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

   1 /*
   2  * Copyright 2006 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  */
  19 #include <stdarg.h>
  20 #define NONAMELESSUNION
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "wincrypt.h"
  24 #include "wine/debug.h"
  25 #include "wine/unicode.h"
  26 #include "crypt32_private.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
  29
  30 #define DEFAULT_CYCLE_MODULUS 7
  31
  32 static HCERTCHAINENGINE CRYPT_defaultChainEngine;
  33
  34 /* This represents a subset of a certificate chain engine:  it doesn't include
  35  * the "hOther" store described by MSDN, because I'm not sure how that's used.
  36  * It also doesn't include the "hTrust" store, because I don't yet implement
  37  * CTLs or complex certificate chains.
  38  */
  39 typedef struct _CertificateChainEngine
  40 {
  41     LONG       ref;
  42     HCERTSTORE hRoot;
  43     HCERTSTORE hWorld;
  44     DWORD      dwFlags;
  45     DWORD      dwUrlRetrievalTimeout;
  46     DWORD      MaximumCachedCertificates;
  47     DWORD      CycleDetectionModulus;
  48 } CertificateChainEngine, *PCertificateChainEngine;
  49
  50 static inline void CRYPT_AddStoresToCollection(HCERTSTORE collection,
  51  DWORD cStores, HCERTSTORE *stores)
  52 {
  53     DWORD i;
  54
  55     for (i = 0; i < cStores; i++)
  56         CertAddStoreToCollection(collection, stores[i], 0, 0);
  57 }
  58
  59 static inline void CRYPT_CloseStores(DWORD cStores, HCERTSTORE *stores)
  60 {
  61     DWORD i;
  62
  63     for (i = 0; i < cStores; i++)
  64         CertCloseStore(stores[i], 0);
  65 }
  66
  67 static const WCHAR rootW[] = { 'R','o','o','t',0 };
  68
  69 static BOOL CRYPT_CheckRestrictedRoot(HCERTSTORE store)
  70 {
  71     BOOL ret = TRUE;
  72
  73     if (store)
  74     {
  75         HCERTSTORE rootStore = CertOpenSystemStoreW(0, rootW);
  76         PCCERT_CONTEXT cert = NULL, check;
  77         BYTE hash[20];
  78         DWORD size;
  79
  80         do {
  81             cert = CertEnumCertificatesInStore(store, cert);
  82             if (cert)
  83             {
  84                 size = sizeof(hash);
  85
  86                 ret = CertGetCertificateContextProperty(cert, CERT_HASH_PROP_ID,
  87                  hash, &size);
  88                 if (ret)
  89                 {
  90                     CRYPT_HASH_BLOB blob = { sizeof(hash), hash };
  91
  92                     check = CertFindCertificateInStore(rootStore,
  93                      cert->dwCertEncodingType, 0, CERT_FIND_SHA1_HASH, &blob,
  94                      NULL);
  95                     if (!check)
  96                         ret = FALSE;
  97                     else
  98                         CertFreeCertificateContext(check);
  99                 }
 100             }
 101         } while (ret && cert);
 102         if (cert)
 103             CertFreeCertificateContext(cert);
 104         CertCloseStore(rootStore, 0);
 105     }
 106     return ret;
 107 }
 108
 109 HCERTCHAINENGINE CRYPT_CreateChainEngine(HCERTSTORE root,
 110  PCERT_CHAIN_ENGINE_CONFIG pConfig)
 111 {
 112     static const WCHAR caW[] = { 'C','A',0 };
 113     static const WCHAR myW[] = { 'M','y',0 };
 114     static const WCHAR trustW[] = { 'T','r','u','s','t',0 };
 115     PCertificateChainEngine engine =
 116      CryptMemAlloc(sizeof(CertificateChainEngine));
 117
 118     if (engine)
 119     {
 120         HCERTSTORE worldStores[4];
 121
 122         engine->ref = 1;
 123         engine->hRoot = root;
 124         engine->hWorld = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
 125          CERT_STORE_CREATE_NEW_FLAG, NULL);
 126         worldStores[0] = CertDuplicateStore(engine->hRoot);
 127         worldStores[1] = CertOpenSystemStoreW(0, caW);
 128         worldStores[2] = CertOpenSystemStoreW(0, myW);
 129         worldStores[3] = CertOpenSystemStoreW(0, trustW);
 130         CRYPT_AddStoresToCollection(engine->hWorld,
 131          sizeof(worldStores) / sizeof(worldStores[0]), worldStores);
 132         CRYPT_AddStoresToCollection(engine->hWorld,
 133          pConfig->cAdditionalStore, pConfig->rghAdditionalStore);
 134         CRYPT_CloseStores(sizeof(worldStores) / sizeof(worldStores[0]),
 135          worldStores);
 136         engine->dwFlags = pConfig->dwFlags;
 137         engine->dwUrlRetrievalTimeout = pConfig->dwUrlRetrievalTimeout;
 138         engine->MaximumCachedCertificates =
 139          pConfig->MaximumCachedCertificates;
 140         if (pConfig->CycleDetectionModulus)
 141             engine->CycleDetectionModulus = pConfig->CycleDetectionModulus;
 142         else
 143             engine->CycleDetectionModulus = DEFAULT_CYCLE_MODULUS;
 144     }
 145     return (HCERTCHAINENGINE)engine;
 146 }
 147
 148 BOOL WINAPI CertCreateCertificateChainEngine(PCERT_CHAIN_ENGINE_CONFIG pConfig,
 149  HCERTCHAINENGINE *phChainEngine)
 150 {
 151     BOOL ret;
 152
 153     TRACE("(%p, %p)\n", pConfig, phChainEngine);
 154
 155     if (pConfig->cbSize != sizeof(*pConfig))
 156     {
 157         SetLastError(E_INVALIDARG);
 158         return FALSE;
 159     }
 160     *phChainEngine = NULL;
 161     ret = CRYPT_CheckRestrictedRoot(pConfig->hRestrictedRoot);
 162     if (ret)
 163     {
 164         HCERTSTORE root;
 165         HCERTCHAINENGINE engine;
 166
 167         if (pConfig->hRestrictedRoot)
 168             root = CertDuplicateStore(pConfig->hRestrictedRoot);
 169         else
 170             root = CertOpenSystemStoreW(0, rootW);
 171         engine = CRYPT_CreateChainEngine(root, pConfig);
 172         if (engine)
 173         {
 174             *phChainEngine = engine;
 175             ret = TRUE;
 176         }
 177         else
 178             ret = FALSE;
 179     }
 180     return ret;
 181 }
 182
 183 VOID WINAPI CertFreeCertificateChainEngine(HCERTCHAINENGINE hChainEngine)
 184 {
 185     PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
 186
 187     TRACE("(%p)\n", hChainEngine);
 188
 189     if (engine && InterlockedDecrement(&engine->ref) == 0)
 190     {
 191         CertCloseStore(engine->hWorld, 0);
 192         CertCloseStore(engine->hRoot, 0);
 193         CryptMemFree(engine);
 194     }
 195 }
 196
 197 static HCERTCHAINENGINE CRYPT_GetDefaultChainEngine(void)
 198 {
 199     if (!CRYPT_defaultChainEngine)
 200     {
 201         CERT_CHAIN_ENGINE_CONFIG config = { 0 };
 202         HCERTCHAINENGINE engine;
 203
 204         config.cbSize = sizeof(config);
 205         CertCreateCertificateChainEngine(&config, &engine);
 206         InterlockedCompareExchangePointer(&CRYPT_defaultChainEngine, engine,
 207          NULL);
 208         if (CRYPT_defaultChainEngine != engine)
 209             CertFreeCertificateChainEngine(engine);
 210     }
 211     return CRYPT_defaultChainEngine;
 212 }
 213
 214 void default_chain_engine_free(void)
 215 {
 216     CertFreeCertificateChainEngine(CRYPT_defaultChainEngine);
 217 }
 218
 219 typedef struct _CertificateChain
 220 {
 221     CERT_CHAIN_CONTEXT context;
 222     HCERTSTORE world;
 223     LONG ref;
 224 } CertificateChain, *PCertificateChain;
 225
 226 static inline BOOL CRYPT_IsCertificateSelfSigned(PCCERT_CONTEXT cert)
 227 {
 228     return CertCompareCertificateName(cert->dwCertEncodingType,
 229      &cert->pCertInfo->Subject, &cert->pCertInfo->Issuer);
 230 }
 231
 232 static void CRYPT_FreeChainElement(PCERT_CHAIN_ELEMENT element)
 233 {
 234     CertFreeCertificateContext(element->pCertContext);
 235     CryptMemFree(element);
 236 }
 237
 238 static void CRYPT_CheckSimpleChainForCycles(PCERT_SIMPLE_CHAIN chain)
 239 {
 240     DWORD i, j, cyclicCertIndex = 0;
 241
 242     /* O(n^2) - I don't think there's a faster way */
 243     for (i = 0; !cyclicCertIndex && i < chain->cElement; i++)
 244         for (j = i + 1; !cyclicCertIndex && j < chain->cElement; j++)
 245             if (CertCompareCertificate(X509_ASN_ENCODING,
 246              chain->rgpElement[i]->pCertContext->pCertInfo,
 247              chain->rgpElement[j]->pCertContext->pCertInfo))
 248                 cyclicCertIndex = j;
 249     if (cyclicCertIndex)
 250     {
 251         chain->rgpElement[cyclicCertIndex]->TrustStatus.dwErrorStatus
 252          |= CERT_TRUST_IS_CYCLIC;
 253         /* Release remaining certs */
 254         for (i = cyclicCertIndex + 1; i < chain->cElement; i++)
 255             CRYPT_FreeChainElement(chain->rgpElement[i]);
 256         /* Truncate chain */
 257         chain->cElement = cyclicCertIndex + 1;
 258     }
 259 }
 260
 261 /* Checks whether the chain is cyclic by examining the last element's status */
 262 static inline BOOL CRYPT_IsSimpleChainCyclic(PCERT_SIMPLE_CHAIN chain)
 263 {
 264     if (chain->cElement)
 265         return chain->rgpElement[chain->cElement - 1]->TrustStatus.dwErrorStatus
 266          & CERT_TRUST_IS_CYCLIC;
 267     else
 268         return FALSE;
 269 }
 270
 271 static inline void CRYPT_CombineTrustStatus(CERT_TRUST_STATUS *chainStatus,
 272  CERT_TRUST_STATUS *elementStatus)
 273 {
 274     /* Any error that applies to an element also applies to a chain.. */
 275     chainStatus->dwErrorStatus |= elementStatus->dwErrorStatus;
 276     /* but the bottom nibble of an element's info status doesn't apply to the
 277      * chain.
 278      */
 279     chainStatus->dwInfoStatus |= (elementStatus->dwInfoStatus & 0xfffffff0);
 280 }
 281
 282 static BOOL CRYPT_AddCertToSimpleChain(PCertificateChainEngine engine,
 283  PCERT_SIMPLE_CHAIN chain, PCCERT_CONTEXT cert, DWORD subjectInfoStatus)
 284 {
 285     BOOL ret = FALSE;
 286     PCERT_CHAIN_ELEMENT element = CryptMemAlloc(sizeof(CERT_CHAIN_ELEMENT));
 287
 288     if (element)
 289     {
 290         if (!chain->cElement)
 291             chain->rgpElement = CryptMemAlloc(sizeof(PCERT_CHAIN_ELEMENT));
 292         else
 293             chain->rgpElement = CryptMemRealloc(chain->rgpElement,
 294              (chain->cElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
 295         if (chain->rgpElement)
 296         {
 297             chain->rgpElement[chain->cElement++] = element;
 298             memset(element, 0, sizeof(CERT_CHAIN_ELEMENT));
 299             element->cbSize = sizeof(CERT_CHAIN_ELEMENT);
 300             element->pCertContext = CertDuplicateCertificateContext(cert);
 301             if (chain->cElement > 1)
 302                 chain->rgpElement[chain->cElement - 2]->TrustStatus.dwInfoStatus
 303                  = subjectInfoStatus;
 304             /* FIXME: initialize the rest of element */
 305             if (chain->cElement % engine->CycleDetectionModulus)
 306                 CRYPT_CheckSimpleChainForCycles(chain);
 307             CRYPT_CombineTrustStatus(&chain->TrustStatus,
 308              &element->TrustStatus);
 309             ret = TRUE;
 310         }
 311         else
 312             CryptMemFree(element);
 313     }
 314     return ret;
 315 }
 316
 317 static void CRYPT_FreeSimpleChain(PCERT_SIMPLE_CHAIN chain)
 318 {
 319     DWORD i;
 320
 321     for (i = 0; i < chain->cElement; i++)
 322         CRYPT_FreeChainElement(chain->rgpElement[i]);
 323     CryptMemFree(chain->rgpElement);
 324     CryptMemFree(chain);
 325 }
 326
 327 static void CRYPT_CheckTrustedStatus(HCERTSTORE hRoot,
 328  PCERT_CHAIN_ELEMENT rootElement)
 329 {
 330     BYTE hash[20];
 331     DWORD size = sizeof(hash);
 332     CRYPT_HASH_BLOB blob = { sizeof(hash), hash };
 333     PCCERT_CONTEXT trustedRoot;
 334
 335     CertGetCertificateContextProperty(rootElement->pCertContext,
 336      CERT_HASH_PROP_ID, hash, &size);
 337     trustedRoot = CertFindCertificateInStore(hRoot,
 338      rootElement->pCertContext->dwCertEncodingType, 0, CERT_FIND_SHA1_HASH,
 339      &blob, NULL);
 340     if (!trustedRoot)
 341         rootElement->TrustStatus.dwErrorStatus |=
 342          CERT_TRUST_IS_UNTRUSTED_ROOT;
 343     else
 344         CertFreeCertificateContext(trustedRoot);
 345 }
 346
 347 static void CRYPT_CheckRootCert(HCERTCHAINENGINE hRoot,
 348  PCERT_CHAIN_ELEMENT rootElement)
 349 {
 350     PCCERT_CONTEXT root = rootElement->pCertContext;
 351
 352     if (!CryptVerifyCertificateSignatureEx(0, root->dwCertEncodingType,
 353      CRYPT_VERIFY_CERT_SIGN_SUBJECT_CERT, (void *)root,
 354      CRYPT_VERIFY_CERT_SIGN_ISSUER_CERT, (void *)root, 0, NULL))
 355     {
 356         TRACE("Last certificate's signature is invalid\n");
 357         rootElement->TrustStatus.dwErrorStatus |=
 358          CERT_TRUST_IS_NOT_SIGNATURE_VALID;
 359     }
 360     CRYPT_CheckTrustedStatus(hRoot, rootElement);
 361 }
 362
 363 /* Decodes a cert's basic constraints extension (either szOID_BASIC_CONSTRAINTS
 364  * or szOID_BASIC_CONSTRAINTS2, whichever is present) into a
 365  * CERT_BASIC_CONSTRAINTS2_INFO.  If it neither extension is present, sets
 366  * constraints->fCA to defaultIfNotSpecified.
 367  * Returns FALSE if the extension is present but couldn't be decoded.
 368  */
 369 static BOOL CRYPT_DecodeBasicConstraints(PCCERT_CONTEXT cert,
 370  CERT_BASIC_CONSTRAINTS2_INFO *constraints, BOOL defaultIfNotSpecified)
 371 {
 372     BOOL ret = TRUE;
 373     PCERT_EXTENSION ext = CertFindExtension(szOID_BASIC_CONSTRAINTS,
 374      cert->pCertInfo->cExtension, cert->pCertInfo->rgExtension);
 375
 376     constraints->fPathLenConstraint = FALSE;
 377     if (ext)
 378     {
 379         CERT_BASIC_CONSTRAINTS_INFO *info;
 380         DWORD size = 0;
 381
 382         ret = CryptDecodeObjectEx(X509_ASN_ENCODING, szOID_BASIC_CONSTRAINTS,
 383          ext->Value.pbData, ext->Value.cbData, CRYPT_DECODE_ALLOC_FLAG,
 384          NULL, (LPBYTE)&info, &size);
 385         if (ret)
 386         {
 387             if (info->SubjectType.cbData == 1)
 388                 constraints->fCA =
 389                  info->SubjectType.pbData[0] & CERT_CA_SUBJECT_FLAG;
 390             LocalFree(info);
 391         }
 392     }
 393     else
 394     {
 395         ext = CertFindExtension(szOID_BASIC_CONSTRAINTS2,
 396          cert->pCertInfo->cExtension, cert->pCertInfo->rgExtension);
 397         if (ext)
 398         {
 399             DWORD size = sizeof(CERT_BASIC_CONSTRAINTS2_INFO);
 400
 401             ret = CryptDecodeObjectEx(X509_ASN_ENCODING,
 402              szOID_BASIC_CONSTRAINTS2, ext->Value.pbData, ext->Value.cbData,
 403              0, NULL, constraints, &size);
 404         }
 405         else
 406             constraints->fCA = defaultIfNotSpecified;
 407     }
 408     return ret;
 409 }
 410
 411 /* Checks element's basic constraints to see if it can act as a CA, with
 412  * remainingCAs CAs left in this chain.  Updates chainConstraints with the
 413  * element's constraints, if:
 414  * 1. chainConstraints doesn't have a path length constraint, or
 415  * 2. element's path length constraint is smaller than chainConstraints's
 416  * Sets *pathLengthConstraintViolated to TRUE if a path length violation
 417  * occurs.
 418  * Returns TRUE if the element can be a CA, and the length of the remaining
 419  * chain is valid.
 420  */
 421 static BOOL CRYPT_CheckBasicConstraintsForCA(PCCERT_CONTEXT cert,
 422  CERT_BASIC_CONSTRAINTS2_INFO *chainConstraints, DWORD remainingCAs,
 423  BOOL *pathLengthConstraintViolated)
 424 {
 425     BOOL validBasicConstraints;
 426     CERT_BASIC_CONSTRAINTS2_INFO constraints;
 427
 428     if ((validBasicConstraints = CRYPT_DecodeBasicConstraints(cert,
 429      &constraints, TRUE)))
 430     {
 431         if (!constraints.fCA)
 432         {
 433             TRACE("chain element %d can't be a CA\n", remainingCAs + 1);
 434             validBasicConstraints = FALSE;
 435         }
 436         else if (constraints.fPathLenConstraint)
 437         {
 438             /* If the element has path length constraints, they apply to the
 439              * entire remaining chain.
 440              */
 441             if (!chainConstraints->fPathLenConstraint ||
 442              constraints.dwPathLenConstraint <
 443              chainConstraints->dwPathLenConstraint)
 444             {
 445                 TRACE("setting path length constraint to %d\n",
 446                  chainConstraints->dwPathLenConstraint);
 447                 chainConstraints->fPathLenConstraint = TRUE;
 448                 chainConstraints->dwPathLenConstraint =
 449                  constraints.dwPathLenConstraint;
 450             }
 451         }
 452     }
 453     if (chainConstraints->fPathLenConstraint &&
 454      remainingCAs > chainConstraints->dwPathLenConstraint)
 455     {
 456         TRACE("remaining CAs %d exceed max path length %d\n", remainingCAs,
 457          chainConstraints->dwPathLenConstraint);
 458         validBasicConstraints = FALSE;
 459         *pathLengthConstraintViolated = TRUE;
 460     }
 461     return validBasicConstraints;
 462 }
 463
 464 static BOOL url_matches(LPCWSTR constraint, LPCWSTR name,
 465  DWORD *trustErrorStatus)
 466 {
 467     BOOL match = FALSE;
 468
 469     TRACE("%s, %s\n", debugstr_w(constraint), debugstr_w(name));
 470
 471     if (!constraint)
 472         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 473     else if (!name)
 474         ; /* no match */
 475     else if (constraint[0] == '.')
 476     {
 477         if (lstrlenW(name) > lstrlenW(constraint))
 478             match = !lstrcmpiW(name + lstrlenW(name) - lstrlenW(constraint),
 479              constraint);
 480     }
 481     else
 482         match = !lstrcmpiW(constraint, name);
 483     return match;
 484 }
 485
 486 static BOOL rfc822_name_matches(LPCWSTR constraint, LPCWSTR name,
 487  DWORD *trustErrorStatus)
 488 {
 489     BOOL match = FALSE;
 490     LPCWSTR at;
 491
 492     TRACE("%s, %s\n", debugstr_w(constraint), debugstr_w(name));
 493
 494     if (!constraint)
 495         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 496     else if (!name)
 497         ; /* no match */
 498     else if ((at = strchrW(constraint, '@')))
 499         match = !lstrcmpiW(constraint, name);
 500     else
 501     {
 502         if ((at = strchrW(name, '@')))
 503             match = url_matches(constraint, at + 1, trustErrorStatus);
 504         else
 505             match = !lstrcmpiW(constraint, name);
 506     }
 507     return match;
 508 }
 509
 510 static BOOL dns_name_matches(LPCWSTR constraint, LPCWSTR name,
 511  DWORD *trustErrorStatus)
 512 {
 513     BOOL match = FALSE;
 514
 515     TRACE("%s, %s\n", debugstr_w(constraint), debugstr_w(name));
 516
 517     if (!constraint)
 518         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 519     else if (!name)
 520         ; /* no match */
 521     else if (lstrlenW(name) >= lstrlenW(constraint))
 522         match = !lstrcmpiW(name + lstrlenW(name) - lstrlenW(constraint),
 523          constraint);
 524     else
 525         ; /* name is too short, no match */
 526     return match;
 527 }
 528
 529 static BOOL ip_address_matches(const CRYPT_DATA_BLOB *constraint,
 530  const CRYPT_DATA_BLOB *name, DWORD *trustErrorStatus)
 531 {
 532     BOOL match = FALSE;
 533
 534     TRACE("(%d, %p), (%d, %p)\n", constraint->cbData, constraint->pbData,
 535      name->cbData, name->pbData);
 536
 537     if (constraint->cbData != sizeof(DWORD) * 2)
 538         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 539     else if (name->cbData == sizeof(DWORD))
 540     {
 541         DWORD subnet, mask, addr;
 542
 543         memcpy(&subnet, constraint->pbData, sizeof(subnet));
 544         memcpy(&mask, constraint->pbData + sizeof(subnet), sizeof(mask));
 545         memcpy(&addr, name->pbData, sizeof(addr));
 546         /* These are really in big-endian order, but for equality matching we
 547          * don't need to swap to host order
 548          */
 549         match = (subnet & mask) == (addr & mask);
 550     }
 551     else
 552         ; /* name is wrong size, no match */
 553     return match;
 554 }
 555
 556 static void CRYPT_FindMatchingNameEntry(const CERT_ALT_NAME_ENTRY *constraint,
 557  const CERT_ALT_NAME_INFO *subjectName, DWORD *trustErrorStatus,
 558  DWORD errorIfFound, DWORD errorIfNotFound)
 559 {
 560     DWORD i;
 561     BOOL defined = FALSE, match = FALSE;
 562
 563     for (i = 0; i < subjectName->cAltEntry; i++)
 564     {
 565         if (subjectName->rgAltEntry[i].dwAltNameChoice ==
 566          constraint->dwAltNameChoice)
 567         {
 568             defined = TRUE;
 569             switch (constraint->dwAltNameChoice)
 570             {
 571             case CERT_ALT_NAME_RFC822_NAME:
 572                 match = rfc822_name_matches(constraint->u.pwszURL,
 573                  subjectName->rgAltEntry[i].u.pwszURL, trustErrorStatus);
 574                 break;
 575             case CERT_ALT_NAME_DNS_NAME:
 576                 match = dns_name_matches(constraint->u.pwszURL,
 577                  subjectName->rgAltEntry[i].u.pwszURL, trustErrorStatus);
 578                 break;
 579             case CERT_ALT_NAME_URL:
 580                 match = url_matches(constraint->u.pwszURL,
 581                  subjectName->rgAltEntry[i].u.pwszURL, trustErrorStatus);
 582                 break;
 583             case CERT_ALT_NAME_IP_ADDRESS:
 584                 match = ip_address_matches(&constraint->u.IPAddress,
 585                  &subjectName->rgAltEntry[i].u.IPAddress, trustErrorStatus);
 586                 break;
 587             case CERT_ALT_NAME_DIRECTORY_NAME:
 588             default:
 589                 ERR("name choice %d unsupported in this context\n",
 590                  constraint->dwAltNameChoice);
 591                 *trustErrorStatus |=
 592                  CERT_TRUST_HAS_NOT_SUPPORTED_NAME_CONSTRAINT;
 593             }
 594         }
 595     }
 596     /* Microsoft's implementation of name constraint checking appears at odds
 597      * with RFC 3280:
 598      * According to MSDN, CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT is set
 599      * when a name constraint is present, but that name form is not defined in
 600      * the end certificate.  According to RFC 3280, "if no name of the type is
 601      * in the certificate, the name is acceptable."
 602      * I follow Microsoft here.
 603      */
 604     if (!defined)
 605         *trustErrorStatus |= CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT;
 606     *trustErrorStatus |= match ? errorIfFound : errorIfNotFound;
 607 }
 608
 609 static void CRYPT_CheckNameConstraints(
 610  const CERT_NAME_CONSTRAINTS_INFO *nameConstraints, const CERT_INFO *cert,
 611  DWORD *trustErrorStatus)
 612 {
 613     /* If there aren't any existing constraints, don't bother checking */
 614     if (nameConstraints->cPermittedSubtree || nameConstraints->cExcludedSubtree)
 615     {
 616         CERT_EXTENSION *ext;
 617
 618         if ((ext = CertFindExtension(szOID_SUBJECT_ALT_NAME, cert->cExtension,
 619          cert->rgExtension)))
 620         {
 621             CERT_ALT_NAME_INFO *subjectName;
 622             DWORD size;
 623
 624             if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_ALTERNATE_NAME,
 625              ext->Value.pbData, ext->Value.cbData,
 626              CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
 627              &subjectName, &size))
 628             {
 629                 DWORD i;
 630
 631                 for (i = 0; i < nameConstraints->cExcludedSubtree; i++)
 632                     CRYPT_FindMatchingNameEntry(
 633                      &nameConstraints->rgExcludedSubtree[i].Base, subjectName,
 634                      trustErrorStatus,
 635                      CERT_TRUST_HAS_EXCLUDED_NAME_CONSTRAINT, 0);
 636                 for (i = 0; i < nameConstraints->cPermittedSubtree; i++)
 637                     CRYPT_FindMatchingNameEntry(
 638                      &nameConstraints->rgPermittedSubtree[i].Base, subjectName,
 639                      trustErrorStatus,
 640                      0, CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT);
 641                 LocalFree(subjectName);
 642             }
 643         }
 644         else
 645         {
 646             /* See above comment on CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT.
 647              * I match Microsoft's implementation here as well.
 648              */
 649             *trustErrorStatus |= CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT;
 650             if (nameConstraints->cPermittedSubtree)
 651                 *trustErrorStatus |=
 652                  CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT;
 653             if (nameConstraints->cExcludedSubtree)
 654                 *trustErrorStatus |=
 655                  CERT_TRUST_HAS_EXCLUDED_NAME_CONSTRAINT;
 656         }
 657     }
 658 }
 659
 660 /* Gets cert's name constraints, if any.  Free with LocalFree. */
 661 static CERT_NAME_CONSTRAINTS_INFO *CRYPT_GetNameConstraints(CERT_INFO *cert)
 662 {
 663     CERT_NAME_CONSTRAINTS_INFO *info = NULL;
 664
 665     CERT_EXTENSION *ext;
 666
 667     if ((ext = CertFindExtension(szOID_NAME_CONSTRAINTS, cert->cExtension,
 668      cert->rgExtension)))
 669     {
 670         DWORD size;
 671
 672         CryptDecodeObjectEx(X509_ASN_ENCODING, X509_NAME_CONSTRAINTS,
 673          ext->Value.pbData, ext->Value.cbData,
 674          CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL, &info,
 675          &size);
 676     }
 677     return info;
 678 }
 679
 680 static void CRYPT_CheckChainNameConstraints(PCERT_SIMPLE_CHAIN chain)
 681 {
 682     int i, j;
 683
 684     /* Microsoft's implementation appears to violate RFC 3280:  according to
 685      * MSDN, the various CERT_TRUST_*_NAME_CONSTRAINT errors are set if a CA's
 686      * name constraint is violated in the end cert.  According to RFC 3280,
 687      * the constraints should be checked against every subsequent certificate
 688      * in the chain, not just the end cert.
 689      * Microsoft's implementation also sets the name constraint errors on the
 690      * certs whose constraints were violated, not on the certs that violated
 691      * them.
 692      * In order to be error-compatible with Microsoft's implementation, while
 693      * still adhering to RFC 3280, I use a O(n ^ 2) algorithm to check name
 694      * constraints.
 695      */
 696     for (i = chain->cElement - 1; i > 0; i--)
 697     {
 698         CERT_NAME_CONSTRAINTS_INFO *nameConstraints;
 699
 700         if ((nameConstraints = CRYPT_GetNameConstraints(
 701          chain->rgpElement[i]->pCertContext->pCertInfo)))
 702         {
 703             for (j = i - 1; j >= 0; j--)
 704             {
 705                 DWORD errorStatus = 0;
 706
 707                 /* According to RFC 3280, self-signed certs don't have name
 708                  * constraints checked unless they're the end cert.
 709                  */
 710                 if (j == 0 || !CRYPT_IsCertificateSelfSigned(
 711                  chain->rgpElement[j]->pCertContext))
 712                 {
 713                     CRYPT_CheckNameConstraints(nameConstraints,
 714                      chain->rgpElement[i]->pCertContext->pCertInfo,
 715                      &errorStatus);
 716                     chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
 717                      errorStatus;
 718                 }
 719             }
 720             LocalFree(nameConstraints);
 721         }
 722     }
 723 }
 724
 725 static void CRYPT_CheckSimpleChain(PCertificateChainEngine engine,
 726  PCERT_SIMPLE_CHAIN chain, LPFILETIME time)
 727 {
 728     PCERT_CHAIN_ELEMENT rootElement = chain->rgpElement[chain->cElement - 1];
 729     int i;
 730     BOOL pathLengthConstraintViolated = FALSE;
 731     CERT_BASIC_CONSTRAINTS2_INFO constraints = { TRUE, FALSE, 0 };
 732
 733     for (i = chain->cElement - 1; i >= 0; i--)
 734     {
 735         if (CertVerifyTimeValidity(time,
 736          chain->rgpElement[i]->pCertContext->pCertInfo) != 0)
 737             chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
 738              CERT_TRUST_IS_NOT_TIME_VALID;
 739         if (i != 0)
 740         {
 741             /* Check the signature of the cert this issued */
 742             if (!CryptVerifyCertificateSignatureEx(0, X509_ASN_ENCODING,
 743              CRYPT_VERIFY_CERT_SIGN_SUBJECT_CERT,
 744              (void *)chain->rgpElement[i - 1]->pCertContext,
 745              CRYPT_VERIFY_CERT_SIGN_ISSUER_CERT,
 746              (void *)chain->rgpElement[i]->pCertContext, 0, NULL))
 747                 chain->rgpElement[i - 1]->TrustStatus.dwErrorStatus |=
 748                  CERT_TRUST_IS_NOT_SIGNATURE_VALID;
 749             /* Once a path length constraint has been violated, every remaining
 750              * CA cert's basic constraints is considered invalid.
 751              */
 752             if (pathLengthConstraintViolated)
 753                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
 754                  CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
 755             else if (!CRYPT_CheckBasicConstraintsForCA(
 756              chain->rgpElement[i]->pCertContext, &constraints, i - 1,
 757              &pathLengthConstraintViolated))
 758                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
 759                  CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
 760             else if (constraints.fPathLenConstraint &&
 761              constraints.dwPathLenConstraint)
 762             {
 763                 /* This one's valid - decrement max length */
 764                 constraints.dwPathLenConstraint--;
 765             }
 766         }
 767         /* FIXME: check valid usages */
 768         CRYPT_CombineTrustStatus(&chain->TrustStatus,
 769          &chain->rgpElement[i]->TrustStatus);
 770     }
 771     CRYPT_CheckChainNameConstraints(chain);
 772     if (CRYPT_IsCertificateSelfSigned(rootElement->pCertContext))
 773     {
 774         rootElement->TrustStatus.dwInfoStatus |=
 775          CERT_TRUST_IS_SELF_SIGNED | CERT_TRUST_HAS_NAME_MATCH_ISSUER;
 776         CRYPT_CheckRootCert(engine->hRoot, rootElement);
 777     }
 778     /* FIXME: check revocation of every cert with CertVerifyRevocation */
 779     CRYPT_CombineTrustStatus(&chain->TrustStatus, &rootElement->TrustStatus);
 780 }
 781
 782 static PCCERT_CONTEXT CRYPT_GetIssuer(HCERTSTORE store, PCCERT_CONTEXT subject,
 783  PCCERT_CONTEXT prevIssuer, DWORD *infoStatus)
 784 {
 785     PCCERT_CONTEXT issuer = NULL;
 786     PCERT_EXTENSION ext;
 787     DWORD size;
 788
 789     *infoStatus = 0;
 790     if ((ext = CertFindExtension(szOID_AUTHORITY_KEY_IDENTIFIER,
 791      subject->pCertInfo->cExtension, subject->pCertInfo->rgExtension)))
 792     {
 793         CERT_AUTHORITY_KEY_ID_INFO *info;
 794         BOOL ret;
 795
 796         ret = CryptDecodeObjectEx(subject->dwCertEncodingType,
 797          X509_AUTHORITY_KEY_ID, ext->Value.pbData, ext->Value.cbData,
 798          CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
 799          &info, &size);
 800         if (ret)
 801         {
 802             CERT_ID id;
 803
 804             if (info->CertIssuer.cbData && info->CertSerialNumber.cbData)
 805             {
 806                 id.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
 807                 memcpy(&id.u.IssuerSerialNumber.Issuer, &info->CertIssuer,
 808                  sizeof(CERT_NAME_BLOB));
 809                 memcpy(&id.u.IssuerSerialNumber.SerialNumber,
 810                  &info->CertSerialNumber, sizeof(CRYPT_INTEGER_BLOB));
 811                 issuer = CertFindCertificateInStore(store,
 812                  subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
 813                  prevIssuer);
 814                 if (issuer)
 815                     *infoStatus = CERT_TRUST_HAS_EXACT_MATCH_ISSUER;
 816             }
 817             else if (info->KeyId.cbData)
 818             {
 819                 id.dwIdChoice = CERT_ID_KEY_IDENTIFIER;
 820                 memcpy(&id.u.KeyId, &info->KeyId, sizeof(CRYPT_HASH_BLOB));
 821                 issuer = CertFindCertificateInStore(store,
 822                  subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
 823                  prevIssuer);
 824                 if (issuer)
 825                     *infoStatus = CERT_TRUST_HAS_KEY_MATCH_ISSUER;
 826             }
 827             LocalFree(info);
 828         }
 829     }
 830     else if ((ext = CertFindExtension(szOID_AUTHORITY_KEY_IDENTIFIER2,
 831      subject->pCertInfo->cExtension, subject->pCertInfo->rgExtension)))
 832     {
 833         CERT_AUTHORITY_KEY_ID2_INFO *info;
 834         BOOL ret;
 835
 836         ret = CryptDecodeObjectEx(subject->dwCertEncodingType,
 837          X509_AUTHORITY_KEY_ID2, ext->Value.pbData, ext->Value.cbData,
 838          CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
 839          &info, &size);
 840         if (ret)
 841         {
 842             CERT_ID id;
 843
 844             if (info->AuthorityCertIssuer.cAltEntry &&
 845              info->AuthorityCertSerialNumber.cbData)
 846             {
 847                 PCERT_ALT_NAME_ENTRY directoryName = NULL;
 848                 DWORD i;
 849
 850                 for (i = 0; !directoryName &&
 851                  i < info->AuthorityCertIssuer.cAltEntry; i++)
 852                     if (info->AuthorityCertIssuer.rgAltEntry[i].dwAltNameChoice
 853                      == CERT_ALT_NAME_DIRECTORY_NAME)
 854                         directoryName =
 855                          &info->AuthorityCertIssuer.rgAltEntry[i];
 856                 if (directoryName)
 857                 {
 858                     id.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
 859                     memcpy(&id.u.IssuerSerialNumber.Issuer,
 860                      &directoryName->u.DirectoryName, sizeof(CERT_NAME_BLOB));
 861                     memcpy(&id.u.IssuerSerialNumber.SerialNumber,
 862                      &info->AuthorityCertSerialNumber,
 863                      sizeof(CRYPT_INTEGER_BLOB));
 864                     issuer = CertFindCertificateInStore(store,
 865                      subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
 866                      prevIssuer);
 867                     if (issuer)
 868                         *infoStatus = CERT_TRUST_HAS_EXACT_MATCH_ISSUER;
 869                 }
 870                 else
 871                     FIXME("no supported name type in authority key id2\n");
 872             }
 873             else if (info->KeyId.cbData)
 874             {
 875                 id.dwIdChoice = CERT_ID_KEY_IDENTIFIER;
 876                 memcpy(&id.u.KeyId, &info->KeyId, sizeof(CRYPT_HASH_BLOB));
 877                 issuer = CertFindCertificateInStore(store,
 878                  subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
 879                  prevIssuer);
 880                 if (issuer)
 881                     *infoStatus = CERT_TRUST_HAS_KEY_MATCH_ISSUER;
 882             }
 883             LocalFree(info);
 884         }
 885     }
 886     else
 887     {
 888         issuer = CertFindCertificateInStore(store,
 889          subject->dwCertEncodingType, 0, CERT_FIND_SUBJECT_NAME,
 890          &subject->pCertInfo->Issuer, prevIssuer);
 891         if (issuer)
 892             *infoStatus = CERT_TRUST_HAS_NAME_MATCH_ISSUER;
 893     }
 894     return issuer;
 895 }
 896
 897 /* Builds a simple chain by finding an issuer for the last cert in the chain,
 898  * until reaching a self-signed cert, or until no issuer can be found.
 899  */
 900 static BOOL CRYPT_BuildSimpleChain(PCertificateChainEngine engine,
 901  HCERTSTORE world, PCERT_SIMPLE_CHAIN chain)
 902 {
 903     BOOL ret = TRUE;
 904     PCCERT_CONTEXT cert = chain->rgpElement[chain->cElement - 1]->pCertContext;
 905
 906     while (ret && !CRYPT_IsSimpleChainCyclic(chain) &&
 907      !CRYPT_IsCertificateSelfSigned(cert))
 908     {
 909         DWORD infoStatus;
 910         PCCERT_CONTEXT issuer = CRYPT_GetIssuer(world, cert, NULL, &infoStatus);
 911
 912         if (issuer)
 913         {
 914             ret = CRYPT_AddCertToSimpleChain(engine, chain, issuer, infoStatus);
 915             cert = issuer;
 916         }
 917         else
 918         {
 919             TRACE("Couldn't find issuer, halting chain creation\n");
 920             break;
 921         }
 922     }
 923     return ret;
 924 }
 925
 926 static BOOL CRYPT_GetSimpleChainForCert(PCertificateChainEngine engine,
 927  HCERTSTORE world, PCCERT_CONTEXT cert, LPFILETIME pTime,
 928  PCERT_SIMPLE_CHAIN *ppChain)
 929 {
 930     BOOL ret = FALSE;
 931     PCERT_SIMPLE_CHAIN chain;
 932
 933     TRACE("(%p, %p, %p, %p)\n", engine, world, cert, pTime);
 934
 935     chain = CryptMemAlloc(sizeof(CERT_SIMPLE_CHAIN));
 936     if (chain)
 937     {
 938         memset(chain, 0, sizeof(CERT_SIMPLE_CHAIN));
 939         chain->cbSize = sizeof(CERT_SIMPLE_CHAIN);
 940         ret = CRYPT_AddCertToSimpleChain(engine, chain, cert, 0);
 941         if (ret)
 942         {
 943             ret = CRYPT_BuildSimpleChain(engine, world, chain);
 944             if (ret)
 945                 CRYPT_CheckSimpleChain(engine, chain, pTime);
 946         }
 947         if (!ret)
 948         {
 949             CRYPT_FreeSimpleChain(chain);
 950             chain = NULL;
 951         }
 952         *ppChain = chain;
 953     }
 954     return ret;
 955 }
 956
 957 static BOOL CRYPT_BuildCandidateChainFromCert(HCERTCHAINENGINE hChainEngine,
 958  PCCERT_CONTEXT cert, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
 959  PCertificateChain *ppChain)
 960 {
 961     PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
 962     PCERT_SIMPLE_CHAIN simpleChain = NULL;
 963     HCERTSTORE world;
 964     BOOL ret;
 965
 966     world = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
 967      CERT_STORE_CREATE_NEW_FLAG, NULL);
 968     CertAddStoreToCollection(world, engine->hWorld, 0, 0);
 969     if (hAdditionalStore)
 970         CertAddStoreToCollection(world, hAdditionalStore, 0, 0);
 971     /* FIXME: only simple chains are supported for now, as CTLs aren't
 972      * supported yet.
 973      */
 974     if ((ret = CRYPT_GetSimpleChainForCert(engine, world, cert, pTime,
 975      &simpleChain)))
 976     {
 977         PCertificateChain chain = CryptMemAlloc(sizeof(CertificateChain));
 978
 979         if (chain)
 980         {
 981             chain->ref = 1;
 982             chain->world = world;
 983             chain->context.cbSize = sizeof(CERT_CHAIN_CONTEXT);
 984             memcpy(&chain->context.TrustStatus, &simpleChain->TrustStatus,
 985              sizeof(CERT_TRUST_STATUS));
 986             chain->context.cChain = 1;
 987             chain->context.rgpChain = CryptMemAlloc(sizeof(PCERT_SIMPLE_CHAIN));
 988             chain->context.rgpChain[0] = simpleChain;
 989             chain->context.cLowerQualityChainContext = 0;
 990             chain->context.rgpLowerQualityChainContext = NULL;
 991             chain->context.fHasRevocationFreshnessTime = FALSE;
 992             chain->context.dwRevocationFreshnessTime = 0;
 993         }
 994         else
 995             ret = FALSE;
 996         *ppChain = chain;
 997     }
 998     return ret;
 999 }
1000
1001 /* Makes and returns a copy of chain, up to and including element iElement. */
1002 static PCERT_SIMPLE_CHAIN CRYPT_CopySimpleChainToElement(
1003  PCERT_SIMPLE_CHAIN chain, DWORD iElement)
1004 {
1005     PCERT_SIMPLE_CHAIN copy = CryptMemAlloc(sizeof(CERT_SIMPLE_CHAIN));
1006
1007     if (copy)
1008     {
1009         memset(copy, 0, sizeof(CERT_SIMPLE_CHAIN));
1010         copy->cbSize = sizeof(CERT_SIMPLE_CHAIN);
1011         copy->rgpElement =
1012          CryptMemAlloc((iElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
1013         if (copy->rgpElement)
1014         {
1015             DWORD i;
1016             BOOL ret = TRUE;
1017
1018             memset(copy->rgpElement, 0,
1019              (iElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
1020             for (i = 0; ret && i <= iElement; i++)
1021             {
1022                 PCERT_CHAIN_ELEMENT element =
1023                  CryptMemAlloc(sizeof(CERT_CHAIN_ELEMENT));
1024
1025                 if (element)
1026                 {
1027                     memcpy(element, chain->rgpElement[i],
1028                      sizeof(CERT_CHAIN_ELEMENT));
1029                     element->pCertContext = CertDuplicateCertificateContext(
1030                      chain->rgpElement[i]->pCertContext);
1031                     /* Reset the trust status of the copied element, it'll get
1032                      * rechecked after the new chain is done.
1033                      */
1034                     memset(&element->TrustStatus, 0, sizeof(CERT_TRUST_STATUS));
1035                     copy->rgpElement[copy->cElement++] = element;
1036                 }
1037                 else
1038                     ret = FALSE;
1039             }
1040             if (!ret)
1041             {
1042                 for (i = 0; i <= iElement; i++)
1043                     CryptMemFree(copy->rgpElement[i]);
1044                 CryptMemFree(copy->rgpElement);
1045                 CryptMemFree(copy);
1046                 copy = NULL;
1047             }
1048         }
1049         else
1050         {
1051             CryptMemFree(copy);
1052             copy = NULL;
1053         }
1054     }
1055     return copy;
1056 }
1057
1058 static void CRYPT_FreeLowerQualityChains(PCertificateChain chain)
1059 {
1060     DWORD i;
1061
1062     for (i = 0; i < chain->context.cLowerQualityChainContext; i++)
1063         CertFreeCertificateChain(chain->context.rgpLowerQualityChainContext[i]);
1064     CryptMemFree(chain->context.rgpLowerQualityChainContext);
1065 }
1066
1067 static void CRYPT_FreeChainContext(PCertificateChain chain)
1068 {
1069     DWORD i;
1070
1071     CRYPT_FreeLowerQualityChains(chain);
1072     for (i = 0; i < chain->context.cChain; i++)
1073         CRYPT_FreeSimpleChain(chain->context.rgpChain[i]);
1074     CryptMemFree(chain->context.rgpChain);
1075     CertCloseStore(chain->world, 0);
1076     CryptMemFree(chain);
1077 }
1078
1079 /* Makes and returns a copy of chain, up to and including element iElement of
1080  * simple chain iChain.
1081  */
1082 static PCertificateChain CRYPT_CopyChainToElement(PCertificateChain chain,
1083  DWORD iChain, DWORD iElement)
1084 {
1085     PCertificateChain copy = CryptMemAlloc(sizeof(CertificateChain));
1086
1087     if (copy)
1088     {
1089         copy->ref = 1;
1090         copy->world = CertDuplicateStore(chain->world);
1091         copy->context.cbSize = sizeof(CERT_CHAIN_CONTEXT);
1092         /* Leave the trust status of the copied chain unset, it'll get
1093          * rechecked after the new chain is done.
1094          */
1095         memset(&copy->context.TrustStatus, 0, sizeof(CERT_TRUST_STATUS));
1096         copy->context.cLowerQualityChainContext = 0;
1097         copy->context.rgpLowerQualityChainContext = NULL;
1098         copy->context.fHasRevocationFreshnessTime = FALSE;
1099         copy->context.dwRevocationFreshnessTime = 0;
1100         copy->context.rgpChain = CryptMemAlloc(
1101          (iChain + 1) * sizeof(PCERT_SIMPLE_CHAIN));
1102         if (copy->context.rgpChain)
1103         {
1104             BOOL ret = TRUE;
1105             DWORD i;
1106
1107             memset(copy->context.rgpChain, 0,
1108              (iChain + 1) * sizeof(PCERT_SIMPLE_CHAIN));
1109             if (iChain)
1110             {
1111                 for (i = 0; ret && iChain && i < iChain - 1; i++)
1112                 {
1113                     copy->context.rgpChain[i] =
1114                      CRYPT_CopySimpleChainToElement(chain->context.rgpChain[i],
1115                      chain->context.rgpChain[i]->cElement - 1);
1116                     if (!copy->context.rgpChain[i])
1117                         ret = FALSE;
1118                 }
1119             }
1120             else
1121                 i = 0;
1122             if (ret)
1123             {
1124                 copy->context.rgpChain[i] =
1125                  CRYPT_CopySimpleChainToElement(chain->context.rgpChain[i],
1126                  iElement);
1127                 if (!copy->context.rgpChain[i])
1128                     ret = FALSE;
1129             }
1130             if (!ret)
1131             {
1132                 CRYPT_FreeChainContext(copy);
1133                 copy = NULL;
1134             }
1135             else
1136                 copy->context.cChain = iChain + 1;
1137         }
1138         else
1139         {
1140             CryptMemFree(copy);
1141             copy = NULL;
1142         }
1143     }
1144     return copy;
1145 }
1146
1147 static PCertificateChain CRYPT_BuildAlternateContextFromChain(
1148  HCERTCHAINENGINE hChainEngine, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
1149  PCertificateChain chain)
1150 {
1151     PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
1152     PCertificateChain alternate;
1153
1154     TRACE("(%p, %p, %p, %p)\n", hChainEngine, pTime, hAdditionalStore, chain);
1155
1156     /* Always start with the last "lower quality" chain to ensure a consistent
1157      * order of alternate creation:
1158      */
1159     if (chain->context.cLowerQualityChainContext)
1160         chain = (PCertificateChain)chain->context.rgpLowerQualityChainContext[
1161          chain->context.cLowerQualityChainContext - 1];
1162     /* A chain with only one element can't have any alternates */
1163     if (chain->context.cChain <= 1 && chain->context.rgpChain[0]->cElement <= 1)
1164         alternate = NULL;
1165     else
1166     {
1167         DWORD i, j, infoStatus;
1168         PCCERT_CONTEXT alternateIssuer = NULL;
1169
1170         alternate = NULL;
1171         for (i = 0; !alternateIssuer && i < chain->context.cChain; i++)
1172             for (j = 0; !alternateIssuer &&
1173              j < chain->context.rgpChain[i]->cElement - 1; j++)
1174             {
1175                 PCCERT_CONTEXT subject =
1176                  chain->context.rgpChain[i]->rgpElement[j]->pCertContext;
1177                 PCCERT_CONTEXT prevIssuer = CertDuplicateCertificateContext(
1178                  chain->context.rgpChain[i]->rgpElement[j + 1]->pCertContext);
1179
1180                 alternateIssuer = CRYPT_GetIssuer(prevIssuer->hCertStore,
1181                  subject, prevIssuer, &infoStatus);
1182             }
1183         if (alternateIssuer)
1184         {
1185             i--;
1186             j--;
1187             alternate = CRYPT_CopyChainToElement(chain, i, j);
1188             if (alternate)
1189             {
1190                 BOOL ret = CRYPT_AddCertToSimpleChain(engine,
1191                  alternate->context.rgpChain[i], alternateIssuer, infoStatus);
1192
1193                 if (ret)
1194                 {
1195                     ret = CRYPT_BuildSimpleChain(engine, alternate->world,
1196                      alternate->context.rgpChain[i]);
1197                     if (ret)
1198                         CRYPT_CheckSimpleChain(engine,
1199                          alternate->context.rgpChain[i], pTime);
1200                     CRYPT_CombineTrustStatus(&alternate->context.TrustStatus,
1201                      &alternate->context.rgpChain[i]->TrustStatus);
1202                 }
1203                 if (!ret)
1204                 {
1205                     CRYPT_FreeChainContext(alternate);
1206                     alternate = NULL;
1207                 }
1208             }
1209         }
1210     }
1211     TRACE("%p\n", alternate);
1212     return alternate;
1213 }
1214
1215 #define CHAIN_QUALITY_SIGNATURE_VALID 8
1216 #define CHAIN_QUALITY_TIME_VALID      4
1217 #define CHAIN_QUALITY_COMPLETE_CHAIN  2
1218 #define CHAIN_QUALITY_TRUSTED_ROOT    1
1219
1220 #define CHAIN_QUALITY_HIGHEST \
1221  CHAIN_QUALITY_SIGNATURE_VALID | CHAIN_QUALITY_TIME_VALID | \
1222  CHAIN_QUALITY_COMPLETE_CHAIN | CHAIN_QUALITY_TRUSTED_ROOT
1223
1224 #define IS_TRUST_ERROR_SET(TrustStatus, bits) \
1225  (TrustStatus)->dwErrorStatus & (bits)
1226
1227 static DWORD CRYPT_ChainQuality(PCertificateChain chain)
1228 {
1229     DWORD quality = CHAIN_QUALITY_HIGHEST;
1230
1231     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1232      CERT_TRUST_IS_UNTRUSTED_ROOT))
1233         quality &= ~CHAIN_QUALITY_TRUSTED_ROOT;
1234     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1235      CERT_TRUST_IS_PARTIAL_CHAIN))
1236     if (chain->context.TrustStatus.dwErrorStatus & CERT_TRUST_IS_PARTIAL_CHAIN)
1237         quality &= ~CHAIN_QUALITY_COMPLETE_CHAIN;
1238     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1239      CERT_TRUST_IS_NOT_TIME_VALID | CERT_TRUST_IS_NOT_TIME_NESTED))
1240         quality &= ~CHAIN_QUALITY_TIME_VALID;
1241     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1242      CERT_TRUST_IS_NOT_SIGNATURE_VALID))
1243         quality &= ~CHAIN_QUALITY_SIGNATURE_VALID;
1244     return quality;
1245 }
1246
1247 /* Chooses the highest quality chain among chain and its "lower quality"
1248  * alternate chains.  Returns the highest quality chain, with all other
1249  * chains as lower quality chains of it.
1250  */
1251 static PCertificateChain CRYPT_ChooseHighestQualityChain(
1252  PCertificateChain chain)
1253 {
1254     DWORD i;
1255
1256     /* There are always only two chains being considered:  chain, and an
1257      * alternate at chain->rgpLowerQualityChainContext[i].  If the alternate
1258      * has a higher quality than chain, the alternate gets assigned the lower
1259      * quality contexts, with chain taking the alternate's place among the
1260      * lower quality contexts.
1261      */
1262     for (i = 0; i < chain->context.cLowerQualityChainContext; i++)
1263     {
1264         PCertificateChain alternate =
1265          (PCertificateChain)chain->context.rgpLowerQualityChainContext[i];
1266
1267         if (CRYPT_ChainQuality(alternate) > CRYPT_ChainQuality(chain))
1268         {
1269             alternate->context.cLowerQualityChainContext =
1270              chain->context.cLowerQualityChainContext;
1271             alternate->context.rgpLowerQualityChainContext =
1272              chain->context.rgpLowerQualityChainContext;
1273             alternate->context.rgpLowerQualityChainContext[i] =
1274              (PCCERT_CHAIN_CONTEXT)chain;
1275             chain = alternate;
1276         }
1277     }
1278     return chain;
1279 }
1280
1281 static BOOL CRYPT_AddAlternateChainToChain(PCertificateChain chain,
1282  PCertificateChain alternate)
1283 {
1284     BOOL ret;
1285
1286     if (chain->context.cLowerQualityChainContext)
1287         chain->context.rgpLowerQualityChainContext =
1288          CryptMemRealloc(chain->context.rgpLowerQualityChainContext,
1289          (chain->context.cLowerQualityChainContext + 1) *
1290          sizeof(PCCERT_CHAIN_CONTEXT));
1291     else
1292         chain->context.rgpLowerQualityChainContext =
1293          CryptMemAlloc(sizeof(PCCERT_CHAIN_CONTEXT));
1294     if (chain->context.rgpLowerQualityChainContext)
1295     {
1296         chain->context.rgpLowerQualityChainContext[
1297          chain->context.cLowerQualityChainContext++] =
1298          (PCCERT_CHAIN_CONTEXT)alternate;
1299         ret = TRUE;
1300     }
1301     else
1302         ret = FALSE;
1303     return ret;
1304 }
1305
1306 typedef struct _CERT_CHAIN_PARA_NO_EXTRA_FIELDS {
1307     DWORD            cbSize;
1308     CERT_USAGE_MATCH RequestedUsage;
1309 } CERT_CHAIN_PARA_NO_EXTRA_FIELDS, *PCERT_CHAIN_PARA_NO_EXTRA_FIELDS;
1310
1311 typedef struct _CERT_CHAIN_PARA_EXTRA_FIELDS {
1312     DWORD            cbSize;
1313     CERT_USAGE_MATCH RequestedUsage;
1314     CERT_USAGE_MATCH RequestedIssuancePolicy;
1315     DWORD            dwUrlRetrievalTimeout;
1316     BOOL             fCheckRevocationFreshnessTime;
1317     DWORD            dwRevocationFreshnessTime;
1318 } CERT_CHAIN_PARA_EXTRA_FIELDS, *PCERT_CHAIN_PARA_EXTRA_FIELDS;
1319
1320 BOOL WINAPI CertGetCertificateChain(HCERTCHAINENGINE hChainEngine,
1321  PCCERT_CONTEXT pCertContext, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
1322  PCERT_CHAIN_PARA pChainPara, DWORD dwFlags, LPVOID pvReserved,
1323  PCCERT_CHAIN_CONTEXT* ppChainContext)
1324 {
1325     BOOL ret;
1326     PCertificateChain chain = NULL;
1327
1328     TRACE("(%p, %p, %p, %p, %p, %08x, %p, %p)\n", hChainEngine, pCertContext,
1329      pTime, hAdditionalStore, pChainPara, dwFlags, pvReserved, ppChainContext);
1330
1331     if (ppChainContext)
1332         *ppChainContext = NULL;
1333     if (!pChainPara)
1334     {
1335         SetLastError(E_INVALIDARG);
1336         return FALSE;
1337     }
1338     if (!pCertContext->pCertInfo->SignatureAlgorithm.pszObjId)
1339     {
1340         SetLastError(ERROR_INVALID_DATA);
1341         return FALSE;
1342     }
1343     if (!hChainEngine)
1344         hChainEngine = CRYPT_GetDefaultChainEngine();
1345     /* FIXME: what about HCCE_LOCAL_MACHINE? */
1346     /* FIXME: pChainPara is for now ignored */
1347     ret = CRYPT_BuildCandidateChainFromCert(hChainEngine, pCertContext, pTime,
1348      hAdditionalStore, &chain);
1349     if (ret)
1350     {
1351         PCertificateChain alternate = NULL;
1352
1353         do {
1354             alternate = CRYPT_BuildAlternateContextFromChain(hChainEngine,
1355              pTime, hAdditionalStore, chain);
1356
1357             /* Alternate contexts are added as "lower quality" contexts of
1358              * chain, to avoid loops in alternate chain creation.
1359              * The highest-quality chain is chosen at the end.
1360              */
1361             if (alternate)
1362                 ret = CRYPT_AddAlternateChainToChain(chain, alternate);
1363         } while (ret && alternate);
1364         chain = CRYPT_ChooseHighestQualityChain(chain);
1365         if (!(dwFlags & CERT_CHAIN_RETURN_LOWER_QUALITY_CONTEXTS))
1366         {
1367             CRYPT_FreeLowerQualityChains(chain);
1368             chain->context.cLowerQualityChainContext = 0;
1369             chain->context.rgpLowerQualityChainContext = NULL;
1370         }
1371         if (ppChainContext)
1372             *ppChainContext = (PCCERT_CHAIN_CONTEXT)chain;
1373         else
1374             CertFreeCertificateChain((PCCERT_CHAIN_CONTEXT)chain);
1375     }
1376     TRACE("returning %d\n", ret);
1377     return ret;
1378 }
1379
1380 PCCERT_CHAIN_CONTEXT WINAPI CertDuplicateCertificateChain(
1381  PCCERT_CHAIN_CONTEXT pChainContext)
1382 {
1383     PCertificateChain chain = (PCertificateChain)pChainContext;
1384
1385     TRACE("(%p)\n", pChainContext);
1386
1387     if (chain)
1388         InterlockedIncrement(&chain->ref);
1389     return pChainContext;
1390 }
1391
1392 VOID WINAPI CertFreeCertificateChain(PCCERT_CHAIN_CONTEXT pChainContext)
1393 {
1394     PCertificateChain chain = (PCertificateChain)pChainContext;
1395
1396     TRACE("(%p)\n", pChainContext);
1397
1398     if (chain)
1399     {
1400         if (InterlockedDecrement(&chain->ref) == 0)
1401             CRYPT_FreeChainContext(chain);
1402     }
1403 }
1404
1405 static void find_element_with_error(PCCERT_CHAIN_CONTEXT chain, DWORD error,
1406  LONG *iChain, LONG *iElement)
1407 {
1408     DWORD i, j;
1409
1410     for (i = 0; i < chain->cChain; i++)
1411         for (j = 0; j < chain->rgpChain[i]->cElement; j++)
1412             if (chain->rgpChain[i]->rgpElement[j]->TrustStatus.dwErrorStatus &
1413              error)
1414             {
1415                 *iChain = i;
1416                 *iElement = j;
1417                 return;
1418             }
1419 }
1420
1421 static BOOL WINAPI verify_base_policy(LPCSTR szPolicyOID,
1422  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
1423  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
1424 {
1425     pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = -1;
1426     if (pChainContext->TrustStatus.dwErrorStatus &
1427      CERT_TRUST_IS_NOT_SIGNATURE_VALID)
1428     {
1429         pPolicyStatus->dwError = TRUST_E_CERT_SIGNATURE;
1430         find_element_with_error(pChainContext,
1431          CERT_TRUST_IS_NOT_SIGNATURE_VALID, &pPolicyStatus->lChainIndex,
1432          &pPolicyStatus->lElementIndex);
1433     }
1434     else if (pChainContext->TrustStatus.dwErrorStatus &
1435      CERT_TRUST_IS_UNTRUSTED_ROOT)
1436     {
1437         pPolicyStatus->dwError = CERT_E_UNTRUSTEDROOT;
1438         find_element_with_error(pChainContext,
1439          CERT_TRUST_IS_UNTRUSTED_ROOT, &pPolicyStatus->lChainIndex,
1440          &pPolicyStatus->lElementIndex);
1441     }
1442     else if (pChainContext->TrustStatus.dwErrorStatus & CERT_TRUST_IS_CYCLIC)
1443     {
1444         pPolicyStatus->dwError = CERT_E_CHAINING;
1445         find_element_with_error(pChainContext, CERT_TRUST_IS_CYCLIC,
1446          &pPolicyStatus->lChainIndex, &pPolicyStatus->lElementIndex);
1447         /* For a cyclic chain, which element is a cycle isn't meaningful */
1448         pPolicyStatus->lElementIndex = -1;
1449     }
1450     return TRUE;
1451 }
1452
1453 static BYTE msTestPubKey1[] = {
1454 0x30,0x47,0x02,0x40,0x81,0x55,0x22,0xb9,0x8a,0xa4,0x6f,0xed,0xd6,0xe7,0xd9,
1455 0x66,0x0f,0x55,0xbc,0xd7,0xcd,0xd5,0xbc,0x4e,0x40,0x02,0x21,0xa2,0xb1,0xf7,
1456 0x87,0x30,0x85,0x5e,0xd2,0xf2,0x44,0xb9,0xdc,0x9b,0x75,0xb6,0xfb,0x46,0x5f,
1457 0x42,0xb6,0x9d,0x23,0x36,0x0b,0xde,0x54,0x0f,0xcd,0xbd,0x1f,0x99,0x2a,0x10,
1458 0x58,0x11,0xcb,0x40,0xcb,0xb5,0xa7,0x41,0x02,0x03,0x01,0x00,0x01 };
1459 static BYTE msTestPubKey2[] = {
1460 0x30,0x48,0x02,0x41,0x00,0x81,0x55,0x22,0xb9,0x8a,0xa4,0x6f,0xed,0xd6,0xe7,
1461 0xd9,0x66,0x0f,0x55,0xbc,0xd7,0xcd,0xd5,0xbc,0x4e,0x40,0x02,0x21,0xa2,0xb1,
1462 0xf7,0x87,0x30,0x85,0x5e,0xd2,0xf2,0x44,0xb9,0xdc,0x9b,0x75,0xb6,0xfb,0x46,
1463 0x5f,0x42,0xb6,0x9d,0x23,0x36,0x0b,0xde,0x54,0x0f,0xcd,0xbd,0x1f,0x99,0x2a,
1464 0x10,0x58,0x11,0xcb,0x40,0xcb,0xb5,0xa7,0x41,0x02,0x03,0x01,0x00,0x01 };
1465 static BYTE msTestPubKey3[] = {
1466 0x30,0x47,0x02,0x40,0x9c,0x50,0x05,0x1d,0xe2,0x0e,0x4c,0x53,0xd8,0xd9,0xb5,
1467 0xe5,0xfd,0xe9,0xe3,0xad,0x83,0x4b,0x80,0x08,0xd9,0xdc,0xe8,0xe8,0x35,0xf8,
1468 0x11,0xf1,0xe9,0x9b,0x03,0x7a,0x65,0x64,0x76,0x35,0xce,0x38,0x2c,0xf2,0xb6,
1469 0x71,0x9e,0x06,0xd9,0xbf,0xbb,0x31,0x69,0xa3,0xf6,0x30,0xa0,0x78,0x7b,0x18,
1470 0xdd,0x50,0x4d,0x79,0x1e,0xeb,0x61,0xc1,0x02,0x03,0x01,0x00,0x01 };
1471
1472 static BOOL WINAPI verify_authenticode_policy(LPCSTR szPolicyOID,
1473  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
1474  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
1475 {
1476     BOOL ret = verify_base_policy(szPolicyOID, pChainContext, pPolicyPara,
1477      pPolicyStatus);
1478
1479     if (ret && pPolicyStatus->dwError == CERT_E_UNTRUSTEDROOT)
1480     {
1481         CERT_PUBLIC_KEY_INFO msPubKey = { { 0 } };
1482         BOOL isMSTestRoot = FALSE;
1483         PCCERT_CONTEXT failingCert =
1484          pChainContext->rgpChain[pPolicyStatus->lChainIndex]->
1485          rgpElement[pPolicyStatus->lElementIndex]->pCertContext;
1486         DWORD i;
1487         CRYPT_DATA_BLOB keyBlobs[] = {
1488          { sizeof(msTestPubKey1), msTestPubKey1 },
1489          { sizeof(msTestPubKey2), msTestPubKey2 },
1490          { sizeof(msTestPubKey3), msTestPubKey3 },
1491         };
1492
1493         /* Check whether the root is an MS test root */
1494         for (i = 0; !isMSTestRoot && i < sizeof(keyBlobs) / sizeof(keyBlobs[0]);
1495          i++)
1496         {
1497             msPubKey.PublicKey.cbData = keyBlobs[i].cbData;
1498             msPubKey.PublicKey.pbData = keyBlobs[i].pbData;
1499             if (CertComparePublicKeyInfo(
1500              X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1501              &failingCert->pCertInfo->SubjectPublicKeyInfo, &msPubKey))
1502                 isMSTestRoot = TRUE;
1503         }
1504         if (isMSTestRoot)
1505             pPolicyStatus->dwError = CERT_E_UNTRUSTEDTESTROOT;
1506     }
1507     return ret;
1508 }
1509
1510 static BOOL WINAPI verify_basic_constraints_policy(LPCSTR szPolicyOID,
1511  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
1512  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
1513 {
1514     pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = -1;
1515     if (pChainContext->TrustStatus.dwErrorStatus &
1516      CERT_TRUST_INVALID_BASIC_CONSTRAINTS)
1517     {
1518         pPolicyStatus->dwError = TRUST_E_BASIC_CONSTRAINTS;
1519         find_element_with_error(pChainContext,
1520          CERT_TRUST_INVALID_BASIC_CONSTRAINTS, &pPolicyStatus->lChainIndex,
1521          &pPolicyStatus->lElementIndex);
1522     }
1523     return TRUE;
1524 }
1525
1526 static BYTE msPubKey1[] = {
1527 0x30,0x82,0x01,0x0a,0x02,0x82,0x01,0x01,0x00,0xdf,0x08,0xba,0xe3,0x3f,0x6e,
1528 0x64,0x9b,0xf5,0x89,0xaf,0x28,0x96,0x4a,0x07,0x8f,0x1b,0x2e,0x8b,0x3e,0x1d,
1529 0xfc,0xb8,0x80,0x69,0xa3,0xa1,0xce,0xdb,0xdf,0xb0,0x8e,0x6c,0x89,0x76,0x29,
1530 0x4f,0xca,0x60,0x35,0x39,0xad,0x72,0x32,0xe0,0x0b,0xae,0x29,0x3d,0x4c,0x16,
1531 0xd9,0x4b,0x3c,0x9d,0xda,0xc5,0xd3,0xd1,0x09,0xc9,0x2c,0x6f,0xa6,0xc2,0x60,
1532 0x53,0x45,0xdd,0x4b,0xd1,0x55,0xcd,0x03,0x1c,0xd2,0x59,0x56,0x24,0xf3,0xe5,
1533 0x78,0xd8,0x07,0xcc,0xd8,0xb3,0x1f,0x90,0x3f,0xc0,0x1a,0x71,0x50,0x1d,0x2d,
1534 0xa7,0x12,0x08,0x6d,0x7c,0xb0,0x86,0x6c,0xc7,0xba,0x85,0x32,0x07,0xe1,0x61,
1535 0x6f,0xaf,0x03,0xc5,0x6d,0xe5,0xd6,0xa1,0x8f,0x36,0xf6,0xc1,0x0b,0xd1,0x3e,
1536 0x69,0x97,0x48,0x72,0xc9,0x7f,0xa4,0xc8,0xc2,0x4a,0x4c,0x7e,0xa1,0xd1,0x94,
1537 0xa6,0xd7,0xdc,0xeb,0x05,0x46,0x2e,0xb8,0x18,0xb4,0x57,0x1d,0x86,0x49,0xdb,
1538 0x69,0x4a,0x2c,0x21,0xf5,0x5e,0x0f,0x54,0x2d,0x5a,0x43,0xa9,0x7a,0x7e,0x6a,
1539 0x8e,0x50,0x4d,0x25,0x57,0xa1,0xbf,0x1b,0x15,0x05,0x43,0x7b,0x2c,0x05,0x8d,
1540 0xbd,0x3d,0x03,0x8c,0x93,0x22,0x7d,0x63,0xea,0x0a,0x57,0x05,0x06,0x0a,0xdb,
1541 0x61,0x98,0x65,0x2d,0x47,0x49,0xa8,0xe7,0xe6,0x56,0x75,0x5c,0xb8,0x64,0x08,
1542 0x63,0xa9,0x30,0x40,0x66,0xb2,0xf9,0xb6,0xe3,0x34,0xe8,0x67,0x30,0xe1,0x43,
1543 0x0b,0x87,0xff,0xc9,0xbe,0x72,0x10,0x5e,0x23,0xf0,0x9b,0xa7,0x48,0x65,0xbf,
1544 0x09,0x88,0x7b,0xcd,0x72,0xbc,0x2e,0x79,0x9b,0x7b,0x02,0x03,0x01,0x00,0x01 };
1545 static BYTE msPubKey2[] = {
1546 0x30,0x82,0x01,0x0a,0x02,0x82,0x01,0x01,0x00,0xa9,0x02,0xbd,0xc1,0x70,0xe6,
1547 0x3b,0xf2,0x4e,0x1b,0x28,0x9f,0x97,0x78,0x5e,0x30,0xea,0xa2,0xa9,0x8d,0x25,
1548 0x5f,0xf8,0xfe,0x95,0x4c,0xa3,0xb7,0xfe,0x9d,0xa2,0x20,0x3e,0x7c,0x51,0xa2,
1549 0x9b,0xa2,0x8f,0x60,0x32,0x6b,0xd1,0x42,0x64,0x79,0xee,0xac,0x76,0xc9,0x54,
1550 0xda,0xf2,0xeb,0x9c,0x86,0x1c,0x8f,0x9f,0x84,0x66,0xb3,0xc5,0x6b,0x7a,0x62,
1551 0x23,0xd6,0x1d,0x3c,0xde,0x0f,0x01,0x92,0xe8,0x96,0xc4,0xbf,0x2d,0x66,0x9a,
1552 0x9a,0x68,0x26,0x99,0xd0,0x3a,0x2c,0xbf,0x0c,0xb5,0x58,0x26,0xc1,0x46,0xe7,
1553 0x0a,0x3e,0x38,0x96,0x2c,0xa9,0x28,0x39,0xa8,0xec,0x49,0x83,0x42,0xe3,0x84,
1554 0x0f,0xbb,0x9a,0x6c,0x55,0x61,0xac,0x82,0x7c,0xa1,0x60,0x2d,0x77,0x4c,0xe9,
1555 0x99,0xb4,0x64,0x3b,0x9a,0x50,0x1c,0x31,0x08,0x24,0x14,0x9f,0xa9,0xe7,0x91,
1556 0x2b,0x18,0xe6,0x3d,0x98,0x63,0x14,0x60,0x58,0x05,0x65,0x9f,0x1d,0x37,0x52,
1557 0x87,0xf7,0xa7,0xef,0x94,0x02,0xc6,0x1b,0xd3,0xbf,0x55,0x45,0xb3,0x89,0x80,
1558 0xbf,0x3a,0xec,0x54,0x94,0x4e,0xae,0xfd,0xa7,0x7a,0x6d,0x74,0x4e,0xaf,0x18,
1559 0xcc,0x96,0x09,0x28,0x21,0x00,0x57,0x90,0x60,0x69,0x37,0xbb,0x4b,0x12,0x07,
1560 0x3c,0x56,0xff,0x5b,0xfb,0xa4,0x66,0x0a,0x08,0xa6,0xd2,0x81,0x56,0x57,0xef,
1561 0xb6,0x3b,0x5e,0x16,0x81,0x77,0x04,0xda,0xf6,0xbe,0xae,0x80,0x95,0xfe,0xb0,
1562 0xcd,0x7f,0xd6,0xa7,0x1a,0x72,0x5c,0x3c,0xca,0xbc,0xf0,0x08,0xa3,0x22,0x30,
1563 0xb3,0x06,0x85,0xc9,0xb3,0x20,0x77,0x13,0x85,0xdf,0x02,0x03,0x01,0x00,0x01 };
1564 static BYTE msPubKey3[] = {
1565 0x30,0x82,0x02,0x0a,0x02,0x82,0x02,0x01,0x00,0xf3,0x5d,0xfa,0x80,0x67,0xd4,
1566 0x5a,0xa7,0xa9,0x0c,0x2c,0x90,0x20,0xd0,0x35,0x08,0x3c,0x75,0x84,0xcd,0xb7,
1567 0x07,0x89,0x9c,0x89,0xda,0xde,0xce,0xc3,0x60,0xfa,0x91,0x68,0x5a,0x9e,0x94,
1568 0x71,0x29,0x18,0x76,0x7c,0xc2,0xe0,0xc8,0x25,0x76,0x94,0x0e,0x58,0xfa,0x04,
1569 0x34,0x36,0xe6,0xdf,0xaf,0xf7,0x80,0xba,0xe9,0x58,0x0b,0x2b,0x93,0xe5,0x9d,
1570 0x05,0xe3,0x77,0x22,0x91,0xf7,0x34,0x64,0x3c,0x22,0x91,0x1d,0x5e,0xe1,0x09,
1571 0x90,0xbc,0x14,0xfe,0xfc,0x75,0x58,0x19,0xe1,0x79,0xb7,0x07,0x92,0xa3,0xae,
1572 0x88,0x59,0x08,0xd8,0x9f,0x07,0xca,0x03,0x58,0xfc,0x68,0x29,0x6d,0x32,0xd7,
1573 0xd2,0xa8,0xcb,0x4b,0xfc,0xe1,0x0b,0x48,0x32,0x4f,0xe6,0xeb,0xb8,0xad,0x4f,
1574 0xe4,0x5c,0x6f,0x13,0x94,0x99,0xdb,0x95,0xd5,0x75,0xdb,0xa8,0x1a,0xb7,0x94,
1575 0x91,0xb4,0x77,0x5b,0xf5,0x48,0x0c,0x8f,0x6a,0x79,0x7d,0x14,0x70,0x04,0x7d,
1576 0x6d,0xaf,0x90,0xf5,0xda,0x70,0xd8,0x47,0xb7,0xbf,0x9b,0x2f,0x6c,0xe7,0x05,
1577 0xb7,0xe1,0x11,0x60,0xac,0x79,0x91,0x14,0x7c,0xc5,0xd6,0xa6,0xe4,0xe1,0x7e,
1578 0xd5,0xc3,0x7e,0xe5,0x92,0xd2,0x3c,0x00,0xb5,0x36,0x82,0xde,0x79,0xe1,0x6d,
1579 0xf3,0xb5,0x6e,0xf8,0x9f,0x33,0xc9,0xcb,0x52,0x7d,0x73,0x98,0x36,0xdb,0x8b,
1580 0xa1,0x6b,0xa2,0x95,0x97,0x9b,0xa3,0xde,0xc2,0x4d,0x26,0xff,0x06,0x96,0x67,
1581 0x25,0x06,0xc8,0xe7,0xac,0xe4,0xee,0x12,0x33,0x95,0x31,0x99,0xc8,0x35,0x08,
1582 0x4e,0x34,0xca,0x79,0x53,0xd5,0xb5,0xbe,0x63,0x32,0x59,0x40,0x36,0xc0,0xa5,
1583 0x4e,0x04,0x4d,0x3d,0xdb,0x5b,0x07,0x33,0xe4,0x58,0xbf,0xef,0x3f,0x53,0x64,
1584 0xd8,0x42,0x59,0x35,0x57,0xfd,0x0f,0x45,0x7c,0x24,0x04,0x4d,0x9e,0xd6,0x38,
1585 0x74,0x11,0x97,0x22,0x90,0xce,0x68,0x44,0x74,0x92,0x6f,0xd5,0x4b,0x6f,0xb0,
1586 0x86,0xe3,0xc7,0x36,0x42,0xa0,0xd0,0xfc,0xc1,0xc0,0x5a,0xf9,0xa3,0x61,0xb9,
1587 0x30,0x47,0x71,0x96,0x0a,0x16,0xb0,0x91,0xc0,0x42,0x95,0xef,0x10,0x7f,0x28,
1588 0x6a,0xe3,0x2a,0x1f,0xb1,0xe4,0xcd,0x03,0x3f,0x77,0x71,0x04,0xc7,0x20,0xfc,
1589 0x49,0x0f,0x1d,0x45,0x88,0xa4,0xd7,0xcb,0x7e,0x88,0xad,0x8e,0x2d,0xec,0x45,
1590 0xdb,0xc4,0x51,0x04,0xc9,0x2a,0xfc,0xec,0x86,0x9e,0x9a,0x11,0x97,0x5b,0xde,
1591 0xce,0x53,0x88,0xe6,0xe2,0xb7,0xfd,0xac,0x95,0xc2,0x28,0x40,0xdb,0xef,0x04,
1592 0x90,0xdf,0x81,0x33,0x39,0xd9,0xb2,0x45,0xa5,0x23,0x87,0x06,0xa5,0x55,0x89,
1593 0x31,0xbb,0x06,0x2d,0x60,0x0e,0x41,0x18,0x7d,0x1f,0x2e,0xb5,0x97,0xcb,0x11,
1594 0xeb,0x15,0xd5,0x24,0xa5,0x94,0xef,0x15,0x14,0x89,0xfd,0x4b,0x73,0xfa,0x32,
1595 0x5b,0xfc,0xd1,0x33,0x00,0xf9,0x59,0x62,0x70,0x07,0x32,0xea,0x2e,0xab,0x40,
1596 0x2d,0x7b,0xca,0xdd,0x21,0x67,0x1b,0x30,0x99,0x8f,0x16,0xaa,0x23,0xa8,0x41,
1597 0xd1,0xb0,0x6e,0x11,0x9b,0x36,0xc4,0xde,0x40,0x74,0x9c,0xe1,0x58,0x65,0xc1,
1598 0x60,0x1e,0x7a,0x5b,0x38,0xc8,0x8f,0xbb,0x04,0x26,0x7c,0xd4,0x16,0x40,0xe5,
1599 0xb6,0x6b,0x6c,0xaa,0x86,0xfd,0x00,0xbf,0xce,0xc1,0x35,0x02,0x03,0x01,0x00,
1600 0x01 };
1601
1602 static BOOL WINAPI verify_ms_root_policy(LPCSTR szPolicyOID,
1603  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
1604  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
1605 {
1606     BOOL ret = verify_base_policy(szPolicyOID, pChainContext, pPolicyPara,
1607      pPolicyStatus);
1608
1609     if (ret && !pPolicyStatus->dwError)
1610     {
1611         CERT_PUBLIC_KEY_INFO msPubKey = { { 0 } };
1612         BOOL isMSRoot = FALSE;
1613         DWORD i;
1614         CRYPT_DATA_BLOB keyBlobs[] = {
1615          { sizeof(msPubKey1), msPubKey1 },
1616          { sizeof(msPubKey2), msPubKey2 },
1617          { sizeof(msPubKey3), msPubKey3 },
1618         };
1619         PCERT_SIMPLE_CHAIN rootChain =
1620          pChainContext->rgpChain[pChainContext->cChain -1 ];
1621         PCCERT_CONTEXT root =
1622          rootChain->rgpElement[rootChain->cElement - 1]->pCertContext;
1623
1624         for (i = 0; !isMSRoot && i < sizeof(keyBlobs) / sizeof(keyBlobs[0]);
1625          i++)
1626         {
1627             msPubKey.PublicKey.cbData = keyBlobs[i].cbData;
1628             msPubKey.PublicKey.pbData = keyBlobs[i].pbData;
1629             if (CertComparePublicKeyInfo(
1630              X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1631              &root->pCertInfo->SubjectPublicKeyInfo, &msPubKey))
1632                 isMSRoot = TRUE;
1633         }
1634         if (isMSRoot)
1635             pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = 0;
1636     }
1637     return ret;
1638 }
1639
1640 typedef BOOL (WINAPI *CertVerifyCertificateChainPolicyFunc)(LPCSTR szPolicyOID,
1641  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
1642  PCERT_CHAIN_POLICY_STATUS pPolicyStatus);
1643
1644 BOOL WINAPI CertVerifyCertificateChainPolicy(LPCSTR szPolicyOID,
1645  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
1646  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
1647 {
1648     static HCRYPTOIDFUNCSET set = NULL;
1649     BOOL ret = FALSE;
1650     CertVerifyCertificateChainPolicyFunc verifyPolicy = NULL;
1651     HCRYPTOIDFUNCADDR hFunc = NULL;
1652
1653     TRACE("(%s, %p, %p, %p)\n", debugstr_a(szPolicyOID), pChainContext,
1654      pPolicyPara, pPolicyStatus);
1655
1656     if (!HIWORD(szPolicyOID))
1657     {
1658         switch (LOWORD(szPolicyOID))
1659         {
1660         case (int)CERT_CHAIN_POLICY_BASE:
1661             verifyPolicy = verify_base_policy;
1662             break;
1663         case (int)CERT_CHAIN_POLICY_AUTHENTICODE:
1664             verifyPolicy = verify_authenticode_policy;
1665             break;
1666         case (int)CERT_CHAIN_POLICY_BASIC_CONSTRAINTS:
1667             verifyPolicy = verify_basic_constraints_policy;
1668             break;
1669         case (int)CERT_CHAIN_POLICY_MICROSOFT_ROOT:
1670             verifyPolicy = verify_ms_root_policy;
1671             break;
1672         default:
1673             FIXME("unimplemented for %d\n", LOWORD(szPolicyOID));
1674         }
1675     }
1676     if (!verifyPolicy)
1677     {
1678         if (!set)
1679             set = CryptInitOIDFunctionSet(
1680              CRYPT_OID_VERIFY_CERTIFICATE_CHAIN_POLICY_FUNC, 0);
1681         CryptGetOIDFunctionAddress(set, X509_ASN_ENCODING, szPolicyOID, 0,
1682          (void **)&verifyPolicy, hFunc);
1683     }
1684     if (verifyPolicy)
1685         ret = verifyPolicy(szPolicyOID, pChainContext, pPolicyPara,
1686          pPolicyStatus);
1687     if (hFunc)
1688         CryptFreeOIDFunctionAddress(hFunc, 0);
1689     return ret;
1690 }