dlls/cryptdlg/main.c

   1 /*
   2  * Copyright 2008 Maarten Lankhorst
   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
  19 #define NONAMELESSUNION
  20
  21 #include "config.h"
  22
  23 #include <stdarg.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winnls.h"
  28 #include "winreg.h"
  29 #include "wincrypt.h"
  30 #include "wintrust.h"
  31 #include "winuser.h"
  32 #include "cryptdlg.h"
  33 #include "cryptuiapi.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(cryptdlg);
  37
  38 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
  39 {
  40     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
  41
  42     switch (fdwReason)
  43     {
  44         case DLL_WINE_PREATTACH:
  45             return FALSE;    /* prefer native version */
  46         case DLL_PROCESS_ATTACH:
  47             DisableThreadLibraryCalls(hinstDLL);
  48             break;
  49         case DLL_PROCESS_DETACH:
  50             break;
  51         default:
  52             break;
  53     }
  54     return TRUE;
  55 }
  56
  57 /***********************************************************************
  58  *              GetFriendlyNameOfCertA (CRYPTDLG.@)
  59  */
  60 DWORD WINAPI GetFriendlyNameOfCertA(PCCERT_CONTEXT pccert, LPSTR pchBuffer,
  61                              DWORD cchBuffer)
  62 {
  63     return CertGetNameStringA(pccert, CERT_NAME_FRIENDLY_DISPLAY_TYPE, 0, NULL,
  64      pchBuffer, cchBuffer);
  65 }
  66
  67 /***********************************************************************
  68  *              GetFriendlyNameOfCertW (CRYPTDLG.@)
  69  */
  70 DWORD WINAPI GetFriendlyNameOfCertW(PCCERT_CONTEXT pccert, LPWSTR pchBuffer,
  71                              DWORD cchBuffer)
  72 {
  73     return CertGetNameStringW(pccert, CERT_NAME_FRIENDLY_DISPLAY_TYPE, 0, NULL,
  74      pchBuffer, cchBuffer);
  75 }
  76
  77 /***********************************************************************
  78  *              CertTrustInit (CRYPTDLG.@)
  79  */
  80 HRESULT WINAPI CertTrustInit(CRYPT_PROVIDER_DATA *pProvData)
  81 {
  82     HRESULT ret = S_FALSE;
  83
  84     TRACE("(%p)\n", pProvData);
  85
  86     if (pProvData->padwTrustStepErrors &&
  87      !pProvData->padwTrustStepErrors[TRUSTERROR_STEP_FINAL_WVTINIT])
  88         ret = S_OK;
  89     TRACE("returning %08x\n", ret);
  90     return ret;
  91 }
  92
  93 /***********************************************************************
  94  *              CertTrustCertPolicy (CRYPTDLG.@)
  95  */
  96 BOOL WINAPI CertTrustCertPolicy(CRYPT_PROVIDER_DATA *pProvData, DWORD idxSigner, BOOL fCounterSignerChain, DWORD idxCounterSigner)
  97 {
  98     FIXME("(%p, %d, %s, %d)\n", pProvData, idxSigner, fCounterSignerChain ? "TRUE" : "FALSE", idxCounterSigner);
  99     return FALSE;
 100 }
 101
 102 /***********************************************************************
 103  *              CertTrustCleanup (CRYPTDLG.@)
 104  */
 105 HRESULT WINAPI CertTrustCleanup(CRYPT_PROVIDER_DATA *pProvData)
 106 {
 107     FIXME("(%p)\n", pProvData);
 108     return E_NOTIMPL;
 109 }
 110
 111 static BOOL CRYPTDLG_CheckOnlineCRL(void)
 112 {
 113     static const WCHAR policyFlagsKey[] = { 'S','o','f','t','w','a','r','e',
 114      '\\','M','i','c','r','o','s','o','f','t','\\','C','r','y','p','t','o','g',
 115      'r','a','p','h','y','\\','{','7','8','0','1','e','b','d','0','-','c','f',
 116      '4','b','-','1','1','d','0','-','8','5','1','f','-','0','0','6','0','9',
 117      '7','9','3','8','7','e','a','}',0 };
 118     static const WCHAR policyFlags[] = { 'P','o','l','i','c','y','F','l','a',
 119      'g','s',0 };
 120     HKEY key;
 121     BOOL ret = FALSE;
 122
 123     if (!RegOpenKeyExW(HKEY_LOCAL_MACHINE, policyFlagsKey, 0, KEY_READ, &key))
 124     {
 125         DWORD type, flags, size = sizeof(flags);
 126
 127         if (!RegQueryValueExW(key, policyFlags, NULL, &type, (BYTE *)&flags,
 128          &size) && type == REG_DWORD)
 129         {
 130             /* The flag values aren't defined in any header I'm aware of, but
 131              * this value is well documented on the net.
 132              */
 133             if (flags & 0x00010000)
 134                 ret = TRUE;
 135         }
 136         RegCloseKey(key);
 137     }
 138     return ret;
 139 }
 140
 141 /* Returns TRUE if pCert is not in the Disallowed system store, or FALSE if it
 142  * is.
 143  */
 144 static BOOL CRYPTDLG_IsCertAllowed(PCCERT_CONTEXT pCert)
 145 {
 146     BOOL ret;
 147     BYTE hash[20];
 148     DWORD size = sizeof(hash);
 149
 150     if ((ret = CertGetCertificateContextProperty(pCert,
 151      CERT_SIGNATURE_HASH_PROP_ID, hash, &size)))
 152     {
 153         static const WCHAR disallowedW[] =
 154          { 'D','i','s','a','l','l','o','w','e','d',0 };
 155         HCERTSTORE disallowed = CertOpenStore(CERT_STORE_PROV_SYSTEM_W,
 156          X509_ASN_ENCODING, 0, CERT_SYSTEM_STORE_CURRENT_USER, disallowedW);
 157
 158         if (disallowed)
 159         {
 160             PCCERT_CONTEXT found = CertFindCertificateInStore(disallowed,
 161              X509_ASN_ENCODING, 0, CERT_FIND_SIGNATURE_HASH, hash, NULL);
 162
 163             if (found)
 164             {
 165                 ret = FALSE;
 166                 CertFreeCertificateContext(found);
 167             }
 168             CertCloseStore(disallowed, 0);
 169         }
 170     }
 171     return ret;
 172 }
 173
 174 static DWORD CRYPTDLG_TrustStatusToConfidence(DWORD errorStatus)
 175 {
 176     DWORD confidence = 0;
 177
 178     confidence = 0;
 179     if (!(errorStatus & CERT_TRUST_IS_NOT_SIGNATURE_VALID))
 180         confidence |= CERT_CONFIDENCE_SIG;
 181     if (!(errorStatus & CERT_TRUST_IS_NOT_TIME_VALID))
 182         confidence |= CERT_CONFIDENCE_TIME;
 183     if (!(errorStatus & CERT_TRUST_IS_NOT_TIME_NESTED))
 184         confidence |= CERT_CONFIDENCE_TIMENEST;
 185     return confidence;
 186 }
 187
 188 static BOOL CRYPTDLG_CopyChain(CRYPT_PROVIDER_DATA *data,
 189  PCCERT_CHAIN_CONTEXT chain)
 190 {
 191     BOOL ret;
 192     CRYPT_PROVIDER_SGNR signer;
 193     PCERT_SIMPLE_CHAIN simpleChain = chain->rgpChain[0];
 194     DWORD i;
 195
 196     memset(&signer, 0, sizeof(signer));
 197     signer.cbStruct = sizeof(signer);
 198     ret = data->psPfns->pfnAddSgnr2Chain(data, FALSE, 0, &signer);
 199     if (ret)
 200     {
 201         CRYPT_PROVIDER_SGNR *sgnr = WTHelperGetProvSignerFromChain(data, 0,
 202          FALSE, 0);
 203
 204         if (sgnr)
 205         {
 206             sgnr->dwError = simpleChain->TrustStatus.dwErrorStatus;
 207             sgnr->pChainContext = CertDuplicateCertificateChain(chain);
 208         }
 209         else
 210             ret = FALSE;
 211         for (i = 0; ret && i < simpleChain->cElement; i++)
 212         {
 213             ret = data->psPfns->pfnAddCert2Chain(data, 0, FALSE, 0,
 214              simpleChain->rgpElement[i]->pCertContext);
 215             if (ret)
 216             {
 217                 CRYPT_PROVIDER_CERT *cert;
 218
 219                 if ((cert = WTHelperGetProvCertFromChain(sgnr, i)))
 220                 {
 221                     CERT_CHAIN_ELEMENT *element = simpleChain->rgpElement[i];
 222
 223                     cert->dwConfidence = CRYPTDLG_TrustStatusToConfidence(
 224                      element->TrustStatus.dwErrorStatus);
 225                     cert->dwError = element->TrustStatus.dwErrorStatus;
 226                     cert->pChainElement = element;
 227                 }
 228                 else
 229                     ret = FALSE;
 230             }
 231         }
 232     }
 233     return ret;
 234 }
 235
 236 static CERT_VERIFY_CERTIFICATE_TRUST *CRYPTDLG_GetVerifyData(
 237  CRYPT_PROVIDER_DATA *data)
 238 {
 239     CERT_VERIFY_CERTIFICATE_TRUST *pCert = NULL;
 240
 241     /* This should always be true, but just in case the calling function is
 242      * called directly:
 243      */
 244     if (data->pWintrustData->dwUnionChoice == WTD_CHOICE_BLOB &&
 245      data->pWintrustData->u.pBlob && data->pWintrustData->u.pBlob->cbMemObject ==
 246      sizeof(CERT_VERIFY_CERTIFICATE_TRUST) &&
 247      data->pWintrustData->u.pBlob->pbMemObject)
 248          pCert = (CERT_VERIFY_CERTIFICATE_TRUST *)
 249           data->pWintrustData->u.pBlob->pbMemObject;
 250     return pCert;
 251 }
 252
 253 static HCERTCHAINENGINE CRYPTDLG_MakeEngine(CERT_VERIFY_CERTIFICATE_TRUST *cert)
 254 {
 255     HCERTCHAINENGINE engine = NULL;
 256     HCERTSTORE root = NULL, trust = NULL;
 257     DWORD i;
 258
 259     if (cert->cRootStores)
 260     {
 261         root = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
 262          CERT_STORE_CREATE_NEW_FLAG, NULL);
 263         if (root)
 264         {
 265             for (i = 0; i < cert->cRootStores; i++)
 266                 CertAddStoreToCollection(root, cert->rghstoreRoots[i], 0, 0);
 267         }
 268     }
 269     if (cert->cTrustStores)
 270     {
 271         trust = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
 272          CERT_STORE_CREATE_NEW_FLAG, NULL);
 273         if (root)
 274         {
 275             for (i = 0; i < cert->cTrustStores; i++)
 276                 CertAddStoreToCollection(trust, cert->rghstoreTrust[i], 0, 0);
 277         }
 278     }
 279     if (cert->cRootStores || cert->cStores || cert->cTrustStores)
 280     {
 281         CERT_CHAIN_ENGINE_CONFIG config;
 282
 283         memset(&config, 0, sizeof(config));
 284         config.cbSize = sizeof(config);
 285         config.hRestrictedRoot = root;
 286         config.hRestrictedTrust = trust;
 287         config.cAdditionalStore = cert->cStores;
 288         config.rghAdditionalStore = cert->rghstoreCAs;
 289         config.hRestrictedRoot = root;
 290         CertCreateCertificateChainEngine(&config, &engine);
 291         CertCloseStore(root, 0);
 292         CertCloseStore(trust, 0);
 293     }
 294     return engine;
 295 }
 296
 297 /***********************************************************************
 298  *              CertTrustFinalPolicy (CRYPTDLG.@)
 299  */
 300 HRESULT WINAPI CertTrustFinalPolicy(CRYPT_PROVIDER_DATA *data)
 301 {
 302     BOOL ret;
 303     DWORD err = S_OK;
 304     CERT_VERIFY_CERTIFICATE_TRUST *pCert = CRYPTDLG_GetVerifyData(data);
 305
 306     TRACE("(%p)\n", data);
 307
 308     if (data->pWintrustData->dwUIChoice != WTD_UI_NONE)
 309         FIXME("unimplemented for UI choice %d\n",
 310          data->pWintrustData->dwUIChoice);
 311     if (pCert)
 312     {
 313         DWORD flags = 0;
 314         CERT_CHAIN_PARA chainPara;
 315         HCERTCHAINENGINE engine;
 316
 317         memset(&chainPara, 0, sizeof(chainPara));
 318         chainPara.cbSize = sizeof(chainPara);
 319         if (CRYPTDLG_CheckOnlineCRL())
 320             flags |= CERT_CHAIN_REVOCATION_CHECK_END_CERT;
 321         engine = CRYPTDLG_MakeEngine(pCert);
 322         GetSystemTimeAsFileTime(&data->sftSystemTime);
 323         ret = CRYPTDLG_IsCertAllowed(pCert->pccert);
 324         if (ret)
 325         {
 326             PCCERT_CHAIN_CONTEXT chain;
 327
 328             ret = CertGetCertificateChain(engine, pCert->pccert,
 329              &data->sftSystemTime, NULL, &chainPara, flags, NULL, &chain);
 330             if (ret)
 331             {
 332                 if (chain->cChain != 1)
 333                 {
 334                     FIXME("unimplemented for more than 1 simple chain\n");
 335                     err = TRUST_E_SUBJECT_FORM_UNKNOWN;
 336                     ret = FALSE;
 337                 }
 338                 else if ((ret = CRYPTDLG_CopyChain(data, chain)))
 339                 {
 340                     if (CertVerifyTimeValidity(&data->sftSystemTime,
 341                      pCert->pccert->pCertInfo))
 342                     {
 343                         ret = FALSE;
 344                         err = CERT_E_EXPIRED;
 345                     }
 346                 }
 347                 else
 348                     err = TRUST_E_SYSTEM_ERROR;
 349                 CertFreeCertificateChain(chain);
 350             }
 351             else
 352                 err = TRUST_E_SUBJECT_NOT_TRUSTED;
 353         }
 354         CertFreeCertificateChainEngine(engine);
 355     }
 356     else
 357     {
 358         ret = FALSE;
 359         err = TRUST_E_NOSIGNATURE;
 360     }
 361     /* Oddly, native doesn't set the error in the trust step error location,
 362      * probably because this action is more advisory than anything else.
 363      * Instead it stores it as the final error, but the function "succeeds" in
 364      * any case.
 365      */
 366     if (!ret)
 367         data->dwFinalError = err;
 368     TRACE("returning %d (%08x)\n", S_OK, data->dwFinalError);
 369     return S_OK;
 370 }
 371
 372 /***********************************************************************
 373  *              CertViewPropertiesA (CRYPTDLG.@)
 374  */
 375 BOOL WINAPI CertViewPropertiesA(CERT_VIEWPROPERTIES_STRUCT_A *info)
 376 {
 377     CERT_VIEWPROPERTIES_STRUCT_W infoW;
 378     LPWSTR title = NULL;
 379     BOOL ret;
 380
 381     TRACE("(%p)\n", info);
 382
 383     memcpy(&infoW, info, sizeof(infoW));
 384     if (info->szTitle)
 385     {
 386         int len = MultiByteToWideChar(CP_ACP, 0, info->szTitle, -1, NULL, 0);
 387
 388         title = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
 389         if (title)
 390         {
 391             MultiByteToWideChar(CP_ACP, 0, info->szTitle, -1, title, len);
 392             infoW.szTitle = title;
 393         }
 394         else
 395         {
 396             ret = FALSE;
 397             goto error;
 398         }
 399     }
 400     ret = CertViewPropertiesW(&infoW);
 401     HeapFree(GetProcessHeap(), 0, title);
 402 error:
 403     return ret;
 404 }
 405
 406 /***********************************************************************
 407  *              CertViewPropertiesW (CRYPTDLG.@)
 408  */
 409 BOOL WINAPI CertViewPropertiesW(CERT_VIEWPROPERTIES_STRUCT_W *info)
 410 {
 411     static GUID cert_action_verify = CERT_CERTIFICATE_ACTION_VERIFY;
 412     CERT_VERIFY_CERTIFICATE_TRUST trust;
 413     WINTRUST_BLOB_INFO blob;
 414     WINTRUST_DATA wtd;
 415     LONG err;
 416     BOOL ret;
 417
 418     TRACE("(%p)\n", info);
 419
 420     memset(&trust, 0, sizeof(trust));
 421     trust.cbSize = sizeof(trust);
 422     trust.pccert = info->pCertContext;
 423     trust.cRootStores = info->cRootStores;
 424     trust.rghstoreRoots = info->rghstoreRoots;
 425     trust.cStores = info->cStores;
 426     trust.rghstoreCAs = info->rghstoreCAs;
 427     trust.cTrustStores = info->cTrustStores;
 428     trust.rghstoreTrust = info->rghstoreTrust;
 429     memset(&blob, 0, sizeof(blob));
 430     blob.cbStruct = sizeof(blob);
 431     blob.cbMemObject = sizeof(trust);
 432     blob.pbMemObject = (BYTE *)&trust;
 433     memset(&wtd, 0, sizeof(wtd));
 434     wtd.cbStruct = sizeof(wtd);
 435     wtd.dwUIChoice = WTD_UI_NONE;
 436     wtd.dwUnionChoice = WTD_CHOICE_BLOB;
 437     wtd.u.pBlob = &blob;
 438     wtd.dwStateAction = WTD_STATEACTION_VERIFY;
 439     err = WinVerifyTrust(NULL, &cert_action_verify, &wtd);
 440     if (err == ERROR_SUCCESS)
 441     {
 442         CRYPTUI_VIEWCERTIFICATE_STRUCTW uiInfo;
 443         BOOL propsChanged = FALSE;
 444
 445         memset(&uiInfo, 0, sizeof(uiInfo));
 446         uiInfo.dwSize = sizeof(uiInfo);
 447         uiInfo.hwndParent = info->hwndParent;
 448         uiInfo.dwFlags =
 449          CRYPTUI_DISABLE_ADDTOSTORE | CRYPTUI_ENABLE_EDITPROPERTIES;
 450         uiInfo.szTitle = info->szTitle;
 451         uiInfo.pCertContext = info->pCertContext;
 452         uiInfo.cPurposes = info->cArrayPurposes;
 453         uiInfo.rgszPurposes = (LPCSTR *)info->arrayPurposes;
 454         uiInfo.u.hWVTStateData = wtd.hWVTStateData;
 455         uiInfo.fpCryptProviderDataTrustedUsage = TRUE;
 456         uiInfo.cPropSheetPages = info->cArrayPropSheetPages;
 457         uiInfo.rgPropSheetPages = info->arrayPropSheetPages;
 458         uiInfo.nStartPage = info->nStartPage;
 459         ret = CryptUIDlgViewCertificateW(&uiInfo, &propsChanged);
 460         wtd.dwStateAction = WTD_STATEACTION_CLOSE;
 461         WinVerifyTrust(NULL, &cert_action_verify, &wtd);
 462     }
 463     else
 464         ret = FALSE;
 465     return ret;
 466 }
 467
 468 #define szOID_MICROSOFT_Encryption_Key_Preference "1.3.6.1.4.1.311.16.4"
 469
 470 /***********************************************************************
 471  *              DllRegisterServer (CRYPTDLG.@)
 472  */
 473 HRESULT WINAPI DllRegisterServer(void)
 474 {
 475     static WCHAR cryptdlg[] = { 'c','r','y','p','t','d','l','g','.',
 476      'd','l','l',0 };
 477     static WCHAR wintrust[] = { 'w','i','n','t','r','u','s','t','.',
 478      'd','l','l',0 };
 479     static WCHAR certTrustInit[] = { 'C','e','r','t','T','r','u','s','t',
 480      'I','n','i','t',0 };
 481     static WCHAR wintrustCertificateTrust[] = { 'W','i','n','t','r','u','s','t',
 482      'C','e','r','t','i','f','i','c','a','t','e','T','r','u','s','t',0 };
 483     static WCHAR certTrustCertPolicy[] = { 'C','e','r','t','T','r','u','s','t',
 484      'C','e','r','t','P','o','l','i','c','y',0 };
 485     static WCHAR certTrustFinalPolicy[] = { 'C','e','r','t','T','r','u','s','t',
 486      'F','i','n','a','l','P','o','l','i','c','y',0 };
 487     static WCHAR certTrustCleanup[] = { 'C','e','r','t','T','r','u','s','t',
 488      'C','l','e','a','n','u','p',0 };
 489     static const WCHAR cryptDlg[] = { 'c','r','y','p','t','d','l','g','.',
 490        'd','l','l',0 };
 491     CRYPT_REGISTER_ACTIONID reg;
 492     GUID guid = CERT_CERTIFICATE_ACTION_VERIFY;
 493     HRESULT hr = S_OK;
 494
 495     memset(&reg, 0, sizeof(reg));
 496     reg.cbStruct = sizeof(reg);
 497     reg.sInitProvider.cbStruct = sizeof(CRYPT_TRUST_REG_ENTRY);
 498     reg.sInitProvider.pwszDLLName = cryptdlg;
 499     reg.sInitProvider.pwszFunctionName = certTrustInit;
 500     reg.sCertificateProvider.cbStruct = sizeof(CRYPT_TRUST_REG_ENTRY);
 501     reg.sCertificateProvider.pwszDLLName = wintrust;
 502     reg.sCertificateProvider.pwszFunctionName = wintrustCertificateTrust;
 503     reg.sCertificatePolicyProvider.cbStruct = sizeof(CRYPT_TRUST_REG_ENTRY);
 504     reg.sCertificatePolicyProvider.pwszDLLName = cryptdlg;
 505     reg.sCertificatePolicyProvider.pwszFunctionName = certTrustCertPolicy;
 506     reg.sFinalPolicyProvider.cbStruct = sizeof(CRYPT_TRUST_REG_ENTRY);
 507     reg.sFinalPolicyProvider.pwszDLLName = cryptdlg;
 508     reg.sFinalPolicyProvider.pwszFunctionName = certTrustFinalPolicy;
 509     reg.sCleanupProvider.cbStruct = sizeof(CRYPT_TRUST_REG_ENTRY);
 510     reg.sCleanupProvider.pwszDLLName = cryptdlg;
 511     reg.sCleanupProvider.pwszFunctionName = certTrustCleanup;
 512     if (!WintrustAddActionID(&guid, WT_ADD_ACTION_ID_RET_RESULT_FLAG, &reg))
 513         hr = GetLastError();
 514     CryptRegisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_ENCODE_OBJECT_FUNC,
 515      "1.3.6.1.4.1.311.16.1.1", cryptDlg, "EncodeAttrSequence");
 516     CryptRegisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_ENCODE_OBJECT_FUNC,
 517      szOID_MICROSOFT_Encryption_Key_Preference, cryptDlg, "EncodeRecipientID");
 518     CryptRegisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_DECODE_OBJECT_FUNC,
 519      "1.3.6.1.4.1.311.16.1.1", cryptDlg, "DecodeAttrSequence");
 520     CryptRegisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_DECODE_OBJECT_FUNC,
 521      szOID_MICROSOFT_Encryption_Key_Preference, cryptDlg, "DecodeRecipientID");
 522     CryptRegisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_FORMAT_OBJECT_FUNC,
 523      szOID_PKIX_KP_EMAIL_PROTECTION, cryptDlg, "FormatPKIXEmailProtection");
 524     CryptRegisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_FORMAT_OBJECT_FUNC,
 525      szOID_CERT_POLICIES, cryptDlg, "FormatVerisignExtension");
 526     return hr;
 527 }
 528
 529 /***********************************************************************
 530  *              DllUnregisterServer (CRYPTDLG.@)
 531  */
 532 HRESULT WINAPI DllUnregisterServer(void)
 533 {
 534     GUID guid = CERT_CERTIFICATE_ACTION_VERIFY;
 535
 536     WintrustRemoveActionID(&guid);
 537     CryptUnregisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_ENCODE_OBJECT_FUNC,
 538      "1.3.6.1.4.1.311.16.1.1");
 539     CryptUnregisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_ENCODE_OBJECT_FUNC,
 540      szOID_MICROSOFT_Encryption_Key_Preference);
 541     CryptUnregisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_DECODE_OBJECT_FUNC,
 542      "1.3.6.1.4.1.311.16.1.1");
 543     CryptUnregisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_DECODE_OBJECT_FUNC,
 544      szOID_MICROSOFT_Encryption_Key_Preference);
 545     CryptUnregisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_FORMAT_OBJECT_FUNC,
 546      szOID_PKIX_KP_EMAIL_PROTECTION);
 547     CryptUnregisterOIDFunction(X509_ASN_ENCODING, CRYPT_OID_FORMAT_OBJECT_FUNC,
 548      szOID_CERT_POLICIES);
 549     return S_OK;
 550 }