265             if (ret)
1266                 algID = CertOIDToAlgId(hashAlgoID->pszObjId);
1267             ret = CryptCreateHash(msg->crypt_prov, algID, 0, 0, &msg->hash);
1268             if (ret)
1269             {
1270                 CRYPT_DATA_BLOB content;
1271
1272                 ret = ContextPropertyList_FindProperty(msg->properties,
1273                  CMSG_CONTENT_PARAM, &content);
1274                 if (ret)
1275                     ret = CryptHashData(msg->hash, content.pbData,
1276                      content.cbData, 0);
1277             }
1278             CryptMemFree(hashAlgoID);
1279         }
1280         else
1281             ret = TRUE;
1282         if (ret)
1283             ret = CryptGetHashParam(msg->hash, HP_HASHVAL, pvData, pcbData, 0);
1284         break;
1285     default:
1286     {
1287         CRYPT_DATA_BLOB blob;
1288
1289         ret = ContextPropertyList_FindProperty(msg->properties, dwParamType,
1290          &blob);
1291         if (ret)
1292             ret = CRYPT_CopyParam(pvData, pcbData, blob.pbData, blob.cbData);
1293         else
1294             SetLastError(CRYPT_E_INVALID_MSG_TYPE);
1295     }
1296     }
1297     return ret;
1298 }
1299
1300 HCRYPTMSG WINAPI CryptMsgOpenToDecode(DWORD dwMsgEncodingType, DWORD dwFlags,
1301  DWORD dwMsgType, HCRYPTPROV hCryptProv, PCERT_INFO pRecipientInfo,
1302  PCMSG_STREAM_INFO pStreamInfo)
1303 {
1304     CDecodeMsg *msg;
1305
1306     TRACE("(%08x, %08x, %08x, %08lx, %p, %p)\n", dwMsgEncodingType,
1307      dwFlags, dwMsgType, hCryptProv, pRecipientInfo, pStreamInfo);
1308
1309     if (GET_CMSG_ENCODING_TYPE(dwMsgEncodingType) != PKCS_7_ASN_ENCODING)
1310     {
1311         SetLastError(E_INVALIDARG);
1312         return NULL;
1313     }
1314     msg = CryptMemAlloc(sizeof(CDecodeMsg));
1315     if (msg)
1316     {
1317         CryptMsgBase_Init((CryptMsgBase *)msg, dwFlags, pStreamInfo,
1318          CDecodeMsg_Close, CDecodeMsg_GetParam, CDecodeMsg_Update);
1319         msg->type = dwMsgType;
1320         if (hCryptProv)
1321             msg->crypt_prov = hCryptProv;
1322         else
1323         {
1324             msg->crypt_prov = CRYPT_GetDefaultProvider();
1325             msg->base.open_flags &= ~CMSG_CRYPT_RELEASE_CONTEXT_FLAG;
1326         }
1327         msg->hash = 0;
1328         msg->msg_data.cbData = 0;
1329         msg->msg_data.pbData = NULL;
1330         msg->properties = ContextPropertyList_Create();
1331     }
1332     return msg;
1333 }
1334
1335 HCRYPTMSG WINAPI CryptMsgDuplicate(HCRYPTMSG hCryptMsg)
1336 {
1337     TRACE("(%p)\n", hCryptMsg);
1338
1339     if (hCryptMsg)
1340     {
1341         CryptMsgBase *msg = (CryptMsgBase *)hCryptMsg;
1342
1343         InterlockedIncrement(&msg->ref);
1344     }
1345     return hCryptMsg;
1346 }
1347
1348 BOOL WINAPI CryptMsgClose(HCRYPTMSG hCryptMsg)
1349 {
1350     TRACE("(%p)\n", hCryptMsg);
1351
1352     if (hCryptMsg)
1353     {
1354         CryptMsgBase *msg = (CryptMsgBase *)hCryptMsg;
1355
1356         if (InterlockedDecrement(&msg->ref) == 0)
1357         {
1358             TRACE("freeing %p\n", msg);
1359             if (msg->close)
1360                 msg->close(msg);
1361             CryptMemFree(msg);
1362         }
1363     }
1364     return TRUE;
1365 }
1366
1367 BOOL WINAPI CryptMsgUpdate(HCRYPTMSG hCryptMsg, const BYTE *pbData,
1368  DWORD cbData, BOOL fFinal)
1369 {
1370     CryptMsgBase *msg = (CryptMsgBase *)hCryptMsg;
1371     BOOL ret = FALSE;
1372
1373     TRACE("(%p, %p, %d, %d)\n", hCryptMsg, pbData, cbData, fFinal);
1374
1375     if (msg->state == MsgStateFinalized)
1376         SetLastError(CRYPT_E_MSG_ERROR);
1377     else
1378     {
1379         ret = msg->update(hCryptMsg, pbData, cbData, fFinal);
1380         msg->state = MsgStateUpdated;
1381         if (fFinal)
1382             msg->state = MsgStateFinalized;
1383     }
1384     return ret;
1385 }
1386
1387 BOOL WINAPI CryptMsgGetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
1388  DWORD dwIndex, void *pvData, DWORD *pcbData)
1389 {
1390     CryptMsgBase *msg = (CryptMsgBase *)hCryptMsg;
1391
1392     TRACE("(%p, %d, %d, %p, %p)\n", hCryptMsg, dwParamType, dwIndex,
1393      pvData, pcbData);
1394     return msg->get_param(hCryptMsg, dwParamType, dwIndex, pvData, pcbData);
1395 }